Hub coaxiality measuring device

Abstract

A wheel hub coaxiality measuring device comprises a centering mechanism used for positioning an inner hole of a wheel hub, an adjusting mechanism connected with the centering mechanism, a stepped shaft connected with the adjusting mechanism, a measuring mechanism connected with the side portion of the stepped shaft, and a pressing mechanism connected with the measuring mechanism and the stepped shaft, and the adjusting mechanism is used for adjusting the working range of the centering mechanism. The measuring mechanism is used for measuring the coaxiality of the hub, and the pressing mechanism is used for limiting the measuring mechanism. The wheel hub coaxiality measuring device provided by the utility model can detect wheel hub inner holes with different hole diameters, realizes the detection of the wheel hub coaxiality, improves the universality of the device, saves the time for replacing a detection tool, and improves the detection efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheel hub measurement, and in particular relates to a wheel hub coaxiality measuring device. Background Art

[0002] The automobile wheel hub is a key component that affects whether the vehicle can travel safely at high speed. If the roundness and coaxiality of the automobile wheel hub are not accurate enough, radial and axial runout will occur during the vehicle's driving process, exerting periodic impacts on the front and rear axles of the vehicle, causing the wheels to jump up and down and sway left and right, thus seriously affecting the dynamic and static characteristics of the vehicle. Therefore, the coaxiality of the automobile wheel hub is an important indicator of wheel hub processing. It is closely related to the vehicle's driving system, so the detection of wheel hub coaxiality is particularly important.

[0003] The existing method for measuring the coaxiality of the wheel hub is usually to use a three-dimensional measuring machine to measure the wheel hub, but this measurement is time-consuming and the measurement process is inefficient. The use of special measuring fixtures requires different special fixtures to be designed according to different wheel hub diameters, which makes the special measuring fixture less versatile and increases the cost of detection. In addition, replacing the fixture will take up a certain amount of extra time, reducing the detection efficiency. Therefore, a coaxiality detection device that can detect multiple wheel hubs with different inner hole diameters is needed. The utility model solves this technical problem. Utility Model Content

[0004] The utility model provides a wheel hub coaxiality measuring device, which can detect the inner holes of wheel hubs with different apertures, realizes the detection of the wheel hub coaxiality, improves the versatility of the device, saves the time of replacing the inspection tool, and improves the detection efficiency.

[0005] A wheel hub coaxiality measuring device comprises a centering mechanism for positioning the inner hole of the wheel hub, an adjusting mechanism connected to the centering mechanism, a stepped shaft connected to the adjusting mechanism, a measuring mechanism connected to the side of the stepped shaft, and a clamping mechanism connected to the measuring mechanism and the stepped shaft, wherein the adjusting mechanism is used to adjust the working range of the centering mechanism, the measuring mechanism is used to measure the coaxiality of the wheel hub, and the clamping mechanism is used to limit the measuring mechanism.

[0006] Furthermore, the centering mechanism includes an inner support frame, a plurality of inner support shafts slidably connected to the inner support frame, one end of the inner support shaft is connected to the adjustment mechanism, and the other end rests on the inner wall of the inner hole of the wheel hub, and a spring is provided on the outer side of the inner support shaft, one end of the spring is connected to the inner support shaft, and the other end is connected to the inner support frame.

[0007] Furthermore, the measuring mechanism includes a tapered shaft whose side rests against the inner support head, an adjusting nut connected to the end of the tapered shaft, the stepped shaft passes through the center of the tapered shaft and the adjusting nut, the adjusting nut and the stepped shaft are connected by threads, and the adjusting nut and the tapered shaft are rotatably connected to the inner support frame.

[0008] Furthermore, the measuring mechanism includes a cantilever having one end rotatably connected to the outer side of the stepped shaft, and a dial indicator connected to the other end of the cantilever. The dial indicator passes through the cantilever, and the end thereof abuts against the outer wall of the inner hole of the wheel hub.

[0009] Furthermore, the clamping mechanism includes a second spring sleeved on the outside of the stepped shaft, and two clamping spacers connected to both ends of the second spring, one of the clamping spacers fits with the end of the cantilever, and the other fits with the end of the clamping nut, the stepped shaft passes through the clamping spacer and the clamping nut, and the clamping nut and the stepped shaft are connected by threads.

