Test bench capable of realizing rapid model change of oil pumps of multiple models

Abstract

The invention relates to the technical field of oil pump testing, in particular to a testboard capable of achieving rapid model changing of multi-model oil pumps. Comprising a main body and a testing unit, the testing unit is located in a shell of the main body, and the testing unit comprises a sliding seat, a clamp, a lifting assembly and a switching assembly; the sliding seat is connected to a guide rail plate of the main body in a sliding mode and connected with a first driving source of the main body, the lifting assembly is located between the clamps and connected with the guide rail plate in a sliding mode, the switching assembly is connected to the guide rail plate in a sliding mode and connected with a second driving source of the main body, and one end of the bent rod is arranged on the lifting assembly in a sleeving mode. And the other end is screwed with the switching assembly. By arranging the bent rod linked with the lifting assembly, height adjustment of the oil pump is mechanically associated with rotation selection of the pipeline switching disc. Connection and cooperation of height adjustment, valve selection, clamping and buckling are achieved, and the links of manual step-by-step operation and judgment are reduced.

Description

Technical Field

[0001] This invention belongs to the field of oil pump testing technology, specifically relating to a test bench that enables rapid model changeover for multiple oil pump models. Background Technology

[0002] As an essential piece of equipment for oil pump production and maintenance, the purpose of an oil pump test bench is to conduct functional tests before shipment or after maintenance by connecting the oil pump to a test motor, thereby ensuring product quality and performance. Current traditional test benches typically consist of a main body comprised of a housing, a closed cover, guide rails, a mounting base, and a test motor, along with fixtures and piping. These are manually adjusted to test a single or a few specific models.

[0003] The current market offers various models of oil pumps, resulting in variations in pipe interface dimensions and shaft height. This diversity necessitates a series of cumbersome "model changeover" operations when testing different pump models. These operations involve adjusting the shaft of the fixed test motor to accommodate the pump model and replacing pipes of different diameters with the pump inlet for proper fitting. This process suffers from low efficiency, low accuracy, and poor flexibility. To address the issue of testing multiple models, existing technologies employ independent drive mechanisms where operators control the lifting and lowering for shaft alignment, clamping, and replacement / fitting of different diameter pipe interfaces. However, these mechanisms rely heavily on operator judgment for activation and often operate independently, lacking coordination and mechanical linkage. This not only makes the model changeover process cumbersome and time-consuming but also makes it difficult to ensure precise synchronization of critical steps such as shaft alignment, workpiece clamping, and pipe fitting, thus affecting the reliability and consistency of the test. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention provides a test bench for rapid switching between multiple oil pump models. Through the mechanical coordination and linkage design of the lifting assembly, switching assembly, sliding seat, and bent rod, it reduces manual intervention while ensuring coordination of alignment, clamping, and pipeline connection, thereby improving testing efficiency and equipment adaptability. This solves the problems of cumbersome steps, poor coordination, and low efficiency and insufficient accuracy caused by reliance on manual labor in traditional multi-model testing.

[0005] The objective of this invention can be achieved through the following technical solutions: A test bench for rapid model changeover of multiple oil pump models includes a main body, a bent rod, and a test unit. The test unit is located inside the housing of the main body and includes a sliding seat, a clamp, a lifting assembly, and a switching assembly. The sliding seat is slidably connected to the guide rail plate of the main body and connected to a first drive source of the main body. The clamps are respectively disposed on the sliding seat and the guide rail plate. The lifting assembly is located between the clamps and slidably connected to the guide rail plate. The switching assembly is slidably connected to the guide rail plate and connected to a second drive source of the main body. One end of the bent rod is sleeved on the lifting assembly, and the other end is screwed to the switching assembly. The lifting assembly is adjusted based on the oil pump model to align the oil pump with the test motor of the main body; the bent rod drives the switching assembly to rotate based on the lifting displacement of the lifting assembly; after pipeline matching is completed, the first drive source pushes the sliding seat to move horizontally, the clamp is clamped, and the second power source drives the switching assembly to slide vertically to complete the engagement.

