Piezoelectric compensation center distance and axis deviation adjustable gearbox

Abstract

The invention provides a piezoelectric compensation center distance and axis deviation adjustable gearbox, an upper box body and a lower box body are connected and provide installation positions for a sliding bearing and a piezoelectric compensation adjusting mechanism, and the sliding bearing and the piezoelectric compensation adjusting mechanism are installed between the upper box body and the lower box body and used for providing support for a shaft of a gear assembly. The gear assembly comprises a pair of gears and a transmission shaft; the piezoelectric compensation adjusting mechanism comprises an eccentric sliding bearing and a piezoelectric-driven wedge and provides up-down and left-right movement for a shaft of the gear assembly. The sliding bearing, the piezoelectric compensation adjusting mechanism and the tightening bolt are symmetrically arranged in the gear box; the two shafts of the gear assembly, namely the driving shaft and the driven shaft, can be supported by the piezoelectric compensation adjusting mechanism independently or simultaneously. The eccentric and tapered wedge combined design is adopted, accurate adjustment can be completed under the condition that a gear box is not disassembled in a large range, adjustment is convenient, operation is easy, parts are easy to manufacture and assemble, and the problems that in the prior art, the gear center distance and the axis deviation cannot be adjusted at the same time, and adjustment on the axis deviation is inaccurate are solved.

Description

Technical Field

[0001] The present invention belongs to the field of gear transmission, and particularly relates to a gearbox with adjustable center distance and axis deviation compensated by piezoelectricity. Background Art

[0002] Gear transmission systems have many advantages such as stable transmission ratio, high transmission efficiency, and large transmission torque, and are widely used in high-tech industrial fields such as aerospace, ships, and automobiles. For large-scale heavy-duty gear transmission systems, such as ship gearboxes, wide helical gears and sliding bearings are mostly used to support heavy loads. Working in high-power heavy-duty situations for a long time, the gearbox housing and various components will undergo a certain degree of deformation, resulting in changes in the center distance and axis of the gears, changing the motion state of the gears, and thus affecting the transmission performance of the gearbox. At the same time, the deviations caused by the changes in the center distance and axis will generate helical gear meshing deviations, which will greatly accelerate the wear of the gear tooth surfaces. The axis skew will also cause the oil film thickness between the transmission shaft and the sliding bearing to be uneven, resulting in wear or jamming of the gear shaft or sliding bearing, greatly reducing the service life of the gearbox. Therefore, during the service life cycle of the gearbox, it is often necessary to stop the machine and adjust and correct it multiple times to ensure the normal operation of the gear system.

[0003] There are mainly three existing methods for adjusting the center distance and axis deviation of gearboxes: the shim method, the wedge method, and the eccentric method:

[0004] The shim method compensates for the deviation of the center distance of gear transmission and the axis skew by adding or subtracting adjustment shims in the up, down, left, and right directions of the bearing housing. The shim method has a simple structure, does not require complex mechanism design, and is stable after adjustment. It is currently widely used in industry.

[0005] The wedge method compensates for the axis deviation of the gear by adding multiple wedges at the connection between the gear and the transmission shaft. By adjusting the precession displacement of the wedges, the rotational axis of the gear can swing within a certain range to correct the axis skew, and the gear is fixed by bolts. The wedge method can achieve axis skew compensation within a certain range, with high precision and good continuity.

[0006] The eccentric method is achieved by installing an eccentric sleeve between the bearing and the bearing housing. Eccentric sleeves are installed at both ends of the same gear transmission shaft. By rotating the eccentric sleeves, the center distance and axis skew of the gear transmission can be adjusted. The eccentric method does not require frequent disassembly and assembly of the gearbox. Only the rotation angle of the eccentric sleeve needs to be calculated according to the adjustment amount to meet the adjustment requirements of different deviations of the gearbox. It has the advantages of continuous adjustment range, simple adjustment, convenient operation, and high stability. The eccentric method can adjust the center distance deviation by synchronously adjusting the rotation angles of the two eccentric sleeves at both ends of the gear shaft.

