Thread locking mechanism

Abstract

The present invention relates to the technical field of universal parts, and provides a threaded locking mechanism comprising: an end fixing plate, at least one plate to be locked, a sleeve, and a locking module, wherein the end fixing plate and the plate to be locked are stacked, and the end fixing plate is located at the outermost end; the sleeve is passed through all the plates to be locked, and a fixing mechanism is provided between the first end of the sleeve and the end fixing plate, the fixing mechanism being adapted to limit axial rotation of the sleeve, the sleeve being provided with an abutment portion, the abutment portion abutting against the plate to be locked located at the outermost end; the locking module comprising a threaded locking member, the threaded locking member being passed through the sleeve to lock the end fixing plate and all the plates to be locked. The threaded locking mechanism provided by the present invention can solve the defects of the prior art in that when the bolt (screw) is tightened, the force generated by the rotation of the bolt (screw) acts on the plate, causing displacement between the plates and low positioning accuracy between the plates, thereby significantly improving the locking accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of universal parts, and in particular to a thread locking mechanism. Background Art

[0002] Bolt (screw) locking is a fastening method widely used in various fields and industries. The locking effect is achieved by the threaded fit between the external thread of the bolt (screw) and the threaded hole (internal thread).

[0003] In existing technology, bolts (or screws) are typically used to secure stacked multilayer boards (or plate-like components on components, hereinafter the same). The thickness of the multilayer boards can be adjusted based on actual needs. Currently used locking methods are sufficient for applications where the positioning accuracy between the boards after locking is not critical. However, when high precision is required between the boards before and after locking, current locking methods cannot meet the performance requirements.

[0004] Therefore, a thread locking mechanism is urgently needed to solve the above problems. Summary of the Invention

[0005] The present invention provides a thread locking mechanism, which can solve the defects in the prior art that when the bolt (screw) is locked and tightened, the force generated by the rotation of the bolt (screw) acts on the plate, causing displacement between the plates and low positioning accuracy between the plates, thereby greatly improving the locking accuracy.

[0006] The present invention provides a thread locking mechanism, comprising: an end fixing plate, at least one plate to be locked, a sleeve and a locking module, wherein the end fixing plate and the plate to be locked are stacked, and the end fixing plate is located at the outermost end;

[0007] The sleeve is passed through all the plates to be locked, a fixing mechanism is provided between the first end of the sleeve and the end fixing plate, the fixing mechanism is adapted to limit the axial rotation of the sleeve, and the sleeve is provided with an abutment portion, the abutment portion abutting against the plate to be locked located at the outermost end;

[0008] The locking module includes a threaded locking member, which is passed through the sleeve to lock the end fixing plate and all the plates to be locked.

[0009] According to the thread locking mechanism provided by the present invention, the fixing mechanism is a clamping fixing mechanism.

[0010] According to the thread locking mechanism provided by the present invention, the clamping and fixing mechanism includes a clamping groove and a clamping portion that cooperate with each other, one of the clamping groove and the clamping portion is provided on the end fixing plate, and the other is provided on the sleeve.

[0011] According to the thread locking mechanism provided by the present invention, the fixing mechanism is a plug-in fixing mechanism.

[0012] According to the thread locking mechanism provided by the present invention, the plug-in fixing mechanism includes a slot and a plug-in portion that cooperate with each other, one of the slot and the plug-in portion is provided on the end fixing plate, and the other is provided on the sleeve.

[0013] According to the thread locking mechanism provided by the present invention, the fixing mechanism is a friction pair fixing mechanism.

[0014] According to the thread locking mechanism provided by the present invention, the friction pair fixing mechanism includes a top screw and a fixing hole provided on the end fixing plate, the top screw is passed through the fixing hole, and the first end of the top screw abuts against the outer wall of the sleeve.

[0015] According to the thread locking mechanism provided by the present invention, the thread locking member is a bolt or a screw, and the end fixing plate is provided with a threaded hole threadedly connected to the bolt or the screw.

[0016] According to the thread locking mechanism provided by the present invention, the thread locking member is a bolt or a screw, and the locking module further includes a nut. The rod of the bolt or screw passes through the sleeve and the end fixing plate and cooperates with the nut thread.

