Torsion sensor structure and electric screwdriver using same

Abstract

The utility model provides a torsion sensor structure and an electric screwdriver using the same. The electric screwdriver comprises a shell, a motor, a main shaft and the torsion sensor structure. The torsion sensor structure is arranged on the outer ring of the spindle in a sleeving mode, the motor and the spindle achieve connection driving in the torsion sensor structure, and it is guaranteed that the spindle drives the screwdriver bit to rotate stably. The top end of the torsion sensor structure is connected with the rotating part, and the bottom end is connected with the shell. Warp-direction torsion data are collected through a strain device of a torsion sensor structure, the accuracy and reliability of the electric screwdriver in the using process are improved, and more efficient work is achieved. Torque force can be generated between the upper part of the torque sensor structure and the lower part of the sensor, so that the torque force can be effectively transmitted for detection, and energy loss and sensor displacement are avoided.

Description

Technical Field

[0001] The utility model relates to the field of electric screwdrivers, in particular to a torque sensor structure and an electric screwdriver using the structure. Background Art

[0002] An electric screwdriver, also known as an electric screwdriver or electric screwdriver, is an electric tool used to tighten and loosen screws and nuts. It is an indispensable tool in the assembly industry.

[0003] In traditional electric screwdrivers, sensors are usually installed at the output of the motor, which may cause a certain amount of force consumption and torque loss at the connection between the motor and the spindle, resulting in inaccurate torque detection results.

[0004] Therefore, it is necessary to provide a torque sensor structure and an electric screwdriver using the structure to solve the above technical problems. Utility Model Content

[0005] The utility model provides a torque sensor structure and an electric screwdriver using the structure, so as to solve the problem that the electric screwdriver sensor in the prior art is usually arranged at the output of the motor, there is a certain force consumption and torque loss at the connection between the motor and the main shaft, resulting in inaccurate torque detection results.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a torque sensor structure, the torque sensor structure is a hollow structure, and the torque sensor structure includes:

[0007] A first connection portion, located at the top of the torque sensor structure, the first connection portion being connected to the motor of the electric screwdriver;

[0008] A second connection portion, located at the bottom end of the torque sensor structure, the second connection portion is connected to the housing of the electric screwdriver; and

[0009] The deformation part is located in the middle of the torque sensor structure. The deformation part is sleeved on the outer ring of the main shaft of the electric screwdriver, and the cross-sectional diameter of the deformation part is smaller than the cross-sectional diameter of the first connecting part and the cross-sectional diameter of the second connecting part. The outer side of the deformation part is connected to the strain device.

[0010] In the present invention, the extension direction of the strain device is parallel to the extension direction of the line connecting the first connecting portion and the second connecting portion.

[0011] In the utility model, the top end of the first connection part is connected to the motor through a connection flange, and a plug-in slot is provided at the top end of the first connection part, and the plug-in slot is used for plugging the connection flange for connection.

[0012] In the utility model, a first screw hole is arranged on the outer side of the first connection part, the first screw hole is communicated with the plug-in slot, and the first connection part is connected to the connection flange through a second screw.

[0013] In the utility model, a first avoidance groove is arranged at the top of the first connecting portion, and the first avoidance groove is used to accommodate a first screw, and the first screw connects the connecting flange to the motor of the electric screwdriver.

[0014] In the utility model, a second connecting groove is arranged on the outer side of the second connecting portion, and the second connecting groove is connected to the housing of the electric screwdriver through a third screw.

[0015] In the utility model, a third connecting groove is arranged at the bottom end of the second connecting portion, and the third connecting groove is connected to the bottom end of the housing through a fourth screw.

[0016] In the utility model, a sealing groove is arranged on the outer side of the second connecting part, a sealing ring is embedded in the sealing groove, and the sealing ring seals and connects the second connecting part with the inner wall of the shell.

[0017] In the utility model, a fixing groove is arranged at the bottom end of the second connecting part, and a bearing assembly is arranged in the fixing groove and is rotatably connected to the main shaft of the electric screwdriver.

