A device for automatically measuring the amount of blow-by

Abstract

This application discloses an automatic axial movement measurement device, including a mounting frame, a clamping mechanism, a compensation mechanism, a first sensor, and a second sensor. The clamping mechanism is mounted on the mounting frame and is used to connect a gear shaft. Along the axial direction of the clamping mechanism, the clamping mechanism can reciprocate relative to the mounting frame. The compensation mechanism includes an abutment portion and a transition structure. Along the axial direction of the clamping mechanism, the abutment portion is inserted into the transition structure and is slidably connected to it. The transition structure is connected to the mounting frame. Using the device provided in this application, when the outer shell of the product to be measured bends downward due to the external force of the clamping mechanism, the abutment portion can move synchronously with the movement of the outer shell. Simultaneously, the two sensors acquire the values ​​of the moving distances of the clamping mechanism and the abutment portion, and the difference between the two values ​​represents the axial movement of the gear shaft. Compared with the prior art, this device can automatically measure the axial movement and effectively improve the measurement accuracy and efficiency of the gear shaft's axial movement.

Description

Technical Field

[0001] This application relates to the field of gear shaft detection technology, and in particular to an automatic measurement device for misalignment. Background Technology

[0002] Gear systems generally include two major series: fixed-axis gear systems and planetary gear systems. They can realize split-path transmission and speed change transmission, and are widely used in the automotive assembly field and the military industry.

[0003] The aircraft gearbox is a core structural component of an aero-engine, often referred to as the engine's "skeleton." It houses the gear train, and during engine operation, a major source of noise is low gear meshing precision. Specifically, during the meshing transmission between the driving and driven gears, the resulting excitations (including stiffness excitation, transmission error excitation, and meshing impact excitation) cause periodic vibrations in the gearbox, generating noise that directly impacts the engine's lifespan. Therefore, before an engine leaves the factory, the axial runout of the gear shafts housing the gear train must be inspected. Currently, the measurement of axial runout of the gear shafts inside the engine is mostly done manually through random checks, resulting in low accuracy and efficiency.

[0004] Therefore, how to improve the measurement accuracy and efficiency of the axial movement of gear shafts has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This application provides an automatic axial movement measurement device to improve the measurement accuracy and efficiency of axial movement of gear shafts.

[0006] This application provides an automatic measurement device for cross-contamination. The product to be measured includes a gear shaft and a housing, with the gear shaft mounted on the housing. The automatic measurement device for cross-contamination includes a mounting frame, a clamping mechanism, a compensation mechanism, a first sensor, and a second sensor. The clamping mechanism is mounted on the mounting frame, wherein the clamping structure is used to connect the gear shaft, and the clamping mechanism reciprocates relative to the mounting frame along the axial direction of the clamping mechanism. The compensation mechanism includes an abutment portion and a transition structure. Along the axial direction of the clamping mechanism, the abutment portion is inserted into the transition structure and is slidably connected to the transition structure. The transition structure is connected to the mounting frame. When the clamping mechanism is used to drive the gear shaft to reciprocate, the abutment portion abuts against the surface of the housing along the axial direction of the clamping mechanism. The first sensor is used to detect the displacement of the clamping mechanism, and the second sensor is used to detect the displacement of the abutment portion.

[0007] As the clamping mechanism drives the gear shaft to reciprocate axially, the clamping mechanism exerts a downward force on the gear shaft. When the gear shaft of the product being measured is subjected to pressure, it will cause a local downward bending of the product's outer casing. Consequently, the downward displacement of the gear shaft will be greater than the amount of movement of the gear shaft within the mounting hole of the outer casing. In other words, the downward displacement of the clamping mechanism detected by the first sensor is greater than the actual axial movement of the gear shaft. Therefore, using the automatic axial movement measuring device provided in this application, a compensation mechanism is set up simultaneously with the clamping mechanism. First, the clamping mechanism is connected to the gear shaft, and then the abutment part is made to abut against the shell of the product to be measured. During the axial reciprocating movement of the gear shaft driven by the clamping mechanism, the abutment part can always abut against the shell of the product to be measured. During the process of the shell bending down or springing back due to the external force of the clamping mechanism, the abutment part can move synchronously with the movement of the shell. At the same time, the second sensor can detect the displacement of the abutment part. When the clamping mechanism drives the gear shaft to move axially to abut against the lower end face of the mounting hole of the shell, the two sensors obtain corresponding values. At this time, the difference between the first sensor and the second sensor is defined as the first value. Then, when the clamping mechanism drives the gear shaft to move axially to abut against the upper end face of the mounting hole of the shell, the two sensors obtain corresponding values. At this time, the difference between the first sensor and the second sensor is defined as the second value. The difference between the first value and the second value is the actual axial movement of the gear shaft. Compared with existing technologies, this device can automatically measure the axial movement of the gear shaft and effectively improve the measurement accuracy and efficiency of the axial movement of the gear shaft.

[0008] In one possible implementation of this application, the abutting part includes a first rod, a second rod, and a first connector. The first rod and the second rod are spaced apart along the radial direction of the clamping mechanism and extend along the axial direction of the clamping mechanism and are inserted into the adapter structure. The first rod is connected to the second rod through the first connector, and the first rod is used to abut against the surface of the housing. The probe of the second sensor is used to connect to the first connector.

[0009] In one possible implementation of this application, the adapter structure includes a limiting groove along the axial direction of the clamping mechanism. The limiting groove includes two spaced-apart sidewalls, and a first rod passes through the two sidewalls. A first connector is connected to the first rod located between the two sidewalls.

