Screwdriver

Abstract

The screwdriver comprises a shell, an output shaft, a driving piece, a clutch mechanism used for being in transmission connection with the driving piece and the output shaft, a first torque assembly and a second torque assembly, the first torque assembly comprises a first elastic piece and a first adjusting piece, and the second torque assembly comprises a second elastic piece and a second adjusting piece. The first adjusting piece abuts against the clutch mechanism through the first elastic piece to adjust the first torque, the second adjusting piece abuts against the clutch mechanism through the second elastic piece to adjust the second torque, and the preset clutch torque of the clutch mechanism is the sum of the first torque and the second torque. And when the preset clutch torque is reached, the clutch mechanism interrupts the transmission connection between the driving piece and the output shaft. According to the screwdriver provided by the embodiment of the invention, the torque adjusting range of the screwdriver is enlarged through cooperative use of the first torque assembly and the second torque assembly; in addition, when the first torque assembly is independently used for adjustment, the second torque assembly can be used for calibrating the scale line of the first torque assembly, it is guaranteed that the zero gear accurately corresponds to the minimum torque, and the torque adjustment accuracy of the screwdriver is further guaranteed.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and in particular to a screwdriver. Background Technology

[0002] Most electric screwdrivers on the market now have torque adjustment functions to accommodate a wider range of screw sizes. However, most electric screwdrivers use a single spring and a single torque adjustment sleeve for torque adjustment, resulting in a limited torque adjustment range. For production line assembly operations and machine repair, a single electric screwdriver cannot be used with multiple screw sizes, and screwdrivers with a small torque adjustment range have limited applicability. Summary of the Invention

[0003] In view of this, the present application provides a screwdriver to solve at least one problem existing in the background art.

[0004] In a first aspect, embodiments of this application provide a screwdriver, the screwdriver comprising:

[0005] case;

[0006] The output shaft is used to transmit torque to the tool head to drive it to rotate.

[0007] A drive unit, connected within the housing, is used to output the torque that drives the tool head to rotate;

[0008] A clutch mechanism, used for the transmission connection between the drive component and the output shaft;

[0009] A first torque assembly includes a first elastic element and a first adjusting element, wherein a first end of the first elastic element is connected to the clutch mechanism and a second end of the first adjusting element is connected to the first adjusting element.

[0010] The second torque assembly includes a second elastic element and a second adjusting element, wherein a first end of the second elastic element is connected to the clutch mechanism and a second end is connected to the second adjusting element;

[0011] The first adjusting member presses against the clutch mechanism through the first elastic element to adjust the first torque, and the second adjusting member presses against the clutch mechanism through the second elastic element to adjust the second torque. The preset clutch torque of the clutch mechanism is the sum of the first torque and the second torque. When the torque transmitted from the output shaft to the drive member reaches the preset clutch torque, the clutch mechanism interrupts the transmission connection between the drive member and the output shaft.

[0012] In conjunction with the first aspect of this application, in an alternative embodiment, the maximum value of the first torque is equal to the minimum value of the second torque.

[0013] In conjunction with the first aspect of this application, in an optional embodiment, both the first elastic member and the second elastic member are fitted onto the output shaft, and there is a gap between the first elastic member and the second elastic member. Along the radial direction of the output shaft, the second elastic member is closer to the output shaft, and the first elastic member is farther away from the output shaft.

[0014] In conjunction with the first aspect of this application, in an optional embodiment, the first adjusting member is a first torque adjusting sleeve, one end of the first torque adjusting sleeve is connected to the second end of the first elastic member, the first torque adjusting sleeve is movably sleeved on the outer wall of the housing, and can move along the axial direction of the housing to adjust the first torque.

[0015] In conjunction with the first aspect of this application, in an optional embodiment, the first torque component further includes:

[0016] A first annular gasket is located inside the housing and fitted onto the output shaft. The first annular gasket is connected to the second end of the first elastic element and to the first torque adjusting sleeve.

[0017] In conjunction with the first aspect of this application, in an optional embodiment, the first torque assembly further includes a connecting assembly for connecting the first torque adjusting sleeve and the first annular gasket, the connecting assembly comprising:

[0018] The mounting sleeve is fitted onto the housing, and the mounting sleeve is connected to the first torque adjusting sleeve, forming an installation space therewith;

[0019] A torsion ring is fitted onto the housing and located within the mounting space, and the torsion ring is connected to the first annular gasket;

[0020] When the first torque adjusting sleeve moves along the axis of the housing, it drives the first elastic element to move through the torque ring, thereby adjusting the first torque.

