Adjustment device and method for dynamic balancing of grinding wheel shaft in worm gear grinding machine

Abstract

This invention discloses an adjustment device and method for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine. The device includes a fixed-side housing and a grinding wheel shaft connecting housing connected in series. A linear motor stator is disposed within the fixed-side housing, and at least three linear motor movers are evenly arranged within the stator. Each linear motor mover is connected to a gear via a transmission mechanism, with the gear threaded onto the transmission mechanism. The gear is located within the grinding wheel shaft connecting housing, and limiting mechanisms restricting its axial movement are provided at both ends of the gear. A through hole is provided tangentially to each gear on the grinding wheel shaft connecting housing, and a mass block is disposed within each through hole. A rack is disposed on the surface of the mass block, meshing with the gear. The included angle between the axes of motion of adjacent mass blocks in space is equal. By changing the moment of inertia of the grinding wheel shaft and compensating for the reduction in moment of inertia caused by grinding wheel wear, online dynamic balancing of the grinding wheel shaft in the gear grinding machine can be achieved.

Description

Technical Field

[0001] This invention belongs to the field of grinding wheel shaft technology and relates to an adjustment device for dynamic balancing of grinding wheel shafts in worm gear grinding machines. Background Technology

[0002] Worm wheel grinding machines are high-efficiency gear finishing equipment. The working process of a worm wheel grinding machine is similar to the meshing process of a worm gear; the gear workpiece being machined is equivalent to the worm, and the grinding wheel is shaped like the worm. Therefore, to achieve high-speed and high-efficiency machining, the worm wheel needs to operate at very high speeds. This brings two problems to the grinding wheel shaft: dynamic balance and resonance. Since the grinding wheel is a wear part, it needs frequent dressing during grinding. This constant dressing causes significant changes in the dynamic balance of the grinding wheel, which can potentially deteriorate the accuracy and stability of high-speed grinding. The mechanical structure of the grinding wheel shaft has a certain resonant frequency, which is an inherent property of mechanics. The continuous dressing and wear of the grinding wheel cause changes in the moment of inertia of the entire grinding wheel shaft, thus changing its resonant frequency. During this process, the excitation generated by originally suitable machining parameters may cause resonance in the grinding wheel shaft, resulting in a decrease in machining quality.

[0003] To address the issue of changing dynamic balance in grinding wheels, one traditional method is to install a dynamic balancing module inside the grinding wheel's rotating shaft. This module works by using an accelerometer to detect the dynamic balance during the shaft's rotation, and then adjusting two eccentric pendulums. The changes in the absolute position and relative angle between these two pendulums adjust the dynamic balance of the grinding wheel shaft. However, this existing method only allows for fine-tuning of the dynamic balance, with negligible impact on the moment of inertia. When grinding wheel wear causes changes in moment of inertia, leading to variations in the resonant frequency, engineers must modify process parameters based on experience, impacting processing efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustment device for the dynamic balance of the grinding wheel shaft in a worm gear grinding machine, which solves the problem that the existing dynamic balance adjustment methods cannot compensate for the loss of rotational inertia caused by grinding wheel wear.

[0005] The technical solution adopted in this invention is an adjustment device for dynamic balancing of the grinding wheel shaft of a worm gear grinding machine, comprising a fixed-side housing and a grinding wheel shaft connecting housing connected in series. A linear motor stator is arranged inside the fixed-side housing, and at least three linear motor movers are evenly arranged inside the linear motor stator. Each linear motor mover is connected to a gear through a transmission mechanism. The gear is threaded onto the transmission mechanism and is located inside the grinding wheel shaft connecting housing. Limiting mechanisms restricting the axial movement of the gear are provided at both ends. A through hole is provided on the grinding wheel shaft connecting housing along the tangential direction of each gear. A mass block is arranged in the through hole, and a rack is arranged on the surface of the mass block. The rack meshes with the gear. The included angle between the motion axes of two adjacent mass blocks in space is equal.

