Jack capable of precisely and slightly displacing and control method

Abstract

The invention belongs to the technical field of jacks, and discloses a precise micro-displacement jack which comprises a sliding supporting table and further comprises sliding wheel sets arranged on the two sides of the sliding supporting table. The micro-displacement jack set is installed in the sliding supporting table in a sliding mode. The invention discloses a control method of a jack capable of precisely and slightly displacing. According to the invention, through the cooperation of structures such as the stabilizing assembly and the lifting driving assembly, when the whole lifting driving assembly is driven to move towards one side, the lifting driving assembly is driven to move towards the other side, the lifting driving assembly is driven to move towards the other side, and the lifting driving assembly is driven to move towards the other side; and when the two sides of one end of the lifting driving assembly move, the stabilizing assemblies between the two sides of the sliding supporting table and the sliding wheel sets are pushed to synchronously move downwards till the bottoms of the stabilizing assemblies make contact with the ground, so that the contact area between the two sides and the ground is increased through extrusion, and the overall fixing stability of the sliding supporting table is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of jack technology, specifically a jack capable of precise micro-displacement and its control method. Background Technology

[0002] A jack capable of precise micro-displacement is a claw jack with a sliding table / pulling wheel. It refers to a precision device that combines vertical lifting and horizontal fine-tuning functions, suitable for applications such as precision equipment assembly and position fine-tuning. Specifically: 1. Vertical lifting: Lifting heavy objects using a ratchet wrench or hydraulic system, suitable for lifting heavy equipment (such as printing presses and semiconductor equipment); 2. Horizontal fine-tuning: 1) Model with sliding table: The bottom integrates a sliding table, which is driven by a ratchet handle to achieve precise adjustment within a range of 100mm, avoiding repeated lifting or manual movement; 2) With sliding wheels: Polyurethane wheels are added to the slide table, which can move horizontally by about 100mm in all directions (front, back, left, and right) after the load is lifted, significantly improving maneuverability.

[0003] Existing precision micro-displacement jacks move horizontally via a sliding table and sliding wheels. However, when lifting heavy objects, the jack's center of gravity rises, and the sliding wheels then fix it in place. But due to the circular design, the upper center of gravity sways, causing the jack to tilt or even fall over, thus affecting the stability of lifting heavy objects. Therefore, improvements are needed. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a jack capable of precise micro-displacement and a control method thereof.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a jack capable of precise micro-displacement, comprising a sliding support platform, and further comprising: a set of sliding wheels disposed on both sides of the sliding support platform; a micro-displacement jack assembly slidably installed inside the sliding support platform; a stabilizing component installed on both sides of the sliding support platform and located inside the set of sliding wheels; and a lifting drive assembly disposed on the top of one side of the sliding support platform; wherein, the lifting drive assembly includes a lifting transmission block fixedly installed inside the top of the stabilizing component, a drive frame is slidably connected to one side of the sliding support platform, the rear end of the drive frame is threadedly connected to the surface of a second drive screw that is movably sleeved with one side of the sliding support platform, and the front end of the drive frame is slidably connected to the surface of a second limiting rod fixed to one side of the sliding support platform.

[0006] Preferably, the micro-displacement jack assembly includes a first drive screw, a micro-displacement slide, and a jack assembly; The first drive screw is movably sleeved on one side of the sliding support platform, the micro-displacement slide is slidably installed inside the sliding support platform and is threadedly sleeved to one end of the first drive screw, and the jack assembly is set on the top of the micro-displacement slide.

[0007] Preferably, the stabilizing component includes a stabilizing support, a first limiting rod, and a first spring; The stable support base is movably installed on both sides of the sliding support platform and located inside the sliding wheel assembly. The first limiting rod is fixedly installed inside the sliding support platform and slidably connected to the top of the inner end of the stable support base. The bottom of the inner end of the stable support base is elastically connected to the surface of the sliding support platform through a first spring.

[0008] Preferably, the inner wall of the first spring is slidably connected to the surface of the first limiting rod.

[0009] Preferably, the protruding portion at one end of the drive frame extends into the inclined groove opened inside the lifting transmission block, and the protruding portion at one end of the drive frame is slidably connected to the inner wall of the inclined groove of the lifting transmission block.

