Screw rod detection device

Abstract

The utility model discloses a lead screw detection device, which comprises a table top, a first detection mechanism and a second detection mechanism, and is characterized in that the first detection mechanism and the second detection mechanism are both located on the table top, and the first detection mechanism and the second detection mechanism are located on the same straight line; the first detection mechanism comprises a first power assembly, a first lead screw assembly, a first sliding table assembly, a pull pressure sensor and a first chuck, one end of the first lead screw assembly is connected with the first power assembly, and the other end of the first lead screw assembly is located on the first sliding table assembly; the end, close to the first sliding table assembly, of the first lead screw assembly is connected with the tension and pressure sensor, and the first chuck is connected with the tension and pressure sensor, so that the first lead screw assembly can drive the first chuck and the tension and pressure sensor to conduct axial displacement. The axial direction of the first chuck and the axial direction of the second chuck are located on the same straight line. The lead screw detection device has the effects of optimizing the data accuracy and stability of lead screw detection and improving the efficiency of lead screw detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of precision measurement technology, and particularly to a lead screw detection device. BACKGROUND

[0002] The prior art lead screw detection device respectively measures the tension, transmission efficiency of the to-be-tested lead screw assembly through two completely different devices, which needs to install and dismount the to-be-tested lead screw assembly on the lead screw detection device for multiple times, so that the to-be-tested lead screw assembly needs to be touched by the operator for multiple times in the detection process, so that the detection data is interfered by the operator, and then the detection data of the to-be-tested lead screw assembly is affected, and the detection efficiency of the to-be-tested lead screw assembly is also low in the process of continuous installation and dismounting, so there is room for improvement. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a lead screw detection device, which can make the operator only need to install the to-be-tested lead screw assembly once to measure the tension data, pressure data and transmission efficiency of the to-be-tested lead screw, reduce the external interference of the to-be-tested lead screw assembly during detection, and speed up the detection rate of the to-be-tested lead screw assembly, and at the same time, the first detection mechanism and the second detection mechanism of the lead screw detection device are located on the same linear rail plane, so that the parts of the first detection mechanism and the second detection mechanism are directly connected, the complex transmission structure is reduced, and the detection data is more accurate and stable.

[0004] In summary, in order to optimize the data accuracy and stability of the lead screw detection and improve the efficiency of the lead screw detection, the present application provides a lead screw detection device.

[0005] The lead screw detection device provided by the present application adopts the following technical scheme:

[0006] A kind of screw rod detection device, including mesa, first detection mechanism and second detection mechanism, the first detection mechanism and the second detection mechanism are located on the mesa, and the first detection mechanism and the second detection mechanism are located on the same straight line;The first detection mechanism includes first power component, first screw rod component, first sliding table component, tension and compression force sensor and first chuck, one end of the first screw rod component is connected with the first power component, the other end is located on the first sliding table component, the first screw rod component is connected with the tension and compression force sensor in the end close to the first sliding table component, the first chuck is connected with the tension and compression force sensor, so that first screw rod component can drive first chuck and tension and compression force sensor carry out axial displacement;The second detection mechanism includes upper detection mechanism and lower detection mechanism, the lower detection mechanism includes second sliding table component, second screw rod component and second power component, the second sliding table component is arranged on the mesa, one end of the second screw rod component is connected with the second sliding table component, the other end is connected with the second power component, the upper detection mechanism is located on the second sliding table component, so that lower detection mechanism can drive upper detection mechanism carry out axial displacement, the upper detection mechanism includes third power component, torque sensor, main shaft and second chuck, the third power component is connected with one end of the torque sensor, the other end of the torque sensor is connected with one end of the main shaft, the other end of the main shaft is connected with the second chuck;The axial direction of the first chuck and the axial direction of the second chuck are located on the same straight line.

[0007] By adopting the technical scheme, the operator connects one end of the to-be-tested lead screw of the to-be-tested lead screw assembly with the first chuck and connects the to-be-tested nut end of the to-be-tested lead screw assembly with the second chuck. When the operator needs to measure the transmission efficiency, the first detection mechanism is position-limited, the upper detection mechanism and the lower detection mechanism of the second detection mechanism start to move, the upper detection mechanism drives the torque sensor, the main shaft and the second chuck to start to rotate under the driving of the third power assembly, and then the to-be-tested nut of the to-be-tested lead screw assembly connected with the second chuck is displaced on the to-be-tested lead screw. The lower detection mechanism drives the upper detection mechanism to axially displace under the driving of the second power assembly, and then the tension and pressure sensor records the tension and pressure values in the whole process, and the torque sensor records the torque values in the whole process. Then, the operator can input the torque values and the tension and pressure values into the formula for calculating the transmission efficiency, so as to obtain the transmission efficiency of the to-be-tested lead screw assembly. The existing upper instrument can also be set, and the transmission efficiency can be automatically calculated by transmitting the tension and pressure values and the torque values to the upper instrument. When the operator needs to measure the tension and pressure data, the tension and pressure data can be measured in at least three ways. The first way is that the operator connects the to-be-tested lead screw end of the to-be-tested lead screw assembly with the first chuck and connects the to-be-tested nut end of the to-be-tested lead screw assembly with the second chuck, limits the position of the first detection mechanism, and makes the upper detection mechanism of the second detection mechanism also stop running. The lower detection mechanism of the second detection mechanism moves under the action of the second power assembly, and then the second chuck of the upper detection mechanism gives the to-be-tested nut an axial tension or pressure. The tension and pressure sensor records the tension and pressure data in this process. The second way is that the operator connects one end of the to-be-tested lead screw of the to-be-tested lead screw assembly with the first chuck and connects the to-be-tested nut end of the to-be-tested lead screw assembly with the second chuck. The operator limits the positions of the upper detection mechanism and the lower detection mechanism of the second detection mechanism, and drives the first lead screw assembly to axially move through the first power assembly of the first detection mechanism, so as to realize that the first chuck gives the to-be-tested lead screw an axial tension or pressure. The tension and pressure sensor records the tension and pressure data in this process. The third way is that the operator connects one end of the to-be-tested lead screw of the to-be-tested lead screw assembly with the first chuck and connects the to-be-tested nut end of the to-be-tested lead screw assembly with the second chuck. The operator stops the upper detection mechanism of the second detection mechanism from running, so that the first detection mechanism gives the to-be-tested lead screw an axial tension or pressure, and the lower detection mechanism of the second detection mechanism can also give the to-be-tested nut an axial tension or pressure. The tension and pressure sensor records the tension and pressure data in this process. The operator can determine the destructive tension and pressure value of the to-be-tested lead screw assembly by the peak value of the tension and pressure data, record the destructive tension and pressure value of the to-be-tested lead screw assembly by the sliding point of the tension and pressure data, and detect whether the lead screw assembly is qualified by comparing the tension and pressure data of the lead screw assembly with the theoretical tension and pressure data of the lead screw assembly.

