A reliability test device for electro-hydraulic servo feed system

Abstract

The present invention discloses a reliability test device for an electro-hydraulic servo feed system, comprising a workbench with a slide rail, a movable platform slidingly arranged on the slide rail, an electromagnetic component capable of changing the magnitude of the force applied to the workbench and a mounting component convenient for threaded connection between the workbench and the screw of the electro-hydraulic servo feed system. The reliability test device for an electro-hydraulic servo feed system of the present invention has an electromagnetic component arranged at the bottom of the movable platform, which can apply forces of different magnitudes to the movable platform as needed, and is convenient and simple to operate. The first magnetic isolation box and the second magnetic isolation box can isolate the magnetic field to prevent the electromagnet from generating magnetic adsorption on other objects. A connecting rope is arranged between the first magnetic isolation box and the magnetic isolation plate to prevent the lower end of the first magnetic isolation box from being separated from the inner cavity of the second magnetic isolation box. A mounting part is arranged to facilitate the threaded disassembly and assembly of the movable platform and the screw, and a universal ball bearing is arranged to reduce friction between the components and avoid friction loss.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic control system testing, in particular to a reliability testing device for an electro-hydraulic servo feed system. Background Art

[0002] The electro-hydraulic servo feed system is a hydraulic control system that combines the strengths of both electrical and hydraulic systems. It boasts high control accuracy, fast response, high output power, flexible signal processing, and easy feedback of various parameters. It has been widely used in key fields such as aerospace, metallurgy, and manufacturing. Electro-hydraulic servo systems are also widely used in the feed systems of CNC machine tools. The functional execution portion of a CNC machine tool is the servo feed system, and the machining accuracy of a CNC machine tool primarily depends on it. This is why a reliability test device for the electro-hydraulic servo feed system was developed.

[0003] At present, a mobile platform is used in the reliability test of the electro-hydraulic servo feed system. The mobile platform is slidably set on the slide rail of the experimental device. During the experiment, industrial weights of different weights need to be placed on the mobile platform for multiple experiments. Since manual placement of weights is troublesome and labor-intensive, and the mobile platform is connected to the screw rod of the electro-hydraulic servo feed system through a threaded tube and cannot be disassembled, it is inconvenient to maintain. Therefore, we propose a reliability test device for the electro-hydraulic servo feed system to solve this problem. Summary of the Invention

[0004] The main purpose of the present invention is to provide a reliability test device for an electro-hydraulic servo feed system, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A reliability test device for an electro-hydraulic servo feed system comprises a workbench with a slide rail, a movable platform is slidably arranged on the slide rail, and an electromagnetic component that can change the magnitude of the force applied to the workbench and an installation component that facilitates the threaded connection between the electromagnetic component and the lead screw of the electro-hydraulic servo feed system are installed at the bottom of the workbench.

[0007] Preferably, the electromagnetic assembly includes a first magnetic isolation box whose upper end is fixedly connected to the lower end of the movable platform and a second magnetic isolation box slidably connected to the workbench through a T-shaped slider. A magnetic isolation plate is fixed in the second magnetic isolation box, and an electromagnet and a transformer are respectively installed on the upper and lower ends of the magnetic isolation plate. The transformer and the electromagnet are both electrically connected to the control on the outer wall of the second magnetic isolation box. An iron block is fixed on the top of the inner cavity of the first magnetic isolation box, and the lower end of the first magnetic isolation box slides in the inner cavity of the second magnetic isolation box.

[0008] Preferably, the upper and lower ends of the T-shaped slider are symmetrically mounted with first universal balls, and the T-shaped cavity of the workbench is provided with an arc-shaped limiting groove matched with the outer end surface of the first universal ball.

[0009] Preferably, a plurality of groups of connecting ropes are symmetrically arranged between the lower end of the first magnetic isolation box and the upper end of the magnetic isolation plate to prevent the lower end of the first magnetic isolation box and the magnetic isolation plate from being separated.

[0010] Preferably, the outer surface of the connecting rope is provided with a ZS-711 inorganic anti-corrosion coating and the thickness of the ZS-711 inorganic anti-corrosion coating is set to between 120-150 μm.

[0011] Preferably, the mounting assembly includes a screw that rotates in a groove at the lower end of the movable platform and a worm that is rotatably arranged at the lower end of the movable platform. Four groups of ball nuts are symmetrically arranged in pairs on the screw. The four groups of ball nuts are fixedly embedded in the inner cavities of the four groups of slides, and the upper ends of the four groups of slides are all located in the grooves. The four groups of slides are respectively fixedly connected to the corresponding semi-threaded tubes, and a worm gear meshing with the worm is fixed at one end of the screw.

