Multipurpose necking device

Abstract

The utility model belongs to the technical field of fasteners, and relates to a multipurpose necking device. A necking pressure head device of the device comprises a necking mechanism, the necking mechanism is divided into a plurality of necking petals in the axial direction, a pressure head mechanism is arranged on the outer side of the upper end of each necking petal, and the first side face of each pressure head mechanism inclines inwards; the inner taper sleeve comprises a taper sleeve body, the second side face of the taper sleeve body inclines outwards, the first side face is matched with the second side face, the hydraulic mechanism pushes the inner taper sleeve body to move upwards to drive the necking-down petals to get close to the interior, an elastic device is arranged between the necking-down mechanism and the inner taper sleeve body, and resetting of the inner taper sleeve body is achieved through the elastic device. According to the device, the locking thread sleeve can be more effectively contracted and pressed inwards at the same time, so that the necking position is uniformly deformed, and the performance requirement of a product can be ensured while the structure of the locking thread sleeve is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fastener, and relates to a multi-purpose necking device. BACKGROUND

[0002] In the field of aviation and aerospace, the necking of the nut is usually two-point necking, three-point necking or four-point necking, and the necking of the locking sleeve needs to be multi-point necking on the external thread according to the number of slot on the necking end of the sleeve under the condition that the external thread is qualified, and the necking pressure mode has three-point, four-point, five-point, …, etc.

[0003] However, the conventional necking mode cannot be applied to the compression of the locking sleeve and the pipe joint, and if the conventional compression mode is used, the shape of the locking sleeve will be changed, the contact area with the pipe joint is not large enough, the pipe assembly compressed cannot meet the use requirements, and the internal thread of the locking sleeve may be damaged when necking. Moreover, the conventional necking equipment applies the necking force in the horizontal direction by the motor, but for large-sized products, on the one hand, the motor cannot apply enough force, and on the other hand, it cannot apply uniform multi-point torque to the multi-point necking. SUMMARY

[0004] The utility model aims at overcoming the above-mentioned prior art defects and providing a multi-purpose necking device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A multi-purpose necking device comprises a hydraulic mechanism, a hollow connecting shaft is connected to the hydraulic mechanism, a cavity is arranged in the hollow connecting shaft, a necking pressure head device is arranged in the cavity, an inner taper sleeve is arranged outside the hollow connecting shaft, and the inner taper sleeve is connected to the hydraulic mechanism.

[0007] The necking pressure head device comprises a necking mechanism, the necking mechanism is divided into a plurality of necking petals in the axial direction, a pressure head mechanism is arranged on the outer side of the upper end of each necking petal, the first side of the pressure head mechanism is inclined inward, the second side of a tapered sleeve of the inner taper sleeve is inclined outward, the first side and the second side are matched with each other, the inner taper sleeve is driven to move upward to drive the necking petals to move inward by the hydraulic mechanism, an elastic device is arranged between the necking mechanism and the inner taper sleeve, and the inner taper sleeve is reset by the elastic device.

[0008] Further, the necking pressure head device comprises a connecting pipe, and the necking mechanism is connected to the upper end of the connecting pipe.

[0009] Further, the bottom of the second side is provided with an inner recessed placement table, and the elastic device is located between the placement table and the pressure head mechanism.

[0010] Further, a positioning screw is arranged in the necking mechanism, and the bottom of the cavity is provided with a screw hole, and the positioning screw is screwed with the screw hole.

[0011] Further, the connecting end of the hollow connecting shaft is screwed with the connecting plate.

[0012] Further, the connecting end of the hollow connecting shaft is sleeved with a connecting sleeve.

[0013] Further, the inner taper sleeve comprises a fixing sleeve connected to the lower end of the taper sleeve, and the fixing sleeve is screwed to the hydraulic mechanism.

[0014] Further, the necking mechanism is provided with a screw thread.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The necking device of multiple purposes can effectively simultaneously inwardly compress the locking screw, make the necking position uniformly deform, guarantee the structure of the locking screw and also guarantee the performance requirement of the product.

[0017] 2. The necking power source of the necking device of multiple purposes abandons the conventional motor power system and adopts the hydraulic pressure which is more powerful and stable, converts the force in the vertical direction into the force in the horizontal direction through the combination of the second side of the inner taper sleeve and the first side of the necking mechanism, can be suitable for the compression of the locking screw, pipe joint and the like, has the characteristics of simple structure, widely applicable specification, easy to disassemble and assemble, beautiful necking effect and the like, and can be implemented with great effort. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings herein are incorporated into the description and form part of the description, which together with the description serves to explain the principles of the utility model.

