CN111943074A

CN111943074A - Follow-up self-locking jack

Info

Publication number: CN111943074A
Application number: CN202010789717.4A
Authority: CN
Inventors: 汤婷; 钱光勇; 嵇鹏
Original assignee: Jiangsu Wanchuan Hydraulic Machinery Equipment Co ltd
Current assignee: Jiangsu Wanchuan Hydraulic Machinery Equipment Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2020-11-17

Abstract

The application discloses follow-up auto-lock jack includes: the jacking system is used for moving in the horizontal or vertical direction, the servo self-locking mechanism is movably connected with the jacking system, and the hydraulic resetting mechanism is used for communicating the oil passages of the jacking system and the servo self-locking mechanism. The servo self-locking mechanism keeps the locking trend of the jacking system in the process of vertically moving, jacking and adjusting the jacking system, and vertically moving, jacking and adjusting the jacking system are completed to immediately lock the jacking system. The control mode of the servo self-locking mechanism is simple and easy to control, the effectiveness is strong, the safety is high, the double-acting hydraulic reset is realized, and the installation space can be saved; the hydraulic reset mechanism in this application makes jacking system and follow-up self-locking mechanism's oil circuit intercommunication set up to make whole control process automation degree higher, do not need artificial intervention.

Description

Follow-up self-locking jack

Technical Field

The application belongs to the technical field of jacks, and particularly relates to a follow-up self-locking jack.

Background

The existing three-dimensional jack is usually provided with a safety valve, a balance valve, a hydraulic lock, a piston rod and a nut for preventing retreat, a ratchet lock is arranged on the piston rod of the jack in an extending manner, and the like for locking to carry out safety protection, so that accidents caused by weight falling are prevented. However, it also has the following problems:

the hydraulic valves such as a safety valve, a balance valve and a hydraulic lock are configured to perform safety protection to prevent heavy objects from falling, the safety protection is performed completely by the hydraulic valves, zero leakage cannot be realized by the conventional hydraulic valves, so that the hydraulic valves cannot be locked for a long time effectively, and the safety protection is lost after hydraulic pipelines of the hydraulic valves break down or are damaged.

The piston rod and the nut are prevented from moving back, namely, an external thread structure is processed on the surface of a main oil cylinder piston rod, and the nut is matched to manually adjust the position of the nut, so that the nut is in contact with and props against a main oil cylinder body to prevent moving back and locking. In the mode, after the main oil cylinder is jacked to a required position, the position of a nut needs to be manually adjusted or controlled by a motor, a motor and the like to enable the nut to contact and jack the cylinder body of the main oil cylinder; when the main oil cylinder retracts, the nut can retract only by manually adjusting the position of the nut or controlling a motor, a motor and the like to be far away from the main oil cylinder body; or the mode of controlling the motor and the motor is to start the motor or the motor after the main oil cylinder stops running, follow-up self-locking cannot be achieved in the running process, and an operator is unsafe under a heavy object when the position of the nut is manually adjusted.

Modes such as piston rod and nut are prevented moving back need set up the screw thread with the locking of cooperation nut in the extension on the jack piston rod, need the elongated part be greater than effective stroke, and jack body height is with greatly increased like this, leans on equipment and load gravity to reset or spring to reset, and the defect that can't appear resetting to the stroke end in this kind of mode use easily influences effective jacking height.

The mode of locking by arranging the ratchet on the piston rod of the jack in an extending way needs the lengthened part to be larger than the effective stroke, so that the height of the jack body is greatly increased, and the jack cannot be used in some application occasions, particularly when the installation space of a working condition site for displacement operation of ship welding, railways, roads, bridges or similar beam type heavy objects is small.

Disclosure of Invention

In view of the above-mentioned shortcomings or drawbacks of the prior art, the present application provides a follow-up self-locking jack.

In order to solve the technical problem, the application is realized by the following technical scheme:

the application provides follow-up auto-lock jack includes: the jacking system is used for moving in the horizontal or vertical direction, the servo self-locking mechanism is movably connected with the jacking system, and the hydraulic resetting mechanism is used for communicating the oil passages of the jacking system and the servo self-locking mechanism.