[0010] Preferably, a gripping mechanism is provided at the bottom of the interior of the stable support base, the gripping mechanism including a gripping plate, a pneumatic component and a trigger block; The gripping plate is movably mounted on the bottom of the outside of the stable support base, the pneumatic assembly is mounted inside the stable support base and located inside the gripping plate, and the trigger block is mounted on the surface of the sliding support platform and located below the inside of the pneumatic assembly.

[0011] Preferably, the pneumatic assembly includes a first pneumatic cylinder, a first piston rod, a second pneumatic cylinder, a second piston rod, a second spring, and an air passage. The first pneumatic cylinder is fixedly installed inside the bottom of the cavity of the stable support base. The first piston rod is slidably installed inside the cavity of the first pneumatic cylinder. The bottom of the inner end of the first piston rod adopts a bevel design. The second pneumatic cylinder is fixedly installed inside the stable support base and above the gripping plate. The second piston rod is slidably installed inside the cavity of the second pneumatic cylinder. The bottom of the second piston rod is fixedly connected to the top of the gripping plate. The bottom surface of the top of the second piston rod is elastically connected to the inner wall of the second pneumatic cylinder through a second spring. The first pneumatic cylinder is connected to the second pneumatic cylinder through a ventilation pipe.

[0012] Preferably, the inner wall of the stable support base is provided with locking components located inside both sides of the gripping plate. The locking components include a fixing plate, a third limiting rod, a locking block, a third spring, and a transmission top block. The fixing plate is fixedly installed inside the outside of the stable support base and is slidably connected to the inner walls on both sides of the gripping plate. The third limiting rod is fixedly installed inside the top of the fixing plate. The locking block is slidably installed on both sides of the third limiting rod. The outer side of the locking block is elastically connected to the inner wall of the fixing plate through a third spring. The transmission top block is slidably installed at the bottom of the inner cavity of the fixing plate.

[0013] Preferably, the bottom slope of the locking block is adapted to the slope of the top of the transmission block and is slidably connected to each other.

[0014] A method for controlling a jack capable of precise micro-displacement, comprising the following steps: S1; The sliding support platform is moved to the designated position of the heavy object by means of the sliding wheel group, and the displacement can be adjusted by the micro displacement jack group; S2; Drive the lifting drive component to move the entire stabilizing component downwards, so that the bottom of the stabilizing component contacts the ground, and determine the contact based on the hardness of the ground; S3; When the ground is soft, the gripping mechanism will be driven smoothly so that the bottom of the outer end faces downward. The gripping force can be improved by inserting the sharp part of the bottom of the outer end of the gripping mechanism into the soil. S4; When the ground is hard, the locking component will be pre-driven to fix the entire gripping mechanism in place, without the sharp bottom of the outer end of the gripping mechanism being inserted into the ground; S5; After the sliding support platform is stabilized by the stabilizing components, the micro-displacement jack assembly can be driven to lift the heavy object.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the coordinated arrangement of stabilizing components and lifting drive components, ensures that when the entire lifting drive component moves to one side, the movement of the two sides of one end of the lifting drive component pushes the stabilizing components on both sides of the sliding support platform and between the sliding wheel sets to move downwards synchronously until the bottom of the stabilizing components contacts the ground. This compresses and increases the contact area between the two sides and the ground, greatly improving the overall stability of the sliding support platform and further enhancing the stability of the subsequent micro-displacement jack assembly in lifting heavy objects. This invention, through the coordinated arrangement of a gripping mechanism and a locking component, allows the gripping mechanism to be driven when the stabilizing component moves downwards to its lowest point. This causes the outer bottom portion of the gripping mechanism to pre-move downwards. The mechanism then adjusts its position based on the ground's hardness. When the ground is soft, the outer bottom of the gripping mechanism moves downwards smoothly, with its sharp bottom portion penetrating the soil to enhance grip. When the ground is hard, the locking component retracts, fixing the outer side of the gripping mechanism in place. The stabilizing component provides direct support, ultimately ensuring the stability of the sliding support platform under varying ground conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the stable support base of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of the partial structure at point A in the middle; Figure 4 This is a schematic diagram of the lifting drive assembly of the present invention; Figure 5 This is a cross-sectional view of the gripping plate of the present invention; Figure 6 for Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0017] In the picture: 100. Sliding support platform; 200. Pulley assembly; 300. Micro-displacement jack assembly; 310. First drive screw; 320. Micro-displacement slide; 330. Jack assembly; 400. Stabilizing component; 410. Stabilizing support base; 420. First limiting rod; 430. First spring; 500. Lifting drive assembly; 510. Lifting transmission block; 520. Drive frame; 530. Second drive screw; 540. Second limit rod; 600. Gripping mechanism; 610. Gripping plate; 620. Pneumatic assembly; 621. First pneumatic cylinder; 622. First piston rod; 623. Second pneumatic cylinder; 624. Second piston rod; 625. Second spring; 626. Air duct; 630. Trigger block; 700 Locking assembly; 710 Fixing plate; 720 Third limit rod; 730 Locking block; 740 Third spring; 750 Transmission top block. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 6As shown, the present invention provides a jack capable of precise micro-displacement, including a sliding support platform 100, and further including: a sliding wheel assembly 200 disposed on both sides of the sliding support platform 100; a micro-displacement jack assembly 300 slidably installed inside the sliding support platform 100; a stabilizing component 400 installed on both sides of the sliding support platform 100 and located inside the sliding wheel assembly 200; and a lifting drive assembly 500 disposed on the top of one side of the sliding support platform 100. The lifting drive assembly 500 includes a lifting transmission block 510 fixedly installed inside the top of the stabilizing component 400. A drive frame 520 is slidably connected to one side of the sliding support platform 100. The rear end of the drive frame 520 is threadedly connected to the surface of a second drive screw 530 movably sleeved with one side of the sliding support platform 100, and the front end of the drive frame 520 is slidably connected to the surface of a second limiting rod 540 fixed to one side of the sliding support platform 100.

