A self-locking hydraulic jack

Abstract

This utility model discloses a self-locking hydraulic jack, relating to the field of mechanical engineering technology. The utility model includes a base; a hydraulic jack body is fixedly connected to the upper surface of the base, and the output end of the hydraulic jack body is fixedly connected to another hydraulic jack body. Two self-locking components are symmetrically fixed to the outer wall of the hydraulic jack body. A replacement component is sleeved on the outer wall of the base. Each self-locking component includes a U-shaped plate, and a rack is slidably connected to the inner wall of the U-shaped plate. This utility model, through the mutual cooperation between the specific components of the self-locking assembly, avoids oil backflow in the hydraulic jack body, preventing damage to the hydraulic jack body and thus causing the piston rod in the hydraulic jack to fall back, leading to a safety accident. With the replacement component, it can lift objects of different shapes, improving the overall practicality and convenience of the device.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical engineering technology, and in particular relates to a self-locking hydraulic jack. Background Technology

[0002] A hydraulic jack, also known as a hydraulic jack, is a type of jack that uses a plunger or hydraulic cylinder as a rigid lifting component. It is a simple lifting device (common simple lifting devices include hydraulic jacks, pulleys, and winches). It is generally equipped with only a lifting mechanism to lift heavy objects. It has a simple structure, is lightweight, easy to carry, and convenient to move.

[0003] Existing hydraulic jacks are widely used in civil engineering jacking operations due to their large load-bearing capacity, serving as supports and providing prestress. However, due to numerous uncontrollable variables during civil construction and the prolonged load conditions required for the jacks, oil backflow is highly likely, potentially causing damage. This can lead to the piston rod falling back, resulting in safety accidents. To ensure the safety of hydraulic jacks, a self-locking hydraulic jack is needed. Therefore, we provide a self-locking hydraulic jack. Utility Model Content

[0004] The purpose of this invention is to provide a self-locking hydraulic jack to solve the problems described in the background section.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a self-locking hydraulic jack, including a base; a hydraulic jack body is fixedly connected to the upper surface of the base, a top seat is fixedly connected to the output end of the hydraulic jack body, two self-locking components are symmetrically fixed to the outer wall of the hydraulic jack body, and a replacement component is sleeved on the outer wall of the top seat.

[0006] The present invention is further configured such that the self-locking component includes a U-shaped plate, a rack is slidably connected to the inner wall of the U-shaped plate, two connecting rods connected to the side wall of the rack are symmetrically fixed to the outer wall of the top seat, an arc-shaped block is fixedly connected to the outer wall of the U-shaped plate, and a pawl that cooperates with the rack is rotatably provided on one side of the arc-shaped block.

[0007] The present invention is further configured such that the replacement component includes a connecting seat and a screw that passes through the top seat and the connecting seat respectively, the outer wall of the screw is threaded with a nut, and the top of the nut is fixedly connected with a V-shaped block.

[0008] The present invention is further configured such that a servo motor connected to a ratchet is fixedly connected to the other side of the outer wall of the arc-shaped block.

[0009] The present invention is further configured such that two arc-shaped grooves are symmetrically formed on the outer wall of the connecting seat to cooperate with the connecting rod.

[0010] The present invention is further configured such that a PLC controller is installed on the outer wall of the base, and the PLC controller is electrically connected to the servo motor.

[0011] This utility model has the following beneficial effects:

[0012] This invention, through the mutual cooperation between the specific components of the self-locking assembly, avoids the phenomenon of oil return in the hydraulic jack body, which would cause damage to the hydraulic jack body and cause the piston rod in the hydraulic jack to fall back, leading to a safety accident. With the help of replacement components, it can lift objects of different shapes, improving the overall practicality and convenience of the device. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a three-dimensional structural diagram of a self-locking hydraulic jack.

[0015] Figure 2 For the present utility model Figure 1 A partial structural breakdown diagram.

[0016] Figure 3 For the present utility model Figure 2 A. Enlarged schematic diagram of a local structure.

