CN218266605U - Oil pump pressure control assembly - Google Patents

Abstract

The utility model discloses an oil pump pressure control component, in the utility model, an upward flow channel and a downward flow channel are arranged in a hydraulic oil pump at the same time, so as to drive a piston head, and the piston head can drive a warped piece to more rapidly complete the warping and folding work; meanwhile, the confluence cavity is horizontally arranged, and the confluence cavity, the upper inclined outlet, the lower inclined outlet, the upper inclined pressure control valve and the lower inclined pressure control valve are symmetrically arranged, so that the oil pressure of the electric hydraulic lifting device and the oil pressure of the electric hydraulic lifting device are both corresponding to the oil pressure of the lifting oil or the furled oil; therefore, the lifted piece matched with the electric hydraulic lifting device can be lifted more uniformly and stably no matter the lifted piece is lifted or folded; therefore, the speed of the electric hydraulic lifting device is consistent whether the lifted piece is lifted or folded, and the electric hydraulic lifting device is convenient to operate and safer.

Description

Oil pump pressure control assembly

Technical Field

The utility model relates to a hydraulic equipment's manufacturing and designing field, more specifically the utility model relates to a pressure-controlled subassembly of oil pump that says so.

Background

The hydraulic equipment is widely applied in the industrial and civil industries; the hydraulic system has the effects that the hydraulic cylinder and the hydraulic motor of the actuating element of the hydraulic system are used for converting the pressure energy of liquid into mechanical energy so as to obtain required linear reciprocating motion or rotary motion; the elements can be modified freely according to the action to be designed to achieve the work to be completed; the hydraulic lifting device is a common hydraulic device, and can be used in a series of environments such as material handling, device lifting and closing, device positioning and the like.

The hydraulic pressure rises to stick up the ware at present on the market and is accomplishing the back of warping, rises to stick up the piece with hydraulic pressure and can be positioned at certain angle of warping, and hydraulic pressure rises to stick up the device and because no longer pressurizeing, the condition of pressure release can appear, leads to being diminished by the angle of warping up of piece gradually, leads to being unable to keep at certain height and angle by the piece of warping up.

The pressure control valve is used for controlling and regulating the pressure of liquid flow in a hydraulic system; such valves operate on the principle that the fluid pressure and spring force acting on the spool are balanced; in general, a pressure control valve is usually adopted to block high-pressure oil which falls back for the condition of gradual pressure relief in hydraulic equipment; usually, the valve body is a cone valve made of hard material, and the oil pump is also made of hard material, so that when the cone valve blocks the oil outlet of the oil outlet channel, the cone valve inevitably wears the oil pump, and the sealing effect is poorer and poorer.

Under the normal condition, when the hydraulic lifting device is only provided with the lifting piston of the upward-inclined oil way, the lifted piece is lifted, and when the lifted piece needs to be folded, the piston falls back only in a pressure relief mode, but the folding speed of the hydraulic lifting device is too high due to direct pressure relief, so that the operation is difficult, the control is not good, and even the situations that personnel are injured or the lifted piece is damaged occur; therefore, the upward inclined oil path and the downward inclined oil path are usually arranged at the same time to realize the slow speed of the hydraulic lifting device, but if the oil pressures in the upward inclined oil path and the downward inclined oil path are inconsistent, the lifted piece is folded and the speed is inconsistent when lifted, so that people are inconvenient to judge the lifting and folding time, and further danger is caused; therefore, an oil pump pressure control assembly which is uniform, stable and consistent in oil outlet of each oil way, safe to use, stable in sealing and free of pressure relief is needed.

Disclosure of Invention

The utility model overcomes prior art's is not enough, provides simple structure, reasonable in design, each oil circuit oil-out even, stable, unanimous, safe in utilization, the stable oil pump voltage-controlled subassembly that does not release pressure of sealed.

In order to solve the technical problem, the technical scheme of the utility model as follows:

an oil pump pressure control assembly is arranged in a hydraulic oil pump, and a converging cavity, an upward inclined flow passage and a downward inclined flow passage are arranged in the hydraulic oil pump; the upward inclined flow channel and the downward inclined flow channel are communicated with the confluence cavity; an upper inclined outlet and a lower inclined outlet are arranged at two ends of the converging cavity, an upper inclined pressure control valve is arranged at the upper inclined outlet, and a lower inclined pressure control valve is arranged at the lower inclined outlet; a movable reciprocating valve is arranged between the upper tilting pressure control valve and the lower tilting pressure control valve; the oil outlet channel of the upward inclined flow channel is arranged between the upward inclined pressure control valve and the reciprocating valve, and the oil outlet channel of the downward inclined flow channel is arranged between the downward inclined pressure control valve and the reciprocating valve.

Further, the confluence cavity is horizontally arranged; the confluence cavity, the upper inclined outlet, the lower inclined outlet, the upper inclined pressure control valve and the lower inclined pressure control valve are symmetrically arranged.

Furthermore, the upper inclined pressure control valve and the lower inclined pressure control valve respectively comprise a mounting part and a pressure control movable part; the installation part is internally provided with a movable space which is provided with an inlet and an outlet; the pressure-controlled movable part is movably arranged in the movable space, and a sealing piece made of soft material is arranged on the pressure-controlled movable part and closes or opens the inlet along with the movement of the pressure-controlled movable part.

Further, the outer surfaces of the upper inclined pressure control valve and the lower inclined pressure control valve are provided with sealing rings, and the sealing rings are positioned between the inlet and the outlet; the inlet is arranged on one side facing the oil outlet channel, and the outlet corresponds to the upward inclined outlet and the downward inclined outlet.

Furthermore, one end of the pressure-controlled movable part, which is close to the inlet, is provided with a sealing column, and the inlet is positioned on a movable path of the sealing column; the seal is fitted over the seal post.

Further, the sealing column comprises a first area and a second area, wherein the diameter of the first area is smaller than that of the second area; the sealing element is provided with an assembling through hole, and the inner diameter of the assembling through hole corresponds to the diameter of the first area; and one end of the sealing element close to the inlet is provided with an assembly groove, the inner diameter of the assembly groove corresponds to the diameter of the second area, and the second area is matched with the assembly groove.

Further, still include the pressure-controlled portion that resets, the pressure-controlled portion that resets sets up in the activity space, contacts with the inner wall and the pressure-controlled movable part of activity space, provides the effort of direction and promotion for the reseing of pressure-controlled movable part.

