A mechanical locking hydraulic cylinder assembly

Abstract

The present invention discloses a mechanical locking type hydraulic oil cylinder assembly, which relates to the technical field of hydraulic oil cylinders, including a cylinder barrel and an oil inlet barrel connected to one end of the cylinder barrel, an oil inlet plate slidably connected to the inside of the oil inlet barrel, a piston member slidably connected to the inside of the cylinder barrel, and a piston rod fixedly connected to one end of the piston member; and also includes a linkage rod, a first locking assembly connected to the upper end of the oil inlet plate, a second locking assembly provided on the surface of the piston rod, and the first locking assembly and the second locking assembly connected via a linkage rod. The mechanical locking type hydraulic oil cylinder assembly provided by the present invention is configured to quickly drive the oil inlet plate to reset and re-block the oil inlet barrel when the hydraulic oil stops flowing, so that the inside of the cylinder barrel is sealed and pressure-maintained to lock the piston rod, and synchronously drive the second locking assembly to tighten the piston rod for mechanical locking, so that the hydraulic oil cylinder is locked by the first locking assembly using oil pressure, and is further locked by the mechanical locking force of the second locking assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, and in particular to a mechanically locked hydraulic cylinder assembly. Background Art

[0002] A hydraulic cylinder is a type of hydraulic actuator widely used in various mechanical devices. The hydraulic cylinder's working principle is to use hydraulic oil as the transmission medium, converting mechanical energy into hydraulic energy through a hydraulic pump, and then converting the hydraulic energy into mechanical energy through a hydraulic cylinder.

[0003] Hydraulic cylinder self-locking methods include oil-line self-locking and mechanical self-locking. Oil-line self-locking involves installing a valve to maintain pressure, preventing the hydraulic oil in the cylinder from returning to the tank and ensuring that the cylinder chamber is filled with oil at a certain pressure. Mechanical self-locking involves installing a nut on the cylinder plunger. Once the cylinder rises to the desired position, the nut is rotated all the way to contact the cylinder body, securing the plunger at the desired height.

[0004] However, both of these self-locking methods have their drawbacks. The oil circuit self-locking is not very safe and reliable. If there is a leak, the plunger will slowly return to its position. The mechanical self-locking will cause the cylinder wall to be subjected to a large positive pressure, which is easy to deform and damage, and has a poor load-bearing capacity. In addition, the mechanical self-locking device has high requirements on the cleanliness of the hydraulic oil. Impurities or contaminants may affect the locking effect. Therefore, a hydraulic cylinder with strong locking force, stability and long life that can overcome these disadvantages is needed. Summary of the Invention

[0005] The object of the present invention is to provide a mechanical locking hydraulic cylinder assembly to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A mechanical locking hydraulic cylinder assembly comprises a cylinder barrel and an oil inlet barrel connected to one end of the cylinder barrel, an oil inlet plate is slidably connected to the inside of the oil inlet barrel, a piston member is slidably connected to the inside of the cylinder barrel, and one end of the piston member is fixedly connected to a piston rod;

[0008] It also includes a linkage rod, the upper end of the oil inlet plate is connected to a first locking assembly, the surface of the piston rod is provided with a second locking assembly, and the first locking assembly and the second locking assembly are connected by a linkage rod;

[0009] When hydraulic oil is introduced into the oil inlet cylinder, the hydraulic oil pushes up the oil inlet plate and then enters the cylinder to push the piston member, so that the first locking assembly drives the second locking assembly to open and no longer lock the piston rod, thereby allowing the piston rod to extend and scrape off dirt on the surface of the piston rod;

[0010] When the hydraulic oil stops flowing in, the first locking assembly quickly drives the oil inlet plate to return to its original position to block the oil inlet cylinder, so that the interior of the cylinder is sealed, pressure is maintained, and the piston rod is locked, and the second locking assembly is synchronously driven to tighten the piston rod for mechanical locking.

[0011] As a further preferred solution in the embodiment of the present invention, it also includes a top box, a linkage groove is provided in the top box, the first locking assembly includes a connecting strip fixedly connected to the upper end of the oil inlet plate, and the upper end of the connecting strip is provided with a contraction groove, and a first tooth plate is slidably connected in the contraction groove, and the upper end of the connecting strip is also connected to a second tooth plate, and a driving gear is rotatably connected in the linkage groove, and the first tooth plate and the second tooth plate are both engaged with the driving gear, and the connecting strip, the first tooth plate and the second tooth plate are all slidably matched with the linkage groove.

