A ball screw friction force detection device

Abstract

The utility model discloses a ball screw friction force detection device, comprising a mounting plate one, a mounting plate two, a screw clamping mechanism and a nut positioning mechanism, the nut positioning mechanism is arranged on the mounting plate two, a screw driving mechanism is arranged on the mounting plate one, the screw driving mechanism comprises a motor, a transmission screw and a slider one, the motor is fixed on the mounting plate one, the transmission screw is rotatably mounted on the mounting plate one, the transmission screw is fixedly connected to the driving shaft of the motor, a nut is fixedly arranged at the bottom of the slider one, the nut is threadably matched with the transmission screw, the slider one is horizontally slidably matched with the mounting plate one, the screw clamping mechanism is slidably mounted on the slider one, a pressure sensor support is fixedly mounted on the slider one, a pressure sensor is fixed between the pressure sensor support and the screw clamping mechanism; the utility model has the advantages of simple device structure, convenient installation of the test screw and the nut, improved detection efficiency, the pressure sensor is not directly connected to the motor, and the data obtained by the detection is more accurate.

Description

Technical Field

[0001] The utility model relates to a performance detection device for a ball screw, in particular to a friction force detection device for a ball screw. Background Art

[0002] Ball screws are the most commonly used transmission elements in tool machinery and precision machinery. Their main function is to convert rotational motion into linear motion, or torque into axial repetitive force. They are also characterized by high precision, reversibility and high efficiency. Ball screws have very small mechanical friction and are widely used in various industrial equipment and precision instruments. The size of the mechanical friction of ball screws is related to whether the processing and assembly accuracy of the screw and nut meet the design requirements. It can also be used to determine whether wear affects the repeat positioning accuracy and service life after a period of use. The installation and clamping structure of the existing ball screw friction detection device is relatively complex, and the pressure detection device is directly connected to the motor, resulting in a large error. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a ball screw friction force detection device, which has a simple device structure, and the screw and nut to be tested are convenient to install on the device, and the pressure sensor is not directly connected to the motor, so that the measured data is more accurate.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A ball screw friction force detection device comprises a mounting plate 1, a mounting plate 2, a screw clamping mechanism and a nut positioning mechanism, wherein the nut positioning mechanism is arranged on the mounting plate 2, and a screw driving mechanism is arranged on the mounting plate 1, and the screw driving mechanism comprises a motor, a transmission screw and a slider 1, wherein the motor is fixed on the mounting plate 1, and the transmission screw is rotatably mounted on the mounting plate 1, and the transmission screw is fixedly connected to the driving shaft of the motor, and a nut is fixedly arranged at the bottom of the slider 1, and the nut is threadably matched with the transmission screw, and the slider 1 is horizontally slidably matched with the mounting plate 1, and the screw clamping mechanism is slidably mounted on the slider 1, and a pressure sensor support is fixedly mounted on the slider 1, and a pressure sensor is fixed between the pressure sensor support and the screw clamping mechanism.

[0006] Preferably, the screw clamping mechanism includes a hydraulic chuck and a hydraulic chuck mounting seat, the hydraulic chuck is used to clamp the screw to be tested, the hydraulic chuck is fixed on the hydraulic chuck mounting seat, the pressure sensor is fixed to the hydraulic chuck mounting seat, a slide rail 1 is fixedly provided on the slider 1, and the bottom of the hydraulic chuck mounting seat is horizontally slidably matched with the slide rail 1.

[0007] Preferably, a slide rail three is fixedly provided on the mounting plate one, and the slider one is horizontally slidably matched with the slide rail three.

[0008] Preferably, a reducer is provided on the driving shaft of the motor, and the output shaft of the reducer is coaxially fixed with the driving screw.

[0009] Preferably, the nut positioning mechanism includes a cylinder, a nut positioning piece, a nut mounting seat and a slider 2, the nut mounting seat is used to install the nut on the lead screw to be tested, the cylinder is fixedly mounted on the mounting plate 2, the bottom of the slider 2 is fixed to the piston rod of the cylinder, the mounting plate 2 is provided with a horizontally sliding slider 3, the slider 3 is fixedly provided with a slide rail 2, the slider 2 is horizontally slidably matched with the slide rail 2, the nut positioning piece is fixedly mounted on the slider 2, the nut positioning piece is fixedly provided with a protrusion for abutting against the end face of the nut, and the nut mounting seat is fixed on the slider 3.

[0010] Preferably, a slide rail four is fixedly provided on the mounting plate two, the slider three is horizontally slidably matched with the slide rail four, and a fixing mechanism is provided between the slider three and the slide rail four.

[0011] Preferably, the fixing mechanism includes a fixing screw, a fixing mounting hole 1 and a fixing mounting hole 2, the fixing mounting hole 1 is arranged on the slider 3, the fixing mounting hole 2 is arranged on the slide rail 4, the fixing screw passes through the fixing mounting hole 1, and the fixing screw is threadably matched with the fixing mounting hole 2, so that the slider 3 is fixed on the slide rail 4.