[0007] The prior art is like the patent "A Gear Test Box with Adjustable Center Distance", application number 2022104068671. The gear test box includes a gear box housing, and the gear box housing is provided with at least two circular hole structures; a center distance adjustment disc, which is installed in one of the circular hole structures, and the center distance adjustment disc is provided with a bearing seat mounting hole, and the bearing seat mounting hole is eccentrically arranged with respect to the center of the center distance adjustment disc; various specifications of gear shafts are installed in the other circular hole structure on the gear box housing and the bearing seat mounting hole of the center distance adjustment disc through bearings and bearing seats, and the distance between the other circular hole structure and the bearing seat mounting hole is adjusted by adjusting the angular position of the center distance adjustment disc installed on the gear box housing, so as to realize the adjustment of the center distance between the two gear shafts. The gear test box disclosed in this patent can conduct gear shaft tests with various center distances and spans, which can reduce the cost of machining multiple sets of gear boxes for tests and improve the test efficiency.

[0008] The prior art is to achieve a large range of adjustment of the center distance to meet the experimental research of gear systems with different center distances. This technology uses the eccentric method to adjust the center distance of the gear box, and the center distance adjustment disc is an eccentric structure. The main disadvantage of this adjustment device is that it cannot adjust the center distance and axis deviation of the test gear box simultaneously, and can only accurately adjust the center distance alone. This is because the prior art only relies on the eccentric device to adjust. When adjusting the axis deviation, the eccentric device generates angular rotation, and the positions in the two radial directions inevitably produce linkage. Thus, when adjusted in place in one direction, it is inevitable that the required adjustment amount cannot be achieved in the other direction, resulting in inaccurate adjustment.

[0009] Therefore, it is necessary to specifically develop a new type of gear box with adjustable center distance and axis deviation to overcome the problems in the prior art that the center distance and axis deviation of the gear cannot be adjusted simultaneously and the adjustment of the axis deviation is inaccurate. Summary of the Invention

[0010] Object of the Invention: Aiming at the deficiencies and defects of the prior art, the present invention provides a gear box with adjustable center distance and axis deviation compensated by piezoelectricity. This gear box adopts a combined design of eccentricity and wedge, which can complete precise adjustment without a large-scale disassembly of the gear box. The adjustment is convenient, the operation is simple, and the parts are easy to manufacture and assemble, overcoming the problems in the prior art that the center distance and axis deviation of the gear cannot be adjusted simultaneously and the adjustment of the axis deviation is inaccurate; the position of the gear shaft is precisely adjusted through an eccentric sliding bearing and a wedge compensated by piezoelectric drive, making up for the defect that it is difficult to adjust in place by the eccentric method, which can meet the relationship tests of multiple performances and errors of the gear box, and can also be used for the adjustment of the center distance and axis deviation of the gear due to long-term operation in engineering practice.

[0011] Technical solution: A gearbox with adjustable center distance and axis deviation by piezoelectric compensation according to the present invention is characterized in that it includes an upper box body, a lower box body, a sliding bearing, a piezoelectric compensation adjustment mechanism, a gear assembly and a tightening bolt; the upper box body is connected to the lower box body and provides an installation position for the sliding bearing and the piezoelectric compensation adjustment mechanism, and the sliding bearing and the piezoelectric compensation adjustment mechanism are installed between the upper box body and the lower box body to provide support for the shaft of the gear assembly. The gear assembly includes a pair of gears and a transmission shaft; the piezoelectric compensation adjustment mechanism includes an eccentric sliding bearing and a piezoelectric-driven wedge to provide up, down, left and right movement for the shaft of the gear assembly; the sliding bearing, the piezoelectric compensation adjustment mechanism and the tightening bolt are symmetrically arranged in the gearbox; the two shafts of the gear assembly, namely the driving shaft and the driven shaft, can be supported by the piezoelectric compensation adjustment mechanism separately or simultaneously.

[0012] Among them, rectangular installation spaces are provided at corresponding positions on both sides of the upper box body to provide movement space for the piezoelectric compensation adjustment mechanism; threaded holes are provided at corresponding positions on both sides of the upper box body for installing tightening screws, and the tightening screws are used to press the piezoelectric compensation adjustment mechanism.

[0013] Among them, two rectangular installation spaces are symmetrically distributed on the lower box body. Vertical grooves are provided on both sides of the space, and a horizontal groove is provided at the bottom for the positioning and installation of the piezoelectric compensation adjustment mechanism to ensure the up and down movement of the bearing seat and the horizontal movement of the wedge.

[0014] Among them, the piezoelectric compensation adjustment mechanism includes an upper half bearing seat, a lower half bearing seat, a wedge, an eccentric sliding bearing and a piezoelectric push rod; the piezoelectric compensation adjustment mechanism is integrally installed between the upper box body and the lower box body to support a shaft of the gear assembly and realize error adjustment.