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is a product cross-sectional view of the utility model;

[0021] Figure 2 It is a necking pressure head device cross-sectional view of the utility model;

[0022] Figure 3 It is the overhead view of the necking press head device of the utility model;

[0023] Figure 4 It is the section view schematic diagram of the hollow connecting shaft of the utility model;

[0024] Figure 5 It is the section view schematic diagram of the inner taper sleeve of the utility model;

[0025] Figure 6 It is the section view schematic diagram of the connecting sleeve of the utility model;

[0026] Figure 7 It is the overhead view of the connecting plate of the utility model;

[0027] Figure 8 It is the section view schematic diagram of the connecting plate of the utility model;

[0028] Figure 9 It is the positioning screw schematic diagram of the utility model.

[0029] Wherein: 1 is necking press head device;1-1 is necking mechanism;1-11 is necking petal;1-12 is press head mechanism;1-121 is first side face;1-2 is connecting pipe;2 is hollow connecting shaft;2-1 is cavity;2-2 is connecting end;3 is elastic device;4 is inner taper sleeve;4-1 is taper sleeve;4-11 is second side face;4-2 is fixed sleeve;4-3 is placing table;5 is connecting sleeve;6 is screw hole;7 is connecting plate;8 is hydraulic mechanism;9 is positioning screw. DETAILED DESCRIPTION

[0030] The example embodiments will be described in detail in this regard, the implementation described in the following example embodiments does not represent all the implementation consistent with the utility model. On the contrary, they are only examples consistent with some aspects of the utility model detailed in the appended claims.

[0031] In order to make those skilled in the art better understand the technical scheme of the utility model, the utility model will be described in further detail below in conjunction with the drawings and examples.

[0032] EXAMPLE

[0033] As Figure 1 As shown in a kind of multi-purpose necking device, including hydraulic mechanism 8, the hollow connecting shaft 2 is connected on the hydraulic mechanism 8, the cavity 2-1 is provided in the hollow connecting shaft 2, the necking press head device 1 is provided in the cavity 2-1, the outer sleeve of the hollow connecting shaft 2 is provided with inner taper sleeve 4, the inner taper sleeve 4 is connected with hydraulic mechanism 8;

[0034] The constriction pressing head device 1 includes a constriction mechanism 1-1, which is divided into multiple constriction petals 1-11 along the axial direction. Each constriction petal 1-11 has a pressing head mechanism 1-12 on its upper outer side. The first side 1-121 of the pressing head mechanism 1-12 is inclined inward. The inner conical sleeve 4 includes a conical sleeve 4-1, which has a second side 4-11 that is inclined outward. The first side 1-121 and the second side 4-11 cooperate with each other (with the same inclination angle). The hydraulic mechanism 8 pushes the inner conical sleeve 4 upward, causing the constriction petals 1-11 to move inward. An elastic device 3 is provided between the constriction mechanism 1-1 and the inner conical sleeve 4, and the inner conical sleeve 4 is reset through the elastic device 3.

[0035] In this embodiment: as Figure 4 As shown, the hollow connecting shaft 2 is placed at the center of the entire device. On the one hand, it is used to fix the constricting pressure head device 1, and on the other hand, it is used to connect the inner cone sleeve 4 to prevent the constricting pressure head device 1 and the inner cone sleeve 4 from slipping off. The specific specifications can be selected according to actual needs.

[0036] like Figures 2-3 As shown, the constriction pressure head device 1 is fixedly connected inside the hollow connecting shaft 2. The structure is a multi-lobed structure (i.e., constriction lobes 1-11). After being compressed and brought together, it forms a closed cylindrical elastic structure. The specific specifications can be selected according to actual needs.

[0037] like Figure 5 As shown, the second side 4-11 of the inner cone sleeve 4 has a taper that matches the first side 1-121 of the constriction head device. The downward movement of the cone sleeve causes the constriction head device 1 to move inward, which can be used for tightening screw sleeves, pipe fittings, etc.

[0038] Furthermore, the necking and pressing head device 1 includes a connecting pipe 1-2, and the necking mechanism 1-1 is equiaxially connected to the upper end of the connecting pipe 1-2.

[0039] In this embodiment: the connecting tube 1-2 can support the constriction mechanism 1-1, the connecting tube 1-2 is tightly attached to the inner wall of the hollow connecting shaft 2, and the connecting tube 1-2 can be screwed to the inner wall of the hollow connecting shaft 2.

[0040] Furthermore, a recessed placement platform 4-3 is provided at the bottom of the second side 4-11, and the elastic device 3 is located between the placement platform 4-3 and the pressure head mechanism 1-12.

[0041] In this embodiment, the elastic device 3 can be a spring. When the hydraulic mechanism 8 moves downward, the elastic device 3 can make the pressure head mechanism 1-12 move upward to achieve reset.

[0042] Furthermore, such as Figure 9As shown, the necking mechanism 1-1 is provided with a positioning screw 9, and the bottom of the cavity 2-1 is provided with a threaded hole, and the positioning screw 9 is screwed with the threaded hole.

[0043] In the embodiment, the positioning screw 9 is located in the center of the device, and the positioning screw 9 and the necking pressure head device 1 are connected by a common thread in the necking mechanism 1-1, and the height can be controlled by adjusting the screwing, and the height of the closed product can be adjusted, and the specific specifications can be selected according to the actual needs.

