Positioning device and method for dynamic balance test of hollow gear

Abstract

The present invention relates to the field of dynamic balancing test, and in particular to a positioning device and method for dynamic balancing test of hollow gears. The device includes a positioning seat, a positioning gear, a laser drill and an inner peripheral positioning cylinder. A through hole is set at the center of the positioning seat, and is fixed to the end of the test shaft through the through hole sleeve. An outer peripheral positioning component and a balance correction component are set on the outer periphery of the positioning seat; the positioning gear is detachably set on the outer peripheral positioning component; the laser drill is set on the balance correction component; the inner peripheral positioning cylinder is rotatably connected to the test shaft through a through hole, and an inner peripheral positioning component is set on the inner peripheral positioning cylinder. The present invention sets an outer peripheral positioning component, an inner peripheral positioning component, a balance correction component, a positioning gear and a laser drill to cooperate to synchronously position the inner and outer sides of the hollow gear. While the positioning is stable, the rotation correction of the hollow gear can be adjusted, so that the balance test can be carried out while timely correcting and verifying the balance, so that the test content is rich, the function is compact, and the operation is efficient.

Description

Technical Field

[0001] The invention relates to the field of dynamic balance testing, and in particular to a positioning device and method for dynamic balance testing of a hollow gear. Background Art

[0002] Gears are important transmission components in mechanical equipment, and their operating status directly affects the performance and life of the entire equipment. Dynamic balancing tests can check the balance of the gear system in operation, ensure that the center of gravity of the gear is located on the rotating axis when it rotates at high speed, and avoid additional vibration and noise caused by imbalance. This test helps to promptly discover and solve the imbalance problem of the gear system, thereby ensuring the stable operation of the gear system. When performing a dynamic balancing test, the gear needs to be positioned on the test shaft of the dynamic balancing test machine, and the vibration generated during the rotation process is measured by the sensor or vibrometer on the test shaft. These vibration signals contain the intrinsic vibration of the rotating equipment and the additional vibration caused by imbalance. The vibration signal measured by the sensor is amplified and filtered, and then converted into the amplitude and phase of the imbalance. Vibration measurement data is usually expressed as a vibration vector, which contains amplitude and phase information. According to the size and direction of the vibration vector, the imbalance of the equipment and its position can be calculated.

[0003] A Chinese patent with authorization announcement number CN211401541U discloses a positioning device for dynamic balancing test of hollow gears, including a core shaft, on which the hollow gear can be mounted, and also including a positioning plate and a tapered plate sleeved on the core shaft; an annular stop is provided on the positioning plate, and there are multiple annular stoppers, which are arranged along the axial direction of the core shaft, and along the direction from the positioning plate to the tapered plate, the outer diameters of the multiple annular stoppers decrease successively, and annular stoppers of different diameters match hollow gears of different inner diameters, the small diameter end face of the tapered plate is opposite to the positioning plate, and along the axial direction of the core shaft, different positions of the tapered annular surface of the tapered plate match hollow gears of different inner diameters.

[0004] The positioning technology for hollow gear dynamic balancing test in the prior art has the following shortcomings: positioning is performed only from the inner circumference of the hollow gear, and the positioning method is single. During the test shaft rotation test, the positioning plate is easy to loosen, causing the hollow gear to shake synchronously. The stability of the hollow gear positioning is difficult to ensure, which is easy to cause test errors. The position of the hollow gear cannot be adjusted during the positioning process, so it is impossible to further correct its unbalanced position. Summary of the invention

[0005] In view of the problems existing in the background technology, a positioning device and method for dynamic balancing test of hollow gears are proposed. By setting an outer peripheral positioning component, an inner peripheral positioning component, a balance correction component, a positioning gear and a laser drill, the hollow gear can be synchronously positioned inside and outside the dynamic balancing test. While the positioning is stable, the rotation correction of the hollow gear can be adjusted, and the balance can be corrected and verified in time while the balance test is realized, which makes the test content rich, the function compact and the operation efficient.

