CN209727464U - Bearing friction torque measuring device - Google Patents

Abstract

The utility model relates to a bearing detection device, in particular discloses a bearing friction torque measurement device. This kind of bearing friction torque measurement device includes a mounting base for installing the test bearing, and a driving device for driving the test bearing to rotate; the mounting base includes a fixing part and a deflection part, and the deflection part and the deflection part The fixed parts are connected by arc-shaped guide rails, and the center line of the arc-shaped guide rails is perpendicular to the rotation center of the test bearing; the installation base is also equipped with a device for driving the deflection part to move relative to the fixed part arc-shaped guide rails, It also has an adjustment mechanism with a locking function; it also includes a detection unit connected with the driving device and used to measure the friction torque. In the bearing friction torque measurement device described above, the installation base has a deflection function, which is used to drive the inner ring of the test bearing to deflect a certain angle relative to the outer ring, and then detect the friction torque of the test bearing at a specific deflection angle.

Description

Bearing friction torque measuring device

technical field

The utility model relates to a bearing moment detection device, in particular to a bearing friction moment measurement device.

Background technique

Bearings are important mechanical standard parts, mainly used to transmit motion and bear loads, and have the advantages of small friction, easy start, simple lubrication and easy replacement. Bearings usually include inner ring, outer ring and rolling elements. During the operation of the bearing, the friction torque between the three parts is an important parameter to evaluate the performance of the bearing, which directly affects the performance of the bearing. Therefore, it is necessary to measure the friction torque during the operation of the bearing.

The Chinese utility model patent with the authorized announcement number CN 201364215Y discloses a measuring device for bearing friction torque under different axial loads and speeds, including a fixed component, an axial loading component, a display component and a measuring component, which can effectively measure the bearing in the The amount of friction torque at different loads and higher speeds. However, this device can only measure the frictional moment of the bearing under axial load. In actual use, some bearings (such as the bearings in the steering system of automobiles) not only bear axial load, but also deflect at a certain angle when the outer ring is relative to the inner ring. At this time, the center line of the outer ring of the bearing is no longer parallel to the center line of the inner ring, and the magnitude and direction of the friction force between the ring and the rolling elements are more complicated, and the existing friction torque measurement device cannot simulate this work. condition. Therefore, it is necessary to use a measuring device similar to the actual working conditions to measure the friction torque of the bearings under such working conditions to make the measurement results more accurate and reliable.

Contents of the invention

The technical problem to be solved by the utility model is to provide a bearing friction torque measuring device, in which the installation base has a deflection function, which drives the inner ring of the test bearing to deflect at a certain angle relative to the outer ring, and then detects that the test bearing is under a specific deflection angle. friction torque.

In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a bearing friction torque measuring device, including a mounting base for mounting the test bearing, and a driving device for driving the test bearing to rotate; the mounting base The seat includes a fixed part and a deflection part, the deflection part and the fixed part are connected by an arc-shaped guide rail, and the center line of the arc-shaped guide rail is perpendicular to the rotation center of the test bearing; There is an adjustment mechanism for driving the deflection part to move relative to the arc-shaped guide rail of the fixed part and has a locking function; it also includes a detection unit connected with the driving device and used for measuring the friction torque.

The center line of the arc-shaped guide rail is perpendicular to the rotation center of the test unit, that is, the deflection center of the deflection part is perpendicular to the rotation center of the test unit. During the test, the adjustment mechanism drives the deflection part to move along the arc-shaped guide rail relative to the fixed part, so that The deflection part is relatively inclined to the center of the test unit, so that the centerlines of the inner ring fixing seat and the outer ring fixing seat are relatively deviated, and the outer ring of the test bearing is deflected by a certain angle relative to the inner ring. In this way, the operating conditions of the test bearing at the deflection angle are simulated to improve the accuracy of friction torque detection

Preferably, the adjustment mechanism includes a worm wheel fixedly connected with the deflection part, the centerline of the worm wheel coincides with the centerline of the arc-shaped guide rail; of the worm. Due to the unidirectional self-locking characteristic of the worm gear transmission structure, the adjustment mechanism can simultaneously position and lock the deflection part on the premise of adjusting the deflection angle of the deflection part to ensure the stability of the deflection angle.

Preferably, a driven plate is provided on the opposite side of the deflection part to the fixed part, the driven plate includes an arcuate surface coaxial with the arcuate guide rail, and the worm wheel includes Worm gear teeth. It is equivalent to setting a part of the worm wheel on the deflection part in the form of an arc plate, which has a simple structure and is convenient to operate.

Preferably, the deflection part or the fixation part is provided with a scale mark for indicating the deflection angle of the deflection part relative to the fixation part. The deflection angle is monitored indirectly through the deflection angle, the structure is simple, and the use is convenient.

Preferably, the deflection part and the fixed part are connected by an arc-shaped cross roller guide.

