End ring flatness testing fixture suitable for hubs of multiple specifications

Abstract

The utility model discloses an end ring planeness testing fixture suitable for hubs of multiple specifications, which comprises a base, testing seats, a positioning shaft, a testing probe and a probe mounting rack, a shaft hole of a hub is in clearance fit with the positioning shaft, the positioning shaft is vertically and rotatably mounted at the center of the base, the three testing seats are annularly and uniformly arrayed around the center of the positioning shaft, and the testing probe is mounted on the testing seat. Each detection seat comprises multiple stages of detection tables of an integrated structure, the cross section of each detection table is in a fan arc shape, the multiple stages of detection tables are sequentially distributed in a step-by-step descending step structure in the circumferential direction, the radiuses of the inner arc surfaces of the detection tables are reduced step by step, and the table surfaces of the same-stage detection tables of the three detection seats are located on the same horizontal plane; constructing a plurality of annular step detection planes of which the inner diameters are distributed in a gradient manner; according to the detection tool, the flatness of the end rings of hubs of various specifications can be detected by using an automatic detection technology, the utilization rate of the detection tool is improved, the production and detection procedures of the hubs of various specifications and batches can be flexibly arranged, the structure is simple, the detection efficiency is high, and flatness data with higher precision can be provided.

Description

Technical Field

[0001] This utility model relates to the field of tooling and inspection technology, specifically to an end ring flatness inspection tool applicable to multiple specifications of wheel hubs. Background Technology

[0002] Poor flatness of the wheel hub rim can lead to uneven grinding during processing, resulting in inconsistent width of the rim end ring and even the presence of black skin. This not only affects the aesthetics of the wheel but may also cause the wheel hub to fail dynamic balance. Therefore, the flatness of the end ring needs to be continuously checked before and during grinding to guide the processing technology and processing values ​​of the rim end ring.

[0003] Currently, flatness inspection of wheel hub end rings is time-consuming and labor-intensive. It typically involves manually inserting feeler gauges into the hub and inspection platform, resulting in insufficient accuracy and reliability. With the development of advanced inspection technologies, utilizing these technologies for auxiliary inspection is a key direction for advanced manufacturing. Existing technologies also utilize automated inspection techniques, such as patent CN202323089936.X, which describes an online flatness inspection device for wheel hub end faces. However, this patented technology is only applicable to hubs with concave drum surfaces. For hubs with convex drum surfaces, a dedicated annular inspection platform and station are required for each hub size, along with a corresponding inspection probe. This not only increases the cost of the inspection tool but also requires a large work area, hindering flexible production scheduling. Therefore, there is an urgent need to design an inspection tool suitable for multi-size hubs, especially those with convex drum surfaces, for flatness inspection. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an end ring flatness inspection tool applicable to multiple wheel hub specifications, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A flatness inspection fixture for end rings of various wheel hub sizes includes a base, inspection seats, a positioning shaft, an inspection probe, and a probe mounting bracket. The wheel hub's shaft hole is clearance-fitted with the positioning shaft. The positioning shaft is vertical and rotatably mounted at the center of the base. Three inspection seats are evenly arrayed in a ring around the center of the positioning shaft. Each inspection seat includes a multi-stage inspection platform with an integral structure. The cross-section of each inspection platform is fan-shaped. The multi-stage inspection platforms are distributed in a stepped structure with progressively decreasing height along the circumference, and the radius of the inner arc surface of each stage of the inspection platform decreases step by step. The platforms of the same stage of the three inspection seats are located on the same horizontal plane, forming multiple annular stepped inspection planes with gradient inner diameters, used for the flatness inspection of end rings of various wheel hub sizes. The probe mounting bracket is set on the outside of any inspection seat, and the inspection probe is mounted on the probe mounting bracket with its detection center aligned with the platform surface.

[0007] Furthermore, the positioning shaft is provided with multiple positioning shaft segments, which respectively correspond to the hub shaft holes on each level of the testing platform.

