CN107237795A - Mechanical interlocking hydraulic jack - Google Patents
Mechanical interlocking hydraulic jack Download PDFInfo
- Publication number
- CN107237795A CN107237795A CN201710676841.8A CN201710676841A CN107237795A CN 107237795 A CN107237795 A CN 107237795A CN 201710676841 A CN201710676841 A CN 201710676841A CN 107237795 A CN107237795 A CN 107237795A
- Authority
- CN
- China
- Prior art keywords
- latch segment
- cylinder body
- piston
- chute
- hydraulic jack
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The present invention relates to hydraulic jack equipment technical field, more particularly, to a kind of mechanical interlocking hydraulic jack, including cylinder body, piston and piston rod, the piston is arranged on the piston rod, the piston is slidably arranged in the cylinder body, and the cylinder body is divided into spaced rod chamber and rodless cavity, also include latch segment and spring, the cylinder body is provided with the first hydraulic fluid port connected with the rod chamber, the cylinder body is provided with the second hydraulic fluid port connected with the rodless cavity, the contact surface of the piston and the cylinder body internal perisporium offers chute, the chute matches with the latch segment, mechanical interlocking hydraulic jack of the present invention is when in use, when piston rod is retracted in cylinder body, by setting latch segment to be cooperated with the annular slot on inboard wall of cylinder block on piston, so that piston rod is fixed, the protective effect to hydraulic jack is played when hydraulic jack fails.
Description
Technical field
The present invention relates to hydraulic jack equipment technical field, more particularly, to a kind of mechanical interlocking hydraulic jack.
Background technology
With the fast development of China's economic construction, hydraulic system is increasingly increasing in the application of engineering machinery field.
Hydraulic system be using hydraulic oil as working media, using hydraulic oil pressure energy and pass through hydraulic control component etc. manipulate hydraulic pressure
The package unit of executing agency's work.Hydraulic jack is that hydraulic energy is changed into mechanical energy in hydraulic system, and it is past to do straight line
The hydraulic actuator of multiple motion or oscillating motion.Realized with it during reciprocating motion, without drive gap, stable movement, because
This is used widely in various mechanical hydraulic systems.
Hydraulic jack generally includes gray iron, piston and piston rod, and piston is fixed on the piston rod by nut etc.,
Cylinder body is divided into rod chamber and rodless cavity.Existing oil cylinder is in failure, because piston rod does not protect locking device to piston rod
Fix, stretched out under the active force of piston rod itself, band piston is slided in cylinder body, so as to cause piston and work
Stopper rod is collided with cylinder body so that cylinder body, piston or piston rod are damaged, when there is staff on the scene, it is easy to making
Obtain staff injured.
The content of the invention
The technical problem to be solved in the present invention is：In order to solve existing oil cylinder in failure, because piston rod is not protected
The problem of locking device is fixed to piston rod, now there is provided a kind of mechanical interlocking hydraulic jack.
The technical solution adopted for the present invention to solve the technical problems is：A kind of mechanical interlocking hydraulic jack, including cylinder body,
Piston and piston rod, the piston are arranged on the piston rod, and the piston is slidably arranged in the cylinder body, and will be described
Cylinder body is divided into spaced rod chamber and rodless cavity, in addition to latch segment and spring, and the cylinder body is provided with to be had with described
First hydraulic fluid port of rod cavity connection, the cylinder body is provided with the second hydraulic fluid port connected with the rodless cavity, the piston and the cylinder
The contact surface of internal perisporium offers chute, and the chute matches with the latch segment, and the latch segment is slidably arranged in institute
State in chute, the spring is arranged between the latch segment and the chute, the cylinder body internal perisporium away from piston rod one
End offers annular slot, and the annular slot matches with the latch segment, and the annular slot is located in the rodless cavity,
The latch segment is fastened in the annular slot, and the latch segment is provided with the scope of operation, when hydraulic oil acts on the operation
During face, force latch segment to be slided in chute and compression spring under the active force of hydraulic oil, and cause latch segment to depart from annular
Neck.
The present invention, in rodless cavity oil-feed, is acted on latch segment by setting latch segment on piston by hydraulic oil
The scope of operation on, force latch segment to be slided in chute and compression spring under the active force of hydraulic oil, and latch segment is taken off
From annular slot, piston rod can be slided in cylinder body, in rod chamber oil-feed, and hydraulic oil promotes piston to be slided in cylinder body, when
Latch segment on piston and annular slot to it is corresponding when latch segment be fastened under the force of a spring in annular slot, so as to limit
The displacement of piston rod has been made, has effectively prevented hydraulic jack in failure, piston rod stretches out the phenomenon of cylinder body.
