CN214945390U - Hydraulic cylinder collapsing structure - Google Patents
Hydraulic cylinder collapsing structure Download PDFInfo
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- CN214945390U CN214945390U CN202023192729.3U CN202023192729U CN214945390U CN 214945390 U CN214945390 U CN 214945390U CN 202023192729 U CN202023192729 U CN 202023192729U CN 214945390 U CN214945390 U CN 214945390U
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Abstract
A hydraulic cylinder collapsing structure belongs to the technical field of hydraulic equipment. The utility model aims at increasing an explosion-proof device in the pneumatic cylinder to can deal with instantaneous (suddenly between) external pressure and adjust the balanced pneumatic cylinder bursting of pneumatic cylinder internal pressure and stretch the structure. The utility model discloses fixed mounting has the oil feed chamber between cylinder and U type clamp, supplies to install pneumatic cylinder decline oil inlet and the ascending oil inlet of pneumatic cylinder on the oil feed chamber, and pneumatic cylinder decline oil inlet passes through pneumatic cylinder decline branch pipe and descends to supply oil pipe intercommunication, and pneumatic cylinder ascending oil inlet passes through pneumatic cylinder ascending branch pipe and cylinder lower extreme intercommunication, descends to supply oil pipe and cylinder upper end intercommunication, installs piston rod seal structure at cylinder and piston rod contact site, and the piston rod is arranged in the one end in the cylinder and is had explosion-proof safety mechanism. The utility model discloses simple structure when the pneumatic cylinder receives instantaneous external force, plays the effect of stretching of bursting when the pneumatic cylinder receives instantaneous external force, protects passenger's safety.
Description
Technical Field
The utility model belongs to the technical field of hydraulic equipment.
Background
Lifting and descending of a large truck cab are completed by using a hydraulic oil cylinder, and lifting or descending of the cab is generally completed by filling oil into the hydraulic oil cylinder through operation of a manual electric pump. However, the existing lifting hydraulic cylinder has no safety problem in the process of no instantaneous external force, but sudden external force clamping may be generated due to various uncertain external force clamping, at the moment, a conventional hydraulic rod cannot cope with the sudden external force, the oil quantity in the cylinder cannot be adjusted in time due to the sudden external pressure, the hydraulic cylinder is possibly damaged, and unnecessary personnel danger is possibly caused.
Disclosure of Invention
The utility model aims at increasing an explosion-proof device in the pneumatic cylinder to can deal with instantaneous (suddenly between) external pressure and adjust the balanced pneumatic cylinder bursting of pneumatic cylinder internal pressure and stretch the structure.
The utility model comprises a cylinder barrel, a piston rod and a U-shaped clamp, wherein an oil supply cavity is fixedly arranged between the cylinder barrel and the U-shaped clamp, a hydraulic cylinder descending oil inlet and a hydraulic cylinder ascending oil inlet are arranged on the oil supply cavity, the hydraulic cylinder descending oil inlet is communicated with a descending oil supply pipe through a hydraulic cylinder descending branch pipe, the hydraulic cylinder ascending oil inlet is communicated with the lower end of the cylinder barrel through a hydraulic cylinder ascending branch pipe, and the descending oil supply pipe is communicated with the upper end of the cylinder barrel; one end of the safety pressure relief oil pipe is communicated with the middle part of the cylinder barrel, the other end of the safety pressure relief oil pipe is communicated with the oil supply cavity, and the oil supply cavity, the hydraulic cylinder ascending oil inlet and the hydraulic cylinder descending oil inlet are communicated with oil supply equipment; a piston rod sealing structure is arranged at the contact part of the cylinder barrel and the piston rod, and an explosion-proof safety mechanism is arranged at one end of the piston rod arranged in the cylinder barrel;
piston rod seal structure: the guide sleeve is fixedly clamped at the upper opening of the cylinder barrel and sleeved on the piston rod, the guide sleeve is divided into an inner cylinder part and an outer cylinder part, the outer edge of the inner cylinder part is tightly matched with the inner cavity of the cylinder barrel and is sealed by a sealing ring, a sealing ring is arranged between the guide sleeve and the piston rod, and a dust seal is arranged between the outer cylinder part and the piston rod; the guide sleeve is arranged at the tail end of the cylinder barrel and is in a bell mouth shape, a piston rod limiting groove is arranged on the inner side of the bell mouth shape, and the piston rod limiting groove corresponds to the limiting ring;
explosion-proof safety mechanism: the explosion-proof safety mechanism is arranged at the end part of the piston rod, an inclined groove is formed outside one end of the explosion-proof safety mechanism, which is close to the piston rod, a sealing snap ring is sleeved in the groove, an explosion-proof oil pressure cavity is arranged in the explosion-proof safety mechanism, one end of the explosion-proof oil pressure cavity is communicated with a cross oil cavity, the cross oil cavity is communicated with an inner cavity of the cylinder barrel through an oil port of the cross oil cavity, the other end of the explosion-proof oil pressure cavity is communicated with an inner cavity of an explosion-proof valve, the explosion-proof valve is arranged at the rear end of the explosion-proof safety mechanism, and explosion-proof valve rupture discs are arranged at the positions of an opening of the inner cavity of the explosion-proof valve, the explosion-proof oil pressure cavity and an oil outlet of the explosion-proof valve; the tail end of the explosion-proof safety mechanism and the explosion-proof valve are provided with a piston through threads, the outer side of the piston is in contact with the inner cavity of the cylinder barrel and is sealed through a Glare ring and a wear-resistant ring, and the inner cavity of the cylinder barrel is divided into an ascending oil cavity and a descending oil cavity by the piston.
