A testing device for testing a test fixture and hydraulic actuator.

Abstract

This utility model discloses a test fixture and a testing device for testing hydraulic actuators. The test fixture includes a base plate; a longitudinally distributed and inclined inclined base is provided on the top of the base plate; a fixed trunnion mounting seat is fixedly provided at the rear end of the top surface of the inclined base; two fixed trunnion mounting plates are provided on the top of the fixed trunnion mounting seat; the two fixed trunnion mounting plates are connected to the left and right ends of the fixed trunnion; a slide rail is provided in the middle and front of the top surface of the inclined base; a slider is provided on the slide rail; a sliding trunnion mounting seat is provided on the top of the slider; two sliding trunnion mounting plates are provided on the top of the sliding trunnion mounting seat; the two sliding trunnion mounting plates are connected to the left and right ends of the sliding trunnion; the middle of the fixed trunnion is connected to the non-extension end of the test piece; the middle of the sliding trunnion is connected to the extension end of the test piece. This utility model effectively solves the problem of needing to test the extension and retraction function of hydraulic actuators during testing.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic actuator testing technology, and in particular to a test fixture and a test device for testing the extension and retraction functions of hydraulic actuators during testing. Background Technology

[0002] The test fixture is used to simulate the installation boundary of the test piece and can transfer the test piece to the vibration table to meet the vibration requirements in all directions. The test fixture can effectively transfer the motion of the vibration table to the test piece, ensuring consistency between input and output.

[0003] Currently, the connection between test fixtures and test pieces is mostly achieved by directly fixing them with bolts. This method is effective and efficient for some test pieces with a single state.

[0004] However, for special test pieces like hydraulic actuators, functional testing is required during the test. The specific requirements for functional testing are: the hydraulic actuator needs to extend and retract rapidly during the vibration test. If the traditional method of direct bolt fixing is used, it is impossible to test the extension and retraction function of the hydraulic actuator during the test, and the functional performance verification in the test cannot be achieved.

[0005] Therefore, there is an urgent need to develop a technology that can solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to address the technical deficiencies of the existing technology by providing a testing device for testing test fixtures and hydraulic actuators.

[0007] Therefore, this utility model provides a test fixture, including horizontally distributed base plates;

[0008] The top of the base plate is provided with longitudinally distributed and inclined sloping bases;

[0009] Among them, a fixed trunnion mounting seat is fixedly installed at the rear end of the top surface of the inclined base;

[0010] The top of the fixed trunnion mounting base is provided with two fixed trunnion mounting plates spaced apart from each other on the left and right;

[0011] Two fixed trunnion mounting plates are connected to the left and right ends of the horizontally distributed fixed trunnions;

[0012] Among them, the top middle and front of the inclined base are provided with slide rails;

[0013] A slider is provided on the slide rail that can slide back and forth;

[0014] The top of the slider is provided with a sliding trunnion mounting base;

[0015] The top of the sliding trunnion mounting base is provided with two sliding trunnion mounting plates spaced apart from each other on the left and right.

[0016] Two sliding trunnion mounting plates are connected to the left and right ends of the laterally distributed sliding trunnions;

[0017] The middle part of the fixed trunnion is connected to the non-telescopic end of the test piece that needs to be tested for extension and retraction functions;

[0018] The middle part of the sliding trunnion is connected to the telescopic end of the test piece.

[0019] In addition, this utility model also provides a testing device for hydraulic actuator testing, including the test fixture as described above;

[0020] The non-extension end of the hydraulic actuator to be tested is connected to the middle of the fixed trunnion in the test fixture;

[0021] The telescopic end of the hydraulic actuator is connected to the middle of the sliding trunnion in the test fixture.

[0022] As can be seen from the technical solution provided by this utility model above, compared with the prior art, this utility model provides a test fixture and a test device for testing hydraulic actuators. The design is scientific and effectively solves the problem of needing to test the extension and retraction function of hydraulic actuators in the test. The hydraulic actuator to be tested only needs to be installed on the fixture, and the extension and retraction end of the hydraulic actuator can move back and forth under its own matching hydraulic action, which has great practical significance.

