A sealed connection joint for servo hydraulic cylinders

Abstract

This utility model relates to the field of hydraulic cylinder equipment technology, and in particular to a sealed connection joint for a servo hydraulic cylinder. It includes a hydraulic cylinder body, a connecting lug on one side of the cylinder body, a piston rod movably fitted on the opposite side of the cylinder body relative to the connecting lug, a hinge seat mounted on the free end of the piston rod outside the cylinder body, and an oil pipe connection mechanism penetrating the side wall of the cylinder body. A hydraulic pipe mechanism is movably fitted on the inner wall of the oil pipe connection mechanism. This device can be used to connect hydraulic oil pipes of a hydraulic cylinder, ensuring a sealed connection while also enabling quick assembly and disassembly of the hydraulic oil pipes. This ensures a stable connection of the hydraulic oil pipes, enabling use in various scenarios for servo hydraulic cylinders, achieving stable hydraulic oil transmission, reducing the risk of hydraulic oil leakage, and achieving a sealed connection between the oil pipe joint and the hydraulic oil pipe without the need for additional tools.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder equipment technology, and specifically to a sealed connection joint for servo hydraulic cylinders. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, has no transmission backlash, and provides smooth movement. Therefore, it is widely used in the hydraulic systems of various machines. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a cushioning device, and a venting device.

[0003] Chinese utility model patent with announcement number CN215444603U discloses an automatically positioning hydraulic cylinder connector, which includes "connecting pipes symmetrically arranged on the upper ends of the left and right sides of the hydraulic cylinder, and a connecting plate arranged on the left end of the hydraulic cylinder away from the connector"; however, the connecting pipe of this device should be a connector of a high-pressure hydraulic oil pipe, but its connecting pipe does not have the function of quick connection and ensuring sealing. Summary of the Invention

[0004] The purpose of this invention is to provide a sealed connection joint for servo hydraulic cylinders to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sealed connection joint for a servo hydraulic cylinder, comprising a hydraulic cylinder body, a connecting lug plate on one side of the hydraulic cylinder body, a piston rod movably sleeved on the opposite side of the hydraulic cylinder body about the connecting lug plate, a hinge seat installed on the free end of the piston rod outside the hydraulic cylinder body, an oil pipe connection mechanism penetrating through the side wall of the hydraulic cylinder body, and a hydraulic pipe mechanism movably sleeved on the inner wall of the oil pipe connection mechanism; The oil pipe connection mechanism includes a connecting pipe, a limiting sleeve fitted on the outer wall of the connecting pipe, several grooves distributed in a ring around the bottom of the connecting pipe relative to the bottom of the limiting sleeve, a slider distributed in a ring around the bottom of the limiting sleeve, a first spring located at the top of the slider in the groove, the other end of the first spring being fixedly connected to the inner top wall of the groove, a rubber ring on the top inner wall of the connecting pipe, and an insert block distributed in a ring around the top of the limiting sleeve. A rotating shaft is located on the side of the insert block away from the center of the connecting pipe, a retaining plate is movably fitted on the outer wall of the rotating shaft, a second spring is located on the inner wall of the retaining plate, and the other end of the second spring is fixedly connected to the opposite side of the insert block.

[0006] The beneficial effects of this utility model are as follows: with the combination of connecting pipe, limiting sleeve, sliding groove, slider, first spring, rubber ring, insert block, rotating shaft, clamping plate and second spring, the oil pipe connector and high pressure oil pipe can be quickly disassembled and assembled, and good sealing performance can be guaranteed.

[0007] To achieve a tight connection between the high-pressure oil pipe and the oil pipe connector: The hydraulic pipe mechanism is further configured such that: the hydraulic pipe body includes a hydraulic pipe body, and the outer wall of the hydraulic pipe body is provided with a limiting ring, and the top of the limiting ring is provided with a number of slots distributed in a ring.

[0008] By adopting the above technical solution, the high-pressure oil pipe and the oil pipe connector are tightly sealed together.

[0009] To achieve sealing and limiting of the connection between the limiting sleeve and the high-pressure oil pipe: The slide is further configured such that the slide groove, the slider, and the first spring constitute a sliding structure, and the central axis of the slide groove is aligned with the central axis of the connecting pipe, and the slider and the first spring move along the central axis of the slide groove.

[0010] By adopting the above technical solution, the sealing and limiting of the connector and the high-pressure oil pipe by the limiting sleeve can be achieved.

