Straight-stroke electric actuating mechanism testing device
By wrapping a spiral branch pipe around the outside of the sealing cylinder and using a center column, the problem of insufficient testing accuracy of linear electric actuators in the existing technology is solved, accurate detection of different strokes is achieved, and the applicability and accuracy of the test device are improved.
Patent Information
- Application Number
- CN202422633219.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the prior art, it is difficult to ensure the test precision and accuracy in the push-pull force test of a linear electric actuator, especially for actuators with different strokes.
A testing device consisting of a sealing cylinder, a branch pipe and a sealing plug was designed. A spiral branch pipe was wrapped around the outside of the sealing cylinder, and the middle of the sealing plug passed through the center column. The displacement of the movable rod of the actuator was detected by the liquid level changes in the branch pipe and the sealing plug. Combined with the scale and limit structure, accurate testing of different strokes was achieved.
It improves the test accuracy of short-stroke and long-stroke actuators, ensures the accuracy and applicability of test results, and is suitable for electric actuators with various strokes.
Smart Images
Figure CN223413402U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of testing, in particular to a testing device for a linear electric actuator. Background Art
[0002] An electric actuator is a device that uses liquid, gas, electricity or other energy and converts it into a driving force through a motor, cylinder or other device. A linear actuator refers to a driving device that provides linear motion.
[0003] In the prior art, the push-pull force test of a linear electric actuator mostly adopts the traditional hanging weight detection method using a lever and a weight, which is simple to operate and easy to test at any time.
[0004] However, at present, for actuators with different strokes, traditional testing devices are difficult to ensure the test accuracy and the accuracy of the test results. Therefore, the present utility model proposes a linear electric actuator testing device for solving the above problems. Utility Model Content
[0005] The purpose of the utility model is to provide a linear electric actuator testing device to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a linear electric actuator testing device, comprising:
[0007] A sealing cylinder, wherein the sealing cylinder is configured as a hollow structure with an opening at the upper end, and a scale is vertically provided on the surface of the sealing cylinder;
[0008] a branch pipe, the branch pipe being spirally wound around the outside of the sealing cylinder, the lower end of the branch pipe being communicated with the inner cavity at the bottom of the sealing cylinder, and the inner diameter of the branch pipe being smaller than the inner diameter of the sealing cylinder;
[0009] A sealing plug is movably mounted on the upper end of the inner cavity of the sealing cylinder and is sealed against the inner wall of the sealing cylinder. A central column is movably provided through the middle of the sealing plug, and the lower end of the central column extends to the bottom of the inner cavity of the sealing cylinder. A seal is maintained between the central column and the sealing plug, and a movable rod of an actuator is provided above the central column.
[0010] Preferably, two branch pipes are provided, and the two branch pipes are distributed in an annular array outside the sealing cylinder.
[0011] Preferably, a collecting pipe is sleeved on the outer upper end of the sealing cylinder, the upper ends of the two branch pipes are connected to the inner cavity of the collecting pipe, and a pressure relief pipe is fixed on the surface of the collecting pipe, which opens upward and is connected to the outside.
[0012] Preferably, a limiting rod is fixedly provided at the bottom of the sealing cylinder, and the limiting rod is movably inserted into the inner cavity at the lower end of the central column. An anti-slip ring is fixedly sleeved on the outer side of the lower half of the central column.
[0013] Preferably, two symmetrically distributed connecting frames are fixed to the upper surface of the sealing plug, and the connecting frames are arranged in an inverted "L" shape. A mounting frame is fixed to the upper end surface of the central column, and the mounting frame and the connecting frame are staggered with each other.