[0012] As a further preferred solution in an embodiment of the present invention, the first locking assembly also includes a first connecting block fixedly connected to the upper end of the first tooth plate, and a second connecting block is fixedly connected to the upper end of the second tooth plate, and a reset spring is connected between the first connecting block and the second connecting block.

[0013] As a further preferred solution in the embodiment of the present invention, it also includes a base, a through hole is provided on one side of the base, one end of the cylinder is connected to the through hole, a sealing ring is provided inside the same end of the cylinder, one end of the piston rod passes through the sealing ring and slides with the through hole, and an oil outlet is connected on the side wall of the cylinder.

[0014] As a further preferred solution in the embodiment of the present invention, a storage groove is provided on one side of the top box, the storage groove is connected with the linkage groove, the linkage rod is slidably arranged in the storage groove, and one end of the linkage rod is fixedly connected to the surface of one side of the connecting bar, and a retaining rail is connected to the surface of one side of the base, and the surface of the linkage rod slides with the inside of the retaining rail.

[0015] As a further preferred solution in an embodiment of the present invention, the second locking assembly includes a locking ring arranged on the surface of the piston rod, and an oil scraping groove is provided on one side surface of the locking ring, and the oil scraping groove is interference fit with the surface of the piston rod, and a connecting piece is connected to the other side surface of the locking ring.

[0016] As a further preferred scheme in the embodiment of the present invention, the second locking assembly also includes a linkage bar fixedly connected to the other end of the linkage rod, and one end of the linkage bar is provided with a limiting groove, and a linkage shaft is slidably connected in the limiting groove, and both ends of the linkage shaft are connected to the second connecting seat, and one end of the second connecting seat is connected to the first connecting seat, and the connecting member is hinged inside the first connecting seat, and the same end surface of the second connecting seat is also connected to a convergence shaft, and one end of the convergence shaft is rotatably connected to the side surface of the base.

[0017] As a further preferred solution in the embodiment of the present invention, an oil return cylinder is connected to the upper surface of the lower part of the base, the upper end of the oil return cylinder is connected to the lower end of the oil inlet cylinder, and an oil return port is connected on the side wall of the oil return cylinder.

[0018] As a further preferred solution in the embodiment of the present invention, a circular hole is provided at the upper end of the oil return cylinder, and an oil inlet rod is connected to the lower end of the oil inlet plate. The oil inlet rod slides with the circular hole, and a first limiting ring and a second limiting ring are connected to the surface of the oil inlet rod.

[0019] As a further preferred solution in the embodiment of the present invention, an oil inlet is connected to the side wall of the oil inlet cylinder.

[0020] In the above technical solution, the mechanical locking hydraulic cylinder assembly provided by the present invention has the following beneficial effects:

[0021] The present invention provides a first locking assembly to quickly drive the oil inlet plate to reset and re-block the oil inlet cylinder when the hydraulic oil stops flowing, so that the interior of the cylinder cylinder is sealed, pressure maintained, and the piston rod is locked, and the second locking assembly is synchronously driven to tighten the piston rod for mechanical locking. As a result, the hydraulic cylinder is locked by the first locking assembly using oil pressure, and is further locked by the mechanical locking force of the second locking assembly, so that the cylinder can be firmly locked at any position.

[0022] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0023] This application document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the overall structure from another perspective provided by an embodiment of the present invention;

[0027] Figure 3 The embodiment of the present invention provides Figure 2 A in the middle is an enlarged structural diagram;

[0028] Figure 4A schematic diagram of the internal structure provided by an embodiment of the present invention;

[0029] Figure 5 The embodiment of the present invention provides Figure 4 The enlarged structural diagram at B in the middle;

[0030] Figure 6 The embodiment of the present invention provides Figure 4 The enlarged structural diagram at C in the middle;

[0031] Figure 7 A schematic structural diagram of a second locking assembly provided in an embodiment of the present invention;

