CN112504662A - Device for measuring transmission efficiency of ball screw pair based on gear shifting mechanism - Google Patents

Device for measuring transmission efficiency of ball screw pair based on gear shifting mechanism Download PDF

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Publication number
CN112504662A
CN112504662A CN201910792127.4A CN201910792127A CN112504662A CN 112504662 A CN112504662 A CN 112504662A CN 201910792127 A CN201910792127 A CN 201910792127A CN 112504662 A CN112504662 A CN 112504662A
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CN
China
Prior art keywords
shaft
screw pair
transmission
nut
running
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Pending
Application number
CN201910792127.4A
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Chinese (zh)
Inventor
潘承莹
祖莉
林炜国
欧屹
王烨
李怀
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Application filed by Nanjing University of Science and Technology filed Critical Nanjing University of Science and Technology
Priority to CN201910792127.4A priority Critical patent/CN112504662A/en
Publication of CN112504662A publication Critical patent/CN112504662A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • G01M13/02Gearings; Transmission mechanisms

Abstract

The invention discloses a device for measuring the transmission efficiency of a ball screw pair based on a gear shifting mechanism, which comprises a lathe bed, and a motor, a brake, the gear shifting mechanism, a main shaft system, an auxiliary shaft system, a nut axial speed measuring module, a nut axial force measuring module and a rotating speed torque measuring module which are arranged on the lathe bed. The device has simple overall principle, and can realize the measurement of the transmission efficiency in each state through the meshing relation between gears and the conversion of the steering of the motor and the eddy current brake after clamping the screw rod once, wherein the states comprise no load in forward transmission forward stroke, no load in forward transmission reverse stroke, load in reverse transmission forward stroke, no load in reverse transmission forward stroke, load in reverse transmission reverse stroke and no load in reverse transmission reverse stroke. The invention has the advantages of high transmission precision, compact structure, reliable work, long service life and simple and reliable control, and greatly improves the practical performance and the operating performance of the device.

Description

Device for measuring transmission efficiency of ball screw pair based on gear shifting mechanism
Technical Field
The invention belongs to the field of transmission efficiency of a ball screw pair, and particularly relates to a device for measuring the transmission efficiency of the ball screw pair based on a gear shifting mechanism.
Background
The ball screw pair is an important functional component in the manufacturing industry, and is widely applied to the fields of machinery manufacturing, the automobile industry, aerospace, ship manufacturing industry, medical appliances, national defense industry, nuclear power and the like. The domestic products and foreign products still have larger differences, and the control aspects of precision, maximum DN value, maximum speed, maximum acceleration, noise and temperature rise are obviously lagged behind the foreign similar products. Therefore, the improvement of efficiency and quality is the direction of the development of domestic ball screw assembly. In the special fields of military industry and the like, the transmission efficiency is the first index. The domestic manufacturer has urgent requirements on detection of transmission efficiency, lacks corresponding detection equipment, does not actually measure the actual transmission effect of the ball screw pair, and only has single theoretical prediction on different types and different use conditions of the ball screw pair. Therefore, a special test device for measuring the transmission efficiency of the ball screw pair in each state needs to be developed, and the blank in the aspect is filled.
In the domestic ball screw pair industry, some preliminary test devices are provided aiming at the aspect of efficiency measurement, but the common method is to firstly positively install a screw and then measure the transmission efficiency of the screw by loading; and then disassembling, reversely assembling and loading the screw rod, and measuring the transmission efficiency of the screw rod. The method for measuring the transmission efficiency of the lead screw is not only low in efficiency, but also cannot measure the transmission efficiency of the lead screw during reverse transmission. Alternatively, after the friction torque is measured, the side surface determines the forward transmission efficiency, and the transmission efficiency in each state cannot be measured. Therefore, the test bed for researching and measuring the transmission efficiency of the ball screw pair meets the practical requirement.
Disclosure of Invention
The invention aims to provide a transmission efficiency measuring device which can complete the measurement of transmission efficiency in each state and has the characteristics of high transmission precision, compact structure, reliable work, long service life, simple and reliable control and the like.
