Bushing bolt

Abstract

The utility model relates to the technical field of fasteners, in particular to a bushing bolt which comprises an installation portion and a thread portion, the thread portion is fixed below the installation portion, the installation portion comprises a bolt rod, a bolt head is arranged on the top of the bolt rod, and a bushing is sleeved on the bolt rod. The threaded part comprises a threaded rod and an inner hexagonal hole, the threaded rod is fixed to the bottom of the bolt rod, and the inner hexagonal hole is vertically and upwards formed in the bottom of the threaded rod. The bushing bolt has the advantages of being simple in structure, convenient to store and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener technical field, especially a bush bolt. BACKGROUND

[0002] With the development of aerospace technology, the airplane has important position in traffic and national defense safety, especially the key parts such as engine of airplane need to be matched with a kind of bush bolt assembly that can guarantee that bolt and bush cooperate closely and install quickly, high strength, long service life, convenient to save. CONTENT OF UTILITY MODEL

[0003] The utility model discloses a bush bolt, which has the advantages of simple structure, convenient storage and the like.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A bush bolt, comprising a mounting portion and a threaded portion, the threaded portion is fixed below the mounting portion, the mounting portion comprises a bolt shaft, a bolt head is arranged at the top of the bolt shaft, and a bushing is sleeved on the bolt shaft.

[0006] The threaded portion comprises a threaded rod and an internal hexagonal hole, the threaded rod is fixed at the bottom of the bolt shaft, and the internal hexagonal hole is vertically upwardly arranged at the bottom of the threaded rod.

[0007] As an improvement, the bushing comprises a first sleeve, a second sleeve is arranged at the top of the first sleeve, the first sleeve is in contact with the bolt shaft, and the inner wall diameter of the first sleeve gradually decreases from top to bottom.

[0008] As an improvement, the second sleeve is in the shape of a funnel, and the connection between the first sleeve and the second sleeve, the connection between the bolt head and the bolt shaft and the bottom of the bolt shaft are all provided with rounded corners.

[0009] As an improvement, a protective sleeve is sleeved on the threaded rod.

[0010] As an improvement, the protective sleeve comprises a fixing sleeve and an air bag, the fixing sleeve is sleeved on the threaded rod, the air bag is fixed below the fixing sleeve, and a thin handle is arranged below the air bag.

[0011] In summary, the utility model has the following beneficial effects:

[0012] 1. The bush bolt is composed of a mounting portion and a threaded portion, and has a simple structure.

[0013] 2. A protective sleeve is sleeved on the threaded rod, an air bag is arranged below the protective sleeve, the air bag can play a certain buffering role during transportation, and the integrity of the threaded rod before use is ensured.

[0014] 3. The connection between the first sleeve and the second sleeve, the connection between the bolt head and the bolt rod, and the bottom of the bolt rod are all rounded, which can reduce stress concentration and increase fatigue strength, thereby ensuring safe use of the product. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows.

[0016] Figure 1 It is a schematic diagram of the overall structure of a bushing bolt;

[0017] Figure 2 It is a schematic diagram of the structure of the mounting portion and the threaded portion;

[0018] Figure 3 It is a schematic diagram of the structure of the bushing;

[0019] Figure 4 It is a schematic diagram of the structure of the protective sleeve;

[0020] Figure 5 It is a schematic diagram of the installation of the bushing bolt;

[0021] Wherein: 1, mounting portion; 11, bolt rod; 12, bolt head; 2, threaded portion; 21, threaded rod; 22, internal hexagonal hole; 3, bushing; 31, first sleeve; 32, second sleeve; 4, protective sleeve; 41, fixing sleeve; 42, air bag; 43, thin handle; 5, fixing plate; 6, mounting hole. DETAILED DESCRIPTION

[0022] The present application will be described in further detail below with reference to the drawings.

[0023] Please refer to Figures 1-2 A bushing bolt, comprising a mounting portion 1 and a threaded portion 2, the threaded portion 2 being fixed below the mounting portion 1, the mounting portion 1 comprising a bolt rod 11, a bolt head 12 being provided at the top of the bolt rod 11, and a bushing 3 being sleeved on the bolt rod 11.

[0024] The threaded portion 2 comprises a threaded rod 21 and an internal hexagonal hole 22, the threaded rod 21 being fixed at the bottom of the bolt rod 11, and the internal hexagonal hole 22 being vertically upwardly provided at the bottom of the threaded rod 21.

