Automatic rubber o-ring built-in assembling device and method

Abstract

The application discloses an automatic assembling device and method for built-in rubber O-rings, and belongs to the technical field of rubber O-ring assembling devices.The device comprises a rubber O-ring clamp, a rubber O-ring, a contraction sliding mechanism, an expansion sliding mechanism, a workbench, a control cylinder and a supporting rod.The rubber O-ring clamp, the contraction sliding mechanism and the expansion sliding mechanism are combined into an automatic device for installing built-in rubber O-rings on nuts, and the separation between the mechanisms is realized through pneumatic and electric control.The device can automatically assemble rubber O-rings of different specifications in inner holes, and the assembled rubber O-rings can meet the use requirements, so that the operation steps of installing built-in rubber O-rings are optimized, and the dependence on personnel is reduced.In the assembling process, the built-in rubber O-rings can be quickly installed.The device solves the problems of high requirement for personnel operation skills and low assembling efficiency in the traditional assembling process, and improves the labor efficiency and the product quality.

Description

Technical Field

[0001] This application belongs to the field of liquid rocket engine manufacturing technology, specifically relating to an automatic assembly method for built-in rubber O-rings in liquid rocket engine valves. Background Technology

[0002] For rocket engines that use direct-flow liquids such as liquid oxygen / hydrocarbon or liquid oxygen / liquid hydrogen, the assembly of rubber O-rings with internal groove structures, such as solenoid valves, control valves, check valves, and pressure reducing valves, requires operators to first shrink the rubber O-rings to a smaller size, then insert them into the internal grooves of the parts, and finally fully expand them. This results in low assembly efficiency and high labor intensity. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide an automatic assembly device and method for built-in rubber O-rings. The device is applicable to the assembly of rubber O-rings of different specifications, and the method has simple and clear process requirements, and can reliably ensure the assembly efficiency and quality performance requirements of the component.

[0004] The technical solution of this invention is: an automatic assembly device for built-in rubber O-rings, comprising a rubber O-ring clamp, a rubber O-ring, a shrinking sliding mechanism, an expanding sliding mechanism, a worktable, a control cylinder, and a support rod; the worktable's robotic arm controls the rubber O-ring, ensuring it remains horizontal during movement and without significant deformation; the shrinking sliding mechanism is mounted on the worktable's surface for shrinking the rubber O-ring; the expanding sliding mechanism is also mounted on the worktable's surface for expanding the rubber O-ring; the worktable is placed on the ground or a tabletop and connects the shrinking sliding mechanism, the expanding sliding mechanism, the control cylinder, and the support rod; the control cylinder controls the movement of the shrinking and expanding sliding mechanisms; the support rod, mounted on the worktable's surface, fully expands the rubber O-ring after it has been installed.

[0005] The retraction sliding mechanism consists of three adjusting pins, three control cylinders, a guide rail, and a nut micro-recessor. The three adjusting pins are evenly distributed in a circle and installed in the middle of the retraction sliding mechanism. Each adjusting pin is equipped with a control cylinder and a nut micro-recessor is installed on each adjusting pin to adjust its initial position.

[0006] The three adjusting pins can horizontally support the rubber O-ring, and the control cylinder can drive the adjusting pins to retract the rubber O-ring in the radial direction along the guide rail.

[0007] The nut micro-recessor can adjust the initial position of the adjusting pin, and can meet the support and contraction requirements of rubber O-rings of different specifications.

[0008] The shrinking sliding mechanism can move up and down by being driven by a control cylinder. The contact surface between the adjusting pin structure and the rubber O-ring is a right angle, which enables the rubber O-ring to shrink radially. The right-angled bottom can support the bottom surface of the rubber O-ring. When the adjusting pin moves downward, it can disengage the rubber O-ring. When the shrinking sliding mechanism moves upward, it returns to its initial position.

[0009] The outward expansion sliding mechanism consists of three fixed claws, a control cylinder, a guide rail, and a nut micro-recessor. The three fixed claws have semi-circular grooves on their outer sides, which are used to provide internal support and limit the movement of the rubber O-ring when the fixed claws contract. The control cylinder can drive the fixed claws to radially expand the rubber O-ring along the guide rail. The nut micro-recessor can adjust the initial position of the fixed claws according to the inner diameter of the rubber O-ring, which can meet the support and contraction requirements of rubber O-rings of different specifications.