[0006] As a further embodiment of the present invention, the lifting assembly includes a moving platform, a lifting hydraulic cylinder, and a placement platform; the moving platform is horizontally slidably connected to the guide rail plate, the rod head of the pull rod is larger than the rod body, the rod body of the pull rod is slidably connected to the moving platform and connected to the sliding seat, the bottom of the lifting hydraulic cylinder is located on the moving platform, the placement platform is located on the top of the lifting hydraulic cylinder, and the upper surface of the placement platform is provided with a stepped groove.

[0007] As a further embodiment of the present invention, the lifting assembly further includes a positioning component, which includes a laser emitter and a laser marking plate. The laser emitter is disposed on one side of the placement platform, and the laser marking plate is disposed on one side of the sliding seat. The laser emitter and the laser marking plate are arranged opposite to each other.

[0008] As a further embodiment of the present invention, the switching assembly includes a lifting seat, a support spring, a switching disc, a diverter pipe, a compression plate, a compression spring, and a locking valve; the lifting seat is vertically slidably connected to the guide rail plate, the support spring is disposed between the guide rail plate and the lifting seat, the switching disc is rotatably disposed on the lifting seat, the diverter pipe is disposed outside the switching disc, the switching disc has a communicating cavity inside, the two ends of the communicating cavity are respectively connected to an external connector and the diverter pipe, the compression plate is slidably connected to the diverter pipe, the compression spring is disposed between the compression plate and the diverter pipe, and the locking valve is detachably snapped into the diverter pipe.

[0009] As a further embodiment of the present invention, a clamping and fastening assembly is also included, the clamping and fastening assembly including a pressing rod, a wedge plate and a pressing spring, the pressing rod being slidably connected to the sliding seat through the rod, one end being connected to a first power source and the other end being provided with the wedge plate, and the pressing spring being disposed between the pressing rod and the sliding seat.

[0010] As a further embodiment of the present invention, the testing unit further includes a monitoring system, which includes a first pressure sensor, a torsion spring, an execution module, and a summarizing module; the first pressure sensor is disposed on the lifting seat of the switching assembly and electrically connected to the execution module; the torsion spring is disposed between the first pressure sensor and the switching disk; the summarizing module is electrically connected to the first pressure sensor; the first pressure sensor monitors the rotation amplitude of the switching disk by detecting the deformation and compressive force of the torsion spring, and compares it with preset model parameters; if the rotation amplitude does not meet the standard, the execution module cuts off the power supply of the first drive source.

[0011] As a further embodiment of the present invention, the monitoring system further includes a second pressure sensor, which is sleeved on the lifting seat and abuts against the support spring, for monitoring the compression of the support spring to determine whether the engagement degree is qualified; the second pressure sensor is electrically connected to the summarizing module.

[0012] As a further embodiment of the present invention, the summarization module is configured to receive and process the signals from the first pressure sensor and the second pressure sensor, and output one of the following instructions: a qualified instruction, generated when the rotation amplitude meets the standard and the engagement degree is qualified; a unqualified instruction, generated when the rotation amplitude does not meet the standard and the engagement degree is unqualified; and a partially qualified instruction, generated when only one of the rotation amplitude and the engagement degree meets the standard.

[0013] As a further aspect of the present invention, the partial qualification instruction includes a first status light and a second status light; the first status light is used to indicate an abnormal rotation alignment, and the second status light is used to indicate insufficient fastening.

