Follow-up self-locking jack

Abstract

The present application discloses a follower self-locking jack, including: a jacking system, a follower self-locking mechanism and a hydraulic reset mechanism. The jacking system is used for movement in the horizontal or vertical direction. The follower self-locking mechanism is movably connected to the jacking system. The hydraulic reset mechanism connects the oil circuits of the jacking system and the follower self-locking mechanism. The follower self-locking mechanism in the present application maintains the locking tendency of the jacking system during the jacking adjustment process of the jacking system moving up and down, and immediately locks the jacking system after the jacking adjustment of the jacking system moving up and down is completed. The control method of the above-mentioned follower self-locking mechanism is simple and easy to control, highly effective, highly safe, double-acting hydraulic reset and can save installation space; the hydraulic reset mechanism in the present application connects the oil circuits of the jacking system and the follower self-locking mechanism, thereby making the entire control process more automated and requiring no manual intervention.

Description

Technical Field

[0001] The present application belongs to the technical field of jacks, and in particular relates to a follow-up self-locking jack. Background Art

[0002] Existing three-dimensional jacks are usually equipped with safety valves, balance valves, hydraulic locks, piston rods with nuts to prevent retreat, and ratchet locks on the jack piston rods to provide safety protection to prevent accidents caused by heavy objects falling. However, there are still the following problems:

[0003] Configuring safety valves, balancing valves, hydraulic locks and other hydraulic valves for safety protection to prevent heavy objects from falling is completely dependent on hydraulic valves for safety protection. Existing hydraulic valves cannot achieve zero leakage, so they cannot be effectively locked for a long time. Moreover, these hydraulic valves will lose safety protection when the hydraulic pipelines fail or are damaged.

[0004] The piston rod plus nut anti-retraction means that the main oil cylinder piston rod surface is machined with an external thread structure, and the nut is matched with a nut to manually adjust the nut position so that the nut contacts and supports the main oil cylinder body to prevent retreat and lock. This method requires manual adjustment of the nut position by humans or control of motors and motors after the main oil cylinder is lifted to the required position so that the nut contacts and supports the main oil cylinder body; when the main oil cylinder retracts, it is necessary to manually adjust the nut position by humans or control motors and motors so that the nut is away from the main oil cylinder body before it can be retracted; or the control method of motors and motors is to start the motors and motors after the main oil cylinder stops running. During the operation, it is impossible to achieve follow-up self-locking. When manually adjusting the nut position, it is very unsafe for the operator under the heavy object.

[0005] Methods such as adding a nut to prevent retreat on the piston rod require extending the thread on the jack piston rod to cooperate with the nut locking. The part that needs to be extended is larger than the effective stroke, so the height of the jack body is greatly increased. It relies on the gravity of the equipment and load or the spring to reset. This method is prone to the defect of not being able to reset to the end of the stroke during use, thus affecting the effective lifting height.

[0006] The ratchet lock method of extending the piston rod of the jack requires that the extended portion be greater than the effective stroke, so that the height of the jack body is greatly increased. It cannot be used in some applications, especially in ship hull welding, railways, roads, bridges or similar beam-type heavy object displacement operations when the on-site installation space is small. Summary of the invention

[0007] In view of the above-mentioned shortcomings or deficiencies of the prior art, the technical problem to be solved by the present application is to provide a follow-up self-locking jack.

[0008] To solve the above technical problems, this application is implemented through the following technical solutions:

[0009] The present application proposes a follower self-locking jack, comprising: a jacking system, a follower self-locking mechanism and a hydraulic reset mechanism. The jacking system is used for movement in the horizontal or vertical direction, the follower self-locking mechanism is movably connected to the jacking system, and the hydraulic reset mechanism connects the oil circuits of the jacking system and the follower self-locking mechanism.

