An ultra-high pressure thin hydraulic jack

Abstract

The utility model provides a kind of ultrahigh pressure thin hydraulic jack, to solve the structural strength deficiency and the problem of inconvenience of use of existing hydraulic jack under ultrahigh pressure working condition, mainly by cylinder body, main shaft and high pressure connector are composed, main shaft includes piston rod and piston, axially movably set in the inner chamber of cylinder body, oil cavity is equipped between cylinder body inner wall and main shaft, damper is between the outer wall of piston rod and the inner wall of cylinder body, base is fixed to the bottom end of cylinder body, high pressure connector is radially through the bottom side wall of cylinder body and is communicated with inner chamber, cylinder body side wall is equipped with the hydraulic oil inlet being communicated therewith, one end of piston rod is connected with bearing, other end is coaxially fixedly connected with piston, cylinder body outer wall is equipped with foldable handle, convenient operation and carrying, the utility model has excellent sealing performance, can withstand ultrahigh pressure, lifting force is strong, meet heavy lifting demand, small in size, light in weight, it is convenient to use in narrow space, and it has portability and practicality.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic jack technology, and in particular to an ultra-high pressure thin hydraulic jack. Background Technology

[0002] Hydraulic jacks are based on Pascal's principle, enabling them to generate enormous output force with a relatively small input force. In a hydraulic system, the force applied to the small piston is transmitted to the large piston through hydraulic oil. Since the area of ​​the large piston is much larger than that of the small piston, the output force is multiplied, allowing the hydraulic jack to easily bear greater weight. During the installation, maintenance, and handling of large equipment, hydraulic jacks can provide powerful lifting force to meet the needs of lifting, supporting, and positioning heavy objects.

[0003] The invention disclosed in application publication number CN103508369A is an "ultra-thin hydraulic jack", including a cylinder body, a cylinder head, and a piston rod. The bottom side wall of the cylinder body is provided with a high-pressure connector communicating with the inner cavity of the cylinder body. The bottom of the piston rod is sealed and slidably disposed in the inner cavity of the cylinder body, and the top of the piston rod is sealed and slidably connected to the cylinder head. The cylinder head encloses the top of the cylinder body. The bottom of the piston rod is provided with a spring cavity that communicates with the inner cavity of the cylinder body and is recessed into the piston rod. The top of the piston rod spring cavity is locked with a spring connector by a screw. One spring connector is connected to the upper end of the spring, and the lower end of the spring is locked with another spring connector connected to the bottom of the inner cavity of the cylinder body by a bolt. This invention has a simple structure, is convenient to use, and can effectively avoid the impact of piston rod retraction. It is safe to use and has a long service life. However, this utility model cannot withstand extremely high pressure. The jack is prone to problems such as cylinder body deformation and cracking during operation, which affects its service life and safety. It is difficult to withstand the huge stress brought by ultra-high pressure.

[0004] To improve the structural strength of jacks, a utility model with authorization announcement number CN205892625U discloses an "ultra-high pressure heavy-duty jack," comprising a high-pressure oil cylinder and a piston and an upper pressure cover that cooperate with the high-pressure oil cylinder. The piston is disposed inside the high-pressure oil cylinder, and the upper pressure cover is disposed on the top of the high-pressure oil cylinder and connected between the high-pressure oil cylinder and the piston. The bottom of the piston has at least one groove, and a high-pressure dynamic sealing ring is disposed in the groove. A guide ring is disposed between the bottom of the piston and the inner wall of the hydraulic oil cylinder, and the guide ring is fixedly connected to the piston. A first high-pressure static sealing ring is disposed between the pressure cover and the inner wall of the high-pressure oil cylinder, and a second high-pressure static sealing ring is disposed between the pressure cover and the piston. This jack is small in size and has a large load capacity, and can withstand the impact of high-pressure hydraulic oil. However, this utility model occupies a large space and has poor internal structure compactness, which cannot meet the special needs of use in confined spaces. This makes the jack less flexible in actual use, difficult to operate and move conveniently, and causes many inconveniences to users.

[0005] In summary, existing hydraulic jack devices typically have the following drawbacks: 1) Insufficient structural strength: Some existing hydraulic jack devices have structural strength design defects under ultra-high pressure conditions, which cannot withstand extremely high pressure. This causes the jack to be prone to cylinder deformation and cracking during operation, affecting its service life and safety, and making it difficult to withstand the huge stress brought by ultra-high pressure. 2) Inconvenience in use: Some existing thin hydraulic jacks are not reasonably designed in terms of internal space layout. They do not fully consider the thin design, occupy a large space, and have poor internal structure compactness. They cannot meet the special needs of use in narrow spaces, making the jacks less flexible in actual use and difficult to operate and move, causing many inconveniences to users. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art by proposing an ultra-high pressure thin hydraulic jack that can solve the problems of insufficient structural strength and inconvenience of use.

