Anti-falling mechanism and fastener tightening device

Abstract

The utility model relates to an anti-falling mechanism and a fastener tightening device. The anti-falling mechanism comprises a base and a connecting rod which is arranged on the base in a penetrating mode, and one end of the connecting rod is used for being connected with a driving piece. The first sleeve sleeves the other end of the connecting rod; a first mounting groove communicated with an inner cavity of the first sleeve is formed in the side, facing the base, of the first sleeve, and an opening of the first mounting groove faces the base; the second sleeve is slidably arranged in an inner cavity of the first sleeve; the side, facing the base, of the second sleeve is connected to the other end of the connecting rod, and a containing groove is formed in the side, back to the base, of the second sleeve; and the elastic piece is arranged on the connecting rod in a sleeving mode, the elastic piece is provided with a first end and a second end which are opposite, the first end is contained in the first installation groove, and the second end abuts against the side, facing the first sleeve, of the base. According to the anti-falling mechanism provided by the invention, the speed during exiting is controlled, and the risk that the fastener falls off due to rapid exiting is avoided; and meanwhile, the structure is simple, and the manufacturing cost is low.

Description

Technical Field

[0001] This application relates to the field of mechanical equipment technology, and in particular to an anti-loosening mechanism and a fastener tightening device. Background Technology

[0002] With the rapid development of the new energy vehicle industry, new automobile manufacturing methods such as die casting and open-packing processes are gradually becoming more widespread, driving innovation in connection technology. Traditional welding methods are gradually being replaced by bolting technology. Bolting technology has advantages such as high precision, disassembly capability, and strong adaptability, enabling reliable connections of complex structures and facilitating later maintenance.

[0003] However, during the tightening of screws and other fasteners inside the cavity, the confined space and limited visibility make the operation difficult, and fasteners are prone to falling out and into the cavity. This not only affects production efficiency but may also lead to equipment malfunctions, safety hazards, and increased maintenance costs. Utility Model Content

[0004] Therefore, it is necessary to provide an anti-loosening mechanism and a fastener tightening device to address the problem that fasteners are prone to coming loose during the tightening process.

[0005] An anti-detachment mechanism, the anti-detachment mechanism comprising:

[0006] Base

[0007] A connecting rod is provided through the base, and one end of the connecting rod is connected to the driving component;

[0008] A first sleeve is slidably fitted onto the other end of the connecting rod; the first sleeve has a first mounting groove on its side facing the base, communicating with the inner cavity of the first sleeve, and the opening of the first mounting groove faces the base; and,

[0009] An elastic element is sleeved on the connecting rod, with one end of the elastic element housed in the first mounting groove and the other end abutting against the base.

[0010] The aforementioned anti-detachment mechanism, by setting an elastic element sleeved on the connecting rod, with the first end of the elastic element housed in the first mounting groove of the first sleeve and the second end of the elastic element abutting against the side of the base facing the first sleeve, allows the anti-detachment mechanism to move. When the first sleeve is subjected to external resistance, the first sleeve moves and compresses the elastic element. When the anti-detachment mechanism retracts, the restoring force of the elastic element enables the first sleeve to move slowly and stably, reducing the speed at which the anti-detachment mechanism retracts and preventing fasteners from falling off due to rapid retraction, thereby effectively reducing the risk of fasteners falling off.

[0011] In one embodiment, the anti-detachment mechanism further includes a second sleeve, which is slidably disposed within the inner cavity of the first sleeve. The side of the second sleeve facing the base is connected to the other end of the connecting rod, and the side of the second sleeve facing away from the base has a receiving groove for installing a fastener, the receiving groove being adapted to the cross-sectional shape of the fastener. Providing a second sleeve for installing the fastener within the receiving groove reduces the risk of the fastener detaching from the anti-detachment mechanism during movement, thus improving performance reliability.

[0012] In one embodiment, the anti-detachment mechanism further includes a magnetic element disposed within the inner cavity of the second sleeve and located on one side of the receiving groove. The magnetic force of the magnetic element attracts the fastener, improving the installation stability of the fastener within the second sleeve and further reducing the risk of the fastener detaching from the anti-detachment mechanism.

[0013] In one embodiment, the connecting rod includes a main body and a plug-in portion. One end of the main body is used to connect with the driving member, and the plug-in portion is disposed at the other end of the main body and inserted into the inner cavity of the second sleeve. This makes the installation and disassembly of the connecting rod and the second sleeve more convenient and improves the connection stability between the connecting rod and the second sleeve.