[0017] According to the thread locking mechanism provided by the present invention, the thread locking member is a screw, and the locking module further includes a nut. The screw is passed through the sleeve and the end fixing plate, and both ends of the screw are respectively threadedly engaged with the nut.

[0018] The thread locking mechanism provided by the present invention adds a sleeve on the basis of the existing thread locking mechanism. When locking, the sleeve can be limited and fixed by the fixing mechanism between the sleeve and the end fixing plate, so that it cannot rotate axially, and the stacked end fixing plate and the plate to be locked are locked and tightened by the locking module. During the locking process, the force in the rotational direction applied to the threaded fastener can only be transmitted to the sleeve, and the sleeve remains relatively fixed with the end fixing plate. The sleeve only generates a downward tightening force on each plate to be locked, so that each plate to be locked is not affected by the force in the rotational direction, preventing the plate to be locked from slight displacement when locking, and greatly improving the locking accuracy.

[0019] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of an embodiment of a thread locking mechanism provided by the present invention;

[0022] Figure 2 is a cross-sectional view of an embodiment of a thread locking mechanism provided by the present invention;

[0023] Figure 3 This is one of the schematic diagrams of one embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0024] Figure 4 This is one of the schematic diagrams of a sleeve in one embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0025] Figure 5 This is a second schematic diagram of a sleeve in one embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0026] Figure 6 This is one of the schematic diagrams of the second embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0027] Figure 7 This is a second schematic diagram of the second embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0028] Figure 8 This is one of the schematic diagrams of the sleeve of the second embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0029] Figure 9 This is a second schematic diagram of a sleeve in a second embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0030] Figure 10 It is a schematic diagram of the third embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0031] Figure 11 This is one of the schematic diagrams of the sleeve of the third embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0032] Figure 12 This is the second schematic diagram of the sleeve of the third embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0033] Figure 13 This is a third schematic diagram of a sleeve in the third embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0034] Figure 14 This is a fourth schematic diagram of the sleeve of the third embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0035] Figure 15 This is one of the schematic diagrams of the fourth embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0036] Figure 16 This is the second schematic diagram of the fourth embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0037] Figure 17 This is one of the schematic diagrams of the sleeve of the fourth embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0038] Figure 18 This is the second schematic diagram of the sleeve of the fourth embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0039] Figure 19 This is the third schematic diagram of the sleeve of the fourth embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0040] Figure 20 This is a fourth schematic diagram of a sleeve of a fourth embodiment of the clamping and fixing mechanism in the thread locking mechanism provided by the present invention;

[0041] Figure 21 It is a schematic diagram of one embodiment of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention;

[0042] Figure 22 It is a schematic diagram of an end fixing plate of one embodiment of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention;

[0043] Figure 23 This is one of the schematic diagrams of a sleeve in one embodiment of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention;

[0044] Figure 24 This is a second schematic diagram of a sleeve in one embodiment of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention;

[0045] Figure 25 It is a schematic diagram of the second embodiment of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention;

[0046] Figure 26It is a schematic diagram of an end fixing plate of a second embodiment of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention;

[0047] Figure 27 This is one of the schematic diagrams of the sleeve of the second embodiment of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention;

[0048] Figure 28 This is a second schematic diagram of a sleeve in the second embodiment of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention;

[0049] Figure 29 It is a schematic diagram of an embodiment of a friction pair fixing mechanism in a thread locking mechanism provided by the present invention;

[0050] Figure 30 This is one of the schematic diagrams of the sleeve of the friction pair fixing mechanism in the thread locking mechanism provided by the present invention;

[0051] Figure 31 This is the second schematic diagram of the sleeve of the friction pair fixing mechanism in the thread locking mechanism provided by the present invention;

[0052] Figure 32 This is one of the schematic diagrams of the thread locking mechanism in the prior art;

[0053] Figure 33 This is the second schematic diagram of the thread locking mechanism in the prior art;

[0054] Figure 34 This is the third schematic diagram of a thread locking mechanism in the prior art;

[0055] Figure 35 This is the fourth schematic diagram of the thread locking mechanism in the prior art;

[0056] Figure 36 This is the fifth schematic diagram of the thread locking mechanism in the prior art;

[0057] Figure 37 This is the sixth schematic diagram of the thread locking mechanism in the prior art.

