Tool for hub composite press fitting

Abstract

The invention relates to the technical field of hub press fitting, and discloses a hub composite press fitting tool which comprises a lower bottom plate, a mounting base is fixedly arranged at the bottom of the lower bottom plate, and guide assemblies are symmetrically arranged at the top of the lower bottom plate; the upper bottom plate is arranged above the lower bottom plate in a lifting mode through a guide assembly, a containing groove is formed in the top of the upper bottom plate, a bolt base is detachably arranged on the inner side of the containing groove, and press-fitting bolt holes are formed in the bolt base in a circumferential array mode; and the positioning assemblies are inserted into the press-fitting bolt holes, are distributed in a circumferential array mode relative to the axis of the containing groove, are driven by external force to move in the radial direction of the containing groove and are used for positioning the bolt base. The tool for hub composite press fitting can effectively solve the problem that in the prior art, bolt holes in the bottom of a hub are inconvenient to align with bolt press fitting holes in a bolt base.

Description

Technical Field

[0001] This invention relates to the field of wheel hub press-fitting technology, and more specifically to a tooling for composite press-fitting of wheel hubs. Background Technology

[0002] The wheel hub assembly is a core component of the vehicle's driving system, and its assembly precision directly affects the vehicle's ride comfort, safety, and lifespan. A typical wheel hub assembly usually requires the bearings, oil seals, bolts, and other components to be press-fitted in a specific order.

[0003] In related technologies, to facilitate the press-fitting of bearings at both ends of the wheel hub, for example, patent CN113579724B provides a tooling for composite press-fitting of wheel hubs. In this device, the upper part of the positioning sleeve of the lower press-fitting mechanism penetrates the upper base plate and is fitted with a lower bearing press-fitting platform. The lower bearing press-fitting platform is fitted with a short cylindrical bolt base, and the bolt base is evenly provided with axially penetrating bolt press-fitting holes. The upper part of the lower bearing press-fitting platform extends out of the upper end face of the bolt base and is truncated cone-shaped. The wheel hub bolts are pressed into the bolt holes of the wheel hub one by one through the bolt press-fitting mechanism, and the outer ring of the lower bearing is pressed into the lower bearing hole of the wheel hub. Then, the outer ring of the bearing can be installed through the upper bearing press-fitting mechanism without turning the wheel hub over. Finally, the skeleton oil seal is pressed into the oil seal seat through the oil seal press-fitting mechanism.

[0004] While the existing technical solutions described above can achieve the effect of pressing the bearings at both ends of the wheel hub without flipping them over by setting up a lower bearing pressing table, when placing the wheel hub on top of the upper base plate, it is necessary to ensure that the bolt holes at the bottom of the wheel hub correspond one-to-one with the bolt pressing holes on the bolt base. Due to the lack of a positioning structure when placing the wheel hub, it is inconvenient to align the bolt holes at the bottom of the wheel hub with the bolt pressing holes on the bolt base. Traditional manual adjustment has low alignment accuracy and low work efficiency, which affects the pressing quality and efficiency of the wheel hub. Summary of the Invention

[0005] Technical problems to be solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a tooling for composite pressing of wheel hubs, which can effectively solve the problem that the bolt holes at the bottom of the wheel hub are inconvenient to align with the bolt pressing holes on the bolt base in the prior art.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: This invention provides a tooling for composite press-fitting of wheel hubs, comprising: The lower base plate has a mounting base fixedly installed at its bottom and guide components symmetrically arranged at its top. The upper base plate is raised and lowered above the lower base plate by a guide assembly. The top of the upper base plate has a placement groove, and a bolt base is detachably installed inside the placement groove. The bolt base has press-fit bolt holes arranged in a circular array inside. A positioning component is inserted into the inside of the press-fit bolt hole. The positioning component is arranged in a circumferential array relative to the axis of the placement groove and is driven by an external force to move radially along the placement groove for positioning the bolt base. The fixing component is located on the top of the upper base plate and outside the placement slot, and is used to fix the bolt base behind the workstation. The support plate is located at the bottom of the lower base plate and is used to support the positioning components to move up and down synchronously with the upper base plate. The positioning component includes a positioning tube inserted into the press-fit bolt hole. The outer circumference of the positioning tube has radial receiving grooves arranged in a circular array. Positioning blocks are rotatably arranged inside each radial receiving groove. The positioning blocks are driven by external force to rotate and unfold into a cone shape to support the bolt hole at the bottom of the wheel hub. The contact surface between the positioning block and the wheel hub is a conical arc surface structure.