[0012] Compared with the prior art, the advantages of the utility model are that the device has a simple structure and is easy to operate, and the installation of the lead screw and nut to be tested on the device is relatively convenient, which can improve the detection efficiency. The pressure sensor is not directly connected to the motor, which can reduce the error caused by the operation of the motor, thereby making the data obtained by the detection more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0014] Among them: 1. Motor; 2. Reducer; 3. Drive screw; 4. Pressure sensor support; 5. Pressure sensor; 6. Slider 1; 7. Hydraulic chuck; 8. Screw to be tested; 9. Nut mounting seat; 10. Nut; 11. Nut positioning piece; 12. Slider 2; 13. Cylinder; 14. Slider 3; 15. Mounting plate 2; 16. Hydraulic chuck mounting seat; 17. Slide rail 1; 18. Slide rail 2; 19. Slide rail 3; 20. Slide rail 4; 21. Mounting plate 1; 22. Raised portion; 23. Fixed mounting hole 1; 24. Fixed mounting hole 2. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0016] As shown in the figure, a ball screw friction force detection device includes a mounting plate 1 21, a mounting plate 2 15, a screw clamping mechanism and a nut positioning mechanism, the nut positioning mechanism is arranged on the mounting plate 2 15, the nut positioning mechanism includes a cylinder 13, a nut positioning member 11, a nut mounting seat 9 and a slider 2 12, the nut mounting seat 9 is used to install the nut 10 on the screw 8 to be tested, the cylinder 13 is fixedly mounted on the mounting plate 2 15, the bottom of the slider 2 12 is fixed to the piston rod of the cylinder 13, the mounting plate 2 15 is provided with a horizontally sliding slider 3 14, the slider 3 14 is fixedly provided with a slide rail 2 18, the slider 2 12 and the slide rail 2 18 horizontal sliding fit, a slide rail 4 20 is fixedly arranged on the mounting plate 2 15, the slider 3 14 is horizontally slidably matched with the slide rail 4 20, and a fixing mechanism is arranged between the slider 3 14 and the slide rail 4 20, the fixing mechanism includes a fixing screw, a fixing mounting hole 1 23 and a fixing mounting hole 24, the fixing mounting hole 1 23 is arranged on the slider 3 14, the fixing mounting hole 24 is arranged on the slide rail 4 20, the fixing screw passes through the fixing mounting hole 1 23, the fixing screw is threadedly matched with the fixing mounting hole 24, so that the slider 3 14 is fixed on the slide rail 4 20, the nut positioning piece 11 is fixedly installed on the slider 2 12, the nut positioning piece A protrusion 22 for abutting against the end face of the nut 10 is fixedly provided on the nut 11, the nut mounting seat 9 is fixed on the slider 3 14, a screw drive mechanism is provided on the mounting plate 1 21, and the screw drive mechanism includes a motor 1, a transmission screw 3 and a slider 6, the motor 1 is fixed on the mounting plate 1 21, the transmission screw 3 is rotatably mounted on the mounting plate 1 21, a reducer 2 is provided on the driving shaft of the motor 1, and the output shaft of the reducer 2 is coaxially fixed with the transmission screw 3, a nut is fixedly provided at the bottom of the slider 6, the nut is threadedly matched with the transmission screw 3, the slider 6 is horizontally slidably matched with the mounting plate 1 21, and a fixed device is provided on the mounting plate 1 21 A slide rail 3 19 is provided, a slider 6 is in horizontal sliding cooperation with the slide rail 3 19, a screw clamping mechanism is slidably mounted on the slider 6, the screw clamping mechanism comprises a hydraulic chuck 7 and a hydraulic chuck mounting seat 16, the hydraulic chuck 7 is used to clamp the screw 8 to be tested, the hydraulic chuck 7 is fixed on the hydraulic chuck mounting seat 16, the pressure sensor 5 is fixed to the hydraulic chuck mounting seat 16, a slide rail 17 is fixedly provided on the slider 6, the bottom of the hydraulic chuck mounting seat 16 is in horizontal sliding cooperation with the slide rail 17, a pressure sensor support 4 is fixedly mounted on the slider 6, and a pressure sensor 5 is fixed between the pressure sensor support 4 and the screw clamping mechanism.

