Pilot oil source valve damper

Abstract

The patent discloses a kind of shock absorber of pilot oil source valve, including valve body and connecting pipeline, the inside right side wall of valve body is fixedly installed with spring, the left end of spring is fixedly installed with throttle plug, the middle part of throttle plug is equipped with throttle hole, the upper and lower ends of the side wall of throttle plug are equipped with installation slot, wheel is connected in installation slot by pivot, the upper and lower ends of the inner side wall of valve body are equipped with wheel groove, wheel body edge of wheel is rollingly installed in wheel groove, the upper and lower sides of the present scheme are equipped with wheel in throttle plug, can be installed in the wheel groove of the inner side wall of valve body by wheel rolling, to further limit the moving track of throttle plug, avoid throttle plug to contact the inner side wall of valve body when moving left and right, and the compression ring of connecting pipeline inner end is positioned by limiting piece, make compression ring linearly compress on rubber ring, avoid causing the wrinkle of sealing surface on rubber ring, guarantee sealing effect, avoid oil leakage.

Description

Technical Field

[0001] This patent relates to the field of shock absorption device technology, specifically a pilot oil source valve shock absorption device. Background Technology

[0002] Pilot valve vibration damping devices are auxiliary devices for hydraulic systems adapted to pilot valves, commonly found in the hydraulic circuits of construction machinery such as excavators. Their core function is to mitigate hydraulic shocks and vibrations caused by sudden pressure changes and rapid valve core movements during pilot valve operation, preventing pressure peaks and acoustic pressure reduction shocks in the circuit, thereby ensuring the smooth operation of the entire hydraulic system and extending the service life of related components.

[0003] Traditional pilot-operated oil source valves with throttling buffers have a throttling plug inside the valve body, which is cushioned by a spring. To prevent the sidewall of the throttling plug from contacting the inner wall of the valve body, a slider is used to slide within a groove. However, the slider sliding within the groove results in significant friction between the components, leading to a shorter service life. Furthermore, both ends of the valve body are connected to the pipeline via threads, and the rotation of these threads causes the sealing ring, which provides the sealing effect, to rotate and tighten, easily causing wrinkles on the sealing surface and affecting the sealing performance. Therefore, we propose a vibration damping device for pilot-operated oil source valves. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this patent is to provide a vibration damping device for a pilot oil source valve. This solution provides rollers on both the upper and lower sides of the throttle plug, which can be rolled and installed in the wheel grooves on the inner sidewall of the valve body. This limits the movement trajectory of the throttle plug and prevents it from contacting the inner sidewall of the valve body when it moves left or right. Furthermore, the pressure ring at the inner end of the connecting pipeline is limited by a limiting component, ensuring that the pressure ring is pressed straight against the rubber ring, preventing wrinkles on the sealing surface of the rubber ring, ensuring a sealing effect, and preventing oil leakage.

[0005] The technical solution adopted by this patent to solve its technical problem is: a pilot oil source valve vibration damping device, including a valve body and a connecting pipeline. A spring is fixedly installed on the inner right side wall of the valve body, and a throttle plug is fixedly installed on the left end of the spring. A throttle hole is provided in the middle of the throttle plug. Mounting grooves are provided at both the upper and lower ends of the side wall of the throttle plug. A roller is connected to the mounting groove through a rotating shaft. Wheel grooves are provided at both the upper and lower ends of the inner side wall of the valve body. The edge of the roller is rolled and installed in the wheel groove. Both ends of the valve body are provided with circular grooves, and rubber rings are fixedly installed in the circular grooves. There are two connecting pipes. The outer side wall of the connecting pipe is provided with an annular groove, and a ring is rotatably installed in the annular groove. Connecting plates are fixedly installed at both the upper and lower ends of the outer side wall of the ring. An internally threaded pipe is fixedly installed on the left side of the connecting plate. The inner side wall of the internally threaded pipe is screwed to the outer side wall of the end of the valve body. A pressure ring is fixedly installed at the inner end of the connecting pipe. The pressure ring is located outside the rubber ring. The inner wall of the pressure ring is provided with a limiting element.

