CN221857271U - A kind of anti-loosening tool for bolts - Google Patents

Abstract

The utility model discloses an anti-loosening tool for bolts, comprising a constraint member for simultaneously limiting at least two bolts, wherein at least two constraint rings are provided on the constraint member, the constraint member is buckled on a plurality of bolts, and the constraint rings on the constraint member are operated to correspond to the positions of the bolts, and the buckling is continued, and the internal shape of each constraint ring after deformation matches the bolt head. Since a plurality of constraint rings are arranged on one constraint member, that is, a plurality of bolts are constrained simultaneously by the constraint member and the constraint ring as a whole, the bolts cannot rotate as a whole compared with other bolts. Under complex working conditions, the anti-loosening tool does not need to be arranged between the bolt and the fixing member, and does not need to be pressed by the bolt head. After the constraint member is removed, the bolt can be quickly and conveniently disassembled, and a plurality of bolts are mutually locked, thereby improving reliability, facilitating overall disassembly and assembly, and achieving a stable anti-loosening effect.

Description

A kind of anti-loosening tool for bolts

Technical Field

The present application relates to the technical field of automobile structure fixing, and in particular to a tool for preventing bolts from loosening.

Background Art

High-strength hexagonal head bolts are widely used in various connection structures, especially in rotating shaft connections. Since the anti-loosening effect directly affects the fatigue life of the bolts and the safety of the connection structure, anti-loosening measures have always been the research focus of bolt application. At present, the commonly used anti-loosening methods for high-strength hexagonal head bolts include: using thread locking glue, using the locking glue to solidify to generate a rotational resistance torque to prevent loosening, which has good effects, but is difficult to disassemble, which is not conducive to daily inspection and maintenance. When the bolts are used again, it is difficult to clean the residual locking glue, which reduces the effect of the locking glue; using a gasket with a flanged stop structure, using the mechanical deformation generated by the local flange of the gasket to stop and prevent loosening. Due to the large preload force of the high-strength bolt, the gasket hardness is required to be higher, and the flanged structure needs to reduce the gasket hardness. The two are difficult to balance, and the gasket is often compressed. The anti-loosening effect is poor; a locking washer with serrations is used, and the serrations bite into the supporting surface to obtain rotational resistance to prevent loosening. The production cost of the washer is high, and the surface of the supporting surface is damaged. After disassembly, the supporting surface cannot be bolted again; a set of double-stacked self-locking washers with wedge-shaped teeth are used, and the wedge-shaped teeth are used to self-lock and prevent loosening without damaging the supporting surface. Under a large preload, plastic deformation is prone to occur, and the anti-loosening effect is unstable; a spring washer is used, and the elastic deformation of the washer is used to prevent loosening. Under a large preload, crushing and plastic deformation are prone to occur, which is not suitable for high-strength bolts.

Utility Model Content

In view of the defects existing in the prior art, the present application provides an anti-loosening tool for bolts to solve the problem of poor anti-loosening effect of bolts in the prior art.

The above-mentioned purpose of the present application is mainly achieved through the following technical solutions:

A tool for preventing bolts from loosening, the tool comprising a restraining member for simultaneously restraining at least two bolts;

The restraining member is provided with at least two through holes for accommodating bolt heads, and a restraining ring is provided on the same side of each through hole. The inner diameter of the restraining ring at one end away from the restraining member is smaller than the outer diameter of the bolt head, and when the bolt head passes through the through hole and extends into the restraining ring, the restraining ring is deformed and restricts the bolt head from rotating in the restraining ring.

In an optional embodiment, a plurality of guide grooves are provided at one end of the restraining ring away from the restraining member, and the guide grooves are arranged at intervals in the circumferential direction.

In an optional embodiment, the confinement ring is conical.

In an optional embodiment, a transition fillet is provided at the connection between the restraint ring and the restraint member.

In an optional embodiment, a positioning hole is further provided on the restraining member, and a fixing portion is passed through the positioning hole.

In an optional embodiment, the fixing portion adopts a positioning bolt, and an adhesive layer is provided on the fixing portion.

In an optional embodiment, a plurality of the positioning holes are provided and are arranged between the plurality of the through holes at intervals.

In an optional embodiment, the height of the restraint ring is not less than one third of the thickness of the bolt head.

In an optional embodiment, the anti-loosening tool further includes a mating piece, on which is provided a mounting hole that matches with the restraint ring, and when the restraint ring matches with the mounting hole, one side end surface of the mating piece fits with the restraint piece.

In an optional embodiment, an operating rod is provided on the matching piece.