[0010] In one possible implementation of this application, the compensation mechanism further includes an elastic element, and the second sensor includes a sensor body and a probe. The sensor body is disposed in the adapter structure and is connected to the probe through the elastic element; the probe is used to connect to the abutment part.

[0011] In one possible implementation of this application, the adapter structure further includes a second connector, a third connector, and a first linear guide rail. The first linear guide rail extends along the axial direction of the clamping mechanism and is slidably connected to the mounting bracket via the second connector. The third connector is slidably connected to the first linear guide rail, and the abutment portion is inserted into the third connector.

[0012] In one possible implementation of this application, the automatic measurement device for cross-sectional area includes a pulley, a connecting rope, a counterweight, and a cylinder. The pulley is mounted on a mounting frame, and the connecting rope is hung on the pulley. Along the direction of gravity, one end of the connecting rope is connected to the counterweight, and the other end is connected to the clamping mechanism. The weight of the counterweight is equal to the weight of the clamping mechanism. The cylinder is mounted on the mounting frame and is used to drive the clamping mechanism to move.

[0013] In one possible implementation of this application, the mounting bracket includes a first mounting plate and a support structure. Along the axial direction of the clamping mechanism, there is a gap between the mounting surface of the first mounting plate and the mounting surface of the support structure, and a pulley is disposed on the mounting surface. The clamping mechanism includes a guide post, a clamping part, and a fourth connecting member. Along the axial direction of the clamping mechanism, the guide post passes through the first mounting plate, with one end connected to the clamping part and the other end located in the gap and connected to the fourth connecting member. A cylinder is located between the fourth connecting member and the first mounting plate, wherein the cylinder body of the cylinder is mounted on the first mounting plate, and the cylinder push rod of the cylinder is connected to the fourth connecting member.

[0014] In one possible implementation of this application, the clamping part includes a second mounting plate and a jaw structure. Along the axial direction of the clamping mechanism, the second mounting plate is closer to the first mounting plate relative to the jaw structure and is connected to one end of the guide post. The automatic measurement device further includes a support part, an adjustment part, and a connecting shaft. The adjustment part is disposed on the support part and moves along the axial direction of the clamping mechanism. Along the axial direction of the clamping mechanism, the jaw structure is provided with a positioning hole on the side facing the second mounting plate. At least a portion of the connecting shaft and at least a portion of the support part are located between the second mounting plate and the jaw structure. One end of the connecting shaft is connected to the jaw structure, and the other end is engaged with the second mounting plate. One end of the support part is used to insert into the positioning hole, and the other end is used to pass through the second mounting plate. The adjustment part is used to abut against the plate surface of the second mounting plate on the side close to the jaw structure.

[0015] In one possible implementation of this application, the automatic measurement device for cross-sectional area slidably connects to a base and a third mounting plate along the axial direction of the clamping mechanism and to the third mounting plate along the radial direction of the clamping mechanism.

[0016] In one possible implementation of this application, the clamping mechanism is used to insert into and tighten the shaft hole of the gear shaft, or to clamp the outer wall of the gear shaft. Attached Figure Description

[0017] Figure 1A schematic diagram of the automatic measurement device for cross-current provided in this application; Figure 2 for Figure 1 A partial schematic diagram of the provided automatic cross-flow measurement device; Figure 3 for Figure 2 A magnified view of point A in the image; Figure 4 This is a partial schematic diagram of the outer shell of the product to be measured under external force. Figure 5 for Figure 2 A diagram from another perspective; Figure 6 for Figure 5 A magnified view of section B in the image; Figure 7 for Figure 1 A schematic diagram of the base structure of the provided automatic measurement device for cross-flow.

[0018] Reference numerals: 01-Product to be measured; 02-Gear shaft; 03-Housing; 031-Mounting hole; 0311-Lower end face; 0312-Upper end face; 1-Mounting bracket; 11-First mounting plate; 12-Bracket structure; 121-Bracket mounting plate; 122-Column; 2-Clamping mechanism; 21-Guide column; 22-Clamping part; 221-Second mounting plate; 222-Claw structure; 2221 Pneumatic chuck; 2222-Pneumatic claw; 23-Fourth connecting piece; 3-Compensation mechanism; 31-Abutting part; 311-First rod; 312-Second rod; 313- 32-First connecting piece; 32-Transfer structure; 321-Second connecting piece; 3211-Rib plate; 3212-Transfer plate; 322-Third connecting piece; 323-Limiting groove; 33-Elastic element; 324-First linear guide rail; 4-First sensor; 5-Second sensor; 6-Pulley; 7-Connecting rope; 8-Counterweight; 9-Cylinder; 10-Hydraulic buffer; 101-Connecting shaft; 102-Support part; 103-Adjusting part; 104-Base; 1041-Horizontal support frame; 1042-Vertical support frame; 105-Third mounting plate; 106-Tensioning structure. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are only for illustrating relative positional relationships and do not represent actual scale.

[0020] It should be noted that specific details are set forth in the following description to facilitate understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] Gear systems generally include two main series: fixed-axis gear systems and planetary gear systems. They can achieve split-path transmission and speed change transmission, and are widely used in automotive assembly and military industries. This application will use aircraft engines as an example to provide a detailed description of gear shaft testing equipment.

[0022] Gear systems generally include two major series: fixed-axis gear systems and planetary gear systems. They can realize split-path transmission and speed change transmission, and are widely used in the automotive assembly field and the military industry.

