Buffering oil cylinder
By using oil reflux in the oil cylinder to achieve a buffering effect and combining the detection components to detect and control the piston rod stroke, the problems of debugging the existing cylinder buffering function and the reserved thickness space of the cylinder block are solved, and efficient buffering and stroke control are achieved.
Patent Information
- Application Number
- CN202421733598.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The retraction buffering function of existing oil cylinders needs to be achieved through the throttling of the rear buffer sleeve and the cylinder bottom, which leads to difficulty in debugging the buffer sleeve tolerance, increasing the time and cost of production and replacement. At the same time, the cylinder block needs to reserve thickness space to increase volume and cost.
The buffering effect is achieved by reflux of oil in the cylinder, and the moving stroke of the piston rod is detected and controlled by combining the detection component to detect and control the cylinder stroke.
The piston rod is buffered through oil reflux, which slows down the piston retraction speed, reduces the speed when the piston retraction, thereby reducing time and cost. At the same time, the detection components ensure the accurate movement stroke of the piston rod.
Smart Images
Figure CN222910410U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil cylinders, in particular to a buffer oil cylinder. Background Art
[0002] At present, the retraction buffer function of most oil cylinders is achieved by throttling between the rear buffer sleeve and the cylinder bottom. The tolerance of the buffer sleeve needs to be debugged and matched; if the tolerance control is not paid attention to, it is easy to cause the buffer sleeve to need to be remade, and the oil cylinder needs to be disassembled and replaced, which is very time-consuming and costly.
[0003] In addition, the cylinder body of the current oil cylinder needs to reserve enough thickness space to place the buffer structure. Therefore, the cylinder bottom will inevitably increase in volume and cost compared with the ordinary cylinder bottom.
[0004] For the original buffer structure, when debugging the buffer of the oil cylinder, several buffer sleeves need to be configured, and the processing of the rear buffer sleeve also increases the time and cost.
[0005] In view of this, it is necessary to design a buffer oil cylinder to solve the above problems. Summary of the Utility Model
[0006] The utility model aims to solve at least one of the technical problems existing in the prior art.
[0007] For this purpose, the utility model provides a buffer oil cylinder, which can achieve the buffer effect through the reflux of the oil in the cylinder body, and at the same time has the detection and control of the stroke of the oil cylinder.
[0008] A buffer oil cylinder according to a first aspect of the utility model includes:
[0009] A cylinder body, in which an oil cavity is formed;
[0010] A piston rod, which is arranged in the cylinder body and can move axially along it. A first oil hole adapted to communicate with the oil cavity is also provided on the piston rod;
[0011] A throttling component, which includes a second oil hole and a third oil hole that are connected. Both the second oil hole and the third oil hole are connected to the oil cavity. When the piston rod passes through the second oil hole and continuously moves towards the third oil hole, the oil in the oil cavity flows back to the second oil hole through the third oil hole to buffer the piston rod.
[0012] Preferably, the throttling component further includes a throttling plug, which is detachably arranged in the third oil hole to control the flow rate of the third oil hole flowing back to the second oil hole.
[0013] Further preferably, a second oil port assembly is provided at the oil outlet of the second oil hole, a third oil port assembly is provided at the oil outlet of the third oil hole, the second oil port assembly and the third oil port assembly are connected via an oil circuit block, a fifth oil hole is formed in the oil circuit block, and the fifth oil hole communicates the second oil hole and the third oil hole to form a reflux oil circuit.
[0014] Preferably, a plug is provided on both the second oil port assembly and the third oil port assembly for plugging.
[0015] Further preferably, when the end face of the piston rod extending into the cylinder body abuts against the cylinder body, the first oil hole and the second oil hole are communicated with each other.
[0016] Preferably, it further includes a detection assembly. The detection assembly includes a detection device and a fourth oil hole formed in the cylinder body. When the first oil hole and the fourth oil hole are communicated with each other, the oil in the oil chamber flows out through the first oil hole and the fourth oil hole in sequence. The detection device is arranged at the oil outlet of the fourth oil hole to obtain the oil output at the oil outlet at this time and control the moving stroke of the piston rod according to the oil output.
[0017] Further preferably, the detection device includes a first oil port assembly and a flow monitoring device. The first oil port assembly is arranged at the oil outlet of the fourth oil hole, and the flow monitoring device is arranged on the first oil port assembly to obtain the oil volume flowing out of the fourth oil hole in real time.