[0014] The beneficial effects of this invention are as follows: 1. This invention mechanically links the height adjustment of the oil pump with the rotation selection of the pipeline switching disc by setting a curved rod linked to the lifting assembly. When the lifting assembly adjusts its height according to the oil pump model to achieve alignment with the axis of the test motor, the lifting motion of the curved rod is synchronously converted into the precise rotation of the switching disc, thereby automatically switching the corresponding model of the locking valve to the docking position. Subsequently, the first drive source pushes the sliding seat and clamp to complete the clamping and fixing of the oil pump, and the second drive source drives the switching assembly to move down to achieve pipeline locking. This achieves the connection and coordination of "height adjustment-valve selection-clamping-locking", reducing the manual step-by-step operation and judgment, effectively solving the problems of cumbersome process and poor coordination caused by the independent operation of each mechanism in traditional test benches, improving the efficiency of type change testing and the adaptability of testing and conversion of different model oil pumps.

[0015] 2. By adding a monitoring system comprising a first pressure sensor, a torsion spring, and a second pressure sensor, a closed-loop monitoring system for key parameters of the coordinated linkage process was constructed. The first pressure sensor detects the deformation of the torsion spring and provides real-time feedback on the rotation angle of the switching disc, ensuring the accuracy of the linkage between the oil pump height adjustment and the valve model selection. The second pressure sensor monitors the compression of the support spring to accurately determine whether the locking force between the locking valve and the oil pump inlet meets the standard. The summary module comprehensively processes the two signals, outputting qualified, unqualified, or partially qualified commands, and visually indicating the fault type (such as misalignment or insufficient locking) through status lights. It can verify the accuracy of actions in real time during the linkage process, preventing docking errors or sealing failures caused by mechanical deviations. It can also automatically interrupt the process and issue warnings in case of abnormalities, enhancing the controllability, reliability, and safety of the testing process, and realizing a closed-loop quality monitoring system from operation to verification. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a front view of the test bench of the present invention; Figure 2 This is a top view of the test bench of the present invention; Figure 3 This is a schematic diagram of the first three-dimensional structure of the test unit of the present invention; Figure 4 This is a schematic diagram of the second three-dimensional structure of the test unit of the present invention; Figure 5 This is a partial three-dimensional structural schematic diagram of the test unit of the present invention; Figure 6 This is a schematic diagram of the disassembled three-dimensional structure of the present invention; Figure 7 This is a partial three-dimensional structural diagram of the switching component of the present invention; Figure 8 This is an example diagram of the monitoring system of the present invention; Figure 9 This is a state diagram for the present invention; Figure 10This is a clamping state diagram of the present invention; Legend: 1. Housing; 2. Closed cover; 3. Test unit; 31. Guide rail plate; 32. Sliding seat; 33. Mounting seat; 34. Test motor; 41. Moving stage; 42. Hydraulic lifting cylinder; 43. Placement stage; 44. Detection oil pump; 45. Laser emitter; 46. Laser marking plate; 51. Lifting seat; 52. Support spring; 53. Switching disc; 54. Diverter pipe; 55. Compression plate; 56. Compression spring; 57. Snap-on valve; 6. Bent rod; 71. Passive clamp; 72. Active clamp; 81. Extrusion rod; 82. Wedge plate; 83. Extrusion spring; 84. Pull rod; 91. First pressure sensor; 92. Torsion spring; 93. Execution module; 11. Second pressure sensor; 12. Summary module. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0019] Example 1: While existing technologies employ independent drive mechanisms that separately control lifting, clamping, and pipe switching / connection, these mechanisms typically operate independently, relying on operators to perform step-by-step maneuvers and judgments. This lack of automatic coordination and mechanical linkage between actions not only makes changeover processes cumbersome and time-consuming but also makes it difficult to ensure precise synchronization of critical steps such as axis alignment, workpiece clamping, and pipe connection, thus affecting the reliability and consistency of testing.

