Buffer oil cylinder with built-in oil duct
By incorporating an internal oil passage and guide sleeve into the piston rod of the hydraulic cylinder, along with a check valve and a throttle valve, the high cost and cumbersome adjustment issues caused by numerous external components of the hydraulic cylinder are resolved, resulting in reduced costs, improved reliability, and enhanced stability.
Patent Information
- Application Number
- CN202520433498.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-03-12
AI Technical Summary
The existing hydraulic cylinder structure has many external parts, resulting in high production and processing costs, and the buffer adjustment process is complicated and requires the assistance of professional tools.
A buffer cylinder with built-in oil passages is designed. By setting the first and second oil passages inside the piston rod, the welding work of external joints is reduced, and the buffer adjustment steps are simplified by using the cooperation of guide sleeve, one-way valve and throttle valve.
It reduces the production and processing costs of hydraulic cylinders, improves reliability and stability of hydraulic systems, simplifies buffer adjustment steps, and extends service life.
Smart Images
Figure CN223563166U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oil cylinder technical field especially relates to a buffer oil cylinder of oil channel built -in. BACKGROUND
[0002] Oil cylinder is a kind of device using liquid pressure to drive mechanical device, by including: cylinder, piston, piston rod, sealing element, actuator, import and export oil port, widely used in industry, agriculture, construction and other fields, realize the transmission of force, compression and push and pull etc.
[0003] When oil cylinder is designed, both reasonable structural stability and safety are guaranteed, and oil cylinder manufacturing cost is effectively controlled, and the oil cylinder structure of the present application can have the following shortcomings:
[0004] 1, oil cylinder external accessories are more, and quality problems can easily appear in production process, and the risk of oil cylinder failure is increased in later work, and steps are tedious when after-sales maintenance, and oil cylinder processing manufacturing cost is increased;
[0005] 2, oil cylinder front buffer needs to be equipped with buffer sleeve, occupies oil cylinder internal space, and is not suitable for built-in pipeline oil cylinder;
[0006] 3, when debugging oil cylinder buffer, oil cylinder and large torque piston need to be disassembled, and steps are tedious and need professional tool assistance. UTILITY MODEL CONTENTS
[0007] The utility model solves the technical problems that the prior art oil cylinder has more external accessories and increases the oil cylinder production and processing cost, and provides a buffer oil cylinder with built-in oil channel, which can reduce the cost of oil cylinder production and processing by improving the structure of the oil cylinder.
[0008] The utility model solves the technical problems and adopts the technical scheme of a buffer oil cylinder with built-in oil channel, which comprises a cylinder, a piston rod and a piston, the piston rod is located in the cylinder, one end of the piston rod extends to the outside of the cylinder, a first oil channel and a second oil channel are formed in the piston rod, and the piston is fixed to one end of the piston rod;Wherein: the piston divides the internal space of the cylinder into a first chamber and a second chamber, one end of the first oil channel is communicated with the first chamber, one end of the second oil channel is communicated with the second chamber, and the other end of the first oil channel and the other end of the second oil channel are both located outside the cylinder and communicated.
[0009] Therefore, by designing the first oil channel and the second oil channel in the piston rod, the welding operation of the external joints and other accessories of the oil cylinder can be reduced, the risk of oil leakage caused by the welding operation of the external joints and other accessories of the oil cylinder is reduced, the reliability of the oil cylinder can be improved, and the production and processing cost of the oil cylinder can be reduced.
[0010] Further, a guide sleeve is sleeved on the outside of the piston rod and connected with the cylinder body.
[0011] Further, a guide sleeve cavity and a gap are formed between the piston rod and the guide sleeve, the gap is located on the side of the guide sleeve cavity close to the first chamber, and the guide sleeve cavity communicates with the gap. In this way, the size of the gap can be designed according to the buffering requirements of different models of oil cylinders.
[0012] Further, the oil port at the position where the first oil channel communicates with the first chamber is a waist-shaped hole. In this way, the waist-shaped hole can change its oil passing area when the oil cylinder is throttling buffered, so that the oil cylinder can be better buffered, and the buffering effect of the oil cylinder is further improved.
[0013] Further, the guide sleeve is provided with a first valve core hole and a second valve core hole in the circumferential direction.
[0014] Further, a one-way valve is arranged in the first valve core hole.
