Anti-loosening screw and equipment connecting assembly

Abstract

The utility model relates to the technical field of fasteners, in particular to an anti-loosening screw and an equipment connecting assembly, the anti-loosening screw comprises a bolt column, a bolt cap, a nut and a gasket, the bolt column and the nut are connected and matched through a thread structure, and the nut is close to or away from the bolt cap in the axial direction of the bolt column through forward or reverse rotation. The gasket is arranged between the bolt cap and the nut and arranged on the outer side of the bolt column in a sleeving mode, a first limiting mechanism used for preventing the gasket from rotating relative to the bolt column in the circumferential direction is arranged between the gasket and the bolt column, and a second limiting mechanism used for preventing the nut from rotating reversely is arranged between the nut and the gasket. The nut and the bolt column can be prevented from accidentally rotating reversely after being connected, the situation that the nut and the bolt column are loosened due to shaking and the like is eradicated, and the connection stability of the fastener is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to an anti-loosening screw and an equipment connection component. Background Art

[0002] Fasteners are a general term for a type of mechanical parts used to fasten two or more parts (or components) into a whole. They are a type of mechanical parts used for fastening and connection and are extremely widely used.

[0003] Fasteners generally include bolts and nuts. After the bolts and nuts are connected, they are often prone to loosening due to shaking and other reasons, affecting the stability of the fastener connection effect.

[0004] Therefore, further improvement is needed to prevent the nut from loosening. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide an anti-loosening screw and an equipment connection assembly, which can effectively prevent the nut from loosening and improve the stability of the fastener connection.

[0006] One scheme of the utility model provides an anti-loosening screw, including a bolt column, a bolt cap, a nut and a washer, wherein the washer is arranged between the bolt cap and the nut, and the washer is sleeved on the outside of the bolt column. A first limiting mechanism for preventing the washer from rotating relative to the bolt column in a circumferential direction is provided between the washer and the bolt column, and a second limiting mechanism for preventing the nut from rotating in the reverse direction is provided between the nut and the washer; the second limiting mechanism includes a one-way limiting pin connected and cooperated with the nut and a plurality of limiting teeth arranged on the washer.

[0007] The beneficial effect of this solution is that by providing a washer, accidental reverse rotation after the nut and the bolt column are connected can be avoided, loosening between the nut and the bolt column due to shaking and the like can be prevented, and the stability of the anti-loosening screw connection can be improved.

[0008] In one of the schemes, the limiting teeth are distributed along the circumference of the washer, a guiding slope is provided on the reverse side of the limiting teeth, the inclination direction of the guiding slope is opposite to the thread direction of the bolt column, and a limiting surface is provided on the positive side of the limiting teeth.

[0009] The beneficial effect of this solution is as follows: by arranging a guiding bevel and a limiting surface on the limiting teeth, after the one-way limiting pin falls between two adjacent limiting teeth, when the nut is installed forwardly along the thread direction of the bolt column, the one-way limiting pin abuts against the guiding bevel, and the nut can be installed normally without being affected by the limiting force of the limiting teeth; on the contrary, when the nut is hit or subjected to a force in the opposite direction to the thread direction of the bolt column, the one-way limiting pin abuts against the limiting surface, and the limiting teeth clamp the one-way limiting pin at the position of the current limiting teeth to prevent the nut from loosening.

[0010] In one of the schemes, the limiting tooth is arranged on the side of the washer facing the nut, and the side of the washer facing the nut is provided with a connecting surface for abutting against the nut, and the horizontal height of the limiting tooth is less than or equal to the horizontal height of the connecting surface.

[0011] The beneficial effects of this solution are: by setting a connecting surface on the upper surface of the washer, the abutment area between the washer and the nut is increased, and after tightening the nut, static friction is generated between the nut and the washer, further enhancing the anti-loosening effect; and, by making the horizontal height of the limiting tooth less than or equal to the horizontal height of the connecting surface, contact between the limiting tooth and the nut is avoided, the wear of the limiting tooth is reduced, and the anti-loosening screw has a longer service life.

