Gearbox oil separation gear balancing fixture

Abstract

The utility model relates to the technical field of the repair and balance of aircraft APU, disclose a gear box oil separation gear balance fixture, including horizontal mechanism and setting at its top balance mechanism, both are connected through the lock catch, be equipped with battery main part and drive motor in horizontal mechanism, through the drive limit wheel and horizontal board bottom's rack structure meshing, drive horizontal board and balance mechanism to carry out automatic horizontal angle adjustment, and balance mechanism provides support through the rotation of connecting rod, utilize the clamping assembly fixed with the fixture mandrel of nut and is measured gear, and realizes axial locking through the cooperation of positioning rod and rotating rod. The utility model solves the problem that the existing dynamic balance measuring equipment relies on horizontal environment and the difficult problem of special-shaped gear clamping, can actively adapt to the non-horizontal operation environment, ensure that the balance mechanism is in the best measurement posture, and effectively eliminate the interference of the tool itself unbalance, significantly improve the precision and flexibility of dynamic balance measurement.

Description

Technical Field

[0001] This utility model relates to the technical field of aircraft APU repair and balancing, and in particular to a gearbox oil separator gear balancing fixture. Background Technology

[0002] In mechanical transmission, the gearbox is a core component, and the dynamic balance quality of the gears inside it directly affects the operational stability, noise level, and service life of the equipment. In particular, for the oil separator gears in the gearbox, since they are usually in a high-speed rotating state, strict dynamic balance tests and corrections must be carried out before assembly to eliminate centrifugal vibration caused by uneven mass distribution.

[0003] Currently, dynamic balancing measurements for such gears mainly rely on specialized dynamic balancing testing equipment in conjunction with appropriate fixtures. These high-precision measuring instruments typically have extremely stringent requirements for the operating environment, the most critical of which is the levelness of the mounting surface. In a standard workshop environment, the equipment is often installed on a pre-cast and strictly leveled concrete base to ensure that the measurement baseline is perpendicular to the direction of gravity, thereby ensuring the accuracy of the sensor data.

[0004] However, in actual production processes, mobile maintenance, or temporary testing scenarios, it is often difficult to guarantee that the working ground or workbench is at the absolute level of a laboratory. When equipment needs to be used on non-standard flat ground such as outdoors or temporary maintenance points, most existing gear balancing fixtures adopt rigid support structures and lack the ability to adjust their horizontal posture independently.

[0005] If the placement plane is tilted, the fixture and the gear to be tested will also tilt, which will cause the rotation axis to make an angle with the direction of gravity, thus introducing additional force interference, resulting in serious deviations in the dynamic balance measurement data. This excessive reliance on the flatness of the ground greatly limits the flexibility and adaptability of dynamic balance testing operations, making it difficult to meet the accurate measurement needs under complex working conditions.

[0006] Therefore, this utility model proposes a gearbox oil separator gear balancing fixture to overcome the shortcomings of the prior art. Summary of the Invention

[0007] To overcome the above shortcomings, this utility model provides a gearbox oil separator gear balancing fixture, which aims to improve the problems of some existing gearbox oil separator gear balancing fixtures that rely too much on the levelness of the mounting plane and lack the ability to adjust their posture independently in outdoor or uneven environments, resulting in large deviations in dynamic balance measurement data.

[0008] This utility model provides a gearbox oil separator gear balancing fixture, including: a horizontal mechanism and a balancing mechanism disposed above the horizontal mechanism, wherein the horizontal mechanism and the balancing mechanism are fixedly connected by a locking buckle.

[0009] The horizontal mechanism includes a battery body serving as a power source and a drive motor. The battery body is electrically connected to the drive motor. The horizontal mechanism also includes a horizontal plate and a limiting wheel. The bottom of the horizontal plate is provided with a rack structure, and the limiting wheel is engaged with the rack structure at the bottom of the horizontal plate.

