CN111706571A

CN111706571A - Oil cylinder piston with high strength and good sealing performance for trailer pump air extraction unit

Info

Publication number: CN111706571A
Application number: CN202010593670.4A
Authority: CN
Inventors: 孙钟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-27
Filing date: 2020-06-27
Publication date: 2020-09-25

Abstract

The invention relates to the technical field of oil cylinder pistons, in particular to an oil cylinder piston with high strength and good sealing performance for a trailer pump air extraction unit. According to the invention, the first sealing rings are arranged, and the plurality of groups of first sealing rings are arranged on the pressurizing blocks, so that the sealing performance between the pressurizing blocks is effectively improved, and the situation that when the movable rod repeatedly runs back and forth, oil in the shell can leak out from a gap in the interior of the pressurizing block, so that the pressure in the shell is insufficient when the movable rod runs, the running efficiency of the device is reduced, or the device cannot be used is avoided.

Description

Oil cylinder piston with high strength and good sealing performance for trailer pump air extraction unit

Technical Field

The invention relates to the technical field of oil cylinder pistons, in particular to an oil cylinder piston with high strength and good sealing performance for a towing pump air extraction unit.

Background

The piston of the oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion or swinging motion, and the piston type hydraulic actuating element is simple in structure and reliable in work. When it is used to implement reciprocating motion, it can remove speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in hydraulic systems of various machines, and the piston of oil cylinder can be used as actuating element in the course of operation of air-pumping unit of drag pump.

The leakproofness of current a lot of hydro-cylinder pistons is not good, can lead to hydraulic oil to leak to lead to the hydro-cylinder piston to the consumption of hydraulic oil to increase, still can influence the work efficiency of hydro-cylinder piston simultaneously, consequently need design a drag pump air exhaust unit and solve above-mentioned problem with having the hydro-cylinder piston that high strength sealing performance is good.

Disclosure of Invention

The invention aims to provide an oil cylinder piston with high strength and good sealing performance for a towing pump air extraction unit, and aims to solve the problems that hydraulic oil leaks due to poor sealing performance of a plurality of existing oil cylinder pistons in the background art, so that the consumption of the hydraulic oil by the oil cylinder pistons is increased, and the working efficiency of the oil cylinder pistons is influenced.

In order to achieve the purpose, the invention provides the following technical scheme: the oil cylinder piston comprises a shell, wherein two ends of the shell are both connected with oil inlets, one ends of the oil inlets extend into the shell, the other ends of the oil inlets are all sleeved with clamping mechanisms, two ends of the shell are both connected with discharge mechanisms, one ends of the discharge mechanisms extend into the shell, one side of the shell is connected with a sealing block, two sides of the sealing block are both provided with fixing screws in a threaded manner, the other ends of the fixing screws penetrate through the sealing block and extend into the shell, one side of the sealing block is provided with a movable rod in a penetrating manner, one end of the movable rod extends into the shell, one end, close to the movable rod, of the inside of the sealing block is provided with a second sealing ring, the number of the second sealing rings is two, and an anti-friction ring is arranged inside the sealing block on one side, away from each other, of the second sealing rings, and antifriction circle and second sealing washer laminate each other, the surface that the movable rod extends to the casing inside cup joints and installs with the briquetting, and the quantity of the piece that just pressurizes is two, the surface that adds the briquetting all installs the packing ring, the other end of packing ring all cup joints and installs first sealing washer, it all cup joints and installs the strengthening rib, two to add the movable rod surface that the briquetting is close to one side each other the surface that the strengthening rib is close to one side each other cup joints and installs the concatenation ring, the sealing block is close to one side that adds the briquetting and installs buffer gear, and buffer gear's quantity is two.

Preferably, buffer gear is including holding the piece, hold one side that the piece is close to first sealing washer and install the telescopic link, and the quantity of telescopic link is two, buffer spring is installed to holding piece one side between the telescopic link, the buffer block is installed to the telescopic link with buffer spring's the other end, the piece is placed to one side of holding the piece is installed, the inside one side of placing the piece of being close to of casing is seted up the standing groove, and places the piece and extend to in the standing groove.