[0006] The present invention proposes a positioning device for dynamic balancing test of hollow gears, comprising a positioning seat, a positioning gear, a laser drill and an inner peripheral positioning cylinder. A through hole is arranged at the center of the positioning seat, and the positioning seat is fixed to the end of the test shaft through the through hole sleeve, and an outer peripheral positioning component and a balance correction component are arranged on the outer periphery of the positioning seat; the positioning gear is detachably arranged on the outer peripheral positioning component, and is driven to move and rotate by the outer peripheral positioning component, and is positioned by meshing with the outer periphery of the hollow gear on the one hand, and is driven to rotate by meshing with the outer periphery of the hollow gear on the other hand, so as to adjust the unbalanced position of the hollow gear to be opposite to the balance correction component; the laser drill is arranged on the balance correction component, and a hole is drilled at the unbalanced position of the hollow gear to achieve the purpose of weight reduction and balance; the inner peripheral positioning cylinder is rotatably connected with the test shaft through the through hole, and the inner peripheral positioning component is arranged on the inner peripheral positioning cylinder.

[0007] Preferably, mounting grooves one and two are alternately arranged on the periphery of the through hole in front, back, left and right directions; two groups of peripheral positioning components are respectively arranged in the two groups of mounting grooves one, and are arranged in a mirror image; two groups of balance correction components are respectively arranged in the two groups of mounting grooves two, and are arranged in a mirror image.

[0008] Preferably, the peripheral positioning assembly includes a moving block 1 that moves horizontally along a mounting groove 1; a rotating mounting rod is provided on the moving block 1; and the positioning gear is sleeved on the mounting rod and fastened by a fixing member.

[0009] Preferably, the balance correction assembly includes a second moving block that moves horizontally along the second mounting groove; a laser drill is arranged on the second moving block, and emits laser to drill toward the unbalanced position of the hollow gear.

[0010] Preferably, dust boxes are provided at the upper and lower ends of the second mounting groove; a dust hood is provided at the air inlet end of the dust box, and the air outlet end is connected to the dust filter box through a pipeline and an air pump; the dust filter box is located at the rear end of the positioning seat, and a filter element is provided inside it.

[0011] Preferably, the inner circumference positioning cylinder includes a cylinder body; one end of the cylinder body passes through a through hole through a one-way bearing and is rotatably connected to the test shaft; the rotation direction of the cylinder body is opposite to the rotation direction of the test shaft and the positioning gear; the inner circumference positioning assembly is arranged on the cylinder body to position the inner circumference of the hollow gear along the outer circumference of the cylinder body.

[0012] Preferably, the side wall of the cylinder is provided with an opening cooperating with the inner circumference positioning assembly, and a cavity with a connecting opening and for installing the inner circumference positioning assembly is provided inside; the inner circumference positioning assembly includes an inner circumference positioning plate, and multiple groups of inner circumference positioning plates slide in and out of the opening synchronously.

[0013] Preferably, the test shaft is connected to the positioning seat and the inner circumference positioning cylinder through a connecting piece; the connecting piece includes a mounting ring which is detachably connected to the positioning seat and opposite to the through hole; the mounting sleeve is connected to the through hole, one end of which is connected to the mounting ring and the other end of which is detachably connected to the test shaft; the one-way bearing extends into the mounting sleeve and is connected to the test shaft.

[0014] Preferably, the test shaft transmits the vibration of the hollow gear during rotation through a vibration guide; the vibration guide includes a vibration guide seat detachably fixed on the positioning seat, a vibration guide ring sleeved on the test shaft, and a vibration guide rod connecting the vibration guide seat and the vibration guide ring; the vibration guide ring is coaxial with the hollow gear to be tested, and a vibration reinforcement plate corresponding to the vibration guide rod is arranged on the inner wall of the ring.

