Swinging hydraulic cylinder service life testing device and swinging hydraulic cylinder service life testing system

Abstract

The utility model relates to the technical field of testing fluid pressure actuating systems, in particular to a swing hydraulic cylinder service life testing device and a swing hydraulic cylinder service life testing system. A swing hydraulic cylinder service life testing system comprises a hydraulic station and a swing hydraulic cylinder service life testing device, the hydraulic station is used for being connected with a swing hydraulic cylinder, the swing hydraulic cylinder service life testing device comprises a fixing frame, a testing assembly and a loading mechanism, and the testing assembly is arranged on the fixing frame. The test assembly is provided with an installation position which is used for vertically arranging the rotation axis of the swing hydraulic cylinder and enabling the swing output end of the swing hydraulic cylinder to be arranged downwards, the loading mechanism is provided with a loading connection end connected with the swing output end, and the installation position is provided with a rotary encoder; the rotary encoder is used for being connected with the swing output end of the swing hydraulic cylinder in a rotation stopping mode so as to test the swing angle and operation times of the swing hydraulic cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of testing fluid pressure actuation systems, in particular to a swing hydraulic cylinder life test device and a swing hydraulic cylinder life test system. Background Art

[0002] Hydraulic cylinders have the characteristics of simple structure, easy manufacturing, reliable operation, and convenient layout, and have been widely used in hydraulic systems. As the actuator of the hydraulic system, hydraulic cylinders can be basically divided into several categories: piston cylinders, plunger cylinders, swing cylinders, and special cylinders. Among them, the swing cylinder converts hydraulic energy into mechanical energy of rotation less than 360 degrees. Its characteristics are large output torque, low-speed rotation, good controllability, and low efficiency.

[0003] The swing hydraulic cylinder is a tightly assembled accessory that uses hydraulic pressure to generate very high torque in a small space. It uses a combined spiral gear structure inside, and the entire swing hydraulic cylinder can generate a large torque in a small space. At the same time, the swing hydraulic cylinder usually also bears a large overturning moment load. Under the combined effect of this large torque and large overturning moment, the swing hydraulic cylinder often has problems such as oil leakage and internal leakage after being used for a period of time. The manufacturer needs to perform a life test on the swing hydraulic cylinder to clarify the maintenance cycle and the life of the swing cylinder.

[0004] Different equipment uses the swing hydraulic cylinder in different ways, and the test needs to be carried out according to the actual working conditions of the equipment. The utility model patent with the authorization announcement number CN218408012U discloses a hydraulic swing cylinder limit load test device, including a base mounting bracket; a swing cylinder mounting seat, fixedly mounted on the base mounting bracket; an encoder group, mounted on the swing cylinder mounting seat; a force arm, one end of which is connected to the encoder group through a connecting rod, and the other end is equipped with a load cake for testing the swing cylinder. The hydraulic swing cylinder of the above-mentioned hydraulic swing cylinder limit load test device is horizontally suspended on the swing cylinder mounting seat, and the rotation axis of the hydraulic swing cylinder is also in the horizontal direction. The force arm rotates coaxially with the hydraulic swing cylinder. For the hydraulic swing cylinder between the telescopic arm of the aerial work vehicle and the working bucket at the end of the telescopic arm, its load direction is generally in the vertical direction. Therefore, using the loading mechanism of the existing hydraulic swing cylinder limit load test device for testing will lead to inaccurate test results. Utility Model Content

[0005] The utility model aims to provide a swing hydraulic cylinder life test device, which is used to solve the problem that for a swing hydraulic cylinder between a telescopic arm of an aerial work vehicle and a working bucket at the end of the telescopic arm, using a loading mechanism of an existing hydraulic swing cylinder limit load test device for testing may lead to inaccurate test results.

[0006] The utility model adopts the following technical scheme: a swing hydraulic cylinder life test device, comprising a fixed frame, a test component and a loading mechanism, wherein the test component is arranged on the fixed frame, and the test component has a mounting position for vertically arranging the rotation axis of the swing hydraulic cylinder and setting its swing output end downward, the loading mechanism has a loading connection end connected to the swing output end, and a rotary encoder is arranged on the mounting position, and the rotary encoder is used to be connected to the swing output end of the swing hydraulic cylinder to test the swing angle and operation times of the swing hydraulic cylinder.

