A refueling valve for a hydraulic system and a fuel line thereof

Abstract

The utility model provides a kind of oiling valve and its oil pipe for hydraulic system, oiling valve for hydraulic system includes shell, ball valve for controlling the on-off of oil circuit in shell, ejector rod, elastic part and oil outlet nozzle, it includes the first cavity, second cavity and third cavity that are sequentially communicated in shell, the diameter of second cavity is greater than the first cavity for shell oil inlet;Oil outlet nozzle is equipped with fourth cavity, fourth cavity oil inlet end communicates second cavity and / or third cavity;Ball valve side corresponds first cavity, ball valve other side corresponds ejector rod, ejector rod connects elastic part first end, elastic part second end connects oil outlet nozzle oil inlet end, oil outlet nozzle is located in third cavity for shell oil outlet, sealing pad is equipped between oil outlet nozzle and third cavity inner side wall;Corresponding third cavity shell end part is equipped with for being resisted with oil outlet nozzle's close-up part.The utility model solves how to realize in prior art can quickly fill hydraulic oil to hydraulic system, saves the problem of manpower cost.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive chassis hydraulic systems, and in particular to a filler valve and its oil pipe for a hydraulic system. Background Technology

[0002] In a car's chassis hydraulic system, if the hydraulic oil level is too low, the entire hydraulic system will lack power, causing the wheels to be unable to absorb shocks. Therefore, maintaining the hydraulic oil pressure in the hydraulic system is crucial, and it is also necessary to be able to quickly add hydraulic oil to the system.

[0003] Previously, when the hydraulic oil pressure was insufficient, in order to add hydraulic oil to the hydraulic system, the entire hydraulic system needed to be disassembled, the hydraulic oil pipes needed to be filled with hydraulic oil, and the entire hydraulic system needed to be replaced. The entire process of adding hydraulic oil was slow, and the disassembly and reassembly of the hydraulic system required a lot of labor costs.

[0004] Therefore, how to quickly add hydraulic oil to the hydraulic system and save labor costs has become a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of this utility model is to provide a filling valve and its oil pipe for a hydraulic system, mainly to solve the problem of how to quickly add hydraulic oil to the hydraulic system and save labor costs in the existing technology.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a refueling valve for a hydraulic system, characterized in that: the refueling valve includes a housing, a ball valve for controlling the opening and closing of the oil passage within the housing, a push rod, an elastic part, and an oil outlet; the housing includes a first cavity, a second cavity, and a third cavity connected in sequence, the diameter of the second cavity being larger than that of the first cavity for oil inlet into the housing; the oil outlet is provided with a fourth cavity, the oil inlet end of the fourth cavity being connected to the second cavity and / or the third cavity;

[0007] One side of the ball valve corresponds to the first cavity, and the other side of the ball valve corresponds to the push rod. The push rod is connected to the first end of the elastic part, and the second end of the elastic part is connected to the oil outlet inlet. The oil outlet is located in the third cavity for oil outlet of the housing. A sealing gasket is provided between the oil outlet and the inner wall of the third cavity.

[0008] The end of the housing corresponding to the third cavity is provided with a constriction section for abutting against the oil outlet nozzle.

[0009] Furthermore, the push rod is hollow inside, and the first end of the push rod is provided with several support parts for abutting against the ball valve. A first concave part is formed between adjacent support parts, and the first concave part connects the second cavity and the hollow part of the push rod.

[0010] Furthermore, the inner top of the support portion of the push rod is provided with an arc surface that matches the surface of the ball valve.

[0011] Furthermore, the support portion of the push rod and the second end of the push rod form a first stepped portion for abutting or connecting with the first end of the elastic portion.

[0012] Furthermore, the oil outlet end is provided with a second stepped portion for abutting or connecting with the second end of the elastic part.

[0013] Furthermore, the outer wall of the oil outlet is provided with a groove, the sealing gasket is located in the groove, and a bushing is provided between the sealing gasket and the groove.

