Plug press-fitting tool

Abstract

The utility model belongs to the technical field of hydraulic pressure, and particularly relates to a plug press-fitting tool. Comprising a limiting pressing block, a plug, a plug press-fitting sleeve, a reset spring and a plug press-fitting rod. The limiting pressing block, the plug, the reset spring and the plug press-fitting rod are all installed on the plug press-fitting sleeve. The reset spring is arranged on the plug press-fitting rod, one end of the reset spring is flatly attached to the step face of the plug press-fitting rod, and the reset spring and the plug press-fitting rod are installed in the plug press-fitting sleeve together. The inner hole of the plug sleeves the other end of the plug mounting rod and is connected with the plug press-fitting sleeve; the limiting pressing block is connected with the head of the plug press-fitting rod. The plug press-fitting device is simple in structure, small in size, light in weight and convenient to use, and the working efficiency and the plug press-fitting qualification rate are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulics, and particularly relates to a plug pressing tool. Background Art

[0002] With the development of the times and the progress of technology, the output pressure of hydraulic systems is gradually increasing. Especially in the aviation field, the increase in system pressure means a reduction in system weight. For some aerospace hydraulic systems, the number of hydraulic plugs used reaches hundreds or thousands, and the installation quality of each hydraulic plug is related to the reliability of the hydraulic system and the safety of the whole aircraft. Ordinary ball-expanded plugs have poor sealing reliability and are likely to cause deformation of aluminum alloy valve blocks; screw plugs are heavy and require a large installation space; split-type hydraulic plugs (the plug core and the plug shell are separately bulk-packed) have the advantages of small size, light weight, and reliable sealing.

[0003] Due to the small size of the split-type hydraulic plug (with an outer diameter of 3 mm to 5 mm), it is difficult to hold it with tweezers, and it is very difficult to ensure that the plug core is vertically pressed in. If the plug core is not vertically pressed in, the plug will have unreliable sealing; the installation area of the plug core is small, and it is difficult for the pressure of the press to evenly act on the installation surface of the plug core, and directly using the press for installation makes it difficult to control the pressing depth of the plug core. By using a plug pressing tool, the work efficiency of the plug pressing operation is improved, and the qualification rate of the plug pressing is also improved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a plug pressing tool.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A plug pressing tool includes a limit pressing block, a screw plug, a plug pressing sleeve, a return spring, and a plug pressing rod; the limit pressing block, the screw plug, the return spring, and the plug pressing rod are all installed on the plug pressing sleeve.

[0006] The return spring is arranged on the plug pressing rod, and one end of the return spring is flush with the step surface of the plug pressing rod. The return spring and the plug pressing rod are installed in the plug pressing sleeve together; the inner hole of the screw plug is sleeved on the other end of the plug pressing rod and is connected to the plug pressing sleeve; the limit pressing block is connected to the head of the plug pressing rod.

[0007] An exhaust hole is designed at the head of the plug pressing rod of the plug pressing tool.

[0008] The limit pressing block and the plug pressing rod are connected by threads, and the screw plug and the plug pressing sleeve are connected by threads.

[0009] The plug core is installed in the small hole on the left side of the plug pressing sleeve, and a part of the plug core is exposed outside the plug pressing sleeve. The plug shell is placed into the plug hole of the valve block.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: (1) The present invention adopts a plug core cavity with an outer diameter slightly larger than that of the plug core, into which the plug core can be easily placed and its vertical installation can be ensured, which is far superior to the operation of clamping by the operator with tweezers; (2) The present invention uses a limit pressing block, and the pressing depth of the plug core can be adjusted by adjusting the limit pressing block to ensure that the installation of the plug meets the design requirements. Compared with the previous method of multiple press-ins and visual adjustment, the working efficiency is significantly improved and the consistency of plug installation is better; (3) The present invention makes the installation of the hydraulic plug foolproof, and significantly reduces the skills and operation proficiency requirements for the plug pressing personnel.

[0011] To more clearly illustrate the functional characteristics and structural parameters of the present utility model, the following further explains in conjunction with the drawings and specific embodiments. Description of the Drawings

[0012] The drawings described herein are used to provide a further understanding of the present utility model and form a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0013] Figure 1 is the structural diagram of the plug installation tool of the present utility model;

[0014] Figure 2 is the partial enlarged view of the pressing head of the plug installation tool of the present utility model;

[0015] The reference numerals in the drawings are: 1 - limit pressing block, 2 - screw plug, 3 - plug pressing sleeve, 4 - return spring, 5 - plug pressing rod, 6 - plug core, 7 - plug shell, 8 - valve block. Specific Embodiments

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the 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; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] A plug pressing tool of the present application includes a limit pressing block 1, a screw plug 2, a plug pressing sleeve 3, a return spring 4, and a plug pressing rod 5; the limit pressing block 1, the screw plug 2, the return spring 4, and the plug pressing rod 5 are all installed on the plug pressing sleeve 3.

