Built-in integrated structure of electric impact wrench

Abstract

The utility model discloses a built-in integral structure of an electric impact wrench, which comprises an outer shell, a head shell and a motor shell, the outer shell is made of plastic materials, the head shell is fixedly connected to the front part of the motor shell, and the head shell and the motor shell are combined into a whole so as to be used for assembling a motor and a power transmission component of the wrench. The motor and the power transmission assembly are installed on the whole formed by combining the head shell and the motor shell, then the whole is connected with the shell, the whole is installed in the shell to form a package, installation is convenient, the motor and the power transmission assembly can be pre-installed on the whole formed by the head shell and the motor shell, and therefore the motor and the power transmission assembly can be installed conveniently. In addition, the plastic outer shell wraps the whole impact wrench, a heat insulation effect can be achieved, the head of the impact wrench cannot be too hot, and a user is effectively prevented from being scalded due to mistaken touch.

Description

Technical Field

[0001] The utility model relates to a wrench, in particular to a built-in integrated structure of an electric impact wrench. Background Art

[0002] Traditionally, the removal or installation of screws, bolts or nuts is done manually, which is inefficient and labor-intensive, and can no longer meet the requirements of installation and maintenance. However, with the development of society, the assembly of screws, bolts or nuts is also moving towards mechanization. An electric wrench is an electric tool used to remove or tighten screws, bolts or nuts. The electric wrench is powered by a motor, which drives the wrench head to generate impact torque, and quickly removes and installs bolts or nuts.

[0003] For example, the rechargeable electric wrench disclosed in Chinese utility model patent CN203077178U includes a battery pack, a speed control switch, a forward and reverse push button, a shell, a motor, an intermediate cover, a transmission mechanism, an aluminum head shell, an impact mechanism, and an output shaft. The motor is fixedly installed in the shell, the aluminum head shell is fixedly installed at the front of the shell, the transmission mechanism and the impact mechanism are installed in the aluminum head shell, and the output shaft is installed at the front end of the aluminum head shell. The transmission mechanism and the impact mechanism receive the power provided by the motor and transmit it to the output shaft at the front end, so that the output shaft outputs impact torque.

[0004] The head shell of the existing electric impact wrench is fixed to the front end of the shell by screws, the motor is installed in the shell and directly connected to the shell, and the transmission assembly and the impact assembly are installed in the head shell, so that the components are relatively scattered, which is not convenient for installation and connection. In addition, the head shell is made of aluminum and is completely exposed to the outside of the shell. When in use, the transmission assembly and the impact assembly installed in the head shell will cause the head shell to have a higher temperature, so there is a risk of burns caused by the user accidentally touching the head shell. Utility Model Content

[0005] Based on the above-mentioned motor being installed in the shell and directly connected to the shell, the head shell is fixedly installed at the front end of the shell by screws, and the power transmission components such as the transmission component and the impact component are installed in the head shell, so that the motor and the power transmission components are relatively dispersed, which is not convenient for installation and connection, and the aluminum head shell is completely exposed to the outside of the shell, and there is a risk of burns caused by the user accidentally touching the head shell. The utility model provides a built-in self-contained structure of an electric impact wrench.

[0006] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a built-in self-contained structure of an electric impact wrench, including an outer shell, a head shell and a motor shell, the outer shell is made of plastic material, the head shell is fixedly connected to the front part of the motor shell, the head shell and the motor shell are combined into a whole for assembling the motor and power transmission components of the wrench, and the outer shell is wrapped around the outside of the whole.

[0007] A further preferred technical solution of the utility model is: a first assembly cavity that passes through from front to back is provided in the outer shell, the whole is installed in the first assembly cavity, a motor cavity is provided in the motor shell, the motor cavity has a first opening located at the rear end of the motor shell for installing the motor, the first opening is opposite to the rear opening of the first assembly cavity, the rear end of the motor shell is connected to a rear cover, the rear cover is made of plastic material, and the rear cover is located behind the rear opening of the first assembly cavity to cover the rear opening.