The technical solution for realizing the purpose of the invention is as follows: the device for measuring the transmission efficiency of the ball screw pair based on the gear shifting mechanism comprises a lathe bed, and a motor, a brake, the gear shifting mechanism, a main shaft system, an auxiliary shaft system, a nut axial speed measuring module, a nut axial force measuring module and a rotating speed and torque measuring module which are arranged on the lathe bed;
the gear shifting mechanism is switched to be in a positive transmission no-load state, the motor drives the tested lead screw pair on the main shaft system to rotate, the nut of the tested lead screw pair is driven to move axially, and the nut of the tested lead screw pair drives the running-accompanying lead screw pair on the auxiliary shaft system to rotate;
the gear shifting mechanism is switched to be in a positive transmission loaded state, the motor drives the tested lead screw pair on the main shaft system to rotate and drives the nut of the tested lead screw pair to axially move, the nut of the tested lead screw pair drives the running-accompanying lead screw pair on the auxiliary shaft system to rotate, and the running-accompanying lead screw pair is loaded by the brake;
the gear shifting mechanism is switched to be in a reverse transmission no-load state, the motor drives the running-accompanying lead screw pair on the auxiliary shaft system to rotate, a nut of the running-accompanying lead screw pair is driven to move axially, and a nut of the running-accompanying lead screw pair drives a tested lead screw pair on the main shaft system to rotate;
the gear shifting mechanism is switched to be in a reverse transmission loaded state, the motor drives the running-accompanying screw pair on the auxiliary shaft system to rotate, the nut of the running-accompanying screw pair is driven to axially move, the nut of the running-accompanying screw pair drives the tested screw pair on the main shaft system to rotate, and the tested screw pair is loaded by the brake;
under each state, a rotating speed and torque measuring module on the main shaft system measures the rotating speed and torque of the tested screw pair, a nut axial speed measuring module measures the axial speed of a nut of the tested screw pair, and a nut axial force measuring module measures the axial force of the nut of the tested screw pair.
Compared with the prior art, the invention has the following remarkable advantages: 1) the overall principle is simple, and after the lead screw is clamped once, the transmission efficiency measurement in each state can be realized through the meshing relationship between the gears and the conversion of the steering of the motor and the brake, wherein the states comprise no load in forward transmission forward stroke, no load in forward transmission reverse stroke, no load in reverse transmission forward stroke, no load in reverse transmission reverse stroke and no load in reverse transmission reverse stroke; 2) the transmission precision is high, the structure is compact, the work is reliable, the service life is long, the control is simple and reliable, and the practicability and the operation performance of the device are greatly improved; 3) adopt horizontal structure, the lathe bed cooperatees adjustably with the tailstock, can adapt to different lead screws.
The present invention is described in further detail below with reference to the attached drawing figures.
Drawings
Fig. 1 is a general structural schematic diagram of a device for measuring the transmission efficiency of a ball screw pair based on a gear shifting mechanism.
Fig. 2 is a schematic view of the overall structure of the gear shifting mechanism of the measuring device of the present invention.
FIG. 3 is a schematic view of a driving shaft system of the measuring device of the present invention.
FIG. 4 is a schematic view of a measured axis system of the measuring apparatus of the present invention.
Fig. 5 is a schematic view of a running axis system of the measuring device of the present invention.
FIG. 6 is a schematic view of a loading axis system of the measuring device of the present invention.
FIG. 7 is a schematic view of a spindle system of the measuring device of the present invention.
FIG. 8 is a schematic view of a secondary shaft system of the measuring device of the present invention.
FIG. 9 is a schematic view of the connection between the first and second work tables of the measuring device of the present invention.
