Hydraulic jack fixing device suitable for irregular boss and using method

Abstract

The invention discloses a hydraulic jack fixing device suitable for an irregular boss and a using method. The device comprises a base plate base, a middle base plate and an upper-layer bracket which are detachably and fixedly connected in sequence from bottom to top. The number of the middle base plates is determined by the height of a hydraulic jack base, the jacking stroke range and the distance between the irregular boss plane and an object to be jacked. Top grooves are formed in the middle of the top of the base plate base and the middle of the top of the middle base plate correspondingly, through holes penetrating to the lower end face are formed in the bottoms of the top grooves correspondingly, the inner edges of the through holes are smaller than the inner edges of the bottoms of the top grooves, and adjusting ejector pins capable of stretching and retracting in the radial direction of the base plate base are symmetrically arranged on the side walls of the base plate base. Radial and height adjustment can be achieved by adjusting the ejector pins and calculating the number of the middle base plates, the device can be stably used on an inclined face through the magnetic plate, risks caused by sliding or inclining of the jack base are avoided, and therefore the safety of constructors and the construction quality are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a hydraulic jack fixing device suitable for irregular bosses and a use method thereof. Background Art

[0002] During the construction of ships, hydraulic jacks are often used as important tools for lifting and supporting objects to be lifted. For flat surfaces, the hydraulic jack can be used by placing it directly on the plane, which is quick and convenient, and facilitates the smooth development of ship construction. However, for some surfaces with bosses or irregular shapes, since the bottom of the hydraulic jack base is also flat, it is difficult to firmly fit and fix it directly on the bosses or irregular shapes; and if the hydraulic jack is used directly on these irregular surfaces, under the reverse action of the oil pressure, the hydraulic jack is prone to slipping, rolling over and other dangerous phenomena, which not only hinders equipment installation and other work, but also poses certain safety hazards.

[0003] In view of this, the present application invents a hydraulic jack fixing device suitable for irregular bosses and a method of use, the device being able to adapt radially and height-adaptively adjust to the raised portions on the irregular bosses, and being able to be used stably on inclined surfaces; the device design of the present application not only solves the technical difficulties in using hydraulic jacks on irregular surfaces, but also significantly improves the safety and efficiency of operations; by using the fixing device, the stability of the hydraulic jack can be ensured in an irregular boss environment, and the risks caused by sliding or tilting of the base can be avoided, thereby ensuring the safety of construction workers and the quality of construction. Summary of the invention

[0004] In order to solve the problems existing in the prior art mentioned above, the purpose of the present invention is to provide a hydraulic jack fixing device and a method of use suitable for irregular bosses. The device adopts a split structure, which is easy to disassemble and carry. The device has a simple design, low cost, and a wide range of applications. It effectively solves the technical difficulties of using hydraulic jacks on irregular bosses and improves the safety of use. In addition, the method of the present invention enhances the radial adaptability of the device by adjusting the ejector pin; by calculating and determining the number of adjustment pads, it can adapt to the lifting heights of different hydraulic jacks; in addition, the magnetic plate design at the bottom also ensures the stability of the device on the inclined plane, thereby expanding its scope of use and enhancing the versatility of the device and irregular bosses.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the present invention adopts the following technical solutions:

[0006] In a first aspect of the present invention, there is provided a hydraulic jack fixing device suitable for an irregular boss, comprising a pad base, an intermediate pad and an upper bracket which are detachably fixedly connected in sequence from bottom to top, wherein the number of the pad base and the number of the upper bracket are one each, and the number of the intermediate pads is several;

[0007] A top groove is provided in the middle of the top of the pad base and the middle pad, and a bottom convex is provided in the middle of the bottom of the middle pad and the upper bracket, and the bottom convex has a shape matching the top groove;

[0008] The bottoms of the top grooves of the pad base and the middle pad are both provided with through holes, the inner edges of the through holes are smaller than the inner edges of the bottoms of the top grooves, the through holes of the pad base are connected to the bottom end surface of the pad base, and the through holes of the middle pad are connected to the bottom convex lower end surface of the middle pad;

[0009] Side grooves are arranged on the side walls of the middle pad and the upper bracket, and adjusting pins are symmetrically arranged on the side walls of the pad base, and the adjusting pins can be telescopically movable along the radial direction of the pad base. Through the relative telescopic movement between the adjusting pins, the pad base clamp is fixed to the raised portion of the irregular boss.