[0012] In one of the solutions, a groove of a predetermined width is formed between the bottom of the guiding inclined surface of the limiting tooth and the bottom of the limiting surface of another adjacent limiting tooth;

[0013] And / or, the limiting teeth are flush with the side wall of the gasket along the radial outer side of the gasket.

[0014] The beneficial effect of this solution is: a groove of predetermined width is formed between two adjacent limit teeth to accommodate a one-way limit pin, so that the one-way limit pin can slide smoothly between two adjacent limit teeth when the nut is installed, avoiding the gap between the limit teeth being too small to affect the positive movement of the one-way limit pin along the thread direction.

[0015] In one of the schemes, the one-way limit pin includes a forward section, a reverse section and a swing shaft, the swing shaft is arranged between the forward section and the reverse section of the one-way limit pin, the swing shaft is connected to the side of the nut, and the one-way limit pin rotates around the swing shaft.

[0016] The beneficial effects of the present scheme are as follows: by providing a one-way limit pin that can rotate around a swing axis, the anti-loosening screw has the characteristic of being detachable. During installation, the reverse section of the one-way limit pin abuts against the guiding inclined surface of the limit tooth, which does not affect the normal installation of the nut; during the anti-loosening process, the reverse section of the one-way limit pin abuts against the limiting surface of the limit tooth, effectively preventing the nut from loosening; during disassembly, the forward section of the one-way limit pin is pressed against by a tool such as a wrench to cause the reverse section of the one-way limit pin to tilt upward, thereby releasing the lock on the nut and rotating the nut in the reverse direction, thereby realizing the disassembly of the anti-loosening screw without affecting its reuse.

[0017] In one of the schemes, the reverse section of the one-way limit pin abuts between two adjacent limit teeth. When the nut rotates in the forward direction, the reverse section of the one-way limit pin slides along the guide inclined surface to make the one-way limit pin rotate around the swing axis, and the reverse section of the one-way limit pin slides from the current guide inclined surface to another adjacent limit tooth.

[0018] The beneficial effect of this solution is that through the sliding abutment between the reverse section of the one-way limit pin and the guide inclined surface, the one-way limit pin will not be limited by the limit teeth during the installation of the nut, thereby ensuring the normal installation of the nut.

[0019] In one of the schemes, the reverse section of the one-way limit pin abuts between two adjacent limit teeth, and the end of the reverse section of the one-way limit pin is provided with an abutment slope. When the nut rotates in the reverse direction, the reverse section of the one-way limit pin abuts against the limit surface, and the nut interrupts the reverse rotation under the action of the one-way limit pin and the limit surface.

[0020] The beneficial effect of this solution is: by providing an abutment slope at the end of the reverse section of the one-way limit pin, the abutment slope is in contact with the limit surface, thereby increasing the contact area, achieving a better limit effect, and avoiding the wear of the one-way limit pin or the limit tooth caused by too small a contact area.

[0021] In one of the solutions, the swing shaft is connected to a torsion spring, and the torsion spring is in a compressed state. The torsion spring drives the reverse section of the one-way limit pin to swing toward the direction of the washer through resetting.

[0022] The beneficial effect of this solution is that the torsion spring in a compressed state provides an elastic force so that the reverse section of the one-way limit pin remains in a state of swinging toward the washer, thereby achieving locking of the nut by the one-way limit pin.

[0023] In one of the schemes, the first limiting mechanism includes a limiting groove arranged on the bolt column and a limiting protrusion arranged on the washer, the limiting groove is arranged on the side wall position of the bolt column, and the limiting protrusion and the limiting groove have a vertical projection shape corresponding to each other.

[0024] The beneficial effect of this solution is that the washer is prevented from rotating along the bolt column through the cooperation between the limiting groove and the limiting protrusion, and the washer is restricted to move only along the extension direction of the limiting groove.

[0025] In one of the schemes, the limiting groove is provided with an opening at the end of the bolt column facing away from the bolt cap, and the washer is inserted into the bolt column from the end of the bolt column facing away from the bolt cap, so that the limiting protrusion enters the limiting groove from the opening and moves along the direction of the limiting groove.