[0006] The invention is further characterized by:

[0007] The stator of the linear motor is uniformly equipped with a first linear motor mover, a second linear motor mover, and a third linear motor mover. The first linear motor mover is connected to the first gear through an inner transmission shaft. The second linear motor mover is connected to the second gear through a middle transmission shaft sleeve. The third linear motor mover is connected to the third gear through an outer transmission shaft sleeve. The inner transmission shaft, the middle transmission shaft sleeve, and the outer transmission shaft sleeve are sequentially sleeved from the inside to the outside.

[0008] One end of the third gear is in contact with the housing of the grinding wheel shaft, and a second retaining ring is provided between the other end of the third gear and the second gear. A first retaining ring is provided between the second gear and the first gear, and a third retaining ring is provided at the free end of the first gear.

[0009] A first fixed sleeve is provided between the first mover of the linear motor and the inner transmission shaft, and a second fixed sleeve is provided between the second mover of the linear motor and the middle transmission shaft sleeve.

[0010] The middle layer drive shaft sleeve is threadedly connected to the second gear via a second stud, and the inner layer drive shaft is threadedly connected to the first gear via a first stud.

[0011] The fixed-side housing includes a hollow horizontal housing. One end of the horizontal housing is fixed with an end cap for axially pressing the stator of the linear motor, and the other end is connected to the grinding wheel shaft connecting housing. The grinding wheel shaft connecting housing includes a horizontal housing body. One end of the horizontal housing body is connected to the horizontal housing, and the other end is fixed with an inner end cap.

[0012] A T-shaped through hole is provided axially inside the horizontal outer shell. The inner end cap is connected to the large-diameter end of the horizontal outer shell. The gear end face near the fixed side of the outer shell contacts the horizontal outer shell and forms an axial limit on it.

[0013] The method for adjusting the dynamic balance of the grinding wheel shaft in a worm gear grinding machine includes the following steps:

[0014] Step 1: Obtain the diameter reduction of the grinding wheel based on the position feedback information of the grinding wheel shaft of the worm gear grinding machine; calculate the change in rotational inertia based on the diameter reduction; calculate the displacement change of the linear motor mover based on the change in rotational inertia; control the linear motor mover to move along the axis of the linear motor stator based on the displacement change of the linear motor mover.

[0015] Step 2: Obtain the data from the acceleration sensor on the grinding wheel shaft of the worm gear grinding machine, calculate the eccentric mass of the grinding wheel shaft, and adjust the mass block so that the eccentric mass of the grinding wheel shaft is the same in magnitude and opposite in direction as the eccentric mass generated by the mass block, thereby achieving dynamic balance adjustment of the grinding wheel shaft.

[0016] Adjust the mass block according to the following formula:

[0017]

[0018]

[0019]

[0020]

[0021]

[0022] The displacement change of the linear motor's mover is calculated based on the change in moment of inertia ΔJ, using the following formula:

[0023]

[0024] In the formula, m n Let r be the mass of the nth mass block. n Let Δx be the distance between the axis of motion of the nth mass block and the axis of rotation of the grinding wheel shaft. n Let d be the displacement change of the nth moving part of the linear motor. n Let d1 be the lead of the nth stud, where n>1, d1 is the thread lead of the transmission mechanism, and q is the number of mass blocks.

[0025] The beneficial effects of this invention are as follows: This invention is used for adjusting the dynamic balance of the grinding wheel shaft in a worm gear grinding machine. By controlling multiple mass blocks to move tangentially along the shaft using a linear motor, the moment of inertia of the grinding wheel shaft can be changed to compensate for the reduction in moment of inertia caused by grinding wheel wear, thereby stabilizing the natural frequency characteristics of the grinding wheel shaft and improving machining stability. Each mass block can move independently, and by combining multiple mass blocks to form eccentric masses of different phases and sizes, the dynamic balance of the grinding wheel shaft of the gear grinding machine can be achieved online, improving machining accuracy and stability. The moving structure and the fixed structure are non-contact, resulting in a long service life. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to the present invention;

[0027] Figure 2 This is a cross-sectional view (AA) of the adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to the present invention;

[0028] Figure 3 This is a BB cross-sectional view of the adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to the present invention;

[0029] Figure 4 This is a CC sectional view of the adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to the present invention.