[0010] As a preferred technical solution, the number of the intermediate pads is determined by the height of the hydraulic jack base, the lifting stroke range, and the distance from the irregular boss plane to the object to be lifted.

[0011] As a preferred technical solution, the adjustment pin is of a needle tip type, and the adjustment pin includes a needle tip section, a threaded section and a non-threaded section from the top to the end, and an internal thread matching the threaded section is provided on the side wall of the pad base, so that the adjustment pin is threadedly connected to the pad base.

[0012] As a preferred technical solution, an anti-skid groove is further provided in the middle of the top of the upper bracket, and the anti-skid groove has a shape matching the bottom of the hydraulic jack base.

[0013] A second aspect of the present invention provides a method for using a hydraulic jack fixing device suitable for an irregular boss, using any of the above-mentioned devices, comprising the following steps:

[0014] S1. Select a suitable fixing device according to the size and position of the raised portion of the irregular boss under the object to be lifted, and determine the placement position of the pad base;

[0015] S2. Measure the distance from the plane where the pad base is placed on the irregular boss to the object to be lifted, and calculate the required number of intermediate pads according to the base height of the hydraulic jack and the lifting stroke range;

[0016] S3, the pad base is sleeved through the through hole and installed on the raised portion of the irregular boss; and the pad base clamp is fixed on the raised portion by adjusting the symmetrically arranged adjusting ejector pins;

[0017] S4. Install the middle pad and the upper bracket on the pad base from bottom to top, and place a hydraulic jack on the upper bracket;

[0018] S5, start the hydraulic jack, so that the upper end surface of the hydraulic jack contacts and receives force from the object to be lifted, and completes the lifting work of the object to be lifted above the irregular boss;

[0019] S6. Remove the fixing device and hydraulic jack, and the construction is completed.

[0020] As a preferred technical solution, step S1 includes the following specific steps:

[0021] S1-1. Clean the irregular boss below the object to be lifted and confirm the size and position of the raised part on the irregular boss;

[0022] S1-2. Select a suitable fixing device according to the size of the raised portion of the irregular boss to ensure that the inner edge of the through hole is not smaller than the outer edge of the raised portion;

[0023] S1-3. At the same time, the placement position of the pad base is determined according to the position of the raised portion of the irregular boss, so that there are no obstacles within the range from the outer diameter of the pad base to the inner edge of the through hole.

[0024] As a preferred technical solution, step S3 includes the following specific steps:

[0025] S3-1, sleeve the pad base onto the raised portion of the irregular boss through the through hole;

[0026] S3-2. By adjusting the radial expansion and contraction of the adjusting ejector pins on the pad base, the symmetrically arranged adjusting ejector pins are respectively in contact with the raised portions, thereby fixing the pad base clamp to the raised portions to complete the installation of the pad base.

[0027] Furthermore, a magnetic plate is provided at the bottom of the pad base; in the step S3-1, after the pad base is sleeved on the raised portion of the irregular boss, the pad base is preliminarily fixed using the magnetic plate at the bottom of the pad base.

[0028] Furthermore, the non-threaded section of the adjusting ejector pin is provided with scale lines; in the step S3-2, in the process of adjusting the adjusting ejector pin, the following steps are also included: at the same time, observing the scale lines provided on the non-threaded section of the adjusting ejector pin, so that the scale lines of the two adjusting ejectors symmetrically provided on the side wall of the pad base have the same readings, and the top of the needle tip section is in contact with the raised portion at the same time, so that the raised portion is located at the center position in the through hole of the pad base.

[0029] As a preferred technical solution, the inner side walls of the top grooves of the pad base and the middle pad are provided with internal threads, the outer side walls of the bottom bulges of the middle pad and the upper bracket are provided with external threads matching the internal threads, and the top groove and the bottom bulge are threadedly connected; the specific steps of step S4 include: screwing and installing the middle pad and the upper bracket in turn through the top groove and the bottom bulge whose shapes and internal and external threads match, placing the hydraulic jack base on the upper surface of the upper bracket, and completing the fixation of the hydraulic jack at the irregular boss.