[0014] In one embodiment, the inner cavity of the first sleeve includes a first chamber and a second chamber that are connected to each other, and the first chamber and the second chamber are arranged sequentially along the axial direction of the first sleeve; the first chamber is located on one side of the first mounting groove and communicates with the first mounting groove; the second sleeve is slidably disposed in the second chamber.

[0015] In one embodiment, the inner diameter of the first chamber is smaller than the inner diameter of the second chamber, and the inner diameter of the first chamber is equal to the outer diameter of the connecting rod. This ensures that when the connecting rod moves within the first chamber, the connecting rod and the first chamber form a tight fit, thereby reducing the risk of the connecting rod shifting or wobbling during operation and improving the stability of the tightening operation.

[0016] In one embodiment, the anti-detachment mechanism further includes a mounting base disposed on the side of the base facing the first sleeve and opposite to the first sleeve. The mounting base has a first through hole and a second mounting groove. The first through hole is for the connecting rod to pass through, and the second mounting groove communicates with the first through hole and is opposite to the first mounting groove. The second end of the elastic element is accommodated in the second mounting groove. This ensures that the elastic element is securely positioned between the base and the first sleeve, thereby ensuring that the elastic element can properly perform its cushioning function and preventing a decrease or failure in cushioning performance due to loosening or misalignment.

[0017] In one embodiment, the anti-detachment mechanism further includes a clamping member, which comprises a clamping body and a first adjusting member. The clamping body is sleeved on the connecting rod and has a first opening slot. The first adjusting member passes through the first opening slot and is used to adjust the tightness between the clamping body and the connecting rod. This prevents the connecting rod from loosening or shifting during rotation or movement, improving the stability and reliability of the anti-detachment mechanism.

[0018] In one embodiment, the base includes a first side plate, a second side plate, and a connecting plate. The first and second side plates are spaced apart along the axial direction of the connecting rod, and the connecting plate connects the first and second side plates. The first side plate has a first mounting hole for the connecting rod to pass through, and the second side plate has a second mounting hole for the connecting rod to pass through. The first and second mounting holes are arranged opposite to each other. This improves the overall structural stability of the anti-detachment mechanism.

[0019] A fastener tightening device includes a drive member and an anti-loosening mechanism as described above. The drive member is connected to the end of the connecting rod away from the first sleeve. By employing the anti-loosening mechanism of any of the above embodiments in the fastener tightening device, when the anti-loosening mechanism retracts, the restoring force of the elastic element allows the first sleeve to move slowly and steadily, reducing the speed at which the anti-loosening mechanism retracts and preventing the fastener from falling off due to rapid retraction, thereby effectively reducing the risk of fastener detachment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the anti-fall-off mechanism provided in one embodiment of this application during use.

[0021] Figure 2 This is a schematic diagram of the anti-detachment mechanism provided in an embodiment of this application in its initial state.

[0022] Figure 3 This is a schematic diagram of the anti-detachment mechanism provided in an embodiment of this application in a compressed state.

[0023] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0024] Reference numerals: 10, base; 11, first bracket; 111, first side plate; 112, second side plate; 113, connecting plate; 12, second bracket; 20, connecting rod; 21, main body; 22, insertion part; 30, first sleeve; 31, first mounting groove; 32, first chamber; 33, second chamber; 40, second sleeve; 41, receiving groove; 50, elastic element; 60, magnetic element; 70, mounting seat; 80, clamping element; 81, clamping body; 811, first opening groove; 812, third through hole; 83, first adjusting element; 90, coupling; 91, coupling body; 911, second through hole; 912, second opening groove; 913, fourth through hole; 92, second adjusting element; 100, anti-falling mechanism; 200, simulated test piece; 300, support element. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship 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.

[0027] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0031] As mentioned in the background section, fasteners are prone to falling off during the tightening process inside the cavity, causing a series of production problems. Currently, the industry generally uses negative pressure adsorption, which generates negative pressure through vacuum equipment and uses the pressure difference to adsorb the fasteners, thereby reducing the risk of fasteners falling off. However, this method requires equipment such as vacuum pumps and air pipes, resulting in high investment costs and a large space requirement.

[0032] To address the aforementioned problems, this application provides a fastener tightening device, including a drive component and an anti-loosening mechanism. The fastener is threaded and includes, but is not limited to, bolts and screws. The drive component provides rotational power. The anti-loosening mechanism supports the fastener and, in conjunction with the rotational power provided by the drive component, rotates the fastener to tighten it into the threaded hole. The fastener tightening device provided by this application has a simple structure, occupies little space, and has a low risk of fastener detachment, thus helping to improve production efficiency and reduce safety hazards.