[0020] In this regard, refer to Figures 1-10 As shown, this invention provides a test bench for rapid changeover of multiple oil pump models. Through the mechanical coordination and linkage of the lifting assembly, switching assembly, sliding seat 32, and bent rod 6, manual intervention is reduced while ensuring coordination of alignment, clamping, and pipeline connection. This improves testing efficiency and equipment adaptability, solving the problems of cumbersome procedures, poor coordination, and low efficiency and insufficient accuracy caused by reliance on manual labor in traditional multi-model testing. The test bench for rapid changeover of multiple oil pump models includes a main body and a testing unit 3, wherein the main body includes a housing 1, a closing cover 2, and... The test unit 34 consists of a guide rail plate 31, a mounting base 33, a test motor 34, and a test oil pump 44. The closed cover 2 is located above the test unit 3 and hinged to the housing 1. The housing 1 has a guide rail plate 31 inside, which serves as a clamping platform. The test motor 34 is fixed to the mounting base 33, and the mounting base 33 is fixed to one end of the guide rail plate 31 to support the test motor 34. The test oil pump 44 is of different models and is located in the lifting assembly. For the connection between the power shaft of the test motor 34 and the output shaft of the test oil pump 44, a half coupling that is disclosed in the prior art and can adapt and maintain transmission is used for connection.

[0021] Test unit 3 is located inside the housing 1 of the main body. Test unit 3 includes a sliding seat 32, a clamp, a lifting assembly, and a switching assembly. The sliding seat 32 is slidably connected to the guide rail plate 31 of the main body and connected to the first drive source of the main body. The clamp is respectively located on the sliding seat 32 and the guide rail plate 31. It should be further noted that the clamp consists of an active clamp 72 and a passive clamp 71. The clamps correspond to the differences of different models of testing oil pumps 44. Each different model of clamp has a uniform fixed insert rod on one side and a positioning shaft corresponding to the different model of testing oil pump 44 on the other side. The lifting assembly is located on the clamp. The switching component slides between and with the guide rail plate 31, and is connected to the second drive source of the main body. One end of the bent rod 6 is sleeved on the lifting component, and the other end is screwed to the switching component. Through the above settings, the lifting component is adjusted according to the model difference of the detection oil pump 44 so that the oil pump and the test motor 34 of the main body are coaxially aligned. The bent rod 6 drives the switching component to rotate based on the lifting displacement of the lifting component. After the pipeline matching is completed, the first drive source pushes the sliding seat 32 to move horizontally, the clamp is clamped, and the second power source drives the switching component to slide vertically to complete the fastening.

[0022] Specifically, the lifting assembly includes a moving platform 41, a lifting hydraulic cylinder, and a placement platform 43. The moving platform 41 is horizontally slidably connected to the guide rail plate 31 to facilitate clamping during subsequent horizontal displacement. The head of the pull rod 84 is larger than the body, and the body of the pull rod 84 is slidably connected to the moving platform 41 and connected to the sliding seat 32. The bottom of the lifting hydraulic cylinder is located on the moving platform 41, and the placement platform 43 is located on top of the lifting hydraulic cylinder. The lifting hydraulic cylinder is in a full oil state and maintains its maximum stroke. The oil pump 44 to be tested is placed on the placement platform 43, and manual testing is performed on the oil pump. The model control lifting hydraulic cylinder 44 releases oil to lower the pump, and the lifting hydraulic cylinder drives the placement platform 43 to move vertically, causing the input shaft of the test oil pump 44 to be coaxially aligned with the output shaft of the test motor 34. The upper surface of the placement platform 43 is provided with a stepped groove. The stepped groove is used to adapt to the differences in the base of the oil pump body with different diameters, ensuring that the oil pump can be automatically centered and aligned when placed. The moving platform 41 works with the sliding seat 32 to achieve horizontal movement, further improving the alignment accuracy and facilitating the subsequent close clamping of the test oil pump 44 and the test motor 34.