[0026] The beneficial effect of this solution is that an opening is provided at the end of the bolt column facing away from the bolt cap, and the limiting protrusion enters from the opening and moves along the extending direction of the limiting groove, so that the installation of the gasket is facilitated.

[0027] In one of the solutions, two limiting grooves are provided, and the two limiting grooves are axially symmetrically arranged on the bolt column.

[0028] The beneficial effect of this solution is that the stability of the gasket is further enhanced by the two symmetrically arranged limiting grooves, thereby avoiding affecting the installation stability of the gasket when subjected to side impact force.

[0029] In one of the solutions, there are more than two limiting grooves, and the two or more limiting grooves are arranged on the bolt column at equal intervals along the circumferential direction.

[0030] The beneficial effect of this solution is that by arranging at least two limiting grooves on the bolt column at equal intervals along the circumferential direction, the installation stability of the gasket is prevented from being affected when subjected to side impact force.

[0031] In one of the solutions, the first limiting mechanism includes the bolt column having a cross-section in a preset limiting shape, and the washer is provided with a through hole corresponding to the vertical projection shape of the bolt column.

[0032] The beneficial effect of this solution is that by providing a bolt column with a preset limit shape in cross section and a through hole corresponding to the vertical projection shape of the bolt column, after the washer with the through hole is installed on the bolt column, the washer can only move along the vertical installation direction, thereby avoiding the failure of the anti-loosening effect caused by the rotation of the washer.

[0033] In one of the solutions, the preset limiting shape is a D-shape, and the bolt column with a D-shaped cross section has a vertical limiting surface.

[0034] The beneficial effect of this solution is that a vertical limit surface is formed by the bolt column with a D-shaped cross-section. After the washer is installed, the vertical limit surface abuts against the inner wall of the through hole, so that the washer can only move along the vertical installation direction, avoiding the failure of the anti-loosening effect caused by the rotation of the washer.

[0035] In one of the solutions, the preset limiting shape is a waist-round shape, and the bolt column with a waist-round cross-section has two vertical limiting surfaces parallel to each other.

[0036] The beneficial effect of this solution is that two parallel vertical limit surfaces are formed by the bolt column with a waist-shaped cross-section, and the two vertical limit surfaces abut against the inner wall of the through hole, so that the gasket can only move along the vertical installation direction, avoiding the failure of the anti-loosening effect caused by the rotation of the gasket.

[0037] In one of the schemes, the preset limit shape is a cross or a star, the ends of the cross or the star are arcs with the same radius, and the bolt column with a cross or star-shaped cross section has a plurality of vertical cut grooves toward the center of the bolt column.

[0038] The beneficial effect of this solution is that the plurality of vertical cutout grooves abut against the inner wall of the through hole, so that the gasket can only move along the vertical installation direction, thereby avoiding the failure of the anti-loosening effect caused by the rotation of the gasket.

[0039] In one of the solutions, a ring is sleeved on the outer side of the nut, the inner side of the ring and the outer side of the nut correspond to each other, and the one-way limit pin is installed on the outer side wall of the ring.

[0040] The beneficial effect of this solution is that the one-way limit pin does not need to be installed on the nut, and the nut can be a common nut, thereby improving the versatility of the anti-loosening screw.

[0041] In one of the schemes, a receiving groove is formed on the upper end surface of the ring, and the ring is sleeved with the nut through the receiving groove; an opening is formed in the center of the ring, and the diameter of the opening is greater than or equal to the diameter of the bolt column.

[0042] The beneficial effects of this solution are: the ring is provided with a receiving groove for sleeve-fitting the nut, so that the connection between the nut and the ring is more fitted; at the same time, an opening is provided at the center of the ring for avoiding the bolt column.

[0043] In one of the solutions, the ferrule and the nut are integrally formed, and the ferrule is fixedly connected to the nut.