[0008] A further preferred technical solution of the utility model is: a first heat dissipation hole connected to the motor cavity is provided on the side wall of the motor shell, a second heat dissipation hole connected to the first heat dissipation hole is provided on the outer shell, and a third heat dissipation hole connected to the motor cavity is provided on the back cover.

[0009] A further preferred technical solution of the utility model is: the head shell and the front part of the motor shell are enclosed to form a second assembly cavity for assembling the power transmission component of the wrench.

[0010] A further preferred technical solution of the utility model is that the head shell and the motor shell are both made of aluminum.

[0011] A further preferred technical solution of the utility model is that an elastic shock-absorbing member for shock absorption is supported between the whole body and the shell.

[0012] A further preferred technical solution of the utility model is: an open groove is provided at the front of the motor housing, a through hole connecting the open groove and the motor cavity is provided on the motor housing, and the open groove and the head housing are enclosed to form the second assembly cavity.

[0013] A further preferred technical solution of the utility model is: the shell comprises a left half shell and a right half shell, and the left half shell and the right half shell are fixedly connected by screws after being matched.

[0014] A further preferred technical solution of the utility model is: a first lug for connection is provided on the circumferential side walls at the front and rear ends of the motor housing, a second lug for connection is provided on the circumferential side walls at the rear end of the head housing, after the rear part of the head housing is aligned with the front part of the motor housing, the first lug at the front end of the motor housing and the second lug at the rear end of the head housing are fixed by screws, the rear cover is fixed to the first lug at the rear end of the motor housing by screws, and the outer shell is provided with avoidance grooves corresponding to the first lug and the second lug.

[0015] A further preferred technical solution of the utility model is that at least two-thirds to three-quarters of the head shell is wrapped in the outer shell.

[0016] Compared with the prior art, the advantage of the utility model is that the head shell is fixedly connected to the front part of the motor shell, and the head shell and the motor shell are combined into a whole, which can be used to install the motor of the wrench and power transmission components such as transmission parts and impact parts, and the plastic shell is wrapped on the outside of the whole. This patent first installs the motor and the power transmission component to the whole formed by the combination of the head shell and the motor shell, and then connects the whole with the shell, and puts the whole into the shell to form a package, which is easy to install. The motor and the power transmission component can be pre-installed on the whole composed of the head shell and the motor shell, and the overall stability is better. In addition, the plastic shell wrapped on the outside of the whole can play a heat insulating role, so that the head of the impact wrench will not be too hot, effectively preventing burns caused by accidental touch by the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of a wrench;

[0019] Figure 2 Cutaway diagram of a wrench Figure 1 ;

[0020] Figure 3 This is a disassembled diagram of the various parts of the wrench;

[0021] Figure 4 It is a schematic diagram of the overall structure composed of the head shell, motor shell and rear cover;

[0022] Figure 5 This is a disassembled diagram of the head shell, motor shell and rear cover;

[0023] Figure 6 Cutaway diagram of a wrench Figure 2 .

[0024] In the figure: 1, outer shell; 2, head shell; 3, front opening; 4, back cover; 5, second heat dissipation hole; 6, third heat dissipation hole; 7, rear opening; 8, motor shell; 9, motor cavity; 10, second assembly cavity; 11, raised portion; 12, slot; 13, elastic shock-absorbing member; 14, first assembly cavity; 15, left half shell; 16, output shaft; 17, right half shell; 18, avoidance groove; 19, whole; 20, second lug; 21, first lug; 22, first heat dissipation hole; 23, opening slot; 24, through hole; 25, first opening. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0026] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0027] Figure 1-Figure 6 As shown, the built-in self-contained structure of the electric impact wrench includes an outer shell 1, a head shell 2 and a motor shell 8. The outer shell 1 is made of plastic material. The head shell 2 is fixedly connected to the front of the motor shell 8. The head shell 2 and the motor shell 8 are combined into a whole 19. The whole 19 is used to assemble the motor and power transmission components of the wrench. The outer shell 1 is wrapped around the outside of the whole 19.