[0014] Preferably, a plurality of fixing pins distributed in a circular array are fixed to the inner wall of the upper end of the sealing cylinder, and a limit frame corresponding to the plurality of fixing pins is provided at the edge of the upper surface of the sealing plug. A countersunk groove is provided on the surface of the limit frame and is fixedly connected to the sealing plug by bolts. The limit frame rotates with the sealing plug and is buckled on the outside of the fixing pin.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] The utility model is achieved by arranging a spiral branch pipe on the outer side of the sealing cylinder, the lower end of the branch pipe is connected to the bottom of the sealing cylinder, a scale is vertically opened on the surface of the sealing cylinder, a sealing plug is movably arranged in the inner cavity of the upper end of the sealing cylinder, and a center column is movably arranged through the middle of the sealing plug. When the stroke of the actuator movable rod is small, the actuator movable rod is connected to the sealing plug, and the sealing plug pushes the liquid in the inner cavity of the sealing cylinder and squeezes it into the inside of the branch pipe. Since the inner diameter of the branch pipe is much smaller than the inner diameter of the sealing cylinder, the actuator movable rod only needs to move slightly to significantly change the liquid level height in the inner cavity of the branch pipe, thereby improving the test accuracy. When the stroke of the actuator movable rod is large, the actuator movable rod is connected to the center column, the center column moves up and draws the liquid in the inner cavity of the branch pipe back to the inner cavity of the sealing cylinder. Therefore, the device can test the actuator movable rods with long and short strokes respectively, and when testing the short-stroke actuator movable rod, the test accuracy is high and the test results are more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;
[0018] Figure 2 This is a half-section schematic diagram of the sealing cylinder structure of the utility model;
[0019] Figure 3 This is a partial explosion diagram of the sealing plug and sealing cylinder structure of the utility model.
[0020] In the figure: 1. Sealing cylinder; 11. Scale; 12. Fixing pin; 2. Branch pipe; 3. Collecting pipe; 31. Pressure relief pipe; 4. Sealing plug; 41. Connecting frame; 42. Limiting frame; 43. Countersunk groove; 5. Center column; 51. Anti-slip ring; 52. Mounting frame; 6. Limiting rod; 7. Actuator movable rod. DETAILED DESCRIPTION
[0021] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0022] See also Figures 1 to 3 , the utility model provides a technical solution:
[0023] Embodiment 1, a linear electric actuator testing device, includes: a sealing cylinder 1, a branch pipe 2 and a sealing plug 4.
[0024] Specifically, the sealing cylinder 1 is configured as a hollow structure with an opening at the upper end. The inner cavity of the sealing cylinder 1 is filled with liquid, which is hydraulic oil that is incompressible itself. A scale 11 is vertically opened on the surface of the sealing cylinder 1. The scales 11 are arranged in multiple groups and distributed in a circular array around the surface of the sealing cylinder 1 to facilitate staff to observe the liquid level height.
[0025] Secondly, the branch pipe 2 is spirally wound around the outside of the sealing cylinder 1, and the lower end of the branch pipe 2 is connected to the inner cavity at the bottom of the sealing cylinder 1. The inner diameter of the branch pipe 2 is smaller than the inner diameter of the sealing cylinder 1. Figure 1 As shown, due to the communicating vessel principle, the liquid level height of the inner cavity of the branch pipe 2 is consistent with the liquid level height of the inner cavity of the sealing cylinder 1. When the liquid level in the inner cavity of the sealing cylinder 1 changes, the liquid level height of the inner cavity of the branch pipe 2 can change in the opposite direction. Moreover, since the inner diameter of the branch pipe 2 is much smaller than the inner diameter of the sealing cylinder 1, the liquid level height of the inner cavity of the branch pipe 2 can change significantly even if the liquid level in the inner cavity of the sealing cylinder 1 changes slightly. In addition, setting the branch pipe 2 in a spiral shape can significantly extend the length of the branch pipe 2 itself, thereby increasing the amount of liquid that can be accommodated in the branch pipe 2.