[0023] The aircraft gearbox is a core structural component of an aero-engine, often referred to as the engine's "skeleton." It houses the gear train, and during engine operation, a major source of noise is low gear meshing precision. Specifically, during the meshing transmission between the driving and driven gears, the resulting excitations (including stiffness excitation, transmission error excitation, and meshing impact excitation) cause periodic vibrations in the gearbox, generating noise that directly impacts the engine's lifespan. Therefore, before an engine leaves the factory, the axial runout of the gear shafts housing the gear train must be inspected. Currently, the measurement of axial runout of the gear shafts inside the engine is mostly done manually through random checks, resulting in low accuracy and efficiency.

[0024] In view of this, the automatic axial movement measuring device provided in this application, by setting a clamping mechanism with a displacement sensor to drive the gear shaft to reciprocate axially, and since the clamping mechanism applies pressure to the product to be measured when moving downward, causing the outer shell of the product to bend downward, thereby affecting the measurement accuracy of the axial movement of the gear shaft, a compensation mechanism can be set to compensate for the measurement deviation of the gear shaft's axial movement caused by the bending of the outer shell, thereby effectively improving the measurement accuracy and efficiency of the gear shaft's axial movement. To make the objectives, technical solutions, and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Generally, the gear system of a product under test typically includes gear shafts, such as input and output shafts, as well as driving and driven gears. The input shaft is inserted into the inner bore of the driving gear, and the output shaft is inserted into the inner bore of the driven gear, with the driving and driven gears meshing. The aforementioned gear shaft is inserted into and fixedly connected to the inner ring of the bearing, and the gear shaft connected to the bearing is mounted in a mounting hole in the housing. Typically, along the axial direction of the gear shaft, there is a gap between the end face of the bearing and the inner end face of the mounting hole. This gap causes some movement of the gear shaft within the mounting hole. Understandably, the amount of movement of the gear shaft needs to be limited within a certain range to meet the operating requirements of the engine.

[0026] refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the automatic measurement device for cross-current provided in this application; Figure 2 For display Figure 1 A partial schematic diagram of the provided automatic axial displacement measuring device. The automatic axial displacement measuring device includes a mounting frame 1, a clamping mechanism 2, and a compensation mechanism 3. The clamping mechanism 2 is mounted on the mounting frame 1 and is used to connect the gear shaft. Along the axial direction of the clamping mechanism 2 (e.g., along the gear shaft), the device is positioned as follows: Figure 2 (In the Z-axis direction shown), the clamping mechanism 2 can reciprocate relative to the mounting frame 1 so that after the clamping mechanism 2 is connected to the gear shaft, the amount of axial movement of the gear shaft can be measured by causing the clamping mechanism 2 to drive the gear shaft to move axially.

[0027] It should be noted that this application does not limit the connection method between the clamping mechanism 2 and the gear shaft. For example, the clamping mechanism 2 can be inserted into the shaft hole of the gear shaft and tighten the shaft hole, or the clamping mechanism 2 can clamp the outer wall of the gear shaft, thereby achieving a stable connection between the clamping mechanism 2 and the gear shaft while improving the versatility of the clamping mechanism 2. In the specific configuration of the clamping mechanism 2, such as... Figure 2 and Figure 3 As shown, Figure 3 For display Figure 2A partial enlarged view of point A in the image. The clamping mechanism 2 may include a pneumatic chuck 2221 and a pneumatic gripper 2222. Specifically, the pneumatic chuck 2221 can be configured with guide posts, etc., to achieve reciprocating movement of the pneumatic chuck 2221 and the pneumatic gripper 2222 relative to the mounting bracket 1. The combined structure of the pneumatic chuck 2221 and the pneumatic gripper 2222 can be similar to a three-jaw chuck, and the chuck movement is driven by a cylinder. For example, as shown... Figure 3 As shown, the pneumatic gripper 2222 has an arc-shaped cross-section, and the outer walls of the three pneumatic grippers 2222 form a cylindrical shape. When the pneumatic gripper 2222 is stably connected to the gear shaft, the pneumatic gripper 2222 can extend into the shaft hole of the gear shaft. When the pneumatic chuck 2221 drives the three pneumatic grippers 2222 to move towards the side wall of the shaft hole, the side walls of the three pneumatic grippers 2222 press against the hole wall of the shaft hole, thereby achieving the pneumatic gripper 2222 tightening the shaft hole, that is, achieving a reliable connection between the gripper and the gear shaft.

[0028] Furthermore, since the cross-section of the pneumatic gripper 2222 is arc-shaped, and the inner sidewalls of the three pneumatic grippers 2222 form a cylindrical shape, the outer sidewall of the gear shaft can also be clamped by the inner sidewalls of the three pneumatic grippers 2222, thereby achieving a reliable connection between the gripper and the gear shaft and improving the versatility of the device. Understandably, the number of pneumatic grippers 2222 can also be two or more, as long as the outer sidewalls of the multiple pneumatic grippers 2222 can form a cylindrical shape, and the inner sidewalls can also form a cylindrical shape.