[0015] Among them, the upper half bearing seat and the lower half bearing seat are installed up and down, and are positioned and fastened by pins and bolts on both sides; the eccentric sliding bearing is installed between the upper half bearing seat and the lower half bearing seat. The outer circle and the inner circle of the eccentric sliding bearing are eccentric structures with different centers, and the lateral adjustment is realized by the rotation of the eccentric sliding bearing.

[0016] Among them, a number of threaded holes are circumferentially distributed on the inner step end faces of the upper half bearing seat and the lower half bearing seat, and the threaded holes should be evenly distributed for fixing the eccentric sliding bearing at any position; the eccentric sliding bearing is provided with a concave step, which cooperates with the convex platforms inside the upper half bearing seat and the lower half bearing seat; a number of arc-shaped grooves are evenly opened on one end face of the eccentric sliding bearing, and the distribution center of the grooves coincides with the distribution center of the threaded holes of the bearing seat, and the width of the grooves corresponds to the diameter of the corresponding bolt holes.

[0017] Among them, at least two threaded holes should be completely exposed by the arc-shaped grooves to ensure that there are more than two screws fastening the upper half bearing seat and the lower half bearing seat.

[0018] Among them, the bottom of the lower bearing housing is an inclined surface for freely sliding in cooperation with the inclined surface at the top of the wedge. Vertical bosses protrude from both sides for axial positioning and ensuring vertical movement in the vertical installation groove of the lower box body. The wedge is installed below the lower bearing housing, with a horizontal boss at the bottom for axial positioning and ensuring horizontal movement in the horizontal installation groove of the lower box body. Round holes are provided on both sides for installing piezoelectric push rods. By externally controlling the piezoelectric push rods to drive the wedge to move, longitudinal error compensation adjustment is achieved.

[0019] Among them, the upper box body and the lower box body are connected by bolts.

[0020] The gearbox with adjustable center distance and axis deviation by piezoelectric compensation of the present invention is characterized in that during use, it includes the following steps:

[0021] 1) According to the measurement results, calculate the deviation amount of the gear axis from the reference.

[0022] 2) Determine the lateral and longitudinal adjustment amounts at both ends of the adjustable shaft.

[0023] 3) According to the lateral adjustment amount, calculate the rotation angles of the eccentric sliding bearings on both sides under the current eccentricity of the eccentric sliding bearings.

[0024] 4) According to the current lateral adjustment amount, calculate the longitudinal overshoot or deficiency amounts on both sides after the eccentric sliding bearings rotate in place, and then calculate the longitudinal adjustment amount to be compensated.

[0025] 5) Loosen all the fastening screws of the eccentric sliding bearings, rotate the eccentric sliding bearings to the corresponding scale using a wrench according to the calculated angle, and select a suitable position to tighten the fastening screws in the grooves of the eccentric sliding bearings and the threaded holes of the bearing housing.

[0026] 6) Loosen the tensioning bolts. According to the calculated longitudinal compensation adjustment amount, control the piezoelectric push rods through the corresponding voltage to make the wedge move, pushing the bearing housing up and down to meet the longitudinal adjustment amount. After adjustment, tighten the tensioning bolts.

[0027] 7) After the adjustment is completed, test and verify the adjustment results.

[0028] Compared with the prior art, the present invention has the following remarkable advantages:

[0029] The present invention is oriented towards the adjustment of different gear axis errors and can be used to conduct various gear system tests under different errors, such as tooth root stress tests, transmission error tests, gear vibration tests, etc. It can also be applied to engineering practice, facilitating the deviation adjustment of gearboxes after long-term operation, and has a wide range of applications. Since the present invention adopts a combination of the eccentric method and the wedge method, it overcomes the defects of excessive or insufficient adjustment in a certain direction of the eccentric method. The lateral error can be adjusted by rotating the eccentric sliding bearing, and then the longitudinal error can be compensated and adjusted by pushing the wedge with a piezoelectric push rod, achieving precise adjustability of errors in both directions. At the same time, the center distance and axis deflection angle can be jointly adjusted to meet the requirements of multiple application scenarios.

