Eccentric shaft adjusting device for gear meshing side clearance of rotary mechanism and adjusting method thereof

Abstract

This invention discloses an eccentric shaft adjustment device and method for adjusting the gear meshing backlash of a rotating mechanism. The device includes a turntable structure with an upper and lower positioning ring pre-welded to its top and bottom, and integrally machined by a machining center to ensure concentricity. A reducer is vertically installed into the turntable structure from top to bottom, with its central axis eccentrically positioned to the turntable structure's central axis. The reducer is rotatably connected to a flange via a connecting flange, which is bolted to the upper positioning ring. The connecting flange, flange, and turntable structure are concentrically arranged, allowing the reducer to rotate circumferentially around the flange's central axis via the connecting flange. This invention achieves rapid and precise adjustment of gear meshing backlash through the cooperation of the eccentric shaft structure and the positioning rings, avoiding on-site welding and improving assembly accuracy and efficiency.

Description

Technical Field

[0001] This invention relates to the field of rotary machinery transmission technology, and in particular to an eccentric shaft adjustment device and method for adjusting the meshing backlash of gears in a rotary mechanism. Background Technology

[0002] In large transportation machinery such as cranes, the meshing accuracy of the pinion and internal gear ring on the output shaft of the reducer in the rotating mechanism directly affects the operational stability and lifespan of the equipment. Traditional methods for adjusting meshing backlash rely on on-site welding of the lower positioning ring for positioning. This method has the following drawbacks: the on-site welding adjustment accuracy is greatly affected by human factors, and concentricity is difficult to guarantee; the adjustment process is cumbersome, requiring multiple disassembly and measurement, resulting in low efficiency; welding thermal deformation may lead to accuracy deviations in the positioning structure, affecting long-term operational reliability. Therefore, this invention proposes an eccentric shaft adjustment device and method for adjusting the meshing backlash of gears in rotating mechanisms. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an eccentric shaft adjustment device and method for adjusting the gear meshing backlash of a rotating mechanism. By cooperating with the eccentric shaft structure and the positioning ring, the gear meshing backlash can be adjusted quickly and accurately, avoiding on-site welding and improving assembly accuracy and efficiency.

[0004] To solve the above-mentioned technical problems, the present invention provides an eccentric shaft adjustment device for the gear meshing backlash of a rotating mechanism, comprising a turntable structure. An upper positioning ring and a lower positioning ring are pre-welded to the top and bottom of the turntable structure and integrally formed by a machining center to ensure the concentricity of the upper and lower positioning rings. A reducer is installed vertically from top to bottom into the turntable structure, with its central axis eccentrically positioned to the central axis of the turntable structure. The reducer is rotatably connected to a flange via a connecting flange, and the flange is bolted to the upper positioning ring. The connecting flange, flange plate, and turntable structure are concentrically arranged. The reducer can rotate circumferentially around the central axis of the flange plate via the connecting flange. The eccentric shaft is installed at the output end of the reducer, and a drive gear that meshes with an external internal gear ring is installed at the lower end of the eccentric shaft. The adjusting mechanism and locking mechanism are bolted to the top of the flange plate near one side, used to precisely control the rotation angle and locking limit of the reducer, so as to adjust the meshing clearance between the drive gear and the internal gear ring. The positioning component is bolted to the bottom of the turntable structure, used to stabilize the lower end of the eccentric shaft.

[0005] The invention is further configured such that: a connecting flange is bolted to the outer wall of the reducer near the top position, and a pressure bearing is provided between the connecting flange and the flange plate, with the top and bottom of the pressure bearing respectively interference-fitted to the connecting flange and the flange plate.

[0006] The above technical solution facilitates the use of pressure bearings to ensure stable rotation of the connecting flange, reducing difficulties for workers during adjustment and improving the convenience and efficiency of adjustment.

[0007] The present invention is further configured such that: multiple scale marking strips are evenly distributed in the circumferential direction on the top of the flange near the inner wall, and the outer wall of the connecting flange is provided with identifiers that correspond to the scale marking strips.

[0008] The above technical solution allows for intuitive observation of the rotation angle by observing the movement of the marker on the scale marking strip when rotating the connecting flange, thereby enabling the calculation of the travel distance of the bottom drive gear.

