Multi-stage hydraulic cylinder thrust detection device

Abstract

The utility model relates to multistage hydraulic cylinder detection technical field, and disclose multistage hydraulic cylinder thrust detection device, including frame, the bottom inner wall of frame is fixedly connected with the linear guide rail that extends to both sides, the linear guide rail is slidably connected with the bearing car for placing the test multistage hydraulic cylinder, the top inner wall of frame is equipped with the top frame, the top inner wall of frame and the pressure sensor of the position above top frame position are fixedly connected with bolt, the bottom inner wall of frame is opened and is equipped with the through position hole of avoiding, this utility model is through with bearing car, linear guide rail, jacking oil cylinder and pressure sensor integration in a rigid frame, constitutes a complete test system, the measured hydraulic cylinder is placed on the movable bearing car, can be easily moved into and moves out test station, compared with the mode that the large hydraulic cylinder is fixedly installed on the traditional counterforce frame, greatly facilitates the unloading of workpiece, improves the efficiency of continuous test.

Description

Technical Field

[0001] This utility model relates to the field of multi-stage hydraulic cylinder testing technology, and more specifically to a multi-stage hydraulic cylinder thrust testing device. Background Technology

[0002] As the core actuator that converts hydraulic energy into mechanical linear motion, the performance and reliability of hydraulic cylinders are directly related to the working capacity and safety of the entire hydraulic system and even the host equipment. Thrust is one of the most critical technical parameters for measuring the performance of hydraulic cylinders. For multi-stage hydraulic cylinders with more complex structures, due to their characteristic of multiple sleeves extending in sequence, they can achieve long strokes within a limited installation space and are widely used in dump trucks, cranes, waste disposal equipment and other fields.

[0003] A search revealed a Chinese patent with publication number CN220168286U, which discloses a hydraulic cylinder thrust measuring mechanism. This device can measure the thrust of a hydraulic cylinder under different temperature conditions, making the measured thrust more accurate. This allows the thrust to be adjusted according to different temperatures during use. However, the device has a small internal space, making it difficult to install and disassemble the multi-stage hydraulic cylinders being tested, and continuous testing is not possible, resulting in low efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-stage hydraulic cylinder thrust detection device to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a multi-stage hydraulic cylinder thrust detection device, including a frame, a linear guide rail extending to both sides is fixedly connected to the bottom inner wall of the frame, a carrier for placing the multi-stage hydraulic cylinder for testing is slidably mounted on the linear guide rail, a top frame is provided through the top inner wall of the frame, a pressure sensor is fixedly connected to the top inner wall of the frame above the top frame, a through clearance hole is opened on the bottom inner wall of the frame, a cross-shaped frame is fixedly connected to the bottom of the frame, and a hydraulic cylinder is fixedly connected to the upper surface of the cross-shaped frame below the clearance hole.

[0006] As a further embodiment of this utility model, a connecting shaft is rotatably connected between two support legs on one side of the carrier via a bearing seat. The connecting shaft passes through the two support legs and is connected to a roller. Two inclined plates are fixedly connected to one side of the carrier. The connecting shaft passes through the two inclined plates and is rotatably connected to the inclined plates via a bearing. A main shaft is rotatably connected between the two inclined plates via a bearing seat. Pulleys are fixedly connected to the outer circumference of the main shaft and the connecting shaft, and the two pulleys are connected by a belt drive. A drive motor that causes the main shaft to rotate axially is fixedly connected to one side of one of the inclined plates.

[0007] As a further embodiment of this utility model, the upper surface of the carrier is provided with screw holes arranged in a square array, and a positioning frame is fixedly connected to the upper surface of the carrier through four screw holes, and the four positioning frames form a cylindrical cavity.

[0008] As a further embodiment of this utility model, a slide is slidably connected to the bottom of the frame, the piston end of the oil cylinder is fixed to the top inner wall of the slide, positioning blocks are fixedly connected to the four corners of the upper surface of the slide, and positioning holes that cooperate with the positioning blocks are opened at the four corners of the lower surface of the carrier.