Preferably, fixture includes the seal box, the clamping screw is installed all the spiral in the both sides of seal box, and inside the clamping screw runs through and extends to the seal box, the grip block is all installed to the inside clamping screw one side that is close to each other of seal box.

Preferably, discharge mechanism includes out oil pipe, the inside of going out oil pipe is all installed and is placed the platform, place the inside one side of platform and install first movable block, the one end movable mounting of first movable block has the closing plate, the one end fixed mounting of closing plate has the second movable block, the carriage release lever is installed to the bottom of second movable block, the one end of carriage release lever extends to the inside of going out oil pipe, the internal thread of going out oil pipe one side installs rotatory screw rod, and the carriage release lever cup joints and installs on rotatory screw rod.

Preferably, the outer surface of the rotating screw at the bottom end of the moving rod is sleeved with a second bevel gear, one side of the second bevel gear is engaged with a first bevel gear, one side of the oil outlet pipe is connected with a rotating handle, and one end of the rotating handle extends to the inside of the oil outlet pipe and is connected with the first bevel gear.

Preferably, the inside one side that is close to the carriage release lever of oil pipe is installed the installation pole, the inside of installation pole is cup jointed and is installed the connecting rod, and the other end of connecting rod is connected with the carriage release lever, the connecting rod is located the inside both sides of installation pole and has all seted up the spout, the inside all slidable mounting of spout has the slider, and the one end of slider is connected with the connecting rod.

Preferably, the pivot is installed in the run-through of concatenation ring one side, the supplementary piece is installed to one side that the pivot was kept away from to the concatenation ring, the one end of supplementary piece is installed and is run through the area, the installation piece is installed to the one end that the concatenation ring surface is close to supplementary piece, and runs through the area and run through the installation piece.

Preferably, one side screw thread that the concatenation ring was kept away from to the installation piece is installed and is rotated the screw rod, and rotates the inside that the screw rod extends to the installation piece, the turning block is installed to the rotation screw rod one end in the installation piece outside, it installs running gear to rotate the screw rod and extend to the inside one end of installation piece, run through the bottom in area and seted up the mounting groove, and inside running gear extended to the mounting groove, the tooth is evenly installed to the one end of mounting groove, and tooth and running gear intermeshing.

Compared with the prior art, the invention has the beneficial effects that: the oil cylinder piston with high strength and good sealing performance for the trailer pump air extraction unit is simple in structure and convenient to install, and the device can effectively prevent the movable rod from being broken in the operation process, so that the movable rod is prevented from being broken to cause the device to be used normally, and the large device connected with the device is caused to be operated normally.

1. Through being provided with first sealing washer, install the first sealing washer of multiunit on the briquetting to make the leakproofness between the briquetting promote effectively, prevent to make a round trip when the operation that relapse at the movable rod with this, the inside fluid of casing can be followed the gap department of pressurization block and revealed, thereby lead to the movable rod when carrying out the operation the inside pressure of casing not enough, make the operating efficiency of device reduce, or the condition that the device can't use appears.

2. Through being provided with discharge mechanism, the rotatory handle of staff's accessible to make the closing plate that is used for sealed oil pipe open, thereby make the inside fluid of casing thereby oil pipe department is discharged, thereby prevent at staff dismounting device, because staff's misoperation, thereby lead to bumping between movable rod and the casing, lead to appearing the spark, thereby make the inside surplus fluid of casing can take place the burning, thereby endanger the emergence of staff's life safety condition.

3. Through being provided with buffer gear, buffer spring who installs on buffer gear will cushion the protection to the buffer block that contacts with the pressurization piece, thereby prevent to make a round trip when the removal that repeats at the pressurization piece, the pressurization piece can take place the collision condition many times with sealed piece, thereby lead to appearing wearing and tearing and crack on the pressurization piece, make the oil of casing opposite side can follow the crack on the first sealing washer and leak out, thereby lead to when the device operates, the pressure of pressurization piece both sides is not enough, thereby it takes place to influence the condition of device normal operating.