[0058] Reference numerals:

[0059] 1. End fixing plate; 2. Plate to be locked; 3. Sleeve; 301. Abutment portion; 4. Threaded locking member; 5. Clamping portion; 6. Clamping groove; 7. Inserting portion; 8. Slot; 9. Top screw; 10. First plate; 11. Second plate. DETAILED DESCRIPTION

[0060] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0061] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0062] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0063] Overview of existing technology:

[0064] Take the locking and fixing of two plates as an example, namely the first plate 10 (top plate in the figure, the same below) and the second plate 11 (bottom plate in the figure, the same below), please refer to Figures 32 to 37 .

[0065] When the first plate 10 and the second plate 11 need to be fastened together, Figure 32 As shown, the first plate 10 can be fixed to the second plate 11 by machining a bolt (screw) through hole on the first plate 10 and machining an internal threaded hole on the second plate 11. Figure 33 As shown, the first plate 10 and the second plate 11 can also be fastened by machining bolt (screw) holes on the first plate 10 and the second plate 11, and using nuts and bolt (screw) threads at the bottom to match. Figure 34As shown, it is also possible to process bolt (screw) holes on the first plate 10, process internal threaded holes on the second plate 11, and then use a double-headed stud, one end of which is threadedly engaged with the second plate 11 and the other end is fixed with a nut.

[0066] like Figure 35 and Figure 36 As shown, when the bolt (screw) is first tightened, the shoulder of the bolt (screw) contacts the first plate 10. As the tightening continues, friction between the shoulder and the surface of the first plate 10 is generated in the rotational direction. At the same time, there is a gap between the bolt (screw) and the through hole of the first plate 10, and the thread rotation has a radial motion component. Under the action of friction and radial motion components, the first plate 10 and the second plate 11 will not only experience axial displacement, but also other slight displacement changes. As the tightening force continues to increase, the displacement will gradually decrease until the tightening is completed (the required tightening force is reached).

[0067] Similarly, the fixing method of stud bolts with nuts, such as Figure 37 As shown, the bottom of the nut contacts the first plate 10. When tightening, under the influence of friction, radial motion component and stud through-hole clearance, the first plate 10 and the second plate 11 will produce other slight displacement changes in addition to axial displacement until the tightening is completed (the required tightening force is reached).

[0068] It can be seen that the currently commonly used locking method can achieve the desired effect when the positioning accuracy of the first and second plates 10, 11 after locking is not required to be high. However, when the positioning accuracy of the first and second plates 10, 11 before and after locking is required to be high, the current locking method cannot meet the performance requirements.

[0069] In view of this, the present invention provides a thread locking mechanism to solve the above problem.

[0070] The following combination Figures 1 to 31 The thread locking mechanism provided by the present invention is described.

[0071] like Figure 1 and Figure 2 As shown, the present invention provides a threaded locking mechanism, comprising: an end fixing plate 1, at least one plate to be locked 2, a sleeve 3 and a locking module, wherein the end fixing plate 1 and the plate to be locked 2 are stacked, and the end fixing plate 1 is located at the outermost end; the sleeve 3 is passed through all the plates to be locked 2, and a fixing mechanism is provided between the first end of the sleeve 3 and the end fixing plate 1, the fixing mechanism is suitable for limiting the axial rotation of the sleeve 3, the sleeve 3 is provided with an abutment portion 301, and the abutment portion 301 abuts against the plate to be locked 2 located at the outermost end; the locking module comprises a threaded locking member 4, the threaded locking member 4 is passed through the sleeve 3 to lock the end fixing plate 1 and all the plates to be locked 2.

[0072] like Figure 1 and Figure 2 As shown, in the thread locking mechanism of this embodiment, the number of plates 2 to be locked is shown as one. The plates 2 to be locked are positioned above the end fixing plate 1, and the two are stacked. Of course, in some embodiments, the number of plates 2 to be locked may also be multiple (two or more).

[0073] In this embodiment, a boss is provided on the second end of the sleeve 3. During locking, the lower surface of the boss serves as an abutment portion 301, which abuts against the outer surface of the outermost plate 2 to be locked, thereby providing a compressive force on the plate 2 to be locked. The boss can be circular, square, or other shapes, depending on the application, and is not specifically limited in this invention.

