Anti-loose and non-detachable bolt

Abstract

The utility model discloses an anti-loose and non-detachable bolt. The anti-loose and non-detachable bolt comprises a slotted bolt, an anti-loose frame and a nut, the slotted bolt comprises a head part and a screw rod, threads are arranged at the end, away from the head part, of the screw rod, and a groove is formed in the end, away from the head part, of the screw rod. The anti-loosening frame comprises a base, a connecting rod and a plough rod. The base is annular, the inner diameter of the base is larger than the outer diameter of the screw rod, and the outer diameter of the base is larger than the outer diameter of the nut. The connecting rod is in a long strip shape, and the two ends of the connecting rod are connected with the base and the plough rod respectively. The height of the connecting rod is larger than that of the nut, and the connecting position of the connecting rod and the base is located on the outer circle of the base. The anti-loosening frame is used in cooperation with the slotted bolt and the nut, the nut is located between the plow rod of the anti-loosening frame and the base, the groove of the slotted bolt is expanded and expanded through the plow rod of the anti-loosening frame, the nut cannot rotate reversely, and the effect of preventing the nut from loosening and being undetachable is achieved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical bolt fastening, in particular to an anti-loosening and non-detachable bolt. Background Art

[0002] Bolt: A mechanical part, a cylindrical threaded fastener that is matched with a nut. A type of fastener consisting of a head and a screw (a cylinder with external threads), which must be matched with a nut to fasten two parts with through holes.

[0003] Bolts and nuts are often used for installation and fastening in mechanical structures. In conventional fastening methods, when the workpiece is vibrating, the nuts are very easy to loosen, causing the bolts to fall off and the fastening to fail, resulting in safety accidents and economic losses. At the same time, some bolt-fastened workpieces are not considered to be disassembled later, and some are also required not to be disassembled, with anti-disassembly and anti-theft functions.

[0004] In response to the above usage requirements, the industry uses the following solutions:

[0005] 1. After the bolts are tightened, the threads are manually damaged with hard objects to prevent the nuts from loosening. However, this method is simple and crude, without unified operating instructions and effect evaluation. The actual effect varies from person to person, and it is difficult to ensure 100% reliability.

[0006] 2. After the bolts are tightened, the nuts and bolts are welded and fixed. However, welding requires welding tools and working environment, which is costly and not applicable to all working conditions.

[0007] 3. Use spring washers to compensate for the preload loss when the nut loosens, so that the nut remains tight. The disadvantage of this method is that the working principle of the spring washer can only slow down the loosening of the nut. As the running time increases, the nut will still loosen, and the loosening problem cannot be fundamentally solved.

[0008] In view of the above problems, the utility model provides a non-loosening and non-removable bolt, which can achieve the following functions:

[0009] 1. Solve the problem of loose bolts and nuts.

[0010] 2. Bolts and nuts cannot be disassembled, which can prevent disassembly and theft.

[0011] 3. The principle is simple and reliable. The functions of 1 and 2 above are realized simultaneously during the bolt tightening process without the need for additional tools or additional operations. Utility Model Content

[0012] To solve the above technical problems, the present utility model provides a bolt with anti-loosening and non-detachable features. It is used in combination with a grooved bolt and a nut through an anti-loosening frame. The nut is located between the plow rod and the base of the anti-loosening frame. The plow rod of the anti-loosening frame expands and widens the groove of the grooved bolt, making it impossible for the nut to rotate in reverse, achieving the effect of preventing the nut from loosening and being non-detachable.

[0013] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0014] The present utility model provides a bolt with anti-loosening and non-detachable features, which is characterized by including:

[0015] A grooved bolt, an anti-loosening frame, and a nut;

[0016] The grooved bolt includes a head and a screw rod, and a groove is provided at one end of the screw rod away from the head;

[0017] The anti-loosening frame includes a base, a connecting rod, and a plow rod; the base is annular, the inner diameter of the base is larger than the outer diameter of the screw rod; the outer diameter of the base is larger than the outer diameter of the nut; the connecting rod is strip-shaped, and its two ends are respectively connected to the base and the plow rod; the height of the connecting rod is greater than the height of the nut; the connection part of the connecting rod and the base is located at the outer circle of the base.