[0023] Specifically, the switching assembly includes a lifting seat 51, a support spring 52, a switching disc 53, a diverter pipe 54, a compression plate 55, a compression spring 56, and a latching valve 57. The upper part of the lifting seat 51 has a triangular structure, and the lower part has a vertical extension. The vertical extension is symmetrically slidably connected to the guide rail plate 31. There are two support springs 52, which are respectively located between the guide rail plate 31 and the vertical extension of the lifting seat 51. It should be noted in advance that, in order to ensure the stability of the switching disc 53, the deformation resistance of the support springs 52 is greater than the weight of the lifting seat 51 and its components. Combined with the downward pulling force applied by the bent pipe through the thread of the switching disc 53, the support springs 52 not only provide support for the lifting seat 51, but also provide subsequent compression. The lower part of the switching disc 53 is rotatably sleeved on the lifting seat 51. The upper part of the lowering seat 51 can be rotated and replaced. The upper part of the switching plate 53 is provided with an interface for connecting to an external oil inlet pipe. In addition, in order to meet the convenient use of multiple models of detection oil pumps 44 and reduce unnecessary searching of the locking valve 57, there are several diverter pipes 54 arranged in a ring array on the outside of the switching plate 53. The switching plate 53 has a connecting cavity inside, and the two ends of the connecting cavity are connected to the external connector and the diverter pipe 54 respectively. The compression plate 55 is slidably connected to the diverter pipe 54 on the same axis. The number of compression plates 55 corresponds to the number of diverter pipes 54. The compression spring 56 is located between the compression plate 55 and the diverter pipe 54. The locking valve 57 can be detachably snapped into the diverter pipe 54. It should be noted that the use of several locking valves 57 is all existing technology. The difference is that the oil inlet diameter of different models of detection oil pumps 44 corresponds to different models of locking valves 57.

[0024] Although the placement of the bend in the pipe has been mentioned above, to fully illustrate its importance, please refer to the bend pipe reference. Figure 4 and Figure 6 As shown, the lower part of the bent tube is horizontally slidable to one side of the placement platform 43, and the upper part is located at the center of the upper part of the lifting seat 51 and is provided with a thread. This thread is connected to the threaded groove at the center of the lower part of the switching plate 53. When the placement platform 43 is raised or lowered, it drives the bent tube to rise or fall in the same way. Since the switching plate 53 is stably supported by the lifting seat 51, that is, the switching plate 53 is equivalent to being fixed in place. The raising and lowering displacement of the bent tube drives the switching plate 53 to rotate in place through the thread, thereby completing the rotation switching of the locking valve 57. The bent tube links the height difference of different models of oil pumps with the model change of the locking valve 57 to form a synchronous coordination.

[0025] The working principle of this embodiment is as follows: The model of the oil pump 44 to be tested is manually determined. First, the corresponding model fixture is placed on the slide rail plate and sliding seat 32. Several locking valves 57 are pre-installed on the switching disc 53. Then, the oil pump 44 to be tested is placed on the placement platform 43. The hydraulic lifting cylinder 42 is manually controlled to eliminate the height difference between the different models, ensuring that the shaft of the oil pump 44 to be tested is coaxial with the testing motor. During this process, the bent tube follows the lifting displacement of the placement platform 43 and drives the switching disc 53 to rotate via a threaded drive. The difference in lifting displacement between different models of the oil pump 44 affects the accuracy of the test. To differentiate between different models of locking valve 57, the two are linked together. Then, the first and second power sources in the control unit are matched. After the model differences are matched, the first power source pushes the sliding seat 32 and the active clamp 72 together to push the entire lifting assembly to move horizontally and clamp. The bent tube remains in its original position. The second power source drives the switching component to move downward, moving the corresponding model of locking valve 57 downward and locking it to the oil inlet of the oil pump 44 to be tested. After the test is completed, the operation can be reversed. During the reset process of the sliding seat 32, the lifting assembly is reset by pulling the pull rod 84.