Furthermore, the pressure control reset part adopts a compression spring; one end of the pressure-controlled movable part, which is far away from the sealing column, is provided with a reset column, one end of a compression spring is sleeved on the reset column, and the other end of the compression spring is contacted with the inner wall of the movable space.

Furthermore, the movable space is cylindrical, and the pressure-controlled movable part is prismatic; the sealing element is made of rubber.

Furthermore, the mounting part is detachable and comprises a valve seat and a screw plug, and the valve seat and the screw plug are respectively detachably assembled in a pipeline of the hydraulic oil pump; the valve seat and the screw plug are both internally provided with internal spaces, and the internal spaces of the valve seat and the screw plug are matched to form a movable space; the inlet and the outlet are arranged on the valve seat, wherein the inlet is arranged at one end of the valve seat far away from the screw plug, and the outlet is arranged on the side surface of the valve seat; sealing rings are arranged on the outer surfaces of the valve seat and the plug screw; the outlet is arranged between the valve seat and the sealing ring of the screw plug, and the sealing ring of the valve seat is arranged between the inlet and the outlet.

The utility model has the advantages that:

in the utility model, the hydraulic oil pump is internally provided with an upward inclined flow passage and a downward inclined flow passage simultaneously, so as to drive the piston head to drive the lifted piece to more rapidly complete the lifting and folding work; meanwhile, the confluence cavity is horizontally arranged, and the confluence cavity, the upper inclined outlet, the lower inclined outlet, the upper inclined pressure control valve and the lower inclined pressure control valve are symmetrically arranged, so that the oil pressure of the electric hydraulic lifting device and the oil pressure of the electric hydraulic lifting device are both corresponding to the oil pressure of the lifting oil or the furled oil; therefore, the lifted piece matched with the electric hydraulic lifting device can be lifted more uniformly and stably no matter the lifted piece is lifted or folded; therefore, the speed of the electric hydraulic lifting device is consistent whether the lifted piece is lifted or folded, and the electric hydraulic lifting device is convenient to operate and safer.

In general, a pressure control valve is usually adopted to block high-pressure oil which falls back for the condition of gradual pressure relief in hydraulic equipment; the common valve body is a cone valve made of hard materials, and the oil pump is also made of hard materials, so that when the cone valve shields an oil outlet of the oil outlet channel, the cone valve and the oil pump are inevitably abraded, and the sealing effect is poorer and poorer; in the utility model, the inlet is sealed by the sealing element made of soft material, and the sealing effect is better due to the property of the material; compared with the hard contact of the traditional cone valve, the utility model greatly reduces the abrasion of the valve body by the soft contact mode; meanwhile, when the fallen high-pressure oil is filled in the movable space, the pressure-controlled movable part is pushed to enable the sealing element to seal the inlet, and when the pressure of the returned oil is higher, the sealing element is more tightly sealed.

The utility model discloses in, the setting of sealing washer is avoided fluid to skip the utility model discloses directly flow out.

The utility model discloses in, the setting of sealing column is convenient for the assembly of sealing member to the home range of voltage-controlled movable part also can be injectd, the effect of direction is played, avoids voltage-controlled movable part the skew to appear and leads to the unable sealed entry of sealing member.

The utility model discloses in, the setting of first region, second region, assembly through-hole and assembly groove makes the installation of sealing washer more firm stable.

In the utility model, the pressure control reset part is arranged, so that the pressure control movable part can be reset under the guidance and the promotion of the pressure control reset part after being reopened by the oil liquid of the hydraulic oil pump; when the movable space is filled with the fallen high-pressure oil, the inlet is closed by the sealing element.

The utility model discloses in, the setting of post that resets makes the cooperation between voltage-controlled movable part and the compression spring more inseparable, also plays the direction simultaneously and promotes the effect that resets, avoids voltage-controlled movable part skew to appear.

The utility model discloses in, the activity space is cylindricly, and voltage-controlled movable part is the prism form for there is certain clearance between the inner wall of voltage-controlled movable part and activity space, the fluid of being convenient for passes through.

In the utility model, the mounting part can be disassembled and comprises the valve seat and the screw plug, so that the sealing element of the utility model can be replaced when aging occurs; simultaneously the detachable installation department is also convenient right the utility model discloses dismantle and assemble.

Drawings

Fig. 1 is an overall structure diagram of an electro-hydraulic tilting device.

FIG. 2 is a cross-sectional view of an electro-hydraulic lifter.

Figure 3 is a cross-sectional view of the hydraulic cylinder and piston arrangement.

FIG. 4 is a cross-sectional view of the piston head.

Fig. 5 is a structural view of an oil pump.

Fig. 6 is a sectional view of an assembly space of the oil pump gear.

Fig. 7 is a sectional view of the oil pump gear at the pressure control valve.

Fig. 8 is a structural view of an oil pump mount.

Fig. 9 is a structural view of an oil pump lower cover.

Fig. 10 is a structure view of the oil pump seat and the oil pump lower cover.

Fig. 11 is a structural view at an oil inlet passage.

Fig. 12 is a sectional view of the pressure control valve.

FIG. 13 is a cross-sectional view of an electro-hydraulic lifter.

Fig. 14 is a sectional view of a relief overflow valve.

Fig. 15 is a structural view of the pressure-controlled movable portion.

FIG. 16 is a cross-sectional view of the mating of the sealing post and the sealing member.

Reference numbers in the figures:

