CN217783907U - Optimized pressure release valve stroke-increasing structure and oil cylinder using same - Google Patents
Optimized pressure release valve stroke-increasing structure and oil cylinder using same Download PDFInfo
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- CN217783907U CN217783907U CN202221199793.0U CN202221199793U CN217783907U CN 217783907 U CN217783907 U CN 217783907U CN 202221199793 U CN202221199793 U CN 202221199793U CN 217783907 U CN217783907 U CN 217783907U
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- relief valve
- round pin
- pin axle
- pressure relief
- piston
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Abstract
The utility model provides a relief valve of optimizing increases journey structure and uses its hydro-cylinder relates to the hydraulic pressure technology field, including pressure relief valve subassembly and round pin axle subassembly, the relief valve subassembly comprises relief valve and base, round pin axle unit mount is in relief valve subassembly top, through spring coupling between the two, round pin axle subassembly includes first round pin axle, and the cover is established at first epaxial second round pin axle of round pin and elastic component, the terminal threaded connection of first round pin axle has the nut, second round pin axle and nut are spacing at first round pin epaxially with the elastic component. The problem of among the prior art relief valve increase journey structure round pin axle and dish spring dispersion installation, dish spring installation distance is uncontrollable, dish spring installation difficulty to and the slow technique of response time is opened to the relief valve is solved.
Description
Technical Field
The utility model relates to a hydraulic pressure technical field, concretely relates to relief valve of optimizing increases journey structure and uses its hydro-cylinder.
Background
The pressure relief valve can be used to the pressure release of high-pressure side when the piston moves to realize the buffering, install the valve in the piston, the valve rod exceeds piston terminal surface 1.2mm, and when the piston moved to the stroke last 1.2mm, the valve rod contacted end cover, the compression, the pressure release of piston high-pressure side.
In the prior art, as a utility model patent with application number CN201720702416.7 discloses a relief valve, and specifically discloses: the pressure relief valve is arranged on a piston in a piston cylinder and comprises a base and a valve rod arranged below the base, a first elastic part is arranged on the base, the upper end of the first elastic part is connected with a first pin shaft, a second pin shaft is arranged on the first pin shaft, a second elastic part is connected between the first pin shaft and the second pin shaft, the upper end of the second pin shaft stretches out of the surface of the piston, the length of the second pin shaft stretching out of the surface of the piston is the pressure relief stroke of the piston, and the valve rod partially stretches out of the base.
In the application, the first pin shaft, the second pin shaft and the disc springs between the first pin shaft and the second pin shaft are installed in a scattered mode, the disc springs need to be installed in the piston installation holes in a stacked mode in the installation process, the installation distance of the disc springs is not controllable, and the installation is more difficult when the number of the disc springs is larger; secondly, the disc spring is in a free state initially, the pressure relief structure cannot respond at the first time, the disc spring needs to be compressed to a certain amount, pressure relief can be achieved only after the load reaches the pressure of opening the valve, unloading response time is slow, and damage to the end cover is prone to occurring.
SUMMERY OF THE UTILITY MODEL
In order to solve the decompression valve and increase round pin axle and dish spring dispersion installation among the journey structure among the prior art, dish spring installation distance is uncontrollable, dish spring installation difficulty to and the slow technical problem of response time is opened to the decompression valve, the utility model provides a decompression valve of optimization increases journey structure and uses its hydro-cylinder, has solved above-mentioned technical problem. The technical scheme of the utility model as follows:
an optimized pressure relief valve range-extending structure comprising: the pressure relief valve assembly comprises a pressure relief valve and a pin shaft assembly, the pressure relief valve assembly comprises a pressure relief valve and a base, the pin shaft assembly is installed above the pressure relief valve assembly and is connected with the pressure relief valve assembly through a spring, the pin shaft assembly comprises a first pin shaft, a second pin shaft and an elastic piece are sleeved on the first pin shaft, the tail end of the first pin shaft is in threaded connection with a nut, and the elastic piece is limited on the first pin shaft through the second pin shaft and the nut.
