An assembly device for irregularly shaped rubber sealing rings

Abstract

An assembly device for an irregularly shaped rubber sealing ring, wherein the irregularly shaped sealing ring includes an outwardly convex corner portion and an inwardly concave corner portion, and the assembly device includes a base plate and several ring-expanding mechanisms. These ring-expanding mechanisms are respectively positioned corresponding to the outwardly convex corner portion and the inwardly concave corner portion of the irregularly shaped sealing ring, and are detachably fixedly connected to the base plate. Each ring-expanding mechanism includes a mounting platform, a fixed arm, an adjusting arm, a hinge shaft, a first transmission chain, a second transmission chain, a first servo motor, and a second servo motor. The ring-expanding mechanism controls the rotation angle of the adjusting arm through the forward and reverse rotation of the second servo motor. The slope formed by the adjusting arm, the forward and reverse rotation of the first transmission chain around the annular groove, and the provided protrusions work together to partially engage the irregularly shaped sealing ring by utilizing the recess between the two protrusions. Then, the movement of the first transmission chain drives the irregularly shaped sealing ring to move towards the slope formed by the adjusting arm, thereby expanding the sealing ring.

Description

Technical Field

[0001] This invention relates to the field of sealing ring assembly technology, and more specifically to an assembly device for irregularly shaped rubber sealing rings. Background Technology

[0002] Rubber seals are widely used in machinery, automotive, aviation, and aerospace industries, primarily to prevent liquid and gas leakage and ensure the sealing performance of equipment. With advancements in industrial technology, the application range of rubber seals is expanding, while the performance requirements for these seals are becoming increasingly stringent.

[0003] Rubber sealing rings come in a wide variety of materials and designs, with varying physical properties such as hardness and elasticity. Different types of sealing rings present different challenges during assembly. Traditionally, rubber sealing ring assembly involves enlarging the outer diameter of the ring. However, for sealing rings with high hardness and poor elasticity, this enlargement process can easily subject them to excessive force, leading to excessive deformation, cracking, or even breakage, thus affecting the sealing effect and the product's lifespan.

[0004] Various types of seals are used in automotive parts. Some of these seals are designed with irregular shapes to fit the contours of the parts, and these irregularly shaped seals have different contours, lacking a design pattern. Current technology for these irregularly shaped seals relies solely on manual assembly, which easily leads to the aforementioned assembly problems and results in low assembly efficiency.

[0005] Therefore, it is necessary to design an assembly device that can adapt to different irregularly shaped sealing rings to address the contour variations of the sealing rings, thereby forming a uniform and stable sealing ring enlargement and pressing operation, ensuring that the irregularly shaped sealing rings are not damaged during the assembly process, and improving assembly efficiency. Summary of the Invention

[0006] To address the shortcomings of the aforementioned technologies, this invention provides an assembly device for irregularly shaped rubber sealing rings.

[0007] The technical solution of the present invention: an assembly device for an irregularly shaped rubber sealing ring, wherein the irregularly shaped sealing ring includes an outwardly convex corner portion and an inwardly concave corner portion, and the assembly device includes a base plate and a plurality of ring expanding mechanisms, wherein the plurality of ring expanding mechanisms are respectively arranged corresponding to the positions of each outwardly convex corner portion and inwardly concave corner portion of the irregularly shaped sealing ring, and are detachably fixedly connected to the base plate.

[0008] The expanding ring mechanism includes a mounting platform, a fixed arm, an adjusting arm, a hinge shaft, a first transmission chain, a second transmission chain, a first servo motor, and a second servo motor. The fixed arm includes a fixed end connected to the mounting platform and a first hinge joint disposed at the other end. The first hinge joint is provided with a first shaft hole. One end of the adjusting arm is provided with a hinge groove adapted to the first hinge joint, and the other end is provided with an arc portion. The hinge groove is coaxially provided with a second shaft hole corresponding to the first shaft hole, and the second shaft hole is provided with a keyway radially.

[0009] The fixed arm and the adjusting arm are provided with annular grooves along their length direction. The mounting platform is provided with a through groove that connects to the annular groove. One end of the first transmission chain is fitted into the annular groove of the fixed arm and the adjusting arm for sliding engagement, and the other end passes through the through groove. Several protrusions are provided at intervals on the outer surface of the first transmission chain on the side away from the fixed arm and the adjusting arm.

