Control Method for a Precision-Adjustable Engine Quick Centering Device

Abstract

The present invention discloses a control method for a precisely adjustable engine quick alignment device, and the method includes: 1) establishing a three-dimensional coordinate positioning table for front and rear supports on the quick-install trolley according to engine model, gantry, front and rear support legs, and drive shaft type data; 2) based on relevant information used in engine testing, the engine is initially positioned to ensure that the front and rear support legs no longer move; 3) a laser alignment instrument measures the deviation between the engine flywheel disc and the basic alignment disc; 4) a small servo motor drives the support legs to perform precise movement through a thrust mechanism according to the deviation measured by the laser alignment instrument, and completes the alignment process between the engine and the test bench. The control method for the precisely adjustable engine quick alignment device provided by the present invention helps automotive engine testers quickly complete the precise alignment between the automotive engine and the test bench, improves the alignment efficiency of automotive engine testers when aligning the automotive engine and the test bench, and extends the service life of the support legs.

Description

Technical Field

[0001] The present invention relates to the technical field of engine testing, and specifically refers to a control method for a precisely adjustable rapid engine alignment device. Background Art

[0002] During the testing process of automotive engines, test benches are required. However, due to the diverse types of drive shafts and engine models on the test benches, different engine models have different requirements for gantries, suspension supports, etc. As the engine models vary, a large amount of time is needed for the rough positioning of the engine support. During the alignment process, a pendulum hammer is used to gradually knock the engine into the appropriate position. Existing testing technologies and devices are unable to precisely control the knocking force, resulting in frequent repetition, low efficiency, and damage to the support legs. After being knocked multiple times, the support legs become severely deformed and unusable. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems by providing a control method for a precisely adjustable rapid engine alignment device. Relying on the precisely adjustable rapid engine alignment device, it helps automotive engine testers quickly complete the alignment and precise adjustment of the automotive engine and the test bench. This method can improve the alignment efficiency of the engine and the test bench and extend the service life of the support legs.

[0004] The present invention provides a control method for a precisely adjustable rapid engine alignment device, including the following steps:

[0005] Step S1. Based on data such as engine model, gantry, front and rear supports, and drive shaft type, establish a three-dimensional coordinate positioning table for the front and rear supports on the quick-install trolley;

[0006] Step S2. According to the engine model used for engine testing, the form of the gantry, the front and rear supports, and the drive shaft model of the corresponding test bench, place the support legs at the pre-set coordinate positions to complete the initial positioning of the engine and ensure that the front and rear support legs no longer move back and forth;

[0007] Step S3. Use a laser alignment instrument to measure the deviation between the engine flywheel disc and the basic alignment disc;

[0008] Step S4. The small servo motor drives the support legs to move precisely through the thrust mechanism according to the deviation measured by the laser alignment instrument to complete the alignment process between the engine and the test bench.

[0009] Specifically, in step S1, the initial position of the three-dimensional coordinate positioning table is that the direction of the longitudinal beam is the X direction of the coordinate, and X0 represents the initial coordinate on the left front support leg side in the X direction; the coordinate along the crossbeam direction is defined as the Y direction, and Y0 represents the initial coordinate on the left front support leg side in the Y direction; the Z direction represents the direction perpendicular to the horizontal plane of the crossbeam and longitudinal beam, and Z0 represents the coordinate when the support leg is compressed to the shortest position.

[0010] Specifically, in step S3, the deviations between the engine flywheel disk and the centering base disk measured by the laser centering instrument are up-down deviations and left-right deviations.

[0011] Specifically, in step S4, the small servo motor processes the up and down deviations measured by the laser centering instrument, and needs to adjust the screws on the support legs for up and down alignment, and convert and adjust the rotation angles of the screws on the support legs one by one.

[0012] Specifically, in step S4, the left and right deviations fed back by the laser centering instrument are used to precisely adjust the supporting legs one by one through the thrust mechanism installed on the cross beam of the supporting legs.