[0008] Preferably, the first screw rod assembly comprises a first screw rod and a first nut, the first sliding table assembly comprises a first linear rail seat, a first sliding block and a nut seat, one end of the first screw rod is connected with the first power assembly, the other end of the first screw rod is connected with the first nut, the first nut is connected with one end of the nut seat, the other end of the nut seat is connected with one end of the tension and compression force sensor, the other end of the tension and compression force sensor is connected with the first chuck, the nut seat is further connected with the first sliding block, and the first sliding block is matched with the first linear rail seat.

[0009] By adopting the technical scheme, the first screw rod rotates under the action of the first power assembly, the first nut on the first screw rod is axially displaced on the first screw rod, the tension and compression force sensor and the first chuck are axially displaced along with the axial displacement of the first nut, and meanwhile, the lower side of the first nut is connected with the nut seat of the first sliding table assembly, the nut seat is connected with the first sliding block and the first linear rail seat, so that when the first nut is axially displaced, the lower side of the first nut slides along the first linear rail seat through the nut seat and the first sliding block, thereby enabling the first sliding table assembly to provide support force for the displacement process of the first nut.

[0010] Preferably, the second power assembly comprises a second motor and a second speed reducer, the second sliding table assembly comprises a second linear rail seat, a second sliding block and a large sliding table, the second screw rod assembly comprises a second screw rod and a second nut, the two second linear rail seats are symmetrically arranged on the table top, the second sliding block is matched with the second linear rail seat, the large sliding table is arranged on the second sliding block, the large sliding table is connected with the second nut, the second nut is connected with the second screw rod, one end of the second screw rod is located between the two second linear rail seats, the other end of the second screw rod is connected with the second speed reducer, the other end of the second speed reducer is connected with the second motor, and the upper detection mechanism is located on the large sliding table.

[0011] By adopting the technical scheme, the second motor is powered to rotate, the second speed reducer transmits the rotation to the second screw rod, thereby enabling the second nut on the second screw rod to be axially displaced on the second screw rod, thereby driving the large sliding table on the second nut to be axially displaced, and meanwhile, the large sliding table slides along the second linear rail seat through the second sliding block, so that the second sliding block and the second linear rail seat provide support force for the large sliding table during the displacement process.

[0012] Preferably, the first chuck is provided with a chuck sliding block matched with the second linear rail seat.

[0013] By adopting the technical scheme, the chuck sliding block and the second linear rail seat can provide stable support force for the first chuck, ensure the stability of the position height of the first chuck, and on the other hand, the axial position of the first chuck can be conveniently changed through the sliding of the chuck sliding block and the second linear rail seat.

[0014] Preferably, the third power assembly comprises a third motor and a third speed reducer, the third motor is connected with the third speed reducer, the third speed reducer is connected with the torque sensor, the torque sensor is connected with the main shaft, and the main shaft is connected with the second chuck.

[0015] By adopting the above technical scheme, the third motor rotates, the third speed reducer drives the torque sensor to rotate, the torque sensor records the rotating torque and drives the main shaft to rotate, the main shaft drives the second chuck to rotate, so that the second chuck can rotate, and the nut connected with the second chuck can rotate on the test screw rod to move axially, so that the test screw rod assembly can obtain torque and tension and compression force values at the same time, so that the operator only needs to install the test screw rod assembly once to measure the tension and compression force data and transmission efficiency of the test screw rod, reduces the external interference of the test screw rod assembly during detection, and speeds up the detection rate of the test screw rod assembly.

[0016] Preferably, the first power assembly comprises a first motor, a first speed reducer, a power wheel, a synchronous wheel and a belt, the first speed reducer is connected with the first motor, the power wheel is connected with the first speed reducer, the synchronous wheel is connected with the first screw rod assembly, and the belt is located on the power wheel and the synchronous wheel; The first screw rod assembly is also provided with a magnetic powder brake, and the magnetic powder brake is electrically connected with the first power assembly.