[0007] Furthermore, the loading mechanism includes a working bucket, the working bucket has a horizontal connecting arm, and the horizontal connecting arm constitutes a loading connecting end of the loading mechanism.

[0008] Furthermore, the fixing frame includes a base and a supporting frame, the supporting frame is arranged on the base, and the testing assembly is fixedly connected to the supporting frame.

[0009] Furthermore, the supporting stand is a polygonal column structure surrounded by a plurality of vertical plates, and there are a plurality of test components, which are arranged on each side of the polygonal column.

[0010] Furthermore, the test assembly comprises a support cantilever horizontally mounted on a support stand, and the mounting position is provided on the support cantilever.

[0011] Furthermore, a reinforcement structure is provided on a side of the vertical plate facing away from the supporting cantilever.

[0012] Furthermore, a mounting plate is provided on the vertical plate, and the supporting cantilever is assembled on the mounting plate.

[0013] Furthermore, the supporting cantilever includes a horizontal plate body and a reinforced folded edge.

[0014] Furthermore, the reinforced folded edge is a triangular plate connected to the horizontal plate body and the mounting plate.

[0015] The swing hydraulic cylinder life test device of the utility model improves the existing hydraulic swing cylinder limit load test device. The beneficial effect of the swing hydraulic cylinder life test device of the utility model is: by arranging the fixed frame with a test component, the installation position of the test component can vertically arrange the rotation axis of the swing hydraulic cylinder, and make the swing output end of the swing hydraulic cylinder downwardly arranged to be connected with the loading connection end of the loading mechanism, and a rotary encoder is arranged on the installation position, and the rotary encoder is used to be connected with the swing output end of the swing hydraulic cylinder to test the swing angle and the number of operations of the swing hydraulic cylinder to detect its life. In this way, the rotation axis of the swing output end of the swing hydraulic cylinder is in the vertical direction. For the swing hydraulic cylinder between the telescopic arm of the aerial work vehicle and the working bucket at the end of the telescopic arm, the loading direction of the loading connection end of the loading mechanism is also in the vertical direction, so that the life test result of the swing hydraulic cylinder is more accurate and reliable.

[0016] The utility model aims to provide a swing hydraulic cylinder life test system, which is used to solve the problem that for a swing hydraulic cylinder between a telescopic arm of an aerial work vehicle and a working bucket at the end of the telescopic arm, using a loading mechanism of an existing hydraulic swing cylinder limit load test device for testing may lead to inaccurate test results.

[0017] The utility model adopts the following technical scheme: a swing hydraulic cylinder life test system, comprising a hydraulic station and a swing hydraulic cylinder life test device, the hydraulic station is used to connect with the swing hydraulic cylinder, the swing hydraulic cylinder life test device comprises a fixed frame, a test component and a loading mechanism, the test component is arranged on the fixed frame, the test component has a mounting position for vertically arranging the rotation axis of the swing hydraulic cylinder and setting its swing output end downward, the loading mechanism has a loading connection end connected with the swing output end, a rotary encoder is arranged on the mounting position, and the rotary encoder is used to be connected with the swing output end of the swing hydraulic cylinder to test the swing angle and operation times of the swing hydraulic cylinder.

[0018] Furthermore, the loading mechanism includes a working bucket, the working bucket has a horizontal connecting arm, and the horizontal connecting arm constitutes a loading connecting end of the loading mechanism.

[0019] Furthermore, the fixing frame includes a base and a supporting frame, the supporting frame is arranged on the base, and the testing assembly is fixedly connected to the supporting frame.

[0020] Furthermore, the supporting stand is a polygonal column structure surrounded by a plurality of vertical plates, and there are a plurality of test components, which are arranged on each side of the polygonal column.

[0021] Furthermore, the test assembly comprises a support cantilever horizontally mounted on a support stand, and the mounting position is provided on the support cantilever.