[0030] In the diagram, 1. Fixed side outer shell, 1-1. Horizontal shell, 1-2. End cover, 2. Grinding wheel shaft connecting shell, 2-1. Horizontal outer shell body, 2-2. Inner end cover, 3. Linear motor stator, 4. Through hole, 5. Mass block, 6. First mover of linear motor, 7. Second mover of linear motor, 8. Third mover of linear motor, 9. Inner transmission shaft, 10. First gear, 11. Middle transmission shaft sleeve, 12. Second gear, 13. Outer transmission shaft sleeve, 14. Third gear, 15. Second retaining ring, 16. First retaining ring, 17. First fixing sleeve, 18. Second fixing sleeve, 19. Second stud, 20. First stud, 21. Third retaining ring. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] Adjustment device for dynamic balancing of grinding wheel shaft in worm gear grinding machine, such as Figure 1 As shown, the device includes a fixed-side housing 1 and a grinding wheel shaft connecting housing 2 connected in series. A linear motor stator 3 is housed within the fixed-side housing 1. At least three linear motor movers are evenly arranged within the linear motor stator 3. Each linear motor mover is connected to a gear via a transmission mechanism. The gears are threadedly connected to the transmission mechanism. The gears are located within the grinding wheel shaft connecting housing 2. Limiting mechanisms restricting the axial movement of the gears are provided at both ends. Figure 2-4 As shown, a through hole 4 is provided on the outer shell 2 of the grinding wheel shaft connection along the tangential direction of each gear. A mass block 5 is provided in the through hole 4. A rack is provided on the surface of the mass block 5, and the rack meshes with the gear. The included angle between the motion axes of two adjacent mass blocks 5 in space is equal.

[0034] Example 2

[0035] like Figure 1As shown, the adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine includes a fixed-side housing 1 and a grinding wheel shaft connecting housing 2 connected in series. A linear motor stator 3 is installed inside the fixed-side housing 1. At least three linear motor movers are evenly arranged inside the linear motor stator 3. Each linear motor mover is connected to a gear via a transmission mechanism. The linear motor mover is fixedly sleeved at one end of the transmission mechanism, and the gear is threadedly sleeved at the other end of the transmission mechanism. The gear is located inside the grinding wheel shaft connecting housing 2. Limiting mechanisms restricting the axial movement of the gear are provided at both ends. Figure 2-4 As shown, a through hole 4 is provided on the outer casing 2 of the grinding wheel shaft along the tangential direction of each gear. A mass block 5 is placed in the through hole 4, and a rack is provided on the surface of the mass block 5. The rack meshes with the gear, and the mass block 5 slides in the through hole 4. The angle between the motion axes of two adjacent mass blocks 5 in space is equal.

[0036] In this embodiment, the fixed-side outer shell 1 includes a hollow horizontal shell 1-1. One end of the horizontal shell 1-1 is fixed with an end cap 1-2 for axially pressing the linear motor stator 3, and the other end is connected to the grinding wheel shaft connecting shell 2. The grinding wheel shaft connecting shell 2 includes a horizontal outer shell 2-1. One end of the horizontal outer shell 2-1 communicates with the horizontal shell 1-1, and the other end is fixed with an inner end cap 2-2. A T-shaped through hole is provided along the inner axial direction of the horizontal outer shell 2-1. The inner end cap 2-2 is connected to the large-diameter end of the horizontal outer shell 2-1. The gear end face near the fixed-side outer shell 1 contacts the horizontal outer shell 2-1, forming an axial limit on it.