[0026] In another embodiment, a positioning component is further provided on the basis of the lifting assembly. The positioning component is used to determine the lifting displacement of the hydraulic lifting cylinder 42. The positioning component includes a laser emitter 45 and a laser marking plate 46. The laser emitter 45 is located on the side of the placement platform 43 facing the sliding seat 32, and the laser marking plate 46 is fixed to the side of the sliding seat 32 facing the placement platform 43. The laser emitter 45 and the laser marking plate 46 are arranged opposite to each other. Through the above arrangement, the differences in manual operation can be reduced. Combined with the use of laser positioning recognition, the alignment of the shaft center of the detection motor and the oil pump 44 under test can be more accurately verified. In addition, the positioning component... With this feature, the hydraulic lifting cylinder 42, compared to embodiment 1, can also be in a state of not being fully filled with oil. This oil level only supports the maximum weight of the placement platform 43. The detection motor is placed on the placement platform 43. The weight difference of different models of detection motors will cause the lifting hydraulic cylinder and the placement platform 43 to descend in different ways. This will cause the model corresponding position of the laser emitter 45 and the laser marking plate 46 to change. It will also cause the curved tube to rise and fall together to complete the rotation and replacement of the switching disk 53. This method no longer requires manual determination of the model, nor does it require manual judgment and operation of the displacement, avoiding the slight difference in coaxial alignment caused by manual operation.

[0027] In another embodiment, a clamping and engaging assembly is also included on the sliding seat 32. The clamping and engaging assembly includes a pressing rod 81, a wedge plate 82, a pressing spring 83, and a pull rod 84. The pressing rod 81 is horizontally slidably connected to the sliding seat 32, with one end connected to the first power source and the other end provided with the wedge plate 82. The uppermost part of the inclined surface of the wedge rod is at the same level as the protrusion at the lower part of the lifting seat 51. The pressing spring 83 is disposed between the pressing rod 81 and the sliding seat 32. With the above arrangement, when clamping is required, the first power source pushes the pressing rod 81, the pressing spring 83, the sliding seat 32, and the active clamp 72 together to move toward the lifting assembly. During the process, the pressing spring... The first stage of deformation occurs when the active clamp 72 aligns with the detection oil pump 44 and the sliding seat 32 pushes the lifting assembly to complete the clamping. The sliding seat 32 is then limited by the slide rail plate and kept in its original position. The first power source continues to push, and the compression rod 81, compression spring 83, and wedge plate 82 continue to move. At this time, the compression spring 83 undergoes the second stage of deformation, and the inclined surface of the wedge plate 82 compresses the protrusion of the lifting seat 51, causing the lifting seat 51 to move downward to complete the engagement of the locking valve 57 with the oil inlet of the detection oil pump 44. During this process, the lifting seat 51 compresses the support spring 52. This reduces the steps of manual batch operation and automates the clamping and engagement operations by starting the machine once.

[0028] While the above setup can achieve shaft alignment, clamping, and management switching of different models of testing oil pumps 44 through linkage and coordination, the degree of switching and engagement during the process is difficult to observe with the naked eye. Furthermore, minor deviations inevitably occur during long-term mechanical linkage, leading to inaccurate switching and unqualified engagement. Therefore, based on the above embodiments, this embodiment also proposes a monitoring system in test unit 3. The monitoring system includes a first pressure sensor 91, a torsion spring 92, an execution module 93, and a summary module 12. The first pressure sensor 91 is located on the lifting seat 51 and electrically connected to the summary module 12 and the execution module 93. The torsion spring 92 is located between the first pressure sensor 91 and the switching disk 53. The execution module 93 is electrically connected to the first power source. When the switching disk 53 rotates, since the switching disk 53 is stably supported, the torsion spring 92 is not affected by gravity. Therefore, the rotation of the switching disk 53 will cause the torsion spring 92 to... The rotational deformation of the torsion spring 92 compresses the first pressure sensor 91. The first pressure sensor 91 monitors the compressive force in real time. The rotation amplitude of the switching disk 53 corresponds to the compressive force of the torsion spring 92 on the first pressure sensor 91. By establishing a table of rotation amplitude of the switching disk 53 and compressive force of the torsion spring 92 in advance in the monitoring system, and dividing it into different boundaries corresponding to different models of detection oil pumps 44, it is possible to determine whether the rotation amplitude corresponds to the lifting and lowering amount of the detection oil pump 44. If the two are consistent, it means that the locking valve 57 represented by the rotation amplitude is consistent with the detection oil pump 44 of that model. If there is a difference, it means that the locking valve 57 and the detection oil pump 44 will not lock properly during subsequent locking. Therefore, before the detection starts, the system collects the compressive force of the torsion spring 92 in real time through the first pressure sensor 91. If it is found that the rotation amplitude does not meet the preset model parameters, the execution module 93 will immediately cut off the power supply of the first power source and transmit the data to the summary module 12.

