Anti-loose screwdriver bit

Abstract

This invention discloses an anti-loosening screwdriver bit, belonging to the field of screwdriver bit technology. It includes an installation tool with a bit-changing mechanism. The installation tool includes an electric screwdriver, and a bit mounting shaft is located inside the nozzle of the electric screwdriver. A mounting sleeve is fixed to the nozzle of the electric screwdriver by bolts, and an elastic component is provided on one side of the mounting sleeve. This invention allows for the switching of the bit, which in turn moves a reset component and a hydraulic drive component, thereby pushing the elastic component to separate the screw limit component from the original screwdriver bit. Switching the bit allows for easy replacement of different screwdriver bit models without manual disassembly or individual bit replacement, greatly simplifying the operation and improving work efficiency. Furthermore, it prevents the screwdriver bit from falling or being lost during the replacement process, making it particularly suitable for high-altitude operations and effectively avoiding the safety hazards caused by falling screwdriver bits.

Description

Technical Field

[0001] This invention relates to the field of screwdriver bit technology, and more particularly to an anti-loosening screwdriver bit. Background Technology

[0002] Screwdriver bits are indispensable tools in mechanical assembly, construction, and equipment maintenance. Their ease of use, safety, and work efficiency directly affect assembly quality and construction progress. Currently, screwdriver bits are generally individual units, and they are prone to falling out or being lost when changing between different models. This is especially problematic when working at heights, as fallen bits not only affect work efficiency but also pose safety hazards. Furthermore, while existing technologies can use magnetic attraction or mechanical anti-loosening mechanisms to secure screws, the magnetism of the bits can weaken due to high temperatures, strong magnetic fields, impacts, or prolonged use. Magnetic bits also easily attract impurities such as iron filings and metal dust, and in situations where magnetic interference needs to be avoided, magnetic bits can become an obstacle. Common mechanical anti-loosening mechanisms allow the screw to be driven in to a certain extent initially, but due to the limiting effect of the anti-loosening mechanism, the screw must be removed first before driving it in again, adding a second step and reducing efficiency.

[0003] To address the above problems, this invention proposes an anti-loosening screwdriver bit. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of existing screwdriver bits, which are generally independent and easily fall off or are lost when changing to different models. In addition, although existing technologies can use magnetic attraction or mechanical anti-loosening mechanisms to fix screws, magnetic bits may become an obstacle in situations where magnetic interference needs to be avoided. Common mechanical anti-loosening mechanisms require secondary operation during use, which is very inconvenient. Therefore, this invention proposes an anti-loosening screwdriver bit.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A screwdriver bit designed to prevent loosening includes an installation tool, wherein the installation tool is provided with a bit replacement mechanism;

[0007] The installation tool includes an electric screwdriver, the inside of which is provided with a blade mounting shaft. An installation sleeve is fixed to the nozzle of the electric screwdriver by bolts. An elastic component is provided on one side of the installation sleeve, and a screw limiting component is provided at one end of the elastic component.

[0008] The screwdriver bit changing mechanism includes a switching screwdriver bit. A reset component is provided below the switching screwdriver bit. The switching screwdriver bit is connected to the mounting sleeve through the reset component, so that the switching screwdriver bit is integrated with the electric screwdriver, thereby meeting the operation of quickly changing the screwdriver bit. One end of the reset component is connected to the hydraulic drive component, and the hydraulic drive component is connected to one end of the elastic component. During the screwdriver bit changing process, the reset component is linked with the hydraulic drive component to drive the elastic component to move, so that the screw limit component is pushed away from the screwdriver bit, thus meeting the screwdriver bit changing conditions.

[0009] The screw is positioned on the screwdriver head by the screw limiting component, and the screw is tightened at the same time. After one end of the screw limiting component contacts the surface of the object, it automatically retracts, allowing the screw to be tightened directly.

[0010] Preferably, one end of the cutter head mounting shaft is fixedly connected to a shaft seat, and the shaft seat has multiple shaft holes.

[0011] Preferably, the reset assembly includes a guide sleeve mounted on an mounting sleeve, a guide rod slidably connected in the guide sleeve, a connecting handle and a mounting head fixedly connected to both ends of the guide rod, and a third spring fixedly connected between the mounting head and the guide sleeve.