[0029] When setting up compensation agency 3, continue to refer to Figure 2 and Figure 3 The compensation mechanism 3 may include an abutment portion 31 and a transition structure 32. The abutment portion 31 is inserted into and slidably connected to the transition structure 32 along the axial direction of the clamping mechanism 2. The transition structure 32 is connected to the mounting bracket 1. When the clamping mechanism 2 drives the gear shaft to reciprocate axially, the abutment portion 31 abuts against the surface of the housing along the axial direction of the clamping mechanism 2. It is understood that the abutment portion 31 may be equipped with a power source for driving, such as an electric actuator, to achieve rapid abutment of the housing of the product to be measured at different heights. Simultaneously, the first sensor 4 of the automatic displacement measuring device is used to detect the displacement of the clamping mechanism 2, and the second sensor 5 is used to detect the displacement of the abutment portion 31.

[0030] As the clamping mechanism 2 drives the gear shaft to reciprocate axially, the clamping mechanism 2 will exert downward (in the negative direction of the Z-axis) pressure on the gear shaft. Figure 4 As shown, Figure 4This diagram illustrates a portion of the housing 03 of the product to be measured 01 under stress, where the dashed line represents the initial position of the housing 03 in a non-measuring state. The device includes a reference point for sensor measurement; exemplarily, the initial position can be set as a reference point for the sensor to measure the displacement of the component, and the reference point can be defined as point 0. During measurement, when the gear shaft 02 of the product to be measured 01 is subjected to pressure, it will cause a local downward bending of the housing 03 of the product to be measured 01. The downward displacement of the gear shaft 02 will be greater than the movable amount of the gear shaft 02 within the mounting hole 031 of the housing 03. That is, the downward displacement of the clamping mechanism 2 detected by the first sensor is greater than the actual axial movement of the gear shaft 02. Therefore, using the automatic axial movement measuring device provided in this application, a compensation mechanism 3 is provided simultaneously with the clamping mechanism 2. First, the clamping mechanism 2 is connected to the gear shaft 02, and then the abutment part 31 abuts against the housing 03 of the product to be measured 01 to protect the second sensor. Furthermore, during the process of the clamping mechanism 2 driving the gear shaft 02 to reciprocate axially, the abutment part 31 can always abut against the outer shell 03 of the product to be measured 01. During the process of the outer shell 03 bending downward or springing back due to the external force of the clamping mechanism 2, the abutment part 31 can move synchronously with the movement of the outer shell 03. At the same time, the second sensor 5 can detect the displacement of the abutment part 31 relative to the reference point. When the clamping mechanism 2 drives the gear shaft 02 to move axially to abut against the lower end face 0311 of the mounting hole 031 of the shell, the two sensors obtain corresponding values. At this time, the difference between the first sensor and the second sensor 5 is defined as the first value. Then, when the clamping mechanism 2 drives the gear shaft 02 to move axially to abut against the upper end face 0312 of the mounting hole 031 of the shell, the two sensors obtain corresponding values. At this time, the difference between the first sensor and the second sensor 5 is defined as the second value. The difference between the first value and the second value is the actual axial movement of the gear shaft 02. Compared with existing technologies, this device can automatically measure the axial movement and effectively improve the measurement accuracy and efficiency of the axial movement of the gear shaft 02.

[0031] Understandably, since the clamping mechanism 2 includes structures such as the pneumatic chuck 2221 and the pneumatic gripper 2222, it has a certain weight. Therefore, in an optional embodiment, it is also referred to... Figure 2 , Figure 5 and Figure 6 , Figure 5 For display Figure 2 A diagram from another perspective; Figure 6 For display Figure 5The enlarged view at point B in the figure shows that the automatic measuring device for cross-sectional area measurement also includes a pulley 6, a connecting rope 7, a counterweight 8, and a cylinder 9. The pulley 6 is mounted on the mounting frame 1, and the connecting rope 7 is suspended from the pulley 6 along the direction of gravity. One end of the connecting rope 7 is connected to the counterweight 8, and the other end is connected to the clamping mechanism 2. The weight of the counterweight 8 is equal to the weight of the clamping mechanism 2, so that the weight of the counterweight 8 cancels out the weight of the clamping mechanism 2. Simultaneously, the cylinder 9 is also mounted on the mounting frame 1 to drive the clamping mechanism 2 to move. Understandably, the cylinder 9 only needs to apply a small external force to achieve the movement of the clamping mechanism 2. Furthermore, since the larger the maximum force that cylinder 9 can apply, the larger the size of cylinder 9 and the larger the space it occupies, the automatic measurement device for displacement provided in this application can use a smaller size cylinder 9 to meet the external force requirements for driving the clamping mechanism 2 to move, effectively reducing the space occupied by the cylinder and improving the compactness of the device.

[0032] When specifically setting up mounting bracket 1, please refer to... Figure 2 , Figure 5 and Figure 6 Optionally, the mounting bracket 1 may include a first mounting plate 11 and a support structure 12. Specifically, the support structure 12 includes a support mounting plate 121 and a column 122. The support mounting plate 121 is exemplarily a plate structure with a mounting surface, and the pulley 6 is mounted on the mounting surface. Furthermore, along the axial direction of the clamping mechanism 2, there is a gap between the first mounting plate 11 and the mounting surface of the support structure 12, and the column 122 is disposed in this gap. The first mounting plate 11 is connected to the support mounting plate 121 through the column 122.

[0033] In the specific configuration of the clamping mechanism 2, the clamping mechanism 2 may further include a guide post 21, a clamping part 22, and a fourth connecting member 23. Specifically, along the axial direction of the clamping mechanism 2, the guide post 21 penetrates through the first mounting plate 11, and one end of the guide post 21 is connected to the clamping part 22, while the other end is located in the gap between the mounting surface of the first mounting plate 11 and the bracket structure 12, and is connected to the fourth connecting member 23. At the same time, the cylinder 9 is located between the fourth connecting member 23 and the first mounting plate 11, and the cylinder body of the cylinder 9 is mounted on the first mounting plate 11, and the cylinder push rod of the cylinder 9 is connected to the fourth connecting member 23.

