Separating type hydraulic jack with pressure gauge display function

Abstract

The utility model discloses a separating type hydraulic jack with a pressure gauge display function, which comprises an oil pump and an oil cylinder, an inlet end and an outlet end of the oil pump are respectively connected with a pressure gauge and a high-pressure oil pipe through a three-way joint, and the other end of the high-pressure oil pipe is connected with an inlet end and an outlet end of the oil cylinder through a two-way joint. A piston rod is arranged on the oil cylinder, a mounting groove is formed in the top end of the piston rod, a damping air cylinder is mounted at the bottom end of the inner side of the mounting groove, a buffer plate is arranged at the top end of the damping air cylinder, a second spring is arranged on the outer side of the outer wall of the damping air cylinder, and a connecting column is mounted at the top end of the buffer plate; a threaded column is arranged at the top end of the connecting column. According to the utility model, the instantaneous large impact force generated by a jacked object can be effectively absorbed and dispersed, and the situations that the piston rod is bent and broken or a sealing element of the oil cylinder is damaged and the like when instantaneous high load is applied to the piston rod due to sudden conditions such as center-of-gravity shift, accidental shaking and the like of the jacked object are avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of detachable hydraulic jacks, specifically a detachable hydraulic jack with a pressure gauge display function. Background Technology

[0002] A jack is a small lifting device that uses a rigid lifting component as its working device to lift heavy objects within a short stroke through a top support or bottom claw. Jacks are mainly used in factories, mines, transportation and other departments for vehicle repair and other lifting and supporting work. They are lightweight, sturdy, flexible and reliable, and can be carried and operated by one person. Among them, the split jack is a jack in which the power device and the support device are separated. It is divided into manual and electric types, both of which use hydraulic means and are used for lifting and supporting work.

[0003] A search revealed that patent publication number CN218810078U discloses a detachable hydraulic jack with a pressure gauge, comprising an oil pump and an oil cylinder. The oil pump is connected to the oil cylinder via a high-pressure oil pipe to provide power to the cylinder, causing the piston rod of the cylinder to move. A pressure gauge is also connected to the outlet of the oil pump and the high-pressure oil pipe via a tee connector. The high-pressure oil pipe has a multi-layer structure. The pressure gauge of this invention can be used to monitor whether the output pressure of the high-pressure oil pipe and the oil pump is normal. The multi-layer structure of the high-pressure oil pipe strengthens its strength and reduces the risk of leakage. The first steel wire restricts the expansion of the middle layer pipe after the high-pressure oil pipe is filled with oil, effectively protecting the oil pipe and preventing excessive internal pressure from damaging the inner and middle layers.

[0004] Existing detachable hydraulic jacks with pressure gauge displays can experience significant instantaneous forces on the piston rod of the cylinder when the object being lifted shifts its center of gravity, experiences external impacts, or other unforeseen events. These instantaneous impacts can deform the piston rod, damage the cylinder seals, or even cause the entire jack structure to fail. This not only affects the normal use of the equipment but can also pose serious safety hazards, resulting in personal injury and property damage. Therefore, a detachable hydraulic jack with a pressure gauge display is designed. Utility Model Content

[0005] In view of the defects or deficiencies of the separate hydraulic jack, the purpose of this utility model is to provide a separate hydraulic jack with a pressure gauge display function, which can effectively absorb and disperse the large instantaneous impact force generated by the object being lifted, and avoid the situation where the piston rod is bent, broken or the cylinder seal is damaged when the object being lifted is subjected to a sudden high load due to sudden conditions such as center of gravity shift or unexpected shaking.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a detachable hydraulic jack with a pressure gauge display function, including an oil pump and an oil cylinder. The inlet and outlet ends of the oil pump are connected to a pressure gauge and a high-pressure oil pipe respectively through a three-way connector. The other end of the high-pressure oil pipe is connected to the inlet and outlet ends of the oil cylinder through a two-way connector.

[0008] The cylinder is equipped with a piston rod, and the top end of the piston rod has an installation groove. A damping cylinder is installed at the bottom inner side of the installation groove. A buffer plate is installed at the top end of the damping cylinder. A second spring is installed on the outer side of the outer wall of the damping cylinder. A connecting post is installed at the top end of the buffer plate. A threaded post is installed at the top end of the connecting post. A top head is installed at the top end of the threaded post. A first spring is installed on the outer side of the outer wall between the connecting post and the threaded post.

[0009] Preferably, the outer circumferential wall of the buffer plate and the inner circumferential wall of the mounting groove are in clearance fit. Limiting blocks are arranged in a ring array on the outer circumferential wall of the buffer plate. The other end of the limiting block is installed in the limiting groove, and the outer wall of the limiting block and the groove wall of the limiting groove are in clearance fit. The limiting groove is arranged in a ring array on the inner circumferential wall of the mounting groove.