Compared with the prior art, the advantages of this application are:

The anti-loosening tool of the present application includes a constraint member that simultaneously restricts at least two bolts, and the constraint member is provided with at least two through holes for accommodating bolt heads, and a constraint ring is provided on the same side of each through hole, and the inner diameter of the constraint ring away from the constraint member is smaller than the outer diameter of the bolt head, and when the bolt head passes through the through hole and extends into the constraint ring, the constraint ring is deformed and restricts the bolt head from rotating in the constraint ring. In actual operation, the constraint member is buckled on a plurality of bolts that have been connected and fixed, and the constraint ring on the constraint member is operated to the position of the bolt corresponding to the bolt, and the buckling is continued. After the bolt head passes through the through hole on the constraint member, the bolt head hits the inner wall of the constraint member. The plurality of constraint rings are arranged on one constraint part, that is to say, a plurality of bolts are constrained at the same time by the constraint part and the constraint ring as a whole. The bolts cannot rotate as a whole compared with other bolts. Under complex working conditions, the anti-loosening tool does not need to be arranged between the bolt and the fixing part, and does not need to be pressed by the bolt head. After removing the constraint part, the bolt can be quickly and conveniently removed. Mutual locking is formed between the plurality of bolts, which improves reliability, facilitates overall disassembly and assembly, and has a stable anti-loosening effect.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic diagram of the structure of a restraining member provided in an embodiment of the present application;

FIG2 is a cross-sectional view of a restraining member provided in an embodiment of the present application;

FIG3 is a schematic structural diagram of a matching member provided in an embodiment of the present application;

FIG4 is a schematic diagram of the structure of the embodiment of the present application after the restraint member is installed;

FIG5 is a schematic diagram of the assembly of a restraining member according to an embodiment of the present application;

In the figure: 100, restraining member; 101, through hole; 102, restraining ring; 103, guide groove; 104, transition fillet; 105, positioning hole; 106, fixing part; 200, matching member; 201, mounting hole; 202, operating rod.

DETAILED DESCRIPTION

The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structural and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments described herein.

Figure 1 is a structural schematic diagram of a restraining member 100 provided in an embodiment of the present application, Figure 2 is a cross-sectional view of a restraining member 100 provided in an embodiment of the present application, Figure 3 is a structural schematic diagram of a matching member 200 provided in an embodiment of the present application, Figure 4 is a structural schematic diagram of the restraining member 100 after installation provided in an embodiment of the present application, and Figure 5 is an assembly schematic diagram of the restraining member 100 provided in an embodiment of the present application. It should be noted that in Figures 1 to 5, the anti-loosening fixtures are respectively arranged corresponding to two bolts to be constrained, and the anti-loosening fixtures for other numbers of bolts are not specifically displayed.

As shown in Figures 1 and 2, an anti-loosening fixture for bolts includes a constraint 100 that simultaneously constrains at least two bolts. The anti-loosening fixture simultaneously constrains at least two bolts, and after the two bolts are tightened, multiple bolts are constrained from rotating relative to each other. Since the multiple bolts are spaced apart, under the premise that the multiple bolts cannot be rotated separately, after the multiple bolts are each threadedly connected stably, the multiple bolts cannot be reversely screwed out as a whole through the anti-loosening fixture, thereby maintaining the overall connection reliability.

As shown in Figures 1 and 2, the constraint member 100 is provided with at least two through holes 101 for accommodating bolt heads, the number of through holes 101 is the same as the number of bolts to be prevented from loosening, and maintains a one-to-one correspondence, and a constraint ring 102 is provided on the same side of each of the through holes 101, that is, the number of constraint rings 102 is the same as the number of bolts to be prevented from loosening, and maintains a one-to-one correspondence, the inner diameter of the constraint ring 102 away from the end of the constraint member 100 is smaller than the outer diameter of the bolt head, and when the bolt head passes through the through hole 101 and extends into the constraint ring 102, the constraint ring 102 is deformed and restricts the bolt head from rotating in the constraint ring 102.

As shown in Figures 1, 2 and 4, during the assembly of the constraint ring 102 with the bolt head, due to the smaller inner diameter of one end of the constraint ring 102, along with the assembly process of the constraint member 100 and the constraint ring 102, the constraint ring 102 undergoes corresponding deformation under the abutment of the bolt head, and the outer angle of the bolt head will push out a corresponding inner angle in the constraint ring 102, thereby achieving a precise embracing relationship between the constraint ring 102 and the bolt head at this angle, and when multiple bolt heads respectively maintain a stable relative relationship with multiple constraint rings 102, the locking tightness of the bolt can be taken as the first consideration, and after the bolt is fully rotated to the target number of turns and position, the constraint ring 102 can be used for corresponding positioning to maximize the locking effect of the bolt and the relaxed state of the bolt after locking.

