CN219366519U

CN219366519U - Cage-type floating nut assembly

Info

Publication number: CN219366519U
Application number: CN202221354816.0U
Authority: CN
Inventors: 蒋岱宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2023-07-18
Anticipated expiration: 2032-06-01

Abstract

In order to solve the problems that the strength and rigidity of a cage per se cannot ensure that the nut can be fixed at a set position, the connection strength is obviously reduced and the like in the cage type floating nut in the prior art, the utility model provides a cage type floating nut assembly, which comprises the cage and the nut; the nut is square in appearance and is provided with a threaded hole in the middle; the cage is a rigid tetragonal body with the inner space being larger than the outer shape of the nut in three directions and is of a sheet metal stamping structure; the two upper opposite sides of the cage are folded inwards by ninety degrees to form an inner folded edge of the rigid square body, and the nut is limited in the inner space of the rigid square body; the other two upper opposite sides of the cage are folded outwards by ninety degrees to form welding joint edges; the centers of the upper cover and the bottom surface of the cage are penetrated and provided with through holes with diameters larger than that of the threaded holes. The cage type floating nut assembly has the beneficial technical effects of stability and reliability of the welding nut and flexibility and adaptability of the cage type floating nut.

Description

Cage-type floating nut assembly

Technical Field

The utility model relates to a car sheet metal bolt connection technology, in particular to a cage type floating nut assembly.

Background

In the technical field of automobile manufacturing, it is often necessary to perform bolting between sheet metal parts, that is, to drill a bolt hole in one sheet metal part to be connected, to weld a nut on the other sheet metal part to be connected, and then to screw the nut through the bolt hole with a bolt, thereby connecting the two sheet metal parts together. For example, the car driver seat is mounted on the frame by providing bolt holes on the guide rails, welding nuts on the frame cross member, and then fixing the guide rails on the frame cross member by bolts. However, due to the fact that the dimensional accuracy of the sheet metal structural part is low, errors exist when nuts are welded on the frame cross beam one by one, so that when the last bolt is screwed down, position errors are generated between the bolt hole and the nut, or coaxiality errors are generated, the bolt cannot be smoothly screwed into the nut, and serious reworking problems of re-welding the nut can be caused.

Aiming at the problems that the bolt holes and nuts of sheet metal parts are easy to generate position errors and coaxiality errors, the technology of cage-type floating nuts appears. The structure similar to a rectangular box body is adopted, the nut is arranged in the cage, and the cage is buckled at the connecting position of the sheet metal part through C-shaped fixing buckles on two cover edges of the cage (see figures 1 and 2, wherein a is the cage, b is the nut and C is the fixing buckle). When the bolt of the other sheet metal part to be connected needs to be screwed on the nut, the nut can freely move in the cage, so that the bolt can be screwed with the nut in the range of the free movement of the nut. Therefore, the problems caused by position errors and coaxiality errors of bolt holes and nuts which are easy to generate in the process of connecting sheet metal parts by bolts are solved. The nut of this method is called a "cage float nut" because it is housed in a cage and is free to move within a certain range. However, since the cage-type floating nut is fastened on the sheet metal part through the fixing buckle, in order to ensure the elasticity of the fixing buckle, the material for manufacturing the cage cannot be too thick, so that the strength and rigidity of the cage cannot ensure that the nut can be fixed at a set position. Because the axial positioning of the nut in the cage is dependent on the bending part of the fixing buckle, the contact area of the nut and the bending part of the fixing buckle is smaller, the axial direction of the nut is the main stress direction of the bolt connection structure, and the forced tension of the nut is likely to deform the fixing buckle, so that the connection strength is obviously reduced.

Obviously, the cage floating nut in the prior art has the problems that the strength and rigidity of the cage cannot ensure that the nut can be fixed at a set position, the connection strength is obviously reduced, and the like.

Disclosure of Invention

The utility model provides a cage type floating nut assembly, which aims to solve the problems that the strength and rigidity of a cage per se cannot ensure that the nut can be fixed at a set position, the connection strength is obviously reduced and the like in the cage type floating nut in the prior art.

The cage-type floating nut assembly comprises a cage and a nut; the nut is square in appearance and is provided with a threaded hole in the middle; the cage is a rigid tetragonal body with the inner space being larger than the outer shape of the nut in three directions and is of a sheet metal stamping structure; the two upper opposite sides of the cage are folded inwards by ninety degrees to form an inner folded edge of the rigid square body, and the nut is limited in the inner space of the rigid square body; the other two upper opposite sides of the cage are folded outwards by ninety degrees to form welding joint edges; the centers of the upper cover and the bottom surface of the cage are penetrated and provided with through holes with diameters larger than that of the threaded holes.