[0015] The present invention further proposes a positioning method for a dynamic balancing test of a hollow gear, which adopts the above-mentioned positioning device for a dynamic balancing test of a hollow gear, and the positioning steps are as follows: the hollow gear to be tested is sleeved on the inner circumference positioning cylinder facing the through hole, and the inner wall of the hollow gear is positioned by the inner circumference positioning assembly so that it is coaxial with the test axis; a positioning gear matching the hollow gear to be tested is installed on the outer circumference positioning assembly, and the positioning gear is adjusted to mesh with the outer circumference of the hollow gear; the test shaft rotates, the balancing test machine starts working, and the positioning seat and the inner circumference positioning cylinder rotate synchronously; according to the test results, the positioning gear rotates, driving the hollow gear and the inner circumference positioning assembly to rotate synchronously, the unbalanced position on the hollow gear is opposite to the balance correction assembly, and the laser drill drills a hole to reduce weight for balance correction.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: an outer peripheral positioning component and an inner peripheral positioning component are arranged to cooperate to dynamically position the hollow gear. The outer peripheral positioning component is provided with the movement and rotation of the mounting rod and the connection with the positioning gear, so that the positioning gear and the hollow gear are meshed. This meshing relationship realizes the positioning of the outer periphery of the hollow gear on the one hand to ensure that the hollow gear is stable during the test, and on the other hand to drive the hollow gear to rotate, so as to realize the position adjustment of the hollow gear during the correction. The outer peripheral positioning component is provided with multiple groups of inner peripheral positioning plates that slide in and out of the opening synchronously, and then fit the inner wall of the hollow gear to position its inner periphery. Therefore, the scheme in the present invention can synchronously position the inner and outer sides of the hollow gear, and the hollow gear can be flexibly adjusted while the positioning is stable. While the hollow gear rotates, it cooperates with the balance correction component, and the balance correction component drives the laser drill to move to the position opposite to the unbalanced position on the hollow gear, and the laser drill is used to drill holes to reduce weight for balance correction. Therefore, the scheme in the present invention can timely correct and verify the balance during the balance test, so that the test content is rich, the function is compact, and the operation is efficient. In addition, the calibration process is coordinated with timely absorption of smoke and dust to further reduce test errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the positioning device for dynamic balancing test of hollow gears in the present invention (viewing angle 1);

[0018] Figure 2 It is a structural schematic diagram of the positioning device for dynamic balancing test of hollow gears in the present invention (viewing angle 2);

[0019] Figure 3 It is a structural schematic diagram of the positioning device for dynamic balancing test of hollow gears in the present invention (viewing angle 3);

[0020] Figure 4 A disassembled schematic diagram of the positioning device for dynamic balancing test of hollow gears in the present invention (viewing angle 4);

[0021] Figure 5 A disassembled schematic diagram of the positioning device for dynamic balancing test of hollow gears in the present invention (viewing angle 5);

[0022] Figure 6 It is a partial cross-sectional view of the positioning seat in the present invention;

[0023] Figure 7 for Figure 6 The enlarged schematic diagram at A in the middle;

[0024] Figure 8 It is a structural schematic diagram of the inner peripheral positioning cylinder in the present invention;

[0025] Fig. 9It is a cross-sectional view of the inner peripheral positioning cylinder in the present invention;

[0026] Fig.10 for Figure 4 Enlarged schematic diagram of point B in the middle.

[0027] Figure numerals: 1, test axis; 2, positioning seat; 201, peripheral positioning assembly; 20101, lead screw 1; 20102, moving block 1; 20103, mounting rod; 20104, fixing piece; 202, balance correction assembly; 20201, lead screw 2; 20202, moving block 2; 20203, dust collecting box; 2024, dust collecting cover; 20205, pipeline; 20206, vacuum pump; 20207, dust filter box; 203, through hole; 3, inner peripheral positioning assembly Position cylinder; 301, inner circumference positioning assembly; 30101, inner circumference positioning plate; 30102, motor four; 30103, rotating shaft; 30104, bevel gear one; 30105, lead screw three; 30106, bevel gear two; 302, cylinder body; 303, one-way bearing; 4, positioning gear; 5, vibration guide; 501, vibration guide seat; 502, vibration guide rod; 503, vibration guide ring; 6, connecting piece; 601, mounting ring; 602, mounting sleeve; 7, laser drill. DETAILED DESCRIPTION