[0021] In conjunction with the first aspect of this application, in an optional embodiment, the housing is provided with a clearance groove that extends along the axial direction of the housing and is positioned opposite to the first torque adjusting sleeve;

[0022] At least one protrusion is formed on the surface of the torsion ring. The protrusion extends in the radial direction of the housing and is inserted into the clearance groove and connected to the first annular gasket.

[0023] In conjunction with the first aspect of this application, in an optional embodiment, the second adjusting member is a second torque adjusting sleeve, one end of the second torque adjusting sleeve is connected to the second end of the second elastic member, and the second torque adjusting sleeve is movably sleeved on the outer wall of the housing and can move along the axial direction of the housing to adjust the second torque;

[0024] The second torque component also includes:

[0025] The second annular gasket is located inside the housing and is fitted onto the output shaft. The second annular gasket is connected to the second end of the second elastic member and is connected to the second torque adjusting sleeve.

[0026] In conjunction with the first aspect of this application, in an optional embodiment, the housing is provided with a plurality of limiting grooves, the plurality of limiting grooves being circumferentially distributed around the axis of the housing and extending along the axial direction of the housing;

[0027] The second torque also includes:

[0028] An adjusting rod is inserted into the limiting groove, one end of which is connected to the second annular washer, and the other end is connected to the second torque adjusting sleeve;

[0029] When the second torque adjusting sleeve moves along the axis of the housing, it drives the second elastic element to move via the adjusting rod, thereby adjusting the second torque.

[0030] In conjunction with the first aspect of this application, in an optional embodiment, the elastic coefficients of the first elastic element and the second elastic element are different.

[0031] The screwdriver provided in this embodiment utilizes a first torque component to achieve basic torque adjustment, and a second torque component to achieve further torque adjustment based on the first torque component. The combined use of the first torque component and the second torque component increases the torque adjustment range of the screwdriver. In addition, when adjusting using the first torque component alone, the second torque component can be used to calibrate the scale line of the first torque component to ensure that the zero position and the minimum torque are precisely matched, further ensuring the torque adjustment accuracy of the screwdriver.

[0032] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1 This is a partial cross-sectional schematic diagram of a screwdriver provided in an embodiment of this application;

[0035] Figure 2 A three-dimensional structural diagram of the housing in a screwdriver provided in an embodiment of this application;

[0036] Figure 3 Another state of the partial cross-sectional schematic diagram of the screwdriver provided in the embodiments of this application;

[0037] Figure 4 This is a partial cross-sectional schematic diagram of a screwdriver provided in another embodiment of this application;

[0038] Figure 5 A three-dimensional structural diagram of the torque ring in the screwdriver provided in the embodiments of this application;

[0039] Figure 6 A cross-sectional perspective view of a screwdriver provided in another embodiment of this application;

[0040] Figure 7 This is a three-dimensional structural diagram of the second torque adjusting sleeve and washer in the screwdriver provided in the embodiment of this application.

[0041] Figure label:

[0042] 10. Housing; 110. Clearance groove; 120. Limiting groove; 130. First scale line; 140. Second scale line;

[0043] 20. Output shaft; 30. Clutch mechanism;

[0044] 40. First torque assembly; 410. First elastic element; 420. First adjusting element; 421. First torque adjusting sleeve; 430. First annular gasket; 440. Connecting assembly; 441. Mounting sleeve; 442. Torque ring; 4421. Protrusion; 4422. Circular protrusion;

[0045] 50. Second torque assembly; 510. Second elastic element; 520. Second adjusting element; 521. Second torque adjusting sleeve; 5211. Mounting groove; 530. Second annular washer; 540. Adjusting rod; 550. Washer; 551. First groove; 560. Support ring;

[0046] 60. Drive block; 70. Drive steel ball; 80. Moving cup; 90. Surface bearing. Detailed Implementation

[0047] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the specific embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the disclosure of the present application to those skilled in the art.

[0048] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0049] In the accompanying drawings, for clarity, the dimensions of layers, areas, and elements, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0050] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.

[0051] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0052] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0053] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0054] like Figure 1 As shown in the figure, this application embodiment provides a screwdriver, which includes a housing 10, an output shaft 20, a drive component (not shown in the figure), a clutch mechanism 30, a first torque component 40, and a second torque component 50.