Enter due to having hydraulic oil between chute and latch segment, that is, into hydraulic pressure in the space of spring one end
Oil, so as to cause in rodless cavity oil-feed, the power for the scope of operation that hydraulic oil is acted on latch segment can not make latch segment in chute
It is interior to slide, there is latch segment stuck phenomenon, be so accomplished by hydraulic jack demolition and maintenance, that is, by between chute and latch segment
Hydraulic oil remove, it is relatively time-consuming to take a lot of work, reduce operating efficiency, further, passage, the passage are offered on the piston
One end connected with the chute, the other end of the passage is connected with the rod chamber.By setting passage on piston,
During rodless cavity oil-feed, the hydraulic oil in chute will be entered in rod chamber by passage, prevent the phenomenon that latch segment is stuck, when
During rod chamber oil-feed, while when spring force is snapped onto in neck insufficient for latch segment, hydraulic oil has individual upward to latch segment
The active force on top, so that latch segment card is set in annular slot.
For the ease of the processing and manufacture of piston upper channel, further, the piston includes pedestal and plunger, the base
Seat is arranged on the piston rod, and the plunger is detachably connected on the one end of pedestal away from piston rod, and the chute is arranged on
On the plunger, first through hole is offered on the plunger, the first through hole is connected with chute, is offered on the pedestal
Two through holes, are interconnected between the first through hole and second through hole and form passage.By the way that pedestal and plunger are constituted
Piston, plunger screw is connected on pedestal, and the first through hole connected with chute is opened up on plunger, while being opened on pedestal
It is interconnected if the second through hole, between first through hole and the second through hole and forms passage, reduces the difficulty of processing of piston upper channel.
In order to preferably make the hydraulic oil in chute be discharged by passage, it is ensured that latch segment smoothly departs from annular slot, enters
One step, the slideway matched with spring is offered on the latch segment, the slideway is set along latch segment direction of displacement, described
Spring is arranged in the slideway, and pod apertures are provided with the latch segment, and the pod apertures and the slideway are arranged in a crossed manner simultaneously
It is interconnected, the pod apertures are corresponding with one end that the passage is located at chute and connect.Slideway to spring have be oriented to and
Position-limiting action so that latch segment can be snapped onto smoothly in annular slot, while pod apertures cause the liquid in spring bottom space
Force feed can be entered in passage by pod apertures, the phenomenon for preventing the hydraulic oil being more than from causing latch segment card to set.
Because latch segment is when snapping onto in annular slot, cylinder body internal perisporium can be caused to hit under the force of a spring
Hit, cylinder interior damage parts can be caused for a long time, further, damping ring is provided with the annular slot.In order to reduce locking
Shock of the block to cylinder body, by setting damping ring in annular slot so that latch segment is when snapping onto annular slot and vibration damping
Ring is contacted, so as to reduce impact of the latch segment to cylinder body.
Because latch segment is when snapping onto in annular slot, cylinder body internal perisporium can be caused to hit under the force of a spring
Hit, cylinder interior damage parts can be caused for a long time, further, the latch segment is provided with nylon spacer close to the side of cylinder body.
In order to reduce shock of the latch segment to cylinder body, by setting nylon spacer on latch segment so that latch segment is snapping onto annular
During neck, nylon spacer is contacted with inboard wall of cylinder block, so as to reduce impact of the latch segment to cylinder body.
The beneficial effects of the invention are as follows：Mechanical interlocking hydraulic jack of the present invention when in use, cylinder body is retracted in piston rod
When interior, by setting latch segment to be cooperated with the annular slot on inboard wall of cylinder block on piston so that piston rod is limited solid
It is fixed, the protective effect to hydraulic jack is played when hydraulic jack fail, it is to avoid existing oil cylinder is when failing, due to piston rod
Do not protect locking device to fix piston rod, stretched out under the active force of piston rod itself, band piston is in cylinder
Slide in vivo, so as to cause piston to be collided with piston rod with cylinder body so that cylinder body, piston or piston rod are damaged, and are being had
When staff is on the scene, it is easy to pair cause the problem of staff is injured.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the front view of the embodiment of the present invention 1；
Fig. 2 is A-A sectional views in Fig. 1；
Fig. 3 is the partial enlarged drawing of B in Fig. 1；
Fig. 4 is the structural representation between cylinder body and latch segment in the embodiment of the present invention 1；
Fig. 5 is the structural representation between cylinder body and latch segment in the embodiment of the present invention 2.