[0028] Embodiment 1, as Figure 1-Figure 5 As shown, a positioning device for dynamic balancing test of hollow gears proposed by the present invention comprises a positioning seat 2, a positioning gear 4, a laser drill 7 and an inner peripheral positioning cylinder 3. A through hole 203 is arranged at the center of the positioning seat 2, and the positioning seat 2 is fixed to the end of the test shaft 1 through the through hole 203. An outer peripheral positioning component 201 and a balance correction component 202 are arranged on the outer periphery of the positioning seat 2; the positioning gear 4 is detachably arranged on the outer peripheral positioning component 201, and is driven by the outer peripheral positioning component 201 to realize movement and rotation. On the one hand, it is positioned by meshing with the outer periphery of the hollow gear, and on the other hand, it is driven to rotate by meshing with the outer periphery of the hollow gear to adjust the unbalanced position of the hollow gear to be opposite to the balance correction component 202; the laser drill 7 is arranged on the balance correction component 202, and a hole is drilled at the unbalanced position of the hollow gear to achieve the purpose of weight reduction and balance; the inner peripheral positioning cylinder 3 is rotatably connected with the test shaft 1 through the through hole 203, and an inner peripheral positioning component 301 is arranged on the inner peripheral positioning cylinder 3. The test shaft 1 transmits the vibration of the hollow gear during rotation through the vibration guide 5 , and is connected to the positioning seat 2 and the inner peripheral positioning cylinder 3 through the connecting member 6 .

[0029] It should be further explained that the outer periphery of the through hole 203 is alternately provided with mounting grooves 1 and 2 in front, back, left and right directions; the two sets of peripheral positioning components 201 are respectively provided in the two sets of mounting grooves 1 and are arranged in a mirror image; the two sets of balance correction components 202 are respectively provided in the two sets of mounting grooves 2 and are arranged in a mirror image.

[0030] The peripheral positioning assembly 201 and the balance correction assembly 202 are arranged in mirror images, and move and work synchronously to maintain the balance of the entire positioning seat 2 and reduce measurement errors.

[0031] like Figure 6 As shown, the peripheral positioning assembly 201 includes a lead screw 20101 driven by a motor 1 and rotating in a mounting groove 1; the lead screw 20101 is provided with a moving block 20102 threadedly connected thereto and horizontally moving along the mounting groove 1; the moving block 20102 is provided with a motor 2 and a mounting rod 20103 driven to rotate by the motor 2. The positioning gear 4 is sleeved on the mounting rod 20103 and fastened by a fixing member 20104.

[0032] It should be further explained that a thread is provided on the mounting rod 20103; the fixing member 20104 is a nut, which moves along the mounting rod 20103 by rotating to tighten the positioning gear 4.

[0033] When performing peripheral positioning, the lead screw 20101 rotates to drive the moving block 20102 to move, and the position of the positioning gear 4 is adjusted to make it mesh with the hollow gear to be tested, so as to achieve the purpose of peripheral positioning. By installing and disassembling the positioning gear 4, a suitable positioning gear 4 is selected to match the hollow gear to be tested.

[0034] like Figure 6 As shown, the balance correction assembly 202 includes a lead screw 20201 driven by a motor 3 and rotating in a mounting groove 2; a moving block 20202 is provided on the lead screw 20201 and is threadedly connected to the lead screw 20201 and moves horizontally along the mounting groove 2. A laser drill 7 is provided on the moving block 20202 and emits laser drilling toward the unbalanced position of the hollow gear.

[0035] Laser drilling uses a high-power density laser beam to irradiate the material being processed, so that the material is quickly heated to the vaporization temperature, thereby evaporating to form holes. This process mainly relies on the principles of photothermal ablation and photochemical ablation, that is, after the processed material absorbs high-energy laser, it is heated to melt and evaporated in a very short time, eventually forming holes. By using laser drilling, an appropriate amount of mass is removed from the unbalanced position of the hollow gear, so that the hollow gear can reach a balanced state. The laser drill 7 drives the horizontal movement along the mounting groove 2 through the rotation of the lead screw 20201, so that the drilling position can be adjusted.

[0036] like Figure 7 As shown, dust collecting boxes 20203 are provided at the upper and lower ends of the second mounting groove; a dust collecting cover 2024 is provided at the air inlet end of the dust collecting box 20203, and the air outlet end is connected to the dust filter box 20207 through a pipe 20205 and an air pump 20206. The dust filter box 20207 is located at the rear end of the positioning seat 2, and a filter element is provided inside the dust filter box 20207.

[0037] It should be further explained that the second mounting groove is an I-shaped groove, the second screw 20201 is arranged along its vertical section, and the dust box 20203 is located on the horizontal section of the second mounting groove and on the upper and lower sides of the second screw 20201.