[0010] Further, the above-mentioned follow-up self-locking jack, wherein the jacking system includes: a first cylinder, a first piston rod, a first guide sleeve, a first piston, a stop rod and a cylinder head, the stop rod is slidably sleeved in the inner hole of the first cylinder, the first piston is slidably sleeved in the inner hole of the stop rod and installed on the first end of the first piston rod, the second end of the first piston rod is fixedly installed on the bottom end of the first cylinder, the first guide sleeve is installed in the inner hole of the lower end of the stop rod and slidably sleeved on the first piston rod, and the cylinder head is installed in the inner hole of the upper end of the stop rod; the first cylinder is also movably connected to the follow-up self-locking mechanism.

[0011] Furthermore, in the above-mentioned follower self-locking jack, the first cylinder is also provided with a first oil port and a second oil port.

[0012] Furthermore, in the above-mentioned follower self-locking jack, the jacking system also includes: a pushing body, the pushing body is used to push the workpiece, and the pushing body is arranged on the cylinder head.

[0013] Furthermore, in the above-mentioned follow-up self-locking jack, the follow-up self-locking mechanism includes: a stop ring, a disc spring, a second piston rod and a second cylinder, the stop ring is arranged on the first cylinder and is movably connected to the stop rod, the second piston rod is slidably sleeved in the inner hole of the second cylinder, the second piston rod is also fixedly connected to the stop ring, and the second cylinder is also detachably connected to the first cylinder; the disc spring is sleeved on the second piston rod, and one end of the disc spring is in contact with the stop ring, and the second end of the disc spring is in contact with the second cylinder.

[0014] Furthermore, in the above-mentioned follower self-locking jack, a locking nut and a cap are also provided on the second cylinder.

[0015] Furthermore, in the above-mentioned follower self-locking jack, a third oil port is also provided on the second cylinder.

[0016] Furthermore, in the above-mentioned follower self-locking jack, the hydraulic reset mechanism connects the third oil port in the jacking system and the first oil port of the follower self-locking mechanism. Under the action of the hydraulic reset mechanism, the follower self-locking mechanism overcomes the compression force of the disc spring and releases the locking of the jacking system by the follower self-locking mechanism.

[0017] Furthermore, in the above-mentioned follower self-locking jack, the backstop ring is provided with a first ratchet tooth, the backstop rod is provided with a second ratchet tooth, and the first ratchet tooth and the second ratchet tooth are matched with each other.

[0018] Furthermore, in the above-mentioned follower self-locking jack, the first ratchet tooth or the second ratchet tooth includes a plurality of continuous unidirectional bevel tooth surfaces.

[0019] Compared with the prior art, this application has the following technical effects:

[0020] In the present application, the follow-up self-locking mechanism maintains the locking tendency of the jacking system during the jacking adjustment process of the jacking system moving up and down, and immediately locks the jacking system after the jacking adjustment is completed. The control method of the follow-up self-locking mechanism is simple and easy to control, highly effective, highly safe, double-acting hydraulic reset and can save installation space;

[0021] The hydraulic reset mechanism in the present application enables the oil circuit of the jacking system to be connected with the follow-up self-locking mechanism, thereby making the entire control process more automated without the need for manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 : A three-dimensional diagram of the follow-up self-locking jack of the present application;

[0024] Figure 2 : The plan view of the follow-up self-locking jack of this application;

[0025] Figure 3 : A cross-sectional view of the follow-up self-locking jack of the present application along CC;

[0026] Figure 4 : A cross-sectional view of the follow-up self-locking jack of the present application along EE;

[0027] Figure 5 :like Figure 3 A partial enlarged view of the structure shown. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] like Figures 1 to 5 As shown, in one embodiment of the present application, the follower self-locking jack includes: a jacking system Z, a follower self-locking mechanism and a hydraulic reset mechanism, wherein the jacking system Z is used for horizontal or vertical movement, the follower self-locking mechanism is movably connected to the jacking system Z, and the hydraulic reset mechanism connects the oil circuits of the jacking system Z and the follower self-locking mechanism. The control method of the follower self-locking mechanism is simple and easy to control, highly effective, highly safe, double-acting hydraulic reset and can save installation space; the hydraulic reset mechanism in this embodiment connects the oil circuits of the jacking system and the follower self-locking mechanism, thereby making the entire control process more automated and requiring no manual intervention.