[0009] The present invention is further configured such that: the adjustment mechanism includes a U-shaped frame bolted to the top of the flange, threaded cylinders are fixedly connected to both sides of the U-shaped frame, screws are threaded to the inner walls of the two threaded cylinders, rotating torsion blocks are fixedly connected to the opposite end faces of the two screws, and the opposite end faces of the two screws abut against the two sides of the push column threaded to the side wall of the connecting flange.

[0010] Through the above technical solution, two rotating torsion blocks are adjusted one after the other. The rotation of one rotating torsion block drives the corresponding lead screw to move inside the corresponding threaded cylinder, thereby making the end face of the lead screw away from the push column, leaving room for adjustment. The other rotating torsion block drives its corresponding lead screw to squeeze the push column, thereby driving the connecting flange to rotate in a certain direction on the flange.

[0011] The invention is further configured such that the two lead screws pass through the two threaded cylinders respectively, and the opposite end faces of the two lead screws are both tapered, while abutting against the smooth planes opened on both sides of the push column.

[0012] The above technical solution utilizes the tapered design of the lead screw end face to continuously compress and push the side of the push column, and to push it stably and precisely on a smooth plane, thereby driving the reducer on the connecting flange to perform fine-tuning operations.

[0013] The invention is further configured such that: the locking mechanism includes a locking block that is engaged with the top of the flange, a fastening bolt is provided through the middle of the locking block, and one end of the fastening bolt is threaded to the inner wall of the locking hole opened on the side wall of the connecting flange.

[0014] The above technical solution uses fastening bolts to connect and fix the locking block that is engaged with the flange, thereby connecting and fixing the connecting flange and the flange.

[0015] The invention is further configured such that: the locking block is fan-shaped and has a locking groove at the bottom that cooperates with the scale marking strip; the locking block is pressed and engaged with multiple corresponding scale marking strips through multiple locking grooves at its bottom.

[0016] The above technical solution allows for easy installation of a sector-shaped locking block on the top of the flange. The internal locking groove ensures stable engagement with the top of the flange. A scale marking strip limits and fixes the locking block, thus securing the adjusted position of the connecting flange.

[0017] The present invention is further configured such that: the upper end of the eccentric shaft is connected to the output end of the reducer via a coupling, and its lower end passes through the positioning assembly and is rotatably connected to it.

[0018] The above technical solution facilitates the stable rotation of the eccentric shaft by the output shaft of the reducer, and the eccentric shaft can rotate stably under the action of the positioning component.

[0019] The present invention is further configured such that: the positioning component includes an end cap riveted to the inner wall of the turntable structure, the end cap has a movable hole at its center, the eccentric shaft passes through the movable hole and can be adjusted within the movable hole, the bottom of the end cap is bolted to a positioning cover, and the positioning cover is sleeved on the outer wall of the eccentric shaft through an interference-fit bearing at its center.

[0020] The above technical solution utilizes the movable hole inside the end cover to allow the eccentric shaft a certain amount of room to move during adjustment. Under the action of the positioning cover, the adjusted eccentric shaft can be positioned so that it can rotate stably during driving, ensuring stable backlash between the drive gear and the internal gear ring.