As shown in Figures 1, 2 and 4, in an optional embodiment, the working principle of the anti-loosening tool of the present application is: it includes a constraint 100 that simultaneously restricts at least two bolts, and the constraint 100 is provided with at least two through holes 101 for accommodating bolt heads, and a constraint ring 102 is provided on the same side of each through hole 101, and the inner diameter of the constraint ring 102 away from the constraint 100 is smaller than the outer diameter of the bolt head, and when the bolt head passes through the through hole 101 and extends into the constraint ring 102, the constraint ring 102 is deformed and restricts the bolt head from rotating in the constraint ring 102. In actual operation, on multiple bolts that have been connected and fixed, the constraint 100 is buckled, and the constraint ring 102 on the constraint 100 is operated to the position of the corresponding bolt, and the bolt head passes through the constraint ring 102 with continued buckling. After the through hole 101 on the constraint part 100 is inserted, the bolt head is pressed against the inner wall of the constraint part 100 until the constraint ring 102 is deformed. The constraint ring 102 covers the side wall of the bolt head. The internal shape of each constraint ring 102 after deformation matches the bolt head. Since multiple constraint rings 102 are arranged on one constraint part 100, that is to say, multiple bolts are constrained by the constraint part 100 and the constraint ring 102 as a whole at the same time, the bolts cannot rotate as a whole compared to other bolts. Under complex working conditions, the anti-loosening tooling does not need to be arranged between the bolt and the fixing part, and does not need to be pressed by the bolt head. After removing the constraint part 100, the bolts can be quickly and conveniently removed. Mutual locking is formed between the multiple bolts, which improves reliability, facilitates overall disassembly and assembly, and has a stable anti-loosening effect.

As shown in FIG. 1 and FIG. 2 , in an optional embodiment, a plurality of guide grooves 103 are provided at one end of the restraining ring 102 away from the restraining member 100 , and the guide grooves 103 are arranged at intervals in the circumferential direction.

During the assembly of the constraint ring 102 with the bolt head, due to the smaller inner diameter of one end of the constraint ring 102, along with the assembly process of the constraint member 100 and the constraint ring 102, the constraint ring 102 undergoes corresponding deformation under the abutment of the bolt head, and the outer angle of the bolt head will push out the corresponding inner angle in the constraint ring 102. Since the constraint ring 102 needs to adapt to the deformation of the bolt head, the guide groove 103 arranged around one side of the constraint ring 102 can make the constraint ring 102 maintain its original depth while being more stable when deformed, avoiding unpredictable tearing at the deformation site. The constraint ring 102 is deformed at the guide groove 103, or the guide groove 103 provides a deformation margin at the deformation site of the constraint ring 102, so that one side of the constraint ring 102 can be deformed quickly, and the constraint ring 102 also has a portion that can completely wrap around the bolt head to maintain the effectiveness of the constraint.

As shown in FIG. 1 and FIG. 2 , in an optional embodiment, the restraint ring 102 is conical, and the inner diameter of the conical restraint ring 102 gradually decreases in the direction away from the restraint member 100 , which is more suitable for bolts of different specifications within a range and improves applicability.

As shown in Figures 1 and 2, in an optional embodiment, a transition fillet 104 is provided at the connection between the restraint ring 102 and the restraint member 100 to maintain the reliability of the connection between the restraint ring 102 and the restraint member 100 and avoid breakage within a certain deformation range. In addition, the restraint ring 102 can be formed by stamping on the restraint member 100 once, thereby improving the overall forming efficiency and reliability.

As shown in Figures 1 and 2, in an optional embodiment, a positioning hole 105 is further provided on the restraining member 100, and a fixing portion 106 is passed through the positioning hole 105. After the restraining member 100 completes the restraint on the bolt head, the fixing portion 106 in the positioning hole 105 performs a secondary fixed connection on the restraining member 100 as a whole, so as to prevent the restraining member 100 from loosening along the axial direction of the bolt, avoid the restraining member 100 from falling off as a whole, and improve reliability.

As shown in Figures 1, 2 and 5, in an optional embodiment, the fixing part 106 adopts a positioning bolt, and an adhesive layer is provided on the fixing part 106. The positioning bolt is threadedly connected to the associated fixing position as the fixing part 106, and the adhesive layer prevents the fixing part 106 from falling off, thereby improving reliability.