[0010] The hinge shaft includes an insertion part and a transmission part. The insertion part is provided with an optical shaft section passing through a first shaft hole and a synchronous section passing through a second shaft hole. The synchronous section is provided with a convex key that is adapted to the keyway and rotates synchronously. The transmission part extends axially to the outer side of the adjusting arm and is provided with a third sprocket.

[0011] The first servo motor and the second servo motor are fixedly mounted on the end face of the mounting platform facing away from the fixed arm. The first servo motor has a first sprocket on its output shaft. The first sprocket is engaged with the end of the first transmission chain that passes through the through groove and drives the first transmission chain to rotate forward or in reverse.

[0012] The second servo motor output shaft is provided with a second sprocket, the second transmission chain passes through the through slot and its two ends are respectively sleeved on the second sprocket and the third sprocket for meshing, and the second servo motor drives the adjusting arm to deflect forward or backward around the hinge shaft through the second transmission chain;

[0013] The first and second servo motors of the plurality of expanding ring mechanisms are linked by signals. Each second servo motor controls the adjusting arm to move toward or away from the irregular sealing ring. When the adjusting arm is close to the irregular sealing ring, it forms a slope relative to the fixed arm, and the irregular sealing ring is partially trapped between two bosses on the first transmission chain. Each first servo motor controls the first transmission chain to rotate forward or in reverse. The bosses drive the irregular sealing ring to move along the slope formed by the adjusting arm, thus forming a uniform radial expansion of the irregular sealing ring.

[0014] A further feature of the present invention is that spherical protrusions are symmetrically arranged on both sides of the arc portion of the adjusting arm, and these spherical protrusions serve as rounded corner contact supports for the outer convex corner portion and the inner concave corner portion of the irregular sealing ring.

[0015] A further feature of the present invention is that a plurality of first mounting holes are arranged at intervals on the base plate, and a plurality of mounting posts are arranged at intervals corresponding to the first mounting holes on the mounting platform. The mounting posts are provided with second mounting screw holes that are adapted to the first mounting holes. The base plate and the mounting seats of each expansion mechanism are detachably connected by screws.

[0016] A further feature of the present invention is that the assembly device also includes a robotic arm, which is detachably fixed to the base plate and drives the base plate to approach the irregular sealing ring. After each ring expansion mechanism lifts the irregular sealing ring, the base plate is driven to move to the assembly station, and each ring expansion mechanism drives the irregular sealing ring into the workpiece to be installed.

[0017] A further feature of the present invention is that a rubber pad is provided on the outer peripheral surface of the first transmission chain, and the side of the rubber pad in the width direction slides against the side wall of the annular groove. A plurality of protrusions are provided at intervals on the outer surface of the rubber pad away from the fixed arm and the adjusting arm.

[0018] The beneficial effects of this invention are as shown in the appendix to the specification. Figure 6-8 As shown, the expansion mechanism controls the rotation angle of the adjusting arm by the forward and reverse rotation of the second servo motor. The slope formed by the adjusting arm, the forward and reverse rotation of the first transmission chain around the annular groove, and the set bosses work together to use the recess between the two bosses to hold the irregular sealing ring in place. Then, the movement of the first transmission chain drives the irregular sealing ring to move towards the slope formed by the adjusting arm, thereby realizing the expansion of the sealing ring.

[0019] As per the instruction manual Figure 1-5 As shown, this device sets expansion mechanisms at the corresponding convex and concave corners of the irregular-shaped sealing ring and detachably fixes them to the base plate. It can reposition irregular-shaped sealing rings with different contours to form corresponding irregular-shaped sealing ring assembly devices. By using the signal linkage between the first servo motor and the second servo motor between multiple expansion mechanisms, the flip angle of the adjusting arm and the movement amplitude of the first transmission chain are uniformly and precisely controlled. This allows for numerical and precise control of the expansion amplitude of the irregular-shaped sealing ring, improving the assembly quality of the irregular-shaped sealing ring.

[0020] As per the instruction manual Figure 3 As shown, the expanding ring mechanism is set at the convex corner and the concave corner, and the contact support is provided by the designed ball head protrusion and the rounded corner, which improves the contact stability and requires only a minimum number of expanding ring mechanisms.