[0009] As a further embodiment of this utility model, a base is fixedly connected to the bottom inner wall of the frame and located on one side of the two linear guide rails. A slotted photoelectric sensor is fixedly connected to the upper surface of the base, and a cover plate that works in conjunction with the slotted photoelectric sensor is fixedly connected to one side of the carrier vehicle.

[0010] As a further embodiment of this utility model, multiple support frames are fixedly connected to the bottom of the two linear guide rails, and the bottom ends of the multiple support frames are flush with the bottom end of the frame.

[0011] As a further embodiment of this utility model, a spherical pad is provided between the top frame and the sensing end of the pressure sensor. The upper and lower surfaces of the spherical pad are complementary spherical structures, and a spherical groove matching the lower part of the spherical pad is provided at the top center of the top frame.

[0012] As a further embodiment of this invention, the slotted photoelectric sensor, the hydraulic cylinder, and the drive motor are electrically connected.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model integrates a carrier, linear guide rail, lifting cylinder and pressure sensor into a rigid frame to form a complete testing system. The hydraulic cylinder under test is placed on a movable carrier and can be easily moved into and out of the testing station. Compared with the method of fixing large hydraulic cylinders on traditional reaction frames, it greatly facilitates the loading and unloading of workpieces and improves the efficiency of continuous testing.

[0015] 2. This utility model forms an adjustable "cylindrical cavity" limiting structure by using a matrix of screw holes on the upper surface of the carrier and a positioning frame that can be flexibly installed and adjusted. The installation position of the positioning frame can be quickly adjusted according to the multi-stage hydraulic cylinders of different models and sizes, so that the device can adapt to the testing needs of various product specifications and improve the utilization rate and versatility of the equipment.

[0016] 3. This utility model uses a drive motor and pulleys to drive the carrier vehicle to move, and uses a slotted photoelectric sensor and a shield to provide position feedback, which realizes the precise movement and stopping of the carrier vehicle. This not only reduces the labor intensity of operators and improves positioning efficiency, but also lays the foundation for the automated integration of the entire testing process. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention.

[0018] Figure 2 This is a framework diagram of the present invention.

[0019] Figure 3 This utility model Figure 2 Exploded view.

[0020] Figure 4 This is a surface structure diagram of the carrier vehicle of this utility model.

[0021] Figure 5 This is a diagram of the bottom structure of the carrier vehicle of this utility model.

[0022] The attached diagram is labeled as follows: 1. Frame; 2. Linear guide rail; 3. Support frame; 4. Carrier; 5. Top frame; 6. Pressure sensor; 7. Slide carriage; 8. Cross-shaped frame; 9. Alternating hole; 10. Hydraulic cylinder; 11. Base; 12. Slotted photoelectric sensor; 13. Cover plate; 14. Inclined plate; 15. Connecting shaft; 16. Main shaft; 17. Pulley; 18. Drive motor; 19. Screw hole; 20. Positioning frame; 21. Positioning block; 22. Positioning hole. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Reference Figures 1-5This utility model provides a multi-stage hydraulic cylinder thrust detection device, including a frame 1. A linear guide rail 2 extending to both sides is fixedly connected to the bottom inner wall of the frame 1 by bolts. A carrier 4 for placing the multi-stage hydraulic cylinder for testing is slidably mounted on the linear guide rail 2. A top frame 5 is provided through the top inner wall of the frame 1. A pressure sensor 6 (pressure sensor 6 model: EVT-12G large range spoke type pressure sensor) is fixedly connected to the top inner wall of the frame 1 above the top frame 5. A through clearance hole 9 is provided on the bottom inner wall of the frame 1. A cross-shaped frame 8 is fixedly connected to the bottom of the frame 1 by bolts. A hydraulic cylinder 10 is fixedly connected to the upper surface of the cross-shaped frame 8 below the clearance hole 9 by bolts.