[0034] It should be noted that this application does not limit the structure of the fourth connector 23. The fourth connector 23 is exemplarily a plate structure, and the plate surface of the plate structure is connected to the cylinder push rod. It is understood that the direction from the fourth connector 23 to the first mounting plate 11 is the negative direction of the Z-axis, and the cylinder push rod extends out of the cylinder body along the positive direction of the Z-axis and connects to the fourth connector 23. In addition, in order to meet the movement requirements of the clamping part 22, when the device is in a non-measuring state, there is a gap between the end of the cylinder push rod away from the fourth connector 23 and the bottom of the cavity inside the cylinder body, so as to meet the requirement that the cylinder push rod moves downward along the cylinder body and drives the clamping mechanism 2 to move downward. Specifically, since the cylinder push rod is connected to the fourth connecting member 23 and the guide post 21 is also connected to the fourth connecting member 23, and the guide sleeve for inserting the guide post 21 is installed on the first mounting plate 11 and located between the first mounting plate 11 and the fourth connecting member 23, when the cylinder push rod moves, the cylinder push rod will drive the fourth connecting member 23 and the guide post 21 to move synchronously, thereby realizing that the guide post 21 drives the clamping mechanism 2 to move.

[0035] It is worth mentioning that, such as Figure 6 As shown, the automatic measurement device for cross-flow can also include a hydraulic buffer 10. The hydraulic buffer 10 is connected to the bracket mounting plate 121 of the bracket structure 12 via a connecting plate. The buffer head of the hydraulic buffer 10 abuts against the plate surface of the fourth connecting member 23 to reduce the risk of hard impact during the movement of the cylinder 9 and improve the reliability of the movement of the cylinder 9.

[0036] In a specific embodiment of the clamping part 22, such as Figure 2 , Figure 3 and Figure 6 As shown, the clamping part 22 includes a second mounting plate 221 and a gripper structure 222. Specifically, the gripper structure 222 may include the pneumatic disc clamp 2221 and the pneumatic gripper 2222 mentioned above. The second mounting plate 221 is close to the first mounting plate 11 relative to the gripper structure 222 and is connected to one end of the guide post 21 that passes through the first mounting plate 11.

[0037] Additionally, please continue to refer to Figure 2 and Figure 3The automatic measurement device for cross-sectional area can also include a connecting shaft 101. Along the axial direction of the clamping mechanism 2, the connecting shaft 101 is disposed between the second mounting plate 221 and the gripper structure 222. The connecting shaft 101 can be, for example, a rod structure. One end of the sidewall of the rod structure has a limiting protrusion, and the other end is fixedly connected to the pneumatic disc clamp 2221 by a fastener. Furthermore, the second mounting plate 221 has a limiting groove, into which the rod structure can be embedded. Along the axial direction, the limiting protrusion of the rod structure abuts against the protrusion on the sidewall of the limiting groove to restrict the movement of the second mounting plate 221 in the positive direction of the Z-axis. For example, multiple connecting shafts 101 are arranged symmetrically along the circumference of the gripper structure 222, such as two or three, along the radial direction of the gripper structure 222.

[0038] Optionally, the automatic measurement device may further include a support portion 102 and an adjustment portion 103, wherein the adjustment portion 103 is disposed on the support portion 102 and is movable along the axial direction of the clamping mechanism 2. For example, the support portion 102 is arranged circumferentially along the gripper structure 222, and a plurality of symmetrical portions, such as two or three, are arranged radially along the gripper structure 222. Optionally, the support portion 102 may be a screw, and the adjustment portion 103 may be a nut threadedly connected to the screw. Furthermore, the support part 102 is arranged along the axial direction of the clamping mechanism 2 between the second mounting plate 221 and the gripper structure 222, and one end of the support part 102 abuts against the pneumatic disc clamp 2221, while the other end passes through the second mounting plate 221. The adjustment part 103 abuts against the side of the second mounting plate 221 opposite to the first mounting plate 11, so as to restrict the movement of the second mounting plate 221 in the negative direction of the Z-axis.

[0039] Understandably, since the cylinder 9 is connected to the gripper structure 222 via a floating joint, the connecting shaft 101 and the support portion 102 can be arranged radially at intervals along the clamping mechanism 2, and the gripper structure 222 is provided with a positioning hole on the side facing the second mounting plate 221, and one end of the support portion 102 can be used to insert into the positioning hole. During the connection process between the gripper structure 222 and the cylinder push rod of the cylinder 9, one end of the support part 102 can be inserted into the positioning hole, and the adjustment part 103 abuts against the plate surface of the second mounting plate 221 on the side near the gripper structure 222, so as to adjust the coaxiality of the gripper structure 222 and the cylinder push rod. After the coaxiality of the two is adjusted, the adjustment part 103 can be moved to separate the adjustment part 103 from the second mounting plate 221. Then, the support part 102 can be moved along the axial direction of the support part 102 to separate the support part 102 from the positioning hole, thereby realizing the quick removal of the support part 102, so as to improve the measurement accuracy of the device and the ease of assembly of the device.

