Electric wrench

Abstract

The utility model relates to the field of electric appliances, in particular to an electric wrench, which comprises a body, a motor, a fan and an accommodating cavity for positioning the motor, the motor is positioned in the accommodating cavity, and the electric wrench is characterized in that a support part partially contacted with the motor is arranged in the accommodating cavity; the supporting part is arranged on the inner wall of the body so that a flowing space for air to pass through can be formed between the motor and the inner wall of the containing cavity, an air flow channel is formed in the containing cavity and used for air exchange between the flowing space and the interior of the body, and the body is provided with a first air inlet and an air outlet corresponding to the fan. According to the technical scheme, the flow space is formed on the periphery of the outer wall of the motor, the purpose of achieving gas exchange between the flow space and the interior of the body is achieved, and the design has the advantages that more area on the motor can make contact with air, so that more heat can be taken away by single airflow, and the problem that the heat obtaining capacity is poor is solved.

Description

Technical Field

[0001] This utility model relates to the field of electric appliances, and more particularly to an electric wrench. Background Technology

[0002] Existing electric wrenches all have a built-in fan, which is attached to the bottom of the motor. The fan draws air to the bottom of the motor and then exhausts it out through the casing.

[0003] However, this heat dissipation effect is not good. This heat dissipation method is for heat transfer on a single surface. When the motor is working, the entire outer wall emits heat. Therefore, the existing heat dissipation effect is relatively weak. In high-temperature environments, the control system inside the electric wrench will stop the motor from working to prevent it from overheating and burning out. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides an electric wrench designed to solve the issue of poor heat dissipation capacity.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an electric wrench, comprising a body, a motor and a fan disposed within the body, and a receiving cavity for positioning the motor, wherein the motor is located within the receiving cavity. The characteristic feature is that a support portion is provided within the receiving cavity that partially contacts the motor, thereby forming a flow space for gas to pass through between the motor and the inner wall of the receiving cavity, and a gas flow channel is formed on the receiving cavity for gas exchange between the flow space and the interior of the body. The body is provided with a first air inlet and an exhaust outlet corresponding to the fan.

[0006] The beneficial effects of this utility model are:

[0007] This invention utilizes the physical structure of the support and the gas flow channel to create a flow space around the outer wall of the motor, and to achieve gas exchange between the flow space and the interior of the motor body. The advantage of this design is that more area on the motor can come into contact with the air, which allows a single airflow to carry away more heat, thus solving the problem of poor heat dissipation.

[0008] In this embodiment, the receiving cavity is composed of multiple chambers within the main body. The chambers are positioned on the motor by a support, and the gaps between the chambers form gas flow channels. The advantage of this design is that the chambers can be easily formed by injection molding, and only the size of the mold core needs to be adjusted to make the gaps between the multiple chambers on the motor form, eliminating the need for other processes to form gas flow channels later.

[0009] The aforementioned gas flow path is linear and parallel to the axial line of the motor. Its advantage is that the contact area between the motor and the airflow is larger, resulting in higher heat dissipation efficiency.

[0010] The beginning and end of the gas flow channel correspond to the two ends inside the main body. In this way, the heat at both ends of the motor can also be exchanged with the gas flow channel. Therefore, heat from various sources accumulates in the gas flow channel. Thus, by placing the fan outside the middle part of the motor and setting the second air inlet of the fan to correspond to the flow space, heat accumulation can be avoided, greatly reducing the impact of heat on the motor.

[0011] In this embodiment, the first air inlet is located at both ends of the motor.

[0012] Since the fan is located outside the middle part of the motor, which corresponds to the middle part inside the main body, a groove is provided on the main body to prevent the hot air from affecting the operators. The inner surface of the groove is inclined, and the exhaust port is located on the inner surface. The hot air is discharged in a designated direction and will not spread to the surroundings. Specifically, this fan is a side-discharge axial flow fan. Attached Figure Description

[0013] Figure 1 This is a perspective view of the concealed portion of the outer shell of this utility model.

[0014] Figure 2 yes Figure 1 Enlarged diagram of point A.

[0015] Figure 3 This is a perspective view of the hidden portion of the outer shell of this utility model.

[0016] Figure 4 yes Figure 3 Enlarged diagram of point B.

[0017] Figure 5 This is a perspective view of the present invention.

[0018] Figure 6 yes Figure 5 Enlarged diagram of point C.

[0019] Figure 7 yes Figure 5 Enlarged diagram of point D.