[0025] It should be noted that the hydraulic cylinder 10 is an actuator in the hydraulic system. It achieves the telescopic function by cooperating with the hydraulic system. Furthermore, by cooperating with a magnetic switch, proximity switch, or photoelectric switch, it achieves precise control of the telescopic displacement of the piston rod of the hydraulic cylinder 10. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0026] After the carrier vehicle 4 is positioned, the lower oil cylinder 10 is activated, and the carrier vehicle 4 pushes the tested multi-stage hydraulic cylinder upward. The top of the tested hydraulic cylinder eventually contacts the top frame 5 that passes through the top of the frame 1.

[0027] During the test, the multi-stage hydraulic cylinder under test is started. The total thrust output by the multi-stage hydraulic cylinder under test is sensed in real time by the pressure sensor 6 through the top frame 5 and the spherical pad. After the test, the multi-stage hydraulic cylinder under test is stopped, the cylinder 10 retracts, driving the slide 7 and the carrier 4 to descend and reset. The drive motor 18 starts to move the carrier 4 out, completing a complete test cycle.

[0028] By integrating the carrier 4, linear guide 2, lifting cylinder 10 and pressure sensor 6 into a rigid frame 1, a complete testing system is formed. The hydraulic cylinder under test is placed on the movable carrier 4, which can be easily moved into and out of the testing station. Compared with the method of fixing large hydraulic cylinders on the traditional reaction frame, it greatly facilitates the loading and unloading of workpieces and improves the efficiency of continuous testing.

[0029] To further enable the carrier 4 to move along the linear guide rail 2, a connecting shaft 15 is rotatably connected between two support legs on one side of the carrier 4 via bearing seats. The connecting shaft 15 passes through the two support legs and is connected to the rollers. Two inclined plates 14 are fixedly connected to one side of the carrier 4 by bolts. The connecting shaft 15 passes through the two inclined plates 14 and is rotatably connected to the inclined plates 14 via bearings. A main shaft 16 is rotatably connected between the two inclined plates 14 via bearing seats. Pulleys 17 are fixedly connected to the outer circumference of the main shaft 16 and the connecting shaft 15 by bolts, and the two pulleys 17 are connected by belt drive. A drive motor 18 that causes the main shaft 16 to rotate axially is fixedly connected to one side of one of the inclined plates 14 by bolts.

[0030] It should be noted that the drive motor 18 is existing technology, which is a servo motor with an encoder. The number of rotations and rotation angle of the motor output shaft are controllable and have high precision. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0031] After the multi-stage hydraulic cylinder under test is placed, the drive motor 18 is started. The motor output shaft drives the main shaft 16 to rotate. Through the transmission of pulley 17 and belt, the power is transmitted to the connecting shaft 15, which finally drives the rollers at the bottom of the carrier 4 to move along the linear guide rail 2.

[0032] To facilitate the limiting of the test piece, the upper surface of the carrier 4 is provided with screw holes 19 arranged in a square array. The upper surface of the carrier 4 is fixedly connected to the positioning frame 20 through four screw holes 19, and the four positioning frames 20 form a cylindrical cavity.

[0033] In use, the multi-stage hydraulic cylinder to be tested is placed on the carrier 4 and connected to the external oil pipe, and the cylindrical cavity formed by the four positioning frames 20 above it is used for initial positioning and fixation.

[0034] The matrix-style screw holes 19 on the upper surface of the carrier 4 and the flexibly installable and adjustable positioning frame 20 form an adjustable "cylindrical cavity" limiting structure. The installation position of the positioning frame 20 can be quickly adjusted according to the multi-stage hydraulic cylinders of different models and sizes, so that the device can adapt to the testing needs of various product specifications and improve the utilization rate and versatility of the equipment.

