CN212455040U - Large-diameter jack cylinder with external mechanical lock - Google Patents
Large-diameter jack cylinder with external mechanical lock Download PDFInfo
- Publication number
- CN212455040U CN212455040U CN202021024252.5U CN202021024252U CN212455040U CN 212455040 U CN212455040 U CN 212455040U CN 202021024252 U CN202021024252 U CN 202021024252U CN 212455040 U CN212455040 U CN 212455040U
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- piston rod
- cylinder
- ring
- mounting block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003921 oil Substances 0.000 claims abstract description 26
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims description 26
- 210000004907 gland Anatomy 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 19
- 125000003003 spiro group Chemical group 0.000 claims description 2
- 239000004429 Calibre Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Actuator (AREA)
Abstract
The utility model relates to a large-diameter jack cylinder with an external mechanical lock, which comprises a cylinder body, a piston rod, a guide sleeve assembly and a piston ring, wherein the piston ring divides an inner cavity of the cylinder body into an oil inlet cavity and an oil return cavity, and the oil inlet cavity and the oil return cavity are connected with a hydraulic oil system; the mounting block is fixedly arranged at the front end of the piston rod and is of an annular structure, a support nut is screwed outside the mounting block, a spiral fit is formed between the inner ring of the support nut and the outer wall of the mounting block, and the rear end of the support nut forms a butting part matched with the front end of the cylinder body. The piston rod is enabled to be abutted against the cylinder body by the supporting nut to realize self-locking of the piston rod, and the safety of the oil cylinder is improved.
Description
Technical Field
The utility model relates to the field of machinary, concretely relates to heavy-calibre jack cylinder of external mechanical lock in area.
Background
The existing jack cylinder is mainly used with a small diameter, and the diameter is generally 100-200 mm; the oil cylinders mainly depend on a hydraulic oil system to drive a piston rod to extend out, and then the self-locking of the piston rod is realized by controlling the backflow of hydraulic oil through the closing of a valve in the hydraulic oil system.
At present, aiming at a developed large-caliber jack oil cylinder, the diameter of the oil cylinder is close to half a meter, the working pressure of the oil cylinder reaches 70MPa, the experimental pressure is 80MPa, the working pressure is increased, and aiming at self-locking of a piston rod, if a hydraulic oil system is still adopted for self-locking, the safety of the self-locking of the piston rod cannot be guaranteed, so that other mechanisms are required to be added to ensure the safety of the piston rod during operation.
Secondly, in the oil cylinder, the front end of the cylinder body is provided with a guide sleeve which is used for sealing between the piston rod and the cylinder body (an inner sealing ring and an outer sealing ring are arranged on the guide sleeve), in the past, because the diameter of the oil cylinder is smaller, the guide sleeve is directly screwed in the mounting port at the front end of the cylinder body, but now, as the diameter of the oil cylinder and the working oil pressure become larger, the diameter of the guide sleeve also becomes larger correspondingly, and need set up more sealing rings on the uide bushing and prevent the oil leak, consequently, still adopt the rotation fit between major diameter uide bushing and the cylinder body, there is friction fit between interior sealing ring and the outer seal ring on the uide bushing and the piston rod and the cylinder body inner wall respectively, need provide very circumference revolving force and make the uide bushing install on the cylinder body, the installation becomes very difficult, consequently, also need design a mounting means to uide bushing on the major diameter.
In summary, for a jack cylinder with a large caliber, the self-locking safety of the piston rod cannot be guaranteed, and the guide sleeve is inconvenient to install.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the large-diameter jack cylinder overcomes the defects of the prior art, provides the large-diameter jack cylinder with the external mechanical lock, and solves the problem that the self-locking safety of the piston rod of the large-diameter jack cylinder cannot be ensured.
The utility model provides a technical scheme that its technical problem adopted is:
a large-diameter jack cylinder with an external mechanical lock comprises a cylinder body, a piston rod, a guide sleeve assembly and a piston ring, wherein the piston ring divides an inner cavity of the cylinder body into an oil inlet cavity and an oil return cavity, and the oil inlet cavity and the oil return cavity are connected with a hydraulic oil system;
the mounting block is fixedly arranged at the front end of the piston rod and is of an annular structure, a support nut is screwed outside the mounting block, a spiral fit is formed between the inner ring of the support nut and the outer wall of the mounting block, and the rear end of the support nut forms a butting part matched with the front end of the cylinder body.
Furthermore, outer trapezoidal threads are arranged outside the mounting block, inner trapezoidal threads are arranged on the inner wall of the supporting nut, and trapezoidal thread matching is formed between the supporting nut and the mounting block.
Furthermore, a triangular thread fit or a trapezoidal thread fit is formed between the piston rod and the mounting block.
Further, the diameter of the cylinder body is 450-500 mm.
Further, the guide sleeve assembly comprises a guide sleeve and a gland;
the cylinder body front end is seted up the installation step hole, be equipped with the internal thread in the installation step hole, be provided with the external screw thread on the gland, be equipped with the installation step ring on the uide bushing, the uide bushing shelves in the installation step hole through the installation step ring, the gland spiro union is in the installation step hole to support the installation step ring of uide bushing in the installation step hole tightly.