[0010] Furthermore, the battery body provides the driving force to the horizontal mechanism through the drive motor. The drive motor establishes a transmission connection with the limiting wheel to drive the limiting wheel to rotate. The horizontal plate is configured to rotate under the influence of the movement of the limiting wheel under the meshing driving action of the limiting wheel, thereby driving the horizontal mechanism to adjust the horizontal angle of the balancing mechanism. The latch is used to complete the fixed connection between the horizontal mechanism and the balancing mechanism after the adjustment is completed.

[0011] Preferably, the horizontal mechanism further includes a support block fixedly disposed therein, a limiting plate connected to the support block, and a slot 1 located inside the horizontal plate. The end of the limiting plate is slidably fitted into the slot 1, and the fixed reverse force provided by the limiting plate restricts the movement trajectory of the slot 1, thereby guiding and constraining the rotation angle of the horizontal plate.

[0012] Preferably, a limiting groove is also provided on the horizontal plate. The limiting groove is configured to assist the latch in fixing the position of the horizontal mechanism after the angle adjustment is completed, thereby enhancing the stability after locking.

[0013] Preferably, the balancing mechanism includes a support plate and a connecting rod connected to the support plate. The connecting rod is configured to rotate 90 degrees. When the measurement begins, the gear to be measured is placed on the support plate, and after the connecting rod rotates 90 degrees, it forms a contact support with the gear to be measured or its tooling.

[0014] Preferably, the balancing mechanism further includes a clamping assembly, which consists of a nut and a tooling mandrel. The tooling mandrel is configured to pass through the center hole of the gear under test. The nut and the tooling mandrel are threaded together to fix and lock the gear under test, ensuring the coaxiality and stability of the gear under test. The tooling mandrel is placed on the support plate, and the connecting rod contacts the outer circular surface of the tooling mandrel after rotating ninety degrees.

[0015] Preferably, the balancing mechanism further includes a pulley, and the clamping assembly is provided with a power source. The pulley is fixedly connected or driven to the power output end of the clamping assembly, and a conveyor belt is connected to the pulley. The conveyor belt is used to drive the tooling mandrel to rotate, and the power source is configured to provide driving energy for the operation of the pulley and the conveyor belt.

[0016] Preferably, the balancing mechanism further includes a rotating rod, a second slot formed on the balancing mechanism, and a detachable positioning rod. The positioning rod is configured to be removed and placed in the second slot. The rotating rod is configured to rotate itself to make it tightly contact the second slot, thereby pressing the positioning rod. When the positioning rod is placed in the second slot and locked, one end of the positioning rod contacts the end of the tooling mandrel to restrict the axial movement of the tooling mandrel.

[0017] Preferably, the clamping assembly is also integrated or connected to a measuring instrument, which is configured to perform a balance measurement on the gear to be tested and obtain data. The measuring instrument works in accordance with a specific measurement process, that is, after obtaining the first balance measurement result data, the tooling mandrel and the gear to be tested are removed, the mating position of the two is rotated by 180 degrees and measured again, and finally the two results are combined to obtain the final result after eliminating tooling errors.

[0018] This utility model has the following beneficial effects: 1. This utility model, by setting up a horizontal mechanism with a built-in battery power source, uses a motor to drive the limit wheel to mesh with the rack structure at the bottom of the horizontal plate, thereby driving the horizontal plate and the balancing mechanism above it to automatically adjust the angle. This solves the problem that existing dynamic balancing measuring equipment has extremely high requirements for the horizontality of the installation plane and cannot accurately measure outdoors or on uneven ground. It achieves the technical effect of being able to actively adapt to non-horizontal working environments, ensuring that the balancing mechanism is always in the optimal horizontal measuring posture, and significantly improving the applicability and measurement accuracy of the equipment.

[0019] 2. This utility model, by designing a special clamping assembly consisting of a tooling mandrel and a nut, and in conjunction with a measurement logic of two 180-degree relative rotations, solves the problems that gearbox oil separator gears cannot be directly clamped on conventional balancing machines due to their special bore diameter or shape, and that traditional single measurements cannot eliminate interference from the tooling's own imbalance. It achieves the technical effect of being able to convert irregularly shaped gears into standard rigid rotors for stable testing, and eliminating tooling installation errors by integrating two sets of data, thus significantly improving the accuracy of the final dynamic balance data.

