Four-degree-of-freedom self-adapting adjusting cushion block and stabilizing support method

Abstract

The application discloses a four-degree-of-freedom self-adaptive adjusting cushion block and stabilizing supporting method, which comprises the following steps: 1) placing a supporting object on the spherical table of N adjusting cushion blocks; 2) rotating each push bolt according to the posture requirement of the supporting object, driving the wedge-shaped block to move in the horizontal direction, driving the ball socket to move up and down, and adjusting the articulation of each spherical table in the ball socket; and 3) after the posture of the supporting object is adjusted in place, filling the gap formed by the spherical table, the ball socket and the upper supporting pad with positioning glue through the glue injection hole and the glue dispensing groove. The spherical table-ball socket structure in the cushion block of the method can realize three-degree-of-freedom self-adaptive adjustment, the double-sided wedge-shaped block structure can realize one-degree-of-freedom lifting, the over-constrained internal force of each contact surface of the cushion block in the supporting process is effectively eliminated, the contact area of each contact surface is maximized, the supporting stiffness, precision, efficiency and stability are improved, and the four-degree-of-freedom self-adaptive adjustment and stabilizing supporting can be automatically realized.

Description

Technical Field

[0001] This invention relates to a four-degree-of-freedom adaptive adjustment pad and a stable support method. Background Technology

[0002] Currently, common pads mainly include flat pads, inclined pads, wedge pads, etc. This type of pad can only achieve single-degree-of-freedom positional restriction and support. During use, the pad is placed under the supported object to achieve unidirectional restriction of the object. Once the supported object is fixed, the pad is locked.

[0003] However, in practical applications, restricting an object is not limited to fixing and supporting only one degree of freedom; it is impossible to control the supported object at a certain angle. When multiple degrees of freedom need to be restricted and supported, multiple or different types of pads are required to meet the desired purpose and requirements.

[0004] Therefore, it is necessary to develop a pad structure that can satisfy multiple degrees of freedom of adjustment. Summary of the Invention

[0005] The purpose of this invention is to provide a four-degree-of-freedom adaptive adjustment pad and a stable support method to solve the problems existing in the prior art.

[0006] The technical solution adopted to achieve the purpose of this invention is as follows: a four-degree-of-freedom adaptive adjustment pad and a stable support method, based on an adjustment pad, which includes a ball table, a ball socket, a mounting base plate, an upper support pad, a wedge block and a pushing bolt, all arranged in a spatial rectangular coordinate system O-XYZ. The plane XOY is parallel to the horizontal plane, and the Y direction is consistent with the vertical direction.

[0007] The mounting base plate has a cavity for mounting the ball socket, upper support pad and wedge block. The upper end of the cavity is open, and the bottom surface of the cavity is an inclined plane I in the X direction. The angle between the inclined plane I and the positive X-axis is 180-θ.

[0008] The mounting base plate has an injection hole and a vertical strip hole on its side wall. Both the strip hole and the injection hole penetrate the inner and outer sides of the cavity, and the lower end of the strip hole is close to the lowest point of the bottom surface of the cavity.

[0009] The wedge block is installed on the bottom surface of the cavity, the upper support plate is installed on the wedge block, the ball socket is installed on the upper support plate, the upper surface of the ball socket extends out of the cavity, and the ball table is installed inside the ball socket.

[0010] The lower surface of the wedge block is inclined plane II, which matches and fits with inclined plane I.

[0011] The upper surface of the wedge block is inclined plane Ⅲ, and the lower surface of the upper support pad is inclined plane Ⅳ. Inclined plane Ⅲ and inclined plane Ⅳ match and fit together. Inclined plane Ⅳ is an inclined plane in the X direction, and the angle between inclined plane Ⅳ and the positive X-axis is θ.

[0012] The upper support pad has a dispensing groove, one end of which penetrates the upper surface of the upper support pad, and the other end penetrates the side wall of the upper support pad and connects with the dispensing hole.

[0013] The wedge block has a threaded hole on the side facing the strip hole. One end of the push bolt passes through the strip hole and is screwed into the threaded hole of the wedge block. Two axial limiting washers are provided on the push bolt, and the two axial limiting washers contact the inner and outer walls of the mounting base plate, respectively.

[0014] The four-degree-of-freedom adaptive adjustment pad and stable support method includes the following steps:

[0015] 1) Place the support object on the ball table of N adjustment pads.

[0016] 2) According to the posture requirements of the supported object, rotate each push bolt to drive the wedge block to move horizontally, drive the ball socket to move up and down, and adjust each ball table to hinge in the ball socket.