[0021] By combining the base plate with the robotic arm, and coordinating the signal data of the irregular sealing ring production line and the assembly tool production line, the assembly of irregular sealing rings can be automated. Attached Figure Description

[0022] Figure 1 The structure of this embodiment of the invention Figure 1 ;

[0023] Figure 2 The structure of this embodiment of the invention Figure 2 ;

[0024] Figure 3 The structure of this embodiment of the invention Figure 3 ;

[0025] Figure 4 The structure of this embodiment of the invention Figure 4 ;

[0026] Figure 5 The structure of this embodiment of the invention Figure 5 ;

[0027] Figure 6 The structure of this embodiment of the invention Figure 6 ;

[0028] Figure 7 The structure of this embodiment of the invention Figure 7 ;

[0029] Figure 8 The structure of this embodiment of the invention Figure 8 ;

[0030] The components include: 1. Irregularly shaped sealing ring; 11. Outwardly convex corner portion; 12. Inwardly concave corner portion; 2. Expanding ring mechanism; 21. Mounting platform; 211. Through groove; 212. Mounting post; 213. Second mounting screw hole; 22. Fixing arm; 221. First hinge joint; 222. First shaft hole; 23. Adjusting arm; 231. Hinge groove; 232. Arc portion; 233. Second shaft hole; 234. Keyway; 235. Ball head protrusion; 24. Hinge shaft; 24. Transmission part; 241. Optical shaft section; 242. Convex key; 243. First transmission chain; 25. Boss; 251. Second transmission chain; 26. First servo motor; 27. Second servo motor; 28. Annular groove; 29. ​​Base plate; 3. First mounting hole; 31.

[0031] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual size of the product. Furthermore, the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Detailed Implementation

[0032] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0033] The invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-7 As shown,

[0034] An assembly device for an irregularly shaped rubber sealing ring 1, wherein the irregularly shaped sealing ring 1 includes an outwardly convex corner portion 11 and an inwardly concave corner portion 12, and the assembly device includes a base plate 3 and a plurality of ring-expanding mechanisms 2, wherein the plurality of ring-expanding mechanisms 2 are respectively arranged corresponding to the positions of each outwardly convex corner portion 11 and inwardly concave corner portion 12 of the irregularly shaped sealing ring 1, and are detachably fixedly connected to the base plate 3.

[0035] The expanding ring mechanism 2 includes a mounting platform 21, a fixed arm 22, an adjusting arm 23, a hinge shaft 24, a first transmission chain 25, a second transmission chain 26, a first servo motor 27, and a second servo motor 28. The fixed arm 22 includes a fixed end connected to the mounting platform 21 and a first hinge joint 221 provided at the other end. The first hinge joint 221 is provided with a first shaft hole 222. One end of the adjusting arm 23 is provided with a hinge groove 231 adapted to the first hinge joint 221, and the other end is provided with an arc portion 232. The hinge groove 231 is coaxially provided with a second shaft hole 233 corresponding to the first shaft hole 222. The second shaft hole 233 is provided with a keyway 234 radially.

[0036] The fixed arm 22 and the adjusting arm 23 are provided with annular grooves 29 along their length direction. The mounting platform 21 is provided with a through groove 211 that connects to the annular grooves 29. One end of the first transmission chain 25 is fitted in the annular grooves 29 of the fixed arm 22 and the adjusting arm 23 for sliding engagement, and the other end passes through the through groove 211. Several bosses 251 are provided at intervals on the outer surface of the first transmission chain 25 on the side away from the fixed arm 22 and the adjusting arm 23.

[0037] The hinge shaft 24 includes an insertion part and a transmission part 241. The insertion part is provided with an optical shaft section 242 passing through the first shaft hole 222 and a synchronous section passing through the second shaft hole 233. The synchronous section is provided with a convex key 243 that is adapted to the keyway 234 and rotates synchronously. The transmission part 241 extends axially to the outer side of the adjusting arm 23 and is provided with a third sprocket.

[0038] The first servo motor 27 and the second servo motor 28 are fixedly mounted on the end face of the mounting platform 21 facing away from the fixed arm 22. The first servo motor 27 has a first sprocket on its output shaft. The first sprocket is engaged with the end of the first transmission chain 25 that passes through the through groove 211 and drives the first transmission chain 25 to rotate forward or in reverse.

