Double-piston-rod hydraulic cylinder for hydraulic basketball stand

Abstract

The invention provides a double-piston-rod hydraulic cylinder for a hydraulic basketball stand, which relates to the technical field of hydraulic elements and comprises a piston cylinder body, piston rods, a sealing end cover and a double-piston assembly. By designing the piston cylinder body, the piston rod, the sealing end cover and the double-piston assembly and specifically designing the double-piston assembly, the first annular piston and the second annular piston are oppositely pulled to extrude the two ends of the double-flange annular sleeve piece through the oppositely-pulling piece, so that the first annular piston and the end part of the double-flange annular sleeve piece form a sealing contact surface; the second annular piston and the other end part of the double-flange annular sleeve also form a sealing contact surface, so that stable and reliable sealing connection is formed; in the downward pressing process of the piston cylinder body, the pressure of hydraulic oil above the double-piston assembly is increased, the second annular piston is extruded to be attached to the top end face of the double-flange annular sleeve piece, the formed sealing structure is very stable, along with the increase of the pressure, the sealing characteristic of the sealing structure is better, and the sealing structure is outstanding in the aspects of durability and safety.

Description

Technical Field

[0001] The present invention belongs to high-pressure and large-flow hydraulic components and hydraulic systems, and specifically relates to the technical field of hydraulic components. It is a double-rod hydraulic cylinder for a hydraulic basketball hoop. Background Art

[0002] Hydraulic drive systems are widely used in the lifting and adjusting mechanisms of competitive sports equipment due to their high power density and precise controllability. In the field of professional basketball hoops, as the core power unit, the hydraulic cylinder needs to meet strict requirements such as frequent lifting, resistance to impact loads, and long-term maintenance-free operation.

[0003] Currently, the mainstream design uses a single-rod hydraulic cylinder, which drives the lifting of the basketball hoop through the unidirectional movement of the piston rod and relies on the hydraulic circuit to buffer the impact energy. Although such a structure has basic functions, its asymmetric cavity design leads to inherent defects in the system, making it difficult to meet the requirements for motion smoothness, durability, and safety in high-intensity competitive scenarios. Therefore, the present invention provides a double-rod hydraulic cylinder for a hydraulic basketball hoop. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a double-rod hydraulic cylinder for a hydraulic basketball hoop, which solves the problem that the single-rod hydraulic cylinder cannot meet the requirements for motion smoothness, durability, and safety during the use of the basketball hoop.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] A double-rod hydraulic cylinder for a hydraulic basketball hoop, comprising:

[0007] A piston cylinder block, with sealing end covers fixedly installed at both ends of the piston cylinder block. At both ends of the piston cylinder block, near the sides of the piston cylinder block, there are inlet / outlet interfaces provided.

[0008] A piston rod, which is arranged inside the piston cylinder block, and both ends of the piston rod penetrate through the two sealing end covers respectively. Inside the piston cylinder block, on the side of the piston rod, there is a double-piston assembly fixedly installed.

[0009] The double-piston assembly includes:

[0010] A double-flange annular kit, with an annular groove provided on the side of the piston rod, and the double-flange annular kit is stuck inside the annular groove.

[0011] A first annular piston and a second annular piston, both of which are sleeved on the side of the piston rod, and the first annular piston and the second annular piston are located at both ends of the double-flange annular kit. Between the first annular piston and the second annular piston, there are several tension members arranged in an annular array.

[0012] Preferably, the double-flange annular kit includes:

[0013] An annular body, a first flange is fixedly connected to the top end of the annular body, a second flange is fixedly connected to the bottom end of the annular body, both the first flange and the second flange extend outward, and a second stepped opening is formed at the bottom of the second flange, and a sealing ring is arranged inside the second stepped opening;

[0014] The top end of the first annular piston is located inside the second stepped opening, and the bottom end of the second annular piston corresponds to the top end of the first flange.

[0015] Preferably, a first sealing sleeve is arranged outside the first annular piston, and a second sealing sleeve is arranged outside the second annular piston.