[0033] The jacking system Z comprises: a first cylinder 13, a first piston rod 15, a first guide sleeve 16, a first piston 18, a stop rod 17 and a cylinder head 20, wherein the stop rod 17 is slidably sleeved in the inner hole of the first cylinder 13, the first piston 18 is slidably sleeved in the inner hole of the stop 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 13, the first guide sleeve 16 is installed in the inner hole at the lower end of the stop rod 17 and is slidably sleeved on the first piston rod 15, and the cylinder head 20 is installed in the inner hole at the upper end of the stop rod 17; the first cylinder 13 is also movably connected with the follow-up self-locking mechanism. During the jacking adjustment process of the jacking system Z moving up and down, the follow-up self-locking mechanism maintains the locking trend of the jacking system Z, and the follow-up self-locking mechanism immediately locks the jacking system Z after the jacking adjustment of the jacking system Z moving up and down is completed.

[0034] Furthermore, the first cylinder 13 is also provided with a first oil port (rodless chamber oil port) CB and a second oil port (rod chamber oil port) CA.

[0035] Furthermore, 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 clamping nut 14 .

[0036] The lifting system Z further includes: a pushing body 21 , which is used to push the workpiece, and the pushing body 21 is arranged on the cylinder head 20 .

[0037] like Figure 3 and Figure 5 As shown, the follow-up self-locking mechanism includes: a stop ring 22, a disc spring 23, a second piston rod 24 and a second cylinder 25. The stop ring 22 is arranged on the first cylinder 13 mentioned above and is movably connected to the stop rod 17. The second piston rod 24 is slidably sleeved in the inner hole of the second cylinder 25. The second piston rod 24 is also fixedly connected to the stop ring 22. Further, the second piston rod 24 can be fixedly connected to the stop ring 22 by means of a pin screw or the like; the second cylinder 25 is also detachably connected to the first cylinder 13. Further, the second cylinder 25 can be screwed on the first cylinder 13 by internal and external threads; the disc spring 23 is sleeved on the second piston rod 24, and one end of the disc spring 23 is in contact with the stop ring 22, and the second end of the disc spring 23 is in contact with the second cylinder 25.

[0038] Furthermore, a cap 26 is provided on the second cylinder 13 , and the cap 26 is screwed on the second cylinder 13 .

[0039] Furthermore, the second cylinder 13 is also provided with a third oil port YA.

[0040] Furthermore, the above-mentioned follow-up self-locking mechanism also includes: a backstop ring cover plate 19, and the backstop ring cover plate 19 is installed on the inner hole step at the upper end of the third cylinder 13.

[0041] The hydraulic reset mechanism connects the third oil port YA in the jacking system Z and the first oil port CB of the follow-up self-locking mechanism. Under the action of the hydraulic reset mechanism, the follow-up self-locking mechanism overcomes the compression force of the disc spring 23 and releases the locking of the jacking system Z by the follow-up self-locking mechanism.

[0042] Furthermore, the anti-backward ring 22 is provided with a first ratchet tooth 201 , and the anti-backward rod 17 is provided with a second ratchet tooth 202 , and the first ratchet tooth 201 and the second ratchet tooth 202 are matched with each other.

[0043] Furthermore, the first ratchet tooth 201 or the second ratchet tooth 202 includes a plurality of continuous unidirectional bevel tooth surfaces.