[0030] As described above, the present invention has the following beneficial effects:

[0031] The present invention discloses a hydraulic jack fixing device suitable for irregular bosses and a method for using the same. The split structural design uses a pad base, an intermediate pad and an upper bracket which are detachably fixedly connected from bottom to top in sequence. The device is easy to take and use, has a simple structure, a low manufacturing cost and a wide range of application scenarios. The device can solve the problem that hydraulic jacks are difficult to use on irregular bosses, reduces potential safety hazards and is of great benefit to shipbuilding. At the same time, the present invention increases the adaptability of the fixing device in the radial direction through the adjustment pin provided by the pad base, and adapts to the different lifting heights of various hydraulic jacks by adjusting the number of intermediate pads, thereby greatly increasing the versatility of the fixing device. Furthermore, the present invention provides a magnetic plate at the bottom of the pad base, thereby ensuring that the fixing device and the hydraulic jack can also be used on an inclined surface, thereby expanding the application scenarios of the fixing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the pad base in the present invention.

[0033] Figure 2 It is a schematic diagram of the overall structure of the middle pad in the present invention.

[0034] Figure 3 It is a schematic diagram of the overall structure of the upper bracket in the present invention.

[0035] Figure 4 It is a schematic diagram of the installation between the fixing device and the irregular convex raised portion in the present invention.

[0036] Among them, the specific descriptions of the accompanying drawings are as follows: 1. pad base; 101. magnetic plate; 102. adjustment pin; 2. middle pad; 3. upper bracket; 4. top groove; 5. bottom convex; 6. side groove; 7. hydraulic jack base; 8. irregular boss; 801. raised part. DETAILED DESCRIPTION

[0037] In order to better understand the purpose, structure and function of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it should be noted that the positional relationships indicated by terms such as “longitudinal”, “lateral”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” etc. cited in this specification are based on the positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] Example 1

[0040] like Figure 1-3 As shown, this embodiment provides a hydraulic jack fixing device suitable for irregular surfaces, including a pad base 1, a plurality of middle pads 2, and an upper bracket 3.

[0041] In this embodiment, the pad base 1 is annular and the intermediate pad 2 is annular, and the upper bracket 3 is a cylindrical structure. The pad base 1 and the intermediate pad 2 are both provided with a top groove 4 with internal threads in the middle of the top, and the internal threads have the same specifications; the intermediate pad 2 and the upper bracket 3 are both provided with a bottom convex 5 with external threads in the middle of the bottom, and the external threads have the same specifications, and the bottom convex 5 has a shape matching the top groove 4, and the top groove 4 with internal threads and the bottom convex 5 with external threads are adapted and connected by threads. The top groove 4 of the pad base 1 and the intermediate pad 2 are both provided with a circular through hole in the middle of the bottom, and the inner edge of the through hole is smaller than the inner edge of the bottom of the top groove 4. The through hole of the pad base 1 is connected to the bottom end face of the pad base 1, and the through hole of the intermediate pad 2 is connected to the lower end face of the bottom convex 5 of the intermediate pad 2.

[0042] In other embodiments, an anti-skid groove is further provided in the middle of the top of the upper bracket 3, and the anti-skid groove has a shape matching the bottom of the hydraulic jack base 7, thereby ensuring that even if the irregular boss 8 is an inclined surface, the hydraulic jack can still be effectively limited and fixed, avoiding the risk of the hydraulic jack falling from a high altitude during the jacking process due to the inclined surface, while improving the personal safety of the operator.

[0043] Two side grooves 6 are symmetrically arranged on the side walls of the intermediate pad 2 and the upper bracket 3, and the two side grooves 6 can facilitate the movement and disassembly of the intermediate pad 2 and the upper bracket 3, thereby improving the working efficiency. Adjustment pins 102 are symmetrically arranged on the side walls of the pad base 1. The adjustment pins 102 are needle-tip type. The adjustment pins 102 include a needle-tip section, a threaded section and a non-threaded section from the top to the bottom. The side walls of the pad base 1 are provided with internal threads matching the threaded section, so that the adjustment pins 102 are threadedly connected to the pad base 1, so that the adjustment pins 102 can be telescopically moved along the radial direction of the pad base 1. Through the relative telescopic movement between the adjustment pins 102, the limit size of the internal space of the through hole is changed, which is used to fix the pad base 1 clamp to the raised portion 801 of the irregular boss 8. In this embodiment, the non-threaded section is provided with scale lines, and the versatility of the fixing device can be increased by simultaneously adjusting the telescopic amount of the symmetrically arranged adjusting pins 102; and, the adjusting pins 102 are arranged at a position close to the bottom of the pad base 1, so that the pad base 1 can be clamped and fixed to the raised portion 801 of the irregular boss 8 even when the raised portion 801 of the irregular boss 8 is low; in addition, a magnetic plate 101 is also provided at the bottom of the pad base 1, and the magnetic plate 101 is used to increase the friction between the pad base 1 and the contact surface.

