Press transmission synchronization adjustment structure and method

Abstract

The application belongs to the technical field of presses, and particularly relates to a press transmission synchronization adjusting structure, which comprises an upper cross beam, a transmission mechanism and an input mechanism. The transmission mechanism comprises two groups of transmission units, each group of transmission units comprising an intermediate gear shaft, a middle shaft gear, an eccentric gear and a guide column. One end of the intermediate gear shaft and one end of the middle shaft gear are connected through spline transmission to form a gear set structure, the gear set structure is rotationally arranged on the upper cross beam through a half tile cover, the middle shaft gear is an integral gear structure, the eccentric gear is rotationally arranged on the upper cross beam, the eccentric gear is in meshing transmission connection with the intermediate gear shaft, and the eccentric gear drives the guide column to move linearly along the guide sleeve on the upper cross beam. The input mechanism comprises a self-locking worm and gear mechanism and a driving mechanism for driving the self-locking worm and gear mechanism, the output end of the self-locking worm and gear mechanism is connected with an input shaft, and the input shaft is in meshing transmission connection with the middle shaft gear through gears. The application has simple structure, and the synchronization adjusting operation is more rapid and accurate.

Description

Technical Field

[0001] This application belongs to the field of press technology, and in particular relates to a press transmission synchronization adjustment structure and method. Background Technology

[0002] With the development of the domestic new energy vehicle industry, the market has placed higher demands on the stamping precision and manufacturing cycle of presses.

[0003] Synchronization of the transmission in a two-point (four-point) press is a key factor in the accuracy of the stamping process. Factors affecting the synchronization accuracy of the press transmission mainly include connecting rod point distance deviation, crank radius length deviation, crank angle phase deviation, and connecting rod length deviation. Among these, the most significant influencing factor is the crank angle phase deviation. Crank angle phase adjustment needs to be performed after final assembly with electrical, pneumatic, and hydraulic systems in place. A common adjustment method involves adjusting the gears of the separate inner and outer ring structures to temporarily fix the relative rotation angles of the inner and outer rings. Then, the gear shaft is pulled out axially, the gear is lifted out, machined, and a pin is inserted to fix the inner and outer rings, thus achieving the effect of adjusting the crank angle phase deviation. This adjustment operation is relatively complex. Summary of the Invention

[0004] To address the technical problem of complex crank angle phase adjustment operation in existing technologies, this application provides a synchronous adjustment structure and method for press transmission.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is a press transmission synchronous adjustment structure provided by the present invention, which includes an upper crossbeam, a transmission mechanism and an input mechanism;

[0006] The transmission mechanism includes two sets of transmission units. Each set of transmission units includes an intermediate gear shaft, a central shaft large gear, an eccentric gear, and a guide column. One end of the intermediate gear shaft and one end of the central shaft large gear are connected by a spline transmission to form a gear set structure. The gear set structure is rotatably mounted on the upper crossbeam via a half-shell cover. The central shaft large gear is an integral gear structure. The eccentric gear is rotatably mounted on the upper crossbeam. The eccentric gear is meshed with the intermediate gear shaft for transmission. The eccentric gear drives the guide column to move linearly along the guide sleeve on the upper crossbeam.

[0007] The input mechanism includes a self-locking worm gear mechanism and a drive mechanism for driving the self-locking worm gear mechanism. The output end of the self-locking worm gear mechanism is connected to the input shaft, and the input shaft is connected to the central shaft gear through gear meshing.

[0008] In some embodiments, the drive mechanism includes either a servo motor or a brake motor with an encoder mounted.

[0009] In some embodiments, one end of the intermediate gear shaft is an external spline, the inner hole of the central shaft large gear is an internal spline, and the external spline and the internal spline are connected by insertion.

[0010] In some embodiments, the end of the intermediate gear shaft away from the central gear is rotatably mounted on the upper crossbeam via the half-shell cover, and the end of the central gear close to the intermediate gear shaft is rotatably mounted on the upper crossbeam via the half-shell cover.

[0011] In some embodiments, the half-tile cover is fixed to the upper crossbeam by fixing bolts and nuts.

[0012] In some embodiments, the upper crossbeam is installed and fixed by a support fixture.

[0013] In some embodiments, one end of the connecting rod is rotatably mounted on the eccentric gear, and the other end is rotatably mounted on the guide post.

[0014] The present invention also provides a method for synchronizing the transmission of a press, which utilizes the above-mentioned mechanism for synchronizing the transmission of a press and includes the following steps:

[0015] S1. Adjust the upper crossbeam to be horizontal, start the input mechanism to make the eccentric gear rotate several times, turn off the power to the input mechanism, and stop the eccentric gear at the top dead center.