As shown in FIG. 1 , FIG. 2 and FIG. 5 , in an optional embodiment, a plurality of positioning holes 105 are provided and are arranged at intervals between the plurality of through holes 101 to further prevent falling off.

As shown in FIG. 1 and FIG. 2 , in an optional embodiment, the height of the restraint ring 102 is not less than one third of the thickness of the bolt head, so as to maintain a reliable restraint depth and improve reliability.

As shown in Figures 1, 3 and 5, in an optional embodiment, the anti-loosening tooling also includes a mating piece 200, and the mating piece 200 is provided with a mounting hole 201 that cooperates with the restraint ring 102, and when the restraint ring 102 cooperates with the mounting hole 201, one side end face of the mating piece 200 fits with the restraint member 100, and the mating piece 200 facilitates the assembly of the restraint member 100. During specific operation, the restraint ring 102 on the restraint member 100 is matched with the mounting hole 201 on the mating piece 200 to form a temporary connection with the restraint member 100, and the through hole 101 on the restraint member 100 is installed corresponding to the bolt head, and the end face on one side of the mating piece 200 can stably and evenly press the restraint member 100 close to the bolt head.

As shown in FIG. 1 , FIG. 3 and FIG. 5 , in an optional embodiment, an operating rod 202 is provided on the mating member 200 to facilitate holding and striking, thereby improving the convenience of operation.

It should be understood that the terms first, second, etc. are only used to distinguish descriptions and should not be understood as indicating or implying relative importance. Although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit without departing from the scope of the exemplary embodiments of the present utility model.

It should be understood that the term "and/or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term "/and" in this article describes another relationship between associated objects, indicating that two relationships may exist. For example, A/and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character "/" in this article generally indicates that the previous and next associated objects are in an "or" relationship.

It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside", etc. indicate orientations or positional relationships that are customarily placed when the disclosed product is used, or are orientations or positional relationships that are customarily understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The terms used herein are only used to describe specific embodiments and are not intended to limit the exemplary embodiments of the utility model. As used herein, the singular forms "one", "an", and "the" are intended to include plural forms unless the context clearly indicates the opposite meaning. It should also be understood that the terms "include", "comprise", "include", and/or "comprising" when used herein specify the existence of the claimed features, integers, steps, operations, units, and/or components, and do not exclude the existence or increase of one or more other features, quantities, steps, operations, units, components, and/or their combinations.

Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, it should be understood by those of ordinary skill in the art that the exemplary embodiments may be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid making the exemplary embodiments unclear.

The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field.

Claims (10)

1. A bolt anti-loosening tool, characterized in that the anti-loosening tool comprises a restraining member that simultaneously restrains at least two bolts; The restraining member is provided with at least two through holes for accommodating bolt heads, and a restraining ring is provided on the same side of each through hole. The inner diameter of the restraining ring at one end away from the restraining member is smaller than the outer diameter of the bolt head, and when the bolt head passes through the through hole and extends into the restraining ring, the restraining ring is deformed and restricts the bolt head from rotating in the restraining ring. 2. The anti-loosening tool for bolts as claimed in claim 1, characterized in that: a plurality of guide grooves are provided at one end of the restraining ring away from the restraining member, and the guide grooves are arranged at intervals in the circumferential direction. 3. The anti-loosening tool for bolts as claimed in claim 1, characterized in that the restraining ring is conical. 4. The anti-loosening tool for bolts as claimed in claim 1, characterized in that a transition fillet is provided at the connection between the restraining ring and the restraining member. 5. The anti-loosening tool for bolts as claimed in claim 1, characterized in that: a positioning hole is also provided on the restraining member, and a fixing part is penetrated in the positioning hole. 6. The anti-loosening tool for bolts as claimed in claim 5, characterized in that the fixing portion adopts a positioning bolt and an adhesive layer is provided on the fixing portion. 7. The anti-loosening tool for bolts according to claim 5, characterized in that: a plurality of the positioning holes are provided and are arranged between the plurality of the through holes at intervals. 8. The anti-loosening tool for bolts as claimed in claim 1, characterized in that the height of the restraint ring is not less than one third of the thickness of the bolt head. 9. The anti-loosening fixture for bolts as described in claim 1 is characterized in that: the anti-loosening fixture also includes a mating piece, the mating piece is provided with a mounting hole that matches with the restraining ring, and when the restraining ring matches with the mounting hole, one side end face of the mating piece fits with the restraining piece. 10. The anti-loosening tool for bolts as claimed in claim 9, characterized in that an operating rod is provided on the matching piece.