A device for testing the kinematic balance of engine connecting rod components

Abstract

The present invention relates to the field of mechanical component testing technology, and in particular to an engine connecting rod component motion balance test device, comprising a left ground frame and a right ground frame that are relatively spaced and fixedly arranged, an upper seat and a lower seat are respectively fixedly installed from top to bottom in the space between the left ground frame and the right ground frame, an opposing connecting rod test linkage unit is installed inside the test chamber, two connecting rod assemblies are respectively spaced apart and installed on the upper and lower parts of the opposing connecting rod test linkage unit, and a plurality of constraint test units are installed on the top of the upper seat and the bottom of the lower seat. The engine connecting rod component motion balance test device designed in the present invention can complete the test of connecting rod products after production or faulty connecting rods after inspection, and can effectively use qualified products to cooperate with the operation under simulated working conditions to realize the rapid judgment of whether the motion balance of the connecting rod component to be tested is qualified or not, and effectively improve the test efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical component testing, in particular to a device for testing the kinematic balance of an engine connecting rod component. Background Art

[0002] There are many technologies and equipment for testing mechanical parts such as engine connecting rods in the prior art. After searching, a patent document with patent application number CN202020269738.9 and IPC classification number G01M15 / 00 (20060101) discloses an engine connecting rod stress test device, which mainly uses a cylinder frame installed on the top of the engine connecting rod to cooperate with a piston and various signal acquisition and transmission modules and signal receiving and processing modules to complete the stress test of the engine connecting rod during periodic motion.

[0003] However, the engine connecting rod stress testing device in the prior art can only complete the top stress test when testing the connecting rod component, and has the following shortcomings in actual work:

[0004] First, during the test process, only the stress of the connecting rod is tested and it is not possible to relatively comprehensively test the balance and stability of the current connecting rod during operation. The impact of stress changes cannot be used as an evaluation standard for the smooth movement and safety of the entire engine connecting rod component.

[0005] Second, since the connecting rod and the crankshaft, as well as the connecting rod and the piston are in a mating state during the periodic operation, completing the stress test on the connecting rod only from the top cannot complete the analysis of the stress distribution of the connecting rod under the overall operating state.

[0006] Third, when testing engine connecting rod components before leaving the factory, due to the presence of connecting rod components from different batches in the workshop, the existing stress testing device has a single limitation in application and poor applicability, and cannot meet the requirements of batch testing conditions.

[0007] Based on this, the present invention optimizes the design for the problems existing in the prior art in the process of testing engine connecting rod components, and hereby proposes a motion balance testing device for engine connecting rod components to better solve the problems existing in the prior art. Summary of the invention

[0008] The present invention is to solve one of the above-mentioned technical problems, and the technical solution adopted is: an engine connecting rod component motion balance testing device, comprising a left ground frame and a right ground frame that are relatively spaced and fixedly arranged, an upper seat and a lower seat are respectively fixedly installed from top to bottom in the space between the left ground frame and the right ground frame, a test chamber is formed between the upper seat and the lower seat, an opposed connecting rod test linkage unit is installed inside the test chamber, two connecting rod assemblies are respectively spaced apart and installed at intervals on the upper and lower parts of the opposed connecting rod test linkage unit, a plurality of constraint test units are installed on the top of the upper seat and the bottom of the lower seat, each of the constraint test units is respectively used to constrain the connecting rod assembly at its corresponding position, a power input end of the opposed connecting rod test linkage unit passes to the right to the outside of the right ground frame and is connected to the output end of a fixedly arranged driving unit.

[0009] In any of the above schemes, preferably, a first deviation unit is installed between the two constraint test units above the upper seat; and a second deviation unit is installed between the two constraint test units below the lower seat.

[0010] In any of the above schemes, preferably, the first deviation unit and the second deviation unit both adopt horizontal deviation units with the same structure, and the horizontal deviation unit includes a horizontal tempered glass cylinder, and the left and right ends of the horizontal tempered glass cylinder are fixedly mounted on the constraint test unit on the corresponding side, and the left and right ends of the horizontal cavity inside the horizontal tempered glass cylinder are respectively connected to the interior of the vertical piston cavity of the constraint test unit at the corresponding positions at its two ends, and scale lines are respectively arranged on the middle outer wall of the horizontal tempered glass cylinder along the left and right length directions thereof, and the zero scale of the scale line is located at the center of the middle outer wall of the horizontal tempered glass cylinder, and the scales on both sides of the zero scale line are symmetrically arranged with each other, and a central piston is installed on the sealing plug at the central position of the horizontal cavity, and a central annular groove is arranged at the center of the central piston; in the standard installation state, the central vertical surface of the central annular groove overlaps with the vertical surface where the zero scale line is located.