[0020] When the second drive screw 530 is rotated, the drive frame 520 can be driven to move horizontally to one side under the limiting action of the second limit rod 540. Then, one end of the drive frame 520 will drive the lifting transmission block 510 and the stabilizing component 400 to move downward as a whole until the stabilizing components 400 on both sides descend to the bottom and contact the ground, so as to improve the stability effect of the micro-displacement jack assembly 300 when lifting heavy objects.

[0021] like Figure 1 As shown, the micro-displacement jack assembly 300 includes a first drive screw 310, a micro-displacement slide 320, and a jack assembly 330. The first drive screw 310 is movably sleeved on one side of the sliding support platform 100. The micro-displacement slide 320 is slidably installed inside the sliding support platform 100 and is threadedly sleeved with one end of the first drive screw 310. The jack assembly 330 is set on the top of the micro-displacement slide 320.

[0022] Using the above scheme: when the first drive screw 310 is rotated, the thread at one end of the first drive screw 310 can drive the micro-displacement slide 320 and the jack assembly 330 to perform micro-displacement adjustment on the inner wall of the sliding support platform 100.

[0023] like Figure 3 and Figure 4 As shown, the stabilizing component 400 includes a stabilizing support base 410, a first limiting rod 420, and a first spring 430; The stable support base 410 is movably installed on both sides of the sliding support platform 100 and located inside the sliding wheel assembly 200. The first limiting rod 420 is fixedly installed inside the sliding support platform 100 and is slidably connected to the top of the inner end of the stable support base 410. The bottom of the inner end of the stable support base 410 is elastically connected to the surface of the sliding support platform 100 through the first spring 430.

[0024] The above solution is adopted because of the elastic design of the first spring 430. When the entire stable support 410 moves downward and compresses the first spring 430, it can buffer the downward impact force and avoid damage to the bottom of the stable support 410 caused by the instantaneous downward movement, thus achieving the purpose of protection.

[0025] like Figure 3 and Figure 4 As shown, the inner wall of the first spring 430 is slidably connected to the surface of the first limiting rod 420.

[0026] Using the above scheme: when the stable support base 410 is driven to move up and down as a whole, it can move horizontally up and down along the surface of the first limiting rod 420. At the same time, the first limiting rod 420 can limit the passive extension and retraction of the first spring 430.

[0027] like Figure 4 As shown, the protruding part at one end of the drive frame 520 extends into the inclined groove opened inside the lifting transmission block 510, and the protruding part at one end of the drive frame 520 is slidably connected to the inner wall of the inclined groove of the lifting transmission block 510.

[0028] By adopting the above solution: when the drive frame 520 is driven to move to one side, the protruding part at one end of the drive frame 520 will slide on the inner wall of the inclined groove of the lifting transmission block 510, which can realize the overall downward movement of the drive lifting transmission block 510 and the stable support base 410, so that the bottom of the stable support base 410 contacts the ground, greatly improving the overall stability of the sliding support platform 100.