[0016] Preferably, the double-flange annular kit is formed by splicing a first half-annular body and a second half-annular body, and a welded copper sleeve is sleeved outside the first half-annular body and the second half-annular body.

[0017] Preferably, the tension member includes: a column body, several jacks are formed on the side surface of the column body, a first threaded column and a second threaded column are respectively fixedly connected to both ends of the column body, and the thread directions of the first threaded column and the second threaded column are opposite.

[0018] Preferably, a buffer assembly is arranged inside the piston cylinder body and close to the end position of the piston cylinder body, and the buffer assembly is located outside the oil inlet / outlet interface on the piston cylinder body.

[0019] Preferably, the buffer assembly includes:

[0020] A buffer ring, a first stepped opening is formed inside the piston cylinder body, the buffer ring is installed inside the first stepped opening, an external sealing sleeve is installed outside the buffer ring, an internal sealing sleeve is formed inside the buffer ring, and an annular protrusion is fixedly connected to the bottom end of the buffer ring;

[0021] A spring, the spring is arranged between the top end of the buffer ring and the sealing end cover;

[0022] A communication hole is formed at the end of the buffer ring.

[0023] Preferably, mounting brackets are fixedly installed at both ends of the piston rod, discharge holes are formed on the mounting brackets, and a backboard is fixedly installed outside the piston cylinder body.

[0024] Preferably, a metal sealing sleeve and a rubber sealing sleeve are arranged between the piston rod and the sealing end cover.

[0025] Preferably, the gap between the first annular piston and the second annular piston is 25-30 mm.

[0026] The present invention provides a double-rod hydraulic cylinder for a hydraulic basketball stand, having the following beneficial effects:

[0027] 1. In the present invention, by designing a piston cylinder block, a piston rod, a sealing end cover and a double-piston assembly, and specifically designing the double-piston assembly, the first annular piston and the second annular piston are pulled and squeezed against both ends of a double-flange annular kit by a tension member, so that a sealing contact surface is formed between the first annular piston and the end of the double-flange annular kit, and a sealing contact surface is also formed between the second annular piston and the other end of the double-flange annular kit, forming a stable and reliable sealing connection; during the downward pressing process of the piston cylinder block, the pressure of the hydraulic oil above the double-piston assembly increases, squeezing the second annular piston to fit against the top end face of the double-flange annular kit, forming a very stable sealing structure, and with the increase of the above pressure, its sealing characteristics will be better, showing outstanding performance in terms of durability and safety.

[0028] 2. In the present invention, by designing a double-flange annular kit, the first flange and the second flange at both ends thereof can form a squeezing sealing contact surface with the first annular piston and the second annular piston, and the formed squeezing sealing contact has a better sealing effect with the increase of pressure, and can show better stability, durability and safety when being impacted or affected by external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a perspective view of a double-rod hydraulic cylinder for a hydraulic basketball stand proposed by the present invention;

[0030] Figure 2 is a cross-sectional view of a double-rod hydraulic cylinder for a hydraulic basketball stand proposed by the present invention;

[0031] Figure 3 is Figure 2 a partial enlarged view at A in

[0032] Figure 4 is Figure 2 a partial enlarged view at B in

[0033] Figure 5 is Figure 3 a partial enlarged view at C in

[0034] Figure 6 is an installation schematic diagram of the piston rod and the piston of a double-rod hydraulic cylinder for a hydraulic basketball stand proposed by the present invention;

[0035] Figure 7 is a perspective schematic diagram of a double-flange annular kit of a double-rod hydraulic cylinder for a hydraulic basketball stand proposed by the present invention;

[0036] Figure 8A three-dimensional schematic diagram of a tension member of a double-piston-rod hydraulic cylinder for a hydraulic basketball hoop proposed by the present invention;

[0037] Figure 9 A schematic diagram of the use of a double-piston-rod hydraulic cylinder for a hydraulic basketball hoop proposed by the present invention.

