A bearing span detection device and method for a transmission gearbox gear shaft

Abstract

The present invention belongs to the technical field of bearing span detection, and discloses a bearing span detection device and method for a gear shaft of a transmission casing, including a precision moving module. There is a product fixture one and a precision contact displacement sensor on the precision moving module. There are two groups of fixture lifting modules on one side of the precision moving module. A product fixture two and a sensor fixture two are respectively installed on each fixture lifting module. A precision contact displacement sensor is fixed on the sensor fixture two. The product fixture one and the product fixture two are used to fix the gear shaft product. The precision contact displacement sensor is used for the detection of the gear shaft assembly. The two groups of lifting mounting seats ensure the horizontal position of the gear shaft product, and realize the detection of gear shaft assemblies of different specifications and models. The device of the present invention realizes the detection of press-fitted bearings with different spans and different specifications through the forward and backward movement of the precision displacement module in cooperation with the sensor and the up and down movement of the fixture lifting module. The structure is simple and the operation is stable, and it can effectively realize automatic detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of bearing span detection, and particularly relates to a bearing span detection device and method for a gear shaft of a transmission case. Background Technique

[0002] During the assembly stage of the accessory drive case of an aircraft engine, it is necessary to measure the bearing spacing of the assembled gear shaft. The span between the two bearings involves different sizes and the bearing specifications and models are also different. Generally, manual measurement methods are used on-site. However, relying solely on manual inspection has low efficiency and poor accuracy, seriously affecting the safety of aviation products, and it is impossible to fully achieve data collection of information and docking with automated equipment during the manual measurement process. Summary of the Invention

[0003] The purpose of the present invention is to provide a bearing span detection device and method for a gear shaft of a transmission case to solve the above technical problems.

[0004] To solve the above technical problems, the specific technical solutions of a bearing span detection device and method for a gear shaft of a transmission case of the present invention are as follows:

[0005] A bearing span detection device for a gear shaft of a transmission case includes a precision moving module. A product fixture one and a precision contact displacement sensor are provided on the precision moving module. The precision moving module is used to horizontally move the product fixture one and the precision contact displacement sensor to meet the detection of transmission case gear shaft components with different spans. On one side of the precision moving module, there are two sets of fixture lifting modules. A product fixture two and a sensor fixture two are respectively installed on each fixture lifting module. A precision contact displacement sensor is fixed on the sensor fixture two. The fixture lifting module is used to lift and lower the precision contact displacement sensor and the product fixture two. The product fixture one and the product fixture two are used to fix the gear shaft product. The precision contact displacement sensor is used for the detection of the gear shaft component. The two sets of lifting mounting seats ensure the horizontal position of the gear shaft product and realize the detection of gear shaft components with different specifications and models.

[0006] Further, a precision module moving plate is installed on the precision moving module. The precision module moving plate is fixedly connected to a sensor lifting module one and the product fixture one. A sensor fixture one is fixedly connected to the sensor lifting module one. The precision contact displacement sensor is installed on the sensor lifting module one through the sensor fixture one. The sensor lifting module one is used to lift and lower the precision contact displacement sensor.

[0007] Further, lifting mounting seats are respectively installed on the fixture lifting modules. The product fixture two and the sensor fixture two are respectively fixed on the lifting mounting seats.

[0008] Furthermore, bearing outer ring baffles are installed on both sides of the product tooling one and the product tooling two, so that the product will not move back and forth during the detection process.

[0009] Furthermore, the precision contact displacement sensor is a pneumatic sensor. When ventilated, the probe in the front extends, and the inner rings on both sides of the bearing are automatically contacted through ventilation to feedback the span value between the two bearings.

[0010] Furthermore, the stroke of the tooling lifting module is 200 mm.

[0011] Furthermore, the measurement accuracy of the precision contact displacement sensor reaches 0.0015 mm, and the stroke is 10 mm.

[0012] Furthermore, the tooling lifting module and the sensor lifting module one achieve position control through PLC.

[0013] The present invention also discloses a detection method for a bearing span detection device of a transmission case gear shaft, including the following steps:

[0014] Step: Statistically collect the spans of all gear shaft bearings to be detected and the inner and outer diameter sizes of the corresponding bearings at both ends in advance. According to the spans of all gear shaft bearings, input corresponding movement data into the precision movement module through PLC for movement in the front and back directions, ensuring that the sensors at both ends can contact the inner ring of the bearing and feedback values when the product is placed on the tooling.