Drawings

FIG. 1 is a schematic sectional elevation view of the structure of the present invention;

FIG. 2 is a schematic sectional view of a front view of a buffering mechanism according to the present invention;

FIG. 3 is a schematic top sectional view of a clamping mechanism according to the present invention;

FIG. 4 is a schematic sectional front view of the discharge mechanism of the present invention;

FIG. 5 is a schematic side view in cross section of a splice ring configuration of the present invention;

FIG. 6 is a schematic side sectional view of a structural mounting block of the present invention;

FIG. 7 is an enlarged view of a portion of the structure of FIG. 4A in accordance with the present invention;

FIG. 8 is an enlarged view of a portion of the structure of FIG. 4B in accordance with the present invention;

fig. 9 is a partially enlarged view of the structure at C in fig. 5 according to the present invention.

In the figure: 1. a housing; 110. a gasket; 111. pressing a block; 112. a first seal ring; 2. a movable rod; 3. a buffer mechanism; 310. accommodating the block; 311. placing the blocks; 312. a placement groove; 313. a buffer block; 314. a telescopic rod; 315. a buffer spring; 4. a clamping mechanism; 410. a sealing box; 411. a clamping block; 412. clamping the screw rod; 5. an oil inlet; 6. a discharge mechanism; 610. an oil outlet pipe; 611. a placing table; 612. a sealing plate; 613. a travel bar; 614. rotating the screw; 615. rotating the grip; 616. a first bevel gear; 617. a second bevel gear; 6181. mounting a rod; 6182. a chute; 6183. a slider; 6184. a connecting rod; 6191. a first movable block; 6192. a second movable block; 710. a sealing block; 711. a second seal ring; 712. an anti-friction ring; 8. fixing screws; 910. reinforcing ribs; 911. a splicing ring; 9121. mounting blocks; 9122. a through strap; 9123. mounting grooves; 9124. a rodent; 9125. a rotating gear; 9126. rotating the block; 9127. rotating the screw; 913. a rotating shaft; 914. and an auxiliary block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, an embodiment of the present invention is shown:

an oil cylinder piston with high strength and good sealing performance for a towing pump air extraction unit comprises a shell 1, wherein two ends of the shell 1 are both connected with an oil inlet 5, one end of the oil inlet 5 extends into the shell 1, the other end of the oil inlet 5 is sleeved with a clamping mechanism 4, two ends of the shell 1 are both connected with a discharge mechanism 6, one end of the discharge mechanism 6 extends into the shell 1, one side of the shell 1 is connected with a sealing block 710, two sides of the sealing block 710 are both provided with a fixing screw 8 in a threaded manner, the other end of the fixing screw 8 penetrates through the sealing block 710 and extends into the shell 1, one side of the sealing block 710 is provided with a movable rod 2 in a penetrating manner, one end of the movable rod 2 extends into the shell 1, one end, close to the movable rod 2, of the inside of the sealing block 710 is provided with a second sealing ring 711, the number of the second sealing rings 711 is two, and an anti-friction ring 712 is arranged inside the sealing block 710, the anti-friction ring 712 and the second seal ring 711 are attached to each other, the outer surface of the movable rod 2 extending into the housing 1 is sleeved with the pressurizing block 111, the number of the pressurizing blocks 111 is two, the outer surface of the pressurizing block 111 is provided with the gasket 110, the other end of the gasket 110 is sleeved with the first seal ring 112, the outer surface of the movable rod 2 on the side of the pressurizing block 111 close to each other is sleeved with the reinforcing rib 910, the outer surface of the side of the two reinforcing ribs 910 close to each other is sleeved with the splicing ring 911, the side of the seal block 710 close to the pressurizing block 111 is provided with the buffer mechanism 3, the number of the buffer mechanisms 3 is two, a worker installs a plurality of sets of first seal rings 112 on the pressurizing block 111, and each set of first seal rings 112 is attached to the inner wall of the housing 1, so that the sealing performance between the pressurizing blocks 111 is effectively improved, thereby preventing the movable rod 2 from repeatedly operating back, the oil inside the housing 1 leaks out from the gap inside the pressurizing block 111, so that the pressure inside the housing 1 is insufficient when the movable rod 2 operates, and the operation efficiency of the device is reduced or the device cannot be used.