[0011] In any of the above solutions, it is preferred that the current offset state of the central piston is determined by observing the scale line at the position of the central vertical surface of the central annular groove.

[0012] In any of the above schemes, it is preferred that the opposed connecting rod test linkage unit includes a central axis, and a plurality of central splines are bolted and fixed at intervals on the outer wall of the central axis along its length direction, and a crank is arranged between adjacent ends of two adjacent central splines, and the crank is composed of two cranks symmetrically arranged at intervals, and the ends of each crank are fixed at the end faces of the central splines at their corresponding positions, and each crank is fitted and sleeved on the outer wall of the central spline at its corresponding position through a spline sleeve bolted and fixedly connected at its end, and a connecting rod journal is arranged between the two symmetrically arranged cranks, and the two ends of the connecting rod journal are respectively matched with the crank spline holes arranged at the end positions of the cranks through journal splines bolted and fixedly connected thereon, and the connecting rod assembly is respectively fitted and sleeved on the outer wall of the connecting rod journal between the two symmetrically arranged cranks.

[0013] Preferably, in any of the above schemes, a center-end locking nut is threadedly screwed on the outer wall at the left end of the center shaft, and the right end of the center-end locking nut is pressed against the left end face of the crank at its corresponding position, and a journal-end locking nut is threadedly screwed on the outer walls at both ends of the two connecting rod journals, and each of the journal-end locking nuts is used to press against the end face of the crank at its corresponding position, and clamps are fixedly installed on the outer walls on both sides of the connecting rod journal between the two cranks, and the clamps are fixedly sleeved on the outer wall of the connecting rod journal, and the end of the clamp is used to press against the end of the crank at its corresponding position, and the right end face of the crank located on the far right is pressed against the right side connecting frame.

[0014] In any of the above schemes, it is preferred that a central bearing sleeve is fixedly installed on the inner wall of the left-side ground frame and the inner wall of the right-side ground frame on the left and right sides of the test chamber, and each central bearing sleeve is movably connected to the outer wall of the central axis at its corresponding position and is used to achieve coaxial support for both ends of the central axis.

[0015] In any of the above schemes, it is preferred that the connecting rod assembly includes a connecting rod member, and the connecting rod member is engaged with the periphery of the journal spline at its corresponding position through a connecting rod spline sleeve key installed in a root through hole thereof, and both ends of the connecting rod member are pressed against the end face of the crank at its corresponding position, and a linkage shaft is movably hinged at the outer end of the connecting rod member, and the linkage shaft is hinged to the movable end of the constraint test unit at its corresponding position.

[0016] In any of the above schemes, it is preferred that the constraint test unit includes a constraint piston cylinder fixedly installed on the upper seat or the lower seat, a linkage piston is cooperatedly installed in the vertical piston cavity of the constraint piston cylinder, the inner end of the linkage piston is movably hinged with the linkage shaft at its corresponding position, a sealing end cover is installed at the port of the outer end of the linkage piston, a built-in air pressure sensor is installed in the concave cavity on the inner end surface of the sealing end cover, and the built-in air pressure sensor is signal-connected to a controller with a display fixed to the outside of the sealing end cover.

[0017] In any of the above schemes, it is preferred that the driving unit includes a driving motor fixedly mounted on the outer wall of the right side ground frame, a driving gear is installed at the output end of the driving motor, a transmission gear is meshed above the driving gear, and the inner end of the transmission gear is fixedly connected to the end of the central axis movably extending to the outside of the right side ground frame through a coupling.

[0018] In any of the above solutions, preferably, each of the connecting rods is of the same model.

[0019] In any of the above schemes, preferably, the four connecting rods include at least one connecting rod that has passed the quality inspection.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The engine connecting rod component motion balance test device designed in the present invention can complete the test of connecting rod products after production or faulty connecting rods after inspection and repair, and can effectively use qualified products to complete the operation under simulated working conditions to realize the rapid judgment of whether the motion balance of the connecting rod component to be tested is qualified or not, thereby effectively improving the test efficiency.

[0022] 2. The present invention can simultaneously complete the rapid test of the motion balance of multiple connecting rods when testing the connecting rods, and can judge the relative quality of the connecting rod products to be tested by comparing the differences, thereby improving the test efficiency and providing a comparison reference, effectively improving the intuitiveness and reliability of the test, and ensuring the stability of the connecting rod when it is subsequently used with the engine.

[0023] 3. The opposed connecting rod test linkage unit of the present invention adopts a crank-like combined installation structure, which can effectively realize the assembly of connecting rods of different models according to different test requirements, and effectively ensure its overall versatility.