[0014] Furthermore, the outer wall of the oil outlet is also provided with a protrusion, the inner side of the third cavity and the constriction portion form a second concave portion, and the protrusion and the second concave portion match each other; the oil outlet portion near the oil outlet end of the oil outlet is an outer conical surface, and the constriction portion abuts against the outer conical surface.

[0015] Furthermore, the diameter of the third cavity is larger than the diameter of the second cavity.

[0016] Furthermore, the first connection between the first cavity and the second cavity is an inner conical surface; the second connection between the third cavity and the second cavity is an inner conical surface.

[0017] The outer wall of the housing is provided with a bolt part; the third cavity is provided with an external thread corresponding to the outer wall of the housing;

[0018] The elastic part is a spring.

[0019] An oil pipe for a hydraulic system, characterized in that: the oil pipe includes a filling valve for the aforementioned hydraulic system, wherein the external thread of the filling valve is connected to the internal thread of the oil pipe.

[0020] In view of the above technical features, the present invention has the following beneficial effects:

[0021] 1. This utility model discloses a refueling valve for a hydraulic system. The refueling valve is installed on the oil pipe of the hydraulic system. The oil outlet end of the nozzle is embedded in the oil pipe. The refueling needle of the refueling gun is embedded in the first cavity of the housing, increasing the oil pressure in the first cavity. This pushes the ball valve and the push rod to compress the elastic part. At this time, the ball valve moves away from the first connection point between the first and second cavities, forming a channel for hydraulic oil flow. The hydraulic oil flows through the second cavity into the fourth cavity of the nozzle, and then flows out from the oil outlet end of the nozzle back into the oil pipe. This achieves the effect of refueling the oil pipe (quickly adding hydraulic oil to the hydraulic system) using the refueling valve, enabling fast and convenient refueling without disassembling the hydraulic system, saving labor costs. After refueling, the refueling needle of the refueling gun is withdrawn from the first cavity. The oil pressure in the first cavity drops, and the ball valve, under the action of the elastic part, abuts against the first connection point, achieving the sealing effect of the ball valve on the first cavity and preventing hydraulic oil from leaking from the refueling valve into the oil pipe. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a refueling valve used in a hydraulic system in specific embodiment 1.

[0023] Figure 2 The explosion of a refueling valve used in a hydraulic system in specific embodiment 1. Figure 1 .

[0024] Figure 3 The explosion of a refueling valve used in a hydraulic system in specific embodiment 1. Figure 1 .

[0025] Figure 4 yes Figure 1 Sectional view AA (ball valve abuts against the first connection, oil filling valve closed).

[0026] Figure 5 This is a schematic diagram of the internal hydraulic oil flow direction of a filling valve used in a hydraulic system in specific embodiment 1 (the ball valve is separated from the first connection, the filling valve is in the open state, and the arrow indicates the hydraulic oil flow direction).

[0027] In the figure: 1. Shell; 11. First cavity; 12. Second cavity; 13. Third cavity; 14. First connection; 15. Second connection; 16. Second recess; 17. Closure; 18. Bolt; 19. External thread;

[0028] 2. Ball valve;

[0029] 3. Top rod; 31. Support part; 32. First concave part; 33. Hollow part; 34. First stepped part;

[0030] 4. Elastic part; 41. First end of elastic part; 42. Second end of elastic part;

[0031] 5. Sealing gasket;

[0032] 6. Bushing;

[0033] 7. Oil outlet nozzle; 71. Fourth cavity; 72. Second step; 73. Groove; 74. Protrusion; 75. Outer conical surface; 76. Oil outlet end of oil outlet nozzle; 77. Oil inlet end of oil outlet nozzle. Detailed Implementation

[0034] The present invention will be further described 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 present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0035] See Figures 1 to 5In specific embodiment 1, this embodiment 1 provides a refueling valve for a hydraulic system, including a housing 1, a ball valve 2 for controlling the opening and closing of the oil circuit inside the housing 1, a push rod 3, an elastic part 4, and an oil outlet 7. The housing 1 includes a first cavity 11, a second cavity 12, and a third cavity 13 connected in sequence. The diameter of the second cavity 12 is larger than that of the first cavity 11 for oil inlet to the housing 1. The oil outlet 7 is provided with a fourth cavity 71. The oil inlet end of the fourth cavity 71 (i.e., the oil inlet end 77 of the oil outlet) is connected to the second cavity 12 and / or the third cavity 13, so that the hydraulic oil in the second cavity 12 can flow out through the oil outlet 7 and flow into the oil pipe.

