X-ray detection hub center positioning rotation clamp

Abstract

The utility model relates to aluminium alloy wheel hub detection technical field, concretely is a kind of X-ray detection wheel hub center positioning self-rotation fixture, comprising: at least four positioning gear sets, for clamping wheel hub edge and drive wheel hub rotation;Driving handle, driving handle quantity corresponds with the positioning gear set quantity;Positioning main shaft module, drive positioning gear set to wheel hub positioning;Rotary drive module, drive positioning gear set rotation, positioning gear set and driving handle movable joint, positioning main shaft module and driving handle movable joint, rotary drive module and positioning gear set transmission connection, positioning gear set includes bevel gear, plane gear and gear shaft, gear shaft middle part and bevel gear fixed connection, gear shaft top and plane gear fixed connection, the distance between bevel gear and plane gear is 10mm, the utility model avoids the clamping failure or self-rotation interruption in wheel hub detection, realizes smooth full circle rotation, significantly improves the continuity of detection process.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy wheel hub inspection technology, specifically to an X-ray inspection wheel hub center positioning and rotation fixture. Background Technology

[0002] In the wheel hub manufacturing process, X-ray non-destructive testing is a crucial step in ensuring internal quality. During testing, the wheel hub needs to be clamped and rotated so that the X-ray system can perform a comprehensive scan of all parts of the hub's circumference. Existing testing fixtures typically use mechanical grippers or center-tightening methods to achieve wheel hub positioning and rotation. However, after casting or forging, wheel hub blanks often have irregular burrs and flash remaining on their edges, and the wheel hub's back cavity structure is complex.

[0003] Traditional clamping devices often use rigid planes or V-blocks as their gripping elements. During clamping, these elements are prone to interference with flash, causing the grippers to jam, fail to close or open smoothly, and consequently resulting in hub center positioning deviations. Furthermore, due to the limited degrees of freedom in the clamping mechanism's design, the hub is prone to eccentric oscillations or intermittent jamming during rotation, preventing continuous and stable full-circumference rotation. This directly leads to difficulties in obtaining complete and continuous projection images for X-ray inspection systems; some areas may be repeatedly inspected while others are missed, reducing inspection reliability and production efficiency.

[0004] Therefore, there is an urgent need to develop an X-ray inspection hub center positioning and rotation fixture to solve the above problems. Utility Model Content

[0005] This invention proposes an X-ray inspection hub center positioning and rotation fixture. By setting up a positioning gear set, a positioning spindle module and a rotation drive module, this invention achieves automatic center positioning and clamping of the hub, effectively solving the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an X-ray inspection hub center positioning and rotation fixture, comprising:

[0007] At least four positioning gear sets are used to clamp the edge of the wheel hub and drive the wheel hub to rotate;

[0008] A drive handle, the number of which corresponds to the number of positioning gear sets;

[0009] The positioning spindle module drives the positioning gear set to position the wheel hub;

[0010] The rotary drive module drives the positioning gear set to rotate;

[0011] The positioning gear set is movably connected to the drive handle, the positioning spindle module is movably connected to the drive handle, and the rotary drive module is driven by the positioning gear set. The positioning gear set includes a helical gear, a planar gear, and a gear shaft. The middle part of the gear shaft is fixedly connected to the helical gear, and the top of the gear shaft is fixedly connected to the planar gear. The distance between the helical gear and the planar gear is 10mm.

[0012] Preferably, the positioning spindle module includes a spindle motor and a square plate. The output shaft of the spindle motor is fixedly connected to the square plate. Positioning rotating shafts are provided at the four lower corners of the square plate. The drive handle is movably connected to the positioning rotating shafts.

[0013] Preferably, the drive handle has an "L" shaped structure and is movably connected to the gear shaft.

[0014] Preferably, a chain driven gear is fixedly connected below the gear shaft.

