Built-in snap ring automatic assembly device and method

Abstract

An automatic assembly device and method for built-in snap ring, the device comprises a control device, a shaft coupling, a nut jig, a snap ring guide block, a nut, a snap ring clamping module, a snap ring, a snap ring positioning module, a nut connecting piece and a nut connecting piece jig. The control device, the snap ring positioning module, the snap ring guide block, the snap ring clamping module and the nut jig are designed as an automatic nut built-in snap ring installation device. The separation between the modules is realized through pneumatic and electric control. In the case that the assembled snap ring and the outer sleeve nut can meet the use requirements, the operation steps of the snap ring and the outer sleeve nut installation are optimized, and the dependence on personnel is reduced. During the assembly process, the snap ring and the outer sleeve nut are quickly installed. The problems of high skill requirement and low installation efficiency of personnel in the traditional installation process are solved, and the labor efficiency is improved and the product quality is increased.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of liquid rocket engine manufacturing, and particularly relates to an automatic assembling method of an inner snap ring of an electric valve shell assembly for supplying and discharging control gas or blowing gas of a liquid rocket engine. BACKGROUND

[0002] For a rocket engine using liquid oxygen / hydrocarbon, liquid oxygen / liquid hydrogen and other direct-flow liquids, a high-pressure electromagnetic valve is generally used to supply or discharge control gas or control blowing gas for each pneumatic valve. The electromagnetic valve is a valve that converts electrical energy into mechanical energy to operate by an electromagnet. The key part of the electromagnetic valve is a coil assembly, and the connection of the coil assembly and the electromagnetic valve shell is achieved by a sleeve nut in a positive and negative thread connection mode, and the sleeve nut and the coil assembly are connected by an inner snap ring. Manual installation using a tool clamp is low in efficiency and labor-intensive. SUMMARY

[0003] The technical problem solved by the application is to overcome the deficiencies of the prior art, and to provide an inner snap ring automatic assembling device and method, which can reliably ensure the assembly efficiency and quality performance requirements of the component.

[0004] The technical scheme of the application is an inner snap ring automatic assembling device, which comprises a control device, a shaft coupling, a nut jig, a snap ring guide block, a nut, a snap ring clamping module, a snap ring, a snap ring positioning module, a nut connecting piece and a nut connecting piece jig.

[0005] The control device is internally formed by a pressure mechanism and is integrally installed at the top of the rack to provide power to control the up and down movement of the nut; the shaft coupling is fixed by threads below the control device to bear the force applied by the control device and directly act on the nut fixture and indirectly act on the nut to move it up and down; the nut fixture is installed at the middle position of the rack and is fixedly connected through the lower end of the shaft coupling; the left and right ends of the nut fixture are provided with guide holes of slide rails, which are guided by the slide rails on the rack and can move up and down on the slide rails of the rack, and the lifting is realized by the driving of the control device; the snap ring guide block is placed on the upper surface of the nut connecting piece and is directly below the nut fixture to install the snap ring; the nut is provided with an embedded groove to install the snap ring; the snap ring is limited by the snap ring and is connected with the nut connecting piece at the same time; the snap ring clamping module is directly contacted and installed with the snap ring to shrink the snap ring during the installation of the snap ring; the snap ring positioning module is installed and fixed on the rack and is between the snap ring clamping module and the nut connecting piece in the height direction and has a gap, and the motion does not interfere with each other, which is used for positioning the height during the installation of the snap ring, isolating the snap ring from the nut connecting piece and preventing the snap ring from pressing the surface of the nut connecting piece; the nut connecting piece is clamped on the surface by the nut connecting piece fixture, and the position is fixed and remains unchanged during the installation of the nut and the snap ring; the nut connecting piece fixture is installed at the bottom of the rack and is lifted by its own control cylinder to clamp the nut connecting piece.

[0006] The nut fixture is provided with a motor, which can control the opening and tightening of the nut fixture to clamp the nut.

[0007] The thickness of the contact part of the snap ring clamping module is less than the thickness of the snap ring.

[0008] The snap ring clamping module is provided with a motor, and the snap ring clamping module can be driven to tighten and release by the motor.