According to the utility model discloses an embodiment, second round pin axle hole forms first spacing portion with first round pin axle head portion, second round pin axle surface forms the spacing portion of second with the piston.
According to the utility model discloses an embodiment, the second round pin axle stretches out the piston surface, first round pin axle and piston surface parallel and level or be less than the piston surface.
According to the utility model discloses an embodiment, the nut lower extreme is equipped with spacing step portion, the spring housing is on the nut step.
According to an embodiment of the present invention, the elastic member is a disc spring or a coil spring, and the elastic member has an initial compression amount.
According to the utility model discloses an embodiment, the relief valve is installed in the base valve hole, and the valve rod stretches out the base upper surface.
According to the utility model discloses an embodiment, the base upper surface is equipped with pressure relief groove.
An oil cylinder comprises a cylinder body, wherein end covers and a cylinder bottom are respectively assembled at openings at two ends of the cylinder body; the piston, the piston both ends are equipped with the mounting hole, and downthehole the decompression valve that installs aforesaid optimizes increases journey structure.
According to the utility model discloses an embodiment, be equipped with the pressure release hole that fluid circulates between intercommunication end cover side appearance chamber and relief valve on the piston.
Based on the technical scheme, the utility model discloses the technological effect that can realize does:
1. the utility model discloses a relief valve increases journey structure utilizes first round pin axle, second round pin axle and nut cooperation, with the elastic component spacing between round pin axle and nut, can increase its pressure release stroke on the basis that does not change original relief valve structure to still can control the installation distance of elastic component through the nut, adjust the initial compression state of elastic component, reach the required thrust of pressure release load, when can making the piston move to the end cover, the relief valve is opened response time and is shorter, reduces the impact that the piston produced to the end cover;
2. the utility model discloses a relief valve increases journey structure will sell axle and elastic component integral erection, can install in advance and put into the piston again after, installs more portably, has improved the integral erection efficiency that the relief valve increases journey structure.
Drawings
Fig. 1 is a schematic structural view of the range extending structure of the pressure release valve of the present invention;
fig. 2 is a schematic structural view of the pin shaft assembly of the present invention;
FIG. 3 is a schematic structural view of the pressure relief valve assembly of the present invention;
fig. 4 is a schematic structural view of a base in the relief valve assembly of the present invention;
fig. 5 is a schematic structural view of the oil cylinder of the present invention;
in the figure: 1-a pin shaft assembly; 11-a first pin; 12-a second pin; 121-a first limiting part; 122-a second limiting part; 13-an elastic member; 14-a nut; 141-a spacing step; 15-a spring;
2-a pressure relief valve assembly; 3, a pressure release valve; 31-a valve stem; 4-a base; 41-valve hole; 42-a pressure relief groove;
5-a piston; 51-mounting holes; 52-pressure relief vent; 6-cylinder bottom; 7-cylinder body; 8-end cap.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 4, the present embodiment provides an optimized pressure relief valve range extending structure, which includes a pressure relief valve assembly 2 and a pin assembly 1, where the pressure relief valve assembly 2 is composed of a pressure relief valve 3 and a base 4, where the pressure relief valve 3 is preferably a SUN hydraulics standard pressure relief valve (CDAP type).