Further, above-mentioned follow-up auto-lock jack, wherein, jacking system includes: the first cylinder barrel, a first piston rod, a first guide sleeve, a first piston, a stopping rod and an oil cylinder head, wherein the stopping rod is slidably sleeved in an inner hole of the first cylinder barrel, the first piston is slidably sleeved in the inner hole of the stopping rod and is installed at the first end of the first piston rod, the second end of the first piston rod is fixedly installed at the bottom end of the first cylinder barrel, the first guide sleeve is installed in the inner hole at the lower end of the stopping rod and is slidably sleeved on the first piston rod, and the oil cylinder head is installed in the inner hole at the upper end of the stopping rod; the first cylinder barrel is also movably connected with the follow-up self-locking mechanism.

Further, in the servo self-locking jack, the first cylinder barrel is further provided with a first oil port and a second oil port.

Further, above-mentioned follow-up auto-lock jack, wherein, jacking system still includes: the pushing body is used for pushing a workpiece and arranged on the oil cylinder head.

Further, in the above follow-up self-locking jack, the follow-up self-locking mechanism includes: the stopping ring is arranged on the first cylinder and is movably connected with the stopping rod, the second piston rod is slidably sleeved in an inner hole of the second cylinder, the second piston rod is fixedly connected with the stopping ring, and the second cylinder is detachably connected with the first cylinder; the disc spring is sleeved on the second piston rod, one end of the disc spring is in contact with the retaining ring, and the second end of the disc spring is in contact with the second cylinder barrel.

Further, in the servo self-locking jack, a tightening nut and a cap are further arranged on the second cylinder barrel.

Further, in the servo self-locking jack, a third oil port is further formed in the second cylinder.

Further, in the servo self-locking jack, the hydraulic reset mechanism connects the third oil port of the jacking system with the first oil port of the servo self-locking mechanism, and under the action of the hydraulic reset mechanism, the servo self-locking mechanism overcomes the compression force of the disc spring and releases the locking of the servo self-locking mechanism on the jacking system.

Further, in the servo self-locking jack, the backstop ring is provided with a first ratchet, the backstop rod is provided with a second ratchet, and the first ratchet and the second ratchet are arranged in a matching manner.

Further, in the following self-locking jack, the first ratchet or the second ratchet comprises a plurality of continuous unidirectional oblique tooth surfaces.

Compared with the prior art, the method has the following technical effects:

the servo self-locking mechanism keeps the locking trend of the jacking system in the process of vertically moving, jacking and adjusting the jacking system, and vertically moving, jacking and adjusting the jacking system are completed to immediately lock the jacking system. The control mode of the servo self-locking mechanism is simple and easy to control, the effectiveness is strong, the safety is high, the double-acting hydraulic reset is realized, and the installation space can be saved;

the hydraulic reset mechanism in this application makes jacking system and follow-up self-locking mechanism's oil circuit intercommunication set up to make whole control process automation degree higher, do not need artificial intervention.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1: the application relates to a three-dimensional view of a follow-up self-locking jack;

FIG. 2: a plan view of the servo self-locking jack of the application;

FIG. 3: the follow-up self-locking jack is in a sectional view along C-C;

FIG. 4: the section view of the follow-up self-locking jack along E-E is provided;

FIG. 5: as shown in the enlarged view of a portion of the structure shown in fig. 3.

Detailed Description

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

In the description of the present application, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 5, in one embodiment of the present application, a follow-up self-locking jack includes: the jacking system Z is used for moving in the horizontal or vertical direction, the servo self-locking mechanism is movably connected with the jacking system Z, and the hydraulic resetting mechanism is used for communicating the jacking system Z with an oil way of the servo self-locking mechanism. The control mode of the servo self-locking mechanism is simple and easy to control, the effectiveness is strong, the safety is high, the double-acting hydraulic reset is realized, and the installation space can be saved; the hydraulic reset mechanism in the embodiment enables the jacking system to be communicated with the oil way of the follow-up self-locking mechanism, so that the automation degree of the whole control process is higher, and manual intervention is not needed.