[0018] The utility model also provides an electric screwdriver, which comprises:

[0019] A shell, wherein a through hole is provided at the bottom end of the shell;

[0020] A motor is arranged in the housing, a rotating part is arranged at the bottom of the motor, and a driving shaft is arranged on the rotating part;

[0021] A spindle is disposed in the housing, one end of the spindle is connected to the drive shaft, and the other end of the spindle passes through the through hole and is connected to a bit; and

[0022] As described above, the torque sensor structure is arranged in the housing and sleeved on the outside of the main shaft. The top end of the torque sensor structure is connected to the rotating part, and the bottom end of the rotating part is connected to the housing.

[0023] Compared with the prior art, the utility model has the following beneficial effects: the utility model uses a torque sensor structure and an electric screwdriver using the structure, and the torque sensor is sleeved on the outer ring of the main shaft, and the motor and the main shaft are connected and driven inside the torque sensor structure, thereby avoiding force consumption and torque loss at the connection between the motor and the main shaft. The top end of the torque sensor structure is connected to the rotating part: through the connection with the rotating part, the torque sensor structure can directly contact and sense the torque force, thereby accurately collecting the longitudinal torque data. The bottom end of the torque sensor structure is connected to the outer shell: through the connection with the outer shell, the torque sensor structure maintains a stable position when the electric screwdriver is working, and will not be displaced or loosened, thereby ensuring the accuracy of the sensor's collection. Directly connecting the torque sensor structure to the main shaft and the rotating part achieves more accurate and reliable torque detection, avoiding the problem of inaccurate detection in traditional electric screwdrivers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the utility model.

[0025] Figure 1 It is a cross-sectional view of the overall structure of an electric screwdriver according to a preferred embodiment of the present utility model.

[0026] Figure 2 This is an exploded view of the electric screwdriver structure of a preferred embodiment of the utility model.

[0027] Figure 3 It is a structural schematic diagram of a torque sensor structure and a connecting flange according to a preferred embodiment of the utility model.

[0028] Figure 4 The figure is a schematic diagram of the overall structure of an electric screwdriver according to a preferred embodiment of the utility model.

[0029] 1. The outer shell; 111. The main shell; 1111. The third screw hole; 112. The front cover; 1121. The fourth screw hole; 113. The third screw; 114. The fourth screw; 12. The motor; 121. The rotating part; 1211. The driving shaft; 13. The main shaft; 131. The mounting groove; 14. The screw bit; 15. The torque sensor structure; 151. The first connecting part; 1511. The plug-in groove; 1512. The first avoidance groove; 152. The deformation part; 153. The second connecting part; 1531. The second connecting groove; 1533. The sealing groove; 16. The connecting flange; 161. The first fixing part; 1611. The second avoidance groove; 162. The second fixing part; 1622. The first groove; 1623. The second screw; 1624. The first screw; 17. The steel shaft; 18. The steel ring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0031] Directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used for reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, and are not used to limit the present invention.

[0032] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The following is a preferred embodiment of a torque sensor structure and an electric screwdriver using the structure provided by the present invention that can solve the above technical problems.

[0035] Please refer to Figure 1 and Figure 2 ,in Figure 1 This is a cross-sectional view of the overall structure of the electric screwdriver according to the preferred embodiment of the utility model. Figure 2 This is an exploded view of the electric screwdriver structure of a preferred embodiment of the utility model.

[0036] In the figures, structurally similar elements are denoted by the same reference numerals.

[0037] The utility model provides a torque sensor structure, which is a hollow cylindrical structure, wherein the torque sensor structure 15 includes a first connecting part 151, a second connecting part 153 and a deformation part 152; the first connecting part 151 is located at the top of the torque sensor structure 15, and the first connecting part 151 is connected to the motor 12 of the electric screwdriver; the second connecting part 153 is located at the bottom of the torque sensor structure 15, and the second connecting part 153 is connected to the outer shell 11 of the electric screwdriver; the deformation part 152 is located in the middle of the torque sensor structure 15, and the cross-sectional diameter of the deformation part 152 is smaller than the cross-sectional diameter of the first connecting part 151 and the cross-sectional diameter of the second connecting part 153, and the outer side of the deformation part 152 is connected to a strain device.