Further, the dimension of the inner space of the cage in three directions is more than 2.0mm larger than the corresponding dimension of the outer shape of the nut.

Further, the gap between the outer shape of the nut in the cage and the side wall of the cage is smaller than half of the difference between the diameter of the central through hole of the cage and the diameter of the threaded hole of the nut.

The cage type floating nut assembly has the beneficial technical effects of stability and reliability of the welding nut and flexibility and adaptability of the cage type floating nut.

Drawings

FIG. 1 is a three-dimensional schematic view of a cage floating nut of the prior art;

FIG. 2 is a schematic cross-sectional view of a cage floating nut of the prior art;

FIG. 3 is a three-dimensional schematic view of a cage floating nut assembly of the present utility model;

FIG. 4 is an exploded three-dimensional schematic view of the cage floating nut assembly of the present utility model.

The cage floating nut assembly of the present utility model is further described with reference to the accompanying drawings and detailed description.

Detailed Description

Fig. 3 is a three-dimensional schematic view of a cage-type floating nut assembly of the present utility model, fig. 4 is an exploded three-dimensional schematic view of a cage-type floating nut assembly of the present utility model, in which 1 is a cage, 1-1 is an inner flange, 1-3 is a welded joint edge, and 2 is a nut. As can be seen, the cage floating nut assembly of the present utility model comprises a cage 1 and a nut 2; the nut 2 is square in shape and is provided with a threaded hole in the middle; the cage 1 is a rigid square body with the inner space being larger than the outer shape of the nut in three directions and is of a sheet metal stamping structure; the two upper opposite sides of the cage are folded inwards by ninety degrees to form an inner folded edge 1-1 of the rigid square body, and the nut is limited in the inner space of the rigid square body; the other two upper opposite sides of the cage are folded outwards by ninety degrees to form welding joint edges 1-2; the centers of the upper cover and the bottom surface of the cage are penetrated and provided with through holes with diameters larger than that of the threaded holes. When the cage type floating nut assembly is particularly used, the cage type floating nut assembly is welded at a set position through welding lap joint edges, and as the inner space of the cage is larger than the outer shape of the nut in three directions, the nut can moderately move in the three directions in the cage. When another sheet metal part is mounted at the position, the fixing bolt can be screwed with the nut in the moving range of the nut, so that the problems caused by position errors and coaxiality errors of the bolt hole and the nut are solved. The cage of the cage type floating nut assembly is of a rigid structure of sheet metal stamping, so that the cage type floating nut assembly has the stability and reliability of welding nuts; the nut of the cage type floating nut assembly can move in the inner space of the cage, so that the cage type floating nut assembly has the flexibility and adaptability of a common cage type floating nut.

In order to meet the requirement of the movement distance of the nut in three directions as large as possible, the size of the inner space of the cage in the three directions is more than 2.0mm larger than the corresponding size of the appearance of the nut. Namely, the nuts can respectively move more than 2.0mm in three directions in the cage, so that accumulated errors in the assembly process are absorbed as much as possible, and the applicability is enhanced.

In order to avoid the nut from being blocked when moving in the cavity in the cage, the gap between the shape of the nut in the cage and the side wall of the cage is smaller than half of the difference value between the diameter of the central through hole of the cage and the diameter of the threaded hole of the nut. Thus, the bolt can be smoothly screwed into the threaded hole when the nut moves at will.

Obviously, the cage floating nut assembly has the beneficial technical effects of not only stability and reliability of the welding nut, but also flexibility and adaptability of the cage floating nut.

Claims

1. A cage floating nut assembly, comprising a cage and a nut; the nut is square in appearance and is provided with a threaded hole in the middle; the cage is a rigid tetragonal body with the inner space being larger than the outer shape of the nut in three directions and is of a sheet metal stamping structure; the two upper opposite sides of the cage are folded inwards by ninety degrees to form an inner folded edge of the rigid square body, and the nut is limited in the inner space of the rigid square body; the other two upper opposite sides of the cage are folded outwards by ninety degrees to form welding joint edges; the centers of the upper cover and the bottom surface of the cage are penetrated and provided with through holes with diameters larger than that of the threaded holes.

2. The cage floating nut assembly of claim 1, wherein the dimension of the interior space of said cage in all three directions is greater than the corresponding dimension of the profile of the nut by more than 2.0 mm.

3. Cage-type floating nut assembly according to claim 1 or 2, characterized in that the gap between the nut profile inside the cage and the side wall of the cage is less than half the difference between the diameter of the central through hole of the cage and the diameter of the threaded hole of the nut.