Testing device for testing hydraulic cylinder

Abstract

The utility model discloses a testing device for testing a hydraulic cylinder, which relates to the technical field of hydraulic cylinder testing and comprises a mounting and bearing mechanism used for mounting a testing mechanism and a one-way limiting mechanism and placing the hydraulic cylinder to be tested at the same time; the test mechanism is used for testing the hydraulic cylinder to be tested; the one-way limiting mechanism comprises a plurality of locking grooves evenly formed in the outer side of the square longitudinal beam and a limiting sleeve arranged on the outer side of the square longitudinal beam in a sliding and sleeving mode in the vertical direction, and a locking pin is arranged on the outer side of the limiting sleeve in a sliding and penetrating mode. According to the utility model, the adjustment operation of the limiting sleeve can be realized directly in a downward sliding manner, the operation is more convenient, and the situation that the limiting sleeve moves upwards due to pressure in the test process and the test accuracy is influenced can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder testing technology, and in particular to a test device for testing hydraulic cylinders. Background Technology

[0002] Hydraulic cylinders are widely used hydraulic actuators that can convert hydraulic energy into mechanical energy and perform linear reciprocating motion or oscillating motion. After the hydraulic cylinders are manufactured, they need to undergo tests such as hydraulic stroke testing and hydraulic pressure testing to ensure that they meet the factory specifications.

[0003] A search revealed that the utility model patent with authorization announcement number CN221665024U discloses a test device for testing hydraulic cylinders. It uses a pressure sensor to measure the pressure of the hydraulic cylinder, a positioning detection rod to measure the hydraulic stroke, and flexibly positions and detects the pressure of each segment of the stroke. The test is flexible and convenient and meets the requirements for high pressure testing.

[0004] Although the above device can perform stroke and pressure tests on hydraulic cylinders, in actual testing, because the positioning sleeve that limits and locks the test plate is threadedly connected to the threaded rod, when the output pressure of the hydraulic cylinder under test is large, the test plate will push the positioning sleeve upward, which will cause the limiting to fail and affect the accuracy of the test results.

[0005] Therefore, it is necessary to invent a test device for testing hydraulic cylinders to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a testing device for hydraulic cylinders, which allows for the adjustment of the limiting sleeve by sliding it downwards, making operation more convenient. It also avoids the situation where the limiting sleeve moves upwards due to pressure during testing, affecting test accuracy. This addresses the problem mentioned in the background art where, during actual testing, the positioning sleeve used for limiting and locking the test plate is threadedly connected to the threaded rod. Therefore, when the output pressure of the hydraulic cylinder under test is high, the test plate pushes the positioning sleeve upwards, causing it to fail and affecting the accuracy of the test results.

[0007] According to one aspect of this disclosure, a test apparatus for testing hydraulic cylinders is provided, comprising:

[0008] The mounting support mechanism is used to install the test mechanism and the one-way limiting mechanism, and to place the hydraulic cylinder to be tested.

[0009] The testing mechanism is used to test the hydraulic cylinder under test; and

[0010] A one-way limiting mechanism includes multiple locking slots evenly spaced on the outside of a square longitudinal beam and a limiting sleeve slidably sleeved on the outside of the square longitudinal beam in the vertical direction. A locking pin is slidably inserted through the outside of the limiting sleeve. The inner end of the locking pin has an inclined surface that is adapted to any one of the locking slots. A pull plate is fixedly installed on the outer end of the locking pin. A return spring is sleeved on the outer side of the locking pin and fixedly connected between the limiting sleeve and the pull plate.

[0011] According to at least one embodiment of the hydraulic cylinder testing apparatus of the present disclosure, the mounting bearing mechanism includes a bearing base, and square longitudinal beams are fixedly provided on both sides of the top plate of the bearing base, and scales are fixedly provided on the front and back of the square longitudinal beams.

[0012] According to at least one embodiment of the hydraulic cylinder testing apparatus of this disclosure, a reinforcing crossbeam is fixedly provided at the top of the two scales, and a limiting protrusion is fixedly sleeved on the middle of the outer side of the square longitudinal beam.

[0013] According to at least one embodiment of the present disclosure, a test apparatus for testing a hydraulic cylinder includes a lifting plate that is slidably sleeved on the outside of two square longitudinal beams in a vertical direction, and the lifting plate has a T-shaped groove on its front side.