[0007] To achieve the above objectives, this utility model proposes an ultra-high pressure thin hydraulic jack, comprising a cylinder body, a main shaft, and a high-pressure connector. The main shaft is axially movably disposed within the inner cavity of the cylinder body; a stop ring is fixedly disposed between the cylinder bore and the outer wall of the main shaft; a main shaft top is provided at the top of the main shaft, which passes through the top of the cylinder body and extends to the outer side; the main shaft includes a piston rod and a piston, the piston rod being connected to the piston; a first oil chamber is provided between the inner wall of the cylinder body and the piston rod; a damper is disposed between the outer wall of the piston rod and the inner wall of the cylinder body; a base is fixedly connected to the bottom end of the cylinder body; the base has a buffer structure; a second oil chamber is provided between the base and the piston; the high-pressure connector radially penetrates the bottom side wall of the cylinder body and communicates with the inner cavity; a hydraulic oil inlet is provided on the side wall of the cylinder body; and the high-pressure connector is connected to the hydraulic oil inlet.

[0008] Preferably, a first sealing ring and a second sealing ring are provided between the cylinder body and the main shaft. The first sealing ring is embedded in an annular groove near the stop ring and is in close contact with the outer circumference of the piston rod. A second sealing ring is provided at the lower end of the inner wall of the cylinder body and is in close contact with the piston.

[0009] Preferably, the main shaft further includes a bearing, which is fixedly disposed at the lower end of the main shaft top. One end of the piston rod is connected to the bearing, and the other end of the piston rod is coaxially fixedly connected to the piston. The piston rod is provided with an annular protrusion, and the first spring is sleeved on the outer periphery of the annular protrusion. The piston includes a bolt, which axially penetrates the bottom of the piston cavity, and the second spring is coaxially sleeved on the bolt rod.

[0010] Preferably, the high-pressure connector includes a control valve, a ball check valve, and an oil supply pipe. The control valve is located at the port of the high-pressure connector. One end of the oil supply pipe is connected to the control valve, and the other end of the oil supply pipe is connected to the hydraulic oil inlet. The ball check valve is located inside the oil supply pipe, and the hydraulic oil inlet is connected to the first oil chamber and the second oil chamber.

[0011] Preferably, the spherical check valve includes a return spring and a steel ball. The steel ball is disposed in the cavity of the spherical check valve. One end of the return spring is fixedly connected to the base of the spherical check valve, and the other end of the return spring abuts against the steel ball.

[0012] Preferably, the high-pressure connector further includes a dust cap, which is threadedly connected to the high-pressure connector and is a detachable structure.

[0013] Preferably, the spindle further includes a pressure sensor, which is embedded in the top surface of the spindle shaft.

[0014] Preferably, the cylinder body has a handle on its outer wall, and the handle is foldable.

[0015] The beneficial effects of this utility model are: 1) Excellent sealing performance: It adopts a double sealing structure with a first sealing ring and a second sealing ring. The first sealing ring is embedded in the annular groove near the stop ring and fits tightly with the outer circumference of the piston rod; the second sealing ring is set at the lower end of the inner wall of the cylinder and fits tightly with the piston. This double sealing design greatly enhances the sealing between the cylinder and the main shaft, effectively prevents hydraulic oil leakage, ensures that the jack can maintain good working performance under ultra-high pressure conditions, and improves the reliability and service life of the equipment. 2) Enhanced lifting force: Through the structural design and size matching of the piston rod and piston, the piston rod is connected to the top of the main shaft through a bearing, and the other end is fixedly connected to the piston on the same axis. This stable connection method can effectively transmit the pressure of hydraulic oil to the main shaft, ensuring that the piston rod can transmit sufficient lifting force to the object being lifted, thereby easily completing the lifting operation, meeting the needs of lifting heavy objects under ultra-high pressure conditions, and expanding the application range of jacks; 3) Portable and practical: The damper is placed between the outer wall of the piston rod and the inner wall of the cylinder, and a second oil chamber is set between the base and the piston. The layout is reasonable and greatly reduces the overall size of the jack. It is convenient to use in confined spaces, such as car chassis repair and maintenance inside narrow equipment, which improves its applicability and flexibility. Under the premise of ensuring structural strength and performance, a lightweight design is adopted to reduce the weight of the jack, making it easy to carry and move, reducing the labor intensity of operators and improving work efficiency.