[0026] Furthermore, the sealing plug 4 is movably installed at the upper end of the inner cavity of the sealing cylinder 1 and is sealed with the inner wall of the sealing cylinder 1. Therefore, when the sealing plug 4 moves up and down in the inner cavity of the sealing cylinder 1, the liquid level in the inner cavity of the sealing cylinder 1 can be changed, and the liquid level in the inner cavity of the branch pipe 2 can be significantly changed. Therefore, when the upper actuator movable rod 7 is connected to the sealing plug 4, the present device can accurately detect the small displacement of the actuator movable rod 7 through the liquid level change of the branch pipe 2. In addition, a central column 5 is movably provided in the middle of the sealing plug 4, and the lower end of the central column 5 extends to the bottom of the inner cavity of the sealing cylinder 1. The central column 5 and the sealing plug 4 are kept sealed. Since the diameter of the central column 5 is smaller than that of the sealing cylinder 1, when the central column 5 moves up and down along its own length, the liquid level in the inner cavity of the sealing cylinder 1 can change accordingly, but the degree of change is small. Therefore, when the upper actuator movable rod 7 is connected to the central column 5, the present device can detect electric actuators with larger strokes.
[0027] In order to further improve the accuracy of the detection results, two branch pipes 2 are provided in the present application, and the two branch pipes 2 are distributed in a circular array on the outside of the sealing tube 1. By simultaneously observing the liquid level heights in the inner cavities of the two branch pipes 2, the accuracy of the detection results can be further improved and the impact of operational errors can be reduced.
[0028] In order to prevent the air pressure from affecting the liquid level change, the present application also has a collection pipe 3 sleeved on the upper end of the outer side of the sealing cylinder 1, the upper ends of the two branch pipes 2 are connected to the inner cavity of the collection pipe 3, and a pressure relief pipe 31 is fixed on the surface of the collection pipe 3. The pressure relief pipe 31 opens upward and is connected to the outside world. Figure 1 As shown, the pressure relief pipe 31 connects the inner cavity of the collecting pipe 3 with the outside to prevent the pressure difference from affecting the change of the liquid level inside the branch pipe 2.
[0029] In order to limit the upward movement of the center column 5, the present application also has a limit rod 6 fixedly provided at the bottom of the sealing cylinder 1, and the limit rod 6 is movably inserted into the lower end cavity of the center column 5. Figure 2 As shown, the limiting rod 6 is used to guide the lower part of the center column 5, and cooperates with the sealing plug 4 to guide the upper part of the center column 5, so as to prevent the center column 5 from tilting. The outer fixed sleeve of the lower half of the center column 5 is provided with an anti-slip ring 51, and the anti-slip ring 51 is set to limit the upward sliding of the center column 5.
[0030] In order to improve the scope of application of the present device, the present application also has two symmetrically distributed connecting frames 41 fixed on the upper surface of the sealing plug 4, and the connecting frames 41 are arranged in an inverted "L" shape, and the upper end surface of the central column 5 is fixed with a mounting frame 52, and the mounting frame 52 and the connecting frame 41 are staggered with each other, such as Figure 1 and Figure 2As shown, the overall height of the connecting frame 41 is higher than the overall height of the mounting frame 52. When the actuator movable rod 7 is a short-stroke actuator, the lower end of the actuator movable rod 7 is fixed to the connecting frame 41. When the actuator movable rod 7 is extended a small distance, the sealing plug 4 can press the liquid into the inner cavity of the branch pipe 2 and cause the liquid in the inner cavity of the branch pipe 2 to change significantly. By observing the change of the liquid level in the inner cavity of the branch pipe 2 through the scale 11, combined with the ratio of the cross-sectional area of the inner cavity of the branch pipe 2 to the cross-sectional area of the inner cavity of the sealing cylinder 1, the displacement of the sealing plug 4 can be accurately calculated, thereby ensuring that the device can The short-stroke actuator rod 7 is accurately measured. When the actuator rod 7 is a long-stroke actuator, the lower end of the actuator rod 7 is fixed to the mounting bracket 52, and then the actuator rod 7 is retracted to drive the center column 5 to move upward. At this time, the liquid in the inner cavity of the branch pipe 2 can slowly drop. By measuring the liquid level difference in the inner cavity of the branch pipe 2 and combining the ratio of the cross-sectional area of the inner cavity of the branch pipe 2 to the cross-sectional area of the center column 5, the displacement of the center column 5 can be calculated. Therefore, this device can detect the actuator rod 7 of different strokes and has a wider range of applications.