[0007] Furthermore, a central cylinder is coaxially arranged on the top of the lower base plate and the placement groove. A lower bearing pressing platform is detachably arranged on the top of the central cylinder. The lower bearing pressing platform is located inside the bolt base and matches the lower bearing outer ring of the wheel hub. Limiting posts are symmetrically fixed on the top of the lower base plate to limit the pressing process of the upper base plate. The inner side of the upper base plate is coaxially provided with a central through hole for accommodating the lower bearing press-fitting platform. The upper base plate moves up and down under the pressure of the upper bearing press-fitting platform above. The upper bearing press-fitting platform is correspondingly arranged with the outer ring of the upper bearing of the wheel hub.

[0008] Furthermore, the positioning tube is connected through the lower base plate and the upper base plate. An inner rod is slidably provided on the inner side of the positioning tube along the axial direction. A support block is fixedly provided on the outer side of the inner rod corresponding to the positioning block. An inclined surface B is provided on the top of the support block near the positioning block to limit and support the tilt angle of the positioning block after it is unfolded. A fixing pin for installing the positioning block is fixedly installed on the inner side of the positioning tube at the top of the radial receiving groove. An axial receiving groove for accommodating the support block is opened on the inner side of the positioning tube. A limiting groove is opened on the inner side of the positioning tube corresponding to the rotating end of the positioning block. The positioning block slides in conjunction with the limiting groove.

[0009] Furthermore, the positioning block rotates downwards to reset itself by its own gravity, and the bottom of the positioning block near the support block has an inclined surface A on the inclined surface B.

[0010] Furthermore, a limiting ring is fixedly installed on the outside of the positioning tube, the limiting ring is located at the bottom of the upper base plate, a push rod is fixedly installed at the bottom of the inner rod, the push rod passes through the lower base plate and is slidably connected to the bearing plate, a spring B is installed between the positioning tube and the push rod, the push rod is driven by external force to move axially, and is used to drive the positioning tube and the inner rod to move up and down in sequence.

[0011] Furthermore, connecting plates are symmetrically fixed on the outer side of the bearing plate, and the connecting plates are all fixed on the outer side of the upper base plate. A sliding groove is opened on the inner side of the bearing plate corresponding to each positioning component. The sliding groove is arranged radially along the placement groove. A slider is slidably arranged on the inner side of the sliding groove. The slider is slidably arranged on the outer side of the push rod. The slider is driven by external force to slide synchronously along the radial direction of the placement groove. The lower base plate has an adjustment hole A parallel to the slide groove on its inner side, and the upper base plate has an adjustment hole B parallel to the slide groove on its inner side. The positioning component is connected to the lower base plate and the upper base plate through the adjustment holes A and B, respectively.

[0012] Furthermore, a gear B is rotatably mounted on the bottom of the support plate. The gear B is coaxially mounted with the placement groove. A waist hole is opened on the inner side of the gear B corresponding to the slider. A sliding sleeve is slidably mounted on the inner side of each waist hole. The sliding sleeve is fixedly mounted on the bottom of the slider. A hydraulic cylinder for driving the push rod to move up and down is fixedly mounted on the bottom of the sliding sleeve. The gear B is driven to rotate by external force.

[0013] Furthermore, a fixed shaft is fixedly installed at the bottom of the bearing plate, the fixed shaft is rotatably installed inside the gear B, a detector is fixedly installed at the bottom of the fixed shaft, the detector is correspondingly installed with the sliding sleeve, and a detection mark is fixedly installed on the outer side of the sliding sleeve corresponding to the detection end of the detector.

[0014] Furthermore, the fixing component includes cams arranged in a circular array. The cams are all rotatably mounted on the top of the upper base plate and are driven by external force to rotate synchronously to clamp and fix the bolt base.

[0015] Furthermore, the top of the upper base plate has an annular groove located outside the placement groove, and the top of the lower base plate has rotating grooves arranged in a circular array. The fixing assembly also includes a connecting shaft fixedly disposed at the end of the camshaft. A gear A is fixedly disposed on the outside of the connecting shaft. The gear A is rotatably disposed on the inside of the rotating groove through the connecting shaft. All gears A are meshed on the outside of the gear ring. The gear ring is rotatably disposed on the inside of the annular groove. A shaft bracket is rotatably disposed at the bottom of the cam. The shaft bracket is fixedly disposed on the top of the upper base plate. One of the gears A is driven to rotate by an external force.

