Micro dynamic torque testing device

Abstract

The invention discloses a micro dynamic torque testing device, which relates to the technical field of torque measurement and comprises a rack, a driving piece, a first non-contact torque transmission piece, a second non-contact torque transmission piece, a torque sensor, a third non-contact torque transmission piece, a fourth non-contact torque transmission piece and a load piece, the first non-contact torque transmission piece is fixedly connected with the driving piece, and the second non-contact torque transmission piece is in non-contact connection with the first non-contact torque transmission piece and receives power torque transmitted by the driving piece; the fourth non-contact torque transmission piece is fixedly connected with the load piece to receive the resistance torque of the load piece, and the fourth non-contact torque transmission piece is used for being in non-contact connection with the third non-contact torque transmission piece to transmit the resistance torque to the third non-contact torque transmission piece. The input end and the output end of the torque sensor are connected with the second non-contact torque transmission piece and the third non-contact torque transmission piece respectively, the structure is simple, and the torque measurement precision and reliability are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of torque measurement, in particular to a small dynamic torque testing device. Background Art

[0002] In the existing dynamic torque testing technology, a coupling is usually used to connect the torque sensor to the drive end and the load for torque measurement. However, when measuring tiny dynamic torque, this method places extremely high requirements on the processing and installation accuracy of the torque test bench, and places high requirements on the accuracy and performance of the couplings on both sides of the highly sensitive tiny torque sensor, such as having good error adjustment ability and vibration reduction ability. However, no matter how they are matched, extremely high requirements are placed on the installation errors such as eccentricity, deflection and axial deviation of the shaft center, and the test accuracy will also change due to motion vibration, thermal expansion, bearing wear, etc., resulting in high maintenance and repair costs for the device, low service life, and poor reliability and stability. Therefore, when solving the problem of tiny dynamic torque measurement, the existing inter-axis connection technology using contact couplings has problems such as low measurement accuracy, large data fluctuations, and the tiny torque signal is seriously interfered with, resulting in the inability to measure or inaccurate measurement. Summary of the invention

[0003] The purpose of the present invention is to provide a small dynamic torque testing device to solve the problems existing in the above-mentioned prior art, with a simple structure and effectively improve the torque measurement accuracy and reliability.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a micro dynamic torque testing device, comprising: a bench, a driving member, a first non-contact torque transmission member, a second non-contact torque transmission member, a torque sensor, a third non-contact torque transmission member, a fourth non-contact torque transmission member and a load member, wherein the bench is used to be fixed on a vibration isolation base; the driving member is fixedly connected to the bench; the load member is arranged at one end of the bench away from the driving member; the first non-contact torque transmission member is used to be fixedly connected to the output end of the driving member; the second non-contact torque transmission member is fixedly connected to the input end of the torque sensor, and the second non-contact torque transmission member is non-contactly connected to the first non-contact torque transmission member and rotates synchronously with the first non-contact torque transmission member to receive the power torque transmitted by the first non-contact torque transmission member; the fourth non-contact torque transmission member is fixedly connected to the input end of the load member to receive the resistance torque of the load member, and the fourth non-contact torque transmission member is used to be non-contactly connected to the third non-contact torque transmission member and rotates synchronously with the third non-contact torque transmission member to transmit the resistance torque to the third non-contact torque transmission member. The input end and output end of the torque sensor are connected to the second non-contact torque transmission member and the third non-contact torque transmission member respectively.

[0006] Preferably, the first non-contact torque transmission component is a first magnetic component, the second non-contact torque transmission component is a second magnetic component, and the first magnetic component is magnetically coupled to the second magnetic component.

[0007] Preferably, the third non-contact torque transmission component is a third magnetic component, the fourth non-contact torque transmission component is a fourth magnetic component, and the third magnetic component is magnetically coupled to the fourth magnetic component.

[0008] Preferably, it also includes a first bearing and a first bearing seat, the first bearing seat is fixedly connected to the stand, the first bearing is installed in the first bearing seat, the output shaft of the driving member passes through the middle of the first bearing and is fixedly connected to the inner ring of the first bearing, and the output shaft of the driving member passes through one end of the first bearing and is coaxially fixedly connected to the first magnetic member.

[0009] Preferably, it also includes a second bearing and a second bearing seat, the second bearing seat is fixedly connected to the stand, the second bearing is installed in the second bearing seat, the input shaft of the load member passes through the middle of the second bearing and is fixedly connected to the inner ring of the second bearing, and the input shaft of the load member passes through one end of the second bearing and is coaxially fixedly connected to the fourth magnetic member.

[0010] Preferably, the measuring range of the torque sensor is 500 N·mm, and the accuracy of the torque sensor is 0.1% to 0.01%.

