Pliers for vertically pressing pin shaft

Abstract

The utility model aims to solve the problem of difficulty in assembly of press-fitting pin shaft parts when an assembly space is narrow and small, and provides the pliers for vertically press-fitting the pin shaft. Sufficient pressure in the vertical direction is applied to the pin shaft through the jaws extending into the assembly space, the assembly difficulty of the pin shaft is reduced, the two sliding rods are always kept parallel, the rotating motion of the jaws is effectively converted into translational motion, it is guaranteed that the two jaws are always in a parallel state in the opening and closing process, and the assembly efficiency of the pin shaft is improved. The perpendicularity of vertical press fitting of the pin shaft is achieved; the press-fitting device is simple in structure, convenient to operate, flexible to use, convenient to carry, high in universality and low in manufacturing cost, press-fitting operation in a space with narrow installation height and short horizontal stretching amount is achieved, the force application space is increased, the assembly quality is guaranteed, and the assembly efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft assembly, in particular to a pair of pliers used for vertically pressing a pin shaft. Background Art

[0002] In the field of aircraft assembly technology, various aircraft components have various shapes and specifications due to their different functions and stress conditions. During the overall assembly of the aircraft, when press-fitting pin-type parts in narrow locations such as fuselage bulkheads, the assembly space is small, the assembly angle is restricted, the force application space is small, and manual assembly is difficult.

[0003] like Figure 3 , Figure 8 As shown, a certain type of aircraft support has a fork-shaped part composed of multiple groups of fork-shaped structures 8 arranged side by side, and each fork-shaped structure 8 is provided with a bracket assembly hole, and a pin shaft 9 needs to be vertically pressed into the bracket assembly hole for fixing the parts. In the existing assembly process, the pin shaft 9 is pressed by a hand press; but due to the narrow installation height and short horizontal extension of the fork-shaped structures 8 arranged side by side on the support, the assembly space is limited, resulting in the inability to apply sufficient axial force to the pin shaft 9, and thus the pin shaft 9 cannot be vertically interference-fitted with the bracket assembly hole of the fork-shaped structure 8, and the incorrect force application direction is easy to damage the bracket assembly hole, and multiple adjustments are required during the assembly process, affecting the assembly quality and assembly speed; if pliers are used to clamp the side wall of the tail of the pin shaft horizontally and force is applied to the pin shaft 9, there is a risk of damaging the pin shaft 9 and the wall of the bracket assembly hole. Utility Model Content

[0004] The utility model aims to solve the problem of difficulty in assembling press-fit pin shaft parts when the assembly space is narrow, and provides a pair of pliers for vertically press-fitting pin shafts.

[0005] To achieve the above purpose, the technical solution provided by the utility model is:

[0006] A pair of pliers for vertically pressing pins, the special features of which are:

[0007] It includes a handle assembly, a slide bar assembly and a jaw assembly;

[0008] The handle assembly is X-shaped, and includes two mirror-symmetrical and mutually hinged support handles, with the hinge axis as the dividing point, the support handle is divided into a clamping section and a holding section; the clamping section and the holding section are each provided with a connecting axis;

[0009] The slide bar assembly comprises two identical slide bars; the two ends of the slide bar are respectively an operating end and a moving end; the operating end is provided with an axial hole, and the moving end is provided with a strip through hole along the length direction, and the opening directions of the axial hole and the strip through hole are the same; the operating end of the slide bar is hinged to the connecting shaft of one support handle clamping section, and the connecting shaft of the other support handle gripping section slides in the strip through hole;

[0010] The jaw assembly comprises an upper jaw and a lower jaw;

[0011] The upper jaw and the lower jaw are respectively fixed to the operating ends of the two sliding rods;

[0012] The upper jaw is provided with a circular groove which is in clearance with the head of the pin shaft; the lower jaw is provided with an assembly hole which is in clearance with the tail of the pin shaft.

[0013] Further,

[0014] The upper jaw and the lower jaw are respectively formed integrally with the two sliding rods.

[0015] Further,

[0016] The handle assembly comprises a first handle and a second handle; the cross sections of the two handles are mirror-symmetrical; the ends of the clamping sections of the two handles are each provided with a linear opening with the same width and depth, and the depth of the opening is greater than or equal to the distance from the end of the clamping section to the connecting axis of the gripping section;

[0017] The width of the middle section of the opening of the first handle is relatively large, and its width is equal to the thickness of the second handle. The second handle is inserted into the middle section of the opening of the first handle, and the two handles are hinged via a hinge shaft.

[0018] Further,

[0019] The gripping sections of the two handles are shaped as curved surfaces suitable for gripping, and the surfaces of the gripping sections are provided with textures for increasing friction.

[0020] Further,

[0021] The connecting shafts of the two support handles are both arranged on the same side of the two support handles.

[0022] Further,

[0023] The lengths of the upper jaw and the lower jaw match the horizontal extension required for assembly.

[0024] Further,

[0025] The hinge shaft is provided with a threaded hole, and the hinge shaft passes through two support handles and is fixed by screws.