Detailed Description
With reference to fig. 1, the device for measuring the transmission efficiency of the ball screw pair based on the gear shifting mechanism comprises a bed body 8, and a motor 1, a brake 2, a gear shifting mechanism 3, a main shaft system 4, an auxiliary shaft system 5, a nut axial speed measuring module 6, a nut axial force measuring module 7 and a rotating speed and torque measuring module 9 which are arranged on the bed body 8;
the gear shifting mechanism 3 is switched to be in a positive transmission no-load state, the motor 1 drives a tested lead screw pair on the main shaft system 4 to rotate, a nut of the tested lead screw pair is driven to move axially, and a nut of the tested lead screw pair drives an accompanying running lead screw pair on the auxiliary shaft system 5 to rotate;
the gear shifting mechanism 3 is in a positive transmission loaded state, the motor 1 drives a tested lead screw pair on the main shaft system 4 to rotate, a nut of the tested lead screw pair is driven to move axially, a nut of the tested lead screw pair drives an auxiliary running lead screw pair on the auxiliary shaft system 5 to rotate, and the auxiliary running lead screw pair is loaded by the brake 2;
the gear shifting mechanism 3 is switched to be in a reverse transmission no-load state, the motor 1 drives the running-accompanying screw pair on the auxiliary shaft system 5 to rotate, a nut of the running-accompanying screw pair is driven to move axially, and a nut of the running-accompanying screw pair drives a tested screw pair on the main shaft system 4 to rotate;
the gear shifting mechanism 3 is in a reverse transmission loaded state, the motor 1 drives the running-accompanying screw pair on the auxiliary shaft system 5 to rotate, the nut of the running-accompanying screw pair is driven to axially move, the nut of the running-accompanying screw pair drives the tested screw pair on the main shaft system 4 to rotate, and the tested screw pair is loaded by the brake 2;
in each state, the rotation speed and the torque of the tested screw pair are measured by a rotation speed and torque measuring module 9 on the main shaft system 4, the axial speed of the nut of the tested screw pair is measured by a nut axial speed measuring module 6, and the axial force of the nut of the tested screw pair is measured by a nut axial force measuring module 7.
Further, with reference to fig. 2, the gear shifting mechanism 3 includes a driving shaft system 3-1, a measured shaft system 3-2, a running shaft system 3-3, and a loading shaft system 3-4;
the gear shifting mechanism 3 is in a positive transmission no-load state, the driving shaft system 3-1 transmits power to the tested shaft system 3-2, and the tested shaft system 3-2 transmits power to the main shaft system 4;
the gear shifting mechanism 3 is in a positive transmission loaded state, the driving shaft system 3-1 transmits power to the tested shaft system 3-2, the tested shaft system 3-2 transmits power to the main shaft system 4, meanwhile, the loading shaft system 3-4 brakes the running accompanying shaft system 3-3, and the running accompanying shaft system 3-3 brakes the auxiliary shaft system 5;
the gear shifting mechanism 3 is in a reverse transmission no-load state, the driving shaft system 3-1 transmits power to the running accompanying shaft system 3-3, and the running accompanying shaft system 3-3 transmits power to the auxiliary shaft system 5;
the gear shifting mechanism 3 is in a reverse transmission loaded state, the driving shaft system 3-1 transmits power to the running accompanying shaft system 3-3, the running accompanying shaft system 3-3 transmits power to the auxiliary shaft system 5, meanwhile, the loading shaft system 3-4 brakes the measured shaft system 3-2, and the measured shaft system 3-2 brakes the main shaft system 4.
Further, referring to fig. 3, the driving shaft system 3-1 includes a first fixed supporting unit 3-1-1, a first spline shaft 3-1-2, and a first sliding gear 3-1-3; the first spline shaft 3-1-2 is installed on the lathe bed 8 through a first fixed supporting unit 3-1-1, and the first sliding gear 3-1-3 is arranged on the first spline shaft 3-1-2 and can axially move along the first spline shaft 3-1-2; one end of the first spline shaft 3-1-2 is connected with the motor 1;
referring to fig. 4, the measured shaft system 3-2 includes a second fixed supporting unit 3-2-1, a first transmission gear 3-2-2, and a first transmission shaft 3-2-3; the first transmission shaft 3-2-3 is arranged on the lathe bed 8 through the second fixed supporting unit 3-2-1; the first transmission gear 3-2-2 is fixedly connected to the first transmission shaft 3-2-3;
referring to fig. 5, the running axis system 3-3 includes a third fixed supporting unit 3-3-1, a second transmission gear 3-3-2, and a second transmission shaft 3-3-3; the second transmission shaft 3-3-3 is arranged on the lathe bed 8 through a third fixed supporting unit 3-3-1; the second transmission gear 3-3-2 is fixedly connected to the second transmission shaft 3-3-3;
referring to fig. 6, the loading shaft system 3-4 includes a fourth fixed supporting unit 3-4-1, a second sliding gear 3-4-2, and a second spline shaft 3-4-3; the second spline shaft 3-4-3 is installed on the lathe bed 8 through a fourth fixed supporting unit 3-4-1, and the second sliding gear 3-4-2 is arranged on the second spline shaft 3-4-3 and can axially move along the second spline shaft 3-4-3; one end of the second spline shaft 3-4-3 is connected with the brake 2;
the gear shifting mechanism 3 is in a positive transmission no-load state, and the first sliding gear 3-1-3 is meshed with the first transmission gear 3-2-2; when the positive transmission is in a loaded state, on the basis of the engagement, the second sliding gear 3-4-2 is engaged with the second transmission gear 3-3-2;
the gear shifting mechanism 3 is in a reverse transmission no-load state, and the first sliding gear 3-1-3 is meshed with the second transmission gear 3-3-2; when the reverse transmission is in a loaded state, the second sliding gear 3-4-2 is meshed with the first transmission gear 3-2-2 on the basis of meshing.