[0036] One side of the ball valve 2 corresponds to the first cavity 11, and the other side of the ball valve 2 corresponds to the push rod 3. When the ball valve 2 abuts against the end of the first cavity 11, the ball valve 2 seals the first cavity 11, achieving the effect of closing the filling valve. When the ball valve 2 separates from the first cavity 11, a channel for hydraulic oil to flow is formed between the two. The channel connects the first cavity 11 and the second cavity 12, which facilitates the entry of external hydraulic oil into the filling valve housing 1 and facilitates its smooth flow into the oil pipe of the hydraulic system, thereby realizing the operation of filling the oil pipe of the hydraulic system. The push rod 3 is connected to the first end 41 of the elastic part, and the second end 42 of the elastic part is connected to the oil inlet end 77 of the oil outlet. The elastic part 4 provides the ball valve 2 with the elastic force to block the first cavity 11. When no more hydraulic oil is injected into the first cavity 11, the ball valve 2 is subjected to the pressure drop of the hydraulic oil in the first cavity 11. When the elastic force of the elastic part 4 is greater, the ball valve 2 moves towards the first cavity 11 under the action of the elastic part 4 until the ball valve 2 abuts against the end of the first cavity 11, realizing the blocking effect of the ball valve 2 on the first cavity 11. The oil outlet 7 is located in the third cavity 13 for oil outlet of the housing 1. A sealing gasket 5 is provided between the oil outlet 7 and the inner wall of the third cavity 13. The sealing gasket 5 prevents hydraulic oil from leaking out from the gap between the housing 1 and the oil outlet 7. The oil outlet end 76 of the oil outlet corresponds to the outside of the housing 1, which facilitates the insertion of the oil outlet end 76 into the hydraulic system oil pipe, helping to realize the operation of the oil filling valve to inject oil into the pipe.

[0037] The end of the housing 1 corresponding to the third cavity 13 is provided with a constriction portion 17 for abutting against the oil outlet 7. The constriction portion 17 fixes the oil outlet 7 inside the third cavity 13 to prevent the oil outlet 7 from separating from the housing 1.

[0038] The push rod 3 is hollow inside. The first end of the push rod 3 is provided with several support parts 31 for abutting against the ball valve 2. A first concave part 32 is formed between adjacent support parts 31. The first concave part 32 connects the second cavity 12 and the hollow part 33 of the push rod 3. For example, two support parts 31 form two first concave parts 32. The two first concave parts 32 form a channel from both sides of the push rod 3 into the second cavity 12 and then into the hollow part 33 of the push rod 3, so that the oil in the second cavity 12 can then enter the oil outlet 7 of the third cavity 13 (for example, the fourth cavity 71) more quickly, until it enters the hydraulic system oil pipe from the oil outlet end 76 of the oil outlet.

[0039] The inner side of the top of the support part 31 of the push rod 3 is provided with an arc surface that matches the surface of the ball valve 2, which increases the stability of the relative position between the support part 31 of the push rod 3 and the ball valve 2. Under the action of the elastic part 4, the push rod 3 can better push the ball valve 2 to move towards the first cavity 11, so that after the ball valve 2 abuts against the end of the first cavity 11, the ball valve 2 can be aligned with the first cavity 11, thereby achieving a better sealing effect on the first cavity 11.