[0015] Further, a throttle valve is arranged in the second valve core hole. In this way, through the cooperation of the guide sleeve, the one-way valve and the throttle valve, the high-speed rotating piston rod and piston can be slowly reduced, so as to avoid the piston from colliding with the guide sleeve and generating violent vibration when the piston moves to contact the guide sleeve, so as to effectively protect the oil cylinder and the entire hydraulic system, improve the stability of the entire hydraulic system and the operation feeling of the operator, and prolong the service life of the oil cylinder; when adjusting the buffering effect of the oil cylinder, only the guide sleeve needs to be disassembled, and the throttle valve needs to be replaced to adjust the flow between the guide sleeve cavity and the first chamber, so as to adjust the buffering effect. Compared with the existing oil cylinder adjusting buffering, the oil cylinder and the large torque piston need to be disassembled, and this method has the advantages of simple structure, easy operation, simplified steps of adjusting the buffering effect of the oil cylinder, shortened time of adjusting the buffering effect of the oil cylinder, and improved adjusting time of the buffering effect of the oil cylinder.
[0016] Further, the second valve core hole and the throttle valve one-to-one correspond. In this way, the number of throttle valves can be designed according to the buffering requirements of different models of oil cylinders.
[0017] Further, the end face of the guide sleeve close to the first oil channel is provided with a retaining ring. In this way, the retaining ring can ensure that the one-way valve and the throttle valve are fixed in the guide sleeve to prevent the one-way valve and the throttle valve from falling off.
[0018] Further, sealing assemblies are arranged between the guide sleeve and the piston rod and between the cylinder body and the piston rod. Thus, the sealing assembly between the guide sleeve and the piston rod can ensure that the hydraulic oil in the first chamber does not leak, and the sealing assembly between the cylinder body and the piston rod can ensure that the hydraulic oil in the first chamber and the hydraulic oil in the second chamber do not flow into each other.
[0019] Compared with the prior art, the utility model has the advantages of:
[0020] 1. The utility model discloses a first oil channel and a second oil channel are arranged in the piston rod, which can reduce the welding operation of the external joint and other accessories of the oil cylinder, reduce the risk of oil leakage caused by the welding operation of the external joint and other accessories of the oil cylinder, improve the reliability of the oil cylinder, and reduce the production and processing cost of the oil cylinder.
[0021] 2. The utility model discloses a guide sleeve, a one-way valve and a throttle valve are matched with each other, which can slowly reduce the high-speed rotating piston rod and piston, avoid the piston from colliding with the guide sleeve and generating violent vibration when the piston moves to contact the guide sleeve, effectively protect the oil cylinder and the entire hydraulic system, improve the stability of the entire hydraulic system and the operation feeling of the operator, and prolong the service life of the oil cylinder.
[0022] 3. When adjusting the buffer effect of the oil cylinder, only the guide sleeve needs to be disassembled, and the throttle valve needs to be replaced to adjust the flow between the abdominal cavity of the guide sleeve and the first chamber, so as to adjust the buffer effect. Compared with the existing oil cylinder, when adjusting the buffer, the oil cylinder and the large torque piston need to be disassembled. The structure is simple, easy to operate, can simplify the steps of adjusting the buffer effect of the oil cylinder, shorten the time of adjusting the buffer effect of the oil cylinder, and improve the adjustment time of the buffer effect of the oil cylinder. BRIEF DESCRIPTION OF DRAWINGS
[0023] The utility model will be further described below in combination with the drawings and examples.
[0024] Figure 1 It is a structure schematic view of the buffer oil cylinder with the oil channel built-in of the utility model;
[0025] Figure 2 It is a structure schematic view of the buffer oil cylinder with the oil channel built-in of the utility model in the buffer state;
[0026] Figure 3 It is a structure schematic view of the buffer oil cylinder with the oil channel built-in of the utility model in the buffer process;
[0027] Figure 4 It is a structure schematic view of the buffer oil cylinder with the oil channel built-in of the utility model in the full extension state or the beginning retraction state;
[0028] Figure 5The utility model discloses a structure schematic diagram of waist shape hole oil port.
[0029] Figure 6 The utility model discloses a buffer area schematic diagram.
[0030] Figure 7 The utility model discloses the position relation drawing of one way valve and throttle valve.
[0031] Figure 8 The utility model discloses a structure schematic diagram of one way valve.
[0032] Figure 9 The utility model discloses a structure schematic diagram of throttle valve.