In figure：1st, cylinder body, 101, rod chamber, 102, rodless cavity, the 103, first hydraulic fluid port, the 104, second hydraulic fluid port, 105, annular
Neck, 2, piston, 201, pedestal, 202, plunger, 3, piston rod, 4, latch segment, 401, the scope of operation, 5, spring, 6, chute, 7, logical
Road, 8, first through hole, the 9, second through hole, 10, slideway, 11, pod apertures, 12, damping ring, 13, nylon spacer.
Embodiment
Presently in connection with accompanying drawing, the present invention will be further described in detail.These accompanying drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
Embodiment 1
As Figure 1-4, a kind of mechanical interlocking hydraulic jack, including cylinder body 1, piston 2 and piston rod 3, the piston 2 are set
Put on the piston rod 3, the piston 2 is slidably arranged in the cylinder body 1, and be to be spaced from each other by 1 point of the cylinder body
Rod chamber 101 and rodless cavity 102, in addition to latch segment 4 and spring 5, the cylinder body 1 with the rod chamber 101 provided with connecting
The first logical hydraulic fluid port 103, the cylinder body 1 is provided with the second hydraulic fluid port 104 connected with the rodless cavity 102, the piston 2 and institute
The contact surface for stating the internal perisporium of cylinder body 1 offers chute 6, and the chute 6 matches with the latch segment 4, and the latch segment 4 is slided
It is arranged in the chute 6, the spring 5 is arranged between the latch segment 4 and the chute 6, the internal perisporium of cylinder body 1 is remote
One end from piston rod 3 offers annular slot 105, and the annular slot 105 matches with the latch segment 4, the annular
Neck 105 is located in the rodless cavity 102, and the latch segment 4 is fastened in the annular slot 105, is set on the latch segment 4
There is the scope of operation 401, there is gap, when hydraulic oil acts on the scope of operation between the scope of operation 401 and the internal perisporium of annular slot 105
When 401, force latch segment 4 to be slided and compression spring 5 in chute 6 under the active force of hydraulic oil, and latch segment 4 is departed from
Annular slot 105.Latch segment 4 includes sliding block and limited block simultaneously, and sliding block is fixedly connected by screw with limited block, sliding block and cunning
What groove 6 matched, and the stopper slot matched with limited block is offered on the piston 2, limited block is arranged in chute 6.
Passage 7 is offered on the piston 2, one end of the passage 7 is connected with the chute 6, the passage 7 it is another
End is connected with the rod chamber 101.
The piston 2 includes pedestal 201 and plunger 202, and the pedestal 201 is arranged on the piston rod 3, the plunger
202 are threaded in the one end of pedestal 201 away from piston rod 3, and the chute 6 is arranged on the plunger 202, the plunger
First through hole 8 is offered on 202, the first through hole 8 is connected with chute 6, and the second through hole 9, institute are offered on the pedestal 201
State and passage 7 is interconnected and formed between first through hole 8 and second through hole 9.
Offer the slideway 10 matched with spring 5 on the latch segment 4, the slideway 10 is along the direction of displacement of latch segment 4
Set, the spring 5 is arranged in the slideway 10, and pod apertures 11, the pod apertures 11 and institute are provided with the latch segment 4
State slideway 10 arranged in a crossed manner and be interconnected, the pod apertures 11 are corresponding with one end that the passage 7 is located at chute 6 and even
It is logical.
Damping ring 12 is provided with the annular slot 105.The latch segment 4 is provided with nylon spacer close to the side of cylinder body 1
13.The material of damping ring 12 and nylon spacer 13 is PTFE.