1. a motor; 2. an oil pump; 3. a piston; 4. an oil cylinder; 5. a pressure-controlled valve; 6. a manifold base; 7. a pressure relief overflow valve; 8. a plug; 20. a pressurizing assembly; 21. a flow channel; 22. an upward inclined flow channel; 23. a declined flow channel; 24. a pressure relief flow passage; 25. a shared flow channel; 26. an oil inlet channel; 27. an oil outlet channel; 28. a current limiting assembly; 29. a manifold chamber; 31. a piston head; 32. a piston rod; 41. a reserve tube; 42. a hydraulic cylinder; 51. an installation part; 52. a pressure-controlled movable part; 53. a voltage-controlled reset section; 54. an inlet; 55. an outlet; 56. an upper-inclination pressure control valve; 57. a down tilt pressure control valve; 58. a shuttle valve; 61. an engagement channel; 62. a down-dip joining channel; 63. an upward-inclined connecting channel; 64. a manual drain channel; 65. a manual drain valve; 66. an overflow channel; 67. a pressure relief through hole; 71. a pressure relief movable part; 72. a pressure relief reset portion; 73. an assembling portion; 201. an oil pump mount; 202. an oil pump lower cover; 203. an oil pump upper cover; 204. a lower assembly space; 205. an upper assembly space; 206. a gear assembly space; 207. a filter; 208. a gear; 261. an oil intake area; 262. a current limiting region; 281. steel balls; 291. an upward-inclined outlet; 292. a declined outlet; 311. positioning the piston; 312. an impact piston; 313. an impinging return valve; 314. impacting the overflow valve; 411. an oil filling port; 412. an oil cover; 421. a hydraulic space; 422. a cylinder body; 423. an end cap; 424. an upward inclined channel; 425. a downtilt channel; 426. a pressure relief channel; 511. an activity space; 512. a seal ring; 513. a valve seat; 514. a plug screw; 521. a reset column; 522. sealing the column; 523. a seal member; 524. a first region; 525. a second region; 526. assembling the through hole; 527. assembling a groove; 531. a compression spring; 711. a first movable block; 712. a second movable block; 713. a joining block; 731. a movable pressure relief space; 732. a pressure relief inlet; 733. a common pressure relief outlet; 734. a high pressure relief outlet; 735. and (4) a sealing ring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific illustrations of the present invention, and the purpose of the present invention is to make the technical solutions of the present invention better understood by those skilled in the art, and should not be considered as limitations of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

as shown in fig. 7, 12, 15, and 16, a pressure-controlled assembly of an oil pump 2 is disposed in a hydraulic oil pump 2, and a converging cavity 29, an upward-inclined flow passage 22, and a downward-inclined flow passage 23 are disposed in the hydraulic oil pump 2; the upward inclined flow passage 22 and the downward inclined flow passage 23 are communicated with a confluence cavity 29; an upper inclined outlet 291 and a lower inclined outlet 292 are arranged at two ends of the confluence cavity 29, an upper inclined pressure control valve 56 is arranged at the upper inclined outlet 291, and a lower inclined pressure control valve 57 is arranged at the lower inclined outlet 292; a movable reciprocating valve 58 is arranged between the upper inclined pressure control valve 56 and the lower inclined pressure control valve 57; the oil outlet passage 27 of the upper-inclination flow passage 22 is provided between the upper-inclination pressure control valve 56 and the shuttle valve 58, and the oil outlet passage 27 of the lower-inclination flow passage 23 is provided between the lower-inclination pressure control valve 57 and the shuttle valve 58; the converging cavity 29 is horizontally arranged; the confluence cavity 29, the upper inclined outlet 291, the lower inclined outlet 292, the upper inclined pressure control valve 56 and the lower inclined pressure control valve 57 are symmetrically arranged; in the embodiment, the hydraulic oil pump 2 is internally provided with the upward inclined flow passage 22 and the downward inclined flow passage 23 at the same time, so that the piston head is driven, and the lifted piece is driven by the piston head to finish lifting and folding work more quickly; meanwhile, because the confluence chamber 29 is horizontally arranged, and the confluence chamber 29, the upper inclined outlet 291, the lower inclined outlet 292, the upper inclined pressure control valve 56 and the lower inclined pressure control valve 57 are symmetrically arranged, the oil pressure of the electric hydraulic lifter is corresponding to that of the electric hydraulic lifter regardless of the oil for driving lifting or the oil for driving closing; therefore, the lifted piece matched with the electric hydraulic lifting device can be lifted more uniformly and stably no matter the lifted piece is lifted or folded; therefore, the speed of the electric hydraulic lifting device is consistent whether the lifted piece is lifted or folded, and the electric hydraulic lifting device is convenient to operate and safer.

The upper-tilt pressure control valve 56 and the lower-tilt pressure control valve 57 each include a mounting portion 51 and a pressure-controlled movable portion 52; a movable space 511 is provided in the mounting portion 51, and an inlet 54 and an outlet 55 are provided in the movable space 511; the pressure-controlled movable part 52 is movably arranged in the movable space 511, and a sealing member 523 made of soft material is arranged on the pressure-controlled movable part 52 to close or open the inlet 54 along with the movement of the pressure-controlled movable part 52; in general, for the situation of gradual pressure relief in hydraulic equipment, a pressure control valve 5 is usually adopted to block the fallen high-pressure oil; a common valve body is a cone valve made of hard materials, and the oil pump 2 is also made of hard materials, so that when the cone valve shields an oil outlet of the oil outlet channel 27, the cone valve and the oil pump 2 are inevitably abraded, and the sealing effect is increasingly poor; in the present invention, the inlet 54 is sealed by the sealing member 523 made of soft material, so that the sealing effect is better due to the material property; compared with the hard contact of the traditional cone valve, the utility model greatly reduces the abrasion of the valve body by the soft contact mode; meanwhile, when the high-pressure oil that falls back fills the movable space 511, the pressure-controlled movable portion 52 is pushed to close the inlet 54 by the sealing member 523, and the sealing member 523 is closed more tightly as the pressure of the returned oil is higher.

The outer surfaces of the upper inclined pressure control valve 56 and the lower inclined pressure control valve 57 are provided with sealing rings 512, and the sealing rings 512 are positioned between the inlet 54 and the outlet 55; the inlet 54 is provided on the side facing the oil outlet passage 27, and the outlet 55 corresponds to the upper inclined outlet 291 and the lower inclined outlet 292; the setting of sealing washer 512 can avoid fluid to skip the utility model discloses directly flow out.

In the present embodiment, one end of the pressure-controlled movable portion 52 near the inlet 54 is provided with a sealing column 522, and the inlet 54 is located on the moving path of the sealing column 522; the seal 523 is fitted over the seal post 522; the sealing post 522 is provided to facilitate the assembly of the sealing member 523, and also can limit the movable range of the pressure-controlled movable part 52, so as to play a role in guiding and avoid the situation that the sealing member 523 cannot close the inlet 54 due to the deviation of the pressure-controlled movable part 52.

In this embodiment, the sealing post 522 includes a first region 524 and a second region 525, wherein the diameter of the first region 524 is smaller than the diameter of the second region 525; the sealing member 523 is provided with an assembling through hole 526, and the inner diameter of the assembling through hole 526 corresponds to the diameter of the first area 524; a fitting groove 527 is provided at one end of the sealing member 523 near the inlet 54, the inner diameter of the fitting groove 527 corresponds to the diameter of the second region 525, and the second region 525 is fitted with the fitting groove 527; the arrangement of the first region 524, the second region 525, the fitting through hole 526 and the fitting groove 527 makes the installation of the seal ring 512 more stable.