[0033] In the figure: 1, cylinder body;2, piston rod;201, first oil channel;202, second oil channel;3, first chamber;4, second chamber;5, guide sleeve;501, guide sleeve abdominal cavity;502, gap;503, baffle ring;504, first valve core hole;505, second valve core hole;6, one way valve;7, throttle valve;71, through hole;8, piston;9, sealing assembly. DETAILED DESCRIPTION
[0034] The utility model will be further explained in detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only the basic structure of the utility model is schematically shown, therefore, only the structure related to the utility model is shown.
[0035] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the features limited as "first", "second" can be explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.
[0036] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "connection", "connection" should be broad sense understanding, for example, can be fixed connection, can be detachable connection, or integrally connected;Can be mechanical connection, can be electrical connection;Can be directly connected, can be indirectly connected through the intermediate medium, can be the communication inside two elements.For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.
[0037] As Figures 1 to 9 The utility model discloses a buffer oil cylinder of oil passage built-in, including: cylinder body 1, piston rod 2 and piston 8, piston rod 2 is located in cylinder body 1, and one end of piston rod 2 extends to the outside of cylinder body 1, first oil passage 201 and second oil passage 202 are seted up in piston rod 2, and piston 8 is fixed at one end of piston rod 2;Wherein: the inside space of cylinder body 1 is divided into first chamber 3 and second chamber 4 by piston 8, one end of first oil passage 201 is communicated with first chamber 3, one end of second oil passage 202 is communicated with second chamber 4, and the other end of first oil passage 201 and the other end of second oil passage 202 are all communicated with the outside of cylinder body 1.Thus, by the design mode of first oil passage 201 and second oil passage 202 built-in in piston rod 2, the welding operation of the external joint and other accessories of the oil cylinder can be reduced, the risk of oil leakage caused by the welding operation of the external joint and other accessories of the oil cylinder is reduced, the reliability of the oil cylinder can be improved, and the production and processing cost of the oil cylinder is also reduced.
[0038] In other words, since first oil passage 201 and second oil passage 202 are built-in on piston rod 2, such design can reduce the external accessories of the oil cylinder, reduce the probability of quality problems in the production process of the oil cylinder, reduce the probability of faults in the later working process of the oil cylinder, and reduce the production and processing cost of the oil cylinder.
[0039] In the embodiment, it also includes: guide sleeve 5 is sleeved on the outer periphery of piston rod 2, and guide sleeve 5 is connected with cylinder body 1;Piston rod 2 and guide sleeve 5 form guide sleeve abdominal cavity 501 and gap 502, gap 502 is located on the side of guide sleeve abdominal cavity 501 close to first chamber 3, and guide sleeve abdominal cavity 501 is communicated with gap 502.Thus, the size of gap 502 can be designed according to the buffering requirements of different models of oil cylinders. Figure 1 And Figure 6 As shown in the drawings, for different models of oil cylinders, the required buffering effect can be achieved by changing the cooperation gap 502 between the guide sleeve buffering area and piston rod 2 and the length of the buffering area.
[0040] As Figure 1 And Figure 5As shown, in the present embodiment, the oil port at the position where the first oil passage 201 communicates with the first chamber 3 is a waist-shaped hole. Thus, when the oil cylinder is throttling and buffering, the cooperation between the waist-shaped hole and the guide sleeve 5 can change the oil passing area, so that the oil cylinder can be better buffered, and the buffering effect of the oil cylinder is further improved.
[0041] In the present embodiment, the guide sleeve 5 is provided with a first valve core hole 504 and a second valve core hole 505 in the circumferential direction; the first valve core hole 504 is provided with a one-way valve 6; and the second valve core hole 505 is provided with a throttle valve 7. Thus, through the cooperation of the guide sleeve 5, the one-way valve 6 and the throttle valve 7, the high-speed operating piston rod 2 and the piston 8 can be slowly reduced, so that the piston 8 is prevented from colliding with the guide sleeve 5 to generate violent vibration when the piston 8 moves to contact the guide sleeve 5, the oil cylinder and the entire hydraulic system can be effectively protected, the stability of the entire hydraulic system and the operation feeling of the operator are improved, and the service life of the oil cylinder is prolonged; when the buffering effect of the oil cylinder is adjusted, only the guide sleeve 5 needs to be disassembled, and the throttle valve 7 needs to be replaced to adjust the flow between the abdominal cavity of the guide sleeve 5 and the first chamber 3, so as to adjust the buffering effect. Compared with the existing oil cylinder adjusting buffering, the oil cylinder and the large torque piston and other components need to be disassembled, the method has a simple structure and is convenient to operate, can simplify the steps of adjusting the buffering effect of the oil cylinder, shorten the time of adjusting the buffering effect of the oil cylinder, and improve the adjustment time of the buffering effect of the oil cylinder.