[0022] Furthermore, a reinforcement structure is provided on a side of the vertical plate facing away from the supporting cantilever.

[0023] Furthermore, a mounting plate is provided on the vertical plate, and the supporting cantilever is assembled on the mounting plate.

[0024] Furthermore, the supporting cantilever includes a horizontal plate body and a reinforced folded edge.

[0025] Furthermore, the reinforced folded edge is a triangular plate connected to the horizontal plate body and the mounting plate.

[0026] The swing hydraulic cylinder life test system of the utility model improves the existing hydraulic swing cylinder limit load test device. The beneficial effects of the swing hydraulic cylinder life test system of the utility model are: the hydraulic station provides hydraulic power for the swing hydraulic cylinder, and by arranging the fixed frame with a test component, the installation position of the test component can vertically arrange the rotation axis of the swing hydraulic cylinder, and make the swing output end of the swing hydraulic cylinder downwardly arranged to be connected with the loading connection end of the loading mechanism, and a rotary encoder is arranged on the installation position, and the rotary encoder is used to be connected with the swing output end of the swing hydraulic cylinder to test the swing angle and the number of operations of the swing hydraulic cylinder to detect its life, so that the rotation axis of the swing output end of the swing hydraulic cylinder is in the vertical direction, and for the swing hydraulic cylinder between the telescopic arm of the aerial work vehicle and the working bucket at the end of the telescopic arm, the loading direction of the loading connection end of the loading mechanism is also in the vertical direction, so that the life test result of the swing hydraulic cylinder is more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a fixing frame of an embodiment of a swing hydraulic cylinder life test system of the utility model;

[0028] Figure 2 It is a structural schematic diagram of a hydraulic station, a fixing frame and a test assembly equipped with a swing hydraulic cylinder of an embodiment of the swing hydraulic cylinder life test system of the utility model;

[0029] Figure 3 It is a structural schematic diagram of an embodiment of the swing hydraulic cylinder life test system of the utility model.

[0030] In the figure: 1. base; 2. support frame; 3. reinforcement structure; 4. mounting plate; 5. support cantilever; 6. rotary encoder; 10. swing hydraulic cylinder; 20. hydraulic station; 30. working bucket; 31. horizontal connecting arm. DETAILED DESCRIPTION

[0031] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0032] First, the technical solution of the utility model is generally described as follows:

[0033] The utility model is based on the existing life test device for a swing hydraulic cylinder. Since the hydraulic swing cylinder is horizontally suspended on a swing cylinder mounting seat, the rotation axis of the hydraulic swing cylinder is in a horizontal direction, and the force arm rotates coaxially with the hydraulic swing cylinder. As for the swing hydraulic cylinder between the telescopic arm of an aerial work vehicle and the working bucket at the end of the telescopic arm, its load direction is generally in a vertical direction. Therefore, using the loading mechanism of the existing hydraulic swing cylinder limit load test device for testing may lead to inaccurate test results.

[0034] Based on the above problems, in order to set the rotation axis of the swing hydraulic cylinder to a vertical direction, so as to adapt to the swing hydraulic cylinder between the telescopic arm of the aerial work vehicle and the working bucket at the end of the telescopic arm, the utility model designs a swing hydraulic cylinder life test system, and conceives how to assemble the swing hydraulic cylinder so that the rotation axis of the swing hydraulic cylinder is in a vertical direction, which matches the vertical loading direction of the loading mechanism and is convenient for testing the swing hydraulic cylinder. The following technical scheme is specifically adopted: The swing hydraulic cylinder life test system of the utility model includes a hydraulic station and a swing hydraulic cylinder life test device, the swing hydraulic cylinder life test device includes a fixed frame, a test component and a loading mechanism, the test component is arranged on the fixed frame, and the test component Used to assemble a swing hydraulic cylinder, the test component has a mounting position for vertically arranging the rotation axis of the swing hydraulic cylinder so that the swing output end of the swing hydraulic cylinder is set downward, and the loading mechanism has a loading connection end connected to the swing output end. A rotary encoder is arranged on the mounting position, and the rotary encoder is used to be fixedly connected to the swing output end of the swing hydraulic cylinder to test the swing angle and number of operations of the swing hydraulic cylinder. In this way, the rotation axis of the swing output end of the swing hydraulic cylinder is in a vertical direction. For the swing hydraulic cylinder between the telescopic arm of the aerial work vehicle and the working bucket at the end of the telescopic arm, the loading direction of the loading connection end of the loading mechanism is also in a vertical direction, so that the life test result of the swing hydraulic cylinder is more accurate and reliable.