The utility model also comprises a pressure control reset part 53, wherein the pressure control reset part 53 is arranged in the movable space 511 and is contacted with the inner wall of the movable space 511 and the pressure control movable part 52 to provide guiding and pushing acting force for the reset of the pressure control movable part 52; the pressure control reset part 53 is arranged, so that the pressure control movable part 52 can be reset under the guidance and the pushing of the pressure control reset part 53 after being restarted by oil liquid of the hydraulic oil pump 2; and thus the falling high-pressure oil fills the active space 511, the inlet 54 is already closed by the seal 523.

In the present embodiment, the pressure-controlled reset section 53 employs a compression spring 531; a return column 521 is disposed at an end of the pressure-controlled movable portion 52 away from the sealing column 522, one end of the compression spring 531 is fitted over the return column 521, and the other end of the compression spring 531 contacts with an inner wall of the movable space 511.

The movable space 511 is cylindrical, and the pressure-controlled movable part 52 is prismatic, so that a certain gap is formed between the pressure-controlled movable part 52 and the inner wall of the movable space 511, and oil can conveniently pass through the gap; in the present embodiment, the pressure-controlled movable portion 52 is in a hexagonal prism shape, but may be in other shapes as required, and the purpose of the pressure-controlled movable portion is to facilitate the oil to pass through.

In the present embodiment, the mounting portion 51 is detachable, the mounting portion 51 includes a valve seat 513 and a plug screw 514, and the valve seat 513 and the plug screw 514 are each detachably fitted in the pipeline of the hydraulic oil pump 2; the valve seat 513 and the plug screw 514 are both provided with inner spaces, and the inner spaces of the valve seat 513 and the plug screw 514 are matched to form a movable space 511; the inlet 54 and the outlet 55 are both arranged on the valve seat 513, wherein the inlet 54 is arranged at one end of the valve seat 513 far away from the screw plug 514, and the outlet 55 is arranged on the side surface of the valve seat 513; sealing rings 512 are arranged on the outer surfaces of the valve seat 513 and the plug screw 514; the outlet 55 is arranged between the valve seat 513 and the sealing ring 512 of the screw plug 514, and the sealing ring 512 of the valve seat 513 is arranged between the inlet 54 and the outlet 55; the mounting portion 51 is removable and includes a valve seat 513 and a plug 514 so that the seal 523 of the present invention can be replaced when aging occurs; it is also convenient right simultaneously detachable installation department 51 the utility model discloses dismantle and assemble.

In this embodiment, the sealing member 523 is made of rubber, which has high mechanical strength and good elasticity, and can be relieved by deformation under the action of external force; meanwhile, the composite material has good cold resistance, excellent air tightness, water resistance, electric insulation and heat insulation performance.

Example 2:

as shown in fig. 1-14, an electro-hydraulic lifter comprises a motor 1, an oil pump 2, a piston 3 and an oil cylinder 4; the cylinder 4 includes a reserve cylinder 41 and a hydraulic cylinder 42; the oil pump 2 is disposed in the reservoir cylinder 41; a hydraulic space 421 is provided in the hydraulic cylinder 42; the oil pump 2 comprises a pressurizing assembly 20 and a flow passage 21, wherein the pressurizing assembly 20 is arranged in the flow passage 21 and is connected with the motor 1; the flow passage 21 includes an upward inclined flow passage 22 and a downward inclined flow passage 23, the upward inclined flow passage 22 is communicated with the lower end of the hydraulic space 421, and the downward inclined flow passage 23 is communicated with the upper end of the hydraulic space 421; the pressurizing assembly 20 is positioned in the upward inclined flow passage 22 and the downward inclined flow passage 23 simultaneously; the piston 3 comprises a piston head 31 and a piston rod 32, and two ends of the piston rod 32 are respectively connected with the piston head 31 and the lifted piece; the piston head 31 is movable in the hydraulic space 421; in the present invention, high-pressure oil is respectively delivered to both ends of the hydraulic space 421 through the upward-falling runner 22 and the downward-falling runner 23 in the oil pump 2; the piston head 31 is pushed by the high-pressure oil to move in the hydraulic space 421; thereby driving the piston rod 32 and the warped piece connected with the piston rod 32 to move, so that the utility model can more rapidly complete the warping and folding work; meanwhile, the pressurizing components 20 of the oil pump 2 are simultaneously positioned in the upward inclined flow passage 22 and the downward inclined flow passage 23, so that the oil pressures of the oil pump and the oil pump are corresponding no matter the oil pump is driven to rise or is driven to fold; therefore, the complex piece that is raised by the utility model, no matter raise or draw in, can both go on more evenly stably.

In this embodiment, a common area exists between the upward inclined flow passage 22 and the downward inclined flow passage 23, and the pressurizing assembly is disposed in the common area; the upward inclined flow passage and the downward inclined flow passage respectively comprise an oil inlet passage, an oil outlet passage and a shared flow passage 25; the common flow channel 25 of the upward inclined flow channel and the downward inclined flow channel is superposed; an oil inlet passage 26 of the upward inclined flow passage 22 and an oil outlet passage 27 of the downward inclined flow passage 23 are communicated with one end of the common flow passage 25; an oil inlet channel 26 of the declination flow channel 23 and an oil outlet channel 27 of the declination flow channel 22 are communicated with the other end of the shared flow channel 25; the arrangement of the common flow passage 25 makes the whole structure of the utility model simpler, so that the ascending flow passage 22 and the descending flow passage 23 have a common region, and further the pressure efficiency of the oil liquid in the ascending flow passage 22 and the descending flow passage 23 is ensured to be consistent; the oil inlet channel 26 of the upward inclined flow passage 22 and the oil inlet channel 26 of the downward inclined flow passage 23 are both provided with a flow limiting assembly 28 only for oil inlet; the flow limiting assembly 28 is arranged to prevent the pressurized oil from mixing with the unpressurized oil and prevent the pressurized oil from flowing out of the oil pump 2 through the oil inlet passage 26; the oil outlet channels 27 of the upward inclined flow channel 22 and the downward inclined flow channel 23 are respectively provided with a pressure control valve 5; the pressure control valve 5 is a one-way valve only for discharging oil, a pressurizing area is formed between the pressure control valve 5 and the gear 208 group, and when the pressure of oil in the pressurizing areas of the upward inclined runner 22 and the downward inclined runner 23 is enough, the oil rushes through the pressure control valve 5 to enter the hydraulic space 421 to push the piston head 31 to move.