[0030] The eccentric bearing of the present invention can rotate in any direction within the bearing housing. By calculating the relationship between the rotation angle and the lateral adjustment amount, the angle to be rotated is determined. After angle calibration and scaling of the eccentric bearing, the lateral adjustment can be conveniently achieved through an external wrench; in addition, through the design of the arc-shaped groove and the distribution of circumferential threaded holes, fastening at any angle can be realized, and the lateral adjustment amount can be precisely maintained. Compared with other adjustable gearboxes, the present invention realizes the compensation and adjustment of the longitudinal error by pushing the wedge to move left and right with a piezoelectric push rod. Only after the lateral error of the eccentric bearing is adjusted, calculate the longitudinal error to determine the compensation amount, unscrew the tightening screw, control the precise movement of the wedge by controlling the voltage of the piezoelectric push rod, and after the adjustment is completed, tighten the tightening screw to ensure the maintenance of the longitudinal adjustment amount through the self-locking of the wedge and the voltage of the piezoelectric push rod.

[0031] During the adjustment process of the lateral and longitudinal errors of the present invention, it is not necessary to disassemble the gearbox significantly. The entire adjustment process only requires externally rotating the eccentric bearing and externally controlling the piezoelectric push rod, avoiding other installation errors caused by adjusting a certain direction variable, with convenient operation, accurate adjustment, and strong practicability. The present invention can be adjusted for different error types and error ranges by designing the eccentricity of the eccentric bearing and the angle of the wedge according to different adjustment amount requirements, with strong designability and a wide adjustment range. The structure of the present invention is simple and reliable, only requiring simple installation of parts, and some can use standard parts, with the advantages of simple manufacturing, convenient installation, and small error introduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of the present invention;

[0033] Figure 2 is a schematic structural diagram of the lower housing of the present invention;

[0034] Figure 3 is a schematic structural diagram of the piezoelectric compensation adjustment mechanism of the present invention;

[0035] Figure 4 is a schematic structural diagram of the bearing housing of the present invention;

[0036] Figure 5 Structural schematic diagram of the eccentric bearing of the present invention;

[0037] Figure 6 Installation structural schematic diagram of the wedge and the piezoelectric push rod of the present invention;

[0038] In the figure, 1 is the upper box body; 2 is the lower box body; 3 is the sliding bearing; 4 is the piezoelectric compensation adjustment mechanism; 401 is the upper half bearing seat; 402 is the lower half bearing seat; 403 is the wedge; 404 is the eccentric sliding bearing; 405 is the piezoelectric push rod; 5 is the gear assembly; 6 is the tightening bolt. Specific embodiments

[0039] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] As Figure 1 shown, the gearbox with adjustable center distance and axis deviation for piezoelectric compensation of the present invention includes an upper box body 1, a lower box body 2, a sliding bearing 3, a piezoelectric compensation adjustment mechanism 4, a gear assembly 5, and a tightening bolt 6. The upper box body 1 and the lower box body 2 are bolted together up and down in the general sense of a gearbox (using existing technology), providing installation positions for the sliding bearing 3 and the piezoelectric compensation adjustment mechanism 4. The sliding bearing 3 is a sliding bearing in the general sense of engineering, with various structures, and is installed between the bearing seats of the upper and lower box bodies, used to provide support for a shaft of the gear assembly 5. The gear assembly 5 is assembled from a pair of gears and a transmission shaft in the general sense of engineering, and the types of gears can be various. The sliding bearing 3, the piezoelectric compensation adjustment mechanism 4, and the tightening bolt 6 are symmetrically arranged inside the gearbox. Particularly, the two shafts of the gear assembly 5 can be supported by the piezoelectric compensation adjustment mechanism arbitrarily, either the driving shaft or the driven shaft, or both can be used at the same time, Figure 1 which is only one of the embodiments.

[0041] As Figure 2 shown, two rectangular installation spaces are symmetrically distributed on the lower box body 2. Vertical grooves are opened on both sides of this space, and a horizontal groove is opened at the bottom, used for positioning and installing the piezoelectric compensation adjustment mechanism 4 to ensure the up and down movement of the bearing seat and the horizontal movement of the wedge 403. Rectangular installation spaces are opened at the corresponding positions on both sides of the upper box body 1, used to provide movement space for the piezoelectric compensation adjustment mechanism 4, and threaded holes are opened at the corresponding positions, used to install the tightening screw 6. The tightening screw 6 is used to press the piezoelectric compensation adjustment mechanism 4.

