CN1318188C - Nut fixing device - Google Patents

Abstract

The present invention proposes a nut fixing device, which includes a sleeve and a base, wherein: the top of the sleeve is provided with a fixing groove for fixing the nut, and the bottom of the fixing groove is communicated with a counterbore for accommodating a protruding nut The bottom of the counterbore is connected with an elastic groove; the bottom of the sleeve is provided with a first assembly column; the base is provided with several assembly holes for the sleeve to be fixed in the assembly holes through its assembly column. The invention adopts the form of a sleeve and a base, which is convenient for quick installation and disassembly, greatly improves the versatility and modularity of the whole device, and is suitable for the nut assembly positions of parts of different structures, and can be replaced with different nuts. Sockets with different fixing grooves. Due to the principle of elastic deformation of the material itself, the nut is easy to fix and pick and place; at the same time, it is equipped with a positioning support structure, which greatly improves the assembly efficiency and quality.

Description

Nut Fixture

technical field

The invention belongs to the technical field of mechanical assembly, and in particular relates to a nut fixing device.

Background technique

Screw and nut assembly has been widely used in various fields of manufacturing and life, especially in electronic assembly and complete machine assembly. However, as the degree of integration of products becomes higher and higher, the space available for assembly becomes smaller and smaller, and the efficiency of assembly decreases greatly. Due to space constraints and efficiency requirements, the commonly used assembly fixtures for screw and nut sets are increasingly unsuitable for mass production. Therefore, it is even more important to improve the nut assembly fixture.

At present, in the assembly of the existing screw and nut sets, an electric screwdriver and a hexagonal sleeve device are often used for assembly.

When the device is in use, the nut is fixed with a sleeve to prevent the nut from rotating, and the other end uses an electric batch to assemble and fasten the components, structural parts, etc. with the nut.

However, the following disadvantages occur when the above-mentioned device is used for nut assembly:

1. Low efficiency

When assembling, it can only be assembled repeatedly in groups of one group, the production efficiency is low, the assembly quality is difficult to guarantee, and it does not meet the requirements of mass production.

2. High labor intensity

In the assembly of veneers, mother boards and structural parts, due to the barriers such as structural parts between the screws and nuts, especially when assembling large components, it is difficult to assemble and fix the nuts, which also increases the labor intensity of the staff.

Contents of the invention

In view of the above situation, the present invention proposes a nut fixing device to solve the problems of low efficiency and high labor intensity in the prior art.

To achieve the above object, the solution of the present invention is:

The present invention proposes a nut fixing device, which includes a sleeve and a base, wherein:

The top of the sleeve is provided with a fixing groove for fixing the nut, and the bottom of the fixing groove is connected with a counterbore for accommodating the screw rod of the protruding nut; the bottom of the counterbore is connected with an elastic groove; the sleeve is fixed on the on the base.

Wherein: the sleeve is fixed on the base through a flexible connection means: the bottom of the sleeve is provided with a first assembly column, and the base is correspondingly provided with an assembly hole, and the assembly column is fixed in the assembly hole and then the sleeve The cylinder is fixed on the base.

The sleeve is connected with the base through an interference fit.

The device also includes a positioning column. The positioning column is provided with a positioning head, a supporting surface and a second assembly column. The base is correspondingly provided with an assembly hole, and the positioning column is fixed in the assembly hole of the base through its assembly column.

The device also includes a support column, the support column is provided with a support surface and a third assembly column, and the base is correspondingly provided with an assembly hole, and the support column is fixed in the assembly hole of the base through its assembly column.

According to the different external structures of the nuts, the fixing grooves have corresponding shapes matching the external structures of the nuts.

The edge of the fixing groove is provided with a chamfered slope.

The depth of the counterbore is slightly greater than the protruding length of the screw.

The elastic groove can be an inline groove with a narrow upper part and a wider lower part to form an elastic space.

The upper part of the assembly column is provided with a shoulder.

The fixing device also includes a pressing block, through which the sleeve is connected to the base. Specifically, it means that the pressing block is fixed to the base through bolt connection, and the sleeve also includes a movable base, and a wedge is arranged on the movable base, through which the sleeve is pressed on the base.

The present invention proposes a nut fixing device, the beneficial effects brought by it are summarized as follows:

1. Simple structure. Because it is based on the principle of elastic deformation of the material itself, the fixing and picking and placing of nuts is simple; for different nuts, sleeves with different fixing grooves can be replaced.

2. Strong versatility. Because the sleeve is matched with the base, it is convenient for quick installation and disassembly, so that the versatility and modularity of the whole device are greatly improved, and it is suitable for the nut assembly position of parts of different structures.

3. High efficiency. It is suitable for the assembly of various needs, and is convenient for making a universal and adjustable positioning assembly structure. At the same time, it is equipped with a positioning support structure, which greatly improves the assembly efficiency and quality.