[0038] Laser drilling will produce smoke and dust accompanied by high temperature. The vacuum pump 20206 forms a negative pressure near the dust hood 2024, which can absorb the smoke and dust, accelerate the cooling of the drilling position, reduce the attachment on the hollow gear, and promote the shaping of the drilling position to ensure the accuracy of the balance test.

[0039] like Figure 8 As shown, the inner circumference positioning cylinder 3 includes a cylinder body 302; one end of the cylinder body 302 passes through the through hole 203 through a one-way bearing 303 and is rotatably connected to the test shaft 1; the rotation direction of the cylinder body 302 is opposite to the rotation direction of the test shaft 1 and the positioning gear 4; the inner circumference positioning component 301 is arranged on the cylinder body 302 to position the inner circumference of the hollow gear along the outer circumference of the cylinder body 302.

[0040] During testing, the cylinder 302 drives the inner circumference positioning assembly 301 to rotate synchronously with the test shaft 1. During calibration, the positioning gear 4 rotates in the test direction, and the hollow gear meshing with it drives the cylinder 302 and the inner circumference positioning assembly 301 to rotate in the opposite direction, that is, during testing, the cylinder 302 and the positioning seat 2 are relatively stationary to ensure the stability of the test, and during calibration, the cylinder 302 and the positioning seat 2 rotate relatively to ensure the stability of the positioning.

[0041] like Fig. 9 As shown, the side wall of the cylinder 302 is provided with an opening which cooperates with the inner circumference positioning component 301, and a cavity which is connected to the opening and for installing the inner circumference positioning component 301 is provided inside; the inner circumference positioning component 301 includes a rotating shaft 30103 which is driven to rotate by motor four 30102 and extends into the cavity; the rotating shaft 30103 is keyed to a bevel gear one 30104; bevel gear two 30106 is arranged in a circle around bevel gear one 30104 and is meshed with it, and each group of bevel gear two 30106 is keyed to a lead screw three 30105 at the same time; a plurality of groups of inner circumference positioning plates 30101 are threadedly connected to the lead screw three 30105 and synchronously slide in and out of the opening.

[0042] It should be further explained that a pressure sensor and an anti-slip pad are provided on the inner peripheral positioning plate 30101 .

[0043] When positioning, the rotating shaft 30103 rotates, driving the bevel gear 2 30106 and the bevel gear 1 30104 to engage and transmit, the screw 3 30105 rotates synchronously, and multiple sets of inner peripheral positioning plates 30101 slide in and out of the opening synchronously, fitting against the inner wall of the hollow gear to position it.

[0044] like Fig.10 As shown, the connecting member 6 includes a mounting ring 601 detachably connected to the positioning seat 2 and opposite to the through hole 203; the mounting sleeve 602 is connected to the through hole 203, one end of which is connected to the mounting ring 601 and the other end of which is detachably connected to the test shaft 1.

[0045] It should be further explained that the mounting ring 601 is connected to the positioning seat 2 via a first screw; and the mounting sleeve 602 is connected to the test shaft 1 via a second screw.

[0046] It should be further explained that the one-way bearing 303 extends into the mounting sleeve 602 and is connected to the test shaft 1 .

[0047] The installation, disassembly and routine maintenance of the device can be achieved through the above-mentioned connecting piece 6.

[0048] like Fig.10 As shown, the vibration guide member 5 includes a vibration guide seat 501 detachably fixed on the positioning seat 2 , a vibration guide ring 503 sleeved on the test shaft 1 , and a vibration guide rod 502 connecting the vibration guide seat 501 and the vibration guide ring 503 .

[0049] It should be further explained that the vibration guide seats 501 are arranged in a circle at equal intervals along the outer circumference of the through hole 203 and are fixed by screws three.

[0050] It should be further explained that the vibration guide rod 502 is an L-shaped bent rod, which is arranged in a one-to-one correspondence with the vibration guide seat 501 to form a claw-shaped structure.

[0051] It should be further explained that the vibration guide ring 503 is coaxial with the hollow gear to be tested, and a vibration reinforcement plate corresponding to the vibration guide rod 502 is arranged on the inner wall of the ring to enhance the vibration on the vibration guide rod 502 to the vibration sensor of the test shaft 1 one by one.

