Double self-locking hydraulic cylinder

Abstract

The utility model discloses a double self-locking hydraulic cylinder, and relates to the technical field of hydraulic cylinders and accessories thereof. The device comprises a base, a hydraulic cylinder is detachably and fixedly installed at the center of the base and comprises a piston rod, a rod groove is formed in the side wall of the shaft end of the piston rod, the piston rod is connected with a clamping assembly through the rod groove, the clamping assembly comprises a clamping plate clamped in the rod groove, and self-locking assemblies are further installed on the two sides of the hydraulic cylinder and on the base. The two ends of the first rotating rod are further rotationally connected with first shear rods, the second rotating rod is further rotationally connected with a second shear rod, the other end of the second shear rod is rotationally connected with a third rotating rod, and the third rotating rod is connected with the first rotating rod through a hydraulic rod. According to the self-locking hydraulic cylinder, the clamping assembly capable of being freely disassembled and assembled is clamped on the side wall of the shaft end of the piston rod, the shaft end of the piston rod is prevented from being shielded, meanwhile, the hydraulic cylinder can be subjected to a double-self-locking effect through cooperation of the two self-locking assemblies, the locking stability is improved, and meanwhile the self-locking hydraulic cylinder is simple in structure and long in service life.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic cylinders and their accessories, and in particular relates to a double self-locking hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. A hydraulic cylinder is basically composed of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a buffer device, and a venting device. Depending on the application scenario and operating conditions, other accessories are required when using a hydraulic cylinder, including a self-locking structure. The self-locking structure is used to assist in locking the hydraulic cylinder, which can better improve the stability of the hydraulic cylinder and prevent the piston rod from shifting due to damage to the hydraulic cylinder or other reasons.

[0003] A Chinese patent application (or patent) with publication number CN220268082U discloses a self-locking hydraulic cylinder, including a base plate. A body is fixedly connected to the upper surface of the base plate, and a top plate is fixedly connected to the top of the body. Symmetrical housings are placed on the upper surface of the base plate. Each housing has a through hole on its upper surface, and a battery is placed on the inner bottom wall of each housing. The upper surface of each battery contacts the inner top wall of the housing. This device, through the cooperation of a threaded rod and a threaded groove, can horizontally adjust the positioning plate, thereby self-locking the unfolded hydraulic cylinder. This prevents the device from easily becoming too rigid or breaking due to the inability to self-lock. The inclusion of a motor provides the necessary power for the adjustment process, preventing adjustment failure or unusability due to insufficient power. The inclusion of a battery stores the power required for the device's operation, improving its mobility.

[0004] The aforementioned self-locking hydraulic cylinder includes a motor, a threaded rod, and a positioning plate. The motor drives the threaded rod to rotate within the positioning plate, raising or lowering the height of the top plate. However, the positioning plate is positioned on both sides of the hydraulic cylinder, and the top plate is horizontally positioned across the top shaft end of the cylinder, which obstructs the cylinder and hinders its operation. Furthermore, the threaded rod is directly connected to the motor shaft, and the positioning plate is also mounted on the threaded rod, resulting in excessive pressure on the motor shaft end and making the motor highly susceptible to damage. Therefore, we provide a double self-locking hydraulic cylinder to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide a double self-locking hydraulic cylinder. By using a freely detachable clamping assembly to clamp the piston rod on the side wall of the shaft end, the shaft end of the piston rod is not obstructed. At the same time, the cooperation of two self-locking assemblies can achieve a double self-locking effect for the hydraulic cylinder, improving the stability of locking. In addition, its structure is simple and its service life is long, solving the problems of the aforementioned self-locking hydraulic cylinder.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a double self-locking hydraulic cylinder, comprising a base; a hydraulic cylinder is detachably fixedly installed at the center of the base, the hydraulic cylinder includes a piston rod, and a rod groove is formed on the side wall of the axial end of the piston rod. The piston rod is connected to a clamping assembly through the rod groove. The clamping assembly includes a clamping plate snapped into the rod groove, and a connecting plate is welded to the side wall of the clamping plate. The two clamping plates in the rod groove are connected by a screw. Self-locking assemblies are also installed on both sides of the hydraulic cylinder and on the base. The self-locking assembly includes a rotating rod 1 rotatably connected to the base, and shear rod 1 rotatably connected to both ends of the rotating rod 1. A rotating rod 2 rotatably connects to the other end of the shear rod 1, and shear rod 2 is rotatably connected to the rotating rod 2. A rotating rod 3 rotatably connects to the other end of the shear rod 2. The rotating rod 3 is connected to the rotating rod 1 through a hydraulic rod, and the rotating rod 3 is also connected to the connecting plate through a fixing plate.