[0020] 3. This utility model solves the problem of axial movement of the gear under test due to centrifugal force or vibration during high-speed rotation measurement by setting a combination locking structure of rotating rod, slot and detachable positioning rod in the balancing mechanism, which leads to the distortion of measurement data. It achieves the technical effects of accurate and stable axial positioning of tooling mandrel and gear, ensuring mechanical stability during rotation, and effectively reducing measurement noise.

[0021] 4. This utility model, by adopting a 90-degree rotatable connecting rod in conjunction with a rolling support structure and a flexible drive method combining pulleys and conveyor belts, solves the problems of high frictional resistance in traditional rigid supports and the direct transmission of vibration from the drive device to the workpiece, which affects sensor readings. It achieves the technical effects of providing effective auxiliary support for the gear under test while reducing frictional loss, isolating drive vibration interference, and further optimizing the dynamic balance measurement environment. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a gearbox oil separator gear balancing fixture proposed in this utility model; Figure 2 This is a schematic diagram of the connecting block of a gearbox oil separator gear balancing fixture tooling proposed in this utility model; Figure 3 This is a schematic diagram of the limiting plate structure of a gearbox oil separator gear balancing fixture tooling proposed in this utility model; Figure 4 This is a schematic diagram of the support plate structure of a gearbox oil separator gear balancing fixture proposed in this utility model.

[0023] Legend: 1. Battery body; 2. Locking latch; 3. Horizontal mechanism; 31. Horizontal plate; 32. Limiting groove; 33. Limiting wheel; 34. Limiting plate; 35. Slot 1; 36. Support block; 4. Balancing mechanism; 41. Rotating rod; 42. Slot 2; 43. Support plate; 44. Positioning rod; 45. Connecting rod; 46. Pulley; 47. Clamping assembly; 471. Nut; 472. Tooling mandrel; 473. Measuring instrument. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example:

[0025] Reference Figures 1 to 4 This utility model provides a gearbox oil separator gear balancing fixture, which aims to solve the technical problems in the prior art where gear dynamic balancing measurement is highly dependent on the horizontal environment and it is difficult to stably clamp, drive and measure oil separator gears of certain specifications on a balancing machine.

[0026] like Figure 1 and Figure 2 As shown, it includes a horizontal mechanism 3 as the base for bottom support adjustment, and a balancing mechanism 4 set above the horizontal mechanism 3. The horizontal mechanism 3 and the balancing mechanism 4 are fixedly connected by a locking buckle 2. The horizontal mechanism 3 is used to provide a horizontal working reference for the balancing mechanism 4 above it through the active adjustment of the internal structure in an uneven environment. The balancing mechanism 4 is used to carry the gear to be tested and to measure and correct the dynamic balance data. The locking buckle 2 is used to ensure that the relative positions of the two parts are fixed after adjustment, ensuring the overall rigidity and safety during the measurement process.

[0027] The horizontal mechanism 3 has a battery body 1 inside. The battery body 1 is electrically connected to a built-in drive motor or other power source as an energy component. The drive motor is configured to provide power to the moving parts inside the horizontal mechanism 3 to drive the horizontal mechanism 3 to adjust the horizontal angle of the balancing mechanism 4. The specific adjustment structure of the horizontal mechanism 3 includes a horizontal plate 31 and a limiting wheel 33. The bottom of the horizontal plate 31 is provided with a rack structure adapted to the limiting wheel 33. The limiting wheel 33 and the rack structure at the bottom of the horizontal plate 31 are connected by meshing. The battery body 1 establishes a transmission connection with the limiting wheel 33 through the drive motor to drive the limiting wheel 33 to rotate. Under the meshing drive of the limiting wheel 33, the horizontal plate 31 rotates around a predetermined axis due to the influence of the movement of the limiting wheel 33, thereby changing the tilt angle of the upper surface of the horizontal plate 31.