[0029] like Figure 3 As shown, a gripping mechanism 600 is provided at the bottom of the interior of the stable support base 410. The gripping mechanism 600 includes a gripping plate 610, a pneumatic component 620 and a trigger block 630. The gripping plate 610 is movably mounted on the bottom of the outside of the stable support base 410, the pneumatic assembly 620 is mounted inside the stable support base 410 and located inside the gripping plate 610, and the trigger block 630 is mounted on the surface of the sliding support table 100 and located below the inside of the pneumatic assembly 620.

[0030] The above solution is adopted so that when the gripping plate 610 moves smoothly downward, the sharp part at the bottom will insert into the soft ground, which improves the grip and the stability of the sliding support platform 100.

[0031] like Figure 3 As shown, the pneumatic assembly 620 includes a first pneumatic cylinder 621, a first piston rod 622, a second pneumatic cylinder 623, a second piston rod 624, a second spring 625, and an air passage 626; The first pneumatic cylinder 621 is fixedly installed inside the bottom of the cavity of the stable support base 410. The first piston rod 622 is slidably installed inside the cavity of the first pneumatic cylinder 621. The bottom of the inner end of the first piston rod 622 adopts a bevel design. The second pneumatic cylinder 623 is fixedly installed inside the stable support base 410 and located above the gripping plate 610. The second piston rod 624 is slidably installed inside the cavity of the second pneumatic cylinder 623. The bottom of the second piston rod 624 is fixedly connected to the top of the gripping plate 610. The bottom surface of the top end of the second piston rod 624 is elastically connected to the inner wall of the second pneumatic cylinder 623 through the second spring 625. The first pneumatic cylinder 621 is connected to the second pneumatic cylinder 623 through the air pipe 626.

[0032] Using the above scheme: when the entire stable support base 410 moves downward, the inclined surface at the inner end of the first piston rod 622 may be squeezed by the trigger block 630 and pushed into the interior of the first pneumatic cylinder 621, so that the gas in the inner cavity of the first pneumatic cylinder 621 enters the interior of the second pneumatic cylinder 623 through the ventilation pipe 626. Then, when there is no obstruction at the bottom of the gripping plate 610, the gas entering from the top of the second pneumatic cylinder 623 will drive the second piston rod 624 and the gripping plate 610 to move downward as a whole.

[0033] like Figure 6 As shown, the inner wall of the stable support base 410 is provided with locking components 700 located inside both sides of the gripping plate 610. The locking components 700 include a fixing plate 710, a third limiting rod 720, a locking block 730, a third spring 740, and a transmission top block 750. The fixing plate 710 is fixedly installed inside the outside of the stable support base 410 and is slidably connected to the inner walls on both sides of the gripping plate 610. The third limiting rod 720 is fixedly installed inside the top of the fixing plate 710. The locking block 730 is slidably installed on both sides of the third limiting rod 720. The outer side of the locking block 730 is elastically connected to the inner wall of the fixing plate 710 through the third spring 740. The transmission top block 750 is slidably installed at the bottom of the inner cavity of the fixing plate 710.

[0034] The above solution is adopted because the design of the third limiting rod 720 can limit the movement of the locking block 730 in opposite directions and drive the third spring 740 to extend and retract.

[0035] like Figure 6 As shown, the bottom slope of the locking block 730 is adapted to the slope of the top of the transmission block 750 and they are slidably connected to each other.

[0036] Using the above solution: when the bottom of the transmission block 750 is pushed upward by the ground, the top inclined surface of the transmission block 750 will slide along the bottom inclined surface of the locking block 730, causing the locking block 730 to move in opposite directions. Ultimately, the top two sides of the locking block 730 can be locked inside the gripping plate 610, achieving the effect of locking and fixing the gripping plate 610 as a whole.

[0037] A method for controlling a jack capable of precise micro-displacement, comprising the following steps: S1; The sliding support platform 100 is moved as a whole to the position of the specified heavy object by means of the sliding wheel group 200, and the micro displacement jack group 300 can be adjusted for displacement; S2; Drive the lifting drive component 500 to move the entire stabilizing component 400 downward, so that the bottom of the stabilizing component 400 contacts the ground, and determine the hardness of the ground according to the ground. S3; When the ground is soft, the gripping mechanism 600 will be driven smoothly so that the bottom of the outer end faces downward. The gripping force can be improved by inserting the sharp part of the bottom of the outer end of the gripping mechanism 600 into the soil. S4; When the ground is hard, the locking component 700 will be pre-driven to fix the entire gripping mechanism 600, without the sharp bottom of the outer end of the gripping mechanism 600 being inserted into the ground; S5; After the sliding support platform 100 is stabilized by the stabilizing component 400, the micro-displacement jack assembly 300 can be driven to lift the heavy object.

