Hydraulic jack

Abstract

The utility model provides a hydraulic jack. The hydraulic jack comprises a bottle body, a lifting structure and a plurality of supporting legs. The bottle body is provided with an oil storage cavity and a main oil cavity which are mutually independent, the oil storage cavity and the main oil cavity can be communicated or blocked, a plurality of supporting cavities are formed in the bottom of the bottle body and communicated with the main oil cavity, and the oil storage cavity is used for storing hydraulic oil. The lifting structure is movably arranged in the main oil cavity and used for supporting foreign objects. The supporting legs correspond to the supporting cavities one to one, the supporting legs are movably arranged in the corresponding supporting cavities, and the positions of the supporting legs relative to the bottle body can be adjusted through the hydraulic oil. By means of the technical scheme, the problem that in the prior art, when a hydraulic jack is placed on an uneven working face or a working face with an inclined angle, stability becomes poor can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic jacks, in particular to a hydraulic jack. Background Art

[0002] Hydraulic jack is a tool used to lift heavy objects. It is easy to operate and is widely used in automobile maintenance, construction, cargo handling, industrial maintenance and emergency rescue, providing convenience and safety for various lifting and supporting tasks.

[0003] However, the working surface in some usage scenarios is uneven or has an inclination. When the hydraulic jack is placed on this working surface, the chassis of the hydraulic jack will be unevenly stressed, which will cause the hydraulic jack to tilt or even lose balance, resulting in poor stability of the hydraulic jack. This will also damage the hydraulic jack, shorten the service life of the hydraulic jack, and even cause the hydraulic jack to pop out and injure people, thereby causing heavy objects to overturn and increase safety hazards. Utility Model Content

[0004] The utility model provides a hydraulic jack to solve the problem in the prior art that the hydraulic jack has poor stability when placed on an uneven or inclined working surface.

[0005] The utility model provides a hydraulic jack, which includes: a bottle body, the bottle body having an oil storage chamber and a main oil chamber that are independent of each other, the oil storage chamber and the main oil chamber being able to be connected or blocked, a plurality of supporting chambers being provided at the bottom of the bottle body, the plurality of supporting chambers being connected to the main oil chamber, the oil storage chamber being used for storing hydraulic oil; a lifting structure, which is movably arranged in the main oil chamber, the lifting structure being used for supporting external objects; a plurality of support legs, which are provided in a one-to-one correspondence with the plurality of support chambers, the support legs being movably arranged in the corresponding support chambers, and the positions of the support legs relative to the bottle body being able to be adjusted by hydraulic oil.

[0006] Furthermore, there is a first channel and a second channel between the oil storage chamber and the main oil chamber, and the hydraulic jack also includes: a driving structure, the driving structure has a first connecting port and a second connecting port, one end of the first channel is connected to the oil storage chamber, the other end of the first channel is connected to the first connecting port, one end of the second channel is connected to the second connecting port, and the other end of the second channel is connected to the main oil chamber, the driving structure can drive the hydraulic oil to flow in the first channel and the second channel, and the second channel is connected to multiple support chambers; a control system, electrically connected to the driving structure, the driving structure can transmit signals to the control system, and the control system can control the operation of the driving structure.

[0007] Furthermore, a balancing hole is provided on the bottle body, the balancing hole is communicated with the oil storage cavity, and a vent valve is provided on the balancing hole to balance the pressure of the oil storage cavity and the outside world.

[0008] Furthermore, the vent valve includes: a first shell, the first shell has an air inlet cavity and an air outlet cavity that are independent of each other, a first valve port is provided in the air inlet cavity, and a second valve port is provided in the air outlet cavity; a first sealing member and a first elastic member, the first sealing member is movably provided at the first valve port, the first sealing member can block or open the first valve port, the first elastic member is provided on a side of the first sealing member close to the oil storage cavity, one end of the first elastic member abuts against the first sealing member, and the other end of the first elastic member abuts against the air inlet cavity; a second sealing member and a second elastic member, the second sealing member is movably provided at the second valve port, the second sealing member can block or open the second valve port, the second elastic member is provided on a side of the second sealing member away from the oil storage cavity, one end of the second elastic member abuts against the second sealing member, and the other end of the second elastic member abuts against the air outlet cavity.

