Robot crossed roller bearing torque measuring device

Abstract

The utility model provides a robot cross roller bearing torque measuring device, which comprises a rack, a driving assembly, a loading assembly and a mounting seat are arranged on the rack, the driving assembly comprises a driving shaft, one end of the driving shaft is connected to the lower part of the mounting seat and can drive the mounting seat to rotate along with the driving shaft, and the other end of the driving shaft is connected to the loading assembly. The mounting seat is used for mounting a to-be-tested bearing on the mounting seat and can form positioning connection with an outer ring of the to-be-tested bearing, the loading assembly comprises a loading shaft and a connecting part, the loading shaft is arranged in a telescopic manner, and the connecting part can be driven by the loading shaft to extend to an inner hole of the to-be-tested bearing to form abutting fit with the inner ring of the to-be-tested bearing. Aiming at the defects in the prior art, the utility model provides the torque measuring device for the crossed roller bearing of the robot, which is convenient for torque detection.

Description

Technical Field

[0001] This utility model relates to the field of bearing measuring devices, and in particular to a torque measuring device for a robot crossed roller bearing. Background Technology

[0002] Robot cross roller bearings are a type of bearing with cross-arranged rollers. During operation, the rollers make line contact with the raceways. When the robot joints move, the rollers roll on the raceways, distributing the load evenly. They can simultaneously resist radial, axial, and moment loads, achieving efficient load bearing in multiple directions, thus supporting the rotation and swinging movements of the robotic arm. Before leaving the factory, robot cross roller bearings often need to undergo various tests, among which bearing torque is a crucial indicator that plays a decisive role in the overall energy consumption of the machine. Generally, there is no specific device in the industry to test the torque of cross roller bearings; only a force gauge can be used for manual, approximate testing. Due to the non-constant rotation state, the measured data can only be used as a rough reference. Currently, for products with relatively large torques, such as cross roller bearings, there is an urgent need for a torque testing device to solve this problem. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a torque measuring device for robot crossed roller bearings that facilitates torque detection.

[0004] To achieve the above objectives, this utility model provides a robot cross roller bearing torque measuring device, including a stand, on which a drive assembly, a loading assembly, and a mounting base are provided. The drive assembly includes a drive shaft, one end of which is connected to the lower part of the mounting base and can drive the mounting base to rotate with it. The mounting base is for mounting the bearing to be tested on it and can form a positioning connection with the outer ring of the bearing to be tested. The loading assembly includes a loading shaft and a connecting part. The loading shaft is telescopically oriented, and the connecting part can extend to the inner hole of the bearing to be tested and form an abutment fit with its inner ring under the drive of the loading shaft.

[0005] The advantages of the above technical solution are as follows: A test bench is set up, and a drive assembly, a loading assembly, and a mounting base are installed on the test bench. The drive shaft in the drive assembly is connected to the bottom of the mounting base, and the mounting base is used for the installation and positioning of the bearing under test. The drive shaft can drive the outer ring of the bearing under test on the mounting base to rotate. The loading assembly is equipped with a telescopic loading shaft, which can drive the connecting part to move up and down. By raising the connecting part, there is enough space between the connecting part and the mounting base, which facilitates installation. After the bearing under test is installed, the loading shaft drives the connecting part to extend to the inner hole of the bearing under test, and the connecting part abuts against the inner ring of the bearing under test to apply load.

[0006] The present invention can be further configured such that: the drive assembly includes a servo motor and a pulley, the other end of the drive shaft extends to the bottom of the frame, and a transmission wheel is provided at the other end of both the servo motor and the drive shaft, and the pulley is fitted onto the transmission wheel.

[0007] By further configuring the drive assembly, a servo motor and a pulley are installed, allowing the other end of the drive shaft to extend below the test bench. The pulley forms a transmission connection between the servo motor with a transmission wheel and the other end of the drive shaft, enabling the servo motor to drive the drive shaft to rotate. In turn, the drive drives the mounting base and the outer ring of the bearing under test on the mounting base to rotate.

[0008] The present invention can be further configured such that: one end of the drive shaft is interference-fitted into the center of the mounting base, a retaining edge is provided on the periphery of the mounting base, and a pin hole is provided on the retaining edge and the mounting base near the retaining edge.

[0009] By further configuring the drive shaft so that one end is interference-fitted into the center of the mounting base, the drive shaft can drive the mounting base to rotate. Pin holes are provided at the flange and near the flange of the mounting base, through which pins can be inserted to form a connection between the mounting base and the bearing under test.

[0010] The present invention can be further configured such that: a vertically extending mounting bracket is provided on the platform, the upper end of the mounting bracket is bent and extended to the top of the mounting base to form an extension portion, and the driving component is disposed on the extension portion.

[0011] By further configuring the mounting bracket on the stand, and providing an extension on the mounting bracket that extends above the mounting base for mounting the drive assembly, the drive shaft and connecting part of the drive assembly are aligned with the mounting base.

[0012] The present invention can be further configured such that: the loading component includes a loading motor and a torque sensor, the loading motor is disposed on the extension, the loading shaft is formed by the output end of the loading motor, the loading shaft passes through the extension and is connected to the torque sensor, and the connecting part is connected below the torque sensor.