The compression assembly 20 employs a bi-directional set of gears 208; the gear 208 set comprises two gears 208 which are meshed with each other, and at least one gear 208 is connected with the motor 1; the two gears 208 are arranged so that the two gears can convey oil in the same direction when rotating again; the arrangement of the bidirectional gear 208 group enables the utility model to drive the gear 208 through the forward and reverse rotation of the motor 1, and to convey and pressurize the oil liquid with different flowing directions in the upward inclined runner 22 and the downward inclined runner 23; generally, the pressurizing assembly 20 only needs to adopt one group of gear 208 to carry out oil transportation and pressurization, and the number of the gear 208 groups can be increased according to the requirement of oil pressure and the requirement of the flow rate of oil in the flow passage 21; the fit clearance between the gears 208 is 1 to 1.2 threads; in the present embodiment, the number of the teeth of the gear 208 is 16, and the fit clearance between the gears 208 is 1.2 wires; compare in ordinary gear 208, the utility model provides a gear 208's the number of teeth is more and the fit clearance between each gear 208 is less, and then makes the transport and the pressurization to fluid more even and stable.

The pressure-controlled valve 5 includes a mounting portion 51, a pressure-controlled movable portion 52, and a pressure-controlled reset portion 53; the mounting part 51 is assembled at the oil outlet channel 27 of the inclined flow passage 22 and the declination flow passage 23, and the pressure control movable part 52 and the pressure control reset part 53 are assembled in the mounting part 51; an inlet 54 and an outlet 55 are arranged on the mounting part 51, and the pressure-controlled movable part 52 opens or closes the inlet 54 under the support of the pressure-controlled reset part 53; the pressure-controlled movable part 52 is provided with a sealing member 523 which corresponds to the inlet 54 and can seal the inlet 54; the sealing element 523 is made of soft material; in general, for the situation of gradual pressure relief in hydraulic equipment, a pressure control valve 5 is usually adopted to block the fallen high-pressure oil; the common valve body is a cone valve made of hard materials, and the oil pump 2 is also made of hard materials, so when the cone valve blocks the oil outlet of the oil outlet channel 27, the cone valve inevitably wears the oil pump 2, and the sealing effect is increasingly poor; in the present embodiment, the sealing effect is better by the sealing member 523 made of soft material.

A converging cavity 29 is arranged in the oil pump 2, and the converging cavity 29 is horizontally arranged; the oil outlet channels 27 of the upward flow channel 22 and the downward flow channel 23 are communicated with the confluence cavity 29, and an upward outlet 291 and a downward outlet 292 are arranged at two ends of the confluence cavity 29; an upper inclined pressure control valve 56 and a lower inclined pressure control valve 57 are respectively arranged at two ends of the confluence cavity 29 and used for controlling the opening and closing of an upper inclined outlet and a lower inclined outlet; a movable reciprocating valve 58 is arranged between the upper inclined pressure control valve 56 and the lower inclined pressure control valve 57; the reciprocating valve 58 is provided with a sealing ring 512 to prevent oil in different pressurized areas from mixing in the converging cavity 29; the intersection of the oil outlet channel 27 of the upper-inclination flow passage 22 and the confluence chamber 29, the upper-inclination outlet 291 and the upper-inclination pressure control valve 56 are arranged on the same side of the confluence valve; the intersection of the oil outlet channel 27 of the declined flow channel 23 and the confluence cavity 29, the declined outlet 292 and the declined pressure control valve 57 are arranged on the same side of the confluence valve; the converging cavities 29 are symmetrically arranged; the arrangement of the converging cavity 29 can be used for the pressurization and oil discharge of the upward inclined flow passage 22 and the pressurization and oil discharge of the downward inclined flow passage 23, so that the structure in the oil pump 2 is simpler and the production is more convenient; the converging cavities 29 are horizontally and symmetrically arranged, so that the lengths of the oil inlet channel 26 and the oil outlet channel 27 in the oil pump 2 are consistent no matter the oil pump is in a pressurizing area of the ascending runner 22 or the descending runner 23, and the oil pressures in the ascending runner 22 and the descending runner 23 are corresponding; and the setting of the reciprocating valve 58 makes more high-pressure oil liquid can be stored in the pressurized runner 21, so that the movement of the piston 3 can have enough high-pressure oil liquid to support the stable movement of the piston, the intermittent condition is avoided, and the warped piece can be more uniformly and stably carried out no matter warping or folding.

In the present embodiment, the mounting portion 51 of the pressure-controlled valve 5 is provided therein with a movable space 511, and the pressure-controlled movable portion 52 and the pressure-controlled reset portion 53 are provided in the movable space 511; an inlet 54 of the mounting portion 51 is provided at one end of the mounting portion 51 facing the shuttle valve 58, and an outlet 55 of the mounting portion 51 is provided at a side surface of the mounting portion 51; a sealing ring 512 is further arranged on the side surface of the mounting part 51, so that the inlet 54 of the mounting part 51 and the pressurizing area are in the same sealing area, and the outlet 55 of the mounting part 51 and the upward inclined outlet 291 or the downward inclined outlet 292 are in the same sealing area; the two ends of the pressure-controlled movable part 52 are respectively provided with a reset column 521 and a sealing column 522; the sealing column 522 is arranged at one end of the pressure-controlled movable part 52 facing the inlet 54 of the mounting part 51, and a sealing member 523 is arranged on the sealing column 522; the reset column 521 is arranged at the other end of the pressure-controlled movable part 52, the pressure-controlled reset part 53 adopts a compression spring 531, and two ends of the compression spring 531 are respectively connected with the pressure-controlled movable part 52 and one end of the movable space 511 away from the inlet 54; the arrangement of the movable space 511 and the pressure-controlled reset part 53 plays a guiding role in resetting the pressure-controlled movable part 52, so that the sealing member 523 can stably seal the inlet 54 of the mounting part 51; when the pressure-controlled movable portion 52 is pushed open by the high-pressure oil in the pressurized region, the high-pressure oil enters the movable space 511 from the inlet 54 of the mounting portion 51, leaves the movable space 511 from the outlet 55 of the mounting portion 51, further leaves the manifold chamber 29 through the upward inclined outlet 291 or the downward inclined outlet 292, enters the hydraulic space 421, and applies a pushing force to the piston 3; when the lifted piece is lifted to a certain angle and needs to be limited, the motor 1 and the gear 208 set stop working, so that no new high-pressure oil liquid enters the hydraulic space 421 in the upward flow channel 22, the high-pressure oil liquid existing in the hydraulic space 421 flows back under the influence of the lifted piece, the piston 3 and other factors, and the returned high-pressure oil liquid returns to the confluence chamber 29 through the upward inclined outlet 291 or the downward inclined outlet 292 and then returns to the movable space 511 through the outlet 55 of the mounting part 51; when the motor 1 and the gear 208 set stop working, the oil pressure of the oil in the pressurization area is not enough to push the pressure-controlled movable part 52 open, and the pressure-controlled movable part 52 is reset under the guidance of the movable space 511 and the pressure-controlled reset part 53; when the flowing back high-pressure oil fills the movable space 511, the pressure-controlled movable part 52 is pushed to move towards the inlet 54 of the mounting part 51, and the sealing member 523 seals the inlet 54 of the mounting part 51; and the larger the returned oil pressure is, the better the sealing effect of the seal 523 is.