[0021] On the other hand, a method for adjusting the eccentric shaft adjustment device for gear meshing backlash in a rotating mechanism is provided, including the following steps: S1. First, the upper positioning ring and the lower positioning ring are pre-welded to the top and bottom of the turntable structure, and the three are integrated through a machining center to ensure their concentricity. S2. Install the flange at the bottom of the external connecting flange of the reducer through the bearing bearing, then insert it into the inside of the turntable structure from top to bottom, and use the flange to make a pre-rotation adjustment on the upper positioning ring so that the drive gear and the internal gear ring are pre-positioned and meshed, and use bolts to install the flange on the upper positioning ring. S3. The end cap on the positioning component is pre-bolted to the bottom of the turntable structure, while the positioning cover is temporarily detached so that the adjusted eccentric shaft can be positioned and stabilized later. S4. A rotating torsion block on the drive adjustment mechanism drives the corresponding lead screw to move inside the corresponding threaded cylinder, thereby making the end face of the lead screw move away from the push column and reserving the necessary adjustment space for it; S5. Next, drive another rotating torsion block to move the corresponding lead screw inside its corresponding threaded cylinder, so that its end face is pressed against the push column. By applying pressure, the push column drives the connecting flange to rotate. At this time, the connecting flange drives the eccentrically mounted reducer to rotate circumferentially on the flange. Fine adjustments are made according to the markings on the connecting flange and the scale markings on the flange, so that the tooth surface of the drive gear on the end face of the eccentric shaft is close to the tooth surface of the internal gear ring, thereby adjusting the meshing clearance (there is an eccentricity e between the axis of the eccentric shaft and the center axis of the turntable structure. When the connecting flange rotates by an angle θ, the center of the drive gear at the lower end of the eccentric shaft moves a distance s=2e*sin(θ / 2) along the circumferential direction, thereby changing the meshing clearance between the drive gear and the internal gear ring). S6. Return the rotating torsion block in the reserved space of the drive, so that the lead screw is pressed against the adjusted push column, and the locking block is pressed and locked onto the scale marking strip through the locking groove. At the same time, use fastening bolts to fix it to the connecting flange to achieve the fixation of the adjusted reducer. S7. Finally, install the positioning cover on the end cover with bolts to ensure the stability of the rotational position of the lower end of the eccentric shaft, thereby ensuring that the drive gear and the internal gear ring maintain stable backlash during meshing.

[0022] The beneficial effects of this invention are as follows: 1. High-precision positioning: The upper and lower positioning rings are machined as a single unit through a machining center to ensure concentricity and avoid the errors of traditional welding and adjustment; 2. Convenient adjustment: By utilizing the cooperation between the eccentric shaft and the rotatable flange, the gear backlash can be adjusted by rotating the flange, eliminating the need for on-site welding and reducing the number of disassembly and assembly operations; 3. High adaptability: The backlash can be quantitatively adjusted through identifiers and scale markings to meet the meshing accuracy requirements under different working conditions; 4. High reliability: Eliminates the influence of welding heat deformation, has good structural stability, and maintains high accuracy over long-term operation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the running trajectory of the rotating mechanism and the internal gear ring in this invention; Figure 2 This is a cross-sectional view showing the connection between the rotating mechanism and the internal gear ring in this invention; Figure 3 This is a schematic diagram showing the connection between the drive gear and the internal gear ring in this invention; Figure 4 This is a structural diagram of the rotating mechanism in this invention; Figure 5This is a cross-sectional view of the rotating mechanism in this invention; Figure 6 This is an exploded view of the component installed on the reducer in this invention; Figure 7 This is a structural diagram of the accelerator in this invention; Figure 8 This is a schematic diagram showing the connection between the eccentric shaft and the reducer in this invention; Figure 9 for Figure 7 Enlarged view of point A in the middle; Figure 10 This is a structural diagram of the locking mechanism in this invention.

[0024] In the diagram: 1. Turntable structure; 11. Upper positioning ring; 12. Lower positioning ring; 2. Reducer; 21. Connecting flange; 211. Push column; 212. Locking hole; 3. Flange; 31. Scale marking strip; 4. Adjustment mechanism; 41. U-shaped frame; 42. Threaded cylinder; 43. Lead screw; 44. Rotating torsion block; 5. Locking mechanism; 51. Locking block; 511. Locking groove; 52. Fastening bolt; 6. Eccentric shaft; 7. Drive gear; 8. Positioning component; 81. End cap; 82. Movable hole; 83. Positioning cover; 9. Internal gear ring. Detailed Implementation