[0032] Figure 8 A schematic structural diagram of the first locking assembly provided in an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Base; 2. Piston rod; 201. Sealing ring; 202. Piston member; 203. Cylinder; 204. Oil outlet; 3. Oil inlet cylinder; 301. Oil inlet; 302. Oil return cylinder; 303. Oil return port; 4. Oil inlet plate; 401. Oil inlet rod; 402. First limiting ring; 403. Second limiting ring; 5. Top box; 501. Storage slot; 502. Linkage slot; 6. Connecting strip; 601. Contraction slot; 60 2. First tooth plate; 603. First connecting block; 604. Second tooth plate; 605. Second connecting block; 606. Return spring; 607. Driving gear; 7. Linkage rod; 701. Retaining rail; 702. Linkage bar; 703. Limiting groove; 8. Locking ring; 801. Oil scraper groove; 802. Connecting piece; 803. First connecting seat; 804. Clamping shaft; 805. Second connecting seat; 806. Linkage shaft. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0036] See also Figure 1 - Figure 8 A mechanical locking hydraulic cylinder assembly includes a cylinder 203 and an oil inlet cylinder 3 connected to one end of the cylinder 203, an oil inlet plate 4 is slidably connected to the inside of the oil inlet cylinder 3, a piston 202 is slidably connected to the inside of the cylinder 203, and one end of the piston 202 is fixedly connected to the piston rod 2;

[0037] It also includes a linkage rod 7, a first locking assembly is connected to the upper end of the oil inlet plate 4, a second locking assembly is provided on the surface of the piston rod 2, and the first locking assembly and the second locking assembly are connected by the linkage rod 7;

[0038] When hydraulic oil is introduced into the oil inlet cylinder 3, the hydraulic oil pushes up the oil inlet plate 4 and then enters the cylinder 203 to push the piston member 202, so that the first locking assembly drives the second locking assembly to open and no longer lock the piston rod 2, thereby allowing the piston rod 2 to extend and scrape off dirt on the surface of the piston rod 2;

[0039] When the hydraulic oil stops flowing in, the first locking assembly quickly drives the oil inlet plate 4 to reset and block the oil inlet tube 3, so that the interior of the cylinder 203 is sealed and pressure-maintained to lock the piston rod 2, and synchronously drives the second locking assembly to tighten the piston rod 2 for mechanical locking.

[0040] The present invention provides a first locking assembly to quickly drive the oil inlet plate 4 to reset and re-block the oil inlet cylinder 3 when the hydraulic oil stops flowing, so that the interior of the cylinder 203 is sealed and pressure-maintained to lock the piston rod 2, and synchronously drives the second locking assembly to tighten the piston rod 2 for mechanical locking. As a result, the hydraulic cylinder is locked by the first locking assembly using oil pressure, and is further locked by the mechanical locking force of the second locking assembly, so that the cylinder can be firmly locked at any position.

[0041] Furthermore, the piston 202 is integrated with an O-ring, a wear-resistant ring, a sealing ring and a gasket, which is a prior art and will not be described in detail.

[0042] In the embodiment further provided by the present invention, it also includes a top box 5, a linkage groove 502 is provided in the top box 5, and the first locking assembly includes a connecting strip 6 fixedly connected to the upper end of the oil inlet plate 4, and the upper end of the connecting strip 6 is provided with a contraction groove 601, and the first tooth plate 602 is slidably connected in the contraction groove 601, and the upper end of the connecting strip 6 is also connected to the second tooth plate 604, and a driving gear 607 is rotatably connected in the linkage groove 502, and the first tooth plate 602 and the second tooth plate 604 are both engaged with the driving gear 607, and the connecting strip 6, the first tooth plate 602 and the second tooth plate 604 are all slidably matched with the linkage groove 502.

[0043] Specifically, when the oil inlet plate 4 rises, it drives the connecting bar 6 and the second tooth plate 604 to slide upward in the linkage groove 502 , thereby causing the driving gear 607 to rotate to drive the first tooth plate 602 to slide downward in the linkage groove 502 and the contraction groove 601 .

[0044] In an embodiment further provided by the present invention, the first locking assembly also includes a first connecting block 603 fixedly connected to the upper end of the first tooth plate 602, and a second connecting block 605 fixedly connected to the upper end of the second tooth plate 604, and a return spring 606 is connected between the first connecting block 603 and the second connecting block 605.

[0045] Furthermore, when the second tooth plate 604 and the first tooth plate 602 slide synchronously in opposite directions, the first connecting block 603 and the second connecting block 605 are driven to compress the return spring 606, applying a bidirectional compression force to the return spring 606, thereby quickly increasing the compression amount of the return spring 606 and increasing the return elastic force of the return spring 606.