[0014] According to at least one embodiment of the hydraulic cylinder testing apparatus of this disclosure, a T-shaped slider is slidably inserted into the inner side of the T-shaped groove, a fixing plate is fixedly disposed at the bottom end of the T-shaped slider, a pressure detection unit is fixedly disposed at the bottom of the fixing plate, the output end of the pressure detection unit is connected to a PLC for processing data, the output end of the PLC is connected to a display for displaying pressure values, and both the pressure detection unit and the display are electrically connected to the PLC.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] This invention features a one-way limiting mechanism to facilitate downward adjustment of the limiting sleeve. When the limiting sleeve limits the lifting plate, it can be directly gripped from the inside and then slid downwards along the square longitudinal beam. During this process, the inner wall of the locking groove pushes the locking pin through the inclined surface, causing the locking pin to retract from the locking groove. Simultaneously, the locking pin pulls the return spring via a pull plate, causing the return spring to extend. After the limiting sleeve adjustment is complete, the extended return spring, through the pull plate, drives the inclined surface to insert into the adjacent locking groove for locking. When the lifting plate moves upwards due to the pressure of the tested hydraulic cylinder, the limiting sleeve blocks the lifting plate, while the inclined surface inside the locking groove limits the limiting sleeve. Compared to existing technologies, this invention allows for direct downward sliding adjustment of the limiting sleeve, making operation more convenient and preventing the limiting sleeve from moving upwards due to pressure during testing, which could affect test accuracy. Attached Figure Description

[0017] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0018] Figure 1 This is a schematic diagram of the overall structure of a test apparatus for testing a hydraulic cylinder according to one embodiment of the present disclosure.

[0019] Figure 2 This is a schematic diagram of the mounting support mechanism and the test mechanism of a hydraulic cylinder testing apparatus according to one embodiment of the present disclosure.

[0020] Figure 3 This is a schematic diagram of the one-way limiting mechanism of a test apparatus for testing hydraulic cylinders according to one embodiment of the present disclosure.

[0021] The specific labels in the attached figures are as follows:

[0022] 1. Install the load-bearing mechanism; 11. Load-bearing base; 12. Square longitudinal beam; 13. Scale; 14. Reinforcing crossbeam; 15. Limiting protrusion ring;

[0023] 2. Testing mechanism; 21. Lifting plate; 22. T-shaped slide; 23. T-shaped slider; 24. Fixing plate; 25. Pressure detection unit;

[0024] 3. One-way limit mechanism; 31. Locking groove; 32. Limiting sleeve; 33. Locking pin; 34. Inclined surface; 35. Pull plate; 36. Return spring. Detailed Implementation

[0025] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” other components or features would subsequently be positioned “above” said other components or features. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0026] Figure 1 This is a schematic diagram of the overall structure of a test apparatus for testing a hydraulic cylinder according to one embodiment of the present disclosure.

[0027] Figure 2 This is a schematic diagram of the mounting support mechanism 1 and the test mechanism 2 of a hydraulic cylinder testing apparatus according to one embodiment of the present disclosure.

[0028] Figure 3 This is a schematic diagram of the one-way limiting mechanism 3 of a test apparatus for testing hydraulic cylinders according to one embodiment of the present disclosure.

[0029] like Figures 1-3 As shown, the testing apparatus for testing hydraulic cylinders disclosed herein may include components such as a mounting and bearing mechanism 1, a testing mechanism 2, and a one-way limiting mechanism 3.

[0030] like Figure 2 As shown in this disclosure, the installation bearing mechanism 1 includes a bearing base 11. Square longitudinal beams 12 are fixedly installed on both sides of the top plate of the bearing base 11. Scales 13 are fixedly installed on the front and back of the square longitudinal beams 12. A reinforcing crossbeam 14 is fixedly installed at the top of the two scales 13. A limit protrusion ring 15 is fixedly sleeved on the middle of the outer side of the square longitudinal beams 12.

[0031] Therefore, the lifting plate 21 can be supported by the limiting protrusion 15, thereby preventing the lifting plate 21 from falling directly on the top of the bearing base 11. This allows the lifting plate 21 to be raised only slightly when the hydraulic cylinder under test is placed, instead of being raised significantly, thus reducing the difficulty of operation.

[0032] like Figure 2As shown, in a preferred embodiment, the test mechanism 2 includes a lifting plate 21 that is slidably sleeved on the outside of two square longitudinal beams 12 in a vertical direction. The lifting plate 21 has a T-shaped groove 22 on its front side. A T-shaped slider 23 is slidably inserted into the inner side of the T-shaped groove 22. A fixing plate 24 is fixedly installed at the bottom of the T-shaped slider 23. A pressure detection unit 25 is fixedly installed at the bottom of the fixing plate 24. The output end of the pressure detection unit 25 is connected to a PLC for processing data. The output end of the PLC is connected to a display for displaying pressure values. Both the pressure detection unit 25 and the display are electrically connected to the PLC.

