A device for small o-ring assembly

Abstract

This utility model belongs to the field of improving the assembly quality of aviation products, specifically relating to a device for assembling small O-rings. It includes: two rotating plates, two first rods, a second rod, a third rod, a first handle, a second handle, and two third handles. The rotating plates are provided with square holes and round holes; the first and second handles are both L-shaped; the ends of the two third handles are respectively connected to one end of the first and second handles; one end of the third rod passes through the round holes of the two rotating plates; the other ends of the first and second handles are provided with square bosses near their ends; the square holes of the two rotating plates fit onto the square bosses of the first and second handles; one end of the third rod and the other end of the second handle are respectively connected to one end of the corresponding first rod; the other end of the first handle is connected to one end of the second rod.

Description

Technical Field

[0001] This utility model belongs to the field of improving the assembly quality of aviation products, and specifically relates to a device for assembling small O-rings. Background Technology

[0002] Hydraulic cylinders are widely used in the field of construction machinery. Their application is closely related to seals, with sealing rings being a common type, which isolate the oil and prevent leakage. If the surface of the sealing ring is damaged during installation, oil leakage will occur.

[0003] like Figure 1 As shown, a certain valve body requires an O-ring seal to seal the oil. The O-ring mounting groove is located inside the valve body. The outer diameter A of the O-ring is 7.5mm, while the valve body mounting hole diameter B is only 7mm. To install the seal, the fluoroplastic O-ring needs to be shaped to reduce its outer diameter before it can be inserted into the valve body. If it is manually squeezed in and then inserted into the mounting groove along the valve body mounting hole, the 7.5mm outer diameter O-ring may break due to friction from the valve body mounting hole, causing oil leakage. A device is needed to shape the O-ring to a size smaller than the valve body mounting hole diameter, maintain this size, and install it into the sealing ring mounting groove without friction against the mounting hole wall, thus avoiding damage and facilitating assembly. Utility Model Content

[0004] Purpose of the utility model: To provide a device for assembling small O-rings.

[0005] Technical solution:

[0006] A device for assembling small O-rings includes: two rotating plates 1, two first rods 2, a second rod 3, a third rod 4, a first handle 5, a second handle 6, and two third handles 7. The rotating plates 1 are provided with square holes and round holes; the first handles 5 and second handles 6 are both L-shaped; the ends of the two third handles 7 are respectively connected to one end of the first handle 5 and the second handle 6; one end of the third rod 4 passes through the round holes of the two rotating plates 1; the other ends of the first handles 5 and the second handles 6 are provided with square bosses near their ends; the square holes of the two rotating plates 1 are fitted onto the square bosses of the first handles 5 and the second handles 6; one end of the third rod 4 and the other end of the second handle 6 are respectively connected to one end of the corresponding first rod 2; the other end of the first handle 5 is connected to one end of the second rod 3.

[0007] Furthermore, the length of the square bosses of the first handle 5 and the second handle 6 is the same as the thickness of the hole above the rotating plate 1.

[0008] Furthermore, the ends of the two third handles 7 are threadedly connected to one end of the first handle 5 and the second handle 6, respectively.

[0009] Furthermore, the hole spacing L between the round hole and the square hole of the rotating plate 1 is determined according to the size of the O-ring 8 and the size of the mounting hole of the valve body 9.

[0010] Furthermore, for the O-ring 8 with a diameter of 7mm, the diameters of the first rod 2 and the second rod 3 are 2mm.

[0011] Furthermore, one end of the third lever 4 and the other end of the second handle 6 are respectively connected to one end of the corresponding first lever 2 by thread; the other end of the first handle 5 is connected to one end of the second lever 3 by thread.

[0012] Beneficial effects:

[0013] By using the device for assembling small O-rings according to this utility model, the O-rings are prevented from breaking due to friction. It is also easy to operate, convenient to install, and has low manufacturing cost. Attached Figure Description

[0014] Figure 1 Axial and sectional view of the O-ring and valve body;

[0015] Figure 2 This is an axonometric view of a device for assembling small O-rings according to the present invention;

[0016] Figure 3 This is a cross-sectional view of the first handle side of a device for assembling small O-rings according to the present invention.

[0017] Figure 4 This is a cross-sectional view of the second handle side of a device for assembling small O-rings according to the present invention.

[0018] Figure 5 This is a cross-sectional view of the second handle of a device for assembling small O-rings according to the present invention.

[0019] Figure 6 This is a cross-sectional view of the first handle of a device for assembling small O-rings according to the present invention.