[0010] Preferably, the second spring is located between the bottom end of the buffer plate and the inner bottom end of the mounting groove.

[0011] Preferably, the bottom end of the threaded post is installed in a threaded hole, which is located at the center of the top of the connecting post.

[0012] Preferably, the first spring is located between the bottom end of the top head and the top end of the piston rod.

[0013] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0014] 1. In this utility model, through the coordinated arrangement of a series of structures, when the lifted object is subjected to a sudden high load due to a shift in the center of gravity or unexpected shaking, the damping cylinder, the second spring, the buffer plate, and other structures can effectively absorb and disperse the large instantaneous impact force generated by the lifted object, converting the impact force into other forms of energy for consumption. This significantly reduces the peak stress on the lifting head, piston rod, and cylinder, thereby preventing the piston rod from bending, breaking, or the cylinder seals from being damaged when the lifted object is subjected to a sudden high load due to a shift in the center of gravity or unexpected shaking. This improves the strength of the lifting structure of this utility model, extends its service life, and reduces equipment maintenance costs and downtime.

[0015] 2. In this utility model, through the coordinated arrangement of a series of structures, when the top head is subjected to heavy pressure or unexpected impact, the damping cylinder, the second spring, the buffer plate and other structures can effectively absorb and disperse the instantaneous force, avoiding the slippage phenomenon caused by stress concentration between the threaded column and the threaded hole on the piston rod. The first spring is in a compressed state, and the compressed first spring will generate radial force, which increases the friction between the threaded column and the threaded hole on the piston rod, further effectively preventing the slippage between the threaded column and the threaded hole on the piston rod. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the overall three-dimensional structure of this utility model. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the structure of the hydraulic cylinder of this utility model.

[0020] Figure 4 This is a cross-sectional view of the connection structure between the piston rod, buffer plate, and top head of this utility model.

[0021] In the picture:

[0022] 100. Oil pump;

[0023] 200. T-connector;

[0024] 300. Pressure gauge;

[0025] 400. High-pressure oil pipe;

[0026] 500, two-way connector;

[0027] 600, Hydraulic cylinder; 610, Piston rod; 611, Mounting groove; 612, Limiting groove; 620, First spring; 630, Top head; 631, Threaded post; 640, Connecting post; 641, Threaded hole; 650, Second spring; 660, Damping cylinder; 670, Buffer plate; 671, Limiting block. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] like Figure 1-4 As shown, a split hydraulic jack with pressure gauge display function includes an oil pump 100 and an oil cylinder 600. The inlet and outlet ends of the oil pump 100 are connected to a pressure gauge 300 and a high-pressure oil pipe 400 respectively via a three-way connector 200. The other end of the high-pressure oil pipe 400 is connected to the inlet and outlet ends of the oil cylinder 600 via a two-way connector 500. The oil pump 100 is connected to the oil cylinder 600 via the three-way connector 200, the high-pressure oil pipe 400, and the two-way connector 500 to provide power to the oil cylinder 600, causing the piston rod 610 of the oil cylinder 600 to move. The oil pressure gauge 300 is connected to the three-way connector 200. In use, the oil cylinder 600 is in the position of waiting. Below the object being lifted, the oil pump 100 is connected to the oil cylinder 600 via a three-way connector 200, a high-pressure oil pipe 400, and a two-way connector 500. This arrangement keeps the oil pump 100, the three-way connector 200, and the pressure gauge 300 away from the object being lifted, thus eliminating the risk of the pressure gauge 300 being damaged by the falling object. The pressure gauge 300 can be used to monitor whether the output pressure of the high-pressure oil pipe 400 and the oil pump 100 is normal. If, during use, the pressure gauge 300 experiences a sudden loss of pressure or the pressure value remains too low, it indicates that the high-pressure oil pipe 400 may be leaking, and its use should be stopped for inspection.

[0032] A piston rod 610 is provided on the hydraulic cylinder 600. The top end of the piston rod 610 is provided with a mounting groove 611. A damping cylinder 660 is installed at the bottom inner side of the mounting groove 611. A buffer plate 670 is provided at the top end of the damping cylinder 660. A second spring 650 is provided on the outer side of the outer wall of the damping cylinder 660. A connecting post 640 is installed at the top end of the buffer plate 670. A threaded post 631 is provided at the top end of the connecting post 640. A top head 630 is installed at the top end of the threaded post 631. A first spring 620 is provided on the outer side of the outer wall between the connecting post 640 and the threaded post 631.