[0037] In this embodiment, the linear motor includes three actuators: a first actuator 6, a second actuator 7, and a third actuator 8. Corresponding gears include a first gear 10, a second gear 12, and a third gear 14. The corresponding transmission mechanism includes an inner transmission shaft 9, a middle transmission shaft sleeve 11, and an outer transmission shaft sleeve 13. Specifically, the first actuator 6 is connected to the first gear 10 via the inner transmission shaft 9; the second actuator 7 is connected to the second gear 12 via the middle transmission shaft sleeve 11; and the third actuator 8 is connected to the third gear 14 via the outer transmission shaft sleeve 13. The third actuator 8 is fixed to the outer transmission shaft sleeve 13 by a locking screw. The third gear 14 is threaded onto the end of the outer transmission shaft sleeve 13. When the third actuator 8 drives the outer transmission shaft sleeve 13 to move axially, the third gear 14 rotates along the outer transmission shaft sleeve 13. The inner drive shaft 9, the middle drive shaft sleeve 11, and the outer drive shaft sleeve 13 are sequentially sleeved from the inside out. The inner drive shaft 9, the middle drive shaft sleeve 11, and the outer drive shaft sleeve 13 can move independently along the axial direction of the grinding wheel shaft connecting housing 2, but their rotational freedom is restricted.

[0038] When the grinding wheel is working, the grinding wheel shaft connecting the outer shell 2 and its internal components rotate together with the grinding wheel. In this embodiment, the linear motor stator 3 can adopt a ring structure. When the first moving part 6 of the linear motor drives the inner transmission shaft 9 to move axially, the rotation of the inner transmission shaft 9 does not affect its displacement along the axial direction. That is, the linear motor stator 3 only controls the axial movement of the first moving part 6 of the linear motor. The rotational motion around the axis is in a free state, so the rotation of the inner transmission shaft 9 is also in a free state.

[0039] Furthermore, the limiting mechanism includes a third retaining ring 21, a first retaining ring 16, and a second retaining ring 15. One end of the third gear 14 contacts the grinding wheel shaft connecting housing 2, and the other end of the third gear 14 is provided with a third retaining ring 21 between it and the second gear 12 to achieve axial limiting. A second retaining ring 15 is provided between the second gear 12 and the first gear 10, and a first retaining ring 16 is provided between the first gear 10 and the inner end cover 2-2.

[0040] Furthermore, a first fixing sleeve 17 is fixed between the first moving part 6 of the linear motor and the inner transmission shaft 9. The first moving part 6 of the linear motor and the first fixing sleeve 17 are fixed by an outer locking screw, and the inner transmission shaft 9 and the first fixing sleeve 17 are fixed by an inner locking screw. A second fixing sleeve 18 is provided between the second moving part 7 of the linear motor and the middle transmission shaft sleeve 11. The second moving part 7 of the linear motor and the second fixing sleeve 18 are fixed by an outer locking screw, and the second fixing sleeve 18 and the middle transmission shaft sleeve 11 are fixed by an inner locking screw.

[0041] Furthermore, a second stud 19 is provided between the middle layer drive shaft sleeve 11 and the second gear 12. The second stud 19 and the second gear 12 are engaged by a large helix angle thread, and the middle layer drive shaft sleeve 11 and the second stud 19 are fixedly connected. A first stud 20 is provided between the inner layer drive shaft 9 and the first gear 10. The first gear 10 and the first stud 20 are engaged by a large helix angle thread, and the inner layer drive shaft 9 and the first stud 20 are fixedly connected.

[0042] The working principle of the adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine is as follows:

[0043] During operation, the outer ring of end caps 1-2 can be connected to the fixed bracket of the machine tool grinding wheel spindle, so that the fixed side housing 1 and the linear motor stator 3 do not move or rotate during operation. The linear motor stator 3 drives the first moving part 6 of the linear motor to move along the axis, and the inner transmission shaft 9 moves synchronously with the first moving part 6 of the linear motor. The first stud 20 moves axially synchronously. Since the first stud 20 and the first gear 10 are engaged by a large helix angle thread, and the axial displacement of the first gear 10 is limited by the first retaining ring 16 and the second retaining ring 15, the axial movement of the first stud 20 causes the first gear 10 to rotate. The rotation of the first gear 10 will push the mass block 5 to move in the through hole 4 in the grinding wheel spindle connecting housing 2, so that the distance between the center of gravity of the mass block 5 and the rotation center of the grinding wheel spindle changes.

