Inner double-tongue lock washer and thread fastening structure

Abstract

The utility model relates to an inner double-tongue lock washer and a thread fastening structure, and belongs to the field of armored vehicles. The lock washer comprises a washer body and two washer inner tongues, the gasket body is of a circular ring structure. The two gasket inner tongues are located in the gasket body and connected to the central symmetry position in the gasket body to form the gasket inner double tongues. The two gasket inner tongues each comprise a bent side vertical face, and the bent side vertical faces of the two gasket inner tongues face the same direction. The inner double tongues not only can better prevent relative movement between the gasket and a shaft, but also can effectively disperse load borne by the inner tongues, strength of the gasket is improved, and service life of the gasket is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of armored vehicles, and in particular relates to an inner double-tongue stop washer and a threaded fastening structure. Background Art

[0002] Vehicles are composed of many parts, components, and assemblies connected in different ways, among which the most important connection is threaded connection. Therefore, whether the threaded connection is firm directly affects the performance and quality of the vehicle. The combination of nuts and washers is a traditional threaded fastening structure. Armored vehicles usually use GB / T858-1988 "Stop Washers for Round Nuts", GB / T 855-1988 "Double Ear Stop Washers", GB / T93-1987 "Standard Spring Washers" and non-standard "Single Inner Tongue Stop Washers". These washers are widely used in various systems of armored vehicles, including power compartments, transmission boxes and other structures, in conjunction with corresponding nuts.

[0003] GB / T 858-1988 "Stop Washers for Round Nuts", the holes or grooves on the round nut threads are inserted into the inner teeth of the washers, and after the round nut is in place, the outer teeth of the stop washers are bent and inserted into the plate screw grooves of the round nut, and the above operation achieves the effect of preventing loosening. However, "Stop Washers for Round Nuts" are too bulky and do not save space, and are only used in conjunction with round nuts to prevent loosening and tightening.

[0004] GB 855-88 "Two-ear stop washers" use the two "ears" protruding from the outer ring of the washer to achieve the anti-loosening function. The "long ears" of the two-ear stop washers are bent close to the edge of the compressed part. When the hexagonal nut is tightened, the "short ears" of the two-ear stop washers are bent toward the nut and close to the axial vertical surface of the nut. The purpose of anti-loosening is achieved through the above method. However, the "two-ear stop washers" have high space requirements and are too thin, making them particularly easy to break.

[0005] GB / T 93-1987 "Standard Spring Washers" utilizes the material properties of spring steel to increase the compression and friction between threads through its own rebound force, thereby achieving the anti-loosening function. However, "Standard Spring Washers" are only used in ordinary anti-loosening situations and are prone to loosening in situations with high impact loads.

[0006] Single inner tongue stop washer is also a commonly used non-standard stop washer. The purpose of preventing loosening is achieved by slotting one side of the threaded rod and inserting the inner tongue into the groove. Due to the limited load-bearing capacity of the single inner tongue, the inner tongue part is very prone to fatigue fracture. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] The technical problem to be solved by the utility model is how to provide an inner double-tongue stop washer and a threaded fastening structure to solve the problem that the inner tongue part is very easy to fatigue and fracture due to the limited bearing capacity of a single inner tongue.

[0009] (II) Technical solution

[0010] In order to solve the above technical problems, the utility model provides an inner double-tongue stop washer, which includes: a washer body and two washer inner tongues;

[0011] The gasket body is a circular ring structure;

[0012] The two inner tongues of the gasket are located inside the gasket body and connected at the central symmetrical position inside the gasket body to form a double inner tongue of the gasket;

[0013] The inner tongues of the two washers both include curved side elevations, and the curved side elevations of the inner tongues of the two washers face the same direction.

[0014] Furthermore, the thickness of the double tongues inside the gasket is consistent with the thickness of the gasket.

[0015] Furthermore, the curved side elevation of the inner tongue of the gasket is at 90 degrees to the radial plane of the gasket.

[0016] A threaded fastening structure, comprising: a threaded rod (1), a nut (2) and the inner double-tongue stop washer (3);

[0017] The threaded rod (1) is grooved on two axial sides to required positions;

[0018] The inner double-tongue stop washer (3) is sleeved onto the threaded rod (1) in a specified direction, ensuring that the two inner tongues of the washer on the inner side of the washer fit with the grooved end surface of the threaded rod;

[0019] The nut (2) is screwed onto the threaded rod (1), and the nut (2) is tightly attached to the inner double-tongue retaining washer (3).

