Bolt for sealing tank body with injection-molded head

By designing bolts for injection-molded sealed tanks for heads and using conical spines to embed the inner wall of the round hole and the injection-molded plastic sleeve, the problems of existing bolts are solved, and more convenient installation and higher sealing performance are achieved.

CN222633615UActive Publication Date: 2025-03-18JIAXING HANQI AUTO PARTS TECH CO LTD
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Patent Information

Application Number
CN202421537617.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-01
Publication Date
2025-03-18
Estimated Expiration
2034-07-01

AI Technical Summary

Technical Problem

When existing bolts are used on sealed tanks, square holes need to be opened on the connected parts, resulting in troublesome installation and poor versatility.

Method used

A bolt for injection-molded sealing can body of the head is designed, including a bolt head, a bar, a threaded rod, a plastic sleeve, an inner core and a conical thorn. The conical thorn can be embedded in the inner wall of the round hole to avoid the bolts rotating, and sealing is achieved through the injection-molded plastic sleeve.

Benefits of technology

There is no need to open square holes on the connected parts, the bolt installation is more convenient, the versatility is improved, and good sealing performance is achieved through the plastic sleeve.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222633615U_ABST
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Abstract

The utility model discloses a head injection molding type bolt for a sealed tank body, which comprises a bolt head, a polish rod, a threaded rod, a plastic sleeve, an inner core and a conical thorn, the bottom of the bolt head is connected with the polish rod, the bottom of the polish rod is connected with the threaded rod, the bolt head, the polish rod and the threaded rod are positioned on the same vertical central axis, the bolt head consists of the inner core and the plastic sleeve, and the conical thorn is arranged on the inner core. A plastic sleeve is arranged outside the inner core in an injection molding mode, the inner core is not covered by the plastic sleeve only in the center area of the bottom end of the bolt head, the polish rod is fixed to the area, not covered by the plastic sleeve, of the inner core, and a plurality of conical thorns are fixed to the top end of the outer wall of the polish rod and are in a triangular pyramid shape. The conical thorn is arranged at the top end of the outer wall of the polish rod, so that the conical thorn can pierce the inner wall of the top end of a round hole of a connected part when the bolt is installed, the bolt cannot rotate when a nut is screwed, a square hole does not need to be formed, the bolt is convenient to install, and universality is high.
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Description

[Technical field]

[0001] The utility model relates to the technical field of fasteners, in particular to the technical field of bolts. [Background technology]

[0002] Some bolts and nuts are used to connect the parts together on sealed tanks such as biogas tanks. Due to the special nature of sealed tanks, it is necessary to ensure that the joints have good sealing. In order to prevent the bolts from rotating when the nuts are tightened, a square section is generally set near the head of the bolts, which requires square holes to be opened on the connected parts. It is more troublesome to open square holes, and such bolts have poor versatility. [Contents of the utility model]

[0003] The utility model aims to solve the problems in the prior art and provides a head injection-molded sealed tank bolt, which can make it unnecessary to open a square hole on the connected parts when the bolt is in use, and the bolt has high versatility.

[0004] To achieve the above-mentioned purpose, the utility model proposes a head injection-molded sealed tank body bolt, comprising a bolt head, a polished rod, a threaded rod, a plastic sleeve, an inner core, and a conical thorn. The bottom of the bolt head is connected to the polished rod, the bottom of the polished rod is connected to the threaded rod, the bolt head, the polished rod, and the threaded rod are located on the same vertical central axis, the bolt head consists of an inner core and a plastic sleeve, a plastic sleeve is injection-molded on the outside of the inner core, the inner core is not covered by the plastic sleeve only in the central area of ​​the bottom end of the bolt head, the polished rod is fixed to the area of ​​the inner core that is not covered by the plastic sleeve, a plurality of conical thorns are fixed to the top end of the outer wall of the polished rod, the conical thorns are in the shape of a triangular cone, and two of the faces of the conical thorns are respectively a part of the outer wall of the polished rod and a part of the bottom wall of the inner core.

[0005] Preferably, the inner core, the polished rod and the threaded rod are an integrated structure.

[0006] Preferably, the bolt head is in a spherical crown shape.

[0007] Preferably, the bottom end of the plastic sleeve is lower than the bottom end of the inner core.

[0008] Preferably, the inner core consists of a main body and a connecting part, the connecting part is fixed at the bottom center of the main body, the cross-section of the bottom end of the main body is larger than the cross-section of the top end of the connecting part, and the bottom end surface of the connecting part is the area of ​​the inner core not covered by the plastic sleeve.

[0009] The beneficial effects of the utility model are as follows: the utility model arranges the conical thorn at the top end of the outer wall of the bare rod, so that when the bolt is installed, the conical thorn can pierce the inner wall of the top end of the circular hole of the connected component, so that the bolt will not rotate when the nut is tightened, and there is no need to open a square hole. The bolt is convenient to install and has high versatility. The external injection-molded plastic sleeve of the inner core not only makes the bolt head less susceptible to corrosion, but also the plastic sleeve can play the role of a sealing gasket. When the bolt is installed, the bolt head does not need to use a sealing gasket and can have good sealing performance.