[0016] Beneficial effects The technical solution provided by this invention has the following advantages compared with the prior art: This invention uses a positioning component to coaxially position the bolt base placed inside the placement groove, so that the placement groove is located on the pressing axis of the wheel hub. Furthermore, by setting a positioning tube to coaxially position the bolt base and then adjusting it to the center of the pressing bolt hole, the positioning tube can provide positioning support for the wheel hub through the positioning block on the outside, thus achieving the effect of quickly aligning the bolt hole at the bottom of the wheel hub with the pressing bolt hole. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 This is a side view of the structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the bottom structure of the support plate in an embodiment of the present invention; Figure 4 This is an exploded structural diagram of the fixing component according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the bottom plate in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the support plate in an embodiment of the present invention; Figure 7 This is a schematic diagram of the positioning component and gear B in an embodiment of the present invention; Figure 8 This is an exploded structural diagram of the positioning component according to an embodiment of the present invention; Figure 9 This is a cross-sectional structural diagram showing the working state of the positioning component in an embodiment of the present invention; Figure 10 This is a cross-sectional view of the positioning component in a non-working state according to an embodiment of the present invention; Figure 11 for Figure 9 Enlarged structural diagram at point A; Figure 12 for Figure 10 An enlarged structural diagram of point B in the middle.

[0019] The labels in the diagram represent: 1. Lower base plate; 11. Mounting base; 12. Guide assembly; 121. Guide post; 122. Limit cap; 123. Spring A; 13. Center cylinder; 131. Conical surface; 14. Lower bearing press-fitting table; 15. Limit post; 16. Adjustment hole A; 2. Upper base plate; 21. Placement groove; 22. Bolt base; 221. Press-fit bolt hole; 23. Center through hole; 24. Countersunk hole; 25. Guide sleeve; 26. Adjustment hole B; 27. Annular groove; 28. Rotation groove; 3. Positioning assembly; 31. Positioning tube; 311. Fixing pin; 312. Limiting groove; 313. Axial receiving groove; 32. Radial receiving groove; 33. Positioning block; 331. Inclined surface A; 34. Inner rod; 35. Support block; 351. Inclined surface B; 36. Limiting ring; 37. Push rod; 38. Spring B; 39. Hydraulic cylinder; 4. Fixed assembly; 41. Cam; 42. Connecting shaft; 43. Gear A; 44. Gear ring; 45. Shaft bracket; 46. Transmission assembly; 47. Hand crank A; 48. Fixing bolt A; 5. Bearing plate; 51. Connecting plate; 52. Housing; 53. Slide groove; 54. Slider; 55. Sliding sleeve; 56. Gear B; 57. Waist hole; 58. Gear C; 59. Worm gear; 510. Worm; 511. Bearing seat; 512. Hand disc B; 513. Fixing bolt B; 514. Fixing shaft; 515. Inspection mark; 6. Upper bearing press-fitting table; 7. Testing instrument. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] Please see Figure 1 - Figure 12This invention provides a technical solution: a tooling for composite pressing of wheel hubs, comprising a lower base plate 1, an upper base plate 2, a positioning component 3, a fixing component 4, and a bearing plate 5. A mounting base 11 is fixedly disposed at the bottom of the lower base plate 1, and guide components 12 are symmetrically disposed at the top of the lower base plate 1. The upper base plate 2 is raised and lowered above the lower base plate 1 via the guide components 12. A placement groove 21 is formed at the top of the upper base plate 2, and a bolt base 22 is detachably disposed inside the placement groove 21. Press-fit bolt holes 221 are arranged in a circular array inside the bolt base 22. The positioning component 3 is inserted into the press-fit bolt holes 221, and is arranged in a circular array relative to the axis of the placement groove 21, and is driven by external force along the placement groove 21. Radial movement is used to position the bolt base 22; the fixing component 4 is set on the top of the upper base plate 2 and located outside the placement groove 21, and is used to fix the bolt base 22 behind the work station; the bearing plate 5 is set at the bottom of the lower base plate 1, and is used to support the positioning component 3 to move synchronously with the upper base plate 2; wherein, the positioning component 3 includes a positioning tube 31, which is inserted into the inside of the press bolt hole 221. The outer periphery of the positioning tube 31 is provided with radial receiving grooves 32 in a circular array. The inner side of the radial receiving grooves 32 is rotatably provided with positioning blocks 33. The positioning blocks 33 are driven by external force to rotate synchronously and unfold into a cone shape, which is used to support the bolt hole at the bottom of the hub; the contact surface between the positioning block 33 and the hub is a conical arc surface structure.