[0074] In some embodiments, the boss can also be arranged at a position between the first end and the second end of the sleeve 3 (for example, the middle part), as long as its lower bottom surface can abut against the outer surface of the locking plate 2 located at the outermost end during the locking and fixing process, it can provide a clamping force to the locking plate 2.

[0075] The thread locking mechanism provided by the present invention adds a sleeve 3 on the basis of the existing thread locking mechanism. When locking, the sleeve 3 can be limited and fixed by the fixing mechanism between the sleeve 3 and the end fixing plate 1, so that it cannot rotate axially, and the stacked end fixing plate 1 and the plate to be locked 2 are locked and fastened by the locking module. During the locking process, the force in the rotational direction applied to the threaded fastener can only be transmitted to the sleeve 3, and the sleeve 3 remains relatively fixed with the end fixing plate 1. The sleeve 3 only generates a downward tightening force on each plate to be locked 2, so that each plate to be locked 2 is not affected by the force in the rotational direction, preventing the plate to be locked 2 from slight displacement when locking, thereby improving the locking accuracy.

[0076] It should be noted that the above-mentioned end fixing plate 1 and the plate to be locked 2 can be independent plate-shaped components, or can be plate-shaped connecting parts on other components.

[0077] In a specific embodiment of the present invention, the fixing mechanism can be a clamping fixing mechanism. That is, the sleeve 3 and the end fixing plate 1 are fixed by clamping to limit the axial rotation of the sleeve 3. The following is a detailed description of various embodiments of the clamping fixing mechanism in the thread locking mechanism provided by the present invention. Please refer to Figures 3 to 20 .

[0078] Implementation method 1: Figures 3 to 5As shown, in this embodiment, the clamping and fixing mechanism includes a clamping groove 6 provided on the end fixing plate 1 and a clamping portion 5 provided on the sleeve 3. Specifically, the outer wall of the first end of the sleeve 3 is provided with at least one raised limit key as the clamping portion 5, and the inner surface of the end fixing plate 1 (the side surface adjacent to the plate to be locked 2, the same below) is provided with a recessed groove, and the inner wall of the recessed groove is provided with at least one clamping groove 6 corresponding to the limit key. During the locking and fixing process, the limit key located at the first end of the sleeve 3 is clamped into the clamping groove 6 located on the inner wall of the recessed groove to play a role in limiting and fixing the sleeve 3 and preventing it from axial rotation. The bottom of the recessed groove is provided with a through hole (through hole or threaded hole) suitable for the threaded locking member 4 to pass through.

[0079] In practice, the shape and depth of the recessed groove on the inner surface of the end fixing plate 1 may be modified as appropriate, provided that functional requirements are met. Generally, a gap of 0.5 mm or greater is provided between the bottom of the recessed groove and the bottom of the sleeve 3, ensuring no contact or interference. This gap ensures that only the abutment portion 301 of the sleeve 3 contacts the plate to be locked and transmits the vertical locking force. If there is contact or interference between the bottom of the sleeve 3 and the bottom of the recessed groove, the vertical locking force cannot be transmitted to the plate to be locked.

[0080] In some embodiments, the single-sided gap between the slot 6 and the limit key is greater than or equal to 0.5 mm, which facilitates assembly, and the gap set at this position does not affect the limiting function of the sleeve 3.

[0081] like Figure 4 and Figure 5 As shown, in the first embodiment of the clamping and fixing mechanism, the outer wall shape of the sleeve 3 can be set to a circular, square, or other specific shape, and the shape of the recessed groove can also be set to a circular, square, or other specific shape accordingly, which is not specifically limited by the present invention. The limit key can be integrated with the sleeve 3, or it can be configured as a separate key and sleeve structure, and the limit key can be fixed to the sleeve 3 using a process such as bonding, welding, interference fit, etc.