[0044] The stator 3 of the linear motor drives the first mover 6 of the linear motor to move along the axis. The middle transmission shaft sleeve 11 moves synchronously with the second mover 7 of the linear motor. The second stud 19 moves axially synchronously. Since the second stud 19 and the second gear 12 are engaged by a large helix angle thread, and the axial displacement of the second gear 12 is restricted by the third retaining ring 21 and the second retaining ring 15, the axial movement of the second stud 19 causes the second gear 12 to rotate. The rotation of the second gear 12 will push the mass block 5 to move in the through hole 4 in the grinding wheel shaft connecting housing 2, so that the distance between the center of gravity of the mass block 5 and the rotation center of the grinding wheel shaft changes.

[0045] The stator 3 of the linear motor drives the third mover 8 of the linear motor to move along the axis. The outer transmission sleeve 13 moves synchronously with the third mover 8 of the linear motor. Since the outer transmission sleeve 13 and the third gear 14 are connected by a large helix angle thread, and the axial displacement of the third gear 14 is restricted by the grinding wheel shaft connecting housing 2 and the third retaining ring 21, the axial movement of the outer transmission sleeve 13 causes the third gear 14 to rotate. The rotation of the third gear 14 will push the mass block 5 to move in the through hole 4 in the grinding wheel shaft connecting housing 2, so that the distance between the center of gravity of the mass block 5 and the rotation center of the grinding wheel shaft changes.

[0046] Example 3

[0047] The method for adjusting the dynamic balance of the grinding wheel shaft in a worm gear grinding machine includes the following steps:

[0048] Step 1: Rotational inertia compensation process. The radius R of the grinding wheel before and after grinding and dressing can be obtained from the grating position feedback information equipped on the radial feed axis of the worm gear grinding machine. s and R e Therefore, the change in rotational inertia caused by the loss of this portion of grinding wheel material can be calculated using the following formula.

[0049]

[0050] In the formula: B is the width of the grinding wheel, and ρ is the average density of the grinding wheel;

[0051] The displacement change Δx of the linear motor's mover is calculated using the following formula based on the change in moment of inertia ΔJ. n Based on the displacement change Δx of the linear motor mover n Control the movement of the three linear motor movers along the axial direction of the linear motor stator;

[0052]

[0053] In the formula, m n Let r be the mass of the nth mass block. n Let Δx be the distance between the axis of motion of the nth mass block and the axis of rotation of the grinding wheel shaft. n Let d be the displacement change of the nth moving part of the linear motor. n (n>1) is the lead of the nth stud, and d1 is the lead of the thread at the end of the outer transmission sleeve 13;

[0054] Step 2: Calculate the eccentric mass m of the grinding wheel shaft based on the radial acceleration data of the grinding wheel shaft obtained from the accelerometer on the worm gear grinding machine. bias and eccentric phase θ bias Adjust mass block 5 according to the following formula so that the eccentric mass of the grinding wheel shaft is the same in magnitude but opposite in phase to the eccentric mass generated by mass block 5, thereby achieving dynamic balance adjustment of the grinding wheel shaft:

[0055]

[0056]

[0057]

[0058]

[0059]

[0060] In the above formula, q is the number of mass blocks, and θ n Let n be the phase angle of the mass block n.

[0061] In this embodiment, the specific steps for calculating the eccentric mass of the grinding wheel shaft based on the data obtained from the acceleration sensor on the grinding wheel shaft of the worm gear grinding machine are as follows:

[0062] First, a stationary Cartesian coordinate system, numbered 1, is established on the grinding wheel shaft. The z-axis of this coordinate system points in the axial direction of the grinding wheel, while the x and y axes point in the radial direction of the grinding wheel. Sensors measuring acceleration in the x and y directions are installed on the stationary platform of the grinding wheel shaft. As the grinding wheel rotates, the acceleration signals in the x and y axial directions of stationary coordinate system 1 can be measured.

