Hydraulic jack convenient to adjust

Abstract

The utility model discloses a hydraulic jack convenient to adjust, and relates to the technical field of hydraulic jacks. The hydraulic jack comprises a jack cylinder body and a hydraulic adjusting device, the hydraulic adjusting device can control hydraulic pressure in the jack cylinder body, a jacking plate is hinged to the top of the output end of the jack cylinder body, and a supporting assembly and a limiting assembly are arranged at the bottom of the jacking plate. The hydraulic adjusting device is used for controlling the output end of the jack cylinder body to slowly jack up an object located on the jacking plate, the first supporting rod and the second supporting rod of the supporting assembly are lifted upwards at the same time along with the lifting of the jacking plate, and in the lifting process of the second supporting rod, the object is lifted upwards. The spring continuously abuts against the rack on the second supporting rod and the rack on the jack cylinder body, the second supporting rod is limited to move downwards, and when an object inclines or the edge of the jacking plate is pressed by the self weight of the object, the edge of the jacking plate is supported by the first supporting rod and the second supporting rod, and the jacking plate is prevented from inclining or being damaged.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic jacks, specifically, it relates to an easily adjustable hydraulic jack. Background Technology

[0002] A hydraulic jack is a tool that uses hydraulic oil as its working medium and achieves lifting and jacking functions based on Pascal's principle. In daily use, the lifting end of a hydraulic jack often only has a single flat structure. Under unstable contact conditions, the object on top is prone to slipping. In rainy weather and on muddy outdoor ground, the existing load-bearing surface is fixed, making it easy for the jack to tip over on wet and slippery ground, further increasing the likelihood of the object on top slipping and making it inconvenient for prolonged use.

[0003] Chinese patent CN215626422U discloses an adjustable hydraulic jack. By incorporating a support plate and a detachable lifting plate, the detachable lifting plate can be adjusted according to the shape of the contact surface of the object being lifted, thereby reducing the impact of uneven surfaces and improving overall stability. The bottom-mounted positioning grip increases the overall pressure area, improving the uniformity of soil deformation under pressure and enhancing overall stability, while reducing the possibility of slippage. However, during use, the contact area between the detachable lifting plate and the object needs to be increased to prevent damage due to variations in the weight and size of the object. If the detachable lifting plate is too wide, the weight of the object can easily cause it to protrude from the edge of the support plate, pressing downwards and deforming it, leading to tilting or damage.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a hydraulic jack that is easy to adjust, thus solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] An easily adjustable hydraulic jack includes: a jack cylinder and a hydraulic adjustment device. The hydraulic adjustment device controls the hydraulic pressure inside the jack cylinder. A lifting plate is hinged to the top of the output end of the jack cylinder. A support assembly and a limiting assembly are provided at the bottom of the lifting plate. The support assembly includes a first support rod, a second support rod, and two limiting plates. One end of the first support rod is hinged to the bottom edge of the lifting plate, and the other end is hinged to one end of the second support rod. The two limiting plates are fixed to the outer wall of the jack cylinder. The second support rod is slidably connected between the two limiting plates. A rack is provided on the side of the second support rod opposite to the jack cylinder. The limiting assembly includes a slider, a limiting rod, and a spring. The two limiting plates have grooves for the slider to slide up and down. The limiting rod is slidably inserted into the slider and hinged to the second support rod. The spring is wrapped around the limiting rod, and both ends of the spring abut against the slider and the second support rod, respectively.

[0008] Optionally, both the support components and the limiting components are arranged in two sets and symmetrically on the jack cylinder.

[0009] Optionally, the limit rod is provided with a fixed protrusion, and the spring abuts against the fixed protrusion and the slider respectively.

[0010] Optionally, a mounting block is provided at the hinge point between the lifting plate and the output end of the jack cylinder. One side of the mounting block is fixed to the output end of the jack cylinder, and the other side is hinged to the lifting plate.

[0011] Optionally, a threaded adjusting rod is provided at the fixed position of the mounting block and the output end of the jack cylinder. One end of the threaded adjusting rod is threadedly connected to the output end of the jack cylinder, and the other end is embedded in the mounting block and rotatably connected to the mounting block.