[0042] The piezoelectric compensation adjustment mechanism 4, as Figure 3As shown, it includes an upper half bearing housing 401, a lower half bearing housing 402, a wedge 403, an eccentric sliding bearing 404, and a piezoelectric push rod 405. The piezoelectric compensation adjustment mechanism 4 is integrally installed between the upper box body 1 and the lower box body 2 to support a shaft of the gear assembly 5 and achieve error adjustment. The upper half bearing housing 401 and the lower half bearing housing 402 are installed up and down, as Figure 4 shown, and are positioned and fastened by pins and bolts on both sides (using existing technology) to ensure the fitting accuracy. The eccentric sliding bearing 404 is installed between the upper half bearing housing 401 and the lower half bearing housing 402. The eccentric sliding bearing 404, as Figure 5 shown, has a non-concentric outer circle and inner circle, with a small eccentricity, and the eccentricity can be designed according to requirements. The lateral adjustment is achieved through the rotation of the eccentric sliding bearing 404; further, by calculating the relationship between the adjustment amount and the rotation angle, the eccentric sliding bearing can be calibrated and scaled, making the implementation more convenient through the rotation scale.

[0043] Specifically, as Figure 4 shown, the upper half bearing housing 401 and the lower half bearing housing 402 are circumferentially distributed with a number of threaded holes on the inner step end face, and the threaded holes should be evenly distributed to fix the eccentric sliding bearing 404 at any position. The eccentric sliding bearing 404 is designed with a concave step to cooperate with the convex platforms inside the upper half bearing housing 401 and the lower half bearing housing 402; on one end face of the eccentric sliding bearing 404, a number of arc-shaped grooves are evenly opened, the distribution center of the grooves coincides with the distribution center of the threaded holes of the bearing housing, and the width of the grooves should be designed according to the diameter of the corresponding bolt holes.

[0044] Preferably, the arc-shaped grooves should be able to completely expose at least two threaded holes, which can ensure that there are always more than two screws fastening on the upper half bearing housing 401 and the lower half bearing housing 402, avoiding deviation or detachment caused by loose fastening.

[0045] Further, the bottom of the lower half bearing housing 402 is a slope to cooperate with the slope at the top of the wedge 403 to achieve free sliding. Vertical bosses protrude on both sides for axial positioning and ensuring its up and down movement in the vertical installation groove of the lower box body 2; the wedge 403 is installed below the lower half bearing housing, as Figure 2 shown, with a horizontal boss at the bottom for axial positioning and ensuring its horizontal movement in the horizontal installation groove of the lower box body 2, and circular holes are provided on both sides for installing the piezoelectric push rod 405, as Figure 6 shown, and the piezoelectric push rod 405 is pushed by external control to move the wedge 403 to achieve the compensation adjustment of the longitudinal error.

[0046] For a specific embodiment, if the adjustment of the gear axis deviation and the center distance deviation is respectively achieved, the steps are as follows:

[0047] Step 1: Calculate the deviation of the gear axis from the reference according to the measurement results.

[0048] Step 2: Determine the lateral and longitudinal adjustment amounts at both ends of the adjustable shaft.

[0049] Step 3: According to the lateral adjustment amount, calculate the rotation angles of the eccentric sliding bearings on both sides under the eccentricity of the eccentric sliding bearings in the current embodiment.

[0050] Step 4: According to the current lateral adjustment amount, calculate the longitudinal overshoot or deficiency amounts on both sides after the eccentric sliding bearings rotate in place, and then calculate the longitudinal adjustment amount to be compensated.

[0051] Step 5: Loosen all the fastening screws of the eccentric sliding bearings, rotate the eccentric sliding bearings to the corresponding scale using a wrench according to the calculated angle, and select a suitable position to tighten the fastening screws in the grooves of the eccentric sliding bearings and the threaded holes of the bearing seats.

[0052] Step 6: Loosen the tensioning bolt, and according to the calculated longitudinal compensation adjustment amount, control the piezoelectric push rod through the corresponding voltage to make the wedge move, push the bearing seat to move up and down to meet the longitudinal adjustment amount, and tighten the tensioning bolt after adjustment.

[0053] Step 7: After the adjustment is completed, test and verify the adjustment results.

