A hydraulic component testing device

Abstract

This invention relates to the field of hydraulic cylinder testing technology, specifically a hydraulic component testing device, including a testing platform and a cylinder support, and further comprising: multiple clamping plates, each respectively disposed on the testing platform; an oil leakage detection unit, disposed on the testing platform and connected to the clamping plates, for driving the clamping plates to move towards the cylinder and fit against the cylinder's oil port; and a stroke detection unit, disposed on the testing platform, for detecting the cylinder's working stroke when the piston rod of the cylinder extends to its end. This hydraulic component testing device allows operators to achieve integrated testing of the cylinder's sealing performance and working stroke during cylinder testing through the cooperation of the oil leakage detection unit and the stroke detection unit, avoiding the cumbersome process of traditional step-by-step operations, significantly improving testing efficiency, and is particularly suitable for the rapid testing of batches of hydraulic cylinders.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder testing technology, specifically to a hydraulic component testing device. Background Technology

[0002] Hydraulic cylinders are key actuators in hydraulic systems and are widely used in engineering machinery, metallurgical equipment, aerospace and other fields. Their performance directly affects the stability and reliability of the system. During operation, cylinders must meet strict sealing requirements (to prevent oil leakage) and accurate stroke control. Therefore, the testing process before leaving the factory or after maintenance is crucial.

[0003] However, in practical use, we found that oil leakage detection and stroke detection of hydraulic cylinders usually require independent testing procedures and equipment. The operation process is not continuous, resulting in a long testing cycle and difficulty in meeting the needs of batch testing. This not only increases the testing time but also makes it difficult to achieve efficient and accurate automated testing. Therefore, we propose a hydraulic component testing device. Summary of the Invention

[0004] One of the technical problems to be solved in this application is: how to design a hydraulic component detection device that can detect oil leakage and stroke of hydraulic cylinders.

[0005] To address the aforementioned technical problems, this application provides a hydraulic component testing device, which includes a testing platform and a cylinder support, and further comprises:

[0006] Multiple clamping plates are respectively disposed on the detection table;

[0007] An oil leakage detection unit is set on a detection platform and connected to a clamping plate. It is used to drive the clamping plate to move towards the oil cylinder and fit into the oil port of the oil cylinder.

[0008] A stroke detection unit is installed on a testing platform to detect the working stroke of the hydraulic cylinder when the piston rod of the hydraulic cylinder extends to its end.

[0009] In some embodiments, the oil leakage detection unit includes two mounting brackets that are movably disposed on both sides of the detection platform, a plurality of clamping plates that are disposed on the side of the mounting brackets near the oil cylinder, and a displacement component that is provided on the detection platform for driving the mounting brackets to shift and adjust.

[0010] In some embodiments, the displacement member includes a fixed base disposed on a detection table, a bidirectional lead screw rotatably disposed on the fixed base, a drive motor disposed on the fixed base, the output end of the drive motor being connected to the bidirectional lead screw, a guide rod disposed on the fixed base, a mounting bracket slidably sleeved on the guide rod, and the mounting bracket being threadedly connected to both sides of the bidirectional lead screw.

[0011] In some embodiments, the clamping plate includes an arc-shaped plate disposed on the mounting bracket, a bonding plate disposed on the top of the arc-shaped plate, a compensation plate disposed on the end of the arc-shaped plate near the cylinder body of the oil cylinder, and oil-absorbing cotton disposed on the side of the arc-shaped plate, the bonding plate and the compensation plate near the oil cylinder by Velcro.

[0012] In some embodiments, the top of the bonding plate is provided with an upper sealing plate, the height of the upper sealing plate near the center is higher than the height of the side away from the center, and oil-absorbing cotton is provided on the side of the upper sealing plate away from the center.

[0013] In some embodiments, any of the mounting brackets includes a fixed plate threaded onto a bidirectional lead screw, a limiting plate is provided on the top of the fixed plate, a rotating shaft is rotatably provided on the limiting plate, a connecting frame is provided on the rotating shaft, the arc-shaped plates on adjacent sides are respectively provided on the connecting frame, a torsion spring is sleeved on the outside of the rotating shaft, the two ends of the torsion spring are respectively connected to the connecting frame and the limiting plate, a fixed gear is provided on the rotating shaft, and a fixed rack that cooperates with the fixed gear is provided on the detection table.

[0014] In some embodiments, the stroke detection unit includes a sliding frame mounted on a mounting bracket on the side away from the fixed rack, a bent rod slidably disposed within the sliding frame, a locking element disposed between the sliding frame and the bent rod for locking and positioning the bent rod, and a detection element disposed on the bent rod for detecting the stroke of the hydraulic cylinder.