[0012] Preferably, the switching head includes a head shaft and multiple screwdriver heads. The head shaft is rotatably mounted on the mounting head via bearings. A handle is fixedly connected to the head shaft. The screwdriver heads can be classified into slotted, Phillips, star, square, and hexagonal types according to their head shape.

[0013] Preferably, the screwdriver bit is rotatably mounted on a screwdriver bit holder via a bearing. One end of the screwdriver bit is fixedly connected to a cutter disc, and one side of the cutter disc is fixedly connected to multiple alignment rods, the size of which is adapted to the size of the shaft hole.

[0014] Preferably, the elastic component includes a telescopic rod and a first spring, one end of the telescopic rod and the first spring are fixedly connected to the mounting sleeve, one end of the first spring is fixedly connected to the side wall of the outer protective cylinder, and one end of the outer protective cylinder is fixedly connected to a connecting plate.

[0015] Preferably, the hydraulic drive assembly includes an upper storage cylinder and a lower storage cylinder, which are respectively installed on the upper and lower sides of the mounting sleeve. The upper storage cylinder is provided with a first piston rod, and one end of the first piston rod extending out of the upper storage cylinder is fixedly connected to the connecting handle.

[0016] Preferably, the upper storage cylinder and the lower storage cylinder are connected by a flexible hose, and the lower storage cylinder is provided with a second piston rod, one end of which protrudes from the lower storage cylinder and overlaps with the connecting plate.

[0017] Preferably, the screw limiting assembly includes a bracket, which is fixedly connected to one end of the outer protective cylinder. A sliding rod is provided on one side of the bracket, and a pressure plate is fixedly connected to one end of the sliding rod. A second spring is fixedly connected between the pressure plate and the bracket.

[0018] Preferably, the other end of the slide rod is provided with two guide wheels, which are slidably connected in two inclined openings. The two inclined openings are opened on the adjustment frame. An adjustment rod is fixedly connected to the top of the adjustment frame. The adjustment rod passes through the bracket upward and is fixedly connected to the U-shaped frame.

[0019] Compared with the prior art, the present invention provides an anti-loosening screwdriver bit, which has the following beneficial effects:

[0020] 1. This anti-loosening screwdriver bit, by operating the bit switching mechanism, can link the reset component and the hydraulic drive component to move, which in turn can push the elastic component to separate the screw limit component from the original screwdriver bit. At this time, the bit switching can be used to easily replace different models of screwdriver bits without the need for manual disassembly and individual screwdriver bit replacement, which greatly simplifies the operation steps and improves work efficiency. At the same time, the screwdriver bit will not fall or be lost during the replacement process, which is especially suitable for high-altitude operation scenarios and can effectively avoid the safety hazards caused by falling screwdriver bits.

[0021] 2. This anti-loosening screwdriver bit uses a screw limiting component to hold the screw firmly against the head of the screwdriver bit, maintaining a stable connection between the two. This effectively prevents the screw from slipping during tightening, avoiding work interruptions and ensuring assembly quality. Simultaneously, when the screw is almost fully tightened and reaches the preset tightness, the pressure plate of the screw limiting component contacts the surface of the object, causing the sliding rod to move downwards via the guide wheel and the bevel, automatically disengaging the U-shaped bracket from the screw. This eliminates the need for secondary loosening operations by the operator, simplifying the work process, further improving work efficiency, and avoiding the limitations of the working environment caused by using magnetic screwdriver bits.

[0022] 3. This anti-loosening screwdriver bit features a switching component that moves a reset component. The reset component, in turn, is hydraulically driven by a spring component, disengaging the screw limit component from the screwdriver head. This allows for direct screwdriver head replacement without the need for separate repositioning of the screw limit component, ensuring smooth head switching. After switching, the screwdriver head's alignment rod automatically engages with the shaft hole, automatically connecting to the head's mounting shaft. Simultaneously, the screw limit component clamps the screw onto the screwdriver head, preventing it from slipping out. Furthermore, during tightening, the screw limit component automatically disengages from the surface of the object it contacts, ensuring direct tightening. This combined approach achieves seamless, rapid switching between multiple screwdriver head models, anti-drop functionality, and automatic screw loosening, improving work efficiency and assembly quality while ensuring safety in scenarios such as high-altitude operations. It significantly optimizes screwdriver head performance and meets the needs of various assembly tasks. Attached Figure Description

