Torsion adjusting device

Abstract

A torsion adjusting device comprises a shell which is provided with a containing hole, and the outer side of the shell is provided with a connecting part connected with external equipment; the rotating shaft and the shell are coaxially arranged, and the rotating shaft is inserted into the accommodating hole; the magnet and the shell are coaxially arranged, the magnet is slidably arranged in the containing hole, the magnet and the rotating shaft are slidably connected in the axial direction of the rotating shaft, and the rotating shaft can drive the magnet to rotate around the axis of the magnet; the friction piece is arranged at one end of the magnet away from the rotating shaft; the rotating assembly and the shell are coaxially arranged, the rotating assembly is rotationally connected to the shell, the rotating assembly abuts against the friction piece, and a chuck is arranged on the side, away from the friction piece, of the rotating assembly; the screwdriver head is detachably connected to the chuck; and the magnetic coil is sleeved on the shell and is coaxial with the magnet. According to the torsion adjusting device, the rotating shaft drives the magnet and the friction piece to rotate, then the rotating assembly and the screwdriver head are driven to rotate, the acting force applied to the rotating assembly by the friction piece can be adjusted by adjusting the magnetic force of the magnetic coil, then the torsion of the screwdriver head is adjusted, and the adjusting precision is high.

Description

Technical Field

[0001] This application relates to the field of processing and assembly technology, specifically to a torque adjustment device. Background Technology

[0002] In the field of machining and assembly, fastening multiple parts together with screws is a common assembly method, and currently, electric wrenches are typically used for screw installation. During actual machining and assembly, to ensure the screws are tightened to the appropriate degree, the torque of the electric wrench needs to be set before assembly to avoid insufficient torque leading to loose screws or excessive torque causing damage to parts. In the manufacturing and processing of electronic products, there are many types of screws that need to be assembled, each requiring a specific torque that needs to be precisely set. Currently used electric wrenches have slow torque adjustment operations and insufficient torque adjustment precision. Utility Model Content

[0003] In view of the above, it is necessary to propose a torque adjustment device that drives the magnet and friction component to rotate via a rotating shaft, which in turn drives the rotating assembly and screwdriver head to rotate via the friction component. By adjusting the magnetic force of the magnetic coil, the force exerted by the magnet and friction component on the rotating assembly is adjusted, thereby quickly adjusting the torque of the screwdriver head with high precision.

[0004] This application provides a torque adjustment device, comprising: a housing having a receiving hole arranged axially along the housing and passing through the upper and lower ends of the housing, and a connecting part for fixed connection with an external device provided on the outer side of the housing; a rotating shaft coaxially arranged with the housing and one end of the rotating shaft inserted into the receiving hole; a magnet coaxially arranged with the housing and slidably disposed in the receiving hole, the magnet and the rotating shaft being slidably connected along the axial direction of the rotating shaft, and the rotating shaft being able to drive the magnet to rotate around the axis of the magnet; a friction element coaxially arranged with the magnet and disposed at the end of the magnet away from the rotating shaft; and a rotating assembly coaxially arranged with the housing, wherein... The rotating assembly is rotatably connected to the end of the housing away from the rotating shaft and covers the receiving hole. The rotating assembly abuts against the friction member. A chuck coaxially arranged with the housing is provided on the side of the rotating assembly away from the friction member. A screwdriver head is detachably connected to the chuck. A magnetic coil is sleeved on the housing and coaxially arranged with the magnet. The rotating shaft is connected to an external driving device to drive the magnet and the friction member to rotate. When the magnetic coil is energized, it generates magnetic force to drive the magnet to move along the axial direction of the magnet, thereby driving the friction member to abut against the rotating assembly, and thus driving the rotating assembly and the screwdriver head to rotate.