[0015] In some embodiments, the bent rod has a plurality of threaded holes on the side near the sliding frame, the locking member includes a fastening bolt that is threadedly connected to the threaded holes, and the sliding frame has a straight slot through which the fastening bolt moves.

[0016] In some embodiments, the detection element includes an electric actuator mounted on a curved rod, a positioning plate at the end of the electric actuator, a pressure sensor that cooperates with the piston rod of a hydraulic cylinder mounted on the positioning plate, a rangefinder and an alarm mounted on the positioning plate, the pressure sensor, the rangefinder and the alarm being electrically connected, and a reflector mounted on the curved rod.

[0017] In some embodiments, the oil-absorbing cotton is coated with an oxidizing agent solution.

[0018] The present invention has at least the following beneficial effects:

[0019] 1. Integrated testing improves efficiency: By setting up oil leakage detection unit and stroke detection unit, the sealing performance and working stroke of the hydraulic cylinder are tested, avoiding the cumbersome process of traditional step-by-step operation and significantly improving the testing efficiency. It is especially suitable for the rapid testing of batch hydraulic cylinders.

[0020] 2. Adaptive clamping and sealing for improved detection accuracy: The clamping plate structure driven by a two-way screw, combined with the design of the arc plate, the fitting plate and the oil-absorbing cotton, can fit the oil port of the oil cylinder, ensuring a tight fit and effectively capturing minute leaks, thus improving the accuracy and reliability of oil leak detection.

[0021] 3. Intelligent stroke detection and convenient operation: Through the coordinated action of electric actuator, pressure sensor and rangefinder, the end position of piston rod is automatically identified and the stroke is accurately measured. Combined with the alarm, the detection results are fed back in real time, reducing manual intervention and lowering the difficulty of operation and the risk of misjudgment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Another structural diagram;

[0024] Figure 3 This is a schematic diagram of the overall partial cross-section of the present invention;

[0025] Figure 4 This is an exploded view of part of the stroke detection unit structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the oil leak detection unit structure of the present invention;

[0027] Figure 6 For the present invention Figure 1 Enlarged structural diagram of area A in the middle;

[0028] Figure 7 This is an exploded view of part of the oil leak detection unit structure of the present invention;

[0029] Figure 8 For the present invention Figure 7 Enlarged structural diagram of area B in the middle;

[0030] Figure 9 This is a schematic diagram of the clamping plate structure of the present invention;

[0031] Figure 10 This is an exploded view of the structure of the clamping plate portion of the present invention.

[0032] In the diagram: 1. Testing platform; 2. Hydraulic cylinder bracket; 3. Clamping plate; 31. Arc plate; 32. Adhesive plate; 33. Compensation plate; 34. Oil-absorbing cotton; 35. Upper sealing plate; 4. Oil leakage detection unit; 5. Displacement component; 51. Fixed seat; 52. Two-way lead screw; 53. Drive motor; 54. Guide rod; 6. Mounting bracket; 61. Fixed plate; 62. Limiting plate; 63. Rotating shaft; 64. Connecting bracket; 65. Torsion spring; 66. Fixed gear; 67. Fixed rack; 7. Stroke detection unit; 71. Sliding frame; 72. Bent rod; 8. Locking component; 81. Threaded hole; 82. Fastening bolt; 83. Straight groove; 9. Testing component; 91. Electric actuator; 92. Positioning plate; 93. Pressure sensor; 94. Rangefinder; 95. Alarm; 96. Reflector. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] Please see Figures 1-10 , the present invention provides a technical solution:

[0036] A hydraulic component testing device includes a testing platform 1 and a cylinder bracket 2. The testing platform 1 has a common existing structure and is equipped with an oil pipe connected to the oil port of the cylinder via a quick connector, as well as a hydraulic component (not shown in the figure). The bottom of the cylinder bracket 2 is set on the mesh plate of the testing platform 1, and the top has a V-shaped structure for stable placement of the cylinder. In this design, the cylinder bracket 2 and the double-acting lead screw 52 are arranged vertically, but this is not limited to this design and may also include:

[0037] Multiple clamping plates 3 are respectively disposed on the detection table 1;

[0038] Oil leakage detection unit 4 is set on the detection table 1 and connected to the clamping plate 3. It is used to drive the clamping plate 3 to move towards the oil cylinder and fit the oil port of the oil cylinder.

