Automatic assembling device and method for built-in clamping ring

Abstract

The invention discloses an automatic assembling device and method for a built-in clamping ring. The device comprises a control device, a coupler, a nut jig, a clamping ring guide block, a nut, a clamping ring clamping module, a clamping ring, a clamping 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 to be a device for automatically installing the snap ring in the nut, separation of all the modules is achieved through pneumatic and electric control, and under the condition that the assembled snap ring and the outer sleeve nut can meet the use requirement, the assembly efficiency is greatly improved. The operation steps of installation of the clamping ring and the outer sleeve nut are optimized, and dependence on personnel is reduced; in the assembling process, quick installation of the clamping ring and the outer sleeve nut is achieved. The assembling problems that in the traditional installation process, the requirement for the operation skill of personnel is high, and the installation efficiency is low are solved, and the effects of improving the labor efficiency and improving the product quality are achieved.

Description

Technical Field

[0001] This application belongs to the technical field of liquid rocket engine manufacturing, and specifically relates to an automatic assembly method for an internal snap ring of an electric air valve housing assembly for supplying and discharging control gas or purging gas in a liquid rocket engine. Background Art

[0002] For rocket engines using direct-current liquids such as liquid oxygen / hydrocarbon and liquid oxygen / liquid hydrogen, high-pressure solenoid valves are generally used to supply or discharge control gas to each pneumatic valve, or to control purging gas. A solenoid valve is a valve that converts electrical energy into mechanical energy by an electromagnet to manipulate its action. The key part of a solenoid valve is the coil assembly. The connection between the coil assembly and the solenoid valve housing is through an outer sleeve nut, with a positive and negative thread connection method, and the outer sleeve nut and the coil assembly are connected through an internal snap ring. Manual installation using a tool clamp has low efficiency and requires a large amount of labor. Summary of the Invention

[0003] The technical problem solved by the present invention is: overcoming the deficiencies of the prior art, providing an internal snap ring automatic assembly device and method that can reliably ensure the assembly efficiency and quality performance requirements of this component.

[0004] The technical solution of the present invention is: An internal snap ring automatic assembly device includes a control device, a 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 connector, and a nut connector fixture;

[0005] The control device is composed of a pressure mechanism inside and is integrated and installed at the top of the frame to provide power to control the nut to move up and down; the coupling is fixed to the bottom of the control device through threads to receive the force applied by the control device, directly act on the nut fixture, and indirectly act on the nut to move it up and down; the nut fixture is installed in the middle position of the frame and is fixedly connected through the lower end of the coupling; the left and right ends of the nut fixture are provided with guide holes for the slide rails, and the nut fixture can be guided by the slide rails on the frame and can be lifted and lowered by the control device; the snap ring guide block is placed on the upper surface of the nut connector and is located directly below the nut fixture, and is used to install the snap ring; the nut is provided with a built-in groove for installing the snap ring; The snap ring is used to limit the position and connect the nut to the nut connector at the same time; the snap ring clamping module is installed in direct contact with the snap ring and is used to shrink the snap ring during the installation of the snap ring; the snap ring positioning module is installed and fixed on the frame, and is located between the snap ring clamping module and the nut connector in the height direction, with a gap, and does not interfere with each other during movement. It is used to position the height during the installation of the snap ring, isolate the snap ring from the nut connector, and prevent the snap ring from crushing the surface of the nut connector; the nut connector is clamped on its surface by a nut connector fixture, and its position is fixed and motionless during the installation of the nut and the snap ring; the nut connector fixture is installed at the bottom of the frame and is raised and lowered by its own control cylinder to clamp the nut connector.

[0006] The nut fixture itself is equipped with a motor, which can control the opening and tightening of the nut fixture through the motor to achieve clamping of the nut.

[0007] The thickness of the contact portion between the clamping ring clamping module and the clamping ring is smaller than the thickness of the clamping ring.

[0008] The clamping ring clamping module itself is equipped with a motor, and the clamping ring clamping module can be tightened and released by the motor.

[0009] During the installation of the snap ring, the nut is controlled to move downward by a control device. The snap ring guide block is designed to have a conical structure. The conical structure can open the snap ring so that the snap ring is expanded and pressed into the nut connector.