[0063] Secondly, a coordinate system, designated as coordinate system 2, is established on the grinding wheel to follow its rotation. The z-axis of coordinate system 2 points along the axis of the grinding wheel, while the x and y axes point along the radial direction of the grinding wheel. As the grinding wheel rotates, coordinate system 2 rotates synchronously with the grinding wheel. Since the z-axis of coordinate systems 1 and 2 coincide, coordinate system 2 is equivalent to coordinate system 1 rotating around the z-axis by an angle. This angle can be obtained from feedback by the encoder of the grinding wheel.

[0064] After the grinding wheel starts rotating, the accelerometer can measure the acceleration in the x and y directions of coordinate system 1. Since this acceleration is mainly caused by dynamic imbalance, it is periodic with the grinding wheel rotation speed. Through the position feedback of the grinding wheel encoder, the acceleration change data in coordinate system 1 can be transformed to obtain the acceleration in coordinate system 2 as the reference coordinate system. The x and y axis accelerations in coordinate system 2 after transformation are then constants related to the rotational speed. The angle resulting from the synthesis of the x and y axis acceleration vectors in coordinate system 2 is the eccentric phase. The magnitude of the synthesized acceleration vector is proportional to the square of the grinding wheel rotational speed and the magnitude of the eccentric mass. During the debugging phase, the conversion coefficient between the accelerometer magnitude and the rotational speed is calibrated under the condition that the eccentric mass is determined. In subsequent use, the magnitude of the eccentric mass can be calculated by combining the acceleration magnitude with the grinding wheel rotational speed data.

[0065] Through the above methods, the present invention provides an adjustment device for the dynamic balance of the grinding wheel shaft in a worm gear grinding machine. By controlling multiple mass blocks to move tangentially along the shaft using a linear motor, the moment of inertia of the grinding wheel shaft can be altered to compensate for the reduction in inertia caused by grinding wheel wear. This stabilizes the natural frequency characteristics of the grinding wheel shaft and improves machining stability. Each mass block can move independently, and by combining multiple mass blocks to form eccentric masses of different phases and sizes, online dynamic balance of the grinding wheel shaft can be achieved, improving machining accuracy and stability. Furthermore, the moving and fixed structures are non-contact, resulting in a long service life.

Claims

1. An adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine, characterized in that, The device includes a fixed-side housing (1) and a grinding wheel shaft connecting housing (2) connected in series. A linear motor stator (3) is provided inside the fixed-side housing (1). At least three linear motor movers are evenly arranged inside the linear motor stator (3). Each linear motor mover is connected to a gear through a transmission mechanism. The gear is threaded onto the transmission mechanism. The gear is located inside the grinding wheel shaft connecting housing (2). Limiting mechanisms that restrict the axial movement of the gear are provided at both ends. A through hole (4) is provided on the grinding wheel shaft connecting housing (2) along the tangential direction of each gear. A mass block (5) is provided inside the through hole (4). A rack is provided on the surface of the mass block (5). The rack meshes with the gear. The angle between the motion axes of two adjacent mass blocks (5) in space is equal.

2. The adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to claim 1, characterized in that, The linear motor stator (3) is uniformly provided with a first linear motor mover (6), a second linear motor mover (7), and a third linear motor mover (8). The first linear motor mover (6) is connected to the first gear (10) through the inner transmission shaft (9). The second linear motor mover (7) is connected to the second gear (12) through the middle transmission shaft sleeve (11). The third linear motor mover (8) is connected to the third gear (14) through the outer transmission shaft sleeve (13). The inner transmission shaft (9), the middle transmission shaft sleeve (11), and the outer transmission shaft sleeve (13) are sequentially sleeved from the inside to the outside.

