Self-locking height-adjustable supporting device

Abstract

The invention discloses a self-locking height-adjustable supporting device. A wedge-shaped block is arranged in a square inner cavity of a base body; the ejector rod is mounted in the stepped round hole of the base body, the upper end is fixed in the center hole of the supporting plate, and the lower end is propped against the bottom surface of the wedge block limiting groove; the rectangular spring is sleeved outside the ejector rod and is arranged between the gear step and the base body step; the screw rod is rotatably fixed in the open slot on the side surface of the base body, and the inner end of the screw rod is fixed in the mounting hole on the side surface of the wedge block; the two guide columns are installed in the guide holes of the base body, the upper ends of the guide columns are fixed to the bottom face of the supporting plate, and the outer circles of the guide columns are sleeved with clamping bushes. Oil cavities I and II between the clamping bush and the guide hole wall are communicated with an oil way III through an oil way I and an oil way II respectively, and the oil way III is communicated with an oil way IV and is connected with an external oil supply system; the digital display displacement sensor is fixed on the side surface of the supporting plate; supporting nails are fixed to the upper end face of the supporting plate. According to the device, precise adjustment of workpiece supporting can be achieved, visualization can be achieved, and the reliable locking and maintaining capacity is further achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of supporting device manufacturing, and relates to a self-locking height-adjustable supporting device. Background Art

[0002] Fixed support is a widely used type of support in the field of support devices. However, in some special use scenarios, such as rockets, airplanes and other aircraft, some parts require the weight to be as light as possible. Because these parts are castings, the weight of the blanks of these parts needs to be controlled, so the blank workpiece has a very small processing allowance. To ensure the processing of the blank workpiece, it is necessary to achieve precise adjustment of the workpiece support and visualize it, as well as reliable locking and holding capabilities. Existing support devices cannot meet the above requirements, resulting in a low pass rate for processed parts. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems existing in the prior art and to provide a self-locking adjustable height support device, which can realize precise adjustment of the workpiece support and can be visualized, and also has reliable locking and holding capabilities.

[0004] To achieve the above purpose, the technical solution of the present invention is: a self-locking adjustable height support device, including a base, a base, a push rod, a rectangular spring, a wedge block, two guide columns, a clamping bushing, a support plate, a support pin, a digital displacement sensor and a screw; the base is fixed on the base; The center of the base is provided with a center hole with a stepped circular hole at the upper end and a square inner cavity at the lower end; a mounting hole with a through hole at the inner end and a threaded hole on the wall is opened on the side of the wedge-shaped block, and a limiting groove with an inclined bottom surface in the same direction as the mounting hole is opened on its upper end surface, which is placed in the square inner cavity of the base; the outer circle of the push rod is a reducing circle, and the lower end surface is an inclined surface with the same slope as the inclined surface of the limiting groove, and the diameter of the lower end is matched with the clearance of the limiting groove of the wedge-shaped block, and the outer circle of the lower end is provided with a shift step of a spring matching the stepped circular hole of the base, which is installed in the stepped circular hole of the base, the upper end is fixed in the center hole of the support plate, and the lower end is embedded in the limiting groove of the wedge block and connected to the bottom surface of the limiting groove; the rectangular spring is sleeved outside the push rod and installed between the shift step and the step of the stepped circular hole of the base; the screw rod can be rotatably fixed in the open groove opened on the side of the base, and its inner end is threadedly fixed in the mounting hole on the side of the wedge block; Two guide holes are symmetrically opened on both sides of the base relative to the center hole thereof, and two guide columns are respectively installed in the guide holes, and their upper ends are fixed on the bottom surface of the support plate, and the outer circles thereof are respectively covered with clamping bushings whose two ends are sealed and fixed to the base; oil chamber I and oil chamber II are respectively arranged between the clamping bushing and the guide hole wall, and oil circuits I, II and III are arranged in the base; oil chamber I is connected to oil circuit III through oil circuit I, oil chamber II is connected to oil circuit III through oil circuit II, and oil circuit III is connected to oil circuit IV arranged on the base and connected to the external oil supply system; an upper end cover which is covered on the guide column and fixed on the base is fixed in the guide hole at the upper end of the clamping bushing; The digital display displacement sensor is fixed on the side of the support plate; the support nail is fixed in a threaded hole opened on a raised base on the upper surface of the support plate that protrudes away from one end of the digital display displacement sensor.