[0023] Figure 1 This is a perspective view of an anti-loosening screwdriver bit proposed in this invention;

[0024] Figure 2 This is a perspective view of the connection between the mounting sleeve and the elastic component of an anti-loosening screwdriver bit proposed in this invention;

[0025] Figure 3 This is a perspective view of the connection between the elastic component and the screw limiting component of an anti-loosening screwdriver bit proposed in this invention.

[0026] Figure 4 This is a perspective view of the connection between the mounting sleeve and the reset assembly of the anti-loosening screwdriver bit proposed in this invention;

[0027] Figure 5 This is a perspective view of the screwdriver bit mounting shaft for an anti-loosening screwdriver bit proposed in this invention;

[0028] Figure 6 This is a perspective view of a reset assembly and switching head for an anti-loosening screwdriver bit proposed in this invention;

[0029] Figure 7 This is a perspective view of a reset assembly for an anti-loosening screwdriver bit proposed in this invention;

[0030] Figure 8 This is a perspective view of a hydraulic drive assembly for an anti-loosening screwdriver bit proposed in this invention;

[0031] Figure 9 This is a cross-sectional perspective view of an elastic component for an anti-loosening screwdriver bit proposed in this invention;

[0032] Figure 10This is a cross-sectional perspective view of a screw limiting component for an anti-loosening screwdriver bit proposed in this invention.

[0033] In the diagram: 100, Installation tool; 101, Electric screwdriver; 102, Installation sleeve; 103, Elastic component; 1031, Outer protective sleeve; 1032, Connecting plate; 1033, First spring; 1034, Telescopic rod; 104, Screwdriver head mounting shaft; 105, Shaft seat; 106, Screw limit assembly; 1061, Bracket; 1062, Adjusting frame; 1063, Slanted opening; 1064, Pressure plate; 1065, Slide rod; 1066, Second spring; 1067, Guide wheel; 1068, Adjusting rod; 1069, U-shaped frame; 10 7. Shaft hole; 200. Tool head changing mechanism; 201. Tool head switching; 2011. Handle; 2012. Tool head shaft holder; 2013. Screwdriver head; 2014. Tool disc; 2015. Alignment rod; 202. Reset assembly; 2021. Guide sleeve; 2022. Connecting handle; 2023. Guide rod; 2024. Third spring; 2025. Mounting head; 203. Hydraulic drive assembly; 2031. Upper storage cylinder; 2032. First piston rod; 2033. Lower storage cylinder; 2034. Hoses; 2035. Second piston rod. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0036] Example 1: Refer to Figures 1-10 A screwdriver bit designed to prevent loosening, comprising an installation tool 100, wherein the installation tool 100 is provided with a bit replacement mechanism 200;

[0037] The installation tool 100 includes an electric screwdriver 101. The nozzle of the electric screwdriver 101 is provided with a cutting head mounting shaft 104. One end of the cutting head mounting shaft 104 is fixedly connected to a shaft seat 105. The shaft seat 105 is provided with multiple shaft holes 107. An installation sleeve 102 is fixed to the nozzle of the electric screwdriver 101 by bolts. An elastic component 103 is provided on one side of the installation sleeve 102. A screw limiting component 106 is provided at one end of the elastic component 103.