[0035] Specific embodiment of the swing hydraulic cylinder life test system of the utility model:

[0036] In order to more clearly illustrate the structure and application scenarios of the swing hydraulic cylinder life test system, this embodiment is described in detail using the swing hydraulic cylinder life test system and the swing hydraulic cylinder in combination.

[0037] The structural schematic diagram of the swing hydraulic cylinder life test system of the utility model is as follows Figure 1-3As shown, a swing hydraulic cylinder life test system includes a hydraulic station 20, the hydraulic station 20 is integrated with an electromagnetic reversing valve, a hydraulic pump, and a radiator, wherein the hydraulic pump provides hydraulic power for the swing hydraulic cylinder 10, the electromagnetic reversing valve is used to realize the reversal of the swing hydraulic cylinder 10, and the radiator is used to dissipate heat from the oil tank to avoid excessive oil temperature during long-term operation of the equipment. The swing hydraulic cylinder life test system of the utility model also includes a swing hydraulic cylinder life test device, the swing hydraulic cylinder life test device includes a fixed frame, a test assembly and a loading mechanism, the test assembly is arranged on the fixed frame, the test assembly has a mounting position for vertically arranging the rotation axis of the swing hydraulic cylinder 10, and the swing output end of the swing hydraulic cylinder 10 is arranged downward, the loading mechanism has a loading connection end connected to the swing output end, in this embodiment, the loading connection end of the loading mechanism is arranged below the mounting position, and a rotary encoder 6 is arranged on the mounting position, and the rotary encoder 6 is used to be connected to the swing output end of the swing hydraulic cylinder 10 to test the swing angle and operation times of the swing hydraulic cylinder 10.

[0038] Specifically, the loading mechanism includes a working bucket 30, which has a horizontal connecting arm 31. The horizontal connecting arm 31 constitutes the loading connecting end of the loading mechanism. The swing output end of the swing hydraulic cylinder 10 is connected to the horizontal connecting arm 31 of the working bucket 30. The working bucket 30 swings in the vertical direction. The horizontal connecting arm 31 of the working bucket 30 provides a loading force to the swing hydraulic cylinder 10 so that the rotation axis of the swing hydraulic cylinder 10 and the loading direction of the working bucket 30 are both in the vertical direction. It is easy to use and ensures good test results.

[0039] In order to ensure the stability of the fixed frame, the swing hydraulic cylinder 10 can be better supported. Preferably, the fixed frame includes a base 1 and a support frame 2. The base 1 is a horizontal circular plate, which can increase the support area with the ground or the operating table to ensure that the fixed frame can be stable. The support frame 2 is set on the base 1 to ensure the stability of the structure. The support frame 2 is used to assemble the test component. The test component is fixedly connected to the support frame 2. The test component is vertically arranged on the support frame 2, so that the test component has a horizontal installation position for vertically arranging the rotation axis of the swing hydraulic cylinder 10. Of course, in other embodiments, the fixed frame can also be set as a frame structure with a leg structure, and the side wall of the frame is provided with a support plate for assembling the test component.

[0040] Since there are many different types of swing hydraulic cylinders 10, different swing hydraulic cylinders 10 can be tested. When it is necessary to compare the swing hydraulic cylinders 10, if each fixed frame can only be equipped with one test component for testing, it is also necessary to test and record each swing hydraulic cylinder 10 in sequence. Therefore, in order to facilitate the testing of multiple swing hydraulic cylinders 10 and make the testing process more convenient and easy to compare, preferably, the support frame 2 is a polygonal column structure surrounded by multiple vertical plates, and there are multiple test components, which are arranged on each side of the polygonal column. In this way, each side of the support frame 2 can be equipped with a swing hydraulic cylinder 10 through the test component, and the hydraulic station 20 has multiple test oil circuits. Then, the swing hydraulic cylinders 10 are connected to each other through the hydraulic station 20 at the same time, and each swing hydraulic cylinder 10 is tested at the same time.