[0042] As shown in Figure 1 and Figure 7 , in the present embodiment, the second valve core hole 505 corresponds to the throttle valve 7 one by one. Thus, the number of the throttle valve 7 can be designed according to the buffering requirements of different models of oil cylinders, and the throttle valve 7 can be provided with multiple. In a specific embodiment, the buffering requirements can be achieved by adjusting the number of the throttle valve 7 or changing the size of the through hole 71 of the throttle valve 7.
[0043] In the present embodiment, the space formed between the inner wall of the cylinder body 1, the outer circumferential surface of the piston rod 2, the guide sleeve 5 and one end of the piston 8 is the first chamber 3; and the space formed between the inner wall of the cylinder body 1, the other end of the piston rod 2 and the other end of the piston 8 is the second chamber 4.
[0044] In the present embodiment, as shown in Figure 1 and Figure 6 , the first valve core hole 504 and the second valve core hole 505 of the guide sleeve 5 are provided with a retaining ring 503 close to the end surface of the piston 8. Thus, the retaining ring 503 can ensure that the one-way valve 6 and the throttle valve 7 are fixed in the first valve core hole 504 and the second valve core hole 505 of the guide sleeve 5, so as to prevent the one-way valve 6 and the throttle valve 7 from falling off.
[0045] In this embodiment, sealing components 9 are provided between the guide sleeve 5 and the piston rod 2, and between the cylinder body 1 and the piston rod 2. Thus, the sealing component 9 between the guide sleeve 5 and the piston rod 2 ensures that the hydraulic oil in the first chamber 3 will not leak (i.e., the hydraulic oil in the first chamber 3 will not leak outwards); the sealing component 9 between the cylinder body 1 and the piston rod 2 ensures that the hydraulic oil in the first chamber 3 and the hydraulic oil in the second chamber 4 will not flow into each other.
[0046] Specifically, the sealing component 9 includes, but is not limited to, sealing rings and dustproof rings.
[0047] The extension process of the hydraulic cylinder of this utility model is as follows: Figure 1 As shown, firstly, the hydraulic cylinder is in its normal extended state. At this time, neither the one-way valve 6 nor the throttle valve 7 is activated. The oil in the first chamber 3 flows out through the oblong oil hole and the first oil passage 201, while the oil in the second chamber 4 flows in through the second oil passage 202. Figure 2 - Figure 4 As shown, as the piston rod 2 extends further, the waist-shaped oil hole and the guide sleeve 5 begin to coincide radially, as... Figure 3 As shown, when the waist-shaped oil hole reaches the buffer area (i.e., when the oil port of the waist-shaped hole coincides with the guide sleeve 5 radially), the oil passage area of the waist-shaped hole decreases (due to the decrease in the oil passage area, the oil flow rate in the first chamber 3 slows down, and the cylinder extension speed slows down, thus achieving throttling and buffering of the cylinder), and buffering begins. At this time, the one-way valve 6 does not function, that is, the valve core of the one-way valve 6 is pressed against the valve body by the high-pressure oil on the right side, causing the one-way valve 6 to close and not function; the throttle valve 7 functions, the valve core of the throttle valve 7 is pressed against the valve body by the high-pressure oil on the right side, but hydraulic oil can pass through the through hole 71 on the valve body (e.g., Figure 9 (As shown) The fluid flows into the guide sleeve cavity 501, relieving some of the pressure on the right side of the oil to prevent excessive buffer pressure from causing the cylinder to expand and fail; as Figure 4 As shown, finally, the waist-shaped oil port is connected to the guide sleeve cavity 501, and the oil in the guide sleeve cavity 501 can flow out through the first oil passage 201. At this time, the piston rod 2 and piston 8 are in the fully extended state, and the buffering ends.
[0048] The retraction process of the hydraulic cylinder of this utility model is as follows: Figure 4As shown, the external oil flows in through the first oil passage 201, and the oil in the second chamber 4 flows out through the second oil passage 202, at this time, the inflowing oil first enters the guide sleeve abdominal cavity 501, the check valve 6 and the throttle valve 7 are in action (as the oil is continuously injected into the guide sleeve abdominal cavity 501, when the guide sleeve abdominal cavity 501 is full of oil, the oil can push the valve core of the check valve 6 and the throttle valve 7, at this time, the valve core of the check valve 6 and the throttle valve 7 is pushed open), so that the oil in the guide sleeve abdominal cavity 501 can flow into the first chamber 3, push the piston 8 and the piston rod 2 to retract, in this way, the oil pressure area between the guide sleeve 5 and the piston 8 (i.e. the first chamber 3) is increased, which can greatly reduce the preparation time of the retracting action of the oil cylinder.