[0035] In this utility model, a slide 7 is slidably connected to the bottom of the frame 1, the piston end of the oil cylinder 10 is fixed to the top inner wall of the slide 7, and positioning blocks 21 are fixedly connected to the four corners of the upper surface of the slide 7 by bolts. Positioning holes 22 that cooperate with the positioning blocks 21 are opened at the four corners of the lower surface of the carrier 4.

[0036] When in use, the piston rod of the hydraulic cylinder 10 pushes upward, pushing the slide 7 to rise together. The four positioning blocks 21 on the top surface of the slide 7 rise accordingly and are precisely inserted into the four positioning holes 22 at the bottom of the carrier 4.

[0037] This ensures that when a huge thrust is applied, the carrier 4, the carriage 7, and the cylinder 10 are tightly interlocked as a whole, preventing any lateral movement or overturning and guaranteeing the vertical transmission of force.

[0038] Furthermore, a base 11 is bolted to the bottom inner wall of the frame 1 and located on one side of the two linear guide rails 2. A slotted photoelectric sensor 12 (model of slotted photoelectric sensor 12 is E3S-GS15N inductive switch) is bolted to the upper surface of the base 11. A cover plate 13 for use with the slotted photoelectric sensor 12 is bolted to one side of the carrier vehicle 4.

[0039] When the carrier 4 moves, the cover plate 13 fixed on one side of it will move accordingly. When the cover plate 13 enters the groove of the slotted photoelectric sensor 12 fixed on the base 11, the sensor will send a signal to drive the motor 18 to stop running, so that the carrier 4 stops precisely above the oil cylinder 10.

[0040] The carrier vehicle 4 is moved by a drive motor 18 and pulleys 17, and the position feedback is provided by a slotted photoelectric sensor 12 and a shield 13. This enables the precise movement and stopping of the carrier vehicle 4, which not only reduces the labor intensity of the operators and improves the positioning efficiency, but also lays the foundation for the automated integration of the entire testing process.

[0041] In this utility model, the bottom of the two linear guide rails 2 is fixedly connected to multiple support frames 3 by bolts, and the bottom ends of the multiple support frames 3 are flush with the bottom end of the frame 1.

[0042] In this invention, a spherical pad is provided between the top frame 5 and the sensing end of the pressure sensor 6. The upper and lower surfaces of the spherical pad are complementary spherical structures, and a spherical groove matching the lower part of the spherical pad is provided at the top center of the top frame 5.

[0043] In this invention, the slotted photoelectric sensor 12, the hydraulic cylinder 10, and the drive motor 18 are electrically connected.

[0044] The use of this utility model involves the following steps:

[0045] S1: First, the multi-stage hydraulic cylinder to be tested is placed on the carrier 4 and connected to the external oil pipe. The cylindrical cavity formed by the four positioning frames 20 on top of it is used for initial positioning and fixation. Then, the drive motor 18 is started. The motor output shaft drives the main shaft 16 to rotate. Through the transmission of the pulley 17 and belt, the power is transmitted to the connecting shaft 15, which finally drives the rollers at the bottom of the carrier 4 to move along the linear guide rail 2.

[0046] S2: When the carrier 4 moves, the cover plate 13 fixed on one side of it will move accordingly. When the cover plate 13 enters the groove of the slotted photoelectric sensor 12 fixed on the base 11, the sensor will send a signal to drive the motor 18 to stop running, so that the carrier 4 stops precisely above the oil cylinder 10.

[0047] S3: After the carrier vehicle 4 is positioned, the lower oil cylinder 10 is activated, and the carrier vehicle 4 pushes the tested multi-stage hydraulic cylinder to move upward. The top of the tested hydraulic cylinder finally contacts the top frame 5 that passes through the top of the frame 1.