The utility model discloses simple structure when the pneumatic cylinder receives instantaneous external force, plays the effect of stretching of bursting when the pneumatic cylinder receives instantaneous external force, protects passenger's safety.
Drawings
FIG. 1 is a sectional view of the whole mechanism of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1A according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1B of the present invention;
fig. 4 is the utility model discloses when the piston rod reached the ascending extreme position, the piston rod spacing groove of the last sealed snap ring of the explosion-proof safety mechanism of piston rod bottom and piston rod seal structure matches spacing effect picture.
FIG. 5 is a top view of the oil supply chamber of the present invention;
FIG. 6 is a schematic view of the flow direction of oil in the oil descending cavity to the oil ascending cavity when the explosion-proof safety mechanism of the present invention is in operation;
fig. 7 is a schematic view of the flow direction of the oil in the oil rising chamber to the oil falling chamber when the explosion-proof safety mechanism of the present invention is in operation.
Detailed Description
The utility model comprises a cylinder barrel 2, a piston rod 1 and a U-shaped clamp 7, wherein an oil supply cavity is fixedly arranged between the cylinder barrel 2 and the U-shaped clamp 7, a hydraulic cylinder descending oil inlet 6 and a hydraulic cylinder ascending oil inlet 23 are arranged on the oil supply cavity, the hydraulic cylinder descending oil inlet 6 is communicated with a descending oil supply pipe 3 through a hydraulic cylinder descending branch pipe 5, the hydraulic cylinder ascending oil inlet 23 is communicated with the lower end of the cylinder barrel 2 through a hydraulic cylinder ascending branch pipe 8, and the descending oil supply pipe 3 is communicated with the upper end of the cylinder barrel 2; one end of the safety pressure relief oil pipe 4 is communicated with the middle part of the cylinder barrel 2, the other end of the safety pressure relief oil pipe is communicated with the oil supply cavity, the hydraulic cylinder ascending oil inlet 6 and the hydraulic cylinder descending oil inlet 23 are communicated with the oil supply equipment, the oil supply cavity, the hydraulic cylinder ascending oil inlet 6 and the hydraulic cylinder descending oil inlet 23 are described as an oil way oil supply part, because the oil supply cavity, the hydraulic cylinder ascending oil inlet 6 and the hydraulic cylinder descending oil inlet 23 are connected with the oil supply equipment, oil in the cylinder barrel 2 can respectively complete oil supply of the upper cavity and the lower cavity through the hydraulic cylinder ascending oil inlet 6 and the hydraulic cylinder descending oil inlet 23, thereby completing lifting or descending of the hydraulic cylinder, the oil supply cavity is communicated with the safety pressure relief oil pipe 4, redundant oil in the cylinder barrel 2 can be returned to the oil supply equipment through the part, and because the safety pressure relief oil pipe 4 is communicated with the middle part of the cylinder barrel 2, no matter a piston is arranged on any side of the oil inlet of the safety pressure relief oil pipe 4, the oil drainage can be increased, so that the speed is relatively high when the cab is lifted or descended in the early stage, the speed is reduced in the later stage, the cab is lifted or descended slowly and safely in the later stage, the problem of damage caused by quick lifting or descending can not occur, a single valve is arranged between the safe pressure relief oil pipe 4 and the oil supply equipment, and the oil can be conveyed to the oil supply equipment only and cannot flow back. A piston rod sealing structure is arranged at the contact part of the cylinder barrel 2 and the piston rod 1, and the piston rod sealing structure can ensure that the piston rod can perform pull-plug movement relative to the cylinder barrel 2 and can also ensure the sealing performance. One end of the piston rod 1 arranged in the cylinder barrel 2 is provided with an explosion-proof safety mechanism, the conventional lifting or descending generally needs oil pressure of about 10-20Mpa, so the explosion-proof safety mechanism is basically in a completely closed state, when external force is instantaneously applied, the external force exceeds 40 Mpa, most of the situations are mostly generated in the descending process, the normal descending oil drainage process cannot be instantaneously completed, at the moment, the explosion-proof safety mechanism works, and the pressure can be instantaneously relieved in the instantaneous state through the mechanism, so the safety is ensured.
