Electric tool

Abstract

The utility model provides an electric tool which comprises a head shell, a tail cover, a main shell and a gear box assembly, the main shell is located between the head shell and the tail cover, the gear box assembly is located in the main shell, the gear box assembly comprises a gear box shell, the gear box shell is matched with the head shell to form a gear containing cavity, and the gear box shell comprises an inner gear ring; the inner gear ring is exposed out of the gear containing cavity.

Description

Technical Field

[0001] The present application relates to the field of tools, and in particular to an electric tool. Background Art

[0002] An electric wrench is a tool for tightening bolts and nuts. It is powered by a power source or battery. It is used to tighten and loosen bolts and nuts. It is a tool for tightening high-strength bolts.

[0003] An electric wrench typically consists of a head shell, a main housing, a tail cover, and a gearbox assembly. The gearbox assembly consists of the gearbox housing, a ring gear mounted within the housing, and a retaining ring to secure the ring gear. During assembly, the ring gear is first installed into the gearbox housing, and then the retaining ring is snapped on to secure it. A bushing is placed between the output shaft and the head shell. During assembly, the bushing is typically pressed into the housing, and then a gasket is installed. The assembly process is complex, and specialized tooling is required to install the retaining ring and bushing.

[0004] Therefore, it is necessary to provide a new electric wrench. Utility Model Content

[0005] The present application provides an electric tool with integrated parts and more convenient assembly.

[0006] Specifically, the present application provides an electric tool, comprising:

[0007] head shell;

[0008] tail cover;

[0009] A main housing, located between the head housing and the tail housing;

[0010] A gear box assembly is located in the main housing, the gear box assembly includes a gear box housing, and the gear box housing cooperates with the head housing to form a gear receiving cavity;

[0011] The gear box housing includes an inner gear ring, and the inner gear ring is exposed in the gear accommodating cavity.

[0012] Furthermore, the gearbox housing is made by powder metallurgy technology.

[0013] Furthermore, the inner gear ring includes an annular portion and a plurality of teeth extending from the annular portion, and the plurality of teeth are distributed in an annular shape and arranged toward the gear receiving cavity.

[0014] Furthermore, the power tool also includes an output shaft, which extends from the head shell; the power tool also includes a bushing, which is arranged between the head shell and the output shaft, and the output shaft includes a main shaft and a shoulder, and the bushing abuts against the main shaft and the shoulder.

[0015] Furthermore, the bushing is L-shaped and includes a first portion and a second portion that are vertically arranged. The first portion abuts against the main shaft, and the second portion abuts against the shaft shoulder.

[0016] Furthermore, the main shell includes a main body, a grip and a battery pack installation portion, the grip is located between the main body and the battery installation portion, and the power tool also includes a battery pack, which is installed in the battery pack installation portion.

[0017] Furthermore, the main body is arranged outside the gear box housing.

[0018] Furthermore, the electric tool also includes a fixing member, which fixes the head shell, the gear box shell and the main shell together.

[0019] Furthermore, the gearbox housing includes a base and a flange portion extending from the base, the flange portion is clamped between the head shell and the main body portion, and the flange portion is provided with a fixing hole for the fixing member to pass through.

[0020] Furthermore, the main shell includes a left half shell and a right half shell, and the left half shell and the right half shell are assembled to form the main shell.

[0021] In this application, the parts of the power tool are modularized, which reduces the assembly steps and greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of part of the structure of the electric tool of the present application.

[0023] Figure 2 yes Figure 1 A perspective exploded view of part of the structure of the power tool shown.

[0024] Figure 3 yes Figure 2 A structural diagram of part of the structure of the power tool shown.

[0025] Figure 4 yes Figure 3 A perspective exploded view of part of the structure of the power tool shown.

[0026] Figure 5 yes Figure 3 The cross-sectional view of part of the structure of the power tool is taken along line AA. DETAILED DESCRIPTION

[0027] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with this application.

[0028] 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, technical or scientific terms used in this application should have the same ordinary meaning as those of ordinary skill in the art to which this invention belongs. The terms "first," "second," and similar terms used in this application do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather indicate the presence of at least one. "Multiple" or "several" means two or more. Unless otherwise indicated, terms such as "front," "rear," "lower," and / or "upper" are for convenience only and are not intended to limit a position or spatial orientation. Terms such as "include" or "comprising" mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0029] Please combine Figures 1 to 5 The present application provides an electric tool, which includes a head shell 10, a main shell 20 and a tail cover 30. The main shell 20 is located between the head shell 10 and the tail cover 30. The main shell 20 includes a left half shell 21 and a right half shell 22. The left half shell 21 and the right half shell 22 are assembled to form the main shell 20. The electric tool also includes a gear box assembly 40, which is located in the main shell 20. The gear box assembly 40 includes a gear box housing 41, which cooperates with the head shell 10 to form a gear receiving chamber 43. The electric tool also includes a fixing member 50, which fixes the head shell 10, the gear box housing 41 and the main shell 20 together.