The pin shaft assembly 1 comprises a first pin shaft 11, a second pin shaft 12 and an elastic part 13, wherein the second pin shaft 12 and the elastic part 13 are sleeved on the first pin shaft 11, the elastic part 13 can select disc springs or spiral springs with different rigidity according to the requirement of the required pressure relief stroke, the tail end of the first pin shaft 11 is in threaded connection with a nut 14, one end of the elastic part 13 is connected with the nut 14, and the other end of the elastic part is connected with the second pin shaft 12; the first pin shaft 11 consists of a head part and a rod body, a screwing groove convenient for screwing the nut 14 is formed in the upper surface of the head part of the first pin shaft 11, a first limiting part 121 is formed in the inner hole of the second pin shaft 12 and the head part of the first pin shaft 11 in a machining mode and used for limiting the axial movement of the first pin shaft 11, and a second limiting part 122 is formed in the outer surface of the second pin shaft 12 and the piston 5 in a machining mode and used for limiting the installation position of the pin shaft assembly 1 on the piston 5; through on bunching second round pin axle 12 to first round pin axle 11, then install elastic component 13 on first round pin axle 11 to utilize nut 14 and tight, make elastic component 13 possess the initial compression volume of opening 3 required loads of relief valve, can increase substantially the installation effectiveness, and elastic component 13's originated compression state can be adjusted according to the demand, shortens relief valve 3 and opens response time, realizes longer pressure release stroke.
As shown in fig. 3, a valve hole 41 for installing the pressure relief valve 3 is formed in the central axis of the base 4, the valve hole 41 is a through hole, the shape of the valve hole 41 is processed according to the shape of the pressure relief valve 3, the pressure relief valve 3 is screwed into the valve hole 41 of the base in a threaded fixing mode, and the outer surface of the pressure relief valve 3 and the valve hole 41 of the base 4 are sealed through a sealing member; wherein, the valve rod 31 of the pressure relief valve extends out of the upper surface of the base 4 and is connected with the lower surface of the first pin shaft 11 through a gap; a spring 15 is arranged between the pressure relief valve assembly 2 and the pin shaft assembly 1, one end of the spring 15 is connected with the upper surface of the pressure relief valve base 4, the other end of the spring 15 is connected with the lower surface of a pin shaft assembly nut 14, a limiting step portion 141 is arranged at the lower end of the nut 14, the spring 15 is sleeved on the step of the nut 14 and extends out of the nut 14 to be in contact with the pressure relief valve base 4, and the limiting step portion 141 provides axial and radial limiting effects for the spring 14, so that the spring 15 is prevented from being stressed unevenly and inclined in the compression process; utilize spring 15 to support pin shaft subassembly 1, can overcome pin shaft subassembly 1 action of gravity, prevent that it extrudees relief valve rod 31 under the initial condition, cause the relief valve 3 to become invalid.
As the preferred technical scheme of this embodiment, still be equipped with pressure relief groove 42 on the base 4, during the pressure relief, round pin axle subassembly 1 promotes valve rod 31 and makes relief valve 3 open, and round pin axle subassembly 1 lower extreme supports to detain on base 4, and fluid flows out from pressure relief groove 42 through relief valve 3.
As shown in fig. 5, the present embodiment further provides an oil cylinder, which includes a piston 5, a cylinder body 7, a cylinder bottom 7 and an end cover 8 assembled at two ends of the cylinder body, where two ends of the piston 5 are provided with mounting holes 51, and the optimized pressure relief valve range extending structure is mounted in the mounting holes, where an upper end of a second pin 12 extends out of a surface of the piston 5, and preferably, an upper surface of a first pin 11 is flush with a surface of the piston 5 or lower than the surface of the piston 5, so as to prevent the first pin 11 from striking the end cover 8 when the piston 5 moves to the end cover 8, and causing damage to the end cover 8; the second limiting part 122 between the outer surface of the second pin shaft 12 and the piston 5 is designed and processed into a step shape, so that the concentricity of the second pin shaft 12 and the piston 5 is increased, and a limiting effect is generated on the second pin shaft 12; during installation, the pin shaft assembly 1 and the pressure relief valve assembly 2 are sequentially arranged in the installation holes 51 at the two ends of the piston 5 and are fixed through screws.
As a preferred technical solution of this embodiment, a pressure relief hole 52 is further provided at a joint of the pin shaft assembly 1 and the pressure relief valve assembly 2 in the mounting hole 51 at both ends of the piston 5, so as to facilitate the oil flow between the cylinder bottom 6 side and the end cover 8 side when the pressure relief valve 3 is opened.