[0015] Step: Then, according to the outer diameter values of the bearings at both ends of the current gear shaft bearing product, calculate the height difference between the outer diameter center dimensions of the two bearings when they are respectively placed on the corresponding product tooling one and the product tooling two. Input the height difference through PLC to realize the up and down lifting of the tooling lifting module. Through the height compensation of the front and back product toolings, the product placed on the tooling is in a horizontal state at this time.

[0016] Step: Then, according to the inner diameter values of the bearings at both ends of the current gear shaft bearing product and the height difference between the outer diameter center heights, calculate the height difference between the inner diameter center dimensions of the two bearings when they are respectively placed on the corresponding product tooling one and the product tooling two. Input the height difference through PLC to realize the up and down lifting of the tooling lifting module and the sensor lifting module one, ensuring that the front and back detection sensors can contact the middle position of the inner ring of the bearing.

[0017] Step: Record the model of the current specification gear shaft and all corresponding module data and number them. By analogy, different specification gear shaft products are processed.

[0018] Steps: Before the detection is required, input the corresponding number of the gear shaft to be detected into the PLC. Then, each module runs to the required moving position respectively. After that, place the product to be detected on the detection device. The outer rings of the bearings at both ends approach the bearing outer ring baffles respectively. Then, supply air to the precision contact displacement sensor to make the probe extend. The two probes contact the inner rings of the bearings at both ends respectively, so that the sensor measurement values can be obtained. By comparing the extended values of the sensors and the moving amounts of the precision moving modules with the theoretical values, the actual span between the two bearings of the currently measured gear shaft product can be calculated to complete the detection process.

[0019] The bearing span detection device and method for the gear shaft of the transmission case of the present invention have the following advantages:

[0020] The device of the present invention realizes the detection of different spans and different specifications of press-fitted bearings through the forward and backward movement of the precision displacement module in cooperation with the sensor and the up and down movement of the tooling lifting module. The structure is simple and the operation is stable. It can effectively realize automatic detection and is convenient for equipment integration. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the bearing span detection device for the gear shaft of the transmission case of the present invention;

[0022] Figure 2 It is a schematic structural diagram when the bearing span detection device for the gear shaft of the transmission case of the present invention is in use;

[0023] Explanation of the marks in the figure: 1. Precision moving module; 2. Sensor lifting module one; 3. Precision contact displacement sensor; 4. Sensor tooling one; 5. Product tooling one; 6. Bearing outer ring baffle; 7. Gear shaft product; 8. Product tooling two; 9. Sensor tooling two; 10. Lifting mounting seat; 11. Tooling lifting module; 12. Precision module moving plate; 13. Module mounting seat one; 14. Module mounting seat two. Detailed Embodiment

[0024] In order to better understand the purpose, structure and function of the present invention, the following further detailed description is made on the bearing span detection device and method for the gear shaft of the transmission case of the present invention in conjunction with the drawings.

[0025] Such as Figure 1As shown in the figure, a bearing span detection device for the gear shaft of a transmission casing according to the present invention includes a precision moving module 1. A precision module moving plate 12 is installed on the precision moving module 1. The precision module moving plate 12 is fixedly connected to a sensor lifting module 1-2 and a product fixture 1-5. The product fixture 1-5 is used to fix the gear shaft product. The precision moving module 1 is used to horizontally move the sensor lifting module 1-2 and the product fixture 1-5. A sensor fixture 1-4 is fixedly connected to the sensor lifting module 1-2. A precision contact displacement sensor 3 is installed on the sensor lifting module 1-2 through the sensor fixture 1-4. The sensor lifting module 1-2 is used to lift the precision contact displacement sensor 3. During the detection process, the precision contact displacement sensor 3 and the product fixture 1-5 can be moved back and forth to meet the detection of different span transmission casing gear shaft components. At the same time, there are two groups of fixture lifting modules 1-1 for fixing fixtures on the left side of the precision moving module 1. Lifting mounting seats 1-0 are respectively installed on each fixture lifting module 1-1. A product fixture 2-8 and a sensor fixture 2-9 are respectively fixed on the lifting mounting seats 1-0. The product fixture 2-8 is used to fix the gear shaft product. A precision contact displacement sensor 3 is fixed on the sensor fixture 2-9. The two groups of lifting mounting seats 1-0 are respectively used to realize the lifting of the precision contact displacement sensor 3 and the product fixture 2-8, ensuring the horizontal position of the product during the placement of the product in this structure, and realizing the detection of different specifications and models of gear shaft components. At the same time, bearing outer ring baffles 6 are installed on both sides of the product fixture 1-5 and the product fixture 2-8, so that the product will not move back and forth during the detection process.