[0023] Furthermore, the fixture of this invention has high rigidity. Through the cooperation between the various components, it can fix the hydraulic actuator, prevent the hydraulic actuator from shaking during the test, meet the reliability requirements of the test, and significantly improve the test efficiency. At the same time, this invention is also applicable to multiple hydraulic actuators of different sizes, which can effectively reduce the test cost and well meet the test requirements. Attached Figure Description

[0024] Figure 1 A three-dimensional structural diagram of a test fixture provided by this utility model;

[0025] Figure 2 The left view of the installation state of the test fixture provided by this utility model when connected to a hydraulic actuator, that is, the left view of the test device in the test of the test fixture and hydraulic actuator provided by this utility model;

[0026] In the diagram: 1-sloping base, 2-sliding trunnion, 3-fixed trunnion, 4-slide rail, 5-slider;

[0027] 6-Hydraulic actuator; 7-Base plate; 8-Reinforcing rib plate;

[0028] 20 - Sliding trunnion mounting base; 21 - Sliding trunnion mounting plate;

[0029] 30 - Fixed trunnion mounting base, 31 - Fixed trunnion mounting plate 31;

[0030] 61-First connecting block, 62-Power output shaft. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] See Figure 1 , Figure 2 This utility model provides a test fixture, including horizontally distributed base plates 7;

[0036] The top of the base plate 7 is provided with a longitudinally distributed and inclined inclined base 1;

[0037] Among them, a fixed trunnion mounting seat 30 is fixedly provided at the rear end of the top surface of the inclined base 1;

[0038] Two fixed trunnion mounting plates 31 are provided on the top of the fixed trunnion mounting base 30, which are spaced apart from each other on the left and right.

[0039] Two fixed trunnion mounting plates 31 are connected to the left and right ends of the laterally distributed fixed trunnions 3 (e.g., by insertion or by thread).

[0040] Among them, the top middle and front of the inclined base 1 are provided with slide rails 4;

[0041] A slider 5 is provided on the slide rail 4, which can slide back and forth;

[0042] The top of the slider 5 is provided with a sliding trunnion mounting seat 20;

[0043] The top of the sliding trunnion mounting base 20 is provided with two sliding trunnion mounting plates 21 that are spaced apart from each other on the left and right.

[0044] Two sliding trunnion mounting plates 21 are connected to the left and right ends of the laterally distributed sliding trunnions 2 (e.g., by insertion or by thread).

[0045] The middle part of the fixed trunnion 3 is connected to the non-telescopic end (such as one end of the main housing of the hydraulic actuator that does not extend or retract) of the test piece (such as the hydraulic actuator 6) that needs to be tested for extension and retraction functions.

[0046] The middle part of the sliding trunnion 2 is connected to the telescopic end of the test piece (e.g., the telescopic power output end on the front side of the test piece, specifically the telescopic power output shaft on the hydraulic actuator 6).

[0047] In this invention, specifically, the base plate 7 is located on top of a horizontally distributed test platform.

[0048] In this utility model, specifically, the vertical height of the inclined base 1 gradually increases from front to back.

[0049] In this utility model, specifically, the top of the inclined base 1 is connected to the slide rail 4 by a screw connection;

[0050] The sliding trunnion mounting base 20 is connected to the slider 5 by bolts.

[0051] In this utility model, specifically, the middle and rear ends of the left and right sides of the inclined base 1 are respectively fixedly connected to the top of the base plate 7 by a vertically distributed reinforcing rib plate 8 (a total of four reinforcing rib plates 8).

[0052] In this utility model, specifically, the fixed trunnion mounting plate 31 is fixed to the rear end of the top surface of the inclined base 1 by welding.

[0053] It should be noted that, for this utility model, considering the feasibility of the test fixture and fully taking into account flexibility and test stability, the inclined base 1 is connected to the slide rail 4 by screws, then the slider 5 is installed on the slide rail 4, the sliding trunnion 2 is connected to the slider 5 by bolts, and finally the fixed trunnion 3 is fixed to the inclined base 1 by welding. The two ends of the hydraulic actuator 6 are fixed to the sliding trunnion 2 and the fixed trunnion 3 by bolts. The sliding trunnion 3, installed on the top of the slider 5, slides on the slide rail 4, thereby driving the hydraulic actuator 6 to achieve the extension and retraction function test.

[0054] It should be noted that, for this utility model, regardless of whether the hydraulic actuator 6 is in the retracted or extended state, as long as the slider 5 and the sliding trunnion 2 slide to the corresponding positions, and cooperate with the fixing trunnion 3, the hydraulic actuator 6 can be fixed, and the rigidity meets the design requirements of the test fixture. It can not only fix the product and transfer the load of the test bench, but also ensure that the hydraulic actuator 6 can perform the retraction function test during the test, which greatly improves the test efficiency and saves labor costs.