Preferably, the drive device includes an axial slide rail, and a slide table slidably connected to the axial slide rail, the slide table is arranged opposite to the installation base, and the drive slide rail is provided on the axial slide rail. The first power module that moves along the axial slide rail; the second power module that is connected with the test unit and drives the test bearing to rotate is arranged on the slide table. When the test bearing is installed, the sliding table between the first power modules moves away from the installation base to reserve a space for the test bearing to be installed. After the connection between the test bearing and the installation base is completed, the first power unit drives the slide table to move toward the installation base until it contacts the second power unit, realizing the docking of the test unit and the drive unit.

Preferably, the detection unit includes a torque sensor arranged between the connecting rod and the test bearing or connected in series on the connecting rod.

Description of drawings

Fig. 1 is the structural representation of the bearing friction torque measuring device of the present embodiment;

Fig. 2 is a schematic diagram of the mechanism of the test unit in the bearing friction torque measuring device of the present embodiment;

Fig. 3 is a cross-sectional view of the test unit in the bearing friction torque measuring device of the present embodiment;

Fig. 4 is a side view of the bearing friction torque measuring device of the present embodiment;

Fig. 5 is a schematic diagram of the connection structure between the driving device and the test unit in the bearing friction torque measuring device of the present embodiment;

Fig. 6 is a structural schematic diagram of the mounting base in the bearing friction torque measuring device of this embodiment;

Fig. 7 is a cross-sectional view of the mounting base in the bearing friction torque measuring device of this embodiment;

Fig. 8 is a cross-sectional view of the deflection state of the mounting base in the bearing friction moment measuring device of this embodiment;

Fig. 9 is a cross-sectional view of the deflection part of the bearing friction torque measuring device of this embodiment.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Embodiment one

As shown in Figures 1-3, a bearing friction torque measurement device includes a test unit 2. The test unit 2 includes an inner ring fixing seat 22 and an outer ring fixing seat 23; 22, and the driving device 3 connected to the outer ring fixing seat 23, the driving device 3 drives the outer ring fixing seat 23 and the inner ring fixing seat 22 to rotate relative to each other. The outer ring fixing seat 23 is provided with a mounting groove, and a plurality of dismounting holes 24 passing through the entire outer ring fixing seat 23 are distributed at the bottom of the mounting groove. Since the bearing outer ring and the outer ring fixing seat 23 are usually transition fit or interference fit, it is more convenient to complete the disassembly work by inserting the thimble through the disassembly hole 24 and ejecting the outer ring.

As shown in Figures 1 and 4, the drive device 3 includes an axial slide rail 34, and a slide table 31 slidably connected to the axial slide rail 34, and the slide table 31 is arranged opposite to the installation base 1, The axial slide rail 34 is provided with a first power module 33 that drives the slide table 31 to move along the axial slide rail 34; The second power module 32 that rotates relative to the inner ring fixing seat 22 . When installing the test bearing 4 , the slide table 31 between the first power modules 33 moves away from the installation base 1 , leaving a space for the test bearing 4 to be installed. After the connection between the test bearing 4 and the installation base 1 is completed, the first power unit drives the sliding table 31 to move toward the installation base 1 until it contacts the second power unit to realize the docking between the test unit and the drive unit.

As shown in Figures 2 and 5, the second power module 32 includes a connecting rod 36 connected to the test unit 2, and the corresponding end of the connecting rod 36 and the test unit 2 is provided with a shaft perpendicular to the axis of the connecting rod 36. The transmission pin 361 , the outer ring fixing seat 23 is provided with an insertion slot 21 corresponding to the transmission pin 361 , and the transmission rod and the test unit 2 are detachably connected through the transmission pin 361 and the insertion slot 21 .

As shown in Figures 6-8, the installation base 1 includes a fixed part 12 and a deflection part 11 corresponding to the test unit 2, and the deflection part 11 and the fixed part 12 are connected by an arc-shaped guide rail 15, And the centerline 16 of the arc-shaped guide rail 15 (that is, the direction perpendicular to the paper) is perpendicular to the rotation center of the test unit 2 (the rotation center of the test unit coincides with the rotation center of the second power module driving the connecting rod), that is, the deflection The deflection center of the part 11 is perpendicular to the rotation center of the test unit 2. When testing, the adjustment mechanism 13 drives the deflection part 11 to move along the arc guide rail 15 relative to the fixed part 12, so that the center of the deflection part 11 deviates from the rotation of the test unit 2. center, and then make the inner ring fixing seat 22 and the outer ring fixing seat 23 produce relative deflection, so that the outer ring of the test bearing 4 deflects by a certain angle relative to the inner ring. The arc-shaped guide rail 15 may be connected by an arc-shaped cross roller guide rail.