[0018] Preferably, the aperture of the fourth oil hole is greater than or equal to the aperture of the first oil hole so as to be able to completely receive the oil flowing out through the first oil hole.
[0019] Further preferably, a sealing assembly is further provided in the cylinder body, and the fourth oil hole can penetrate through the sealing assembly and communicate with the first oil hole.
[0020] Preferably, the sealing assembly includes a dust ring and a sealing ring. The dust ring is arranged at the opening of the inner wall of the cylinder body, and the sealing ring is arranged axially along the inner wall of the cylinder body.
[0021] The beneficial effects of the present utility model are as follows. The buffering during the retraction of the piston rod is achieved through a throttling component. The throttling component can push the oil in the oil cavity of the cylinder block to flow back when the piston rod retracts. When the oil flows back, a relative force is generated on the piston rod at the same time, thereby slowing down the speed of the piston retraction, and further buffering the piston rod. In addition, the movement stroke of the piston rod can be detected through a detection component. Through the cooperation between the fourth oil hole opened on the cylinder block and the first oil hole opened on the piston rod, when the fourth oil hole is connected to the first oil hole, the movement position of the piston rod can be judged by the oil output at the fourth oil hole, so as to obtain the movement stroke of the piston rod.
[0022] Other features and advantages of the present utility model will be described in the following specification, and part of them will be obvious from the specification or understood by implementing the present utility model. The objectives and other advantages of the present utility model are realized and obtained by the structures specifically pointed out in the specification, claims and drawings.
[0023] To make the above objectives, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the attached drawings, the detailed description is as follows. Description of the Drawings
[0024] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0025] Figure 1 Schematic perspective view of the buffer oil cylinder of the present utility model;
[0026] Figure 2 Internal structure cross-sectional view of the buffer oil cylinder of the present utility model;
[0027] Figure 3 Schematic diagram when the piston rod of the buffer oil cylinder of the present utility model is at the designed stroke position;
[0028] Figure 4 Schematic diagram of oil flow when the piston rod of the buffer oil cylinder of the present utility model does not block the second oil hole;
[0029] Figure 5 Schematic diagram of oil flow when the piston rod of the buffer oil cylinder of the present utility model partially blocks the second oil hole;
[0030] Figure 6 Schematic diagram of oil flow when the piston rod of the buffer oil cylinder of the present utility model completely blocks the second oil hole.
[0031] Description of the reference numerals:
[0032] 1. Cylinder block; 11. Oil cavity;
[0033] 2. Piston rod; 21. First oil hole;
[0034] 3. Throttle component; 31. Second oil hole; 32. Third oil hole; 33. Fifth oil hole; 34. Throttle plug; 35. Second oil port assembly; 36. Third oil port assembly; 37. Plug seal; 38. Oil circuit block
[0035] 4. Detection component; 41. Detection device; 42. Fourth oil hole; 43. First oil port assembly
[0036] 5. Sealing component; 51. Dust ring; 52. Sealing ring Specific embodiments
[0037] The present utility model will now be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model. In the description of the present utility model, it should be understood that unless otherwise specified, the meaning of "a plurality of" is two or more.
[0038] See Figures 1 to 3 , a buffer oil cylinder in a specific embodiment of the present utility model includes a cylinder block 1, a piston rod 2 and a throttle component 3. An oil chamber 11 is formed in the cylinder block 1. One end of the cylinder block 1 is open and the other end is closed. In this embodiment, it is set that the closed end of the cylinder block 1 is the cylinder bottom and the open end of the cylinder block 1 is the cylinder top. The piston rod 2 extends into the cylinder block 1 from the cylinder top until the end face of the extending end of the piston rod 2 abuts against the cylinder bottom. During operation, the piston rod 2 moves from the cylinder bottom towards the cylinder top direction until the piston rod 2 moves to the set stroke L position, and then moves towards the cylinder bottom direction until it abuts against the cylinder bottom. And during the movement towards the cylinder bottom, the throttle component 3 can return the oil stored between the rod end of the piston rod 2 and the cylinder bottom. During the return process, a relative force can be generated between the oil and the piston rod 2, thereby restricting the moving speed of the piston rod 2 towards the cylinder bottom to achieve a buffering effect on the movement of the piston rod 2.