[0010] The diameter of the support rod is less than or equal to the inner diameter of the inner hole of the rubber O-ring to be installed, and it has a smooth chamfer to avoid scratching the rubber O-ring.

[0011] The support rod can restore the rubber O-ring after it is installed, allowing the rubber O-ring to fully expand and round.

[0012] A method for automatically assembling the device includes:

[0013] According to the specifications of the rubber O-ring, adjust the positions of the adjusting pins on the shrinking sliding mechanism and the fixed claws on the expanding sliding mechanism so that the diameter of the circle formed by the three adjusting pins is exactly equal to the outer diameter of the rubber O-ring;

[0014] The robotic arm controls the rubber O-ring clamping mechanism to clamp the rubber O-ring, moves it above the sliding mechanism, and places it on the grooves of the three adjusting pins;

[0015] The control cylinder drives the adjusting pin to shrink the rubber O-ring until its diameter is slightly smaller than the hole in the part to which the rubber O-ring is to be installed, ensuring that it can be directly inserted into the hole in the part to which the rubber O-ring is to be installed.

[0016] The robotic arm clamps the rubber O-ring part to be installed, moves the orifice of the rubber O-ring part to directly above the rubber O-ring, and controls the rubber O-ring part to move downward, so that the installation position of the rubber O-ring part is moved to the position of the rubber O-ring.

[0017] The control cylinder drives the adjusting pin to move downward, causing the rubber O-ring to disengage from the control of the adjusting pin. The rubber O-ring automatically returns to its original shape and enters the installation position of the rubber O-ring part.

[0018] The fixed claw pin opens the rubber O-ring, the rubber O-ring enters the installation position of the rubber O-ring part and automatically pops open into the inner groove of the part;

[0019] The robotic arm controls the components to rotate on a fixed support rod, causing the rubber O-ring to fully expand inside the part where the rubber O-ring is installed; ultimately, the rubber O-ring assembly meets the usage requirements.

[0020] The specific process of shrinking the rubber O-ring is as follows: the control cylinder drives the adjusting pin to shrink the rubber O-ring until its diameter is slightly smaller than the hole of the part to which the rubber O-ring is to be installed. The fixing claw pin plays a supporting role inside, ensuring that it can be directly inserted into the hole of the part to which the rubber O-ring is to be installed.

[0021] The advantages of this invention compared to the prior art are:

[0022] This device integrates a rubber O-ring clamp, a shrinking sliding module, and an expanding sliding module to automatically install rubber O-rings inside nuts. Pneumatic and electric controls enable the separation of these mechanisms. The device can flexibly adapt to automatically assembling rubber O-rings of different specifications within the inner hole. While ensuring the assembled rubber O-ring meets usage requirements, it optimizes the installation process, reducing reliance on manual labor. The assembly process enables rapid installation of the built-in rubber O-ring. This solves the problems of high skill requirements and low efficiency in traditional installation methods, thereby improving labor efficiency and product quality. Attached Figure Description

[0023] Figure 1 A structural view of an automatic assembly device with built-in rubber O-rings;

[0024] Figure 2 A partially enlarged view of the overall structure of an automatic assembly device with built-in rubber O-rings;

[0025] Figure 3 This is a schematic diagram of a rubber O-ring clamp structure; Detailed Implementation

[0026] The following embodiments are intended to enable those skilled in the art to more fully understand the present invention, but do not limit the invention in any way.

[0027] The specific implementation schemes of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1 , 2 As shown in Figure 3, the present invention relates to an automatic assembly device for built-in rubber O-rings, including a rubber O-ring clamp 1, a rubber O-ring 2, a shrinking sliding mechanism 3, an expanding sliding mechanism 4, a worktable 5, a control cylinder 6, and a support rod 7.

[0029] The robotic arm on the worktable 5 of the rubber O-ring clamp 1 is used to control the rubber O-ring 2. When moving, the rubber O-ring 2 remains horizontal and will not undergo significant deformation.

[0030] The shrinking sliding mechanism 3 is installed on the upper surface of the workbench 5 and is used to shrink the rubber O-ring;

[0031] The outward sliding mechanism 4 is installed on the upper surface of the workbench 5 and is used to expand the rubber O-ring;

[0032] The workbench 5 is placed on the ground or a tabletop and is used to connect the retractable sliding mechanism 3, the outward sliding mechanism 4, the control cylinder 6, and the support rod 7.