[0016] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a front view of the present invention; Figure 2 yes Figure 1 A schematic diagram of the high-pressure connector structure; Figure 3 This is a top view of the present invention.

[0018] Numbering in the diagram: 1-Cylinder body; 101-Stop ring; 102-First sealing ring; 2-Main shaft; 201-Main shaft top; 202-Bearing; 203-Piston rod; 204-Piston; 205-Annular protrusion; 206-First spring; 207-Bolt; 208-Second spring; 3-First oil chamber; 4-Second oil chamber; 5-Second sealing ring; 6-Damper; 7-Base; 701-Buffer structure; 8-High pressure connector; 801-Control valve; 802-Spherical check valve; 803-Reset spring; 804-Steel ball; 805-Dust cap; 9-Hydraulic oil inlet; 901-Oil pipe; 10-Pressure sensor; 11-Grip. Detailed Implementation

[0019] Example 1: See Figures 1 to 3 This utility model discloses an ultra-high pressure thin hydraulic jack, comprising a cylinder body 1, a main shaft 2, and a high-pressure connector 8, characterized in that: Figure 1 As shown, the main shaft 2 is axially movable within the cylinder body 1. The stop ring 101 is fixedly disposed between the cylinder port of the cylinder body 1 and the outer wall of the main shaft 2. The top of the main shaft 2 is provided with a main shaft top 201, which passes through the top of the cylinder body 1 and extends to the outside. The main shaft 2 includes a piston rod 203 and a piston 204. The piston rod 203 is connected to the piston 204. A first oil chamber 3 is provided between the inner wall of the cylinder body 1 and the piston rod 203. The damper 6 is disposed between the outer wall of the piston rod 203 and the inner wall of the cylinder body 1. The base 7 is fixedly connected to the bottom end of the cylinder body 1. The base 7 is provided with a buffer structure 701. A second oil chamber 4 is provided between the base 7 and the piston 204. Figure 2 As shown, the high-pressure connector 8 radially penetrates the bottom side wall of the cylinder body 1 and communicates with the inner cavity. The side wall of the cylinder body 1 is provided with a hydraulic oil inlet 9, and the high-pressure connector 8 is connected to the hydraulic oil inlet 9.

[0020] A first sealing ring 102 and a second sealing ring 5 are provided between the cylinder body 1 and the main shaft 2. The first sealing ring 102 is embedded in an annular groove near the stop ring 101 and is tightly fitted to the outer circumference of the piston rod 203. A second sealing ring 5 is provided at the lower end of the inner wall of the cylinder body 1 and is tightly fitted to the piston 204. The main shaft 2 also includes a bearing 202, which is fixedly disposed at the lower end of the main shaft top 201. One end of the piston rod 203 is connected to the bearing 202, and the other end of the piston rod 203 is coaxially fixedly connected to the piston 204. An annular protrusion 205 is provided on the piston rod 203, and a first spring 206 is sleeved on the outer circumference of the annular protrusion 205. The piston 204 includes a bolt 207, which axially penetrates the bottom of the inner cavity of the piston 204. A second spring 208 is coaxially sleeved on the rod of the bolt 207. The high-pressure connector 8 includes a control valve 80. 1. A ball check valve 802 and an oil supply pipe 901. The control valve 801 is located at the port of the high-pressure connector 8. One end of the oil supply pipe 901 is connected to the control valve 801, and the other end is connected to the hydraulic oil inlet 9. The ball check valve 802 is located inside the oil supply pipe 901. The hydraulic oil inlet 9 is connected to the first oil chamber 3 and the second oil chamber 4. The ball check valve 802 includes a return spring 803 and a steel ball 804. The steel ball 804 is located inside the ball check valve 802 cavity. One end of the return spring 803 is fixedly connected to the base of the ball check valve 802, and the other end of the return spring 803 abuts against the steel ball 804. The high-pressure connector 8 also includes a dust cap 805, which is threaded to the high-pressure connector 8 and is detachable. The spindle 2 also includes a pressure sensor 10, which is embedded in the upper surface of the spindle top 201. Figure 3 As shown, the outer wall of the cylinder body 1 is provided with a handle 11, which is a foldable structure.