[0025] In this embodiment, the bushing 3 bolt is composed of the mounting portion 1 and the threaded portion 2, and the structure is simple.

[0026] Please refer to Figure 3The bushing 3 comprises a first sleeve 31, and a second sleeve 32 is arranged on the top of the first sleeve 31, and the first sleeve 31 is in contact with the bolt rod 11. The inner wall of the first sleeve 31 is gradually reduced from top to bottom, the second sleeve 32 is funnel-shaped, and the connection between the first sleeve 31 and the second sleeve 32, the connection between the bolt head 12 and the bolt rod 11 and the bottom of the bolt rod 11 are all arranged in a round corner. In the embodiment, the connection A between the first sleeve 31 and the second sleeve 32, the connection B between the bolt head 12 and the bolt rod 11 and the bottom C of the bolt rod 11 are all arranged in a round corner, which can reduce stress concentration and increase fatigue strength, thereby ensuring the safe use of the product.

[0027] Please refer to Figure 4 A protective sleeve 4 is arranged on the threaded rod 21. The protective sleeve 4 comprises a fixed sleeve 41 and an air bag 42. The fixed sleeve 41 is arranged on the threaded rod 21, the air bag 42 is fixed below the fixed sleeve 41, and a thin handle 43 is arranged below the air bag 42. In the embodiment, the protective sleeve 4 is arranged on the threaded rod 21, and the air bag 42 is arranged below the protective sleeve 4. The air bag 42 can play a certain buffering role during transportation, thereby ensuring the integrity of the threaded rod 21 before use.

[0028] In the embodiment, the air bag 42 is a tooth-shaped air bag 42, and the fixed sleeve 41 is a thin-walled fixed sleeve 41.

[0029] The mounting part 1 and the threaded part 2 of the product are made of TC4 titanium alloy material, the bushing 3 is made of 1Cr18Ni9Ti stainless steel material, both of which are processed by upsetting forming and cutting forming. The protective sleeve 4 is made of plastic by injection molding. The above material selection and forming method can not only ensure the performance requirements of the bushing 3 bolt, but also greatly reduce the processing flow and the consumption of raw materials, reduce the processing cost and improve the processing efficiency.

[0030] Please refer to Figure 5 Before installation, the bolt head 12 is not in contact with the first sleeve 31, and the bolt rod 11 is naturally based on the second sleeve 32. At this time, the bolt can be kept from falling off but loose. During installation, the bushing 3 bolt is placed in the mounting hole 6 of the fixed plate 5, then pressure is applied to the bolt head 12 downward, so that the bolt head 12 is completely attached to the first sleeve 31. At the same time, the whole bushing 3 is subjected to the force applied by the bolt rod 11, and begins to expand freely until the installation is completed. After installation is completed, the mounting part 1 and the bushing 3 are tightly attached to each other and form an interference fit with the mounting hole 6 of the fixed plate 5. Then, the thin handle 43 is pinched by hand, and the protective sleeve 4 is taken out downward, so that the thread is further matched with other internal thread parts for use.

[0031] It should be noted that the above examples are used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones without departing from the spirit of the technical solutions of the present application, and all of them should be covered in the technical solution range of the present application claimed.

Claims

1. A bushing bolt characterized by, The mounting part comprises a bolt rod, a bolt head is arranged on the top of the bolt rod, and a bushing is sleeved on the bolt rod; The threaded part comprises a threaded rod and an inner hexagonal hole, the threaded rod is fixed on the bottom of the bolt rod, and the inner hexagonal hole is vertically upwardly arranged on the bottom of the threaded rod.

2. The bushed bolt of claim 1, wherein, The bushing comprises a first sleeve, a second sleeve is arranged on the top of the first sleeve, the first sleeve is in contact with the bolt rod, and the inner wall diameter of the first sleeve gradually decreases from top to bottom.

3. The bushed bolt of claim 2, wherein, The second sleeve is funnel-shaped, and the connecting part of the first sleeve and the second sleeve, the connecting part of the bolt head and the bolt rod and the bottom of the bolt rod are all roundly arranged.

4. The bushed bolt of claim 1, wherein, A protective sleeve is sleeved on the threaded rod.

5. The bushed bolt of claim 4, wherein, The protective sleeve comprises a fixing sleeve and an air bag, the fixing sleeve is sleeved on the threaded rod, the air bag is fixed below the fixing sleeve, and a thin handle is arranged below the air bag.

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