The jacking system Z comprises: the cylinder comprises a first cylinder barrel 13, a first piston rod 15, a first guide sleeve 16, a first piston 18, a stopping rod 17 and an oil cylinder head 20, wherein the stopping rod 17 is slidably sleeved in an inner hole of the first cylinder barrel 13, the first piston 18 is slidably sleeved in the inner hole of the stopping rod 17 and is installed at the first end of the first piston rod 15, the second end of the first piston rod 15 is fixedly installed at the bottom end of the first cylinder barrel 13, the first guide sleeve 16 is installed in an inner hole at the lower end of the stopping rod 17 and is slidably sleeved on the first piston rod 15, and the oil cylinder head 20 is installed in an inner hole at the upper end of the stopping rod 17; the first cylinder barrel 13 is also movably connected with the follow-up self-locking mechanism. And the follow-up self-locking mechanism keeps the trend of locking the jacking system Z in the process of lifting and adjusting the jacking system Z up and down, and the follow-up self-locking mechanism locks the jacking system Z immediately after the lifting and adjusting of the jacking system Z up and down are completed.

Further, the first cylinder 13 is further provided with a first oil port (rodless cavity oil port) CB and a second oil port (rod cavity oil port) CA.

Further, the lower end of the first piston rod 15 is fixedly mounted on the lower end of the first cylinder 13 and fixed by a first split nut 14.

Jacking system Z still includes: the pushing body 21 is used for pushing a workpiece, and the pushing body 21 is arranged on the cylinder head 20 of the oil cylinder.

As shown in fig. 3 and 5, the following self-locking mechanism includes: the check ring 22 is arranged on the first cylinder barrel 13 and is movably connected with the check rod 17, the second piston rod 24 is slidably sleeved in an inner hole of the second cylinder barrel 25, the second piston rod 24 is fixedly connected with the check ring 22, and further, the second piston rod 24 can be fixedly connected with the check ring 22 in a mode of pin shaft screws and the like; the second cylinder 25 is detachably connected with the first cylinder 13, and further, the second cylinder 25 can be screwed on the first cylinder 13 through internal and external threads; the disc spring 23 is sleeved on the second piston rod 24, one end of the disc spring 23 is in contact with the retaining ring 22, and the second end of the disc spring 23 is in contact with the second cylinder 25.

Further, a cap 26 is further disposed on the second cylinder 13, and the cap 26 is screwed on the second cylinder 13.

Further, a third oil port YA is further disposed on the second cylinder 13.

Further, the follow-up self-locking mechanism further comprises: and the retaining ring cover plate 19 is arranged on the step of the inner hole at the upper end of the third cylinder barrel 13.

The hydraulic reset mechanism is used for communicating the third oil port YA in the jacking system Z with the first oil port CB of the servo self-locking mechanism, and under the action of the hydraulic reset mechanism, the servo self-locking mechanism overcomes the compression force of the disc spring 23 and releases the locking of the servo self-locking mechanism on the jacking system Z.

Furthermore, a first ratchet 201 is arranged on the retaining ring 22, a second ratchet 202 is arranged on the retaining rod 17, and the first ratchet 201 and the second ratchet 202 are arranged in a matching manner.

Further, the first ratchet 201 or the second ratchet 202 includes several continuous segments of unidirectional sloped teeth surfaces.

In this embodiment, the initial compression force of the disc spring 23 is adjusted by adjusting the depth of the second cylinder 25 screwed into the outer circle of the step at the upper end of the first cylinder 13, so as to adjust the pre-tightening force of the disc spring 23 on the retaining ring 22, and further control the locking force of the retaining ring 22 on the retaining rod 17; after the screwing depth of the second cylinder 25 is adjusted, a second clamping nut 27 is screwed to prevent the second cylinder 25 from loosening to influence the pretightening force; the cap 26 can be screwed on the second cylinder 25 to serve as a rear cover of the second cylinder 25, so as to prevent the second piston rod 24 from being separated from the retaining ring 22 due to the loose joint between the second piston rod 24 and the retaining ring 22.

