A hydraulic leveling shim for a support plate

Abstract

The utility model provides a kind of support plate hydraulic leveling shim, belong to support plate technical field, this support plate hydraulic leveling shim includes base plate and adjusting assembly, base plate is rectangular plate structure, the upper surface of base plate is equipped with accommodating cavity, adjusting assembly includes hydraulic cylinder body and pressure plate, hydraulic cylinder body is fixedly installed in accommodating cavity, the bottom surface of pressure plate is connected by thread with the piston rod top end of hydraulic cylinder body, the top surface of pressure plate is support contact surface, four corner positions of base plate are formed support leg respectively downwardly extended, support contact surface of pressure plate is equipped with multiple radial distribution's reinforcing rib, reinforcing rib extends from the geometric center of pressure plate to edge direction, solve the technical problem that the support plate leveling shim in prior art is tilted or the local stress concentration of pressure plate is prone to occur in the process of adjusting when carrying out hydraulic adjustment due to the stability of insufficient base structure and the unreasonable contact mode between pressure plate and support plate.

Description

Technical Field

[0001] This utility model belongs to the field of support plate technology, and specifically relates to a hydraulic leveling pad for support plates. Background Technology

[0002] In the fields of machining and equipment installation, leveling support plates is a fundamental and crucial task, directly affecting the accuracy of subsequent machining and the stability of equipment operation. Traditional leveling methods mainly rely on manual adjustment using shims or wedges, which is not only inefficient but also difficult to achieve precise adjustments. With the development of hydraulic technology, hydraulic leveling shims have gradually been applied to the leveling of support plates. Existing hydraulic leveling shims typically consist of a base and a hydraulic adjustment device, adjusting the height of the support plate through the extension and retraction of a hydraulic cylinder. However, in practical applications, it has been found that existing hydraulic leveling shims have significant technical defects, mainly manifested in the instability of the base structure. The existing hydraulic leveling pads suffer from several shortcomings. Firstly, they lack sufficient stability, especially under heavy or eccentric loads, making them prone to overall tilting or localized subsidence, affecting leveling accuracy. Secondly, the existing technology typically uses a planar contact method between the pressure plate and the support plate, which can easily lead to localized stress concentration under load, causing plastic deformation of the pressure plate or support plate and shortening its service life. Furthermore, the connection between the hydraulic cylinder and the base of existing hydraulic leveling pads is also inadequate, easily loosening during long-term use, affecting adjustment accuracy and safety. Therefore, there is an urgent need for a hydraulic leveling pad with a stable structure, reasonable contact, and reliable connection to solve these technical problems. Utility Model Content

[0003] In view of this, the present invention provides a hydraulic leveling pad for a support plate, which solves the technical problem that, in the hydraulic adjustment of the support plate leveling pad in the prior art, the insufficient stability of the base structure and the unreasonable contact method between the pressure plate and the support plate easily lead to the overall tilting of the device or local stress concentration of the pressure plate during the adjustment process.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a hydraulic leveling pad for adjusting the horizontal position of a support plate. It includes a base plate and an adjustment assembly. The base plate has a rectangular plate structure with a receiving cavity on its upper surface. The adjustment assembly includes a hydraulic cylinder and a pressure plate. The hydraulic cylinder is fixedly installed within the receiving cavity. The bottom surface of the pressure plate is threadedly connected to the top of the piston rod of the hydraulic cylinder. The top surface of the pressure plate serves as a support contact surface. Support legs extend downwards from the four corners of the base plate, with the bottom surfaces of the support legs forming a stepped height difference with the bottom surface of the base plate. Multiple radially distributed reinforcing ribs extend from the geometric center of the pressure plate towards the edge. When the support plate is placed on the support contact surface of the pressure plate, the top surfaces of the reinforcing ribs are in line contact with the bottom surface of the support plate.