[0046] Specifically, when the hydraulic oil stops flowing, the hydraulic oil no longer pushes up the oil inlet plate 4, so that the strong restoring force of the restoring spring 606 is released instantly, thereby causing the oil inlet plate 4 to quickly reset and re-block the oil inlet cylinder 3.

[0047] In an embodiment further provided by the present invention, a base 1 is further included, a through hole is provided on one side of the base 1, one end of the cylinder 203 is connected to the through hole, a sealing ring 201 is provided inside the same end of the cylinder 203, one end of the piston rod 2 passes through the sealing ring 201 and slides with the through hole, and an oil outlet 204 is connected on the side wall of the cylinder 203.

[0048] In an embodiment further provided by the present invention, a storage groove 501 is provided on one side of the top box 5, the storage groove 501 is connected to the linkage groove 502, the linkage rod 7 is slidably arranged in the storage groove 501, and one end of the linkage rod 7 is fixedly connected to the surface of one side of the connecting bar 6, and a retaining rail 701 is connected to the surface of one side of the base 1, and the surface of the linkage rod 7 slides with the inside of the retaining rail 701.

[0049] Furthermore, the linkage rod 7 is made of a reinforcing rib material so that the linkage rod 7 can transmit a larger force.

[0050] In an embodiment further provided by the present invention, the second locking assembly includes a locking ring 8 arranged on the surface of the piston rod 2, and an oil scraping groove 801 is provided on one side surface of the locking ring 8, and the oil scraping groove 801 is interference fit with the surface of the piston rod 2, and a connecting piece 802 is connected to the other side surface of the locking ring 8.

[0051] Furthermore, the oil scraping groove 801 abuts against the surface of the piston rod 2 , and scrapes the surface of the piston rod 2 when the piston rod 2 is extended or retracted, thereby scraping off the oil stains remaining on the surface of the piston rod 2 .

[0052] Furthermore, the oil scraper groove 801 is made of a material with strong friction, such as rubber or felt. When the locking ring 8 is driven to contract, the friction material on the oil scraper groove 801 is squeezed together and pressed on the surface of the piston rod 2 to form a huge friction force, thereby locking the piston rod 2.

[0053] In an embodiment further provided by the present invention, the second locking assembly also includes a linkage bar 702 fixedly connected to the other end of the linkage rod 7, and a limiting groove 703 is provided at one end of the linkage bar 702, and a linkage shaft 806 is slidably connected in the limiting groove 703, and the two ends of the linkage shaft 806 are connected to the second connecting seat 805, and one end of the second connecting seat 805 is connected to the first connecting seat 803, and the connecting member 802 is hinged inside the first connecting seat 803, and the same end surface of the second connecting seat 805 is also connected to the gathering shaft 804, and one end of the gathering shaft 804 is rotatably connected to the side surface of the base 1.

[0054] Furthermore, the limiting groove 703 is an arc-shaped groove, which is used to limit the movement direction of the linkage shaft 806.

[0055] Furthermore, the tightening shaft 804 is arranged at the bottom position of the second connecting seat 805, so that the second connecting seat 805 forms a force-saving lever structure, and the linkage bar 702 does not need to apply a lot of force to enable the second connecting seat 805 to have a strong tightening effect on the locking ring 8.

[0056] Specifically, when the oil inlet plate 4 rises and drives the connecting bar 6, it synchronously drives the linkage rod 7 to rise, thereby pulling the linkage bar 702, causing the linkage shaft 806 to slide in the limit groove 703, and then causing the second connecting seat 805 to rotate around the convergence shaft 804 as the axis, thereby pulling the connecting piece 802, so that the locking ring 8 is properly opened, and the oil scraping groove 801 is no longer squeezed, but only contacts the surface of the piston rod 2, scraping off the oil stains remaining on the surface of the piston rod 2.

[0057] Furthermore, when the hydraulic cylinder is not working and the oil inlet plate 4 falls back, the linkage shaft 806 is at the other end of the limit groove 703, the locking ring 8 is pressed against the surface of the piston rod 2, and the oil scraping groove 801 is contracted and squeezed together to lock the piston rod 2.

[0058] In an embodiment further provided by the present invention, an oil return cylinder 302 is connected to the upper surface of the lower portion of the base 1 , the upper end of the oil return cylinder 302 is connected to the lower end of the oil inlet cylinder 3 , and an oil return port 303 is connected on the side wall of the oil return cylinder 302 .