[0020] Furthermore, the outer ring diameter of the stop washer (3) is larger than the diagonal width of the nut (2).

[0021] Furthermore, the inner tongue of the washer is bent in a direction toward the mating nut (2).

[0022] Furthermore, the inner tongue of the washer is bent in a direction away from the mating nut (2).

[0023] Furthermore, the slot width of the threaded rod (1) must be consistent with the width of the inner tongue of the washer.

[0024] Furthermore, the radial distance between the grooved end faces of the threaded rod (1) is consistent with the radial distance between the double tongues in the washer.

[0025] Furthermore, the edge of the stop washer (3) is bent and fits against the side surface of the nut (2).

[0026] (III) Beneficial effects

[0027] The utility model provides an inner double-tongue stop washer and a threaded fastening structure, and the utility model has the following advantages:

[0028] 1. The structure of the inner double tongue is simple, so the processing technology is relatively simple.

[0029] 2. Compared with the outer ear or outer tongue stop washers, the larger outer ring does not need to adjust the side vertical position of the nut, and the outer ring of the washer can be bent at multiple angles to improve the anti-loosening effect of the washer.

[0030] 3. Compared with the single inner tongue structure design, the inner double tongue can not only better prevent the relative movement between the washer and the shaft, but also effectively disperse the load borne by the inner tongue, increase the strength of the washer and extend its service life.

[0031] 4. Compared with spring washers, inner double-tongue stop washers can be used in working environments with high anti-loosening requirements such as high loads and strong vibrations, such as power compartments and transmission boxes.

[0032] 5. The inner double-tongue stop washer has very low structural requirements for the matching nut. Both special nuts and ordinary nuts can be used. It has a higher degree of versatility than the stop washers for round nuts.

[0033] 6. The anti-loosening method of the inner double-tongue stop washer relies on the nut and the threaded parts connected to it. Therefore, the inner double-tongue stop washer has very low requirements for the installation position, while the anti-loosening method of the double-ear stop washer has higher requirements for the installation space.

[0034] 7. Double-ear stop washers are too thin and are particularly easy to break when used in high-load working environments. Internal double-tongue stop washers are relatively thick and have high strength, so they are not easy to break when used in environments with high load and vibration requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the inner double-tongue stop washer of the utility model;

[0036] Figure 2 This is a schematic diagram of the installation of the inner double-tongue stop washer of the utility model; DETAILED DESCRIPTION

[0037] In order to make the purpose, content and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments.

[0038] The purpose of the utility model is to provide an inner double-tongue stop washer, which changes the structure of the ordinary washer, satisfies the use environment without limitation, and can achieve the purpose of preventing loosening. Figure 1 shown.

[0039] like Figure 1 As shown, the inner double-tongue stop washer of the utility model comprises: a washer body and two washer inner tongues;

[0040] The gasket body is a circular ring structure;

[0041] The two inner tongues of the gasket are located inside the gasket body and connected at the central symmetrical position inside the gasket body to form a double inner tongue of the gasket;

[0042] The inner tongues of the two washers both include curved side elevations, and the curved side elevations of the inner tongues of the two washers face the same direction.

[0043] Among them, Figure 1 As shown, the double tongues in the gasket must be symmetrical in center.

[0044] Among them, the thickness of the double tongue inside the gasket is consistent with the thickness of the gasket.

[0045] The curved side elevation of the inner tongue of the gasket is at 90° to the radial plane of the gasket.

[0046] like Figure 2 As shown, the utility model also provides a threaded fastening structure, comprising: a threaded rod (1), a nut (2) and an inner double-tongue stop washer (3);

[0047] The threaded rod (1) is grooved on two axial sides to required positions;

[0048] The inner double-tongue stop washer (3) is sleeved onto the threaded rod (1) in a specified direction, ensuring that the two inner tongues of the washer on the inner side of the washer fit with the grooved end surface of the threaded rod;

[0049] The nut (2) is screwed onto the threaded rod (1), and the nut (2) is tightly attached to the inner double-tongue retaining washer (3).

[0050] The outer ring diameter of the stop washer (3) of the utility model is larger than the diagonal width of the nut (2).