[0054] The present invention is aimed at adjusting the errors of different gear axes, and can be used to carry out various gear system testings under different errors, such as tooth root stress tests, transmission error tests, gear vibration tests, etc. It can also be applied to engineering practice, facilitating the deviation adjustment of the gearbox after long-term operation, and has a wide range of applications. Due to the combination of the eccentric method and the wedge method, the present invention overcomes the defects of over-adjustment or under-adjustment in a certain direction of the eccentric method. The lateral error can be adjusted by rotating the eccentric sliding bearings, and the longitudinal error can be compensated by pushing the wedge through the piezoelectric push rod, so that the errors in both directions can be accurately adjusted. At the same time, the center distance and the axis deflection angle can be jointly adjusted to meet the requirements of multiple application scenarios.

[0055] The eccentric bearing of the present invention can rotate in any direction within the bearing housing. By calculating the relationship between the rotation angle and the lateral adjustment amount, the angle to be rotated is determined. After calibrating and scaling the eccentric bearing, the lateral adjustment can be conveniently achieved by an external wrench. In addition, through the design of the arc-shaped groove and the distribution of the circumferential threaded holes, fastening at any angle can be realized, and the lateral adjustment amount can be accurately maintained. Compared with other adjustable gearboxes, the present invention compensates and adjusts the longitudinal error by pushing the wedge left and right through a piezoelectric push rod. After the lateral error of the eccentric bearing is adjusted, only the longitudinal error needs to be calculated to determine the compensation amount. Unscrew the tightening and loosening screws, control the precise movement of the wedge by controlling the voltage of the piezoelectric push rod. After the adjustment is completed, tighten the tightening and loosening screws, and the longitudinal adjustment amount is ensured to be maintained by the double guarantee of the wedge self-locking and the voltage of the piezoelectric push rod.

[0056] During the process of adjusting the lateral and longitudinal errors of the present invention, it is not necessary to disassemble the gearbox significantly. The entire adjustment process only requires externally rotating the eccentric bearing and externally controlling the piezoelectric push rod, avoiding other installation errors caused by adjusting a certain direction variable. It is convenient to operate, accurate in adjustment, and strong in practicability. The present invention can be designed for different adjustment amount requirements. By designing the eccentricity of the eccentric bearing and the angle of the wedge, the adjustment of different error types and error ranges can be realized. It has strong designability and a wide adjustment range. The structure of the present invention is simple and reliable, only requiring simple installation of parts, and some parts can use standard parts, having the advantages of simple manufacturing, convenient installation, and small error introduction.

Claims

1. A gearbox with adjustable center distance and axis deviation compensated by piezoelectricity, characterized in that: It includes an upper box body (1), a lower box body (2), a sliding bearing (3), a piezoelectric compensation adjustment mechanism (4), a gear assembly (5) and a tensioning bolt (6); the upper box body (1) is connected to the lower box body (2) and provides an installation position for the sliding bearing (3) and the piezoelectric compensation adjustment mechanism (4), and the sliding bearing (3) and the piezoelectric compensation adjustment mechanism (4) are installed between the upper box body (1) and the lower box body (2) to provide support for the shaft of the gear assembly (5), and the gear assembly (5) includes a pair of gears and a transmission shaft; the piezoelectric compensation adjustment mechanism (4) includes an eccentric sliding bearing and a piezoelectric-driven wedge to provide up, down, left and right movement for the shaft of the gear assembly (5); the sliding bearing (3), the piezoelectric compensation adjustment mechanism (4) and the tensioning bolt (6) are symmetrically arranged in the gearbox; the two shafts of the gear assembly (5), namely the driving shaft and the driven shaft, can be supported by the piezoelectric compensation adjustment mechanism (4) separately or simultaneously.

2. The center distance and axis deviation adjustable gearbox with piezoelectric compensation according to claim 1, characterized in that: Rectangular installation spaces are provided at corresponding positions on both sides of the upper box body (1) to provide a movement space for the piezoelectric compensation adjustment mechanism (4); threaded holes are provided at corresponding positions on both sides of the upper box body (1) for installing the tensioning screws (6), and the tensioning screws (6) are used to press the piezoelectric compensation adjustment mechanism (4).

3. The center distance and axis deviation adjustable gearbox with piezoelectric compensation according to claim 1, characterized in that: Two rectangular installation spaces are symmetrically distributed on the lower box body (2), vertical grooves are provided on both sides of this space, and a horizontal groove is provided at the bottom for the positioning and installation of the piezoelectric compensation adjustment mechanism (4) to ensure the up and down movement of the bearing seat and the horizontal movement of the wedge (403).