[0039] Specifically, the throttle component 3 is arranged near the cylinder bottom. The throttle component 3 includes a throttle plug 34, a second oil hole 31 and a third oil hole 32. The second oil hole 31 and the third oil hole 32 are arranged on the same horizontal line along the axial direction. The third oil hole 32 is arranged closer to the cylinder bottom relative to the second oil hole 31, and the aperture of the second oil hole 31 is larger than that of the third oil hole 32. The throttle plug 34 is arranged in the third oil hole 32. Therefore, when the oil in the oil chamber 11 is discharged under pressure, most of it will quickly flow out from the second oil hole 31, while a small part will slowly flow out from the third oil hole 32.
[0040] Among them, the throttle plug 34 can control the return flow rate of the hydraulic oil. Throttle plugs 34 of different specifications have throttle holes with different shapes and sizes. Since the shapes and sizes of different throttle holes are different, and the amount of hydraulic oil that can flow through a throttle hole with a smaller aperture is smaller, while the amount of hydraulic oil that can flow through a throttle hole with a larger aperture is larger. Moreover, since the throttle plug 34 is detachably arranged in the third oil hole 32, in this embodiment, the throttle plug 34 and the third oil hole 32 are installed and fixed by a threaded connection method. Therefore, the return flow rate of the hydraulic oil can be controlled by using throttle plugs 34 of different specifications, so as to achieve adjustable buffering for the piston rod 2. It should be noted that the connection between the throttle plug 34 and the third oil hole 32 is not limited to the threaded connection method, and other fixed installation methods such as snap connection and plug connection are also acceptable.
[0041] See Figure 2 , in order to construct a return oil circuit between the second oil hole 31 and the third oil hole 32, a second oil port assembly 35 is also provided at the oil outlet of the second oil hole 31, and a third oil port assembly 36 is provided at the oil outlet of the third oil hole 32. The third oil port assembly 36 is connected to the second oil port assembly 35 via an oil circuit block 38, and a fifth oil hole 33 is opened in the oil circuit block 38, and the second oil hole 31 and the third oil hole 32 can be connected through the fifth oil hole 33 to realize the return of the hydraulic oil in the third oil hole 32 to the second oil hole 31 and form a return oil circuit.
[0042] In addition, plug seals 37 are provided on both the second oil port assembly 35 and the third oil port assembly 36. The second oil port assembly 35 is suitable for being externally connected to a fuel supply pipeline to supply oil to the oil cavity 11. When supplying oil, the second oil port assembly 35 is opened, and the third oil port assembly 36 uses the plug seal 37 to block its input port and keep it in a closed state to ensure that the hydraulic oil input into the oil cavity 11 will not flow out from the oil outlet of the third oil hole 32 during oil supply.
[0043] See Figure 4 , when the piston rod 2 retracts, the piston rod 2 squeezes the hydraulic oil in the oil cavity 11 to move it into the second oil hole 31 and the third oil hole 32. Among them, when the rod end of the piston rod 2 has not passed through the second oil hole 31, since the diameter of the second oil hole 31 is set to be larger than the diameter of the third oil hole 32, and no throttle plug 34 is provided in the second oil hole 31 to limit the inflowing oil volume, most of the hydraulic oil in the oil cavity 11 will smoothly flow into the second oil hole 31, while a small part of the hydraulic oil will flow into the third oil hole 32. At this time, under the pressure of the piston rod 2, the hydraulic oil in the oil cavity 11 can be smoothly discharged, and the hydraulic oil in the oil cavity 11 will not produce a buffering effect on the piston rod 2.
[0044] See Figure 5, as the piston rod 2 continuously moves towards the bottom of the cylinder, when the end of the piston rod 2 partially coincides with the second oil hole 31, the piston rod 2 blocks part of the oil outlet area of the second oil hole 31, thereby causing the amount of oil discharged from the second oil hole 31 to continuously decrease, and the force generated by the oil in the oil chamber 11 on the piston rod 2 to continuously increase until the piston rod 2 completely blocks the second oil hole 31. At this time, the oil in the oil chamber 11 can only flow out from the third oil hole 32, and a throttle plug 34 is provided in the third oil hole 32, thereby causing the flow rate of the oil flowing out from the third oil hole 32 to decrease, and the force generated by the oil on the piston rod 2 also reaches the maximum. At this time, the buffering effect on the piston rod 2 also reaches the maximum.