[0008] The present invention is further configured such that a mounting hole is provided at the center of the base, and the mounting hole is fixedly connected to the fixing frame by bolts, and a hydraulic cylinder is snapped into the fixing frame.

[0009] The present invention is further configured such that a storage groove is provided on both sides of the mounting hole and on the base, and a shaft hole is provided on the inner wall of both sides of one end of the storage groove. The base is rotatably connected to the two shaft ends of the rotating rod in the self-locking assembly through the shaft hole.

[0010] The present invention is further configured such that the first shear bar is rotatably connected to the second shear bar via the second rotating rod, and a gap is provided between the second shear bar and the first shear bar. The third rotating rod on the top shaft end of the second shear bar is provided on the bottom side of the connecting plate, and the third rotating rod is parallel to the connecting plate.

[0011] The present invention is further configured such that both shaft ends of the rotating rod three are rotatably snapped with fixing plates, and the fixing plates are fixedly connected to the bottom side wall of the connecting plate by bolts.

[0012] The present invention is further configured such that each of the two shaft ends of the hydraulic rod is fitted with a mounting bracket, and the hydraulic rod is connected to a rotating plate one and a rotating plate two respectively through the mounting bracket. The rotating plate one is rotatably installed in the middle of the rotating rod one, and the rotating plate two is rotatably installed in the middle of the rotating rod three.

[0013] The present invention is further configured such that there are two clamping plates, which are respectively disposed on both sides of the piston rod, and the two shaft ends of the clamping plates are provided with round holes, and the clamping plates are connected to the screw through the round holes.

[0014] The present invention is further configured such that the two shaft ends of the screw are threadedly connected to threaded sleeves, and the threaded sleeves abut against the outer wall of the clamping plate, and the connecting plate and the base are arranged parallel to each other.

[0015] This utility model has the following beneficial effects:

[0016] This utility model features a clamping assembly consisting of two parts. The clamping plate of the clamping assembly is engaged with the rod groove on the shaft end of the piston rod of the hydraulic cylinder, and the two clamping plates are locked together by studs and sleeves. This achieves a locking assembly effect while exposing the shaft end of the piston rod of the hydraulic cylinder, allowing the shaft end of the piston rod to continue to be used and avoiding affecting the normal use of the hydraulic cylinder.

[0017] This invention features a self-locking assembly. Two sets of self-locking assemblies are located on either side of the hydraulic cylinder. Each set can operate independently or simultaneously, achieving a double self-locking effect and ensuring stable locking. Shear rod one and shear rod two within the self-locking assembly are rotatably connected. Shear rod one is rotatably connected to the base, while shear rod two is rotatably connected to the clamping plate in the clamping assembly. A hydraulic rod connects the bottom rotating rod one of shear rod one and the top rotating rod three of shear rod two. During use, the hydraulic rod extends, pushing shear rod one and shear rod two upwards, causing them to unfold. At this time, the clamping plate moves upwards, thus cooperating with the piston rod of the hydraulic cylinder to extend. Conversely, it retracts in conjunction with the piston rod of the hydraulic cylinder. After the hydraulic cylinder completes its extension or retraction, the hydraulic rod stops working, thereby locking the height of the hydraulic cylinder's piston rod.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a double self-locking hydraulic cylinder.

[0021] Figure 2 This is a structural disassembly diagram of the base and hydraulic cylinder.

[0022] Figure 3 This is a structural disassembly diagram of the clamping assembly.