[0082] Implementation method 2: Figures 6 to 9 As shown, in this embodiment, the snap-fit ​​fixing mechanism includes a slot 6 provided in the sleeve 3 and a snap-fit ​​portion 5 provided on the end fixing plate 1. Specifically, the outer wall of the first end of the sleeve 3 is provided with at least one groove serving as the slot 6, and the inner surface of the end fixing plate 1 is provided with a recessed groove, with at least one protrusion provided on a corresponding position on the inner wall of the recessed groove serving as the snap-fit ​​portion 5. During the locking and fixing process, the slot 6 at the first end of the sleeve 3 is snapped into the snap-fit ​​portion 5 on the inner wall of the recessed groove, thereby limiting and fixing the sleeve 3 and preventing axial rotation.

[0083] like Figure 8 and Figure 9As shown, in the second embodiment of the clamping fixing mechanism, the outer wall shape of the sleeve 3 can be set to circular, square and other specific shapes, and the shape of the sink groove can also be set to circular, square and other specific shapes accordingly, and the present invention does not make specific limitations on this.

[0084] Implementation method three: Figures 10 to 14 As shown, in this embodiment, a serrated structure can be provided at the first end of the sleeve 3, and a corresponding serrated recessed groove can be provided on the inner surface of the end fixing plate 1, so that the serrations serve as the engaging portions 5, and the spaces between adjacent serrations serve as the retaining grooves 6, thereby utilizing toothed engagement for position limiting. The engaging length of the serrations can be one circle, half a circle, etc. (including but not limited to). During the locking and fixing process, the serrated structure at the first end of the sleeve 3 is engaged with the serrated recessed groove on the inner surface of the end fixing plate 1, thereby limiting and fixing the sleeve 3 and preventing axial rotation.

[0085] like Figures 11 to 14 As shown, in the third embodiment of the clamping fixing mechanism, a serrated structure can be directly provided on the first end of the sleeve 3, or a component with a serrated structure can be fixedly provided on the first end of the sleeve 3 by bonding, welding, interference fit, etc.

[0086] Implementation method 4: Figures 15 to 20 As shown, in this embodiment, the entire sleeve 3 or the first end of the sleeve 3 can be configured as a square, D-shaped, or other special-shaped structure, and a corresponding square, D-shaped, or other special-shaped recessed groove is provided on the inner surface of the end fixing plate 1, so that the square, D-shaped, or other special-shaped structure on the sleeve 3 serves as the clamping portion 5, and the square, D-shaped, or other special-shaped recessed groove on the inner surface of the end fixing plate 1 serves as the clamping groove 6. During the locking and fixing process, the square, D-shaped, or other special-shaped structure on the sleeve 3 is clamped into the square, D-shaped, or other special-shaped recessed groove on the inner surface of the end fixing plate 1, thereby limiting and fixing the sleeve 3 and preventing it from axial rotation.

[0087] In a specific embodiment of the present invention, the fixing mechanism can be a plug-in fixing mechanism. That is, the sleeve 3 and the end fixing plate 1 are fixed by plugging to limit the axial rotation of the sleeve 3. The following is a detailed description of various embodiments of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention. Please refer to Figures 21 to 28 .

[0088] Implementation method 1: Figures 21 to 24As shown, in this embodiment, the plug-in fixing mechanism includes a plug-in portion 7 provided on the end fixing plate 1 and a slot 8 provided on the sleeve 3. Specifically, a recessed groove is provided on the inner surface of the end fixing plate 1, with a positioning pin provided vertically at the bottom of the recessed groove, serving as the plug-in portion 7. The first end of the sleeve 3 is provided with a pin hole that matches the positioning pin, serving as the slot 8. During the locking and fixing process, the pin hole on the first end of the sleeve 3 is aligned with the positioning pin on the inner surface of the end fixing plate 1, so that the two are plugged and mated, thereby limiting the position of the sleeve 3 and preventing axial rotation.

[0089] like Figures 22 to 24 As shown, in the first embodiment of the plug-in fixing mechanism, the outer wall shape of the sleeve 3 can be set to a circular, square, or other specific shape, and the shape of the recess can also be set to a circular, square, or other specific shape accordingly, which is not specifically limited by the present invention. The number of positioning pins and pin holes can also be set as required.