[0017] By adopting the above technical scheme, the first motor rotates, the first speed reducer drives the power wheel to rotate, the power wheel drives the belt to rotate, the belt drives the synchronous wheel to rotate, the synchronous wheel is connected with the first screw rod to rotate synchronously, and the first nut on the first screw rod moves axially on the first screw rod. At the same time, the magnetic powder brake is a load, so that the first power assembly starts when the first detection mechanism is in motion, and the magnetic powder brake is in an open state at this time. When the first detection mechanism is in standby state, the first power assembly is static, and the magnetic powder brake is in working state at this time, so that the magnetic powder brake is used to lock the first detection mechanism.

[0018] Preferably, a third detection mechanism is further included, which is located on the table top, and comprises a third sliding table assembly, a third chuck, a fourth chuck, a main shaft and a fourth motor, the third sliding table assembly comprises a third linear rail base, a third sliding block and a sliding table, the third linear rail base is symmetrically arranged on the table top, the third sliding block is matched with the third linear rail base, and the sliding table is connected with the third sliding block, the fourth motor is located on the sliding table, one end of the fourth motor is connected with the main shaft, the other end of the main shaft is connected with the fourth chuck, the third chuck is arranged on the table top, and the third chuck is arranged relative to the fourth chuck, the axial direction of the third chuck is located on the same straight line with the axial direction of the fourth chuck, and the table top is provided with a distance measuring instrument at the third chuck or the fourth chuck.

[0019] By adopting the technical scheme, the to-be-tested screw rod end of the to-be-tested screw rod assembly is arranged on the third chuck, the to-be-tested nut end is arranged on the fourth chuck, the fourth motor rotates and transmits the rotation to the main shaft, the main shaft transmits the rotation to the fourth chuck, the fourth chuck drives the to-be-tested nut to rotate on the to-be-tested screw rod, so that the to-be-tested nut axially moves on the to-be-tested screw rod, and the sliding table axially moves on the third linear rail base through the third sliding block, the distance measuring instrument measures the distance between the third chuck and the sliding table / third sliding block, so as to measure the linear running speed of the to-be-tested screw rod assembly, and relevant speed data can be obtained; and the to-be-tested screw rod end of the to-be-tested screw rod assembly can also be arranged on the fourth chuck, and the to-be-tested nut end is arranged on the third chuck.

[0020] Preferably, the table top is provided with an anti-collision block on the sliding path of the sliding table.

[0021] By adopting the technical scheme, the anti-collision block can not only limit the displacement range of the sliding table, but also can rapidly brake the speed curve of the to-be-tested screw rod assembly, so that the starting point and the ending point of the speed curve can be conveniently and clearly understood by the worker.

[0022] Preferably, a control screen is further included, which is located on the table top, and is electrically connected with the first detection mechanism, the second detection mechanism and the third detection mechanism.

[0023] By adopting the technical scheme, the control screen can control the running of the first detection mechanism, the second detection mechanism and the third detection mechanism, and the data of the first detection mechanism, the second detection mechanism and the third detection mechanism can also be processed by the built-in software of the control screen, so that the manual participation is reduced, and the generation of the detection result is convenient.

[0024] Preferably, the table top is provided with a supporting leg.

[0025] By adopting the technical scheme, the height of the table top can be set by setting the height of the supporting legs, and the height of the table top can be freely adjusted to a height convenient for production.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The operator connects one end of the to-be-tested lead screw of the to-be-tested lead screw assembly with the first chuck, and connects the to-be-tested nut end of the to-be-tested lead screw assembly with the second chuck. When the operator needs to measure the transmission efficiency, the first detection mechanism is position-limited, and the upper detection mechanism and the lower detection mechanism of the second detection mechanism both start to move. The upper detection mechanism drives the torque sensor, the main shaft and the second chuck to start to rotate under the driving of the third power assembly, so as to make the to-be-tested nut of the to-be-tested lead screw assembly connected with the second chuck displace on the to-be-tested lead screw. The lower detection mechanism drives the upper detection mechanism to axially displace under the driving of the second power assembly, so as to make the tension and pressure sensor record the tension and pressure values in the whole process, and make the torque sensor record the torque values in the whole process. Then, the operator can input the torque values and the tension and pressure values into a formula for calculating the transmission efficiency, so as to obtain the transmission efficiency of the to-be-tested lead screw assembly. The existing upper instrument can also be set, and the tension and pressure values and the torque values are transmitted to the upper instrument, so as to automatically calculate the transmission efficiency.

[0028] 2. The operator connects the test lead screw of the test lead screw assembly to the first chuck and connects the test nut of the test lead screw assembly to the second chuck. When the operator needs to measure the tension and compression force data, there are at least three ways to measure. The first way: the operator connects the test lead screw of the test lead screw assembly to the first chuck and connects the test nut of the test lead screw assembly to the second chuck, limits the position of the first detection mechanism, and makes the upper detection mechanism of the second detection mechanism also stop running. The lower detection mechanism of the second detection mechanism moves under the action of the second power assembly, thereby driving the second chuck of the upper detection mechanism to give the test nut an axial tension or compression force. During this process, the tension and compression force sensor records the tension and compression force data. The second way: the operator connects the test lead screw of the test lead screw assembly to the first chuck and connects the test nut of the test lead screw assembly to the second chuck. The operator limits the position of the upper detection mechanism and the lower detection mechanism of the second detection mechanism, and drives the first lead screw assembly to move axially through the first power assembly of the first detection mechanism, thereby realizing that the first chuck gives the test lead screw an axial tension or compression force. During this process, the tension and compression force sensor records the tension and compression force data. The third way: the operator connects the test lead screw of the test lead screw assembly to the first chuck and connects the test nut of the test lead screw assembly to the second chuck, and stops the upper detection mechanism of the second detection mechanism from running. The first detection mechanism gives the test lead screw an axial tension or compression force, and the lower detection mechanism of the second detection mechanism can also give the test nut an axial tension or compression force. During this process, the tension and compression force sensor records the tension and compression force data. The operator can determine the destructive compression and tension value of the test lead screw assembly by the peak value of the tension and compression force data, record the destructive compression and tension value of the test lead screw assembly by the sliding point position of the tension and compression force data, and also compare the tension and compression force data of the lead screw assembly with the theoretical tension and compression force data of the lead screw assembly to detect whether the lead screw assembly is qualified.