[0005] Further preferably, the specific structure of the screw being rotatably fixed in the open groove on the side of the base is: the screw is provided with an inner concave snap-fit ​​groove matching the open groove of the base, the adjusting gasket is sleeved in the inner concave snap-fit ​​groove of the screw and nested in the open groove together with the inner concave snap-fit ​​groove, the end cover is nested on the outer circle of the screw and fixed to the outer wall of the open groove on the side of the base by screws, and a dust ring II is installed between the end cover and the outer circle of the screw. The adjusting gasket is used to adjust the gap between the inner concave snap-fit ​​groove on the screw and the open groove of the base, which is not only convenient for installation operation, but also avoids the shaking of the screw due to the excessive gap between the inner concave snap-fit ​​groove and the open groove, resulting in poor rotation stability of the screw, causing wear between the screw and the mounting hole of the wedge block, and failing to stably push the movement of the wedge block, thereby reducing the occurrence of adjustment accuracy; and after wear, the adjusting gasket can be replaced to ensure the stability of the screw rotation, further enhancing the service life of the present invention.

[0006] Further preferably, an end cap which is sleeved on the outer circle of the push rod is fixed on the end surface of the center hole of the base body, and a dustproof ring I is installed between the end cap and the outer circle of the push rod. The end cap and the dustproof ring play a role of sealing and dustproofing.

[0007] Further preferably, a gasket is installed between the upper end cover and the clamping bushing, and a dust ring II is installed between the upper end surface of the upper end cover and the guide column. The gasket further limits the movement of the clamping bushing in the guide hole of the base.

[0008] Further preferably, an air cavity I and an air cavity II are respectively left between the two guide columns and the base 1, and the air cavity I and the air cavity II are connected and penetrated through a groove provided on the upper end surface of the base, and are connected and penetrated with an exhaust hole provided on the side wall of the base, and an exhaust valve is installed on the exhaust hole. The air cavity I and the air cavity II are connected to the atmosphere to avoid gas resistance when the guide column moves up and down.

[0009] Further preferably, the digital displacement sensor is a digital dial indicator; an L-shaped mounting seat is fixed on the side of the support plate, and the digital dial indicator is fixed in the bottom hole of the mounting seat by a locking screw; the stopper and the limit block are fixed on the side wall of the base, respectively, and the top screw threaded in the threaded hole of the stopper 4 is connected to the bottom surface of the limit block, and the probe of the digital dial indicator is always in contact with the upper end surface of the limit block. In this way, the digital dial indicator directly displays the distance that the support plate is raised relative to the base.

[0010] When in use, place the workpiece on the support pin or on the upper end of the support pin, rotate the screw, drive the wedge block to move in the square inner cavity at the center of the base, and the inclined surface of the limit groove pushes the top rod to move upward, and the two guide pillars are also driven to move upward. The displacement sensor displays the movement displacement of the support plate at any time to monitor the support height. Compared with the prior art, the present invention can achieve precise adjustment of the workpiece support and can be visualized, and also has reliable locking and holding capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A top view of the present invention; Figure 3 for Figure 2 AA section view; Figure 4 for Figure 3 BB cross-sectional view; Figure 5 for Figure 2 CC section view; Figure 6 It is a left view of the present invention. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0013] like Figures 1 to 6 As shown, this embodiment includes a base 1, a base 3, a push rod 20, a rectangular spring 19, a wedge block 18, two guide columns 17, a clamping bushing 16, a support plate 8, a support pin 9, a digital displacement sensor 7 and a screw 12.