[0033] Please see Figures 1 to 3 , Figure 1 This diagram shows a schematic representation of the anti-detachment mechanism 100 in use according to one embodiment of the present application. Figure 2 This diagram shows a schematic representation of the anti-detachment mechanism 100 in its initial state according to an embodiment of this application. Figure 3 This diagram illustrates the structure of the anti-detachment mechanism 100 in a compressed state according to an embodiment of this application. The anti-detachment mechanism 100 provided in this embodiment includes a base 10, a connecting rod 20, a first sleeve 30, a second sleeve 40, and an elastic element 50. The connecting rod 20 is disposed through the base 10, and one end of the connecting rod 20 is connected to a driving element. The connecting rod 20 can rotate under the drive of the driving element. The first sleeve 30 is slidably sleeved on the other end of the connecting rod 20. A first mounting groove 31 is formed on the side of the first sleeve 30 facing the base 10, communicating with the inner cavity of the first sleeve 30, and the opening of the first mounting groove 31 faces the base 10. The second sleeve 40 is slidably disposed in the inner cavity of the first sleeve 30. The side of the second sleeve 40 facing the base 10 is connected to the other end of the connecting rod 20. A receiving groove 41 is formed on the side of the second sleeve 40 facing away from the base 10, for mounting fasteners. The elastic element 50 is sleeved on the connecting rod 20 and located between the base 10 and the first sleeve 30; the elastic element 50 has a first end and a second end opposite to each other, wherein the first end is accommodated in the first mounting groove 31 and the second end abuts against the side of the base 10 facing the first sleeve 30.

[0034] Understandably, when the anti-loosening mechanism 100 moves and the first sleeve 30 encounters external resistance, the first sleeve 30 moves towards the base 10 and compresses the elastic element 50. The elastic element 50 is gradually compressed and stores elastic potential energy. After the tightening operation is completed, the anti-loosening mechanism 100 retracts, and the compressed elastic element 50 begins to release the stored elastic potential energy, pushing the first sleeve 30 away from the base 10. The buffering effect of the elastic element 50 allows the first sleeve 30 to move slowly and stably, reducing the speed at which the anti-loosening mechanism 100 retracts and preventing the fastener from falling off due to rapid retraction, thereby effectively reducing the risk of fastener falling off.

[0035] During the tightening process using the anti-loosening mechanism 100, the fastener is installed within the receiving groove 41 of the second sleeve 40. The second sleeve 40 can limit the fastener in the circumferential direction, preventing the fastener from rotating relative to the second sleeve 40 in the circumferential direction. This allows the connecting rod 20 and the second sleeve 40 to drive the fastener to rotate and tighten. The second sleeve 40 also improves the stability of the fastener installed on the anti-loosening mechanism 100, reducing the risk of the fastener falling off.

[0036] In some embodiments, the elastic element 50 is a spring. In other embodiments, the elastic element 50 may also be an object made of materials such as rubber elastomers or silicone elastomers, and is not limited thereto.

[0037] In some embodiments, the anti-detachment mechanism 100 further includes a magnetic element 60, which is disposed in the inner cavity of the second sleeve 40 and located on one side of the receiving groove 41. When the fastener is installed in the receiving groove 41, the magnetic element 60 magnetically attracts the fastener, allowing the fastener to be stably installed in the receiving groove 41. During the movement of the anti-detachment mechanism 100, the attraction force of the magnetic element 60 can effectively prevent the fastener from falling off due to vibration or gravity. In this embodiment, the magnetic element 60 is a magnet; in other embodiments, the magnetic element 60 may be other magnetic objects, and is not limited thereto.

[0038] In some embodiments, the receiving groove 41 is connected to the inner cavity of the second sleeve 40, allowing the fastener installed in the receiving groove 41 to directly contact the magnetic component 60, thereby enhancing the adsorption effect on the fastener. The receiving groove 41 is adapted to the cross-sectional shape of the fastener, allowing the fastener to be precisely embedded in the receiving groove 41. The tight fit between the receiving groove 41 and the fastener reduces the risk of the fastener falling off during operation.

[0039] Please refer to the following: Figure 4 , Figure 4 It shows Figure 3 In the enlarged schematic diagram at point A, in some embodiments, the connecting rod 20 includes a main body 21 and a plug-in part 22. The main body 21 has a third end and a fourth end opposite to each other. The third end is used to connect with the driving member. The plug-in part 22 is disposed at the fourth end and inserted into the inner cavity of the second sleeve 40, which facilitates the installation and disassembly of the connecting rod 20 and the second sleeve 40 and helps to improve the connection stability of the connecting rod 20 and the second sleeve 40.