[0008] Furthermore, it also includes a low-speed motor and a synchronizing plate. The low-speed motor drives the positioning shaft to rotate synchronously, and the synchronizing plate is detachably connected to the upper end of the positioning shaft and the inner flange end face of the hub.

[0009] Furthermore, multiple flange connection holes are provided on the synchronization plate to accommodate the connection of various wheel hub specifications. A synchronization hole is provided through the middle of the synchronization plate, and the synchronization hole can be inserted into the upper end of the positioning shaft for transmission.

[0010] Furthermore, the base is provided with an adjustment groove, and the detection seat also includes a bottom plate. The bottom plate is connected to the adjustment slider in the adjustment groove by positioning screws for radial adjustment of the detection seat.

[0011] Furthermore, the mounting bracket is provided with multiple mounting holes, each corresponding to a different level of testing station. The testing probe is inserted into the mounting hole and fixed by the set screw on the mounting hole.

[0012] Compared with the prior art, the end ring flatness inspection tool of this utility model applicable to multi-specification wheel hubs has the following beneficial effects:

[0013] This inspection fixture, with its progressively decreasing height and inner arc radius of inspection platforms, can support wheel hub end rings of different specifications. The height difference between the inspection platforms allows for clearance of the wheel hub's convex surface. Furthermore, the axial arrangement of the inspection platforms facilitates close proximity of the inspection probe for flatness testing, improving inspection reliability. Thus, this fixture can meet the requirements of using automated inspection technology to perform flatness testing on the end rings of various wheel hub specifications, increasing the fixture's utilization rate and facilitating flexible scheduling of production and inspection processes for multiple batches of wheel hubs. In addition, its simple structure, high inspection efficiency, and ability to provide higher precision flatness data to guide subsequent grinding processes are also noteworthy. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the inspection tool of this utility model;

[0015] Figure 2 This is an exploded view of the assembly of the inspection tool of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the inspection tool of this utility model.

[0017] In the diagram: 1. Hub; 11. Inner flange end face; 2. Positioning shaft; 21. Synchronous shaft section; 22. Positioning shaft section; 23. Drive shaft section; 3. Synchronous plate; 31. Flange connection hole; 32. Synchronous hole; 4. Detection seat; 41. Detection table; 42. Base plate; 5. Base; 51. Adjustment slide; 6. Low-speed motor; 7. Transmission disc; 8. Probe mounting bracket; 81. First frame; 82. Second frame; 83. Mounting slot; 84. Mounting hole; 85. Fixing screw hole; 9. Connecting screw. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only the preferred embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This embodiment provides an end ring flatness inspection tool applicable to multiple wheel hub sizes. It can be used for wheel hubs 1 with protruding or recessed outer surfaces. Using laser or ultrasonic testing technology, it detects the gap width between the end ring plane and the detection plane, guiding the grinding amount in the end ring grinding process. Figures 1-3 As shown, the inspection fixture includes a base 5, a detection seat 4, a positioning shaft 2, a detection probe, and a probe mounting bracket 8. The positioning shaft 2 is vertical and rotatably mounted at the center of the base 5. The three detection seats 4 are evenly arranged in a ring around the positioning shaft 2 and mounted on the platform of the base 5. The hub 1 is sleeved on the positioning shaft 2 through a shaft hole. The shaft hole and the positioning shaft 2 are in transition fit to prevent the machining accuracy of the positioning shaft 2 from affecting the detection of the flatness of the end ring. The end ring of the hub 1 is in contact with the three detection seats 4 to achieve three-point support.

