An output mechanism for an electric impact wrench and an electric impact wrench

Abstract

The utility model discloses an output mechanism and electric impact wrench for electric impact wrench belongs to mechanical tool technical field, the utility model discloses through setting the accommodating groove in the output mechanism of electric impact wrench near the part of output head to accommodate torque sensor, and the torque sensor is electrically connected with electric impact wrench, through pre -input preset torque value, and torque sensor real -time detection output head's torque information and output it to electric impact wrench, and then to control electric impact wrench output end's torque output, avoid the problem that output torque is too big or too small, make including the electric impact wrench of this output mechanism can realize accurate control to the output torque of electric impact wrench according to the input of user, has promoted the use precision and effect of electric impact wrench.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology, and in particular relates to an output mechanism for an electric impact wrench and an electric impact wrench. Background Technology

[0002] Electric impact wrenches are commonly used equipment in installation and maintenance. The working principle of existing electric impact wrenches is that the manufacturer selects and designs the motor power appropriately to achieve the rated output torque. In actual use, consumers only need to press the button by hand to control the electrode current, thereby controlling the speed and output torque of the impact socket.

[0003] Because existing electric impact wrenches do not have torque detection capabilities, they are prone to producing output torque that is too low to pre-tighten bolts or output torque that is too high, causing the pre-tightened bolts to break, resulting in operational failures and even safety risks. Summary of the Invention

[0004] To address the aforementioned problem of inaccurate torque output in existing electric impact wrenches, this invention proposes a torque sensor for electric impact wrenches and an electric impact wrench. By developing a torque detection function based on the electric impact wrench, accurate detection of the output torque of the impact wrench can be achieved.

[0005] In a first aspect, the present invention discloses an output mechanism (2) for an electric impact wrench, comprising an output head (3), an impact block (5), and a torque sensor (6), wherein the impact block (5) is used to receive the torque of the electric impact wrench and transmit it to the output head (3), and the torque sensor (6) is used to measure the torque value output by the output head (3).

[0006] Furthermore, the output mechanism (2) includes a shaft (4) which is connected to the output head (3) and the impact block (5). The shaft (4) is provided with a receiving groove (7) for accommodating the torque sensor (6).

[0007] Furthermore, the torque sensor (6) includes an elastomer (61) disposed in the receiving groove (7) for sensing the torque on the output head and deforming when subjected to torque.

[0008] Furthermore, the torque sensor (6) includes a sensitive element (62) which is uniformly or symmetrically distributed on the elastic body (61) for measuring the deformation signal of the elastic body (61). The number of the sensitive elements (62) is an integer multiple of 4.

[0009] Furthermore, the output mechanism (2) is also equipped with a carbon brush slip ring (8), which is mounted on the shaft (4) for electrical connection with the torque sensor (6).

[0010] Furthermore, the receiving groove (7) also includes a wire groove (64) adjacent to the receiving groove (7) for accommodating the power line and signal cable connecting the carbon brush slip ring (8) and the torque sensor (6).

[0011] Furthermore, the impact block (5) of the output mechanism (2) is provided with two protrusions for cooperating with the electric impact wrench to obtain the output torque of the electric impact wrench and transmit it to the output head.

[0012] In a second aspect of this utility model, this utility model discloses an electric impact wrench including the output mechanism (2) described in any one of the first aspects, including a transmission mechanism, which cooperates with the output mechanism to transmit the output torque of the electric impact wrench to the output mechanism.

[0013] Furthermore, the electric impact wrench also includes a housing (13) on which a support bushing (14) is provided. The support bushing (14) is used to support the output mechanism (2) and restrict the axial and radial movement of the output mechanism (2).

[0014] Furthermore, the electric impact wrench also includes an input device (110) and a display device (120). The input device (110) is used to input the working mode and preset torque value of the electric impact wrench; the display device (120) is used to display the information input by the user and the working information of the electric wrench.

[0015] This utility model discloses an output mechanism for an electric impact wrench and an electric impact wrench in the field of mechanical tool technology. The utility model incorporates a receiving groove near the output head in the output mechanism of the electric impact wrench to accommodate a torque sensor. The torque sensor is electrically connected to the electric impact wrench. By pre-inputting a preset torque value, and with the torque sensor detecting the torque information of the output head in real time and outputting it to the electric impact wrench, the torque output of the electric impact wrench is controlled. This avoids the problem of excessive or insufficient output torque, enabling the electric impact wrench including this output mechanism to achieve precise control of the output torque based on user input, thus improving the accuracy and effectiveness of the electric impact wrench. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the electric impact wrench in this utility model;

[0017] Figure 2This is a schematic diagram of the output mechanism for the electric impact wrench in this utility model;

[0018] Figure 3 This is a schematic diagram of the torque sensor of the output mechanism in this utility model;

[0019] Figure 4 This is a cross-sectional view of the electric impact wrench of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be further clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] To make the utility model's objectives, technical solutions, and advantages clearer, the technical solution of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

[0022] Electric impact wrenches are commonly used equipment in installation and maintenance. The working principle of existing electric impact wrenches is that the manufacturer selects and designs the motor power appropriately to achieve the rated output torque. In actual use, consumers only need to press the button by hand to control the electrode current, thereby controlling the speed and output torque of the impact socket.