[0014] The base 3 is fixed on the base 1 by screws. The base 3 is provided with a central hole with a stepped circular hole at the upper end and a square inner cavity 26 at the lower end. The side of the wedge block 18 is provided with a mounting hole with a through hole at the inner end and a threaded hole on the wall. The upper end surface thereof is provided with a limiting groove 40 with an inclined bottom surface in the same direction as the mounting hole, which is placed in the square inner cavity 26 of the base. The outer circle of the push rod 20 is a reducing circle, and the lower end surface 38 thereof is an inclined surface with the same slope as the inclined surface of the limiting groove 40. The diameter of the lower end thereof is clearance-matched with the limiting groove 40 of the wedge block. The outer circle of the lower end thereof is provided with a spring shifting step 39 matching the stepped circular hole of the base 3. The push rod 20 is installed in the stepped circular hole of the base 3. The upper end thereof is fixed in the central hole of the support plate 8 by screws, and the lower end thereof is embedded in the limiting groove 40 of the wedge block 18 and is connected to the bottom surface of the limiting groove 40. The rectangular spring 19 is sleeved outside the push rod 20 and installed between the gear step 39 and the step of the circular hole of the base 3; the screw 12 is rotatably fixed in the open groove 42 opened on the side of the base 3, and its inner end is threadedly fixed in the mounting hole on the side of the wedge block 18.

[0015] Preferably, an end cap 23 is fixed on the end face of the center hole of the base 3 and is sleeved on the outer circumference of the push rod 20. A dustproof ring I 22 is installed between the end cap 23 and the outer circumference of the push rod 20. The end cap 23 and the dustproof ring I 22 play a role in sealing and dustproofing.

[0016] Preferably, the specific structure of the screw 12 being rotatably fixed in the open groove 42 opened on the side of the base 3 is: an inner concave snap-in groove 41 matching the open groove 42 of the base 3 is opened on the screw 12, the adjusting gasket 43 is sleeved in the inner concave snap-in groove 41 of the screw 12 and nested in the open groove 42 together with the inner concave snap-in groove 41, the end cover 37 is nested on the outer circle of the screw 12 and fixed to the outer wall of the open groove 42 on the side of the base 3 by screws, and a dust ring II 44 is installed between the end cover 37 and the outer circle of the screw 12. The adjusting gasket 43 is used to adjust the gap between the concave snap-fit ​​groove 41 on the screw 12 and the open groove 42 of the base 3, which not only facilitates the installation operation, but also avoids the screw 12 from shaking due to the excessive gap between the concave snap-fit ​​groove 41 and the open groove 42, resulting in poor rotational stability of the screw 12, causing wear between the screw 12 and the mounting hole of the wedge block 18, and failing to stably push the movement of the wedge block 18, thereby reducing the occurrence of adjustment accuracy; and after wear, the adjusting gasket 43 can be replaced to ensure the stability of the rotation of the screw 12, further enhancing the service life of the present invention.

[0017] Two guide holes are symmetrically opened on both sides of the base 3 relative to the center hole thereof, and two guide columns 17 are respectively installed in the guide holes. A mounting groove is opened on the bottom surface of the support plate 8, and an annular step 10 is arranged on the upper end of the guide column 17. The upper end of the guide column 17 is placed in the mounting groove and fixed to the bottom surface of the support plate 8 by screws, and the annular step 10 is close to the bottom surface of the support plate 8. The outer circle of the guide column 17 is respectively covered with a clamping bushing 16 whose two ends are sealed and fixed to the base 3 by a sealing ring 15. An oil chamber I33 and an oil chamber II25 are respectively arranged between the clamping bushing 16 and the guide hole wall, and an oil circuit I36, an oil circuit II35 and an oil circuit III27 are arranged in the base 3. The oil chamber I33 is connected to the oil circuit III27 through the oil circuit I36, the oil chamber II25 is connected to the oil circuit III27 through the oil circuit II35, and the oil circuit III27 is connected to the oil circuit IV28 arranged on the base 1 and connected to the external oil supply system. An upper end cover 11 which is sleeved on a guide column 17 and fixed on the base 3 is fixed in the guide hole at the upper end of the clamping bushing 16. 24 is a threaded plug installed on the oil circuit I 36 and the oil circuit II 35.