[0016] S2. Start the input mechanism, rotate the eccentric gear to 90°, measure the inclination angle between adjacent tooth slots of the eccentric gear in one set of transmission units, and record the measured angle value as A1. Measure the inclination angle between adjacent tooth slots at the corresponding position of the eccentric gear in another set of transmission units, and record the measured angle value as A2.

[0017] S3. Start the input mechanism and rotate the eccentric gear to 270°. Measure the inclination angle between adjacent tooth slots of the eccentric gear in one transmission unit and record the measured angle value as A3. Measure the inclination angle between adjacent tooth slots at the corresponding position of the eccentric gear in another transmission unit and record the measured angle value as A4.

[0018] S4. Calculate the differences between A1 and A2, and A3 and A4 respectively, and record the maximum difference as A; if A meets the requirements, no adjustment is needed, otherwise proceed to S5;

[0019] S5. Convert the difference A into the angle D of the eccentric gear. Remove the half-shell cover from the gear set structure of one of the transmission units, take out the gear set structure as a whole, and disconnect the spline connection between the intermediate gear shaft and the central shaft large gear of the removed gear set structure. Rotate the intermediate gear shaft by B teeth and rotate the central shaft large gear by C teeth, so that the value of (B*360 / Z3-C*360 / Z2) / (Z4 / Z3) is closest to the angle D. After rotating the intermediate gear shaft and the central shaft large gear according to the corresponding number of teeth, spline them to form a gear set structure, assemble it as a whole on the upper crossbeam, and install the half-shell cover. Where Z2 is the number of spline teeth in the central shaft large gear, Z3 is the number of teeth in the intermediate gear shaft, and Z4 is the number of teeth in the eccentric gear.

[0020] S6. Repeat S1~S4 until A meets the requirements.

[0021] In some embodiments, the method for measuring the inclination angle between adjacent tooth slots of the eccentric gear is to place two measuring rods in the adjacent tooth slots of the eccentric gear, place the inclination meter on the two measuring rods, and read the angle value.

[0022] In some embodiments, the adjacent tooth grooves are two adjacent tooth grooves located at the highest point of the eccentric gear.

[0023] Beneficial effects: 1. The self-locking worm gear mechanism structure only requires a low-power servo motor or brake motor and a large transmission ratio of the self-locking worm gear mechanism to continuously and stably drive the press transmission mechanism. Compared with using a crane or jack for driving, it can effectively eliminate the spatial gaps between shaft holes and moving pairs during assembly, making the mechanism clearance more stable and improving the accuracy of synchronous measurement data.

[0024] 2. It adopts a self-locking worm gear mechanism structure. Through signal feedback from the servo motor or the brake motor with an encoder, when multiple sets of data need to be measured at the same position, the eccentric gear can be stopped precisely at a specific angle, effectively reducing the adjustment time for the stopping angle and improving the efficiency of synchronous measurement.

[0025] 3. The self-locking worm gear mechanism, through the braking of the servo motor or the self-locking characteristics of the brake motor and the worm gear, ensures full meshing of the gears in the rotational direction when the press transmission mechanism stops, preventing gear backlash and reducing the impact of tooth backlash on synchronous measurement data. This improves the accuracy of synchronous measurement data.

[0026] 4. The intermediate gear shaft is fixed by a semi-sleeve cover, which allows for quick assembly and disassembly. The intermediate gear shaft and the large gear on the central shaft are hoisted as a whole. Compared with the operation of first axially disassembling the intermediate gear shaft and then hoisting the large gear on the central shaft, the efficiency of synchronous adjustment is improved.

[0027] 5. The intermediate gear shaft and the large gear on the central shaft are connected by a spline. Simply rotating the splined teeth of the intermediate gear shaft and the large gear on the central shaft relative to each other is sufficient to reduce the crankshaft rotation phase deviation. This eliminates the need to rotate the inner and outer rings of the gears and then machine pins for fixation, thus reducing synchronization adjustment time.

[0028] 6. The large gear on the central shaft is a one-piece gear structure, which is simpler to manufacture and more economical compared to a gear with separate inner and outer rings. The one-piece gear structure eliminates the clearance between the inner and outer rings, resulting in higher precision.

[0029] 7. This invention adjusts the spline connection between the intermediate gear shaft and the central shaft large gear by measuring the difference in the inclination angle between adjacent tooth grooves of the eccentric gear under different conditions, which is faster and more accurate. Attached Figure Description

[0030] Figure 1 A cross-sectional view of the synchronous adjustment structure of the press drive;

[0031] Figure 2 This is a partial structural diagram of the synchronous adjustment structure for the press drive.