3. The adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to claim 2, characterized in that, One end of the third gear (14) is in contact with the grinding wheel shaft connecting housing (2), and the other end of the third gear (14) is provided with a second retaining ring (15) between it and the second gear (12). The second gear (12) is provided with a first retaining ring (16) between it and the first gear (10), and the free end of the first gear (10) is provided with a third retaining ring (21).

4. The adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to claim 3, characterized in that, A first fixed sleeve (17) is provided between the first mover (6) of the linear motor and the inner transmission shaft (9), and a second fixed sleeve (18) is provided between the second mover (7) of the linear motor and the middle transmission shaft sleeve (11).

5. The adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to claim 4, characterized in that, The middle layer drive shaft sleeve (11) is threadedly connected to the second gear (12) via the second stud (19), and the inner layer drive shaft (9) is threadedly connected to the first gear (10) via the first stud (20).

6. The adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to claim 5, characterized in that, The fixed side housing (1) includes a hollow horizontal housing (1-1), one end of which is fixed with an end cap (1-2) for axially pressing the linear motor stator (3), and the other end is connected to the grinding wheel shaft connecting housing (2); the grinding wheel shaft connecting housing (2) includes a horizontal housing body (2-1), one end of which is connected to the horizontal housing (1-1), and the other end is fixed with an inner end cap (2-2).

7. The adjustment device for dynamic balancing of the grinding wheel shaft in a worm gear grinding machine according to claim 6, characterized in that, A T-shaped through hole is provided along the inner axial direction of the horizontal outer shell (2-1). The inner end cap (2-2) is connected to the large diameter end of the horizontal outer shell (2-1). The gear end face near the fixed side shell (1) contacts the horizontal outer shell (2-1) and forms an axial limit on it.

8. A method for adjusting the dynamic balance of the grinding wheel shaft in a worm gear grinding machine, comprising the adjustment device for adjusting the dynamic balance of the grinding wheel shaft in a worm gear grinding machine as described in claim 7, characterized in that... Includes the following steps: Step 1: Obtain the diameter reduction of the grinding wheel based on the position feedback information of the grinding wheel shaft of the worm gear grinding machine, and calculate the change in rotational inertia based on the diameter reduction; calculate the displacement change of the linear motor mover based on the change in rotational inertia, and control the linear motor mover to move along the axial direction of the linear motor stator (3) based on the displacement change of the linear motor mover. Step 2: Obtain the data from the acceleration sensor on the grinding wheel shaft of the worm gear grinding machine, calculate the eccentric mass of the grinding wheel shaft, and adjust the mass block (5) so that the eccentric mass of the grinding wheel shaft is the same in magnitude and opposite in direction as the eccentric mass generated by the mass block (5), thereby achieving dynamic balance adjustment of the grinding wheel shaft.

9. The method for adjusting the dynamic balance of the grinding wheel shaft in a worm gear grinding machine according to claim 8, characterized in that, Adjust the mass block (5) according to the following formula: In the formula: The mass of the grinding wheel shaft is eccentric. This refers to the phase of the grinding wheel shaft eccentricity; q The number of mass blocks, θ n For mass blocks n The phase angle at which it is located; Let the mass of the nth mass block be... Let be the distance between the axis of motion of the nth mass block and the axis of rotation of the grinding wheel shaft. Let be the displacement change of the nth moving part of the linear motor. Let n be the lead of the nth stud, where n = 1, 2, ... q , d q This refers to the lead of the thread at the end of the outer drive shaft sleeve.

10. The method for adjusting the dynamic balance of the grinding wheel shaft in a worm gear grinding machine according to claim 9, characterized in that, Based on the change in moment of inertia The displacement change of the linear motor's mover is calculated using the following formula: In the formula, Let the mass of the nth mass block be... Let be the distance between the axis of motion of the nth mass block and the axis of rotation of the grinding wheel shaft. Let be the displacement change of the nth moving part of the linear motor. Let n be the lead of the nth stud, where n = 1, 2, ... q , d q The lead of the thread at the end of the outer drive shaft sleeve. q This represents the number of mass blocks.

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