Above-mentioned mechanical interlocking hydraulic jack is when using, and piston rod 3 is contracted in cylinder body 1, by defeated in the second hydraulic fluid port 104
Enter hydraulic oil so that hydraulic oil is entered in the rodless cavity 102 in cylinder body 1, due to latch segment 4 the scope of operation 401 and cylinder body 1 it
Between have gap so that the active force of hydraulic oil is acted in the scope of operation 401 of latch segment 4, forces latch segment 4 in plunger 202
On chute 6 in slide and extrude the spring 5 in slideway 10, while the hydraulic oil in the bottom of chute 6 is entered by pod apertures 11
Into passage 7, hydraulic oil is entered in rod chamber 101 by passage 7 again, when latch segment 4 departs from annular slot 105, hydraulic oil
Piston 2 is promoted to be slided in cylinder body 1 so that piston rod 3 stretches out；When the first 103 oil-feed of hydraulic fluid port, piston 2 is promoted in cylinder body 1
Slide, drive piston rod 3 to be retracted in cylinder body 1, when latch segment 4 is corresponding with annular slot 105, in the active force of spring 5
Under so that the card of latch segment 4 is set in annular slot 105, and annular slot 105 is entrapped in insufficient for latch segment 4 in the power of spring 5
When, the hydraulic oil of rod chamber 101 is reached in pod apertures 11 by passage 7, then by passage 7, hydraulic oil have to latch segment 4 one to
The active force on upper top so that the card of latch segment 4 is set in annular slot 105, the damping ring 12 in annular slot 105 and latch segment 4
On nylon spacer 13 be provided to reduce latch segment 4 to the impact of cylinder body 1.
Embodiment 2
The difference of embodiment 2 and embodiment 1 is：As shown in figure 5, the scope of operation 401 is with guide function on latch segment 4
Inclined-plane, when hydraulic oil is acted on inclined-plane, a force component is simultaneously decomposed into promotion latch segment 4 to chute by inclined-plane stress
6 active forces slided, so that latch segment 4 departs from annular slot 105, another way realizes the latch segment 4 in chute 6
Slide.
The above-mentioned desirable embodiment according to the present invention is enlightenment, and by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention'.This invention it is technical
Scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (6)
1. a kind of mechanical interlocking hydraulic jack, including cylinder body (1), piston (2) and piston rod (3), the piston (2) are arranged on institute
State on piston rod (3), the piston (2) is slidably arranged in the cylinder body (1), and the cylinder body (1) is divided into spaced
The rod chamber (101) and rodless cavity (102) opened, it is characterised in that：Also include latch segment (4) and spring (5), the cylinder body (1)
Provided with the first hydraulic fluid port (103) connected with the rod chamber (101), the cylinder body (1) is provided with and the rodless cavity (102)
The second hydraulic fluid port (104) of connection, the piston (2) and the contact surface of the cylinder body (1) internal perisporium offer chute (6), described
Chute (6) matches with the latch segment (4), and the latch segment (4) is slidably arranged in the chute (6), the spring (5)
It is arranged between the latch segment (4) and the chute (6), the described one end of cylinder body (1) internal perisporium away from piston rod (3) is opened up
There is annular slot (105), the annular slot (105) matches with the latch segment (4), and the latch segment (4) is fastened on institute
State in annular slot (105), the latch segment (4) is provided with the scope of operation (401), when hydraulic oil acts on the scope of operation
(401) when, force latch segment (4) to be slided and compression spring (5) in chute (6) under the active force of hydraulic oil, and cause lock
Tight block (4) departs from annular slot (105).
2. mechanical interlocking hydraulic jack according to claim 1, it is characterised in that：Passage is offered on the piston (2)
(7), one end of the passage (7) is connected with the chute (6), and the other end and the rod chamber (101) of the passage (7) connect
It is logical.
3. mechanical interlocking hydraulic jack according to claim 2, it is characterised in that：The piston (2) includes pedestal (201)
With plunger (202), the pedestal (201) is arranged on the piston rod (3), and the plunger (202) is detachably connected on pedestal
(201) one end away from piston rod (3), the chute (6) is arranged on the plunger (202), opened up on the plunger (202)
There is first through hole (8), the first through hole (8) is connected with chute (6), and the second through hole (9) is offered on the pedestal (201),
It is interconnected between the first through hole (8) and second through hole (9) and forms passage (7).
4. mechanical interlocking hydraulic jack according to claim 2, it is characterised in that：Offered on the latch segment (4) with
The slideway (10) that spring (5) matches, the slideway (10) is set along latch segment (4) direction of displacement, and the spring (5) is arranged on
In the slideway (10), pod apertures (11) are provided with the latch segment (4), the pod apertures (11) are handed over the slideway (10)
Fork sets and is interconnected, and the pod apertures (11) are corresponding with one end that the passage (7) is located at chute (6) and connect.
5. mechanical interlocking hydraulic jack according to claim 1, it is characterised in that：It is provided with the annular slot (105)
Damping ring (12).