[0028] When used on a non-horizontal surface, the battery main body 1 is activated to supply power and drives the limit wheel 33 to rotate via the motor. The engagement between the limit wheel 33 and the bottom of the horizontal plate 31 causes the horizontal plate 31 to rotate, which in turn drives the balancing mechanism 4 fixed on the horizontal plate 31 to adjust its angle synchronously until the balancing mechanism 4 is in a horizontal state. This reduces or eliminates the measurement error caused by the horizontal angle of the installation plane of the balancing mechanism 4. After the adjustment is completed, the locking buckle 2 completes the locking and fixing connection between the horizontal mechanism 3 and the balancing mechanism 4, so that the device enters the test state.

[0029] Please refer to the following carefully. Figure 1 , Figure 2 and Figure 4The support block 36 is fixedly mounted on the internal base of the horizontal mechanism 3. The limiting plate 34 is fixedly connected to the support block 36. The limiting plate 34 is used to provide a fixed reaction force or support reference.

[0030] The slot 35 is opened inside the horizontal plate 31. The end of the limiting plate 34 is slidably fitted in the slot 35. When the horizontal plate 31 rotates under the drive of the limiting wheel 33, the movement trajectory of the slot 35 will be constrained by the limiting plate 34.

[0031] By utilizing the fixed reverse force of the limiting plate 34, the movement trajectory of the slot 35 is restricted and guided, ensuring that the rotation of the horizontal plate 31 is within a predetermined adjustable angle range, thus avoiding excessive rotation or angle loss of control. This sliding fit structure provides high stability and precise limiting function for the adjustment of the horizontal plate 31.

[0032] Meanwhile, a limiting groove 32 is also provided on the upper surface or side of the horizontal plate 31. The limiting groove 32 is used to assist in fixing and accurately positioning the position of the entire horizontal mechanism 3 after the horizontal mechanism 3 has adjusted its angle, through the action of the latch 2, thereby further enhancing the overall stability after horizontal adjustment.

[0033] Reference Figure 1 and Figure 4 The balancing mechanism 4 is equipped with a support plate 43 and a connecting rod 45. The support plate 43 and the connecting rod 45 are fixedly connected or integrally formed. The connecting rod 45 is configured to have a 90-degree rotational freedom, and the contact end of the connecting rod 45 is designed with a smooth contact surface or a rolling structure. When a measurement operation is required, the gear to be measured is placed above the support plate 43. After the connecting rod 45 rotates 90 degrees, it forms a rotatable support contact with the outer surface of the tooling assembly, providing a stable physical reference for subsequent measurement and reducing frictional resistance.

[0034] Reference Figure 3 The balancing mechanism 4 is equipped with a dedicated clamping assembly 47, which mainly consists of a nut 471 and a tooling mandrel 472. The tooling mandrel 472 adopts a through-type design and passes through the center hole of the gear to be tested. The nut 471 is tightened onto the tooling mandrel 472 by thread engagement, thereby firmly locking the gear to be tested onto the tooling mandrel 472, ensuring the stability and coaxiality of the gear to be tested during rotation. After clamping, the tooling mandrel 472 is placed on the support plate 43, and the connecting rod 45 directly contacts the outer cylindrical surface of the tooling mandrel 472 after rotating ninety degrees, completing the initial support of the workpiece to be tested.

[0035] The clamping assembly 47 is equipped with a power supply to provide power support. The balancing mechanism 4 also includes a pulley 46. The pulley 46 is connected to the power end of the clamping assembly 47 through a driving device such as a motor. A conveyor belt is connected to the outer circumference of the pulley 46. The other end of the conveyor belt is sleeved on the tooling mandrel 472 or the driven wheel connected to it. The power supply drives the pulley 46 to rotate through the drive circuit, and then drives the tooling mandrel 472 and the gear to be tested to rotate at high speed through the conveyor belt to meet the speed requirements required for dynamic balance measurement.