[0006] Furthermore, the limiting member includes a square tube, the outer end of the outer wall of the square tube is fixedly installed on the inner wall of the pressure ring, the left and right through holes of the valve body are both square holes, and the inner end of the outer wall of the square tube is slidably installed on the inner wall of the end through hole of the valve body.

[0007] Furthermore, the inner end of the square tube extends beyond the inner end face of the internally threaded tube.

[0008] Furthermore, the ring includes a first half-ring and a second half-ring, with the two ends of the first half-ring and the second half-ring facing each other.

[0009] Furthermore, half-body threaded columns are fixedly installed at both the upper and lower ends of the outer side walls of the first and second half-rings, and a mounting hole is provided in the middle of the connecting plate. A nut is screwed to the end of the threaded column through the mounting hole.

[0010] Furthermore, the end of the connecting plate is provided with an arc surface that matches the outer wall of the ring.

[0011] The beneficial effects of this patent are: 1. This solution features rollers on both the upper and lower sides of the throttle plug, which can be rolled and installed in the grooves on the inner wall of the valve body. This limits the movement trajectory of the throttle plug and prevents it from contacting the inner wall of the valve body when moving left or right. Furthermore, the pressure ring at the inner end of the connecting pipe is limited by a limiting component, ensuring that the pressure ring is pressed straight against the rubber ring. This prevents wrinkles on the sealing surface of the rubber ring, ensuring a good sealing effect and preventing oil leakage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this patent.

[0013] Figure 2 This is a cross-sectional view of the structure of this patent.

[0014] Figure 3 This is a side view of the circular ring of this patent.

[0015] Explanation of reference numerals in the attached drawings: 1 Valve body, 2 Spring, 3 Throttling plug, 4 Mounting groove, 5 Roller, 6 Wheel groove, 7 Rubber ring, 8 Connecting pipe, 9 Circular groove, 10 Circular ring, 11 Connecting plate, 12 Internal threaded pipe, 13 Pressure ring, 14 Square pipe, 15 First half ring, 16 Second half ring, 17 Threaded post, 18 Nut. Detailed Implementation

[0016] The present patent is further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the patent. Furthermore, it should be understood that after reading the teachings of this patent, those skilled in the art can make various alterations or modifications to this patent, and these equivalent forms also fall within the scope defined by the appended claims.

[0017] See Figure 1 , Figure 2 , Figure 3 This is a schematic diagram of the structure of this patent. A pilot oil source valve shock absorption device includes a valve body 1 and a connecting pipeline 8. A spring 2 is fixedly installed on the inner right side wall of the valve body 1. A throttle plug 3 is fixedly installed on the left end of the spring 2. A throttle hole is provided in the middle of the throttle plug 3. The upper and lower ends of the side wall of the throttle plug 3 are provided with mounting grooves 4. A roller 5 is connected to the mounting groove 4 through a rotating shaft. The upper and lower ends of the inner side wall of the valve body 1 are provided with wheel grooves 6. The edge of the roller 5 is rolled and installed in the wheel groove 6. Both ends of the valve body 1 are provided with circular grooves, and rubber rings 7 are fixedly installed in the circular grooves. There are two connecting pipes 8. The outer wall of the connecting pipe 8 is provided with a circular groove 9. A circular ring 10 is rotatably installed in the circular groove 9. Both ends of the outer wall of the circular ring 10 are fixedly installed with connecting plates 11. An internally threaded pipe 12 is fixedly installed on the left side of the connecting plate 11. The inner side wall of the internally threaded pipe 12 is screwed to the outer side wall of the end of the valve body 1. A pressure ring 13 is fixedly installed at the inner end of the connecting pipe 8. The pressure ring 13 is located outside the rubber ring 7. The inner wall of the pressure ring 13 is provided with a limiting element.