[0006] The technical effects of the hydraulic leveling pad for the support plate provided by this utility model are as follows: By setting downwardly extending support legs at the four corners of the base plate, and making the bottom end face of the support legs form a stepped height difference with the bottom surface of the base plate, the stability of the overall device can be effectively increased, preventing tilting or displacement during hydraulic adjustment. At the same time, by setting multiple radially distributed reinforcing ribs on the support contact surface of the pressure plate, and making the top surface of the reinforcing ribs in line contact with the bottom surface of the support plate, the contact stability between the pressure plate and the support plate can be significantly increased, reducing stress concentration caused by insufficient contact area, thereby improving the leveling accuracy and load-bearing capacity, and ensuring the positional stability of the support plate during the adjustment process.

[0007] Based on the above technical solution, the hydraulic leveling pad for the support plate of this utility model can be further improved as follows:

[0008] Wherein, the horizontal projection length of the support leg along the inner side of the corner of the base plate is greater than the horizontal projection length of the support leg along the outer side of the corner of the base plate.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the horizontal projection length of the support leg in the inner direction along the corner of the base plate greater than the horizontal projection length in the outer direction, a support structure that tilts inward can be formed, which can effectively enhance the support strength of the support leg in the central area of ​​the base plate, making the center of gravity of the whole device more stable and preventing overturning when subjected to eccentric loads. At the same time, this structural design can make the contact between the support leg and the ground more firm, improving the overall device's resistance to lateral forces during use.

[0010] Furthermore, the depth of the receiving cavity is 1 / 2 to 2 / 3 of the thickness of the base plate, and the outer circumferential surface of the hydraulic cylinder body is connected to the inner wall of the receiving cavity by an interference fit.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting the depth of the receiving cavity to one-half to two-thirds of the thickness of the base plate, it is possible to ensure that the hydraulic cylinder has sufficient installation depth while ensuring that the base plate has sufficient remaining thickness to withstand the pressure transmitted from above, thus avoiding deformation of the base plate due to insufficient thickness. At the same time, by using an interference fit between the outer circumferential surface of the hydraulic cylinder and the inner wall of the receiving cavity, the hydraulic cylinder and the base plate can be tightly combined, preventing loosening or displacement under hydraulic pressure, thereby improving the overall rigidity and service life of the device.

[0012] Furthermore, the cross-section of the reinforcing rib is trapezoidal, and the width of the upper base of the trapezoidal structure is smaller than the width of the lower base.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the cross-section of the reinforcing rib into a trapezoidal structure, and making the upper base width of the trapezoidal structure smaller than the lower base width, it is possible to ensure that the top of the reinforcing rib is in line contact with the support plate while allowing the bottom of the reinforcing rib to have a larger connection area to connect with the main body of the bearing plate. This improves the bending strength and shear resistance of the reinforcing rib, preventing the reinforcing rib from breaking or deforming when subjected to large loads. At the same time, this trapezoidal structure can also effectively disperse stress, allowing the load to be transferred more evenly to the main body of the bearing plate.

[0014] Furthermore, the bearing plate has 6 to 8 reinforcing ribs on its supporting contact surface, and the included angle between two adjacent reinforcing ribs is equal.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting 6 to 8 reinforcing ribs on the support contact surface of the bearing plate and making the included angle between two adjacent reinforcing ribs equal, a uniform radial support structure can be formed, so that the load on the support plate can be evenly distributed to the entire surface of the bearing plate through the reinforcing ribs, avoiding deformation or damage caused by local stress concentration. At the same time, this uniformly distributed reinforcing rib structure can effectively improve the overall rigidity of the bearing plate and reduce elastic deformation during the load-bearing process, thereby improving the leveling accuracy and stability.

[0016] Furthermore, the upper surface of the base plate is provided with an annular boss along the periphery of the receiving cavity. The height of the annular boss is less than the depth of the receiving cavity, and the inner wall of the annular boss is smoothly connected to the inner wall of the receiving cavity.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting an annular boss along the periphery of the receiving cavity on the upper surface of the base plate, and making the height of the annular boss less than the depth of the receiving cavity, the inner wall of the annular boss is smoothly connected to the inner wall of the receiving cavity, which can effectively enhance the structural strength of the area around the receiving cavity, prevent deformation or cracking of the area around the receiving cavity due to pressure when the hydraulic cylinder is working, and at the same time, the annular boss can also play a guiding role, so that the hydraulic cylinder maintains the correct position during installation and operation, and avoids displacement.

