CN117886250A - Piston rod locking mechanism, jack and hydraulic support - Google Patents
Piston rod locking mechanism, jack and hydraulic support Download PDFInfo
- Publication number
- CN117886250A CN117886250A CN202410297971.0A CN202410297971A CN117886250A CN 117886250 A CN117886250 A CN 117886250A CN 202410297971 A CN202410297971 A CN 202410297971A CN 117886250 A CN117886250 A CN 117886250A
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- piston rod
- piston
- locking
- jack
- proximity switch
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- 230000007246 mechanism Effects 0.000 title claims abstract description 40
- 230000006698 induction Effects 0.000 claims abstract description 23
- 230000003068 static effect Effects 0.000 claims description 12
- 239000003245 coal Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/30—Constructional features with positive brakes or locks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F2700/00—Lifting apparatus
- B66F2700/05—Hydraulic jacks
- B66F2700/055—Jacks with a single cylinder
- B66F2700/057—Pistons, e.g. telescopic; Cylinders or sealing joints; Hydraulic travel-limiting devices or shock damping
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Actuator (AREA)
Abstract
The invention relates to the technical field of jacks, in particular to a piston rod locking mechanism, a jack and a hydraulic support. The piston rod locking mechanism comprises an induction part, a proximity switch and a locking part, wherein the induction part is fixed on a piston rod of the jack; the proximity switch is arranged on the outer wall of the cylinder barrel of the jack; the proximity switch is used for detecting whether the sensing part moving along with the piston rod moves to a preset range or not; the locking part is arranged on the cylinder barrel; when the proximity switch detects that the sensing part is located in a preset range, the locking part is used for locking the piston rod so as to limit the movement of the piston rod. According to the invention, when the proximity switch detects that the sensing part moving along with the piston rod moves to a preset range, the piston rod is locked by the locking part to limit the movement of the piston rod, so that the piston rod is automatically locked on the cylinder barrel.
Description
Technical Field
The invention relates to the technical field of jacks, in particular to a piston rod locking mechanism, a jack and a hydraulic support.
Background
Because the fully mechanized mining face space is generally limited, when the top beam supports or contracts the side protection plate, the jack on the hydraulic support is easy to collide with other equipment such as a coal mining machine and the like under the hydraulic support, so that the jack is unstable in supporting the top beam or the side protection plate.
In the prior art, the telescopic length of a piston rod of the jack is generally limited in a mechanical limiting mode so as to strengthen the supporting stability of the jack. However, the common mechanical limiting mode requires a worker to manually install a mechanical limiting structure on the jack, so that the installation efficiency is low, the jack limited by the mechanical limiting mode cannot be recovered, and the adjustment of the telescopic length of the jack on the hydraulic support is not facilitated.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
Therefore, the invention provides the piston rod locking mechanism which can realize automatic locking and limiting of the piston rod on the cylinder barrel.
The invention further provides a jack comprising the piston rod locking mechanism.
The invention also provides a hydraulic support comprising the piston rod locking mechanism or the hydraulic support of the jack.
A piston rod locking mechanism according to a first aspect of the present invention comprises:
the sensing part is fixed on a piston rod of the jack;
the proximity switch is arranged on the outer wall of the cylinder barrel of the jack; the proximity switch is used for detecting whether the sensing part moving along with the piston rod moves to a preset range or not;
the locking part is arranged on the cylinder barrel; when the proximity switch detects that the sensing part is located in a preset range, the locking part is used for locking the piston rod so as to limit the movement of the piston rod.
Optionally, the induction part comprises an induction magnetic ring, and the induction magnetic ring is positioned in the cylinder barrel and sleeved on the piston rod.
Optionally, the first end of the piston rod is disposed within the cylinder and is connected to the piston assembly; the piston assembly comprises a first piston piece and a second piston piece, and the first piston piece, the induction magnetic ring and the second piston piece are sequentially sleeved on the piston rod.