[0039] The oil leakage detection unit 4 includes two mounting frames 6 that are movably disposed on both sides of the detection platform 1. Multiple clamping plates 3 are disposed on the side of the mounting frame 6 near the oil cylinder. The detection platform 1 is provided with a shifting component 5 for driving the mounting frame 6 to shift and adjust.

[0040] The displacement component 5 includes a fixed base 51 mounted on the detection table 1, a bidirectional lead screw 52 rotatably mounted on the fixed base 51, a drive motor 53 mounted on the fixed base 51, the output end of the drive motor 53 being connected to the bidirectional lead screw 52, ​​a guide rod 54 mounted on the fixed base 51, and a mounting bracket 6 slidably mounted on the guide rod 54, and the mounting bracket 6 being threadedly connected to both sides of the bidirectional lead screw 52.

[0041] The drive motor 53 drives the bidirectional lead screw 52 to rotate, and under the action of the guide rod 54, it drives the mounting brackets 6 on both sides to move synchronously to both sides;

[0042] The clamping plate 3 includes an arc-shaped plate 31 mounted on the mounting bracket 6. A fitting plate 32 is provided on the top of the arc-shaped plate 31. A compensation plate 33 is provided on the end of the arc-shaped plate 31 near the cylinder body of the oil cylinder. Oil-absorbing cotton 34 is provided on the side of the arc-shaped plate 31, the fitting plate 32 and the compensation plate 33 near the oil cylinder via Velcro. The arc-shaped plate 31 and the fitting plate 32 are integrally molded to ensure the fitting effect at the oil port position of the oil cylinder.

[0043] The arc-shaped plate 31 is attached to the outer wall of the cylinder body, and the attachment plate 32 is attached to the oil port of the cylinder. The two adjacent clamping plates 3 can be used together to form a complete clamping structure. When the worker places it properly, the attachment plate 32 can be aligned to achieve slight adjustment of the oil port of the cylinder, which facilitates the connection of the quick connector.

[0044] After the test is completed, if there is no oil stains on the oil-absorbing cotton 34, it can continue to be used. If there are oil stains, it needs to be replaced. When replacing, only the corresponding piece needs to be replaced.

[0045] The top of the bonding plate 32 is provided with an upper sealing plate 35. The height of the upper sealing plate 35 near the center is higher than the height of the side away from the center. Oil-absorbing cotton 34 is provided on the side of the upper sealing plate 35 away from the center. The upper sealing plate 35 is used to protect the oil-absorbing cotton 34 on the bottom bonding plate 32 to prevent hydraulic oil from dripping when the quick connector is removed from the oil port of the oil cylinder, which would affect the detection. The oil-absorbing cotton 34 at this position is replaced automatically according to the oil absorption situation and does not need to be replaced when there is oil.

[0046] Each of the mounting brackets 6 includes a fixing plate 61 threadedly connected to a bidirectional lead screw 52. A limiting plate 62 is provided on the top of the fixing plate 61. A rotating shaft 63 is rotatably mounted on the limiting plate 62. A connecting frame 64 is provided on the rotating shaft 63. The arc-shaped plates 31 on adjacent sides are respectively mounted on the connecting frame 64. A torsion spring 65 is sleeved on the outside of the rotating shaft 63. Both ends of the torsion spring 65 are respectively connected to the connecting frame 64 and the limiting plate 62. A fixed gear 66 is provided on the rotating shaft 63. A fixed rack 67 that cooperates with the fixed gear 66 is provided on the detection table 1.

[0047] During testing, the staff stands on the side of the testing table 1 with the fixed plate 61. After the test is completed, the drive motor 53 controls the bidirectional lead screw 52 to rotate, thereby moving the two mounting brackets 6 (mounting bracket 6 and fixed plate 61) to the sides. Initially, under the action of the torsion spring 65 and the limiting plate 62, the connecting bracket 64 is in a vertical state. With the continuous movement of the fixed plate 61, the fixed gear 66 and the fixed rack 67 mesh. The fixed gear 66 drives the rotating shaft 63 and the connecting bracket 64 to rotate, displaying the oil-absorbing cotton 34 in front of the staff, which is conducive to the staff's observation.

[0048] The stroke detection unit 7 is set on the detection table 1 and is used to detect the working stroke of the hydraulic cylinder when the piston rod of the hydraulic cylinder extends to the end.

[0049] The stroke detection unit 7 includes a sliding frame 71 mounted on a mounting bracket 6 on the side away from the fixed rack 67. A bent rod 72 is slidably disposed inside the sliding frame 71. A locking element 8 is disposed between the sliding frame 71 and the bent rod 72 for locking and positioning the bent rod 72. A detection element 9 is disposed on the bent rod 72 for detecting the stroke of the hydraulic cylinder.