[0023] Figure 4 This is a schematic diagram of the self-locking component.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1-Base, 101-Mounting hole, 102-Storage slot, 102a-Shaft hole, 2-Hydraulic cylinder, 201-Piston rod, 202-Rod groove, 203-Fixing bracket, 3-Clamping assembly, 301-Clamping plate, 301a-Round hole, 302-Connecting plate, 303-Screw, 304-Screw sleeve, 4-Self-locking assembly, 401-Rotating rod one, 402-Shear rod one, 403-Rotating rod two, 404-Shear rod two, 405-Rotating rod three, 406-Hydraulic rod, 406a-Mounting bracket, 407-Rotating plate one, 408-Rotating plate two, 409-Fixing plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1, please refer to Figure 1-3 This utility model is a double self-locking hydraulic cylinder, including a base 1, a hydraulic cylinder 2 and a clamping assembly 3. By using the clamping plate 301 in the clamping assembly 3, the side wall of the piston rod 201 shaft end can be clamped, which facilitates disassembly and assembly while avoiding obstruction of the piston rod 201 shaft end.

[0028] Specifically, a mounting hole 101 for mounting the hydraulic cylinder 2 is provided at the center of the upper side wall of the base 1. A rod groove 202 is provided on the side wall of the shaft end of the piston rod 201 on the hydraulic cylinder 2. The piston rod 201 is engaged with the clamping plate 301 in the clamping assembly 3 through the rod groove 202. A connecting plate 302 is welded on the outer wall of the clamping plate 301. The clamping plate 301 is arranged in a semi-circular ring structure.

[0029] Furthermore, the clamping plate 301 has round holes 301a at both ends, and a screw 303 is locked in the round hole 301a between the two clamping plates 301. The two shaft ends of the screw 303 are also threaded with screw sleeves 304. The mounting hole 101 is fixedly connected to the fixing frame 203 by bolts, and the hydraulic cylinder 2 is also locked in the fixing frame 203.

[0030] The operation process of this embodiment is as follows: When in use, align the clamping plate 301 with the rod groove 202 on the shaft end of the piston rod 201, and then abut it against it. Then take out another clamping plate 301 and connect it to the other side of the rod groove 202 of the piston rod 201. Then insert the screw 303 into the round hole 301a in one clamping plate 301 into the other clamping plate 301. While inserting the screw 303, ensure that the connecting plate 302 and the base 1 are parallel to each other. Then lock the screw sleeve 304 on both ends of the screw 303 until the screw sleeve 304 can no longer rotate.

[0031] Example 2, please refer to Figure 4 Based on embodiment 1, a self-locking assembly 4 is also provided. By utilizing the cooperation of shear rod 1 402, shear rod 2 404 and hydraulic rod 406 in the self-locking assembly 4, the height of the piston rod 201 can be locked by the action of the hydraulic cylinder 2.

[0032] Specifically, the mounting holes 101 of the base 1 are provided with storage slots 102 on both sides for mounting the self-locking assembly 4. The inner walls on both sides of one end of the storage slot 102 are provided with shaft holes 102a for rotating rod 401 of the self-locking assembly 4 to be rotatably connected. Shear rod 402 is rotatably connected to both ends of rotating rod 401. Rotating rod 403 is inserted through the other end of shear rod 402. Shear rod 404 is rotatably connected to the two shaft ends of rotating rod 403 and the inner side of shear rod 402. Rotating rod 405 is inserted through the shaft end of shear rod 404. Rotating rod 405 is connected to rotating rod 401 through a hydraulic rod 406.

[0033] Furthermore, mounting brackets 406a are fixedly installed on both ends of the hydraulic rod 406. The hydraulic rod 406 is fixedly connected to the first rotating plate 407 and the second rotating plate 408 respectively through the mounting brackets 406a at both ends. The first rotating plate 407 is rotatably connected to the middle of the first rotating rod 401, and the second rotating plate 408 is rotatably connected to the middle of the third rotating rod 405. Meanwhile, the third rotating rod 405 is also suspended and installed on the bottom side wall of the connecting plate 302 through the fixing plate 409.