[0013] Specifically, the thrust mechanism includes: a thrust seat, a rotating thrust hexagonal gear, a small bevel gear, a locking seat, a slider, a locking head, a large bevel gear, a screw, a thrust screw sleeve, a locking bolt, and a small servo motor; the locking head is fixed on the grooves of the front beam and the rear beam; the locking seat is close to the front beam and the rear beam; a locking bolt is provided inside the locking seat and passes through the slider to fix the thrust mechanism on the front beam and the rear beam; the locking seat fits the thrust seat in the horizontal direction; a thrust screw sleeve is provided inside the thrust seat; a screw is provided inside the thrust screw sleeve; one end of the screw extends out of the thrust screw sleeve to support the support leg, and the other end is provided with a large bevel gear; the large bevel gear and the small bevel gear are engaged with each other; the upper part of the small bevel gear passes through the thrust seat and is connected with the rotating thrust hexagonal gear.

[0014] Specifically, the rotating thrust hexagonal gear is fixedly connected to a small servo motor, which drives the rotating thrust hexagonal gear and the small bevel gear to rotate. The small bevel gear drives the large bevel gear, thereby driving the lead screw to move along the thread direction in the thrust screw sleeve, driving the support leg to move in the left and right directions.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides a control method for a precisely adjustable engine rapid centering device, which helps automobile engine testers to quickly complete the centering and precise adjustment of the automobile engine and the test bench. The method can improve the centering efficiency of the automobile engine testers when centering the automobile engine and the test bench, and extend the service life of the support legs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A flow chart of a control method for a precisely adjustable engine rapid centering device;

[0018] Figure 2 This is a top view of the quick-install trolley and support legs;

[0019] Figure 3Side view of the quick - mounting trolley and the support legs;

[0020] Figure 4 Sectional view of the thrust mechanism;

[0021] Figure 5 Top view of the thrust mechanism;

[0022] Wherein: 1. Support legs, 101. Right front support leg, 102. Right rear support leg, 103. Left front support leg, 104. Left rear support leg, 2. Cross beam, 201. Front cross beam, 202. Rear cross beam, 3. Trolley positioning block, 4. Quick - mounting trolley, 5. Thrust mechanism, 501. Thrust seat, 502. Rotary thrust hexagon, 503. Small bevel gear, 504. Locking seat, 505. Slide block, 506. Locking head, 507. Large bevel gear, 508. Lead screw, 509. Thrust bushing, 510. Locking bolt, 511. Small servo motor. Detailed implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] The present invention provides a control method for an engine quick alignment device that can be precisely adjusted, which helps automotive engine testers quickly complete the precise adjustment and alignment of an automotive engine and a test bench. This method can improve the alignment efficiency and extend the service life of the support legs.

[0025] Figure 1 As shown, a control method for an engine quick alignment device that can be precisely adjusted includes the following steps:

[0026] Step S1. According to the engine model, gantry, front - rear support, and drive shaft type data, establish a three - dimensional coordinate positioning table for the front - rear support on the engine quick alignment device that can be precisely adjusted;

[0027] Prepare for the test according to the engine model to determine whether the test is carried out on a performance test bench or a durability test bench, so as to determine the type of the drive shaft. If it is a performance test, a 540 - mm - long transient drive shaft is used. If it is a durability test, a 480 - mm - long shaft is used. The length of the shaft determines the relative position of the X coordinate. Each engine model corresponds to two types of gantries, one is an arch - type inverted U - shaped gantry, and the other is a U - shaped support plate gantry. It is mainly selected according to the engine model. Most samples use the inverted U - shaped gantry. If there is interference between the engine components and the inverted U - shaped gantry, the U - shaped support plate gantry will be selected. There are a total of 6 types of front - rear support toolings, and the support tooling is selected according to the engine model. As shown in Table 1:

[0028] Table 1 Support Tooling Table for Each Engine Model

[0029]