[0021] In this embodiment, the cylinder body 1 adopts a streamlined elliptical cylinder design, the main shaft 2 adopts a coaxial design, and the connection between the piston rod 203 and the piston 204 adopts a threaded connection. The damper 6 is a cylindrical plunger structure, installed in the gap between the piston rod 203 and the cylinder body 1. The high-pressure connector 8 is designed as a right-angle interface for easy connection with common hydraulic oil pipes. The cylinder body 1 and the base 7 are made of high-strength alloy steel to ensure the overall structural strength and load-bearing capacity. The piston rod 203 and the piston 204 are made of high-hardness stainless steel, which has good wear resistance and corrosion resistance. The sealing rings and other rubber parts are made of oil-resistant rubber, which can maintain good sealing performance in the hydraulic oil environment for a long time.

[0022] This embodiment has a simple structure, relatively low production cost, and is easy to mass-produce and maintain. The components are highly versatile, making it easy to obtain and replace spare parts. It can meet the common needs of ultra-high pressure thin hydraulic jacks and is suitable for general industrial production, repair workshops, and construction sites. It can be used for routine lifting and supporting operations on small and medium-sized equipment and mechanical parts, such as chassis lifting in automobile repair and installation and debugging of small machine tools.

[0023] Example 2: This embodiment is basically the same as Embodiment 1, except that: the piston rod 203 of the main shaft 2 adopts a hollow structure design; the buffer structure 701 of the base 7 adopts an adjustable spring damping device, which can adjust the buffering effect according to different loads and working conditions; the cylinder body 1 and the base 7 are made of high-strength aluminum alloy, which has the characteristics of light weight and high strength; the piston rod 203 and piston 204 are made of titanium alloy, which further reduces the weight while maintaining good mechanical properties; the sealing ring and other rubber parts are made of high-performance fluororubber, which has better oil resistance, high temperature resistance and cold resistance; a retractable auxiliary support structure is added to the base 7. When in use, the support can be extended to increase the contact area between the jack and the ground and improve stability; when not in use, the support can be retracted without affecting the overall portability.

[0024] In this embodiment, the piston rod 203 of the main shaft 2 adopts a hollow structure design, which reduces its weight while ensuring its strength. It is lightweight, easy to carry and move, and is especially suitable for use in space-constrained places. It has a compact structure, reasonable layout, and high operational flexibility. It uses high-quality materials to ensure the durability and reliability of the product, and can maintain good performance in harsh working environments. It is suitable for scenarios that require operation in confined spaces, such as car rescue, field operations, and maintenance inside narrow equipment, such as quickly lifting the chassis of a vehicle during field vehicle repair, and inspecting and replacing local parts inside large machinery.

[0025] Example 3: This embodiment is basically the same as Embodiment 1, except that: the piston rod 203 of the main shaft 2 adopts a multi-stage telescopic structure, which can be retracted into the cylinder 1 when not in use to reduce the overall volume; when in use, it can be extended in multiple stages according to actual needs to achieve different lifting heights; the top of the piston 204 is designed with a special reinforcing rib structure to improve its load-bearing capacity and compressive strength; the high-pressure connector 8 is designed as a dual-interface type, which can connect two hydraulic oil pipes at the same time to achieve more efficient hydraulic oil delivery and control; a removable anti-slip pad is added to the base 7, and the surface of the pad has a special anti-slip texture and suction cup structure to better adhere to the ground.

[0026] In this embodiment, piston rod 203 and piston 204 are made of alloy steel, which further improves their surface hardness and wear resistance; rubber components such as sealing rings are made of special high-performance rubber formula, which has better resistance to compression and high pressure, strong load-bearing capacity, and can easily cope with the lifting requirements of heavy loads; the multi-stage telescopic piston rod design gives the jack a larger lifting range and flexibility; the use of anti-slip pads enhances the anti-slip performance of the jack under various ground conditions, especially on wet or slippery ground, which can effectively prevent the jack from slipping and improve the reliability and stability of the work; the dual-port high-pressure connector improves the efficiency and reliability of the hydraulic system and ensures the stable operation of the equipment under ultra-high pressure conditions.

[0027] Working principle: When hydraulic oil enters the jack from the hydraulic oil inlet 9 through the high-pressure connector 8, it flows sequentially through the oil supply pipe 901 and the ball check valve 802. The steel ball 804, under the action of the return spring 803, controls the oil flow unidirectionally through the control valve 801, and then flows into the first oil chamber 3 and the second oil chamber 4 respectively. Under the pressure of the hydraulic oil, the piston 204 drives the piston rod 203 and the connected main shaft 2 to overcome the resistance of the first spring 206 and the second spring 208, moving upwards to achieve the lifting function. During this process, the first sealing ring 102 and the second sealing ring 5 ensure the sealing between the cylinder body 1 and the main shaft 2, preventing hydraulic oil leakage. The damper 6 is located outside the piston rod 203. The wall between the piston and the inner wall of the cylinder 1 plays a role in stabilizing the piston movement and preventing the piston from rising too quickly; the pressure sensor 10 can monitor the pressure at the top of the spindle 201 in real time; the handle 11 is easy for the operator to hold and can be folded to save space; the dust cap 805 protects the high-pressure connector 8 from dust and other impurities; when the load needs to be lowered, the hydraulic oil is returned by controlling the control valve 801 at the high-pressure connector 8, and the piston 204 slowly descends under its own weight and the action of the second spring 208. The buffer structure 701 on the base 7 effectively absorbs the impact force when the piston descends, achieving a smooth descent, while the stop ring 101 limits the axial movement range of the spindle 2 to prevent it from overextending or retracting.