[0044] In one of the solutions, at least two one-way limit pins are provided;

[0045] When two one-way limit pins are provided, the two one-way limit pins are symmetrically arranged on the ferrule;

[0046] Alternatively, when there are more than two one-way limit pins, several of the one-way limit pins are arranged on the ring at equal intervals along the circumferential direction.

[0047] The beneficial effect of this solution is that: by using at least two one-way limit pins, the tightening effect of the nut is further enhanced, and the anti-loosening screw is prevented from loosening after being impacted.

[0048] In one of the schemes, a device connection assembly is also pointed out, including an anti-loosening screw as described in any one of the above-mentioned schemes, and at least two anti-loosening screws are provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0050] Figure 1 The structure of the first embodiment of the utility model is shown in FIG. Figure 1 .

[0051] Figure 2 The structure of the first embodiment of the utility model is shown in FIG. Figure 2 .

[0052] Figure 3 It is an exploded schematic diagram of the first embodiment of the utility model.

[0053] Figure 4 It is an enlarged view of point A of the first embodiment of the utility model.

[0054] Figure 5 It is an enlarged view of point B of the first embodiment of the utility model.

[0055] Figure 6 It is an exploded schematic diagram of the second embodiment of the utility model.

[0056] Figure 7 The third embodiment of the utility model is shown in FIG. Figure 1 .

[0057] Figure 8 The third embodiment of the utility model is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0060] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0061] First embodiment

[0062] Please refer to Figure 1-Figure 5 The present embodiment provides an anti-loosening screw, comprising a bolt column 1, a bolt cap 2, a nut 3 and a washer 4, wherein the washer 4 is arranged between the bolt cap 2 and the nut 3, and the washer 4 is sleeved on the outside of the bolt column 1, and a first limiting mechanism for preventing the washer 4 from rotating relative to the bolt column 1 in the circumferential direction is provided between the washer 4 and the bolt column 1, and a second limiting mechanism for preventing the nut 3 from rotating in the reverse direction is provided between the nut 3 and the washer 4; the second limiting mechanism comprises a one-way limiting pin 5 connected and matched with the nut 3 and a plurality of limiting teeth 42 arranged on the washer 4.

[0063] The beneficial effect of this embodiment is that by providing the washer 4, accidental reverse rotation of the nut 3 after being connected to the bolt column 1 can be avoided, loosening between the nut 3 and the bolt column 1 due to shaking or the like can be prevented, and the stability of the anti-loosening screw connection can be improved.

[0064] In one of the application scenarios of this embodiment, the limiting teeth 42 are distributed along the circumference of the washer 4, and a guide slope 421 is provided on the reverse side of the limiting teeth 42. The inclination direction of the guide slope 421 is opposite to the thread direction of the bolt column 1, and a limiting surface 422 is provided on the positive side of the limiting teeth 42.

[0065] The beneficial effect of this embodiment is as follows: by arranging the guiding bevel 421 and the limiting surface 422 on the limiting tooth 42, after the one-way limiting pin 5 falls between two adjacent limiting teeth, when the nut 3 is installed forwardly along the thread direction of the bolt column 1, the one-way limiting pin 5 abuts against the guiding bevel 421, and is not affected by the limiting tooth, and the nut 3 can be installed normally; on the contrary, when the nut 3 is hit or subjected to a force in the opposite direction to the thread direction of the bolt column 1, the one-way limiting pin 5 abuts against the limiting surface 422, and the limiting tooth clamps the one-way limiting pin 5 at the position of the current limiting tooth to prevent the nut 3 from loosening.

[0066] In one of the application scenarios of this embodiment, the limiting tooth 42 is arranged on the side of the washer 4 facing the nut 3, and the side of the washer 4 facing the nut 3 is provided with a connecting surface 43 for abutting against the nut 3, and the horizontal height of the limiting tooth 42 is less than or equal to the horizontal height of the connecting surface 43.