[0038] Among them, 1. Piston rod; 101. Annular groove; 2. Piston cylinder block; 201. First step opening; 3. Sealing end cover; 4. Inlet / outlet interface; 5. Double piston assembly; 501. Double flange annular kit; 501a. First half ring body; 501b. Second half ring body; 50101. Ring body; 50102. First flange; 50103. Second flange; 50104. Second step opening; 50105. Sealing ring; 502. First annular piston; 502a. First sealing sleeve; 503. Second annular piston; 503a. Second sealing sleeve; 504. Tension member; 504a. Cylinder; 504b. First threaded column; 504c. Second threaded column; 504d. Insertion hole; 505. Welded copper sleeve; 6. Buffer assembly; 601. Buffer ring; 602. Annular protrusion; 603. External sealing sleeve; 604. Communication hole; 605. Internal sealing sleeve; 606. Spring; 7. Backboard; 8. Mounting bracket; 9. Double piston rod hydraulic cylinder. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment 1:

[0041] As Figures 1 - 9 shown, the embodiment of the present invention provides a double-piston-rod hydraulic cylinder for a hydraulic basketball hoop, which is a high-pressure and large-flow hydraulic component and a hydraulic component in a hydraulic system, and is used to drive the backboard 7 of the basketball hoop to move up and down to meet different types of usage requirements. And during the use process, it can keep the piston cylinder block 2 in a stable state, and play a role in buffering and protecting the impact energy during extreme operations such as hurdling of the basketball hoop. Specifically, it includes: piston cylinder block 2, piston rod 1, sealing end cover 3 and double piston assembly 5.

[0042] Sealing end caps 3 are fixedly installed at both ends of the piston cylinder block 2. The sealing end caps 3 are installed on the piston cylinder block 2 by means of threads. Oil inlet / outlet interfaces 4 are arranged on the side of the piston cylinder block 2 and close to both ends of the piston cylinder block 2. The two oil inlet / outlet interfaces 4 are connected to the oil supply and return system. The piston rod 1 is arranged inside the piston cylinder block 2, and both ends of the piston rod 1 penetrate through the two sealing end caps 3 respectively. A double piston assembly 5 is fixedly installed on the side of the piston rod 1 and inside the piston cylinder block 2. The double piston assembly 5 divides the inside of the piston cylinder block 2 into two oil chamber regions on the left and right. The two oil inlet / outlet interfaces 4 correspond to the above-mentioned left and right oil chamber regions.

[0043] One of the oil inlet / outlet interfaces supplies oil into the oil chamber region. The pressure in this oil chamber region increases, pushing the double piston assembly 5 and causing the double piston assembly 5 and the piston rod 1 to move. The hydraulic oil in the other oil chamber region is squeezed out of the other oil inlet / outlet interface, realizing the driving operation of the double piston assembly 5 and the piston rod 1. When in actual use, as Figure 9 shown in the figure, both ends of the piston rod 1 of the double piston rod hydraulic cylinder 9 are fixed, and the backboard 7 is fixedly installed on the piston cylinder block 2 of the double piston rod hydraulic cylinder 9. The piston cylinder block 2 of the double piston rod hydraulic cylinder 9 maintains a fixed state by relying on the internal hydraulic oil. When the backboard 7 is impacted by an external force, the acting force is transmitted to the piston cylinder block 2 of the double piston rod hydraulic cylinder 9. The piston cylinder block 2 of the double piston rod hydraulic cylinder 9 slides relative to the piston rod 1 to compress the oil chamber region located below. In order to ensure the stability, safety and durability of the double piston assembly 5 during the process of compressing the oil chamber region located below, the double piston assembly 5 is designed as follows, which includes: a double flange annular kit 501, a first annular piston 502, a second annular piston 503, and a tension member 504.