[0009] During the installation of the snap ring, the nut is controlled to move downward by the control device, the snap ring guide block is designed as a conical structure, and the conical structure can expand the snap ring to press the nut connecting piece after the snap ring is expanded.

[0010] The contact part of the snap ring clamping module is a metal plate structure, and the thickness of the sheet is less than the height of the snap ring; when the snap ring clamping module releases the snap ring, it does not interfere with the nut, which is used to shrink the snap ring during the installation of the snap ring; the snap ring clamping module is driven and controlled by the motor to tighten and release.

[0011] The snap ring positioning module is provided with a motor, and the snap ring positioning module can be driven to tighten and release by the motor.

[0012] A method for automatically assembling the device, comprising the following steps:

[0013] The screw sleeve connector is installed into the screw cap connector jig, and the screw cap connector jig is raised to a mounting limiting position;

[0014] The screw cap is installed into the screw cap clamp, and the screw cap clamp is automatically clamped;

[0015] The clasp ring guide block is placed in the middle position of the screw sleeve connector;

[0016] The clasp ring is horizontally sleeved on the clasp ring guide block, and the inner ring surface of the clasp ring is guaranteed to be flush with the conical surface of the clasp ring guide block;

[0017] The clasp ring positioning module is moved above the surface of the screw sleeve connector, and can limit the clasp ring when the clasp ring moves downward, so that the upper surface of the screw sleeve connector is protected from being scratched by the clasp ring;

[0018] The control device is used to drive the screw cap, the clasp ring is expanded through the clasp ring guide block, is pressed into the screw sleeve connector, and falls to the clasp ring positioning module;

[0019] The screw cap position remains unchanged, and the clasp ring compression clamping module is driven to compress and clamp the clasp ring;

[0020] The control device continues to press downward through the screw cap, so that the bottom surface of the screw cap pushes the clasp ring, and the upper half of the clasp ring is pressed into the screw cap; at this time, the clasp ring has been tightened through the screw cap, the clasp ring clamping module is released, and is driven to return to the original position;

[0021] The screw cap continues to press downward to the upper surface of the clasp ring positioning module, and the clasp ring is automatically expanded and enters the inner groove of the screw cap.

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] The control device, the clasp ring positioning module, the clasp ring guide block, the clasp ring clamping module and the screw cap jig are designed into an automatic screw cap built-in clasp ring mounting device, separation between the modules is realized through pneumatic and electric control, the operation steps of clasp ring and sleeve nut mounting are optimized under the condition that the assembled clasp ring and sleeve nut can meet the use requirements, and the dependence on personnel is reduced; during the assembly process, the clasp ring and the sleeve nut are quickly mounted. The problems of high requirement for personnel operation skills and low installation efficiency in the traditional installation process are solved, and the effects of improving labor efficiency and increasing product quality are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a typical structure half-sectional view of the built-in clasp ring automatic assembly device of the present application;

[0025] Figure 2 It is a local enlarged view of the typical structure half-sectional view of the built-in clasp ring automatic assembly device of the present application; DETAILED DESCRIPTION

[0026] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and specific examples.

[0027] As shown in Figure 1 , 2 The present application relates to an automatic assembly device for built-in snap ring, comprising a control device 1, a shaft coupling 2, a nut fixture 3, a snap ring guide block 4, a nut 5, a snap ring clamping module 6, a snap ring 7, a snap ring positioning module 8, a nut connecting piece 9 and a nut connecting piece fixture 10.