[0017] When the ball screw friction force detection device of the utility model is used, firstly a standard lead screw with the same specification as the lead screw 8 to be tested is passed through the nut, and the nut on the standard lead screw is placed in the nut mounting seat 9, and the slider 3 14 is moved horizontally to make one end of the standard lead screw close to the hydraulic chuck 7, and the claws on the hydraulic chuck 7 clamp one end of the standard lead screw, and then the slider 3 14 is fixed to the slide rail 4 20, and then the cylinder 13 is started, and the piston rod of the cylinder 13 pushes the slider 2 12 to slide and drives the nut positioning piece 11 to move in the direction close to the nut, until the protrusion 22 on the nut positioning piece 11 abuts against the end face of the nut, so that the nut is positioned on the nut mounting seat 9, and then the motor 1 is started, and the motor 1 reduces the speed through the connected reducer 2, and the output of the reducer 2 The transmission screw 3 fixedly connected to the output shaft rotates and drives the slider 6 to move in the direction close to the nut. The movement of the slider 6 causes the standard screw to move in the same direction. Since the standard screw and the nut thread cooperate, the standard screw and the nut rotate. In this process, friction is generated between the standard screw and the nut. The reaction force of the friction will act on the end of the standard screw and then be transmitted to the pressure sensor 5 through the connected hydraulic chuck 7 and the hydraulic chuck mounting seat 16. The value displayed on the pressure sensor 5 is recorded, and then the standard screw is removed, and the screw 8 and the nut 10 to be tested are placed on the device, and the above steps are repeated. The value displayed on the pressure sensor 5 is recorded and compared with the value collected by the standard screw and the nut for detecting the friction of the ball screw.

[0018] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A ball screw friction force detection device, comprising a mounting plate 1 (21), a mounting plate 2 (15), a screw clamping mechanism and a nut positioning mechanism, wherein the nut positioning mechanism is arranged on the mounting plate 2 (15), and a screw driving mechanism is arranged on the mounting plate 1 (21), wherein the screw driving mechanism comprises a motor (1), a transmission screw (3) and a slider 1 (6), wherein the motor (1) is fixed on the mounting plate 1 (21), and the transmission screw (3) is rotatably mounted on the mounting plate 1 (21), wherein the transmission screw (3) is fixedly connected to the driving shaft of the motor (1), and a nut is fixedly arranged at the bottom of the slider 1 (6), wherein the nut is threadably matched with the transmission screw (3), and the slider 1 (6) is horizontally slidably matched with the mounting plate 1 (21), characterized in that: The screw clamping mechanism is slidably mounted on the slider one (6), a pressure sensor support (4) is fixedly mounted on the slider one (6), and a pressure sensor (5) is fixed between the pressure sensor support (4) and the screw clamping mechanism.

2. A ball screw friction force detection device as claimed in claim 1, characterized in that: The screw clamping mechanism comprises a hydraulic chuck (7) and a hydraulic chuck mounting seat (16); the hydraulic chuck (7) is used to clamp the screw (8) to be tested; the hydraulic chuck (7) is fixed on the hydraulic chuck mounting seat (16); the pressure sensor (5) is fixed to the hydraulic chuck mounting seat (16); a slide rail (17) is fixedly provided on the slider (6); and the bottom of the hydraulic chuck mounting seat (16) is horizontally slidably matched with the slide rail (17).

3. A ball screw friction force detection device as claimed in claim 1, characterized in that: The mounting plate one (21) is fixedly provided with a slide rail three (19), and the slide block one (6) is horizontally slidably matched with the slide rail three (19).

4. A ball screw friction force detection device as claimed in claim 1, characterized in that: A reducer (2) is arranged on the driving shaft of the motor (1), and the output shaft of the reducer (2) is coaxially fixed with the driving screw (3).

5. A ball screw friction force detection device as claimed in claim 1, characterized in that: The nut positioning mechanism comprises a cylinder (13), a nut positioning member (11), a nut mounting seat (9) and a second slider (12); the nut mounting seat (9) is used to mount the nut (10) on the lead screw (8) to be tested; the cylinder (13) is fixedly mounted on the second mounting plate (15); the bottom of the second slider (12) is fixed to the piston rod of the cylinder (13); the second mounting plate (15) is provided with a third slider (14) for horizontal sliding; the third slider (14) is fixedly provided with a second slide rail (18); the second slider (12) and the second slide rail (18) are horizontally slidably matched; the nut positioning member (11) is fixedly mounted on the second slider (12); the nut positioning member (11) is fixedly provided with a protrusion (22) for abutting against the end face of the nut (10); and the nut mounting seat (9) is fixed on the third slider (14).

6. A ball screw friction force detection device as claimed in claim 5, characterized in that: A slide rail four (20) is fixedly arranged on the mounting plate two (15), the slider three (14) is horizontally slidably matched with the slide rail four (20), and a fixing mechanism is arranged between the slider three (14) and the slide rail four (20).

7. A ball screw friction force detection device as claimed in claim 6, characterized in that: The fixing mechanism comprises a fixing screw, a fixing mounting hole 1 (23) and a fixing mounting hole 2 (24); the fixing mounting hole 1 (23) is arranged on the sliding block 3 (14); the fixing mounting hole 2 (24) is arranged on the sliding rail 4 (20); the fixing screw passes through the fixing mounting hole 1 (23); the fixing screw is threadably matched with the fixing mounting hole 2 (24), so that the sliding block 3 (14) is fixed on the sliding rail 4 (20).

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