[0044] Example 2

[0045] like Figure 4 As shown, this embodiment provides a method for using a hydraulic jack fixing device suitable for an irregular boss using the embodiment 1, comprising the following steps:

[0046] S1. According to the size and position of the raised portion 801 of the irregular boss 8 below the object to be lifted, a suitable fixing device is selected and the placement position of the pad base 1 is determined.

[0047] S1-1, cleaning the irregular boss 8 below the object to be lifted, and confirming the size and position of the protrusion 801 on the irregular boss 8.

[0048] S1-2. Select a suitable fixing device according to the size of the raised portion 801 of the irregular boss 8 to ensure that the diameter of the through hole is not less than the diameter of the raised portion 801 .

[0049] S1-3. At the same time, according to the position of the raised portion 801 of the irregular boss 8, the placement position of the pad base 1 is determined so that there are no obstacles within the range from the outer diameter of the pad base 1 to the inner edge of the through hole, thereby ensuring the stable placement of the pad base 1.

[0050] S2. Measure the distance from the plane where the pad base 1 on the irregular boss 8 is placed to the object to be jacked, and calculate the required number of intermediate pads 2 according to the height of the hydraulic jack base 7 and the jacking stroke range.

[0051] In this embodiment, the calculation formula for calculating the required number of intermediate pads 2 is as follows: the required number of intermediate pads 2 ≥ (the distance from the plane of the irregular boss 8 to the object to be lifted - the height of the pad base 1 - the height of the upper bracket 3 - the height of the hydraulic jack base 7 - the maximum stroke height of the hydraulic jack) ÷ the height of the intermediate pad 2, and the required number of intermediate pads 2 is rounded up. It is suitable for situations where the project budget is limited, the space on the construction site is small or the transportation is inconvenient, and it is difficult to transport a large number of intermediate pads 2. Therefore, the auxiliary height increase of the pad base 1 is achieved with the minimum use of intermediate pads 2 without sacrificing safety. While minimizing the use of materials to control costs, time and labor costs are saved by reducing the number of times the intermediate pads 2 are transported.

[0052] In another embodiment, the formula for calculating the required number of intermediate pads 2 is as follows: the required number of intermediate pads 2 ≤ (the distance from the plane of the irregular boss 8 to the object to be lifted - the height of the pad base 1 - the height of the upper bracket 3 - the height of the hydraulic jack base 7 - the minimum stroke height of the hydraulic jack) ÷ the height of the intermediate pad 2, and the required number of intermediate pads 2 is rounded down. It is suitable for situations where the object to be lifted is very heavy. When the hydraulic jack has a longer stroke, the piston needs to push more hydraulic oil, thereby generating greater pressure, which may cause the internal components of the hydraulic jack to be subjected to greater stress, thereby increasing the risk of wear and damage. By setting more intermediate pads 2, the extension stroke of the hydraulic jack can be minimized, thereby dispersing the pressure on the internal components of the hydraulic jack to avoid damage to the hydraulic jack. At the same time, by using more intermediate pads 2, more stable support can be provided, reducing accidents caused by tilting or displacement.

[0053] In other embodiments, if the height of the raised portion 801 of the irregular boss 8 is relatively high, the required number of the intermediate pads 2 should also be ≥ (the height of the raised portion 801 of the irregular boss 8 - the height of the pad base 1) ÷ the height of the intermediate pad 2. The overlapping height of the through holes of the pad base 1 and the intermediate base increases the adaptability of the fixing device to the raised portion 801 of the irregular boss 8 in the height direction, and avoids interference of the upper end of the raised portion 801 with the upper bracket 3, thereby ensuring the installation and stability of the fixing device.