[0041] Specifically, when considering how to set up the test assembly, in order to facilitate assembly and ensure good assembly strength, preferably, the test assembly includes a support cantilever 5 horizontally mounted on the support frame 2, and a mounting position is provided on the support cantilever 5. The swing hydraulic cylinder 10 is assembled through the support cantilever 5. The structural strength is high, and the support cantilever 5 is convenient for assembling the swing hydraulic cylinder 10, and the support cantilever 5 and the support frame 2 are also convenient for assembly.

[0042] Since the support frame 2 is surrounded by multiple vertical plate structures, it is easy to shake during use. In order to further enhance the structural strength of the support frame 2 and ensure that it can better bear the swing hydraulic cylinder 10, preferably, a reinforcing structure 3 is provided on the side of the vertical plate facing away from the supporting cantilever 5. The structural strength of the vertical plate is enhanced by the reinforcing structure 3. In this way, there are assembly structures on both sides of the vertical plate, which will not make the side of the assembled supporting cantilever 5 bear too much force, causing the vertical plate to bend. The reinforcing structure 3 is arranged on the side away from the supporting cantilever 5 to better ensure the structural strength of the vertical plate, and is convenient for production and assembly. The assembly area is larger, and it is easier to strengthen the structural strength of the support frame 2 as a whole. This arrangement method is convenient for structural arrangement and has better structural stability. Specifically, multiple channel steels are vertically fixed on the vertical plate, and horizontal reinforcing plates are arranged between the channel steels to increase the thickness and structural strength of the support frame 2.

[0043] Of course, in other embodiments, the reinforcing structure 3 can be set at other positions of the vertical plate that are different from the position of the assembly support cantilever 5, and can all play a reinforcing role on the support frame 2. Specifically, the reinforcing structure 3 can be set on both sides of the bottom of the vertical plate, so that the support frame 2 has higher stability.

[0044] In this embodiment, there are three vertical plates, which form a triangular prism, the reinforcement structure 3 is located inside the triangular prism, and the support cantilever 5 is evenly arranged outside each vertical plate. The triangle has higher stability, which makes the overall structure of the fixed frame more stable, and then the three swing hydraulic cylinders 10 can be tested at the same time, which has better applicability. Of course, in other embodiments, the vertical plates can also be set to four, so that the support frame 2 forms a square column structure.

[0045] Furthermore, each vertical plate is provided with a plurality of mounting holes for assembling the supporting cantilever 5, and the supporting cantilever 5 can be directly assembled with the mounting holes on the vertical plate, but since the supporting cantilever 5 has a relatively long structure, a higher assembly strength is required. Preferably, a mounting plate 4 is mounted on the vertical plate through the mounting holes, and the supporting cantilever 5 is horizontally mounted on the mounting plate 4. The mounting plate 4 plays a certain supporting and reinforcing role on the supporting cantilever 5, so that the reliability of the assembly of the supporting cantilever 5 is higher, and the structural strength of each vertical plate of the supporting frame 2 is further enhanced.

[0046] Specifically, since the support cantilever 5 is used to assemble the swing hydraulic cylinder 10, the support cantilever 5 also needs to ensure a certain structural strength. In this embodiment, preferably, the support cantilever 5 includes a horizontal plate body and a reinforced folded edge. The horizontal plate body is used to assemble the swing hydraulic cylinder 10, and the reinforced folded edge is used to further improve the structural strength of the support cantilever 5.

[0047] In order not to affect the assembly of the swing hydraulic cylinder 10, in this embodiment, the reinforcing folding edge is preferably set as a triangular plate connected to the horizontal plate body and the mounting plate 4. The triangular plate is a right angle, and the two right angle sides are respectively connected to the horizontal plate body and the mounting plate 4. This ensures the structural strength of the support cantilever 5 on the one hand, and does not affect the assembly of the swing hydraulic cylinder 10 on the other hand. A bottom reinforcing plate is also extended from the bottom of the horizontal plate body through the mounting plate 4 to further ensure the supporting effect for the support cantilever 5. In order to facilitate assembly and facilitate cooperation with the hydraulic cylinder and the working bucket 30, preferably, the installation position for assembling the swing hydraulic cylinder 10 is set at the end of the horizontal plate body away from the support frame 2.

