Combined lock nut

Abstract

The utility model discloses a combined lock nut which comprises an inner screwing piece and an outer limiting piece, a thread structure is located in a hollow cavity of the inner screwing piece, a limiting groove of a closed-loop structure is formed in the inner side wall of the outer limiting piece in a concave mode, and the first end of the inner screwing piece is limited in the outer limiting piece in the mode that the first end can rotate in the circumferential direction of the limiting groove. The first end of the inner screwing piece is clamped between the two opposite inner side faces of the limiting groove, the end face of the first end of the inner screwing piece is matched with one inner side face of the limiting groove in an attached mode, and the inner side face, matched with the end face of the first end of the inner screwing piece in an attached mode, of the two opposite inner side faces of the limiting groove and the end face of the first end of the inner screwing piece are limiting faces. In the two limiting surfaces, one limiting surface is convexly provided with a limiting boss, and the other limiting surface is concavely provided with a limiting groove in which the limiting boss is embedded and which limits the movement of the inner screwing piece in the radial direction; compared with the prior art, the nut body is not easy to loosen, so that the service life of the tire screw is longer.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire nut anti-loose technical field, especially in combination formula anti-loose nut. BACKGROUND

[0002] Tire is generally installed on the both ends of axle through the cooperation of screw rod and nut, and the both ends of axle have tire screw rod which extends transversely outside the car, the hub of tire is screwed on the tire screw rod through the nut and washer to install the tire, the washer is used for protecting the base surface of connecting portion, and the installation sequence is that the washer is installed on the tire screw rod first, then the nut is screwed on the tire screw rod, and the nut is pressed on the washer. However, in order to facilitate disassembly and assembly, the inner diameter of the nut is generally slightly larger than the outer diameter of the screw rod, and due to the difference in diameter, combined with the bumping and vibration of the automobile, the nut is easy to move in the radial direction, so that the axis center of the nut cannot be on the same straight line with the axis center of the screw rod, which is easy to cause the hub center line of the installed hub to be not on the same axis with the center line of the wheel, so that the tire screw rod is easy to produce great shearing force when the automobile works, thereby causing the screw rod to be easy to break, and shortening the service life of the tire screw rod.

[0003] Therefore, the present inventor has made a deep research on the problem, and thus the present application is produced. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a kind of combination formula anti-loose nuts, to solve the problem that existing nut is easy to loosen in radial direction, cause tire screw rod short service life.

[0005] In order to achieve the purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a combined check nut, including the nut body, the nut body is hollow structure and is open in both ends, and the inner side wall of nut body is equipped with the thread structure matched with the outer thread of tire screw rod, the nut body includes the inner screw and outer limiting piece, and the inner screw and outer limiting piece are all hollow structure and are open in both ends, and the thread structure is in the hollow chamber of inner screw, the inner side wall of outer limiting piece is recessed and is equipped with the limiting groove of closed loop structure, the first end of inner screw is limited in the outer limiting piece in the mode that can rotate along the limiting groove circumference, and the first end of inner screw is clamped between the opposite two inner sides of limiting groove, the first end face of inner screw is in close fit with one of the inner sides of limiting groove, and the opposite two inner sides of limiting groove are all limiting surfaces with the first end face of inner screw in close fit with one of the inner sides of limiting groove and the first end face of inner screw, and the limiting surfaces are all limiting surfaces with one of the limiting surfaces of the opposite two limiting surfaces and the first end face of inner screw in close fit and the first end face of inner screw, and the limiting surfaces are all limiting surfaces with one of the limiting surfaces of the opposite two limiting surfaces and the first end face of inner screw in close fit and the first end face of inner screw, and the limiting surfaces are all limiting surfaces with one of the limiting surfaces of the opposite two limiting surfaces and the first end face of inner screw in close fit and the first end face of inner screw, and the limiting surfaces are all limiting surfaces with one of the limiting surfaces of the opposite two limiting surfaces and the first end face of inner screw in close fit and the first end face of inner screw, and the limiting surfaces are all limiting surfaces with one of the limiting surfaces of the opposite two limiting surfaces and the first end face of inner screw in close fit and the first end face of inner screw, and the limiting surfaces are all limiting surfaces with one of the limiting surfaces of the opposite two limiting surfaces and the first end face of inner screw in close fit and the first end face of inner screw, and the limiting surfaces are all limiting surfaces with one of the limiting surfaces of the opposite two limiting surfaces and the first end face of inner screw in close fit and the first end face of inner screw, and the limiting surfaces are all limiting surfaces with one of the limiting surfaces of the opposite two limiting surfaces and the first end face of inner screw in close fit and the first end face of inner screw, and the limiting surfaces are all limiting surfaces with