[0009] Furthermore, the vent valve includes: a second shell, the second shell has a connecting cavity, and a third valve port is arranged in the middle of the connecting cavity; a third blocking member, which is slidably arranged at the third valve port, and the third blocking member can block or open the third valve port; a third elastic member, the third elastic member is located on one side of the third blocking member, one end of the third elastic member abuts against the third blocking member, and the other end of the third elastic member abuts against the connecting cavity; a fourth elastic member, the fourth elastic member is located on the other side of the third blocking member, one end of the fourth elastic member abuts against the third blocking member, and the other end of the fourth elastic member abuts against the connecting cavity.

[0010] Furthermore, a protective cover is provided at one end of the first shell away from the oil storage cavity. The protective cover is provided on the outside of the air inlet cavity and the air outlet cavity, and a plurality of through holes are provided on the protective cover.

[0011] Furthermore, the hydraulic jack also includes a weight meter, which is connected to the second channel and is used to detect the weight of the foreign object.

[0012] Furthermore, the lifting structure includes a plurality of pistons, which are arranged in sequence, and two adjacent pistons can slide against each other.

[0013] Furthermore, the lifting structure also includes a push rod, which is located in the innermost piston and is threadedly connected to the innermost piston.

[0014] Furthermore, a plurality of slots are provided on the top of the top rod, and a gasket is provided on the bottom of the supporting leg.

[0015] According to the technical solution of the present invention, the oil storage chamber is used to store hydraulic oil, and the lifting structure is arranged in the main oil chamber. The oil storage chamber and the main oil chamber are connected. When the hydraulic oil enters the main oil chamber from the oil storage chamber, the lifting structure rises. When the hydraulic oil enters the oil storage chamber from the main oil chamber, the lifting structure falls. When the oil storage chamber and the main oil chamber are disconnected, the height of the lifting structure remains unchanged to lift heavy objects. And because the support chamber is connected to the main oil chamber, the hydraulic oil enters the main oil chamber from the oil storage chamber, and the hydraulic oil can enter the support chamber. When encountering an uneven or inclined working surface, the legs that are suspended or supported by the working surface with less force will be pushed out, automatically increasing the force between them and the working surface, thereby achieving self-balancing of the pressure on each leg and ensuring that the center of gravity of the hydraulic jack does not deviate from its axis. Furthermore, when the hydraulic oil enters the oil reservoir from the main oil chamber, the extended length of all outriggers will not change during the falling process of the heavy object. Only when the hydraulic oil is about to be completely pumped back into the oil reservoir will all the outriggers be completely retracted into the support chamber under the action of negative pressure. This configuration provides the hydraulic jack with an adaptive balancing function, which improves its stability and enables it to adapt to different working surface environments, preventing it from tilting during the support process. This protects the hydraulic jack from damage, increases its service life, and improves its safety and reliability, thus preventing accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 The figure shows a schematic structural diagram of a hydraulic jack provided in the first embodiment of the present invention;

[0018] Figure 2 It shows a schematic structural diagram of the vent valve provided in the first embodiment of the present utility model;

[0019] Figure 3 The structure diagram of the vent valve provided in the second embodiment of the present invention is shown;

[0020] Figure 4 The structure diagram of the top cap provided in the first embodiment of the present invention is shown;

[0021] Figure 5 A schematic structural diagram of the supporting legs and gaskets provided in the first embodiment of the present invention is shown.

[0022] The above drawings include the following reference numerals:

[0023] 10. Bottle body;

[0024] 11. Oil storage chamber; 12. Main oil chamber; 13. Support chamber;

[0025] 14. First channel; 15. Second channel;

[0026] 16. Balance hole;

[0027] 20. Lifting structure;

[0028] 21. First-stage piston; 22. Second-stage piston; 23. Third-stage piston; 24. Fourth-stage piston;

[0029] 25, ejector pin; 251, top cap; 2511, slot;

[0030] 30. Outriggers;

[0031] 40. Drive structure;

[0032] 50. Vent valve;

[0033] 51. First shell;

[0034] 511, air inlet cavity; 5111, first valve port;