[0030] According to the engine model, gantry, front support leg and rear support leg, and drive shaft type data, establish a three-dimensional coordinate positioning table for the front and rear supports on the accurately adjustable engine quick centering device (as shown in Table 1). The 0 coordinates of the XYZ three-dimensional coordinates are defined as follows. Taking Figure 2 The coordinate along the longitudinal beam direction is the X direction, and X0 represents the initial coordinate in the X direction towards the left front support leg side. The coordinate along the cross beam direction is defined as the Y direction, and Y0 represents the initial coordinate in the Y direction towards the left front support leg side. The Z direction represents the direction perpendicular to the horizontal plane of the cross beam and longitudinal beam, and Z0 represents the coordinate when the support leg is compressed to the shortest position. The three-dimensional coordinate positioning table is shown in Table 2:

[0031] Table 2 Three-Dimensional Coordinate Positioning Table

[0032]

[0033] Step S2. Place the right front support leg 101, right rear support leg 102, left front support leg 103, and left rear support leg 104 at the pre-set coordinate positions according to the engine model used for the engine test, the gantry used, the forms of the front and rear supports, and the drive shaft model of the corresponding test bench, so that the engine is initially positioned to ensure that the front and rear support legs do not move forward and backward.

[0034] Select the supports and gantry for the engine to be tested according to the test setup requirements. Look up the three-dimensional coordinate positioning table, and according to the (X, Y, Z) coordinates of the rear 1, rear 2, front 1, and front 2 support legs in the table, initially position each support leg on the trolley platform. The front 1 support leg is the right front support leg; the front 2 support leg is the right rear support leg; the rear 1 support leg is the left front support leg; the rear 2 support leg is the left rear support leg.

[0035] Install the front and rear support plates, front and rear supports, and gantry on the right front support leg 101, right rear support leg 102, left front support leg 103, and left rear support leg 104, hoist the engine onto the trolley platform, and connect it to the support device and the gantry.

[0036] Step S3. Use a laser alignment instrument to measure the deviation between the engine flywheel disc and the alignment basic disc;

[0037] Use a laser alignment instrument to measure the deviation dimensions in the up-down direction (Z-axis) and left-right direction (Y-axis) between the flange surface of the engine flywheel disc and the alignment reference disc. The corresponding deviation dimensions are displayed on the laser alignment instrument, and it respectively prompts how much distance the right front support leg 101, right rear support leg 102, left front support leg 103, and left rear support leg 104 need to be adjusted in the up-down direction and how much distance in the left-right direction, and it also displays the deviation after adjustment in real time.

[0038] Step S4. The small servo motor drives the support legs to perform precise movement through the thrust mechanism according to the deviation measured by the laser alignment instrument, and completes the alignment process between the engine and the test bench. The small servo motor processes the deviation measured by the laser alignment instrument, and needs to adjust the screw on the support leg 1 for alignment in the up-down direction, and converts and adjusts the rotation angle of the screw on each support leg one by one.

[0039] Decompose and process the deviation measured by the laser alignment instrument, and process the deviation in the up-down direction (Z-axis) and the deviation generated in the left-right direction (Y-axis) separately.

[0040] First, for the vertical displacement deviation generated in the Z-axis direction, adjust the screws on the right front support leg 101, right rear support leg 102, left front support leg 103, and left rear support leg 104 respectively, and use the screw rotation angle fitting method to convert the displacement in the vertical direction. The deviations generated by the right front support leg 101, right rear support leg 102, left front support leg 103, and left rear support leg 104 in the vertical direction are different, and each needs to be adjusted one by one to meet the requirements. In this embodiment, the screw pitch is 1 mm, and one full rotation of the screw is 360 degrees, generating a vertical displacement of 1 mm (100 silk). If it is necessary to adjust upward by 50 silk, then rotate the screw clockwise by 180 degrees. If it is necessary to adjust downward by 25 silk, then rotate the screw counterclockwise by 90 degrees, so as to achieve precise adjustment of each support leg in the Z-axis direction and ensure that the deviation value after adjustment is within 0.2 mm (20 silk).