[0024] 4. When the device can quickly complete the periodic driving of the four connecting rods under the driving action of the driving unit, it can fully obtain the pressure of each connecting rod on the inside of the constraint test unit during the movement and effectively judge the changes in the pressure during the movement of the connecting rod, and then judge the changes in the balance and stability of the four connecting rods during the movement.

[0025] 5. In the present invention, the built-in air pressure sensor at the end of each constraint test unit is used to complete data collection of the peak pressure of the connecting rod in motion and timely feed it back to the controller for collection and display. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn according to the actual scale.

[0027] Figure 1 It is a structural schematic diagram of the engine connecting rod component motion balance testing device of the present invention.

[0028] Figure 2 It is a schematic diagram of the main structure of the opposed connecting rod test linkage unit of the present invention in the installed state.

[0029] Figure 3 It is a partial three-dimensional structural schematic diagram of the opposed connecting rod test linkage unit of the present invention.

[0030] Figure 4 for Figure 2 Schematic diagram of the internal cross-sectional structure.

[0031] Figure 5 The figure is a schematic diagram of the internal cross-sectional structure of the engine connecting rod component motion balance testing device of the present invention.

[0032] Figure 6 for Figure 2 Schematic diagram of the local three-dimensional structure.

[0033] Figure 7 for Figure 6 Schematic diagram of the main structure.

[0034] Figure 8 for Figure 7 Schematic diagram of the partial cross-sectional structure.

[0035] Fig. 9 It is a schematic diagram of the internal cross-sectional structure of the horizontal deviation unit of the present invention.

[0036] Fig.10It is a schematic diagram of the three-dimensional structure of the connecting rod journal and the journal spline installed thereon of the present invention.

[0037] Fig.11 It is a schematic diagram of the three-dimensional structure of the central shaft of the present invention and the central spline installed thereon.

[0038] Fig.12 for Figure 2 Schematic diagram of the side structure.

[0039] Fig.13 for Figure 6 Schematic diagram of the side structure.

[0040] Fig.14 It is a schematic diagram of the three-dimensional structure of the connecting rod member of the present invention.

[0041] In the figure, 1, left side connecting frame; 2, right side connecting frame; 3, upper seat; 4, lower seat; 5, test chamber; 6, connecting rod assembly; 601, connecting rod member; 602, linkage shaft; 7, constraint test unit; 701, constraint piston cylinder; 702, vertical piston chamber; 703, linkage piston; 704, sealing end cover; 705, built-in air pressure sensor; 706, display; 8, center shaft; 9, center spline; 10, crank; 11, spline sleeve; 12, connecting rod journal; 13, journal spline; 14, crank spline hole; 15 , center end locking nut; 16, journal end locking nut; 17, clamp; 18, center bearing sleeve; 19, drive motor; 20, drive gear; 21, transmission gear; 22, first deviation unit; 23, second deviation unit; 24, horizontal tempered glass cylinder; 25, horizontal cavity; 26, scale line; 27, center piston; 28, center ring groove; 29, electromagnetic control valve; 30, first cable; 31, first vibration sensor; 32, second cable; 33, second vibration sensor; 34, connecting rod spline sleeve. DETAILED DESCRIPTION

[0042] The following is a detailed description of the embodiments of the technical solution of the present invention in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present invention. Figure 1-Figure 14 as shown in .

[0043] Embodiment 1: A device for testing the motion balance of an engine connecting rod component, comprising a left ground frame 1 and a right ground frame 2 that are relatively spaced and fixedly arranged, wherein an upper seat 3 and a lower seat 4 are fixedly installed from top to bottom in the space between the left ground frame 1 and the right ground frame 2, respectively, a test chamber 5 is formed between the upper seat 3 and the lower seat 4, an opposed connecting rod test linkage unit is installed inside the test chamber 5, two connecting rod assemblies 6 are respectively spacedly installed at the upper and lower parts of the opposed connecting rod test linkage unit, a plurality of constraint test units 7 are installed on the top of the upper seat 3 and the bottom of the lower seat 4, each of the constraint test units 7 is used to constrain the connecting rod assembly 6 at its corresponding position, a power input end of the opposed connecting rod test linkage unit passes to the right to the outside of the right ground frame 2 and is connected to the output end of a fixedly arranged driving unit.

[0044] It should be noted that the engine connecting rod component motion balance test device designed in the present invention as a whole can rely on the opposed connecting rod test linkage unit to simultaneously complete the motion balance and stability test of the four connecting rod parts 601. By controlling the transmission speed of the driving unit, the opposed connecting rod test linkage unit and the connecting rod assembly 6 connected thereto can be driven to complete periodic operation. At the same time, with the cooperation of each constraint test unit 7, the periodic operation state of the connecting rod assembly 6 in the motion state can be tested.