[0033] The control cylinder 6 is used to control the movement of the contraction sliding mechanism 3 and the expansion sliding mechanism 4. The contraction sliding mechanism 3 is equipped with 3 control cylinders 6, and the expansion sliding mechanism 4 is equipped with 3 control cylinders 6.

[0034] The support rod 7 is installed on the upper surface of the workbench 5. After the rubber O-ring is installed, the support rod 7 is used to fully expand the rubber O-ring.

[0035] The retraction sliding mechanism 3 consists of three adjusting pins 31, three control cylinders 6, a guide rail, and a nut micro-recessor 8. The three adjusting pins 31 are evenly distributed in a circle and installed in the middle position of the retraction sliding mechanism 3. Each adjusting pin 31 is equipped with a control cylinder 6 and a nut micro-recessor 8 is installed on each adjusting pin 31 to adjust the initial position of the adjusting pin 31.

[0036] The three adjusting pins 31 on the shrinking sliding mechanism 3 can horizontally support the rubber O-ring. The control cylinder can drive the adjusting pins 31 to shrink the rubber O-ring radially along the guide rail. The nut micro-recessor 8 can adjust the initial position of the adjusting pins, which can meet the support and shrinkage of rubber O-rings of different specifications. The shrinking sliding mechanism 3 can be driven up and down by the control cylinder 6. The contact surface between the adjusting pin structure and the rubber O-ring is a right angle, which can realize the radial shrinkage of the rubber O-ring. The right angle bottom can support the bottom surface of the rubber O-ring. When the adjusting pin moves downward, it can disengage the rubber O-ring 2. When the shrinking sliding mechanism 3 moves upward, it returns to its initial position.

[0037] The outward sliding mechanism 4 consists of three fixed claws 41, a control cylinder 6, a guide rail, and a nut differential cylinder 8.

[0038] The sliding mechanism 4 has three fixed claws 41 with semi-circular grooves on their outer sides. These grooves are used to support and limit the internal movement of the rubber O-ring 2 when the fixed claws 41 contract. The control cylinder can drive the fixed claws 41 to radially expand the rubber O-ring along the guide rail. The nut micro-sleeve can adjust the initial position of the fixed claws 41 according to the inner diameter of the rubber O-ring, which can meet the support and contraction requirements of rubber O-rings of different specifications.

[0039] The diameter of the support rod 7 is less than or equal to the inner diameter of the inner hole of the rubber O-ring to be installed, and it has a smooth chamfer to avoid scratching the rubber O-ring. After the rubber O-ring is installed, the support rod 7 can restore it to its original shape, allowing the rubber O-ring to fully expand and round.

[0040] The present invention also relates to an assembly method for an automatic assembly device for a built-in rubber O-ring, comprising the following steps:

[0041] Step 1: According to the specifications of the rubber O-ring, adjust the positions of the adjusting pins 31 on the shrinking sliding mechanism 3 and the fixing claws 41 on the expanding sliding mechanism 4 so that the diameter of the circle formed by the three adjusting pins 31 is exactly equal to the outer diameter of the rubber O-ring.

[0042] Step 2: Use the robotic arm to control the rubber O-ring clamping mechanism 1 to clamp the rubber O-ring, move it above the sliding mechanism 3, and place it on the groove of the three adjusting pins 31;

[0043] Step 3: Control cylinder 6 to drive adjusting pin 31 to shrink rubber O-ring 2 until its diameter is slightly smaller than the hole of the rubber O-ring part to be installed, so that it can be directly inserted into the hole of the rubber O-ring part to be installed.

[0044] Step 4: The robotic arm clamps the rubber O-ring part to be installed, moves the opening of the rubber O-ring part to be directly above the rubber O-ring 3, and controls the rubber O-ring part to be installed to move downwards, so that the installation position of the rubber O-ring part is moved to the position of the rubber O-ring.

[0045] Step 5: Control cylinder 6 to drive adjusting pin 31 to move downward, so that the rubber O-ring is disengaged from the control of adjusting pin 31. The rubber O-ring automatically returns to its original shape and enters the installation position of the rubber O-ring part.