[0052] During the test, the vibration guide seats 501 at different positions capture the vibration on the hollow gear in different areas and transmit it to the vibration guide ring 503 through the vibration guide rod 502. The vibration guide ring 503 then strengthens the vibration of different areas and transmits it to the vibration sensor of the test shaft 1. The above-mentioned vibration transmission corresponds to the actual vibration position of the hollow gear one by one, so the specific position of the unbalanced area of ​​the hollow gear can be accurately determined.

[0053] Embodiment 2: This embodiment proposes a positioning method for a hollow gear dynamic balance test, using the positioning device for a hollow gear dynamic balance test described in Embodiment 1, and the positioning steps are as follows:

[0054] S1. Put the hollow gear to be tested on the cylinder 302 facing the through hole 203; rotate the rotating shaft 30103 to drive the helical gear 2 30106 and the helical gear 1 30104 to mesh and transmit, and the lead screw 3 30105 rotates synchronously, and multiple sets of inner peripheral positioning plates 30101 slide in and out of the opening synchronously to fit the inner wall of the hollow gear to position its inner periphery, so that the hollow gear to be tested is coaxially fixed with the test shaft 1;

[0055] S2, installing the positioning gear 4 matching the hollow gear to be tested on the mounting rod 20103, and tightening the positioning gear 4 by tightening the fixing piece 20104;

[0056] S3, by rotating the lead screw 20101, the moving block 20102 is driven to move, and the position of the positioning gear 4 is adjusted so that it meshes with the hollow gear to be tested, so as to achieve the purpose of positioning its periphery;

[0057] S4, the test shaft 1 of the balancing test machine rotates, and the positioning seat 2 and the inner peripheral positioning cylinder 3 rotate synchronously;

[0058] S5. The vibration guide seats 501 at different positions capture the vibration on the hollow gear in different areas and transmit it to the vibration guide ring 503 through the vibration guide rod 502. The vibration guide ring 503 further transmits the vibration of different areas to the vibration sensor of the test shaft 1; the balancing test machine determines the balance of the hollow gear according to the vibration data;

[0059] S6. According to the test results, the positioning gear 4 rotates, driving the hollow gear and the inner peripheral positioning assembly 301 to rotate synchronously. The second lead screw 20201 rotates, driving the laser drill 7 to move horizontally along the second mounting groove, adjusting the laser emitting end relative to the unbalanced position on the hollow gear, and using the laser drill 7 to drill holes to reduce weight for balance correction;

[0060] S7. During calibration, the vacuum pump 20206 forms negative pressure near the dust collecting hood 2024, which can absorb smoke and dust and accelerate the cooling of the drilling position;

[0061] S8. Perform the balance test again after calibration and adjust repeatedly until the test result meets the standard.

[0062] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A positioning device for hollow gear dynamic balance test, characterized in that: include: A positioning seat (2), wherein a through hole (203) is provided at the center of the positioning seat (2) and the positioning seat (2) is sleeved and fixed to the end of the test shaft (1) through the through hole (203); and a peripheral positioning component (201) and a balance correction component (202) are provided on the periphery of the positioning seat (2); A positioning gear (4) is detachably arranged on the peripheral positioning assembly (201) and is driven by the peripheral positioning assembly (201) to move and rotate. On the one hand, it is positioned by meshing with the outer periphery of the hollow gear, and on the other hand, it is driven to rotate by meshing with the outer periphery of the hollow gear to adjust the unbalanced position of the hollow gear to be opposite to the balance correction assembly (202); A laser drill (7) is arranged on the balance correction component (202) and is used to drill holes at unbalanced positions of the hollow gear to achieve the purpose of weight reduction and balance; And an inner circumference positioning cylinder (3), the inner circumference positioning cylinder (3) is rotatably connected to the test shaft (1) through the through hole (203), and an inner circumference positioning component (301) is arranged on the inner circumference positioning cylinder (3).

2. The positioning device for hollow gear dynamic balance test according to claim 1, characterized in that: The outer periphery of the through hole (203) is provided with mounting grooves one and two alternately in front, back, left and right directions; the two groups of outer periphery positioning components (201) are respectively arranged in the two groups of mounting grooves one and are arranged in a mirror image; the two groups of balance correction components (202) are respectively arranged in the two groups of mounting grooves two and are arranged in a mirror image.