[0011] Preferably, the driving member is a driving motor.

[0012] Compared with the prior art, the present invention has achieved the following technical effects:

[0013] The present invention provides a micro dynamic torque test device, which uses a non-contact connection between a driving part and a torque sensor for torque transmission, and a non-contact torque transmission between a torque sensor and a load part. Compared with the connection method through a contact coupling, only torque is transmitted, but bending moment is not transmitted, and the device has the ability to isolate the bending vibration and torsional vibration of the driving side and the load side to avoid interference with the micro dynamic torque signal. This non-contact shaft connection method effectively solves the problems of high installation accuracy requirements, high maintenance and repair costs, low service life, strong environmental sensitivity, poor reliability and stability of the micro dynamic torque test device, and helps to improve the measurement accuracy of micro dynamic torque, and eliminate the interference of system vibration signals such as bending vibration and torsional vibration, as well as electrical, thermal and other energy transmission on micro torque signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of the structure of a small dynamic torque testing device provided by the present invention;

[0016] Figure 2 A front view of the micro dynamic torque testing device provided by the present invention;

[0017] Figure 3 A top view of a micro dynamic torque testing device provided by the present invention;

[0018] In the figure: 1, stand; 2, driving member; 3, first bearing; 4, first magnetic member; 5, second magnetic member; 6, torque sensor; 7, third magnetic member; 8, fourth magnetic member; 9, second bearing; 10, load member. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The purpose of the present invention is to provide a small dynamic torque testing device to solve the problems existing in the above-mentioned prior art, with a simple structure and effectively improving the torque measurement accuracy.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The present invention provides a small dynamic torque testing device, such as Figure 1-3As shown, it includes: a stand 1, a driving member 2, a first non-contact torque transmission member, a second non-contact torque transmission member, a torque sensor 6, a third non-contact torque transmission member, a fourth non-contact torque transmission member and a load member 10, the stand 1 is used to be fixed on a vibration isolation base; the driving member 2 is fixedly connected to the stand 1; the first non-contact torque transmission member is used to be fixedly connected to the output end of the driving member 2; the second non-contact torque transmission member is fixedly connected to the input end of the torque sensor 6, and the second non-contact torque transmission member is non-contactly connected to the first non-contact torque transmission member and rotates synchronously with the first non-contact torque transmission member to receive the power torque transmitted by the first non-contact torque transmission member; the fourth non-contact torque transmission member is fixedly connected to the input end of the load member 10 to receive the resistance torque of the load member 10, and the fourth non-contact torque transmission member is used to be fixedly connected to the output end of the driving member 2; the second non-contact torque transmission member is fixedly connected to the input end of the torque sensor 6, and the second non-contact torque transmission member is non-contactly connected to the first non-contact torque transmission member and rotates synchronously with the first non-contact torque transmission member to receive the power torque transmitted by the first non-contact torque transmission member The torque sensor is non-contactly connected to the third non-contact torque transmission member and rotates synchronously with the third non-contact torque transmission member to transmit the resistance torque to the third non-contact torque transmission member. The input end of the torque sensor is used to receive the power torque of the driving side, and the output end of the torque sensor is used to receive the resistance torque of the load side. The input end and the output end of the torque sensor are respectively connected to the second non-contact torque transmission member and the third non-contact torque transmission member. The power torque is transmitted between the driving member 2 and the torque sensor 6 using a non-contact connection. The resistance torque is transmitted between the torque sensor 6 and the load member 10 through a non-contact method. Compared with the connection through a contact coupling, the high installation accuracy requirements are effectively reduced, the axial precision alignment requirements are effectively reduced, the vibration transmission is effectively eliminated, and the torque measurement accuracy is effectively improved.

[0023] In a preferred embodiment, the first non-contact torque transmission component is the first magnetic component 4, and the second non-contact torque transmission component is the second magnetic component 5. The first magnetic component 4 and the second magnetic component 5 are magnetically coupled and connected. The magnetic coupling connection method is adopted to realize non-contact torque transmission, avoid the contact wear and precision loss of traditional couplings, and improve the stability and precision of torque transmission.

[0024] In a preferred embodiment, the third non-contact torque transmission component is the third magnetic component 7, and the fourth non-contact torque transmission component is the fourth magnetic component 8. The third magnetic component 7 and the fourth magnetic component 8 are magnetically coupled. The same magnetic coupling connection ensures the high efficiency and stability of the torque in the subsequent transmission process, further improving the reliability of the entire device.