[0067] The beneficial effects of this embodiment are: by setting a connecting surface 43 on the upper surface of the washer 4, the abutment area between the washer 4 and the nut 3 is increased, and after tightening the nut 3, static friction is generated between the nut and the washer, further enhancing the anti-loosening effect; and, by making the horizontal height of the limiting tooth 42 less than or equal to the horizontal height of the connecting surface 43, contact between the limiting tooth 42 and the nut 3 is avoided, the wear of the limiting tooth is reduced, and the anti-loosening screw has a longer service life.

[0068] In one application scenario of this embodiment, a groove of a predetermined width is formed between the bottom of the guiding inclined surface 421 of the limiting tooth 42 and the bottom of the limiting surface 422 of another adjacent limiting tooth 42;

[0069] And / or, the limiting teeth 42 are flush with the side wall of the washer 4 along the radial outer side of the washer 4 .

[0070] The beneficial effect of this embodiment is that a groove of a predetermined width is formed between two adjacent limit teeth 42 to accommodate the one-way limit pin 5, so that the one-way limit pin 5 can slide smoothly between two adjacent limit teeth 42 when the nut is installed, thereby avoiding the gap between the limit teeth 42 being too small to affect the positive movement of the one-way limit pin 5 along the thread direction.

[0071] In one of the application scenarios of this embodiment, the one-way limit pin 5 includes a forward section, a reverse section and a swing shaft 51. The swing shaft 51 is arranged between the forward section and the reverse section of the one-way limit pin 5. The swing shaft 51 is connected to the side of the nut 3, and the one-way limit pin 5 rotates around the swing shaft 51.

[0072] The beneficial effects of this embodiment are as follows: by providing a one-way limit pin 5 that can rotate around the swing axis 51, the anti-loosening screw has the characteristic of being detachable. During installation, the reverse section of the one-way limit pin 5 abuts against the guiding inclined surface 421 of the limit tooth 42, which does not affect the normal installation of the nut; during the anti-loosening process, the reverse section of the one-way limit pin 5 abuts against the limiting surface 422 of the limit tooth 42, effectively preventing the nut from loosening; during disassembly, the forward section of the one-way limit pin 5 is pressed against by a tool such as a wrench to make the reverse section of the one-way limit pin 5 tilt upward, thereby releasing the lock on the nut, and the nut can be rotated in the reverse direction, thereby realizing the disassembly of the anti-loosening screw without affecting the reuse.

[0073] In one of the application scenarios of this embodiment, the reverse section of the one-way limit pin 5 abuts between two adjacent limit teeth 42. When the nut 3 rotates forward, the reverse section of the one-way limit pin 5 slides along the guide slope 421 to make the one-way limit pin 5 rotate around the swing axis 51. The reverse section of the one-way limit pin 5 slides from the current guide slope 421 to another adjacent limit tooth 42.

[0074] The beneficial effect of this embodiment is: through the sliding abutment between the reverse section of the one-way limit pin 5 and the guiding inclined surface 421, the one-way limit pin 5 will not be limited by the limiting tooth 42 during the installation process of the nut 3, and under the action of the guiding inclined surface 421, the washer 4 will not hinder the positive rotation of the nut 3, that is, the nut 3 can move normally in the direction close to the bolt cap 2 to form a locked state.

[0075] In one of the application scenarios of this embodiment, the reverse section of the one-way limit pin 5 abuts between two adjacent limit teeth 42, and the end of the reverse section of the one-way limit pin 5 is provided with an abutment slope. When the nut 3 rotates in the reverse direction, the reverse section of the one-way limit pin 5 abuts on the limit surface 422, and the nut 3 interrupts the reverse rotation under the action of the one-way limit pin 5 and the limit surface 422.

[0076] The beneficial effects of this embodiment are: by providing an abutting inclined surface at the end of the reverse section of the one-way stop pin 5, the abutting inclined surface contacts the stop surface 422, thereby increasing the contact area, achieving a better stop effect, and avoiding the wear of the one-way stop pin 5 or the stop tooth 42 due to too small a contact area. Even if there is shaking or other reasons, there will be no reverse rotation, and thus it will not move in the direction away from the bolt cap 2, avoiding accidental loosening.