In this embodiment, the movable space 511 is cylindrical, and the pressure-controlled movable portion 52 is hexagonal prism-shaped, so that the high-pressure oil can flow to the outlet 55 of the mounting portion 51 after ejecting the pressure-controlled movable portion 52.

In the present embodiment, the oil pump 2 includes an oil pump base 201, an oil pump lower cover 202, and an oil pump upper cover 203, the oil pump lower cover 202 is disposed between the oil pump base 201 and the oil pump upper cover 203, and the three are assembled by bolts; the upper surface of the oil pump seat 201 is provided with two communicated lower assembling spaces 204, the two lower assembling spaces 204 are positioned on the same straight line, and both the two lower assembling spaces are arranged on the symmetrical line of the oil pump seat 201; the oil inlet passage 26 of the upward inclined flow passage 22 and the oil outlet passage 27 of the downward inclined flow passage 23 are disposed at one side of the lower assembling space 204, and the oil inlet passage 26 of the downward inclined flow passage 23 and the oil outlet passage 27 of the upward inclined flow passage 22 are disposed at the other side of the lower assembling space 204; the oil inlet channel 26 of the upward inclined flow passage 22 and the oil outlet channel 27 of the downward inclined flow passage 23 are mutually symmetrical with the oil inlet channel 26 of the downward inclined flow passage 23 and the oil outlet channel 27 of the upward inclined flow passage 22, so that the lengths of the oil inlet channel 26 and the oil outlet channel 27 are the same in the oil pump 2 no matter the pressurizing area of the upward inclined flow passage 22 or the downward inclined flow passage 23, and further the oil pressures in the upward inclined flow passage 22 and the downward inclined flow passage 23 are corresponding; two upper assembling spaces 205 are arranged on the oil pump lower cover 202, the upper assembling spaces 205 correspond to the lower assembling spaces 204, the upper assembling spaces 205 and the lower assembling spaces 204 are matched to form gear assembling spaces 206, and the gears 208 are arranged in the gear assembling spaces 206; the common flow channel 25 is arranged on the oil pump lower cover 202, the gear assembling spaces 206 are communicated with the common flow channel 25, and the common flow channel 25 is arranged between the two gear assembling spaces 206, so that when the gear 208 rotates, oil is driven to flow and pressurize; the oil pump upper cover 203 closes the gear fitting space 206, the common flow passage 25, the ascending flow passage 22, and the descending flow passage 23.

In the present embodiment, the oil inlet passage 26 includes an oil inlet region 261 and a flow restriction region 262, the flow restriction region 262 is disposed between the oil inlet region 261 and the common flow passage 25, and the flow restriction assembly 28 is disposed in the flow restriction region 262; the inner diameter of the oil inlet area 261 is smaller than that of the flow limiting area 262, and the flow limiting component 28 adopts steel balls 281; when the steel balls 281 are acted by high-pressure oil, the oil inlet channel 26 of the upward inclined flow passage 22 and the oil inlet channel 26 of the downward inclined flow passage 23 are closed under the pushing of the high-pressure oil, and the pressurized oil is prevented from being mixed with the unpressurized oil.

In some other ways, the flow-limiting assembly 28 may be replaced with a one-way valve, so that the overall accuracy of the present invention is higher.

In this embodiment, the oil pump 2 further includes a filter 207, and the filter 207 is disposed outside the oil inlet passage 26, so as to filter impurities in the oil.

In the present embodiment, the lower fitting space 204 communicates with the oil storage space inside the reserve tube 41; when oil passes through the gear 208 group, the oil flows into the lower assembly space 204 along the gear 208, and when the oil in the lower assembly space 204 is more, the oil overflows, so that the flowing and the pressure of the oil in the upward flow passage 22 and the downward flow passage 23 are influenced; the lower fitting space 204 is communicated with the oil storage space inside the oil storage cylinder 41, so that the oil in the lower fitting space 204 returns to the oil storage space inside the oil storage cylinder 41, and the situation that the oil in the lower fitting space 204 overflows into the upward inclined flow passage 22 and the downward inclined flow passage 23 is avoided.

The hydraulic cylinder 42 comprises a cylinder body 422 and an end cover 423, the hydraulic space 421 is arranged in the cylinder body 422, one end of the cylinder body 422 is provided with an opening, and the end cover 423 is arranged at the opening; the end cover 423 is provided with a through hole, the piston rod 32 moves along the through hole, and a sealing element 523 is arranged at the through hole; in this embodiment, two sealing members 523 are disposed along the through hole to ensure the sealing performance of the hydraulic cylinder 42.

An upward inclined channel 424 and a downward inclined channel 425 are arranged on the cylinder 422; the tilt-up passage 424 is communicated with the tilt-up outlet 291 and with the lower end of the hydraulic space 421; the declination channel 425 is communicated with the declination outlet 292 and is communicated with the upper end of the hydraulic space 421; a pressure relief channel 426 is further arranged on the cylinder body 422, and the pressure relief channel 426 is communicated with the middle part of the hydraulic space 421 and the oil storage cylinder 41; the arrangement of the pressure relief channel 426 can further limit the moving range of the piston 3, and prevent the piston from exceeding a specified height; the situation that the tilting angle is too large when the piston 3 drives the tilted piece is avoided.