[0054] S3. Place and install the pad base 1 on the irregular boss 8 so that the through hole of the pad base 1 is sleeved on the raised portion 801 .

[0055] S3-1. Place the pad base 1 on the raised portion 801 of the irregular boss 8 through the through hole, and use the magnetic plate 101 at the bottom of the pad base 1 to preliminarily fix the pad base 1.

[0056] S3-2. By adjusting the radial expansion and contraction of the adjusting ejector pin 102 on the pad base 1, the symmetrically arranged adjusting ejector pins 102 are respectively in contact with the raised portion 801, so that the clamp of the pad base 1 is fixed to the raised portion 801. The adaptability of the fixing device to the raised portion 801 of the irregular boss 8 in the radial direction is increased through the telescopic adjustment of the adjusting ejector pin 102 on the pad base 1. In the process of adjusting the adjusting ejector pin 102, at the same time, observe the scale line set on the non-threaded section of the adjusting ejector pin 102, so that the scale line readings of the two symmetrically arranged adjusting ejector pins 102 on the side wall of the pad base 1 are the same, and the top of the needle tip section is in contact with the raised portion 801 at the same time, thereby ensuring that the raised portion 801 is located at the center position in the through hole of the pad base 1. The installation of the pad base 1 is completed.

[0057] S4. Install the middle pad 2 and the upper bracket 3 on the pad base 1 from bottom to top, and place the hydraulic jack on the upper bracket 3: screw and install the middle pad 2 and the upper bracket 3 in sequence through the top groove 4 and the bottom protrusion 5 whose shapes and internal and external threads match, place the hydraulic jack base 7 on the upper surface of the upper bracket 3, and complete the fixation of the hydraulic jack on the irregular boss 8.

[0058] S5, start the hydraulic jack, so that the upper end surface of the hydraulic jack contacts with the object to be lifted and receives force, and completes the lifting work of the object to be lifted above the irregular boss 8.

[0059] S6. Remove the fixing device and the hydraulic jack, and the construction is completed: Specifically, through the reverse operation of steps S3-S5, lower and remove the hydraulic jack, and remove the upper bracket 3, each intermediate pad 2 and the pad base 1 from top to bottom.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A hydraulic jack fixing device suitable for irregular bosses, characterized in that: It comprises a pad base (1), an intermediate pad (2) and an upper bracket (3) which are detachably fixedly connected in sequence from bottom to top, wherein the pad base (1) and the upper bracket (3) are each provided in one piece, and the intermediate pad (2) is provided in a plurality of pieces; A top groove (4) is provided in the middle of the top of the pad base (1) and the middle pad (2), and a bottom convexity (5) is provided in the middle of the bottom of the middle pad (2) and the upper bracket (3), and the bottom convexity (5) has a shape matching the top groove (4); The bottoms of the top grooves (4) of the pad base (1) and the middle pad (2) are both provided with through holes, the inner edges of the through holes are smaller than the inner edges of the bottoms of the top grooves (4), the through holes of the pad base (1) penetrate to the bottom end surface of the pad base (1), and the through holes of the middle pad (2) penetrate to the lower end surface of the bottom convexity (5) of the middle pad (2); Side grooves (6) are arranged on the side walls of the intermediate pad (2) and the upper bracket (3); adjustment pins (102) are symmetrically arranged on the side walls of the pad base (1); and the adjustment pins (102) can be telescopically movable along the radial direction of the pad base (1); and the pad base (1) clamp is fixed to the raised portion (801) of the irregular boss (8) through the relative telescopic movement between the adjustment pins (102).

2. A hydraulic jack fixing device suitable for irregular bosses according to claim 1, characterized in that: The number of the intermediate pads (2) is determined by the height of the hydraulic jack base (7), the lifting stroke range, and the distance from the plane of the irregular boss (8) to the object to be lifted.

3. The hydraulic jack fixing device suitable for irregular bosses according to claim 1, characterized in that: The adjusting ejector pin (102) is of a needle tip type, and comprises a needle tip section, a threaded section and a non-threaded section in sequence from the top to the bottom. The side wall of the pad base (1) is provided with an internal thread matching the threaded section, so that the adjusting ejector pin (102) is threadedly connected to the pad base (1).