[0045] During the test, the internal air pressure peak value can be acquired by relying on the built-in air pressure sensor 705 on the constraint test unit 7, which effectively provides a basis for subsequent data analysis.

[0046] In any of the above schemes, it is preferred that the opposed connecting rod test linkage unit includes a central shaft 8, and a plurality of central splines 9 are bolted and fixed at intervals on the outer wall of the central shaft 8 along its length direction, and a crank is arranged between the adjacent ends of two adjacent central splines 9, and the crank is composed of two symmetrically spaced cranks 10, and the ends of each crank 10 are fixed at the end faces of the central splines 9 at their corresponding positions, and each crank 10 is sleeved on the outer wall of the central spline 9 at its corresponding position through a spline sleeve 11 bolted and fixedly connected at its end, and a connecting rod journal 12 is arranged between the two symmetrically arranged cranks, and the two ends of the connecting rod journal 12 are respectively matched with the crank spline holes 14 arranged at the end positions of the crank 10 through journal splines 13 bolted and fixedly connected thereon, and the connecting rod assembly 6 is respectively sleeved and installed on the outer wall of the connecting rod journal 12 between the two symmetrically arranged cranks 10.

[0047] The opposed connecting rod test linkage unit adopts a detachable assembly combination structure as a whole, relying on the central shaft 8 as the power input shaft. During the rotation of the central shaft 8, the central spline 9 is used to drive the corresponding crank to realize the crankshaft movement. During the movement, the connecting rod journal 12 is relied on to provide fixed axis support for the corresponding connecting rod assembly 6.

[0048] As accessories on the test equipment, all parts inside the entire opposed-link test linkage unit must undergo quality inspection before and after assembly and be put into use after meeting the standards, thereby ensuring that the entire device can meet the use requirements during testing.

[0049] In any of the above schemes, it is preferred that a center end locking nut 15 is threadedly screwed on the outer wall of the left end of the center shaft 8, and the right end of the center end locking nut 15 is pressed against the left end face of the crank at its corresponding position, and a journal end locking nut 16 is threadedly screwed on the outer walls at both ends of the two connecting rod journals 12, and each of the journal end locking nuts 16 is used to press against the end face of the crank at its corresponding position, and clamps 17 are fixedly installed on the outer walls of both sides of the connecting rod journal 12 between the two cranks, and the clamps 17 are fixedly sleeved on the outer wall of the connecting rod journal 12, and the end of the clamp 17 is used to press against the end of the crank at its corresponding position, and the right end face of the crank located on the far right is pressed against the right side connecting frame 2.

[0050] Taking into account the stability and firmness of each component in the entire assembled opposed connecting rod test linkage unit structure, a center-end locking nut 15 is provided here to complete the positioning of the left end of the center shaft 8, and at the same time cooperates with the journal-end locking nut 16 and each detachable clamp 17 to control the positioning of the corresponding connecting rod journal 12 and each crank installed thereon, thereby achieving the purpose of stable positioning.

[0051] In any of the above schemes, it is preferred that a center bearing sleeve 18 is fixedly installed on the inner wall of the left-side ground frame 1 and the inner wall of the right-side ground frame 2 on the left and right sides of the test chamber 5, and each center bearing sleeve 18 is movably sleeved on the outer wall of the center axis 8 at its corresponding position and is used to achieve coaxial support for both ends of the center axis 8.

[0052] Taking into account that the entire opposed connecting rod test linkage unit mainly relies on the central shaft 8 for support, the central bearing sleeves 18 at both ends are used to support the two ends of the central shaft 8 to ensure the stability of the structural support of the entire central shaft 8. In addition, considering that the right end of the central shaft 8 is fixedly connected to the drive unit, its stability can be further enhanced, so the stability of the entire central shaft 8 can be guaranteed.

[0053] In any of the above schemes, it is preferred that the connecting rod assembly 6 includes a connecting rod member 601, and the connecting rod member 601 is engaged with the periphery of the journal spline 13 at its corresponding position through a connecting rod spline sleeve 34 key installed in a root through hole thereof, and both ends of the connecting rod member 601 are pressed against the end face of the crank 10 at its corresponding position, and a linkage shaft 602 is movably hinged at the outer end of the connecting rod member 601, and the linkage shaft 602 is hinged to the movable end of the constraint test unit 7 at its corresponding position.