Optionally, the locking part comprises an electromagnetic locker, the electromagnetic locker is connected with a guide sleeve of the jack, the electromagnetic locker is coaxially arranged with the cylinder barrel, and the first end of the piston rod penetrates through the electromagnetic locker and then stretches into the cylinder barrel; the electromagnetic locker is in a locking state and an unlocking state;
when the electromagnetic locker is in a locking state, the electromagnetic locker locks the piston rod so as to limit the piston rod to move along the axial direction of the cylinder barrel; when the electromagnetic locker is in an unlocking state, the electromagnetic locker unlocks the piston rod, so that the piston rod can move along the axial direction of the cylinder barrel.
Optionally, the number of the proximity switches is at least two, and the at least two proximity switches are distributed in the length direction of the cylinder barrel; the preset range comprises induction ranges corresponding to at least two proximity switches respectively; correspondingly, the piston rod locking mechanism further comprises:
the acquisition module is used for acquiring the target telescopic length of the piston rod;
the determining module is used for determining a target proximity switch corresponding to the target telescopic length from at least two proximity switches according to the target telescopic length;
and the locking control module is used for controlling the locking part to lock the piston rod so as to limit the movement of the piston rod when the target proximity switch detects that the sensing part is positioned in the corresponding sensing range.
Optionally, the locking control module includes:
the judging unit is used for judging whether the locking part locks the piston rod or not before the target proximity switch detects that the sensing part is positioned in the corresponding sensing range;
and the unlocking unit is used for controlling the locking part to unlock the piston rod if the locking part locks the piston rod.
Optionally, the proximity switch is detachably fixed at a preset position of the cylinder by a detachable assembly.
A jack according to a second aspect of the present invention comprises a cylinder, a piston rod, and a piston rod locking mechanism in the first aspect or in various implementations thereof.
Optionally, the piston assembly is positioned in the cylinder barrel and connected with the first end of the piston rod; the piston assembly includes:
the first piston piece is sleeved on the piston rod, a first static seal is arranged between the first piston piece and the piston rod, and the first piston seal is sleeved on the outer periphery of the first piston piece;
the second piston piece is sleeved on the piston rod, and the sensing part is positioned between the first piston piece and the second piston piece; a second static seal is arranged between the second piston piece and the piston rod, and the second piston seal and a piston guide ring are sleeved on the outer peripheral side of the second piston piece.
A hydraulic mount according to a third aspect of the invention comprises a piston rod locking mechanism as in the first aspect or in various implementations thereof, or a jack as in the second aspect or in various implementations thereof.
One of the above technical solutions has at least the following advantages or beneficial effects:
according to the piston rod locking mechanism provided by the embodiment of the invention, the sensing part is fixed on the piston rod of the jack, the proximity switch is arranged on the cylinder barrel of the jack, the locking part is arranged on the cylinder barrel, and when the proximity switch detects that the sensing part moving along with the piston rod moves to a preset range, the piston rod is locked by the locking part to limit the movement of the piston rod, so that the automatic locking and limiting of the piston rod on the cylinder barrel are realized.
The jack provided by the embodiment of the invention is provided with the piston rod locking mechanism, and the jack provided with the piston rod locking mechanism has corresponding technical effects because the piston rod locking mechanism has the technical effects.
The hydraulic support provided by the embodiment of the invention is provided with the piston rod locking mechanism or the jack, and the hydraulic support provided with the piston rod locking mechanism or the jack has corresponding technical effects because the piston rod locking mechanism and the jack have the technical effects.
Drawings
Fig. 1 shows a schematic structural view of a jack with a piston rod locking mechanism according to one embodiment of the present invention;
fig. 2 shows a schematic structural view of a jack with a piston rod locking mechanism according to another embodiment of the present invention.
Reference numerals illustrate:
1. the device comprises an induction part, 2, a proximity switch, 3, a locking part, 4, a piston rod, 5, a cylinder barrel, 6, a guide sleeve, 7, a first piston piece, 8, a second piston piece, 9, a detachable component, 10, a first static seal, 11, a first piston seal, 12, a second static seal, 13, a second piston seal, 14 and a piston guide ring.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
Because the fully mechanized coal face space is generally limited, especially the thin coal face, the equipment such as coal mining machine is nearer to the top beam of the hydraulic support, therefore, when the top beam supports or contracts the side protection plate, the jack on the hydraulic support is easy to collide with other equipment such as the coal mining machine below the hydraulic support, so that the jack is damaged, and the support of the jack to the top beam or the side protection plate is unstable.