[0055] The output shaft 20 is used to transmit torque to the tool head to drive it to rotate. The tool head is a screwdriver head. The drive unit is connected inside the housing 10. The drive unit is used to output torque to drive the tool head to rotate. The drive unit is driven by a motor, but it is not limited to this.

[0056] The clutch mechanism 30 is used to drive the drive component and the output shaft 20. When the torque transmitted from the output shaft 20 to the drive component reaches the preset clutch torque, the clutch mechanism 30 switches from the state of transmitting torque to the output shaft 20 to the state of interrupting the transmission of torque to the output shaft 20.

[0057] Figure 1The diagram illustrates the positional relationship between the drive block 60, drive steel ball 70, moving cup 80, clutch mechanism 30, and output shaft 20. Specifically, a clutch steel ball (not shown) connects the clutch mechanism 30 and the output shaft 20 along the axial direction of the output shaft 20. The drive component transmits torque to the clutch mechanism 30, which in turn transmits torque to the output shaft 20 via the clutch steel ball, thereby driving the output shaft 20 to rotate and further driving the tool head to rotate.

[0058] When the output shaft 20 stops rotating and reaches the preset clutch torque, the clutch mechanism 30 passes over the clutch steel ball and pushes the drive block 60 to move towards the tool head along the axial direction of the output shaft 20. The moving drive block 60 has an inclined surface and presses against the drive steel ball 70. The drive steel ball 70 is forced to move towards the center position of the output shaft 20 and can act on the moving cup 80. The moving cup 80 has an inclined surface. Under the action of the drive steel ball 70, the moving cup 80 moves along the axial direction of the output shaft 20 and triggers the Hall switch (not shown in the figure), and the drive stops the torque output.

[0059] In existing technologies, a single spring and adjusting element are generally used to adjust the preset clutch torque, which results in a relatively small torque adjustment range.

[0060] To address the aforementioned technical problems, this application embodiment utilizes a first torque component 40 to achieve basic torque adjustment, and a second torque component 50 to achieve further torque adjustment based on the first torque component 40. The combined use of the first torque component 40 and the second torque component 50 increases the torque adjustment range of the screwdriver. In addition, when adjusting using the first torque component 40 alone, the second torque component 50 can be used to calibrate the scale lines of the first torque component 40, ensuring that the zero setting and the minimum torque correspond precisely, further ensuring the torque adjustment accuracy of the screwdriver.

[0061] Specifically, the first torque assembly 40 includes a first elastic element 410 and a first adjusting element 420. The first end of the first elastic element 410 is connected to the first position of the clutch mechanism 30, and the second end of the first elastic element 410 is connected to the first adjusting element 420.

[0062] The second torque assembly 50 includes a second elastic element 510 and a second adjusting element 520. The first end of the second elastic element 510 is connected to the second position of the clutch mechanism 30, and the second end of the second elastic element 510 is connected to the second adjusting element 520. The second position is different from the first position, and there is a gap between the first elastic element 410 and the second elastic element 510.

[0063] The first adjusting member 420 presses against the clutch mechanism 30 via the first elastic member 410 to adjust the first torque. The second adjusting member 520 presses against the clutch mechanism 30 via the second elastic member 510 to adjust the second torque. The preset clutch torque of the clutch mechanism 30 is the sum of the first torque and the second torque. When the preset clutch torque is reached, the clutch mechanism 30 interrupts the transmission connection between the drive member and the output shaft 20.

[0064] The first torque component 40 and the second torque component 50 independently adjust the first torque and the second torque, respectively. The elastic force of the first elastic element 410 and the second elastic element 510 acting on the clutch mechanism 30 is in the same direction. Therefore, the preset clutch torque is the sum of the first torque and the second torque.

[0065] In an alternative embodiment, such as Figure 2 As shown, the maximum value of the first torque is equal to the minimum value of the second torque. The first torque range corresponds to the first scale line 130, and the second torque range corresponds to the second scale line 140, which is directly connected to the first scale line 130. For example, the first torque range corresponding to the first scale line 130 is 0.5-2 N·m, and the second torque range corresponding to the second scale line 140 is 2-4 N·m.

[0066] In an optional embodiment, the first elastic element 410 and the second elastic element 510 have different elastic coefficients. This not only increases the torque adjustment range of the screwdriver, but also allows for coarse adjustment using one of the first elastic element 410 and the second elastic element 510, while the other allows for precise adjustment.