[0015] Preferably, the rotary drive module is fixed between adjacent positioning gear sets. The rotary drive module is equipped with a rotary motor, and a chain drive gear is fixedly connected above the rotary motor. The chain drive gear is equipped with a drive chain, and the chain drive gear drives two adjacent chain driven gears to rotate through the drive chain.

[0016] Preferably, the inclined angle of the helical gear is 45°, and the inclined surface of the helical gear works in conjunction with the planar gear to clamp the hub.

[0017] Preferably, the outer surfaces of the helical gear and the planar gear are provided with a polyurethane-ceramic composite coating.

[0018] This utility model provides an X-ray inspection wheel hub center positioning and rotation fixture, which has the following advantages compared with existing technologies:

[0019] This invention effectively avoids interference from flash on wheel hub blanks by combining a 45° inclined gear with a flat gear and leaving a 10mm gap between them. The inclined surface of the inclined gear and the flat gear form a trapezoidal clamping area, allowing the flash to freely enter the gap without affecting the normal contact between the gear and the edge of the wheel hub. This avoids clamping failure or rotation interruption caused by flash jamming in traditional fixtures, significantly improving the continuity of the inspection process.

[0020] This invention employs at least four positioning gear sets evenly arranged around the hub, synchronously driven by a rotary drive module via a chain, achieving automatic centering and clamping of the hub. The four gear sets move simultaneously towards the center, ensuring the hub axis coincides with the main rotating shaft axis, eliminating eccentric sway. The helical and planar gears maintain a continuous clamping state, combining positioning clamping with self-rotation drive. The hub rotates smoothly around its circumference under constant clamping force, ensuring the X-ray system can completely scan all circumferential areas of the hub, avoiding any omissions in detection.

[0021] The outer surfaces of the helical gear and the planar gear of this invention are coated with polyurethane, which increases the coefficient of friction with the hub edge, prevents slippage, and avoids direct scratches on the hub surface by the metal gears, thus protecting the quality of the workpiece. This invention has high overall rigidity and fast response, making it suitable for high-frequency inspection requirements in mass production. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a side view of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0025] Figure 3 This is a top view schematic diagram of the present invention;

[0026] Figure 4 This is a schematic diagram showing the installation state of the positioning gear set and drive handle of this utility model;

[0027] Figure 5 This is the front view of the positioning gear assembly of this utility model.

[0028] In the picture:

[0029] 1. Positioning gear set; 101. Helical gear; 102. Planar gear; 103. Gear shaft; 1031. Chain driven gear;

[0030] 2. Drive handle;

[0031] 3. Positioning spindle module, 301, spindle motor, 302, square plate;

[0032] 4. Rotation drive module, 401. Rotary motor, 402. Chain drive gear, 403. Drive chain. Detailed Implementation

[0033] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. The technical solutions of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0034] Please see Figures 1-5 This utility model provides a technical solution:

[0035] An X-ray inspection hub center positioning and rotating fixture mainly includes a positioning gear set 1, a positioning spindle module 3, a drive handle 2, and a rotation drive module 4. The number of positioning gear sets 1 is adjusted according to the specific size of the hub, but is at least four, and they are respectively arranged on the outside of the positioning spindle module 3. The positioning gear sets 1 and the positioning spindle module 3 are movably connected via the drive handle 2. Each positioning gear set 1 consists of a helical gear 101, a planar gear 102, and a gear shaft 103. The gear shaft 103 is vertically arranged, with the helical gear 101 fixedly connected to its middle section. The helical gear 101 has an inclination angle of 45°, and the planar gear 102 is fixedly connected to its top. A 10 mm gap is maintained between the helical gear 101 and the planar gear 102 in the vertical direction. This gap is used to accommodate casting flash or burrs that may exist on the edge of the hub, preventing interference during clamping. A chain driven gear 1031 is fixedly installed at the lower end of the gear shaft 103 to receive the rotational driving force.