[0029] 3. The test lead screw end of the test lead screw assembly is installed on the third chuck, and the test nut end is installed on the fourth chuck. The fourth motor rotates and transmits the rotation to the main shaft, and the main shaft transmits the rotation to the fourth chuck. The fourth chuck drives the test nut to rotate on the test lead screw, thereby making the test nut axially displace on the test lead screw, and the sliding table axially displaces on the third linear rail seat through the third sliding block. The distance measuring instrument measures the distance between the third chuck and the sliding table / third sliding block to measure the linear running speed of the test lead screw assembly, thereby obtaining relevant speed data. The test lead screw end of the test lead screw assembly can also be installed on the fourth chuck, and the test nut end is installed on the third chuck. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 It is a structural schematic view of the first detection mechanism and the second detection mechanism in the embodiment.

[0031] Fig. 2 is a structural schematic view of the first detection mechanism in the embodiment;

[0032] Fig. 3 is a structural schematic view of the partial lower detection mechanism in the embodiment;

[0033] Fig. 4 is a structural schematic view of the second detection mechanism in the embodiment;

[0034] Fig. 5 is a structural schematic view of the third detection mechanism in the embodiment;

[0035] Fig. 6 is a structural schematic view of the lead screw detection device in the embodiment.

[0036] The reference signs: 1, table top; 2, first detection mechanism; 3, second detection mechanism; 4, first power assembly; 5, first lead screw assembly; 6, first sliding table assembly; 7, tension and pressure sensor; 8, first chuck; 9, upper detection mechanism; 10, lower detection mechanism; 11, second sliding table assembly; 12, second lead screw assembly; 13, second power assembly; 14, third power assembly; 15, torque sensor; 16, main shaft; 17, second chuck; 18, first lead screw; 19, first nut; 20, first linear rail seat; 21, first sliding block; 22, nut seat; 23, second motor; 24, second speed reducer; 25, second linear rail seat; 26, second sliding block; 27, large sliding table; 28, second lead screw; 29, second nut; 30, chuck sliding block; 31, third motor; 32, third speed reducer; 33, first motor; 34, first speed reducer; 35, power wheel; 36, synchronous wheel; 37, belt; 38, magnetic powder brake; 39, third detection mechanism; 40, third sliding table assembly; 41, third chuck; 42, fourth chuck; 43, baffle; 44, fourth motor; 45, third linear rail seat; 46, third sliding block; 47, sliding table; 48, anti-collision block; 49, chuck sliding plate; 50, supporting leg; 51, sliding table seat; 52, cylindrical part; 53, extension part; 54, mounting plate; 55, shaft coupling; 56, bearing seat; 57, chuck seat. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying Figs. 1-6 The application is further described in detail.

[0038] The embodiment of the application discloses a lead screw detection device.

[0039] Reference Figs. 1-4 , including a table top 1, a first detection mechanism 2 and a second detection mechanism 3, the first detection mechanism 2 and the second detection mechanism 3 are both located on the table top 1, and the first detection mechanism 2 and the second detection mechanism 3 are located on the same straight line.

[0040] The first detection mechanism 2 comprises a first power assembly 4, a first lead screw assembly 5, a first sliding table assembly 6, a tension and pressure sensor 7 and a first chuck 8. The first lead screw assembly 5 comprises a first lead screw 18 and a first nut 19. The first sliding table assembly 6 comprises a first linear rail seat 20, a first sliding block 21 and a nut seat 22. The left part of the table top 1 is bolted with a sliding table seat 51. The first linear rail seat 20 is symmetrically arranged on the upper side of the sliding table seat 51 and is bolted with the sliding table seat 51. The first sliding block 21 is matched with the first linear rail seat 20 so that the first sliding block 21 is slidingly connected with the first linear rail seat 20. The nut seat 22 is located on the upper side of the two first sliding blocks 21. The nut seat 22 comprises a cylindrical part 52 and an extension part 53. The two extension parts 53 are symmetrically located on the side wall of the cylindrical part 52 and are integrally formed with the cylindrical part 52. The two extension parts 53 are respectively located on the upper side of the two first sliding blocks 21 and are bolted with the first sliding blocks 21. The cylindrical part 52 is stably located above the position between the two sliding blocks. The left end of the cylindrical part 52 of the nut seat 22 is inserted with the first nut 19, which is threadedly connected with the first lead screw 18. One end of the first lead screw 18 is rotatably connected with a mounting plate 54, which is bolted with the sliding table seat 51. The other end of the first lead screw 18 is also rotatably connected with the mounting plate 54, which is bolted with the table top 1, so that the first lead screw 18 can rotate on the two mounting plates 54. The first lead screw 18 is connected with the first power assembly 4, so that the first power assembly 4 can drive the first lead screw 18 to rotate, thereby driving the first nut 19 and the nut seat 22 on the first lead screw 18 to move axially on the first lead screw 18. At the same time, the first sliding block 21 below the nut seat 22 slides on the first linear rail seat 20 to provide support for the axial movement of the nut seat 22. The right end of the nut seat 22 is inserted with the tension and pressure sensor 7, and the right end of the tension and pressure sensor 7 is inserted with the first chuck 8, which is used to be fixedly connected with the lead screw end of the lead screw to be measured. The tension and pressure sensor 7 detects and records the axial tension, pressure and other data.