Further, referring to fig. 7, the main shaft system 4 includes a tested lead screw pair 4-1, a first nut seat 4-2, a fifth fixed supporting unit 4-3, a first worktable 4-4, a first guide rail set 4-5 disposed on the bed 8, and a first slide block set 4-6 disposed on the first guide rail set 4-5; the fifth fixed supporting unit 4-3 comprises a headstock 4-3-1 and a tailstock 4-3-2; a first workbench 4-4 is arranged on the first sliding block group 4-6, and a first nut seat 4-2 is arranged on the first workbench 4-4; two ends of the rotating speed and torque measuring module 9 are respectively connected with one end of a measured shaft system 3-2 and one end of a measured lead screw pair 4-1 through a coupler, the ends are installed on the lathe bed 8 through a headstock 4-3-1, a nut of the measured lead screw pair 4-1 is fixedly connected with a first nut seat 4-2 to prevent the nut from moving circumferentially, the other end of the measured lead screw pair 4-1 is installed on the lathe bed 8 through a tailstock 4-3-2 capable of sliding on the lathe bed 8 along the axial direction of the measured lead screw pair 4-1, and the tailstock 4-3-2 is locked after fixing the measured lead screw pair 4-1.
Exemplarily, the sliding of the tailstock 4-3-2 on the bed 8 is specifically: the tail stock 4-3-2 slides on the bed body 8 along the axial direction of the tested lead screw pair 4-1 through a groove arranged on the bed body 8.
Further, referring to fig. 8, the auxiliary shaft system 5 includes a running screw pair 5-1, a second nut seat 5-2, a sixth fixed supporting unit 5-3, a second worktable 5-4, a second guide rail set 5-5 disposed on the bed 8, and a second slide block set 5-6 disposed on the second guide rail set 5-5; a second workbench 5-4 is arranged on the second guide rail group 5-5, and a second nut seat 5-2 is arranged on the second workbench 5-4; one end of the running-accompanying lead screw pair 5-1 is connected with the running-accompanying shaft system 3-3 through a coupler, and a nut of the running-accompanying lead screw pair 5-1 is fixedly connected with the second nut seat 5-2 so as to prevent the nut from moving in the circumferential direction.
Illustratively, the first nut seat 4-2 and the second nut seat 5-2 both comprise an upper end cover and a lower end cover, the upper end cover is movably connected with the lower end cover, and nuts are fixedly connected between the upper end cover and the lower end cover.
Further, referring to fig. 9, the first working platform 4-4 is connected with the second working platform 5-4 through a rigid element 10 to realize power transmission.
Illustratively, the nut axial speed measuring module 6 specifically adopts a laser displacement sensor; the nut axial force measuring module 7 is embodied as a strain gauge, which is attached to the rigid element 10.
Illustratively, the bed 8 is made of a metal material.
The present invention will be described in further detail with reference to examples.