Further, the buffer mechanism 3 includes two accommodating blocks 310, one side of the accommodating block 310 close to the first seal ring 112 is provided with two telescopic rods 314, one side of the accommodating block 310 between the telescopic rods 314 is provided with a buffer spring 315, the other ends of the telescopic rods 314 and the buffer spring 315 are provided with a buffer block 313, one side of the accommodating block 310 is provided with a placing block 311, one side of the inside of the housing 1 close to the placing block 311 is provided with a placing groove 312, the placing block 311 extends into the placing groove 312, the buffer spring 315 arranged on the buffer mechanism 3 can buffer and protect the buffer block 313 in contact with the pressurizing block 111, so as to prevent the pressurizing block 111 from colliding with the seal block 710 for a plurality of times when the pressurizing block 111 moves back and forth repeatedly, thereby causing abrasion and cracks on the pressurizing block 111, and leaking oil on the other side of the housing 1 from cracks on the first seal ring 112, therefore, when the apparatus is operated, the pressure on both sides of the pressurizing block 111 is insufficient, which may affect the normal operation of the apparatus.

Further, the clamping mechanism 4 includes a sealing box 410, clamping screws 412 are spirally installed on both sides of the sealing box 410, and the clamping screws 412 extend into the sealing box 410, clamping blocks 411 are installed on the mutually adjacent sides of the clamping screws 412 in the sealing box 410, and a worker can clamp the clamping blocks 411 towards the middle by rotating the clamping screws 412, so as to protect the joint of the oil inlet 5 and the oil delivery port, thereby preventing the abrasion between the oil inlet 5 and the oil delivery port from being increased by the vibration generated on the housing 1 when the device operates, resulting in the occurrence of the oil leakage at the joint of the oil inlet 5 and the oil delivery port due to the oil liquid inside the housing 1, thereby reducing the oil pressure inside the housing 1, and affecting the normal operation of the device, and the shaking of the joint of the oil inlet 5 and the oil delivery port can be effectively reduced by the clamping blocks 411 performing stable clamping at the joint, thereby reducing wear and tear and thereby preventing oil leakage from the device.

Further, the discharging mechanism 6 includes an oil outlet pipe 610, a placing table 611 is installed inside the oil outlet pipe 610, a first movable block 6191 is installed on one side inside the placing table 611, a sealing plate 612 is movably installed at one end of the first movable block 6191, a second movable block 6192 is fixedly installed at one end of the sealing plate 612, a moving rod 613 is installed at the bottom end of the second movable block 6192, one end of the moving rod 613 extends into the oil outlet pipe 610, a rotating screw 614 is installed on the inner thread on one side of the oil outlet pipe 610, the moving rod 613 is installed on the rotating screw 614 in a sleeved mode, a second bevel gear 617 is installed on the outer surface of the rotating screw 614 at the bottom end of the moving rod 613 in a sleeved mode, a first bevel gear 616 is installed on one side of the second bevel gear 617 in a meshed mode, a rotating handle 615 is connected to one side of the oil outlet pipe 610, one end of the rotating handle 615 extends, a mounting rod 6181 is arranged at one side of the inside of the oil outlet pipe 610 close to the movable rod 613, a connecting rod 6184 is sleeved inside the mounting rod 6181, the other end of the connecting rod 6184 is connected with the moving rod 613, sliding grooves 6182 are respectively arranged on the two sides of the connecting rod 6184 positioned in the mounting rod 6181, sliding blocks 6183 are respectively arranged in the sliding grooves 6182 in a sliding manner, one end of the sliding block 6183 is connected with the connecting rod 6184, a worker rotates the handle 615, thereby allowing the sealing plate 612 for sealing the oil outlet pipe 610 to be opened, so that the oil inside the casing 1 is discharged at the oil outlet pipe 610, thereby preventing the worker from disassembling the device, due to the operator's misoperation, the movable rod 2 collides with the housing 1, resulting in sparks, so that the residual oil inside the shell 1 can be burnt, and the life safety of workers can be endangered.