3. The positioning device for hollow gear dynamic balance test according to claim 2, characterized in that: The peripheral positioning assembly (201) comprises a moving block (20102) that moves horizontally along a mounting groove (20102); a rotating mounting rod (20103) is provided on the moving block (20102); The positioning gear (4) is sleeved on the mounting rod (20103) and is fastened by a fixing member (20104).

4. The positioning device for hollow gear dynamic balance test according to claim 2, characterized in that: The balance correction component (202) comprises a second moving block (20202) that moves horizontally along the second mounting groove; The laser drill (7) is arranged on the second moving block (20202) and emits laser to drill toward the unbalanced position of the hollow gear.

5. The positioning device for hollow gear dynamic balance test according to claim 4, characterized in that: Dust boxes (2203) are provided at the upper and lower ends of the second installation slot; a dust cover (224) is provided at the air inlet end of the dust box (20203), and the air outlet end is connected to the dust filter box (20207) through a pipe (2205) and an air pump (20206); The dust filter box (20207) is located at the rear end of the positioning seat (2), and a filter element is arranged inside the dust filter box.

6. The positioning device for hollow gear dynamic balance test according to claim 1, characterized in that: The inner peripheral positioning cylinder (3) comprises a cylinder body (302); one end of the cylinder body (302) passes through the through hole (203) via a one-way bearing (303) and is rotatably connected to the test shaft (1); the rotation direction of the cylinder body (302) is opposite to the rotation direction of the test shaft (1) and the positioning gear (4); The inner circumference positioning component (301) is arranged on the cylinder (302) and positions the inner circumference of the hollow gear along the outer circumference of the cylinder (302).

7. The positioning device for hollow gear dynamic balance test according to claim 6, characterized in that: The side wall of the cylinder (302) is provided with an opening that matches with the inner peripheral positioning component (301), and a cavity that communicates with the opening and is used for installing the inner peripheral positioning component (301) is provided inside; The inner periphery positioning assembly (301) comprises inner periphery positioning plates (30101), and a plurality of groups of inner periphery positioning plates (30101) slide synchronously in and out of the opening.

8. The positioning device for hollow gear dynamic balance test according to claim 6, characterized in that: The test shaft (1) is connected to the positioning seat (2) and the inner peripheral positioning cylinder (3) via a connecting piece (6); The connecting member (6) comprises a mounting ring (601) which is detachably connected to the positioning seat (2) and is located opposite to the through hole (203); a mounting sleeve (602) is connected to the through hole (203), one end of which is connected to the mounting ring (601) and the other end of which is detachably connected to the test shaft (1); The one-way bearing (303) extends into the mounting sleeve (602) and is connected to the test shaft (1).

9. The positioning device for hollow gear dynamic balance test according to claim 1, characterized in that: The test shaft (1) transmits the vibration of the hollow gear during rotation through the vibration guide (5); The vibration guide member (5) comprises a vibration guide seat (501) detachably fixed on the positioning seat (2), a vibration guide ring (503) sleeved on the test shaft (1), and a vibration guide rod (502) connecting the vibration guide seat (501) and the vibration guide ring (503); The vibration guide ring (503) is coaxial with the hollow gear to be tested, and a vibration reinforcement sheet corresponding to the vibration guide rod (502) is arranged on the inner wall of the ring.

10. A positioning method for hollow gear dynamic balance test, characterized in that: The positioning device for dynamic balancing test of hollow gears as claimed in claim 1 is used, and the positioning steps are as follows: the hollow gear to be tested is sleeved on the inner circumference positioning cylinder (3) facing the through hole (203), and the inner wall of the hollow gear is positioned by the inner circumference positioning assembly (301) so that it is coaxial with the test shaft (1); a positioning gear (4) matching the hollow gear to be tested is installed on the outer circumference positioning assembly (201), and the positioning gear (4) is adjusted to mesh with the outer circumference of the hollow gear; the test shaft (1) rotates, the balancing test machine starts working, and the positioning seat (2) and the inner circumference positioning cylinder (3) rotate synchronously; according to the test result, the positioning gear (4) rotates, driving the hollow gear and the inner circumference positioning assembly (301) to rotate synchronously, the unbalanced position on the hollow gear is opposite to the balance correction assembly (202), and the laser drill (7) drills a hole to reduce weight for balance correction.

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