[0020] The inspection seat 4 is used for supporting and inspecting various sizes of wheel hubs 1, such as... Figure 2 As shown, the detection seat 4 is a multi-stage detection platform 41 with an integral structure. The multi-stage detection platform 41 sits on the base plate 42 below it. The cross-section of the detection platform 41 is fan-shaped, and its center coincides with the center of the positioning shaft 2. The multi-stage detection platform 41 is arranged around its center circumferentially and is distributed in a step structure with progressively decreasing height. At the same time, the radius of the inner arc surface of each stage of the detection platform 41 decreases step by step. The outer arc surface of each stage of the detection platform 41 can be a coplanar structure. In this way, the platform surfaces of the same stage of the three detection seats 4 are located on the same horizontal plane, which can form multiple annular step detection planes with gradient inner diameters. These planes are adapted to various wheel hubs 1 with different end ring specifications. Under the coarse positioning action of the positioning shaft 2, the wheel hub 1 is accurately placed on the corresponding annular step detection plane. The step height difference of the detection platform 41 is determined by the outer bulge surface structure size of the corresponding wheel hub 1.

[0021] The detection probe is used to collect the gap between the end ring plane of the hub 1 and the detection plane. Its wave axis or optical axis center should be aligned with the outer edge of the end ring and point towards the center of the hub 1. To accurately position the detection probe, it is installed and positioned using the probe mounting bracket 8, located outside any detection seat 4. To utilize the same detection probe for detection of various levels of detection planes, such as... Figure 3 As shown, the mounting frame includes at least a first frame 81 and a second frame 82, which support the detection probe at two points to keep it horizontal. The second frame 82, which is close to the detection plane, is provided with multiple mounting holes 84, which correspond to each level of the detection platform 41. The mounting holes 84 are provided with fixing screw holes 85. The first frame 81 can be provided with an arc-shaped mounting groove 83. The rear end of the detection probe is located in the mounting groove 83, and the front end passes through the mounting hole 84 and is fixed by the set screw of the fixing screw hole 85. The central axis of the mounting groove 83 and the mounting hole 84 are collinear and perpendicular to the tangential direction of the detection point on the detection plane of that level.

[0022] As a further technical solution, in order to adapt to the positioning of multi-specification wheel hubs 1, the positioning shaft 2 is set with corresponding multi-level positioning shaft segments 22 according to the height of different detection planes. According to the layout design of the detection planes, the shaft hole of the large-size wheel hub 1 is correspondingly larger, and the shaft hole of the small-size wheel hub 1 is correspondingly smaller. The detection platform 41 of the large-size wheel hub 1 is located at the highest step. Thus, the multi-level positioning shaft segments 22 are processed with the shaft diameter decreasing sequentially from top to bottom.

[0023] Considering the unevenness of manually driven wheel hub 1 rotation, which is detrimental to information collection by automatic detection technology, this embodiment provides an automatic drive rotation technical solution, such as... Figure 1 As shown, the detection system also includes a transmission disc 7, a low-speed motor 6, and a synchronization plate 3. The transmission disc 7 is rotatably mounted on the base 5 via bearings. The transmission disc 7 can be an integral structure with the positioning shaft 2, or it can be a detachable transmission structure, such as... Figure 2 As shown, the lower end of the positioning shaft 2 is connected to the transmission disk 7 through the drive shaft section 23 of the spline structure. Of course, a key connection can also be used. The transmission disk 7 can serve as an intermediate connecting part between the output end of the low-speed motor 6 and the positioning shaft 2. Its upper end is a spline structure shaft hole adapted to the lower end of the positioning shaft 2, and its lower end is a keyway shaft hole adapted to the output shaft of the low-speed motor 6 or a shaft structure adapted to the coupling. The low-speed motor 6 is set in the lower accommodating space of the detection seat 4. The low-speed motor 6 drives the positioning shaft 2 to rotate synchronously through the transmission disk 7. The synchronous plate 3 is used to synchronously transmit the rotation of the positioning shaft 2 to the hub 1. The synchronous plate 3 is installed using the flange hole on the flange end face 11 inside the hub 1. The synchronous plate 3 is provided with a synchronous hole 32, which is a keyway hole. It is inserted and transmitted with the synchronous shaft section 21 of the spline structure at the upper end of the positioning shaft 2.