[0028] The power transmission assembly is used to receive the power provided by the motor and transmit it to the output shaft 16 at the front of the impact wrench, so that the output shaft 16 drives the connected sleeve to output impact torque. The power transmission assembly includes a transmission component and an impact component. The transmission component is such as a planetary gear reducer. The transmission component and the impact component are both conventional structures in the field.

[0029] Figure 3 , Figure 4 As shown, the present patent first installs the motor and the power transmission assembly on the integral body 19 formed by the head shell 2 and the motor shell 8, and then connects the integral body 19 to the outer shell 1, and installs the integral body 19 into the outer shell 1 to form a package, which is convenient for installation. The motor and the power transmission assembly can be pre-installed on the integral body 19 composed of the head shell 2 and the motor shell 8, and the integral body 19 has better stability. In addition, the plastic outer shell 1 is wrapped around the outside of the integral body 19, which can play a heat-insulating role, so that the head of the impact wrench will not be too hot, and effectively prevent burns caused by accidental touch by the user.

[0030] Preferably, the head shell 2 and the motor shell 8 are both made of aluminum.

[0031] Figure 1 , Figure 2 As shown, preferably, at least two-thirds to three-quarters of the head shell 2 is wrapped in the shell 1. Most preferably, two-thirds of the head shell 2 is wrapped in the shell 1, and the front end of the head shell 2 partially extends from the front opening 3 of the shell 1.

[0032] Preferably, the outer shell 1 includes a left half shell 15 and a right half shell 17, which are fixedly connected by screws after being matched. The outer shell 1 is divided into the left half shell 15 and the right half shell 17 to facilitate wrapping the whole 19 formed by the combination of the head shell 2 and the motor shell 8 inside.

[0033] Preferably, an elastic shock-absorbing member 13 for shock absorption is supported between the whole 19 and the shell 1. The elastic shock-absorbing member 13 is made of rubber or silicone material and is used to reduce the vibration of the whole 19 during use to make the use more comfortable.

[0034] The elastic shock absorbing member 13 can be directly sandwiched between the integral body 19 and the shell 1; or the elastic shock absorbing member 13 can be glued to the integral body 19 or the shell 1; or a protrusion 11 is provided on the integral body 19, and a slot 12 is provided on the shell 1, and the elastic shock absorbing member 13 is put on the protrusion 11 and snapped into the slot 12.

[0035] Figure 2 As shown, preferably, a first assembly cavity 14 which passes through front and back is provided in the outer shell 1, the whole 19 is installed in the first assembly cavity 14, the front end of the head shell 2 partially extends out from the front opening 3 of the first assembly cavity 14, a motor cavity 9 is provided in the motor shell 8, and the motor is installed in the motor cavity 9, and the motor cavity 9 has a first opening 25 located at the rear end of the motor shell 8 for installing the motor, and the first opening 25 is opposite to the rear opening 7 of the first assembly cavity 14, and the rear end of the motor shell 8 is connected to a rear cover 4, the rear cover 4 is made of plastic material, and the rear cover 4 is located behind the rear opening 7 of the first assembly cavity 14 to cover the rear opening 7.

[0036] The back cover 4 is made of plastic material so that the entire exposed external structure is made of plastic.

[0037] Figure 3 As shown, preferably, a first lug 21 for connection is provided on the circumferential side walls at the front and rear ends of the motor housing 8, and a second lug 20 for connection is provided on the circumferential side walls at the rear end of the head housing 2. After the rear part of the head housing 2 is aligned with the front part of the motor housing 8, the first lug 21 at the front end of the motor housing 8 and the second lug 20 at the rear end of the head housing 2 are fixed by screws, and the rear cover 4 is covered on the rear end of the motor housing 8 and fixed to the first lug 21 at the rear end of the motor housing 8 by screws, and an avoidance groove 18 corresponding to the first lug 21 and the second lug 20 is provided on the outer housing 1.

[0038] The head shell 2 and the front part of the motor shell 8 are enclosed to form a second assembly cavity 10 for assembling the power transmission component of the wrench. Preferably, an opening groove 23 is provided at the front part of the motor shell 8, and a through hole 24 connecting the opening groove 23 and the motor cavity 9 is provided on the motor shell 8. The opening groove 23 and the head shell 2 are enclosed to form the second assembly cavity 10, and the motor shaft of the motor passes through the through hole 24 and extends into the second assembly cavity 10 to provide power output for the power transmission component.