Example 1
With reference to fig. 1, the device for measuring the transmission efficiency of the ball screw pair based on the gear shifting mechanism comprises a bed body 8, and a motor 1, an eddy current brake 2, a gear shifting mechanism 3, a main shaft system 4, an auxiliary shaft system 5, a nut axial speed measuring module 6, a nut axial force measuring module 7 and a rotating speed and torque measuring module 9 which are arranged on the bed body 8;
the gear shifting mechanism 3 is switched to be in a positive transmission no-load state, the motor 1 drives a tested lead screw pair on the main shaft system 4 to rotate, a nut of the tested lead screw pair is driven to move axially, and a nut of the tested lead screw pair drives an accompanying running lead screw pair on the auxiliary shaft system 5 to rotate;
the gear shifting mechanism 3 is in a positive transmission loaded state, the motor 1 drives a tested lead screw pair on the main shaft system 4 to rotate, a nut of the tested lead screw pair is driven to move axially, a nut of the tested lead screw pair drives an auxiliary running lead screw pair on the auxiliary shaft system 5 to rotate, and the auxiliary running lead screw pair is loaded by the brake 2;
the gear shifting mechanism 3 is switched to be in a reverse transmission no-load state, the motor 1 drives the running-accompanying screw pair on the auxiliary shaft system 5 to rotate, a nut of the running-accompanying screw pair is driven to move axially, and a nut of the running-accompanying screw pair drives a tested screw pair on the main shaft system 4 to rotate;
the gear shifting mechanism 3 is in a reverse transmission loaded state, the motor 1 drives the running-accompanying screw pair on the auxiliary shaft system 5 to rotate, the nut of the running-accompanying screw pair is driven to axially move, the nut of the running-accompanying screw pair drives the tested screw pair on the main shaft system 4 to rotate, and the tested screw pair is loaded by the brake 2;
in each state, the rotation speed and the torque of the tested screw pair are measured by a rotation speed and torque measuring module 9 on the main shaft system 4, the axial speed of the nut of the tested screw pair is measured by a nut axial speed measuring module 6, and the axial force of the nut of the tested screw pair is measured by a nut axial force measuring module 7.
Example 2
On the basis of the embodiment 1, with reference to fig. 2, the gear shifting mechanism 3 comprises a driving shaft system 3-1, a measured shaft system 3-2, an accompanying running shaft system 3-3 and a loading shaft system 3-4;
referring to fig. 3, the driving shaft system 3-1 includes a first fixed supporting unit 3-1-1, a first spline shaft 3-1-2, and a first sliding gear 3-1-3; the first spline shaft 3-1-2 is installed on the lathe bed 8 through a first fixed supporting unit 3-1-1, and the first sliding gear 3-1-3 is arranged on the first spline shaft 3-1-2 and can axially move along the first spline shaft 3-1-2; one end of the first spline shaft 3-1-2 is connected with the motor 1;
referring to fig. 4, the measured shaft system 3-2 includes a second fixed supporting unit 3-2-1, a first transmission gear 3-2-2, and a first transmission shaft 3-2-3; the first transmission shaft 3-2-3 is arranged on the lathe bed 8 through the second fixed supporting unit 3-2-1; the first transmission gear 3-2-2 is fixedly connected to the first transmission shaft 3-2-3;
referring to fig. 5, the running axis system 3-3 includes a third fixed supporting unit 3-3-1, a second transmission gear 3-3-2, and a second transmission shaft 3-3-3; the second transmission shaft 3-3-3 is arranged on the lathe bed 8 through a third fixed supporting unit 3-3-1; the second transmission gear 3-3-2 is fixedly connected to the second transmission shaft 3-3-3;
referring to fig. 6, the loading shaft system 3-4 includes a fourth fixed supporting unit 3-4-1, a second sliding gear 3-4-2, and a second spline shaft 3-4-3; the second spline shaft 3-4-3 is installed on the lathe bed 8 through a fourth fixed supporting unit 3-4-1, and the second sliding gear 3-4-2 is arranged on the second spline shaft 3-4-3 and can axially move along the second spline shaft 3-4-3; one end of the second spline shaft 3-4-3 is connected with the brake 2;
the gear shifting mechanism 3 is in a positive transmission no-load state, and the first sliding gear 3-1-3 is meshed with the first transmission gear 3-2-2; when the positive transmission is in a loaded state, on the basis of the engagement, the second sliding gear 3-4-2 is engaged with the second transmission gear 3-3-2;
the gear shifting mechanism 3 is in a reverse transmission no-load state, and the first sliding gear 3-1-3 is meshed with the second transmission gear 3-3-2; when the reverse transmission is in a loaded state, the second sliding gear 3-4-2 is meshed with the first transmission gear 3-2-2 on the basis of meshing.