[0007] The outer limiting piece has a first sheet, an outer sleeve and a second sheet, the first sheet and the second sheet are both closed loop hollow structures, the outer sleeve is a hollow cylindrical structure open at both ends, the first sheet and the second sheet are respectively located at the two end portions of the inner side wall of the outer sleeve, the first sheet and the second sheet are oppositely spaced, and the axes of the first sheet, the outer sleeve and the second sheet are on the same straight line, the first end of the inner screw is limited in the limiting groove formed between the first sheet, the outer sleeve and the second sheet, the outer diameter of the limiting rotating block on the outer side wall of the first end of the inner screw is greater than the outer diameter of the inner screw, the limiting rotating block is a closed loop structure, and the limiting rotating block is located in the limiting groove, and the opposite two surfaces of the limiting rotating block are in close fit with the opposite surfaces of the first sheet and the second sheet.

[0008] Taking one end of the inner screw as left, the inner screw is a hollow strip structure extending in the left-right direction, the right end cross section of the inner screw is a polygonal structure, the limiting rotating block is located on the outer side wall of the left end of the inner screw, and the outer diameter of the limiting rotating block is greater than the outer diameter of the inner screw, the left side of the inner screw is provided with a circular boss gradually tapering from right to left, the right side of the first sheet is recessed at the position of the open mouth of the first sheet and is provided with a circular groove gradually tapering from right to left and embedding the circular boss, the circular boss is the limiting boss, the circular groove is the limiting groove, and the outer side wall of the circular boss and the inner side wall of the circular groove constitute the limiting surface.

[0009] The right side of the first piece body is provided with a circular truncated cone which penetrates through the left-right direction and is tapered from left to right, and the left side of the inner screwing piece is provided with a circular groove which is tapered from left to right and in which the circular truncated cone is embedded, the outer side wall of the circular truncated cone and the inner side wall of the circular groove form the limiting surface.

[0010] Compared with the prior art, the limiting convex and the limiting groove are arranged, the inner screwing piece can rotate around the outer limiting piece and can move horizontally on the tire screw rod, the limiting convex and the limiting groove are matched and embedded together, the inner screwing piece is not easy to move in the radial direction, so that the axis of the inner screwing piece, the outer limiting piece and the tire screw rod is always on the same straight line, the entire nut body is not easy to loosen, the shearing force on the tire screw rod is reduced, the tire screw rod is prevented from being broken, and the service life of the tire screw rod is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structure schematic view of the utility model.

[0012] Figure 2 It is a sectional structure schematic view of the utility model embodiment one.

[0013] Figure 3 It is a structure schematic view of the inner screwing piece of the utility model embodiment one.

[0014] Figure 4 It is a structure schematic view of the outer limiting piece 2 of the utility model embodiment one which omits the second piece body.

[0015] Figure 5 It is a sectional structure schematic view of the utility model embodiment two. DETAILED DESCRIPTION

[0016] In order to further explain the technical scheme of the utility model, the following will be described in detail in combination with the drawings.

[0017] One embodiment of the combined anti-loose nut is as follows, Figures 1-4The nut body is a hollow cylinder structure with both ends open, and a thread structure matched with the outer thread of the tire screw rod is arranged on the inner side wall of the nut body. The nut body includes an inner screw member 1 and an outer limiting member 2, both of which are hollow structures with both ends open. The thread structure is in the hollow chamber of the inner screw member 1, that is, the inner side wall of the inner screw member 1 has an internal thread, and the inner side wall of the outer limiting member 2 is recessed with a limiting groove 100 in a closed loop structure. The first end of the inner screw member 1 is limited in the outer limiting member 2 in a way that it can rotate circumferentially along the limiting groove 100. Specifically, the outer limiting member 2 has a first sheet body 21, an outer sleeve body 22 and a second sheet body 23. The first sheet body 21 and the second sheet body 23 are both closed loop hollow structures, and the outer sleeve body 22 is a hollow cylindrical structure with both ends open. The first sheet body 21 and the second sheet body 23 are respectively arranged on the left and right end portions of the inner side wall of the outer sleeve body 22. The first sheet body 21 and the second sheet body 23 are arranged in opposite directions, and the axes of the first sheet body 21, the outer sleeve body 22, the second sheet body 23 and the inner screw member 1 are on the same straight line. The first sheet body 21, the outer sleeve body 22 and the second sheet body 23 form the above-mentioned limiting groove 100 for limiting the first end of the inner screw member 1. The left outer side wall of the inner screw member 1 is protruded with a limiting rotating block 3 with an outer diameter larger than that of the inner screw member 1. The limiting rotating block 3 is in a closed loop structure and is in the limiting groove 100. The opposite surfaces of the limiting rotating block 3 are respectively in close contact with the opposite surfaces of the first sheet body 21 and the second sheet body 22. In application, the hub is installed on the tire screw rod, the end of the tire screw rod away from the hub is inserted into the hollow chamber of the inner screw member 1 and passes through the outer limiting member 2, the inner screw member 1 is rotated, and the inner screw member 1 is horizontally pushed towards the hub along the tire screw rod. The outer limiting member 2 also moves horizontally with the inner screw member 1. In addition, the arrangement of the limiting rotating block 3 is conducive to the circumferential rotation of the inner screw member 1 along the outer limiting member 2, and increases the contact area between the inner screw member 1 and the outer limiting member 2, that is, the contact area between the left side of the nut body and the hub component, thereby increasing the locking force of the nut body.