[0025] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0026] like Figures 1-6As shown, an eccentric shaft adjustment device for gear meshing backlash in a rotating mechanism includes a turntable structure 1. An upper positioning ring 11 and a lower positioning ring 12 are pre-welded to the top and bottom of the turntable structure 1 and are integrally machined by a machining center to ensure the concentricity of the upper and lower positioning rings 11 and 12. A brake and a motor are sequentially connected to the top of a reducer 2. When the motor is started, its output shaft drives the input shaft of the reducer 2 to rotate via the brake. The brake can also control the internal rotating shaft to stop rotating. The reducer 2 is installed vertically from top to bottom into the turntable structure 1, with its central axis eccentrically positioned relative to the central axis of the turntable structure 1. The reducer 2 is rotatably connected to a flange 3 via a connecting flange 21. The flange 3 is bolted to the upper positioning ring 11. The connecting flange 21, flange 3, and turntable structure 1 are concentrically positioned. The reducer 2 can be connected via the connecting flange... The reducer 2 rotates circumferentially around the central axis of the flange 3. The outer wall of the reducer 2 is bolted to the top position of the connecting flange 21. A pressure bearing is provided between the connecting flange 21 and the flange 3. The top and bottom of the pressure bearing are respectively interference-fitted to the connecting flange 21 and the flange 3. This allows the connecting flange 21 to rotate stably when rotating, reducing the difficulty of adjustment for the staff and improving the convenience and efficiency of adjustment. Multiple scale marking strips 31 are evenly distributed circumferentially on the top of the flange 3 near the inner wall. At the same time, the outer wall of the connecting flange 21 is provided with markings that correspond to the scale marking strips 31. This allows the rotating angle to be visually observed by the movement of the markings on the scale marking strips 31 when the connecting flange 21 is rotated, so as to calculate the travel distance of the bottom drive gear 7. like Figure 7 and Figure 8 As shown, the eccentric shaft 6 is installed at the output end of the reducer 2, and the lower end of the eccentric shaft 6 is equipped with a drive gear 7 that meshes with the external internal gear ring 9. The upper end of the eccentric shaft 6 is connected to the output end of the reducer 2 through a coupling, and its lower end passes through the positioning component 8 and is rotatably connected to it, so that the output shaft of the reducer 2 can stably drive the rotation of the eccentric shaft 6. Under the action of the positioning component 8, the eccentric shaft 6 can rotate stably.

[0027] like Figure 9 and Figure 10As shown, the adjusting mechanism 4 and the locking mechanism 5 are bolted to the top of the flange 3 near one side, used to precisely control the rotation angle and locking limit of the reducer 2, so as to adjust the meshing backlash between the drive gear 7 and the internal gear ring 9. The adjusting mechanism 4 includes a U-shaped frame 41 bolted to the top of the flange 3. Threaded cylinders 42 are fixedly connected to both sides of the U-shaped frame 41. A lead screw 43 is threaded to the inner wall of each of the two threaded cylinders 42. The two lead screws 43 pass through the two threaded cylinders 42 respectively, and the opposite end faces of the two lead screws 43 are tapered. They simultaneously press against the smooth planes on both sides of the push column 211. Utilizing the tapered end faces of the lead screws 43, they can continuously squeeze the side of the push column 211, and on the smooth surface... A stable and precise push is made on the plane, thereby driving the reducer 2 on the connecting flange 21 to perform fine adjustment. The opposite end faces of the two lead screws 43 are fixedly connected with rotating torsion blocks 44. The opposite end faces of the two lead screws 43 are pressed against both sides of the push column 211 threaded on the side wall of the connecting flange 21. The two rotating torsion blocks 44 are adjusted one after the other. The rotation of one rotating torsion block 44 drives the corresponding lead screw 43 to move inside the corresponding threaded cylinder 42, thereby making the end face of the lead screw 43 move away from the push column 211, leaving room for adjustment. The other rotating torsion block 44 drives its corresponding lead screw 43 to press the push column 211, thereby driving the connecting flange 21 to rotate in a certain direction on the flange 3. The locking mechanism 5 includes a locking block 51 that engages with the top of the flange 3. The locking block 51 is fan-shaped and has a locking groove 511 at its bottom that matches the scale marking strip 31. The locking block 51 is pressed and engaged with multiple corresponding scale marking strips 31 through the multiple locking grooves 511 at its bottom. The fan-shaped locking block 51 is easy to install on the top of the flange 3 and can be stably engaged with the top of the flange 3 by cooperating with the internal locking grooves 511. The scale marking strips 31 can limit and fix the locking block 51, thereby fixing the position of the connecting flange 21 after adjustment. A fastening bolt 52 is provided through the middle of the locking block 51, and one end of the fastening bolt 52 is threaded to the inner wall of the locking hole 212 opened on the side wall of the connecting flange 21. The fastening bolt 52 can connect and fix the locking block 51 engaged on the flange 3, thereby connecting and fixing the connecting flange 21 and the flange 3.

