Hydraulic robot synchronous servo control hydraulic cylinder

Abstract

This invention relates to a synchronous servo control hydraulic cylinder for a hydraulic robot, comprising a cylinder body, a guide sleeve at one end of the cylinder body, and a rear end cover at the other end. A piston and piston rod are housed within the cylinder body, with the piston embedded in the piston rod. A valve block is mounted on the cylinder body, with its two ends connected to the cylinder body via a first oil pipe and a second oil pipe, respectively. The valve block has two hydraulically controlled check valves connected to the first and second oil pipes, respectively. A cylinder body protrusion is located at one end of the cylinder body with the guide sleeve, and the protrusion matches the groove edge of the guide sleeve. The sealing performance of the cylinder body is enhanced through the cooperation of various sealing components, ensuring the consistency of the oil chamber volume of each hydraulic cylinder, ensuring synchronous oil supply to each hydraulic cylinder, improving the displacement accuracy of each hydraulic cylinder, and achieving precision production. The upper and lower heat-conducting pillars and cooling section improve the heat dissipation performance of the hydraulic cylinder and extend its service life.

Description

Technical Field

[0001] This invention relates to a hydraulic cylinder, and more particularly to a hydraulic cylinder for synchronous servo control of a hydraulic robot. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and provides smooth movement, thus finding wide application in the hydraulic systems of various machines. When machining certain workpieces, multiple hydraulic cylinders need to operate simultaneously to complete the task. This places high demands on the consistency of the hydraulic cylinders' movements. However, existing hydraulic cylinders, due to machining accuracy and sealing issues, cannot achieve synchronized operation of multiple cylinders. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a synchronous servo control hydraulic cylinder for hydraulic robots.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a hydraulic cylinder for synchronous servo control of a hydraulic robot, including a cylinder body, a guide sleeve provided at one end of the cylinder body, and a rear end cover provided at the other end. A piston and a piston rod are provided inside the cylinder body, the piston is embedded in the piston rod, a valve block is provided on the cylinder body, and the two ends of the valve block are connected to the cylinder body through a first oil pipe and a second oil pipe, respectively. Two hydraulic control check valves are provided on the valve block and are respectively connected to the first oil pipe and the second oil pipe. A cylinder body protrusion is provided at one end of the cylinder body with the guide sleeve, and the cylinder body protrusion matches the groove edge of the guide sleeve.

[0005] In one embodiment of the present invention, the cylinder protrusion is a semi-circular ring.

[0006] In one embodiment of the present invention, an ear ring is provided at one end of the cylinder body with a guide sleeve, and a self-lubricating spherical bearing is provided at one end of the cylinder body with a rear end cover. A dustproof ring, an O-ring, a shaft ring, a step seal, and a shaft guide ring are sequentially provided between the rod body and the inner wall of the guide sleeve from the end with the ear ring to the end with the self-lubricating spherical bearing. An O-ring and an O-ring retainer are provided between the guide sleeve and the inner wall of the rod body, and a combined sealing ring is provided between the piston and the inner wall of the cylinder body.

[0007] In one embodiment of the present invention, the first oil pipe and the second oil pipe are respectively connected to the cylinder body through a welded hinged pipe joint, and the first oil pipe and the second oil pipe are also connected to the valve block through a welded end straight pipe joint; a combined sealing ring is provided between the welded hinged pipe joint and the cylinder body, and a combined sealing ring is also provided between the welded end straight pipe joint and the valve block.

[0008] In one embodiment of the present invention, sensor mounting bases are provided at both ends of the cylinder.

[0009] In one embodiment of the present invention, an upper heat-conducting column and a lower heat-conducting column are provided between the inner wall and the outer wall of the cylinder, and the upper heat-conducting column and the lower heat-conducting column extend out of the outer wall respectively. The upper heat-conducting column is located at the upper part of the cylinder, and the lower heat-conducting column is located at the lower part of the cylinder.