[0018] Traditional pilot-operated oil source valves with throttling buffer valves have a throttling plug inside the valve body. The throttling plug is buffered by a spring. To ensure that the side wall of the throttling plug does not contact the inner wall of the valve body, a slider is set to slide in a groove. However, the slider sliding in the groove causes greater friction between the parts, resulting in a shorter service life. In addition, both ends of the valve body are connected to the pipeline through threads. Rotating the threads will cause the sealing ring, which provides the sealing effect, to rotate and tighten, which can easily cause wrinkles on the sealing surface and affect the sealing effect.

[0019] This solution features rollers on both the upper and lower sides of the throttle plug, which can be rolled within the grooves on the inner wall of the valve body. This limits the movement trajectory of the throttle plug, preventing it from contacting the inner wall of the valve body when moving left or right. Furthermore, the pressure ring at the inner end of the connecting pipe is limited by a limiting component, ensuring that the pressure ring is pressed linearly against the rubber ring. This prevents wrinkles on the sealing surface of the rubber ring, ensuring a good seal and preventing oil leakage.

[0020] Valve body 1: Made of cast steel, cylindrical in shape, with circular grooves at both ends inside, wheel grooves 6 at the top and bottom ends of the inner side wall, and square holes on the left and right sides. The length is determined according to the actual oil source valve specifications. The inner diameter needs to match the installation space of the throttle plug 3 and spring 2 to ensure that the roller 5 rolls smoothly in the wheel groove 6. The size of the square hole is adapted to the outer wall size of the square tube 14 to realize the sliding installation of the square tube 14.

[0021] Spring 2: Made of spring steel, using a helical compression spring structure. The wire diameter is selected according to the buffering force requirements (e.g., 2mm). The outer diameter is smaller than the inner diameter of the circular groove inside the valve body 1. The free length must ensure that it provides appropriate buffering force when the throttle plug 3 is working normally.

[0022] Throttling plug 3: Made of brass, rectangular in shape (fits the internal space of valve body 1), with a throttling orifice in the middle (the orifice diameter is determined according to the oil flow requirements, for example, 1.5mm), and mounting grooves 4 at the upper and lower ends of the side wall. The size of the mounting groove 4 must match the installation of the roller 5 and the shaft to ensure that the roller 5 can rotate freely.

[0023] Roller 5: Made of stainless steel, the wheel body is cylindrical, the diameter is slightly smaller than the width of the wheel groove 6, and the thickness is adapted to the width of the mounting groove 4. It is connected to the mounting groove 4 through a rotating shaft (made of 45 steel, the diameter is determined according to the installation requirements of roller 5, such as 3mm) to achieve rolling installation.

[0024] Rubber ring 7: Made of nitrile rubber, it is annular with an inner diameter that matches the outer diameter of the connecting pipe 8. Its thickness is determined according to the sealing requirements (e.g., 5mm). It is installed in the circular groove of the valve body 1 to achieve a seal between the connecting pipe 8 and the valve body 1.

[0025] Connecting pipe 8: The material is seamless steel pipe, and the outer diameter is determined according to the oil transportation requirements (e.g., 20mm). The outer wall is provided with an annular groove 9 (the groove width is adapted to the thickness of the annular ring 10, and the groove depth ensures that the annular ring 10 can be rotatably installed). The inner end is fixedly installed with a pressure ring 13 (the material is stainless steel, with an annular structure, the inner diameter is the same as the inner diameter of the connecting pipe 8, and the thickness is determined according to the installation space).

[0026] Connecting plate 11: Made of carbon steel, rectangular plate, with a mounting hole in the middle (the hole diameter is adapted to the diameter of the half-body threaded column 17), and an arc surface at the end that matches the outer wall of the ring 10 to ensure close fit with the ring 10. Four internal threaded tubes 12 are fixedly installed on the inner side, respectively installed at the upper and lower ends of the first half-ring 15 and the second half-ring 16.