[0040] In some embodiments, the inner cavity of the first sleeve 30 includes a first chamber 32 and a second chamber 33, which are connected and arranged sequentially along the axial direction of the first sleeve 30. The first chamber 32 is located on one side of the first mounting groove 31 and is in communication with the first mounting groove 31; the second sleeve 40 is slidably disposed in the second chamber 33.

[0041] In some embodiments, the inner diameter of the first chamber 32 is smaller than the inner diameter of the second chamber 33, and the inner diameter of the first chamber 32 is equal to the outer diameter of the connecting rod 20. This allows the connecting rod 20 and the first chamber 32 to form a tight fit when the connecting rod 20 moves within the first chamber 32, thereby reducing the risk of the connecting rod 20 shifting or shaking during operation and improving the stability of the tightening operation.

[0042] In some embodiments, the anti-detachment mechanism 100 further includes a mounting base 70; the mounting base 70 is disposed on the side of the base 10 facing the first sleeve 30 and is disposed opposite to the first sleeve 30. The mounting base 70 has a first through hole and a second mounting groove, wherein the first through hole is used for the connecting rod 20 to pass through; the second mounting groove communicates with the first through hole and is disposed opposite to the first mounting groove 31 of the first sleeve 30. The first end of the elastic member 50 is received in the first mounting groove 31 of the first sleeve 30, and the second end of the elastic member 50 is received in the second mounting groove, so that the elastic member 50 can be stably disposed between the base 10 and the first sleeve 30, thereby ensuring that the elastic member 50 can play a normal buffering role and avoiding the elastic member 50 from losing buffering performance or failing due to loosening or misalignment.

[0043] In some embodiments, the anti-detachment mechanism 100 further includes a clamping member 80; the clamping member 80 includes a clamping body 81 and a first adjusting member 83. The clamping body 81 is sleeved on the connecting rod 20. The clamping body 81 has at least one first opening groove 811 and at least two third through holes 812. The two third through holes 812 are respectively disposed on both sides of the first opening groove 811. The first adjusting member 83 is inserted through the two third through holes 812 and passes through the first opening groove 811 to adjust the tightness between the clamping body 81 and the connecting rod 20, thereby preventing the connecting rod 20 from loosening or shifting during rotation or movement, and improving the stability and reliability of the anti-detachment mechanism 100.

[0044] In some embodiments, the base 10 includes a first bracket 11 and a second bracket 12, which are arranged sequentially along the axial direction of the connecting rod 20 and are both used to support the connecting rod 20; wherein, the second bracket 12 is detachably connected to the side of the first bracket 11 away from the first sleeve 30, and the second bracket 12 is used to install and support other devices or components.

[0045] In some embodiments, the first bracket 11 includes a first side plate 111, a second side plate 112, and a connecting plate 113. The first side plate 111 and the second side plate 112 are spaced apart along the axial direction of the connecting rod 20, and the connecting plate 113 connects the first side plate 111 and the second side plate 112. The first side plate 111 has a first mounting hole for the connecting rod 20 to pass through; the second side plate 112 has a second mounting hole for the connecting rod 20 to pass through; the first mounting hole and the second mounting hole are arranged opposite to each other. In some embodiments, the clamping body 81 is sleeved on the connecting rod 20 and disposed on the first side plate 111 or the second side plate 112 to enhance the overall structural stability of the anti-detachment mechanism 100.

[0046] In some embodiments, the anti-detachment mechanism 100 further includes a coupling 90, which has a second through hole 911 extending axially along the coupling 90. One end of the connecting rod 20 away from the first sleeve 30 is inserted into the second through hole 911. The second through hole 911 is also used for inserting the output end of the drive member to enhance the connection stability between the output end of the drive member and the connecting rod 20.

[0047] In some embodiments, the coupling 90 includes a coupling body 91 and a second adjusting member 92. A second through hole 911 is formed in the coupling body 91 and extends axially along the coupling body 91 for inserting the connecting rod 20 and the output end of the driving member. The coupling body 91 has at least one second opening slot 912 and at least two fourth through holes 913, with the two fourth through holes 913 respectively disposed on both sides of the second opening slot 912. The second adjusting member 92 is inserted through the two fourth through holes 913 and passes through the second opening slot 912 to adjust the tightness between the coupling body 91 and the connecting rod 20 and the output end of the driving member, preventing the connecting rod 20 from loosening or shifting during rotation or movement, and improving the stability and reliability of the anti-detachment mechanism 100.