[0050] The bent rod 72 has multiple threaded holes 81 on the side near the sliding frame 71. The locking member 8 includes a fastening bolt 82 that is threadedly connected to the threaded holes 81. The sliding frame 71 has a straight groove 83. The fastening bolt 82 moves through the straight groove 83. The straight groove 83 allows the operator to make minor adjustments based on the initial position of the cylinder piston rod, ensuring accurate positioning of the initial position.

[0051] The detection component 9 includes an electric actuator 91 mounted on a bent rod 72. A positioning plate 92 is located at the end of the electric actuator 91. A pressure sensor 93, which cooperates with the piston rod of a hydraulic cylinder, is mounted on the positioning plate 92. A rangefinder 94 and an alarm 95 are also mounted on the positioning plate 92. The pressure sensor 93, rangefinder 94, and alarm 95 are electrically connected. A reflector 96 is mounted on the bent rod 72. A control terminal is mounted on the positioning plate 92 and is connected to the electric actuator 91, pressure sensor 93, rangefinder 94, and alarm 95 (not shown in the figure). The alarm 95 contains two different sounds, one for passing and one for failing.

[0052] Extend the piston rod of the hydraulic cylinder to its maximum length to begin testing. Activate the electric actuator 91 to retract the positioning plate 92. Once the pressure sensor 93 contacts the piston rod of the hydraulic cylinder and detects a certain pressure, the electric actuator 91 stops working, and the rangefinder 94 begins testing. After the measurement is completed, the data is transmitted to the control terminal. When the data is qualified, the alarm 95 emits a qualified sound; otherwise, it emits an unqualified sound. After the test is completed, the electric actuator 91 resets.

[0053] During use and testing, the operator stands on the side of the testing table 1 where the fixing plate 61 is located:

[0054] The operator places the hydraulic cylinder in a suitable position on the hydraulic cylinder bracket 2 and adjusts the fastening bolt 82 so that the reflector 96 on the bent rod 72 is in the initial position of the hydraulic cylinder piston rod. The drive motor 53 starts to work and drives the bidirectional lead screw 52 to rotate. Under the action of the guide rod 54, the mounting brackets 6 on both sides (mounting bracket 6 and fixing plate 61) move inward synchronously until they are in contact with the hydraulic cylinder and then stop. Then, the quick connector is connected and the test can begin.

[0055] After the test is completed, the drive motor 53 controls the bidirectional lead screw 52 to rotate, thereby moving the two mounting brackets 6 (mounting bracket 6 and fixing plate 61) to both sides. Initially, under the action of the torsion spring 65 and the limiting plate 62, the connecting bracket 64 is in a vertical state. Under the continuous movement of the fixing plate 61, the fixing gear 66 and the fixing rack 67 mesh, and the fixing gear 66 drives the rotating shaft 63 and the connecting bracket 64 to rotate, displaying the oil-absorbing cotton 34 in front of the staff, which is conducive to the staff's observation.

[0056] Extend the piston rod of the hydraulic cylinder to its maximum length to begin testing. Start the electric actuator 91 to retract the positioning plate 92. After the pressure sensor 93 contacts the piston rod of the hydraulic cylinder and detects a certain pressure, the electric actuator 91 stops working, and the rangefinder 94 begins testing. After the measurement is completed, the data is transmitted to the control terminal. When the data is qualified, the alarm 95 emits a qualified sound; otherwise, the alarm 95 emits an unqualified sound. After the test is completed, the electric actuator 91 resets, and the drive motor 53 rotates in the opposite direction to drive the clamping plate 3 to reset.

[0057] Example 2

[0058] Please see Figures 1-10 , the present invention provides a technical solution:

[0059] Unlike Example 1, the oil-absorbing cotton 34 is soaked with an oxidizing agent solution. In this scheme, the oxidizing agent solution can be a potassium permanganate solution, which can produce some obvious changes and is easy for staff to observe, but it is not limited to potassium permanganate solution.

