Self-adaptive bushing

Abstract

The utility model discloses a self-adaptive bushing, which relates to the technical field of bolt bushings, and comprises a first connected piece and a second connected piece, one end of the second connected piece is inserted in one end of the first connected piece, and a bushing assembly is inserted at the joint of the first connected piece and the second connected piece. A bolt is inserted into the lining assembly, a nut is installed at the bottom end of the bolt in a threaded mode, the lining assembly comprises two convex shoulder linings and an inner lining, the inner lining is located between the two convex shoulder linings, the upper end and the lower end of the inner lining are slidably clamped in the corresponding convex shoulder linings respectively, and installation holes are formed in the combined ends of the first connected piece and the second connected piece. According to the utility model, the bolt and the mounting hole are in close fit through mutual extrusion among the parts, and the parts can be easily taken out without mutual extrusion after the nut is disassembled, so that not only is the matching requirement during use met, but also the disassembly is convenient, and meanwhile, clearance self-adaption and automatic adjustment are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt bushings, and particularly to an adaptive bushing. Background Technique

[0002] Bolts are commonly used standard connecting parts, which are divided into three force forms according to the loading conditions: tension, shear, and combined tension and shear. Shear bolts (such as HB-107) have high requirements for the accuracy (h6) and surface roughness (Ra0.8) of the bolt shank. 30CrMnSiA (medium carbon quenched and tempered steel) with high strength, wear resistance, good toughness, good fatigue resistance, and easy processing is mainly used. At the same time, in order to meet the anti-corrosion requirements, the bolt surface is commonly treated with cadmium plating and passivation. An interference fit is commonly used between the bolt and the connected part. The bolt is a steel part (ab = 1175 ± 100 MPa), and the connected part is an aluminum part (ob ≤ 390 MPa). The material strengths of the two do not match. In order to protect the aluminum connected part, a steel / copper bushing needs to be installed in the hole of the connected part for protection (reduce wear caused by micro-movement and extend the service life, and avoid plastic deformation of the hole wall caused by extrusion).

[0003] For the installation and disassembly of the bushing and bolt in the inner field, a temperature difference assembly is adopted. Due to limited conditions, a forced assembly is generally adopted in the outer field, which easily leads to the bushing falling off and the connection failing during the disassembly and assembly process. The replacement of the special bushing requires reaming the hole, which is time-consuming and laborious. The existing bolt bushings cannot be adaptively adjusted according to the diameters of different installation holes. In view of the above problems, the inventor proposes an adaptive bushing to solve the above problems. Content of the Utility Model

[0004] In order to solve the problems that the existing bolt bushings cannot be adaptively adjusted according to the diameters of different installation holes and are not convenient for installation and disassembly; the purpose of the utility model is to provide an adaptive bushing.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: an adaptive bushing, including a first connected part and a second connected part. One end of the second connected part is inserted into one end of the first connected part. A bushing assembly is inserted at the joint of the first connected part and the second connected part. A bolt is inserted into the bushing assembly. A nut is threadedly installed at the bottom end of the bolt. The bushing assembly includes two shoulder bushings and an inner bushing. The inner bushing is located between the two shoulder bushings. The upper and lower ends of the inner bushing are respectively slidably clamped in the corresponding shoulder bushings.

[0006] Preferably, installation holes are opened at one ends where the first connected part and the second connected part are combined, and the bushing assembly is inserted into the installation holes.

[0007] Preferably, the two shoulder bushings and the inner bushing are each composed of two mirror-image bushing plates. The outer sides of the upper and lower ends of the inner bushing are both tapered. Between the two sides of the two bushing plates of the two shoulder bushings, two spring telescopic rods are fixedly installed and distributed up and down. On the inner sides of one ends of the two bushing plates of the two shoulder bushings, sliders are fixedly installed. On the outer sides of the two bushing plates of the inner bushing, chutes are provided, and the sliders are slidably clamped in the corresponding chutes.

[0008] Preferably, gaskets are sleeved at both ends of the bolt, and the gaskets are in contact with both ends of the bushing assembly. A split pin is inserted into the nut. An opening groove is provided at the bottom end of the bolt, and the split pin is inserted into the opening groove.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] In the present utility model, a tight fit is formed between the bolt and the mounting hole through mutual extrusion among the components. After the nut is disassembled, the components can be easily taken out without mutual extrusion, which not only meets the fitting requirements during use but also is convenient for disassembly, and at the same time has clearance self-adaptation and automatic adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0012] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 It is a schematic cross-sectional structure diagram of the connected part of the present utility model;

[0014] Figure 3 It is a schematic cross-sectional structure diagram of the bushing assembly of the present utility model;

[0015] Figure 4 It is the present utility model Figure 3 The enlarged schematic diagram of the structure at A in;

[0016] Figure 5 It is a schematic diagram of the split structure of the bolt and nut of the present utility model.

[0017] In the figure: 1. First connected part; 2. Second connected part; 3. Bolt; 31. Opening groove; 4. Nut; 5. Split pin; 6. Gasket; 7. Mounting hole; 8. Bushing assembly; 81. Shoulder bushing; 811. Slider; 82. Inner bushing; 821. Chute; 83. Spring telescopic rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] Embodiment: As Figures 1-5 shown, the present utility model provides an adaptive bushing, which includes a first connected part 1 and a second connected part 2. One end of the second connected part 2 is inserted into one end of the first connected part 1. A bushing assembly 8 is inserted at the joint of the first connected part 1 and the second connected part 2. A bolt 3 is inserted into the bushing assembly 8. A nut 4 is threadedly installed at the bottom end of the bolt 3. The bushing assembly 8 includes two shoulder bushings 81 and an inner bushing 82. The inner bushing 82 is located between the two shoulder bushings 81. The upper and lower ends of the inner bushing 82 are respectively slidably clamped in the corresponding shoulder bushings 81. The bushing assembly 8 is inserted at the joint of the first connected part 1 and the second connected part 2, and the two shoulder bushings 81 are higher than the plane of the connected part. Then, the bolt 3 is inserted into the bushing assembly 8, and the nut 4 is tightened for fixation. While tightening the nut 4, the shoulder bushing 81 is squeezed to retract into the connected part, and the shoulder bushing 81 squeezes the inner bushing 82, so that the inner bushing 82 squeezes and locks the bolt 3.