[0010] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0011] Figure 1 This is a front view of a bolt for a head injection-molded sealed tank body of the utility model;

[0012] Figure 2 The utility model is a bottom view of a bolt for a head injection-molded sealed tank body.

[0013] In the figure: 1-bolt head, 2-plain rod, 3-threaded rod, 11-inner core, 12-plastic sleeve, 13-main body, 14-connecting part, 20-conical thorn. [Specific implementation method]

[0014] See also Figure 1 , Figure 2 The utility model discloses a bolt for sealing a tank body with injection molding of the head, comprising a bolt head 1, a polished rod 2, a threaded rod 3, a plastic sleeve 12, an inner core 11, and a conical thorn 20. The bottom of the bolt head 1 is connected to the polished rod 2, and the bottom of the polished rod 2 is connected to the threaded rod 3. The bolt head 1, the polished rod 2, and the threaded rod 3 are located on the same vertical central axis. The bolt head 1 is composed of an inner core 11 and a plastic sleeve 12. A plastic sleeve 12 is injection molded on the outside of the inner core 11. The inner core 11 is not covered by the plastic sleeve 12 only in the central area of ​​the bottom end of the bolt head 1. The polished rod 2 is fixed to the area of ​​the inner core 11 that is not covered by the plastic sleeve 12. A plurality of conical thorns 20 are fixed to the top of the outer wall of the polished rod 2. The conical thorns 20 are in the shape of a triangular pyramid, and two of the faces of the conical thorns 20 are respectively a part of the outer wall of the polished rod 2 and a part of the bottom wall of the inner core 11.

[0015] The inner core 11, the polished rod 2 and the threaded rod 3 are an integrated structure.

[0016] The bolt head 1 is in a spherical crown shape.

[0017] In order to ensure that the plastic sleeve 12 can fully contact the connected object and achieve a good sealing effect, the bottom end of the plastic sleeve 12 is lower than the bottom end of the inner core 11 .

[0018] The inner core 11 is composed of a main body 13 and a connecting part 14. The connecting part 14 is fixed at the bottom center of the main body 13. The cross section of the bottom of the main body 13 is larger than the cross section of the top of the connecting part 14. The bottom end surface of the connecting part 14 is the area of ​​the inner core 11 not covered by the plastic sleeve 12.

[0019] Working process of this utility model:

[0020] During the working process of the bolt for head injection-molded sealed tank body of the utility model, the bare rod 2 and the threaded rod 3 of the bolt are passed through the mounting hole, the bolt head 1 is knocked with a tool so that the conical thorn 20 is partially embedded in the inner wall of the mounting hole, and then a nut is screwed on the threaded rod 3. Since the conical thorn 20 is partially embedded in the inner wall of the mounting hole, the bolt will not rotate when the nut is screwed. As the nut is continuously tightened, the bolt head 1 will fully contact the surface of the connected object. In this process, the conical thorn 20 will further extend into the mounting hole. In the process of deepening, the conical thorn 20 will be further embedded in the inner wall of the mounting hole, so that the bolt will not slip due to the increase of torque when the nut is tightened.

[0021] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. Bolts for sealing tank bodies with injection-molded heads, characterized in that: The invention comprises a bolt head (1), a polished rod (2), a threaded rod (3), a plastic sleeve (12), an inner core (11), and a conical thorn (20). The bottom of the bolt head (1) is connected to the polished rod (2), the bottom of the polished rod (2) is connected to the threaded rod (3), the bolt head (1), the polished rod (2), and the threaded rod (3) are located on the same vertical central axis, the bolt head (1) is composed of an inner core (11) and a plastic sleeve (12), the outer part of the inner core (11) is injection molded with a plastic The inner core (11) is not covered by the plastic sleeve (12) only in the central area of ​​the bottom end of the bolt head (1), and the bare rod (2) is fixed to the area of ​​the inner core (11) not covered by the plastic sleeve (12). A plurality of conical thorns (20) are fixed to the top of the outer wall of the bare rod (2), and the conical thorns (20) are in the shape of a triangular pyramid, and two surfaces of the conical thorns (20) are respectively a part of the outer wall of the bare rod (2) and a part of the bottom wall of the inner core (11).

2. The head injection-molded sealed tank bolt according to claim 1, characterized in that: The inner core (11), the polished rod (2) and the threaded rod (3) are an integrated structure.

3. The head injection-molded sealed tank bolt according to claim 1, characterized in that: The bolt head (1) is in the shape of a spherical crown.

4. The head injection-molded sealed tank bolt according to claim 1, characterized in that: The bottom end of the plastic sleeve (12) is lower than the bottom end of the inner core (11).

5. The head injection-molded sealed tank bolt according to claim 1, characterized in that: The inner core (11) is composed of a main body (13) and a connecting part (14). The connecting part (14) is fixed at the center of the bottom end of the main body (13). The cross section of the bottom end of the main body (13) is larger than the cross section of the top end of the connecting part (14). The bottom end surface of the connecting part (14) is the area of ​​the inner core (11) that is not covered by the plastic sleeve (12).