[0038] The extension direction of the strain device is parallel to the extension direction of the line between the first connecting portion 151 and the second connecting portion 152. The strain device in this embodiment is vertically mounted on the torque sensor structure 15. The strain device is based on the principle of torque and measures the torsion angle and elastic restoring force of the object when it is subjected to force to calculate the torque applied to the object.

[0039] The first connection part 151 is located at the top of the torque sensor structure 15, which is convenient for connecting to the motor 12 of the electric screwdriver. The second connection part 153 is located at the bottom of the torque sensor structure 15, which can be connected to the housing 11 of the electric screwdriver to increase the stability of the structure. The deformation part 152 is located in the middle of the torque sensor structure 15, and the measurement of torque is achieved by connecting the strain device on the outside. The cross-sectional diameter of the deformation part 152 is small, which can achieve more accurate torque measurement. Through the design of this electric screwdriver structure, accurate perception and measurement of torque can be achieved, and the accuracy and reliability of the sensor can be improved. Torque will be generated between the upper part of the torque sensor structure 15 and the lower part of the torque sensor structure, so that the torque can be effectively transmitted for detection, avoiding energy loss and sensor displacement.

[0040] The torque sensor structure 15 in this embodiment is described in detail as follows:

[0041] Combination Figure 2 and Figure 3 In this embodiment, the top of the first connecting portion 151 is connected to the motor 12 through the connecting flange 16. The top of the first connecting portion 151 is provided with a plug-in slot 1511, which is used to plug the connecting flange 16.

[0042] A first screw hole is disposed on the outer side of the first connection portion 151 . The first screw hole is communicated with the insertion slot 1511 . The first connection portion 151 is connected to the connection flange 16 via a second screw 1623 .

[0043] In this embodiment, a first avoidance groove 1512 is further provided at the top of the first connection portion 151, and the first avoidance groove 1512 is used to receive the first screw 1624 to improve the stability of the connection between the torque sensor structure 15 and the connection flange 16. The first screw 1624 connects the connection flange 16 to the motor 12 of the electric screwdriver.

[0044] A second connecting groove 1531 is disposed outside the second connecting portion 153, and the second connecting groove 1531 is connected to the housing 11 of the electric screwdriver through a third screw 113. A third screw hole 1111 is disposed on the side of the housing 11, and the torque sensor structure 15 is connected to the second connecting groove 1531 through the third screw 113 penetrating the third screw hole 1111, thereby improving the stability of the installation of the torque sensor structure 15.

[0045] In the present invention, a third connecting groove is provided at the bottom end of the second connecting portion 153 , and the third connecting groove is connected to the bottom end of the housing 11 through a fourth screw 114 .

[0046] In this embodiment, a sealing groove 1533 is further provided on the outer side of the second connection part 153 of the torque sensor structure 15. The sealing groove 1533 is used to embed a sealing ring to improve the sealing and stability of the connection between the bottom end of the torque sensor structure 15 and the outer shell 11; the sealing ring seals the second connection part 153 and the inner wall of the outer shell 11.

[0047] like Figure 1 As shown, the bottom end of the second connecting portion 153 in the utility model is provided with a fixing groove, and a bearing assembly is provided in the fixing groove to be rotatably connected with the main shaft of the electric screwdriver. Preferably, in this embodiment, the inner ring of the torque sensor structure 15 is also provided with a first fixing groove 1534 and a second fixing groove 1535, the first fixing groove 1534 is located above the second fixing groove 1535, and the cross-sectional diameter of the first fixing groove 1534 is less than or equal to the cross-sectional diameter of the second fixing groove 1535.

[0048] The bearing assembly is a horizontal bearing assembly 191 and a longitudinal bearing assembly 192; the horizontal bearing assembly 191 is sleeved outside the main shaft 13, and the horizontal bearing assembly 191 is located above the longitudinal bearing assembly 192, and the horizontal bearing assembly 191 rotatably connects the top surface of the main shaft 13 with the top wall of the first fixed groove 1534; the longitudinal bearing assembly 192 is sleeved outside the main shaft 13, and the longitudinal bearing assembly 192 rotatably connects the outer surface of the main shaft 13 with the side wall of the second fixed groove 1535. Through the arrangement of the horizontal bearing assembly 191 and the longitudinal bearing assembly 192, stable transmission between the main shaft 13 and the torque sensor structure 15 can be achieved.