[0036] In some embodiments, the positioning spindle module 3 includes a spindle motor 301 and a square plate 302. The shaft of the spindle motor 301 is vertically upward and fixedly connected to the center of the square plate 302. The square plate 302 has a square plate structure, with a positioning shaft at each of its four corners. The drive handle 2 has an L-shaped structure, with a horizontal section at its proximal end having a through hole and being movably connected to the positioning shaft, and a vertical section at its distal end being movably connected to the middle of the gear shaft 103. This allows the drive handle 2 to push the four positioning gear sets 1 to move synchronously toward the center or release outward when the square plate 302 is rotated by the spindle motor 301, thereby achieving center positioning and clamping of the hub.

[0037] In some embodiments, the rotary drive module 4 is fixedly installed between two adjacent positioning gear sets 1. Each rotary drive module 4 includes a rotary motor 401, the output axis of which extends upward and is fixedly connected to a chain drive gear 402. The chain drive gear 402 drives the corresponding positioning gear set 1 to rotate by meshing with two adjacent chain driven gears 1031 on both sides through a drive chain 403. When the hub is clamped, the rotary motor 401 starts, driving the four positioning gear sets 1 to rotate synchronously through the chain. The hub rotates around its own axis under the friction drive of the inclined gear 101 and the planar gear 102. With the help of the X-ray detection system, a blind-angle scan can be achieved.

[0038] In some embodiments, to further optimize the clamping effect and wear resistance, the outer surfaces of both the helical gear 101 and the planar gear 102 are coated with a polyurethane coating. This coating can increase the coefficient of friction with the edge of the hub to prevent slippage, and also prevent the metal gear from directly contacting the surface of the hub and causing scratches.

[0039] The working principle of this utility model:

[0040] When it is necessary to clamp the hub, the main spindle motor 301 rotates in the forward direction, driving the square plate 302 to rotate synchronously around its own central axis. As the positioning shafts at the four corners of the square plate 302 move in a circular motion with the square plate 302, the horizontal end of each L-shaped drive handle 2 is driven by the positioning shaft to swing around the connection point between the vertical section of the drive handle 2 and the gear shaft 103. When the square plate 302 rotates, it drives the four L-shaped drive handles 2 to swing synchronously. Due to inertia, the four drive handles 2 generate relative displacement with the square plate 302, causing the vertical section of the drive handle 2 and its connected gear shaft 103 to slide along an arc path towards the center of the square plate 302. The four gear shafts 103 respectively drive the planar gear 102 and the inclined gear 101 at their top to move synchronously towards the edge of the hub. The inclined gear 101 and the planar gear 102 clamp the hub. Since the four gear sets are arranged symmetrically at the four corners of a square, and the rotation angle of the square plate 302 driven by the main shaft motor 301 is precisely controlled, the four gear sets will move towards the center simultaneously and equally, applying clamping force from the four symmetrical points on the edge of the hub. This clamping force acts on the lower edge and side of the hub edge through the upper surfaces of the 45° inclined gear 101 and the planar gear 102, automatically correcting the central axis of the hub to coincide with the rotation axis of the square plate 302 and the main shaft motor 301, achieving a self-centering clamping effect.

[0041] Once the set clamping force is reached, the spindle motor 301 stops rotating, and the rotary drive module 4 starts. The rotary motor 401 drives the chain drive gear 402 to rotate, which in turn drives all the chain driven gears 1031 to rotate synchronously via the drive chain 403, thereby causing the four positioning gear sets 1 to rotate. Due to the friction between the helical gear 101 and the planar gear 102 and the edge of the hub, the hub is driven to rotate smoothly around its own axis. During the entire rotation process, the spindle motor 301 remains stationary, and the square plate 302 and the drive handle 2 are locked in position. Therefore, the gear sets only rotate without radial movement, and the clamping force remains constant.