[0038] Working principle and usage process of this invention: First, when the operator needs to lift a heavy object at a designated location, the sliding support platform 100 can be moved to the corresponding position by the sliding wheel group 200. At the same time, the first drive screw 310 can be rotated to drive the micro-displacement slide 320 and the jack group 330 to make precise micro-displacement adjustments.

[0039] Before using the jack assembly 330, the second drive screw 530 can be rotated to drive the drive frame 520 to move horizontally to one side under the limiting action of the second limit rod 540. At this time, the protruding part of one end of the drive frame 520 will slide in the inclined groove in the lifting transmission block 510, thereby squeezing and pushing the stable support base 410 to move horizontally downward under the limiting action of the first limit rod 420, and compressing the first spring 430. The elastic force of the first spring 430 can slow down the downward movement speed of the stable support base 410, avoiding the instantaneous drop that would cause the bottom of the stable support base 410 to hit the ground and cause damage. Then, the determination can be made according to the different ground hardness conditions.

[0040] When the ground is soft, when the stable support base 410 descends to its lowest point, the trigger block 630 will squeeze and push the bottom slope of the inner end of the first piston rod 622, causing the first piston rod 622 to retract into the inner cavity of the first pneumatic cylinder 621. This allows the gas in the inner cavity of the first pneumatic cylinder 621 to be pushed through the ventilation pipe 626 into the inner cavity of the second pneumatic cylinder 623, thereby pushing the second piston rod 624 to drive the gripping plate 610 to move downwards as a whole until the sharp part at the bottom of the gripping plate 610 is successfully inserted into the soft soil. Ultimately, by increasing the gripping force, the overall stability of the sliding support platform 100 can be improved.

[0041] When the ground is hard, when the stable support 410 moves downward to the bottom, the bottom of the transmission top block 750 will be squeezed and pushed upward into the fixed plate 710. The upward movement of the fixed plate 710 will cause the inclined surfaces on both sides of the top of the fixed plate 710 to push the locking block 730 to move in opposite directions along the inclined surface at the bottom of the locking block 730 until the outer end of the top of the locking block 730 is inserted into the top of the gripping plate 610. This will block and fix the gripping plate 610 inside the stable support 410, preventing it from moving downward. Finally, the stable support 410 can maintain stability by directly contacting the ground.

[0042] Finally, the heavy object can be successfully lifted by driving the jack assembly 330.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A jack capable of precise micro-displacement, comprising a sliding support platform (100), characterized in that: Also includes: A set of sliding wheels (200) is provided on both sides of the sliding support platform (100); The micro-displacement jack assembly (300) is slidably installed inside the sliding support platform (100); A stabilizing component (400) is mounted on both sides of the sliding support platform (100) and located inside the sliding wheel assembly (200); A lifting drive assembly (500) is disposed on the top of one side of the sliding support platform (100); The lifting drive assembly (500) includes a lifting transmission block (510) fixedly installed inside the top of the stabilizing assembly (400). A drive frame (520) is slidably connected to one side of the sliding support platform (100). The rear end of the drive frame (520) is threadedly connected to the surface of a second drive screw (530) that is movably sleeved with one side of the sliding support platform (100). The front end of the drive frame (520) is slidably connected to the surface of a second limiting rod (540) fixed to one side of the sliding support platform (100).

2. The jack capable of precise micro-displacement according to claim 1, characterized in that: The micro-displacement jack assembly (300) includes a first drive screw (310), a micro-displacement slide (320), and a jack assembly (330). The first drive screw (310) is movably sleeved on one side of the sliding support platform (100), the micro-displacement slide (320) is slidably installed inside the sliding support platform (100) and is threadedly sleeved to one end of the first drive screw (310), and the jack assembly (330) is set on the top of the micro-displacement slide (320).

3. The jack capable of precise micro-displacement according to claim 1, characterized in that: The stabilizing component (400) includes a stabilizing support (410), a first limiting rod (420), and a first spring (430). The stable support base (410) is movably installed on both sides of the sliding support platform (100) and located inside the sliding wheel assembly (200). The first limiting rod (420) is fixedly installed inside the sliding support platform (100) and slidably connected to the top of the inner end of the stable support base (410). The bottom of the inner end of the stable support base (410) is elastically connected to the surface of the sliding support platform (100) through the first spring (430).