[0049] Please refer to Figure 1 and Figure 4 ,in Figure 1 The figure is a schematic diagram of the overall structure of an electric screwdriver according to a preferred embodiment of the utility model. Figure 2It is a cross-sectional view of the overall structure of an electric screwdriver according to a preferred embodiment of the present utility model.

[0050] The utility model provides an electric screwdriver, which includes a shell 11, a motor 12, a spindle 13 and a torque sensor structure 15; wherein, a through hole is provided at the bottom end of the shell 11, the motor 12 is arranged in the shell 11, a rotating part 121 is provided at the bottom end of the motor 12, and the rotating part 121 is provided with a driving shaft 1211; the spindle 13 is arranged in the shell 11, one end of the spindle 13 is connected to the driving shaft 1211, the other end of the spindle 13 passes through the through hole, and is connected with a screwdriver head 14; the torque sensor structure 15 is a hollow cylindrical structure, and a strain device is provided in the middle of the torque sensor structure 15, and the strain device is used to collect longitudinal torque data.

[0051] The structure of the torque sensor structure 15 in this embodiment is the same as that in the above embodiment. The torque sensor structure 15 is sleeved on the outer ring of the main shaft 13, the top end of the torque sensor structure 15 is connected to the rotating part 121, and the bottom end of the torque sensor structure 15 is connected to the housing 11.

[0052] The setting of the torque sensor structure 15 enables the electric screwdriver to collect longitudinal torque data in real time, and can accurately monitor and record the torque size during the use of the electric screwdriver. The torque sensor structure 15 is sleeved on the outer ring of the main shaft 13, and the motor 12 and the main shaft 13 are connected and driven inside the torque sensor structure 15 to ensure that the main shaft 13 drives the screwdriver head 14 to rotate stably; the top of the torque sensor structure 15 is connected to the rotating part 121, and the bottom is connected to the housing 11, with a tight structural connection; torque will be generated between the upper part of the torque sensor structure 15 and the lower part of the sensor, so that the torque can be effectively transmitted for detection, avoiding energy loss and sensor displacement.

[0053] The electric screwdriver has key components such as a housing 11, a motor 12, a main shaft 13 and a torque sensor structure 15, which can meet the normal use requirements of the electric screwdriver and ensure that the sensor accurately collects and transmits torque data. The strain device of the torque sensor structure collects the meridional torque data, which improves the accuracy and reliability of the electric screwdriver during use and achieves more efficient work.

[0054] The electric batch structure in this embodiment is described in detail as follows:

[0055] Combination Figure 2 and Figure 3 The electric screwdriver in this embodiment further includes a connecting flange 16 , the bottom end of the connecting flange 16 is connected to the top of the torque sensor structure 15 , and the top end of the connecting flange 16 is connected to the rotating part 121 .

[0056] Combination Figure 3 and Figure 4, the structure of the torque sensor structure 15 is described:

[0057] The torque sensor structure 15 includes a first connection part 151, a second connection part 153 and a deformation part 152; the first connection part 151 is located at the top of the torque sensor structure 15, and the first connection part 151 is connected to the connection flange 16; the second connection part 153 is located at the bottom of the torque sensor structure 15, and the second connection part 153 is connected to the housing 11; the deformation part 152 is located in the middle of the torque sensor structure 15, and the cross-sectional diameter of the deformation part 152 is smaller than the cross-sectional diameter of the first connection part 151 and the cross-sectional diameter of the second connection part 153, and the outer side of the deformation part 152 is connected to the strain device.

[0058] The first connection part 151 is provided with a plug-in slot 1511; the connection flange 16 includes a first fixing part 161 and a second fixing part 162; the first fixing part 161 is plugged into the plug-in slot 1511, and the first fixing part 161 is connected to the first connection part 151; the second fixing part 162 is located above the first connection part 151, and the second fixing part 162 is connected to the rotating part 121. In this embodiment, the first connection part 151 is further connected to the first fixing part 161 of the connection flange 16 by a second screw 1623, which improves the stability of the connection between the connection flange 16 and the torque sensor structure 15.