[0054] The connecting rod assembly 6 serves as the tested component in the present invention. As a whole, the connecting rod spline sleeve 34 at the inner end of the connecting rod member 601 and the outer periphery of the journal spline 13 realize spline cooperation, thereby ensuring that the root of the entire connecting rod member 601 can obtain stable support and limit support; considering that the connecting rod member 601 needs to cooperate with the constraint test unit 7, the two ends of the connecting rod member 601 are tightened by the end faces of the crank 10 at their corresponding positions. The lateral stability of the connecting rod member 601 can be controlled, thereby ensuring that the lateral offset is reduced when the connecting rod member 601 moves.

[0055] In any of the above schemes, it is preferred that the constraint test unit 7 includes a constraint piston cylinder 701 fixedly installed on the upper seat 3 or the lower seat 4, a linkage piston 703 is cooperatedly installed in the vertical piston chamber 702 of the constraint piston cylinder 701, the inner end of the linkage piston 703 is movably hinged with the linkage shaft 602 at its corresponding position, a sealing end cover 704 is installed at the port of the outer end of the linkage piston 703, a built-in air pressure sensor 705 is installed in the concave cavity on the inner end surface of the sealing end cover 704, and the built-in air pressure sensor 705 is signal-connected to a controller with a display 706 fixed to the outside of the sealing end cover 704.

[0056] The constraint test unit 7 adopts a linkage piston 703 that is inserted into the corresponding constraint piston vertical cylinder 701 to realize the constraint limit of the linkage piston 703, and relies on the continuous top pressure or pulling and pressing of the connecting rod 601 to realize the control of the axial displacement of the linkage piston 703 along the constraint piston vertical cylinder 701. When the connecting rod 601 drives the linkage piston 703 to move, the space in the vertical piston chamber 702 can be continuously changed, so that the internal pressure can be changed. The built-in air pressure sensor 705 can effectively test the pressure change in the space in the current vertical piston chamber 702 and record the pressure peak, so as to effectively judge the peak change amplitude during the current multiple periodic motions, and then judge the balance and stability of the movement of the current connecting rod 601 during the periodic operation.

[0057] In addition, by recording the corresponding pressure changes of the connecting rod 601 during the movement in each cycle through the built-in air pressure sensor 705 and generating a pressure change curve using the existing technology, the balance of the current connecting rod 601 during the movement can be better obtained.

[0058] The present invention indirectly reflects the smoothness of the current movement of the connecting rod 601 by means of air pressure changes, which can better achieve accurate testing, effectively ensure the effective acquisition of the entire periodic motion process and special peak points of the connecting rod 601, and realize better testing and analysis and judgment of the current motion state of the connecting rod 601.

[0059] In any of the above schemes, it is preferred that the driving unit includes a driving motor 19 fixedly mounted on the outer wall of the right side ground frame 2, a driving gear 20 is mounted on the output end of the driving motor 19, a transmission gear 21 is meshed above the driving gear 20, and the inner end of the transmission gear 21 is fixedly connected to the end of the central shaft 8 that movably passes through the outside of the right side ground frame 2 through a coupling.

[0060] The driving unit uses a driving motor 19 as a power component, and relies on the driving motor 19 to drive the corresponding driving gear 20 and transmission gear 21 to input the entire power into the central shaft 8, thereby achieving the purpose of controlling the periodic operation of the entire opposed connecting rod test linkage unit.

[0061] In any of the above solutions, preferably, each of the connecting rods 601 is of the same model.

[0062] In the present invention, when testing, multiple connecting rods 601 of the same model can be tested, which can effectively ensure the efficiency of the entire operation test.

[0063] In any of the above solutions, preferably, the four connecting rods 601 include at least one connecting rod that has passed the quality inspection (referred to as a standard connecting rod).

[0064] When it is necessary to test a new connecting rod 601 or a repaired connecting rod 601, the connecting rod 601 that has passed the quality inspection can be used as a reference for the remaining connecting rods 601. By observing the differences between the remaining connecting rods 601 to be tested and the standard connecting rod 601, the problems of the current connecting rod 601 in the simulated test can be analyzed and compared.

[0065] Embodiment 2: Compared with Embodiment 1, this embodiment is different in that it also includes the following technical features:

[0066] In any of the above schemes, preferably, a first deviation unit 22 is installed between the two constraint test units 7 above the upper seat 3 ; and a second deviation unit 23 is installed between the two constraint test units 7 below the lower seat 4 .

[0067] In the present invention, a horizontal deviation unit is used to realize intuitive observation of the internal pressure deviation between the two constraint test units 7 at relative positions. By observing the scale display of the horizontal deviation unit, the pressure change situation inside the two constraint test units 7 can be more intuitively reflected, thereby effectively reflecting the deviation amplitude of the two corresponding connecting rod members 601 during the periodic operation, thereby qualitatively analyzing the current movement state deviation amplitude of the two connecting rod members 601.