[0059] In an embodiment further provided by the present invention, a circular hole is provided at the upper end of the oil return cylinder 302, and an oil inlet rod 401 is connected to the lower end of the oil inlet plate 4. The oil inlet rod 401 slides in cooperation with the circular hole, and a first limiting ring 402 and a second limiting ring 403 are connected to the surface of the oil inlet rod 401.

[0060] Furthermore, the first limiting ring 402 is in the oil inlet cylinder 3, and its lower end abuts against the circular hole to limit the position of the oil inlet plate 4, so that the oil inlet plate 4 is in a position to block the oil inlet cylinder 3, and the second limiting ring 403 is in the oil return cylinder 302 below the circular hole to limit the rising distance of the oil inlet plate 4.

[0061] In an embodiment further provided by the present invention, an oil inlet 301 is connected to the side wall of the oil inlet cylinder 3 .

[0062] Furthermore, the interior of the cylinder 203 is divided into two chambers by the piston member 202. The left part connected to the piston rod 2 is the oil return chamber, which is filled with hydraulic oil in the initial state, and the right side is the oil inlet chamber, which is empty in the initial state.

[0063] In the present invention, first, hydraulic oil is introduced through the oil inlet 301. After the hydraulic oil fills the oil inlet cylinder 3, the oil inlet plate 4 is pushed up, causing the oil inlet plate 4 to rise, connecting the oil inlet cylinder 3 with the oil inlet chamber, allowing the hydraulic oil to enter the oil inlet chamber, thereby pushing the piston member 202, causing the piston rod 2 to extend to work, and pressurizing the hydraulic oil in the oil return chamber into the external oil tank; when the oil inlet plate 4 rises, it drives the connecting bar 6 and the second tooth plate 604 to slide upward in the linkage groove 502, thereby causing the driving gear 607 to rotate, thereby driving the first tooth plate 602 to move in the linkage groove 50 2 and slide downward in the contraction groove 601, thereby driving the first connecting block 603 and the second connecting block 605 to compress the return spring 606; when the oil inlet plate 4 rises and drives the connecting bar 6, it simultaneously drives the linkage rod 7 to rise, thereby pulling the linkage bar 702, causing the linkage shaft 806 to slide in the limiting groove 703, thereby causing the second connecting seat 805 to rotate with the contraction shaft 804 as the axis, thereby pulling the connecting piece 802, so that the locking ring 8 is properly opened, and the scraping groove 801 is no longer squeezed, but only contacts the surface of the piston rod 2, scraping away the residual When the hydraulic cylinder needs to hover and maintain its position, it only needs to stop the hydraulic oil from entering, and the hydraulic oil will no longer push up the oil inlet plate 4, so that the strong reset force of the reset spring 606 is released instantly, and the oil inlet plate 4 is quickly reset to block the oil inlet tube 3 again, so that the internal seal of the cylinder tube 203 is maintained and the piston rod 2 is locked. When the oil inlet plate 4 is quickly reset, the locking ring 8 is synchronously driven to be tightened, so that the locking ring 8 is pressed against the surface of the piston rod 2, and the friction material on the oil scraper groove 801 is squeezed together. When the hydraulic cylinder stops working and needs to be reset to the initial state, hydraulic oil is introduced into the return oil cylinder 302 through the return oil port 303 to lift the second limit ring 403, thereby causing the oil inlet plate 4 to rise, and then hydraulic oil is introduced through the return oil port 303 to compress the piston rod 2 to the right, so that the hydraulic oil in the oil inlet chamber is discharged, and the piston rod 2 is reset.