In the prior art, in order to avoid the unstable supporting condition of the jack for supporting the top beam or the side protection plate, the telescopic length of the piston rod of the jack is generally limited by adopting a mechanical limiting mode, but the mechanical limiting mode needs manual installation of a worker, so that the installation efficiency is low, the jack limited by the mechanical limiting mode cannot be recovered, and the telescopic length of the jack on the hydraulic support is not beneficial to adjustment.
In order to solve at least one of the technical problems in the prior art or related art, the invention provides a piston rod locking mechanism, which is characterized in that a sensing part is fixed on a piston rod of a jack, a proximity switch is arranged on a cylinder barrel of the jack, a locking part is arranged on the cylinder barrel, and when the proximity switch detects that the sensing part moving along with the piston rod moves to a preset range, the piston rod is locked by the locking part to limit the movement of the piston rod, so that the automatic locking limit of the piston rod is realized.
A piston rod locking mechanism, a jack and a hydraulic mount according to some embodiments provided by the present invention are described below with reference to the accompanying drawings.
Referring to fig. 1, a locking mechanism of a piston rod of an embodiment provided by the invention is applied to locking of a piston rod of a jack, the locking mechanism comprises an induction part 1, a proximity switch 2 and a locking part 3, and the induction part 1 is fixed on a piston rod 4 of the jack; the proximity switch 2 is arranged on the outer wall of the cylinder 5 of the jack; the proximity switch 2 is used for detecting whether the sensing part 1 moving along with the piston rod 4 moves to a preset range; the locking part 3 is arranged on the cylinder 5; when the proximity switch 2 detects that the sensing portion 1 is located in the preset range, the locking portion 3 is used for locking the piston rod 4 to limit the movement of the piston rod 4.
The jack comprises a guide sleeve 6, a cylinder 5, a piston rod 4 and a piston assembly which are coaxially arranged, wherein the guide sleeve 6 is detachably connected with the cylinder 5 through bolts, the piston assembly is positioned in the cylinder 5, a first end of the piston rod 4 penetrates through the guide sleeve 6 and then is connected with the piston assembly, and the piston assembly divides an inner cavity in the cylinder 5 into a rod cavity and a rodless cavity; in order to keep the sensing portion 1 in the rod chamber under a reciprocating movement with the piston rod 4, the sensing portion 1 may be arranged here close to the first end of the piston rod 4.
Here, when the proximity switch 2 detects that the sensing portion 1 is located in the preset range, the proximity switch 2 can receive the sensing signal, and the proximity switch 2 sends the sensing signal to the locking portion 3, so that the locking portion 3 locks the piston rod 4. In addition, when the jack needs to be retracted, the locking piece can be controlled to unlock so as to unlock the locking part 3 from locking the piston rod 4.
In the present embodiment, the automatic locking and limiting of the piston rod 4 on the cylinder 5 is achieved by fixing the sensing part 1 on the piston rod 4 of the jack, providing the proximity switch 2 on the cylinder 5 of the jack, and providing the locking part 3 on the cylinder 5, and locking the piston rod 4 with the locking part 3 to limit the movement of the piston rod 4 when the proximity switch 2 detects that the sensing part 1 moving with the piston rod 4 moves to a preset range.
In some possible embodiments, the sensing part 1 comprises a sensing magnetic ring, which is located inside the cylinder 5 and is sleeved on the piston rod 4.
Here, after the induction magnetic ring is sleeved on the piston rod 4, the inner side wall of the induction magnetic ring is in contact with the piston rod 4, and the induction magnetic ring and the piston rod 4 are coaxially arranged.
In this embodiment, by sleeving the induction magnetic ring on the piston rod 4, not only is the installation of the induction magnetic ring on the piston rod 4 facilitated, but also the proximity switch 2 on any position on the outer circumferential side of the cylinder 5 corresponding to the preset length can be induced with the induction magnetic ring when the piston rod 4 is extended and contracted to the preset length, thereby facilitating the assembly of the proximity switch 2 on the cylinder 5.
Further, a first end of the piston rod 4 is arranged in the cylinder 5 and is connected with the piston assembly; the piston assembly comprises a first piston member 7 and a second piston member 8, and the first piston member 7, the induction magnetic ring and the second piston member 8 are sequentially sleeved on the piston rod 4.