[0041] The second detection mechanism 3 comprises an upper detection mechanism 9 and a lower detection mechanism 10, the lower detection mechanism 10 comprises a second sliding table assembly 11, a second screw rod assembly 12 and a second power assembly 13, the second power assembly 13 comprises a second motor 23 and a second speed reducer 24, the second sliding table assembly 11 comprises a second linear rail seat 25, a second sliding block 26 and a large sliding table 27, the second screw rod assembly 12 comprises a second screw rod 28 and a second nut 29, the second linear rail seat 25 is symmetrically arranged at the right part of the table top 1, the second linear rail seat 25 is bolted with the table top 1, the second sliding block 26 is matched with the second linear rail seat 25, so that the second sliding block 26 is in sliding connection with the second linear rail seat 25, the large sliding table 27 is bolted on the upper side of the two second sliding blocks 26, the second screw rod 28 is located between the two second linear rail seats 25, both ends of the second screw rod 28 are rotatably connected with mounting plates 54, the mounting plates 54 are bolted with the table top 1, the second nut 29 is threadedly connected on the second screw rod 28, the upper side of the second nut 29 is bolted with the lower side of the large sliding table 27, so that when the second screw rod 28 rotates on the two mounting plates 54, the second nut 29 moves axially on the second screw rod 28, and then the second nut 29 drives the large sliding table 27 to also move axially, the second sliding block 26 at the lower side of the large sliding table 27 slides on the second linear rail seat 25 to provide radial support for the axial movement of the large sliding table 27, the right end of the second screw rod 28 is inserted with a shaft coupling 55, the shaft coupling 55 is inserted with one end of the second speed reducer 24 at the end away from the second screw rod 28, the other end of the second speed reducer 24 is inserted with the second motor 23, so that the second motor 23 can drive the second screw rod 28 to rotate through the second speed reducer 24, and then drive the large sliding table 27 to move axially on the second linear rail seat 25.

[0042] The upper detection mechanism 9 comprises a third power assembly 14, a torque sensor 15, a main shaft 16 and a second chuck 17. The third power assembly 14 comprises a third motor 31 and a third speed reducer 32. The upper side of the large slide 27 is bolted with a bearing seat 56. The bearing seat 56 is axially inserted with the main shaft 16. The left end of the main shaft 16 is provided with a counterbore. The counterbore can be used to accommodate a certain length of the measured screw rod of the measured screw rod assembly. The right end of the main shaft 16 is provided with a round protrusion. The left end of the main shaft 16 is bolted with the second chuck 17. The second chuck 17 can be matched with the measured nut of the measured screw rod assembly. The axial direction of the second chuck 17 is parallel to the horizontal plane. The axial direction of the first chuck 8 and the axial direction of the second chuck 17 are located on the same straight line. The right end of the main shaft 16 is inserted with a shaft coupling 55 through the round protrusion. The other end of the shaft coupling 55 is inserted with the torque sensor 15. The lower side of the torque sensor 15 is bolted with a torque seat. The lower side of the torque seat is bolted on the large slide 27. The right end of the torque sensor 15 is also inserted with the third speed reducer 32 through the shaft coupling 55. The third speed reducer 32 is rotatably connected with a mounting plate 54. The mounting plate 54 is bolted on the large slide 27. The right end of the third speed reducer 32 is inserted with the third motor 31. The third motor 31 rotates. The third speed reducer 32 transmits the rotation of the third motor 31 to the torque sensor 15. The torque sensor 15 records the rotation torque on one hand and transmits the rotation to the main shaft 16 on the other hand. The main shaft 16 transmits the rotation to the second chuck 17. The second chuck 17 can rotate. The measured nut connected with the second chuck 17 can rotate on the measured screw rod to perform axial displacement. The counterbore in the main shaft 16 can accommodate part of the measured screw rod.