[0040] The support portion 31 of the push rod 3 forms a first step portion 34 with the second end of the push rod 3 to abut against the first end 41 of the elastic portion, which facilitates the installation and fixation between the push rod 3 and the elastic portion 4. It is sufficient to insert the second end of the push rod 3 into the elastic portion 4 and abut against the first step portion 34, or the first end 41 of the elastic portion and the first step portion 34 can be connected and fixed.

[0041] The oil outlet inlet end 77 is provided with a second stepped portion 72 for abutting against the second end 42 of the elastic part, which facilitates the installation and fixation between the oil outlet inlet end 77 and the elastic part 4. Simply insert the oil outlet inlet end 77 into the elastic part 4, and the second end 42 of the elastic part abuts against the second stepped portion 72; or the second end 42 of the elastic part is connected and fixed to the second stepped portion 72. The elastic part 4 is a spring.

[0042] The outer wall of the oil outlet 7 is provided with a groove 73, the sealing gasket 5 is located in the groove 73, and a bushing 6 is provided between the sealing gasket 5 and the groove 73. The bushing 6 helps to fix the sealing gasket 5 in the groove 73, ensuring that the position of the sealing gasket 5 does not move, and ensuring the sealing between the oil outlet 7 and the third cavity 13 of the housing 1.

[0043] The outer wall of the oil outlet 7 is also provided with a protrusion 74. The inner side of the third cavity 13 and the constriction portion 17 form a second concave portion 16. The protrusion 74 and the second concave portion 16 match. The portion of the oil outlet 7 near the oil outlet end 76 is an outer conical surface 75. The constriction portion 17 abuts against the outer conical surface 75 to help fix the oil outlet 7 in the third cavity 13. This prevents the oil outlet 7 from moving axially within the third cavity 13.

[0044] The diameter of the third cavity 13 is larger than the diameter of the second cavity 12.

[0045] The first connection 14 between the first cavity 11 and the second cavity 12 has an inner conical surface, which helps the ball valve 2 move to the center of the first cavity 11. When the ball valve 2 abuts against the end of the first cavity 11, the ball valve 2 is located at the center of the first cavity 11 and blocks the first cavity 11, achieving the best sealing effect of the ball valve 2 on the first cavity 11. The second connection 15 between the third cavity 13 and the second cavity 12 also has an inner conical surface.

[0046] The outer wall of the housing 1 is provided with a bolt part 18 (for example, the outer wall of the middle part of the housing 1 is provided with a bolt part 18), and the third cavity 13 is provided with an external thread 19 corresponding to the outer wall of the housing 1. When the filling valve is connected to the hydraulic system oil pipe, the filling valve is turned and rotated by cooperating with the wrench and the bolt part 18, so that the external thread 19 of the filling valve is connected with the corresponding internal thread of the oil pipe, thereby realizing the connection and fixation between the filling valve and the oil pipe.

[0047] In this embodiment 1, a refueling valve for a hydraulic system is installed on the oil pipe of the hydraulic system. At this time, the oil outlet end of the oil nozzle 7 is embedded in the oil pipe. The refueling needle of the refueling gun is embedded in the first cavity 11 of the housing 1, increasing the oil pressure in the first cavity 11. This pushes the ball valve 2 and the push rod 3 to compress the elastic part 4. At this time, the ball valve 2 moves away from the first connection 14 of the first cavity 11 and the second cavity 12, forming a channel for hydraulic oil to flow. The hydraulic oil flows through the second cavity 12 and enters the fourth cavity 71 of the oil outlet 7, and then flows out from the oil outlet end of the oil outlet 7 into the oil pipe. This achieves the effect of refueling the oil pipe (quickly adding hydraulic oil to the hydraulic system) using the refueling valve. It can achieve quick and convenient refueling without disassembling the hydraulic system, saving labor costs. After refueling is completed, the refueling needle of the refueling gun is pulled out from the first chamber 11. The oil pressure in the first chamber 11 drops, and the ball valve 2, under the action of the elastic part 4, abuts against the end of the first chamber 11, realizing the sealing effect of the ball valve 2 on the first chamber 11, and preventing the hydraulic oil in the oil pipe from leaking out of the refueling valve.