[0020] Figure 8 This is a cross-sectional view of the present invention.

[0021] Figure 9 yes Figure 8 Enlarged diagram of point E.

[0022] Figure 10 This is a perspective view of another cross-sectional view of this utility model.

[0023] Figure 11 It is a three-dimensional view of the main body. Detailed Implementation

[0024] like Figure 1-11 As shown, an electric wrench includes a body 1, a motor 2 and a fan 3 disposed within the body 1, and a receiving cavity for positioning the motor 2 within the body 1. The motor 2 is located within the receiving cavity. The characteristic feature is that a support portion 3a is provided within the receiving cavity to partially contact the motor 2, thereby forming a flow space 100 for gas passage between the motor 2 and the inner wall of the receiving cavity, and a gas flow channel 200 is formed on the receiving cavity. Figure 10 The portion outlined in the center line is used for gas exchange between the flow space 100 and the interior of the main body 1. The main body 1 is provided with a first air inlet 1a and an exhaust outlet 1b corresponding to the fan 3.

[0025] The beneficial effects of this utility model are:

[0026] This invention utilizes the physical structure of the support part 3a and the gas flow channel 200 to form a flow space 100 around the outer wall of the motor 2, and to achieve gas exchange between the flow space 100 and the interior of the body 1. The advantage of this design is that more area on the motor 2 can come into contact with the air, which allows a single airflow to carry away more heat, thus solving the problem of poor heat dissipation capacity.

[0027] In this embodiment, the receiving cavity is composed of multiple chambers 4 within the main body 1. The support part 3a is part of the chamber. The chamber 4 is positioned on the motor 2 by the support part 3a. A flow space 100 is formed between the interior of the chamber 4 and the motor 2. A gas flow channel 200 is formed between the gaps between the chambers 4. The advantage of this design is that the chamber 4 can be easily formed by injection molding. Moreover, only the size of the mold core needs to be adjusted to make a gap formed between the multiple chambers 4 on the motor 2. No other process for forming the gas flow channel 200 is required later.

[0028] The gas flow channel 200 is linear and parallel to the axial line of the motor 2. The advantage of this is that the motor 2 has a larger contact area with the airflow, resulting in higher heat dissipation efficiency.

[0029] The beginning and end ends of the gas flow channel 200 correspond to the two ends inside the main body 1. In this way, the heat at both ends of the motor 2 can also exchange heat with the gas flow channel 200. Therefore, the gas flow channel 200 accumulates heat from various sources. Hence, the fan 3 is positioned outside the middle part of the motor 2, and the second air inlet of the fan 3 is set to correspond to the flow space 100 (e.g., Figure 9 As indicated by the arrow in the image, this can prevent heat buildup and greatly reduce the impact of heat on motor 2.

[0030] In this embodiment, the first air inlet 1a is located at both ends of the motor.

[0031] Since the fan 3 is located outside the middle part of the motor 2, that is, inside the middle part of the main body 1, in order to avoid the hot air from affecting the workers, the main body 1 is provided with a groove 5. The inner surface of the groove 5 is inclined, and the exhaust port 1b is located on the inner surface. The hot air is discharged in the specified direction and will not spread to the surroundings. Specifically, this fan 3 is a side-discharge axial flow fan 3.

[0032] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An electric wrench comprising a body, wherein a motor and a fan are disposed within the body, and a receiving cavity for positioning the motor is provided within the receiving cavity, characterized in that, The cavity is provided with a support part that partially contacts the motor, so that a flow space for gas to pass through is formed between the motor and the inner wall of the cavity. A gas flow channel is formed on the cavity for gas exchange between the flow space and the interior of the body. The body is provided with a first air inlet and an exhaust port corresponding to the fan.

2. The electric wrench according to claim 1, characterized in that, The containment cavity is composed of multiple chambers within the main body. The chambers are positioned on the motor by a support, and gas flow channels are formed between the chambers.

3. An electric wrench according to claim 1, characterized in that, The gas flow path is linear and parallel to the axial line of the motor.

4. An electric wrench according to claim 1, characterized in that, The beginning and end of the gas flow channel correspond to the two ends inside the main body. The fan is located outside the middle part of the motor, and the second air inlet of the fan is set to correspond to the flow space.

5. An electric wrench according to claim 1, characterized in that, The first air inlet is located at both ends of the motor.

6. An electric wrench according to claim 1, characterized in that, The main body has a groove, the inner surface of which is inclined, and the exhaust port is located on the inner surface.

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