Description of drawings

Fig. 1 is a schematic structural view of a nut fixing device according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of the sleeve described in the embodiment of the present invention;

Fig. 3 is a schematic structural view of the base according to the embodiment of the present invention;

Fig. 4 is a structural schematic diagram of the positioning column described in the embodiment of the present invention;

Fig. 5 is a schematic structural view of the support column described in the embodiment of the present invention;

Fig. 6 is a schematic structural view of a nut fixing device formed by a sleeve and a movable base;

Fig. 7 is a schematic structural diagram of another embodiment of the present invention.

Detailed ways

As shown in Figure 2, it is the design concept of this basic unit of the sleeve of the present invention, that is, the sleeve needs:

First of all, according to the size and shape of the nut, design the sinking groove of the corresponding shape to fix the nut and prevent it from rotating during assembly;

It is required that the depth of the sinking groove should be the minimum thickness required to prevent the nut from rotating;

Design a chamfered slope on the edge of the sink to facilitate the insertion of the nut;

Design a counterbore slightly larger than the size of the screw to avoid screwing in the screw head;

Different forms of long grooves are milled on the sleeve to make the structure of the fixing nut have a certain degree of elasticity, which is suitable for the problem that the nut cannot be taken out of the sleeve after assembly due to many factors such as machining accuracy and over-positioning. ;

The depth of the long groove ensures that the nut fixing structure has a certain degree of elasticity, but it can also ensure relative rigidity to prevent rotation during nut assembly;

The shape of the sleeve is determined by the space in the assembly site, and it should be as small as possible while ensuring the structural strength and rigidity; the material of the sleeve is selected from metal materials such as stainless steel, and plastic nuts and screws can also be made of non-metallic materials;

In the multi-nut assembly, in order to facilitate fixing the sleeve on the base, different connection methods can be designed to fix the base (in this example, it is designed as an interference shaft form and an interference fit with the base). On the general-purpose multi-nut assembly base, the fixing of the sleeve and the base can adopt a flexible connection method that is easy to adjust;

On the multi-nut assembly base, design a positioning and supporting structure suitable for connecting workpieces such as veneers, so as to facilitate the supporting and positioning of the workpiece (in the following example, the form of positioning columns and supporting columns is used). In the embodiment of the present invention, a nut fixing device is formed by using a sleeve and a base. As shown in Figure 1, it is a schematic structural diagram of the nut fixing device according to the embodiment of the present invention. The whole device includes six M3 nut fixing sleeves 2 and a base 3, and is also equipped with 2 positioning columns 1 and 2 Support column (not marked in the figure).

As shown in Figure 2, it is a schematic structural view of the sleeve. The sleeve 2 is cylindrical, and its upper and lower parts are 21mm and 7.5mm respectively; the diameter of its upper end surface is 7.5mm, and the diameter of its lower end surface is 6mm. The top of the sleeve 2 is provided with a fixing groove 21. In this embodiment, an M3 hex nut is used as an example. The diameter is 6.38 mm and the depth is 1.5 mm to prevent the nut from rotating; the edge of the fixing groove 21 is provided with chamfers The inclined plane 211 is convenient for picking and placing the nut. The bottom of the fixing groove 21 is connected with a counterbore 22, the depth of which is 0.5 mm larger than that of the screw, for the reserved space when the screw is screwed in, which is 4 mm in this embodiment, and the diameter of the counterbore 22 is 4 mm. Connected with the bottom of the counterbore 22, there is an elastic groove 23. The elastic groove 23 is in the shape of a line. The diameter may be 3.5mm. The function of the elastic groove 23 is to make the entire sleeve structure have a certain degree of elasticity, so as to adapt to the problems that the nuts cannot be taken out from the sleeve 2 after assembly due to machining accuracy, over-positioning and many other factors after the assembly of multiple nuts. The bottom of the sleeve 2 is provided with a first assembly column 24, the sleeve is tightly fixed to the base through the first assembly column 24 by means of the shoulder provided on it, and the structure and size of the first assembly column 24 can be determined according to the base There are certain changes depending on the connection method. The overall size of the sleeve 2 changes with the space of the assembly site, and it should be as small as possible under the condition of ensuring the structural strength and rigidity. The material of the sleeve can be selected from metal materials such as stainless steel, and plastic nuts and screws can also be non-woven. Made of metal material.

As shown in Figure 3, it is a structural schematic diagram of the base 3, which is provided with 10 assembly holes, of which: 6 are used for fixing the sleeve 2; 2 are used for fixing the positioning column 1; 2 are used for Fixing of support column 4. In multi-nut assembly, in order to fix the sleeve 2 on the base 3, different connection methods can be designed to fix the base 3. In this embodiment, the form of the interference shaft is used for interference fit with the base.