[0064] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A mechanical locking hydraulic cylinder assembly, comprising a cylinder barrel (203) and an oil inlet barrel (3) connected to one end of the cylinder barrel (203), characterized in that: The oil inlet cylinder (3) is slidably connected to an oil inlet plate (4), the cylinder (203) is slidably connected to a piston member (202), and one end of the piston member (202) is fixedly connected to a piston rod (2); It also includes a linkage rod (7), the upper end of the oil inlet plate (4) is connected to a first locking assembly, the surface of the piston rod (2) is provided with a second locking assembly, and the first locking assembly and the second locking assembly are connected via the linkage rod (7); When hydraulic oil is introduced into the oil inlet cylinder (3), the hydraulic oil pushes up the oil inlet plate (4) and then enters the cylinder (203) to push the piston member (202), so that the first locking assembly drives the second locking assembly to open and no longer lock the piston rod (2), thereby allowing the piston rod (2) to extend and scraping off dirt on the surface of the piston rod (2); When the hydraulic oil stops flowing in, the first locking assembly quickly drives the oil inlet plate (4) to reset and block the oil inlet cylinder (3), so that the cylinder (203) is sealed and pressure-maintained to lock the piston rod (2), and simultaneously drives the second locking assembly to tighten the piston rod (2) for mechanical locking; The first locking assembly comprises a connecting strip (6) fixedly connected to the upper end of the oil inlet plate (4), and one end of the linkage rod (7) is fixedly connected to a side surface of the connecting strip (6); The second locking assembly comprises a locking ring (8) arranged on the surface of the piston rod (2), and an oil scraping groove (801) is provided on one side of the surface of the locking ring (8), and the oil scraping groove (801) is interference-fitted with the surface of the piston rod (2), and a connecting piece (802) is connected to the other side of the surface of the locking ring (8); The second locking assembly also includes a linkage bar (702) fixedly connected to the other end of the linkage rod (7), and a limiting groove (703) is provided at one end of the linkage bar (702), and a linkage shaft (806) is slidably connected in the limiting groove (703), and the two ends of the linkage shaft (806) are connected to the second connecting seat (805), and one end of the second connecting seat (805) is connected to the first connecting seat (803), and the connecting member (802) is hinged inside the first connecting seat (803), and the same end surface of the second connecting seat (805) is also connected to a gathering shaft (804), and one end of the gathering shaft (804) is rotatably connected to a side surface of the base (1).

2. A mechanical locking hydraulic cylinder assembly according to claim 1, characterized in that: The invention also includes a top box (5), wherein a linkage groove (502) is provided in the top box (5), and a contraction groove (601) is provided at the upper end of the connecting bar (6), and a first tooth plate (602) is slidably connected in the contraction groove (601), and a second tooth plate (604) is also connected to the upper end of the connecting bar (6), and a driving gear (607) is rotatably connected in the linkage groove (502), and the first tooth plate (602) and the second tooth plate (604) are both engaged with the driving gear (607), and the connecting bar (6), the first tooth plate (602) and the second tooth plate (604) are all slidably matched with the linkage groove (502).

3. The mechanical locking hydraulic cylinder assembly according to claim 2, characterized in that: The first locking assembly further comprises a first connecting block (603) fixedly connected to the upper end of the first tooth plate (602), a second connecting block (605) fixedly connected to the upper end of the second tooth plate (604), and a return spring (606) connected between the first connecting block (603) and the second connecting block (605).

4. The mechanical locking hydraulic cylinder assembly according to claim 3, characterized in that: The invention also includes a base (1), wherein a through hole is provided on one side of the base (1), one end of the cylinder (203) is connected to the through hole, a sealing ring (201) is provided inside the same end of the cylinder (203), one end of the piston rod (2) passes through the sealing ring (201) and then slides in cooperation with the through hole, and an oil outlet (204) is connected on the side wall of the cylinder (203).

5. The mechanical locking hydraulic cylinder assembly according to claim 4, characterized in that: A receiving groove (501) is provided on one side of the top box (5), the receiving groove (501) is communicated with the linkage groove (502), the linkage rod (7) is slidably arranged in the receiving groove (501), a retaining track (701) is connected to the surface of one side of the base (1), and the surface of the linkage rod (7) is slidably matched with the inside of the retaining track (701).

6. The mechanical locking hydraulic cylinder assembly according to claim 1, characterized in that: An oil return cylinder (302) is connected to the upper surface of the lower portion of the base (1), the upper end of the oil return cylinder (302) is connected to the lower end of the oil inlet cylinder (3), and an oil return port (303) is connected to the side wall of the oil return cylinder (302).

7. The mechanical locking hydraulic cylinder assembly according to claim 6, characterized in that: A circular hole is provided at the upper end of the oil return cylinder (302), and an oil feed rod (401) is connected to the lower end of the oil feed plate (4). The oil feed rod (401) is slidably engaged with the circular hole, and a first limiting ring (402) and a second limiting ring (403) are connected to the surface of the oil feed rod (401).

8. The mechanical locking hydraulic cylinder assembly according to claim 7, characterized in that: An oil inlet (301) is connected to the side wall of the oil inlet cylinder (3).

Images