[0005] The aforementioned torque adjustment device has a housing connected to an external device for support, and a rotating shaft connected to an external drive device to transmit rotational power. The rotating shaft drives a magnet to rotate, which in turn drives a friction element to rotate. When the friction element contacts the rotating assembly, it drives the rotating assembly to rotate, which in turn drives the screwdriver head to rotate, thereby tightening or loosening screws. A magnetic coil generates magnetic force, which drives the magnet to move axially toward the rotating assembly, causing the friction element to contact the rotating assembly. The magnetic force generated by the magnetic coil is proportional to the friction between the friction element and the rotating assembly, meaning it is proportional to the torque of the screwdriver head. By adjusting the magnitude of the magnetic force generated by the magnetic coil, the torque of the screwdriver head can be controlled. Since the magnetic force generated by the magnetic coil is related to the current in the magnetic coil, the torque of the screwdriver head can be controlled by controlling the current, resulting in high adjustment precision.

[0006] In some embodiments, the torque adjustment device further includes a controller electrically connected to the magnetic coil, the controller controlling the magnetic force generated by the magnetic coil to control the force between the friction element and the rotating assembly, thereby adjusting the torque of the screwdriver head.

[0007] In some embodiments, the torque adjusting device further includes a first bearing connected to the housing, the outer ring of the first bearing being fixedly connected to the housing, and the inner ring of the first bearing being sleeved on the rotating shaft.

[0008] In some embodiments, a sliding groove is provided at one end of the magnet opposite to the rotating shaft. The cross-section of the sliding groove is polygonal. The rotating shaft is slidably inserted into the sliding groove at one end of the receiving hole, and the cross-section of the rotating shaft at one end of the receiving hole is a polygon adapted to the sliding groove.

[0009] In some embodiments, a snap-fit ​​protrusion is provided at one end of the magnet connected to the friction member. The snap-fit ​​protrusion has a polygonal cross-section. A snap-fit ​​groove is provided on one side of the friction member connected to the magnet. The snap-fit ​​groove has a polygonal cross-section that matches the snap-fit ​​protrusion. The snap-fit ​​protrusion is inserted into the snap-fit ​​groove to connect the magnet and the friction member.

[0010] In some embodiments, the housing includes an outer shell and a sliding sleeve disposed within the outer shell, the connecting portion is disposed within the outer shell, the receiving hole penetrates the outer shell and the sliding sleeve, and the magnet is disposed within the sliding sleeve.

[0011] In some embodiments, the rotating assembly includes a rotating sleeve rotatably connected to the sliding sleeve and an end cap connected to the rotating sleeve. The rotating sleeve is rotatably connected to the end of the sliding sleeve away from the rotating shaft. The end cap is detachably connected to the rotating sleeve. The end of the end cap facing the sliding sleeve is disposed opposite to the friction member. The clamp is disposed on the side of the end cap away from the friction member.

[0012] In some embodiments, the torque adjusting device further includes a second bearing sleeved on one end of the sliding sleeve near the end cover, wherein the inner ring of the second bearing is connected to the sliding sleeve and the outer ring of the second bearing is connected to the rotating sleeve.

[0013] In some embodiments, the side of the friction element facing the end cap is configured as a planar or conical surface, and the side of the end cap facing the friction element is configured as a planar or conical surface adapted to the friction element.

[0014] In some embodiments, the torque adjustment device further includes a protective sleeve disposed on the outside of the housing and covering the magnetic coil. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the torque adjustment device provided in an embodiment of this application.

[0016] Figure 2 for Figure 1 The torque adjustment device shown is a cross-sectional view along the II-II direction.

[0017] Figure 3 for Figure 1 The diagram shows the exploded structure of the torque adjustment device.

[0018] Explanation of main component symbols: Torque adjustment device 100, housing 10, receiving hole 11, connecting part 12, outer shell 13, sliding sleeve 14, rotating shaft 20, first bearing 30, magnet 40, sliding groove 41, snap-fit ​​protrusion 42, friction element 50, snap-fit ​​groove 51, rotating assembly 60, rotating sleeve 61, end cover 62, chuck 621, second bearing 70, screwdriver head 80, magnetic coil 90, controller 110, protective sleeve 120. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0023] Please see Figure 1 , Figure 2 and Figure 3 This application provides a torque adjustment device 100 for tightening or loosening screws. The torque adjustment device 100 includes a housing 10, a rotating shaft 20 rotatably connected to the housing 10, a first bearing 30 sleeved on the rotating shaft 20 and connected to the housing 10, a magnet 40 disposed inside the housing 10, a friction element 50 connected to the magnet 40, a rotating assembly 60 rotatably connected to the housing 10, a second bearing 70 sleeved on the housing 10 and connected to the rotating assembly 60, a screwdriver head 80 detachably connected to the rotating assembly 60, and a magnetic coil 90 sleeved on the outside of the housing 10.