Further, in this embodiment, as shown in fig. 1 and fig. 2, a vertical moving system Y and/or a horizontal moving system X may be further provided, the vertical moving system Y is connected to the horizontal moving system X and drives the horizontal moving system X to move vertically, the horizontal moving system X is further connected to the jacking system Z and drives the jacking system Z to move horizontally, and the jacking system Z is used for moving in a vertical direction; the follow-up self-locking mechanism is movably connected with the jacking system Z, and locks or unlocks the jacking system Z.

In the embodiment, the workpiece can be adjusted in the horizontal transverse direction, the longitudinal direction and the vertical direction through the longitudinal moving system Y, the transverse moving system X and the jacking system Z so as to meet the displacement operation of hull welding, railways, roads, bridges or similar beam type weights; the follow-up self-locking mechanism keeps the locking trend of the jacking system Z in the process of up-and-down moving jacking adjustment of the jacking system Z, and immediately locks the jacking system Z after up-and-down moving jacking adjustment of the jacking system Z is completed. The control mode of the follow-up self-locking mechanism is simple and easy to control, high in effectiveness and high in safety.

As shown in fig. 3, the longitudinal moving system Y includes: the third cylinder barrel 1 is fixedly arranged on the third box body 6, a first end of the third piston rod 2 is sleeved in the third cylinder barrel 1 in a sliding mode, a second end of the third piston rod 2 is fixedly arranged in the transverse moving system X, and the third guide sleeve 4 is arranged in the third cylinder barrel 1 and sleeved at the first end of the third piston rod 2 in a sliding mode; the third cylinder 1 is also provided with a fourth oil port ZB (rodless chamber oil port) and a fifth oil port ZA (rod chamber oil port). The third cylinder 1 is fixedly mounted on the third box 6 and adjusts the workpiece by the longitudinal back-and-forth movement of the third piston rod 2.

Further, the third cylinder 1 is installed on a third box 6 and fixed by a third split nut 3, and the third piston rod 2 is connected with a fourth box 12 in the traverse system X through a first pin 5.

Specifically, the fourth oil port ZB is supplied with oil, the third piston rod 2 extends outwards to push the fourth box body 12 in the traversing system X described below to move in the longitudinal positive direction, and the hydraulic oil in the rod cavity of the third oil cylinder is discharged back to the oil tank through the fifth oil port ZA. And oil is supplied to the fifth oil port ZA, the third piston rod 2 retracts inwards, the fourth box body 12 in the transverse moving system X to be described later is pulled to move towards the longitudinal negative direction, and the hydraulic oil in the rodless cavity of the third oil cylinder is discharged back to the oil tank through the fourth oil port ZB.

As shown in fig. 4, the traverse system X includes: the lifting device comprises a fourth cylinder 7, a fourth piston rod 8, a fourth guide sleeve 10 and a fourth box body 12, wherein the fourth cylinder 7 is fixedly arranged on the fourth box body 12, a first end of the fourth piston rod 8 is slidably sleeved in the fourth cylinder 7, a second end of the fourth piston rod 8 is fixedly arranged on the lifting system Z, and the fourth guide sleeve 10 is arranged in the fourth cylinder 7 and slidably sleeved at a second end of the fourth piston rod 8; the fourth cylinder 7 is further provided with a sixth oil port HB (rodless cavity oil port) and a seventh oil port HA (rod cavity oil port). The fourth cylinder 7 is fixedly mounted on the fourth housing 12 and adjusts the workpiece by the transverse back-and-forth movement of the fourth piston rod 8.