[0044] In this embodiment, by adjusting the initial compression force of the disc spring 23 when the second cylinder 25 is screwed into the outer circle of the step at the upper end of the first cylinder 13 mentioned above, the preload force generated by the disc spring 23 on the backstop ring 22 is adjusted, thereby controlling the locking force of the backstop ring 22 on the backstop rod 17; when the second cylinder 25 is screwed in and the depth adjustment is completed, the second tightening nut 27 is tightened to prevent the second cylinder 25 from loosening and affecting the preload force; the cap 26 mentioned above can be screwed on the second cylinder 25 as the back cover of the second cylinder 25 to prevent the second piston rod 24 from loosening at the connection with the backstop ring 22, causing the second piston rod 24 to disengage from the backstop ring 22.

[0045] Further, in this embodiment, Figure 1 and Figure 2 As shown, a longitudinal movement system Y and / or a transverse movement system X may also be provided, wherein the longitudinal movement system Y is connected to the transverse movement system X and drives the transverse movement system X to move longitudinally, and the transverse movement system X is also connected to the lifting system Z and drives the lifting system Z to move laterally, and the lifting system Z is used to move in the vertical direction; the follow-up self-locking mechanism is movably connected to the lifting system Z, and the follow-up self-locking mechanism locks the lifting system Z or releases the locking of the lifting system Z.

[0046] This embodiment can adjust the workpiece in three directions, horizontal, longitudinal and vertical, through the longitudinal movement system Y, transverse movement system X and jacking system Z, to meet the displacement operation of hull welding, railway, highway, bridge or similar beam-type heavy objects; the above-mentioned follow-up self-locking mechanism maintains the locking tendency of the jacking system Z during the jacking adjustment process of the jacking system Z, and immediately locks the jacking system Z after the jacking adjustment of the jacking system Z is completed. The control method of the above-mentioned follow-up self-locking mechanism is simple and easy to control, highly effective and safe.

[0047] Among them, Figure 3 As shown, the longitudinal movement system Y comprises: a third cylinder 1, a third piston rod 2, a third guide sleeve 4 and a third housing 6. The third cylinder 1 is fixedly mounted on the third housing 6. The first end of the third piston rod 2 is slidably sleeved in the third cylinder 1. The second end of the third piston rod 2 is fixedly mounted on the transverse movement system X. The third guide sleeve 4 is mounted in the third cylinder 1 and slidably sleeved on the first end of the third piston rod 2. 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 housing 6 and adjusts the workpiece through the longitudinal back and forth movement of the third piston rod 2.

[0048] Furthermore, the third cylinder 1 is installed on the third box body 6 and fixed by a third clamping nut 3, and the third piston rod 2 is connected to the fourth box body 12 in the transverse movement system X through a first pin shaft 5.

[0049] Specifically, when oil is supplied to the fourth oil port ZB, the third piston rod 2 extends outward, pushing the fourth box 12 in the lateral movement system X described below to move in the longitudinal positive direction, and the hydraulic oil in the rod chamber of the third oil cylinder is discharged back to the oil tank through the fifth oil port ZA. When oil is supplied to the fifth oil port ZA, the third piston rod 2 retracts inward, pulling the fourth box 12 in the lateral movement system X described below to move in the longitudinal negative direction, and the hydraulic oil in the rodless chamber of the third oil cylinder is discharged back to the oil tank through the fourth oil port ZB.

[0050] Among them, Figure 4As shown, the transverse movement system X includes: a fourth cylinder 7, a fourth piston rod 8, a fourth guide sleeve 10 and a fourth box 12, wherein the fourth cylinder 7 is fixedly mounted on the fourth box 12, the first end of the fourth piston rod 8 is slidably sleeved in the fourth cylinder 7, the second end of the fourth piston rod 8 is fixedly mounted on the jacking system Z, the fourth guide sleeve 10 is mounted in the fourth cylinder 7 and slidably sleeved on the second end of the fourth piston rod 8; the fourth cylinder 7 is also provided with a sixth oil port HB (rodless chamber oil port) and a seventh oil port HA (rod chamber oil port). The fourth cylinder 7 is fixedly mounted on the fourth box 12 and adjusts the workpiece through the lateral back and forth movement of the fourth piston rod 8.