[0031] In order to fix the sealing plug 4, the present application also has a plurality of fixing pins 12 distributed in a circular array fixed on the inner wall of the upper end of the sealing cylinder 1, and a limit frame 42 corresponding to the plurality of fixing pins 12 is provided at the edge of the upper surface of the sealing plug 4. A countersunk groove 43 is provided on the surface of the limit frame 42 and is fixedly connected to the sealing plug 4 by bolts. The limit frame 42 rotates with the sealing plug 4 and is buckled on the outside of the fixing pin 12. After the limit frame 42 is fixed to the sealing plug 4, the limit frame 42 and the fixing pin 12 can be buckled or separated from each other by rotating the sealing plug 4. When the actuator movable rod 7 is connected to the sealing plug 4, the sealing plug 4 is ensured to move downward by rotating the sealing plug 4. When the actuator movable rod 7 is connected to the center column 5, the sealing plug 4 is fixed by rotating the sealing plug 4, thereby preventing the sealing plug 4 from moving with the center column 5 when it moves upward.
[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A linear electric actuator testing device, characterized by: include: A sealing cylinder (1), wherein the sealing cylinder (1) is configured as a hollow structure with an opening at the upper end, and a scale (11) is vertically provided on the surface of the sealing cylinder (1); A branch pipe (2), the branch pipe (2) is spirally wound around the outside of the sealing cylinder (1), the lower end of the branch pipe (2) is connected to the inner cavity of the bottom of the sealing cylinder (1), and the inner diameter of the branch pipe (2) is smaller than the inner diameter of the sealing cylinder (1); A sealing plug (4) is movably mounted on the upper end of the inner cavity of the sealing cylinder (1) and is sealed against the inner wall of the sealing cylinder (1); a central column (5) is movably provided through the middle of the sealing plug (4), and the lower end of the central column (5) extends to the bottom of the inner cavity of the sealing cylinder (1); a seal is maintained between the central column (5) and the sealing plug (4); and an actuator movable rod (7) is provided above the central column (5).
2. A linear electric actuator testing device according to claim 1, characterized in that: Two branch pipes (2) are provided, and the two branch pipes (2) are distributed in an annular array outside the sealing cylinder (1).
3. A linear electric actuator testing device according to claim 2, characterized in that: A collecting pipe (3) is sleeved on the outer upper end of the sealing cylinder (1), and the upper ends of the two branch pipes (2) are both connected to the inner cavity of the collecting pipe (3). A pressure relief pipe (31) is fixed on the surface of the collecting pipe (3), and the pressure relief pipe (31) opens upward and is connected to the outside.
4. A linear electric actuator testing device according to claim 1, characterized in that: A limit rod (6) is fixedly provided at the bottom of the sealing cylinder (1), and the limit rod (6) is movably inserted into the inner cavity of the lower end of the central column (5). An anti-slip ring (51) is fixedly sleeved on the outer side of the lower half of the central column (5).
5. The linear electric actuator testing device according to claim 1, characterized in that: Two symmetrically distributed connecting frames (41) are fixed on the upper surface of the sealing plug (4), and the connecting frames (41) are arranged in an inverted "L" shape. A mounting frame (52) is fixed on the upper end surface of the central column (5), and the mounting frame (52) and the connecting frame (41) are staggered with each other.
6. The linear electric actuator testing device according to claim 1, characterized in that: A plurality of fixing pins (12) distributed in a circular array are fixed to the inner wall of the upper end of the sealing cylinder (1); a limiting frame (42) corresponding to the plurality of fixing pins (12) is provided at the edge of the upper surface of the sealing plug (4); a countersunk groove (43) is provided on the surface of the limiting frame (42) and the limiting frame is fixedly connected to the sealing plug (4) by bolts; the limiting frame (42) rotates with the sealing plug (4) and is buckled on the outside of the fixing pins (12).