[0042] When the inspection is complete and the wheel hub needs to be released, the rotary drive module 4 stops operating, the main spindle motor 301 rotates in the opposite direction, the square plate 302 rotates in the opposite direction, and the four positioning shafts drive the vertical section of the drive handle 2 and its gear shaft 103 to slide outward. The four positioning gear sets 1 move away from the center of the wheel hub in sync, releasing the constraint on the wheel hub. The wheel hub that has been inspected can then be removed, or the next wheel hub to be inspected can be placed in.

[0043] Example 1

[0044] In this embodiment, four positioning gear sets 1 are evenly arranged at the four corners of a square, and the side length of the square plate 302 is 400 mm. The main spindle motor 301 is a servo motor, and the rotary motor 401 is a stepper motor. The rotary motor 401 drives the gear sets to rotate via the drive chain 403, and the rotation speed is controlled at 30 rpm. The hub is a cast aluminum alloy hub with flash on its edge. Since the gap between the helical gear 101 and the planar gear 102 is 10 mm, the flash is completely accommodated in the gap, and there is no jamming during the clamping process. X-ray inspection results show that the imaging of all parts of the hub is clear, with no missed areas.

[0045] Example 2

[0046] The main difference between this embodiment and Embodiment 1 is that the thickness of the polyurethane-ceramic composite coating on the outer surface of the helical gear 101 and the planar gear 102 is 1.5 mm.

[0047] The positioning gear set 1 consists of 6 sets, arranged symmetrically in pairs around the positioning spindle module 3. Each pair of positioning gear sets 1 is connected to a rotary motor 401, with a total of three rotary motors 401 driving the 6 sets of positioning gear sets 1. Synchronous rotation is achieved through synchronous control. This configuration is suitable for X-ray inspection of heavy-duty truck wheel hubs, providing greater clamping friction and driving torque to ensure smooth rotation of large-mass wheel hubs.

[0048] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. For those skilled in the art to which the present invention pertains, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered as falling within the scope of patent protection determined by the submitted claims.

Claims

1. A self-rotating fixture for X-ray inspection of wheel hub center positioning, characterized in that, include: At least four positioning gear sets are used to clamp the edge of the wheel hub and drive the wheel hub to rotate; A drive handle, the number of which corresponds to the number of positioning gear sets; The positioning spindle module drives the positioning gear set to position the wheel hub; The rotary drive module drives the positioning gear set to rotate. The positioning gear set is movably connected to the drive handle, the positioning spindle module is movably connected to the drive handle, and the rotary drive module is driven by the positioning gear set. The positioning gear set includes a helical gear, a planar gear, and a gear shaft. The middle part of the gear shaft is fixedly connected to the helical gear, and the top of the gear shaft is fixedly connected to the planar gear. The distance between the helical gear and the planar gear is 10mm.

2. The X-ray inspection hub center positioning and rotation fixture according to claim 1, characterized in that: The positioning spindle module includes a spindle motor and a square plate. The output shaft of the spindle motor is fixedly connected to the square plate. Positioning rotating shafts are provided at the four corners below the square plate. The drive handle is movably connected to the positioning rotating shafts.

3. The X-ray inspection hub center positioning and rotation fixture according to claim 1, characterized in that: The drive handle has an "L" shaped structure and is movably connected to the gear shaft.

4. The X-ray inspection hub center positioning and rotation fixture according to claim 1, characterized in that: A chain driven gear is fixedly connected below the gear shaft.

5. The X-ray inspection hub center positioning and rotation fixture according to claim 1, characterized in that: The rotary drive module is fixed between adjacent positioning gear sets. The rotary drive module is equipped with a rotary motor. A chain drive gear is fixedly connected above the rotary motor. A drive chain is provided on the chain drive gear. The chain drive gear drives two adjacent chain driven gears to rotate through the drive chain.

6. The X-ray inspection hub center positioning and rotation fixture according to claim 1, characterized in that: The inclined angle of the helical gear is 45°, and the inclined surface of the helical gear works in conjunction with the planar gear to clamp the hub.

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