[0051] Furthermore, in this embodiment, the fourth cylinder 7 is mounted on the fourth box body 12 and fixed by a fourth clamping nut 9, and the fourth piston rod 8 is connected to the first cylinder 13 in the jacking system Z described below through a second pin 11.

[0052] Specifically, the sixth oil port HB supplies oil, the fourth piston rod 8 extends outward, pushes the first cylinder barrel 13 in the jacking system Z described below to move in the positive lateral direction, and the hydraulic oil in the rod chamber of the fourth oil cylinder is discharged back to the oil tank through the seventh oil port HA. The seventh oil port HA is supplied with oil, the fourth piston rod 8 retracts inward, pulls the first cylinder barrel 13 in the jacking system Z described below to move in the negative lateral direction, and the hydraulic oil in the rodless chamber of the fourth oil cylinder is discharged back to the oil tank through the sixth oil port HB.

[0053] The working principle of this embodiment is as follows:

[0054] Oil is supplied to the third oil port YA, and the hydraulic oil enters the rod chamber of the second oil cylinder through the oil channel 106. The second piston rod 24 overcomes the compressive force of the disc spring 23 and retracts, pulling the check ring 22 to separate outward so that the first ratchet tooth 201 of the check ring 22 and the second ratchet tooth 202 of the check rod 17 are separated and the locking state is released; oil supply to the third oil port YA is stopped, and the second piston rod 24 extends outward under the compressive force of the disc spring 23, and the hydraulic oil in the rod chamber of the second oil cylinder is discharged to the third oil port YA through the oil channel 106, and the check ring 22 merges inward under the compressive force of the disc spring 23 so that the first ratchet tooth 201 of the check ring 22 and the second ratchet tooth 202 of the check rod 17 are engaged and maintained in the locked state.

[0055] Oil is supplied to the first oil port CB in the jacking system. The pressure oil reaches the rodless chamber of the first oil cylinder through the oil passage 100, and reaches the rodless chamber of the reaction booster cylinder through the oil passages 101 and 102. The piston rod of the first oil cylinder, i.e., the backstop rod 17, extends upward under the action of the hydraulic oil pressure. If the second oil port CA is directly connected in parallel with the third oil port YA through the hydraulic reset mechanism, at this time, if the return oil back pressure is greater than the opening pressure of the hydraulic reset mechanism, the return oil back pressure hydraulic oil enters the rod chamber of the second oil cylinder through the oil passage 106, and the second piston rod 24 overcomes the compression force of the disc spring 23 and retracts, pulling the backstop ring 22 to separate outward, so that the first ratchet 201 of the backstop ring 22 and the second ratchet 202 of the backstop rod 17 are separated and the locking state is released; at this time, if the return oil back pressure is not greater than the opening pressure of the hydraulic reset mechanism During the extension of the piston rod of the first oil cylinder, i.e., the stop rod 17, the stop ring 22 is combined inwardly under the compressive force of the disc spring 23, so that the first ratchet 201 of the stop ring 22 and the second ratchet 202 of the stop rod 17 are meshed. Since the second ratchet 202 of the stop rod 17 and the first ratchet 201 of the stop ring 22 are mutually unidirectional oblique tooth surfaces, the second ratchet 202 continuously causes the stop ring 22 to overcome the compressive force of the disc spring 23 and separate outward to release the locking state during the extension of the piston rod of the first oil cylinder, i.e., the stop rod 17. The hydraulic oil in the rod chamber of the reaction booster oil cylinder is discharged back to the oil tank through the oil passages 103, 104, and 105 through the second oil port CA. Stop supplying oil to the first oil port CB, the second piston rod 24 extends under the compressive force of the disc spring 23, the hydraulic oil in the rod chamber of the second oil cylinder is discharged back to the oil tank through the third oil port YA via the oil passage 106, and the backstop ring 22 merges inwardly under the compressive force of the disc spring 23 so that the first ratchet tooth 201 of the backstop ring 22 and the second ratchet tooth 202 of the backstop rod 17 engage and maintain a locked state.