[0024] Please see Figure 1 and Figure 2In this embodiment, the housing 10 has receiving holes 11 extending axially through the upper and lower ends of the housing 10, and a block-shaped connecting part 12 for fixed connection with an external device (not shown) is provided on the outer side of the housing 10. The housing 10 includes an outer shell 13 and a sliding sleeve 14 disposed within the outer shell 13. The connecting part 12 is disposed on the outer shell 13, and the receiving hole 11 penetrates the outer shell 13 and the sliding sleeve 14. The outer shell 13 has a hollow cylindrical structure. The connecting part 12 is fixedly connected to the external device, such as a frame or robotic arm, by bolts. To further improve the stability of the housing 10, in this embodiment, two connecting parts 12 are provided on the outer shell 13, and the two connecting parts 12 are fixedly connected to the external device respectively. The sliding sleeve 14 has a hollow cylindrical structure and is fixedly connected to the outer shell 13. Since the magnet 40 is housed within the housing 10, the housing 10 is made of a non-magnetic material. To improve the structural strength of the outer shell 13, it is made of metallic materials such as titanium alloy or aluminum alloy, while the sliding sleeve 14 is made of materials such as ceramic. It is understood that the magnet 40 will rub against the inner wall of the sliding sleeve 14 when it rotates within it; therefore, the inner wall of the sliding sleeve 14 is designed as a smooth surface. The housing 10, composed of the outer shell 13 and the sliding sleeve 14, ensures the structural strength of the housing 10 while facilitating the replacement of the sliding sleeve 14, thus reducing maintenance costs.

[0025] Please see Figure 1 , Figure 2 and Figure 3 The rotating shaft 20 is coaxially arranged with the housing 10, and one end of the rotating shaft 20 is inserted into the receiving hole 11. The end of the rotating shaft 20 extending out of the housing 10 is connected to an external drive device (not shown in the figure). The external drive device is a rotary motor or the like, and the external drive device drives the rotating shaft 20 to rotate around its axis. The cross-section of the rotating shaft 20 at the end of the receiving hole 11 is polygonal, such as a regular hexagon, or a triangle, quadrilateral, pentagon, etc.

[0026] The torque adjustment device 100 also includes a first bearing 30 connected to the housing 10. The outer ring of the first bearing 30 is fixedly connected to the housing 10, and the inner ring of the first bearing 30 is sleeved on the rotating shaft 20. In this embodiment, the outer ring of the first bearing 30 is fixedly connected to the outer shell 13 of the housing 10. By setting the first bearing 30, the friction between the rotating shaft 20 and the outer shell 13 during rotation can be effectively reduced. Without a bearing, the rotating shaft 20 directly contacts and rotates with the housing 10. Due to the large coefficient of friction, a large frictional force will be generated, which will not only make the rotation of the rotating shaft 20 uneven but may also lead to wear on the rotating shaft 20 and the housing 10. After setting the first bearing 30, the rotating shaft 20 rotates relatively smoothly in the inner ring of the first bearing 30, which allows the power transmitted to the rotating shaft 20 by the external drive device to be utilized more efficiently, reducing energy loss on unnecessary friction, thereby ensuring the smoothness and stability of the rotation of the rotating shaft 20. The first bearing 30 ensures that the rotating shaft 20 rotates precisely in a predetermined manner and will not jam or deviate due to friction interference, thus providing a guarantee for the entire torque adjustment device 100 to achieve precise torque adjustment.