[0039] Figure 6As shown, the side wall of the motor housing 8 is provided with a first heat dissipation hole 22 connected to the motor cavity 9, the housing 1 is provided with a second heat dissipation hole 5 connected to the first heat dissipation hole 22, and the rear cover 4 is provided with a third heat dissipation hole 6 connected to the motor cavity 9. Preferably, the first heat dissipation hole 22 and the second heat dissipation hole 5 are opposite.

[0040] The first heat dissipation hole 22, the second heat dissipation hole 5 and the third heat dissipation hole 6 can form a heat dissipation duct for external air to flow into the motor cavity 9 and then be discharged from the motor cavity 9. The heat on the head shell 2 can be transferred to the motor shell 8, so that when the motor shell 8 dissipates heat, the head shell 2 can also dissipate heat together, and the heat on the head shell 2 can also be directly dissipated from the second heat dissipation hole 5 on the outer shell 1.

[0041] The above is an introduction to the built-in self-contained structure of the electric impact wrench provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. The built-in self-contained structure of the electric impact wrench is characterized by: It includes an outer shell, a head shell and a motor shell. The outer shell is made of plastic material. The head shell is fixedly connected to the front of the motor shell. The head shell and the motor shell are combined into a whole for assembling the motor and power transmission components of the wrench. The outer shell is wrapped around the outside of the whole.

2. The built-in self-contained structure of the electric impact wrench according to claim 1, characterized in that: A first assembly cavity that passes through from front to back is provided in the outer shell, and the whole is installed in the first assembly cavity. A motor cavity is provided in the motor shell, and the motor cavity has a first opening located at the rear end of the motor shell for installing the motor. The first opening is opposite to the rear opening of the first assembly cavity. A rear cover is connected to the rear end of the motor shell, and the rear cover is made of plastic material. The rear cover is located behind the rear opening of the first assembly cavity to cover the rear opening.

3. The built-in self-contained structure of the electric impact wrench according to claim 2, characterized in that: The side wall of the motor shell is provided with a first heat dissipation hole connected to the motor cavity, the outer shell is provided with a second heat dissipation hole connected to the first heat dissipation hole, and the back cover is provided with a third heat dissipation hole connected to the motor cavity.

4. The built-in self-contained structure of the electric impact wrench according to claim 2, characterized in that: The head shell and the front part of the motor shell are enclosed to form a second assembly cavity for assembling the power transmission component of the wrench.

5. The built-in self-contained structure of the electric impact wrench according to claim 1, characterized in that: The head shell and the motor shell are both aluminum parts.

6. The built-in self-contained structure of the electric impact wrench according to claim 1, characterized in that: An elastic shock-absorbing member for shock absorption is supported between the whole and the shell.

7. The built-in self-contained structure of the electric impact wrench according to claim 4, characterized in that: An opening groove is arranged at the front of the motor housing, a through hole connecting the opening groove and the motor cavity is arranged on the motor housing, and the opening groove and the head housing are combined to form the second assembly cavity.

8. The built-in self-contained structure of the electric impact wrench according to claim 1, characterized in that: The shell comprises a left half shell and a right half shell, and the left half shell and the right half shell are fixedly connected by screws after being matched.

9. The built-in self-contained structure of the electric impact wrench according to claim 2, characterized in that: The circumferential side walls at the front and rear ends of the motor housing are both provided with first lugs for connection, and the circumferential side walls at the rear end of the head housing are provided with second lugs for connection. After the rear part of the head housing is aligned with the front part of the motor housing, the first lug at the front end of the motor housing and the second lug at the rear end of the head housing are fixed by screws, and the rear cover is fixed to the first lug at the rear end of the motor housing by screws, and the outer housing is provided with avoidance grooves corresponding to the first lug and the second lug.

10. The built-in self-contained structure of the electric impact wrench according to claim 2, characterized in that: At least two-thirds to three-quarters of the head shell is wrapped in the outer shell.

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