Example 3
On the basis of the embodiment 2, with reference to fig. 7, the main shaft system 4 includes a tested lead screw pair 4-1, a first nut seat 4-2, a fifth fixed supporting unit 4-3, a first worktable 4-4, a first guide rail group 4-5 arranged on the bed 8, and a first slide block group 4-6 arranged on the first guide rail group 4-5; the fifth fixed supporting unit 4-3 comprises a headstock 4-3-1 and a tailstock 4-3-2; a first workbench 4-4 is arranged on the first sliding block group 4-6, and a first nut seat 4-2 is arranged on the first workbench 4-4; two ends of the rotating speed and torque measuring module 9 are respectively connected with one end of a measured shaft system 3-2 and one end of a measured lead screw pair 4-1 through a coupler, the end is installed on the lathe bed 8 through a headstock 4-3-1, a nut of the measured lead screw pair 4-1 is fixedly connected with a first nut seat 4-2 to prevent the nut from moving circumferentially, the other end of the measured lead screw pair 4-1 is installed on the lathe bed 8 through a tailstock 4-3-2 which can slide along a V-shaped groove arranged on the lathe bed 8 in the axial direction of the measured lead screw pair 4-1, and the tailstock 4-3-2 is locked by a bolt which is arranged in a T-shaped groove on the lathe bed 8 and penetrates through the tailstock after the measured lead screw pair 4-1 is fixed.
Example 4
On the basis of the embodiment 3, with reference to fig. 8, the secondary shaft system 5 comprises a running screw pair 5-1, a second nut seat 5-2, a sixth fixed supporting unit 5-3, a second worktable 5-4, a second guide rail group 5-5 arranged on the lathe bed 8, and a second slide block group 5-6 arranged on the second guide rail group 5-5; a second workbench 5-4 is arranged on the second guide rail group 5-5, and a second nut seat 5-2 is arranged on the second workbench 5-4; one end of the running-accompanying lead screw pair 5-1 is connected with the running-accompanying shaft system 3-3 through a coupler, and a nut of the running-accompanying lead screw pair 5-1 is fixedly connected with the second nut seat 5-2 so as to prevent the nut from moving in the circumferential direction.
Example 5
On the basis of the embodiment 4, referring to fig. 9, the first working platform 4-4 and the second working platform 5-4 are connected through the rigid element 10 to realize power transmission, and the rigid element is respectively clamped in the grooves arranged on the first working platform 4-4 and the second working platform 5-4.
The invention adopts gears to shift gears, has high transmission precision, compact structure, reliable work and long service life, and can finish the measurement of transmission efficiency under all working conditions by one-time clamping.

Claims (10)

1. The device for measuring the transmission efficiency of the ball screw pair based on the gear shifting mechanism is characterized by comprising a lathe bed (8), and a motor (1), a brake (2), the gear shifting mechanism (3), a main shaft system (4), an auxiliary shaft system (5), a nut axial speed measuring module (6), a nut axial force measuring module (7) and a rotating speed and torque measuring module (9) which are arranged on the lathe bed (8);
the gear shifting mechanism (3) is switched to be in a positive transmission no-load state, the motor (1) drives a tested lead screw pair on the main shaft system (4) to rotate to drive a nut of the tested lead screw pair to axially move, and the nut of the tested lead screw pair drives an accompanying running lead screw pair on the auxiliary shaft system (5) to rotate;
the gear shifting mechanism (3) is switched to be in a positive transmission loaded state, the motor (1) drives a tested lead screw pair on the main shaft system (4) to rotate to drive a nut of the tested lead screw pair to axially move, the nut of the tested lead screw pair drives an accompanying lead screw pair on the auxiliary shaft system (5) to rotate, and the accompanying lead screw pair is loaded by the brake (2);
the gear shifting mechanism (3) is switched to be in a reverse transmission no-load state, the motor (1) drives the running-accompanying screw pair on the auxiliary shaft system (5) to rotate, a nut of the running-accompanying screw pair is driven to move axially, and a nut of the running-accompanying screw pair drives a tested screw pair on the main shaft system (4) to rotate;
the gear shifting mechanism (3) is switched to be in a reverse transmission loaded state, the motor (1) drives the running-accompanying screw pair on the auxiliary shaft system (5) to rotate, a nut of the running-accompanying screw pair is driven to axially move, a nut of the running-accompanying screw pair drives a tested screw pair on the main shaft system (4) to rotate, and the tested screw pair is loaded by the brake (2);
in each state, a rotating speed and torque measuring module (9) on the main shaft system (4) measures the rotating speed and torque of the tested lead screw pair, a nut axial speed measuring module (6) measures the axial speed of the nut of the tested lead screw pair, and a nut axial force measuring module (7) measures the axial force of the nut of the tested lead screw pair.