[0026] Through the lifting process of a group of fixture lifting modules 1-1, it can simultaneously meet the change of the product outer diameter size. At the same time, through the combined use of a group of fixture lifting modules 1-1 and the sensor lifting module 1-2, it is ensured that the two groups of precision contact displacement sensors 3 can contact the inner ring position of the bearing simultaneously during the detection process. The precision contact displacement sensor 3 used simultaneously adopts a pneumatic sensor. The probe in front can extend in the ventilated state. During the use process, it automatically contacts the inner rings on both sides of the bearing through ventilation, and feeds back the span value between the two bearings, avoiding the damage caused by the contact of the sensor during the placement of the product.

[0027] The stroke of the fixture lifting module 1-1 is 200 mm, and the measurement accuracy of the precision contact displacement sensor 3 reaches 0.0015 mm, with a stroke of 10 mm, which can meet the span detection requirements of most gear shafts.

[0028] The fixture lifting module 1-1 and the sensor lifting module 1-2 are position-controlled by a PLC, which is convenient for equipment integration and realizes automatic docking.

[0029] As Figure 2 shown, the bearing span detection method for the transmission casing gear shaft of the present invention includes the following steps:

[0030] Step 1: In the preliminary stage, statistically analyze the spans of all gear shaft bearings to be detected, as well as the inner and outer diameter dimensions of the corresponding bearings at both ends. According to the spans of all gear shaft bearings, input the corresponding movement data into the precision movement module 1 through the PLC to move in the front and back directions, ensuring that the sensors at both front and back ends can contact the inner ring of the bearing and feed back values when the product is placed on the tooling;

[0031] Step 2: Then, based on the outer diameter values of the bearings at both ends of the current gear shaft bearing product, calculate the height difference between the center dimensions of the outer diameters of the two bearings when they are respectively placed on the corresponding product tooling one 5 and product tooling two 8. Input the height difference through the PLC to achieve the up and down lifting of the tooling lifting module 11. Through the height compensation of the front and back product toolings, the product placed on the tooling is in a horizontal state at this time;

[0032] Step 3: Then, based on the inner diameter values of the bearings at both ends of the current gear shaft bearing product and the height difference of the center height of the outer diameter, calculate the height difference between the center dimensions of the inner diameters of the two bearings when they are respectively placed on the corresponding product tooling one 5 and product tooling two 8. Input the height difference through the PLC to achieve the up and down lifting of the tooling lifting module 11 and the sensor lifting module one 2, ensuring that the front and back detection sensors can contact the middle position of the inner ring of the bearing;

[0033] Step 4: Record the model of the current specification gear shaft and all corresponding module data and number them. And so on for gear shaft products of different specifications;

[0034] Step 5: Before the detection is required, after inputting the corresponding number of the gear shaft to be detected into the PLC, each module runs to the required moving position respectively. Then place the product to be detected on the detection device. The outer rings of the bearings at both ends are respectively close to the bearing outer ring baffle 6. Then, supply air to the precision contact displacement sensor 3 to make the probe extend. The two probes respectively contact the inner rings of the bearings at both ends, so that the sensor measurement values can be obtained. By comparing the extended value of the sensor, the moving amount of the precision movement module 1 with the theoretical value, the actual span between the two bearings of the currently measured gear shaft product is calculated to complete the detection process.

