Fastener retaining device

Abstract

The utility model relates to the technical field of fasteners, in particular to a fastener retaining device which comprises a bolt and a nut, one end of the bolt far away from the nut is sleeved with a first flat washer, one end of the bolt close to the nut is sleeved with a second flat washer, and a retaining mechanism is arranged between the first flat washer and the second flat washer. According to the utility model, the defects in the prior art are overcome, two parts with through holes can be fastened and connected through the bolt and the nut, the contact area with the parts can be increased through the flat washer I and the flat washer II, and a blocking effect can be achieved to prevent the surface of a workpiece from being damaged; by means of the retaining mechanism, in the process that a nut is rotated to fasten a workpiece, the sleeving cylinder can move to different positions for adaptive use according to the thickness of a workpiece hole, when the bottom of the backing ring moves upwards under the action of force, the bent part can be bent and expand outwards, the expanded supporting arms can support the hole of the workpiece, and therefore the workpiece can be fastened. And the bolt can be positioned to the axis position of the cavity step by step in the deformation expansion process.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a fastener retaining device. Background Art

[0002] Fasteners are devices used to fasten two or more parts together. There are many types of fasteners, including screws, nuts, washers, pins, etc. They have excellent fastening performance and can withstand large tensile and rotational forces, thereby ensuring the safe operation of mechanical equipment. In addition, fasteners also have excellent durability and reliability and can be used for a long time in various harsh working environments.

[0003] The bolt consists of a head and a screw rod, which need to be matched with a nut to fasten two parts with through holes. The bolt needs to match the size of the through hole of the part when in use. When there is a large gap between the through hole size of the part and the bolt, it is difficult to accurately install the bolt to the axis position, and it is easy to cause uneven force on the bolt and the workpiece during the subsequent tightening process.

[0004] In order to solve the above technical problems, a fastener retaining device is proposed. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a fastener retaining device, which overcomes the deficiencies of the prior art and solves the problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fastener retaining device, comprising a bolt and a nut, wherein a flat washer 1 is sleeved on one end of the bolt away from the nut, and a flat washer 2 is sleeved on one end of the bolt close to the nut, and a retaining mechanism is arranged and installed between the flat washer 1 and the flat washer 2;

[0007] The retaining mechanism comprises a sleeve, a gasket and a support arm.

[0008] Two parts with through holes can be fastened and connected by bolts and nuts. Flat washers 1 and 2 can increase the contact area with the parts and have a barrier effect to prevent the surface of the workpiece from being damaged. The holding mechanism can be used to apply force to the washer to make the support arm bend and expand outward during the process of turning the nut to tighten the workpiece, so that the support arm can fill the cavity of the workpiece and locate the bolt position.

[0009] As a preferred technical solution of the utility model, a spring washer is sleeved on the bolt at the side of the flat washer away from the nut, and the spring washer is adapted to the structural size of the bolt.

[0010] The spring washer can provide a force to prevent loosening, increase the friction between the nut and the workpiece, tighten the workpiece during vibration, and prevent loosening between the nut and the workpiece.

[0011] As a preferred technical solution of the utility model, the sleeve is located above the gasket, and the sleeve and the gasket are connected by a support arm. An internal thread is formed inside the sleeve, the sleeve is threadedly connected to the bolt, and a bending portion is formed in the middle of the support arm.

[0012] The sleeve can be moved to different positions for adaptive use according to the thickness of the workpiece hole. When the bottom of the gasket ring moves upward under the action of force, the bending part can bend and expand outward. The extended support arm can support the hole of the workpiece and gradually position the bolt to the axial center of the hole during the deformation and expansion process.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Two parts with through holes can be fastened and connected by bolts and nuts. Flat washers 1 and 2 can increase the contact area with the parts and have a barrier effect to prevent damage to the surface of the workpiece. The retaining mechanism can move the sleeve to different positions according to the thickness of the workpiece hole for adaptive use during the process of turning the nut to tighten the workpiece. When the bottom of the gasket moves upward under the action of force, the bending part can bend and expand outward. The extended support arm can support the hole of the workpiece and gradually position the bolt to the axial center of the hole during the deformation and expansion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0016] Figure 2 It is a front view schematic diagram of the utility model;

[0017] Figure 3 It is a three-dimensional schematic diagram of the holding mechanism of the utility model;

[0018] Figure 4 For the utility model Figure 3 Partial schematic diagram at point A in the middle.