[0018] The first end of the inner screwing piece 1 is clamped between the opposite two inner sides of the limiting groove 100, the first end face of the inner screwing piece 1 is in close fit with one of the inner sides of the limiting groove 100, and the inner side of the limiting groove 100 in close fit with the first end face of the inner screwing piece 1 and the first end face of the inner screwing piece 1 are both limiting surfaces, one of the two limiting surfaces is provided with a limiting boss in a hollow circular truncated cone structure protruding towards the direction of the other limiting surface, and the other limiting surface is provided with a limiting groove for embedding the limiting boss and limiting the movement of the inner screwing piece 1 in the radial direction of the inner screwing piece 1, the limiting boss and the limiting groove increase or decrease along the extension direction of the axis of the nut body, the increasing or decreasing trend of the limiting boss and the limiting groove is consistent, and the axis of the limiting boss and the axis of the limiting groove are on the same straight line as the axis of the inner screwing piece 1; specifically, the inner screwing piece 1 is in a hollow strip shape extending in the left-right direction, the right end cross section of the inner screwing piece 1 is in a polygonal structure, the right end cross section of the inner screwing piece 1 is in a pentagonal or hexagonal structure, which facilitates the rotation of the inner screwing piece 1 by a wrench, the limiting rotating block 3 is on the left end outer side wall of the inner screwing piece 1, and the outer diameter of the limiting rotating block 3 is greater than the outer diameter of the inner screwing piece 1, the left side of the inner screwing piece 1 is provided with a circular boss 4 tapering from right to left, the right side of the first sheet body 21 is recessed with a circular groove 200 tapering from right to left and embedding the circular boss 4, the opening of the first sheet body 21 falls within the range of the circular groove 200, the circular boss 4 is the above-mentioned limiting boss, the circular groove 200 is the above-mentioned limiting groove, the outer side wall of the circular boss 4 and the inner side wall of the circular groove 200 constitute the above-mentioned limiting surface, that is, the taper degrees of the circular boss 4 and the circular groove 200 are the same, the extension directions are consistent, and the axis of the circular boss 4 and the axis of the circular groove 200 are on the same straight line as the axis direction of the inner screwing piece 1. In application, the circular boss 4 is embedded in the circular groove 200, the inner screwing piece 1 is continuously pushed horizontally along the tire screw rod towards the hub direction until the first sheet body 21 is clamped between the hub and the inner screwing piece 1, and the hub is locked between the nut body and the axle. At the same time, under the concave-convex cooperation of the circular boss 4 and the circular groove 200, the inner screwing piece 1 after being tightened is not easy to move up and down, so that the axis of the inner screwing piece 1, the outer limiting piece 2 and the tire screw rod are on the same straight line, the shearing force of the tire on the tire screw rod is reduced, and the tire screw rod is not easy to break.

[0019] The application discloses a combined anti-loose nut, which is applied to a vehicle axle extending in the left-right direction, and is used for locking a tire hub of a tire on the right side of the vehicle axle.