[0011] To achieve a stable connection between the connector and the high-pressure oil pipe: The configuration is further defined as follows: the rotating shaft, the clamping plate, and the second spring constitute a rotating structure, and the rotation direction of the clamping plate around the rotating shaft is perpendicular to the central axis of the connecting pipe.

[0012] By adopting the above technical solution, a stable connection between the connector and the high-pressure oil pipe can be achieved.

[0013] To ensure a stable connection and limiting between the connector and the high-pressure oil pipe, the clamping plate can be used. The design further includes: the size of the insert block matches the inner diameter of the slot, and when the second spring is not compressed, the length of the card plate is greater than the length of the slot, and the bottom of the card plate overlaps with the top of the limiting sleeve.

[0014] By adopting the above technical solution, a stable limiting connection between the connector and the high-pressure oil pipe can be achieved.

[0015] To achieve a sealed connection between the high-pressure oil pipe and the connector using a rubber ring: A further configuration is made whereby the inner wall of the rubber ring is movably fitted with the outer wall of the hydraulic pipe.

[0016] By adopting the above technical solution, a sealed connection between the high-pressure oil pipe and the connector is achieved.

[0017] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main body of this utility model; Figure 2 This is a schematic diagram of the oil pipe connection mechanism of this utility model; Figure 3 This is a partial cross-sectional view of the oil pipe connection mechanism of this utility model; Figure 4 This is a top front view of the oil pipe connection mechanism of this utility model; Figure 5 This is a schematic diagram of the hydraulic pipe mechanism of this utility model.

[0019] In the diagram: 1. Hydraulic cylinder body; 2. Connecting ear plate; 3. Piston rod; 4. Hinge seat; 5. Oil pipe connection mechanism; 501. Connecting pipe; 502. Limiting sleeve; 503. Slide groove; 504. Slider; 505. First spring; 506. Rubber ring; 507. Insert block; 508. Rotating shaft; 509. Clamping plate; 510. Second spring; 6. Hydraulic pipe mechanism; 601. Hydraulic pipe body; 602. Limiting ring; 603. Slot. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0021] See Figures 1 to 5 A sealed connection joint for a servo hydraulic cylinder includes a hydraulic cylinder body 1, a connecting lug 2 on one side of the hydraulic cylinder body 1, a piston rod 3 movably sleeved on the opposite side of the hydraulic cylinder body 1 about the connecting lug 2, a hinge seat 4 installed on the free end of the piston rod 3 located outside the hydraulic cylinder body 1, an oil pipe connection mechanism 5 penetrating through the side wall of the hydraulic cylinder body 1, and a hydraulic pipe mechanism 6 movably sleeved on the inner wall of the oil pipe connection mechanism 5. The oil pipe connection mechanism 5 includes a connecting pipe 501. A limiting sleeve 502 is fitted on the outer wall of the connecting pipe 501. Several sliding grooves 503 are distributed in a ring around the bottom of the connecting pipe 501 and the limiting sleeve 502. A slider 504 is distributed in a ring around the bottom of the limiting sleeve 502. A first spring 505 is provided at the top of the slider 504 located in the sliding groove 503. The other end of the first spring 505 is fixedly connected to the inner top wall of the sliding groove 503. A rubber ring 506 is provided on the top inner wall of the connecting pipe 501. An insert block 507 is distributed in a ring around the top of the limiting sleeve 502. A rotating shaft 508 is provided on the side of the insert block 507 away from the center of the connecting pipe 501. A retaining plate 509 is movably fitted on the outer wall of the rotating shaft 508. A second spring 510 is provided on the inner wall of the retaining plate 509. The other end of the second spring 510 is fixedly connected to the opposite side of the insert block 507.

[0022] In this embodiment, as Figure 5As shown, the hydraulic pipe mechanism 6 includes a hydraulic pipe body 601, and the outer wall of the hydraulic pipe body 601 is provided with a limiting ring 602, and the top of the limiting ring 602 is provided with a plurality of slots 603.

[0023] In this embodiment, as Figure 2 and Figure 3 As shown, the slide groove 503, the slider 504 and the first spring 505 constitute a sliding structure, and the central axis of the slide groove 503 is aligned with the central axis of the connecting pipe 501. The slider 504 and the first spring 505 move along the central axis of the slide groove 503.

[0024] In this embodiment, as Figure 4 As shown, the rotating shaft 508, the clamping plate 509, and the second spring 510 constitute a rotating structure, and the rotation direction of the clamping plate 509 around the rotating shaft 508 is perpendicular to the central axis of the connecting pipe 501.