[0033] The outer circumferential wall of the buffer plate 670 and the inner circumferential wall of the mounting groove 611 are in clearance fit. Limiting blocks 671 are arranged in a ring array on the outer circumferential wall of the buffer plate 670. The other end of the limiting block 671 is installed in the limiting groove 612, and the outer wall of the limiting block 671 and the groove wall of the limiting groove 612 are in clearance fit. The limiting groove 612 is arranged in a ring array on the inner circumferential wall of the mounting groove 611. Because the outer circumferential wall of the buffer plate 670 and the inner circumferential wall of the mounting groove 611 are in clearance fit, and the outer wall of the limiting block 671 and the groove wall of the limiting groove 612 are in clearance fit, the movement of the buffer plate 670 and the top head 630 can be limited and guided.

[0034] The second spring 650 is located between the bottom end of the buffer plate 670 and the inner bottom end of the mounting groove 611.

[0035] The bottom end of the threaded post 631 is installed in the threaded hole 641, which is located at the center of the top of the connecting post 640.

[0036] The first spring 620 is located between the bottom end of the top end of the top end of the top end of the top end of the top end of the piston rod 610.

[0037] Working Principle: In use, when the object being lifted applies a sudden high load to the lifting head 630 due to sudden changes in center of gravity or unexpected shaking, the damping cylinder 660, the second spring 650, and the buffer plate 670, in conjunction with these structures, effectively absorb and disperse the large instantaneous impact force generated by the object being lifted. This impact force is converted into other forms of energy and dissipated, significantly reducing the peak stress on the lifting head 630, piston rod 610, and hydraulic cylinder 600. This prevents the piston rod 610 from bending or breaking, or the hydraulic cylinder 600's seals from being damaged, when the object being lifted applies a sudden high load to the piston rod 610 due to sudden changes in center of gravity or unexpected shaking. This improves the lifting structure of this invention. The increased strength enhances service life, reduces equipment maintenance costs and downtime. When the top head 630 is subjected to heavy pressure or unexpected impact, the damping cylinder 660, the second spring 650, the buffer plate 670, and other structures can effectively absorb and disperse the instantaneous force, preventing stripping caused by stress concentration between the threaded column 631 and the threaded hole 641 on the piston rod 610. The first spring 620 is in a compressed state, and the compressed first spring 620 generates radial force, which increases the friction between the threaded column 631 and the threaded hole 641 on the piston rod 610, further effectively preventing stripping between the threaded column 631 and the threaded hole 641 on the piston rod 610.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the invention. For those skilled in the art, various modifications and variations can be made to this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A detachable hydraulic jack with a pressure gauge display function, comprising an oil pump (100) and an oil cylinder (600), characterized in that: The inlet and outlet ends of the oil pump (100) are connected to the pressure gauge (300) and the high-pressure oil pipe (400) respectively via a three-way connector (200), and the other end of the high-pressure oil pipe (400) is connected to the inlet and outlet ends of the oil cylinder (600) via a two-way connector (500). The cylinder (600) is provided with a piston rod (610), and the top end of the piston rod (610) is provided with an installation groove (611). A damping cylinder (660) is installed at the bottom inner side of the installation groove (611). A buffer plate (670) is provided at the top end of the damping cylinder (660). A second spring (650) is provided on the outer side of the outer wall of the damping cylinder (660). A connecting column (640) is installed at the top end of the buffer plate (670). A threaded column (631) is provided at the top end of the connecting column (640). A top head (630) is installed at the top end of the threaded column (631). A first spring (620) is provided on the outer side of the outer wall between the connecting column (640) and the threaded column (631).

2. The detachable hydraulic jack with pressure gauge display function according to claim 1, characterized in that: The outer circumferential wall of the buffer plate (670) and the inner circumferential wall of the mounting groove (611) are in clearance fit. Limiting blocks (671) are arranged in a ring array on the outer circumferential wall of the buffer plate (670). The other end of the limiting block (671) is installed in the limiting groove (612), and the outer wall of the limiting block (671) and the groove wall of the limiting groove (612) are in clearance fit. The limiting groove (612) is arranged in a ring array on the inner circumferential wall of the mounting groove (611).

3. The detachable hydraulic jack with pressure gauge display function according to claim 1, characterized in that: The second spring (650) is located between the bottom end of the buffer plate (670) and the inner bottom end of the mounting groove (611).

4. The detachable hydraulic jack with pressure gauge display function according to claim 1, characterized in that: The bottom end of the threaded post (631) is installed in the threaded hole (641), which is located at the center of the top of the connecting post (640).

5. The detachable hydraulic jack with pressure gauge display function according to claim 1, characterized in that: The first spring (620) is located between the bottom end of the top end (630) and the top end of the piston rod (610).

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