[0059] Furthermore, the second fixing portion 162 is connected to the rotating portion 121 by a first screw 1624, which facilitates the disassembly and assembly of the torque sensor structure 15 and the connecting flange 16. A first avoidance groove 1512 is also provided at the top of the first connecting portion 151, and the first avoidance groove 1512 is used to accommodate the first screw 1624, thereby improving the stability of the connection between the torque sensor structure 15 and the connecting flange 16.

[0060] In this embodiment, the first fixing portion 161 is provided with a second avoidance groove 1611, and the second avoidance groove 1611 is spliced ​​with the first avoidance groove 1512, so as to engage the first screw 1624, thereby improving the contact surface between the first connecting portion 151 and the connecting flange 16 connected by the first screw 1624, and the structural connection is more stable.

[0061] In this embodiment, the second fixing portion 162 is provided with a first groove 1622 on its circumference, and the electric screwdriver further includes a steel shaft 17, which is disposed in the first groove 1622, and one side of the outer surface of the steel shaft 17 is in contact with the inner wall of the housing 11, thereby ensuring the stability of the connection flange 16 in rotating relative to the housing 11. Preferably, the outer ring of the second fixing portion 162 is sleeved with a steel ring 18, and the steel shaft 17 moves relative to the steel ring 18, and the steel ring 18 prevents the housing 11 from being deformed, thereby affecting the detection accuracy of the torque sensor structure 15.

[0062] In this embodiment, a mounting groove 131 is provided at the top of the main shaft 13, and the drive shaft 1211 is plugged into the mounting groove 131, which facilitates the assembly of the torque sensor structure 15 and the main shaft 13. In this embodiment, the cross section of the mounting groove 131 can be a polygonal structure such as a triangle or a quadrilateral, and the cross-sectional structure of the drive shaft 1211 matches the cross-sectional structure of the mounting groove 131, which improves the stability of the plugging of the main shaft 13 and the mounting groove 131 and avoids the wear error between the main shaft 13 and the drive shaft 1211.

[0063] Combination Figure 1 , Figure 3 and Figure 4 , the connection structure between the torque sensor structure 15 and the housing 11 in this embodiment:

[0064] In this embodiment, a second connecting groove 1531 is provided on the outer side of the second connecting portion 153, and a third screw hole 1111 is provided on the side of the outer shell 11. The torque sensor structure 15 is connected to the second connecting groove 1531 by a third screw 113 passing through the third screw hole 1111, thereby improving the installation stability of the torque sensor structure 15.

[0065] Furthermore, the housing 11 in this embodiment includes a main housing 111 and a front cover 112; the main housing 111 is a hollow cylindrical structure, the bottom end of the main housing 111 is provided with an opening, the motor 12 is located in the main housing 111, and the third screw hole 1111 is located on the peripheral side of the main housing 111; the front cover 112 is connected to the main housing 111, and the front cover 112 is used to close the opening; wherein, the bottom end of the torque sensor structure 15 is provided with a third connection groove, the front cover 112 is provided with a fourth screw hole 1121, the torque sensor structure 15 passes through the fourth screw hole 1121 through the fourth screw 114, and is connected to the third connection groove. The bottom end of the torque sensor structure 15 is connected to the front cover 112, which improves the contact surface between the torque sensor structure 15 and the housing 11, and ensures the accuracy of the torque sensor structure 15 detection.

[0066] In addition, a sealing groove 1533 is further provided on the outer side of the second connection portion 153 of the torque sensor structure 15 in this embodiment. The sealing groove 1533 is used to embed a sealing ring to improve the sealing and stability of the connection between the bottom end of the torque sensor structure 15 and the housing 11 .

[0067] The working principle of the electric screwdriver of the utility model:

[0068] 1. In the torque sensor structure 15 of this embodiment, the deformation part 152 of the torque sensor structure 15 is an elastic element, the deformation part 152 is installed with a strain device, and the position of the deformation part 152 corresponds to the outer ring position of the main shaft 13.

[0069] 2. The upper part of the torque sensor structure 15 is connected to the output part of the motor 12 through the connecting flange 16.