[0018] Preferably, a gasket 31 is installed between the upper end cover 11 and the clamping bushing 16, and a dust ring II 21 is installed between the upper end surface of the upper end cover 11 and the guide column 17. The gasket 31 further limits the movement of the clamping bushing 16 in the guide hole of the base 3.

[0019] Preferably, an air cavity I 30 and an air cavity II 32 are respectively left between the two guide pillars 17 and the base 1, and the air cavity I 30 and the air cavity II 32 are connected and penetrated through a groove 34 provided on the upper end surface of the base 1, and are connected and penetrated with an exhaust hole 29 provided on the side wall of the base 3, and an exhaust valve 2 is installed on the exhaust hole 29. The air cavity I 30 and the air cavity II 32 are connected to the atmosphere to avoid gas resistance when the guide pillar 17 moves up and down.

[0020] The digital display displacement sensor 7 is fixed on the side of the support plate 8. The support nail 9 is fixed in a threaded hole opened on a raised base on the upper end surface of the support plate 8 away from one end of the digital display displacement sensor 7.

[0021] Preferably, the digital displacement sensor 7 is a digital dial indicator. An L-shaped mounting seat 13 is fixed on the side of the support plate 8, and the digital dial indicator is fixed in the bottom hole of the mounting seat 13 by a locking screw 6. The stopper 4 is fixed to the side wall of the base 3 by screws; the limit block 5 is provided with a long hole 46, which can be fixed to the side wall of the base 3 in an adjustable manner by screws; the top screw 45 threadedly connected in the threaded hole of the stopper 4 is connected to the bottom surface of the limit block 5, and the probe of the digital dial indicator is always in contact with the upper end surface of the limit block 5. In this way, the digital dial indicator directly displays the distance that the support plate 8 is raised relative to the base 3.

[0022] When in use, the workpiece is placed on the support pin 9 or on the upper end of the support pin 9, and the screw 12 is rotated to drive the wedge block 18 to move in the square inner cavity 26 at the center of the base 3. The inclined surface of the limit groove 40 pushes the top rod 20 to move upward, and the two guide pillars 17 are also driven to move upward. The displacement sensor 7 displays the movement displacement of the support plate 8 at any time to monitor the support height. Compared with the prior art, the present invention can realize the precise adjustment of the workpiece support and can be visualized, and also has a reliable locking and holding ability.

[0023] Of course, the present invention has many other embodiments. Without violating the spirit and essence of the present invention, technicians familiar with the field can make corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should be regarded as improvements of equivalent technologies and belong to the protection scope of the claims of the present invention.

Claims

1. A self-locking height-adjustable support device, characterized in that: It includes a base, a matrix, a push rod, a rectangular spring, a wedge block, two guide columns, a clamping bushing, a support plate, a support pin, a digital displacement sensor and a screw; the matrix is ​​fixed on the base; The center of the base is provided with a center hole with a stepped circular hole at the upper end and a square inner cavity at the lower end; a mounting hole with a through hole at the inner end and a threaded hole on the wall is opened on the side of the wedge-shaped block, and a limiting groove with an inclined bottom surface in the same direction as the mounting hole is opened on its upper end surface, which is placed in the square inner cavity of the base; the outer circle of the push rod is a reducing circle, and the lower end surface is an inclined surface with the same slope as the inclined surface of the limiting groove, and the diameter of the lower end is matched with the clearance of the limiting groove of the wedge-shaped block, and the outer circle of the lower end is provided with a shift step of a spring matching the stepped circular hole of the base, which is installed in the stepped circular hole of the base, the upper end is fixed in the center hole of the support plate, and the lower end is embedded in the limiting groove of the wedge block and connected to the bottom surface of the limiting groove; the rectangular spring is sleeved outside the push rod and installed between the shift step and the step of the stepped circular hole of the base; the screw rod can be rotatably fixed in the open groove opened on the side of the base, and its inner end is threadedly fixed in the mounting hole on the side of the wedge block; Two guide holes are symmetrically opened on both sides of the base relative to the center hole thereof, and two guide columns are respectively installed in the guide holes, and their upper ends are fixed on the bottom surface of the support plate, and the outer circles thereof are respectively covered with clamping bushings whose two ends are sealed and fixed to the base; oil chamber I and oil chamber II are respectively arranged between the clamping bushing and the guide hole wall, and oil circuits I, II and III are arranged in the base; oil chamber I is connected to oil circuit III through oil circuit I, oil chamber II is connected to oil circuit III through oil circuit II, and oil circuit III is connected to oil circuit IV arranged on the base and connected to the external oil supply system; an upper end cover which is covered on the guide column and fixed on the base is fixed in the guide hole at the upper end of the clamping bushing; The digital display displacement sensor is fixed on the side of the support plate; the support nail is fixed in a threaded hole opened on a raised base on the upper surface of the support plate that protrudes away from one end of the digital display displacement sensor.

