Steel nut connection structure for aluminum alloy special equipment

Abstract

The application discloses a steel nut connecting structure for aluminum alloy special equipment, which comprises an inverse taper steel nut, an aluminum alloy auxiliary seat, an aluminum alloy base body of a vehicle body, an assembling part and a connecting bolt. The inverse taper steel nut comprises a screw rod section and an inverse taper section. The inverse taper section is in the shape of a circular truncated cone, and a small end surface of the inverse taper section is connected with an end surface of the screw rod section. Threaded through holes with the same diameter are formed in the screw rod section and the inverse taper section and are in communication with each other. The aluminum alloy auxiliary seat is in the shape of a cylinder, and the aluminum alloy auxiliary seat is provided with an internal thread. The inverse taper steel nut with a surface coated with locking glue is screwed into the aluminum alloy auxiliary seat, and a large end surface of the inverse taper section is flush with an end surface of the aluminum alloy auxiliary seat. The aluminum alloy auxiliary seat is welded on the aluminum alloy base body of the vehicle body, and the large end surface of the inverse taper section is attached to the aluminum alloy base body of the vehicle body. The assembling part is attached to one end of the aluminum alloy auxiliary seat, and the connecting bolt is screwed into the inverse taper steel nut through the assembling part and the aluminum alloy auxiliary seat. The nut has very strong anti-rotation and anti-falling abilities.

Description

TECHNICAL FIELD

[0001] The present application relates to a steel sleeve connection structure for aluminum alloy special equipment. BACKGROUND

[0002] The working principle of the ordinary steel sleeve: aluminum alloy material special equipment uses a large number of bolt coupling fastening assembly parts, but because the hardness of the aluminum alloy material is low, the thread formed on the inner hole surface is easily damaged and fails. Therefore, the industry generally uses steel sleeves to solve this situation.

[0003] At present, the outer circle of the steel sleeve used in the industry is a cylindrical surface, and because the external thread of the steel sleeve and the aluminum alloy light hole form a spiral pair with weak bearing capacity, in the use process, when the sleeve is continuously vibrated or subjected to a large external force, it is easy to rotate loose or directly fall out in the aluminum alloy pedestal (or aluminum alloy base).

[0004] Therefore, it is necessary to develop a steel sleeve connection structure that can solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a steel sleeve connection structure for aluminum alloy special equipment to solve the problems in the prior art.

[0006] The technical scheme adopted to achieve the purpose of the present application is as follows: a steel sleeve connection structure for aluminum alloy special equipment, comprising an inverted cone steel sleeve, an aluminum alloy pedestal, an aluminum alloy base of a vehicle body, an assembly part and a connecting bolt.

[0007] The inverted cone steel sleeve comprises a screw rod section and an inverted cone section, and the screw rod section is provided with external threads.

[0008] The inverted cone section is in the shape of a truncated cone, the small end face of the inverted cone section is connected with the end face of the screw rod section, and the screw rod section is coaxial with the inverted cone section.

[0009] The screw rod section and the inverted cone section are provided with thread through holes with the same diameter and are in communication with each other.

[0010] The aluminum alloy pedestal is in the shape of a cylinder, the aluminum alloy pedestal is provided with internal threads with a length consistent with the total length of the inverted cone steel sleeve, the inverted cone steel sleeve with a surface coated with locking glue is screwed into the aluminum alloy pedestal, and the large end face of the inverted cone section is flush with the end face of the aluminum alloy pedestal.

[0011] The aluminum alloy pedestal is welded to the aluminum alloy base of the vehicle body at the end where the large end face of the inverted cone section is flush with the aluminum alloy base of the vehicle body.

[0012] The assembly part is attached to the end of the aluminum alloy pedestal away from the aluminum alloy base of the vehicle body, the connecting bolt passes through the assembly part and the aluminum alloy pedestal and is screwed into the inverted cone steel sleeve.

[0013] Further, the reverse taper steel sleeve is screwed into the aluminum alloy attachment seat by a non-impact electric or pneumatic wrench.