[0020] Figure 7 This is a top view and a cross-sectional view of the rotating plate of a device for assembling small O-rings according to the present invention.

[0021] Figure 8 This is an axonometric view of the first handle (second handle) of a device for assembling small O-rings according to the present invention.

[0022] Figure 9 This is a cross-sectional view and an axonometric view of the third rod of a device for assembling small O-rings according to the present invention.

[0023] Wherein: 1-rotating plate; 2-first lever; 3-second lever; 4-third lever; 5-first handle; 6-second handle; 7-third handle; 8-O-ring; 9-valve body. Detailed Implementation

[0024] like Figures 2-9 A device for assembling small O-rings includes: two rotating plates 1, two first rods 2, a second rod 3, a third rod 4, a first handle 5, a second handle 6, and two third handles 7. The rotating plates 1 are provided with square holes and round holes; the first handles 5 and the second handles 6 are both L-shaped; the ends of the two third handles 7 are respectively connected to one end of the first handle 5 and the second handle 6; one end of the third rod 4 passes through the round holes of the two rotating plates 1; the other ends of the first handles 5 and the second handles 6 are provided with square bosses near their ends; the square holes of the two rotating plates 1 are fitted onto the square bosses of the first handles 5 and the second handles 6; one end of the third rod 4 and the other end of the second handle 6 are respectively connected to one end of the corresponding first rod 2; the other end of the first handle 5 is connected to one end of the second rod 3.

[0025] In one possible embodiment, the length of the square bosses of the first handle 5 and the second handle 6 is the same as the thickness of the hole above the rotating plate 1. This ensures that when the third handle 7 is rotated, the rod connected to it, the rotating plate 1, the first handle 5, or the second handle 6 can move synchronously to achieve shaping.

[0026] In one possible embodiment, the ends of the two third handles 7 are threadedly connected to one end of the first handle 5 and the second handle 6, respectively. The front ends of the first handle 5 and the second handle 6 are threaded cylinders, and the bottom of the cylinders is a square boss. The length of the boss is the same as the thickness of the rotating plate 1, so as to achieve clearance fit with the rotating plate 1.

[0027] In one possible embodiment, the hole spacing L between the round hole and the square hole of the rotating plate 1 is determined according to the size of the O-ring 8 and the size of the mounting hole of the valve body 9.

[0028] The hole spacing L between the round hole and the square hole of the rotating plate 1 can be changed as needed to install the O-ring and the corresponding valve body 9 mounting hole size. With other accessories remaining unchanged, only the rotating plate 1 with different hole spacing L can be replaced to achieve the shaping and installation of O-rings of various sizes, which has strong versatility.

[0029] In one possible embodiment, for an O-ring 8 with a diameter of 7 mm, the diameters of the first rod 2 and the second rod 3 are 2 mm. The diameters of the first rod 2 and the second rod 3 are only 2 mm, and their lengths are only 8 mm. The small size can support a small hole spacing L between the round and square holes of the rotating plate 1, so as to achieve the shaping of the O-ring with a diameter of only 7 mm.

[0030] The second rod 3, which remains in the same position during the shaping process, has an outer diameter of 2mm, and the diameter of the circular hole of the rotating piece 1 is 1.8mm, thus limiting the size of the rotating piece 1.

[0031] In one possible embodiment, one end of the third rod 4 and the other end of the second handle 6 are respectively threaded to one end of the corresponding first rod 2; the other end of the first handle 5 is threaded to one end of the second rod 3.

[0032] Both the first rod 2 and the second rod 3 have internal threaded holes. After the rotating piece 1 is installed on the third rod 4, the first handle 5, and the second handle 6, the internal threaded holes of the first rod 2 and the second rod 3 can be screwed into the corresponding external threads of the first handle 5, the second handle 6, and the third rod 4. The installation can be completed without changing the direction of the rotating piece 1, and the installation is very convenient.

[0033] The third handle 7 has an internal threaded hole, while the second handle 6 and the first handle 5 have external threaded holes at their ends. After the installation of the first rod 2, the second rod 3, the rotating plate 1, the first handle 5, and the second handle 6 is completed, the third handle 7 can be directly screwed into the corresponding external thread at the rear end of the first handle 5 and the second handle 6. The rotating plate 1 will not rotate during the installation process, making the installation very convenient.