[0032] Figure 3 This is a schematic diagram of the connection structure between the input mechanism and the upper crossbeam;

[0033] Figure 4 This is a schematic diagram of the tilt angle measurement structure;

[0034] In the diagram: 1. Upper crossbeam, 2. Support fixture, 3. Eccentric gear, 4. Intermediate gear shaft, 5. Central shaft large gear, 6. Half-blade cover, 7. Fixing bolt, 8. Nut, 9. Self-locking worm gear mechanism, 10. Input shaft, 11. Connecting rod, 12. Guide sleeve, 13. Guide post, 14. Measuring bar, 15. Inclinometer.

[0035] As shown in the picture. Detailed Implementation

[0036] The present application will be further described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative changes are within the protection scope of the present application.

[0037] The present invention provides a synchronous adjustment structure for a press transmission, comprising an upper crossbeam 1, a transmission mechanism, and an input mechanism;

[0038] like Figure 1 and 2As shown, the transmission mechanism includes two sets of transmission units. Each set of transmission units includes an intermediate gear shaft 4, a central large gear 5, an eccentric gear 3, and a guide post 13. One end of the intermediate gear shaft 4 and one end of the central large gear 5 are connected by a spline transmission to form a gear set structure. The gear set structure is rotatably mounted on the upper crossbeam 1 via a half-shell cover 6. The central large gear 5 is an integral gear structure. The eccentric gear 3 is rotatably mounted on the upper crossbeam 1. The eccentric gear 3 meshes with the intermediate gear shaft 4 for transmission. The eccentric gear 3 drives the guide post 13 to move linearly along the guide sleeve 12 on the upper crossbeam 1. Figure 3 As shown, the input mechanism includes a self-locking worm gear mechanism 9 and a drive mechanism for driving the self-locking worm gear mechanism 9. The output end of the self-locking worm gear mechanism 9 is connected to the input shaft 10, and the input shaft 10 is connected to the central shaft gear 5 through gear meshing. Specifically, in some embodiments, the drive mechanism is either a servo motor with signal feedback function or a brake motor with an encoder installed. Two sets of transmission units are symmetrically arranged on the upper crossbeam 1, and the central shaft gears 5 of the two sets of transmission units mesh synchronously.

[0039] With the above structure, the drive mechanism drives the worm gear mechanism to move, which in turn drives the input shaft 10 to rotate. The input shaft 10 drives the central shaft gear 5 to rotate. Since the central shaft gear 5 and the intermediate gear shaft 4 are connected by a spline, the intermediate gear shaft 4 rotates with the central shaft gear 5. The intermediate gear shaft 4 drives the eccentric gear 3 to rotate. The rotation of the eccentric gear 3 drives the guide column 13 to move linearly within the guide sleeve 12 of the upper crossbeam 1, thereby providing power to the press. In this structure, the intermediate gear shaft 4 and the central shaft gear 5 are splined to form a gear set structure. The whole assembly is mounted on the crossbeam by a half-shell cover 6. When adjustment is needed later, the intermediate gear shaft 4 and the central shaft gear 5 can be removed as a whole by removing the half-shell cover 6, making adjustment more convenient and quick. In addition, the self-locking worm gear mechanism 9 used in this application can eliminate the space gap between the shaft hole and the moving pair during the assembly process, making the mechanism clearance more stable and improving the stability of synchronous measurement data. When the press transmission mechanism stops, ensure that the gears are fully meshed in the direction of rotation to prevent gear backlash, reduce the impact of tooth backlash on synchronous measurement data, and improve the accuracy of the measurement data. A servo motor with signal feedback function or a brake motor with an encoder is used as the drive mechanism. Simultaneously, a self-locking worm gear mechanism 9 is employed. When multiple sets of data need to be measured at the same position, the eccentric gear 3 can be precisely stopped at a specific angle, effectively reducing the adjustment time for the stopping angle and improving synchronous measurement efficiency. The intermediate gear shaft 4 and the large gear 5 of the central shaft are connected by splines. Only relative rotation of the splines of the intermediate gear shaft 4 and the large gear 5 of the central shaft is needed to reduce the crankshaft angle phase deviation. It is not necessary to rotate the inner and outer rings of the gear and then machine a pin for fixation. This reduces synchronous adjustment time. The large gear 5 of the central shaft is an integral gear structure, which is simpler to manufacture and more economical than a gear with separate inner and outer rings. The integral gear structure eliminates the fit clearance between the inner and outer rings of the gear, resulting in better precision.