[0017] 3) After the posture of the supported object is adjusted to the correct position, fill the gap between the ball table, the ball socket and the upper support pad with positioning glue through the glue injection hole and glue dispensing groove.

[0018] Furthermore, the push bolt has two annular grooves for installing axial limiting washers. The two annular grooves are arranged at intervals and the distance between them is equal to the thickness of the side wall of the mounting base plate.

[0019] The outer diameter of the axial limiting washer is greater than the width of the strip hole, and the inner diameter of the axial limiting washer is greater than the diameter of the annular groove and smaller than the outer diameter of the push bolt.

[0020] The two axial limiting washers are respectively installed in the two annular grooves on the push bolt. When the push bolt is rotated, the axial limiting washers constrain the push bolt to move axially by the supporting force of the side wall of the mounting base plate, and push the bolt to move up and down along the strip hole.

[0021] Furthermore, the angle θ between the inclined plane IV and the positive X-axis is 6° to 8°.

[0022] Furthermore, the lower end of the strip-shaped hole is U-shaped.

[0023] Furthermore, the compressive strength of the cured positioning adhesive is ≥140MPa, and the curing shrinkage rate is ≤0.2%.

[0024] The technical effects of this invention are undeniable. The ball-and-socket structure in the pad used in this invention can achieve three-degree-of-freedom adaptive adjustment, and the double-sided wedge block structure can achieve one-degree-of-freedom lifting. This effectively eliminates the over-constraint internal forces on each contact surface of the pad during the support process, maximizes the contact area of ​​each contact surface, and improves the support stiffness, accuracy, efficiency and stability. It can automatically achieve four-degree-of-freedom adaptive adjustment and stable support. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the pad block described in this invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the pad block described in this invention;

[0027] Figure 3 This is a schematic diagram of the force applied to the pad block described in this invention;

[0028] Figure 4 This invention relates to the application of the pad block in the stable support of large structural components.

[0029] In the diagram: 1. Table tennis table; 2. Ball socket; 3. Mounting base plate; 301. Cavity; 302. Strip hole; 303. Glue injection hole; 4. Upper support pad; 5. Wedge block; 6. Push bolt; 6. Axial limiting washer; 601. Glue dispensing groove; 7. Detailed Implementation

[0030] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0031] Example 1:

[0032] This embodiment discloses a four-degree-of-freedom adaptive adjustment pad and a stable support method, based on an adjustment pad, see [link to documentation]. Figure 1 The adjusting pad includes a ball table 1, a ball socket 2, a mounting base plate 3, an upper support pad 4, a wedge block 5, and a pushing bolt 6, all set in a spatial rectangular coordinate system O-XYZ. The plane XOY is parallel to the horizontal plane, and the Y direction is consistent with the vertical direction.

[0033] See Figure 2 Alternatively, the mounting base plate 3 has a cavity 301 for mounting the ball socket 2, the upper support pad 4, and the wedge block 5. The upper end of the cavity 301 is open, and the bottom surface of the cavity 301 is an inclined plane I in the X direction. The angle between the inclined plane I and the positive X-axis is 180-θ.

[0034] The mounting base plate 3 has an injection hole 303 and a vertical strip hole 302 on its side wall. Both the strip hole 302 and the injection hole 303 penetrate the inner and outer sides of the cavity 301. The lower end of the strip hole 302 is close to the lowest point of the bottom surface of the cavity 301, and the lower end of the strip hole 302 is U-shaped.

[0035] The wedge block 5 is installed on the bottom surface of the cavity 301, the upper support plate 4 is installed on the wedge block 5, the ball socket 2 is installed on the upper support plate 4, the upper surface of the ball socket 2 extends out of the cavity 301, and the ball table 1 is installed inside the ball socket 2.

[0036] The lower surface of the wedge block 5 is inclined plane II, which matches and fits with inclined plane I.

[0037] The upper surface of the wedge block 5 is inclined surface III, and the lower surface of the upper support plate 4 is inclined surface IV. Inclined surface III and inclined surface IV are matched and fit together. Inclined surface IV is an inclined surface in the X direction. See [reference needed]. Figure 3 The angle between the inclined plane IV and the positive X-axis is θ, and the value of θ is 6° to 8°.

[0038] The upper support pad 4 has a dispensing groove 7. One end of the dispensing groove 7 passes through the upper surface of the upper support pad 4, and the other end passes through the side wall of the upper support pad 4 and is connected to the dispensing hole 303.