2. The self-locking height-adjustable support device according to claim 1, characterized in that: The specific structure of the screw rod rotatably fixed in the open groove opened on the side of the base is: the screw rod is provided with an inner concave snap-in groove matching the open groove of the base body, the adjusting gasket is sleeved in the inner concave snap-in groove of the screw rod and nested in the open groove together with the inner concave snap-in groove, the end cover is nested on the outer circle of the screw rod and fixed to the outer wall of the open groove on the side of the base body by screws, and a dust ring II is installed between the end cover and the outer circle of the screw rod.

3. The self-locking height-adjustable support device according to claim 1 or 2, characterized in that: The digital displacement sensor is a digital dial indicator; an L-shaped mounting seat is fixed on the side of the support plate, and the digital dial indicator is fixed in the bottom hole of the mounting seat by a locking screw; the stopper and the limit block are respectively fixed on the side wall of the base, and the top screw threaded in the threaded hole of the stopper is connected to the bottom surface of the limit block, and the probe of the digital dial indicator is always in contact with the upper end surface of the limit block.

4. The self-locking height-adjustable support device according to claim 3, characterized in that: An air cavity I and an air cavity II are respectively left between the two guide columns and the base 1. The air cavity I and the air cavity II are connected through a groove provided on the upper end surface of the base, and are connected through an exhaust hole provided on the side wall of the base. An exhaust valve is installed on the exhaust hole.

5. The self-locking height-adjustable support device according to claim 4, characterized in that: An end cover which is sleeved on the outer circle of the ejector rod is fixed on the end surface of the center hole of the base body, and a dustproof ring I is installed between the end cover and the outer circle of the ejector rod.

6. The self-locking height-adjustable support device according to claim 5, characterized in that: A gasket is installed between the upper end cover and the clamping bushing, and a dust ring II is installed between the upper end surface of the upper end cover and the guide column.

7. The self-locking height-adjustable support device according to claim 1 or 2, characterized in that: An air cavity I and an air cavity II are respectively left between the two guide columns and the base 1. The air cavity I and the air cavity II are connected through a groove provided on the upper end surface of the base, and are connected through an exhaust hole provided on the side wall of the base. An exhaust valve is installed on the exhaust hole.

8. The self-locking height-adjustable support device according to claim 7, characterized in that: An end cover which is sleeved on the outer circle of the ejector rod is fixed on the end surface of the center hole of the base body, and a dustproof ring I is installed between the end cover and the outer circle of the ejector rod.

9. The self-locking height-adjustable support device according to claim 8, characterized in that: A gasket is installed between the upper end cover and the clamping bushing, and a dust ring II is installed between the upper end surface of the upper end cover and the guide column.

10. The self-locking height-adjustable support device according to claim 1 or 2, characterized in that: An end cover which is inserted into the outer circle of the push rod is fixed on the end face of the center hole of the base, and a dust ring I is installed between the end cover and the outer circle of the push rod; a gasket is installed between the upper end cover and the clamping bushing, and a dust ring II is installed between the upper end face of the upper end cover and the guide column.

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