[0067] In an alternative embodiment, such as Figures 1 to 3 As shown, both the first elastic element 410 and the second elastic element 510 are fitted onto the output shaft 20. Along the radial direction of the output shaft 20, the second elastic element 510 is closer to the output shaft 20, while the first elastic element 410 is farther away from the output shaft 20.

[0068] During the process of adjusting the first torque using the first adjusting member 420 and adjusting the second torque using the second adjusting member 520, the first elastic member 410 and the second elastic member 510 do not come into contact with each other and will not cause mutual interference.

[0069] In an alternative embodiment, such as Figure 3 As shown, the first adjusting member 420 is the first torque adjusting sleeve 421. One end of the first torque adjusting sleeve 421 is connected to the second end of the first elastic member 410. The first torque adjusting sleeve 421 is movably sleeved on the outer wall of the housing 10 and can move along the axial direction of the housing 10 to adjust the first torque.

[0070] The first torque adjusting sleeve 421 is connected to the housing 10 by a thread. The first torque adjusting sleeve 421 moves along the axis of the housing 10 by rotation, and the first elastic element 410 moves with it to adjust the first torque.

[0071] In an alternative embodiment, such as Figure 1 and Figure 4 As shown, the first torque assembly 40 also includes a first annular washer 430, which is located inside the housing 10 and fitted onto the output shaft 20. The first annular washer 430 is connected to the second end of the first elastic member 410 and to the first torque adjusting sleeve 421.

[0072] The first annular washer 430 is connected to the end of the first elastic member 410. When the first torque adjusting sleeve 421 moves, the first torque adjusting sleeve 421 can act on the first annular washer 430 and cause the first elastic member 410 to move synchronously with it. In addition, the first annular washer 430 can make the first elastic member 410 bear force evenly, thereby ensuring adjustment accuracy.

[0073] In an optional embodiment, the first torque assembly 40 further includes a connecting assembly 440 for connecting the first torque adjusting sleeve 421 and the first annular gasket 430. The connecting assembly 440 includes a mounting sleeve 441 and a torque ring 442. The mounting sleeve 441 is fitted onto the outer wall of the housing 10 and is connected to the first torque adjusting sleeve 421, forming an installation space therewith. The torque ring 442 is fitted onto the housing 10 and located within the installation space, and is connected to the first annular gasket 430.

[0074] When the first torque adjusting sleeve 421 moves along the axis of the housing 10, it drives the first annular gasket 430 through the torque ring 442, so that the first elastic element 410 moves synchronously with the first annular gasket 430, thereby adjusting the first torque.

[0075] Figure 2 A three-dimensional structural schematic diagram of the housing 10 is shown. The housing 10 is provided with a clearance groove 110, which extends along the axial direction of the housing 10 and is positioned opposite to the first torque adjusting sleeve 421.

[0076] like Figure 4 and Figure 5 As shown, at least one tab 4421 extends from the surface of the torsion ring 442. The tab 4421 extends in the radial direction of the housing 10 and is inserted into the relief groove 110 and connected to the first annular gasket 430.

[0077] The mounting sleeve 441 is threadedly connected to the first torque adjusting sleeve 421 to improve the ease of installation of the torque ring 442. The torque ring 442 is inserted into the housing 10 from the end with the clearance groove 110. The protrusion 4421 corresponds to the clearance groove 110, and the mounting sleeve 441 causes the protrusion 4421 to abut against the first annular gasket 430. In addition, the protrusion 4421 extending from the torque ring 442 can prevent the first elastic element 410 from rotating with the first torque adjusting sleeve 421, ensuring the adjustment effect.

[0078] The first annular gasket 430 has a connecting groove (not shown in the figure) near the end of the protrusion 4421. The protrusion 4421 matches the connecting groove, thereby improving the connection stability between the protrusion 4421 and the first annular gasket 430.

[0079] In an alternative embodiment, such as Figure 3 and Figure 5 As shown, the surface of the torque ring 442 is provided with multiple circular protrusions 4422. When the mounting sleeve 441 rotates with the first torque adjusting sleeve 421, the multiple circular protrusions 4422 abut against the inner wall of the mounting sleeve 441. When the mounting sleeve 441 rotates relative to the multiple circular protrusions 4422, the circular protrusions 4422 rub against the inner wall of the mounting sleeve 441 to produce an adjustment "click" sound, so that the operator can feel the gear when adjusting the torque.