[0043] The operator connects the to-be-tested lead screw of the to-be-tested lead screw assembly with the first chuck 8, and connects the to-be-tested nut of the to-be-tested lead screw assembly with the second chuck 17. When the operator needs to measure the transmission efficiency, the position of the first detection mechanism 2 is defined by stopping the first motor 33 and locking the first sliding block 21, and the upper detection mechanism 9 and the lower detection mechanism 10 of the second detection mechanism 3 start to move. The upper detection mechanism 9 is driven by the third power assembly 14 to drive the torque sensor 15, the main shaft 16 and the second chuck 17 to start to rotate, so as to make the to-be-tested nut connected with the second chuck 17 displace on the to-be-tested lead screw. The lower detection mechanism 10 is driven by the second power assembly 13 to make the second lead screw assembly 12 drive the upper detection mechanism 9 to displace axially, so as to make the tension and pressure sensor 7 record the tension and pressure values in the whole process, and make the torque sensor 15 record the torque values in the whole process. Then, the operator can input the torque values and the tension and pressure values into the formula for calculating the transmission efficiency, so as to obtain the transmission efficiency of the to-be-tested lead screw assembly. The tension and pressure values can also be transmitted to the upper instrument in the prior art, and then the transmission efficiency is automatically calculated. When the operator needs to measure the tension and pressure data, at least three ways can be used to measure. The first way is that the operator connects the to-be-tested lead screw of the to-be-tested lead screw assembly with the first chuck 8, and connects the to-be-tested nut of the to-be-tested lead screw assembly with the second chuck 17. The position of the first detection mechanism 2 is defined by stopping the first motor 33 and locking the first sliding block 21. The position of the upper detection mechanism 9 of the second detection mechanism 3 is defined by stopping the third motor 31 and the third speed reducer 32, so that only the lower detection mechanism 10 of the second detection mechanism 3 moves under the action of the second power assembly 13, thereby driving the second chuck 17 of the upper detection mechanism 9 to give the to-be-tested nut an axial tension or pressure. The tension and pressure sensor 7 records the tension and pressure data in this process. The second way is that the operator connects the to-be-tested lead screw of the to-be-tested lead screw assembly with the first chuck 8, and connects the to-be-tested nut of the to-be-tested lead screw assembly with the second chuck 17. The operator defines the positions of the upper detection mechanism 9 and the lower detection mechanism 10 of the second detection mechanism 3, and drives the first lead screw assembly 5 to move axially by the first power assembly 4 of the first detection mechanism 2, so as to realize that the first chuck 8 gives the to-be-tested lead screw an axial tension or pressure. The tension and pressure sensor 7 records the tension and pressure data in this process. The third way is that the operator connects the to-be-tested lead screw of the to-be-tested lead screw assembly with the first chuck 8, and connects the to-be-tested nut of the to-be-tested lead screw assembly with the second chuck 17. The upper detection mechanism 9 of the second detection mechanism 3 is in a stopped running state, so that the first detection mechanism 2 gives the to-be-tested lead screw an axial tension or pressure, and the lower detection mechanism 10 of the second detection mechanism 3 can also give the to-be-tested nut an axial tension or pressure. The tension and pressure sensor 7 records the tension and pressure data in this process.The operator can determine the destructive compression and tension values of the tested ball screw assembly by pulling the peak value of the compression and tension data, record the destructive compression and tension values of the tested ball screw assembly by pulling the sliding point of the compression and tension data, and detect whether the ball screw assembly is qualified by comparing the compression and tension data of the ball screw assembly with the theoretical compression and tension data of the ball screw assembly.

[0044] Further, in the embodiment, the first detection mechanism 2 and the second detection mechanism 3 are located on the same straight line, so that the measurement structures are located on the same rail plane, and the measurement parts are directly connected, reducing the transmission loss of the measurement device and making the measurement results more accurate.

[0045] Further, in the embodiment, the tension and compression sensor and the first chuck 8 can be further provided with a chuck seat 57, the left end of the chuck seat 57 is inserted with the tension and compression sensor, the right end of the chuck seat 57 is inserted with the first chuck 8, the chuck seat 57 is bolted with a chuck sliding plate 49 below, the chuck sliding plate 49 is symmetrically bolted with a chuck sliding block 30 on the lower side, the chuck sliding block 30 cooperates with the second rail seat 25, the chuck sliding block 30 is slidingly connected with the second rail seat 25, the chuck sliding block 30 and the second rail seat 25 can provide stable support force for the first chuck 8, ensure the stability of the position height of the first chuck 8 and the stability of the clamping process, on the other hand, the axial position of the first chuck 8 can be conveniently changed by the sliding of the chuck sliding block 30 and the second rail seat 25.

[0046] Further, in the embodiment, the first power assembly 4 includes a first motor 33, a first speed reducer 34, a power wheel 35, a synchronous wheel 36 and a belt 37, the first motor 33 is placed on the table top 1, and the first motor 33 is arranged in parallel with the first screw 18, the first motor 33 is inserted with the first speed reducer 34, a motor seat is sleeved on the first speed reducer 34, the motor seat is bolted with the table top 1, so that the first speed reducer 34 is limited on the table top 1, the end of the first speed reducer 34 away from the first motor 33 is bolted with the power wheel 35, the synchronous wheel 36 is sleeved and bolted on the first screw 18, the belt 37 is sleeved on the power wheel 35 and the synchronous wheel 36, so that the first motor 33 rotates, the first speed reducer 34 transmits the rotation to the power wheel 35, the power wheel 35 transmits the rotation to the belt 37, the belt 37 transmits the rotation to the synchronous wheel 36, the synchronous wheel 36 is connected with the first screw 18, so that the first screw 18 rotates synchronously, and then drives the first nut 19 on the first screw 18 to axially displace on the first screw 18.

[0047] Further, in the embodiment, the first screw rod 18 is further inserted with a magnetic powder brake 38 at one end away from the nut seat 22, the magnetic powder brake 38 is electrically connected with the first motor 33, the magnetic powder brake 38 is a load, so that when the first detection mechanism 2 is in a motion state, the first power assembly 4 is started, at this time the magnetic powder brake 38 is in an open state, when the first detection mechanism 2 is in a standby state, the first power assembly 4 is static, at this time the magnetic powder brake 38 is in a working state, so that the magnetic powder brake 38 is used to lock the first detection mechanism 2.