[0018] Furthermore, the angle between the outer side of the support leg and the bottom surface of the base plate is 85° to 95°, and the inner side of the support leg has an arc-shaped curved surface structure.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting the angle between the outer side of the support leg and the bottom surface of the base plate to 85° to 95°, the support leg can extend in a direction that is almost perpendicular to the base plate, thereby obtaining the best support effect and load-bearing capacity. At the same time, by designing the inner side of the support leg as an arc-shaped curved surface structure, stress concentration can be effectively reduced, the strength of the connection between the support leg and the base plate can be improved, and the fracture due to fatigue during long-term use can be prevented. In addition, the arc-shaped curved surface structure can also enhance the support rigidity of the support leg to the base plate.

[0020] Furthermore, the base plate is made of cast iron, the hydraulic cylinder body is made of alloy steel, and the pressure plate is made of carbon steel.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by using cast iron to manufacture the base plate, good load-bearing capacity and shock absorption performance can be obtained. At the same time, cast iron has low cost and good processing performance. By using alloy steel to manufacture the hydraulic cylinder body, sufficient strength and pressure resistance can be ensured, preventing deformation or leakage during high-pressure operation. By using carbon steel to manufacture the pressure plate, manufacturing costs can be reduced while ensuring sufficient strength. This material combination scheme allows each component to give full play to its own material characteristics, improving the overall performance and reliability of the device.

[0022] Furthermore, the edge thickness of the pressure plate is less than the center thickness of the pressure plate, and the pressure plate has a dish-shaped structure that gradually thins from the center to the edge.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the edge thickness of the pressure plate less than the center thickness, a disc-shaped structure that gradually thins from the center to the edge can be formed, which can effectively reduce the overall weight of the pressure plate and reduce the driving load of the hydraulic cylinder. At the same time, this disc-shaped structure can enable the pressure plate to have a certain elastic deformation capacity when bearing load, which can better adapt to the slight unevenness of the bottom surface of the support plate, improve the contact fit, and thus further improve the leveling accuracy and load-bearing stability.

[0024] Furthermore, the piston rod of the hydraulic cylinder has a threaded hole at its top end, and a bolt post is provided at the center of the bottom surface of the pressure plate. The external thread of the bolt post is connected to the internal thread of the threaded hole, and the length of the bolt post is 1 / 3 to 1 / 2 of the center thickness of the pressure plate.

[0025] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by opening a threaded hole at the top of the piston rod of the hydraulic cylinder and setting a bolt post at the center of the bottom surface of the pressure plate, the external thread of the bolt post can be connected with the internal thread of the threaded hole, thus achieving a reliable connection between the pressure plate and the piston rod of the hydraulic cylinder. At the same time, by setting the length of the bolt post to 1 / 3 to 1 / 2 of the center thickness of the pressure plate, it can be ensured that the bolt post has sufficient connection strength without affecting the overall structural strength of the pressure plate due to excessive length. This threaded connection method is convenient for installation and disassembly, and can withstand large tensile and compressive loads.