[0056] When the second oil port CA and the third oil port YA in the above technical solution do not adopt the method of direct parallel connection: supply oil to the first oil port CB, the pressure oil reaches the rodless chamber of the first oil cylinder through the oil passage 100, and reaches the rodless chamber of the reaction booster oil cylinder through the oil passages 101 and 102, and the piston rod of the first oil cylinder, i.e., the backstop rod 17, extends upward under the action of the hydraulic oil pressure. At this time, if oil is supplied to the third oil port YA, the hydraulic oil enters the rod chamber of the second oil cylinder through the oil passage 106, and the second piston rod 24 retracts to overcome the compression force of the disc spring 23, pulling the backstop ring 22 to separate outward, so that the first ratchet 201 of the backstop ring 22 and the second ratchet 202 of the backstop rod 17 are separated and the locking state is released. If the third oil port YA is not supplied with oil, the stop ring 22 will merge inwards under the compressive force of the disc spring 23 during the extension of the first oil cylinder piston rod, i.e., the stop rod 17, so that the first ratchet 201 of the stop ring 22 and the second ratchet 202 of the stop rod 17 are meshed. Since the second ratchet 202 of the stop rod 17 and the first ratchet 201 of the stop ring 22 are mutually unidirectional beveled tooth surfaces, the second ratchet 202 continuously causes the stop ring 22 to overcome the compressive force of the disc spring 23 and separate outwards to release the locking state during the extension of the first oil cylinder piston rod, i.e., the stop rod 17. The hydraulic oil in the rod chamber of the reaction booster oil cylinder is discharged back to the oil tank through the oil passages 103, 104, and 105 through the second oil port CA. Stop supplying oil to the third oil port YA, the second piston rod 24 extends under the compressive force of the disc spring 23, the hydraulic oil in the rod chamber of the second oil cylinder is discharged back to the oil tank through the third oil port YA via the oil passage 106, and the backstop ring 22 merges inwardly under the compressive force of the disc spring 23 so that the first ratchet tooth 201 of the backstop ring 22 and the second ratchet tooth 202 of the backstop rod 17 engage and maintain a locked state.

[0057] 106, when the pressure in the oil passage is greater than the opening pressure of the hydraulic reset mechanism, the hydraulic oil passes through the oil passage 106 and enters the second oil cylinder rod chamber, and the second oil passage CA is directly connected to the third oil passage YA in parallel. At this time, since the volume of the rod chamber of the reaction booster cylinder is smaller than the sum of the volume of the rodless chamber of the reaction booster cylinder and the rodless chamber of the first cylinder, the hydraulic oil in the rodless chamber of the first cylinder has no time to be discharged back to the oil tank, generating back pressure, and the piston rod of the first cylinder, i.e., the stop rod 17, does not retract. The pressure in the rod chamber of the first cylinder continues to increase. When the pressure in the rod chamber of the first cylinder is greater than the opening pressure of the hydraulic reset mechanism, the hydraulic oil passes through the oil passage 106 and enters the rod chamber of the second cylinder, and the second piston rod 24 overcomes the compression force of the disc spring 23 and retracts, pulling the stop ring 22 to separate outward so that the first ratchet tooth 201 of the stop ring 22 and the second ratchet tooth 202 of the stop rod 17 are separated and the locking state is released. The piston rod of the first cylinder, i.e., the stop rod 17, retracts downward under the action of the hydraulic oil pressure. The hydraulic oil in the rodless chamber of the reaction booster cylinder passes through the oil passage 102, the oil passage 101 and the hydraulic oil in the rodless chamber of the first cylinder and is discharged back to the oil tank through the oil passage 100 through the first oil port CB.