[0048] Further, in the embodiment, referring to Figs. 5-6, the third detection mechanism 39 is located behind the second detection mechanism 3, the third detection mechanism 39 includes a third sliding table assembly 40, a third chuck 41, a fourth chuck 42, a main shaft 16, a fourth speed reducer and a fourth motor 44, the third sliding table assembly 40 includes a third linear rail seat 45, a third sliding block 46 and a sliding table 47, the third linear rail seat 45 is symmetrically bolted on the upper side of the table 1, the third sliding block 46 is matched with the third linear rail seat 45, the third sliding block 46 is slidingly connected with the third linear rail seat 45, the sliding table 47 is bolted on the upper side of the third sliding block 46, the upper side of the sliding table 47 is bolted with a bearing seat 56, the main shaft 16 is also inserted into the bearing seat 56 in the axial direction, the left end of the main shaft 16 is provided with a counterbore, the counterbore can be used to accommodate a certain length of the measured screw rod of the measured screw rod assembly, the right end of the main shaft 16 is provided with a circular protrusion, the left end of the main shaft 16 is bolted with the fourth chuck 42, the fourth chuck 42 has the same structure as the second chuck 17, the fourth chuck 42 can be used to cooperate with the measured nut of the measured screw rod assembly, the right end of the main shaft 16 is inserted with a shaft coupling 55, the right end of the shaft coupling 55 is inserted with the fourth speed reducer, the other end of the fourth speed reducer is inserted with the fourth motor 44, the bearing seat 56 is bolted with the table 1 at the position relative to the fourth chuck 42, the third chuck 41 is bolted with the bearing seat 56, the third chuck 41 can be used to cooperate with the measured screw rod of the measured screw rod assembly, and the axial direction of the third chuck 41 is located on the same straight line as the axial direction of the fourth chuck 42, the table 1 is bolted with a distance meter at one end of the third chuck 41, the distance meter is arranged relative to the sliding table 47, so that the distance meter can detect and record the distance between itself and the sliding table 47 in real time, the measured screw rod end of the measured screw rod assembly is installed on the third chuck 41, the measured nut end is installed on the fourth chuck 42, the fourth motor 44 rotates, the fourth speed reducer transmits the rotation to the main shaft 16, the main shaft 16 transmits the rotation to the fourth chuck 42, the fourth chuck 42 drives the measured nut to rotate on the measured screw rod, thereby making the measured nut axially displace on the measured screw rod, thereby making the sliding table 47 axially displace on the third linear rail seat 45 through the third sliding block 46, the distance meter measures the distance between the third chuck 41 and the sliding table 47 to measure the linear running speed of the measured screw rod assembly, thereby obtaining relevant speed data; and the measured screw rod end of the measured screw rod assembly can also be installed on the fourth chuck 42, and the measured nut end is installed on the third chuck 41.

[0049] Further, in the embodiment, the installation positions of the third chuck 41 and the fourth chuck 42 can be interchanged, so that the fourth chuck 42 cooperates with the measured screw rod end of the measured screw rod assembly, and the third chuck 41 cooperates with the measured nut end of the measured screw rod assembly.

[0050] Further, in the embodiment, the anti-collision block 48 is bolted to the front end and the rear end of the third rail seat 45, so that the anti-collision block 48 is located on the running route of the sliding table 47, and the anti-collision block 48 can not only limit the displacement range of the sliding table 47, but also can conveniently and clearly understand the effective starting point and the effective ending point of the speed curve of the to-be-measured screw rod assembly through the emergency braking point of the speed curve when the staff connects the distance meter to the upper instrument.

[0051] Further, in the embodiment, the control screen is also bolted to the table top 1, the software related to the screw rod detection is installed in the control screen, so that the user can not only control the screw rod detection device through the control screen, but also can set various parameters of the screw rod detection, the control screen is electrically connected with the first motor 33, the magnetic powder brake 38, the second motor 23, the third motor 31 and the fourth motor 44, and the control screen is signal connected with the tension and pressure sensor 7, the torque sensor 15 and the distance meter, so that the control screen can record and analyze the tension and pressure data transmitted by the tension and pressure sensor 7, the torque data transmitted by the torque sensor 15 and the linear velocity data transmitted by the distance meter, and then the data processing is carried out through the built-in software of the control screen, the manual participation is reduced, and the generation of the detection result is convenient.

[0052] Further, in the embodiment, the foot 50 is arranged below the table top 1, and the baffle 43 is bolted to the foot 50, so that the height of the table top 1 can be set by setting the height of the foot 50, and the height of the table top 1 can be freely combined to the height convenient for production.

[0053] Further, in the embodiment, the specific structure and position of the first power assembly 4 are not particularly limited, and the power assembly capable of realizing the start-stop function of the rotation of the first screw rod 18 known by the person skilled in the art can be used, and the person skilled in the art can select and adjust according to the specific application situation and product requirements.

[0054] Further, in the embodiment, the specific structure of the first chuck 8, the second chuck 17, the third chuck 41 and the fourth chuck 42 is not particularly limited, and the chuck capable of realizing the connection with the to-be-measured screw rod assembly known by the person skilled in the art can be used, and the person skilled in the art can select and adjust according to the specific application situation and product requirements.

[0055] Further, in the embodiment, the specific structure of the first sliding table assembly 6, the second sliding table assembly 11 and the third sliding table assembly 40 is not particularly limited, and the sliding connection known by the person skilled in the art can be used, and the person skilled in the art can select and adjust according to the specific application situation and product requirements.

[0056] Further, in the embodiment, the position of the range finder is not particularly limited, and the range finder can be any range finder capable of measuring the distance between the third chuck 41 and the fourth chuck 42, as is well known to those skilled in the art. Those skilled in the art can select and adjust the range finder according to the specific application and product requirements.

[0057] It should be noted that the embodiments of the present application can be combined into new embodiments as long as the schemes do not conflict and the technical schemes can coexist.