Further, in this embodiment, the fourth cylinder 7 is mounted on the fourth box 12 and fixed by the fourth split nut 9, and the fourth piston rod 8 is connected to a first cylinder 13 in a jacking system Z described below by a second pin 11.

Specifically, the sixth oil port HB supplies oil, the fourth piston rod 8 extends outwards, the first cylinder barrel 13 in the jacking system Z described below is pushed to move in the positive direction of the transverse direction, and hydraulic oil in the rod cavity of the fourth oil cylinder is discharged back to the oil tank through the seventh oil port HA. And supplying oil to the seventh oil port HA, retracting the fourth piston rod 8 inwards, pulling the first cylinder barrel 13 in the jacking system Z to move in the transverse negative direction, and discharging the hydraulic oil in the rodless cavity of the fourth oil cylinder back to the oil tank through the sixth oil port HB.

The working principle of the embodiment is as follows:

supplying oil to a third oil port YA, allowing hydraulic oil to enter a rod cavity of the second oil cylinder through an oil passage 106, enabling a second piston rod 24 to retract by overcoming the compression force of a disc spring 23, and pulling the retaining ring 22 to be separated outwards to separate a first ratchet 201 of the retaining ring 22 from a second ratchet 202 of the retaining rod 17 to release the locking state; the oil supply to the third oil port YA is stopped, the second piston rod 24 extends out under the compression force of the disc spring 23, the hydraulic oil in the rod cavity of the second oil cylinder is discharged to the third oil port YA through the oil passage 106, and the retaining ring 22 is inwardly combined under the compression force of the disc spring 23 to enable the first ratchet 201 of the retaining ring 22 and the second ratchet 202 of the retaining rod 17 to be meshed and kept in a locking state.

And supplying oil to a first oil port CB in the jacking system, wherein the pressure oil reaches the rodless cavity of the first oil cylinder through an oil duct 100 and reaches the rodless cavity of the reaction boosting oil cylinder through an oil duct 101 and an oil duct 102, and a piston rod of the first oil cylinder, namely the backstop rod 17, extends upwards under the pressure action of the hydraulic oil. If the second oil port CA and the third oil port YA are directly connected in parallel through the hydraulic reset mechanism, at this time, if the oil return back pressure is greater than the opening pressure of the hydraulic reset mechanism, the oil return back pressure hydraulic oil enters the rod cavity of the second oil cylinder through the oil duct 106, the second piston rod 24 retracts against the compression force of the disc spring 23, and the stopping ring 22 is pulled to be separated outwards to separate the first ratchet 201 of the stopping ring 22 from the second ratchet 202 of the stopping rod 17 so as to release the locking state; at this time, if the return oil back pressure is not greater than the opening pressure of the hydraulic reset mechanism, the check ring 22 is inwardly combined under the compression force of the disc spring 23 to mesh the first ratchet 201 of the check ring 22 with the second ratchet 202 of the check ring 17 in the process of extending the first cylinder piston rod, namely the check rod 17, and the second ratchet 202 continuously separates the check ring 22 to the outside against the compression force of the disc spring 23 to release the locked state because the second ratchet 202 of the check ring 17 and the first ratchet 201 of the check ring 22 are the one-way inclined tooth surfaces each other in the process of extending the first cylinder piston rod, namely the check rod 17. The hydraulic oil in the rod cavity of the reaction boosting oil cylinder is discharged back to the oil tank through the second oil port CA via the oil passage 103, the oil passage 104 and the oil passage 105. The oil supply to the first oil port CB is stopped, the second piston rod 24 extends out under the compression force of the disc spring 23, the hydraulic oil in the rod cavity of the second oil cylinder is discharged back to the oil tank through the oil passage 106 through the third oil port YA, and the retaining ring 22 is inwardly combined under the compression force of the disc spring 23 to enable the first ratchet 201 of the retaining ring 22 and the second ratchet 202 of the retaining rod 17 to be meshed and kept in a locking state.