6. mechanical interlocking hydraulic jack according to claim 1, it is characterised in that：The latch segment (4) is close to cylinder body (1)
Side be provided with nylon spacer (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710676841.8A CN107237795A (en) | 2017-08-09 | 2017-08-09 | Mechanical interlocking hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710676841.8A CN107237795A (en) | 2017-08-09 | 2017-08-09 | Mechanical interlocking hydraulic jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107237795A true CN107237795A (en) | 2017-10-10 |
Family
ID=59988594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710676841.8A Pending CN107237795A (en) | 2017-08-09 | 2017-08-09 | Mechanical interlocking hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107237795A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109077653A (en) * | 2018-08-28 | 2018-12-25 | 庞成谦 | A kind of outside for home window glass prevents artificial cleaning device |
| CN110469559A (en) * | 2019-09-04 | 2019-11-19 | 中冶赛迪技术研究中心有限公司 | A kind of unidirectional mechanical locked hydraulic cylinder |
| CN110500335A (en) * | 2019-09-19 | 2019-11-26 | 泰安市力华液压设备有限公司 | A kind of mechanical interlocking hydraulic cylinder |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH353428A (en) * | 1957-06-04 | 1961-04-15 | Sprecher & Schuh Ag | Pressure medium-operated drive for electrical switching devices |
| DE3810183A1 (en) * | 1988-03-25 | 1989-10-05 | Kontec Gmbh | Device for locking a piston rod of a piston/cylinder arrangement |
| JP2000097209A (en) * | 1998-09-22 | 2000-04-04 | Taiyo Ltd | Brake device |
| CN201377480Y (en) * | 2009-04-13 | 2010-01-06 | 吴航 | Hydraulic cylinder locking device |
| CN201412409Y (en) * | 2009-06-17 | 2010-02-24 | 江苏恒立高压油缸有限公司 | Mechanical self-locking hydro cylinder |
| CN103043092A (en) * | 2013-01-21 | 2013-04-17 | 北京理工大学 | Hydraulic centering cylinder with mechanical lockup function |
| CN203809408U (en) * | 2014-04-30 | 2014-09-03 | 芜湖市银鸿液压件有限公司 | Oil cylinder with front lug ring and rear lug ring |
| CN207080445U (en) * | 2017-08-09 | 2018-03-09 | 江苏龙城洪力液压设备有限公司 | Mechanical interlocking hydraulic jack |
-
2017
- 2017-08-09 CN CN201710676841.8A patent/CN107237795A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH353428A (en) * | 1957-06-04 | 1961-04-15 | Sprecher & Schuh Ag | Pressure medium-operated drive for electrical switching devices |
| DE3810183A1 (en) * | 1988-03-25 | 1989-10-05 | Kontec Gmbh | Device for locking a piston rod of a piston/cylinder arrangement |
| JP2000097209A (en) * | 1998-09-22 | 2000-04-04 | Taiyo Ltd | Brake device |
| CN201377480Y (en) * | 2009-04-13 | 2010-01-06 | 吴航 | Hydraulic cylinder locking device |
| CN201412409Y (en) * | 2009-06-17 | 2010-02-24 | 江苏恒立高压油缸有限公司 | Mechanical self-locking hydro cylinder |
| CN103043092A (en) * | 2013-01-21 | 2013-04-17 | 北京理工大学 | Hydraulic centering cylinder with mechanical lockup function |
| CN203809408U (en) * | 2014-04-30 | 2014-09-03 | 芜湖市银鸿液压件有限公司 | Oil cylinder with front lug ring and rear lug ring |
| CN207080445U (en) * | 2017-08-09 | 2018-03-09 | 江苏龙城洪力液压设备有限公司 | Mechanical interlocking hydraulic jack |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109077653A (en) * | 2018-08-28 | 2018-12-25 | 庞成谦 | A kind of outside for home window glass prevents artificial cleaning device |
| CN109077653B (en) * | 2018-08-28 | 2021-06-11 | 蔡志伟 | A outside prevents artifical belt cleaning device for domestic window glass |
| CN110469559A (en) * | 2019-09-04 | 2019-11-19 | 中冶赛迪技术研究中心有限公司 | A kind of unidirectional mechanical locked hydraulic cylinder |
| CN110500335A (en) * | 2019-09-19 | 2019-11-26 | 泰安市力华液压设备有限公司 | A kind of mechanical interlocking hydraulic cylinder |
| CN110500335B (en) * | 2019-09-19 | 2024-05-10 | 泰安市力华液压设备有限公司 | Mechanical locking hydraulic cylinder |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20171010 |