[0026] Further,

[0027] The minimum distance from the strip-shaped through hole to the hinge axis of the support handle is equal to the distance from the shaft hole to the hinge axis of the support handle.

[0028] Further,

[0029] The strength requirement of the pliers after quenching is HRC45-50.

[0030] The advantages of the utility model are:

[0031] 1. The utility model has the advantages of simple structure, convenient operation, flexible use, portability, strong versatility and low production cost, and realizes the press-fitting operation in a space with a narrow installation height and a short horizontal extension, thereby increasing the force application space, ensuring the assembly quality and improving the assembly efficiency.

[0032] 2. The utility model applies sufficient vertical pressure to the pin shaft by means of the jaws extending into the assembly space, thereby reducing the difficulty of assembling the pin shaft.

[0033] 3. The two slide bars of the utility model always remain parallel, effectively converting the rotational motion of the jaws into translational motion, ensuring that the two jaws are always in a parallel state during the opening and closing process, so as to achieve the verticality of the vertical press-fitting of the pin shaft and ensure the assembly quality.

[0034] 4. The utility model has a smaller requirement for assembly space, avoids interference with other structures, and is suitable for similar assembly designs.

[0035] 5. For pins and assembly holes of different sizes, the utility model can be used for vertical press-fitting by replacing jaw components of different sizes, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 : Front view of the small opening of the pliers;

[0037] Figure 2 : Front view of the large opening of the pliers;

[0038] Figure 3 : Schematic diagram of the assembly of the pliers vertically pressing the pin on the fork structure;

[0039] Figure 4 : Front view of the upper jaw and slide bar

[0040] Figure 5 : Top view of the upper jaw and the slide bar;

[0041] Figure 6 : Cross-sectional view of the lower jaw and the slide bar

[0042] Figure 7 : Top view of the lower jaw and the slide bar;

[0043] Figure 8: Schematic diagram of the structure of the articulated shaft;

[0044] Fig. 9 : Schematic diagram of the structure of the screw;

[0045] Fig.10 : Schematic diagram of the first handle structure;

[0046] Fig.11 : Schematic diagram of the second handle structure;

[0047] In the figure: 1-upper jaw; 2-hinge shaft; 3-first handle; 4-second handle; 5-connecting shaft; 6-lower jaw; 7-slide rod; 8-fork structure; 9-pin shaft; 10-screw. DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0049] like Figure 1 , Figure 2 A pair of pliers for vertically pressing a pin shaft as shown includes a handle assembly, a slide bar assembly and a jaw assembly;

[0050] like Fig.10 , Fig.11 As shown, the handle assembly is X-shaped, including two mirror-symmetrical and mutually hinged handles; the handles are divided into a clamping section and a holding section with the hinge axis 2 as the dividing point; the clamping section and the holding section are each provided with a connecting axis 5; in this embodiment, the connecting axes 5 of the two handles are both arranged on the same side of the two handles.

[0051] like Figure 1 , Figure 2 , Figure 8 , Fig. 9 As shown, the hinge shaft 2 of this embodiment is provided with a threaded hole, and the hinge shaft 2 passes through the two handles and is fixed by screws 10 to limit the two handles. The handle assembly of this embodiment includes a first handle 3 and a second handle 4; the cross-sections of the two handles are mirror-symmetrical; the ends of the clamping sections of the two handles are provided with a linear opening with the same width and depth, and the depth of the opening is greater than or equal to the distance from the end of the clamping section to the connecting axis 5 of the gripping section;

[0052] Preferably, the width of the middle section of the opening of the first handle 3 is larger, and its width is equal to the thickness of the second handle 4 . The second handle 4 is inserted into the middle section of the opening of the first handle 3 , and the two handles are hinged by the hinge shaft 2 .

[0053] Preferably, the gripping sections of the two handles are shaped as curved surfaces suitable for gripping, and the surfaces of the gripping sections are provided with textures for increasing friction.

[0054] like Figure 3 to Figure 7 As shown, the slide bar assembly includes two identical slide bars 7; the two ends of the slide bar 7 are respectively an operating end and a moving end; the operating end is provided with an axial hole, and the moving end is provided with a strip through hole along the length direction, and the opening directions of the axial hole and the strip through hole are the same; the operating end of the slide bar 7 is hinged to the connecting shaft 5 of one handle clamping section, and the connecting shaft 5 of the other handle gripping section slides in the strip through hole, ensuring that the two slide bars 7 are always parallel, and further ensuring that the upper jaw 1 and the lower jaw 6 are always parallel;

[0055] Preferably, the minimum distance from the strip-shaped through hole to the hinge of the handle is equal to the distance from the axial hole to the hinge of the handle.