[0027] The magnet 40 is coaxially arranged with the housing 10 and slidably disposed in the receiving hole 11. The magnet 40 is slidably connected to the rotating shaft 20 along the axial direction of the rotating shaft 20, and the rotating shaft 20 can drive the magnet 40 to rotate around the axis of the magnet 40. The magnet 40 is disposed in the sliding sleeve 14. The end of the magnet 40 connected to the rotating shaft 20 is provided with a sliding groove 41 to accommodate the rotating shaft 20 therein. The cross-section of the sliding groove 41 is polygonal. The end of the magnet 40 away from the rotating shaft 20 is provided with a snap-fit ​​protrusion 42, the cross-section of the snap-fit ​​protrusion 42 being polygonal. The magnet 40 has a cylindrical structure and can rotate around the axis of the magnet 40 and slide along the axis of the magnet 40 within the receiving hole 11. One end of the rotating shaft 20, which is disposed within the receiving hole 11, is disposed within the sliding groove 41. The cross-sectional structure of the sliding groove 41 is adapted to the cross-sectional structure of the end of the rotating shaft 20 disposed within the sliding groove 41, and is a regular hexagon, or a triangle, quadrilateral, pentagon, etc. Thus, when the rotating shaft 20 rotates, the rotating shaft 20 drives the magnet 40 to rotate within the receiving hole 11. In this embodiment, the cross-section of the snap-fit ​​protrusion 42 is a regular hexagon, or a triangle, quadrilateral, pentagon, etc.

[0028] The friction element 50 is coaxially arranged with the housing 10 and located at the end of the magnet 40 away from the rotating shaft 20. A snap-fit ​​groove 51 is provided on the side of the friction element 50 that connects to the magnet 40. The cross-section of the snap-fit ​​groove 51 is a polygon adapted to the snap-fit ​​protrusion 42. The snap-fit ​​protrusion 42 is inserted into the snap-fit ​​groove 51 to connect the magnet 40 and the friction element 50. The side of the friction element 50 facing away from the magnet 40 is a flat or conical surface. The material of the friction element 50 is powder metallurgy, etc. The snap-fit ​​protrusion 42 is located at the end of the magnet 40 that connects to the friction element 50. This allows the snap-fit ​​protrusion 42 to be inserted into the snap-fit ​​groove 51, making the connection between the magnet 40 and the friction element 50 tighter and more stable, thereby improving the stability of the magnet 40 driving the friction element 50 to rotate. The connection method of the snap-fit ​​protrusion 42 and the snap-fit ​​groove 51 is convenient for installing and disassembling the magnet 40 and the friction component 50. During the assembly process, the magnet 40 and the friction component 50 can be connected smoothly by simply aligning the snap-fit ​​protrusion 42 with the snap-fit ​​groove 51, without the need for complicated tools or additional connecting structures. When it is necessary to maintain the device or replace parts, the magnet 40 and the friction component 50 can also be separated relatively easily, which helps to reduce maintenance costs and time.

[0029] The rotating component 60 is coaxially arranged with the housing 10. The rotating component 60 is rotatably connected to the end of the housing 10 away from the rotating shaft 20 and covers the receiving hole 11. The rotating component 60 abuts against the friction member 50.

[0030] The rotating assembly 60 has a chuck 621 coaxially arranged with the housing 10 on the side opposite to the friction member 50. The rotating assembly 60 includes a rotating sleeve 61 rotatably connected to the sliding sleeve 14 and an end cap 62 connected to the rotating sleeve 61. The rotating sleeve 61 is rotatably connected to the end of the sliding sleeve 14 away from the rotating shaft 20. The end cap 62 is detachably connected to the rotating sleeve 61. The end of the end cap 62 facing the sliding sleeve 14 is opposite to the friction member 50. The side of the end cap 62 facing the friction member 50 is set as a plane or conical surface adapted to the friction member 50. The chuck 621 is located on the side of the end cap 62 opposite to the friction member 50.

[0031] The rotating sleeve 61 is a hollow cylindrical structure, fitted onto the sliding sleeve 14 and rotatably connected to it. The end cap 62 is a single-end open hollow cylindrical structure, threadedly connected to the rotating sleeve 61. When the friction element 50 rotates, friction causes the end cap 62 and the rotating sleeve 61 to rotate. The end cap 62 and the rotating sleeve 61 are detachably connected, facilitating the inspection and maintenance of the internal structure of the housing 10. Furthermore, when it is necessary to replace the screwdriver bit 80 with another size, the end cap 62 with a different chuck 621 can be quickly replaced.