[0033] Therefore, in order to facilitate the lifting plate 21 to be raised to form a clearance, the hydraulic cylinder under test is then placed at the top center of the bearing base 11, and the lifting plate 21 is released. At this time, the lifting plate 21 drives the pressure detection unit 25 to press on the top of the hydraulic cylinder output shaft. Observe the scale on the square longitudinal beam 12 corresponding to the lifting plate 21 at this time. Then, the hydraulic cylinder under test drives its output shaft to extend completely. At this time, observe the scale on the square longitudinal beam 12 corresponding to the lifting plate 21 again. The difference between the two is the hydraulic stroke of the hydraulic cylinder under test. Subsequently, the hydraulic cylinder under test drives its output shaft to retract. Then, the lifting plate 21 is limited by the one-way limit mechanism 3. Then, the hydraulic cylinder under test drives its output shaft to extend. The hydraulic cylinder under test continuously applies pressure to the pressure detection unit 25. At this time, the pressure detection unit 25 detects the working pressure of the hydraulic cylinder under test and sends the detection signal to the PLC. The PLC then displays the specific data on the display.

[0034] It should also be noted that the pressure detection unit 25 is a pressure sensor. The pressure detection unit 25, PLC and display are all solutions that have been disclosed in the prior art and are not essential technical features of this application. Therefore, this application will not elaborate on their specific models here.

[0035] like Figure 3 As shown in this disclosure, the one-way limiting mechanism 3 includes multiple locking grooves 31 evenly opened on the outside of the square longitudinal beam 12 and a limiting sleeve 32 slidably sleeved on the outside of the square longitudinal beam 12 in the vertical direction. A locking pin 33 is slidably passed through the outside of the limiting sleeve 32. The inner end of the locking pin 33 is provided with an inclined surface 34 and is adapted to any one of the locking grooves 31. A pull plate 35 is fixedly provided on the outer end of the locking pin 33. A return spring 36 is sleeved on the outside of the locking pin 33 and fixedly connected between the limiting sleeve 32 and the pull plate 35.

[0036] Therefore, to facilitate downward adjustment of the limiting sleeve 32, when the limiting sleeve 32 limits the lifting plate 21, it can be directly gripped from the inside of the limiting sleeve 32, and then slid downward along the square longitudinal beam 12. During this process, the inner wall of the locking groove 31 pushes the locking pin 33 through the inclined surface 34, thereby causing the locking pin 33 to exit from the inside of the locking groove 31. During this process, the locking pin 33 pulls the return spring 36 through the pull plate 35, causing the return spring 36 to extend. After the limiting sleeve 32 is adjusted, it is... The elongated return spring 36 is driven by the pull plate 35 to insert the inclined surface 34 into the inner side of the adjacent locking groove 31 for locking. When the lifting plate 21 moves upward due to the push of the hydraulic cylinder under test, the limiting sleeve 32 blocks the lifting plate 21. At the same time, the inclined surface 34 located inside the locking groove 31 limits the limiting sleeve 32. Compared with the prior art, the adjustment operation of the limiting sleeve 32 can be achieved directly by sliding downward, which is more convenient. At the same time, it can avoid the situation where the limiting sleeve 32 moves upward due to pressure during the test, which affects the test accuracy.

[0037] It should also be noted that any content not described in detail in this specification is prior art known to those skilled in the art.

[0038] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A test device for hydraulic cylinder testing, characterized in that The utility model relates to a hydraulic cylinder test device, including: The installation bearing mechanism is used for installing test mechanism and one-way limiting mechanism, and placing the hydraulic cylinder to be tested; The test mechanism is used for testing the hydraulic cylinder to be tested; and The one-way limiting mechanism includes a plurality of locking grooves evenly arranged on the outer side of the square longitudinal beam and a limiting sleeve slidingly sleeved on the outer side of the square longitudinal beam in the vertical direction, a locking pin is slidingly arranged on the outer side of the limiting sleeve, an inclined surface is arranged on the inner end of the locking pin and is matched with any locking groove, a pull plate is fixedly arranged on the outer end of the locking pin, and a return spring is sleeved on the outer side of the locking pin and fixedly connected between the limiting sleeve and the pull plate.

2. The test device for testing a hydraulic cylinder according to claim 1, characterized in that: The installation bearing mechanism includes a bearing base, scale rulers are fixedly arranged on the top plate of the bearing base on both sides, and scale rulers are fixedly arranged on the front and back surfaces of the square longitudinal beam.

3. The test device for testing a hydraulic cylinder according to claim 2, characterized in that: Two scale rulers are fixedly arranged on the top end of the square longitudinal beam, and a reinforcing cross beam is fixedly arranged on the top end of the square longitudinal beam.

4. The test device for testing a hydraulic cylinder according to claim 3, characterized in that: The test mechanism includes a lifting plate slidingly sleeved on the outer side of the two square longitudinal beams in the vertical direction, and a T-shaped sliding groove is arranged on the front surface of the lifting plate.

5. The test device for testing a hydraulic cylinder according to claim 4, characterized in that: A T-shaped sliding block is slidingly inserted into the T-shaped sliding groove, a fixed plate is fixedly arranged on the bottom end of the T-shaped sliding block, a pressure detection unit is fixedly arranged on the bottom of the fixed plate, an output end of the pressure detection unit is connected with a PLC for processing data, an output end of the PLC is connected with a display for displaying the pressure value, and the pressure detection unit and the display are electrically connected with the PLC.

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