[0041] Read out the deviation data measured by the laser alignment instrument in the Y-axis and manually input it into the small servo motor controller. In the small servo motor controller, first perform fitting between displacement and current to realize the conversion of the small servo motor's control of the motor current into displacement control of the right front support leg 101, right rear support leg 102, left front support leg 103, and left rear support leg 104. Then, through the fuzzy PID control algorithm (fuzzy logic and real-time optimization of the PID parameters according to certain fuzzy rules), achieve precise adjustment for the Y-axis deviation, and adjust the alignment error between the engine and the test bench within the tolerance range. In this embodiment, ensure that the deviation data of the Y-axis after final adjustment is controlled within 0.2 mm.

[0042] Figure 2 、Figure 3 As shown in the figure, a precisely adjustable engine quick alignment device used in an embodiment of the present invention includes support legs 1, a cross beam 2, a trolley positioning block 3, a quick-install trolley 4, and a thrust mechanism 5. The trolley positioning block 3 is fixed on the ground. The quick-install trolley 4 is bolted to the trolley positioning block 3. The support legs 1 include a right front support leg 101, a right rear support leg 102, a left front support leg 103, and a left rear support leg 104. The cross beam 2 includes a front cross beam 201 and a rear cross beam 202. The lower ends of the support legs 1 are fixed to the quick-install trolley 4 by threads. The front cross beam 201 on the right front support leg 101 and the right rear support leg 102 is movable through a limit block. The rear cross beam 202 on the left front support leg 103 and the left rear support leg 104 is movable through a limit block. A thrust mechanism 5 is installed on the front cross beam 201 and the rear cross beam 202. The front cross beam 201 adjusts the movement of the right front support leg 101 and the left front support leg 102 in the left-right direction. The rear cross beam adjusts the movement of the right rear support leg 103 and the left rear support leg 104 in the left-right direction.

[0043] Figure 4 , Figure 5 As shown in the figure, the thrust mechanism 5 includes a thrust seat 501, a rotary thrust hexagon 502, a small bevel gear 503, a locking seat 504, a slider 505, a locking head 506, a large bevel gear 507, a lead screw 508, a thrust screw sleeve 509, a locking bolt 510, and a small servo motor 511. The locking head 506 is fixed to the grooves of the front cross beam 201 and the rear cross beam 202. The locking seat 504 is closely attached to the front cross beam 201 and the rear cross beam 202. Inside the locking seat 504, a locking bolt 510 passes through the slider 505 to fix the thrust mechanism to the front cross beam 201 and the rear cross beam 202. The locking seat 504 is horizontally attached to the thrust seat 501. Inside the thrust seat 501, there is a thrust screw sleeve 509. Inside the thrust screw sleeve 509, there is a lead screw 508. One end of the lead screw 508 extends out of the thrust screw sleeve 509 and abuts against the support leg 1, and the other end is provided with a large bevel gear 507. The large bevel gear 507 meshes with the small bevel gear 503. The upper part of the small bevel gear 503 passes through the thrust seat 501 and is connected to the rotary thrust hexagon 502.

[0044] Specifically, the rotary thrust hexagon 502 is fixedly connected to the small servo motor 511. The small servo motor 511 drives the rotary thrust hexagon 502 and the small bevel gear 503 to rotate. The small bevel gear 503 drives the large bevel gear 507, thereby driving the lead screw 508 to move in the thrust screw sleeve 509 along the thread direction, driving the support leg 1 to move in the left-right direction.

[0045] In summary, the present invention provides a control method for a precisely adjustable engine quick alignment device, which helps automotive engine testers quickly complete the alignment and precise adjustment of an automotive engine and a test bench. This method can improve the alignment efficiency of automotive engine testers when aligning an automotive engine with a test bench and extend the service life of the support legs.