[0051] If the installation space does not allow, the washer can be used in the forward or reverse direction, that is, the bending direction of the tongue inside the washer is toward or away from the mating nut (2).

[0052] The theoretical slot width of the threaded rod (1) must be consistent with the inner tongue width of the washer.

[0053] The radial distance between the grooved end faces of the threaded rod (1) is consistent with the radial distance between the double tongues in the washer.

[0054] The utility model also provides a method for installing a threaded fastening structure, comprising: a first step of slotting the two axial sides of a threaded rod (1) to be fastened to a required position; a second step of inserting an inner double-tongue stop washer (3) into the slot according to the direction shown in the figure, ensuring that the two inner tongues of the washer on the inner side of the washer fit with the slotted end face of the threaded rod; a third step of screwing in a nut (2); and a fourth step of selecting a side elevation of the nut (preferably parallel to the slotted end face of the threaded rod), and bending the edge of the stop washer (3) in this direction to fit with the side elevation of the nut.

[0055] The advantages of the utility model are as follows:

[0056] 1. The structure of the inner double tongue is simple, so the processing technology is relatively simple.

[0057] 2. Compared with the outer ear or outer tongue stop washers, the larger outer ring does not need to adjust the side vertical position of the nut, and the outer ring of the washer can be bent at multiple angles to improve the anti-loosening effect of the washer.

[0058] 3. Compared with the single inner tongue structure design, the inner double tongue can not only better prevent the relative movement between the washer and the shaft, but also effectively disperse the load borne by the inner tongue, increase the strength of the washer and extend its service life.

[0059] 4. Compared with spring washers, inner double-tongue stop washers can be used in working environments with high anti-loosening requirements such as high loads and strong vibrations, such as power compartments and transmission boxes.

[0060] 5. The inner double-tongue stop washer has very low structural requirements for the matching nut. Both special nuts and ordinary nuts can be used. It has a higher degree of versatility than the stop washers for round nuts.

[0061] 6. The anti-loosening method of the inner double-tongue stop washer relies on the nut and the threaded parts connected to it. Therefore, the inner double-tongue stop washer has very low requirements for the installation position, while the anti-loosening method of the double-ear stop washer has higher requirements for the installation space.

[0062] 7. Double-ear stop washers are too thin and are particularly easy to break when used in high-load working environments. Internal double-tongue stop washers are relatively thick and have high strength, so they are not easy to break when used in environments with high load and vibration requirements.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An inner double tongue stop washer, characterized in that: The stop washer comprises: a washer body and two washer inner tongues; The gasket body is a circular ring structure; The two inner tongues of the gasket are located inside the gasket body and connected at the central symmetrical position inside the gasket body to form a double inner tongue of the gasket; The inner tongues of the two washers both include curved side elevations, and the curved side elevations of the inner tongues of the two washers face the same direction.

2. The inner double tongue stop washer according to claim 1, characterized in that: The thickness of the double tongue inside the gasket is consistent with the thickness of the gasket.

3. A threaded fastening structure, characterized in that: include: A threaded rod (1), a nut (2) and an inner double-tongue stop washer (3) as claimed in claim 1 or 2; The threaded rod (1) is grooved on two axial sides to required positions; The inner double-tongue stop washer (3) is sleeved onto the threaded rod (1) in a specified direction, ensuring that the two inner tongues of the washer on the inner side of the washer fit with the grooved end surface of the threaded rod; The nut (2) is screwed onto the threaded rod (1), and the nut (2) is tightly attached to the inner double-tongue retaining washer (3).

4. The threaded fastening structure according to claim 3, characterized in that: The outer diameter of the locking washer (3) is larger than the diagonal width of the nut (2).

5. The threaded fastening structure according to claim 3, characterized in that: The inner tongue of the washer is bent toward the mating nut (2).

6. The threaded fastening structure according to claim 3, characterized in that: The inner tongue of the washer is bent away from the mating nut (2).

7. The threaded fastening structure according to claim 3, characterized in that: The width of the slot in the threaded rod (1) must match the width of the inner tongue of the washer.

8. The threaded fastening structure according to claim 3, characterized in that: The radial distance between the grooved end faces of the threaded rod (1) is consistent with the radial distance between the double tongues in the washer.

9. The threaded fastening structure according to any one of claims 3 to 8, characterized in that: The edge of the stop washer (3) is bent and fits against the side surface of the nut (2).

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