[0017] Figure 4 For the present utility model Figure 1 Schematic diagram of a partial structure.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Base; 2. Hydraulic jack body; 3. Top seat; 4. Connecting seat; 5. Screw; 6. Nut; 7. U-shaped plate; 8. Rack; 9. Arc block; 10. Pawl; 11. Servo motor; 12. PLC controller; 13. Arc groove; 15. V-block; 16. Connecting rod. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-4 This utility model is a self-locking hydraulic jack, including a base 1; a hydraulic jack body 2 is fixedly connected to the upper surface of the base 1, a top seat 3 is fixedly connected to the output end of the hydraulic jack body 2, two self-locking components are symmetrically fixed to the outer wall of the hydraulic jack body 2, and a replacement component is sleeved on the outer wall of the top seat 3.

[0022] The base 1 provides stable support for the entire device. The hydraulic jack body 2, which is fixed on the upper surface, is the core power source. Through the cooperation between the specific components of the self-locking assembly, the hydraulic jack body 2 is prevented from experiencing oil backflow, which could damage the hydraulic jack body 2 and cause the piston rod in the hydraulic jack to fall back, leading to a safety accident. With the help of replacement components, objects of different shapes can be lifted, improving the overall practicality and convenience of the device.

[0023] Please see Figures 1-4 The self-locking assembly includes a U-shaped plate 7, with a rack 8 slidably connected to the inner wall of the U-shaped plate 7. Two connecting rods 16 connected to the side walls of the rack 8 are symmetrically fixed to the outer wall of the top seat 3. An arc-shaped block 9 is fixedly connected to the outer wall of the U-shaped plate 7. A pawl 10 that works with the rack 8 is rotatably provided on one side of the arc-shaped block 9. A servo motor 11 connected to the pawl 10 is fixedly connected to the other side of the outer wall of the arc-shaped block 9. A PLC controller 12 is installed on the outer wall of the base 1. The PLC controller 12 is electrically connected to the servo motor 11.

[0024] Two connecting rods 16, symmetrically fixed to the outer wall of the top seat 3, are connected to the side wall of the rack 8. The rack 8 is slidably nested in the inner wall of the U-shaped plate 7, which is fixed to the outer wall of the hydraulic jack body 2. When the hydraulic jack body 2 drives the top seat 3 to rise or fall, the connecting rods 16 drive the rack 8 to rise and fall synchronously along the U-shaped plate 7. The teeth of the rack 8 provide a mechanical basis for locking. A pawl 10 is rotatably connected to one side of the arc-shaped block 9 fixed to the outer wall of the U-shaped plate 7. The pawl 10 is adapted to the teeth of the rack 8, and the tooth shape at the end of the pawl 10 is complementary to the teeth of the rack 8. The output shaft of the servo motor 11 on the other side is connected to... The pawl 10 is connected and provides power for its rotation. It is controlled by the PLC controller 12. After the top seat 3 rises to the target height, the PLC controller 12 instructs the servo motor 11 to drive the pawl 10 to rotate clockwise. The end of the pawl 10 engages with the teeth of the rack 8, preventing the rack 8 and the top seat 3 from sliding down through mechanical engagement, forming a rigid self-lock. When it is necessary to lower, the PLC controller 12 instructs the servo motor 11 to drive the pawl 10 to rotate counterclockwise. The pawl 10 disengages from the teeth of the rack 8 and is released from the lock. At this time, the hydraulic jack body 2 can lower the top seat 3 by depressurizing.

[0025] Please see Figure 2 The replacement components include a connecting seat 4 and a screw 5 that passes through the top seat 3 and the connecting seat 4 respectively. The outer wall of the screw 5 is threaded with a nut 6, and the top of the nut 6 is fixedly connected with a V-shaped block 15. The outer wall of the connecting seat 4 has two symmetrical arc-shaped grooves 13 that cooperate with the connecting rod 16.

[0026] The connecting seat 4 is sleeved on the outer wall of the top seat 3. The connecting seat 4 is fixed by the screw 5 passing through the through hole of the top seat 3 and the nut 6. The V-shaped block 15 fixed on the top of the nut 6 is used to directly contact the heavy object. Its V-shaped groove is suitable for lifting cylindrical workpieces, such as steel pipes and shaft parts. If it is necessary to lift flat heavy objects, the screw 5 and nut 6 can be unscrewed, the connecting seat 4 can be disassembled, and the flat contact of the top seat 3 can be used directly to achieve "one base and multiple fits".