[0029] In one embodiment, the monitoring system further includes a second pressure sensor 11, which is fitted onto the lifting seat 51 and abuts against the support spring 52. The second pressure sensor 11 is electrically connected to the aggregation module 12. It transmits the detection information to the aggregation module 12. Furthermore, the second pressure sensor 11 pre-calibrates the weight of the lifting seat 51 and the compressive force generated by the slight deformation when the bent rod 6 is driven to rotate, forming a reference pressure value range. When the wedge plate 82 compresses the lifting seat 51 and moves downward, the second pressure sensor 11 monitors in real time whether the pressure value fed back by the compression of the support spring 52 reaches the threshold required for proper engagement. If the value does not reach the threshold, it indicates that the engagement is unqualified, and there may be a problem with incomplete sealing. The summary module 12 includes qualified instructions, unqualified instructions, and partially qualified instructions. A head-to-tail closed loop is formed by setting the first pressure sensor 91 and the second pressure sensor 11. The first pressure sensor 91 identifies the rotation alignment and shaft alignment. Based on whether it meets the standard or not, it independently starts the first power source to check whether the subsequent clamping operation is performed and simultaneously inputs the data to the summary module 12. The second pressure sensor 11 identifies the engagement degree and performs a final closed-loop verification of the clamping before the change of type. The data is fed back to the summary module 12, and the summary module 12 combines the data from both. The system comprehensively processes information on compliance / non-compliance and pass / fail status, generating a pass command by combining the pass signal from the first pressure sensor 91 with the pass signal from the second pressure sensor 11, and a fail command by combining the non-compliance signal from the first pressure sensor 91 with the non-compliance signal from the second pressure sensor 11. It also generates partial pass commands by combining the pass and non-compliance signals, or the pass and non-compliance signals, from either the first pressure sensor 91 or the second pressure sensor 11. Through this detailed command classification, the system can accurately provide feedback on the matching status between the locking valve 57 and the detection oil pump 44, guiding the execution strategy of subsequent clamping actions. Partial pass commands trigger an early warning mechanism, prompting the operator to intervene. The system undergoes a review process to prevent quality risks caused by misjudgments. All instructions are synchronized to the central control platform, enabling full-process data traceability and closed-loop quality monitoring. Additionally, some qualified instructions include a first status light and a second status light, corresponding to the first pressure sensor 91 and the second pressure sensor 11. A lit first status light indicates abnormal rotation alignment, while a lit second status light indicates insufficient engagement. The dual-light display provides clear feedback on the fault type. Operators can quickly pinpoint the source of the problem based on the light indicators. These features ensure the accuracy and safety of rapid changeovers, effectively preventing the risk of seal failure due to mechanical fatigue or assembly errors.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A test bench for rapid changeover of multiple oil pump models, characterized in that: The device includes a main body, a bent rod, and a testing unit. The testing unit is located inside the housing of the main body and includes a sliding seat, a clamp, a lifting assembly, and a switching assembly. The sliding seat is slidably connected to the guide rail plate of the main body and connected to a first drive source of the main body. The clamps are respectively disposed on the sliding seat and the guide rail plate. The lifting assembly is located between the clamps and slidably connected to the guide rail plate. The switching assembly is slidably connected to the guide rail plate and connected to a second drive source of the main body. One end of the bent rod is sleeved on the lifting assembly, and the other end is screwed to the switching assembly. The lifting assembly is adjusted based on the oil pump model to align the oil pump with the test motor of the main body; the bent rod drives the switching assembly to rotate based on the lifting displacement of the lifting assembly; after pipeline matching is completed, the first drive source pushes the sliding seat to move horizontally, the clamp is clamped, and the second power source drives the switching assembly to slide vertically to complete the engagement.