[0048] In use, the fastener is first installed in the receiving groove 41 of the second sleeve 40. The anti-detachment mechanism 100 moves, causing the first sleeve 30 to extend into the cavity of the simulated test piece 200 and contact the support 300. The anti-detachment mechanism 100 continues to move closer to the support 300. The first sleeve 30 is resisted by the support 300 and moves closer to the base 10, and the elastic element 50 is gradually compressed. The driving component drives the connecting rod 20 to rotate, and the second sleeve 40 rotates together under the drive of the connecting rod 20, so that the fastener rotates and is tightened on the support 300. After the tightening operation is completed, the anti-detachment mechanism 100 withdraws. The buffering effect of the elastic element 50 allows the first sleeve 30 to move slowly and steadily away from the support 300, reducing the speed at which the anti-detachment mechanism 100 leaves the support 300 and avoiding fastener detachment due to rapid withdrawal, effectively reducing the risk of fastener detachment.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An anti-detachment mechanism, characterized in that, The anti-fall-off mechanism includes: Base A connecting rod is provided through the base, and one end of the connecting rod is connected to the driving component; A first sleeve is slidably fitted onto the other end of the connecting rod; the first sleeve has a first mounting groove on its side facing the base, communicating with the inner cavity of the first sleeve, and the opening of the first mounting groove faces the base; and, An elastic element is sleeved on the connecting rod, with one end of the elastic element housed in the first mounting groove and the other end abutting against the base.

2. The anti-fall-off mechanism according to claim 1, characterized in that, The anti-detachment mechanism further includes a second sleeve, which is slidably disposed in the inner cavity of the first sleeve; the side of the second sleeve facing the base is connected to the other end of the connecting rod, and the side of the second sleeve facing away from the base is provided with a receiving groove for installing fasteners, the receiving groove being adapted to the cross-sectional shape of the fasteners.

3. The anti-fall-off mechanism according to claim 2, characterized in that, The anti-fall-off mechanism also includes a magnetic component, which is disposed in the inner cavity of the second sleeve and located on one side of the receiving groove.

4. The anti-detachment mechanism according to claim 2, characterized in that, The connecting rod includes a main body and a plug-in part. One end of the main body is used to connect with the driving member, and the plug-in part is disposed at the other end of the main body and inserted into the inner cavity of the second sleeve.

5. The anti-fall-off mechanism according to claim 2, characterized in that, The inner cavity of the first sleeve includes a first chamber and a second chamber that are connected to each other. The first chamber and the second chamber are arranged sequentially along the axial direction of the first sleeve. The first chamber is located on one side of the first mounting groove and is connected to the first mounting groove. The second sleeve is slidably disposed in the second chamber.

6. The anti-detachment mechanism according to claim 5, characterized in that, The inner diameter of the first chamber is smaller than the inner diameter of the second chamber, and the inner diameter of the first chamber is equal to the outer diameter of the connecting rod.

7. The anti-detachment mechanism according to claim 1, characterized in that, The anti-detachment mechanism further includes a mounting base, which is disposed on the side of the base facing the first sleeve and is disposed opposite to the first sleeve; the mounting base has a first through hole and a second mounting groove, the first through hole is used for the connecting rod to pass through, the second mounting groove communicates with the first through hole and is disposed opposite to the first mounting groove; the second end of the elastic element is accommodated in the second mounting groove.

8. The anti-fall-off mechanism according to claim 1, characterized in that, The anti-detachment mechanism further includes a clamping component, which includes a clamping body and a first adjusting component. The clamping body is sleeved on the connecting rod and has a first opening groove. The first adjusting component passes through the first opening groove and is used to adjust the tightness between the clamping body and the connecting rod.

9. The anti-fall-off mechanism according to claim 1, characterized in that, The base includes a first side plate, a second side plate, and a connecting plate. The first side plate and the second side plate are spaced apart along the axial direction of the connecting rod, and the connecting plate connects the first side plate and the second side plate. The first side plate has a first mounting hole for the connecting rod to pass through, and the second side plate has a second mounting hole for the connecting rod to pass through. The first mounting hole and the second mounting hole are arranged opposite to each other.

10. A fastener tightening device, characterized in that, It includes a drive component and an anti-detachment mechanism as described in any one of claims 1 to 9, wherein the drive component is connected to the end of the connecting rod away from the first sleeve.

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