4. The hydraulic jack fixing device suitable for irregular bosses according to claim 1, characterized in that: An anti-skid groove is also provided in the middle of the top of the upper bracket (3), and the anti-skid groove has a shape matching the bottom of the hydraulic jack base (7).

5. A method for using a hydraulic jack fixing device suitable for an irregular boss, using the device according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Select a suitable fixing device according to the size and position of the raised portion (801) of the irregular boss (8) below the object to be lifted, and determine the placement position of the pad base (1); S2, measuring the distance from the plane where the pad base (1) on the irregular boss (8) is placed to the object to be lifted, and calculating the required number of intermediate pads (2) according to the height of the hydraulic jack base (7) and the lifting stroke range; S3, inserting the pad base (1) through the through hole and installing it on the raised portion (801) of the irregular boss (8); and fixing the pad base (1) clamp on the raised portion (801) by adjusting the symmetrically arranged adjustment pins (102); S4, installing the middle pad (2) and the upper bracket (3) on the pad base (1) from bottom to top, and placing a hydraulic jack on the upper bracket (3); S5, starting the hydraulic jack so that the upper end surface of the hydraulic jack contacts and receives force from the object to be lifted, thereby completing the lifting work of the object to be lifted above the irregular boss (8); S6. Remove the fixing device and hydraulic jack, and the construction is completed.

6. A hydraulic jack fixing device and use method suitable for irregular bosses according to claim 5, characterized in that: The step S1 comprises the following specific steps: S1-1, cleaning the irregular boss (8) below the object to be lifted, and confirming the size and position of the protrusion (801) on the irregular boss (8); S1-2. Select a suitable fixing device according to the size of the raised portion (801) of the irregular boss (8) to ensure that the inner edge of the through hole is not smaller than the outer edge of the raised portion (801); S1-3. At the same time, according to the position of the raised portion (801) of the irregular boss (8), the placement position of the pad base (1) is determined so that there are no obstacles within the range from the outer diameter of the pad base (1) to the inner edge of the through hole.

7. A hydraulic jack fixing device and a method of using the same suitable for irregular bosses according to claim 5, characterized in that: The step S3 comprises the following specific steps: S3-1, sleeve the pad base (1) onto the raised portion (801) of the irregular boss (8) through the through hole; S3-2, by adjusting the radial expansion and contraction amount of the adjusting ejector pin (102) on the pad base (1), the symmetrically arranged adjusting ejector pins (102) are respectively in contact with the raised portions (801), thereby fixing the clamp of the pad base (1) to the raised portions (801), and completing the installation of the pad base (1).

8. A hydraulic jack fixing device and a method of using the same suitable for irregular bosses according to claim 7, characterized in that: A magnetic plate (101) is provided at the bottom of the pad base (1); In the step S3-1, after the pad base (1) is sleeved on the raised portion (801) of the irregular boss (8), the pad base (1) is initially fixed using the magnetic plate (101) at the bottom of the pad base (1).

9. A hydraulic jack fixing device and a method of using the same suitable for irregular bosses according to claim 7, characterized in that: The non-threaded section of the adjusting ejector pin (102) is provided with scale lines; In the step S3-2, during the process of adjusting the adjusting ejector pin (102), The following steps are involved: At the same time, the scale lines set on the non-threaded section of the adjustment pin (102) are observed so that the scale line readings of the two adjustment pins (102) symmetrically arranged on the side wall of the pad base (1) are the same, and the top of the needle tip section is in contact with the raised portion (801) at the same time, so that the raised portion (801) is located at the center position in the through hole of the pad base (1).

10. A hydraulic jack fixing device and a method of using the same suitable for irregular bosses according to claim 5, characterized in that: The inner side walls of the top groove (4) of the pad base (1) and the middle pad (2) are provided with internal threads, and the outer side walls of the bottom protrusion (5) of the middle pad (2) and the upper bracket (3) are provided with external threads matching the internal threads, and the top groove (4) and the bottom protrusion (5) are threadedly connected; The specific steps of step S4 include: The middle pad (2) and the upper bracket (3) are screwed and installed in sequence through the top groove (4) and the bottom convex (5) whose shapes and internal and external threads match, and the hydraulic jack base (7) is placed on the upper surface of the upper bracket (3), thereby completing the fixing of the hydraulic jack on the irregular convex platform (8).

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