[0025] In a preferred embodiment, the micro dynamic torque testing device also includes a first bearing 3 and a first bearing 3 seat, the first bearing 3 seat is fixedly connected to the test stand 1, the first bearing 3 is installed in the first bearing 3 seat, the output shaft of the driving member 2 passes through the middle of the first bearing 3 and is fixedly connected to the inner ring of the first bearing 3, the output shaft of the driving member 2 passes through one end of the first bearing 3 and is coaxially fixedly connected to the first magnetic member 4, the setting of the first bearing 3 and the first bearing 3 seat reduces the friction and wear of the output shaft of the driving member 2, improves the operating efficiency and life of the driving member 2, and at the same time ensures the coaxiality of the output shaft of the driving member 2 and the first magnetic member 4, thereby ensuring the accurate transmission of torque.

[0026] In a preferred embodiment, the micro dynamic torque testing device also includes a second bearing 9 and a second bearing 9 seat, the second bearing 9 seat is fixedly connected to the test bench 1, the second bearing 9 is installed in the second bearing 9 seat, the input shaft of the load member 10 passes through the middle of the second bearing 9 and is fixedly connected to the inner ring of the second bearing 9, the input shaft of the load member 10 passes through one end of the second bearing 9 and is coaxially fixedly connected to the fourth magnetic member 8, similar to the first bearing 3 and the first bearing 3 seat, the second bearing 9 and the second bearing 9 seat reduce the friction and wear of the input shaft of the load member 10, improve the operating efficiency and life of the load member 10, and ensure the coaxiality of the input shaft of the load member 10 and the fourth magnetic member 8, thereby ensuring the accurate transmission of torque.

[0027] In a preferred embodiment, the measuring range of the torque sensor 6 is 500 N·mm, and the accuracy of the torque sensor 6 is 0.1% to 0.01%. The specific parameters of the torque sensor 6 are clarified so that it can meet the high-precision measurement requirements for torque within a certain range, providing a strong guarantee for the accurate testing of small dynamic torque.

[0028] In a preferred embodiment, the driving member 2 is a driving motor. Using the driving motor as the driving member 2 provides a stable and reliable power source, which facilitates precise control of the test process.

[0029] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A small dynamic torque testing device, characterized in that: include: A stand, the stand being used to be fixed on a vibration isolation base; A driving member, wherein the driving member is fixedly connected to the stand; A load member, the load member being disposed on an end of the frame away from the driving member; Torque sensor, a first non-contact torque transmission member, the first non-contact torque transmission member being used for being fixedly connected to an output end of the driving member; a second non-contact torque transmission member, the second non-contact torque transmission member being fixedly connected to the input end of the torque sensor, and the second non-contact torque transmission member being non-contactly connected to the first non-contact torque transmission member and rotating synchronously with the first non-contact torque transmission member to receive the power torque transmitted by the first non-contact torque transmission member; a third non-contact torque transmission member, the third non-contact torque transmission member being fixedly connected to an output end of the torque sensor, and A fourth non-contact torque transmission member, wherein the fourth non-contact torque transmission member is fixedly connected to the input end of the load member to receive the resistance torque of the load member, and the fourth non-contact torque transmission member is used to be non-contactly connected to the third non-contact torque transmission member and to rotate synchronously with the third non-contact torque transmission member to transmit the resistance torque to the third non-contact torque transmission member.

2. The micro dynamic torque testing device according to claim 1, characterized in that: The first non-contact torque transmission component is a first magnetic component, the second non-contact torque transmission component is a second magnetic component, and the first magnetic component is magnetically coupled to the second magnetic component.

3. The micro dynamic torque testing device according to claim 2, characterized in that: The third non-contact torque transmission component is a third magnetic component, the fourth non-contact torque transmission component is a fourth magnetic component, and the third magnetic component is magnetically coupled to the fourth magnetic component.

4. The micro dynamic torque testing device according to claim 3, characterized in that: It also includes a first bearing and a first bearing seat, the first bearing seat is fixedly connected to the stand, the first bearing is installed in the first bearing seat, the output shaft of the driving member passes through the middle of the first bearing and is fixedly connected to the inner ring of the first bearing, and the output shaft of the driving member passes through one end of the first bearing and is coaxially fixedly connected to the first magnetic member.

5. The micro dynamic torque testing device according to claim 4, characterized in that: It also includes a second bearing and a second bearing seat, the second bearing seat is fixedly connected to the stand, the second bearing is installed in the second bearing seat, the input shaft of the load member passes through the middle of the second bearing and is fixedly connected to the inner ring of the second bearing, and the input shaft of the load member passes through one end of the second bearing and is coaxially fixedly connected to the fourth magnetic member.

6. The micro dynamic torque testing device according to claim 5, characterized in that: The measuring range of the torque sensor is 500 N·mm, and the accuracy of the torque sensor is 0.1% to 0.01%.

7. The micro dynamic torque testing device according to claim 1, characterized in that: The driving member is a driving motor.

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