[0048] Specific embodiment 2 provides an oil pipe for a hydraulic system, including a filling valve for a hydraulic system as described in specific embodiment 1, wherein the external thread 19 of the filling valve is connected to the internal thread of the oil pipe.

[0049] 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., 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 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. Therefore, they should not be construed as limitations on this invention.

[0050] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A refueling valve for a hydraulic system, characterized by: The refueling valve includes a housing (1), a ball valve (2) for controlling the opening and closing of the oil passage inside the housing (1), a push rod (3), an elastic part (4), and an oil outlet (7). The housing (1) includes a first cavity (11), a second cavity (12), and a third cavity (13) connected in sequence. The diameter of the second cavity (12) is larger than that of the first cavity (11) for oil inlet into the housing (1). The oil outlet (7) is provided with a fourth cavity (71), and the oil inlet end of the fourth cavity (71) is connected to the second cavity (12) and / or the third cavity (13). One side of the ball valve (2) corresponds to the first cavity (11), and the other side of the ball valve (2) corresponds to the push rod (3). The push rod (3) is connected to the first end (41) of the elastic part, and the second end (42) of the elastic part is connected to the oil inlet end (77) of the oil outlet. The oil outlet (7) is located in the third cavity (13) for oil outlet of the housing (1). A sealing gasket (5) is provided between the oil outlet (7) and the inner wall of the third cavity (13). The end of the housing (1) corresponding to the third cavity (13) is provided with a constriction part (17) for abutting against the oil outlet (7).

2. The refueling valve for a hydraulic system according to claim 1, characterized in that: The push rod (3) is hollow inside. The first end of the push rod (3) is provided with several support parts (31) for abutting against the ball valve (2). A first concave part (32) is formed between adjacent support parts (31). The first concave part (32) connects the second cavity (12) and the hollow part (33) of the push rod (3).

3. The oil filling valve for a hydraulic system according to claim 2, characterized in that: The top inner side of the support part (31) of the push rod (3) is provided with an arc surface that matches the surface of the ball valve (2).

4. A filling valve for a hydraulic system according to claim 3, characterized in that: The support portion (31) of the push rod (3) forms a first step portion (34) with the second end of the push rod (3) for abutting or connecting with the first end (41) of the elastic portion.

5. A filling valve for a hydraulic system according to claim 4, characterized in that: The oil outlet inlet end (77) is provided with a second stepped portion (72) for abutting or connecting with the second end (42) of the elastic part.

6. A filling valve for a hydraulic system according to claim 5, characterized in that: The outer wall of the oil outlet (7) is provided with a groove (73), the sealing gasket (5) is located in the groove (73), and a bushing (6) is provided between the sealing gasket (5) and the groove (73).

7. A filling valve for a hydraulic system according to claim 6, characterized in that: The outer wall of the oil outlet (7) is also provided with a protrusion (74), the inner side of the third cavity (13) and the concave part (17) form a second concave part (16), the protrusion (74) and the concave part (16) match; the oil outlet (7) near the oil outlet end (76) of the oil outlet is an outer conical surface (75), and the concave part (17) abuts against the outer conical surface (75).

8. A filling valve for a hydraulic system according to claim 7, characterized in that: The diameter of the third cavity (13) is larger than the diameter of the second cavity (12).

9. A filling valve for a hydraulic system according to claim 8, characterized in that: The first connection point (14) between the first cavity (11) and the second cavity (12) is an inner conical surface; the second connection point (15) between the third cavity (13) and the second cavity (12) is an inner conical surface; The outer side wall of the housing (1) is provided with a bolt part (18); the third cavity (13) is provided with an external thread (19) corresponding to the outer side wall of the housing (1); The elastic part (4) is a spring.

10. An oil pipe for a hydraulic system, characterized in that: The oil pipe includes a refueling valve for a hydraulic system as described in claim 9, wherein the external thread (19) of the refueling valve is connected to the internal thread of the oil pipe.

Images