[0040] When configuring the adapter structure 32, please refer to the following: Figure 2 , Figure 3 and Figure 5 Optionally, the adapter structure 32 may further include a second connector 321, a third connector 322, and a first linear guide rail 324. The first linear guide rail 324 extends along the axial direction of the clamping mechanism 2 and is slidably connected to the mounting frame 1 via the second connector 321. Specifically, a linear guide rail may be provided on the side of the first mounting plate 11 of the mounting frame 1 near the second mounting plate 221, and the linear guide rail may extend along the X-axis direction. Simultaneously, the second connector 321 is slidably connected to the linear guide rail to achieve a slidable connection between the first linear guide rail 324 and the mounting frame 1. Furthermore, the third connector 322 is slidably connected to the first linear guide rail 324, and the abutment portion 31 is inserted into the third connector 322, so that the abutment portion 31 and the second sensor 5 can adapt to the positional requirements of the gear shaft 02 of the product 01 to be measured of different specifications, improving the versatility and ease of operation of the device.

[0041] It should be noted that this application does not limit the specific shapes of the second connector 321 and the third connector 322. The second connector 321 may include a rib plate 3211 and a transition plate 3212. The rib plate 3211 is disposed on the side of the first linear guide rail 324 opposite to the third connector 322 and is fixedly connected to the first linear guide rail 324. Meanwhile, one end of the transition plate 3212 is fixedly connected to the rib plate 3211, and the other end is slidably connected to the linear guide rail on the first mounting plate 11. The third connector 322 may be a plate structure, with one end of the plate structure slidably connected to the first linear guide rail 324, and the abutment portion 31 inserted into the other end of the plate structure, so as to improve the compactness of the device while realizing the movement requirements of the abutment portion 31.

[0042] When specifically setting the abutment part 31, refer to the following: Figure 2 and Figure 3 In one optional embodiment, the abutment portion 31 may include a first rod 311, a second rod 312, and a first connecting member 313. The first rod 311 and the second rod 312 are spaced apart along the radial direction of the clamping mechanism 2, and both extend axially along the clamping mechanism 2 and are inserted into the adapter structure 32. Specifically, the first rod 311 and the second rod 312 can be inserted into the third connecting member 322 of the adapter structure 32, while the first rod 311 is connected to the second rod 312 via the first connecting member 313. Thus, during the measurement of the movement of the gear shaft 02, the first rod 311 can abut against the surface of the outer shell 03 of the product to be measured 01, and the probe of the second sensor 5 is connected to the first connecting member 313, thereby fulfilling the functional requirements of the abutment portion 31 while simplifying its structure.

[0043] It is worth mentioning that the adapter structure 32 may also include a limiting groove 323. Specifically, the limiting groove 323 can be set on the third connector 322, and along the axial direction of the clamping mechanism 2, the limiting groove 323 includes two spaced-apart sidewalls, and the first rod 311 passes through the two sidewalls. Simultaneously, the first connector 313 is connected to the first rod 311 located between the two sidewalls. Therefore, along the axial direction of the clamping mechanism 2, the position where the first connector 313 is connected to the first rod 311 can only move between the two sidewalls to prevent the first rod 311 from separating from the sidewall of the limiting groove 323. Understandably, the length of the first rod 311 is greater than the width between the two sidewalls of the limiting groove 323, and when the first connector 313 abuts against one sidewall of the limiting groove 323, the first rod 311 is still inserted into both sidewalls of the limiting groove 323, effectively improving the reliability of the device.

[0044] Additionally, a protrusion can be provided on the side wall of the third connecting member 322, through which the second rod 312 passes. Meanwhile, the compensation mechanism 3 also includes an elastic member 33, and the second sensor 5 is provided with a sensor body and the aforementioned probe. Specifically, the sensor body can be fixedly connected to the third connecting member 322 of the adapter structure 32, and the sensor body is connected to the probe via the elastic member 33, while the probe is connected to the abutment portion 31. Specifically, the probe can be connected to the first connecting member 313 of the abutment portion 31, and the elastic member 33 can be in a compressed state. Thus, during the measurement of the movement of the gear shaft 02, after the first rod 311 abuts against the outer shell 03 of the product to be measured 01, the elastic member 33 continuously applies an elastic force to the first connecting member 313. Therefore, regardless of whether the clamping mechanism 2 moves upward or downward, the elastic member 33 can ensure that the first rod 311 always abuts against the outer shell 03 of the product to be measured 01, thereby improving measurement accuracy.

[0045] It is worth mentioning that the axis of the first rod 311 and the axis of the second rod 312 can be made parallel, and the plate surface of the first connecting member 313 is perpendicular to the axis of the first rod 311. Furthermore, the side wall of the limiting groove 323 of the third connecting member 322 is provided with a through hole, and the through hole is coaxial with the first rod 311. In addition, the through hole on the protrusion of the third connecting member 322 is also coaxial with the second rod 312. In this way, during the measurement of the axial movement of the gear shaft 02, the problem of reduced measurement accuracy caused by the movement deviation of the first rod 311, the second rod 312, or the first connecting member 313 can be effectively reduced.

[0046] It should be noted that, as Figure 6 As shown, the structure of the first sensor 4 can be referenced from that of the second sensor 5, and will not be described again here. In addition, the sensor body of the first sensor 4 can be mounted on the bracket mounting plate 121 of the bracket structure 12, and the probe can abut against the fourth connector 23 to improve the compactness of the device.