[0090] Implementation method 2: Figures 25 to 28 As shown, in this embodiment, the plug-in fixing mechanism includes a slot 8 provided on the end fixing plate 1 and a plug-in portion 7 provided on the sleeve 3. Specifically, a positioning pin is vertically provided at the first end of the sleeve 3, serving as the plug-in portion 7. The inner surface of the end fixing plate 1 is provided with a recessed groove, the bottom of which is provided with a pin hole that matches the positioning pin and serves as the slot 8. During the locking and fixing process, the positioning pin on the first end of the sleeve 3 is aligned with the pin hole on the inner surface of the end fixing plate 1, and the two are plugged and matched to each other, thereby limiting the position of the sleeve 3 and preventing axial rotation.

[0091] In some embodiments, a recessed groove may be provided on the inner surface of the end fixing plate 1, and pin holes may be provided at corresponding positions of the inner wall of the recessed groove and the sleeve. When fixing, the first end of the sleeve is first placed in the recessed groove, and the pin is inserted into the pin holes located on the inner wall of the recessed groove and the sleeve to limit and fix the sleeve 3 and prevent it from axial rotation.

[0092] In a specific embodiment of the present invention, the fixing mechanism can be a friction pair fixing mechanism. That is, friction resistance is applied to the outer wall of the sleeve 3 to limit the axial rotation of the sleeve 3. The following is a detailed description of the implementation of the plug-in fixing mechanism in the thread locking mechanism provided by the present invention. Please refer to Figures 29 to 31 .

[0093] like Figures 29 to 31As shown, in this embodiment, the friction pair fixing mechanism includes a top screw 9 and a fixing hole provided in the end fixing plate 1. The top screw 9 is inserted into the fixing hole, and the first end of the top screw 9 abuts the outer wall of the sleeve 3. Specifically, the inner surface of the end fixing plate 1 is provided with a recessed groove to facilitate the placement of the sleeve 3 in the recessed groove, and the side wall of the end fixing plate 1 is provided with a fixing hole (threaded hole). When fixing, the first end of the sleeve 3 is placed in the recessed groove, and the top screw 9 is screwed into the fixing hole so that its first end abuts the outer wall of the sleeve 3. The top screw 9 applies a set amount of frictional resistance to the sleeve 3, thereby limiting and fixing the sleeve 3 and preventing it from rotating axially.

[0094] It is foreseeable that, in some embodiments, the sleeve 3 and the end fixing plate 1 may be fixed simultaneously using any two or more fixing methods among a snap-fit ​​fixing mechanism, a plug-fit fixing mechanism and a friction pair fixing mechanism.

[0095] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the threaded locking member 4 is a bolt or a screw, and the end fixing plate 1 is provided with a threaded hole that is threadedly connected to the bolt or the screw. Specifically, a through hole (for making way for the sleeve 3) can be provided at the corresponding position of the plate to be locked 2, and a threaded hole can be provided on the end fixing plate 1. When locking and fixing, the sleeve 3 is passed through the plate to be locked 2, and the bolt or the screw is passed through the sleeve 3, so that the bolt or the screw is directly screwed into the threaded hole provided at the bottom of the sink groove of the end fixing plate 1. The friction force generated when the bolt or the screw is locked acts on the bolt sleeve 3, and only the inward pressing force is applied to the plate to be locked 2 between the abutment portion 301 of the end fixing plate 1 and the sleeve 3 to achieve locking and fixing. In this process, the bolt or the screw will not apply a force in the rotational direction to the plate to be locked 2, which can prevent the plate to be locked 2 from slightly displacing during locking, thereby improving the locking accuracy.

[0096] In some embodiments of the present invention, the threaded locking member 4 is a bolt or a screw, and the locking module further includes a nut, the rod of the bolt or the screw being passed through the sleeve 3 and the end fixing plate 1 and being threadedly engaged with the nut. Specifically, a through hole (for making way for the sleeve 3) can be provided at the corresponding position of the plate 2 to be locked. When locking and fixing, the sleeve 3 is passed through the plate 2 to be locked, the bolt or the screw is passed through the sleeve 3, and is threadedly connected with the nut located on the side of the outer surface of the end fixing plate 1. The friction force generated by the bolt or the screw during locking acts on the bolt sleeve 3, and only an inward pressing force is applied to the plate 2 to be locked between the end fixing plate 1 and the abutment portion 301 of the sleeve 3 to achieve locking and fixing. In this process, the bolt or the screw will not apply a force in the rotational direction to the plate 2 to be locked, which can prevent the plate 2 to be locked from being slightly displaced during locking, thereby improving the locking accuracy.