When the second port CA and the third port YA in the above technical solution do not adopt a through parallel connection method: and oil is supplied to the first oil port CB, the pressure oil reaches the rodless cavity of the first oil cylinder through the oil duct 100 and reaches the rodless cavity of the reaction boosting oil cylinder through the oil duct 101 and the oil duct 102, and the piston rod of the first oil cylinder, namely the backstop rod 17, extends upwards under the action of the pressure of the hydraulic oil. At this time, if oil is supplied to the third oil port YA, the hydraulic oil enters the second cylinder rod cavity through the oil passage 106, the second piston rod 24 retracts against the compression force of the disc spring 23, and the retaining ring 22 is pulled to be separated outwards, so that the first ratchet 201 of the retaining ring 22 and the second ratchet 202 of the retaining rod 17 are separated to release the locking state. If the oil is not supplied to the third oil port YA, the retaining ring 22 is inwardly combined under the compression force of the disc spring 23 to enable the first ratchet 201 of the retaining ring 22 to be meshed with the second ratchet 202 of the retaining ring 17 in the process that the first cylinder piston rod, namely the retaining rod 17, extends out, and the second ratchet 202 continuously enables the retaining ring 22 to overcome the compression force of the disc spring 23 to be outwardly separated to release the locking state in the process that the second ratchet 202 of the retaining ring 17 and the first ratchet 201 of the retaining ring 22 are mutually of one-way inclined tooth surfaces. The hydraulic oil in the rod cavity of the reaction boosting oil cylinder is discharged back to the oil tank through the second oil port CA via the oil passage 103, the oil passage 104 and the oil passage 105. The oil supply to the third oil port YA is stopped, the second piston rod 24 extends out under the compression force of the disc spring 23, the hydraulic oil in the rod cavity of the second oil cylinder is discharged back to the oil tank through the oil duct 106 through the third oil port YA, and the retaining ring 22 is inwardly combined under the compression force of the disc spring 23 to enable the first ratchet 201 of the retaining ring 22 and the second ratchet 202 of the retaining rod 17 to be meshed and kept in a locking state.

The oil is supplied to a second oil port CA, the pressure oil reaches the rod cavity of the reaction boosting oil cylinder through an oil duct 105, an oil duct 104 and an oil duct 103, and the second oil port CA and a third oil port YA are directly connected in parallel; at the moment, because the volume of a rod cavity of the reaction force-increasing oil cylinder is smaller than the sum of the volume of a rodless cavity of the reaction force-increasing oil cylinder and the volume of a rodless cavity of the first oil cylinder, hydraulic oil in the rodless cavity of the first oil cylinder cannot be discharged back to the oil tank to generate back pressure, and a piston rod of the first oil cylinder, namely the backstop rod 17, does not retract; when the pressure of the rod cavity of the first oil cylinder is higher than the starting pressure of the hydraulic reset mechanism, hydraulic oil enters the rod cavity of the second oil cylinder through the oil duct 106, the second piston rod 24 retracts against the compression force of the disc spring 23, and the stopping ring 22 is pulled to be separated outwards to separate the first ratchet 201 of the stopping ring 22 from the second ratchet 202 of the stopping rod 17 so as to release the locking state; the first cylinder piston rod, i.e., the backstop rod 17, retracts downward under the pressure of the hydraulic oil. The hydraulic oil in the rodless cavity of the reaction boosting oil cylinder flows through the oil passage 102 and the oil passage 101, and the hydraulic oil in the rodless cavity of the first oil cylinder flows together and is discharged back to the oil tank through the oil passage 100 and the first oil port CB.

In the above technical scheme, if the second oil port CA and the third oil port YA are not connected in parallel, oil is supplied to the third oil port YA, hydraulic oil enters the rod cavity of the second oil cylinder through the oil passage 106, the second piston rod 24 retracts against the compression force of the disc spring 23, and the retaining ring 22 is pulled to be separated outwards to separate the first ratchet 201 of the retaining ring 22 from the second ratchet 202 of the retaining rod 17, so that the locking state is released; then, oil is supplied to the second oil port CA, the pressure oil reaches the rod cavity of the reaction boosting cylinder through the oil passage 105, the oil passage 104 and the oil passage 103, and the piston rod of the first cylinder, namely the backstop rod 17, retracts downwards under the pressure of the hydraulic oil. The hydraulic oil in the rodless cavity of the reaction boosting oil cylinder flows through the oil passage 102 and the oil passage 101, and the hydraulic oil in the rodless cavity of the first oil cylinder flows together and is discharged back to the oil tank through the oil passage 100 and the first oil port CB.