[0055] In this invention, it should be noted that the slide rail 4 and the slider 5 are slidably connected, and the connection structure between them is a conventional slide rail and slider connection structure. For example, the slider 5 has a sliding opening groove that is slidably connected to the slide rail 4. The slide rail and slider connection structure is a well-known technology and will not be described in detail here.

[0056] In this utility model, specifically, the slider 5 is made of leaded brass, the sliding trunnion 2 is made of Q235 steel, and the remaining components of the fixture are made of 2A12 aluminum alloy, which ensures the rigidity and durability of the fixture. All the required raw materials are directly purchased from the market. By splicing, the motion of the vibration table can be effectively transmitted to the test piece, and the service life is also longer.

[0057] In this invention, specifically, the slider 5 is made of leaded brass and is embedded in the slide rail 4. The lead in the leaded brass exists as an independent phase, providing lubrication and reducing friction during the relative movement of the slide rail 4 and the slider 5. This ensures low relative movement resistance between the slider 5 and the slide rail 4, extends service life, and greatly facilitates the testing of the extension and retraction function of the hydraulic actuator 6. With the fixed trunnion 3, the hydraulic actuator can be fixed to the test platform using the fixture of this invention, preventing it from shaking during testing. This greatly improves testing efficiency and stability, reduces testing costs, and avoids inherent limitations.

[0058] It should be noted that leaded brass is an extremely important and widely used type of complex brass, possessing excellent wear resistance. Leaded brass contains less than 3% lead. The lead (Pb) exists in a free state within the microstructure, disrupting the matrix and giving leaded brass good machinability and friction reduction properties.

[0059] It should be noted that, in this utility model, the trunnion (i.e., sliding trunnion 2) connected to the retractable end of the hydraulic actuator 6 is designed to be slidable, which facilitates functional testing. In conjunction with the fixing trunnion 3, the hydraulic actuator 6 can be fixed and prevented from shaking during the test. Considering that the sliding resistance between the slider 5 and the slide rail 4 should be small and that jamming should not occur, the slider 5 is designed with leaded brass as the raw material and is embedded in the slide rail 4. Since the lead in the leaded brass exists as an independent phase, it has both lubricating and anti-friction effects, ensuring that no large friction is generated between the slider 5 and the slide rail 4, which facilitates the back-and-forth movement of the telescopic end of the hydraulic actuator 6.

[0060] Based on the test fixture provided by this utility model, see [link / reference]. Figure 2 This utility model also provides a testing device for hydraulic actuator testing, which includes the test fixture as described above;

[0061] The non-telescopic end of the hydraulic actuator 6 to be tested is connected to the middle of the fixed trunnion 3 in the test fixture;

[0062] The telescopic end of the hydraulic actuator 6 is connected to the middle of the sliding trunnion 2 in the test fixture.

[0063] In this utility model, specifically, the non-telescopic end of the hydraulic actuator 6 is the rear end of the main housing of the hydraulic actuator;

[0064] The telescopic end of the hydraulic actuator 6 is a telescopic power output shaft located on the front side of the hydraulic actuator 6.

[0065] In specific implementation, the rear end of the main housing of the hydraulic actuator 6 has a rearwardly protruding first connecting block 61;

[0066] The first connecting block 61 has a first mounting through hole;

[0067] The middle part of the fixed trunnion 3 in the test fixture passes through the first mounting through hole laterally;

[0068] The front end of the power output shaft 62 on the front side of the hydraulic actuator 6 has a second mounting through hole;

[0069] The middle part of the sliding trunnion 2 in the test fixture passes through the second mounting through hole laterally.

[0070] Compared with the prior art, the test fixture provided by this utility model has the following beneficial effects:

[0071] 1. The test fixture provided by this utility model can solve the problem of needing to perform extension and retraction function tests during the testing of hydraulic actuators;

[0072] 2. The test fixture provided by this utility model can be used to complete environmental tests of hydraulic actuators under different conditions without the need to redesign or manufacture new test fixtures;

[0073] 3. The test fixture provided by this utility model can ensure that the hydraulic actuator has good stability during the test;

[0074] 4. The test fixture provided by this utility model has a reasonable and scientific structure. The slider is made of leaded brass material, which is easy to maintain, has low labor costs, and the structural rigidity meets the test requirements.