Based on above-mentioned structure, the hydro-cylinder of this embodiment is in the course of the work, piston 5 is from cylinder bottom 6 to the motion of end cover 8, end cover 8 promotes second round pin axle 12 downstream, because elastic component 13 has initial compression volume between first round pin axle 11 and second round pin axle 12, possess and open the required load of relief valve 3, under the effect of elastic component 13 elastic force, first round pin axle 11 can the fast response, it makes relief valve 3 open to promote valve stem 31, the high-pressure oil between piston 5 and cylinder bottom 6 passes through relief valve 3 internal channel, flow into the appearance chamber between piston 5 and end cover 8 from pressure release groove 42 on base 4 and pressure release hole 52 on the piston 5 in proper order, realize the pressure release.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. The utility model provides a relief valve of optimizing increases journey structure, includes relief valve subassembly (2) and round pin axle subassembly (1), relief valve subassembly (2) comprises relief valve (3) and base (4), round pin axle subassembly (1) is installed in relief valve subassembly (2) top, connects through spring (15) between the two, a serial communication port, round pin axle subassembly (1) includes first round pin axle (11), and the cover is established second round pin axle (12) and elastic component (13) on first round pin axle (11), first round pin axle (11) end threaded connection has nut (14), second round pin axle (12) and nut (14) are spacing on first round pin axle (11) with elastic component (13).
2. The optimized pressure relief valve range extending structure of claim 1, wherein a first limiting portion (121) is formed by the inner hole of the second pin shaft (12) and the head of the first pin shaft (11), and a second limiting portion (122) is formed by the outer surface of the second pin shaft (12) and the piston (5).
3. An optimized pressure relief valve range extending structure according to claim 2, characterized in that the second pin (12) extends out of the surface of the piston (5), and the first pin (11) is flush with the surface of the piston (5) or lower than the surface of the piston (5).
4. The optimized pressure relief valve stroke-increasing structure of the claim 1 is characterized in that the lower end of the nut (14) is provided with a limiting step part (141), and the spring (15) is sleeved on the nut step.
5. An optimized pressure relief valve stroke lengthening structure according to claim 1, characterized in that the elastic member (13) is a disc spring or a spiral spring, and the elastic member (13) has an initial compression amount.
6. An optimized pressure relief valve stroke lengthening structure according to claim 1, characterized in that the pressure relief valve (3) is installed in a base valve hole (41), and the valve rod (31) extends out of the upper surface of the base (4).
7. An optimized pressure relief valve range lengthening structure according to claim 6, characterized in that the upper surface of the base (4) is provided with a pressure relief groove (42).
8. An oil cylinder comprises a cylinder body (7), wherein a cylinder bottom (6) and an end cover (8) are respectively assembled at openings at two ends of the cylinder body (7); the piston (5), both ends of piston (5) are equipped with mounting hole (51), are equipped with the range-extending structure of the pressure relief valve that optimizes of any claim 1-7 in the downthehole.
9. The oil cylinder according to claim 8, characterized in that the piston (5) is provided with a pressure relief hole (52) for communicating oil between the side cavity of the end cover (8) and the pressure relief valve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221199793.0U CN217783907U (en) | 2022-05-19 | 2022-05-19 | Optimized pressure release valve stroke-increasing structure and oil cylinder using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221199793.0U CN217783907U (en) | 2022-05-19 | 2022-05-19 | Optimized pressure release valve stroke-increasing structure and oil cylinder using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217783907U true CN217783907U (en) | 2022-11-11 |
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ID=83909619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221199793.0U Active CN217783907U (en) | 2022-05-19 | 2022-05-19 | Optimized pressure release valve stroke-increasing structure and oil cylinder using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217783907U (en) |
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2022
- 2022-05-19 CN CN202221199793.0U patent/CN217783907U/en active Active
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