[0046] Step 6: Fixing the claw pin 41 opens the rubber O-ring, the rubber O-ring enters the installation position of the rubber O-ring part and automatically pops open into the inner groove of the part;

[0047] Step 7: The robotic arm controls the parts to rotate on the fixed support rod 7, so that the rubber O-ring is fully expanded inside the part where the rubber O-ring is installed; finally, the rubber O-ring assembly meets the usage requirements.

[0048] Those skilled in the art should understand that the above embodiments are merely exemplary embodiments, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1.A method for automatically assembling an embedded rubber O-ring, relating to an automatic assembly device for an embedded rubber O-ring, comprising a rubber O-ring clamp (1), a rubber O-ring (2), a contraction sliding mechanism (3), an expansion sliding mechanism (4), a workbench (5), a control cylinder (6), a support rod (7); the rubber O-ring clamp (1) is arranged on the mechanical arm of the workbench (5) to control the rubber O-ring (2), and the rubber O-ring (2) remains in a horizontal state when moving and does not deform obviously; the contraction sliding mechanism (3) is installed on the upper surface of the workbench (5) to contract the rubber O-ring; the expansion sliding mechanism (4) is installed on the upper surface of the workbench (5) to expand the rubber O-ring; the workbench (5) is placed on the ground or a table top to connect the contraction sliding mechanism (3), the expansion sliding mechanism (4), the control cylinder (6) and the support rod (7); the control cylinder (6) is installed at the lower end of the contraction sliding mechanism (3) to control the up-and-down movement of the contraction sliding mechanism (3); the support rod (7) is installed on the upper surface of the workbench (5) to completely expand the rubber O-ring after the rubber O-ring is installed; the contraction sliding mechanism (3) is composed of three adjusting pins (31), three control cylinders, a guide rail and a nut differential cylinder (8); the three adjusting pins (31) are uniformly distributed in a circle and are installed at the middle position of the contraction sliding mechanism (3), each adjusting pin (31) is equipped with a control cylinder, and each adjusting pin (31) is installed with a nut differential cylinder (8) to adjust the initial position of the adjusting pin (31); the three adjusting pins (31) can horizontally support the rubber O-ring, and the control cylinder can drive the adjusting pin (31) to contract the rubber O-ring in the radial direction along the guide rail; the expansion sliding mechanism (4) is composed of three fixed claws (41), a control cylinder, a guide rail and a nut differential cylinder (8); the three fixed claws (41) have semicircular grooves on the outer sides to support and limit the inside when the fixed claws (41) contract the rubber O-ring (2), and the control cylinder can drive the fixed claws (41) to expand the rubber O-ring in the radial direction along the guide rail; the nut differential cylinder (8) can adjust the initial position of the fixed claws (41) according to the inner diameter of the rubber O-ring to support and contract rubber O-rings of different specifications; characterized in that including: adjusting the positions of the adjusting pins (31) on the contraction sliding mechanism (3) and the fixed claws (41) on the expansion sliding mechanism (4) according to the specifications of the rubber O-ring, so that the diameters of the three adjusting pins (31) are equal to the outer diameter of the rubber O-ring; controlling the rubber O-ring clamp (1) to clamp the rubber O-ring by using the mechanical arm, moving above the contraction sliding mechanism (3) and placing on the grooves of the three adjusting pins (31); driving the adjusting pins (31) to contract the rubber O-ring (2) by the control cylinder (6), and contracting to a diameter slightly smaller than the part hole of the installed rubber O-ring to ensure that it can be directly placed into the part hole of the installed rubber O-ring; The mechanical arm clamps the installed rubber O-ring part, moves the orifice of the installed rubber O-ring part to the top of the rubber O-ring (2), and controls the downward movement of the installed rubber O-ring part to move the installed rubber O-ring part installation position to the position of the rubber O-ring; The control cylinder (6) drives the adjustment nail (31) to move downward, so that the rubber O-ring is separated from the control of the adjustment nail (31), and the rubber O-ring automatically restores the original shape and enters the installed rubber O-ring part installation position; The fixed claw (41) pries open the rubber O-ring, and the rubber O-ring enters the installed rubber O-ring part installation position and automatically pops into the part inner groove; The mechanical arm controls the rotation of the part on the fixed support rod (7), so that the rubber O-ring is completely pried open in the installed rubber O-ring part; and finally the rubber O-ring is assembled to meet the use requirements.

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