[0035] 512, air outlet cavity; 5121, second valve port;

[0036] 521, first blocking member; 522, first elastic member;

[0037] 531, second blocking member; 532, second elastic member;

[0038] 54. Second shell;

[0039] 541, communicating cavity; 5411, third valve port;

[0040] 551, third blocking member; 552, third elastic member; 553, fourth elastic member;

[0041] 56. Protective cover;

[0042] 60. Weight table;

[0043] 70. Gasket;

[0044] 80. Battery. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] like Figure 1 As shown, the first embodiment of the present invention provides a hydraulic jack, which includes a bottle body 10, a lifting structure 20 and a plurality of legs 30. The bottle body 10 has an oil storage chamber 11 and a main oil chamber 12 that are independent of each other. The oil storage chamber 11 and the main oil chamber 12 can be connected or blocked. A plurality of support chambers 13 are provided at the bottom of the bottle body 10. The plurality of support chambers 13 are connected to the main oil chamber 12. The oil storage chamber 11 is used to store hydraulic oil. The lifting structure 20 is movably arranged in the main oil chamber 12. The lifting structure 20 is used to support external objects. The plurality of legs 30 are arranged in a one-to-one correspondence with the plurality of support chambers 13. The legs 30 are movably arranged in the corresponding support chambers 13. The position of the legs 30 relative to the bottle body 10 can be adjusted by hydraulic oil.

[0047] According to the technical solution of the present application, the oil reservoir 11 is used to store hydraulic oil, and the lifting structure 20 is arranged in the main oil chamber 12. The oil reservoir 11 and the main oil chamber 12 are connected. When the hydraulic oil enters the main oil chamber 12 from the oil reservoir 11, the lifting structure 20 rises. When the hydraulic oil enters the oil reservoir 11 from the main oil chamber 12, the lifting structure 20 descends. When the oil reservoir 11 and the main oil chamber 12 are disconnected, the height of the lifting structure 20 remains unchanged to lift heavy objects. In addition, because the support chamber 13 is connected to the main oil chamber 12, the hydraulic oil enters the main oil chamber 12 from the oil reservoir 11, and the hydraulic oil can enter the support chamber 13. When encountering an uneven or inclined working surface, the support legs 30 that are suspended or have less support force from the working surface will be pushed out, automatically increasing the force between them and the working surface, thereby achieving self-balancing of the pressure on each support leg 30 and ensuring that the center of gravity of the hydraulic jack does not deviate from its axis. Furthermore, when the hydraulic oil enters the oil reservoir 11 from the main oil chamber 12, the extended lengths of all the legs 30 will not change during the falling process of the heavy object. Only when the hydraulic oil is about to be completely pumped back into the oil reservoir 11 will all the legs 30 be completely retracted into the support chamber 13 under the action of negative pressure. With this arrangement, the hydraulic jack has an adaptive balancing function, which improves the stability of the hydraulic jack and enables it to adapt to different working surface environments, preventing the hydraulic jack from tilting during the support process, thereby preventing damage to the hydraulic jack and increasing its service life. It also improves the safety and reliability of the hydraulic jack and prevents accidents.

[0048] Optionally, 4 to 6 legs 30 may be provided at the bottom of the bottle body 10 , and the legs 30 are evenly distributed.

[0049] Among them, in the present application, the support legs 30 can be completely retracted into the supporting frame, so that the support legs 30 do not occupy additional volume, reduce the volume of the hydraulic jack, and facilitate carrying the hydraulic jack.

[0050] Moreover, since the support chamber 13 is located at the bottom of the main oil chamber 12 , when the lifting structure 20 descends, the hydraulic oil in the main oil chamber 12 first returns to the oil storage chamber 11 , and the hydraulic oil in the support chamber 13 then returns to the oil storage chamber 11 .

[0051] Specifically, a first channel 14 and a second channel 15 are defined between the oil storage chamber 11 and the main oil chamber 12 .