[0010] In one embodiment of the present invention, a cooling section is fixedly provided between the upper heat-conducting column and the lower heat-conducting column extending from the outer wall. The cooling section includes a heat-conducting plate and a cooling cavity connected to each other. Coolant is provided in the cooling cavity. One side of the heat-conducting plate is a curved surface that matches the outer wall of the cylinder, and the heat-conducting plate is provided with a plurality of cooling protrusions extending toward the cooling cavity.

[0011] In one embodiment of the present invention, a plurality of connecting posts are arranged sequentially from top to bottom between the inner wall and the outer wall of the cylinder, the connecting posts are matched with the cooling protrusions, and the connecting posts are made of copper.

[0012] In one embodiment of the present invention, the cooling protrusion is semi-circular, and a gap is left between adjacent cooling protrusions.

[0013] In one embodiment of the present invention, the connecting column is composed of a first vertical rod, a first horizontal rod, and a second vertical rod. The first vertical rod and the second vertical rod are both vertically arranged. The two ends of the first horizontal rod are respectively horizontally connected to the first vertical rod and the second vertical rod. One end of the first vertical rod is connected to a heat-conducting plate, and one end of the second vertical rod is connected to the inner wall of the cylinder.

[0014] The beneficial effects of this invention are: the invention has good sealing performance, and the sealing performance of the rod body is enhanced by the cooperation of various sealing components, ensuring the consistency of the oil chamber volume of each hydraulic cylinder, ensuring the synchronous oil supply of each hydraulic cylinder, improving the displacement accuracy of each hydraulic cylinder, and realizing precision production; the setting of upper and lower heat-conducting columns and cooling parts improves the heat dissipation performance of the hydraulic cylinder and extends the service life of the hydraulic cylinder. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 1 ;

[0016] Figure 2 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 2 ;

[0017] Figure 3 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 3 ;

[0018] Figure 4 yes Figure 3Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0020] Figure 6 This is a schematic diagram of the cooling protrusion structure in Embodiment 2 of the present invention;

[0021] Figure 7 This is a schematic diagram of the connecting column structure in Embodiment 2 of the present invention;

[0022] Figure 8 This is a schematic diagram of the structure of Embodiment 3 of the present invention. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Example 1:

[0026] like Figures 1 to 4The hydraulic cylinder for synchronous servo control of a hydraulic robot shown includes a cylinder body 1. A guide sleeve 2 is provided at one end of the cylinder body 1, and a rear end cover 3 is provided at the other end. A piston 4 and a piston rod 5 are provided inside the cylinder body 1. The piston 4 is embedded in the piston rod 5. A valve block 6 is provided on the cylinder body 1. The two ends of the valve block 6 are connected to the cylinder body 1 through a first oil pipe 7 and a second oil pipe 8, respectively. Two hydraulically controlled check valves 601 are provided on the valve block 6, which are respectively connected to the first oil pipe 7 and the second oil pipe 8. A cylinder body protrusion 101 is provided at one end of the cylinder body 1 with the guide sleeve 2. The cylinder body protrusion 101 matches the groove edge of the guide sleeve 2. The cylinder body protrusion 101 is semi-circular to avoid damage to the guide sleeve. At the same time, the cylinder body protrusion effectively prevents the guide sleeve from loosening, thereby ensuring the sealing of the cylinder body.

[0027] The piston is embedded in the piston rod, which enhances the integrity of the piston and piston rod, reduces the gap between the piston and piston rod, and increases the accuracy of the piston rod driving the piston to move. The matching of the cylinder body protrusion 101 and the guide sleeve 2 further enhances the sealing of the cylinder body, ensures the uniformity of the oil chamber volume, ensures the displacement of the piston rod, ensures the accuracy of the hydraulic cylinder's operation, and facilitates the precision production of the hydraulic cylinder.