[0014] Further, the internal thread of the aluminum alloy attachment seat is processed by a head tapping tap.

[0015] The beneficial effects of the present application are:

[0016] 1. The structure effectively avoids the self-rotation and loosening of the sleeve during use due to vibration;

[0017] 2. The structure significantly improves the anti-disengagement capability of the sleeve in the attachment (or base) under external force;

[0018] 3. After using the sleeve of the present application, the process is greatly improved, and the large noise generated when the sleeve is screwed into the attachment can be effectively eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the reverse taper steel sleeve;

[0020] Figure 2 is a schematic view of the aluminum alloy attachment seat;

[0021] Figure 3 is an assembly view of the reverse taper steel sleeve and the aluminum alloy attachment seat;

[0022] Figure 4 is a schematic view of the application of the reverse taper steel sleeve.

[0023] In the figure: screw rod section 1, reverse taper section 2, aluminum alloy attachment seat 3, vehicle body aluminum alloy base 4, assembly part 5 and connecting bolt 6. DETAILED DESCRIPTION

[0024] The present application will be further described below in conjunction with examples, but should not be understood as limiting the above-mentioned subject matter of the present application to the following examples. Various substitutions and modifications can be made according to ordinary technical knowledge and conventional means in the art without departing from the technical idea of the present application, and all such substitutions and modifications shall be included in the protection scope of the present application.

[0025] The present embodiment discloses a steel sleeve connection structure for aluminum alloy special equipment, which comprises a reverse taper steel sleeve, an aluminum alloy attachment seat 3, a vehicle body aluminum alloy base 4, an assembly part 5 and a connecting bolt 6.

[0026] Referring to Figure 1 , the reverse taper steel sleeve comprises a screw rod section 1 and a reverse taper section 2, and the screw rod section 1 is provided with an external thread.

[0027] The reverse taper section 2 is in the shape of a circular truncated cone, the small end face of the reverse taper section 2 is connected with the end face of the screw rod section 1, and the screw rod section 1 is coaxial with the reverse taper section 2.

[0028] The screw segment 1 and the reverse taper segment 2 are provided with threaded through holes with consistent diameters and are communicated with each other.

[0029] Referring to Figure 2 , the aluminum alloy attachment 3 is in a cylindrical structure, and the aluminum alloy attachment 3 is provided with an internal thread with a length consistent with the total length of the reverse taper steel screw sleeve, and the internal thread of the aluminum alloy attachment 3 is processed by a head tapping tap. Referring to Figure 3 , the reverse taper steel screw sleeve coated with locking glue is tapped into the aluminum alloy attachment 3 by a non-impact electric or pneumatic wrench, and the large end surface of the reverse taper segment 2 is flush with the end surface of the aluminum alloy attachment 3.

[0030] Referring to Figure 4 , the aluminum alloy attachment 3 is welded to the vehicle body aluminum alloy base 4 at the end flush with the large end surface of the reverse taper segment 2, and the large end surface of the reverse taper segment 2 is attached to the vehicle body aluminum alloy base 4.

[0031] The assembly part 5 is attached to the end of the aluminum alloy attachment 3 away from the vehicle body aluminum alloy base 4, and the connecting bolt 6 is screwed into the reverse taper steel screw sleeve through the assembly part 5 and the aluminum alloy attachment 3.

[0032] Before installation, the positions of the reverse taper steel screw sleeves commonly used in aluminum alloy equipment and the specifications and models of the reverse taper steel screw sleeves are counted and sorted. Combined with the stress conditions of the reverse taper steel screw sleeves in each position, the specifications and models of the reverse taper steel screw sleeves are determined. The use position is clear, and the reverse taper steel screw sleeves, aluminum alloy attachments and related parts of each specification and model are prepared. The material, plating and heat treatment method of the reverse taper steel screw sleeve are the same as those of the ordinary steel screw sleeve.