[0023] Because existing electric impact wrenches do not have torque detection capabilities, they are prone to producing output torque that is too low to pre-tighten bolts or output torque that is too high, causing the pre-tightened bolts to break, resulting in operational failures and even safety risks.

[0024] To address the aforementioned problems in the prior art, this utility model discloses an output mechanism for an electric impact wrench. This output device incorporates a torque sensor at the output head of the electric impact wrench, connecting the sensor to the impact head. Real-time detection by the torque sensor controls the torque output of the electric impact wrench, preventing excessive or insufficient output torque. Furthermore, this utility model also discloses an electric impact wrench including this output mechanism. This electric impact wrench can precisely control the output torque based on user input, improving the accuracy and effectiveness of the electric impact wrench. Figure 1The middle part is a schematic diagram of the electric impact wrench (1) of this utility model.

[0025] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0026] like Figure 2 As shown in Embodiment 1 of this utility model, an output mechanism 2 for an electric impact wrench is disclosed, including an output head 3, a shaft 4, and an impact block 5. The output head 3 and the impact block 5 are connected by the shaft 4. The impact block 5 is connected to the electric impact wrench drive system and transmits the rotational impact of the electric impact wrench to the output head 3 through the shaft 4. The output head 3 has a square structure, and the front end of the output head 3 is used for the wrench head. Various wrench head models are available to adapt to different bolt sizes. In actual use, the wrench head transmits the output torque to the bolt to achieve bolt pre-tightening. In one embodiment of this utility model, the output head 3, shaft 4, and impact block 5 are integrally machined. Furthermore, the output mechanism 2 also includes a torque sensor 6.

[0027] like Figure 3 As shown, the shaft 4 of the output mechanism 2 is provided with a receiving groove 7 for accommodating the torque sensor 6. In actual use, the impact block 5 rotates under the action of the electric impact wrench drive system. The impact block 5 drives the shaft 4 to rotate and outputs the torque to the outside through the output head 3. The torque sensor 6 measures the output torque to the outside in real time and outputs it to the electric impact wrench 1. The receiving groove 7 on the shaft 4 of the output mechanism 2 includes a circular part and a protruding part. The torque sensor 6 includes an elastic body 61, a sensitive element 62, and a flexible circuit board 63. The elastic body 61 is arranged along the circular part of the receiving groove. The sensitive element 62 is arranged on the elastic body 61. The sensitive element 62 can measure the physical signal of the slight deformation of the elastic body 61 under the action of torque and process the signal. In order to obtain accurate torque information, the sensitive elements 62 are evenly distributed or symmetrically arranged on the elastic body 61. The number of sensitive elements 62 is an integer multiple of 4, such as 4, 8, 12, etc. When the number of sensitive elements 62 is 4, the sensitive elements 62 are symmetrically arranged on the elastic body. The torque sensor 6 also includes a flexible circuit board 63, which is disposed in the annular portion of the receiving groove and electrically connected to the sensing element 62 for receiving information from the sensing element 62 and transmitting it to the electric impact wrench. The torque sensor 6 also includes a wire groove 64 for accommodating the cable output by the torque sensor, the wire groove 64 being located in the protruding portion of the receiving groove.

[0028] In addition, the output mechanism is equipped with a carbon brush slip ring 8, which is mounted on the shaft 4 and is used for electrical connection with the torque sensor 6. In one embodiment of this utility model, specifically, the carbon brush slip ring 8 is mounted on a groove and electrically connected to the flexible circuit board 63, used to receive the torque signal collected by the sensitive element 62 and to power the sensitive element 62. The carbon brush slip ring 8 includes an inner ring and an outer ring (not shown in the figure). The inner ring is fixedly connected to the shaft, and the outer ring is fixedly connected to the electric impact wrench. The inner ring and the outer ring can rotate relative to each other and are electrically connected. The inner ring is connected to the flexible circuit board 63 through a cable. During the process of the shaft 4 driving the torque sensor 6 to rotate, the inner ring rotates with the torque sensor 6. After the sensitive element 62 of the torque sensor 6 obtains the measurement information, it is connected to the inner ring of the carbon brush slip ring 8 through the flexible circuit board 63 and then transmitted to the electric impact wrench through the outer ring.

[0029] Furthermore, the output mechanism 2 is connected to the electric impact wrench to obtain the output torque of the electric impact wrench. Specifically, the impact block 5 of the output mechanism is provided with two protrusions for cooperating with the electric impact wrench to obtain the output torque of the electric impact wrench and transmit it to the output head.

[0030] In Embodiment 2 of this utility model, an electric impact wrench is disclosed, which includes the output mechanism described in Embodiment 1. By incorporating the output mechanism of Embodiment 1, the electric impact wrench in this embodiment possesses a torque detection function, enabling real-time detection of the output torque. This avoids problems of excessive or insufficient torque, significantly improving accuracy and operational efficiency.