[0039] The second servo motor 28 has a second sprocket on its output shaft. The second transmission chain 26 passes through the through slot 211 and its two ends are respectively fitted onto the second sprocket and the third sprocket for meshing. The second servo motor 28 drives the adjusting arm 23 to deflect forward or backward around the hinge shaft 24 through the second transmission chain 26.

[0040] The first servo motor 27 and the second servo motor 28 of the plurality of expanding ring mechanisms 2 are linked by signals. Each second servo motor 28 controls the adjusting arm 23 to move toward or away from the irregular sealing ring 1. When the adjusting arm 23 is close to and abuts the irregular sealing ring 1, it forms a slope relative to the fixed arm 22, and the irregular sealing ring 1 is partially trapped between the two bosses 251 on the first transmission chain 25. Each first servo motor 27 controls the first transmission chain 25 to rotate forward or reverse. The bosses 251 drive the irregular sealing ring 1 to move along the slope formed by the adjusting arm 23, forming a uniform radial expansion of the irregular sealing ring 1.

[0041] On both sides of the arc portion 232 of the adjusting arm 23, there are symmetrical ball head protrusions 235, which serve as rounded corner contact supports for the outer convex corner portion 11 and the inner concave corner portion 12 of the irregular sealing ring 1.

[0042] The base plate 3 has a plurality of first mounting holes 31 arranged at intervals. The mounting platform 21 has a plurality of mounting posts 212 arranged at intervals corresponding to the first mounting holes 31. The mounting posts 212 are provided with second mounting screw holes 213 that are adapted to the first mounting holes 31. The base plate 3 and the mounting seats of each expanding ring mechanism 2 are detachably connected by screws.

[0043] The assembly device also includes a robotic arm, which is detachably fixed to the base plate 3 and drives the base plate 3 to approach the irregular sealing ring 1. After each ring expansion mechanism 2 lifts the irregular sealing ring 1, the base plate 3 is driven to move to the assembly station, and each ring expansion mechanism 2 drives the irregular sealing ring 1 into the workpiece to be installed.

[0044] A rubber pad is provided on the outer peripheral surface of the first transmission chain 25. The side of the rubber pad in the width direction slides against the side wall of the annular groove 29. A number of protrusions 251 are provided at intervals on the outer surface of the rubber pad away from the fixed arm 22 and the adjusting arm 23.

[0045] The beneficial effects of this invention are as shown in the appendix to the specification. Figure 6-8 As shown, the expansion mechanism 2 controls the rotation angle of the adjusting arm 23 by the forward and reverse rotation of the second servo motor 28. The slope formed by the adjusting arm 23, the forward and reverse rotation of the first transmission chain 25 around the annular groove 29, and the set protrusions 251 work together to use the recess between the two protrusions 251 to hold the irregular sealing ring 1 in place. Then, the movement of the first transmission chain 25 drives the irregular sealing ring 1 to move towards the slope formed by the adjusting arm 23, thereby realizing the expansion of the sealing ring.

[0046] As per the instruction manual Figure 1-5 As shown, this device sets expansion mechanisms 2 at the corresponding positions of the convex corners 11 and concave corners 12 of the irregular-shaped sealing ring 1, and makes a detachable fixed connection with the base plate 3. It can reposition the irregular-shaped sealing ring 1 with different contours to form a corresponding irregular-shaped sealing ring 1 assembly device. By using the signal linkage between the first servo motor 27 and the second servo motor 28 between multiple expansion mechanisms 2, the flip angle of the adjusting arm 23 and the movement amplitude of the first transmission chain 25 are uniformly and precisely controlled, thereby numerically and precisely controlling the expansion amplitude of the irregular-shaped sealing ring 1 and improving the assembly quality of the irregular-shaped sealing ring 1.

[0047] As per the instruction manual Figure 3 As shown, the expanding ring mechanism 2 is set at the outer convex corner 11 and the inner concave corner 12, and the designed ball head protrusion 235 is used to contact and support the rounded corner, which improves the contact stability and requires only a minimum number of expanding ring mechanisms 2.

[0048] By combining the base plate 3 with the robotic arm, and coordinating the signal data of the irregular sealing ring 1 production line and the assembly tool production line, the assembly of the irregular sealing ring 1 can be automated.