The servo self-locking mechanism keeps the locking trend of the jacking system in the process of vertically moving, jacking and adjusting the jacking system, and vertically moving, jacking and adjusting the jacking system are completed to immediately lock the jacking system. The control mode of the servo self-locking mechanism is simple and easy to control, the effectiveness is strong, the safety is high, the double-acting hydraulic reset is realized, and the installation space can be saved; the hydraulic reset mechanism in this application makes jacking system and follow-up self-locking mechanism's oil circuit intercommunication set up to make whole control process automation degree higher, do not need artificial intervention.

The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present invention without departing from the spirit and scope of the present invention and shall be covered by the appended claims.

Claims

1. Follow-up auto-lock jack, its characterized in that includes: the jacking system is used for moving in the horizontal or vertical direction, the servo self-locking mechanism is movably connected with the jacking system, and the hydraulic resetting mechanism is used for communicating the oil passages of the jacking system and the servo self-locking mechanism.

2. The follow-up self-locking jack according to claim 1, wherein the jacking system comprises: the first cylinder barrel, a first piston rod, a first guide sleeve, a first piston, a stopping rod and an oil cylinder head, wherein the stopping rod is slidably sleeved in an inner hole of the first cylinder barrel, the first piston is slidably sleeved in the inner hole of the stopping rod and is installed at the first end of the first piston rod, the second end of the first piston rod is fixedly installed at the bottom end of the first cylinder barrel, the first guide sleeve is installed in the inner hole at the lower end of the stopping rod and is slidably sleeved on the first piston rod, and the oil cylinder head is installed in the inner hole at the upper end of the stopping rod; the first cylinder barrel is also movably connected with the follow-up self-locking mechanism.

3. The follow-up self-locking jack according to claim 2, wherein the first cylinder barrel is further provided with a first oil port and a second oil port.

4. The follow-up self-locking jack according to claim 2, wherein the jacking system further comprises: the pushing body is used for pushing a workpiece and arranged on the oil cylinder head.

5. A follow-up self-locking jack according to claim 2, 3 or 4, wherein the follow-up self-locking mechanism comprises: the stopping ring is arranged on the first cylinder and is movably connected with the stopping rod, the second piston rod is slidably sleeved in an inner hole of the second cylinder, the second piston rod is fixedly connected with the stopping ring, and the second cylinder is detachably connected with the first cylinder; the disc spring is sleeved on the second piston rod, one end of the disc spring is in contact with the retaining ring, and the second end of the disc spring is in contact with the second cylinder barrel.

6. The follow-up self-locking jack according to claim 5, wherein the second cylinder barrel is further provided with a tightening nut and a cap.

7. The follow-up self-locking jack according to claim 5, wherein a third oil port is further formed in the second cylinder.

8. The follow-up self-locking jack according to claim 5, wherein the hydraulic reset mechanism connects the third oil port of the jacking system with the first oil port of the follow-up self-locking mechanism, and under the action of the hydraulic reset mechanism, the follow-up self-locking mechanism overcomes the compression force of the disc spring and releases the locking of the follow-up self-locking mechanism to the jacking system.

9. The follow-up self-locking jack according to claim 5, wherein the backstop ring is provided with a first ratchet, the backstop rod is provided with a second ratchet, and the first ratchet and the second ratchet are arranged in a matching manner.

10. The follow-up self-locking jack of claim 9, wherein the first or second ratchet teeth comprise a plurality of continuous lengths of unidirectional beveled tooth surfaces.