As shown in Figure 4, it is a structural schematic diagram of the positioning column, and its upper part is a positioning head 41, which plays a standard positioning role; a supporting surface 42 is provided to place components such as veneers together with the supporting column; the lower part is provided with a second assembly column 43, Its length is 7.5 mm, relying on the shoulder provided on it, it is closely fixed with the base through the second assembly column 43, and its structure and size can be changed according to the different connection methods with the base. The diameter of the whole positioning column is 8mm, the diameter of the assembly column is 6mm, its overall height is 34mm, the height from the supporting surface 42 to the shoulder is 22mm, and the height of the positioning head 41 is 4.5mm. The function of the positioning column is to ensure accurate positioning of workpieces such as veneers or parts to be assembled. According to different components, the positioning method can be different. In this example, the positioning method required for locating the SS62FTB board is selected.

As shown in FIG. 5 , it is a structural schematic diagram of the supporting column, and its structure is similar to the above-mentioned positioning column, except that there is no positioning head structure, and the structure of the supporting surface 51 and the third assembly column 52 is still provided. Its overall height is 29.5mm and diameter is 8mm; among them, the assembly column is still 7.5mm and diameter is 6mm. The function of the support column is to place the veneer in the fixed frame stably together with the positioning column, so as to facilitate assembly.

Based on the structure of each part above, another embodiment of the nut fixing device is shown in FIG. 6 and FIG. 7 . Wherein, as shown in FIG. 6 , the sleeve further includes a movable base. The movable base is also processed with a wedge which is convenient for the compaction of the briquetting block. As shown in FIG. 7 , it is a schematic structural diagram of the nut fixing device. On the base with certain regular arrangement of connecting screw holes, the sleeve is fixed by a pressing block, so as to meet the requirements of different workpiece assembly nut positions. Specifically, the pressing block compresses the sleeve on the base through the wedge of the movable base, and then connects the pressing block and the base with bolts through corresponding screw holes. Through this solution, the sleeve can be conveniently and quickly installed at different positions on the base, and is easy to disassemble. In actual assembly, when fast fixing the bottom nut, the principle of elasticity of the sleeve itself is mainly used to realize the fixation and pick-and-place of the nut.

The nut fixing device of the embodiment of the present invention has the following advantages in actual assembly:

1. Simple structure. Because it is based on the principle of elastic deformation of the material itself, the fixing and picking and placing of nuts is simple; for different nuts, sleeves with different fixing grooves can be replaced.

2. Strong versatility. Because the sleeve is matched with the base, it is convenient for quick installation and disassembly, so that the versatility and modularity of the whole device are greatly improved, and it is suitable for the nut assembly position of parts of different structures.

3. High efficiency. It is suitable for the assembly of various needs, and is convenient for making a universal and adjustable positioning assembly structure. At the same time, it is equipped with a positioning support structure, which greatly improves the assembly efficiency and quality.

Claims (12)

1, a kind of nut fixing device is characterized in that, this device includes sleeve and base, wherein:

The top of this sleeve is provided with the holddown groove that is used for fixing nut, and this holddown groove bottom is communicated with counterbore, for holding the screw rod that protrudes nut; This counterbore bottom is communicated with elastic groove; This sleeve is fixed on this base by movable connection method.

2, a kind of nut fixing device as claimed in claim 1, it is characterized in that: described sleeve is fixed on this base by movable connection method and is meant: the bottom of sleeve is provided with the first assembling post, be correspondingly provided with pilot hole on the base, this assembling post is fixed in the described pilot hole and then with sleeve and is fixed on this base.

3, a kind of nut fixing device as claimed in claim 2 is characterized in that: described sleeve is connected with the mode of base by interference fit.

4, a kind of nut fixing device as claimed in claim 1, it is characterized in that: this device also includes reference column, this reference column is provided with positioning head, supporting surface and the second assembling post, be correspondingly provided with pilot hole on this base, this reference column is fixed in the pilot hole of this base by its assembling post.

5, as claim 1 or 4 described a kind of nut fixing devices, it is characterized in that: this device also includes support column, this support column is provided with supporting surface and the 3rd assembling post, is correspondingly provided with pilot hole on this base, and this support column is fixed in the pilot hole of this base by its assembling post.

6, a kind of nut fixing device as claimed in claim 1 is characterized in that: the respective shapes that described holddown groove mates for the contour structures with this nut according to the different contour structures of nut.

7, a kind of nut fixing device as claimed in claim 1, it is characterized in that: the edge of described holddown groove is provided with the chamfering inclined-plane.

8, a kind of nut fixing device as claimed in claim 1, it is characterized in that: the degree of depth of described counterbore is slightly larger than the length that screw rod stretches out.

9, a kind of nut fixing device as claimed in claim 1, it is characterized in that: described elastic groove can be the in-line groove, and its top is narrower, and the bottom broad forms elastic space.

10, as claim 2 or 4 described a kind of nut fixing devices, it is characterized in that: the top of described assembling post is provided with shoulder.

11, a kind of nut fixing device as claimed in claim 1, it is characterized in that: described fixture also includes briquetting, by briquetting described sleeve is connected with base.

12, a kind of nut fixing device as claimed in claim 11, it is characterized in that: described briquetting is connected and fixed on base by bolt, described sleeve also comprises a mobile base, and this mobile base is provided with the wedge mouth, by this wedge mouth sleeve is pressed on the base.

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