[0045] See Figure 6 , the end of the piston rod 2 completely passes through the second oil hole 31 and continues to move towards the bottom of the cylinder. When the piston rod 2 does not reach the third oil hole 32, at this time, the oil in the oil chamber 11 flows into the third oil hole 32 from the oil chamber 11 under the action of the piston rod 2, and successively passes through the throttle plug 34 and the fifth oil hole 33, and finally flows into the second oil port assembly 35. During this moving stroke of the piston rod 2, the force generated by the oil in the oil chamber 11 on the piston rod 2 does not change, that is, the piston rod 2 receives a stable buffering effect.
[0046] As the piston rod 2 further moves towards the bottom of the cylinder, when the piston rod covers part of the oil outlet area of the third oil hole 32, the force generated by the oil in the oil chamber 11 on the piston rod 2 further increases, thereby further enhancing the buffering effect of the oil on the piston rod 2. Until the piston rod 2 completely closes the third oil chamber 11, when the end of the piston rod 2 abuts against the bottom of the cylinder, the first oil hole 21 opened on the piston rod 2 is communicated with the second oil hole 31. Then, the remaining part of the oil in the oil chamber 11 can flow to the second oil hole 31 through the first oil hole 21 opened on the piston rod 2 and flow out to avoid pressure being trapped in the oil chamber 11.
[0047] See Figure 3 , a sealing assembly 5 is also provided in the cylinder block 1. The sealing assembly 5 is arranged at one end close to the cylinder top. By means of the sealing assembly 5, it is possible to limit the oil in the oil chamber 11 from flowing out along the gap between the piston rod 2 and the inner wall of the cylinder block 1 during the reciprocating movement of the piston rod 2 in the cylinder block 1.
[0048] In order to monitor the amount of oil leaked from the oil chamber 11, a first oil hole 21 is provided on the rod body of the piston rod 2. The first oil hole 21 is communicated with the oil chamber 11, and a fourth oil hole 42 is also opened on the cylinder block 1. The fourth oil hole 42 penetrates the sealing assembly 5 and can be communicated with the first oil hole 21 at a specific moment. Therefore, when the two are docked, the oil in the oil chamber 11 can flow out successively through the first oil hole 21 and the fourth oil hole 42.
[0049] Specifically, the sealing assembly 5 includes a dust-proof ring 51 and a sealing ring 52. Among them, the dust-proof ring 51 is arranged at the opening of the inner wall of the cylinder block 1, that is, at the cylinder head position, and the sealing ring 52 is arranged axially along the inner wall of the cylinder block 1. Among them, the dust-proof ring 51 adopts an Elot dust-proof ring, and the sealing ring 52 adopts a Strseal and has four channels. The fourth oil hole 42 is correspondingly opened at the middle position of the four Strseals. When the piston rod 2 moves to the set stroke L position, the fourth oil hole 42 is communicated with the first oil hole 21 opened on the piston rod 2, so as to discharge the oil fluid into the fourth oil hole 42 through the first oil hole 21. And in order to facilitate the discharge of the oil fluid, the aperture of the fourth oil hole 42 needs to be set to be greater than or equal to the aperture of the first oil hole 21 to ensure that the fourth oil hole 42 can completely receive the oil fluid discharged from the first oil hole 21.
[0050] Regarding the amount of oil fluid leaked from the fourth oil hole 42, it needs to be monitored in real time through the detection assembly 4. The detection assembly 4 includes a detection device 41. The detection device 41 includes a first oil port assembly 43 and an externally connected flow monitoring device (not shown in the figure). The first oil port assembly 43 is arranged at the oil outlet of the fourth oil hole 42, and the flow monitoring device is arranged on the first oil port assembly 43. Through the flow monitoring device, the amount of oil fluid leaked from the fourth oil hole 42 can be monitored in real time, so that the staff can discover and repair in time.
[0051] Among them, when the flow monitoring device monitors that there is a small amount of oil fluid overflowing at the fourth oil hole 42, it indicates that there may be oil fluid leakage in the oil cylinder at this time, and relevant staff need to check and repair the oil cylinder.