[0048] Through the above description of the specific embodiment of the swing hydraulic cylinder life test system of the utility model, it can be seen that in the swing hydraulic cylinder life test system of the utility model, the hydraulic station provides hydraulic power for the swing hydraulic cylinder, and by providing a test component on the fixed frame, the installation position of the test component can vertically arrange the rotation axis of the swing hydraulic cylinder, and make the swing output end of the swing hydraulic cylinder downwardly arranged to be connected with the loading connection end of the loading mechanism, and a rotary encoder is provided on the installation position, which is used to be fixedly connected with the swing output end of the swing hydraulic cylinder to test the swing angle and the number of operations of the swing hydraulic cylinder to detect its life, so that the rotation axis of the swing output end of the swing hydraulic cylinder is in the vertical direction, and for the swing hydraulic cylinder between the telescopic arm of the aerial work vehicle and the working bucket at the end of the telescopic arm, the loading direction of the loading connection end of the loading mechanism is also in the vertical direction, so that the life test result of the swing hydraulic cylinder is more accurate and reliable.

[0049] The embodiment of the swing hydraulic cylinder life test device of the utility model is the same as the embodiment of the swing hydraulic cylinder life test device in the above-mentioned swing hydraulic cylinder life test system, so it is not described again.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A life test device for a swing hydraulic cylinder, comprising a fixing frame, a test assembly and a loading mechanism, characterized in that: The test component is arranged on a fixed frame, and the test component has a mounting position for vertically arranging the rotation axis of the swing hydraulic cylinder and setting its swing output end downward. The loading mechanism has a loading connection end connected to the swing output end. A rotary encoder is arranged on the mounting position, and the rotary encoder is used to be connected to the swing output end of the swing hydraulic cylinder to prevent rotation so as to test the swing angle and operation times of the swing hydraulic cylinder.

2. The swing hydraulic cylinder life test device according to claim 1 is characterized in that: The loading mechanism comprises a working bucket, the working bucket has a horizontal connecting arm, and the horizontal connecting arm constitutes a loading connecting end of the loading mechanism.

3. The swing hydraulic cylinder life test device according to claim 1 or 2, characterized in that: The fixing frame comprises a base and a supporting frame, the supporting frame is arranged on the base, and the testing assembly is fixedly connected to the supporting frame.

4. The swing hydraulic cylinder life test device according to claim 3 is characterized in that: The supporting stand is a polygonal column structure surrounded by a plurality of vertical plates. There are a plurality of test components, and the test components are arranged on each side of the polygonal column.

5. The swing hydraulic cylinder life test device according to claim 4 is characterized in that: The test assembly comprises a support cantilever horizontally mounted on a support stand, and the support cantilever is provided with the mounting position.

6. The swing hydraulic cylinder life test device according to claim 5 is characterized in that: A reinforcement structure is arranged on one side of the vertical plate facing away from the supporting cantilever.

7. The swing hydraulic cylinder life test device according to claim 5 is characterized in that: The vertical plate is provided with a mounting plate, and the supporting cantilever is assembled on the mounting plate.

8. The swing hydraulic cylinder life test device according to claim 5 is characterized in that: The supporting cantilever comprises a horizontal plate body and a reinforced folded edge.

9. The swing hydraulic cylinder life test device according to claim 8, characterized in that: The reinforcing folded edge is a triangular plate connected to the horizontal plate body and the mounting plate.

10. A swing hydraulic cylinder life test system, comprising a hydraulic station and a swing hydraulic cylinder life test device, wherein the hydraulic station is used to connect with the swing hydraulic cylinder, and is characterized in that: The swing hydraulic cylinder life test device is the swing hydraulic cylinder life test device as described in any one of claims 1-9.

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