4. The center distance and axis deviation adjustable gearbox with piezoelectric compensation according to claim 1, characterized in that: The piezoelectric compensation adjustment mechanism (4) includes an upper half bearing seat (401), a lower half bearing seat (402), a wedge (403), an eccentric sliding bearing (404) and a piezoelectric push rod (405); the piezoelectric compensation adjustment mechanism (4) is integrally installed between the upper box body (1) and the lower box body (2) to support a shaft of the gear assembly (5) and achieve error adjustment.

5. The center distance and axis deviation adjustable gearbox with piezoelectric compensation according to claim 4, characterized in that: The upper half bearing seat (401) and the lower half bearing seat (402) are installed up and down and are positioned and fastened by pins and bolts on both sides; the eccentric sliding bearing (404) is installed between the upper half bearing seat (401) and the lower half bearing seat (402), and the outer circle and the inner circle of the eccentric sliding bearing (404) are eccentric structures with different centers, and lateral adjustment is achieved through the rotation of the eccentric sliding bearing (404).

6. The center distance and axis deviation adjustable gearbox with piezoelectric compensation according to claim 5, characterized in that: A number of threaded holes are circumferentially distributed on the inner step end faces of the upper half bearing seat (401) and the lower half bearing seat (402), and the threaded holes should be evenly distributed for fixing the eccentric sliding bearing (404) at any position; the eccentric sliding bearing (404) is provided with a concave step, which cooperates with the convex platforms inside the upper half bearing seat (401) and the lower half bearing seat (402); a number of circular arc grooves are evenly opened on one end face of the eccentric sliding bearing (404), the distribution center of the grooves coincides with the distribution center of the threaded holes of the bearing seat, and the width of the grooves corresponds to the diameter of the corresponding bolt holes.

7. The center distance and axis deviation adjustable gearbox with piezoelectric compensation according to claim 6, characterized in that: The arc-shaped groove should be able to fully expose at least two threaded holes to ensure that there are always more than two screws fastening the upper half bearing housing (401) and the lower half bearing housing (402).

8. The center distance and axis deviation adjustable gearbox with piezoelectric compensation according to claim 5, characterized in that: The bottom of the lower half bearing housing (402) is an inclined plane for mating with the inclined plane at the top of the wedge (403) to achieve free sliding. Vertical bosses protrude from both sides for axial positioning and ensuring its up and down movement in the vertical installation groove of the lower box body (2). The wedge (403) is installed below the lower half bearing housing, and a horizontal boss is provided at the bottom for axial positioning and ensuring its horizontal movement in the horizontal installation groove of the lower box body (2). Round holes are provided on both sides for installing the piezoelectric push rod (405). By externally controlling the piezoelectric push rod (405) to push the wedge (403) to move, the compensation adjustment of the longitudinal error is realized.

9. The center distance and axis deviation adjustable gearbox with piezoelectric compensation according to claim 1, characterized in that: The upper box body (1) and the lower box body (2) are connected by bolts.

10. The center distance and axis deviation adjustable gearbox with piezoelectric compensation according to any one of claims 1-9, characterized in that: During use, it includes the following steps: 1) According to the measurement results, calculate the deviation amount between the gear axis and the reference. 2) Determine the lateral and longitudinal adjustment amounts at both ends of the adjustable shaft. 3) According to the lateral adjustment amount, calculate the rotation angles of the eccentric sliding bearings on both sides under the eccentricity of the current eccentric sliding bearing. 4) According to the current lateral adjustment amount, calculate the longitudinal overshoot or deficiency amounts on both sides after the eccentric sliding bearings rotate in place, and then calculate the longitudinal adjustment amount to be compensated. 5) Loosen all the fastening screws of the eccentric sliding bearings, rotate the eccentric sliding bearings to the corresponding scale using a wrench according to the calculated angle, and select a suitable position to tighten the fastening screws in the grooves of the eccentric sliding bearings and the threaded holes of the bearing housing. 6) Loosen the tightening bolts. According to the calculated longitudinal compensation adjustment amount, control the piezoelectric push rod through the corresponding voltage to make the wedge move, pushing the bearing housing up and down to meet the longitudinal adjustment amount. After adjustment, tighten the tightening bolts. 7) After the adjustment is completed, test and verify the adjustment results.

Images