[0044] Further, as shown in the figure, Figures 7-8 The connecting end 2-2 of the hollow connecting shaft 2 is screwed with the connecting plate 7.

[0045] In the embodiment, a circle of threaded holes 6 is arranged on the connecting end 2-2 of the hollow connecting shaft 2, and a deeper threaded hole is arranged in the middle, so that the hollow connecting shaft 2 and the connecting plate 7 are more closely connected.

[0046] Further, as shown in the figure, Figure 6 The connecting end 2-2 of the hollow connecting shaft 2 is sleeved with a connecting sleeve 5.

[0047] Further, the inner taper sleeve 4 includes a fixed sleeve 4-2, the fixed sleeve 4-2 is connected to the lower end of the taper sleeve 4-1, and the fixed sleeve 4-2 is screwed to the hydraulic mechanism 8.

[0048] In the embodiment, the fixed sleeve 4-2 is screwed to the hydraulic mechanism 8 through the threaded hole 6.

[0049] Further, the necking mechanism 1-1 is provided with a thread.

[0050] The use method of the utility model: first, adjust the height of the positioning screw 9 in the necking mechanism 1-1, place the screw sleeve on the upper end of the positioning screw 9, screw the hollow connecting shaft 2 to the connecting plate 7, and screw the inner taper sleeve 4 to the hydraulic mechanism 8, then start the hydraulic mechanism, the hydraulic mechanism pushes the inner taper sleeve 4 upwards (the hollow connecting shaft 2 remains stationary), the second side surface 4-11 of the inner taper sleeve 4 cooperates with the first side surface 1-121 of the pressure head mechanism 1-12 (the inclination angles match), because the inner diameter of the first side surface 1-121 gradually narrows, the pressure head mechanism 1-12 will gradually move inward during the movement of the inner taper sleeve 4, and then the screw sleeve ring of the necking mechanism 1-1 is tightened.

[0051] The above only describes the specific implementation of the utility model, so that those skilled in the art can understand or implement the utility model. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model.

[0052] It is to be understood that the present application is not limited to the particular examples described and that various modifications and alterations can be made without departing from the scope of the present application. The scope of the present application is limited only by the claims appended hereto.

Claims

1. A multi-purpose necking device, characterized in that, Includes a hydraulic mechanism (8), on which a hollow connecting shaft (2) is connected, a cavity (2-1) is provided inside the hollow connecting shaft (2), a constricting pressure head device (1) is provided inside the cavity (2-1), and an inner conical sleeve (4) is sleeved on the outside of the hollow connecting shaft (2), and the inner conical sleeve (4) is connected to the hydraulic mechanism (8); The constriction pressing head device (1) includes a constriction mechanism (1-1), which is divided into multiple constriction petals (1-11) along the axial direction. Each constriction petal (1-11) is provided with a pressing head mechanism (1-12) on the outer side of its upper end. The first side (1-121) of the pressing head mechanism (1-12) is inclined inward. The inner conical sleeve (4) includes a conical sleeve (4-1), and the second side (4-11) of the conical sleeve (4-1) is inclined outward. The first side (1-121) and the second side (4-11) cooperate with each other. The hydraulic mechanism (8) pushes the inner cone sleeve (4) upward, causing the constriction flap (1-11) to move inward. An elastic device (3) is provided between the constriction mechanism (1-1) and the inner cone sleeve (4), and the inner cone sleeve (4) is reset through the elastic device (3).

2. The multi-purpose necking device according to claim 1, characterized in that, The necking and pressing head device (1) includes a connecting pipe (1-2), and the necking mechanism (1-1) is equiaxially connected to the upper end of the connecting pipe (1-2).

3. The multi-purpose necking device according to claim 1, characterized in that, The bottom of the second side (4-11) is provided with a recessed placement platform (4-3), and the elastic device (3) is located between the placement platform (4-3) and the pressure head mechanism (1-12).

4. The multi-purpose necking device according to claim 1, characterized in that, The constriction mechanism (1-1) is provided with a positioning screw (9), and the bottom of the cavity (2-1) is provided with a screw hole, and the positioning screw (9) is screwed into the screw hole.

5. The multi-purpose necking device according to claim 1, characterized in that, The connecting end (2-2) of the hollow connecting shaft (2) is screwed to the connecting plate (7).

6. The multi-purpose necking device according to claim 1, characterized in that, The connecting end (2-2) of the hollow connecting shaft (2) is fitted with a connecting sleeve (5).

7. The multi-purpose necking device according to claim 1, characterized in that, The inner conical sleeve (4) includes a fixed sleeve (4-2), which is connected to the lower end of the conical sleeve (4-1) and is screwed to the hydraulic mechanism (8).

8. The multi-purpose necking device according to claim 1, characterized in that, The constriction mechanism (1-1) has internal threads.

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