Further, a rotating shaft 913 is installed on one side of the splicing ring 911 in a penetrating manner, an auxiliary block 914 is installed on one side, far away from the rotating shaft 913, of the splicing ring 911, a penetrating belt 9122 is installed at one end of the auxiliary block 911, the outer surface of the splicing ring 911 is installed at one end, close to the auxiliary block 914, of the splicing ring 9121, a rotating screw 9127 is installed on one side, far away from the splicing ring 911, of the mounting block 9121 in a threaded manner, the rotating screw 9127 extends into the mounting block 9121, a rotating block 9126 is installed at one end of the rotating screw 9127 on the outer side of the mounting block 9121, a rotating gear 9125 is installed at one end, extending into the mounting block 9121, a mounting groove 9123 is formed in the bottom end, penetrating through the belt 9122, the rotating gear 9125 extends into the mounting groove 9123, a rodent 9124 is evenly installed at one end of the mounting groove 9123, the rodent 9124 is meshed with the rotating gear 9125, simultaneously the staff comes to splice two strengthening ribs 910 through using concatenation ring 911 to carry out further enhancement to the intensity of movable rod 2, thereby avoid after the longer time of movable rod 2 work, the shape of movable rod 2 changes, thereby make movable rod 2 break off, the condition that leads to the device to be unable to use appears.

The working principle is as follows: when the worker assembles the shell 1, the worker sleeves the two pressurizing blocks 111 on the movable rod 2, then installs the gasket 110 in the groove on the pressurizing block 111, then installs the first sealing ring 112 in the groove where the gasket 110 is installed, so that the first sealing ring 112 can play a role of sealing when the movable rod 2 moves, the gasket 110 installed under the first sealing ring 112 reduces the abrasion of the first sealing ring 112 in the pressurizing block 111 when the device normally works, after the worker sleeves the gasket 110 and the first sealing ring 112 on the pressurizing block 111, the worker sleeves the pressurizing block 111 on the movable rod 2, then installs the reinforcing ribs 910 on the two pressurizing blocks 111, and then installs the splicing ring 911 where the two reinforcing ribs 910 are spliced with each other, the staff thereby makes the turning block 9126 drive the turning gear 9125 rotation at rethread rotation turning block 9126 to making the turning gear 9125 drive the one side of installing the area 9122 that runs through of installing rodent 9124 to installation piece 9121 and removing, thereby making thereby the concatenation ring 911 be close to each other and make the concatenation with two strengthening ribs 910 that the concatenation ring 911 is firm together, later the staff inserts movable rod 2 to the casing 1 inside again, thereby make the device can normally work.

After the worker inserts the movable rod 2 into the housing 1, the worker seals the opening on one side of the housing 1 by rotating the fixing screw 8 through the sealing block 710, and the movable rod 2 penetrates through the sealing block 710, so as to prevent the sealing block 710 for sealing the housing 1 from obstructing the normal operation of the movable rod 2, after the worker installs the movable rod 2 into the housing 1, the worker needs to install two oil pipelines on the oil inlet 5, so that the device can operate normally, and when the worker installs the oil pipelines on the oil inlet 5 again, the sealing box 410 installed outside the oil inlet 5 seals the oil pipelines installed by the worker, so as to prevent the oil injected into the housing 1 from leaking out from the splicing part between the oil inlet 5 and the oil pipelines when the worker injects oil into the housing 1 to enable the device to operate normally, and after the staff installed oil inlet 5 and defeated oil pipe, the staff was at rotatory clamping screw 412 of rethread, thereby make two grip blocks 411 to remove between to, thereby make grip block 411 carry out the centre gripping to the concatenation department between oil inlet 5 and the defeated oil pipe, prevent with this that when the device drives the large-scale device that mutually supports with it and operates, oil inlet 5 and defeated oil pipe concatenation department can be because the produced rocking of operation of device, can lead to the wearing and tearing of concatenation department to increase, thereby lead to the circumstances that the oil leak appears in concatenation department, thereby influence the normal operating of device.