[0027] Internal threaded tube 12: Made of carbon steel, with internal threads on the inner wall to match the external threads on the outer wall of the valve body 1 (e.g., M30×2). The length must ensure that the inner end of the square tube 14 can extend beyond its inner end face (e.g., the length of the internal threaded tube 12 is 20mm, and the inner end of the square tube 14 extends 2mm beyond it).

[0028] Specifically, the limiting component includes a square tube 14, the outer end of the outer wall of the square tube 14 is fixedly installed on the inner wall of the pressure ring 13, the left and right through holes of the valve body 1 are both square holes, and the inner end of the outer wall of the square tube 14 is slidably installed on the inner wall of the end through hole of the valve body 1.

[0029] Specifically, the inner end of the square tube 14 extends beyond the inner end face of the internally threaded tube 12.

[0030] By setting the inner end of the square tube 14 to extend beyond the inner end face of the internal threaded tube 12, the square tube 14 can be inserted into the through hole (square hole) at the end of the valve body 1 first to play a limiting role when the internal threaded tube 12 is not screwed to the outer wall of the valve body 1.

[0031] Square tube 14: Made of aluminum alloy, in the shape of a square tube, the outer wall size is adapted to the square hole size at the end of the valve body 1 (e.g., a square tube with a side length of 10mm), the length must ensure that the inner end extends beyond the inner end face of the internal thread tube 12, and the outer end is fixedly installed on the inner side wall of the pressure ring 13 to limit the pressure ring 13.

[0032] Specifically, the ring 10 includes a first half-ring 15 and a second half-ring 16, with the two ends of the first half-ring 15 and the second half-ring 16 facing each other.

[0033] By dividing the ring 10 into a first half-ring 15 and a second half-ring 16, it is convenient to install the ring 10 in the ring groove 9 in the early stage.

[0034] Ring 10 (first half-ring 15 and second half-ring 16): made of 45 steel. Both the first half-ring 15 and the second half-ring 16 are semi-circular rings. After combination, the inner diameter is adapted to the outer diameter of the annular groove 9 of the connecting pipe 8, and the thickness is adapted to the groove width of the annular groove 9. The semi-body threaded column 17 is made of 45 steel and is integrally formed with the first half-ring 15 and the second half-ring 16. The diameter of the overall threaded column formed by the combination of the two semi-body threaded columns 17 on the same side is determined according to the thread hole size of the nut 18 (e.g., M8). The length must be sufficient to pass through the mounting hole of the connecting plate 11 to screw the nut 18.

[0035] Specifically, half-body threaded posts 17 are fixedly installed at both the upper and lower ends of the outer side walls of the first half-ring 15 and the second half-ring 16. The middle part of the connecting plate 11 is provided with a mounting hole, and the end of the threaded post 17 is screwed with a nut 18 through the mounting hole.

[0036] like Figure 3 As shown, the two half-threaded posts 17 on the same side can be combined into a whole threaded post. The arrangement of the half-threaded posts 17 and the nut 18 facilitates the initial assembly of the first half-ring 15 and the second half-ring 16 with the connecting plate 11.

[0037] Nut 18: Made of 45 steel, its internal thread is compatible with the external thread of the half-body threaded post 17 (e.g., M8), and is used to fasten the first half-ring 15, the second half-ring 16 and the connecting plate 11.

[0038] Specifically, the end of the connecting plate 11 is provided with an arc surface that matches the outer wall of the ring 10.

[0039] Working principle: This solution has rollers on both the upper and lower sides of the throttle plug. The rollers can roll and install the throttle plug in the groove on the inner wall of the valve body, thereby limiting the movement trajectory of the throttle plug and preventing it from contacting the inner wall of the valve body when moving left and right. In addition, the pressure ring at the inner end of the connecting pipe is limited by the limiting component, so that the pressure ring is pressed straight against the rubber ring, avoiding wrinkles on the sealing surface of the rubber ring, ensuring the sealing effect and preventing oil leakage.