[0052] The hydraulic jack also includes a drive structure 40 and a control system. The drive structure 40 has a first communication port and a second communication port. One end of a first channel 14 communicates with the oil reservoir 11, and the other end of the first channel 14 communicates with the first communication port. One end of a second channel 15 communicates with the second communication port, and the other end of the second channel 15 communicates with the main oil chamber 12. The drive structure 40 is capable of driving hydraulic oil to flow through the first channel 14 and the second channel 15. The second channel 15 communicates with the multiple support chambers 13.

[0053] The control system is electrically connected to the driving structure 40 . The driving structure 40 can transmit signals to the control system, and the control system can control the operation of the driving structure 40 .

[0054] In the existing technology, hydraulic jacks need to rely on external force when lifting, and workers often have to put themselves in dangerous situations and face the risk of being injured or killed by overturned or scattered heavy objects at any time.

[0055] However, in the present application, a control system is used to remotely control the operation of the drive structure 40, which can achieve long-distance and precise control of the height of the hydraulic jack, avoiding the safety risks faced by operators in close-range operation, and at the same time improving the efficiency of the hydraulic jack in lifting heavy objects.

[0056] Specifically, in the present application, the drive structure 40 is a pilot-operated high-pressure reversing solenoid valve. By controlling the power on and off of the pilot-operated high-pressure reversing solenoid valve, the flow direction of the hydraulic oil is controlled. That is, the hydraulic oil can flow from the oil reservoir 11 into the main oil chamber 12, and the hydraulic oil can also flow from the main oil chamber 12 into the oil reservoir 11. In addition, the pilot-operated high-pressure reversing solenoid valve can control the opening and closing of the first channel 14 and the second channel 15.

[0057] The hydraulic jack further includes a battery 80 , which is electrically connected to the driving structure 40 to supply power to the driving structure 40 .

[0058] Optionally, the drive structure 40 may also include a pump body and a control valve, which are arranged between the first channel 14 and the second channel 15. The pump body is connected to the oil storage chamber 11 and the control valve, and the control valve is connected to the main oil chamber 12. The pump body can drive the hydraulic oil to flow in the first channel 14 and the second channel 15, and the control valve can control the opening and closing of the first channel 14 and the second channel 15.

[0059] Furthermore, the bottle body 10 is provided with a balancing hole 16, which is connected to the oil reservoir 11. A vent valve 50 is provided on the balancing hole 16 to balance the pressure in the oil reservoir 11 with the external pressure. In this arrangement, the vent valve 50 can balance the pressure in the oil reservoir 11 and the external air pressure, ensuring the normal flow of hydraulic oil in the oil reservoir 11.

[0060] like Figure 2 As shown, the vent valve 50 includes a first housing 51 , a first blocking member 521 , a first elastic member 522 , a second blocking member 531 and a second elastic member 532 .

[0061] The first housing 51 has an air inlet cavity 511 and an air outlet cavity 512 that are independent of each other. A first valve port 5111 is provided in the air inlet cavity 511 , and a second valve port 5121 is provided in the air outlet cavity 512 .

[0062] The first blocking member 521 is movably arranged at the first valve port 5111, and the first blocking member 521 can block or open the first valve port 5111. The first elastic member 522 is arranged on a side of the first blocking member 521 close to the oil storage chamber 11. One end of the first elastic member 522 abuts against the first blocking member 521, and the other end of the first elastic member 522 abuts against the air intake chamber 511.

[0063] The second blocking member 531 is movably arranged at the second valve port 5121, and the second blocking member 531 can block or open the second valve port 5121. The second elastic member 532 is arranged on a side of the second blocking member 531 away from the oil storage chamber 11. One end of the second elastic member 532 abuts against the second blocking member 531, and the other end of the second elastic member 532 abuts against the air outlet chamber 512.

[0064] With the above structure, when the oil level in the oil storage chamber 11 drops, negative pressure is formed in the oil storage chamber 11. When the internal and external pressure difference is greater than the preset value F, the first elastic member 522 is compressed, the first sealing member 521 moves away from the first valve port 5111, the first valve port 5111 opens, and the outside air is sucked into the oil storage chamber 11 through the vent valve 50, thereby achieving a relative balance of pressure inside and outside the oil storage chamber 11; when the oil level in the oil storage chamber 11 rises, the air pressure in the oil storage chamber 11 increases. When the internal and external pressure difference is greater than the preset value F, the second elastic member 532 is compressed, the second sealing member 531 moves away from the second valve port 5121, the second valve port 5121 opens, and the compressed air in the oil storage chamber 11 is discharged through the vent valve 50, thereby achieving a relative balance of pressure inside and outside the oil storage chamber 11 again.