[0036] Reference Figure 4 The balancing mechanism 4 also integrates a rotating rod 41, a second slot 42, and a positioning rod 44. The second slot 42 is formed on the main body structure of the balancing mechanism 4. The positioning rod 44 is designed as a detachable structure, which can be removed and placed inside the second slot 42. The rotating rod 41 is arranged adjacent to or connected to the second slot 42. The rotating rod 41 can press or fit against the second slot 42 by its own rotation, thereby fixing and locking the positioning rod 44. At this time, the end of the positioning rod 44 extends to the tooling mandrel 472 and contacts the end of the tooling mandrel 472, realizing the axial precise positioning of the tooling mandrel 472 and preventing axial movement during the measurement process.

[0037] The clamping assembly 47 also integrates or connects a measuring instrument 473. The measuring instrument 473 is equipped with a vibration sensor or a displacement sensor to collect the unbalance data of the gear under test during rotation in real time. The measuring instrument 473 performs high-precision measurement in accordance with a specific operating procedure. That is, after the measuring instrument 473 obtains the first balance measurement result data, the tooling mandrel 472 and the gear under test are removed. The mating position of the tooling mandrel 472 and the gear under test is rotated by 180 degrees, re-clamped, and a second measurement is performed. The measuring instrument 473 performs a comprehensive calculation on the two results to eliminate the influence of the unbalance of the tooling itself on the measurement result.

[0038] The working principle is as follows: In response to the situation where the working surface is not level, the leveling mechanism 3 initiates an automatic adjustment process. The battery body 1 built into the leveling mechanism 3 provides power to the motor, which drives the limit wheel 33 to rotate through the transmission structure. Since the limit wheel 33 is meshed with the rack structure at the bottom of the level plate 31, the rotation of the limit wheel 33 directly causes the level plate 31 to deflect or tilt, thereby correcting the horizontal angle of the balancing mechanism 4 fixed on the level plate 31. During this process, the limit plate 34 connected to the support block 36 slides in the slot 35 inside the level plate 31. The fixed reverse force of the limit plate 34 accurately guides and restricts the movement trajectory of the slot 35 and the level plate 31. After adjustment to a level state, the leveling mechanism 3 and the balancing mechanism 4 are fixed and locked together by the latch 2 to ensure the stability of the subsequent measurement benchmark.

[0039] When the dynamic balance stability of the gear is measured, the operator first passes the tooling mandrel 472 in the clamping assembly 47 through the center hole of the gear to be tested, and tightens the fit with the nut 471 to firmly fix the gear to be tested on the tooling mandrel 472, ensuring the tightness and coaxiality of the gear to be tested and the tooling mandrel 472. Then, the assembled tooling mandrel 472 and gear are placed on the support plate 43, and the connecting rod 45 is rotated 90 degrees so that the connecting rod 45 contacts the outer circular surface of the tooling mandrel 472 to form a rotatable auxiliary support.

[0040] To drive the gear under test to rotate, the power supply set on the clamping assembly 47 is turned on. The power supply drives the motor connected to the pulley 46 to rotate. The pulley 46 drives the conveyor belt connected to the pulley 46 to rotate. The friction of the conveyor belt drives the tooling mandrel 472 and the gear under test to rotate at high speed. At the same time, in order to prevent the workpiece from moving axially during rotation, the positioning rod 44 is taken out and placed in the second slot 42. The rotating rod 41 is rotated to make it come into close contact with the second slot 42 and press the positioning rod 44. At this time, the other end of the positioning rod 44 abuts against the end face of the tooling mandrel 472, completing the axial positioning.

[0041] After the rotation stabilizes, the first balance measurement of the gear under test is performed using measuring instrument 473 and the data is recorded. In order to eliminate the influence of manufacturing errors in the tooling itself on the measurement results, the tooling mandrel 472 and the gear under test are removed, the nut 471 is loosened, the mating position of the gear under test and the tooling mandrel 472 is rotated by 180 degrees, and then tightened and installed back on the balancing mechanism 4 for the second dynamic balance measurement. Finally, the two measurement results are combined and calculated to obtain the final accurate dynamic balance data of the gear under test.