[0077] When the nut 3 needs to be loosened, it is only necessary to press the positive section of the one-way limit pin 5 with a tool such as a wrench to make the reverse section of the one-way limit pin 5 tilt upward, and then twist the nut 3 in the reverse direction with a tool such as a wrench.

[0078] In one application scenario of this embodiment, the swing shaft 51 is connected to a torsion spring, and the torsion spring is in a compressed state. The torsion spring drives the reverse section of the one-way limit pin 5 to swing toward the direction of the washer 4 by resetting.

[0079] The beneficial effect of this embodiment is that the torsion spring in a compressed state provides an elastic force, so that the reverse section of the one-way stop pin 5 is kept in a state of swinging toward the washer 4, so that the one-way stop pin 5 can lock the nut. That is, the torsion spring drives the reverse section of the one-way stop pin 5 to swing toward the washer 4 through resetting, so that the one-way stop pin 5 has a rebound effect, and the reverse section of the one-way stop pin 5 can automatically lock with the washer 4 under the action of the torsion spring. The one-way stop pin 5 can be separated from the limit tooth 42 by pressing the forward section of the one-way stop pin 5 with a tool, so as to release the locking function, so that the nut can be loosened, and the effect of the one-way stop pin 5 locking the relative position between the nut 3 and the washer 4 is further improved.

[0080] In one of the application scenarios of this embodiment, the first limiting mechanism includes a limiting groove 11 arranged on the bolt column 1 and a limiting protrusion 41 arranged on the washer 4, the limiting groove 11 is arranged at the side wall position of the bolt column 1, and the limiting protrusion 41 corresponds to the vertical projection shape of the limiting groove 11.

[0081] The beneficial effect of this embodiment is that the washer 4 is prevented from rotating along the bolt column 1 through the cooperation between the limiting groove 11 and the limiting protrusion 41 , and the washer 4 is restricted to move only along the extending direction of the limiting groove 11 .

[0082] In one of the application scenarios of this embodiment, the limiting groove 11 is provided with an opening at the end of the bolt column 1 facing away from the bolt cap 2, and the washer 4 is inserted into the bolt column 1 from the end of the bolt column 1 facing away from the bolt cap 2, so that the limiting protrusion 41 enters the limiting groove 11 from the opening and moves along the direction of the limiting groove 11.

[0083] The beneficial effect of this embodiment is that by providing an opening at the end of the bolt column 1 facing away from the bolt cap 2 , the limiting protrusion 41 enters from the opening and moves along the extending direction of the limiting groove 11 , which facilitates the installation of the washer 4 .

[0084] In one application scenario of this embodiment, two limiting grooves 11 are provided, and the two limiting grooves 11 are axially symmetrically arranged on the bolt column 1 .

[0085] The beneficial effect of this embodiment is that the stability of the gasket 4 is further enhanced by the two symmetrically arranged limiting grooves 11, thereby avoiding affecting the installation stability of the gasket when subjected to side impact force.

[0086] In one application scenario of the present embodiment, more than two limiting grooves 11 are provided, and the more than two limiting grooves 11 are provided on the bolt column 1 at equal intervals along the circumferential direction.

[0087] The beneficial effect of this embodiment is that by arranging at least two limiting grooves 11 at equal intervals along the circumferential direction on the bolt column 1, the installation stability of the gasket is prevented from being affected when subjected to side impact force.

[0088] Second embodiment

[0089] See also Figure 6 In one embodiment of the utility model, the first limiting mechanism includes the bolt column 1 whose cross section is in a preset limiting shape, and the washer 4 is provided with a through hole 44 corresponding to the vertical projection shape of the bolt column 1.

[0090] The beneficial effect of this embodiment is: by providing a bolt column 1 with a preset limiting shape in cross section and a through hole 44 corresponding to the vertical projection shape of the bolt column 1, after the washer 4 with the through hole 44 is installed on the bolt column 1, the washer 4 can only move along the vertical installation direction, thereby avoiding the failure of the anti-loosening effect caused by the rotation of the washer 4.