[0040] Specifically, in some embodiments, one end of the intermediate gear shaft 4 is an external spline, the inner hole of the central shaft large gear 5 is an internal spline, and the external spline and the internal spline are connected by insertion.

[0041] To ensure the installation stability of the gear set structure, in some embodiments, the end of the intermediate gear shaft 4 away from the central shaft large gear 5 is rotatably mounted on the upper crossbeam 1 via the half-shell cover 6, and the end of the central shaft large gear 5 close to the intermediate gear shaft 4 is rotatably mounted on the upper crossbeam 1 via the half-shell cover 6.

[0042] like Figure 2 As shown, specifically, in some embodiments, the half-tile cover 6 is fixed to the upper crossbeam 1 by fixing bolts 7 and nuts 8. The connection method of fixing bolts 7 and nuts 8 is simple in structure and easy to assemble and disassemble.

[0043] like Figure 1As shown, in order to facilitate the adjustment of the level of the upper crossbeam 1, in some embodiments, the upper crossbeam 1 is installed and fixed by a support fixture 2.

[0044] like Figure 1 As shown, specifically, in some embodiments, one end of the connecting rod 11 is rotatably mounted on the eccentric gear 3, and the other end is rotatably mounted on the guide post 13. The rotation of the eccentric gear drives the connecting rod 11 to swing, and the swing of the connecting rod 11 drives the guide post 13 to move linearly within the guide sleeve 12.

[0045] The present invention also provides a method for adjusting the synchronous adjustment of a press drive using the above-mentioned press drive synchronous adjustment mechanism, comprising the following steps:

[0046] S1. Adjust the upper crossbeam 1 to be horizontal, start the input mechanism to make the eccentric gear 3 rotate several times, turn off the power to the input mechanism, and stop the eccentric gear 3 at the top dead center.

[0047] S2. Start the input mechanism, rotate the eccentric gear 3 to 90°, measure the inclination angle between adjacent tooth slots of the eccentric gear 3 in one transmission unit, and record the measured angle value as A1. Measure the inclination angle between adjacent tooth slots at the corresponding position of the eccentric gear 3 in another transmission unit, and record the measured angle value as A2.

[0048] S3. Start the input mechanism and rotate the eccentric gear 3 to 270°. Measure the inclination angle between adjacent tooth slots of the eccentric gear 3 in one transmission unit and record the measured angle value as A3. Measure the inclination angle between adjacent tooth slots at the corresponding position of the eccentric gear 3 in another transmission unit and record the measured angle value as A4.

[0049] like Figure 4 As shown, the specific measurement method of the inclination angle in S2 and S3 is as follows: place two measuring rods 14 in two adjacent tooth grooves at the highest point of the eccentric gear 3, place the inclination meter 15 on the two measuring rods 14, and read the angle value.

[0050] S4. Calculate the differences between A1 and A2, and A3 and A4 respectively, and record the maximum difference as A; if A meets the requirements, no adjustment is needed, otherwise proceed to S5;

[0051] S5. Convert the difference A into the angle D of the eccentric gear 3 (A=D), remove the half-shell cover 6 on the gear set structure of one of the transmission units, take out the gear set structure as a whole, and disconnect the spline connection between the intermediate gear shaft 4 and the central shaft large gear 5 of the removed gear set structure; rotate the intermediate gear shaft 4 by B teeth and rotate the central shaft large gear 5 by C teeth, so that the value of (B*360 / Z3-C*360 / Z2) / (Z4 / Z3) is closest to the angle D; after rotating the intermediate gear shaft 4 and the central shaft large gear 5 according to the corresponding number of teeth, spline them to form a gear set structure, and assemble it as a whole on the upper crossbeam 1, and install the half-shell cover 6; where Z2 is the number of spline teeth in the central shaft large gear 5, Z3 is the number of teeth in the intermediate gear shaft 4, and Z4 is the number of teeth in the eccentric gear 3;

[0052] S6. Repeat S1~S4 until A meets the requirements, then the adjustment of crank angle phase deviation is completed.

[0053] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this application.