[0010] The technical effects of the utility model are as follows:

[0011] (1) The device drives the change of the working range of the centering mechanism through the adjustment mechanism, specifically, drives the tapered shaft to rise and fall by adjusting the nut, so that the tapered shaft drives the inner support shaft to slide on the inner support frame, so that the inner support shaft can be against the inner wall of the inner hole of the wheel hub with different apertures, thereby realizing the change of the working range, so that it can cooperate with the measuring mechanism to realize the coaxiality detection of the wheel hub with different apertures, thereby improving the versatility of the device, saving the time of replacing the inspection tool, and improving the detection efficiency;

[0012] (2) The end of the dial indicator is against the outer wall of the inner hole of the wheel hub. After the centering mechanism is centered, the cantilever can be swung with the stepped shaft as the rotation axis to drive the dial indicator to move, and the display of the dial indicator can be observed, thereby realizing the measurement of the coaxiality of the wheel hub. The operation is simple and the detection efficiency is further improved.

[0013] (3) In the clamping mechanism, the pressure of the clamping spacer on the end of the cantilever can be adjusted by adjusting the clamping nut, so as to limit the position of the cantilever and prevent the cantilever from shaking during the swing measurement, thereby affecting the accuracy of the data measurement;

[0014] (4) The device is easy to use. Compared with three-coordinate measurement, the measurement process of the device is more efficient. Compared with the traditional special gauge in the form of a ruler, the device can adapt to the changes in size within a certain range, and can meet the needs of larger or smaller size changes by replacing some accessories, thereby improving versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a cross-sectional view of the utility model.

[0017] Figure 3 It is a schematic diagram of the connection between the utility model and the wheel hub.

[0018] Among them, the figure markings are: 1. dial indicator; 2. cantilever; 3. clamping nut; 4. clamping spacer; 5. spring two; 6. adjusting nut; 7. inner support frame; 8. inner support shaft; 9. spring one; 10. stepped shaft; 11. tapered shaft; 12. inner hole of wheel hub. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments and drawings.

[0020] See also Figure 1-Figure 3 A wheel hub coaxiality measuring device includes a centering mechanism for positioning an inner hole 12 of a wheel hub, an adjusting mechanism connected to the centering mechanism, a stepped shaft 10 connected to the adjusting mechanism, a measuring mechanism connected to a side of the stepped shaft 10, and a clamping mechanism connected to the measuring mechanism and the stepped shaft 10. The adjusting mechanism is used to adjust the working range of the centering mechanism, the measuring mechanism is used to measure the coaxiality of the wheel hub, and the clamping mechanism is used to limit the measuring mechanism.

[0021] Furthermore, the centering mechanism includes an inner support frame 7, a plurality of inner support shafts 8 slidably connected to the inner support frame 7, one end of the inner support shaft 8 is connected to the adjustment mechanism, and the other end is against the inner wall of the inner hole 12 of the wheel hub, and a spring 9 is sleeved on the outer side of the inner support shaft 8, one end of the spring 9 is connected to the inner support shaft 8, and the other end is connected to the inner support frame 7. The inner support shaft 8 in this embodiment passes through the inner support frame 7 and can slide on the inner support frame 7, and the movement of the inner support shaft 8 can be driven by the compression and contraction of the spring 9. The two ends of the inner support shaft 8 in this embodiment are spherical, one end of the large ball head is tangent to the tapered shaft 11, and one end of the small ball head is tangent to the inner wall of the inner hole 12 of the wheel hub, and three tapered shafts 11 are provided in this embodiment.

[0022] Further, the measuring mechanism includes a tapered shaft 11 whose side rests against the inner support head, an adjusting nut 6 connected to the end of the tapered shaft 11, a stepped shaft 10 passing through the center of the tapered shaft 11 and the adjusting nut 6, the adjusting nut 6 and the stepped shaft 10 are connected by threads, and the adjusting nut 6 and the tapered shaft 11 are rotatably connected to the inner support frame 7. In this embodiment, there is a certain gap between the tapered shaft 11 and the stepped shaft 10, and the tapered shaft 11 can rotate freely around the stepped shaft 10.

[0023] Furthermore, the measuring mechanism includes a cantilever 2 rotatably connected to the outside of the stepped shaft 10 at one end, and a dial indicator 1 connected to the other end of the cantilever 2. The dial indicator 1 passes through the cantilever 2, and the end of the dial indicator 1 abuts against the outer wall of the inner hole 12 of the wheel hub. The end of the dial indicator 1 in this embodiment passes through the cantilever 2 and can move on the cantilever 2, which is convenient for measuring wheels of different sizes. The cantilever 2 is smoothly connected to the stepped shaft 10, and the cantilever 2 can rotate freely around the stepped shaft 10. The stepped shaft 10 in this embodiment is in the shape of a ladder, which can keep the measuring mechanism stable, that is, keep the end of the cantilever 2 stable, and prevent the cantilever 2 from moving downward during the measurement process.