[0012] Preferably, a second universal ball is provided on the upper end and both side ends of the slide bar, and an arc-shaped limiting groove adapted to the outer end of the second universal ball is provided on the inner cavity wall of the groove.

[0013] Preferably, two groups of U-shaped plates are symmetrically provided at the lower end of the movable platform, and the inner cavity and the lower end of the U-shaped plate are provided with a third universal ball, and the slide rail is provided with an arc-shaped limiting groove adapted to the outer end of the third universal ball.

[0014] Preferably, the outer surface of the iron block is provided with a rust-proof coating.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. An electromagnetic component is provided at the bottom of the movable platform, which can apply different forces to the movable platform as needed. The operation is convenient and simple. The first magnetic isolation box and the second magnetic isolation box can isolate the magnetic field to prevent the electromagnet from generating magnetic adsorption on other objects.

[0017] 2. A connecting rope is provided between the first magnetic isolation box and the magnetic isolation plate to prevent the lower end of the first magnetic isolation box from escaping from the inner cavity of the second magnetic isolation box.

[0018] 3. A mounting piece is provided to control the two sets of relatively arranged half-threaded tubes to move relative to each other or in reverse under the drive of the ball nut, thereby completing the threaded connection between the half-threaded tubes and the screw rod or releasing the threaded connection between the two, making it convenient for the threaded disassembly and assembly of the movable platform and the screw rod.

[0019] 4. The first universal ball, the second universal ball and the third universal ball are provided to reduce the friction between the components and avoid friction loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a reliability test device for an electro-hydraulic servo feed system according to the present invention;

[0021] Figure 2 This is a bottom-up structural diagram of a movable platform of a reliability test device for an electro-hydraulic servo feed system according to the present invention;

[0022] Figure 3 This is a structural diagram of the installation components of a reliability test device for an electro-hydraulic servo feed system according to the present invention;

[0023] Figure 4 This is a diagram of the semi-threaded pipe structure of a reliability test device for an electro-hydraulic servo feed system according to the present invention;

[0024] Figure 5 This is a structural diagram of the electromagnetic components of a reliability test device for an electro-hydraulic servo feed system according to the present invention;

[0025] Figure 6 This is a cross-sectional structural diagram of the first magnetic isolation box and the second magnetic isolation box of a reliability test device for an electro-hydraulic servo feed system of the present invention.

[0026] In the figure: 1. Workbench; 2. Slide rail; 3. Moving table; 4. U-shaped plate; 5. Third universal ball transfer; 6. Mounting assembly; 61. Screw; 62. Semi-threaded tube; 63. Slide bar; 64. Ball nut; 65. Worm gear; 66. Worm; 7. Electromagnetic assembly; 71. First magnetic isolation box; 72. Second magnetic isolation box; 73. T-shaped slider; 74. Electromagnet; 75. Transformer; 76. Magnetic isolation plate; 77. Iron block; 8. First universal ball transfer; 9. Second universal ball transfer; 10. Connecting rope. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] like Figure 1-6 As shown, a reliability test device for an electro-hydraulic servo feed system includes a workbench 1 with a slide rail 2, a movable table 3 is slidably arranged on the slide rail 2, and an electromagnetic component 7 that can change the force it is subjected to and a mounting component 6 that facilitates the threaded connection between the electromagnetic component 7 and the lead screw of the electro-hydraulic servo feed system are installed at the bottom of the workbench 1.

[0029] The electromagnetic assembly 7 includes a first magnetic isolation box 71 fixedly connected at its upper end to the lower end of the movable table 3 and a second magnetic isolation box 72 slidably connected to the workbench 1 through a T-shaped slider 73. A magnetic isolation plate 76 is fixed in the second magnetic isolation box 72, and an electromagnet 74 and a transformer 75 are respectively installed at the upper end and the lower end of the magnetic isolation plate 76. The transformer 75 and the electromagnet 74 are both electrically connected to the control on the outer wall of the second magnetic isolation box 72. An iron block 77 is fixed at the top of the inner cavity of the first magnetic isolation box 71. The lower end of the first magnetic isolation box 71 slides in the second magnetic isolation box. The inner cavity of the box 72 can change the voltage across the input electromagnet 76 through the transformer 75, thereby changing the magnetic strength of the electromagnet 76, and changing the magnitude of the force acting on the movable platform 3 through the magnetic force between the electromagnet 76 and the iron block 77, thereby replacing the placement of weights on the movable platform 3. The electromagnetic component 7 can apply different magnitudes of force to the movable platform 3 as needed, and the operation is convenient and simple. The first magnetic isolation box 71 and the second magnetic isolation box 72 can isolate the magnetic field to prevent the electromagnet 76 from generating magnetic adsorption on other objects.