[0039] The wedge block 5 has a threaded hole on the side facing the strip hole 302. One end of the push bolt 6 passes through the strip hole 302 and is screwed into the threaded hole of the wedge block 5. The connection between the push bolt 6 and the wedge block 5 forms a connection structure similar to a nut-screw, and the axial rotation of the push bolt 6 is converted into the linear motion of the wedge block 5.

[0040] The push bolt 6 has two annular grooves for installing the axial limiting washer 601. The two annular grooves are arranged at intervals and the distance between them is the thickness of the side wall of the mounting base plate 3.

[0041] The outer diameter of the axial limiting washer 601 is greater than the width of the strip hole 302, and the inner diameter of the axial limiting washer 601 is greater than the diameter of the annular groove and smaller than the outer diameter of the push bolt 6.

[0042] The two axial limiting washers 601 are respectively installed in the two annular grooves on the push bolt 6, and the two axial limiting washers 601 are in contact with the inner and outer walls of the mounting base plate 3.

[0043] The four-degree-of-freedom adaptive adjustment pad and stable support method includes the following steps:

[0044] 1) Place the support object on the ball table 1 of the N adjustment pads.

[0045] 2) According to the posture requirements of the supported object, rotate each pushing bolt 6 to drive the wedge block 5 to move horizontally, causing inclined plane II to move relative to inclined plane I, and inclined plane III to move relative to inclined plane IV, driving the ball socket 2 to move up and down, adjusting the hinge of each ball table 1 within the ball socket 2. When rotating the pushing bolt 6, the axial limiting washer 601 constrains the pushing bolt 6 to move axially through the supporting force of the side wall of the mounting base plate 3, causing the pushing bolt 6 to move up and down along the strip hole 302. The three degrees of freedom of the ball table-ball socket structure can adaptively compensate for the non-parallelism between the supported object and the ground.

[0046] 3) After the posture of the supported object is adjusted to the correct position, positioning glue is filled into the gap formed by the ball table 1, the ball socket 2 and the upper support pad 4 through the glue injection hole 303 and the glue dispensing groove 7.

[0047] The push bolt 6 can be adjusted by 1mm in the X direction and 2*tanθ in the Z direction, so that the support surface of the pad block ball table and the bottom surface of the supported object can quickly converge. The wedge block 5 has a self-locking function as shown in formula (1), where μ is the friction coefficient of the wedge block 5, G is the supported gravity, fs is the maximum static friction force of the wedge block 5, α is the friction angle, and N is the number of adjustment pads.

[0048] μGcosα<fs (1)

[0049] The aforementioned four-degree-of-freedom adaptive pad can be used to support an object at N points, where N ≥ 3. For support stability, see [link to documentation]. Figure 4 In this embodiment, N=4, the support object is a cuboid in shape, and four pads are located at the four corners of the support object. The widths of the lower surface of the support object are a and b, respectively. The vertical projection of the center of gravity P of the support object is within a 1:n (n<5) small quadrilateral within the quadrilateral of the four-branch support points. The height h of the center of gravity P of the support object from the ground is less than n times the average side length of the quadrilateral of the four-branch support points, so that the height of the support object under the action of the support pads has high stability. As shown in the following formulas (2), (3), (4), where F is the Z-direction force of the pad, A is the projected area of ​​the wedge block bearing surface on the horizontal plane, σ is the pressure borne by the wedge block, E is the elastic modulus of the wedge block, ε is the strain of the wedge block, ΔL and L are the Z-direction deformation and original size of the wedge block, respectively, ω is the natural frequency of the pad, and M is the mass of the pad. Because the wedge block 5 has a large bearing surface, the internal stress generated between the pad block and the supported object is small, and the amount of plastic deformation is small, thus the support stiffness is high, the natural frequency is high, and the stability of the pad block support is improved.

[0050] σ=F / A=Eε=EΔL / L (2)

[0051] K=F / ΔL (3)

[0052]

[0053] In addition, after the pad and the supported object have been adjusted for support, TONSNNTS355 high-precision positioning adhesive can be injected through the dispensing groove of the pad to fix the ball table-socket structure. This positioning adhesive has high compressive strength and very low curing shrinkage rate, with a compressive strength ≥140MPa and a curing shrinkage rate ≤0.2%. It can also effectively increase the effective contact area between the pad and the ball table, thereby further promoting the stable support effect of the pad on large structural components.