[0044] An annular groove 101 is formed on the side surface of the piston rod 1. The double-flange annular kit 501 is stuck inside the annular groove 101. The first annular piston 502 and the second annular piston 503 are both sleeved on the side surface of the piston rod 1, and the first annular piston 502 and the second annular piston 503 are located at both ends of the double-flange annular kit 501. Generally, the gap between the first annular piston 502 and the second annular piston 503 is 25 - 30 mm. A number of tension members 504 distributed in an annular array are installed between the first annular piston 502 and the second annular piston 503. In this solution, the first annular piston 502 and the second annular piston 503 are tensioned and pressed against both ends of the double-flange annular kit 501 by the tension members 504, so that a sealed contact surface is formed between the end of the first annular piston 502 and the double-flange annular kit 501, and a sealed contact surface is also formed between the other end of the second annular piston 503 and the double-flange annular kit 501, forming a stable and reliable sealed connection. For example, when the piston cylinder body 2 is subjected to a downward pressure, the piston cylinder body 2 moves downward relative to the double-piston assembly 5, squeezing the oil cavity area above the double-piston assembly 5. Since the hydraulic oil has certain compression characteristics, it can buffer the above-mentioned force. And during the downward pressing process, the pressure of the hydraulic oil above the double-piston assembly 5 increases, squeezing the second annular piston 503 to fit against the top end face of the double-flange annular kit 501. The formed sealing structure is very stable, and with the increase of the above-mentioned pressure, its sealing performance will be better, showing outstanding performance in terms of durability and safety.

[0045] In one embodiment, the double-flange annular kit 501 includes: a ring body 50101, a first flange 50102, a second flange 50103, and a sealing ring 50105.

[0046] The top end of the ring body 50101 is fixedly connected to the first flange 50102, and the bottom end of the ring body 50101 is fixedly connected to the second flange 50103. Both the first flange 50102 and the second flange 50103 extend outward. And a second step opening 50104 is formed at the bottom of the second flange 50103. A sealing ring 50105 is arranged inside the second step opening 50104. The top end of the first annular piston 502 is located inside the second step opening 50104. The top end of the first annular piston 502 forms a first sealed contact with the end of the second step opening 50104, and the side surface of the first annular piston 502 forms a second sealed contact with the side surface of the second step opening 50104. And the elastic sealing ring 50105 can increase the sealing performance at the corner of the first sealed contact and the second sealed contact. The bottom end of the second annular piston 503 corresponds to the top end of the first flange 50102, and the bottom end of the second annular piston 503 also forms a squeezing sealed contact with the top end of the first flange 50102.

[0047] By designing the double-flange annular kit 501, the first flange 50102 and the second flange 50103 at both ends thereof can form an extrusion sealing contact surface with the first annular piston 502 and the second annular piston 503, and the formed extrusion sealing contact has a better sealing effect as the pressure increases. When subjected to impacts and external forces, it can exhibit better stability, durability, and safety.

[0048] In one embodiment, a first sealing sleeve 502a is arranged on the outer side of the first annular piston 502, and the first sealing sleeve 502a is used to increase the sealing performance between the first annular piston 502 and the inner wall of the piston cylinder block 2. A second sealing sleeve 503a is arranged on the outer side of the second annular piston 503, and the second sealing sleeve 503a is used to increase the sealing performance between the second annular piston 503 and the inner wall of the piston cylinder block 2.

[0049] In one embodiment, the double-flange annular kit 501 is formed by splicing a first half-ring body 501a and a second half-ring body 501b. A welded copper sleeve 505 is sleeved on the outer sides of the first half-ring body 501a and the second half-ring body 501b. The first half-ring body 501a and the second half-ring body 501b are fixed by a clamping method from both sides, and then the welded copper sleeve 505 is formed into a circle and welded and fixed into an annular shape to prevent the first half-ring body 501a and the second half-ring body 501b from separating.

[0050] In one embodiment, the tension member 504 includes: a column body 504a, several jacks 504d are arranged on the side surface of the column body 504a, and a first threaded column 504b and a second threaded column 504c are respectively and fixedly connected to both ends of the column body 504a, and the thread directions of the first threaded column 504b and the second threaded column 504c are opposite.