[0026] Compared with existing technologies, the beneficial effects of the hydraulic leveling pad for the support plate provided by this utility model are as follows: This utility model significantly improves the overall stability of the device by setting support legs extending downwards to form a stepped height difference at the four corners of the base plate, effectively preventing tilting or displacement during hydraulic adjustment. By setting multiple radially distributed reinforcing ribs on the support contact surface of the pressure plate, and ensuring the top surface of the reinforcing ribs is in line with the bottom surface of the support plate, the load is evenly distributed, avoiding deformation or damage caused by localized stress concentration. Simultaneously, the structural design, where the inner horizontal projection length of the support legs is greater than the outer horizontal projection length, makes the center of gravity of the overall device more stable and significantly enhances its resistance to lateral forces. The reasonable setting of the cavity depth and the interference fit connection between the hydraulic cylinder and the cavity ensure the installation stability of the hydraulic cylinder and the load-bearing capacity of the base plate. The trapezoidal cross-section design of the reinforcing ribs and the evenly distributed radial structure further improve the overall rigidity and deformation resistance of the pressure plate. The setting of the annular boss enhances the structural strength around the cavity. Through reasonable material selection and the disc-shaped structure design of the pressure plate, the weight and cost are reduced while ensuring strength. The threaded connection achieves a reliable connection between the pressure plate and the hydraulic cylinder. Overall, this utility model solves the technical problems of insufficient stability and stress concentration in the prior art, and significantly improves the leveling accuracy, load-bearing capacity and safety of use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is an example diagram of a hydraulic leveling pad for a support plate;

[0029] Figure 2 A side view of a hydraulic leveling pad for a support plate;

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 10. Base plate; 11. Receiving cavity; 12. Support leg; 20. Adjustment component; 21. Hydraulic cylinder body; 22. Pressure plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0033] like Figure 1 , Figure 2 The diagram shows an example of a hydraulic leveling pad for a support plate provided by this utility model, used to adjust the horizontal position of the support plate. It includes a base plate 10 and an adjusting assembly 20. The base plate 10 has a rectangular plate structure, and a receiving cavity 11 is formed on its upper surface. The adjusting assembly 20 includes a hydraulic cylinder 21 and a pressure plate 22. The hydraulic cylinder 21 is fixedly installed in the receiving cavity 11. The bottom surface of the pressure plate 22 is threadedly connected to the top of the piston rod of the hydraulic cylinder 21. The top surface of the pressure plate 22 is the supporting contact surface. Support legs 12 extend downwards from the four corners of the base plate 10, forming a stepped height difference between the bottom surface of the support legs 12 and the bottom surface of the base plate 10. Multiple radially distributed reinforcing ribs are provided on the supporting contact surface of the pressure plate 22, extending from the geometric center of the pressure plate 22 towards the edge. When the support plate is placed on the supporting contact surface of the pressure plate 22, the top surface of the reinforcing ribs is in line contact with the bottom surface of the support plate.

[0034] The specific operation or usage method is as follows: First, place the hydraulic leveling shims of the support plate on the ground position where leveling adjustment is required, ensuring that the four support legs of the base plate are evenly in contact with the ground. Check the flatness of the ground; if there are large undulations, preliminary leveling treatment should be performed first. Then, place the support plate to be leveled on the support contact surface of the pressure plate, ensuring that the bottom surface of the support plate is in full contact with the top surface of the reinforcing ribs on the pressure plate. By observing the horizontal state of the support plate, determine the direction and range of adjustment required. Start the hydraulic system, and by controlling the flow and pressure of the hydraulic oil, slowly raise or lower the piston rod in the hydraulic cylinder, thereby driving the pressure plate and support plate to adjust their height. During the adjustment process, a level or laser level should be used to monitor the horizontal state of the support plate in real time, and fine-tune the hydraulic pressure according to the monitoring results. Press the hydraulic system until the support plate reaches the required horizontal position, then maintain stable hydraulic system pressure to lock the device. During use, regularly check the hydraulic system's sealing to ensure there are no leaks. Also check the threaded connection between the pressure plate and the hydraulic cylinder piston rod for tightness. Check the contact between the support legs and the ground; if poor contact is found between the bottom of the support legs and the ground, adjust them promptly or add leveling pads under the support legs. After leveling, if the device needs to be moved, first release the hydraulic system pressure to lower the pressure plate to its initial position, then move the device as a whole. During long-term use, regularly maintain the hydraulic cylinder to ensure the piston rod surface is clean and free of rust. Regularly inspect threaded connections and apply appropriate grease to prevent thread corrosion from affecting disassembly.

[0035] In the above technical solution, the horizontal projection length of the support leg 12 along the inner side of the corner of the base plate 10 is greater than the horizontal projection length of the support leg 12 along the outer side of the corner of the base plate 10.