[0028] like Figure 6As shown, the positioning component 8 is bolted to the bottom of the turntable structure 1 to stabilize the lower end of the eccentric shaft 6. The positioning component 8 includes an end cap 81 riveted to the inner wall of the turntable structure 1. A movable hole 82 is provided at the center of the end cap 81. The eccentric shaft 6 passes through the movable hole 82 and can be adjusted within the movable hole 82. A positioning cover 83 is bolted to the bottom of the end cap 81. The positioning cover 83 is sleeved on the outer wall of the eccentric shaft 6 through an interference-fit bearing at its center. The movable hole 82 provided inside the end cap 81 allows the eccentric shaft 6 to have a certain amount of room to move when it is adjusted. Under the action of the positioning cover 83, the position of the adjusted eccentric shaft 6 can be positioned so that it can rotate stably during driving, ensuring the stability of the backlash between the drive gear 7 and the internal gear ring 9.

[0029] like Figures 1-10 As shown, a method for adjusting an eccentric shaft adjustment device for adjusting the meshing backlash of a rotating mechanism gear includes the following steps: S1. First, the upper positioning ring 11 and the lower positioning ring 12 are pre-welded to the top and bottom of the turntable structure 1, and the three are integrated by machining center to ensure the concentricity of the three. S2. Install the flange 3 at the bottom of the external connecting flange 21 of the reducer 2 through the bearing bearing, then insert it into the inside of the turntable structure 1 from top to bottom, and use the flange 3 to make a pre-rotation adjustment on the upper positioning ring 11 so that the drive gear 7 is pre-positioned and meshed with the internal gear ring 9, and use bolts to install the flange 3 on the upper positioning ring 11. S3. The end cap 81 on the positioning component 8 is pre-bolted to the bottom of the turntable structure 1, while the positioning cover 83 is temporarily detached so that the adjusted eccentric shaft 6 can be positioned and stabilized later. S4. A rotating torsion block 44 on the drive adjustment mechanism 4 drives the corresponding lead screw 43 to move inside the corresponding threaded cylinder 42, thereby making the end face of the lead screw 43 move away from the push column 211 and reserving the necessary adjustment space for it. S5. Next, drive another rotating torsion block 44 to drive the corresponding lead screw 43 to move inside its corresponding threaded cylinder 42, so that its end face is pressed against the push column 211. By applying pressure, the push column 211 drives the connecting flange 21 to rotate. At this time, the connecting flange 21 drives the eccentrically mounted reducer 2 to rotate circumferentially on the flange 3. The corresponding fine adjustment is made by the marking on the connecting flange 21 and the scale marking strip 31 on the flange 3. Thus, the tooth surface of the drive gear 7 on the end face of the eccentric shaft 6 is brought close to the tooth surface of the internal gear ring 9 by the circumferentially rotating reducer 2, so as to adjust the meshing clearance (the axis of the eccentric shaft 6 and the central axis of the turntable structure 1 have an eccentricity e. When the connecting flange 21 rotates by an angle θ, the center of the drive gear 7 at the lower end of the eccentric shaft 6 moves a distance s=2e*sin(θ / 2) along the circumferential direction, thereby changing the meshing clearance between the drive gear 7 and the internal gear ring 9). S6. Return the rotating torsion block 44 in the reserved space of the drive, so that the lead screw 43 abuts against the adjusted push column 211, and presses the locking block 51 into the scale marking strip 31 through the locking groove 511. At the same time, use the fastening bolt 52 to fix it to the connecting flange 21, so as to fix the adjusted reducer 2. S7. Finally, the positioning cover 83 is installed on the end cover 81 with bolts to ensure the stability of the rotational position of the lower end of the eccentric shaft 6, so that the drive gear 7 and the internal gear ring 9 maintain stable backlash during meshing.