Claims

1. A gearbox oil separator gear balancing fixture, comprising a horizontal mechanism (3) and a balancing mechanism (4) disposed above the horizontal mechanism (3), wherein the horizontal mechanism (3) and the balancing mechanism (4) are fixedly connected by a latch (2); Its features are, The horizontal mechanism (3) is provided with a battery body (1) inside. The battery body (1) is configured to provide power to the horizontal mechanism (3) so as to drive the horizontal mechanism (3) to adjust the horizontal angle of the balancing mechanism (4). The horizontal mechanism (3) also includes a horizontal plate (31) and a limiting wheel (33). The limiting wheel (33) is engaged with the bottom of the horizontal plate (31). The battery body (1) is connected to the limiting wheel (33) to drive the limiting wheel (33). The horizontal plate (31) rotates due to the movement of the limiting wheel (33). When used in a non-horizontal plane, the limiting wheel (33) is driven by the battery body (1), and the rotation of the horizontal plate (31) reduces the measurement influence of the balancing mechanism (4) caused by the horizontal angle problem. The fixed connection between the horizontal mechanism (3) and the balancing mechanism (4) is completed by the latch (2).

2. The gearbox oil separator gear balancing fixture according to claim 1, characterized in that, The horizontal mechanism (3) also includes a support block (36), a limiting plate (34), and a slot (35); The support block (36) is fixedly installed inside the horizontal mechanism (3), and the limiting plate (34) is connected to the support block (36); The slot 1 (35) is located inside the horizontal plate (31), and the limiting plate (34) is slidably fitted inside the slot 1 (35). The fixed reverse direction of the limiting plate (34) restricts the movement trajectory of the slot 1 (35).

3. The gearbox oil separator gear balancing fixture according to claim 1, characterized in that, The horizontal plate (31) is also provided with a limiting groove (32), which is configured to fix the position of the horizontal mechanism (3).

4. The gearbox oil separator gear balancing fixture according to claim 1, characterized in that, The balancing mechanism (4) includes a support plate (43) and a connecting rod (45). The support plate (43) is connected to the connecting rod (45), which is configured to rotate ninety degrees. The balancing mechanism (4) is configured such that when the measurement begins, the gear to be measured is placed on the support plate (43), and the connecting rod (45) is rotated ninety degrees to contact the gear to be measured.

5. The gearbox oil separator gear balancing fixture according to claim 4, characterized in that, The balancing mechanism (4) further includes a clamping assembly (47), which includes a nut (471) and a tooling mandrel (472). The tooling mandrel (472) is configured to pass through the gear to be tested, and the nut (471) cooperates with the tooling mandrel (472) to fix the gear to be tested and ensure the stability of the gear to be tested; The tooling mandrel (472) is placed on the support plate (43), and the connecting rod (45) comes into contact with the tooling mandrel (472) after rotating ninety degrees.

6. The gearbox oil separator gear balancing fixture according to claim 5, characterized in that, The balancing mechanism (4) further includes a pulley (46), and a power supply is provided on the clamping assembly (47); The pulley (46) is fixedly connected to the clamping assembly (47), and a conveyor belt is connected to the pulley (46); The power supply is configured to drive the pulley (46).

7. The gearbox oil separator gear balancing fixture according to claim 5, characterized in that, The balancing mechanism (4) also includes a rotating rod (41), a second slot (42), and a positioning rod (44). The second slot (42) is disposed on the balancing mechanism (4), and the positioning rod (44) is configured to be removed and placed in the second slot (42); The rotating rod (41) is configured to make it in close contact with the second slot (42) by rotating; When the positioning rod (44) is placed in the second slot (42), one end of the positioning rod (44) contacts the tooling mandrel (472).

8. A gearbox oil separator gear balancing fixture according to claim 6, characterized in that, The clamping assembly (47) is also equipped with a measuring instrument (473); The measuring instrument (473) is configured to perform balance measurement on the gear under test and obtain data; After the measuring instrument (473) obtains the first balance measurement result data, the tooling mandrel (472) and the gear to be measured are removed, the mating position of the two is rotated by 180 degrees and measured again, and the two results are combined to obtain the final result.

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