[0036] Furthermore, in the above technical solution, the depth of the receiving cavity 11 is 1 / 2 to 2 / 3 of the thickness of the base plate 10, and the outer circumferential surface of the hydraulic cylinder body 21 is connected to the inner wall of the receiving cavity 11 by an interference fit.

[0037] Furthermore, in the above technical solution, the cross-section of the reinforcing rib is trapezoidal, and the width of the upper base of the trapezoidal structure is smaller than the width of the lower base.

[0038] Furthermore, in the above technical solution, the support contact surface of the pressure plate 22 is provided with 6 to 8 reinforcing ribs, and the included angle between two adjacent reinforcing ribs is equal.

[0039] Furthermore, in the above technical solution, the upper surface of the base plate 10 is provided with an annular boss along the periphery of the receiving cavity 11. The height of the annular boss is less than the depth of the receiving cavity 11, and the inner wall of the annular boss is smoothly connected to the inner wall of the receiving cavity 11.

[0040] Furthermore, in the above technical solution, the angle between the outer side of the support leg 12 and the bottom surface of the base plate 10 is 85° to 95°, and the inner side of the support leg 12 has an arc-shaped curved surface structure.

[0041] Furthermore, in the above technical solution, the base plate 10 is made of cast iron, the hydraulic cylinder body 21 is made of alloy steel, and the pressure plate 22 is made of carbon steel.

[0042] Furthermore, in the above technical solution, the edge thickness of the pressure plate 22 is less than the center thickness of the pressure plate 22, and the pressure plate 22 has a dish-shaped structure that gradually thins from the center to the edge.

[0043] Furthermore, in the above technical solution, the piston rod of the hydraulic cylinder 21 is provided with a threaded hole at the top, and a bolt post is provided at the center of the bottom surface of the pressure plate 22. The external thread of the bolt post is connected to the internal thread of the threaded hole, and the length of the bolt post is 1 / 3 to 1 / 2 of the center thickness of the pressure plate 22.

[0044] Specific Embodiment 1: In this embodiment, the base plate of the hydraulic leveling pad is made of HT250 gray cast iron. The base plate is 320mm long, 280mm wide, and 45mm thick. A circular cavity with a diameter of 120mm and a depth of 28mm is formed on the upper surface of the base plate. The cavity is located at the geometric center of the base plate. The inner wall surface of the cavity is precision machined to a surface roughness of Ra3.2. Support legs extend downward from the four corners of the base plate, each with a height of 35mm. The angle between the outer side of the support leg and the bottom surface of the base plate is 90 degrees. The horizontal projection length of the support leg along the inner direction of the corner of the base plate is 55mm. The horizontal projection length in the outer direction is 42mm. The inner side of the support leg has an arc-shaped curved surface structure with a radius of 18mm. The bottom end face of the support leg is ground to ensure that the bottom end faces of the four support legs are in the same plane. The hydraulic cylinder body is made of 40Cr alloy steel, with an outer diameter of 119.8mm, forming an interference fit of 0.2mm with the inner diameter of the receiving cavity. The hydraulic cylinder body is installed in the receiving cavity by press fitting. The working stroke of the hydraulic cylinder body is 50mm, and the maximum load capacity is 100kN. The piston rod of the hydraulic cylinder body is made of 45# carbon steel, with a diameter of 35mm. The top of the piston rod has an M24 internal thread hole with a depth of 30mm. The pressure plate is made of Q345 carbon steel, with an outer diameter of 240mm, a thickness of 28mm at the center, and 18mm at the edges, forming a dish-shaped structure that gradually thins from the center to the edges. The radius of curvature of the dish is 800mm. A bolt post is located at the center of the bottom surface of the pressure plate. The bolt post has an outer diameter of 24mm, an M24 external thread, and a length of 12mm. The bolt post connects to the threaded hole at the top of the piston rod of the hydraulic cylinder, with a connection torque of 80Nm. Eight reinforcing ribs are evenly distributed on the support contact surface of the pressure plate, extending radially from the geometric center of the pressure plate towards the edges. The included angle between two adjacent reinforcing ribs is 45 degrees, and the length of each reinforcing rib is 95mm. The cross-section of the rib is trapezoidal, with an upper base width of 3mm and a lower base width of 12mm. The height of the reinforcing rib is 6mm. The top surface of the reinforcing rib is precision ground to a surface roughness of Ra1.6. An annular boss is provided on the upper surface of the base plate along the periphery of the receiving cavity. The outer diameter of the annular boss is 160mm, the inner diameter is 130mm, and the height is 8mm. The inner wall of the annular boss and the inner wall of the receiving cavity are connected by a rounded transition with a radius of 5mm. In practical applications, the hydraulic leveling pad of the support plate in this embodiment can withstand a maximum static load of 150kN. The height adjustment accuracy under a 50kN load reaches 0.05mm. The overall device has an anti-overturning safety factor greater than 2 when subjected to eccentric loads.5. The hydraulic system operates at a pressure of 16 MPa, uses No. 46 anti-wear hydraulic oil, and has an operating temperature range of -10℃ to 60℃.