[0068] In any of the above schemes, it is preferred that the first deviation unit 22 and the second deviation unit 23 both adopt horizontal deviation units with the same structure, and the horizontal deviation unit includes a horizontal tempered glass cylinder 24, and the left and right ends of the horizontal tempered glass cylinder 24 are fixedly mounted on the constraint test unit 7 on the corresponding side, and the left and right ends of the horizontal cavity 25 inside the horizontal tempered glass cylinder 24 are respectively connected to the interior of the vertical piston cavity 702 of the constraint test unit 7 at the corresponding positions at its two ends, and scale lines 26 are respectively arranged on the middle outer wall of the horizontal tempered glass cylinder 24 along the left and right length directions thereof, and the zero scale of the scale line 26 is located at the center of the middle outer wall of the horizontal tempered glass cylinder 24, and the scales on both sides of the zero scale line are symmetrically arranged with each other, and a central piston 27 is installed on the sealing plug at the central position of the horizontal cavity 25, and a central annular groove 28 is arranged at the center of the central piston 27; in the standard installation state, the central vertical surface of the central annular groove 28 overlaps with the vertical surface where the zero scale line is located.

[0069] In any of the above solutions, it is preferred that the current offset state of the central piston 27 is determined by observing the scale line 26 at the position of the central vertical surface of the central annular groove 28 .

[0070] Electromagnetic control valves 29 are respectively installed at the left and right ends of the horizontal tempered glass cylinder 24 .

[0071] By controlling the electromagnetic control valve 29 , the vertical piston chamber 702 on the corresponding side can be connected to or cut off from the interior of the horizontal chamber 25 .

[0072] The horizontal deviation unit uses a horizontal tempered glass cylinder 24 as a connecting part, and the internal central piston 27 relies on the driving force driven by the air pressure deviation on both sides as the moving power. Therefore, by observing the deviation of the central piston 27 moving to the left and right sides, the deviation degree of the current two connecting rods 601 at the peak movement state is realized.

[0073] The specific deviation determination amplitude is determined according to the currently set inner diameter and size ratio of the horizontal cavity 25 and the vertical piston cavity 702, so as to better ensure the accuracy in determining the deviation.

[0074] Embodiment 3: Compared with Embodiment 2, this embodiment is different in that it also includes the following technical features:

[0075] The central shaft 8 and the connecting rod journal 12 in the present invention are both hollow structures with both ends being through-set.

[0076] A first cable 30 is arranged in the central cavity of the central axis 8, and a first vibration sensor 31 is respectively installed in the mounting hole corresponding to the central axis 8 on the outside of each of the connecting rod members 601. The first vibration sensor 31 is connected to the external controller signal through the first cable 30. Each of the first vibration sensors 31 is used to detect the vibration information of the end of the connecting rod member 601 at the current position and provide feedback and record it in time.

[0077] It should be noted that: in the present invention, multiple first vibration sensors 31 are used to obtain the vibration information of the ends of the corresponding connecting rod members 601 in the moving state, so as to determine the vibration conditions of the inner ends of each current connecting rod member 601 during the movement and compare them with the design requirements to determine whether the balance and stability of the current connecting rod member 601 during the movement meet the requirements.

[0078] A second cable 32 is arranged in the central cavity of the connecting rod journal 12, and a second vibration sensor 33 is respectively installed in the mounting hole corresponding to the connecting rod journal 12 on the inner side of each connecting rod spline sleeve 34. The second vibration sensor 33 is connected to the external controller signal through the second cable 32. Each second vibration sensor 33 is used to detect the radial vibration information of the connecting rod spline sleeve 34 at the current position and timely feedback and record it.

[0079] It should be noted that: in the present invention, multiple second vibration sensors 33 are used to respectively obtain the vibration information of the corresponding connecting rod spline sleeves 34 that cooperate with the connecting rod member 601 in the moving state, so as to judge the vibration condition of the inner end of each connecting rod spline sleeve 34 during the movement, and in the subsequent evaluation process, the obtained vibration information of the current connecting rod member 601 during the movement is combined to comprehensively evaluate whether the balance and stability meet the requirements, so as to ensure the comprehensive stability evaluation of the movement condition of the connecting rod member 601 after the entire test is completed.