[0018] The reset spring 4 is arranged on the plug pressing rod 5, and one end of the reset spring 4 is flush with the stepped surface of the plug pressing rod 5. The reset spring 4 and the plug pressing rod 5 are installed together in the plug pressing sleeve 3; the inner hole of the screw plug 2 is sleeved on the other end of the plug pressing rod 5 and is connected to the plug pressing sleeve 3; the limit pressing block 1 is connected to the head of the plug pressing rod 5.

[0019] The plug installation tool is internally designed with a reset spring 4. Through the reset spring, it can be ensured that after each plug installation is completed, the plug pressing rod 5 returns to its original position, leaving a plug core cavity.

[0020] The head of the plug pressing rod 5 of the plug pressing tool is designed with an exhaust hole. When the plug core 6 is pressed into the plug shell 7, the air in the cavity of the plug shell 7 enters the exhaust hole of the plug pressing rod along the exhaust hole of the plug core 6, so that the internal and external pressures are balanced during the plug pressing process.

[0021] The limit pressing block 1 and the plug pressing rod 5 are connected by threads, and the distance between the limit pressing block 1 and the screw plug 2 can be adjusted arbitrarily. The pressing depth of the plug core 6 can be determined according to the design requirements; the screw plug 2 and the plug pressing sleeve 3 are connected by threads. The screw plug 2 restricts the return position of the plug pressing rod 5 and restricts the volume of the plug core cavity at the head of the plug installation sleeve 3, ensuring that the plug core 6 is not buried too deep in the plug core cavity, so that the plug core 6 can leave a certain pressing guide length.

[0022] The plug core 6 is installed in the left small hole of the plug pressing sleeve 3, and a part of the plug core 6 is exposed outside the plug pressing sleeve 3. The plug shell 7 is placed in the plug hole of the valve block 8.

[0023] The working principle of the plug pressing tool is as follows: First, the plug core 6 is placed in the left small hole of the plug pressing sleeve 3 of the plug pressing tool, and the plug shell 7 is placed in the plug hole of the valve block 8. Then, the central axes of the plug pressing tool with the plug core 6 and the plug shell 7 are aligned. The height of the limit pressing block is adjusted according to the plug pressing depth. The limit pressing block 1 is pressed by a press, and the limit pressing block 1 drives the plug pressing rod 5 to press the plug core 6 into the plug shell 7 until the end face of the limit pressing block 1 is flush with the screw plug 2. When a plug pressing is completed, the plug pressing rod 5 returns to its original position under the action of the reset spring 4, and a plug core cavity appears at the bottom of the plug pressing sleeve 3. The operator fills the plug core 6 into the plug core cavity to prepare for the next pressing.

[0024] When the present invention is in use, a plug core 6 is inserted into the plug core cavity at the lower end of the plug pressing tool. Hold the middle part of the plug pressing sleeve 3 of the plug pressing tool, and vertically insert the protruding guiding part of the plug core 6 into the plug shell 7. The press head slowly presses towards the limit pressing block 1 of the plug pressing tooling. As the pressing depth gradually increases, the lower surface of the limit pressing block 1 fits against the screw plug 2, followed by a sudden increase in the press pressure. At this time, stop the pressing. The plug pressing rod 5 moves upward under the action of the return spring 4 until it is limited by the screw plug.

[0025] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0026] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A plug press-fitting tool, characterized in that It includes a limit pressing block (1), a screw plug (2), a plug pressing sleeve (3), a return spring (4), and a plug pressing rod (5); the limit pressing block (1), the screw plug (2), the return spring (4), and the plug pressing rod (5) are all installed on the plug pressing sleeve (3).

2. The plug pressing tool according to claim 1, characterized in that, The return spring (4) is arranged on the plug pressing rod (5), and one end of the return spring (4) is flush with the step surface of the plug pressing rod (5). The return spring (4) and the plug pressing rod (5) are installed together in the plug pressing sleeve (3); the inner hole of the screw plug (2) is sleeved on the other end of the plug pressing rod (5) and is connected to the plug pressing sleeve (3); the limit pressing block (1) is connected to the head of the plug pressing rod (5).

3. The plug pressing tool according to claim 2, wherein An exhaust hole is designed at the head of the plug pressing rod (5) of the plug pressing tool.

4. The plug press-fitting tool according to claim 3, characterized in that, The limit pressing block (1) is threadedly connected to the plug pressing rod (5), and the screw plug (2) is threadedly connected to the plug pressing sleeve (3).

5. The plug pressing tool according to claim 1, wherein A plug core (6) is installed in the small hole on the left side of the plug pressing sleeve (3), and a part of the plug core (6) is exposed outside the plug pressing sleeve (3). A plug shell (7) is placed in the plug hole of the valve block (8).

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