[0032] The torque adjustment device 100 also includes a second bearing 70 sleeved on one end of the sliding sleeve 14 near the end cover 62. The inner ring of the second bearing 70 is connected to the sliding sleeve 14, and the outer ring of the second bearing 70 is connected to the rotating sleeve 61. By setting the second bearing 70, the rotational performance between the rotating sleeve 61 and the sliding sleeve 14 can be significantly optimized. The rotating sleeve 61 rotates relatively smoothly in the outer ring of the bearing, reducing energy loss in unnecessary friction, thereby ensuring the smoothness and stability of the rotation of the rotating sleeve 61.

[0033] The screwdriver bit 80 is detachably connected to the collet 621, which makes it easy to replace different types of screwdriver bits 80 according to actual usage needs, such as Phillips head, slotted head, hex head and other specifications of screwdriver bits 80, to adapt to the disassembly or installation of different screws.

[0034] A magnetic coil 90 is fitted onto the housing 10 and positioned opposite the magnet 40. When the magnetic coil 90 is energized, it generates a magnetic force. Since the magnetic coil 90 and magnet 40 are opposite each other, the generated magnetic force drives the magnet 40 to move axially. This axial movement of the magnet 40 causes the friction element 50 to abut against the end cap 62. When the rotating shaft 20 rotates under the drive of an external drive device, the magnet 40 and friction element 50 also rotate. After the friction element 50 abuts against the rotating assembly 60, it transmits the rotational motion to the rotating assembly 60, ultimately driving the screwdriver head 80 to rotate. By controlling the magnitude of the magnetic force generated by the magnetic coil 90, the axial force exerted by the magnet 40 against the end cap 62 can be adjusted, thereby controlling the force between the friction element 50 and the rotating assembly 60, and thus adjusting the torque of the screwdriver head 80. For example, increasing the magnetic force of the magnetic coil 90 increases the axial force exerted by the magnet 40 on the friction element 50, increases the friction between the friction element 50 and the rotating assembly 60, and correspondingly increases the torque transmitted to the screwdriver head 80.

[0035] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3The housing 11, rotating shaft 20, magnet 40, friction element 50, rotating assembly 60, and screwdriver head 80 are coaxially arranged. The rotating shaft 20 is connected to an external drive device to drive the magnet 40 and friction element 50 to rotate. The magnetic coil 90 generates magnetic force to drive the magnet 40 to move axially, thereby causing the friction element 50 to abut against the rotating assembly 60, which in turn drives the rotating assembly 60 and screwdriver head 80 to rotate. The coaxial arrangement ensures that the various components maintain good concentricity during rotation. For example, when the rotating shaft 20 rotates under the drive of the external drive device, because it is coaxial with the magnet 40, it can accurately transmit the rotational motion to the magnet 40. The magnet 40 is connected to the friction element 50, and the friction element 50 is opposite to the rotating assembly 60. This coaxial layout allows the rotational motion to be transmitted effectively and sequentially, ultimately driving the screwdriver head 80 to rotate stably.

[0036] The magnetic coil 90 generates a magnetic force that drives the magnet 40 to move axially, which in turn causes the friction element 50 to press against the rotating assembly 60. By controlling the magnitude of the magnetic force of the magnetic coil 90, the friction between the friction element 50 and the rotating assembly 60 can be adjusted. This adjustment of friction directly affects the torque transmitted to the screwdriver head 80. In precision operation scenarios requiring lower torque, such as disassembling screws in small electronic devices, the magnetic force of the magnetic coil 90 can be reduced, resulting in lower friction between the friction element 50 and the rotating assembly 60, and thus lower torque for the screwdriver head 80. Conversely, in scenarios requiring higher torque, such as installing screws on large machinery, the magnetic force of the magnetic coil 90 can be increased, increasing the friction and allowing the screwdriver head 80 to obtain greater torque.