[0038] The screwdriver head changing mechanism 200 includes a switching head 201, which comprises a head holder 2012 and multiple screwdriver heads 2013. The head holder 2012 is rotatably mounted on the mounting head 2025 via bearings. A handle 2011 is fixedly connected to the head holder 2012, allowing for easy movement of the head holder 2012 and facilitating the replacement of the screwdriver heads 2013. The screwdriver heads 2013 can be categorized by head shape into slotted, Phillips, star, square, and hexagonal types. The screwdriver heads 2013 are rotatably mounted on the head holder 2012 via bearings. A cutter disc 2014 is fixedly connected to one end of the screwdriver head 2013, and multiple alignment rods 2015 are fixedly connected to one side of the cutter disc 2014. The size of the alignment rods 2015 corresponds to the size of the shaft hole 107. To match, a reset assembly 202 is provided below the switching head 201. The reset assembly 202 includes a guide sleeve 2021, which is installed on the mounting sleeve 102. A guide rod 2023 is slidably connected in the guide sleeve 2021. The guide rod 2023 can slide in the guide sleeve 2021, so that the head bracket 1061 can drive the screwdriver head 2013 to be easily removed from the head mounting shaft 104. At the same time, after the third spring 2024 is reset, the alignment rod 2015 can be locked with the shaft hole 107, so that the electric screwdriver 101 can smoothly drive the screwdriver head 2013 to rotate, which is convenient for tightening screws. The two ends of the guide rod 2023 are respectively fixedly connected to the connecting handle 2022 and the mounting head 2025. The mounting head 2025 and the guide sleeve 2021 are fixedly connected to the third spring 2024.

[0039] The switching head 201 is connected to the mounting sleeve 102 via the reset assembly 202, allowing the switching head 201 to be integrated with the electric screwdriver 101, thus enabling the switching head 201 to quickly change the screwdriver head 2013. One end of the reset assembly 202 is connected to the hydraulic drive assembly 203, which includes an upper storage cylinder 2031 and a lower storage cylinder 2033. The upper and lower storage cylinders 2031 and 2033 are respectively installed on the upper and lower sides of the mounting sleeve 102. A first piston rod 2032 is provided in the upper storage cylinder 2031. One end of the first piston rod 2032 extends out of the upper storage cylinder 2031 and is fixedly connected to the connecting handle 2022. A sealing ring can be added to the position where the first piston rod 2032 passes through the upper storage cylinder 2031 for sealing. The upper storage cylinder 2031 and the lower storage cylinder 2033 are connected by a hose 2034. Since the diameter of the lower storage cylinder 2033 is smaller than that of the upper storage cylinder 2031, after the liquid enters the lower storage cylinder 2033, the movement distance of the second piston rod 2035 is much greater than the movement distance of the screwdriver head 2013. This allows the screw limiting component 106 to smoothly disengage from the screwdriver head 2013, facilitating the switching of the screwdriver head 2013. The lower storage cylinder 2033 is equipped with a second piston rod 2035. One end of the second piston rod 2035 protrudes from the lower storage cylinder 2033 and overlaps with the connecting plate 1032. The hydraulic drive component 203 is connected to one end of the elastic component 103. During the process of changing the screwdriver head 2013 by switching the screwdriver head 201, the reset component 202 is linked with the hydraulic drive component 203 to drive the elastic component 103 to move, causing the screw limiting component 106 to push away from the screwdriver head 2013, thus satisfying the screwdriver head 2013 changing head condition.

[0040] The screw is positioned on the screwdriver head 2013 by the screw limiting component 106, and the screw tightening process is carried out at the same time. After one end of the screw limiting component 106 contacts the surface of the object, it automatically retracts, so that the screw can be tightened directly.

[0041] In this embodiment: pulling the handle 2011 moves the cutter head shaft holder 2012, causing the alignment rod 2015 to separate from the shaft hole 107. Simultaneously, the cutter head shaft holder 2012 moves the mounting head 2025, causing the third spring 2024 to deform. This deformation, via the guide rod 2023 and connecting handle 2022, moves the first piston rod 2032, allowing liquid to enter the lower storage cylinder 2033. Hydraulic pressure can also move the first piston rod 2032 and the guide rod 2023, thereby driving the elastic component 103 to separate the screw limit component 106 from the original screwdriver head 2013. At this point, rotating the handle 2011 allows for easy replacement of different screwdriver bits 2013. Then, the third spring 2024 resets the screwdriver bit holder 2012 and the screwdriver bit 2013, allowing the alignment rod 2015 to lock into the shaft hole 107. This process eliminates the need for manual disassembly and separate replacement of the screwdriver bit 2013, significantly simplifying the operation and improving work efficiency. Furthermore, the screwdriver bit 2013 will not fall or be lost during the replacement process, making it particularly suitable for high-altitude operations and effectively preventing safety hazards caused by falling screwdriver bits 2013.