[0010] The snap ring clamping module is a metal plate structure in contact with the snap ring, and the thickness of the sheet is smaller than the height of the snap ring; when the screw sleeve is pressed down to contact the upper surface of the snap ring, the snap ring clamping module does not interfere with the screw sleeve when loosening the snap ring, and is used to shrink the snap ring during the installation of the snap ring; the snap ring clamping module is controlled by a motor to clamp and release.

[0011] The snap ring positioning module itself is equipped with a motor, and the snap ring positioning module can be tightened and released by the motor.

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

[0013] Insert the sleeve connector into the nut connector fixture, and the nut connector fixture is raised to the installation limit position;

[0014] Insert the nut into the nut fixture, and the nut fixture automatically clamps;

[0015] Place the snap ring guide block at the middle position of the sleeve connector;

[0016] Put the snap ring horizontally on the snap ring guide block, ensuring that the inner surface of the snap ring is flush with the conical surface of the snap ring guide block;

[0017] The snap ring positioning module moves above the surface of the sleeve connector, and can limit its position when the snap ring moves downward, protecting the upper surface of the sleeve connector from being scratched by the snap ring;

[0018] Use the control device to drive the nut, expand the snap ring through the snap ring guide block, press it into the installation sleeve connector, and lower it to the snap ring positioning module;

[0019] Keep the position of the nut stationary, and drive the snap ring clamping module to compress and clamp the snap ring;

[0020] The control device continues to press down the nut through control, so that the bottom surface of the nut pushes the snap ring, and the upper half of the snap ring is pressed into the nut; at this time, the snap ring has been tightened through the nut, release the snap ring clamping module, and return to the original position under the driving force;

[0021] The nut continues to press down to the upper surface of the snap ring positioning module, and the snap ring automatically pops open and enters the inner groove of the nut.

[0022] The beneficial effects of the present invention compared with the prior art are:

[0023] Design the control device, snap ring positioning module, snap ring guide block, snap ring clamping module, and nut fixture into a device for automatically installing a snap ring inside the nut. Through pneumatic and electric control, the separation between modules is realized. When the assembled snap ring and outer sleeve nut can meet the usage requirements, the operation steps for installing the snap ring and outer sleeve nut are optimized, reducing the dependence on personnel; during the assembly process, the rapid installation of the snap ring and outer sleeve nut is realized. It solves the assembly problems of high requirements for personnel operation skills and low installation efficiency in the traditional installation process, achieving the effects of improving labor efficiency and increasing product quality. Description of the Drawings

[0024] Figure 1 It is a semi-sectional view of the typical structure of an automatic assembly device for an internally installed snap ring of the present invention;

[0025] Figure 2 It is a partial enlarged view of the semi-sectional view of the typical structure of an automatic assembly device for an internally installed snap ring of the present invention; Detailed Implementation Modes

[0026] The following will further elaborate on the specific implementation of the present invention in detail in conjunction with the accompanying drawings and specific embodiments.

[0027] As Figure 1 、 2 shown, the present invention relates to an automatic assembly device for an internal snap ring, including a control device 1, a 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 connector 9, and a nut connector fixture 10;

[0028] The control device 1 is integrally installed at the uppermost part of the frame 11, used to provide power and control the up and down movement of the nut. It mainly consists of a pressure mechanism inside;

[0029] The coupling 2 is fixed directly below the control device 1 by threads, used to receive the force applied by the control device 1, directly act on the nut fixture 3, and indirectly act on the nut 5 to make it move up and down;

[0030] The nut fixture 3 is installed at the second layer in the middle of the frame 11 and is fixedly connected to the lower end of the coupling 2; there are guide holes at both left and right ends of the nut fixture 3, guided by the slide rails on the frame 11, and can move up and down on the frame slide rails, and realize lifting through the drive of the control device 1;

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

[0032] The nut 5 is provided with an internal groove for installing the snap ring 7; the snap ring 7 is used for limiting and at the same time connecting the nut 5 and the nut connector 9;