2. The device for measuring the transmission efficiency of the ball screw pair based on the gear shifting mechanism is characterized in that the gear shifting mechanism (3) comprises a driving shaft system (3-1), a tested shaft system (3-2), a running shaft system (3-3) and a loading shaft system (3-4);
the gear shifting mechanism (3) is in a positive transmission no-load state, the driving shaft system (3-1) transmits power to the tested shaft system (3-2), and the tested shaft system (3-2) transmits power to the main shaft system (4);
the gear shifting mechanism (3) is in a positive transmission loaded state, the driving shaft system (3-1) transmits power to the tested shaft system (3-2), the tested shaft system (3-2) transmits power to the main shaft system (4), the loading shaft system (3-4) brakes the running accompanying shaft system (3-3), and the running accompanying shaft system (3-3) brakes the auxiliary shaft system (5);
the gear shifting mechanism (3) is in a reverse transmission no-load state, the driving shaft system (3-1) transmits power to the running shaft system (3-3), and the running shaft system (3-3) transmits power to the auxiliary shaft system (5);
the gear shifting mechanism (3) is in a reverse transmission loaded state, the driving shaft system (3-1) transmits power to the running shaft system (3-3), the running shaft system (3-3) transmits power to the auxiliary shaft system (5), the loading shaft system (3-4) brakes the tested shaft system (3-2), and the tested shaft system (3-2) brakes the main shaft system (4).
3. The gear shifting mechanism-based ball screw pair transmission efficiency measuring device according to claim 2, wherein the driving shaft system (3-1) comprises a first fixed support unit (3-1-1), a first spline shaft (3-1-2), a first sliding gear (3-1-3); the first spline shaft (3-1-2) is installed on the lathe bed (8) through a first fixed supporting unit (3-1-1), and the first sliding gear (3-1-3) is arranged on the first spline shaft (3-1-2) and can move axially along the first spline shaft (3-1-2); one end of the first spline shaft (3-1-2) is connected with the motor (1);
the measured shaft system (3-2) comprises a second fixed supporting unit (3-2-1), a first transmission gear (3-2-2) and a first transmission shaft (3-2-3); the first transmission shaft (3-2-3) is arranged on the lathe bed (8) through the second fixed supporting unit (3-2-1); the first transmission gear (3-2-2) is fixedly connected to the first transmission shaft (3-2-3);
the running accompanying shafting (3-3) comprises a third fixed supporting unit (3-3-1), a second transmission gear (3-3-2) and a second transmission shaft (3-3-3); the second transmission shaft (3-3-3) is arranged on the lathe bed (8) through a third fixed supporting unit (3-3-1); the second transmission gear (3-3-2) is fixedly connected to the second transmission shaft (3-3-3);
the loading shafting (3-4) comprises a fourth fixed supporting unit (3-4-1), a second sliding gear (3-4-2) and a second spline shaft (3-4-3); the second spline shaft (3-4-3) is installed on the lathe bed (8) through a fourth fixed supporting unit (3-4-1), and the second sliding gear (3-4-2) is arranged on the second spline shaft (3-4-3) and can axially move along the second spline shaft (3-4-3); one end of the second spline shaft (3-4-3) is connected with the brake (2);
the gear shifting mechanism (3) is in a positive transmission no-load state, and the first sliding gear (3-1-3) is meshed with the first transmission gear (3-2-2); when the positive transmission is in a loaded state, on the basis of the engagement, the second sliding gear (3-4-2) is engaged with the second transmission gear (3-3-2);
the gear shifting mechanism (3) is in a reverse transmission no-load state, and the first sliding gear (3-1-3) is meshed with the second transmission gear (3-3-2); when the reverse transmission is in a loaded state, on the basis of the meshing, the second sliding gear (3-4-2) is meshed with the first transmission gear (3-2-2).