[0037] The torque adjustment device 100 also includes a controller 110 electrically connected to the magnetic coil 90. The controller 110 controls the force between the friction member 50 and the rotating assembly 60 by controlling the magnetic force generated by the magnetic coil 90, thereby adjusting the torque of the screwdriver head 80. The controller 110 is a microprocessor or similar device, and its internal components include a D / A (8-bit) chip (Digital-to-Analog Conversion) for controlling the current in the magnetic coil 90. The D / A (8-bit) chip can decompose the current into 256 values, thereby precisely controlling the magnitude of the magnetic force generated by the magnetic coil 90.

[0038] In this embodiment, the formula for calculating the relationship between torque and current is:

[0039] T=KI, where K=0.1μBLd;

[0040] The derivation process is as follows:

[0041] Given T = 0.1 μFd, F = BLI;

[0042] Therefore, T = 0.1μBLId = 0.1μBLd × I = KI, K = 0.1μBLd.

[0043] Where T is the torque, K is the proportionality coefficient of torque and current, I is the current, 0.1 is the disk friction conduction coefficient, μ is the friction coefficient, B is the magnetic field strength, L is the coil length, d is the radius of the friction element 50, and F is the pressure.

[0044] By adjusting the current I of the magnetic coil 90 through the controller 110, the torque T can be adjusted with high precision. The current I is controlled by a D / A (8-bit) chip, which can achieve a precision adjustment range of 1 / 256, thereby realizing high-precision real-time control of small torque.

[0045] The torque regulating device 100 also includes a protective sleeve 120, which is disposed on the outside of the housing 10 and covers the magnetic coil 90. The protective sleeve 120 can effectively prevent the magnetic coil 90 from being damaged by external physical factors, improve the safety of the entire device, reduce safety hazards, and ensure the safety of operators.

[0046] The torque adjustment device 100 provided in this embodiment has a housing 10 connected to an external device for support, and a rotating shaft 20 connected to an external drive device to transmit rotational power. The rotating shaft 20 drives the magnet 40 to rotate, which in turn drives the friction element 50 to rotate. When the friction element 50 abuts against the rotating assembly 60, it drives the rotating assembly 60 to rotate, which in turn drives the screwdriver head 80 to rotate, thereby enabling screw fastening or loosening. A magnetic coil 90 generates magnetic force, which drives the magnet 40 to move axially toward the rotating assembly 60, causing the friction element 50 to abut against the rotating assembly 60. The magnetic force generated by the magnetic coil 90 is proportional to the friction between the friction element 50 and the rotating assembly 60, meaning the magnetic force generated by the magnetic coil 90 is proportional to the torque of the screwdriver head 80. By adjusting the magnitude of the magnetic force generated by the magnetic coil 90, the torque of the screwdriver head 80 can be controlled. Since the magnetic force generated by the magnetic coil 90 is related to the current in the magnetic coil 90, the torque of the screwdriver head 80 can be controlled by controlling the current, resulting in high adjustment precision.

[0047] The working process of the torque regulating device 100 provided in this embodiment is roughly as follows:

[0048] First, the housing 13 of the torque adjustment device 100 is fixedly connected to an external device via the connecting part 12. Then, the rotating shaft 20 is connected to an external drive device. The external drive device drives the rotating shaft 20 to rotate, which in turn drives the magnet 40 to rotate. The magnet 40 drives the friction element 50 to rotate. The magnetic coil 90 is energized to generate magnetic force, which in turn drives the magnet 40 to move axially toward the end cover 62, so that the friction element 50 contacts the end cover 62 of the rotating assembly 60. The friction drives the end cover 62 to rotate, and the end cover 62 drives the screwdriver head 80 to rotate via the chuck 621, so that the screw can be tightened by the screwdriver head 80.

[0049] When adjusting the torque of the screwdriver bit 80, the controller 110 adjusts the magnetic force generated by the magnetic coil 90 by controlling the current in the magnetic coil 90, thereby adjusting the pressure of the magnet 40 and the friction element 50 on the end cap 62 in the axial direction, thus achieving the function of precise torque adjustment.