[0045] Specific Embodiment 2: This Embodiment 2 is based on Embodiment 1, but improves the inner surface of the four support legs of the base plate from a single arc-shaped curved surface structure to a double-curvature composite curved surface structure. Specifically, the upper half of the inner surface of the support leg adopts a convex arc surface with a radius of 25mm, and the lower half adopts a concave arc surface with a radius of 15mm. The two arcs are smoothly connected at the midpoint of the support leg height. This double-curvature composite curved surface structure can further optimize the stress distribution at the connection between the support leg and the base plate, making the stress transfer from the support leg to the base plate more uniform. At the same time, the number of reinforcing ribs on the bearing plate is increased to 10, and the included angle between two adjacent reinforcing ribs is increased. Adjusting the angle to 36 degrees, the upper base width of the trapezoidal cross-section of the reinforcing rib is reduced to 2.5mm, while the lower base width remains unchanged at 12mm, and the height is increased to 7mm. This improvement increases the number of line contact points between the pressure plate and the support plate, making the contact more uniform and further improving the load-bearing capacity and leveling accuracy. At the same time, the height of the annular boss is increased to 10mm, and the radius of the transition arc between the inner sidewall and the inner wall of the receiving cavity is increased to 8mm, enhancing the deformation resistance of the area surrounding the receiving cavity. The improved scheme of this embodiment increases the overturning safety factor of the overall device under eccentric load to over 3.0, and the height adjustment accuracy to 0.03mm.

[0046] Specifically, the principle of this utility model is as follows: By setting downwardly extending support legs at the four corners of the base plate, and creating a stepped height difference between the bottom surface of the support legs and the bottom surface of the base plate, the supporting base area of ​​the device is increased from a mechanical perspective, while the overall center of gravity is lowered. According to the principle of stability, the larger the supporting base area and the lower the center of gravity, the stronger the device's anti-overturning ability. By making the horizontal projection length of the support legs along the inner direction of the base plate corners greater than the horizontal projection length along the outer direction, an inwardly inclined support structure is formed. This structure causes the support legs to generate an inward component force on the central area of ​​the base plate, further enhancing the overall stability. By setting multiple radially distributed reinforcing ribs on the support contact surface of the bearing plate, and making the top surface of the reinforcing ribs in line contact with the bottom surface of the support plate, the original surface contact is transformed into multiple line contacts from the principle of contact mechanics. According to Hertzian contact theory, line contact can more effectively disperse stress than surface contact, avoiding local stress concentration. At the same time, the radially distributed reinforcing ribs can further enhance the load-bearing capacity of the device. The load is evenly distributed across the entire surface of the bearing plate in multiple directions. According to the principle of force superposition, this multi-directional force transmission method makes the bearing plate more uniformly stressed. By designing the reinforcing ribs as trapezoidal structures with a wide bottom and narrow top, based on the bending theory in mechanics of materials, this structure can ensure line contact at the top while giving the bottom a larger section modulus of bending resistance, thereby improving the bending strength of the reinforcing ribs. By setting a receiving cavity on the base plate and installing the hydraulic cylinder body using an interference fit, according to the interference fit principle, the compressive stress generated by the interference can make the hydraulic cylinder body and the base plate tightly bonded, forming an integral structure, effectively preventing loosening under hydraulic pressure. By setting an annular boss around the receiving cavity, according to the principle of structural mechanics, the boss structure can increase the section modulus around the receiving cavity, improving bending and torsional resistance. By using a disc-shaped bearing plate, according to thin plate theory, this structure can produce a certain amount of elastic deformation when bearing load, thereby better adapting to the slight unevenness of the bottom surface of the support plate and improving the contact fit.