[0058] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A lead screw detection device, characterized by: The utility model provides a kind of testing device, including table top (1), first detection mechanism (2) and second detection mechanism (3), the first detection mechanism (2) and the second detection mechanism (3) are located on the table top (1), and the first detection mechanism (2) with the second detection mechanism (3) are located on the same straight line; The first detection mechanism (2) includes first power assembly (4), first screw rod assembly (5), first sliding table assembly (6), tension and compression force sensor (7) and first chuck (8), one end of the first screw rod assembly (5) is connected with the first power assembly (4), the other end is located on the first sliding table assembly (6), the first screw rod assembly (5) is connected with the tension and compression force sensor (7) at one end close to the first sliding table assembly (6), the first chuck (8) is connected with the tension and compression force sensor (7), so that first screw rod assembly (5) can drive first chuck (8) and tension and compression force sensor (7) to carry out axial displacement; The second detection mechanism (3) includes upper detection mechanism (9) and lower detection mechanism (10), the lower detection mechanism (10) includes second sliding table assembly (11), second screw rod assembly (12) and second power assembly (13), the second sliding table assembly (11) is arranged on the table top (1), one end of the second screw rod assembly (12) is connected with the second sliding table assembly (11), and the other end is connected with the second power assembly (13), the upper detection mechanism (9) is located on the second sliding table assembly (11), so that the lower detection mechanism (10) can drive the upper detection mechanism (9) to carry out axial displacement, the upper detection mechanism (9) includes third power assembly (14), torque sensor (15), main shaft (16) and second chuck (17), the third power assembly (14) is connected with one end of the torque sensor (15), the other end of the torque sensor (15) is connected with one end of the main shaft (16), the other end of the main shaft (16) is connected with the second chuck (17); The axial direction of the first chuck (8) is located on the same straight line with the axial direction of the second chuck (17).

2. The lead screw detection apparatus of claim 1, wherein: The first screw rod assembly (5) includes first screw rod (18) and first nut (19), the first sliding table assembly (6) includes first wire rail seat (20), first sliding block (21) and nut seat (22), one end of the first screw rod (18) is connected with the first power assembly (4), the other end is connected with the first nut (19), the first nut (19) is connected with one end of the nut seat (22), the other end of the nut seat (22) is connected with one end of the tension and compression force sensor (7), the other end of the tension and compression force sensor (7) is connected with the first chuck (8), the nut seat (22) is also connected with the first sliding block (21), and the first sliding block (21) cooperates with the first wire rail seat (20).

3. The lead screw detection device of claim 2, wherein: The second power assembly (13) comprises a second motor (23) and a second speed reducer (24), the second sliding table assembly (11) comprises a second linear rail base (25), a second sliding block (26) and a large sliding table (27), the second screw rod assembly (12) comprises a second screw rod (28) and a second nut (29), the two second linear rail bases (25) are symmetrically arranged on the table top (1), the second sliding block (26) is matched with the second linear rail base (25), the large sliding table (27) is arranged on the second sliding block (26), the large sliding table (27) is connected with the second nut (29), the second nut (29) is connected with the second screw rod (28), one end of the second screw rod (28) is located between the two second linear rail bases (25), and the other end of the second screw rod (28) is connected with the second speed reducer (24), one end of the second speed reducer (24) is connected with the second motor (23), and the upper detection mechanism (9) is located on the large sliding table (27).

4. The lead screw detection apparatus of claim 3, wherein: The first chuck (8) is provided with a chuck sliding block (30), and the chuck sliding block (30) is matched with the second linear rail base (25).

5. The lead screw detection device of claim 1, wherein: The third power assembly (14) comprises a third motor (31) and a third speed reducer (32), the third motor (31) is connected with the third speed reducer (32), the third speed reducer (32) is connected with the torque sensor (15), the torque sensor (15) is connected with the main shaft (16), and the main shaft (16) is connected with the second chuck (17).

6. The lead screw detection apparatus of claim 1, wherein: The first power assembly (4) comprises a first motor (33), a first speed reducer (34), a power wheel (35), a synchronous wheel (36) and a belt (37), the first speed reducer (34) is connected with the first motor (33), the power wheel (35) is connected with the first speed reducer (34), the synchronous wheel (36) is connected with the first screw rod assembly (5), and the belt (37) is located on the power wheel (35) and the synchronous wheel (36); the first screw rod assembly (5) is further provided with a magnetic powder brake (38), and the magnetic powder brake (38) is electrically connected with the first power assembly (4).

7. The lead screw detection apparatus of claim 1, wherein: The third detection mechanism (39) is located on the table top (1), and the third detection mechanism (39) comprises a third sliding table assembly (40), a third chuck (41), a fourth chuck (42), a main shaft (16) and a fourth motor (44), the third sliding table assembly (40) comprises a third linear rail seat (45), a third sliding block (46) and a sliding table (47), the third linear rail seat (45) is symmetrically arranged on the table top (1), the third sliding block (46) is matched with the third linear rail seat (45), the sliding table (47) is connected with the third sliding block (46), the fourth motor (44) is located on the sliding table (47), the fourth motor (44) is connected with one end of the main shaft (16), the other end of the main shaft (16) is connected with the fourth chuck (42), the third chuck (41) is arranged on the table top (1), and the third chuck (41) is arranged relative to the fourth chuck (42), the axial direction of the third chuck (41) is located on the same straight line with the axial direction of the fourth chuck (42), and the table top (1) is provided with a range finder at the third chuck (41) or the fourth chuck (42).

8. The lead screw detection device of claim 7, wherein: The table top (1) is provided with a collision block (48) on the running route of the sliding table (47).

9. The lead screw detection device of claim 7, wherein: The control screen is located on the table top (1), and the control screen is electrically connected with the first detection mechanism (2), the second detection mechanism (3) and the third detection mechanism (39).

10. The lead screw detection device of claim 1, wherein: The table top (1) is provided with a supporting leg (50).

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