[0050] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A torque regulating device, characterized in that, include: The housing has a receiving hole arranged along the axial direction of the housing and passing through the upper and lower ends of the housing, and the outer side of the housing is provided with a connecting part for fixed connection with external equipment; A rotating shaft is coaxially arranged with the housing and one end of the rotating shaft is inserted into the receiving hole; A magnet is coaxially arranged with the housing and slidably disposed in the receiving hole. The magnet is slidably connected to the rotating shaft along the axial direction of the rotating shaft, and the rotating shaft can drive the magnet to rotate around the axis of the magnet. A friction element is coaxially arranged with the magnet and located at the end of the magnet away from the rotating shaft; A rotating assembly is coaxially arranged with the housing. The rotating assembly is rotatably connected to the end of the housing away from the rotating shaft and covers the receiving hole. The rotating assembly abuts against the friction member. A chuck coaxially arranged with the housing is provided on the side of the rotating assembly away from the friction member. A screwdriver bit, detachably connected to the chuck; and A magnetic coil is sleeved on the housing and coaxially arranged with the magnet; wherein... The rotating shaft is connected to an external drive device to drive the magnet and the friction element to rotate. When the magnetic coil is energized, it generates magnetic force to drive the magnet to move along the axial direction of the magnet, thereby driving the friction element to resist the rotating assembly, and thus driving the rotating assembly and the screwdriver head to rotate.

2. The torque adjusting device as described in claim 1, characterized in that, The torque adjustment device also includes a controller electrically connected to the magnetic coil. The controller controls the magnetic force generated by the magnetic coil to control the force between the friction element and the rotating assembly, thereby adjusting the torque of the screwdriver head.

3. The torque adjusting device as described in claim 1, characterized in that, The torque adjustment device further includes a first bearing connected to the housing, the outer ring of the first bearing being fixedly connected to the housing, and the inner ring of the first bearing being sleeved on the rotating shaft.

4. The torque adjusting device as described in claim 1, characterized in that, The magnet has a sliding groove at one end opposite to the rotating shaft. The sliding groove has a polygonal cross-section. The rotating shaft is slidably inserted into the sliding groove at one end of the receiving hole. The cross-section of the rotating shaft at the receiving hole is a polygon that matches the sliding groove.

5. The torque adjusting device as described in claim 1, characterized in that, The magnet is provided with a snap-fit ​​protrusion at one end connected to the friction member. The snap-fit ​​protrusion has a polygonal cross-section. The friction member is provided with a snap-fit ​​groove on one side connected to the magnet. The snap-fit ​​groove has a polygonal cross-section that matches the snap-fit ​​protrusion. The snap-fit ​​protrusion is inserted into the snap-fit ​​groove to connect the magnet and the friction member.

6. The torque adjusting device as described in claim 1, characterized in that, The housing includes an outer shell and a sliding sleeve disposed within the outer shell. The connecting portion is disposed within the outer shell. The receiving hole penetrates the outer shell and the sliding sleeve. The magnet is disposed within the sliding sleeve.

7. The torque adjusting device as described in claim 6, characterized in that, The rotating assembly includes a rotating sleeve rotatably connected to the sliding sleeve and an end cap connected to the rotating sleeve. The rotating sleeve is rotatably connected to the end of the sliding sleeve away from the rotating shaft. The end cap is detachably connected to the rotating sleeve. The end of the end cap facing the sliding sleeve is disposed opposite to the friction member. The clamp is disposed on the side of the end cap away from the friction member.

8. The torque adjusting device as described in claim 7, characterized in that, The torque adjustment device further includes a second bearing sleeved on one end of the sliding sleeve near the end cover, the inner ring of the second bearing being connected to the sliding sleeve and the outer ring of the second bearing being connected to the rotating sleeve.

9. The torque adjusting device as described in claim 7, characterized in that, The side of the friction element facing the end cap is configured as a plane or a tapered surface, and the side of the end cap facing the friction element is configured as a plane or a tapered surface adapted to the friction element.

10. The torque adjusting device as described in claim 1, characterized in that, The torque adjustment device also includes a protective sleeve, which is disposed on the outside of the housing and covers the magnetic coil.

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