[0031] In one embodiment of this utility model, the electric impact wrench 1 includes a transmission mechanism 11, which cooperates with an output mechanism 2 to transmit the output torque of the electric impact wrench to the output mechanism 2, thereby performing work on an external bolt. Specifically, the transmission mechanism 11 includes a transmission shaft 12, which cooperates with the impact block 5 of the output mechanism 2 to transmit the output torque of the transmission shaft 12 to the outside. The transmission shaft restricts the radial and axial movement of the impact block 5 of the output mechanism, allowing only circumferential movement of the output mechanism, thereby transmitting the output torque of the transmission shaft to the output head.

[0032] The electric impact wrench includes a housing 13, on which a support sleeve 14 is mounted. The support sleeve 14 supports the output mechanism 2 and restricts its axial and radial movement, ensuring the stability of the electric impact wrench's output. Specifically, a torque sensor 6 is fixed by passing through the support sleeve 14. The support sleeve 14 is rotatably connected to the output mechanism 2, supporting the torque sensor 6 and restricting its axial movement. This ensures the stability of the torque sensor 6 and improves its measurement accuracy.

[0033] Furthermore, the electric impact wrench also includes an input device 110 for inputting the operating mode and preset torque value of the electric impact wrench. By setting the input device, the user can select the torque function, choosing the appropriate operating mode and torque value according to actual needs, ensuring reliable and safe installation.

[0034] In addition, the electric impact wrench also includes a display device 120. Information input by the user through the input device 110 can be displayed on the display device 120. At the same time, the display device 120 can also be used to display the actual output torque value when using the electric impact wrench, helping the user to understand the output torque at a moment's notice. Then, by controlling the depth of pressing the electric impact wrench, the power of the drive system can be adjusted to quickly reach the preset torque value, thereby achieving pre-tightening of the bolt. It is simple, quick, and improves the ease of operation.

[0035] This invention incorporates a receiving groove in the output mechanism of an electric impact wrench near the output head to accommodate a torque sensor. The torque sensor is electrically connected to the electric impact wrench. By pre-inputting a preset torque value, and with the torque sensor detecting the torque information at the output head in real time and outputting it to the electric impact wrench, the torque output of the electric impact wrench is controlled. This avoids the problem of excessive or insufficient output torque, enabling the electric impact wrench with this output mechanism to achieve precise control of the output torque based on user input, thereby improving the accuracy and effectiveness of the electric impact wrench.

Claims

1. An output mechanism (2) for an electric impact wrench, characterized in that, It includes an output head (3), an impact block (5) and a torque sensor (6). The impact block (5) is used to receive the torque of the electric impact wrench and transmit it to the output head (3). The torque sensor (6) is used to measure the torque value output by the output head (3).

2. The output mechanism (2) according to claim 1, characterized in that, The output mechanism (2) includes a shaft (4), which is connected to the output head (3) and the impact block (5). The shaft (4) is provided with a receiving groove (7) for accommodating the torque sensor (6).

3. The output mechanism according to claim 2, characterized in that, The torque sensor (6) includes an elastomer (61) disposed in the receiving groove (7) for sensing the torque on the output head and deforming when subjected to torque.

4. The output mechanism according to claim 3, characterized in that, The torque sensor (6) includes a sensitive element (62) which is uniformly or symmetrically distributed on the elastic body (61) and is used to measure the deformation signal of the elastic body (61). The number of the sensitive elements (62) is an integer multiple of 4.

5. The output mechanism according to claim 4, characterized in that, The output mechanism (2) is also equipped with a carbon brush slip ring (8), which is mounted on the shaft (4) and is used to electrically connect with the torque sensor (6).

6. The output mechanism according to claim 5, characterized in that, The receiving groove (7) also includes a wire groove (64), which is adjacent to the receiving groove (7) and is used to accommodate the power line and signal cable connecting the carbon brush slip ring (8) and the torque sensor (6).

7. The output mechanism according to claim 6, characterized in that, The impact block (5) of the output mechanism (2) is provided with two protrusions for cooperating with the electric impact wrench to obtain the output torque of the electric impact wrench and transmit it to the output head.

8. An electric impact wrench comprising the output mechanism (2) according to any one of claims 1-7, characterized in that, It includes a transmission mechanism that works in conjunction with an output mechanism to transmit the output torque of the electric impact wrench to the output mechanism.

9. The electric impact wrench according to claim 8, characterized in that, Includes a housing (13), on which a support bushing (14) is provided. The support bushing (14) is used to support the output mechanism (2) and restrict the axial and radial movement of the output mechanism (2).

10. The electric impact wrench according to claim 9, characterized in that, The electric impact wrench also includes an input device (110) and a display device (120). The input device (110) is used to input the working mode and preset torque value of the electric impact wrench; the display device (120) is used to display the information input by the user and the working information of the electric wrench.

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