[0060] When the solution is a potassium permanganate solution, it will produce color changes when it reacts with certain components in the hydraulic oil (such as unsaturated hydrocarbons). These color changes include the deepening of the solution color, the appearance of new color precipitates, or stratification.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A hydraulic component testing device, comprising a testing platform (1) and a cylinder support (2), characterized in that: It also includes: Multiple clamping plates (3) are respectively disposed on the testing table (1); Oil leakage detection unit (4), the oil leakage detection unit (4) is set on the detection table (1) and connected to the clamping plate (3), used to drive the clamping plate (3) to move towards the oil cylinder and fit the oil port of the oil cylinder; A stroke detection unit (7) is installed on a testing platform (1) to detect the working stroke of the hydraulic cylinder when the piston rod of the hydraulic cylinder extends to the end. The oil leakage detection unit (4) includes two mounting brackets (6) that are movably installed on both sides of the testing platform (1). Multiple clamping plates (3) are respectively installed on the mounting brackets (6) near the hydraulic cylinder. A shifting component (5) is installed on the testing platform (1) to drive the mounting brackets (6) to shift and adjust. The shifting component (5) includes a fixed seat (51) installed on the testing platform (1). A bidirectional lead screw (52) is rotatably installed on the fixed seat (51). A drive motor (53) is provided on the upper part of the mounting bracket (51). The output end of the drive motor (53) is connected to a two-way lead screw (52). A guide rod (54) is provided on the fixed base (51). The mounting bracket (6) is slidably sleeved on the guide rod (54) and the mounting bracket (6) is threaded to both sides of the two-way lead screw (52). The clamping plate (3) includes an arc-shaped plate (31) provided on the mounting bracket (6). A fitting plate (32) is provided on the top of the arc-shaped plate (31). A compensation plate (33) is provided on the end of the arc-shaped plate (31) near the cylinder body of the oil cylinder. The arc-shaped plate (31), the fitting plate (32) and the compensation plate (33) are close to the oil cylinder. Oil-absorbing cotton (34) is attached to one side via Velcro. Each mounting bracket (6) includes a fixing plate (61) threaded onto a bidirectional lead screw (52). A limiting plate (62) is provided on the top of the fixing plate (61). A rotating shaft (63) is rotatably mounted on the limiting plate (62). A connecting bracket (64) is provided on the rotating shaft (63). The arc-shaped plates (31) on adjacent sides are respectively mounted on the connecting bracket (64). A torsion spring (65) is sleeved on the outside of the rotating shaft (63). Both ends of the torsion spring (65) are respectively connected to the connecting bracket (64) and the limiting plate (62). A fixing bracket is provided on the rotating shaft (63). The gear (66) is provided on the testing table (1) and a fixed rack (67) is used in conjunction with the fixed gear (66). After the test is completed, the drive motor (53) controls the bidirectional lead screw (52) to rotate, thereby moving the two mounting brackets (6) to the sides. Initially, under the action of the torsion spring (65) and the limiting plate (62), the connecting bracket (64) is in a vertical state. Under the continuous movement of the fixed plate (61), the fixed gear (66) and the fixed rack (67) mesh. The fixed gear (66) drives the rotating shaft (63) and the connecting bracket (64) to rotate, displaying the oil-absorbing cotton (34) in front of the staff, which is conducive to the staff's observation.

2. The hydraulic component testing device according to claim 1, characterized in that: The top of the bonding plate (32) is provided with an upper sealing plate (35). The height of the upper sealing plate (35) near the center is higher than the height of the side away from the center, and the side of the upper sealing plate (35) away from the center is also provided with oil-absorbing cotton (34).

3. The hydraulic component testing device according to claim 2, characterized in that: The stroke detection unit (7) includes a sliding frame (71) on a mounting bracket (6) on the side away from the fixed rack (67). A bent rod (72) is slidably arranged inside the sliding frame (71). A locking element (8) is provided between the sliding frame (71) and the bent rod (72) for locking and positioning the bent rod (72). A detection element (9) is provided on the bent rod (72) for detecting the stroke of the hydraulic cylinder.

4. The hydraulic component testing device according to claim 3, characterized in that: The bent rod (72) has multiple threaded holes (81) on the side near the sliding frame (71). The locking member (8) includes a fastening bolt (82) that is threadedly connected to the threaded holes (81). The sliding frame (71) has a straight slot (83) and the fastening bolt (82) moves through the straight slot (83).

5. The hydraulic component testing device according to claim 4, characterized in that: The detection component (9) includes an electric actuator (91) mounted on a bent rod (72). A positioning plate (92) is provided at the end of the electric actuator (91). A pressure sensor (93) that cooperates with the piston rod of the oil cylinder is provided on the positioning plate (92). A rangefinder (94) and an alarm (95) are provided on the positioning plate (92). The pressure sensor (93), the rangefinder (94) and the alarm (95) are electrically connected. A reflector (96) is provided on the bent rod (72).

6. The hydraulic component testing device according to claim 5, characterized in that: The oil-absorbing cotton (34) is coated with an oxidizing agent solution.

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