Piston rod seal structure: the guide sleeve 12 is fixedly clamped at the upper opening of the cylinder barrel 2 and sleeved on the piston rod 1, the guide sleeve 12 is divided into an inner cylinder part and an outer cylinder part 10, the outer edge of the inner cylinder part of the guide sleeve 12 is tightly matched with the inner cavity of the cylinder barrel 2 and is sealed through a sealing ring, a sealing ring 11 is arranged between the guide sleeve 12 and the piston rod 1, and a dust seal 9 is arranged between the outer cylinder part 10 and the piston rod 1; the guide sleeve 12 is arranged at the tail end of the cylinder barrel 2 and is in a bell mouth shape 13, a piston rod limiting groove 24 is arranged on the inner side of the bell mouth shape 13, and the piston rod limiting groove 24 corresponds to the limiting ring 16; the guide sleeve 12 is a transfer seal, the guide sleeve 12 being fixedly connected to the cylinder barrel 2 and its cylinder inner part completely sealing against the inner wall of the cylinder barrel 2, the seal being reinforced by sealing rings, which may have crevices due to the steel seal. The piston rod 1 and the guide sleeve 12 are completely sealed by double-layer sealing (the dust seal 9 and the sealing ring 11), so that oil in the cylinder 2 cannot flow out even if the piston rod 1 is drawn and inserted relative to the cylinder 2.
Explosion-proof safety mechanism: the explosion-proof safety mechanism 15 is arranged at the end part of the piston rod 1, one end of the explosion-proof safety mechanism 15, which is close to the piston rod 1, is externally provided with an oblique groove 26, a sealing snap ring 16 is sleeved in the groove 26, an explosion-proof oil pressure cavity 25 is arranged in the explosion-proof safety mechanism 15, one end of the explosion-proof oil pressure cavity 25 is communicated with a cross oil cavity 17, the cross oil cavity 17 is communicated with the inner cavity of the cylinder barrel 2 through a cross oil cavity oil port 14, the other end of the explosion-proof oil pressure cavity 25 is communicated with the inner cavity of an explosion-proof valve 21, the explosion-proof valve 21 is arranged at the rear end of the explosion-proof safety mechanism 15, and explosion-proof valve rupture discs 22 are arranged at the openings of the inner cavity of the explosion-proof valve 21, the explosion-proof oil pressure cavity 25 and the oil outlet of the explosion-proof valve 21; a piston 20 is installed at the tail end of the explosion-proof safety mechanism 15 and an explosion-proof valve 21 through threads, the outer side of the piston 20 is in contact with the inner cavity of the cylinder barrel 2 and is sealed through a Glare ring 18 and a wear-resisting ring 19, and the piston 20 divides the inner cavity of the cylinder barrel 2 into an ascending oil cavity 28 and a descending oil cavity 27. The explosion-proof safety mechanism 15 is a safe pressure relief mechanism, the general conventional bearing capacity that sets up of inside explosion-proof valve rupture disk 22 pressure-bearing is at 40 Mpa, no matter descend or lift, when pressure is greater than 40 Mpa suddenly within a definite time, explosion-proof valve rupture disk 22 can break open rapidly, make things convenient for the circulation of oil, and explosion-proof valve rupture disk 22 damages the back, need to change the explosion-proof valve 21 that has intact explosion-proof valve rupture disk 22, for convenient dismantlement, explosion-proof valve 21 is a device that can conveniently dismantle, in order to strengthen its fixity, it is its tip at explosion-proof safety mechanism 15 with its centre gripping through piston 20 with explosion-proof safety mechanism 15 threaded connection again. The piston 20 is a piston mechanism that divides the inside of the cylinder tube 2 into two oil chambers, an ascending oil chamber 28 and a descending oil chamber 27, and the piston rod 1 is lifted or lowered by injecting oil into the ascending oil chamber 28 or the descending oil chamber 27, and the cab is also lifted or lowered. The cross oil chamber 17 is only a channel for communicating the explosion-proof oil pressure chamber 25 with the cylinder barrel 2, and is only convenient for oil in the cylinder barrel 2 to enter or flow out of the explosion-proof oil pressure chamber 25 after the explosion-proof valve rupture disc 22 is damaged. The greige ring 18 and the wear ring 19 are conventional sealing means and are only used in the present invention to seal the piston 20 to ensure that the oil at the ends of the piston does not flow through each other. The sealing snap ring 16 is a limiting device and is matched with the shape of the piston rod limiting groove 24, when the piston rod 1 is lifted, the sealing snap ring 16 is in contact with the limit of the piston rod limiting groove 24, namely the piston rod 1 is completely contacted, namely the lifting limit of the piston rod 1, and rigid contact is placed to damage the piston rod 1.