[0075] In summary, by applying this invention, the problem of needing to test the extension and retraction function of hydraulic actuators during testing is effectively solved. The hydraulic actuator under test only needs to be installed on the fixture, and the extension and retraction ends of the hydraulic actuator can move back and forth under hydraulic pressure. Moreover, the fixture of this invention has high rigidity, and through the cooperation between the various components, the hydraulic actuator can be fixed, preventing the hydraulic actuator from shaking during the test, meeting the reliability requirements of the test, and significantly improving the test efficiency. At the same time, this invention is also applicable to hydraulic actuators of multiple different sizes, which can effectively reduce the test cost and well meet the test requirements.

[0076] Compared with existing traditional fixtures, the test fixture of this utility model uses a splicing design, which can support the retracting end (i.e. the power output end) of the hydraulic actuator to move back and forth, and can also prevent the hydraulic actuator from shaking during the test. At the same time, it can also meet the design principles and requirements of the fixture, effectively improving the testing capability of the hydraulic actuator, saving test costs and improving test efficiency.

[0077] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A test fixture, characterized in that, Including the horizontally distributed base plate (7); The top of the base plate (7) is provided with a longitudinally distributed and inclined inclined base (1); Among them, a fixed trunnion mounting seat (30) is fixedly provided at the rear end of the top surface of the inclined base (1). The top of the fixed trunnion mounting base (30) is provided with two fixed trunnion mounting plates (31) spaced apart from each other on the left and right. Two fixed trunnion mounting plates (31) are connected to the left and right ends of the horizontally distributed fixed trunnions (3); Among them, the top middle and front of the inclined base (1) are provided with slide rails (4). A slider (5) is provided on the slide rail (4) so ​​that it can slide back and forth; The top of the slider (5) is provided with a sliding trunnion mounting seat (20); The top of the sliding trunnion mounting base (20) is provided with two sliding trunnion mounting plates (21) spaced apart from each other on the left and right. Two sliding trunnion mounting plates (21) are connected to the left and right ends of the laterally distributed sliding trunnions (2); Among them, the middle part of the fixed trunnion (3) is connected to the non-telescopic end of the test piece that needs to be tested for extension and retraction functions; The middle part of the sliding trunnion (2) is connected to the telescopic end of the test piece.

2. The test fixture as described in claim 1, characterized in that, The base plate (7) is located on top of a horizontally distributed test platform.

3. The test fixture as described in claim 1, characterized in that, The vertical height of the inclined base (1) gradually increases from front to back.

4. The test fixture as described in claim 1 or 2, characterized in that, The top of the inclined base (1) is connected to the slide rail (4) by a screw connection; The sliding trunnion mounting base (20) is connected to the slider (5) by bolts; The fixed trunnion mounting plate (31) is fixed to the rear end of the top surface of the inclined base (1) by welding.

5. The test fixture as described in claim 1, characterized in that, The middle and rear ends of the left and right sides of the inclined base (1) are respectively fixedly connected to the top of the base plate (7) by a vertically distributed reinforcing rib plate (8).

6. The test fixture as described in claim 1, characterized in that, The slider (5) is made of leaded brass.

7. A testing device for hydraulic actuator testing, characterized in that, Includes the test fixture as described in any one of claims 1 to 6; The non-telescopic end of the hydraulic actuator (6) to be tested is connected to the middle of the fixed trunnion (3) in the test fixture; The telescopic end of the hydraulic actuator (6) is connected to the middle of the sliding trunnion (2) in the test fixture.

8. The test apparatus for hydraulic actuator testing as described in claim 7, characterized in that, The non-telescopic end of the hydraulic actuator (6) is the rear end of the main housing of the hydraulic actuator; The telescopic end of the hydraulic actuator (6) is a telescopic power output shaft located on the front side of the hydraulic actuator (6).

9. The test apparatus for hydraulic actuator testing as described in claim 7, characterized in that, The rear end of the main housing of the hydraulic actuator (6) has a rearwardly protruding first connecting block (61). The first connecting block (61) has a first mounting through hole; The middle part of the fixed trunnion (3) in the test fixture passes through the first mounting through hole laterally.

10. The test apparatus for hydraulic actuator testing as described in any one of claims 7 to 9, characterized in that, The front end of the power output shaft (62) on the front side of the hydraulic actuator (6) has a second mounting through hole; The middle part of the sliding trunnion (2) in the test fixture passes through the second mounting through hole laterally.

Images