[0052] In addition, when the flow monitoring device monitors that the oil fluid of the fourth oil hole 42 flows out in a stream, it indicates at this time that the first oil hole 21 corresponds to the fourth oil hole 42, the piston rod 2 reaches its set stroke L, at the same time the second oil hole 31 stops supplying oil to the oil cavity 11, and the piston rod 2 stops continuing to extend and starts to retract. Therefore, by monitoring the amount of oil fluid in the fourth oil hole 42 through the flow monitoring device, not only can it monitor whether the oil fluid in the oil cylinder leaks, but also it can achieve the purpose of detecting and controlling the moving stroke of the piston rod 2.
[0053] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0054] The above-described is based on the ideal embodiments of the present utility model as an inspiration. Through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A buffer cylinder, characterized in that: include: A cylinder body (1), wherein an oil chamber (11) is formed in the cylinder body (1); Piston rod (2): the piston rod (2) is arranged in the cylinder body (1) and is movable along the axial direction thereof; the piston rod (2) is also provided with a first oil hole (21) suitable for communicating with the oil chamber (11); A throttling assembly (3), the throttling assembly (3) comprising a second oil hole (31) and a third oil hole (32) which are connected to each other, the second oil hole (31) and the third oil hole (32) being both connected to the oil chamber (11), and as the piston rod (2) passes through the second oil hole (31) and continues to move toward the third oil hole (32), the oil in the oil chamber (11) flows back to the second oil hole (31) via the third oil hole (32) to cushion the piston rod (2).
2. The buffer cylinder according to claim 1, characterized in that: The throttling assembly (3) further comprises a throttling plug (34), which is detachably arranged in the third oil hole (32) to control the flow rate of the third oil hole (32) returning to the second oil hole (31).
3. The buffer cylinder according to claim 2, characterized in that: A second oil port assembly (35) is provided at the oil outlet of the second oil hole (31), and a third oil port assembly (36) is provided at the oil outlet of the third oil hole (32). The second oil port assembly (35) and the third oil port assembly (36) are connected via an oil passage block (38). A fifth oil hole (33) is provided in the oil passage block (38). The fifth oil hole (33) communicates with the second oil hole (31) and the third oil hole (32) to form a return oil passage.
4. The buffer cylinder according to claim 3, characterized in that: The second oil port assembly (35) and the third oil port assembly (36) are both provided with screw plugs (37).
5. The buffer cylinder according to claim 1, characterized in that: When the end surface of one end of the piston rod (2) extending into the cylinder body (1) abuts against the cylinder body (1), the first oil hole (21) is connected to the second oil hole (31).
6. The buffer cylinder according to any one of claims 1 to 5, characterized in that: The invention also comprises a detection component (4), wherein the detection component (4) comprises a detection device (41) and a fourth oil hole (42) opened on the cylinder body (1), and when the first oil hole (21) is connected to the fourth oil hole (42), the oil in the oil chamber (11) flows out through the first oil hole (21) and the fourth oil hole (42) in sequence, and the detection device (41) is arranged at the oil outlet of the fourth oil hole (42) to obtain the oil output at the oil outlet of the fourth oil hole (42) at this time, and control the movement stroke of the piston rod (2) according to the oil output.
7. The buffer cylinder according to claim 6, characterized in that: The detection device (41) comprises a first oil port component (43) and a flow monitoring device, wherein the first oil port component (43) is arranged at the oil outlet of the fourth oil hole (42), and the flow monitoring device is arranged on the first oil port component (43) to obtain the amount of oil flowing out of the fourth oil hole (42) in real time.
8. The buffer cylinder according to claim 6, characterized in that: The diameter of the fourth oil hole (42) is greater than or equal to the diameter of the first oil hole (21), so as to be able to completely receive the oil flowing out through the first oil hole (21).
9. The buffer cylinder according to claim 6, characterized in that: A sealing component (5) is also provided in the cylinder body (1), and the fourth oil hole (42) can penetrate the sealing component (5) and communicate with the first oil hole (21).
10. The buffer cylinder according to claim 9, characterized in that: The sealing assembly (5) comprises a dust ring (51) and a sealing ring (52); the dust ring (51) is arranged at an opening of the inner wall of the cylinder body (1); and the sealing ring (52) is arranged along the axial direction of the inner wall of the cylinder body (1).