4. The jack capable of precise micro-displacement according to claim 3, characterized in that: The inner wall of the first spring (430) is slidably connected to the surface of the first limiting rod (420).

5. The jack capable of precise micro-displacement according to claim 1, characterized in that: The protruding part at one end of the drive frame (520) extends into the inclined groove opened inside the lifting transmission block (510), and the protruding part at one end of the drive frame (520) is slidably connected to the inner wall of the inclined groove of the lifting transmission block (510).

6. The jack capable of precise micro-displacement according to claim 3, characterized in that: The bottom of the stable support base (410) is provided with a gripping mechanism (600), which includes a gripping plate (610), a pneumatic component (620) and a trigger block (630). The gripping plate (610) is movably mounted on the bottom of the outside of the stable support base (410), the pneumatic assembly (620) is mounted inside the stable support base (410) and located inside the gripping plate (610), and the trigger block (630) is mounted on the surface of the sliding support platform (100) and located below the inside of the pneumatic assembly (620).

7. The jack capable of precise micro-displacement according to claim 6, characterized in that: The pneumatic assembly (620) includes a first pneumatic cylinder (621), a first piston rod (622), a second pneumatic cylinder (623), a second piston rod (624), a second spring (625), and an air passage (626). The first pneumatic cylinder (621) is fixedly installed on the inner side of the bottom of the cavity of the stable support base (410). The first piston rod (622) is slidably installed in the cavity of the first pneumatic cylinder (621). The bottom of the inner end of the first piston rod (622) adopts a bevel design. The second pneumatic cylinder (623) is fixedly installed inside the stable support base (410) and located above the gripping plate (610). The second piston rod (624) is slidably installed in the cavity of the second pneumatic cylinder (623). The bottom of the second piston rod (624) is fixedly connected to the top of the gripping plate (610). The bottom surface of the top end of the second piston rod (624) is elastically connected to the inner wall of the second pneumatic cylinder (623) through the second spring (625). The first pneumatic cylinder (621) is connected to the second pneumatic cylinder (623) through the air pipe (626).

8. The jack capable of precise micro-displacement according to claim 3, characterized in that: The inner wall of the stable support base (410) is provided with locking components (700) located inside both sides of the gripping plate (610). The locking components (700) include a fixing plate (710), a third limiting rod (720), a locking block (730), a third spring (740), and a transmission top block (750). The fixing plate (710) is fixedly installed inside the outside of the stable support base (410) and slidably connected to the inner walls on both sides of the gripping plate (610). The third limiting rod (720) is fixedly installed inside the top of the fixing plate (710). The locking block (730) is slidably installed on both sides of the third limiting rod (720). The outer side of the locking block (730) is elastically connected to the inner wall of the fixing plate (710) through the third spring (740). The transmission top block (750) is slidably installed at the bottom of the inner cavity of the fixing plate (710).

9. The jack capable of precise micro-displacement according to claim 8, characterized in that: The bottom slope of the locking block (730) is adapted to the slope of the top of the transmission block (750) and they are slidably connected to each other.

10. A control method for a precisely micro-displaceable jack, applied to the precisely micro-displaceable jack according to any one of claims 1-9, characterized in that, The steps are as follows: S1; The sliding support platform (100) is moved as a whole to the position of the specified heavy object by means of the sliding wheel group (200), and the micro displacement jack group (300) can be adjusted for displacement; S2; The driving lifting drive component (500) drives the stabilizing component (400) to move downwards as a whole, so that the bottom of the stabilizing component (400) contacts the ground, and the determination is made according to the softness or hardness of the ground; S3; When the ground is soft, the gripping mechanism (600) will be driven smoothly so that the bottom of the outer end faces downward. The gripping force can be improved by inserting the sharp part of the bottom of the outer end of the gripping mechanism (600) into the soil. S4; When the ground is hard, the locking component (700) will be pre-driven to fix the gripping mechanism (600) as a whole, without the sharp bottom of the outer end of the gripping mechanism (600) being inserted into the ground; S5; After the sliding support platform (100) is stabilized by the stabilizing component (400), the micro-displacement jack assembly (300) can be driven to lift the heavy object.

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