[0042] Example 2: Refer to Figures 9-10 An anti-loosening screwdriver bit includes an elastic component 103, which includes a telescopic rod 1034 and a first spring 1033. One end of the telescopic rod 1034 and the first spring 1033 is fixedly connected to the mounting sleeve 102. One end of the first spring 1033 is fixedly connected to the side wall of the outer protective cylinder 1031. One end of the outer protective cylinder 1031 is fixedly connected to a connecting plate 1032.

[0043] The screw limiting assembly 106 includes a bracket 1061, one end of which is fixedly connected to the outer protective cylinder 1031. A slide rod 1065 is inserted through one side of the bracket 1061, and a pressure plate 1064 is fixedly connected to one end of the slide rod 1065. A second spring 1066 is fixedly connected between the pressure plate 1064 and the bracket 1061. The second spring 1066 can drive the pressure plate 1064 to reset, causing the slide rod 1065 to drive the guide wheel 1067 to reset. The guide wheel 1067 controls the adjustment frame through the inclined plate 1063. 1062 is reset upwards, causing the adjusting rod 1068 to drive the U-shaped frame 1069 to complete the reset action, thereby facilitating the subsequent clamping of the screw. The other end of the slide rod 1065 is provided with two guide wheels 1067, which are slidably connected in two inclined openings 1063. The two inclined openings 1063 are opened on the adjusting frame 1062. The adjusting rod 1068 is fixedly connected to the top of the adjusting frame 1062. The adjusting rod 1068 passes through the bracket 1061 upwards and is fixedly connected to the U-shaped frame 1069.

[0044] In this embodiment: the first spring 1033 can drive the bracket 1061 and the adjusting rod 1068 to reset, so that the U-shaped frame 1069 clamps the screw at the head of the screwdriver head 2013, maintaining a stable connection between the screw and the screwdriver head 2013, effectively preventing the screw from slipping during tightening, avoiding work interruption, and ensuring assembly quality. At the same time, when the screw is about to be tightened and reaches the preset tightness, the pressure plate 1064 contacts the surface of the object. The pressure plate 1064 drives the slide rod 1065 to move. The slide rod 1065, through the cooperation of the guide wheel 1067 and the inclined plate 1063, drives the adjusting rod 1068 to move downward, so that the U-shaped frame 1069 automatically disengages from the screw, eliminating the need for the operator to perform a secondary loosening operation, simplifying the work process, further improving work efficiency, and avoiding the problem of limited working environment caused by using magnetic screwdriver heads.

[0045] Example 3: Reference Figures 1-4 A screwdriver bit designed to prevent loosening, comprising an installation tool 100, wherein the installation tool 100 is provided with a bit replacement mechanism 200;

[0046] The installation tool 100 includes an electric screwdriver 101. The nozzle of the electric screwdriver 101 is provided with a blade mounting shaft 104. An installation sleeve 102 is fixed to the nozzle of the electric screwdriver 101 by bolts. An elastic component 103 is provided on one side of the installation sleeve 102. A screw limiting component 106 is provided at one end of the elastic component 103.

[0047] The screwdriver bit changing mechanism 200 includes a switching screwdriver bit 201. A reset component 202 is provided below the switching screwdriver bit 201. The switching screwdriver bit 201 is connected to the mounting sleeve 102 through the reset component 202, so that the switching screwdriver bit 201 and the electric screwdriver 101 are assembled together, thereby satisfying the operation of quickly changing the screwdriver bit 2013. One end of the reset component 202 is connected to the hydraulic drive component 203, and the hydraulic drive component 203 is connected to one end of the elastic component 103.