In this embodiment, the induction magnetic ring is disposed between the first piston member 7 and the second piston member 8, so that the working medium in the cylinder 5 can be prevented from contacting the induction magnetic ring, and the problem that the proximity switch 2 senses the induction magnetic ring due to the working medium is reduced.
In some possible embodiments, the locking part 3 comprises an electromagnetic locker, the electromagnetic locker is connected with the guide sleeve 6 of the jack, the electromagnetic locker is coaxially arranged with the cylinder 5, and the first end of the piston rod 4 passes through the electromagnetic locker and then extends into the cylinder 5; the electromagnetic locker is in a locking state and an unlocking state; when the electromagnetic locker is in a locking state, the electromagnetic locker locks the piston rod 4 to limit the piston rod 4 to move along the axial direction of the cylinder 5; when the electromagnetic locker is in the unlocked state, the electromagnetic locker releases the locking of the piston rod 4 so that the piston rod 4 can move in the axial direction of the cylinder 5.
Here, the electromagnetic locker may be detachably connected with the guide sleeve 6 of the jack by a bolt assembly.
When the proximity switch 2 detects that the sensing portion 1 moves along with the piston rod 4 to within a preset range, the proximity switch 2 may send a locking signal to a controller of the electromagnetic locker, so that the controller controls the electromagnetic locker to perform a locking action according to the locking signal, so that the electromagnetic locker is switched from an unlocking state to a locking state, and the electromagnetic locker limits the piston rod 4 to move along the axis direction of the cylinder 5. In addition, the controller can also receive an unlocking signal sent by a worker through the client, so that the controller controls the electromagnetic locker to execute unlocking action according to the unlocking signal, the electromagnetic locker is switched from a locking state to an unlocking state, and the piston rod 4 can move along the axial direction of the cylinder 5.
In some possible embodiments, the number of the proximity switches 2 is at least two, and the at least two proximity switches 2 are distributed in the length direction of the cylinder 5; the preset range comprises induction ranges corresponding to at least two proximity switches 2 respectively; correspondingly, the piston rod locking mechanism further comprises an acquisition module, a determination module and a locking control module, wherein the acquisition module is used for acquiring the target telescopic length of the piston rod 4; the determining module is used for determining a target proximity switch corresponding to the target telescopic length in at least two proximity switches 2 according to the target telescopic length; the locking control module is used for controlling the locking part 3 to lock the piston rod 4 so as to limit the movement of the piston rod 4 when the target proximity switch detects that the sensing part 1 is positioned in the corresponding sensing range.
Here, each proximity switch 2 corresponds to a target telescopic length of the piston rod 4, for example: referring to fig. 2, two proximity switches 2 are distributed along the length direction of the cylinder 5, the two proximity switches 2 may be a proximity switch i and a proximity switch ii, respectively, and when the proximity switch i senses the sensing portion 1, the telescopic length of the piston rod 4 at this time is the target telescopic length corresponding to the proximity switch i; when the proximity switch II senses the sensing part 1, the telescopic length of the piston rod 4 at the moment is the target telescopic length corresponding to the proximity switch II. The setting position of the at least two proximity switches 2 can be determined according to the preset telescopic length of the piston rod 4 required by the staff.
In order to provide the piston rod 4 with at least two target telescopic lengths relative to the cylinder 5, at least two proximity switches 2 are arranged in a distributed manner along the length direction of the cylinder 5, so that the piston rod 4 can be locked by the locking part 3 when the piston rod 4 is in different target telescopic lengths.
It should be noted that, the target telescopic length may be set by a worker through the client and then sent to the acquisition module, when the determination module receives the target telescopic length sent by the acquisition module, the determination module determines that the telescopic length of the piston rod 4 is the target telescopic length according to the target telescopic length, the length of the cylinder 5, the length of the piston rod 4, and the setting position of the sensing portion 1 on the piston rod 4, and when the telescopic length of the piston rod 4 is the target telescopic length, the target position of the proximity switch 2 of the sensing portion 1 on the cylinder 5 can be sensed, and then the target proximity switch corresponding to the target telescopic length is determined from at least two proximity switches 2 according to the target position; when the target proximity switch detects that the sensing part 1 is located in the corresponding sensing range, the locking control module controls the locking part 3 to lock the piston rod 4 so as to limit the movement of the piston rod 4, so that the piston rod 4 under the target telescopic length is axially locked on the cylinder 5.