[0080] Specific working principle: Before using the device, the opposed connecting rod test linkage unit is assembled, and the connecting rod assemblies 6 to be tested are installed as needed during the assembly process. After the installation is completed, the two ends of the assembled opposed connecting rod test linkage unit are respectively installed on the left side connecting frame 1 and the right side connecting frame 2 on the corresponding side to maintain the end support, and then the corresponding constraint test units 7 are installed on the corresponding upper seat 3 or lower seat 4 as needed, and the upper seat 3 and the lower seat 4 are fixedly installed in the corresponding positions in sequence, and the corresponding connecting rod member 601 is locked by the clamp 17 and the nut by adjusting each component. The right end of the central axis 8 of the opposed connecting rod test linkage unit is connected to the driving unit, and the starting driving unit can drive the current entire opposed connecting rod test linkage unit and the various connecting rod members 601 installed thereon to follow the movement, so that the current data value can be obtained through the feedback of the vibration information related values ​​of each sensor element during the movement. When testing, multiple connecting rod members 601 of the same model can be tested, which can effectively ensure the efficiency of the entire operation test. When it is necessary to test a new connecting rod 601 or a connecting rod 601 after repair, a standard connecting rod that has passed the quality inspection can be installed as a reference for the remaining connecting rods 601. By observing the difference between the vibration information corresponding to the remaining connecting rods 601 to be tested and the vibration information displayed by the standard connecting rod, the matching problems or matching surface accuracy problems of the current connecting rod 601 in the simulated test can be analyzed and compared. The specific operation example is as follows: record the vibration amplitude and frequency display information of the second vibration sensor 33 corresponding to the current connecting rod 601 to be tested during the movement, and record the vibration amplitude and frequency display information of the second vibration sensor 33 corresponding to the connecting rod 601 as a standard part during the movement, compare the two sets of numerical information obtained, and By comparing and analyzing the differences between the two groups of vibration frequencies and vibration amplitudes during the motion process, it is possible to analyze and determine the difference between the precision quality of the inner circle of the current connecting rod component 601 to be tested at the mating position with the corresponding connecting rod spline sleeve 34 and the standard part, so as to facilitate rapid determination based on the motion test results whether the inner circle surface of the current connecting rod component meets the requirements of vibration stability during the motion test after installation. When the two groups of vibration frequencies and vibration amplitudes differ greatly (generally, when the difference in vibration frequency or vibration amplitude is greater than 20%, the difference is considered to be large), it is determined that the current connecting rod component 601 to be tested does not meet the requirements at the mating sleeve portion with the connecting rod spline sleeve 34, so that it is convenient to reassemble and inspect the portion, complete assembly adjustment, or repair the inner circle surface of the connecting rod component 601 to be tested.

[0081] The device as a whole can rely on the opposed connecting rod test linkage unit to simultaneously complete the test of motion balance and stability of four connecting rod members 601. By controlling the transmission speed of the driving unit, the opposed connecting rod test linkage unit and the connecting rod assembly 6 connected thereto can be driven to complete periodic operation. At the same time, with the cooperation of each constraint test unit 7, the periodic operation state of the connecting rod assembly 6 in the motion state can be tested.

[0082] During the test, the internal air pressure peak value can be acquired by relying on the built-in air pressure sensor 705 on the constraint test unit 7, which effectively provides a basis for subsequent data analysis.

[0083] From the above, it can be seen that the engine connecting rod component motion balance test device of the present design can complete the test of connecting rod products after production or faulty connecting rods after maintenance, and can effectively use qualified products to complete the operation under simulated working conditions to realize the rapid judgment of whether the motion balance of the current connecting rod component 601 to be tested is qualified or not, thereby effectively improving the test efficiency; when testing the connecting rod component 601, it can simultaneously complete the rapid test of the motion balance of multiple connecting rod components 601, and can judge the relative quality qualification of the current connecting rod component 601 to be tested by comparing the differences, thereby improving the test efficiency and providing a comparison reference, effectively improving the intuitiveness and reliability of the test, and ensuring the stability of the connecting rod when it is subsequently used with the engine; the opposed connecting rod test linkage unit adopts a combined installation structure similar to the crank 10, which can effectively realize the assembly of connecting rod components 601 of different models according to different test requirements, thereby effectively ensuring its overall versatility.

[0084] When the device is able to quickly complete the periodic driving of the four connecting rods 601 under the driving action of the driving unit, it can fully obtain the pressure conditions of each connecting rod 601 on the inside of the constraint test unit 7 during the movement and effectively judge the changes in the pressure conditions during the movement of the connecting rod 601, and then judge the changes in the balance and stability of the four connecting rods 601 during the movement; through the built-in air pressure sensor 705 at the end of each constraint test unit 7, the peak pressure of the connecting rod 601 in the moving state is completed. Data is collected and timely fed back to the controller for collection and display.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. For those skilled in the art, any replacement improvements or changes made to the implementation methods of the present invention fall within the protection scope of the present invention.