Further, an outer sealing ring which is used for forming sealing fit with the inner wall of the cylinder body is arranged on the outer wall of the guide sleeve;
the inner wall of the guide sleeve is provided with an inner sealing ring which is used for forming sealing fit with the outer wall of the piston rod.
The utility model has the advantages that:
the utility model provides a take external mechanical lock heavy-calibre jack cylinder, except can making the jack cylinder when the operation, except that the hydraulic oil system who relies on self controls the piston rod auto-lock, can also be through adjusting the position of support nut, make the piston rod rely on support nut butt cylinder body to realize the auto-lock to the piston rod, the security of promotion hydro-cylinder.
Change the swivelling joint's of traditional small-bore hydro-cylinder uide bushing into present step complex uide bushing + gland combination and install, the utility model discloses an among the jack hydro-cylinder, the uide bushing that has the sealing washer is not doing the normal running fit, directly press into in the mounting hole in the assembly can, axial locking relies on the rotation of solitary gland to realize, and sealed quantity on the gland is less than the sealing washer on the uide bushing far away, consequently, the gland is more light in the time with cylinder body normal running fit.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a semi-sectional view of a large-diameter jack cylinder with an external mechanical lock according to the present invention;
FIG. 2 is a schematic view of a guide sleeve assembly;
the device comprises a cylinder body 1, a cylinder body 2, a guide sleeve assembly 21, a guide sleeve 22, a gland 3, an installation block 4, a support nut 5 and a piston rod.
Detailed Description
The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.
Examples
As shown in figure 1, a heavy-calibre jack cylinder of external mechanical lock in area, including cylinder body 1, piston rod 5, uide bushing 21 subassembly 2 and piston ring, the piston ring is separated the cylinder body 1 inner chamber for oil feed chamber and oil return chamber, oil feed chamber and oil return chamber are connected the hydraulic oil system.
The front end of the piston rod 5 is fixedly provided with an installation block 3, the installation block 3 is of an annular structure, a support nut 4 is screwed outside the installation block 3, a spiral fit is formed between the inner ring of the support nut 4 and the outer wall of the installation block 3, and the rear end of the support nut 4 is used for abutting part matched with the front end of the cylinder body 1.
Specifically, in this embodiment, the outer portion of the mounting block 3 is provided with an outer trapezoidal thread, the inner wall of the support nut 4 is provided with an inner trapezoidal thread, and the support nut 4 and the mounting block 3 are matched with each other by a trapezoidal thread.
Trapezoidal thread can promote the support intensity of installation piece 3 to support nut 4 greatly, is difficult to appear the thread and slips the tooth.
Specifically, in this embodiment, a triangular thread fit or a trapezoidal thread fit is formed between the piston rod 5 and the mounting block 3.
Specifically, in the present embodiment, the diameter of the cylinder 1 is 450 to 500mm, preferably 480mm, the diameter of the piston rod 5 is 380mm, and the diameter of the piston rod 5 is 100 mm.
During the operation, after hydraulic oil system control piston rod 5 stretches out, the valve is closed in the hydraulic oil system, prevent the hydraulic oil backward flow, the realization is to 5 auto-locks of piston rod, then rotate supporting nut 4, make supporting nut 4 rearward movement, contact the butt until the ground connection portion of supporting nut 4 and cylinder body 1 front end, 5 auto-locks of piston rod at this time have obtained dual assurance, hydraulic oil system and supporting nut 4 promptly, even the condition that hydraulic oil system damaged appears, it also can prevent piston rod 5 rearward movement to singly rely on supporting nut 4.
As shown in fig. 1 and 2, the guide sleeve assembly 2 comprises a guide sleeve 21 and a gland 22; the front end of the cylinder body 1 is provided with a mounting step hole, an internal thread is arranged in the mounting step hole, an external thread is arranged on the gland 22, a mounting step ring is arranged on the guide sleeve 21, the guide sleeve 21 is placed in the mounting step hole through the mounting step ring, the gland 22 is screwed in the mounting step hole, and the mounting step ring of the guide sleeve 21 is abutted against the mounting step hole.
Specifically, in this embodiment, the outer wall of the guide sleeve 21 is provided with two outer sealing rings for forming a sealing fit with the inner wall of the cylinder body 1; the inner wall of the guide sleeve 21 is provided with two inner sealing rings for forming sealing fit with the outer wall of the piston rod 5.
When the guide sleeve assembly 2 is installed, the guide sleeve 21 is hoisted through the hoisting hole in the guide sleeve 21, the guide sleeve 21 is slowly moved downwards, the installation step ring of the guide sleeve 21 is matched with the installation step hole, then the gland 22 is hoisted, the gland 22 is in spiral connection with the cylinder body 1, the gland 22 is screwed at the front end of the cylinder body 1, and the gland 22 tightly presses the guide sleeve 21.
The surface of the gland 22 is flush with the front end surface of the cylinder 1, and the support nut 4 abuts on the gland 22 when supporting the front end of the cylinder 1.