[0033] During installation, referring to Figure 2 , the head tapping tap is used to pre-tap the smooth hole of the aluminum alloy attachment 3 to accurately guide the tapping of the reverse taper steel screw sleeve, and the tapping depth is the total length of the reverse taper steel screw sleeve, while the pre-tapping of the ordinary screw sleeve attachment is only 3-5 pitch depths. A large torque force is required when the screw sleeve is forcibly tapped into the unthreaded part of the attachment, and a large noise will be generated in the process. The tapping depth of the present embodiment is the total length of the reverse taper steel screw sleeve, which can greatly reduce the noise when the reverse taper steel screw sleeve is tapped. Referring to Figure 3 , the reverse taper steel screw sleeve is tapped into the aluminum alloy attachment 3 by a non-impact electric or pneumatic wrench, and the large end surface of the reverse taper segment 2 is flush with the end surface of the aluminum alloy attachment 3. Referring to Figure 4The aluminum alloy attachment 3 equipped with the reverse taper steel sleeve is welded on the aluminum alloy base body 4 of the vehicle body, and the large end surface of the reverse taper section 2 is attached to the aluminum alloy base body 4. In this welding mode, the reverse taper steel sleeve is subjected to outward pulling force and vibration, and the reverse taper surface plays a role in preventing rotation and falling off. When the reverse taper steel sleeve is subjected to inward thrust force and vibration, the force is accepted by the end surface of the attachment and is unloaded to the base body. The inward rotation force of the reverse taper steel sleeve is prevented from rotating due to the large end surface of the reverse taper steel sleeve abutting against the base body. The assembly process and method of the reverse taper steel sleeve and other components are the same. The assembly part 5 is attached to the end of the aluminum alloy attachment 3 away from the aluminum alloy base body 4 of the vehicle body, and the connecting bolt 6 passes through the assembly part 5 and the aluminum alloy attachment 3 and is screwed into the sleeve.

[0034] It is worth mentioning that the reverse taper steel sleeve of the aluminum alloy material has good reliability, innovation and practicality. The reverse taper sleeve structure designed by innovation greatly improves the anti-rotation and anti-falling off ability of the sleeve under the premise that the aluminum alloy attachment (or aluminum alloy base body) is a through hole.

Claims

1. A steel sleeve connection structure for aluminum alloy special equipment, characterized by: The anti-cone steel sleeve, the aluminum alloy auxiliary seat (3), the aluminum alloy base body (4), the assembling part (5) and the connecting bolt (6); The anti-cone steel sleeve comprises a screw rod section (1) and an anti-cone section (2), and the screw rod section (1) is provided with external threads; The anti-cone section (2) is in the shape of a circular truncated cone, and the small end surface of the anti-cone section (2) is connected with the end surface of the screw rod section (1), and the screw rod section (1) is coaxial with the anti-cone section (2); The screw rod section (1) and the anti-cone section (2) are provided with through holes with the same diameter and are in communication with each other; The aluminum alloy auxiliary seat (3) is in the shape of a cylinder, and the aluminum alloy auxiliary seat (3) is provided with internal threads with the same length as the total length of the anti-cone steel sleeve, and the anti-cone steel sleeve with a locking adhesive on the surface is screwed into the aluminum alloy auxiliary seat (3), and the large end surface of the anti-cone section (2) is flush with the end surface of the aluminum alloy auxiliary seat (3); The aluminum alloy auxiliary seat (3) is welded to the aluminum alloy base body (4) at the end surface flush with the large end surface of the anti-cone section (2), and the large end surface of the anti-cone section (2) is attached to the aluminum alloy base body (4); The assembling part (5) is attached to the end of the aluminum alloy auxiliary seat (3) away from the aluminum alloy base body (4), and the connecting bolt (6) passes through the assembling part (5) and the aluminum alloy auxiliary seat (3) and is screwed into the anti-cone steel sleeve.

2. A steel nipple connection structure for aluminum alloy special equipment according to claim 1, characterized in that: The anti-cone steel sleeve is screwed into the aluminum alloy auxiliary seat (3) by a non-impact electric or pneumatic wrench.

3. A steel cup connection structure for aluminum alloy special equipment according to claim 1, characterized in that: The internal threads of the aluminum alloy auxiliary seat (3) are processed by a head tapping tap.

Images