[0033] The snap ring clamping module 6 is directly in contact with the snap ring 3 for installation. The part of the snap ring clamping module 6 in contact with the snap ring is a metal plate-like structure, and the thickness of the thin plate is less than the height of the snap ring 3. The purpose is that when the nut sleeve presses down to contact the upper surface of the snap ring and the snap ring clamping module 6 loosens the snap ring, there is no interference with the nut sleeve, and it is used to contract the snap ring during the installation of the snap ring 7; the snap ring clamping module 6 is driven by a motor to control clamping and relaxation;

[0034] The snap ring positioning module 8 is installed and fixed on the frame 11, and is located between the snap ring clamping module 6 and the nut connector 9 in the height direction and has a gap, and there is no interference during movement. It is used to position the height during the installation of the snap ring, isolate the snap ring 3 from the nut connector, and prevent the snap ring 3 from damaging the surface of the nut connector 9;

[0035] For the nut connector 9, its surface is clamped by the nut connector fixture 10 and remains stationary during the installation of the nut and the snap ring.

[0036] The nut connector fixture 10 is installed at the bottom of the frame 11 and is lifted by its own control cylinder for clamping the nut connector 9.

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

[0038] 1. Install the bushing connector 9. Place the bushing connector 9 into the nut connector fixture 10 according to the Figure 1 positional relationship, and the nut connector fixture 10 is raised to the installation limit position.

[0039] 2. Install the nut 2. Place the nut 2 into the nut fixture 1, and the nut fixture 1 is driven by the equipped motor and automatically clamped on the slide rail.

[0040] 3. Install the snap ring guide block 4. Place the bottom surface of the large end of the snap ring guide block 4 horizontally at the middle position of the bushing connector 9, with the small end face of the snap ring guide block 4 facing upward.

[0041] 4. Horizontally sleeved the snap ring 7 on the snap ring guide block 4 to ensure that the inner surface of the snap ring is flush with the conical surface of the snap ring guide block 4.

[0042] 5. The snap ring positioning module 6 moves above the bushing connector 9. The snap ring positioning module 6 is controlled by its own equipped motor and moves horizontally above the bushing connector 9 to prevent the snap ring 3 from being limited during movement and ensure that the movement distance during the installation of the snap ring 3 is too large and exceeds the installation position.

[0043] 4. Install the snap ring 7 onto the bushing connector 9. Use the control device 1 to drive the nut 5, expand the snap ring 7 through the snap ring guide block 4, press it into the bushing connector 9, and lower it to the snap ring positioning module 8.

[0044] 5. The snap ring positioning module 8. The snap ring positioning module 8 is driven by electric or pneumatic means to move above the bushing connector 9 to prevent the snap ring 7 from being limited during movement.

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

[0046] 7. The snap ring clamping module 6 releases and returns to the original position. The snap ring clamping module 6 is loosened. At this time, the snap ring has been tightened by the nut, and then the snap ring clamping module 6 can be released and returned to the original position under the driving force.

[0047] The snap ring 7 is inserted into the nut 5. The nut 5 continues to be pressed down until it reaches the snap ring positioning module 7. The snap ring 7 automatically rebounds due to its own material properties and enters the position where the nut 5 needs to be installed, realizing the connection of the nut and the connecting piece of the nut 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 invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

[0049] The parts not detailed in the present invention belong to the common general knowledge of those skilled in the art.