[0024] Furthermore, the clamping mechanism includes a spring 2 5 sleeved on the outside of the stepped shaft 10, two clamping spacers 4 connected to both ends of the spring 2 5, the upper clamping spacer 4 fits with the end of the cantilever 2, the lower clamping spacer 4 fits with the end of the clamping nut 3, the stepped shaft 10 passes through the clamping spacer 4 and the clamping nut 3, and the clamping nut 3 and the stepped shaft 10 are connected by threads. The cantilever 2 can be elastically clamped by the clamping mechanism.

[0025] The working principle of the utility model is as follows:

[0026] First, place the centering mechanism in the inner hole 12 of the wheel hub, and rotate the adjusting nut 6 to drive the tapered shaft 11 to move axially, and drive the inner support shaft 8 to move radially through the tapered shaft 11. Specifically, when the tapered shaft 11 moves downward, the inner support shaft 8 will be squeezed by the tapered shaft 11 and move outward. When the tapered shaft 11 moves upward, under the action of the spring 19, the inner support shaft 8 will move inward, and one end of the large ball head will always fit on the side of the tapered shaft 11. Thus, the change of the circumscribed circle of the inner support shaft 8 is realized by the above method, thereby realizing the adjustment of the working range of the centering mechanism, so that the small ball head end of the inner support shaft 8 can be against the inner wall of the inner hole 12 of the wheel hub with different apertures. Since three points can determine a circle, the center of the circle determined by the three points at the end of the inner support shaft 8 in the present device is the center of the inner hole of the wheel hub workpiece, thereby realizing centering.

[0027] After the centering is completed, the position of the end of the dial indicator 1 can be adjusted to make it abut against the outer side of the inner hole 12 of the wheel hub, and then the clamping nut 3 is rotated to drive the upper clamping spacer 4 to descend, and under the action of the spring 2 5, the lower clamping spacer 4 is pressed, thereby elastically clamping the end of the cantilever 2 to prevent the cantilever 2 from shaking up and down during the swinging process;

[0028] Afterwards, with the stepped shaft 10 as the rotation axis, the staff can swing the cantilever 2. During the swinging process, the end of the dial indicator 1 will move outside the hub inner hole 12. At this time, the staff needs to check the display on the dial indicator 1 to achieve the coaxiality measurement.

[0029] The above embodiments are only preferred embodiments of the present utility model. Those skilled in the art can obtain other embodiments from the above embodiments without creative work. Therefore, the present application protects not only the above embodiments, but also the scope consistent with the principles and features of the present application.

Claims

1. A wheel hub coaxiality measuring device, characterized in that: It comprises a centering mechanism for positioning the inner hole (12) of the wheel hub, an adjusting mechanism connected to the centering mechanism, a stepped shaft (10) connected to the adjusting mechanism, a measuring mechanism connected to the side of the stepped shaft (10), and a clamping mechanism connected to the measuring mechanism and the stepped shaft (10), wherein the adjusting mechanism is used to adjust the working range of the centering mechanism, the measuring mechanism is used to measure the coaxiality of the wheel hub, and the clamping mechanism is used to limit the measuring mechanism; The centering mechanism comprises an inner support frame (7), a plurality of inner support shafts (8) slidably connected to the inner support frame (7), one end of the inner support shaft (8) is connected to the adjustment mechanism, and the other end abuts against the inner wall of the inner hole (12) of the wheel hub, a spring (9) is sleeved on the outer side of the inner support shaft (8), one end of the spring (9) is connected to the inner support shaft (8), and the other end is connected to the inner support frame (7); The measuring mechanism comprises a tapered shaft (11) whose side abuts against the end of the inner support shaft (8), an adjusting nut (6) connected to the end of the tapered shaft (11), the stepped shaft (10) passes through the center of the tapered shaft (11) and the adjusting nut (6), the adjusting nut (6) and the stepped shaft (10) are connected by threads, and the adjusting nut (6) and the tapered shaft (11) are rotatably connected to the inner support frame (7).

2. The wheel hub coaxiality measuring device according to claim 1, characterized in that: The measuring mechanism comprises a cantilever (2) having one end rotatably connected to the outer side of the stepped shaft (10), and a dial indicator (1) connected to the other end of the cantilever (2); the dial indicator (1) passes through the cantilever (2), and the end of the dial indicator (1) abuts against the outer wall of the inner hole (12) of the wheel hub.

3. The wheel hub coaxiality measuring device according to claim 2, characterized in that: The clamping mechanism comprises a spring 2 (5) sleeved on the outside of the stepped shaft (10), and two clamping spacers (4) connected to the two ends of the spring 2 (5), wherein one of the clamping spacers (4) is in contact with the end of the cantilever (2), and the other is in contact with the end of a clamping nut (3), the stepped shaft (10) passes through the clamping spacer (4) and the clamping nut (3), and the clamping nut (3) and the stepped shaft (10) are connected by threads.

Images