[0048] In this embodiment: the switching component can drive the reset component 202 to move, and the reset component 202 can drive the elastic component 103 to move through the hydraulic drive component 203, causing the screw limiting component 106 to disengage from the screwdriver head 2013. At this time, the switching head 201 can directly replace the screwdriver head 2013 without separately shifting the screw limiting component 106, ensuring the smooth switching of the screwdriver head 2013. After switching, the alignment rod 2015 of the screwdriver head 2013 automatically engages with the shaft hole 107, automatically completing the connection with the head mounting shaft 104. Simultaneously... The screw limiting component 106 can clamp the screw onto the screwdriver head 2013, preventing the screw from coming loose. Moreover, during the screw tightening process, the screw limiting component 106 can automatically disengage from the surface of the object it contacts, ensuring that the screw is tightened directly. By combining the above methods, the screwdriver head 2013 achieves the integrated effect of non-interference and rapid switching between multiple models, anti-drop, and automatic screw loosening. This not only improves work efficiency and assembly quality but also ensures safety in scenarios such as high-altitude operations, significantly optimizing the performance of the screwdriver head 2013 and meeting the needs of various assembly operations.

[0049] Working principle: When switching screwdriver bits 2013, pulling the handle 2011 moves the bit holder 1061, causing the original screwdriver bit 2013 to disengage the alignment rod 2015 from the shaft hole 107. Simultaneously, the bit holder 1061 moves the mounting head 2025, which in turn deforms the third spring 2024, causing the guide rod 2023 and connecting handle 2022 to move. This moves the first piston rod 2032, allowing liquid to be added to the lower storage cylinder 2033 through the hose 2034. Because the inner diameter of the lower storage cylinder 2033 is small, the hydraulically driven second piston rod 2035 moves a much greater distance than the screwdriver bit 2013. The second piston rod 2035 pushes the connecting plate 1032 and the outer protective cylinder 1031 to move. The outer protective cylinder 1031 drives the first spring 1033 to deform. At the same time, the outer protective cylinder 1031 drives the screw limiting assembly 106 to disengage from the screwdriver head 2013. At this time, the handle 2011 is rotated so that the screwdriver head shaft 2012 can smoothly drive the screwdriver head 2013 to perform switching operations. After switching, the third spring 2024 drives the screwdriver head shaft 2012 to reset, so that the alignment rod 2015 of the screwdriver head 2013 engages with the shaft hole 107, completing the connection with the screwdriver head mounting shaft 104. At the same time, the first spring 1033 drives the screw limiting assembly 106 to reset.

[0050] During screw tightening, the adjusting rod 1068 is pulled individually, causing the bracket 1061 to deform through the outer protective sleeve 1031 and the first spring 1033. Simultaneously, the U-shaped bracket 1069 disengages from the screwdriver head 2013. The screw is then aligned with the screwdriver head 2013. After the first spring 1033 returns to its original position, the bracket 1061 drives the adjusting rod 1068 and the U-shaped bracket 1069 to return to their original positions, allowing the U-shaped bracket 1069 to clamp the screw head. Then, the electric screwdriver 101 drives the screwdriver head mounting shaft 104 and the screwdriver head 2013 to rotate. 2013 drives the screw to tighten. When the screw is about to be tightened, the pressure plate 1064 is brought into contact with the surface of the object. By continuing to tighten, the pressure plate 1064 drives the slide rod 1065 to move. The slide rod 1065 drives the guide wheel 1067 to move. The guide wheel 1067 squeezes the adjusting frame 1062 downward through the inclined hole 1063. The adjusting frame 1062 drives the adjusting rod 1068 and the U-shaped frame 1069 to move downward, so that the U-shaped frame 1069 is disengaged from the head of the screw. At this time, the screwdriver head 2013 can directly complete the screw tightening operation.

[0051] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A screwdriver bit designed to prevent loosening, comprising an installation tool (100), characterized in that, The installation tool (100) is equipped with a blade replacement mechanism (200). The installation tool (100) includes an electric screwdriver (101), a blade mounting shaft (104) is provided inside the muzzle of the electric screwdriver (101), an installation sleeve (102) is fixed to the muzzle of the electric screwdriver (101) by bolts, an elastic component (103) is provided on one side of the installation sleeve (102), and a screw limiting component (106) is provided at one end of the elastic component (103). The screwdriver bit changing mechanism (200) includes a switching head (201). A reset component (202) is provided below the switching head (201). The switching head (201) is connected to the mounting sleeve (102) through the reset component (202), so that the switching head (201) and the electric screwdriver (101) are assembled together, thereby satisfying the operation of quickly changing the screwdriver bit (2013) through the switching head (201). One end of the reset component (202) is connected to the hydraulic drive component (203), and the hydraulic drive component (203) is connected to one end of the elastic component (103). During the process of changing the screwdriver bit (2013) through the switching head (201), the reset component (202) is linked with the hydraulic drive component (203) to drive the elastic component (103) to move, so that the screw limit component (106) is pushed away from the screwdriver bit (2013), thus satisfying the screwdriver bit (2013) changing head conditions. The screw is positioned on the screwdriver head (2013) by the screw limiting component (106) and the screw is tightened at the same time. After one end of the screw limiting component (106) contacts the surface of the object, it automatically retracts, so that the screw can be tightened directly.