[0035] It can be understood that the present invention is described through some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present invention, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. Detection method of bearing span of transmission case gear shaft, the bearing span detection device includes a precision moving module (1), on which there is a product fixture one (5) and a precision contact displacement sensor (3). The precision moving module (1) is used to horizontally move the product fixture one (5) and the precision contact displacement sensor (3) to meet the detection of transmission case gear shaft assemblies with different spans. On one side of the precision moving module (1), there are two sets of fixture lifting modules (11). On each fixture lifting module (11), a product fixture two (8) and a sensor fixture two (9) are respectively installed. A precision contact displacement sensor (3) is fixed on the sensor fixture two (9). The fixture lifting module (11) is used to lift the precision contact displacement sensor (3) and the product fixture two (8). The product fixture one (5) and the product fixture two (8) are used to fix the gear shaft product (7). The precision contact displacement sensor (3) is used for the detection of the gear shaft assembly. Two sets of lifting mounting seats (10) ensure the horizontal position of the gear shaft product (7) to achieve the detection of gear shaft assemblies of different specifications and models. A precision module moving plate (12) is installed on the precision moving module (1). The precision module moving plate (12) is fixedly connected to the sensor lifting module one (2) and the product fixture one (5). The sensor lifting module one (2) is fixedly connected to a sensor fixture one (4). The precision contact displacement sensor (3) is installed on the sensor lifting module one (2) through the sensor fixture one (4). The sensor lifting module one (2) is used to lift the precision contact displacement sensor (3); It is characterized in that The detection method includes the following steps: Step 1: Statistically collect the spans of all gear shaft bearings to be detected and the inner and outer diameter sizes of the corresponding bearings at both ends in advance. According to the spans of all gear shaft bearings, input the corresponding moving data through the PLC in the precision moving module (1) for forward and backward movement to ensure that the sensors at both ends can contact the inner ring of the bearing and feedback values when the product is placed on the fixture; Step 2: Then, according to the outer diameter values of the bearings at both ends of the current gear shaft bearing product, calculate the height difference between the outer diameter center dimensions of the two bearings when they are respectively placed on the corresponding product fixture one (5) and product fixture two (8). Input the height difference through the PLC to realize the up and down lifting of the fixture lifting module (11). Through the height compensation of the front and rear product fixtures, the product placed on the fixture is in a horizontal state at this time; Step 3: Then, according to the inner diameter values of the bearings at both ends of the current gear shaft bearing product and the height difference of the outer diameter center height, calculate the height difference between the inner diameter center dimensions of the two bearings when they are respectively placed on the corresponding product fixture one (5) and product fixture two (8). Input the height difference through the PLC to realize the up and down lifting of the fixture lifting module (11) and the sensor lifting module one (2) to ensure that the front and rear detection sensors can contact the middle position of the inner ring of the bearing; Step 4: Record the current specification of the gear shaft model and all corresponding module data and number them. By analogy, for gear shaft products (7) of different specifications; Step 5: After inputting the corresponding number of the gear shaft to be detected into the PLC as required before detection, each module runs to the required moving position respectively, and then the product to be detected is placed on the detection device. The outer rings of the bearings at both ends are respectively close to the bearing outer ring baffles (6), and then the pneumatic precision contact displacement sensor (3) is ventilated to make the probe extend. The two probes respectively contact the inner rings of the bearings at both ends, so that the sensor measurement values can be obtained. By comparing the extended sensor values and the moving amounts of the precision moving module (1) with the theoretical values, the actual span between the two bearings of the currently measured gear shaft product (7) is calculated to complete the detection process.

2. The detection method according to claim 1, wherein Lifting mounting seats (10) are respectively installed on the tooling lifting module (11), and product tooling two (8) and sensor tooling two (9) are respectively fixed on the lifting mounting seats (10).

3. The detection method according to claim 1, wherein Bearing outer ring baffles (6) are installed on both sides of the product tooling one (5) and the product tooling two (8) to prevent the product from moving back and forth during the detection process.

4. The detection method according to claim 1, characterized in that The precision contact displacement sensor (3) is a pneumatic sensor. In the ventilated state, the front probe extends, and automatic contact with the inner rings on both sides of the bearing is achieved through ventilation to feedback the span value between the two bearings.

5. The detection method according to claim 1, characterized in that The stroke of the tooling lifting module (11) is 200 mm.

6. The detection method according to claim 1, wherein The measurement accuracy of the precision contact displacement sensor (3) reaches 0.0015 mm, and the stroke is 10 mm.

7. The detection method according to claim 1, wherein The tooling lifting module (11) and the sensor lifting module one (2) achieve position control through the PLC.

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