[0040] It should be noted that the device structure and accompanying drawings of this patent mainly describe the principle of this patent. In terms of the technical aspects of this design principle, the setting of the device's power mechanism, power supply system and control system is not fully described. However, those skilled in the art who understand the principle of the above patent can clearly understand the specifics of its power mechanism, power supply system and control system.

[0041] This solution features rollers on both the upper and lower sides of the throttle plug, which can be rolled within the grooves on the inner wall of the valve body. This limits the movement trajectory of the throttle plug, preventing it from contacting the inner wall of the valve body when moving left or right. Furthermore, the pressure ring at the inner end of the connecting pipe is limited by a limiting component, ensuring that the pressure ring is pressed linearly against the rubber ring. This prevents wrinkles on the sealing surface of the rubber ring, ensuring a good seal and preventing oil leakage.

[0042] In the description of this patent, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," and "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this patent 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. At the same time, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "fixed installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction relationship between two elements. Unless otherwise expressly limited, those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0043] Although embodiments of this patent have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this patent, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pilot oil source valve vibration damping device, characterized in that: The valve body (1) includes a valve body (1) and a connecting pipe (8). A spring (2) is fixedly installed on the inner right side wall of the valve body (1). A throttle plug (3) is fixedly installed on the left end of the spring (2). A throttle hole is provided in the middle of the throttle plug (3). The upper and lower ends of the side wall of the throttle plug (3) are provided with mounting grooves (4). A roller (5) is connected to the mounting groove (4) through a rotating shaft. The upper and lower ends of the inner side wall of the valve body (1) are provided with wheel grooves (6). The edge of the roller (5) is rolled and installed in the wheel groove (6). The valve body (1) has circular grooves at both ends. A rubber ring (7) is fixedly installed in the circular groove. There are two connecting pipes (8). The outer wall of the connecting pipe (8) has a circular groove (9). A circular ring (10) is rotatably installed in the circular groove (9). A connecting plate (11) is fixedly installed at both ends of the outer wall of the circular ring (10). An internal threaded pipe (12) is fixedly installed on the left side of the connecting plate (11). The inner side wall of the internal threaded pipe (12) is screwed to the outer side wall of the valve body (1). A pressure ring (13) is fixedly installed at the inner end of the connecting pipe (8). The pressure ring (13) is located outside the rubber ring (7). The inner wall of the pressure ring (13) is provided with a limiting member.

2. The pilot oil source valve vibration damping device according to claim 1, characterized in that: The limiting component includes a square tube (14), the outer end of the outer wall of the square tube (14) is fixedly installed on the inner wall of the pressure ring (13), the left and right through holes of the valve body (1) are both square holes, and the inner end of the outer wall of the square tube (14) is slidably installed on the inner wall of the end through hole of the valve body (1).

3. The pilot oil source valve vibration damping device according to claim 2, characterized in that: The inner end of the square tube (14) extends beyond the inner end face of the internally threaded tube (12).

4. The pilot oil source valve vibration damping device according to claim 1, characterized in that: The ring (10) includes a first half-ring (15) and a second half-ring (16), with the two ends of the first half-ring (15) and the second half-ring (16) meeting each other.

5. The pilot oil source valve vibration damping device according to claim 4, characterized in that: Half-body threaded columns (17) are fixedly installed on the upper and lower ends of the outer side walls of the first half-ring (15) and the second half-ring (16). The middle part of the connecting plate (11) is provided with a mounting hole, and the end of the threaded column (17) is screwed with a nut (18) through the mounting hole.

6. The pilot oil source valve vibration damping device according to claim 1, characterized in that: The end of the connecting plate (11) is provided with an arc surface that matches the outer wall of the ring (10).

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