When the movable rod 2 repeatedly operates back and forth in the housing 1, the accommodating block 310 installed on one side of the sealing block 710 is opposite to the pressurizing block 111 after being contacted, the buffer spring 315 installed on one side of the buffer block 313 buffers the pressurizing block 111 contacted with the buffer block 313, so that the pressurizing block 111 and the inner wall of the sealing block 710 are prevented from colliding with each other when the movable rod 2 repeatedly operates back and forth, the abrasion of the pressurizing block 111 is increased, and the service life of the device is shortened.

When a worker detaches the device to clean the internal parts of the device or replace the first sealing ring 112 on the pressurizing block 111, the worker rotates the rotating handle 615 to rotate the first bevel gear 616 mounted on one side of the rotating handle 615 to rotate the second bevel gear 617, so as to move the moving rod 613 sleeved on the rotating screw 614 upward, so that the moving rod 613 ejects the sealing plate 612, thereby exposing the channel inside the oil pipe 610, allowing the liquid oil inside the housing 1 to flow out from the channel above the oil pipe 610, and allowing the worker to recover the residual oil inside the housing 1, thereby preventing the oil inside the housing 1 from flowing out to pollute the surrounding environment when the worker detaches the device, and before the worker rotates the rotating handle 615 to allow the moving rod 613 to eject the sealing plate 612, the sealing plate 612 effectively seals the oil outlet pipe 610 to prevent oil inside the casing 1 from dripping from the oil outlet pipe 610 and affecting the normal operation of the casing 1.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a drag pump air extraction unit is with having good hydro-cylinder piston of high strength sealing performance, includes casing (1), its characterized in that: the improved oil-water separator is characterized in that both ends of the shell (1) are connected with oil inlets (5), one ends of the oil inlets (5) extend to the interior of the shell (1), the other ends of the oil inlets (5) are sleeved with clamping mechanisms (4), both ends of the shell (1) are connected with discharge mechanisms (6), one ends of the discharge mechanisms (6) extend to the interior of the shell (1), one side of the shell (1) is connected with a sealing block (710), both sides of the sealing block (710) are provided with fixing screws (8) in a threaded manner, the other ends of the fixing screws (8) penetrate through the sealing block (710) and extend to the interior of the shell (1), one side of the sealing block (710) is provided with a movable rod (2) in a penetrating manner, one end of the movable rod (2) extends to the interior of the shell (1), and a second sealing ring (711) is arranged at one end, close to the movable rod (2), of, and the quantity of second sealing washer (711) is two, sealed piece (710) internally mounted of one side that second sealing washer (711) kept away from each other has antifriction circle (712), and antifriction circle (712) and second sealing washer (711) laminate each other, movable rod (2) extend to casing (1) inside surface cup joint and install add briquetting (111), and the quantity that adds briquetting (111) is two, the surface that adds briquetting (111) all installs packing ring (110), the other end of packing ring (110) all cup joints and installs first sealing washer (112), add briquetting (111) and all cup joint and install strengthening rib (910) near the movable rod (2) surface of one side each other, two the surface that strengthening rib (910) are close to one side each other cup joints and installs concatenation ring (911), buffer gear (3) are installed near one side that adds briquetting (111) to sealed piece (710), and the number of the buffer mechanisms (3) is two.