[0025] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the size of the insert 507 matches the inner diameter of the slot 603, and when the second spring 510 is not compressed, the length of the card plate 509 is greater than the length of the slot 603, and the bottom of the card plate 509 overlaps with the top of the limiting sleeve 502.

[0026] In this embodiment, as Figure 2 As shown, the inner wall of the rubber ring 506 is movably connected to the outer wall of the hydraulic pipe 601.

[0027] The sealed connection joint used for servo hydraulic cylinders operates as follows: First, the limiting ring 602 of the hydraulic pipe body 601 is inserted into the connecting pipe 501. The rubber ring 506 (model: Sunray YS-2100) undergoes elastic deformation under the compression of the hydraulic pipe body 601. The elastic force generated by the deformation of the rubber ring 506 (model: Sunray YS-2100) tightly wraps the hydraulic pipe body 601, thereby enhancing the sealing performance. The limiting sleeve 502 is moved along the multiple grooves 503 distributed in a ring, so that the limiting sleeve 502 wraps around the hydraulic pipe body 601, and the top insert 507 passes through the slot 603. The second spring 510 drives the clamping plate 509 to rotate around the rotating shaft 508, so that the clamping plate 509 and the second spring 510 connect the hydraulic pipe body 601 and the connecting pipe 501. At the same time, the slider 504 moves along the groove 503 and compresses the first spring 505.

[0028] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A sealed connection joint for a servo hydraulic cylinder, comprising a hydraulic cylinder body (1), characterized in that: A connecting lug (2) is provided on one side of the hydraulic cylinder (1), and a piston rod (3) is movably sleeved on the opposite side of the hydraulic cylinder (1) about the connecting lug (2). A hinge seat (4) is installed on the free end of the piston rod (3) located outside the hydraulic cylinder (1). An oil pipe connection mechanism (5) is provided through the side wall of the hydraulic cylinder (1), and a hydraulic pipe mechanism (6) is movably sleeved on the inner wall of the oil pipe connection mechanism (5). The oil pipe connection mechanism (5) includes a connecting pipe (501), a limiting sleeve (502) is fitted on the outer wall of the connecting pipe (501), and a plurality of sliding grooves (503) are distributed in a ring at the relative positions of the outer wall of the connecting pipe (501) and the bottom of the limiting sleeve (502). A slider (504) is distributed in a ring at the bottom of the limiting sleeve (502). A first spring (505) is provided at the top of the slider (504) located at the position of the sliding groove (503), and the other end of the first spring (505) is fixedly connected to the sliding groove. The inner top wall of (503) and the inner top wall of the connecting pipe (501) are provided with rubber rings (506). The top of the limiting sleeve (502) is provided with inserts (507) in a ring. The inserts (507) are provided with a rotating shaft (508) on the side away from the center of the connecting pipe (501). The outer wall of the rotating shaft (508) is provided with a retaining plate (509). The inner wall of the retaining plate (509) is provided with a second spring (510). The other end of the second spring (510) is fixedly connected to the opposite side of the inserts (507).

2. A sealed connection joint for a servo hydraulic cylinder as described in claim 1, characterized in that: The hydraulic pipe mechanism (6) includes a hydraulic pipe body (601), and the outer wall of the hydraulic pipe body (601) is provided with a limiting ring (602), and the top of the limiting ring (602) is provided with a number of slots (603).

3. A sealed connection joint for a servo hydraulic cylinder as described in claim 1, characterized in that: The slide groove (503), slider (504) and first spring (505) constitute a sliding structure, and the central axis of the slide groove (503) is aligned with the central axis of the connecting pipe (501). The slider (504) and the first spring (505) move along the central axis of the slide groove (503).

4. A sealed connection joint for a servo hydraulic cylinder as described in claim 1, characterized in that: The rotating shaft (508), the clamping plate (509), and the second spring (510) constitute a rotating structure, and the rotation direction of the clamping plate (509) around the rotating shaft (508) is perpendicular to the central axis of the connecting pipe (501).

5. A sealed connection joint for a servo hydraulic cylinder as described in claim 1, characterized in that: The size of the insert (507) matches the inner diameter of the slot (603), and when the second spring (510) is not compressed, the length of the card plate (509) is greater than the length of the slot (603), and the bottom of the card plate (509) overlaps with the top of the limiting sleeve (502).

6. A sealed connection joint for a servo hydraulic cylinder as described in claim 1, characterized in that: The inner wall of the rubber ring (506) is movably sleeved with the outer wall of the hydraulic pipe (601).

Images