[0023] When pressing the hub and bolt base 22 together, the bolt base 22 is placed inside the placement groove 21. When placing the bolt base 22, the pressing bolt hole 221 is fitted onto the outside of the positioning component 3, laying the foundation for subsequent bolt base 22 positioning. Then, by driving the circumferentially arrayed positioning components 3 to move radially along the placement groove 21, the positioning components 3 synchronously move closer to or further away from the center of the placement groove 21, achieving concentric adjustment of the bolt base 22. Subsequently, the bolt base 22 is fixed by the fixing component 4 to ensure that the bolt base 22 can be quickly aligned coaxially with the placement groove 21 after replacement or loading. Next, according to the inner diameter of the press bolt hole 221, the positioning component 3 is moved to the center position of the press bolt hole 221, so that the positioning component 3 is ready for the subsequent positioning work of the wheel hub; when the wheel hub is placed on the top of the upper base plate 2, the bolt holes at the bottom of the wheel hub are aligned with the positioning component 3. At this time, the positioning blocks 33 around the positioning tube 31 are in the unfolded state. The positioning blocks 33 distributed in a conical shape on the outside of each positioning tube 31 provide coaxial positioning support for some of the bolt holes at the bottom of the wheel hub. Under the action of the positioning tube 31, the bolt holes at the bottom of the wheel hub are coaxially aligned with the press bolt hole 221, so that the wheel hub is aligned with the press bolt hole 221 one by one during press-fitting.

[0024] After the bolt holes at the bottom of the wheel hub are aligned with the press-fit bolt holes 221, a central cylinder 13 is coaxially provided on the top of the lower base plate 1 and the placement groove 21 to facilitate the press-fitting of the lower bearing outer ring to the wheel hub. A lower bearing press-fitting platform 14 is detachably provided on the top of the central cylinder 13 through the tapered surface 131. The lower bearing press-fitting platform 14 is located inside the bolt base 22 and matches the lower bearing outer ring of the wheel hub. Limiting posts 15 are symmetrically fixed on the top of the lower base plate 1 to limit the press-fitting process of the upper base plate 2. A central through hole 23 is coaxially provided on the inner side of the upper base plate 2 and the placement groove 21 to accommodate the lower bearing. The pressing table 14, the upper base plate 2 is raised and lowered by the pressure of the upper bearing pressing table 6 above, the upper bearing pressing table 6 is set corresponding to the outer ring of the upper bearing of the wheel hub; wherein, the guide assembly 12 includes a guide post 121 fixedly set on the top of the lower base plate 1, a limit cap 122 fixedly set on the top of the guide post 121, a spring A123 set on the outer side of the guide post 121 between the lower base plate 1 and the upper base plate 2, a countersunk hole 24 opened on the top of the upper base plate 2 corresponding to the limit cap 122, and a guide sleeve 25 fixedly set on the bottom of the upper base plate 2 corresponding to the guide post 121, the guide sleeve 25 is slidably set on the outer side of the guide post 121.

[0025] When pressing the lower bearing outer ring, place it on top of the lower bearing pressing platform 14. The lower bearing outer ring and the tapered surface on the outer periphery of the lower bearing pressing platform 14 cooperate to ensure coaxiality during pressing. The lower bearing pressing platform 14 is installed by connecting the tapered surface 131 to the central cylinder 13, making it easy to replace and install coaxially. Then, the lower pressing hub pushes the positioning tube 31 downward. At this time, the positioning tube 31 moves downward synchronously with the upper base plate 2 through the bearing plate 5, so that the hub supported by the positioning tube 31 gradually approaches the lower bearing outer ring on the top of the lower bearing pressing platform 14. When the upper base plate 2 moves to the top of the limiting post 15 and can no longer move, the pressing work between the hub and the lower bearing outer ring on the top of the lower bearing pressing platform 14 is completed. At this time, the upper base plate 2 compresses the spring A123 on the outside of the guide post 121, and the hub is pressed down at the top of the hub. As the pressure is gradually released, the spring force of spring A123 keeps the hub in contact with the positioning block 33 and resets it. After the upper base plate 2 is reset, the positioning block 33 is gradually moved into the radial receiving groove 32, so that the support taper formed by the positioning block 33 on the bottom bolt hole of the hub gradually decreases. At this time, the hub moves downward by its own weight until it is located at the top of the bolt base 22. Since the hub is aligned and limited by the positioning block 33 during the descent, the bolt hole of the hub is easy to align with the press bolt hole 221. Finally, the positioning tube 31 is moved downward out of the press bolt hole 221 to perform the press bolt installation work of the hub. Finally, the upper bearing press plate 6 is used to press the upper bearing outer ring with the hub (the press bolt installation process of the hub and the press bolt installation process of the upper bearing press plate 6 on the upper bearing outer ring are existing technologies and will not be described here).