[0046] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or any direct or indirect application in related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A control method for a precisely adjustable engine rapid centering device, Features: The following steps are involved: S1. According to the engine model, gantry, front and rear supports, and drive shaft type data, establish the front and rear support three-dimensional coordinate positioning table on the quick-install trolley; S2. Place the support legs at the pre-set coordinates according to the engine model, gantry, front and rear support forms, and drive shaft model of the corresponding test bench used for the engine test, so that the engine is initially positioned and the front and rear support legs are no longer moved forward and backward; S3. The laser alignment instrument measures the deviation between the engine's flywheel disc and the alignment base disc; S4. A small servo motor drives the support leg to move precisely through a thrust mechanism according to the deviation measured by a laser centering instrument, thereby completing the centering process between the engine and the test bench. A precisely adjustable engine rapid centering device comprises a support leg (1), a crossbeam (2) and a thrust mechanism (5), wherein the crossbeam (2) comprises a front crossbeam (201) and a rear crossbeam (202), and the thrust mechanism (5) comprises: a thrust seat (501), a rotating thrust hexagon (502), a small bevel gear (503), a locking seat (504), a slider (505), a locking head (506), a large bevel gear (507), a lead screw (508), a thrust screw sleeve (509), a locking bolt (510), and a small servo motor (511); the locking head (506) is fixed on the grooves of the front crossbeam (201) and the rear crossbeam (202). The locking seat (504) is in close contact with the front crossbeam (201) and the rear crossbeam (202); a locking bolt (510) is provided inside the locking seat (504) and passes through the slider (505) to fix the thrust mechanism on the front crossbeam (201) and the rear crossbeam (202); the locking seat (504) is in close contact with the thrust seat (501) in the horizontal direction; a thrust screw sleeve (509) is provided inside the thrust seat (501); a lead screw (508) is provided inside the thrust screw sleeve (509); one end of the lead screw (508) extends out of the thrust screw sleeve (509) to support the support leg (1), and the other end is provided with a large bevel gear (507); the large bevel gear (507) and the small bevel gear (503) are meshed with each other; the upper part of the small bevel gear (503) passes through the thrust seat (501) and is connected to the rotating thrust hexagon (502).

2. A control method for a precisely adjustable engine rapid centering device according to claim 1, Features: In step S1, the initial position of the three-dimensional coordinate positioning table is the longitudinal beam direction, the coordinate is the X direction, X0 represents the initial coordinate in the X direction toward the left front supporting leg side; the coordinate along the crossbeam direction is defined as the Y direction, Y0 represents the initial coordinate in the Y direction toward the left front supporting leg side; the Z direction represents the direction perpendicular to the horizontal plane of the crossbeam and the longitudinal beam, and Z0 represents the coordinate when the supporting leg is compressed to the shortest position.

3. A control method for a precisely adjustable engine rapid centering device according to claim 1, Features: In the step S3, the deviation between the engine flywheel disc measured by the laser alignment instrument and the basic alignment disc is the up-and-down deviation and the left-and-right deviation.

4. The control method of an engine rapid alignment device capable of precise adjustment according to claim 1, characterized in that: In the step S4, the small servo motor processes the up-and-down deviation measured by the laser alignment instrument, and needs to adjust the screw on the support leg for alignment in the up-and-down direction, and convert and adjust the rotation angle of the screw on each support leg one by one.

5. The control method of an engine rapid alignment device capable of precise adjustment according to claim 1, characterized in that: In the step S4, for the left-and-right deviation feedback by the laser alignment instrument, each support leg is precisely adjusted through the thrust mechanism installed on the cross beam of the support leg.

6. The control method of an engine rapid alignment device capable of precise adjustment according to claim 1, characterized in that: The rotary thrust hexagon (502) is fixedly connected to the small servo motor (511), and the small servo motor (511) drives the rotary thrust hexagon (502) and the small bevel gear (503) to rotate. The small bevel gear (503) drives the large bevel gear (507), thereby driving the lead screw (508) to move along the thread direction in the thrust nut sleeve (509), driving the support leg (1) to move in the left-and-right direction.

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