[0020] Installation holes 7 are respectively formed at one ends of the first connected part 1 and the second connected part 2 where they are combined, and the bushing assembly 8 is inserted into the installation holes 7.

[0021] By adopting the above technical solution, the bushing assembly 8 is inserted into the installation hole 7 at the joint of the first connected part 1 and the second connected part 2.

[0022] The two shoulder bushings 81 and the inner bushing 82 are both composed of two mirror-image bushing plates. The outer sides of the upper and lower ends of the inner bushing 82 are both tapered.

[0023] By adopting the above technical solution, it can be adaptively adjusted according to the aperture size of different installation holes 7. The tapered inner bushing 82 is convenient for the shoulder bushing 81 to squeeze it, so that the two bushing plates of the inner bushing 82 approach each other to squeeze and lock the bolt 3. The inner sides of the bushing plates of the shoulder bushings 81 and the inner bushing 82 are both arc-shaped.

[0024] Two spring telescopic rods 83 distributed up and down are fixedly installed between the two sides of the two lining plates of the two shoulder bushings 81.

[0025] By adopting the above technical solution, the spring telescopic rod 83 can support and rebound the two bushing plates of the shoulder bushing 81.

[0026] Sliders 811 are fixedly installed on the inner sides of one ends of the two bushing plates of the two shoulder bushings 81. Chute grooves 821 are formed on the outer sides of the two bushing plates of the inner bushing 82, and the sliders 811 are slidably clamped in the corresponding chute grooves 821.

[0027] By adopting the above technical solution, the shoulder bushing 81 slides along the chute grooves 821 on the inner bushing 82 through the sliders 811.

[0028] Gaskets 6 are sleeved on both ends of the bolt 3, and the gaskets 6 are in contact with both ends of the bushing assembly 8.

[0029] By adopting the above technical solution, the gaskets 6 can be used to protect both ends of the bushing assembly 8.

[0030] A split pin 5 is inserted into the nut 4. An opening groove 31 is formed at the bottom end of the bolt 3, and the split pin 5 is inserted into the opening groove 31.

[0031] By adopting the above technical solution, after the nut 4 is tightened, the split pin 5 is inserted so that the split pin 5 passes through the opening groove 31 on the bolt 3, which can prevent the nut 4 from loosening. The split pin 5 is made of a metal sheet. After being inserted, the tail end is bent to perform limiting.

[0032] Working principle: First, the first connected part 1 and the second connected part 2 are butted. Then, the bushing assembly 8 is inserted into the installation hole 7 at the joint of the first connected part 1 and the second connected part 2. Then, the bolt 3 is inserted into the bushing assembly 8 and the nut 4 is tightened for fixation. While tightening the nut 4, the shoulder bushing 81 is squeezed and retracted into the connected part. The shoulder bushing 81 squeezes the inner bushing 82, causing the two bushing plates of the inner bushing 82 to approach each other and squeeze and lock the bolt 3. After the nut 4 is tightened, the split pin 5 is inserted so that the split pin 5 passes through the opening groove 31 on the bolt 3, which can prevent the nut 4 from loosening.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. An adaptive bushing, comprising a first connected member (1) and a second connected member (2), characterized in that: One end of the second connected part (2) is inserted into one end of the first connected part (1). A bushing assembly (8) is inserted at the joint of the first connected part (1) and the second connected part (2). A bolt (3) is inserted into the bushing assembly (8). A nut (4) is threadedly installed at the bottom end of the bolt (3). The bushing assembly (8) includes two shoulder bushings (81) and an inner bushing (82). The inner bushing (82) is located between the two shoulder bushings (81). The upper and lower ends of the inner bushing (82) are respectively slidably clamped in the corresponding shoulder bushings (81).

2. An adaptive bushing as claimed in claim 1, characterized in that, Mounting holes (7) are formed at one ends of the first connected part (1) and the second connected part (2) where they are combined, and the bushing assembly (8) is inserted into the mounting holes (7).

3. The adaptive bushing according to claim 1, wherein The two shoulder bushings (81) and the inner bushing (82) are each composed of two bushing plates that are mirror-distributed. The outer sides of the upper and lower ends of the inner bushing (82) are both tapered.

4. An adaptive bushing as claimed in claim 1, wherein, Two vertically-distributed spring telescopic rods (83) are fixedly installed between the two sides of the two bushing plates of the two shoulder bushings (81).

5. An adaptive bushing according to claim 1, characterized in that, Sliders (811) are fixedly installed on the inner sides of one ends of the two bushing plates of the two shoulder bushings (81). Slide grooves (821) are formed on the outer sides of the two bushing plates of the inner bushing (82), and the sliders (811) are slidably clamped in the corresponding slide grooves (821).

6. The self - adaptive bushing according to claim 1, wherein, Gaskets (6) are sleeved at both ends of the bolt (3), and the gaskets (6) are in contact with both ends of the bushing assembly (8).

7. An adaptive bushing according to claim 1, wherein, A split pin (5) is inserted into the nut (4). An opening groove (31) is formed at the bottom end of the bolt (3), and the split pin (5) is inserted into the opening groove (31).

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