[0024] As a further technical solution, since the flange specifications of various wheel hubs 1 are not the same, in order to make the most of the same timing plate 3 to connect various wheel hubs 1, multiple sets of flange connection holes 31 are opened on the timing plate 3 according to the flange specifications of the wheel hub 1. The drive of the wheel hub 1 is a low-speed, low-load transmission. Therefore, only two opposite flange connection holes 31 are needed to connect in each set of flange connection holes 31 to achieve transmission. After different specifications of wheel hub 1 are placed, the distance between their flange holes and flange connection holes 31 is different. The length of the connecting screw 9 should be selected according to the corresponding distance.

[0025] As a further technical solution, to facilitate fine-tuning of the fixed position of the testing seat 4, the base 5 is provided with an adjustment groove 51 or a waist-shaped mounting hole 84. In this embodiment, the adjustment groove 51 is preferred. In this way, as the wheel hub 1 product is updated and iterated, the position of the testing seat 4 can be adjusted to quickly adapt to different batches of products, such as... Figure 2 and Figure 3 As shown, the base plate 42 of the detection seat 4 is connected to the adjusting slider in the adjusting groove 51 by positioning screws. The adjusting direction of the adjusting groove 51 is towards the center of the base 5. Therefore, the position of the detection seat 4 can be adjusted and locked radially along the base 5.

[0026] The directional words "up," "down," "end," "side," "front," and "back" mentioned in this article are based on... Figures 1-3 The coordinates or orientation relationships shown are explained in detail. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation;

[0027] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the terms "above" and "inside" may also be used in certain situations to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A end ring flatness gauge for multi-specification wheel hub, characterized in that: The application relates to a wheel hub ring flatness detection device, which comprises a base, detection seats, a positioning shaft, detection probes and a probe mounting rack, the shaft hole of a wheel hub is in clearance fit with the positioning shaft, the positioning shaft is vertically and rotatably arranged at the center of the base, three detection seats are uniformly arranged in a ring shape around the center of the positioning shaft, the detection seat comprises a multi-stage detection table of an integrated structure, the cross section of the detection table is in a fan arc shape, the multi-stage detection table is sequentially distributed in a step structure with the height gradually decreasing along the circumference, the inner arc surface radius of each stage of the detection table gradually decreases, the table surfaces of the detection tables of the same stage of the three detection seats are located on the same horizontal plane, a plurality of ring step detection planes with gradient distribution of inner diameters are formed, and the ring step detection planes are used for detecting the end ring flatness of wheel hubs of various specifications; the probe mounting rack is arranged outside any detection seat, the detection probe is mounted on the probe mounting rack, and the detection center of the detection probe is aligned with the table surface of the detection table.

2. The end ring flatness gauge for multi-specification wheel hub of claim 1, wherein: The positioning shaft is provided with multi-stage positioning shaft segments, and the shaft holes on the detection tables of various stages are correspondingly adapted.

3. The end ring flatness gauge for multi-specification wheel hub of claim 2, wherein: The device further comprises a low-speed motor and a synchronous plate, the low-speed motor drives synchronous rotation of the positioning shaft, and the synchronous plate is detachably connected to the upper end of the positioning shaft and the inner flange end surface of the wheel hub.

4. The end ring flatness gauge for multi-specification wheel hub of claim 3, wherein: A plurality of flange connection holes are formed in the synchronous plate and used for connecting wheel hubs of various specifications, a synchronous hole is formed in the middle of the synchronous plate, and the synchronous hole is in transmission plug connection with the upper end of the positioning shaft.

5. The end ring runout gauge for multi-specification hubs of any one of claims 1 to 4, wherein: An adjusting sliding groove is formed in the base, the detection seat further comprises a bottom plate at the bottom, the bottom plate is connected to an adjusting sliding block in the adjusting sliding groove through a positioning screw, and the detection seat is adjusted along the radial direction.

6. The end ring runout gauge for multi-specification hubs of any one of claims 1 to 4, wherein: The mounting rack is provided with a plurality of mounting holes corresponding to the detection tables of various stages, the detection probe is arranged in the mounting hole, and the detection probe is fixed by a clamping screw on the mounting hole.

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