Further, the locking control module comprises a judging unit and an unlocking unit, wherein the judging unit is used for judging whether the locking part 3 locks the piston rod 4 before the target proximity switch detects that the sensing part 1 is positioned in the corresponding sensing range; the unlocking unit is used for controlling the locking part 3 to unlock the piston rod 4 if the locking part 3 locks the piston rod 4.
In this embodiment, before the target proximity switch detects that the sensing portion 1 is located in the sensing range corresponding to the target proximity switch, the determining unit determines whether the locking portion 3 locks the piston rod 4; when the locking part 3 is judged to lock the piston rod 4, the unlocking unit controls the locking part 3 to unlock the piston rod 4, so that the piston rod 4 can move along the axial direction of the cylinder 5 until the sensing part 1 moves along with the piston rod 4 to the sensing range of the target proximity switch, and then the locking control module controls the locking part 3 to lock the piston rod 4, so that the locking part 3 locks the piston rod 4 with target telescopic lengths corresponding to different proximity switches 2.
In some possible embodiments, the proximity switch 2 is removably fixed in a predetermined position of the cylinder 5 by means of a removable assembly 9.
Here, the detachable component 9 may be a throat hoop, which is sleeved on the cylinder 5, and which hoops the proximity switch 2 at a predetermined position of the cylinder 5.
In this embodiment, the proximity switch 2 is fixed at the preset position of the cylinder 5 by the detachable component 9, so that the connection flexibility of the proximity switch 2 and the cylinder 5 can be improved, the disassembly of the proximity switch 2 on the cylinder 5 is facilitated, and the assembly and the maintenance of the proximity switch 2 are facilitated.
The invention provides a jack of one embodiment, which comprises a cylinder 5, a piston rod 4 and a piston rod locking mechanism in any embodiment.
Here, the jack may be a push jack.
The jack of the present embodiment includes any one of the piston rod locking mechanisms of the first aspect, so that the jack has the beneficial effects of any one of the embodiments described above, and will not be described herein.
In some possible embodiments, the jack further comprises a piston assembly located within the cylinder 5 and connected to the first end of the piston rod 4; the piston assembly comprises a first piston member 7 and a second piston member 8, the first piston member 7 is sleeved on the piston rod 4, a first static seal 10 is arranged between the first piston member 7 and the piston rod 4, and a first piston seal 11 is sleeved on the outer periphery of the first piston member 7; the second piston member 8 is sleeved on the piston rod 4, and the sensing part 1 is positioned between the first piston member 7 and the second piston member 8; a second static seal 12 is arranged between the second piston member 8 and the piston rod 4, and a second piston seal 13 and a piston guide ring 14 are sleeved on the outer periphery side of the second piston member 8.
The second piston member 8 is disposed near the first end of the piston rod 4, and the first piston member 7 is disposed near the side of the second piston member 8 away from the first end of the piston rod 4. The arrangement of the first static seal 10 and the first piston seal 11 can realize the sealing of the rod cavity through the matching of the first static seal 10 and the first piston seal 11 so as to prevent the working medium in the rod cavity from flowing into the rodless cavity; the arrangement of the second static seal 12 and the second piston seal 13 can realize the sealing of the rodless chamber through the cooperation of the second static seal 12 and the second piston seal 13 so as to prevent the working medium in the rodless chamber from flowing into the rod-containing chamber.
Here, the piston guide ring 14 is assembled to the second piston member 8 such that the piston guide ring 14 plays a role of guiding and supporting between the second piston member 8 and the inner wall of the cylinder 5, and thus the second piston member 8 smoothly moves along the inner wall of the cylinder 5 by the piston guide ring 14.
The hydraulic support according to one embodiment of the present invention includes a piston rod locking mechanism as in any of the above embodiments, or a jack as in any of the above embodiments.
The hydraulic support of the present embodiment includes any one of the piston rod locking mechanism of the first aspect or any one of the jack of the second aspect, so that the hydraulic support has the beneficial effects of any one of the embodiments described above, and will not be described herein.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.