[0018] As a preferred technical solution, the plow rod is strip-shaped, and the width of its cross-section gradually narrows in the direction towards the base. The shape of the cross-section can be wedge-shaped, triangular, or trapezoidal; the narrow end of the cross-section of the plow rod faces the base.

[0019] As a preferred technical solution, the width of the groove is equal; the width of the widest part of the cross-section of the plow rod is larger than the width of the groove, and the width of the narrowest part of the cross-section of the plow rod is smaller than the width of the groove.

[0020] As a preferred technical solution, the width of the groove gradually narrows in the direction towards the base; the width of the narrowest part of the cross-section of the plow rod is smaller than the width of the widest part of the groove; the width of the widest part of the cross-section of the plow rod is larger than the width of the narrowest part of the groove.

[0021] As a preferred technical solution, the groove is in a straight shape, the number of plow rods is one, and the number of connecting rods is two.

[0022] As a preferred technical solution, the groove is in a cross shape, the number of plow rods is two, and the number of connecting rods is four.

[0023] As a preferred technical solution, the number of plow rods is more than two, and the number of connecting rods is twice the number of plow rods.

[0024] As a preferred technical solution, the distance between the connecting rods connected to both ends of the same plow rod is greater than the outer diameter of the nut.

[0025] As a preferred technical solution, the screw rod is provided with threads at one end far from the head, and the height of the groove in the axial direction of the screw rod is greater than or equal to the height of the threaded part arranged on the screw rod.

[0026] As a preferred technical solution, the materials of the slotted bolt, the anti-loosening frame, and the nut are metal or non-metal; the connecting rods are respectively fixedly connected or integrally formed with the base and the plow rod.

[0027] The beneficial effects of the present utility model are as follows:

[0028] 1. The anti-loosening frame cooperates with the slotted bolt and the nut. The nut is located between the plow rod and the base of the anti-loosening frame. The plow rod expands and enlarges the groove, and the expanded screw rod cannot return to its original state, so that the screwed nut cannot reverse, solving the problem of nut loosening and achieving the effects of anti-loosening and non-detachability.

[0029] 2. The operation is simple and the requirements for operators are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present utility model, and are used together with the specification to explain the principles of the present utility model.

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic assembly diagram of the slotted bolt, the anti-loosening frame, and the nut of the present utility model;

[0033] Figure 2 It is a schematic diagram of the use effect of the present utility model;

[0034] Figure 3 It is a schematic diagram of the slotted bolt;

[0035] Figure 4 It is a schematic diagram of the anti-loosening frame;

[0036] Among them, 1 - slotted bolt, 2 - anti-loosening frame, 3 - nut, 4 - head, 5 - screw rod, 6 - groove, 7 - base, 8 - connecting rod, 9 - plow rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to more clearly understand the above-mentioned objects, features, and advantages of the present utility model, the solution of the present utility model will be further described below. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0038] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0039] Embodiment 1:

[0040] Please refer to Figures 1 - 3 , a bolt with anti-loosening and non-detachable functions provided by the present utility model, including a slotted bolt 1, an anti-loosening frame 2, and a nut 3. The materials of the slotted bolt 1, the anti-loosening frame 2, and the nut 3 are metal or non-metal, and the strength of the materials needs to meet the strength requirements when the bolt is tightened. The slotted bolt 1 includes a head 4 and a screw rod 5. The screw rod 5 is provided with a thread at one end away from the head 4, and a groove 6 is provided at one end of the screw rod 5 away from the head 4.