[0019] In the figure: 1, bolt; 2, nut; 3, flat washer 1; 4, flat washer 2; 5, spring washer; 6, socket; 7, gasket; 8, support arm; 801, bending part. DETAILED DESCRIPTION

[0020] 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 in 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.

[0021] See also Figure 1-4 A fastener retaining device comprises a bolt 1 and a nut 2, wherein a flat washer 3 is sleeved on one end of the bolt 1 away from the nut 2, and a flat washer 2 4 is sleeved on one end of the bolt 1 close to the nut 2, and a retaining mechanism is arranged and installed between the flat washer 3 and the flat washer 2 4, and the retaining mechanism comprises a sleeve tube 6, a gasket 7 and a support arm 8. The bolt 1 and the nut 2 can be used to fasten two parts with through holes, and the flat washer 3 and the flat washer 2 4 can increase the contact area with the parts, and can play a barrier effect to prevent the surface of the workpiece from being damaged. The retaining mechanism can be used to make the support arm 8 bend and expand outward by applying a force to the gasket 7 during the process of rotating the nut 2 to fasten the workpiece, so that the support arm 8 can be filled with the cavity of the workpiece, and the position of the bolt 1 can be positioned.

[0022] Specifically, a spring washer 5 is sleeved on the bolt 1 on the side of the flat washer 4 away from the nut 2. The spring washer 5 is adapted to the structural size of the bolt 1. The spring washer 5 can provide a force to prevent loosening, increase the friction between the nut 2 and the workpiece, tighten the workpiece during vibration, and prevent loosening between the nut 2 and the workpiece.

[0023] Specifically, the sleeve 6 is located above the gasket 7, and the sleeve 6 and the gasket 7 are connected by a support arm 8. An internal thread is formed inside the sleeve 6, and the sleeve 6 is threadedly connected to the bolt 1. A bending portion 801 is formed in the middle of the support arm 8. The sleeve 6 can be moved to different positions for adaptive use according to the thickness of the workpiece hole. When the bottom of the gasket 7 is moved upward by the force, the bending portion 801 can bend and expand outward. The expanded support arm 8 can support the hole of the workpiece and can gradually position the bolt 1 to the axial center position of the hole during the deformation and expansion process.

[0024] Working principle: First, two parts with through holes can be fastened and connected by bolt 1 and nut 2. Flat washer 1 3 and flat washer 2 4 can increase the contact area with the parts and have a barrier effect to prevent the surface of the workpiece from being damaged. The retaining mechanism can be used to fasten the workpiece by rotating nut 2. The sleeve 6 can be moved to different positions according to the thickness of the workpiece hole for adaptive use. When the bottom of the gasket 7 is moved upward by the force, the bending part 801 can bend and expand outward. The extended support arm 8 can support the hole of the workpiece and gradually position the bolt 1 to the axial center of the hole during the deformation and expansion process.

[0025] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. 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. Therefore, they cannot be understood as limitations on the present invention.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of 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.

[0027] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. 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 fastener retaining device, comprising a bolt (1) and a nut (2), characterized in that: The end of the bolt (1) away from the nut (2) is sleeved with a flat washer (3), the end of the bolt (1) close to the nut (2) is sleeved with a flat washer (4), and a retaining mechanism is arranged and installed between the flat washer (3) and the flat washer (4); The retaining mechanism comprises a sleeve (6), a gasket (7) and a support arm (8).

2. A fastener retaining device according to claim 1, characterized in that: A spring washer (5) is sleeved on the bolt (1) at the side of the second flat washer (4) away from the nut (2), and the spring washer (5) is compatible with the structural dimensions of the bolt (1).

3. A fastener retaining device according to claim 1, characterized in that: The sleeve tube (6) is located above the gasket ring (7), and the sleeve tube (6) and the gasket ring (7) are connected via a support arm (8).

4. A fastener retaining device according to claim 1, characterized in that: An internal thread is formed inside the sleeve (6), and the sleeve (6) is threadedly connected to the bolt (1).

5. A fastener retaining device according to claim 1, characterized in that: A bent portion (801) is formed in the middle of the support arm (8).

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