[0013] With further configuration, a loading motor mounted on the extension section serves as the loading power, which can stably drive the loading shaft to extend and retract. A torque sensor is installed between the loading shaft and the connecting section, which can directly and accurately measure the torque borne by the bearing under test connected to the connecting section, facilitating data collection and analysis. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0015] Figure 2This is a schematic diagram of the structure of the driving component in an embodiment of the present invention. Figure 1 ;

[0016] Figure 3 This is a schematic diagram of the structure of the driving component in an embodiment of the present invention. Figure 2 ;

[0017] Figure 4 This is a schematic diagram of the loading component in an embodiment of the present utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the bearing to be tested in an embodiment of this utility model;

[0019] The components include: a test stand 1; a mounting bracket 11; an extension 12; a drive assembly 2; a drive shaft 21; a servo motor 22; a pulley 23; a transmission wheel 24; a loading assembly 3; a loading shaft 31; a connecting part 32; a loading motor 33; a torque sensor 34; a mounting base 4; a flange 41; a pin hole 42; a bearing to be tested 5; and a test computer 6. Detailed Implementation

[0020] An example of the implementation of this utility model is a robot cross roller bearing torque measuring device. Figure 1-5 As shown: A test stand 1 is provided, on which a drive assembly 2, a loading assembly 3, and a mounting base 4 are mounted. The drive assembly 2 includes a drive shaft 21, one end of which is connected to the lower part of the mounting base 4 and can drive the mounting base 4 to rotate. The mounting base 4 is for mounting the bearing to be tested 5 and can form a positioning connection with the outer ring of the bearing to be tested 5. The loading assembly 3 includes a loading shaft 31 and a connecting part 32. The loading shaft 31 is telescopically oriented, and the connecting part 32 can extend to the inner hole of the bearing to be tested 5 under the drive of the loading shaft 31 to form an abutment fit with its inner ring. In this embodiment, the drive shaft 21 is an air shaft, a sliding bearing shaft that uses air as a lubricant. It utilizes the elastic potential energy of air for support by injecting high-pressure air into the narrow gap between the shaft and the fixed bearing (typically the gap is about 0.01). (millimeters) When the air pressure reaches a certain level, it can push the internal contact surface of the bearing apart, causing the shaft to float and achieve frictionless movement. This allows the shaft to be fixed very precisely, producing only low dynamic eccentricity.

[0021] The drive assembly 2 includes a servo motor 22 and a pulley 23. The other end of the drive shaft 21 extends to the bottom of the stand 1. Both the servo motor 22 and the drive shaft 21 are provided with a transmission wheel 24 at the other end. The pulley 23 is mounted on the transmission wheel 24.

[0022] One end of the drive shaft 21 is interference-fitted into the center of the mounting base 4. A retaining edge 41 is provided on the periphery of the mounting base 4, and a pin hole 42 is provided on the retaining edge 41 and the mounting base 4 near the retaining edge.

[0023] The platform 1 is provided with a vertically extending mounting bracket 11. The upper end of the mounting bracket 11 is bent and extends to the top of the mounting base 4 to form an extension 12. The drive assembly 2 is disposed on the extension 12.

[0024] The loading assembly 3 includes a loading motor 33 and a torque sensor 34. The loading motor 33 is mounted on the extension 12, and the loading shaft 31 is formed by the output end of the loading motor 33. The loading shaft 31 passes through the extension and connects to the torque sensor. The connection part is located below the torque sensor. The test bench 1 is also equipped with a test computer 6 that is connected to the torque sensor 34. The test computer 6 can visually display the magnitude of the torque recorded by the torque sensor, facilitating recording by the operator.

[0025] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.

Claims

1. A robot crossed-roller bearing torque measurement device, characterized by: The utility model relates to a bearing test device, including gantry, be provided with drive assembly, loading assembly and mounting seat on the gantry, drive assembly include drive shaft, one end of drive shaft is connected in the below of mounting seat and can drive mounting seat to rotate with it, the mounting seat is installed on its top for the bearing to be measured and can form the positioning connection with the outer ring of bearing to be measured, loading assembly includes loading shaft and connecting portion, the loading shaft is set up in extension, the connecting portion can be driven to the inner hole of bearing to be measured with the inner ring of bearing to be measured and form the abutted fit under the loading shaft.

2. A robot crossed-roller bearing torque measurement device according to claim 1, characterized in that: The drive assembly includes a servo motor and a belt pulley, the other end of the drive shaft extends to the lower side of the gantry, the servo motor and the other end of the drive shaft are provided with transmission wheels, and the belt pulley is sleeved on the transmission wheels.

3. A robot crossed-roller bearing torque measurement device according to claim 2, wherein: The drive shaft is inserted into the center of the mounting seat with interference, the peripheral side of the mounting seat is provided with a stop edge, and the stop edge and the position close to the stop edge of the mounting seat are provided with pin holes.

4. The robot crossed-roller bearing torque measuring device according to claim 1 or 2 or 3, characterized in that: The gantry is provided with a vertically extending mounting rack, the upper end of the mounting rack is bent and extended to the upper side of the mounting seat to form an extension part, and the drive assembly is arranged on the extension part.

5. A robot crossed-roller bearing torque measurement device according to claim 4, wherein: The loading assembly includes a loading motor and a torque sensor, the loading motor is arranged on the extension part, the loading shaft is composed of the output end of the loading motor, the loading shaft passes through the extension part and is connected with the torque sensor, and the connecting portion is connected below the torque sensor.

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