[0028] The control device 1 is integrally installed at the top of the rack 11, used to provide power and control the up and down movement of the nut, mainly composed of pressure mechanism inside;

[0029] The shaft coupling 2 is fixed by thread at the bottom of the control device 1, used to receive the force applied by the control device 1, directly acting on the nut fixture 3 and indirectly acting on the nut 5 to make it move up and down;

[0030] The nut fixture 3 is installed at the middle of the second layer of the rack 11 and fixedly connected at the lower end of the shaft coupling 2; the left and right ends of the nut fixture 3 are provided with guide holes, guided by the slide rails on the rack 11, capable of moving up and down on the rack slide rails, driven by the control device 1 to realize lifting;

[0031] The snap ring guide block 4 is placed on the upper surface of the nut connecting piece 9, directly below the nut fixture 3; during the installation of the snap ring 7, the nut 5 is controlled to move downward by the control device 1, and the snap ring guide block 4 is designed as a conical structure, which can effectively expand the snap ring 7, so that the expanded snap ring is pressed into the nut connecting piece 9;

[0032] The nut 5 is provided with an inner groove for installing the snap ring 7; the snap ring 7 is limited and the nut 5 is connected with the nut connecting piece 9 at the same time;

[0033] The snap ring clamping module 6 is directly contacted and installed with the snap ring 3, the contacted part of the snap ring clamping module 6 is a metal plate structure, and the thickness of the sheet is less than the height of the snap ring 3, so that the nut can contact the upper surface of the snap ring when it is pressed down, and the snap ring clamping module 6 does not interfere with the nut when it is released, used to shrink the snap ring during the installation of the snap ring 7; the snap ring clamping module 6 is driven by the motor to control clamping and relaxation;

[0034] The snap ring positioning module 8 is fixedly installed on the rack 11, between the snap ring clamping module 6 and the nut connecting piece 9 in the height direction, and there is a gap, so that they do not interfere with each other during movement, used to position the height during the installation of the snap ring, isolate the snap ring 3 from the nut connecting piece, and prevent the snap ring 3 from pressing the surface of the nut connecting piece 9;

[0035] The screw cap connector 9 is clamped on the surface by the screw cap connector jig 10, and is fixed in position during the installation of the screw cap and the snap ring;

[0036] The screw cap connector jig 10 is installed at the bottom of the rack 11 and is lifted by the control cylinder to clamp the screw cap connector 9.

[0037] The application also relates to a method for automatically assembling the device, which specifically comprises the following steps:

[0038] 1. Install the screw cap connector 9. The screw cap connector 9 is clamped in the screw cap connector jig 10, and the screw cap connector jig 10 is lifted to the installation limit position; Figure 1

[0039] 2. Install the screw cap 2. The screw cap 2 is clamped in the screw cap clamp 1, and the screw cap clamp 1 is driven by the motor to automatically clamp on the slide rail;

[0040] 3. Install the snap ring guide block 4. The large end of the snap ring guide block 4 is placed horizontally on the middle position of the screw cap connector 9, and the small end of the snap ring guide block 4 is directed upward.

[0041] 4. The snap ring 7 is horizontally clamped on the snap ring guide block 4, and the inner ring surface of the snap ring is aligned with the tapered surface of the snap ring guide block 4;

[0042] 5. The snap ring positioning module 6 is moved above the screw cap connector 9. The snap ring positioning module 6 is moved horizontally above the screw cap connector 9 by the motor control, so as to prevent the snap ring 3 from moving and to ensure that the installation position is not exceeded during the installation of the snap ring 3.

[0043] 4. Install the snap ring 7 to the screw cap connector 9. The control device 1 drives the screw cap 5 to open the snap ring 7 through the snap ring guide block 4, and the snap ring 7 is pressed into the screw cap connector 9 and falls to the snap ring positioning module 8;

[0044] 5. The snap ring positioning module 8 is moved above the screw cap connector 9 by the motor or pneumatic drive, so as to prevent the snap ring 7 from moving.

[0045] 6. The screw cap 5 presses the snap ring 7. The control device 1 continues to press the screw cap 5, so that the bottom surface of the screw cap 5 pushes the snap ring 7, and the upper half of the snap ring is pressed into the screw cap 5;

[0046] 7. The snap ring clamping module 6 is released back to the original position. The snap ring clamping module 6 is released, and the snap ring is tightened by the screw cap, and then the snap ring clamping module 6 is released and driven back to the original position;

[0047] ​8 snap ring 7 is installed into the screw cap 5. The screw cap 5 continues to press down to the snap ring positioning module 7, the snap ring 7 is automatically rebounded by the material performance of itself, and enters the position required to be installed by the screw cap 5, the connection of the screw cap and the connecting piece of the screw cap is realized through the snap ring;

[0048] Those skilled in the art should understand that the above embodiments are only exemplary embodiments, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

[0049] The part not described in detail in the present application is the common knowledge of those skilled in the art.