[0056] The jaw assembly includes an upper jaw 1 and a lower jaw 6; the upper jaw 1 and the lower jaw 6 are respectively located at the operating ends of two slide bars 7; Figure 3 to Figure 7 As shown, in this embodiment, the upper jaw 1 and the lower jaw 6 are respectively formed integrally with two slide bars 7;

[0057] The lengths of the upper jaw 1 and the lower jaw 6 match the horizontal extension required for assembly; the upper jaw 1 is provided with a circular groove that matches the clearance of the pin head, and the aperture of the circular groove is slightly larger than the diameter of the pin head; the lower jaw 6 is provided with an assembly hole that matches the clearance of the pin tail. By pressing the two support handles, the pin 9 is vertically pressed into the bracket assembly hole to avoid interference with the remaining fork-shaped structures 8.

[0058] Preferably, the pin head is provided with a chamfer to facilitate automatic alignment of the pin 9 when it is pressed into the circular groove.

[0059] For pin shafts 9 and assembly holes of different sizes, different jaw components can be replaced for vertical press-fitting, which has a wide range of applications.

[0060] To ensure the strength of the pliers, the material of the pliers in this embodiment is T8A steel, and the strength requirement after quenching is HRC45-50.

[0061] Assembly method of vertical press-fit pin shaft using the utility model:

[0062] 1. Place the pin 9 above the bracket assembly hole, expand the two handles, and ensure that the opening of the pliers is larger than the length of the pin 9; at the same time, extend the upper jaw 1 and the lower jaw 6 of the pliers horizontally from both ends of the bracket assembly hole of the fork-shaped structure 8, match the clearance of the upper jaw 1 with the pin head, and align the assembly hole of the lower jaw 6 with the bracket assembly hole;

[0063] 2. Press the two handles at the same time to install the pin 9 into the bracket assembly hole;

[0064] 3. Slowly expand the two handles, and at the same time separate the upper jaw 1 from the pin head and the lower jaw 6 from the pin tail;

[0065] 4. Withdraw the pliers from both ends of the bracket assembly hole to complete the assembly of the vertical press-fit pin 9.

[0066] Note:

[0067] Before the pliers are separated from the pin 9, the upper jaw 1 and the lower jaw 6 must always be kept level with the fork structure 8 to prevent damage to the pin 9 and the wall of the bracket assembly hole.

[0068] The above description is only a specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present utility model, and these modifications or substitutions should be included in the protection scope of the present utility model.

Claims

1. A pliers for vertically pressing a pin, characterized in that: It includes a handle assembly, a slide bar assembly and a jaw assembly; The handle assembly is X-shaped, and includes two mirror-symmetrical and mutually hinged support handles, with the hinge axis as the dividing point, the support handle is divided into a clamping section and a holding section; the clamping section and the holding section are each provided with a connecting axis; The slide bar assembly comprises two identical slide bars; the two ends of the slide bar are respectively an operating end and a moving end; the operating end is provided with an axial hole, and the moving end is provided with a strip through hole along the length direction, and the opening directions of the axial hole and the strip through hole are the same; the operating end of the slide bar is hinged to the connecting shaft of one support handle clamping section, and the connecting shaft of the other support handle gripping section slides in the strip through hole; The jaw assembly comprises an upper jaw and a lower jaw; The upper jaw and the lower jaw are respectively fixed to the operating ends of the two sliding rods; The upper jaw is provided with a circular groove which is in clearance with the head of the pin shaft; the lower jaw is provided with an assembly hole which is in clearance with the tail of the pin shaft.

2. A pliers for vertically pressing a pin according to claim 1, characterized in that: The upper jaw and the lower jaw are respectively formed integrally with the two sliding rods.

3. A pliers for vertically pressing a pin according to claim 1, characterized in that: The handle assembly comprises a first handle and a second handle; the cross sections of the two handles are mirror-symmetrical; the ends of the clamping sections of the two handles are each provided with a linear opening with the same width and depth, and the depth of the opening is greater than or equal to the distance from the end of the clamping section to the connecting axis of the gripping section; The width of the middle section of the opening of the first handle is relatively large, and its width is equal to the thickness of the second handle. The second handle is inserted into the middle section of the opening of the first handle, and the two handles are hinged via a hinge shaft.

4. A pliers for vertically pressing a pin according to claim 1 or 3, characterized in that: The gripping sections of the two handles are shaped as curved surfaces suitable for gripping, and the surfaces of the gripping sections are provided with textures for increasing friction.

5. A pliers for vertically pressing a pin according to claim 1 or 3, characterized in that: The connecting shafts of the two support handles are both arranged on the same side of the two support handles.

6. A pliers for vertically pressing a pin according to claim 1, characterized in that: The lengths of the upper jaw and the lower jaw match the horizontal extension required for assembly.

7. A pliers for vertically pressing a pin according to claim 1, characterized in that: The hinge shaft is provided with a threaded hole, and the hinge shaft passes through two support handles and is fixed by screws.

8. The pliers for vertically pressing a pin according to claim 1, characterized in that: The minimum distance from the strip-shaped through hole to the hinge axis of the support handle is equal to the distance from the shaft hole to the hinge axis of the support handle.

9. The pliers for vertically pressing a pin according to claim 1, characterized in that: The strength requirement of the pliers after quenching is HRC45-50.

Images