[0041] Please refer to Figure 1 , Figure 2 , Figure 4 , the anti-loosening frame 2 includes a base 7, a connecting rod 8, and a plow rod 9. The base 7 is annular, the inner diameter of the base 7 is larger than the outer diameter of the screw rod 5 to ensure that the screw rod 5 can pass through freely; the outer diameter of the base 7 is larger than the outer diameter of the nut 3. The connecting rod 8 is strip-shaped, and its two ends are respectively connected to the base 7 and the plow rod 9. The connecting rod 8 is preferably perpendicular to the base 7; the connection position of the connecting rod 8 and the base 7 is at the outer circle of the base 7. The plow rod 9 is strip-shaped, and the width of its cross-section gradually narrows in the direction towards the base 7. The cross-section can be wedge-shaped, triangular, trapezoidal, etc. The narrow end of the cross-section of the plow rod 9 faces the base 7; the width of the groove 6 is of equal width; the width of the widest part of the cross-section of the plow rod 7 is larger than the width of the groove 6, and the width of the narrowest part of the cross-section of the plow rod 9 is smaller than the width of the groove 6, which is convenient for the plow rod 9 to smoothly enter the groove 6 on the slotted bolt 1. After the plow rod 9 enters the groove 6, the screw rod 5 is expanded and enlarged, so that the diameter of the end of the screw rod 5 away from the head 4 is larger than the inner diameter of the nut 3, and the expanded screw rod 5 cannot return to its original state, so that the nut 3 cannot rotate away from the head 4, that is, the anti-loosening effect of the nut 3 is achieved. Even with the help of external force, the nut 3 cannot be screwed out of the screw rod 5, achieving the non-detachable effect. The connecting rod 8 is fixedly connected or integrally formed with the base 7 and the plow rod 9 respectively.

[0042] Furthermore, the groove 6 is in a straight line shape, the number of plow bars 9 is one, the number of connecting rods 8 is two, and the two connecting rods 8 are symmetrically distributed about the center of the base 7. The height of the groove 6 in the axial direction of the screw 5 may be related to the length of the slotted bolt 1. Preferably, the height of the groove 6 in the axial direction of the screw 5 is greater than or equal to the height of the threaded portion arranged on the screw 5. The height of the connecting rod 8 is greater than the height of the nut 3, and the distance between the two connecting rods 8 connected to both ends of the plow bar 9 is greater than the outer diameter of the nut 3, so that the nut 3 can rotate freely between the connecting rods 8.

[0043] The following is the specific implementation process:

[0044] When using the anti-loosening and non-detachable bolt provided by the present utility model, first put the nut 3 into the anti-loosening frame 2, pass the slotted bolt 1 through the workpiece to be connected, then put the anti-loosening frame 2 and the nut 3 on one end of the screw 5 away from the head 4 and rotate them towards the head 4 direction. At the same time, adjust the anti-loosening frame 2 to align its plow bar 9 with the groove 6 of the slotted bolt 1. Use an open-ended wrench to tighten the slotted bolt 1 and the nut 3. As the nut 3 is screwed in, the anti-loosening frame 2 moves towards the head 4 direction under the pressure of the nut 3. As the plow bar 9 penetrates into the groove 6 of the slotted bolt 1, the groove 6 is expanded and enlarged, and the head 4 of the slotted bolt 1 is separated to both sides. At the same time, since the plow bar 9 is stuck in the groove 6, the expanded screw 5 cannot return to its original state. At this time, even if a wrench is used to disassemble the nut 3, it cannot rotate back, that is, the nut 3 can only be screwed in and cannot be reversed, achieving the effects of anti-loosening and non-detachability.