[0065] This arrangement improves the automation level of the vent valve 50, eliminating the need for manual venting and simplifying operation. Furthermore, the first and second sealing members 521, 531 can quickly respond to pressure inside and outside the oil reservoir 11, preventing damage to the hydraulic jack due to overpressure. Simultaneously, under the action of the first and second elastic members 522, 532, the first and second sealing members 521, 531 can tightly seal their respective valve ports, effectively preventing leakage of hydraulic oil when not in operation and preventing air from entering the oil reservoir 11 unless necessary, thereby maintaining the cleanliness and stability of the oil reservoir 11.

[0066] In the present application, the first blocking member 521 and the second blocking member 531 are spherical structures, and the first elastic member 522 and the second elastic member 532 are springs.

[0067] Specifically, a protective cover 56 is provided at one end of the first housing 51 away from the oil reservoir 11. The protective cover 56 covers the outside of the air inlet chamber 511 and the air outlet chamber 512 and is provided with a plurality of through-holes. The multiple through-holes in the protective cover 56 effectively filter impurities from the outside, preventing them from entering the air inlet chamber 511 and the air outlet chamber 512, thereby protecting the internal structure of the vent valve 50 from contamination. This ensures the normal operation of the vent valve 50 and extends its service life. It also maintains the cleanliness and stability of the oil reservoir 11, reducing equipment maintenance costs.

[0068] Furthermore, the hydraulic jack further includes a weight meter 60 , which is connected to the second channel 15 , and is used to detect the weight of the foreign object.

[0069] With such an arrangement, the weight meter 60 can calculate the tonnage of the weight borne by the hydraulic jack based on the internal oil pressure of the main oil chamber 12, the cross-sectional area, the piston's own weight, etc., and then the weight meter 60 can intuitively show the pressure of the weight of the unknown weight on the hydraulic jack. When it is displayed that the supporting force of the hydraulic jack is at its maximum tonnage limit, the lifting mechanism immediately stops rising, which can protect the hydraulic jack from damage and protect the safety of the staff.

[0070] The lifting structure 20 includes multiple pistons, which are arranged in a series, with adjacent pistons sliding against each other. This arrangement achieves a large lifting stroke and lifting force. When the hydraulic jack is not in operation, the multiple pistons can be retracted to their minimum size, making the jack more compact and easier to carry and store. The operator can control the rise of the pistons through the control system and drive structure 40.

[0071] Specifically, in the present application, the lifting structure 20 includes a first-stage piston 21, a second-stage piston 22, a third-stage piston 23 and a fourth-stage piston 24. The second-stage piston 22 is disposed in the first-stage piston 21, the third-stage piston 23 is disposed in the second-stage piston 22, and the fourth-stage piston 24 is disposed in the third-stage piston 23.

[0072] Furthermore, the lifting structure 20 includes a push rod 25, which is located within the innermost piston and is threadedly connected to the innermost piston. That is, the push rod 25 is located within the fourth-stage piston 24 and is threadedly connected to the fourth-stage piston 24. This arrangement allows the height of the lifting structure 20 to be precisely adjusted and further increases the height to which the lifting structure 20 can rise.

[0073] When the push rod 25 needs to be used, the staff can first adjust the position of the push rod 25 relative to the fourth-stage piston 24, and then place the hydraulic jack to the working position.

[0074] like Figure 4 and Figure 5 As shown, a plurality of slots 2511 are provided on the top of the top rod 25 , and a gasket 70 is provided on the bottom of the supporting leg 30 .

[0075] This arrangement can increase the friction between the push rod 25 and the lifted object, improve stability, and prevent the object from falling. At the same time, it can increase the friction between the support legs 30 and the working surface, preventing the hydraulic jack from shifting during the support process.

[0076] Specifically, the top of the push rod 25 has a top cap 251 , and the top cap 251 is provided with a slot 2511 .