[0097] In some embodiments of the present invention, the threaded locking member 4 is a screw, and the locking module further includes a nut. The screw is passed through the sleeve 3 and the end fixing plate 1, and the two ends of the screw are respectively engaged with the nut threads. Specifically, a through hole can be set at the corresponding position of the plate to be locked 2 (for making way for the sleeve 3). When locking and fixing, the sleeve 3 is passed through the plate to be locked 2, and the screw is passed through the sleeve 3. Then, two nuts are respectively engaged with the two ends of the screw threads to lock and fix the plate to be locked. The friction force generated by one of the nuts during locking acts on the bolt sleeve 3, and only an inward pressing force is applied to the plate to be locked 2 between the end fixing plate 1 and the abutment portion 301 of the sleeve 3 to achieve locking and fixing. In this process, the nut will not apply a force in the rotational direction to the plate to be locked 2, which can prevent the plate to be locked 2 from slightly displacing during locking, thereby improving the locking accuracy.

[0098] It can be seen from the description of the above embodiments that the thread locking mechanism provided by the present invention can only limit the end fixing plate 1 when locking and fixing, and then under the action of the fixing mechanism between the sleeve 3 and the end fixing plate 1, during the tightening process of the screws, bolts or nuts in the locking and fixing process, no force in the rotational direction is always generated on the locking plate 2. Under the basic premise of meeting the locking and tightening requirements, the effect of preventing the locking plate 2 from being slightly displaced is achieved, thereby improving the locking accuracy.

[0099] It should be noted that the thread locking mechanism provided by the present invention can be applied not only to fields with general precision requirements, but also to fields with high precision requirements (such as microscopic imaging equipment, medical equipment, and aerospace equipment, etc.).

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A thread locking mechanism, characterized in that: include: An end fixing plate, at least one plate to be locked, a sleeve and a locking module, wherein the end fixing plate and the plate to be locked are stacked and the end fixing plate is located at the outermost end; The sleeve is passed through all the plates to be locked, a fixing mechanism is provided between the first end of the sleeve and the end fixing plate, the fixing mechanism is adapted to limit the axial rotation of the sleeve, and the sleeve is provided with an abutment portion, the abutment portion abutting against the plate to be locked located at the outermost end; The locking module includes a threaded locking member, which is passed through the sleeve to lock the end fixing plate and all the plates to be locked.

2. The thread locking mechanism according to claim 1, characterized in that: The fixing mechanism is a snap-fit ​​fixing mechanism.

3. The thread locking mechanism according to claim 2, characterized in that: The clamping and fixing mechanism includes a clamping slot and a clamping portion that cooperate with each other. One of the clamping slot and the clamping portion is provided on the end fixing plate, and the other is provided on the sleeve.

4. The thread locking mechanism according to claim 1, wherein: The fixing mechanism is a plug-in fixing mechanism.

5. The thread locking mechanism according to claim 4, characterized in that: The plug-in fixing mechanism includes a slot and a plug-in portion that cooperate with each other, one of the slot and the plug-in portion is provided on the end fixing plate, and the other is provided on the sleeve.

6. The thread locking mechanism according to claim 1, wherein: The fixing mechanism is a friction pair fixing mechanism.

7. The thread locking mechanism according to claim 6, characterized in that: The friction pair fixing mechanism includes a top screw and a fixing hole provided on the end fixing plate. The top screw is passed through the fixing hole, and a first end of the top screw abuts against an outer wall of the sleeve.

8. The thread locking mechanism according to any one of claims 1 to 7, characterized in that: The threaded locking member is a bolt or a screw, and the end fixing plate is provided with a threaded hole threadedly connected to the bolt or the screw.

9. The thread locking mechanism according to any one of claims 1 to 7, characterized in that: The threaded locking member is a bolt or a screw, and the locking module further includes a nut. The rod of the bolt or the screw passes through the sleeve and the end fixing plate and is threadably matched with the nut.

10. The thread locking mechanism according to any one of claims 1 to 7, characterized in that: The threaded locking member is a screw, and the locking module further includes a nut. The screw is passed through the sleeve and the end fixing plate, and both ends of the screw are respectively threadably matched with the nut.

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