[0047] In one alternative implementation, such as Figure 1 As shown, the automatic measurement device for cross-sectional area can also include a base 104 and a third mounting plate 105. Along the axial direction of the clamping mechanism 2, the mounting frame 1 is slidably connected to the third mounting plate 105. Specifically, a linear guide rail can be provided on the third mounting plate 105, extending along the axial direction of the clamping mechanism 2. A slider is provided on the mounting frame 1 to achieve the sliding connection between the two. Additionally, along the radial direction of the clamping mechanism 2, the third mounting plate 105 is slidably connected to the base 104. When specifically configuring the structure of the base 104, such as... Figure 7 As shown, Figure 7 For display Figure 1 A schematic diagram of the base 104 structure of the provided automatic measurement device is shown. The base 104 structure may include an intersecting horizontal support frame 1041 and a vertical support frame 1042. A linear guide rail is provided on the vertical support frame 1042, extending along the Y-axis. A third mounting plate 105 is connected to the vertical support frame 1042 of the base 104 via the linear guide rail, so that the third mounting plate 105 can drive the clamping mechanism 2 and the compensation mechanism 3 to move synchronously through the mounting frame 1. This is beneficial to further improve the versatility of the device for measuring different types of products 01. In addition, a linear guide rail may also be provided on the horizontal support frame 1041, and this linear guide rail can extend along the X-axis. The product 01 to be measured is placed at the mounting position and is slidably connected to the linear guide rail through a tooling, so as to facilitate the movement of the product 01 to be measured toward the clamping mechanism 2 and the compensation mechanism 3.

[0048] It should be noted that displacement sensors can be installed at the locations of linear guide rails in the automatic measurement device for cross-sectional area, and electric actuators can be used as the power source to drive the movement of the corresponding parts in order to improve the assembly efficiency and accuracy between the device and the product 01 to be measured.

[0049] It is worth mentioning that a photoelectric switch and a read / write head can also be set at the position where the product to be measured 01 is installed, so as to determine whether the product has reached the designated position and to determine the product model.

[0050] In one alternative implementation, such as Figure 1As shown, the automatic displacement measuring device also includes a tensioning structure 106. When the pneumatic gripper 2222 cannot directly extend into the shaft hole of the gear shaft 02, or directly clamp the side wall of the gear shaft 02, the tensioning structure 106 can be inserted into the shaft hole of the gear shaft 02 and the shaft hole can be tightened to achieve a stable connection with the gear shaft 02. Furthermore, the tensioning structure 106 has a coaxial column structure along the axial direction of the gear shaft 02, and the column structure has mounting holes. The pneumatic gripper 2222 can achieve a stable connection between the gripper and the gear shaft 02 by tightening the mounting holes or clamping the side wall of the column structure, thereby expanding the applicability of the device. In addition, the automatic displacement measuring device provided in this application also includes a cable chain to improve the ease of cable installation.

[0051] Having understood the structure of the automatic measurement device for cross-current measurement provided in this application, the device will be further described below in conjunction with the measurement process: First, power on the equipment, adjust the equipment to the preset mode, and use the photoelectric switch set at the installation station to determine whether the product to be measured 01 is located at the installation station; if it is in place, the clamping cylinder clamps the tooling used to install the product to be measured 01. Next, slide the tooling along the slide rail to the bottom of the clamping mechanism 2, adjust the position of the clamping mechanism 2 and the compensation mechanism 3, first connect the clamping mechanism 2 to the gear shaft 02, and then make the compensation mechanism 3 abut against the surface of the outer shell 03 of the product to be measured 01. Subsequently, the clamping mechanism 2 drives the gear shaft 02 to reciprocate along the axial direction at least once, and the first sensor 4 and the second sensor 5 respectively read the corresponding data to determine whether the amount of axial movement of the gear shaft 02 is within the acceptable range.

[0052] In summary, as the clamping mechanism 2 drives the gear shaft 02 to reciprocate axially, the clamping mechanism 2 will exert downward (negative direction along the Z-axis) pressure on the gear shaft 02, such as... Figure 4 As shown, Figure 4This is a partial schematic diagram illustrating the stress on the housing 03 of the product under test 01. When the gear shaft 02 of the product under test 01 is subjected to pressure, it will cause a partial downward bending of the housing 03 of the product under test 01. The downward displacement of the gear shaft 02 will be greater than the movable amount of the gear shaft 02 within the mounting hole 031 of the housing 03. That is, the downward displacement of the clamping mechanism 2 detected by the first sensor 4 is greater than the actual axial movement of the gear shaft 02. Therefore, using the automatic measurement device for cross-sectional area provided in this application, a compensation mechanism 3 is set up simultaneously with the clamping mechanism 2. First, the clamping mechanism 2 is connected to the gear shaft 02, and then the abutment part 31 abuts against the outer shell 03 of the product to be measured 01. During the axial reciprocating movement of the gear shaft 02 driven by the clamping mechanism 2, the abutment part 31 remains in contact with the outer shell 03 of the product to be measured 01. When the outer shell 03 bends or springs back due to the external force of the clamping mechanism 2, the abutment part 31 moves synchronously with the movement of the outer shell 03. Simultaneously, the second sensor 5 can detect the abutment part 31. The displacement is measured when the clamping mechanism 2 drives the gear shaft 02 axially to abut against the lower end face 0311 of the mounting hole 031 of the housing. At this point, the difference between the first sensor 4 and the second sensor 5 is defined as the first value. Then, when the clamping mechanism 2 drives the gear shaft 02 axially to abut against the upper end face 0312 of the mounting hole 031 of the housing, the two sensors acquire corresponding values. The difference between the first sensor and the second sensor 5 is defined as the second value. The difference between the first value and the second value is the actual axial movement of the gear shaft 02. Compared to existing technologies, this device can automatically measure the axial movement and effectively improve the measurement accuracy and efficiency of the gear shaft 02's axial movement.