[0051] By inserting a rod-shaped handle into the jack 504d to manipulate the rotation of the column body 504a, thereby driving the rotation of the first threaded column 504b and the second threaded column 504c. The first threaded column 504b and the second threaded column 504c are respectively threadedly connected to the first annular piston 502 and the second annular piston 503, and the thread directions of the first threaded column 504b and the second threaded column 504c are opposite. During the rotation process, the tension member 504 drives the first annular piston 502 and the second annular piston 503 to move closer.

[0052] In one embodiment, a buffer assembly 6 is arranged inside the piston cylinder block 2 and near the end of the piston cylinder block 2. The buffer assembly 6 is located outside the inlet / outlet interface 4 on the piston cylinder block 2, and the buffer assembly 6 is used to prevent the end of the piston cylinder block 2 from colliding with the double-piston assembly 5.

[0053] In one embodiment, the buffer assembly 6 includes: a buffer ring 601 and a spring 606. A first stepped opening 201 is formed inside the piston cylinder block 2. The buffer ring 601 is installed inside the first stepped opening 201. An external seal sleeve 603 is installed on the outer side of the buffer ring 601. An internal seal sleeve 605 is formed inside the buffer ring 601. A ring-shaped protrusion 602 is fixedly connected to the bottom end of the buffer ring 601. The spring 606 is disposed between the top end of the buffer ring 601 and the seal end cover 3. A communication hole 604 is formed at the end of the buffer ring 601.

[0054] As Figure 4 shown in the figure, the buffer assembly 6 isolates an upper inner chamber of the piston cylinder block 2. This chamber communicates with the lower chamber through a plurality of annularly distributed communication holes 604. Under the action of the spring 606, the bottom end of the buffer ring 601 abuts against the inner side of the first stepped opening 201. At this time, the surface of the buffer ring 601 exposed at the top is larger than the surface at the bottom of the buffer ring 601. After the double piston assembly 5 passes over the inlet / outlet interface 4, the hydraulic oil inside the piston cylinder block 2 and in the area above the inlet / outlet interface 4 will not flow out, forming a first barrier to prevent the double piston assembly 5 from moving upward continuously. As the double piston assembly 5 moves upward (relative to the piston cylinder block 2), the pressure of the hydraulic oil in the area above the inlet / outlet interface 4 increases. Under the action of the area difference between the upper and lower surfaces of the buffer ring 601, the buffer ring 601 has a downward pressure to bear the impact of the double piston assembly 5 and ensure the buffering effect.

[0055] To ensure the buffering effect, buffer assemblies 6 are provided at both ends of the piston cylinder block 2, which ensure that the double piston assembly 5 has a buffering effect when it moves to both ends of the piston cylinder block 2.

[0056] In one embodiment, mounting brackets 8 are fixedly installed at both ends of the piston rod 1. Drain holes are formed in the mounting brackets 8. A backboard 7 is fixedly installed on the outer side of the piston cylinder block 2. A set of screws is used to fix the mounting brackets 8 to keep the piston rod 1 fixed.

[0057] In one embodiment, a metal seal sleeve and a rubber seal sleeve are provided between the piston rod 1 and the seal end cover 3. Both the metal seal sleeve and the rubber seal sleeve are used to increase the sealing performance between the piston rod 1 and the seal end cover 3.

[0058] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double piston rod hydraulic cylinder for a hydraulic basketball stand, comprising: A piston cylinder body (2), wherein sealing end covers (3) are fixedly mounted on both ends of the piston cylinder body (2), and oil inlet / outlet interfaces (4) are arranged on the sides of the piston cylinder body (2) and near the two ends of the piston cylinder body (2); It is characterized by further comprising: A piston rod (1), the piston rod (1) being arranged on the inner side of a piston cylinder body (2), and the two ends of the piston rod (1) respectively pass through two sealing end covers (3), and a double piston assembly (5) is fixedly installed on the side of the piston rod (1) and located on the inner side of the piston cylinder body (2); The dual piston assembly (5) comprises: A double-flange annular set (501), wherein an annular groove (101) is provided on the side of the piston rod (1), and the double-flange annular set (501) is clamped on the inner side of the annular groove (101); A first annular piston (502) and a second annular piston (503), wherein the first annular piston (502) and the second annular piston (503) are both sleeved on the side of the piston rod (1), and the first annular piston (502) and the second annular piston (503) are located at both ends of a double flange annular kit (501), and a plurality of tension members (504) distributed in an annular array are installed between the first annular piston (502) and the second annular piston (503).