[0012] Optionally, a locking component is rotatably connected to the outside of the slider, and a groove adapted to the locking component is provided on the portion of the limiting rod located between the slider and the second support rod.

[0013] Optionally, the lifting plate may be fitted with an anti-slip strip on the side that contacts the item.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0015] 1. By continuously engaging the rack on the second support rod with the rack on the jack cylinder through the spring, the downward movement of the second support rod is restricted. When the object tilts or the lifting plate is pressed against the edge of the lifting plate by its own weight, the first support rod supports the edge of the lifting plate because the rack on the second support rod is engaged with the rack on the jack cylinder. This solves the problem in existing systems where the weight of the object easily presses the edge of the detachable lifting plate out of the support sleeve downward, causing it to deform and resulting in tilting or damage to the detachable lifting plate.

[0016] 2. An installation block is provided at the hinge point between the lifting plate and the output end of the jack cylinder. One side of the installation block is fixed to the output end of the jack cylinder, and the other side is hinged to the lifting plate. If the limit plate wears out after long-term use, the installation block can be disassembled from the hinge of the lifting plate and the limit plate can be replaced.

[0017] 3. A threaded adjusting rod is provided at the fixed position of the mounting block and the output end of the jack cylinder. One end of the threaded adjusting rod is threadedly connected to the output end of the jack cylinder, and the other end is embedded in the mounting block and rotatably connected to the mounting block. In use, the distance of the threaded adjusting rod extending out of the output end of the jack cylinder can be adjusted by rotating the threaded adjusting rod, thereby increasing the platform height range of the object.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] In the picture:

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the side view structure;

[0023] Figure 3 A schematic diagram of the connection structure between the support component and the limiting component;

[0024] Figure 4 This is a partial structural diagram;

[0025] Figure 5 This is a schematic diagram of the jack cylinder body.

[0026] Figure 6 This is a schematic diagram of the limit rod.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Jack cylinder body; 2. Hydraulic adjustment device; 3. Lifting plate; 4. First support rod; 5. Second support rod; 6. Limiting plate; 7. Rack; 8. Slider; 9. Limiting rod; 10. Spring; 11. Slide groove; 12. Fixing protrusion; 13. Mounting block; 14. Threaded adjusting rod; 15. Locking component; 16. Groove; 17. Anti-slip strip.

[0029] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] See also Figure 1-6 As shown, this embodiment provides an easily adjustable hydraulic jack, including: a jack cylinder 1 and a hydraulic adjustment device 2. The hydraulic adjustment device 2 can control the hydraulic pressure inside the jack cylinder 1. It should be noted that hydraulic pressure control technology is a mature technology in the field, so it will not be described in detail. A lifting plate 3 is hinged to the top of the output end of the jack cylinder 1. The bottom of the lifting plate 3 is provided with a support assembly and a limiting assembly. It should be noted that there can be multiple sets of support assemblies and limiting assemblies, which are distributed in a circular array at intervals on the outside of the jack cylinder 1. The support assembly includes a first support rod 4, a second support rod 5, and two limiting plates 6. One end of the first support rod 4 is hinged to the bottom edge of the lifting plate 3, and the other end is hinged to one end of the second support rod 5. Two limiting plates 6 are fixed to the outer wall of the jack cylinder 1. The second support rod 5 is slidably connected between the two limiting plates 6. The second support rod 5 is provided with a rack 7 on the side opposite to the jack cylinder 1. The limiting assembly includes a slider 8, a limiting rod 9 and a spring 10. The two limiting plates 6 are provided with a sliding groove 11 for the slider 8 to slide up and down. The limiting rod 9 is slidably inserted into the slider 8 and hinged to the second support rod 5. The spring 10 is wrapped around the limiting rod 9. The two ends of the spring 10 are respectively pressed against the slider 8 and the second support rod 5.