[0030] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An eccentric shaft adjusting device for a rotational mechanism gear mesh side clearance, characterized by: include Turntable structure (1), the top and bottom of the turntable structure (1) are pre-welded with an upper positioning ring (11) and a lower positioning ring (12), and are integrally formed by machining center to ensure the concentricity of the upper positioning ring (11) and the lower positioning ring (12); The reducer (2) is installed vertically from top to bottom into the turntable structure (1), and its central axis is eccentrically set with the central axis of the turntable structure (1). The reducer (2) is rotatably connected to the flange (3) through the connecting flange (21). The flange (3) is bolted to the upper positioning ring (11). The connecting flange (21), the flange (3) and the turntable structure (1) are concentrically set. The reducer (2) can rotate circumferentially around the central axis of the flange (3) through the connecting flange (21). Eccentric shaft (6), the eccentric shaft (6) is installed at the output end of the reducer (2), and the lower end of the eccentric shaft (6) is equipped with a drive gear (7) that meshes with the external internal gear ring (9). Adjustment mechanism (4) and locking mechanism (5) are bolted to the top of flange (3) near one side, for precisely controlling the rotation angle and locking limit of reducer (2) to adjust the meshing clearance between drive gear (7) and internal gear ring (9); The adjustment mechanism (4) includes a U-shaped frame (41) bolted to the top of the flange (3). Threaded cylinders (42) are fixedly connected to both sides of the U-shaped frame (41). Screws (43) are threaded to the inner walls of the two threaded cylinders (42). Rotating torsion blocks (44) are fixedly connected to the opposite end faces of the two screws (43). The opposite end faces of the two screws (43) abut against the two sides of the push column (211) threaded to the side wall of the connecting flange (21). The locking mechanism (5) includes a locking block (51) that is engaged with the top of the flange (3). A fastening bolt (52) is provided through the middle of the locking block (51), and one end of the fastening bolt (52) is threaded to the inner wall of the locking hole (212) opened on the side wall of the connecting flange (21). Positioning component (8), which is bolted to the bottom of turntable structure (1), is used to stabilize the lower end of eccentric shaft (6).

2. The eccentric shaft adjustment device for gear meshing backlash in a rotating mechanism according to claim 1, characterized in that: The outer wall of the reducer (2) is bolted to a connecting flange (21) near the top. A pressure bearing is provided between the connecting flange (21) and the flange (3), and the top and bottom of the pressure bearing are respectively interference-fitted to the connecting flange (21) and the flange (3).

3. The eccentric shaft adjustment device for gear meshing backlash in a rotating mechanism according to claim 2, characterized in that: The flange (3) has multiple scale marking strips (31) evenly distributed in the circumferential direction near the inner wall of the top, and the outer wall of the connecting flange (21) is provided with identifiers that correspond to the scale marking strips (31).

4. The eccentric shaft adjustment device for gear meshing backlash in a rotating mechanism according to claim 1, characterized in that: The two lead screws (43) pass through the two threaded cylinders (42) respectively, and the opposite end faces of the two lead screws (43) are tapered, while pressing against the smooth planes opened on both sides of the push column (211).

5. The eccentric shaft adjustment device for gear meshing backlash in a rotating mechanism according to claim 1, characterized in that: The locking block (51) is fan-shaped and has a locking groove (511) at the bottom that matches the scale marking strip (31). The locking block (51) is pressed and engaged with multiple corresponding scale marking strips (31) through the multiple locking grooves (511) at its bottom.

6. The eccentric shaft adjustment device for gear meshing backlash in a rotating mechanism according to claim 1, characterized in that: The upper end of the eccentric shaft (6) is connected to the output end of the reducer (2) via a coupling, and its lower end passes through the positioning assembly (8) and is rotatably connected to it.

7. The eccentric shaft adjustment device for gear meshing backlash in a rotating mechanism according to claim 6, characterized in that: The positioning component (8) includes an end cap (81) riveted to the inner wall of the turntable structure (1). The end cap (81) has a movable hole (82) at its center. The eccentric shaft (6) passes through the movable hole (82) and can be adjusted within the movable hole (82). The bottom of the end cap (81) is bolted to a positioning cover (83), and the positioning cover (83) is sleeved on the outer wall of the eccentric shaft (6) through an interference fit bearing at its center.

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