[0091] In one application scenario of the present embodiment, the preset limiting shape is a D-shape, and the bolt column 1 with a D-shaped cross section has a vertical limiting surface.

[0092] The beneficial effect of this embodiment is that a vertical limiting surface is formed by the bolt column 1 with a D-shaped cross-section. After the washer 4 is installed, the vertical limiting surface abuts against the inner wall of the through hole 44, so that the washer 4 can only move along the vertical installation direction, avoiding the failure of the anti-loosening effect caused by the rotation of the washer 4.

[0093] In one application scenario of the present embodiment, the preset limiting shape is a waist-round shape, and the bolt column 1 with a waist-round cross-section has two vertical limiting surfaces parallel to each other.

[0094] The beneficial effect of this embodiment is that two parallel vertical limiting surfaces are formed by the bolt column 1 with a waist-shaped cross-section, and the two vertical limiting surfaces abut against the inner wall of the through hole 44, so that the washer 4 can only move along the vertical installation direction, avoiding the failure of the anti-loosening effect caused by the rotation of the washer 4.

[0095] In one of the application scenarios of this embodiment, the preset limit shape is a cross or a star, the ends of the cross or the star are arcs with the same radius, and the bolt column 1 with a cross or star-shaped cross section has a plurality of vertical cut grooves toward the center of the bolt column 1.

[0096] The beneficial effect of this embodiment is that the plurality of vertical cutout grooves abut against the inner wall of the through hole 44 so that the gasket 4 can only move along the vertical installation direction, thereby avoiding the failure of the anti-loosening effect caused by the rotation of the gasket 4.

[0097] Third embodiment

[0098] See also Figure 7 , Figure 8 In one embodiment of the utility model, a ferrule 6 is sleeved on the outer side of the nut 3, the inner side of the ferrule 6 corresponds to the outer side of the nut 3, and the one-way limit pin 5 is installed on the outer side wall of the ferrule 6.

[0099] The beneficial effect of this embodiment is that the one-way limiting pin 5 does not need to be installed on the nut 3, and the nut 3 can be a common nut, thereby improving the versatility of the anti-loosening screw.

[0100] In one of the application scenarios of this embodiment, a receiving groove is formed on the upper end surface of the ring 6, and the ring 6 is sleeved with the nut 3 through the receiving groove; an opening is formed at the center of the ring 6, and the diameter of the opening is greater than or equal to the diameter of the bolt column 1.

[0101] The beneficial effects of this embodiment are as follows: the ferrule 6 is provided with a receiving groove for receiving the nut 3 , so that the connection between the nut 3 and the ferrule 6 is more fitted; at the same time, an opening is provided at the center of the ferrule 6 for avoiding the bolt column 1 .

[0102] In one application scenario of the present embodiment, the ferrule 6 and the nut 3 are integrally formed, and the ferrule 6 and the nut 3 are fixedly connected.

[0103] In one application scenario of this embodiment, at least two one-way limiting pins 5 are provided;

[0104] When two one-way limiting pins 5 are provided, the two one-way limiting pins 5 are symmetrically arranged on the ferrule 6;

[0105] Alternatively, when there are more than two one-way limiting pins 5 , a plurality of the one-way limiting pins 5 are arranged on the ring 6 at equal intervals along the circumferential direction.

[0106] The beneficial effect of this embodiment is that the tightening effect of the nut is further enhanced by at least two one-way limiting pins 5, thereby preventing the anti-loosening screw from loosening after being impacted.

[0107] In one of the embodiments of the present invention, a device connection assembly is provided, comprising an anti-loosening screw as described in any one of the above-mentioned embodiments, wherein at least two anti-loosening screws are provided.