Claims (1)
1. The utility model provides a hydraulic cylinder bursting extension structure, includes cylinder (2), piston rod (1), U type clamp (7), its characterized in that: an oil supply cavity is fixedly arranged between the cylinder barrel (2) and the U-shaped clamp (7), a hydraulic cylinder descending oil inlet (6) and a hydraulic cylinder ascending oil inlet (23) are arranged on the oil supply cavity, the hydraulic cylinder descending oil inlet (6) is communicated with the descending oil supply pipe (3) through a hydraulic cylinder descending branch pipe (5), the hydraulic cylinder ascending oil inlet (23) is communicated with the lower end of the cylinder barrel (2) through a hydraulic cylinder ascending branch pipe (8), and the descending oil supply pipe (3) is communicated with the upper end of the cylinder barrel (2); one end of the safety pressure relief oil pipe (4) is communicated with the middle part of the cylinder barrel (2), the other end of the safety pressure relief oil pipe is communicated with the oil supply cavity, and the oil supply cavity, the hydraulic cylinder descending oil inlet (6) and the hydraulic cylinder ascending oil inlet (23) are communicated with oil supply equipment; a piston rod sealing structure is arranged at the contact part of the cylinder barrel (2) and the piston rod (1), and an explosion-proof safety mechanism is arranged at one end of the piston rod (1) arranged in the cylinder barrel (2);
piston rod seal structure: the guide sleeve (12) is fixedly clamped at the upper opening of the cylinder barrel (2) and sleeved on the piston rod (1), the guide sleeve (12) is divided into an inner cylinder part and an outer cylinder part (10), the outer edge of the inner cylinder part of the guide sleeve (12) is tightly matched with the inner cavity of the cylinder barrel (2) and is sealed through a sealing ring, a sealing ring (11) is arranged between the guide sleeve (12) and the piston rod (1), and a dust seal (9) is arranged between the outer cylinder part (10) and the piston rod (1); the guide sleeve (12) is arranged at the tail end of the cylinder barrel (2) and is in a bell mouth shape (13), a piston rod limiting groove is arranged on the inner side of the bell mouth shape (13), and the piston rod limiting groove corresponds to the limiting ring (24);
explosion-proof safety mechanism: the anti-explosion safety mechanism (15) is arranged at the end part of the piston rod (1), one end of the anti-explosion safety mechanism (15), which is close to the piston rod (1), is externally provided with an oblique groove (26), a sealing snap ring (16) is sleeved in the groove (26), an anti-explosion oil pressure cavity (25) is arranged in the anti-explosion safety mechanism (15), one end of the anti-explosion oil pressure cavity (25) is communicated with a cross oil cavity (17), the cross oil cavity (17) is communicated with the inner cavity of the cylinder barrel (2) through a cross oil cavity oil port (14), the other end of the anti-explosion oil pressure cavity (25) is communicated with the inner cavity of the anti-explosion valve (21), the anti-explosion valve (21) is arranged at the rear end of the anti-explosion safety mechanism (15), and anti-explosion valve rupture discs (22) are respectively arranged at the through hole of the anti-explosion oil pressure cavity (25) and the oil outlet of the anti-explosion valve (21); a piston (20) is installed at the tail end of the explosion-proof safety mechanism (15) and an explosion-proof valve (21) through threads, the outer side of the piston (20) is in contact with the inner cavity of the cylinder barrel (2) and is sealed through a Glae ring (18) and a wear-resisting ring (19), and the piston (20) divides the inner cavity of the cylinder barrel (2) into an ascending oil cavity (28) and a descending oil cavity (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023192729.3U CN214945390U (en) | 2020-12-27 | 2020-12-27 | Hydraulic cylinder collapsing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023192729.3U CN214945390U (en) | 2020-12-27 | 2020-12-27 | Hydraulic cylinder collapsing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214945390U true CN214945390U (en) | 2021-11-30 |
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ID=79115617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023192729.3U Active CN214945390U (en) | 2020-12-27 | 2020-12-27 | Hydraulic cylinder collapsing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214945390U (en) |
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2020
- 2020-12-27 CN CN202023192729.3U patent/CN214945390U/en active Active
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