[0053] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An automatic measurement device for cross-flow measurement, wherein the product to be measured includes a gear shaft and a housing, the gear shaft being mounted on the housing; characterized in that, The automatic measurement device for crosstalk includes a mounting frame, a clamping mechanism, a compensation mechanism, a first sensor, and a second sensor. The clamping mechanism is mounted on the mounting frame, wherein: The clamping mechanism is used to connect the gear shaft, and along the axial direction of the clamping mechanism, the clamping mechanism can reciprocate relative to the mounting bracket; The compensation mechanism includes an abutment part and a transition structure. Along the axial direction of the clamping mechanism, the abutment part is inserted into the transition structure and is slidably connected to the transition structure; the transition structure is connected to the mounting bracket. When the clamping mechanism is used to drive the gear shaft to reciprocate, the abutting part abuts against the surface of the housing along the axial direction of the clamping mechanism; The first sensor is used to detect the displacement of the clamping mechanism, and the second sensor is used to detect the displacement of the abutment portion.

2. The automatic measurement device for cross-current measurement according to claim 1, characterized in that, The abutting part includes a first rod, a second rod, and a first connecting member. The first rod and the second rod are spaced apart along the radial direction of the clamping mechanism and extend along the axial direction of the clamping mechanism and are inserted into the adapter structure. The first rod is connected to the second rod via the first connector, and the first rod is used to abut against the surface of the housing; The probe of the second sensor is used to connect to the first connector.

3. The automatic measurement device for cross-current measurement according to claim 2, characterized in that, The adapter structure includes a limiting groove along the axial direction of the clamping mechanism. The limiting groove includes two spaced-apart sidewalls, and the first rod passes through the two sidewalls. The first connector is connected to the first rod located between the two sidewalls.

4. The automatic measurement device for cross-current measurement according to claim 1, characterized in that, The compensation mechanism further includes an elastic element, and the second sensor includes a sensor body and a probe. The sensor body is disposed on the adapter structure and is connected to the probe through the elastic element. The probe is used to connect to the abutment portion.

5. The automatic measurement device for cross-current measurement according to claim 1, characterized in that, The adapter structure further includes a second connector, a third connector, and a first linear guide rail. The first linear guide rail extends along the axial direction of the clamping mechanism and is slidably connected to the mounting bracket via the second connector. The third connector is slidably connected to the first linear guide rail, and the abutting part is inserted into the third connector.

6. The automatic measurement device for cross-contamination according to any one of claims 1-5, characterized in that, The automatic measurement device for cross-sectional area also includes a pulley, a connecting rope, a counterweight, and a cylinder. The pulley is mounted on the mounting frame, and the connecting rope is hung on the pulley. Along the direction of gravity, one end of the connecting rope is connected to the counterweight, and the other end is connected to the clamping mechanism. The weight of the counterweight is equal to the weight of the clamping mechanism. The cylinder is mounted on the mounting bracket and is used to drive the clamping mechanism to move.

7. The automatic measurement device for cross-contamination according to claim 6, characterized in that, The mounting frame includes a first mounting plate and a support structure. Along the axial direction of the clamping mechanism, there is a gap between the mounting surface of the first mounting plate and the mounting surface of the support structure, and the pulley is disposed on the mounting surface. The clamping mechanism includes a guide post, a clamping part, and a fourth connecting member. Along the axial direction of the clamping mechanism, the guide post passes through the first mounting plate, with one end connected to the clamping part and the other end located in the gap and connected to the fourth connecting member. The cylinder is located between the fourth connector and the first mounting plate, wherein the cylinder body is mounted on the first mounting plate, and the cylinder push rod is connected to the fourth connector.

8. The automatic measurement device for cross-contamination according to claim 7, characterized in that, The clamping part includes a second mounting plate and a gripper structure. Along the axial direction of the clamping mechanism, the second mounting plate is close to the first mounting plate relative to the gripper structure and is connected to one end of the guide post. The automatic measurement device for cross-flow also includes a support part, an adjustment part, and a connecting shaft. The adjustment part is disposed on the support part and moves along the axial direction of the clamping mechanism. Along the axial direction of the clamping mechanism, the gripper structure is provided with a positioning hole on the side facing the second mounting plate. At least a portion of the connecting shaft and at least a portion of the support are located between the second mounting plate and the gripper structure. One end of the connecting shaft is connected to the gripper structure, and the other end is engaged with the second mounting plate. One end of the support is used to be inserted into the positioning hole, and the other end is used to pass through the second mounting plate. The adjusting part is used to abut against the plate surface of the second mounting plate on the side close to the gripper structure.

9. The automatic measurement device for cross-contamination according to claim 6, characterized in that, The automatic measurement device for cross-flow also includes a base and a third mounting plate, and the mounting frame is slidably connected to the third mounting plate along the axial direction of the clamping mechanism; The third mounting plate is slidably connected to the base along the radial direction of the clamping mechanism.

10. The automatic measurement device for cross-contamination according to claim 6, characterized in that, The clamping mechanism is used to insert into the shaft hole of the gear shaft and tighten the shaft hole of the gear shaft, or to clamp the outer wall of the gear shaft.

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