Claims

1. A synchronous adjustment structure for a press transmission, characterized in that, Includes the upper crossbeam (1), transmission mechanism and input mechanism; The transmission mechanism includes two sets of transmission units. Each set of transmission units includes an intermediate gear shaft (4), a central shaft large gear (5), an eccentric gear (3), and a guide column (13). One end of the intermediate gear shaft (4) and one end of the central shaft large gear (5) are connected by a spline transmission to form a gear set structure. The gear set structure is rotatably mounted on the upper crossbeam (1) through a half-sleeve cover (6). The central shaft large gear (5) is an integral gear structure. The eccentric gear (3) is rotatably mounted on the upper crossbeam (1). The eccentric gear (3) is meshed with the intermediate gear shaft (4) for transmission. The eccentric gear (3) drives the guide column (13) to move linearly along the guide sleeve (12) on the upper crossbeam (1). The input mechanism includes a self-locking worm gear mechanism (9) and a drive mechanism for driving the self-locking worm gear mechanism (9). The output end of the self-locking worm gear mechanism (9) is connected to the input shaft (10). The input shaft (10) is connected to the central shaft gear (5) through gear meshing.

2. The press transmission synchronous adjustment structure according to claim 1, characterized in that, The drive mechanism includes either a servo motor or a brake motor with an encoder mounted on it.

3. The press transmission synchronization adjustment mechanism according to claim 1 or 2, characterized in that, One end of the intermediate gear shaft (4) is an external spline, and the inner hole of the central shaft gear (5) is an internal spline. The external spline and the internal spline are connected by insertion.

4. The press transmission synchronization adjustment mechanism according to claim 3, characterized in that, The end of the intermediate gear shaft (4) away from the central shaft large gear (5) is rotatably mounted on the upper crossbeam (1) through the half-slab cover (6), and the end of the central shaft large gear (5) close to the intermediate gear shaft (4) is rotatably mounted on the upper crossbeam (1) through the half-slab cover (6).

5. The pressure transmission synchronous adjustment mechanism according to claim 1, characterized in that, The half-tile cover (6) is fixed to the upper crossbeam (1) by fixing bolts (7) and nuts (8).

6. The press transmission synchronization adjustment mechanism according to claim 1, characterized in that, The upper crossbeam (1) is installed and fixed by a support fixture (2).

7. The press transmission synchronization adjustment mechanism according to claim 1, characterized in that, One end of the connecting rod (11) is rotatably mounted on the eccentric gear (3), and the other end is rotatably mounted on the guide post (13).

8. A method for synchronous adjustment of a press transmission, characterized in that, The press transmission synchronization adjustment mechanism according to any one of claims 1 to 7 includes the following steps: S1. Adjust the upper crossbeam (1) to be horizontal, start the input mechanism to make the eccentric gear (3) rotate several times, turn off the power of the input mechanism, and stop the eccentric gear (3) at the top dead center. S2. Start the input mechanism and rotate the eccentric gear (3) to 90°. Measure the inclination angle between adjacent tooth slots of the eccentric gear (3) of a set of transmission units and record the measured angle value as A1. Measure the inclination angle between adjacent tooth slots at the corresponding position of the eccentric gear (3) of another set of transmission units and record the measured angle value as A2. S3. Start the input mechanism and rotate the eccentric gear (3) to 270°. Measure the inclination angle between adjacent tooth slots of the eccentric gear (3) of a set of transmission units and record the measured angle value as A3. Measure the inclination angle between adjacent tooth slots at the corresponding position of the eccentric gear (3) of another set of transmission units and record the measured angle value as A4. S4. Calculate the differences between A1 and A2, and A3 and A4 respectively, and record the maximum difference as A; if A meets the requirements, no adjustment is needed, otherwise proceed to S5; S5. Convert the difference A into the angle D of the eccentric gear (3), remove the half-shell cover (6) on the gear set structure of one of the transmission units, take out the gear set structure as a whole, and disconnect the spline connection between the intermediate gear shaft (4) and the central shaft large gear (5) of the removed gear set structure; rotate the intermediate gear shaft (4) by B teeth, and rotate the central shaft large gear (5) by C teeth, so that the value of (B*360 / Z3-C*360 / Z2) / (Z4 / Z3) is closest to the angle D; after rotating the intermediate gear shaft (4) and the central shaft large gear (5) according to the corresponding number of teeth, spline connect them to form a gear set structure, and assemble it as a whole on the upper crossbeam (1), and install the half-shell cover (6); where Z2 is the number of spline teeth in the central shaft large gear (5), Z3 is the number of teeth in the intermediate gear shaft (4), and Z4 is the number of teeth in the eccentric gear (3); S6. Repeat S1~S4 until A meets the requirements.

9. The method according to claim 8, characterized in that, The method for measuring the inclination angle between adjacent tooth slots of the eccentric gear (3) is as follows: place two measuring rods (14) in adjacent tooth slots of the eccentric gear (3), place the inclination meter (15) on the two measuring rods (14), and read the angle value.

10. The method according to claim 8 or 9, characterized in that, The adjacent tooth grooves are two adjacent tooth grooves located at the highest point of the eccentric gear (3).

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