4. The device for measuring the transmission efficiency of the ball screw pair based on the gear shifting mechanism is characterized in that the main shaft system (4) comprises a tested screw pair (4-1), a first nut seat (4-2), a fifth fixed supporting unit (4-3), a first working table (4-4), a first guide rail group (4-5) arranged on the machine bed (8) and a first sliding block group (4-6) arranged on the first guide rail group (4-5); wherein the fifth fixed supporting unit (4-3) comprises a headstock (4-3-1) and a tailstock (4-3-2); a first workbench (4-4) is arranged on the first sliding block group (4-6), and a first nut seat (4-2) is arranged on the first workbench (4-4); two ends of the rotating speed and torque measuring module (9) are respectively connected with a measured shaft system (3-2) and one end of a measured lead screw pair (4-1) through a coupler, the ends are installed on the lathe bed (8) through a headstock (4-3-1), a nut of the measured lead screw pair (4-1) is fixedly connected with a first nut seat (4-2) to prevent the nut from moving circumferentially, the other end of the measured lead screw pair (4-1) is installed on the lathe bed (8) through a tailstock (4-3-2) capable of axially sliding on the lathe bed (8) along the measured lead screw pair (4-1), and the tailstock (4-3-2) is locked after the measured lead screw pair (4-1) is fixed.
5. The device for measuring the transmission efficiency of a ball screw pair based on a gear shifting mechanism according to claim 4, wherein the tailstock (4-3-2) slides on the bed (8) by: the tail stock (4-3-2) slides on the bed body (8) along the axial direction of the tested lead screw pair (4-1) through a groove arranged on the bed body (8).
6. The device for measuring the transmission efficiency of the ball screw pair based on the gear shifting mechanism is characterized in that the secondary shafting (5) comprises a running screw pair (5-1), a second nut seat (5-2), a sixth fixed supporting unit (5-3), a second workbench (5-4), a second guide rail group (5-5) arranged on the lathe bed (8) and a second sliding block group (5-6) arranged on the second guide rail group (5-5); a second workbench (5-4) is arranged on the second guide rail group (5-5), and a second nut seat (5-2) is arranged on the second workbench (5-4); one end of the running-accompanying lead screw pair (5-1) is connected with the running-accompanying shaft system (3-3) through a coupler, and a nut of the running-accompanying lead screw pair (5-1) is fixedly connected with the second nut seat (5-2) to prevent the nut from moving in the circumferential direction.
7. The device for measuring the transmission efficiency of the ball screw pair based on the gear shifting mechanism is characterized in that the first nut seat (4-2) and the second nut seat (5-2) both comprise an upper end cover and a lower end cover, the upper end cover and the lower end cover are movably connected, and nuts are fixedly connected between the upper end cover and the lower end cover.
8. The device for measuring the transmission efficiency of a ball screw pair based on a gear shifting mechanism according to claim 4 or 6, characterized in that the first working table (4-4) and the second working table (5-4) are connected through a rigid element (10) to realize power transmission.
9. The device for measuring the transmission efficiency of a ball screw pair based on a gear shifting mechanism according to claim 8, characterized in that the nut axial speed measuring module (6) is specifically a laser displacement sensor; the nut axial force measuring module (7) specifically adopts a strain gauge which is attached to the rigid element (10).
10. The device for measuring the transmission efficiency of the ball screw pair based on the gear shifting mechanism is characterized in that the bed (8) is made of a metal material.
CN201910792127.4A 2019-08-26 2019-08-26 Device for measuring transmission efficiency of ball screw pair based on gear shifting mechanism Pending CN112504662A (en)

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Application Number Priority Date Filing Date Title
CN201910792127.4A CN112504662A (en) 2019-08-26 2019-08-26 Device for measuring transmission efficiency of ball screw pair based on gear shifting mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910792127.4A CN112504662A (en) 2019-08-26 2019-08-26 Device for measuring transmission efficiency of ball screw pair based on gear shifting mechanism

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CN112504662A true CN112504662A (en) 2021-03-16

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Application Number Title Priority Date Filing Date
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109029984A (en) * 2018-08-25 2018-12-18 南京理工大学 A kind of fourth gear converted measurement mechanism suitable for ball screw assembly,
CN109100139A (en) * 2018-08-25 2018-12-28 南京理工大学 A kind of lead screw pair transmission efficiency dynamic measurement device and its measurement method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109029984A (en) * 2018-08-25 2018-12-18 南京理工大学 A kind of fourth gear converted measurement mechanism suitable for ball screw assembly,
CN109100139A (en) * 2018-08-25 2018-12-28 南京理工大学 A kind of lead screw pair transmission efficiency dynamic measurement device and its measurement method

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