[0048] S4: During the test, the multi-stage hydraulic cylinder under test is started. The total thrust output by the multi-stage hydraulic cylinder under test is sensed in real time by the pressure sensor 6 through the top frame 5 and the spherical pad. After the test, the multi-stage hydraulic cylinder under test is stopped, the cylinder 10 retracts, driving the slide 7 and the carrier 4 to descend and reset. The drive motor 18 starts to move the carrier 4 out, completing a complete test cycle.

[0049] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0050] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0051] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A multi-stage hydraulic cylinder thrust detection device, comprising a frame (1), characterized in that: The bottom inner wall of the frame (1) is fixedly connected to a linear guide rail (2) extending to both sides. A carrier (4) for placing the test multi-stage hydraulic cylinder is slidably mounted on the linear guide rail (2). A top frame (5) is provided on the top inner wall of the frame (1). A pressure sensor (6) is fixedly connected to the top inner wall of the frame (1) above the top frame (5). A through clearance hole (9) is provided on the bottom inner wall of the frame (1). A cross-shaped frame (8) is fixedly connected to the bottom of the frame (1). A hydraulic cylinder (10) is fixedly connected to the upper surface of the cross-shaped frame (8) below the clearance hole (9).

2. The multi-stage hydraulic cylinder thrust detection device according to claim 1, characterized in that: A connecting shaft (15) is rotatably connected between two legs on one side of the carrier (4) via a bearing seat. The connecting shaft (15) passes through the two legs and is connected to a roller. Two inclined plates (14) are fixedly connected to one side of the carrier (4). The connecting shaft (15) passes through the two inclined plates (14) and is rotatably connected to the inclined plates (14) via a bearing. A main shaft (16) is rotatably connected between the two inclined plates (14) via a bearing seat. Pulleys (17) are fixedly connected to the outer circumference of both the main shaft (16) and the connecting shaft (15), and the two pulleys (17) are connected by a belt drive. A drive motor (18) that causes the main shaft (16) to rotate axially is fixedly connected to one side of one of the inclined plates (14).

3. The multi-stage hydraulic cylinder thrust detection device according to claim 1, characterized in that: The upper surface of the carrier (4) is provided with screw holes (19) arranged in a square array. The upper surface of the carrier (4) is fixedly connected to a positioning frame (20) through four screw holes (19), and the four positioning frames (20) form a cylindrical cavity.

4. The multi-stage hydraulic cylinder thrust detection device according to claim 1, characterized in that: The bottom of the frame (1) is connected to a slide (7) through which a slide (7) is slidably connected. The piston end of the oil cylinder (10) is fixed to the top inner wall of the slide (7). Positioning blocks (21) are fixedly connected at the four corners of the upper surface of the slide (7). Positioning holes (22) that cooperate with the positioning blocks (21) are opened at the four corners of the lower surface of the carrier (4).

5. The multi-stage hydraulic cylinder thrust detection device according to claim 4, characterized in that: A base (11) is fixedly connected to the bottom inner wall of the frame (1) and to one side of the two linear guide rails (2). A slotted photoelectric sensor (12) is fixedly connected to the upper surface of the base (11). A cover plate (13) that works in conjunction with the slotted photoelectric sensor (12) is fixedly connected to one side of the carrier vehicle (4).

6. The multi-stage hydraulic cylinder thrust detection device according to claim 1, characterized in that: The bottom of the two linear guide rails (2) is fixedly connected to multiple support frames (3), and the bottom ends of the multiple support frames (3) are flush with the bottom end of the frame (1).

7. The multi-stage hydraulic cylinder thrust detection device according to claim 1, characterized in that: A spherical pad is provided between the top frame (5) and the sensing end of the pressure sensor (6). The upper and lower surfaces of the spherical pad are complementary spherical structures. A spherical groove matching the lower part of the spherical pad is provided at the top center of the top frame (5).

8. The multi-stage hydraulic cylinder thrust detection device according to claim 5, characterized in that: The slotted photoelectric sensor (12), the oil cylinder (10), and the drive motor (18) are electrically connected.

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