In the description of the present specification, the terms "one embodiment," "some embodiments," "example embodiments," "examples," "specific examples," or "some examples," etc., refer to a particular feature, structure, material, or characteristic described in connection with the embodiment or example as being included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the invention.
Claims (10)
1. A piston rod locking mechanism comprising:
the sensing part is fixed on a piston rod of the jack;
the proximity switch is arranged on the outer wall of the cylinder barrel of the jack; the proximity switch is used for detecting whether the sensing part moving along with the piston rod moves to a preset range or not;
the locking part is arranged on the cylinder barrel; when the proximity switch detects that the sensing part is located in the preset range, the locking part is used for locking the piston rod so as to limit the movement of the piston rod.
2. The piston rod locking mechanism of claim 1 wherein said sensing portion comprises a sensing magnet ring positioned within said cylinder and sleeved on said piston rod.
3. The piston rod locking mechanism of claim 2 wherein the first end of the piston rod is disposed within the cylinder barrel and is connected to a piston assembly; the piston assembly comprises a first piston piece and a second piston piece, and the first piston piece, the induction magnetic ring and the second piston piece are sequentially sleeved on the piston rod.
4. The piston rod locking mechanism according to claim 1, wherein the locking portion comprises an electromagnetic locker, the electromagnetic locker is connected with a guide sleeve of the jack, the electromagnetic locker is coaxially arranged with the cylinder barrel, and a first end of the piston rod penetrates through the electromagnetic locker and then stretches into the cylinder barrel; the electromagnetic lock has a locking state and an unlocking state;
when the electromagnetic locker is in the locking state, the electromagnetic locker locks the piston rod to limit the piston rod to move along the axial direction of the cylinder barrel; when the electromagnetic locker is in the unlocking state, the electromagnetic locker unlocks the piston rod so that the piston rod can move along the axial direction of the cylinder barrel.
5. The piston rod locking mechanism according to claim 1, wherein the number of the proximity switches is at least two, and the at least two proximity switches are distributed in the length direction of the cylinder; the preset range comprises induction ranges corresponding to at least two proximity switches respectively; correspondingly, the piston rod locking mechanism further comprises:
the acquisition module is used for acquiring the target telescopic length of the piston rod;
the determining module is used for determining a target proximity switch corresponding to the target telescopic length from at least two proximity switches according to the target telescopic length;
and the locking control module is used for controlling the locking part to lock the piston rod so as to limit the movement of the piston rod when the target proximity switch detects that the sensing part is positioned in the corresponding sensing range.
6. The piston rod locking mechanism of claim 5, wherein the locking control module comprises:
the judging unit is used for judging whether the locking part locks the piston rod or not before the target proximity switch detects that the sensing part is positioned in the corresponding sensing range;
and the unlocking unit is used for controlling the locking part to unlock the piston rod if the locking part locks the piston rod.
7. A piston rod locking mechanism according to any one of claims 1 to 6, wherein the proximity switch is detachably secured in a predetermined position of the cylinder barrel by a detachable assembly.
8. A jack comprising a cylinder, a piston rod, and a piston rod locking mechanism as claimed in any one of claims 1 to 7.
9. The jack of claim 8, further comprising a piston assembly located within the cylinder and connected to the first end of the piston rod; the piston assembly includes:
the first piston piece is sleeved on the piston rod, a first static seal is arranged between the first piston piece and the piston rod, and a first piston seal is sleeved on the outer periphery side of the first piston piece;
the second piston piece is sleeved on the piston rod, and the sensing part is positioned between the first piston piece and the second piston piece; a second static seal is arranged between the second piston piece and the piston rod, and a second piston seal and a piston guide ring are sleeved on the outer periphery side of the second piston piece.