[0054] It is worth noting that the ball-and-socket structure in the pad used in the method of the present invention can achieve three degrees of freedom adaptive adjustment, and the double-sided wedge block structure can achieve one degree of freedom lifting. This effectively eliminates the over-constraint internal force of each contact surface of the pad during the support process, maximizes the contact area of ​​each contact surface, and improves the support stiffness, accuracy, efficiency and stability. It can automatically achieve four degrees of freedom adaptive adjustment and stable support, and solves the defect that the existing pad can only achieve one or two degrees of freedom.

[0055] Example 2:

[0056] This embodiment discloses a four-degree-of-freedom adaptive adjustment pad and a stable support method, based on an adjustment pad, see [link to documentation]. Figure 1 The adjusting pad includes a ball table 1, a ball socket 2, a mounting base plate 3, an upper support pad 4, a wedge block 5, and a pushing bolt 6, all set in a spatial rectangular coordinate system O-XYZ. The plane XOY is parallel to the horizontal plane, and the Y direction is consistent with the vertical direction.

[0057] See Figure 2 Alternatively, the mounting base plate 3 has a cavity 301 for mounting the ball socket 2, the upper support pad 4, and the wedge block 5. The upper end of the cavity 301 is open, and the bottom surface of the cavity 301 is an inclined plane I in the X direction. The angle between the inclined plane I and the positive X-axis is 180-θ.

[0058] The mounting base plate 3 has an injection hole 303 and a vertical strip hole 302 on its side wall. Both the strip hole 302 and the injection hole 303 penetrate the inner and outer sides of the cavity 301. The lower end of the strip hole 302 is close to the lowest point of the bottom surface of the cavity 301.

[0059] The wedge block 5 is installed on the bottom surface of the cavity 301, the upper support plate 4 is installed on the wedge block 5, the ball socket 2 is installed on the upper support plate 4, the upper surface of the ball socket 2 extends out of the cavity 301, and the ball table 1 is installed inside the ball socket 2.

[0060] The lower surface of the wedge block 5 is inclined plane II, which matches and fits with inclined plane I.

[0061] The upper surface of the wedge block 5 is inclined surface III, and the lower surface of the upper support plate 4 is inclined surface IV. Inclined surface III and inclined surface IV are matched and fit together. Inclined surface IV is an inclined surface in the X direction. See [reference needed]. Figure 3 The angle between the inclined plane IV and the positive X-axis is θ.

[0062] The upper support pad 4 has a dispensing groove 7. One end of the dispensing groove 7 passes through the upper surface of the upper support pad 4, and the other end passes through the side wall of the upper support pad 4 and is connected to the dispensing hole 303.

[0063] The wedge block 5 has a threaded hole on the side facing the strip hole 302. One end of the push bolt 6 passes through the strip hole 302 and is screwed into the threaded hole of the wedge block 5. The push bolt 6 is provided with two axial limiting washers 601, which contact the inner and outer walls of the mounting base plate 3 respectively.

[0064] The four-degree-of-freedom adaptive adjustment pad and stable support method includes the following steps:

[0065] 1) Place the support object on the ball table 1 of the N adjustment pads.

[0066] 2) According to the posture requirements of the supported object, rotate each push bolt 6 to drive the wedge block 5 to move in the horizontal direction, drive the ball socket 2 to move up and down, and adjust each ball table 1 to hinge in the ball socket 2.

[0067] 3) After the posture of the supported object is adjusted to the correct position, positioning glue is filled into the gap formed by the ball table 1, the ball socket 2 and the upper support pad 4 through the glue injection hole 303 and the glue dispensing groove 7.

[0068] Example 3:

[0069] The main steps of this embodiment are the same as those of embodiment 2. In addition, the push bolt 6 is provided with two annular grooves for the installation of the axial limiting washer 601. The two annular grooves are arranged at intervals and the distance between them is the thickness of the side wall of the mounting base plate 3.

[0070] The outer diameter of the axial limiting washer 601 is greater than the width of the strip hole 302, and the inner diameter of the axial limiting washer 601 is greater than the diameter of the annular groove and smaller than the outer diameter of the push bolt 6.

[0071] The two axial limiting washers 601 are respectively installed in the two annular grooves on the push bolt 6. When the push bolt 6 is rotated, the axial limiting washers 601 constrain the push bolt 6 to move axially by the supporting force of the side wall of the mounting base plate 3, and push the bolt 6 to move up and down along the strip hole 302.

[0072] Example 4:

[0073] The main steps of this embodiment are the same as those of embodiment 2. Furthermore, the angle θ between the inclined plane IV and the positive X-axis is 6° to 8°.