[0077] Furthermore, in the present application, the gasket 70 is made of rubber.

[0078] like Figure 3 As shown, the second embodiment of the present invention provides a hydraulic jack, which differs from the first embodiment in that the vent valve 50 includes a second housing 54, a third blocking member 551, a third elastic member 552, and a fourth elastic member 553. The second housing 54 has a connecting cavity 541, with a third valve port 5411 disposed in the middle thereof. The third blocking member 551 is slidably disposed at the third valve port 5411, capable of blocking or opening the third valve port 5411. The third elastic member 552 is located on one side of the third blocking member 551, with one end abutting the third blocking member 551 and the other end abutting the connecting cavity 541. The fourth elastic member 553 is located on the other side of the third blocking member 551, with one end abutting the third blocking member 551 and the other end abutting the connecting cavity 541.

[0079] With the above structure, when the oil level in the oil storage chamber 11 drops, negative pressure is formed in the oil storage. When the internal and external pressure difference is greater than the preset value F, the fourth elastic member 553 is compressed, the third sealing member 551 moves away from the third valve port 5411, the third valve port 5411 opens, and the outside air is sucked into the oil storage chamber 11 through the vent valve 50, thereby achieving a relative balance of pressure inside and outside the oil storage chamber 11; when the oil level in the oil storage chamber 11 rises, the air pressure in the oil storage chamber 11 increases. When the internal and external pressure difference is greater than the preset value F, the third elastic member 552 is compressed, the third sealing member 551 moves away from the third valve port 5411, the third valve port 5411 opens, and the compressed air in the oil storage chamber 11 is discharged through the vent valve 50, thereby achieving a relative balance of pressure inside and outside the oil storage chamber 11 again.

[0080] In the present application, the third blocking member 551 includes a cylindrical sealing slider, which can block the third valve port 5411 . The upper and lower edges of the slider adopt a 45° chamfer design, which helps the slider to be smoothly embedded in the third valve port 5411 .

[0081] With such configuration, the vent valve 50 has a smaller size and a simpler structure, making it easier to assemble the vent valve 50 .

[0082] This arrangement improves the automation level of the vent valve 50, eliminating the need for manual venting and simplifying operation. Furthermore, the third sealing member 551 can quickly respond to pressure inside and outside the oil reservoir 11, preventing damage to the hydraulic jack due to overpressure. Simultaneously, under the action of the third elastic member 552 and the fourth elastic member 553, the third sealing member 551 can tightly seal the third valve port 5411, effectively preventing leakage of hydraulic oil when not in operation and preventing air from entering the oil reservoir 11 unless necessary, thereby maintaining the cleanliness and stability of the oil reservoir 11.

[0083] Furthermore, in the present application, a protective cover 56 is provided at one end of the second housing 54 away from the oil storage chamber 11. The protective cover 56 is provided on the outside of the communication chamber 541 and has multiple through holes. The multiple through holes in the protective cover 56 can effectively filter external impurities, prevent impurities from entering the communication chamber 541, and protect the internal structure of the vent valve 50 from contamination, thereby ensuring the normal operation of the vent valve 50 and extending the service life of the vent valve 50. At the same time, it also keeps the oil storage chamber 11 clean and stable, reducing equipment maintenance costs.

[0084] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0085] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0086] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0087] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0088] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A hydraulic jack, characterized in that: The hydraulic jack comprises: A bottle body (10), wherein the bottle body (10) has an oil storage chamber (11) and a main oil chamber (12) which are independent of each other, wherein the oil storage chamber (11) and the main oil chamber (12) can be connected or blocked, and a plurality of supporting chambers (13) are provided at the bottom of the bottle body (10), wherein the plurality of supporting chambers (13) are connected to the main oil chamber (12), and the oil storage chamber (11) is used for storing hydraulic oil; a lifting structure (20) movably disposed in the main oil chamber (12), the lifting structure (20) being used to support an external object; A plurality of supporting legs (30) are provided in one-to-one correspondence with the plurality of supporting cavities (13); the supporting legs (30) are movably provided in the corresponding supporting cavities (13); and the positions of the supporting legs (30) relative to the bottle body (10) can be adjusted by hydraulic oil.