10. A hydraulic mount comprising a piston rod locking mechanism as claimed in any one of claims 1 to 7 or a jack as claimed in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410297971.0A CN117886250A (en) | 2024-03-15 | 2024-03-15 | Piston rod locking mechanism, jack and hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410297971.0A CN117886250A (en) | 2024-03-15 | 2024-03-15 | Piston rod locking mechanism, jack and hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117886250A true CN117886250A (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410297971.0A Pending CN117886250A (en) | 2024-03-15 | 2024-03-15 | Piston rod locking mechanism, jack and hydraulic support |
Country Status (1)
| Country | Link |
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| CN (1) | CN117886250A (en) |
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| CN202560694U (en) * | 2012-05-02 | 2012-11-28 | 烟台未来自动装备有限责任公司 | Hydraulic cylinder with non high-pressure-resistant approximate switch |
| CN202746321U (en) * | 2012-09-11 | 2013-02-20 | 中联重科股份有限公司 | Oil cylinder assembly and concrete pumping equipment |
| CN104632787A (en) * | 2015-02-12 | 2015-05-20 | 中航飞机起落架有限责任公司 | Self-checking mechanism for lock state of internal mechanical lock of actuating cylinder |
| CN106015170A (en) * | 2016-07-18 | 2016-10-12 | 中车戚墅堰机车车辆工艺研究所有限公司 | Mechanical automatic locking cylinder |
| US20170335866A1 (en) * | 2016-05-19 | 2017-11-23 | China Pneumatic Corporation | Apparatus and control system of programmable air servo motor |
| CN210371455U (en) * | 2019-07-15 | 2020-04-21 | 河南能源化工集团重型装备有限公司 | Protection structure of built-in stroke sensor of pushing oil cylinder |
| CN210919628U (en) * | 2019-09-27 | 2020-07-03 | 深圳市迈斯艾尔科技发展有限公司 | Self-locking air cylinder |
| CN111379759A (en) * | 2018-12-28 | 2020-07-07 | 徐州徐工液压件有限公司 | Hydraulic oil cylinder assembly and crane |
| CN214879732U (en) * | 2021-03-25 | 2021-11-26 | 安徽柳工起重机有限公司 | Crane boom and automobile crane |
| CN217783899U (en) * | 2022-06-27 | 2022-11-11 | 三和油缸(常州)有限公司 | Proximity switch die-casting oil cylinder |
| CN116085351A (en) * | 2023-02-20 | 2023-05-09 | 中国船舶重工集团公司第七0七研究所九江分部 | Mechanical automatic locking hydraulic cylinder |
-
2024
- 2024-03-15 CN CN202410297971.0A patent/CN117886250A/en active Pending
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| GB1586621A (en) * | 1977-02-16 | 1981-03-25 | Ruthmann Maschf Anton | Piston and cylinder device with lockable piston |
| CN202560694U (en) * | 2012-05-02 | 2012-11-28 | 烟台未来自动装备有限责任公司 | Hydraulic cylinder with non high-pressure-resistant approximate switch |
| CN202746321U (en) * | 2012-09-11 | 2013-02-20 | 中联重科股份有限公司 | Oil cylinder assembly and concrete pumping equipment |
| CN104632787A (en) * | 2015-02-12 | 2015-05-20 | 中航飞机起落架有限责任公司 | Self-checking mechanism for lock state of internal mechanical lock of actuating cylinder |
| US20170335866A1 (en) * | 2016-05-19 | 2017-11-23 | China Pneumatic Corporation | Apparatus and control system of programmable air servo motor |
| CN106015170A (en) * | 2016-07-18 | 2016-10-12 | 中车戚墅堰机车车辆工艺研究所有限公司 | Mechanical automatic locking cylinder |
| CN111379759A (en) * | 2018-12-28 | 2020-07-07 | 徐州徐工液压件有限公司 | Hydraulic oil cylinder assembly and crane |
| CN210371455U (en) * | 2019-07-15 | 2020-04-21 | 河南能源化工集团重型装备有限公司 | Protection structure of built-in stroke sensor of pushing oil cylinder |
| CN210919628U (en) * | 2019-09-27 | 2020-07-03 | 深圳市迈斯艾尔科技发展有限公司 | Self-locking air cylinder |
| CN214879732U (en) * | 2021-03-25 | 2021-11-26 | 安徽柳工起重机有限公司 | Crane boom and automobile crane |
| CN217783899U (en) * | 2022-06-27 | 2022-11-11 | 三和油缸(常州)有限公司 | Proximity switch die-casting oil cylinder |
| CN116085351A (en) * | 2023-02-20 | 2023-05-09 | 中国船舶重工集团公司第七0七研究所九江分部 | Mechanical automatic locking hydraulic cylinder |
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