Claims

1. An automatic assembly device for a built-in snap ring, characterized in that: It comprises a control device (1), a 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 connector (9) and a nut connector fixture (10); The control device (1) is internally composed of a pressure mechanism and is integrated and installed at the top of the frame (11) to provide power and control the nut to move up and down; the coupling (2) is fixed to the control device (1) by threads and is used to receive the force applied by the control device (1), directly act on the nut fixture (3), and indirectly act on the nut (5) to move it up and down; the nut fixture (3) is installed in the middle position of the frame (11) and is fixedly connected through the lower end of the coupling (2); the left and right ends of the nut fixture (3) are provided with guide holes for the slide rail, and can move up and down on the frame slide rail through the guide of the slide rail on the frame (11), and can be driven by the control device (1) to achieve lifting; the snap ring guide block (4) is placed on the upper surface of the nut connector (9) and is located directly below the nut fixture (3) and is used to install the snap ring (7); the nut (5) is provided with a built-in groove for installing the snap ring (7); The clamping ring (7) is used to limit the position, and the nut (5) is connected to the nut connector (9) at the same time; the clamping ring clamping module (6) is installed in direct contact with the clamping ring (3) and is used to shrink the clamping ring during the installation of the clamping ring (7); the clamping ring positioning module (8) is installed and fixed on the frame (11), and is located between the clamping ring clamping module (6) and the nut connector (9) in the height direction, and there is a gap, so that they do not interfere with each other during movement, and is used to position the height during the installation of the clamping ring, isolate the clamping ring (3) and the nut connector, and prevent the clamping ring (3) from crushing the surface of the nut connector (9); the nut connector (9) is clamped on its surface by a nut connector fixture (10), and is fixed in position during the installation of the nut and the clamping ring; the nut connector fixture (10) is installed at the bottom of the frame (11), and is lifted and lowered by its own control cylinder, and is used to clamp the nut connector (9).

2. The automatic assembly device for a built-in snap ring according to claim 1, characterized in that: The nut fixture (3) itself is equipped with a motor, and the opening and tightening of the nut fixture (3) can be controlled by the motor to achieve clamping of the nut (5).

3. The automatic assembly device for a built-in snap ring according to claim 1, characterized in that: The thickness of the clamping ring clamping module (6) and the contact portion of the clamping ring is smaller than the thickness of the clamping ring (3).

4. The automatic assembly device for a built-in snap ring according to claim 1, characterized in that: The snap ring clamping module (6) itself is equipped with a motor, and the snap ring clamping module (5) can be tightened and released by the motor.

5. The automatic assembly device for a built-in snap ring according to claim 1, characterized in that: 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 to have a conical structure. The conical structure can open the snap ring (7) so that the snap ring is expanded and pressed into the nut connector (9).

6. The automatic assembly device for a built-in snap ring according to claim 1, characterized in that: The snap ring clamping module (6) is a metal plate structure in contact with the snap ring, and the thickness of the sheet is less than the height of the snap ring (3); when the screw sleeve is pressed down to contact the upper surface of the snap ring, the snap ring clamping module (6) does not interfere with the screw sleeve when loosening the snap ring, and is used to shrink the snap ring during the installation of the snap ring (7); the snap ring clamping module (6) is controlled by a motor to clamp and loosen.

7. The automatic assembly device for a built-in snap ring according to claim 1, characterized in that: The snap ring positioning module (8) is itself equipped with a motor, and the snap ring positioning module (8) can be tightened and loosened by the motor.

8. A method for automatically assembling the device according to claim 1, characterized in that include: The threaded sleeve connector (9) is installed into the nut connector fixture (10), and the nut connector fixture (10) is raised to a limited installation position; The nut (2) is installed into the nut fixture (1), and the nut fixture (1) is automatically clamped; Place the snap ring guide block (4) in the middle of the threaded sleeve connector (9); Put the snap ring (7) horizontally on the snap ring guide block (4) to ensure that the inner ring surface of the snap ring is aligned with the conical surface of the snap ring guide block (4); The clamp ring positioning module (8) moves to the upper surface of the threaded sleeve connecting piece (9), and can limit the position of the clamp ring (7) when it moves downward, thereby protecting the upper surface of the threaded sleeve connecting piece (9) from being scratched by the clamp ring; The nut (5) is driven by the control device (1), the snap ring (7) is opened through the snap ring guide block (4), pressed into the mounting screw sleeve connector (9), and lowered to the snap ring positioning module (8); The nut (5) remains in position, and the snap ring clamping module (6) is driven to compress and clamp the snap ring (7); The control device (1) controls the nut (5) to continue to press downward, so that the bottom surface of the nut (5) pushes the snap ring (7), and the upper part of the snap ring is pressed into the nut (5); at this time, the snap ring has been tightened by the nut, the snap ring clamping module (6) is released, and is driven back to the original position; The nut (5) continues to be pressed down to the upper surface of the snap ring positioning module (7), and the snap ring (7) automatically pops open and enters the inner groove of the nut (5).

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