[0086] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A device for testing the kinematic balance of an engine connecting rod component, characterized in that: It comprises a left side ground-connecting frame and a right side ground-connecting frame which are relatively spaced and fixedly arranged, an upper seat and a lower seat are respectively fixedly installed from top to bottom in the space between the left side ground-connecting frame and the right side ground-connecting frame, a test chamber is formed between the upper seat and the lower seat, an opposed connecting rod test linkage unit is installed inside the test chamber, two connecting rod assemblies are respectively spacedly installed at the upper and lower parts of the opposed connecting rod test linkage unit, a plurality of constraint test units are installed at the top of the upper seat and the bottom of the lower seat, each of the constraint test units is respectively used to constrain the connecting rod assembly at its corresponding position, a power input end of the opposed connecting rod test linkage unit passes rightward to the outside of the right side ground-connecting frame and is connected to the output end of a fixedly arranged driving unit; The opposed connecting rod test linkage unit comprises a central axis, on the outer side wall of the central axis a plurality of central splines are bolted and fixed at intervals along the length direction thereof, a crank is arranged between adjacent ends of two adjacent central splines, the crank is composed of two cranks symmetrically arranged at intervals, the ends of each crank are fixed at the end faces of the central splines at their corresponding positions, each crank is sleeved on the outer side wall of the central splines at its corresponding position through a spline sleeve bolted and fixedly connected at its end, a connecting rod journal is arranged between the two symmetrically arranged cranks, the two ends of the connecting rod journal are respectively matched with crank spline holes arranged at the end positions of the cranks through journal splines bolted and fixedly connected thereon, and the connecting rod assembly is respectively sleeved and installed on the outer side wall of the connecting rod journal between the two symmetrically arranged cranks; The connecting rod assembly includes a connecting rod member, wherein the connecting rod member is keyed to the periphery of the journal spline at the corresponding position thereof through a connecting rod spline sleeve keyed and installed in a through hole at the root thereof, both ends of the connecting rod member are pressed tightly by the end surface of the crank at the corresponding position thereof, and a linkage shaft is movably hinged at the outer end of the connecting rod member, and the linkage shaft is hinged to the movable end of the constraint test unit at the corresponding position thereof; The constraint test unit includes a constraint piston cylinder fixedly installed on the upper seat or the lower seat, a linkage piston is installed in the vertical piston cavity of the constraint piston cylinder, the inner end of the linkage piston is movably hinged with the linkage shaft at its corresponding position, a sealing end cover is installed at the port of the outer end of the linkage piston, a built-in air pressure sensor is installed in the concave cavity on the inner end surface of the sealing end cover, and the built-in air pressure sensor is connected to the signal of a controller with a display fixed on the outside of the sealing end cover.

2. The engine connecting rod component motion balance testing device according to claim 1, characterized in that: A center-end locking nut is threadedly screwed on the outer wall at the left end of the center shaft, and the right end of the center-end locking nut is pressed against the left end face of the crank at its corresponding position. A journal-end locking nut is threadedly screwed on the outer walls at both ends of the two connecting rod journals, and each journal-end locking nut is used to press against the end face of the crank at its corresponding position. Clamps are fixedly installed on the outer walls on both sides of the connecting rod journal between the two cranks, and the clamps are fixedly sleeved on the outer wall of the connecting rod journal, and the end of the clamp is used to press against the end of the crank at its corresponding position, and the right end face of the crank located on the far right is pressed against the right side connecting frame.

3. The engine connecting rod component motion balance testing device according to claim 2, characterized in that: Central bearing sleeves are fixedly installed on the inner wall of the left-side ground frame and the inner wall of the right-side ground frame on the left and right sides of the test chamber. Each central bearing sleeve is movably connected to the outer wall of the central axis at its corresponding position and is used to achieve coaxial support for both ends of the central axis.

4. The engine connecting rod component motion balance testing device according to claim 3, characterized in that: The driving unit includes a driving motor fixedly mounted on the outer wall of the right side ground frame, a driving gear is mounted on the output end of the driving motor, a transmission gear is meshed above the driving gear, and the inner end of the transmission gear is fixedly connected to the end of the central shaft that movably passes through the outside of the right side ground frame through a coupling.

5. The engine connecting rod component motion balance testing device according to claim 4, characterized in that: All the connecting rods are of the same model.

6. The engine connecting rod component motion balance testing device according to claim 5, characterized in that: The four connecting rod components include at least one connecting rod component that has passed the quality inspection.

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