[0030] The upper and lower ends of the T-shaped slider 73 are symmetrically installed with the first universal ball 8. The T-shaped cavity of the workbench 1 is provided with an arc-shaped limit groove that is compatible with the outer end surface of the first universal ball 8, which can reduce the friction between the T-shaped slider 73 and the workbench 1 and facilitate the movement of the second magnetic isolation box 72.

[0031] Several groups of connecting ropes 10 are symmetrically arranged between the lower end of the first magnetic isolation box 71 and the upper end of the magnetic isolation plate 76 to prevent the lower end of the first magnetic isolation box 71 and the magnetic isolation plate 76 from separating. When the T-shaped slider 73 at the lower end of the second magnetic isolation box 72 is slid out of the groove on the workbench 1 so that it is separated from the workbench 1, the connecting ropes 10 can prevent the lower end of the first magnetic isolation box 71 from separating from the inner cavity of the second magnetic isolation box 72.

[0032] The outer surface of the connecting rope 10 is provided with a ZS-711 inorganic anti-corrosion coating and the thickness of the ZS-711 inorganic anti-corrosion coating is set between 120-150 μm, which can prevent the connecting rope 10 from being damaged by corrosion. The ZS-711 inorganic anti-corrosion coating has good acid and alkali resistance.

[0033] The mounting assembly 6 includes a screw 61 that rotates in the groove at the lower end of the movable platform 3 and a worm 66 that is rotatably arranged at the lower end of the movable platform 3. Four groups of ball nuts 64 are symmetrically arranged on the screw 61. The four groups of ball nuts 64 are fixedly embedded in the inner cavity of the four groups of slide bars 63 respectively, and the upper ends of the four groups of slide bars 63 are all located in the grooves. The four groups of slide bars 63 are respectively fixedly connected to the corresponding half-threaded tubes 62. One end of the screw 61 is fixed with a worm gear 65 that is meshed with the worm 66. By rotating the worm 66, the screw 61 can be rotated through the worm gear 65, and the two relatively arranged groups of half-threaded tubes 62 can be controlled to move relative to or back to each other under the drive of the ball nuts 64, thereby completing the threaded connection between the half-threaded tubes 62 and the screw rod or releasing the threaded connection between the two, which is convenient for the threaded disassembly and assembly of the movable platform 3 and the screw rod.

[0034] Second universal balls 9 are provided on the upper end and both side ends of the slide bar 63 , and arc-shaped limiting grooves adapted to the outer ends of the second universal balls 9 are provided on the inner wall of the groove, which can reduce the friction between the slide bar 63 and the movable platform 3 .

[0035] Two groups of U-shaped plates 4 are symmetrically arranged at the lower end of the movable platform 3, and the inner cavity and the lower end of the U-shaped plate 4 are both provided with a third universal ball 5. The slide rail 2 is provided with an arc-shaped limit groove adapted to the outer end of the third universal ball 5, so that the movable platform 3 and the slide rail 2 form rolling friction and facilitate the plug-in installation of the two groups.

[0036] The outer surface of the iron block 77 is provided with an anti-rust coating to prevent the iron block 77 from oxidizing and rusting, thereby increasing its service life.

[0037] It should be noted that the present invention is a reliability test device for an electro-hydraulic servo feed system. An electromagnetic assembly 7 is provided at the bottom of the movable platform 3. The voltage at both ends of the input electromagnet 76 can be changed through a transformer 75, thereby changing the magnetic strength of the electromagnet 76. The magnitude of the force acting on the movable platform 3 is changed by the magnetic force between the electromagnet 76 and the iron block 77, thereby replacing the placement of weights on the movable platform 3. The electromagnetic assembly 7 can apply forces of different magnitudes to the movable platform 3 as needed, and the operation is convenient and simple. The first magnetic isolation box 71 and the second magnetic isolation box 72 can isolate the magnetic field to prevent the electromagnet 76 from generating magnetic fields on other objects. It generates magnetic adsorption and is provided with a mounting assembly 6. By rotating the worm 66, the screw 61 is rotated through the worm wheel 65, and the two relatively arranged groups of semi-threaded tubes 62 can be controlled to make relative or reverse movements under the drive of the ball nut 64, thereby completing the threaded connection between the semi-threaded tubes 62 and the screw or releasing the threaded connection between the two, which is convenient for the threaded disassembly and assembly of the movable platform 3 and the screw. A connecting rope 10 is provided to prevent the lower end of the first magnetic isolation box 71 from detaching from the inner cavity of the second magnetic isolation box 72. A first universal ball 8, a second universal ball 9 and a third universal ball 5 are provided to reduce the friction between the components and avoid friction loss.