[0032] When the adjustable hydraulic jack is needed, the hydraulic adjustment device 2 controls the output end of the jack cylinder 1 to slowly lift the object on the lifting plate 3. As the lifting plate 3 rises, the first support rod 4 and the second support rod 5 of the support assembly rise simultaneously. During the rise of the second support rod 5, the spring 10 continuously abuts the rack 7 on the second support rod 5 against the rack 7 on the jack cylinder 1, restricting the downward movement of the second support rod 5. When the object tilts or the lifting plate 3 is pressed against the edge of the lifting plate 3 by the weight of the object, the rack 7 on the second support rod 5 abuts against the rack 7 on the jack cylinder 1, thereby preventing the lifting plate 3 from tilting and increasing the support for the edge of the lifting plate 3. This solves the problem in the existing system where the weight of the object easily presses the edge of the detachable lifting plate 3 protruding from the support sleeve downward, causing it to deform and resulting in the detachable lifting plate 3 tilting or being damaged.

[0033] When in use, the lifting plate 3 is generally rectangular. The rectangular lifting plate 3 can provide good support for most items. The rectangular lifting plate 3 usually needs to support two edges. Therefore, the support components and the limiting components are set as two sets and symmetrically arranged on the jack cylinder 1. The two edges of the rectangular lifting plate 3 are supported by the cooperation of the support components and the limiting components.

[0034] During the upward movement driven by the second support rod 5, the limiting rod 9 is hinged to the second support rod 5, and an angle is formed between the limiting rod 9 and the second support rod 5, causing the spring 10 to tilt on the limiting rod 9, affecting the stability of the spring force of the spring 10. A fixed protrusion 12 is provided on the limiting rod 9, so that the spring 10 abuts against the fixed protrusion 12 and the slider 8 respectively.

[0035] An installation block 13 is provided at the hinge of the lifting plate 3 and the output end of the jack cylinder 1. One side of the installation block 13 is fixed to the output end of the jack cylinder 1, and the other side is hinged to the lifting plate 3. If the limit plate 6 wears out after long-term use, the installation block 13 can be disassembled from the lifting plate 3 and the limit plate 6 can be replaced.

[0036] During use, due to the limited length of the output end of the jack cylinder 1, the height at which the object can be raised is affected by the length of the output end. When the height of the object to be raised exceeds the length of the output end, it may be necessary to place a height-increasing pad at the bottom of the jack cylinder 1, which affects the efficiency of use. Therefore, a threaded adjusting rod 14 is provided at the fixed position between the mounting block 13 and the output end of the jack cylinder 1. One end of the threaded adjusting rod 14 is threadedly connected to the output end of the jack cylinder 1, and the other end is embedded in the mounting block 13 and rotatably connected to the mounting block 13. During use, the distance of the threaded adjusting rod 14 extending from the output end of the jack cylinder 1 can be adjusted by rotating the threaded adjusting rod 14, thereby increasing the range of height that can be raised for the object.

[0037] When retracting the jack cylinder 1, because the rack 7 on the second support rod 5 and the rack 7 on the jack cylinder 1 are continuously engaged by the spring 10, it is necessary to pull the limiting rod 9 to compress the spring 10 and cause the limiting rod 9 to move the rack 7 on the second support rod 5 away from the rack 7 on the jack cylinder 1 in order to slowly retract the lifting plate 3. However, to complete this operation, the limiting rod 9 must be continuously pulled; otherwise, even after the external force is removed, the spring 10 will still push the second support rod 5 towards the jack cylinder 1, causing the two racks 7 to mesh with each other. This results in the need for multiple people to work together or restrict the movement of the limiting rod 9 during retrieval. To facilitate single-person operation, a locking piece 15 is rotatably connected to the outside of the slider 8. The part of the limiting rod 9 located between the slider 8 and the second support rod 5 has a groove 16 that matches the locking piece 15. When the limiting rod 9 is pulled out, the groove 16 on the limiting rod 9 protrudes from the slider 8. Then, the locking piece 15 is rotated to make it embed into the groove 16, and then the retraction of the limiting rod 9 under the force of the spring 10 is restricted, so that a single person can retrieve the jack cylinder 1.

[0038] To increase the friction between the lifting plate 3 and the item and prevent the item from slipping, an anti-slip strip 17 is fixed on the side of the lifting plate 3 that is suitable for contacting the item.