2. The cylinder piston with high strength and good sealing performance for the air extraction unit of the trailer pump of claim 1, is characterized in that: buffer gear (3) are including holding piece (310), hold piece (310) and install telescopic link (314) near one side of first sealing washer (112), and the quantity of telescopic link (314) is two, hold piece (310) one side between telescopic link (314) and install buffer spring (315), buffer block (313) are installed to the other end of telescopic link (314) and buffer spring (315), one side that holds piece (310) is installed and is placed piece (311), standing groove (312) are seted up to the inside one side of placing piece (311) of being close to of casing (1), and place piece (311) and extend to in standing groove (312).

3. The cylinder piston with high strength and good sealing performance for the air extraction unit of the trailer pump of claim 1, is characterized in that: fixture (4) are including seal box (410), clamping screw (412) are all installed to the both sides spiral of seal box (410), and inside clamping screw (412) run through to extend to seal box (410), grip block (411) are all installed to the inside clamping screw (412) of seal box (410) one side that is close to each other.

4. The cylinder piston with high strength and good sealing performance for the air extraction unit of the trailer pump of claim 1, is characterized in that: discharge mechanism (6) include oil pipe (610), the inside of oil pipe (610) is all installed and is placed platform (611), place inside one side of platform (611) and install first movable block (6191), the one end movable mounting of first movable block (6191) has closing plate (612), the one end fixed mounting of closing plate (612) has second movable block (6192), carriage release lever (613) is installed to the bottom of second movable block (6192), the one end of carriage release lever (613) extends to the inside of oil pipe (610), rotatory screw rod (614) is installed to the internal thread of oil pipe (610) one side, and carriage release lever (613) cup joints and installs on rotatory screw rod (614).

5. The cylinder piston with high strength and good sealing performance for the air extraction unit of the trailer pump of claim 4, is characterized in that: the outer surface of a rotating screw (614) at the bottom end of the moving rod (613) is sleeved with a second bevel gear (617), one side of the second bevel gear (617) is engaged with a first bevel gear (616), one side of the oil outlet pipe (610) is connected with a rotating handle (615), and one end of the rotating handle (615) extends to the inside of the oil outlet pipe (610) and is connected with the first bevel gear (616).

6. The cylinder piston with high strength and good sealing performance for the air extraction unit of the trailer pump of claim 4, is characterized in that: go out oil pipe (610) inside one side of being close to carriage release lever (613) and install installation pole (6181), the inside of installation pole (6181) is cup jointed and is installed connecting rod (6184), and the other end of connecting rod (6184) is connected with carriage release lever (613), spout (6182) have all been seted up to connecting rod (6184) both sides that are located installation pole (6181) inside, the inside all slidable mounting of spout (6182) has slider (6183), and the one end of slider (6183) is connected with connecting rod (6184).

7. The cylinder piston with high strength and good sealing performance for the air extraction unit of the trailer pump of claim 1, is characterized in that: the utility model discloses a building block, including concatenation ring (911), concatenation ring (911) one side is run through and is installed pivot (913), one side that pivot (913) were kept away from in concatenation ring (911) is installed supplementary piece (914), the one end of supplementary piece (914) is installed and is run through area (9122), installation piece (9121) is installed to the one end that concatenation ring (911) surface is close to supplementary piece (914), and runs through area (9122) and runs through installation piece (9121).

8. The cylinder piston with high strength and good sealing performance for the air extraction unit of the trailer pump of claim 7, is characterized in that: install rotation screw rod (9127) in one side screw thread of keeping away from concatenation ring (911) installation piece (9121), and rotate screw rod (9127) and extend to the inside of installation piece (9121), turning block (9126) is installed to rotation screw rod (9127) one end in installation piece (9121) outside, turning gear (9125) is installed to the one end that rotation screw rod (9127) extends to installation piece (9121) inside, mounting groove (9123) has been seted up to the bottom that runs through area (9122), and inside turning gear (9125) extends to mounting groove (9123), rodent (9124) are evenly installed to the one end of mounting groove (9123), and rodent (9124) and turning gear (9125) intermeshing.