Claims

1. A hydraulic leveling pad for adjusting the horizontal position of a support plate, comprising a base plate and an adjusting assembly, wherein the base plate is a rectangular plate structure, and a receiving cavity is formed on the upper surface of the base plate; the adjusting assembly comprises a hydraulic cylinder and a pressure plate, wherein the hydraulic cylinder is fixedly installed in the receiving cavity; the bottom surface of the pressure plate is threadedly connected to the top end of the piston rod of the hydraulic cylinder; and the top surface of the pressure plate serves as a supporting contact surface. The four corners of the base plate extend downward to form support legs. The bottom surface of the support legs forms a stepped height difference with the bottom surface of the base plate. The support contact surface of the pressure plate is provided with multiple radially distributed reinforcing ribs. The reinforcing ribs extend from the geometric center of the pressure plate to the edge. When the support plate is placed on the support contact surface of the pressure plate, the top surface of the reinforcing ribs is in line contact with the bottom surface of the support plate.

2. The hydraulic leveling pad for a support plate according to claim 1, characterized in that, The horizontal projection length of the support leg along the inner side of the corner of the base plate is greater than the horizontal projection length of the support leg along the outer side of the corner of the base plate.

3. The hydraulic leveling pad for a support plate according to claim 2, characterized in that, The depth of the receiving cavity is 1 / 2 to 2 / 3 of the thickness of the base plate, and the outer circumferential surface of the hydraulic cylinder body is connected to the inner wall of the receiving cavity by an interference fit.

4. The hydraulic leveling pad for a support plate according to claim 3, characterized in that, The cross-section of the reinforcing rib is trapezoidal, and the width of the upper base of the trapezoidal structure is smaller than the width of the lower base.

5. A hydraulic leveling pad for a support plate according to claim 4, characterized in that, The bearing plate has 6 to 8 reinforcing ribs on its supporting contact surface, and the included angle between two adjacent reinforcing ribs is equal.

6. The hydraulic leveling pad for a support plate according to claim 5, characterized in that, The upper surface of the base plate is provided with an annular boss along the periphery of the receiving cavity. The height of the annular boss is less than the depth of the receiving cavity, and the inner wall of the annular boss is smoothly connected to the inner wall of the receiving cavity.

7. A hydraulic leveling pad for a support plate according to claim 6, characterized in that, The angle between the outer side of the support leg and the bottom surface of the base plate is 85° to 95°, and the inner side of the support leg has an arc-shaped curved surface structure.

8. A hydraulic leveling pad for a support plate according to claim 7, characterized in that, The base plate is made of cast iron, the hydraulic cylinder body is made of alloy steel, and the pressure plate is made of carbon steel.

9. A hydraulic leveling pad for a support plate according to claim 8, characterized in that, The edge thickness of the pressure plate is less than the center thickness of the pressure plate, and the pressure plate has a dish-shaped structure that gradually thins from the center to the edge.

10. A hydraulic leveling pad for a support plate according to claim 9, characterized in that, The piston rod of the hydraulic cylinder has a threaded hole at its top end, and a bolt post is provided at the center of the bottom surface of the pressure plate. The external thread of the bolt post is connected to the internal thread of the threaded hole, and the length of the bolt post is 1 / 3 to 1 / 2 of the center thickness of the pressure plate.

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