[0034] like Figure 9 The third rod 4 is a stepped rod structure. The outer diameter F of the cylinder at its front end is equal to the diameter A of the circular hole of the rotating piece 1. The front end has an external thread of length D to enable the installation of the second rod 3. The outer diameter of the cylinder of length C is the same as the thickness of the two rotating pieces 1. While enabling the connection with the second rod 3 through the thread, it also serves to fix the rotating piece 1.

[0035] In practical applications, different O-rings and valve bodies 9 have different dimensions. Corresponding O-ring assembly devices can be designed according to different structures and dimensions. By modifying the length and diameter of the first rod 2 and the second rod 3, and the distance and corresponding dimensions of the square and round holes of the rotating plate 1, the assembly of O-rings and valve bodies 9 of different sizes can be achieved.

[0036] The installation process is as follows: The third handle 7 is installed with the first handle 5 and the second handle 6 through internal and external threads. After installation, the round holes of the two rotating pieces 1 are fitted onto the smaller diameter front cylinder of the third rod 4. Then, the square holes of the two rotating pieces 1 are fitted onto the square bosses at the front ends of the first handle 5 and the second handle 6. After installation, the first rod 2 is installed at the front ends of the third rod 4 and the second handle 6 through their external threads. The second rod 3 is installed through the external thread of the first handle 5. The device is now installed. Figure 1 For the O-ring 8 that needs to be installed, and the corresponding valve body 9 with the internal sealing ring mounting groove.

[0037] The usage process is as follows:

[0038] First, place the O-ring onto the first rod 2 and the second rod 3, which are connected to the first handle 5 and the second handle 6. Hold the third handle 7 and rotate the third handle 7 connected to the second handle 6 clockwise, while simultaneously rotating the third handle 7 connected to the first handle 5 counterclockwise. When the third handles 7 on both sides rotate nearly 180°, the second rod 3 connected to the third rod 4 remains in a fixed position throughout the shaping process. The second rod 3 fixes the upper end of the O-ring 8, while the second rods 3 on both sides and the first rod 2, as the third handle 7 rotates, hold the O-ring 8 in place. The O-ring is shaped into a heart shape. At this point, the maximum outer diameter of the O-ring 8 is smaller than the diameter of the mounting hole in the valve body 9. The third handle 7 is moved axially along the mounting hole in the valve body 9 to move the O-ring to the mounting groove. Then, the third handles 7 on both sides are rotated in the opposite direction to the shaping process. At this point, the size of the O-ring is restored to the size before shaping. This achieves an integrated assembly of an O-ring with an outer diameter of 7.5mm into the mounting groove in the valve body 9 with a mounting hole diameter of only 7mm. This avoids the O-ring from being broken by friction, and the operation is simple, the installation is convenient, and the manufacturing cost is low.

Claims

1. A device for assembling small O-rings, characterized in that, include: Two rotating plates (1), two first rods (2), a second rod (3), a third rod (4), a first handle (5), a second handle (6), and two third handles (7), among which, The rotating plate (1) is provided with square holes and round holes; the first handle (5) and the second handle (6) are both L-shaped; the ends of the two third handles (7) are respectively connected to one end of the first handle (5) and the second handle (6); one end of the third rod (4) passes through the round holes of the two rotating plates (1); the other ends of the first handle (5) and the second handle (6) are provided with square bosses near the end position; the square holes of the two rotating plates (1) are fitted onto the square bosses of the first handle (5) and the second handle (6); one end of the third rod (4) and the other end of the second handle (6) are respectively connected to one end of the corresponding first rod (2); the other end of the first handle (5) is connected to one end of the second rod (3).

2. The apparatus according to claim 1, characterized in that, The length of the square bosses of the first handle (5) and the second handle (6) is the same as the thickness of the hole above the rotating piece (1).

3. The apparatus according to claim 1, characterized in that, The ends of the two third handles (7) are threaded to one end of the first handle (5) and the second handle (6), respectively.

4. The apparatus according to claim 1, characterized in that, The hole spacing L between the round hole and the square hole of the rotating plate (1) is determined according to the size of the O-ring (8) and the size of the mounting hole of the valve body (9).

5. The apparatus according to claim 1, characterized in that, For an O-ring (8) with a diameter of 7 mm, the diameters of the first rod (2) and the second rod (3) are 2 mm.

6. The apparatus according to claim 1, characterized in that, One end of the third rod (4) and the other end of the second handle (6) are respectively connected to one end of the corresponding first rod (2) by thread; the other end of the first handle (5) is connected to one end of the second rod (3) by thread.

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