[0074] Example 5:

[0075] The main steps of this embodiment are the same as those of embodiment 2. In addition, the lower end of the strip hole 302 is U-shaped.

[0076] Example 6:

[0077] The main steps in this embodiment are the same as in embodiment 2. Furthermore, the compressive strength of the cured positioning adhesive is ≥140MPa and the curing shrinkage rate is ≤0.2%.

Claims

1. A stable support method based on a four-degree-of-freedom adaptive adjustment pad, characterized in that, Based on an adjusting pad, the adjusting pad includes a ball table (1), a ball socket (2), a mounting base plate (3), an upper support pad (4), a wedge block (5), and a push bolt (6) set in a spatial rectangular coordinate system O-XYZ. The plane XOY is parallel to the horizontal plane, and the Y direction is consistent with the vertical direction. The mounting base plate (3) has a cavity (301) for mounting the ball socket (2), the upper support pad (4), and the wedge block (5). The upper end of the cavity (301) is open, and the bottom surface of the cavity (301) is an inclined plane I in the X direction, with the angle between the inclined plane I and the positive X-axis being 180°. ; The mounting base plate (3) has an injection hole (303) and a vertical strip hole (302) on its side wall. Both the strip hole (302) and the injection hole (303) penetrate the inner and outer sides of the cavity (301). The lower end of the strip hole (302) is close to the lowest point of the bottom surface of the cavity (301). The wedge block (5) is installed on the bottom surface of the cavity (301), the upper support pad (4) is installed on the wedge block (5), the ball socket (2) is installed on the upper support pad (4), the upper surface of the ball socket (2) extends out of the cavity (301), and the ball table (1) is installed inside the ball socket (2). The lower surface of the wedge block (5) is inclined plane II, which matches and fits with inclined plane I; The upper surface of the wedge block (5) is inclined plane III, and the lower surface of the upper support plate (4) is inclined plane IV. Inclined plane III and inclined plane IV are matched and fit together. Inclined plane IV is an inclined plane in the X direction, and the angle between inclined plane IV and the positive X-axis is . ; The upper support pad (4) has a dispensing groove (7) with one end penetrating the upper surface of the upper support pad (4) and the other end penetrating the side wall of the upper support pad (4) and connecting with the dispensing hole (303). The wedge block (5) has a threaded hole on the side facing the strip hole (302). One end of the push bolt (6) passes through the strip hole (302) and is screwed into the threaded hole of the wedge block (5). Two axial limiting washers (601) are provided on the push bolt (6). The two axial limiting washers (601) contact the inner and outer walls of the mounting base plate (3) respectively. The stable support method based on four-degree-of-freedom adaptive adjustment pads includes the following steps: 1) Place the support object on the table (1) of N adjustment pads; 2) According to the posture requirements of the supported object, rotate each push bolt (6) to drive the wedge block (5) to move in the horizontal direction, drive the ball socket (2) to move up and down, and adjust each ball table (1) to hinge in the ball socket (2); 3) After the posture of the supported object is adjusted to the correct position, fill the gap formed by the ball table (1), the ball socket (2) and the upper support pad (4) through the glue injection hole (303) and the glue dispensing groove (7) with positioning glue.

2. The stable support method based on a four-degree-of-freedom adaptive adjustment pad according to claim 1, characterized in that: The push bolt (6) has two annular grooves for installing the axial limiting washer (601). The two annular grooves are arranged at intervals and the distance between them is the thickness of the side wall of the mounting base plate (3). The outer diameter of the axial limiting washer (601) is greater than the width of the strip hole (302), and the inner diameter of the axial limiting washer (601) is greater than the diameter of the annular groove and smaller than the outer diameter of the push bolt (6). The two axial limiting washers (601) are respectively installed on the two annular grooves of the push bolt (6). When the push bolt (6) is rotated, the axial limiting washers (601) constrain the push bolt (6) to make axial movement by the supporting force of the side wall of the mounting base plate (3), and the push bolt (6) moves up and down along the strip hole (302).

3. The stable support method based on a four-degree-of-freedom adaptive adjustment pad according to claim 1, characterized in that: The angle between the inclined plane IV and the positive X-axis The value ranges from 6° to 8°.

4. The stable support method based on a four-degree-of-freedom adaptive adjustment pad according to claim 1, characterized in that: The lower end of the strip hole (302) is U-shaped.

5. The stable support method based on a four-degree-of-freedom adaptive adjustment pad according to claim 1, characterized in that: The cured positioning adhesive has a compressive strength ≥140MPa and a curing shrinkage rate ≤0.2%.

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