[0020] An embodiment two of the combined anti-loose nut is shown in Figure 5 The difference between the embodiment two and the embodiment one is that the positions of the limiting convexes and the limiting grooves are different, and specifically, a circular table 5 which is tapered from left to right and penetrates through the right side of the first sheet 21 in the left-right direction is protruded to the right side, and a circular groove 300 which is tapered from left to right and in which the circular table 5 is embedded is recessed to the left side of the inner screw piece 1, the circular table 5 is the limiting convex, the circular groove 300 is the limiting groove, and the outer side wall of the circular table 5 and the inner side wall of the circular groove form the limiting face. Similarly, the circular groove 300 and the circular table 5 are both tapered structures and are tapered from left to right, and in the process of continuously locking the inner screw piece 1, the inner screw piece 1 and the outer limiting piece 2 are locked more and more tightly, and it is not easy to move the inner screw piece 1 and the outer limiting piece 2 in the radial direction, so that the axis of the inner screw piece 1, the outer limiting piece 2 and the tire screw rod is always on the same straight line, the whole nut body is not easy to loosen, the shearing force on the tire screw rod is reduced, the tire screw rod is prevented from being broken, and the service life of the tire screw rod is prolonged.

[0021] The product form of the utility model is not limited to the case of the drawings and the embodiments, and any person can appropriately change or modify the similar ideas, which should be regarded as not departing from the patent category of the utility model.

Claims

1. A combined anti-loosening nut, comprising a nut body, the nut body having a hollow structure with open ends, and the inner sidewall of the nut body having a threaded structure that matches the external thread of a tire bolt; characterized in that: The nut body includes an inner threaded engagement component and an outer limiting component. Both the inner threaded engagement component and the outer limiting component are hollow structures with open ends. The threaded structure is located within the hollow cavity of the inner threaded engagement component. The inner sidewall of the outer limiting component is recessed with a limiting groove of a closed ring structure. The first end of the inner threaded engagement component is limited within the outer limiting component in a manner that allows it to rotate circumferentially along the limiting groove. The first end of the inner threaded engagement component is clamped between two opposing inner surfaces of the limiting groove. The end face of the first end of the inner threaded engagement component is in contact with one of the inner surfaces of the limiting groove, and the two opposing inner surfaces of the limiting groove are in contact with the first end of the inner threaded engagement component. The inner surfaces of the mating end faces and the first end face of the internal threaded engagement are both limiting surfaces. One limiting surface has a limiting boss with a hollow frustum structure, and the other limiting surface has a limiting groove for the limiting boss to be embedded in and for restricting the movement of the internal threaded engagement in the radial direction. The limiting boss and the limiting groove increase or decrease along the axial direction of the nut body. The direction of the increase or decrease of the limiting boss and the limiting groove is consistent, and the axes of the limiting boss and the limiting groove are on the same straight line as the axis of the internal threaded engagement.

2. The combined anti-loosening nut according to claim 1, characterized in that: The outer limiting member has a first piece, an outer sleeve, and a second piece. Both the first and second pieces are closed-loop hollow structures. The outer sleeve is a hollow cylindrical structure with open ends. The first and second pieces are located at the two ends of the inner sidewall of the outer sleeve, respectively. The first and second pieces are arranged at intervals relative to each other, and the axes of the first, outer, and second pieces are on the same straight line. The first, outer, and second pieces form the aforementioned limiting groove for limiting the first end of the internal threaded engagement member. The outer sidewall of the first end of the internal threaded engagement member is provided with a limiting rotating block whose outer diameter is larger than that of the internal threaded engagement member. The limiting rotating block is a closed-loop structure and is located in the limiting groove. The two opposite sides of the limiting rotating block are respectively in contact with the opposite sides of the first and second pieces.

3. A combined anti-loosening nut according to claim 2, characterized in that: With the end where the internal threaded assembly is located as left, the internal threaded assembly is a hollow strip structure extending in the left-right direction. The cross-section of the right end of the internal threaded assembly is a polygonal structure. The limiting rotating block is located on the outer side wall of the left end of the internal threaded assembly, and the outer diameter of the limiting rotating block is larger than the outer diameter of the internal threaded assembly. The left side of the internal threaded assembly is provided with a circular boss that gradually tapers from right to left. The right side of the first piece is provided with a circular groove that gradually tapers from right to left at the open position of the first piece, into which the circular boss is embedded. The circular boss is the aforementioned limiting boss, and the circular groove is the aforementioned limiting groove. The outer side wall of the circular boss and the inner side wall of the circular groove constitute the aforementioned limiting surface.

4. A combined anti-loosening nut according to claim 2, characterized in that: With the end where the internal threaded assembly is located as left, the right side of the first piece has a convex truncated cone that extends through the left and right directions and gradually tapers from left to right. The left side of the internal threaded assembly has a recessed circular groove that tapers from left to right and into which the truncated cone is embedded. The truncated cone is the aforementioned limiting protrusion, and the circular groove is the aforementioned limiting groove. The outer side wall of the truncated cone and the inner side wall of the circular groove constitute the aforementioned limiting surface.

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