[0049] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. An assembly device for irregularly shaped rubber sealing rings, characterized in that: The irregular sealing ring includes an outwardly convex corner portion and an inwardly concave corner portion. The assembly device includes a base plate and several expansion mechanisms. These several expansion mechanisms are respectively set at the positions of each outwardly convex corner portion and inwardly concave corner portion of the irregular sealing ring and are detachably fixedly connected to the base plate. The expanding ring mechanism includes a mounting platform, a fixed arm, an adjusting arm, a hinge shaft, a first transmission chain, a second transmission chain, a first servo motor, and a second servo motor. The fixed arm includes a fixed end connected to the mounting platform and a first hinge joint disposed at the other end. The first hinge joint is provided with a first shaft hole. One end of the adjusting arm is provided with a hinge groove adapted to the first hinge joint, and the other end is provided with an arc portion. The hinge groove is coaxially provided with a second shaft hole corresponding to the first shaft hole, and the second shaft hole is provided with a keyway radially. The fixed arm and the adjusting arm are provided with annular grooves along their length direction. The mounting platform is provided with a through groove that connects to the annular groove. One end of the first transmission chain is fitted into the annular groove of the fixed arm and the adjusting arm for sliding engagement, and the other end passes through the through groove. Several protrusions are provided at intervals on the outer surface of the first transmission chain on the side away from the fixed arm and the adjusting arm. The hinge shaft includes an insertion part and a transmission part. The insertion part is provided with an optical shaft section passing through a first shaft hole and a synchronous section passing through a second shaft hole. The synchronous section is provided with a convex key that is adapted to the keyway and rotates synchronously. The transmission part extends axially to the outer side of the adjusting arm and is provided with a third sprocket. The first servo motor and the second servo motor are fixedly mounted on the end face of the mounting platform facing away from the fixed arm. The first servo motor has a first sprocket on its output shaft. The first sprocket is engaged with the end of the first transmission chain that passes through the through groove and drives the first transmission chain to rotate forward or in reverse. The second servo motor output shaft is provided with a second sprocket, the second transmission chain passes through the through slot and its two ends are respectively sleeved on the second sprocket and the third sprocket for meshing, and the second servo motor drives the adjusting arm to deflect forward or backward around the hinge shaft through the second transmission chain; The first and second servo motors of the plurality of expanding ring mechanisms are linked by signals. Each second servo motor controls the adjusting arm to move toward or away from the irregular sealing ring. When the adjusting arm is close to the irregular sealing ring, it forms a slope relative to the fixed arm, and the irregular sealing ring is partially trapped between two bosses on the first transmission chain. Each first servo motor controls the first transmission chain to rotate forward or in reverse. The bosses drive the irregular sealing ring to move along the slope formed by the adjusting arm, thus forming a uniform radial expansion of the irregular sealing ring.

2. The assembly device for an irregularly shaped rubber sealing ring according to claim 1, characterized in that: On both sides of the arc portion of the adjusting arm, there are symmetrical ball head protrusions, which serve as rounded corner contact supports for the outer convex corner and inner concave corner of the irregular sealing ring.

3. The assembly device for an irregularly shaped rubber sealing ring according to claim 1 or 2, characterized in that: The base plate is provided with a plurality of first mounting holes arranged at intervals. The mounting platform is provided with a plurality of mounting posts at intervals corresponding to the first mounting holes. The mounting posts are provided with second mounting screw holes that are adapted to the first mounting holes. The base plate and the mounting seats of each expansion mechanism are detachably connected by screws.

4. The assembly device for an irregularly shaped rubber sealing ring according to claim 3, characterized in that: The assembly device also includes a robotic arm, which is detachably fixed to the base plate and drives the base plate to approach the irregular sealing ring. After each ring expansion mechanism lifts the irregular sealing ring, the base plate is driven to move to the assembly station, and each ring expansion mechanism drives the irregular sealing ring into the workpiece to be installed.

5. The assembly device for an irregularly shaped rubber sealing ring according to claim 4, characterized in that: A rubber pad is provided on the outer peripheral surface of the first transmission chain. The side of the rubber pad in the width direction slides against the side wall of the annular groove. Several protrusions are provided at intervals on the outer surface of the rubber pad away from the fixed arm and the adjusting arm.

Images