[0039] Working principle: When the jack is needed, the hydraulic adjustment device 2 controls the oil pressure inside the jack cylinder 1, causing the output end of the jack cylinder 1 to move upward, slowly lifting the object on the lifting plate 3. During the lifting process, the lifting plate 3 rises, driving the first support rod 4 and the second support rod 5 of the hinged support assembly to rise simultaneously. Due to the action of the spring 10, the rack 7 on the second support rod 5 is always pressed against the rack 7 on the jack cylinder 1, restricting the downward movement of the second support rod 5. When the object tilts or the lifting plate 3 is pressed against the edge by the weight of the object, the rack 7 on the second support rod 5 and the rack 7 on the jack cylinder 1 provide additional support force because they abut against each other, preventing the lifting plate 3 from tilting and enhancing the lifting effect. The edge support of plate 3 allows for adjustment of the distance between the extended end of the jack cylinder 1 and the height of the object to be lifted when it exceeds the length of the output end of the jack cylinder 1. This increases the lifting range of the object and improves the flexibility of use. When retracting the jack cylinder 1, the spring 10 continuously meshes the rack 7 on the second support rod 5 with the rack 7 on the jack cylinder 1. During single-person operation, the spring 10 is squeezed by pulling the limiting rod 9, causing the limiting rod 9 to move the rack 7 on the second support rod 5 away from the rack 7 on the jack cylinder 1. When the groove 16 on the limiting rod 9 protrudes from the slider 8, the locking piece 15 is rotated and embedded in the groove 16, restricting the retraction of the limiting rod 9 under the action of the spring 10, thus facilitating single-person operation of the retrieval.

[0040] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. An easily adjustable hydraulic jack, comprising: The jack cylinder (1) and hydraulic adjustment device (2) are characterized in that the hydraulic adjustment device (2) can control the hydraulic pressure in the jack cylinder (1). The jack cylinder (1) is characterized in that a lifting plate (3) is hinged to the top of the output end of the jack cylinder (1), and a support component and a limiting component are provided at the bottom of the lifting plate (3). The support assembly includes a first support rod (4), a second support rod (5), and two limiting plates (6). One end of the first support rod (4) is hinged to the bottom edge of the lifting plate (3), and the other end is hinged to one end of the second support rod (5). The two limiting plates (6) are fixed to the outer wall of the jack cylinder (1). The second support rod (5) is slidably connected between the two limiting plates (6). The second support rod (5) is provided with a rack (7) on the side opposite to the jack cylinder (1). The limiting assembly includes a slider (8), a limiting rod (9), and a spring (10). The two limiting plates (6) are provided with grooves (11) for the slider (8) to slide up and down. The limiting rod (9) is slidably inserted into the slider (8) and hinged to the second support rod (5). The spring (10) is wrapped around the limiting rod (9), and the two ends of the spring (10) are respectively pressed against the slider (8) and the second support rod (5).

2. The easily adjustable hydraulic jack according to claim 1, characterized in that, Both the support assembly and the limiting assembly are two sets and are symmetrically arranged on the jack cylinder (1).

3. The easily adjustable hydraulic jack according to claim 1, characterized in that, The limiting rod (9) is provided with a fixed protrusion (12), and the spring (10) abuts against the fixed protrusion (12) and the slider (8) respectively.

4. The easily adjustable hydraulic jack according to claim 1, characterized in that, A mounting block (13) is provided at the hinge point between the lifting plate (3) and the output end of the jack cylinder (1). One side of the mounting block (13) is fixed to the output end of the jack cylinder (1), and the other side is hinged to the lifting plate (3).

5. The easily adjustable hydraulic jack according to claim 4, characterized in that, The mounting block (13) is fixed to the output end of the jack cylinder (1) with a threaded adjusting rod (14). One end of the threaded adjusting rod (14) is threadedly connected to the output end of the jack cylinder (1), and the other end is embedded in the mounting block (13) and rotatably connected to the mounting block (13).

6. The easily adjustable hydraulic jack according to claim 1, characterized in that, The slider (8) is rotatably connected to a locking member (15), and the limiting rod (9) located between the slider (8) and the second support rod (5) has a groove (16) adapted to the locking member (15).

7. The easily adjustable hydraulic jack according to claim 1, characterized in that, The lifting plate (3) is adapted to have an anti-slip strip (17) fixed on the side that contacts the item.

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