Claims

1. A reliability test device for an electro-hydraulic servo feed system, comprising a workbench (1) with a slide rail (2), a movable table (3) being slidably arranged on the slide rail (2), and characterized in that: The bottom of the workbench (1) is equipped with an electromagnetic component (7) capable of changing the magnitude of the force applied to the movable platform and a mounting component (6) for facilitating threaded connection between the movable platform and the lead screw of the electro-hydraulic servo feed system; The mounting assembly (6) includes a screw (61) that rotates in a groove at the lower end of the moving platform (3) and a worm (66) that is rotatably arranged at the lower end of the moving platform (3). Four sets of ball nuts (64) are symmetrically arranged on the screw (61). The four sets of ball nuts (64) are respectively fixedly embedded in the inner cavities of the four sets of slide bars (63), and the upper ends of the four sets of slide bars (63) are all located in the groove. The four sets of slide bars (63) are respectively fixedly connected to the corresponding semi-threaded tubes (62). One end of the screw (61) is fixed with a worm wheel (65) that is meshed with the worm (66).

2. The electro-hydraulic servo feed system reliability test device according to claim 1, characterized in that: The electromagnetic assembly (7) comprises a first magnetic isolation box (71) whose upper end is fixedly connected to the lower end of the movable platform (3) and a second magnetic isolation box (72) which is slidably connected to the workbench (1) via a T-shaped slider (73); a magnetic isolation plate (76) is fixed in the second magnetic isolation box (72), and an electromagnet (74) and a transformer (75) are respectively installed at the upper end and the lower end of the magnetic isolation plate (76); the transformer (75) and the electromagnet (74) are both electrically connected to the control on the outer wall of the second magnetic isolation box (72); an iron block (77) is fixed to the top of the inner cavity of the first magnetic isolation box (71), and the lower end of the first magnetic isolation box (71) slides in the inner cavity of the second magnetic isolation box (72).

3. The electro-hydraulic servo feed system reliability test device according to claim 2, characterized in that: The upper and lower ends of the T-shaped slider (73) are symmetrically mounted with first universal balls (8), and the T-shaped cavity of the workbench (1) is provided with an arc-shaped limiting groove adapted to the outer end surface of the first universal ball (8).

4. The electro-hydraulic servo feed system reliability test device according to claim 2, characterized in that: A plurality of groups of connecting ropes (10) are symmetrically arranged between the lower end of the first magnetic isolation box (71) and the upper end of the magnetic isolation plate (76) to prevent the lower end of the first magnetic isolation box (71) and the magnetic isolation plate (76) from separating.

5. The electro-hydraulic servo feed system reliability test device according to claim 4, characterized in that: The outer surface of the connecting rope (10) is provided with a ZS-711 inorganic anti-corrosion coating, and the thickness of the ZS-711 inorganic anti-corrosion coating is set to be between 120-150 μm.

6. The electro-hydraulic servo feed system reliability test device according to claim 1, characterized in that: A second universal ball (9) is provided on the upper end and both side ends of the slide bar (63), and an arc-shaped limiting groove adapted to the outer end of the second universal ball (9) is provided on the inner wall of the groove.

7. The electro-hydraulic servo feed system reliability test device according to any one of claims 1 to 6, characterized in that: The lower end of the movable platform (3) is symmetrically provided with two groups of U-shaped plates (4), and the inner cavity and the lower end of the U-shaped plates (4) are both provided with a third universal ball (5), and the slide rail (2) is provided with an arc-shaped limiting groove adapted to the outer end of the third universal ball (5).

8. The electro-hydraulic servo feed system reliability test device according to any one of claims 2 to 6, characterized in that: The outer surface of the iron block (77) is provided with a rust-proof coating.

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