[0027] The operation process of this embodiment is as follows: Two connecting rods 16 symmetrically fixed to the outer wall of the top seat 3 are connected to the side wall of the rack 8. The rack 8 is slidably nested in the inner wall of the U-shaped plate 7. The U-shaped plate 7 is fixed to the outer wall of the hydraulic jack body 2. When the hydraulic jack body 2 drives the top seat 3 to rise or fall, the connecting rods 16 drive the rack 8 to rise and fall synchronously along the U-shaped plate 7. The teeth of the rack 8 provide a mechanical basis for locking. A pawl 10 is rotatably connected to one side of the arc-shaped block 9 fixed to the outer wall of the U-shaped plate 7. The pawl 10 is adapted to the teeth of the rack 8. The tooth shape at the end of the pawl 10 is complementary to the teeth of the rack 8. The output shaft of the servo motor 11 on the other side is connected to the pawl 10 to provide power for the rotation of the pawl 10. It is uniformly controlled by the PLC controller 12. After the top seat 3 rises to the target height, the PLC controller 12 instructs the servo motor 11 to drive the rack 8. When the pawl 10 rotates clockwise, the end of the pawl 10 engages with the teeth of the rack 8, preventing the rack 8 and the top seat 3 from sliding down through mechanical engagement, forming a rigid self-locking mechanism. When descent is required, the PLC controller 12 instructs the servo motor 11 to drive the pawl 10 to rotate counterclockwise, disengaging the pawl 10 from the teeth of the rack 8 and releasing the lock. At this time, the hydraulic jack body 2 can release pressure to allow the top seat 3 to descend. The connecting seat 4 is sleeved on the outer wall of the top seat 3, and the screw 5 passes through the through hole between the top seat 3 and the connecting seat 4. The nut 6 is tightened to achieve fixation. The V-shaped block 15 fixed on the top of the nut 6 is used to directly contact the heavy object. Its V-groove is suitable for lifting cylindrical workpieces, such as steel pipes and shaft parts. If it is necessary to lift a flat heavy object, the screw 5 and the nut 6 can be unscrewed, the connecting seat 4 can be disassembled, and the flat contact of the top seat 3 can be used directly to achieve "one base with multiple fittings".

[0028] 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.

[0029] 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 self-locking hydraulic jack, comprising a base (1); characterized in that, A hydraulic jack body (2) is fixedly connected to the upper surface of the base (1). A top seat (3) is fixedly connected to the output end of the hydraulic jack body (2). Two self-locking components are symmetrically fixed to the outer wall of the hydraulic jack body (2). A replacement component is sleeved on the outer wall of the top seat (3).

2. A self-locking hydraulic jack according to claim 1, characterized in that, The self-locking assembly includes a U-shaped plate (7), a rack (8) is slidably connected to the inner wall of the U-shaped plate (7), two connecting rods (16) connected to the side wall of the rack (8) are symmetrically fixed to the outer wall of the top seat (3), an arc-shaped block (9) is fixedly connected to the outer wall of the U-shaped plate (7), and a pawl (10) that cooperates with the rack (8) is rotatably provided on one side of the arc-shaped block (9).

3. The self-locking hydraulic jack according to claim 1, wherein, The replacement component includes a connecting seat (4) and a screw (5) that passes through the top seat (3) and the connecting seat (4) respectively. The outer wall of the screw (5) is threaded with a nut (6), and a V-block (15) is fixedly connected to the top of the nut (6).

4. The self-locking hydraulic jack according to claim 2, wherein, A servo motor (11) connected to a pawl (10) is fixedly connected to the other side of the outer wall of the arc-shaped block (9).

5. A self-locking hydraulic jack according to claim 3, wherein The outer wall of the connecting seat (4) is symmetrically provided with two arc-shaped grooves (13) that cooperate with the connecting rod (16).

6. A self-locking hydraulic jack according to claim 4, wherein A PLC controller (12) is installed on the outer wall of the base (1), and the PLC controller (12) is electrically connected to the servo motor (11).

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