The piston head 31 includes a positioning piston 311 and an impact piston 312; the positioning piston 311 is matched with the hydraulic space 421 and moves along with the hydraulic space 421; the impact piston 312 is connected with the piston rod 32, an impact reflux valve 313 and an impact overflow valve 314 are arranged on the impact piston 312, the impact reflux valve 313 and the impact overflow valve 314 are one-way valves, wherein the impact reflux valve 313 moves towards one end of the end cover 423 to be opened, and the impact overflow valve 314 moves towards one end of the positioning piston 311 to be opened; the impact return valve 313 and the impact overflow valve 314 arranged on the impact piston 312 enable high-pressure oil to flow between the hydraulic space 421 and the positioning piston 311 and the impact piston 312 through the impact return valve and the impact overflow valve, and further a buffer function of the piston head 31 is achieved; after the high-pressure oil in the downward inclined channel 425 enters the hydraulic space 421, the impact overflow valve 314 is opened by the pressure of the high-pressure oil, the high-pressure oil enters the space between the positioning piston 311 and the impact piston 312, the falling of the piston 3 is buffered by the high-pressure oil entering the space between the positioning piston 311 and the impact piston 312, the oil between the positioning piston 311 and the impact piston 312 is continuously pressurized when the piston 3 continuously falls, and the impact return valve 313 is opened to return to the hydraulic space 421 when the oil between the positioning piston 311 and the impact piston 312 reaches a certain pressure; and further avoid when the drive draws in fluid promotion piston 3, piston 3 resets too fast and leads to by the piece that rises and fall impaired fast.

In the embodiment, the hydraulic cylinder further comprises a confluence seat 6, wherein the confluence seat 6 is connected with the oil storage cylinder 41 and the hydraulic cylinder 42; an engaging channel 61 is arranged in the collecting base 6, the engaging channel 61 comprises a declination engaging channel 62 and an upward inclination engaging channel 63, the upward inclination engaging channel 63 is communicated with the upward inclination channel 424 and the upward inclination outlet 291, and the declination engaging channel 62 is communicated with the declination channel 425 and the declination outlet 292; the provision of the manifold block 6 makes the connection between the reserve cylinder 41 and the hydraulic cylinder 42 more stable, and also makes the high-pressure oil in the ascending flow passage 22 and the descending flow passage 23 accurately flow into both ends of the hydraulic space 421 in cooperation with the engaging passage 61.

In the present embodiment, the confluence block 6 includes a manual drain passage 64, and a manual drain valve 65 is provided in the manual drain passage 64; the drainage channel is communicated with a downward inclination joining channel 62 and an upward inclination joining channel 63; the manual drain passage 64 and the manual drain valve 65 are arranged, so that when the utility model fails and cannot be tilted and folded, high-pressure oil in the hydraulic space 421 can be discharged through the manual drain passage 64 and the manual drain valve 65, and the manual folding of the tilted part is realized; be provided with oiling mouth 411 on oil storage cylinder 41 to be provided with oil cover 412 on oiling mouth 411, make the utility model discloses accessible oiling mouth 411 annotates the oil.

In this embodiment, an overflow channel 66 is further disposed in the manifold base 6, and the overflow channel 66 is communicated with the tilt-up engaging channel 63, the reserve cylinder 41, and the pressure relief channel 426; a pressure relief overflow valve 7 is arranged in the overflow channel 66, the pressure relief overflow valve 7 is a one-way valve and is arranged at the junction of the overflow channel 66 and the upward-inclined connecting channel 63, the pressure relief overflow valve 7 comprises a pressure relief movable part 71 and a pressure relief resetting part 72, and the pressure relief movable part 71 is supported by the pressure relief resetting part 72 to close or open the overflow channel; the pressure-controlled movable part 52 is provided with a sealing member 523 which corresponds to the overflow channel 66 and can seal the overflow channel 66; the sealing element 523 is made of soft material; the direction of the oil flowing out of the pressure relief channel 426 is limited through the arrangement of the overflow channel 66 and the pressure relief overflow valve 7; the oil pressure of the oil flowing out of the pressure relief channel 426 is low, and when the oil pressure is not enough to jack the pressure relief overflow valve 7, the oil directly flows back to the oil storage cylinder 41; when the oil pressure of the oil flowing out of the pressure relief channel 426 is high enough to push open the pressure relief overflow valve 7, the oil flows back to the inclined connecting channel 63, so as to support the piston 3 again and prevent it from falling rapidly.

In the present embodiment, the pressure relief spill valve 7 includes a fitting portion 73, and an outer side surface of the fitting portion 73 is provided with a seal ring 735, and the spill passage 66 is closed by the seal ring 735; a movable pressure-relief space 731 is provided in the fitting part 73, a pressure-relief inlet 732 is provided at an end of the movable pressure-relief space 731 adjacent to the cylinder 422, a general pressure-relief outlet 733 communicating with the oil reservoir 41 is provided at a side of the fitting part 73, and a high-pressure-relief outlet 734 is provided at an end of the movable pressure-relief space 731 away from the cylinder 422; the pressure relief movable portion 71 includes a first movable block 711, a second movable block 712, and a linking block 713, the linking block 713 is connected to the first movable block 711 and the second movable block 712, the first movable block 711 is disposed in and moves along the movable pressure relief space 731, the linking block 713 is disposed in and moves along the high-pressure relief outlet 734, and the second movable block 712 is disposed in the overflow passage 66 at an end near the upwardly inclined outlet 291; the pressure relief reset part 72 adopts a compression spring 531, and two ends of the compression spring 531 are connected with one end of the overflow channel 66 close to the upward inclined joining channel 63 and the second movable block 712; the sealing member 523 is disposed on the engagement block 713, and closes or opens the high-pressure relief outlet 734 with the movement of the first movable block 711 and the second movable block 712; when the oil pressure of the oil flowing out of the pressure relief channel 426 is low, the oil enters the movable pressure relief space 731 from the pressure relief inlet 732, directly flows through the first movable block 711, and leaves the movable pressure relief space 731 from the common pressure relief outlet 733 to enter the oil storage cylinder 41; when the oil pressure of the oil flowing out of the pressure relief channel 426 is high, the first movable block 711 is pushed to integrally move the pressure relief movable part 71 and drive the sealing member 523 to leave the high-pressure relief outlet 734, so that the oil flows into the upward inclined engaging channel 63; when the oil pressure of the subsequent oil is insufficient, the entire relief movable portion 71 is reset by the relief reset portion 72, and the seal 523 closes the high-pressure relief outlet 734.

In this embodiment, a pressure relief flow passage 24 is further provided in the oil pump 2, the pressure relief flow passage 24 is communicated with the upward inclined flow passage 22 and the downward inclined flow passage 23, and a plug 8 is provided in the pressure relief flow passage 24; a pressure relief through hole 67 is further formed in the confluence seat 6, the pressure relief through hole 67 is communicated with the downward inclination joining channel 62 and the upward inclination joining channel 63, and a plug 8 is arranged in the pressure relief through hole 67; the pressure relief flow channel 24, the pressure relief through hole 67 and the plug 8 are matched to facilitate manual pressure relief.