The utility model discloses a heavy-calibre jack cylinder promotes the auto-lock security of piston rod 5 to the installation of uide bushing 21 on the cylinder body 1 has been made things convenient for.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. A large-diameter jack cylinder with an external mechanical lock is characterized by comprising a cylinder body, a piston rod, a guide sleeve assembly and a piston ring, wherein the piston ring divides an inner cavity of the cylinder body into an oil inlet cavity and an oil return cavity, and the oil inlet cavity and the oil return cavity are connected with a hydraulic oil system;
the mounting block is fixedly arranged at the front end of the piston rod and is of an annular structure, a support nut is screwed outside the mounting block, a spiral fit is formed between the inner ring of the support nut and the outer wall of the mounting block, and the rear end of the support nut forms a butting part matched with the front end of the cylinder body.
2. The large-caliber jack cylinder with an external mechanical lock as claimed in claim 1, wherein the mounting block is externally provided with external trapezoidal threads, the inner wall of the support nut is provided with internal trapezoidal threads, and the support nut and the mounting block are matched with each other by trapezoidal threads.
3. The large-caliber jack cylinder with external mechanical lock of claim 1, wherein the piston rod and the mounting block form a triangular thread fit or a trapezoidal thread fit.
4. The large-caliber jack cylinder with external mechanical lock as claimed in claim 1, wherein the diameter of the cylinder body is 450-500 mm.
5. The large jack cylinder with external mechanical lock of claim 1 or 4, wherein said guide sleeve assembly comprises a guide sleeve and a gland;
the cylinder body front end is seted up the installation step hole, be equipped with the internal thread in the installation step hole, be provided with the external screw thread on the gland, be equipped with the installation step ring on the uide bushing, the uide bushing shelves in the installation step hole through the installation step ring, the gland spiro union is in the installation step hole to support the installation step ring of uide bushing in the installation step hole tightly.
6. The large jack cylinder with external mechanical lock of claim 5,
the outer wall of the guide sleeve is provided with an outer sealing ring which is used for forming sealing fit with the inner wall of the cylinder body;
the inner wall of the guide sleeve is provided with an inner sealing ring which is used for forming sealing fit with the outer wall of the piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021024252.5U CN212455040U (en) | 2020-06-05 | 2020-06-05 | Large-diameter jack cylinder with external mechanical lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021024252.5U CN212455040U (en) | 2020-06-05 | 2020-06-05 | Large-diameter jack cylinder with external mechanical lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212455040U true CN212455040U (en) | 2021-02-02 |
Family
ID=74492527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021024252.5U Expired - Fee Related CN212455040U (en) | 2020-06-05 | 2020-06-05 | Large-diameter jack cylinder with external mechanical lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212455040U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151408A (en) * | 2021-12-03 | 2022-03-08 | 张家港赫斯曼液压设备有限公司 | Single-rod self-locking type double-acting hydraulic actuator |
-
2020
- 2020-06-05 CN CN202021024252.5U patent/CN212455040U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151408A (en) * | 2021-12-03 | 2022-03-08 | 张家港赫斯曼液压设备有限公司 | Single-rod self-locking type double-acting hydraulic actuator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212455040U (en) | Large-diameter jack cylinder with external mechanical lock | |
| CN110259761A (en) | Anti-rotation hydraulic cylinder piston rod displacement sensor mounting structure | |
| CN107630810A (en) | Plunger for hydraulic pump | |
| CN212250298U (en) | Medium speed engine injection pump | |
| CN207145370U (en) | A kind of contractile two-stage hydraulic cylinder of fuel feed pump | |
| CN114017509B (en) | Easy-to-detach axial-flow valve | |
| CN214888060U (en) | Compact height-adjustable oil cylinder and coal mining machine | |
| CN112901593A (en) | Compact height-adjustable oil cylinder and coal mining machine | |
| EP0784159A1 (en) | Hydraulic actuator, particularly for tipping an industrial vehicle cab | |
| CN209458221U (en) | A kind of pilot-operated hydraulic lock | |
| CN201099279Y (en) | Hydraulic exchanger for controlling standby booster pump | |
| CN206917629U (en) | A kind of gradually deblocking packer of low deblocking load | |
| CN220727198U (en) | High-pressure rotary valve for wellhead of oil well | |
| CN211715185U (en) | Oil filter oil discharge port structure | |
| CN218971886U (en) | Refitting structure for manual plug valve to automatic plug valve | |
| CN111425161A (en) | Packing box | |
| CN110439872B (en) | Tubular hydraulic lock | |
| CN110925265A (en) | Maximum stroke self-adjusting hydraulic cylinder | |
| CN215761593U (en) | Leakage control device for wellhead | |
| CN219911811U (en) | Regulation valve convenient to adjust flow size | |
| CN220320007U (en) | Long-stroke hydraulic cylinder piston device | |
| CN208764028U (en) | Main piling oil cylinder | |
| CN215719916U (en) | Oil cylinder structure capable of being connected in series | |
| CN2563293Y (en) | Casing blanking plug for hydraulic changing valve with pressure | |
| CN209877758U (en) | Simple artillery stopping machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210202 |