2. The test bench for rapid changeover of multiple oil pump models as described in claim 1, characterized in that: The lifting assembly includes a moving platform, a lifting hydraulic cylinder, and a placement platform; the moving platform is horizontally slidably connected to the guide rail plate, the rod head of the pull rod is larger than the rod body, the rod body of the pull rod is slidably connected to the moving platform and connected to the sliding seat, the bottom of the lifting hydraulic cylinder is located on the moving platform, the placement platform is located on the top of the lifting hydraulic cylinder, and the upper surface of the placement platform is provided with a stepped groove.

3. The test bench for rapid changeover of multiple oil pump models according to claim 2, characterized in that: The lifting assembly also includes a positioning component, which includes a laser emitter and a laser marking plate. The laser emitter is located on one side of the placement platform, and the laser marking plate is located on one side of the sliding seat. The laser emitter and the laser marking plate are arranged opposite to each other.

4. The test bench for rapid changeover of multiple oil pump models as described in claim 1, characterized in that: The switching assembly includes a lifting seat, a support spring, a switching disc, a diverter pipe, a compression plate, a compression spring, and a locking valve. The lifting seat is vertically slidably connected to the guide rail plate. The support spring is located between the guide rail plate and the lifting seat. The switching disc is rotatably mounted on the lifting seat. The diverter pipe is located outside the switching disc. The switching disc has a communicating cavity inside. The two ends of the communicating cavity are respectively connected to an external connector and the diverter pipe. The compression plate is slidably connected to the diverter pipe. The compression spring is located between the compression plate and the diverter pipe. The locking valve is detachably snapped into the diverter pipe.

5. The test bench for rapid changeover of multiple oil pump models according to claim 2, characterized in that: It also includes a clamping and fastening assembly, which includes a pressing rod, a wedge plate and a pressing spring. The pressing rod slides through the sliding seat, with one end connected to the first power source and the other end provided with the wedge plate. The pressing spring is located between the pressing rod and the sliding seat.

6. The test bench for rapid changeover of multiple oil pump models according to claim 4, characterized in that: The testing unit also includes a monitoring system, which comprises a first pressure sensor, a torsion spring, an execution module, and a summarizing module. The first pressure sensor is mounted on the lifting seat of the switching assembly and is electrically connected to the execution module. The torsion spring is positioned between the first pressure sensor and the switching disk. The summarizing module is electrically connected to the first pressure sensor. The first pressure sensor monitors the rotation amplitude of the switching disk by detecting the deformation and compressive force of the torsion spring and compares it with preset model parameters. If the rotation amplitude does not meet the standard, the execution module cuts off the power supply to the first drive source.

7. The test bench for rapid changeover of multiple oil pump models according to claim 6, characterized in that: The monitoring system also includes a second pressure sensor, which is sleeved on the lifting seat and abuts against the support spring, and is used to monitor the compression of the support spring to determine whether the engagement is qualified; the second pressure sensor is electrically connected to the aggregation module.

8. The test bench for rapid changeover of multiple oil pump models according to claim 7, characterized in that: The aggregation module is configured to receive and process signals from the first pressure sensor and the second pressure sensor, and output one of the following instructions: a qualified instruction, generated when the rotation amplitude and the engagement degree are qualified; a failed instruction, generated when the rotation amplitude and the engagement degree are unqualified; and a partially qualified instruction, generated when only one of the rotation amplitude and the engagement degree is qualified.

9. The test bench for rapid changeover of multiple oil pump models according to claim 8, characterized in that: The qualified instruction includes a first status light and a second status light; the first status light is used to indicate abnormal rotation alignment, and the second status light is used to indicate insufficient fastening.

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