[0049] In summary, the utility model discloses a design mode that first oil passage 201, second oil passage 202 are arranged in the piston rod 2, which can reduce the welding operation of the external joint and other accessories of the oil cylinder, reduce the risk of oil leakage caused by the welding operation of the external joint and other accessories of the oil cylinder, improve the reliability of the oil cylinder, and also reduce the production and processing cost of the oil cylinder. Through the cooperation of the guide sleeve 5, the check valve 6 and the throttle valve 7, the high-speed rotating piston rod 2 and piston 8 can be slowly reduced, avoiding the piston 8 from moving to contact the guide sleeve 5 and colliding with the guide sleeve 5 to produce violent vibration, effectively protecting the oil cylinder and the entire hydraulic system, improving the stability of the entire hydraulic system and the operation feeling of the operator, and prolonging the service life of the oil cylinder. When adjusting the buffer effect of the oil cylinder, only the guide sleeve 5 needs to be disassembled, and the throttle valve 7 is replaced to adjust the flow between the abdominal cavity of the guide sleeve 5 and the first chamber 3 to adjust the buffer effect. Compared with the existing oil cylinder buffer adjustment, the oil cylinder and large torque piston and other components need to be disassembled, which has the advantages of simple structure, easy operation, simplified steps of adjusting the buffer effect of the oil cylinder, shortened time of adjusting the buffer effect of the oil cylinder, and improved adjustment time of the buffer effect of the oil cylinder.
[0050] The above-mentioned ideal embodiments of the utility model are for reference, and through the above-mentioned description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined by the scope of claims.
Claims
1. An oil passage built-in cushion cylinder characterized by comprising: The utility model relates to a kind of hydraulic cylinder, comprising: Cylinder (1), and Piston rod (2), the piston rod (2) is located in the cylinder (1), and one end of the piston rod (2) extends to the outside of the cylinder (1), first oil channel (201) and second oil channel (202) are opened in the piston rod (2); Piston (8), the piston (8) is fixed in one end of the piston rod (2); Wherein: the piston (8) divides the inside space of the cylinder (1) into first chamber (3) and second chamber (4), one end of the first oil channel (201) is communicated with the first chamber (3), one end of the second oil channel (202) is communicated with the second chamber (4), and the other end of the first oil channel (201) and the other end of the second oil channel (202) are both located in the outside communication of the cylinder (1).
2. The oil passage built-in cushion cylinder according to claim 1, characterized by Further comprising: Guide sleeve (5), the guide sleeve (5) is sleeved on the outside of the piston rod (2), and the guide sleeve (5) is connected with the cylinder (1).
3. The oil passage built-in cushion cylinder according to claim 2, characterized by Guide sleeve abdominal cavity (501) and gap (502) are formed between the piston rod (2) and the guide sleeve (5), the gap (502) is located in one side of the guide sleeve abdominal cavity (501) close to the first chamber (3), and the guide sleeve abdominal cavity (501) is communicated with the gap (502).
4. The oil passage built-in cushion cylinder according to claim 1, characterized by The oil port of the first oil channel (201) and the first chamber (3) communication position is waist-shaped hole.
5. The oil passage built-in cushion cylinder according to claim 2, characterized by First valve core hole (504) and second valve core hole (505) are opened in the circumferential direction of the guide sleeve (5).
6. The oil passage built-in cushion cylinder according to claim 5, characterized by One-way valve (6) is arranged in the first valve core hole (504).
7. The oil passage built-in cushion cylinder according to claim 5, characterized by Throttle valve (7) is arranged in the second valve core hole (505).
8. The oil passage built-in cushion cylinder according to claim 7, characterized by The second valve core hole (505) and the throttle valve (7) are one-to-one corresponding.
9. The oil passage built-in cushion cylinder according to claim 2, characterized by Retainer (503) is arranged on the end face of the guide sleeve (5) close to the first oil channel (201).
10. The oil passage built-in cushion cylinder according to claim 2, characterized by Sealing assembly (9) is arranged between the guide sleeve (5) and the piston rod (2), and between the cylinder (1) and the piston rod (2).