2. The anti-loosening screwdriver bit according to claim 1, characterized in that, One end of the cutter head mounting shaft (104) is fixedly connected to a shaft seat (105), and the shaft seat (105) has multiple shaft holes (107).

3. The anti-loosening screwdriver bit according to claim 2, characterized in that, The reset assembly (202) includes a guide sleeve (2021), which is mounted on the mounting sleeve (102). A guide rod (2023) is slidably connected in the guide sleeve (2021). A connecting handle (2022) and a mounting head (2025) are fixedly connected to both ends of the guide rod (2023). A third spring (2024) is fixedly connected between the mounting head (2025) and the guide sleeve (2021).

4. The anti-loosening screwdriver bit according to claim 3, characterized in that, The switching head (201) includes a head shaft (2012) and multiple screwdriver heads (2013). The head shaft (2012) is rotatably mounted on the mounting head (2025) via bearings. A handle (2011) is fixedly connected to the head shaft (2012). The screwdriver heads (2013) can be classified into slotted, Phillips, star, star, square, and hexagonal types according to their head shape.

5. The anti-loosening screwdriver bit according to claim 4, characterized in that, The screwdriver head (2013) is rotatably mounted on the screwdriver head frame (2012) via a bearing. One end of the screwdriver head (2013) is fixedly connected to a cutter disc (2014). A plurality of alignment rods (2015) are fixedly connected to one side of the cutter disc (2014). The size of the alignment rods (2015) is adapted to the size of the shaft hole (107).

6. The anti-loosening screwdriver bit according to claim 3, characterized in that, The elastic component (103) includes a telescopic rod (1034) and a first spring (1033). One end of the telescopic rod (1034) and the first spring (1033) are fixedly connected to the mounting sleeve (102). One end of the first spring (1033) is fixedly connected to the side wall of the outer protective cylinder (1031). One end of the outer protective cylinder (1031) is fixedly connected to a connecting plate (1032).

7. The anti-loosening screwdriver bit according to claim 6, characterized in that, The hydraulic drive assembly (203) includes an upper storage cylinder (2031) and a lower storage cylinder (2033), which are respectively installed on the upper and lower sides of the mounting sleeve (102). The upper storage cylinder (2031) is provided with a first piston rod (2032), and one end of the first piston rod (2032) extending out of the upper storage cylinder (2031) is fixedly connected to the connecting handle (2022).

8. The anti-loosening screwdriver bit according to claim 7, characterized in that, The upper storage cylinder (2031) and the lower storage cylinder (2033) are connected by a flexible hose (2034). The lower storage cylinder (2033) is provided with a second piston rod (2035), and one end of the second piston rod (2035) protruding from the lower storage cylinder (2033) is connected to the connecting plate (1032).

9. A screwdriver bit for preventing loosening according to claim 6, characterized in that, The screw limiting assembly (106) includes a bracket (1061), which is fixedly connected to one end of the outer protective cylinder (1031). A slide rod (1065) is provided on one side of the bracket (1061), and a pressure plate (1064) is fixedly connected to one end of the slide rod (1065). A second spring (1066) is fixedly connected between the pressure plate (1064) and the bracket (1061).

10. A screwdriver bit for preventing loosening according to claim 9, characterized in that, The other end of the slide bar (1065) is provided with two guide wheels (1067), which are slidably connected in two oblique openings (1063). The two oblique openings (1063) are opened on the adjustment frame (1062). An adjustment rod (1068) is fixedly connected above the adjustment frame (1062). The adjustment rod (1068) passes through the bracket (1061) upward and is fixedly connected to the U-shaped frame (1069).

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