2. A double piston rod hydraulic cylinder for a hydraulic basketball stand according to claim 1, characterized in that: The double flange annular kit (501) comprises: A ring body (50101), wherein the top end of the ring body (50101) is fixedly connected to a first flange (50102), and the bottom end of the ring body (50101) is fixedly connected to a second flange (50103), the first flange (50102) and the second flange (50103) both extend outward, and a second step opening (50104) is provided at the bottom of the second flange (50103), and a sealing ring (50105) is provided inside the second step opening (50104); The top end of the first annular piston (502) is located on the inner side of the second step opening (50104), and the bottom end of the second annular piston (503) corresponds to the top end of the first flange (50102).

3. The double piston rod hydraulic cylinder for a hydraulic basketball stand according to claim 2, characterized in that: A first sealing sleeve (502a) is disposed on the outer side of the first annular piston (502), and a second sealing sleeve (503a) is disposed on the outer side of the second annular piston (503).

4. The double piston rod hydraulic cylinder for a hydraulic basketball stand according to claim 2, characterized in that: The double flange annular set (501) is composed of a first half ring body (501a) and a second half ring body (501b) assembled together, and the outer sides of the first half ring body (501a) and the second half ring body (501b) are sleeved with welded copper sleeves (505).

5. The double piston rod hydraulic cylinder for a hydraulic basketball stand according to claim 1, characterized in that: The tensioning member (504) comprises: a column (504a), a side surface of which is provided with a plurality of insertion holes (504d), and two ends of the column (504a) are respectively fixedly connected with a first threaded column (504b) and a second threaded column (504c), and the thread directions of the first threaded column (504b) and the second threaded column (504c) are opposite.

6. The double piston rod hydraulic cylinder for a hydraulic basketball stand according to claim 1, characterized in that: A buffer component (6) is provided inside the piston cylinder body (2) and close to the end of the piston cylinder body (2); the buffer component (6) is located outside the oil inlet / outlet interface (4) on the piston cylinder body (2).

7. A double piston rod hydraulic cylinder for a hydraulic basketball stand according to claim 6, characterized in that: The buffer component (6) comprises: A buffer ring (601), wherein a first step opening (201) is provided on the inner side of the piston cylinder body (2), the buffer ring (601) is installed on the inner side of the first step opening (201), an outer sealing sleeve (603) is installed on the outer side of the buffer ring (601), an inner sealing sleeve (605) is provided on the inner side of the buffer ring (601), and an annular protrusion (602) is fixedly connected to the bottom end of the buffer ring (601); A spring (606), wherein the spring (606) is arranged between the top end of the buffer ring (601) and the sealing end cover (3); A communicating hole (604) is provided at the end of the buffer ring (601).

8. The double piston rod hydraulic cylinder for a hydraulic basketball stand according to claim 1, characterized in that: Both ends of the piston rod (1) are fixedly mounted with mounting frames (8), the mounting frames (8) are provided with rows of holes, and a backboard (7) is fixedly mounted on the outer side of the piston cylinder body (2).

9. The double piston rod hydraulic cylinder for a hydraulic basketball stand according to claim 1, characterized in that: A metal sealing sleeve and a rubber sealing sleeve are provided between the piston rod (1) and the sealing end cover (3).

10. The double piston rod hydraulic cylinder for a hydraulic basketball stand according to claim 1, characterized in that: The gap between the first annular piston (502) and the second annular piston (503) is 25-30 mm.

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