[0034] The operation process of this embodiment is as follows: When the hydraulic cylinder 2 extends, that is, the piston rod 201 extends outward, the hydraulic rod 406 also extends in coordination. When the hydraulic rod 406 extends, since the height of the bottom shaft end of the hydraulic rod 406 cannot be changed, it can only push the rotating rod 405 on its shaft end to move upward. When the rotating rod 405 moves upward, the shear rod 402 and the shear rod 404 are extended and pulled upward. Then, when the piston rod 201 extends to the predetermined height position, it stops moving. At this time, the hydraulic rod 406 also stops moving and locks the state. At this time, the self-locking action of the hydraulic cylinder 2 is completed.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A double self-locking hydraulic cylinder, comprising a base (1); characterized in that: A hydraulic cylinder (2) is detachably fixed at the center of the base (1). The hydraulic cylinder (2) includes a piston rod (201) on it, and a rod groove (202) is provided on the side wall of the shaft end of the piston rod (201). The piston rod (201) is connected to the clamping assembly (3) through the rod groove (202). The clamping assembly (3) includes a clamping plate (301) snapped into the rod groove (202), and a connecting plate (302) is welded to the side wall of the clamping plate (301). The two clamping plates (301) in the rod groove (202) are connected by a screw (303). The hydraulic cylinder (2) is also mounted on both sides and on the base (1). The device is equipped with a self-locking assembly (4), which includes a rotating rod (401) rotatably connected to the base (1), and shear rod (402) rotatably connected to both ends of the rotating rod (401). The other end of the shear rod (402) is rotatably connected to a rotating rod (403), and shear rod (404) rotatably connected to the rotating rod (403). The other end of the shear rod (404) is rotatably connected to a rotating rod (405). The rotating rod (405) is connected to the rotating rod (401) via a hydraulic rod (406), and the rotating rod (405) is also connected to the connecting plate (302) via a fixing plate (409).

2. The double self-locking hydraulic cylinder according to claim 1, characterized in that, The base (1) has a mounting hole (101) at its center, and the mounting hole (101) is fixedly connected to the fixing frame (203) by bolts. A hydraulic cylinder (2) is snapped into the fixing frame (203).

3. A double self-locking hydraulic cylinder according to claim 2, characterized in that, Storage slots (102) are provided on both sides of the mounting hole (101) and on the base (1). Shaft holes (102a) are provided on the inner walls of both sides of one end of the storage slot (102). The base (1) is rotatably connected to the two shaft ends of the rotating rod (401) in the self-locking assembly (4) through the shaft holes (102a).

4. A double self-locking hydraulic cylinder according to claim 1, characterized in that, The first shear bar (402) is rotatably connected to the second shear bar (404) via the second rotating bar (403), and a gap is provided between the second shear bar (404) and the first shear bar (402). The third rotating bar (405) on the top shaft end of the second shear bar (404) is provided on the bottom side of the connecting plate (302), and the third rotating bar (405) and the connecting plate (302) are arranged parallel to each other.

5. A double self-locking hydraulic cylinder according to claim 1, characterized in that, The two shaft ends of the rotating rod three (405) are rotatably snapped with fixing plates (409), and the fixing plates (409) are fixedly connected to the bottom side wall of the connecting plate (302) by bolts.

6. A double self-locking hydraulic cylinder according to claim 1, characterized in that, The hydraulic rod (406) has mounting brackets (406a) attached to both shaft ends. The hydraulic rod (406) is connected to rotating plate one (407) and rotating plate two (408) respectively through the mounting brackets (406a). Rotating plate one (407) is rotatably installed in the middle of rotating rod one (401), and rotating plate two (408) is rotatably installed in the middle of rotating rod three (405).

7. A double self-locking hydraulic cylinder according to claim 1, characterized in that, There are two clamping plates (301). The two clamping plates (301) are respectively located on both sides of the piston rod (201), and the two shaft ends of the clamping plates (301) are provided with round holes (301a). The clamping plates (301) are connected to the screw rod (303) through the round holes (301a).

8. A double self-locking hydraulic cylinder according to claim 7, characterized in that, The two ends of the screw (303) are also threaded with a screw sleeve (304), and the screw sleeve (304) abuts against the outer wall of the clamping plate (301). The connecting plate (302) and the base (1) are arranged parallel to each other.

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