[0080] In an alternative embodiment, such as Figure 3 As shown, the second adjusting member 520 is the second torque adjusting sleeve 521. One end of the second torque adjusting sleeve 521 is connected to the second end of the second elastic member 510. The second torque adjusting sleeve 521 is movably sleeved on the outer wall of the housing 10 and can move along the axial direction of the housing 10 to adjust the second torque.

[0081] The second torque assembly 50 also includes a second annular gasket 530, which is located inside the housing 10 and fitted onto the output shaft 20. The second annular gasket 530 is connected to the second end of the second elastic member 510 and to the second torque adjusting sleeve 521.

[0082] The second annular gasket 530 and the first annular gasket 430 serve the same purpose: to ensure that the elastic element is subjected to uniform force. The second torque adjusting sleeve 521 and the first torque adjusting sleeve 421 are fitted at different positions on the housing 10. During simultaneous adjustment, they do not come into contact with each other and will not affect each other.

[0083] The second torque adjusting sleeve 521 is connected to the housing 10 by a thread. Rotating the second torque adjusting sleeve 521 causes it to move along the axis of the housing 10 and further causes the second elastic element 510 to move synchronously with it, thereby adjusting the second torque.

[0084] The second torque assembly 50 also includes a support ring 560, which is fitted onto the output shaft 20. The first end of the second elastic member 510 is connected to the support ring 560, and the support ring 560 abuts against the fixing part of the plane bearing 90, which is located between the drive block 70 and the support ring 560. The first end of the first elastic member 410 is connected to the fixing part of the plane bearing 90.

[0085] In an alternative embodiment, such as Figure 2 , Figure 3 and Figure 6 As shown, the housing 10 is provided with a plurality of limiting grooves 120, which are distributed circumferentially around the axis of the housing 10 and extend along the axial direction of the housing 10.

[0086] The second torque also includes an adjusting rod 540, which is inserted into the limiting groove 120. One end of the adjusting rod 540 is connected to the second annular gasket 530, and the other end is connected to the second torque adjusting sleeve 521.

[0087] When the second torque adjusting sleeve 521 moves along the axis of the housing 10, it drives the second elastic element 510 to move via the adjusting rod 540, thereby adjusting the second torque.

[0088] Figure 3 The diagram shows an adjusting rod 540 inserted into a limiting groove 120 of the housing 10. One end of the adjusting rod 540 is connected to a second annular washer 530, and the other end is connected to a second torque adjusting sleeve 521. The limiting groove 120 matches the adjusting rod 540, and the limiting groove 120 restricts the adjusting rod 540 to move only along the axial direction of the housing 10.

[0089] The number and length of the adjusting rods 540 are set according to specific requirements, and this application embodiment does not impose specific limitations.

[0090] In an alternative embodiment, such as Figure 6 and Figure 7 As shown, the second torque adjusting sleeve 521 has a mounting groove 5211 (not shown in the figure) on one side of the contact adjusting rod 540.

[0091] The second torque assembly 50 also includes a washer 550, which matches the mounting groove 5211. The surface of the washer 550 is provided with a plurality of first grooves 551 distributed circumferentially around its axis, and the first grooves 551 match the end of the adjusting rod 540.

[0092] When the second torque adjusting sleeve 521 moves along the axis of the housing 10, the adjusting rod 540 moves out of or into the first groove 551 to emit an adjustment prompt sound.

[0093] During the rotation adjustment of the second torque adjusting sleeve 521, the multiple first grooves 551 of the washer 550 rotate relative to the adjusting rod 540. That is, the adjusting rod 540 moves into or out of the first groove 551, which not only makes a "clicking" sound but also allows the operator to feel the adjustment gear, thus improving the operator's operating experience.

[0094] In an alternative embodiment, such as Figure 6 As shown, the two ends of the adjusting rod 540 have rounded corners, and the adjacent sides of the adjusting rod 540 also have rounded corners. The end face of the adjusting rod 540 close to the housing 10 matches the surface of the housing 10, which is an arc surface. This not only reduces the size of the adjusting rod 540 distributed radially, but also ensures the smooth movement of the adjusting rod 540 in the limiting groove 120.