As shown in Figures 6-8, the installation base 1 is also provided with an adjustment mechanism 13 for driving the deflection part 11 to move along the arc guide rail 15 relative to the fixed part 12. The adjustment mechanism 13 includes a deflection The worm wheel 131 fixedly connected to the part 11 , the center line of the worm wheel 131 coincides with the center line of the arc guide rail 15 . Since the transmission structure of the worm gear 131 and the worm 132 has a one-way self-locking characteristic, the adjustment mechanism 13 can simultaneously position and lock the deflection portion 11 when realizing the deflection angle required by the deflection portion 11, so as to ensure the stability of the deflection angle.

Further, as shown in FIG. 9 , a driven plate 111 is provided on the opposite side of the deflection part 11 to the fixed part 12 , and the driven plate 111 includes an arc-shaped surface 112 coaxial with the arc-shaped guide rail 15 , The worm gear 131 is arranged in the form of worm gear teeth distributed on the arc surface 112 . It is equivalent to setting a part of the worm wheel 131 on the deflection part 11 in the form of an arc plate, and the structure is simple and convenient. The adjustment mechanism 13 further includes a worm 132 that is rotatably connected with the fixed part 12 and meshed with the worm wheel 131 . The deflection part 11 or the fixation part 12 is provided with a scale mark 14 for indicating the deflection angle of the deflection part 11 relative to the fixation part 12 . The deflection angle is monitored indirectly through the deflection angle, the structure is simple, and the use is convenient.

As shown in Figure 4, it also includes a detection unit 35 that is connected to the driving device 3 and is used to measure the friction torque. torque sensor.

When performing the measurement operation, firstly connect the test piece with the inner ring fixing seat 22 and the outer ring fixing seat 23 respectively, and then install the test piece and the test unit 2 as a whole between the driving device 3 and the installation base 1, Complete the preparations before measurement. During the measurement process or before the measurement starts, the deflection part 11 is driven to rotate relative to the fixed part 12 through the worm gear 131 and the worm 132 mechanism, and the deflection angle is applied to the test bearing 4 at the same time to simulate the deflection angle working condition of the test bearing 4, so as to Obtain the friction torque of the test bearing 4 under the action of the deflection angle.

Embodiment two

Compared with Embodiment 1, the difference of this embodiment is that: the outer ring fixing seat 23 is connected with the installation base 1, the inner ring fixing seat 22 is connected with the driving device 3, and the corresponding insertion groove 21 is set in On the inner ring fixing seat 22. That is to say, the installation direction of the test unit is opposite to that of the first embodiment.

In the bearing friction torque measurement device described above, the installation base has a deflection function, which drives the inner ring of the test bearing to deflect by a certain angle relative to the outer ring, and then detects the friction torque of the test bearing at a specific deflection angle.

In a word, the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall include Within the protection scope of the present utility model.

Claims (7)

1. Bearing friction torque measurement device, characterized in that: it includes a mounting base (1) for mounting the test bearing, and a driving device (3) for driving the test bearing to rotate; the mounting base (1) includes The fixed part (12) and the deflection part (11), the deflection part (11) and the fixed part (12) are connected by an arc guide rail (15), and the center line of the arc guide rail (15) is vertical The center of rotation of the test bearing; the installation base (1) is also provided with an adjustment mechanism for driving the deflection part (11) to move relative to the fixed part (12) arc-shaped guide rail (15) and has a locking function (13); also includes a detection unit (35) connected to the driving device (3) and used to measure the friction torque. 2. The bearing friction torque measurement device according to claim 1, characterized in that: the adjustment mechanism (13) includes a worm wheel (131) fixedly connected with the deflection part (11), and the center of the worm wheel (131) The line coincides with the center line of the arc-shaped guide rail (15); the adjustment mechanism (13) also includes a worm (132) that is rotatably connected with the fixed part (12) and meshed with the worm wheel (131). 3. The bearing friction torque measuring device according to claim 2, characterized in that: a driven plate (111) is provided on the opposite side of the deflection part (11) to the fixed part (12), and the driven plate (111) is The plate (111) includes an arc surface (112) coaxial with the arc guide rail (15), and the worm gear (131) includes worm gear teeth distributed on the arc surface (112). 4. The bearing friction torque measuring device according to claim 1, characterized in that: the deflecting part (11) or the fixing part (12) is provided with a scale mark (14). 5. The bearing friction torque measuring device according to claim 1, characterized in that: the deflecting part (11) and the fixing part (12) are connected by arc-shaped cross roller guide rails. 6. The bearing friction torque measurement device according to any one of claims 1-5, characterized in that: the drive device (3) includes an axial slide rail (34), and the axial slide rail (34) ) slidingly connected slide table (31), the slide table (31) is set opposite to the installation base (1), and the axial slide rail (34) is provided with a drive slide table (31) along the axial direction The first power module (33) that slides (34) moves; the second power module (32) that is connected to the test unit (2) and drives the test bearing to rotate is provided on the slide table (31). 7. The bearing friction torque measurement device according to claim 6, characterized in that: the detection unit (35) includes a device arranged between the connecting rod (36) and the test bearing (4) or connected in series between the connecting rod (36) ) on the torque sensor.