[0070] 3. The lower part of the torque sensor structure 15 is connected to the housing 11, and the strain device installed on the deformation part 152 can detect the torque difference between the upper and lower parts of the sensor.

[0071] 4. During use, the user holds the outer shell 11 of the electric screwdriver and engages the screwdriver bit 14 at the bottom of the electric screwdriver with the screw to be disassembled and assembled; then starts the electric screwdriver switch, and the motor 12 and the spindle 13 in the electric screwdriver are connected and driven inside the torque sensor structure 15, so that the screwdriver bit 14 rotates to disassemble and assemble the screw.

[0072] The rotational force of the motor 12 is transmitted to the upper part of the torque sensor structure 15 through the connecting flange 16, so that torque is generated between the upper part of the torque sensor structure 15 and the lower part of the torque sensor structure 15, so as to detect the torque of the electric screwdriver during the process of disassembling and installing screws.

[0073] This completes the working process of the torque sensor structure of this preferred embodiment.

[0074] Torque sensors are widely used in the industrial field to monitor and control the torque output of various mechanical equipment. The main invention of this application lies in the connection of the torque sensor structure, and its detection principle will not be elaborated here.

[0075] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A torque sensor structure, characterized in that: The torque sensor structure is a hollow structure, and the torque sensor structure includes: A first connection portion, located at the top of the torque sensor structure, the first connection portion being connected to the motor of the electric screwdriver; A second connection portion, located at the bottom end of the torque sensor structure, the second connection portion is connected to the housing of the electric screwdriver; and The deformation part is located in the middle of the torque sensor structure. The deformation part is sleeved on the outer ring of the main shaft of the electric screwdriver, and the cross-sectional diameter of the deformation part is smaller than the cross-sectional diameter of the first connecting part and the cross-sectional diameter of the second connecting part. The outer side of the deformation part is connected to the strain device.

2. The torque sensor structure according to claim 1, characterized in that: An extension direction of the strain device is parallel to an extension direction of a line connecting the first connecting portion and the second connecting portion.

3. The torque sensor structure according to claim 1, characterized in that: The top end of the first connection part is connected to the motor via a connection flange. The top end of the first connection part is provided with a plug-in slot, and the plug-in slot is used for plugging the connection flange for connection.

4. The torque sensor structure according to claim 3, characterized in that: A first screw hole is arranged on the outer side of the first connection part, the first screw hole is communicated with the plug-in slot, and the first connection part is connected to the connection flange through a second screw.

5. The torque sensor structure according to claim 1, characterized in that: A first avoidance groove is provided at the top of the first connecting portion, and the first avoidance groove is used to accommodate a first screw, and the first screw connects the connecting flange to the motor of the electric screwdriver.

6. The torque sensor structure according to claim 1, characterized in that: A second connecting groove is arranged on the outer side of the second connecting portion, and the second connecting groove is connected to the housing of the electric screwdriver through a third screw.

7. The torque sensor structure according to claim 1, characterized in that: A third connecting groove is provided at the bottom end of the second connecting portion, and the third connecting groove is connected to the bottom end of the housing through a fourth screw.

8. The torque sensor structure according to claim 1, characterized in that: A sealing groove is arranged outside the second connection part, a sealing ring is embedded in the sealing groove, and the sealing ring seals and connects the second connection part with the inner wall of the housing.

9. The torque sensor structure according to claim 1, characterized in that: A fixing groove is arranged at the bottom end of the second connecting portion, and a bearing assembly is arranged in the fixing groove and is rotatably connected to the main shaft of the electric screwdriver.

10. An electric screwdriver, characterized in that: include: A shell, wherein a through hole is provided at the bottom end of the shell; A motor is arranged in the housing, a rotating part is arranged at the bottom of the motor, and a driving shaft is arranged on the rotating part; A spindle is disposed in the housing, one end of the spindle is connected to the drive shaft, and the other end of the spindle passes through the through hole and is connected to a bit; and According to the torque sensor structure as described in any one of claims 1 to 9, the torque sensor structure is arranged in the housing and is sleeved on the outside of the main shaft, the top end of the torque sensor structure is connected to the rotating part, and the bottom end of the rotating part is connected to the housing.

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