[0058] In the above technical solution, if the second oil port CA and the third oil port YA are not connected in parallel through direct connection, the third oil port YA is supplied with oil first, and the hydraulic oil enters the rod chamber of the second oil cylinder through the oil passage 106, and the second piston rod 24 retracts to overcome the compression force of the disc spring 23, pulling the backstop ring 22 to separate outward so that the first ratchet 201 of the backstop ring 22 and the second ratchet 202 of the backstop rod 17 are separated and the locking state is released; then the second oil port CA is supplied with oil, and the pressure oil reaches the rod chamber of the reaction booster oil cylinder through the oil passages 105, 104, and 103, and the piston rod of the first oil cylinder, i.e., the backstop rod 17, retracts downward under the action of the hydraulic oil pressure. The hydraulic oil in the rodless chamber of the reaction booster oil cylinder passes through the oil passages 102, 101, and the hydraulic oil in the rodless chamber of the first oil cylinder, and is discharged back to the oil tank through the first oil port CB through the oil passage 100.

[0059] The follow-up self-locking mechanism in the present application maintains the locking tendency of the jacking system during the jacking adjustment process of the jacking system moving up and down, and immediately locks the jacking system after the jacking adjustment is completed. The control method of the above-mentioned follow-up self-locking mechanism is simple and easy to control, highly effective, highly safe, double-acting hydraulic reset and can save installation space; the hydraulic reset mechanism in the present application connects the oil circuit of the jacking system and the follow-up self-locking mechanism, so that the entire control process is more automated and does not require manual intervention.

[0060] The above embodiments are only used to illustrate the technical solution of the present application but not to limit it. The present application is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solution of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application, and should be included in the scope of the claims of the present application.

Claims

1. Follow-up self-locking jack, characterized in that: include: A jacking system, a follower self-locking mechanism and a hydraulic reset mechanism, wherein the jacking system is used for horizontal or vertical movement, the follower self-locking mechanism is movably connected to the jacking system, and the hydraulic reset mechanism connects the oil circuits of the jacking system and the follower self-locking mechanism; The jacking system comprises: a first cylinder, a first piston rod, a first guide sleeve, a first piston, a backstop rod and a cylinder head, the backstop rod is slidably sleeved in the inner hole of the first cylinder, the first piston is slidably sleeved in the inner hole of the backstop rod and installed on the first end of the first piston rod, the second end of the first piston rod is fixedly installed on the bottom end of the first cylinder, the first guide sleeve is installed in the inner hole of the lower end of the backstop rod and slidably sleeved on the first piston rod, and the cylinder head is installed in the inner hole of the upper end of the backstop rod; the first cylinder is also movably connected with the follower self-locking mechanism; The first cylinder is also provided with a first oil port and a second oil port; The jacking system further comprises: a pushing body, which is used to push the workpiece, and is arranged on the cylinder head; The follow-up self-locking mechanism comprises: a stop ring, a disc spring, a second piston rod and a second cylinder barrel, wherein the stop ring is arranged on the first cylinder barrel and is movably connected to the stop ring, the second piston rod is slidably sleeved in the inner hole of the second cylinder barrel, the second piston rod is also fixedly connected to the stop ring, and the second cylinder barrel is also detachably connected to the first cylinder barrel; the disc spring is sleeved on the second piston rod, and one end of the disc spring is in contact with the stop ring, and the second end of the disc spring is in contact with the second cylinder barrel; The second cylinder is also provided with a tightening nut and a cap; The second cylinder is also provided with a third oil port; The hydraulic reset mechanism connects the third oil port in the jacking system and the first oil port of the follow-up self-locking mechanism. 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 jacking system by the follow-up self-locking mechanism.

2. The follow-up self-locking jack according to claim 1, characterized in that: The anti-backward ring is provided with a first ratchet tooth, the anti-backward rod is provided with a second ratchet tooth, and the first ratchet tooth and the second ratchet tooth are matched and arranged.

3. The follow-up self-locking jack according to claim 2, characterized in that: The first ratchet tooth or the second ratchet tooth includes a plurality of continuous unidirectional bevel tooth surfaces.

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