[0028] A lug 9 is provided at one end of the cylinder body 1 with a guide sleeve 2, and a self-lubricating spherical bearing 10 is provided at one end of the cylinder body 1 with a rear end cover 3. A dustproof ring 11, an O-ring 12, a shaft ring 13, a step seal 14, and a shaft guide ring 15 are sequentially provided between the rod body 1 and the inner wall of the guide sleeve 2 from the end with the lug 9 to the end with the self-lubricating spherical bearing 10. An O-ring 12 and an O-ring retainer are provided between the guide sleeve 2 and the inner wall of the rod body 1. A combined sealing ring 16 is provided between the piston 4 and the inner wall of the cylinder body 1.

[0029] The first oil pipe 7 and the second oil pipe 8 are connected to the cylinder body 1 via welded hinged pipe joints 17. The first oil pipe 7 and the second oil pipe 8 are also connected to the valve block 6 via welded straight-through pipe joints 18. A combined sealing ring is provided between the welded hinged pipe joint 17 and the cylinder body, and a combined sealing ring is also provided between the welded straight-through pipe joint 18 and the valve block 6. Sensor mounting seats 19 are provided at both ends of the cylinder body 1 to facilitate sensor fixing and enable more precise displacement of the hydraulic cylinder.

[0030] By using various sealing rings, the sealing performance inside the rod body is enhanced, ensuring that the oil chamber volume of multiple hydraulic cylinders operating simultaneously is consistent, improving the accuracy of synchronous action of multiple hydraulic cylinders, and facilitating the automation and precision machining of the product.

[0031] Example 2:

[0032] like Figures 5 to 7As shown, an upper heat-conducting column 20 and a lower heat-conducting column 21 are provided between the inner and outer walls of the cylinder body 1, and the upper heat-conducting column 20 and the lower heat-conducting column 21 extend out of the outer wall respectively. The upper heat-conducting column 20 is located at the upper part of the cylinder body 1, and the lower heat-conducting column 21 is located at the lower part of the cylinder body 1. The heat generated inside the hydraulic cylinder due to the reciprocating motion of the piston rod is dissipated through the upper and lower heat-conducting columns, thereby improving the heat dissipation performance of the hydraulic cylinder, ensuring the stability of the normal operation of the hydraulic cylinder, and extending the service life of the hydraulic cylinder.

[0033] A cooling section is fixedly provided between the upper heat-conducting column 20 and the lower heat-conducting column 21 extending from the outer wall. The cooling section includes a heat-conducting plate 22 and a cooling cavity 23 connected to each other. Coolant is provided in the cooling cavity 23. One side of the heat-conducting plate 22 is a curved surface that matches the outer wall of the cylinder body, and the heat-conducting plate 22 is provided with multiple cooling protrusions 24 extending towards the cooling cavity. The upper and lower heat-conducting columns serve to fix the cooling section. The heat generated inside the cylinder body 1 due to the reciprocating motion of the piston rod is conducted to the heat-conducting plate and then further conducted to the cooling protrusions. Heat dissipation is achieved through the cooling protrusions. In order to improve the heat dissipation effect, the cooling protrusions 24 are semi-circular. The semi-circular cooling protrusions increase the heat dissipation angle and heat dissipation area, which can radiate and dissipate the heat. A heat dissipation gap is left between adjacent cooling protrusions 24.

[0034] Multiple connecting posts 25 are arranged sequentially from top to bottom between the inner and outer walls of the cylinder 1. The connecting posts 25 are matched with the cooling protrusions 24 and are made of copper. The heat on the inner wall of the cylinder is conducted to the outer wall through the connecting posts, thereby improving the heat conduction efficiency.

[0035] Example 3:

[0036] like Figure 8 As shown, the connecting column 25 consists of a first vertical rod 2501, a first horizontal rod 2503, and a second vertical rod 2502. Both the first vertical rod 2501 and the second vertical rod 2502 are vertically arranged. The two ends of the first horizontal rod 2503 are horizontally connected to the first vertical rod 2501 and the second vertical rod 2502, respectively. Preferably, the two ends of the first horizontal rod 2503 are connected to the center positions of the first and second vertical rods, increasing the stability of the connecting column. One end of the first vertical rod 2501 is connected to the heat-conducting plate 22. One end of the second vertical rod 2502 is connected to the inner wall of the cylinder body 1. The first vertical rod 2501 is in direct contact with the heat-conducting plate 22, and the second vertical rod 2502 is in direct contact with the inner wall of the cylinder body 1. The vertically arranged first vertical rod 2501 maximizes the heat conduction area with the heat-conducting plate, and the second vertical rod 2502 maximizes the heat conduction area with the inner wall of the cylinder body 1. This increases the overall heat conduction area of ​​the connecting column, improves heat conduction efficiency, minimizes the temperature inside the cylinder, and extends the service life of the hydraulic cylinder.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A hydraulic robot synchronous servo control hydraulic cylinder, characterized by, The cylinder includes a cylinder body, a guide sleeve at one end of the cylinder body and a rear end cap at the other end of the cylinder body. A piston and a piston rod are provided inside the cylinder body. The piston is embedded in the piston rod. A valve block is provided on the cylinder body. The two ends of the valve block are connected to the cylinder body through a first oil pipe and a second oil pipe, respectively. The valve block is provided with two hydraulically controlled check valves that are connected to the first oil pipe and the second oil pipe, respectively. A cylinder body protrusion is provided on one end of the cylinder body with the guide sleeve. The cylinder body protrusion matches the groove edge of the guide sleeve. An upper heat-conducting column and a lower heat-conducting column are provided between the inner wall and the outer wall of the cylinder body, and the upper heat-conducting column and the lower heat-conducting column extend out of the outer wall respectively. The upper heat-conducting column is located at the upper part of the cylinder body, and the lower heat-conducting column is located at the lower part of the cylinder body. A cooling section is fixedly provided between the upper and lower heat-conducting columns extending from the outer wall. The cooling section includes a heat-conducting plate and a cooling cavity connected to each other. Coolant is provided in the cooling cavity. One side of the heat-conducting plate is a curved surface that matches the outer wall of the cylinder, and the heat-conducting plate is provided with multiple cooling protrusions extending towards the cooling cavity. The cylinder body has multiple connecting posts arranged sequentially from top to bottom between its inner and outer walls. The connecting posts are matched with cooling protrusions and are made of copper. The connecting column consists of a first vertical rod, a first horizontal rod, and a second vertical rod. Both the first and second vertical rods are vertically arranged. The two ends of the first horizontal rod are respectively horizontally connected to the first and second vertical rods. One end of the first vertical rod is connected to a heat-conducting plate, and one end of the second vertical rod is connected to the inner wall of the cylinder.

2. The hydraulic robot synchronous servo control cylinder of claim 1, wherein, The cylinder body protrusion is a semi-circular ring.

3. The hydraulic robot servo-controlled cylinder of claim 1, wherein, The cylinder body with a guide sleeve has an ear ring at one end, and the cylinder body with a rear end cover has a self-lubricating spherical bearing at one end. From the end with the ear ring to the end with the self-lubricating spherical bearing, the cylinder body and the inner wall of the guide sleeve are sequentially provided with a dust ring, an O-ring, a shaft ring, a step seal, and a shaft guide ring. The guide sleeve and the inner wall of the cylinder body are provided with an O-ring and an O-ring retainer. The piston and the inner wall of the cylinder body are provided with a combined sealing ring.

4. The hydraulic robot synchronous servo control cylinder according to claim 1 or 2, characterized in that, The first oil pipe and the second oil pipe are respectively connected to the cylinder body through welded hinged pipe joints. The first oil pipe and the second oil pipe are also connected to the valve block through welded end straight pipe joints. A combined sealing ring is provided between the welded hinged pipe joint and the cylinder body, and a combined sealing ring is also provided between the welded end straight pipe joint and the valve block.

5. The hydraulic robot servo-controlled cylinder of claim 3, wherein, Sensor mounting brackets are provided at both ends of the cylinder.

6. The hydraulic robot servo-controlled cylinder of claim 1, wherein, The cooling protrusions are semi-circular, and there is a gap between adjacent cooling protrusions.

Images