2. The hydraulic jack according to claim 1, characterized in that: A first channel (14) and a second channel (15) are provided between the oil storage chamber (11) and the main oil chamber (12), and the hydraulic jack further comprises: A driving structure (40) having a first communication port and a second communication port, one end of the first channel (14) being in communication with the oil storage chamber (11), the other end of the first channel (14) being in communication with the first communication port, one end of the second channel (15) being in communication with the second communication port, the other end of the second channel (15) being in communication with the main oil chamber (12), the driving structure (40) being capable of driving hydraulic oil to flow in the first channel (14) and the second channel (15), the second channel (15) being in communication with the plurality of support chambers (13); The control system is electrically connected to the driving structure (40), and the driving structure (40) can transmit signals to the control system, and the control system can control the operation of the driving structure (40).

3. The hydraulic jack according to claim 2, characterized in that: The bottle body (10) is provided with a balancing hole (16), the balancing hole (16) is communicated with the oil storage chamber (11), and the balancing hole (16) is provided with a vent valve (50) to balance the pressure of the oil storage chamber (11) and the outside world.

4. The hydraulic jack according to claim 3, characterized in that: The vent valve (50) comprises: A first housing (51), the first housing (51) having an air inlet cavity (511) and an air outlet cavity (512) that are independent of each other, a first valve port (5111) being provided in the air inlet cavity (511), and a second valve port (5121) being provided in the air outlet cavity (512); a first blocking member (521) and a first elastic member (522), wherein the first blocking member (521) is movably disposed at the first valve port (5111), and the first blocking member (521) is capable of blocking or opening the first valve port (5111); the first elastic member (522) is disposed on a side of the first blocking member (521) close to the oil storage chamber (11); one end of the first elastic member (522) abuts against the first blocking member (521), and the other end of the first elastic member (522) abuts against the air inlet chamber (511); A second blocking member (531) and a second elastic member (532), wherein the second blocking member (531) is movably arranged at the second valve port (5121), and the second blocking member (531) is capable of blocking or opening the second valve port (5121), and the second elastic member (532) is arranged on a side of the second blocking member (531) away from the oil storage chamber (11), one end of the second elastic member (532) abuts against the second blocking member (531), and the other end of the second elastic member (532) abuts against the air outlet chamber (512).

5. The hydraulic jack according to claim 3, characterized in that: The vent valve (50) comprises: A second housing (54), the second housing (54) having a communication cavity (541), a third valve port (5411) being provided in the middle of the communication cavity (541); a third blocking member (551) slidably disposed at the third valve port (5411), the third blocking member (551) being capable of blocking or opening the third valve port (5411); a third elastic member (552), the third elastic member (552) being located on one side of the third blocking member (551), one end of the third elastic member (552) being in contact with the third blocking member (551), and the other end of the third elastic member (552) being in contact with the communicating cavity (541); A fourth elastic member (553), the fourth elastic member (553) is located on the other side of the third blocking member (551), one end of the fourth elastic member (553) abuts against the third blocking member (551), and the other end of the fourth elastic member (553) abuts against the communicating cavity (541).

6. The hydraulic jack according to claim 4, characterized in that: A protective cover (56) is provided at one end of the first housing (51) away from the oil storage cavity (11). The protective cover (56) is provided outside the air inlet cavity (511) and the air outlet cavity (512). A plurality of through holes are provided on the protective cover (56).

7. The hydraulic jack according to claim 2, characterized in that: The hydraulic jack further comprises a weight meter (60), the weight meter (60) being in communication with the second channel (15), and the weight meter (60) being used to detect the weight of the foreign object.

8. The hydraulic jack according to claim 1, characterized in that: The lifting structure (20) comprises a plurality of pistons, which are arranged in sequence, and two adjacent pistons can slide against each other.

9. The hydraulic jack according to claim 8, characterized in that: The lifting structure (20) further comprises a push rod (25), wherein the push rod (25) is located in the innermost piston and is threadedly connected to the innermost piston.

10. The hydraulic jack according to claim 9, characterized in that: The top of the push rod (25) is provided with a plurality of slots (2511), and the bottom of the supporting leg (30) is provided with a gasket (70).

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