The preferable using environment of the utility model is the ship body, which is used for adjusting the upwarping of the outboard engine; one end of the pressure relief channel 426, which is communicated with the hydraulic space 421, is arranged at a position from the bottom of the cylinder body to 1/3 of the top of the cylinder body; in the utility model, the upwarp force is maximum before the piston is positioned at 1/3 position of the hydraulic space; when the piston exceeds the left position and the right position of the hydraulic space by 1/3, the take-off force and the outboard engine thrust reach a dynamic balance relationship, and when the outboard engine thrust is large, when the piston reaches the left position and the right position of the hydraulic space by 1/3, the pressure in the pressure relief channel 426 is increased, so that the pressure relief overflow valve 7 in the overflow channel 66 is opened, and the input pressure of the upward inclined channel is reduced; the oil liquid output by the oil pump 2 and used for ascending is directly decompressed and flows back to the oil storage tank through a common decompression outlet 733, and the piston drives the outboard engine to descend to the position about 1/3 of the hydraulic space;

when the piston is lower than the position of about 1/3 of the hydraulic space, the pressure relief channel 426 is closed, the oil pump 2 outputs the maximum pressure, and the piston is pushed to drive the outboard engine to ascend; therefore, when the piston moves up and down at the position of 1/3 of the hydraulic space, the take-off angle of the outboard engine is driven to change, so that the yacht is safer;

when the outboard engine stops working, the thrust of the outboard engine is reduced, the pressure of the outboard engine acting on the piston is reduced, the oil pump 2 drives the oil to be output to the upper inclined channel, and the oil pressure of the oil in the hydraulic space is in the lifting process; therefore, when the piston is positioned at about 1/3 of the hydraulic space in the process, the pressure in the overflow channel 66 cannot open the pressure relief overflow valve 7, and the oil cylinder pushes the outboard engine to be lifted to the maximum position and separated from the water surface, so that the outboard engine is effectively protected from being corroded by river seawater and the like.

Of course, the utility model is also applicable to a series of environments such as material handling, equipment lifting closure, equipment positioning and the like.

It should be noted that other technical schemes of the electro-hydraulic tilting device belong to the prior art, and are not described in detail.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. An oil pump pressure control assembly is arranged in a hydraulic oil pump and is characterized in that a converging cavity, an upward inclined flow passage and a downward inclined flow passage are arranged in the hydraulic oil pump; the upward inclined flow channel and the downward inclined flow channel are communicated with the confluence cavity; an upper inclined outlet and a lower inclined outlet are arranged at two ends of the converging cavity, an upper inclined pressure control valve is arranged at the upper inclined outlet, and a lower inclined pressure control valve is arranged at the lower inclined outlet; a movable reciprocating valve is arranged between the upper tilting pressure control valve and the lower tilting pressure control valve; the oil outlet channel of the upward inclined flow channel is arranged between the upward inclined pressure control valve and the reciprocating valve, and the oil outlet channel of the downward inclined flow channel is arranged between the downward inclined pressure control valve and the reciprocating valve.

2. The oil pump pressure control assembly according to claim 1, wherein the manifold chamber is horizontally disposed; the confluence cavity, the upper inclined outlet, the lower inclined outlet, the upper inclined pressure control valve and the lower inclined pressure control valve are symmetrically arranged.

3. The oil pump pressure control assembly according to claim 2, wherein each of the upper and lower tilt pressure control valves includes a mounting portion and a pressure control movable portion; a movable space is arranged in the mounting part, and an inlet and an outlet are arranged in the movable space; the pressure-controlled movable part is movably arranged in the movable space, and a soft sealing piece is arranged on the pressure-controlled movable part and closes or opens the inlet along with the movement of the pressure-controlled movable part.

4. The oil pump pressure control assembly according to claim 3, wherein the outer surfaces of the upper and lower tilting pressure control valves are provided with sealing rings, and the sealing rings are positioned between the inlet and the outlet; the inlet is arranged on one side facing the oil outlet channel, and the outlet corresponds to the upward inclined outlet and the downward inclined outlet.

5. The oil pump pressure control assembly according to claim 4, wherein a sealing column is arranged at one end of the pressure control movable part close to the inlet, and the inlet is positioned on a movable path of the sealing column; the seal is fitted over the seal post.

6. The oil pump pressure control assembly according to claim 5, wherein said sealing post includes a first region and a second region, wherein the diameter of the first region is smaller than the diameter of the second region; the sealing element is provided with an assembling through hole, and the inner diameter of the assembling through hole corresponds to the diameter of the first area; and one end of the sealing element close to the inlet is provided with an assembly groove, the inner diameter of the assembly groove corresponds to the diameter of the second area, and the second area is matched with the assembly groove.

7. The oil pump pressure-controlled assembly according to claim 6, further comprising a pressure-controlled reset portion, wherein the pressure-controlled reset portion is disposed in the movable space, and contacts with an inner wall of the movable space and the pressure-controlled movable portion to provide guiding and pushing force for resetting of the pressure-controlled movable portion.

8. The oil pump pressure control assembly according to claim 7, wherein the pressure control reset part adopts a compression spring; one end of the pressure-controlled movable part, which is far away from the sealing column, is provided with a reset column, one end of a compression spring is sleeved on the reset column, and the other end of the compression spring is contacted with the inner wall of the movable space.

9. The oil pump pressure control assembly according to claim 8, wherein the movable space is cylindrical, and the pressure control movable portion is prismatic; the sealing element is made of rubber.

10. The oil pump pressure control assembly according to claim 9, wherein the mounting portion is detachable, the mounting portion includes a valve seat and a plug screw, and the valve seat and the plug screw are respectively detachably fitted in a pipeline of the hydraulic oil pump; the valve seat and the screw plug are both provided with internal spaces, and the internal spaces of the valve seat and the screw plug are matched to form a movable space; the inlet and the outlet are arranged on the valve seat, wherein the inlet is arranged at one end of the valve seat far away from the screw plug, and the outlet is arranged on the side surface of the valve seat; sealing rings are arranged on the outer surfaces of the valve seat and the plug screw; the outlet is arranged between the valve seat and the sealing ring of the screw plug, and the sealing ring of the valve seat is arranged between the inlet and the outlet.

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