[0030] The power tool also includes an output shaft 60, a portion of which extends from the head shell 10, and another portion of which is located in the head shell 10. The power tool also includes a bushing 70, which is located in the head shell 10 and is arranged between the head shell 10 and the output shaft 60. During assembly, the bushing 70 is cast into the head shell 10 together with the head shell 10 as an insert when the head shell 10 is die-cast. The output shaft 60 includes a main shaft 61 and a shoulder 62. The bushing 70 abuts against the main shaft 61 and the shoulder 62. The bushing 70 is L-shaped, and the bushing 70 includes a first part 71 and a second part 72 arranged vertically, the first part 71 abuts against the main shaft 61, and the second part 72 abuts against the shoulder 62.

[0031] The main housing 20 includes a main body 23, a grip 24, and a battery pack mounting portion 25. The grip 24 is located between the main body 23 and the battery pack mounting portion 25. The power tool also includes a battery pack 80, which is mounted on the battery pack mounting portion 25. The main body 23 is disposed outside the gearbox housing 41. The gearbox housing 41 includes a base 411 and a flange 412 extending from the base 411. The base 411 is covered by the main body 23. The flange 412 is sandwiched between the head shell 10 and the main body 23. The flange 412 is provided with a fixing hole 413, through which the fixing member 50 passes.

[0032] The gearbox housing 41 includes an inner ring gear 42, which is exposed within a gear receiving cavity 43. Specifically, the base 411 of the gearbox housing 41 includes a base 44 and the inner ring gear 42, which are integrally formed. The inner ring gear 42 includes an annular portion 421 and a plurality of teeth 422 extending from the annular portion 421. The teeth 422 are arranged in an annular pattern and face the gear receiving cavity 43. The gearbox assembly 40 also includes a gear assembly (not shown) housed within the gear receiving cavity 43. The inner ring gear 42 mates with the gear assembly housed within the gear receiving cavity 43. The gearbox housing 41 is manufactured using powder metallurgy techniques.

[0033] In this application, the parts of the power tool are modularized, which reduces the assembly steps and greatly improves work efficiency.

[0034] The above description is merely a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with this profession can make slight changes or modifications to equivalent embodiments with equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An electric tool comprising: head shell; tail cover; A main housing, located between the head housing and the tail housing; The gear box assembly is located in the main housing, and the gear box assembly includes a gear box housing, and the gear box housing cooperates with the head shell to form a gear receiving cavity; characterized in that, The gear box housing includes an inner gear ring, and the inner gear ring is exposed in the gear accommodating cavity.

2. The electric tool according to claim 1, wherein: The gearbox housing is made by powder metallurgy technology.

3. The electric tool according to claim 1, wherein: The inner gear ring includes an annular portion and a plurality of tooth portions extending from the annular portion. The plurality of tooth portions are distributed in an annular shape and are disposed toward the gear receiving cavity.

4. The electric tool according to claim 1, wherein: The electric tool also includes an output shaft extending from the head shell; the electric tool also includes a bushing arranged between the head shell and the output shaft, the output shaft includes a main shaft and a shoulder, and the bushing abuts against the main shaft and the shoulder.

5. The electric tool according to claim 4, characterized in that The bushing is L-shaped and includes a first portion and a second portion that are vertically arranged. The first portion abuts against the main shaft, and the second portion abuts against the shaft shoulder.

6. The electric tool according to claim 1, wherein: The main housing includes a main body, a grip and a battery pack mounting portion, wherein the grip is located between the main body and the battery pack mounting portion. The power tool further includes a battery pack, which is mounted on the battery pack mounting portion.

7. The electric tool according to claim 6, wherein: The main body is arranged outside the gear box housing.

8. The electric tool according to claim 7, wherein: The electric tool further includes a fixing member, which fixes the head shell, the gear box housing and the main housing together.

9. The electric tool according to claim 8, wherein: The gear box housing includes a base and a flange portion extending from the base, the flange portion is sandwiched between the head shell and the main body portion, and the flange portion is provided with a fixing hole for the fixing member to pass through.

10. The electric tool according to claim 1, wherein: The main housing includes a left half housing and a right half housing, and the left half housing and the right half housing are assembled to form the main housing.

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