[0108] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An anti-loosening screw, characterized in that: The invention comprises a bolt column (1), a bolt cap (2), a nut (3) and a washer (4); the washer (4) is arranged between the bolt cap (2) and the nut (3); the washer (4) is sleeved on the outside of the bolt column (1); a first limiting mechanism for preventing the washer (4) from rotating relative to the bolt column (1) in the circumferential direction is arranged between the washer (4) and the bolt column (1); a second limiting mechanism for preventing the nut (3) from rotating in the reverse direction is arranged between the nut (3) and the washer (4); the second limiting mechanism comprises a one-way limiting pin (5) connected and matched with the nut (3) and a plurality of limiting teeth (42) arranged on the washer (4).

2. The anti-loosening screw according to claim 1, characterized in that: The limiting teeth (42) are distributed along the circumference of the washer (4); a guiding inclined surface (421) is provided on the reverse side of the limiting teeth (42); the inclination direction of the guiding inclined surface (421) is opposite to the thread direction of the bolt column (1); and a limiting surface (422) is provided on the positive side of the limiting teeth (42).

3. The anti-loosening screw according to claim 2, characterized in that: The limiting tooth (42) is arranged on the side of the washer (4) facing the nut (3), and the side of the washer (4) facing the nut (3) is provided with a connecting surface (43) for abutting against the nut (3), and the horizontal height of the limiting tooth (42) is less than or equal to the horizontal height of the connecting surface (43).

4. The anti-loosening screw according to any one of claims 2 to 3, characterized in that: The one-way limit pin (5) comprises a forward section, a reverse section and a swing shaft (51); the swing shaft (51) is arranged between the forward section and the reverse section of the one-way limit pin (5); the swing shaft (51) is connected to the side of the nut (3); the one-way limit pin (5) rotates around the swing shaft (51); the reverse section of the one-way limit pin (5) abuts between two adjacent limit teeth (42); When the nut (3) rotates in the forward direction, the reverse section of the one-way limit pin (5) slides along the guide inclined surface (421), so that the one-way limit pin (5) rotates around the swing axis (51), and the reverse section of the one-way limit pin (5) slides from the current guide inclined surface (421) to another adjacent limit tooth (42); Alternatively, an abutment inclined surface is provided at the end of the reverse section of the one-way limit pin (5), and when the nut (3) rotates in the reverse direction, the reverse section of the one-way limit pin (5) abuts against the limit surface (422), and the nut (3) interrupts the reverse rotation under the action of the one-way limit pin (5) and the limit surface (422).

5. The anti-loosening screw according to claim 4, characterized in that: The swing shaft (51) is connected to a torsion spring, which is in a compressed state. The torsion spring drives the reverse section of the one-way limit pin (5) to swing in the direction of the washer (4) by resetting.

6. The anti-loosening screw according to claim 1, characterized in that: The first limiting mechanism comprises a limiting groove (11) provided on the bolt column (1) and a limiting protrusion (41) provided on the washer (4); the limiting groove (11) is provided at a side wall position of the bolt column (1); and the limiting protrusion (41) and the limiting groove (11) correspond to each other in vertical projection shape; The limiting groove (11) is provided with an opening at the end of the bolt column (1) facing away from the bolt cap (2); the washer (4) is sleeved into the bolt column (1) from the end of the bolt column (1) facing away from the bolt cap (2), so that the limiting protrusion (41) enters the limiting groove (11) from the opening and moves along the direction of the limiting groove (11).

7. The anti-loosening screw according to claim 1, characterized in that: The first limiting mechanism comprises the bolt column (1) whose cross section is in a preset limiting shape, and the washer (4) is provided with a through hole (44) corresponding to the vertical projection shape of the bolt column (1).

8. The anti-loosening screw according to claim 7, characterized in that: The preset limiting shape is a D-shape, a waist-round shape, a cross shape or a star shape.

9. The anti-loosening screw according to claim 8, characterized in that: The outer side of the nut (3) is sleeved with a ferrule (6), the inner side of the ferrule (6) and the outer side of the nut (3) are matched with each other, and the one-way limit pin (5) is installed on the outer side wall of the ferrule (6); And / or, at least two one-way limiting pins (5) are provided.

10. A device connection assembly, characterized in that: It comprises the anti-loosening screw according to any one of claims 1 to 9, wherein at least two anti-loosening screws are provided.

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