[0045] Embodiment 2:

[0046] In Embodiment 1, the width of the groove is of equal width. In this embodiment, the width of the groove 6 gradually becomes narrower in the direction towards the base 7; the width of the narrowest part of the cross-section of the plow bar 9 is less than the width of the widest part of the groove 6, and the width of the widest part of the cross-section of the plow bar 9 is greater than the width of the narrowest part of the groove 6. As the plow bar 9 enters the groove 6, the gradually widening plow bar 9 will expand and enlarge the gradually narrowing groove 6. Others are the same as in Embodiment 1 and will not be elaborated here.

[0047] Embodiment 3:

[0048] In Embodiment 1, both the groove 6 and the plow bar 9 are in a straight line shape. In this embodiment, the number of plow bars 9 is two, the number of connecting rods 8 is four, the groove 6 is in a cross shape, and the two sides of the groove 6 are perpendicular to each other. Correspondingly, the two plow bars 9 are also perpendicular to each other. Of course, in other embodiments, they may not be in a perpendicular relationship, and the two sides of the groove 6 and the plow bar 9 can form a non-90° angle respectively.

[0049] Embodiment 4:

[0050] Inspired by the third embodiment, there can be more than two plough rods 9, and correspondingly, the groove 6 includes multiple sides, and the number of connecting rods 8 is also multiple. Specifically, the number of connecting rods 8 is twice the number of plough rods 9. For example, the plough rod 9 and the groove 6 form a shape similar to a cross.

[0051] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lock - preventing and non - detachable bolt, characterized in that, Comprising: A slotted bolt, a lock washer, and a nut; The slotted bolt includes a head and a screw rod, and a groove is provided at one end of the screw rod away from the head; The lock washer includes a base, a connecting rod, and a plow rod; the base is annular, the inner diameter of the base is greater than the outer diameter of the screw rod; the outer diameter of the base is greater than the outer diameter of the nut; the connecting rod is strip-shaped, and its two ends are respectively connected to the base and the plow rod; the height of the connecting rod is greater than the height of the nut; the connection part of the connecting rod and the base is located at the outer circle of the base.

2. The anti-loosening and non-removable bolt according to claim 1, characterized in that, The plow rod is strip-shaped, and the width of its cross-section gradually narrows in the direction towards the base, and the shape of the cross-section can be wedge-shaped, triangular, or trapezoidal; the narrow end of the cross-section of the plow rod faces the base.

3. The anti-loosening and non-removable bolt according to claim 2, wherein, The width of the groove is equal; the width of the widest part of the cross-section of the plow rod is greater than the width of the groove, and the width of the narrowest part of the cross-section of the plow rod is less than the width of the groove.

4. The anti-loosening and non-removable bolt according to claim 2, characterized in that, The width of the groove gradually narrows in the direction towards the base; the width of the narrowest part of the cross-section of the plow rod is less than the width of the widest part of the groove; the width of the widest part of the cross-section of the plow rod is greater than the width of the narrowest part of the groove.

5. A lock - preventing and non - detachable bolt according to claim 1, wherein, The groove is in a shape of a straight line, the number of the plow rods is one, and the number of the connecting rods is two.

6. The anti-loosening and non-detachable bolt according to claim 1, characterized in that, The groove is in a shape of a cross, the number of the plow rods is two, and the number of the connecting rods is four.

7. A lock - preventing and non - detachable bolt according to claim 4, characterized in that, The number of the plow rods is more than two, and the number of the connecting rods is twice the number of the plow rods.

8. A lock - preventing and non - detachable bolt according to claim 5 or 6, characterized in that, The distance between the connecting rods connected to both ends of the same plow rod is greater than the outer diameter of the nut.

9. The anti-loosening and non-detachable bolt according to claim 1, wherein The screw rod is provided with threads at one end away from the head, and the height of the groove in the axial direction of the screw rod is greater than or equal to the height of the part of the screw rod where the threads are arranged.

10. A lock - preventing and non - detachable bolt according to claim 1, characterized in that, The materials of the slotted bolt, the lock washer, and the nut are metal or non-metal; the connecting rods are respectively fixedly connected or integrally formed with the base and the plow rod.

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