[0095] like Figure 1 and Figure 2 As shown, the first torque component 40 is used for adjusting the basic torque range, which is the torque range frequently used during production line assembly. For example, it can be set to 0-6 levels and adjusted steplessly through the first torque component 40. The boost torque range is used to increase the torque for less frequently used large-size screws. For example, it can be set to 6-12 levels and adjusted steplessly through the second torque component 50. When using the basic torque adjustment application alone, that is, when adjusting the torque using the first torque component 40, the zero position of the first torque component 40 can be calibrated by fine-tuning the torque through the second torque component 50, ensuring that the zero position corresponds precisely to the minimum torque, further ensuring the accuracy of torque adjustment.

[0096] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A screwdriver, characterized in that, The utility model relates to a torque output device, comprising: a housing; an output shaft for transmitting torque to a tool head to drive it to rotate; a driving member connected in the housing for outputting torque to drive the tool head to rotate; a clutch mechanism for drivingly connecting the driving member and the output shaft; a first torque assembly comprising a first elastic member and a first adjusting member, the first end of the first elastic member being connected to the clutch mechanism, and the second end being connected to the first adjusting member; a second torque assembly comprising a second elastic member and a second adjusting member, the first end of the second elastic member being connected to the clutch mechanism, and the second end being connected to the second adjusting member; wherein the first adjusting member is pressed against the clutch mechanism by the first elastic member to adjust the first torque, the second adjusting member is pressed against the clutch mechanism by the second elastic member to adjust the second torque, and the preset clutch torque of the clutch mechanism is the sum of the first torque and the second torque, and when the torque transmitted by the output shaft to the driving member reaches the preset clutch torque, the clutch mechanism interrupts the driving connection between the driving member and the output shaft.

2. The screwdriver according to claim 1, characterized in that The maximum value of the first torque is equal to the minimum value of the second torque.

3. The screwdriver of claim 1, wherein The first elastic member and the second elastic member are sleeved on the output shaft, and there is a gap between the first elastic member and the second elastic member, along the radial direction of the output shaft, the second elastic member is close to the output shaft, and the first elastic member is away from the output shaft.

4. The screwdriver of claim 1, wherein The first adjusting member is a first torque adjusting sleeve, one end of the first torque adjusting sleeve is connected to the second end of the first elastic member, the first torque adjusting sleeve is movably sleeved on the outer wall of the housing and can move along the axis direction of the housing to adjust the first torque.

5. The screwdriver of claim 4, wherein, The first torque assembly further comprises: a first annular gasket located in the housing and sleeved on the output shaft, the first annular gasket is connected to the second end of the first elastic member and connected to the first torque adjusting sleeve.

6. The screwdriver of claim 5, wherein, The first torque assembly further comprises a connecting assembly for connecting the first torque adjusting sleeve and the first annular gasket, the connecting assembly comprises: a mounting sleeve sleeved on the housing, the mounting sleeve is connected to the first torque adjusting sleeve and forms a mounting space with it; a torque ring sleeved on the housing and located in the mounting space, the torque ring is connected to the first annular gasket; When the first torque adjusting sleeve moves along the axis direction of the housing, the first elastic member is driven to move by the torque ring to adjust the first torque.

7. The screwdriver of claim 6, wherein The housing is provided with a relief groove extending along the axis direction of the housing, and the relief groove is opposite to the position of the first torque adjusting sleeve; The surface of the torque ring extends to form at least one tab extending along the radial direction of the housing, the tab is inserted into the relief groove and connected to the first annular gasket.

8. The screwdriver of claim 1, wherein The second adjusting member is a second torsion adjusting sleeve, one end of the second torsion adjusting sleeve is connected with the second end of the second elastic member, the second torsion adjusting sleeve is movably sleeved on the outer wall of the shell and can move along the shell axis direction to adjust the second torque; The second torque assembly further comprises: A second annular gasket is located in the shell and sleeved on the output shaft, the second annular gasket is connected with the second end of the second elastic member and the second torsion adjusting sleeve.

9. The screwdriver of claim 8, wherein, The shell is provided with a plurality of limiting grooves which are distributed circumferentially around the shell axis and extend along the axis direction of the shell; The second torque further comprises: An adjusting rod is inserted into the limiting groove, one end of the adjusting rod is connected with the second annular gasket and the other end is connected with the second torsion adjusting sleeve; When the second torsion adjusting sleeve moves along the shell axis direction, the second elastic member is driven to move by the adjusting rod to adjust the second torsion.

10. Screwdriver according to any one of claims 1 to 9, characterized in that The elastic coefficients of the first elastic member and the second elastic member are different.

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