[0028] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A high-pressure thin-film hydraulic jack, comprising a cylinder body (1), a main shaft (2), and a high-pressure connector (8), characterized in that: The main shaft (2) is axially movable within the inner cavity of the cylinder body (1). A stop ring (101) is fixedly disposed between the cylinder port of the cylinder body (1) and the outer wall of the main shaft (2). The top of the main shaft (2) is provided with a main shaft top (201), which passes through the top of the cylinder body (1) and extends to the outside. The main shaft (2) includes a piston rod (203) and a piston (204). The piston rod (203) is connected to the piston (204). A first stop ring is provided between the inner wall of the cylinder body (1) and the piston rod (203). The oil chamber (3) and the damper (6) are located between the outer wall of the piston rod (203) and the inner wall of the cylinder (1). The base (7) is fixedly connected to the bottom end of the cylinder (1). The base (7) is provided with a buffer structure (701). The base (7) and the piston (204) are provided with a second oil chamber (4). The high pressure connector (8) penetrates the bottom side wall of the cylinder (1) radially and communicates with the inner cavity. The side wall of the cylinder (1) is provided with a hydraulic oil inlet (9). The high pressure connector (8) is connected to the hydraulic oil inlet (9).

2. The ultra-high pressure thin hydraulic jack as described in claim 1, characterized in that: A first sealing ring (102) and a second sealing ring (5) are provided between the cylinder (1) and the main shaft (2). The first sealing ring (102) is embedded in the annular groove near the stop ring (101). The first sealing ring (102) is in close contact with the outer circumference of the piston rod (203). A second sealing ring (5) is provided at the lower end of the inner wall of the cylinder (1). The second sealing ring (5) is in close contact with the piston (204).

3. The ultra-high pressure thin hydraulic jack as described in claim 1, characterized in that: The main shaft (2) also includes a bearing (202), which is fixedly installed at the lower end of the main shaft top (201). One end of the piston rod (203) is connected to the bearing (202), and the other end of the piston rod (203) is coaxially fixedly connected to the piston (204). The piston rod (203) is provided with an annular protrusion (205), and a first spring (206) is sleeved on the outer periphery of the annular protrusion (205). The piston (204) includes a bolt (207), which axially penetrates the bottom of the inner cavity of the piston (204), and a second spring (208) is coaxially sleeved on the rod of the bolt (207).

4. The ultra-high pressure thin hydraulic jack as described in claim 1, characterized in that: The high-pressure connector (8) includes a control valve (801), a ball check valve (802), and an oil supply pipe (901). The control valve (801) is located at the port of the high-pressure connector (8). One end of the oil supply pipe (901) is connected to the control valve (801), and the other end of the oil supply pipe (901) is connected to the hydraulic oil inlet (9). The ball check valve (802) is located inside the oil supply pipe (901), and the hydraulic oil inlet (9) is connected to the first oil chamber (3) and the second oil chamber (4).

5. The ultra-high pressure thin hydraulic jack as described in claim 4, characterized in that: The ball check valve (802) includes a return spring (803) and a steel ball (804). The steel ball (804) is disposed in the cavity of the ball check valve (802). One end of the return spring (803) is fixedly connected to the base of the ball check valve (802), and the other end of the return spring (803) abuts against the steel ball (804).

6. The ultra-high pressure thin hydraulic jack as described in claim 1, characterized in that: The high-pressure connector (8) also includes a dust cap (805), which is threadedly connected to the high-pressure connector (8) and is a detachable structure.

7. The ultra-high pressure thin hydraulic jack as described in claim 1, characterized in that: The spindle (2) also includes a pressure sensor (10), which is embedded in the upper surface of the spindle top (201).

8. The ultra-high pressure thin hydraulic jack as described in claim 1, characterized in that: The cylinder body (1) has a handle (11) on its outer wall, and the handle (11) is a foldable structure.

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