Claims

1. An automatic built-in snap ring assembly device, characterized by: The utility model relates to a control device, a shaft coupling, a nut fixture, a snap ring guide block, a nut, a snap ring clamping module, a snap ring, a snap ring positioning module, a nut connecting piece and a nut connecting piece fixture. The control device is internally composed of a pressure mechanism and is integrally installed at the top of the rack to provide power and control the up-down movement of the nut. The shaft coupling is fixed by threads below the control device to bear the force applied by the control device and directly act on the nut fixture and indirectly act on the nut to move it up and down. The nut fixture is installed at the middle position of the rack and is fixedly connected with the lower end of the shaft coupling. The nut fixture is provided with guide holes at both ends of the slide rails and can move up and down on the slide rails of the rack through the guide holes and the slide rails on the rack.

2. The automatic built-in ring assembly device according to claim 1, wherein: The snap ring guide block is placed on the upper surface of the nut connecting piece and is directly below the nut fixture to install the snap ring.

3. The automatic built-in ring assembly device according to claim 1, wherein: The nut is provided with an internal groove to install the snap ring.

4. The automatic built-in ring assembling device according to claim 1, wherein: The snap ring clamping module is directly installed in contact with the snap ring to shrink the snap ring during the installation of the snap ring.

5. A method of automatically assembling the device of claim 1, wherein The snap ring positioning module is installed and fixed on the rack between the snap ring clamping module and the nut connecting piece in the height direction with a gap. The snap ring positioning module does not interfere with each other during movement and is used to position the height during the installation of the snap ring, isolate the snap ring from the nut connecting piece and prevent the snap ring from pressing the surface of the nut connecting piece. The nut connecting piece is clamped on the surface by the nut connecting piece fixture and remains stationary during the installation of the nut and the snap ring. The nut connecting piece fixture is installed at the bottom of the rack and is lifted and lowered by its own control cylinder to clamp the nut connecting piece. The snap ring clamping module is equipped with a motor and can be driven by the motor to tighten and release. During the installation of the snap ring, the nut is controlled to move downward by the control device, the snap ring guide block is designed as a conical structure, the conical structure can expand the snap ring, and the expanded snap ring is pressed into the nut connecting piece. The contact part of the snap ring clamping module is a metal plate structure with a thickness less than the height of the snap ring. The nut fixture is equipped with a motor and can be controlled by the motor to open and tighten the nut fixture to clamp the nut. The thickness of the contact part of the snap ring clamping module and the snap ring is less than the thickness of the snap ring. The snap ring positioning module is equipped with a motor and can be driven by the motor to tighten and release. It comprises: The nut connecting piece is installed in the nut connecting piece fixture, and the nut connecting piece fixture is raised to the installation limit position. The nut is installed in the nut clamp, and the nut clamp is automatically clamped. The snap ring guide block is placed at the middle position of the nut connecting piece. The snap ring is horizontally installed on the snap ring guide block to ensure that the inner surface of the snap ring is flush with the conical surface of the snap ring guide block. The clasp positioning module moves above the surface of the screw cap connector, which can limit the clasp when it moves downward, and protect the upper surface of the screw cap connector from being scratched by the clasp; The control device is used to drive the screw cap, the clasp is opened by the clasp guide block, and is pressed into the screw cap connector and falls to the clasp positioning module; The screw cap position remains unchanged, and the clasp clamping module is driven to compress and clamp the clasp; The control device continues to press the screw cap, and the bottom surface of the screw cap pushes the clasp, and the upper half of the clasp is pressed into the screw cap; at this time, the clasp is tightened by the screw cap, the clasp clamping module is released, and is driven back to the original position; The screw cap continues to press down to the upper surface of the clasp positioning module, and the clasp automatically opens and enters the groove in the screw cap.

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