[0026] To drive the positioning block 33, the positioning tube 31 is connected through the lower base plate 1 and the upper base plate 2. An inner rod 34 is slidably mounted axially on the inner side of the positioning tube 31. A support block 35 is fixedly mounted on the outer side of the inner rod 34 corresponding to the positioning block 33. An inclined surface B351 is provided on the top of the support block 35 near the positioning block 33 to limit and support the tilt angle of the positioning block 33 after it is unfolded. A fixing pin 311 for mounting the positioning block 33 is fixedly mounted on the top of the radial receiving groove 32 on the inner side of the positioning tube 31. An axial receiving groove 313 for accommodating the support block 35 is opened on the inner side of the positioning tube 31. A limiting groove 312 is opened on the inner side of the positioning tube 31 corresponding to the rotating end of the positioning block 33, and the positioning block 33 slides in conjunction with the limiting groove 312. The positioning block 33 rotates downwards to reset under its own weight, and an inclined surface A331 is opened on the bottom of the positioning block 33 near the support block 35 corresponding to the inclined surface B351.

[0027] When the positioning block 33 needs to be unfolded, the inner rod 34 is driven to move axially inside the positioning tube 31, causing the inner rod 34 to move the outer support block 35 closer to the positioning block 33 inside the radial receiving groove 32. When the support block 35 moves upward to the bottom of the positioning block 33 inside the axial receiving groove 313, the inclined surface B351 on the outer side of the support block 35 first engages with the inclined surface A331 at the bottom of the positioning block 33, causing the support block 35 to push the positioning block 33 outward, causing the positioning block 33 to rotate upward around the fixing pin 311. When the inner rod 34 moves to the top, the inclined surface B351 engages with the positioning block 33. The inner side fits together, allowing the positioning block 33 to maintain a certain taper for positioning and support of the wheel hub. The rotating end of the positioning block 33 is also limited and supported by the limiting groove 312, improving the stability of the positioning block 33 support. When the positioning block 33 needs to be stored, the inner rod 34 drives the support block 35 to move downward, causing the support block 35 to disengage from the outer side of the positioning block 33. At this time, the positioning block 33 rotates downward under its own weight to be stored inside the radial storage groove 32. This allows the positioning tube 31 to be moved out of the press-fit bolt hole 221 after the positioning block 33 is stored, automatically making way for the subsequent wheel hub bolt press-fit.

[0028] To facilitate the axial movement of the inner rod 34 and the extraction of the positioning tube 31 from the press-fit bolt hole 221, a limit ring 36 is fixedly installed on the outside of the positioning tube 31. The limit ring 36 is located at the bottom of the upper base plate 2. A push rod 37 is fixedly installed at the bottom of the inner rod 34. The push rod 37 passes through the lower base plate 1 and is slidably connected to the bearing plate 5. A spring B38 is installed between the positioning tube 31 and the push rod 37. The push rod 37 is driven by external force to move axially, thereby driving the positioning tube 31 and the inner rod 34 to move up and down in sequence.

[0029] When the positioning tube 31 penetrates the upper base plate 2, the push rod 37 is driven upward by external force, so that the push rod 37 supports the positioning tube 31 to move upward through the elastic force of the spring B38. When the limiting ring 36 on the outside of the positioning tube 31 is at the bottom of the upper base plate 2, it means that the positioning tube 31 has penetrated to the specified height. After the bolt base 22 is placed inside the placement groove 21 and positioned, the push rod 37 is driven to move upward, so that the push rod 37 pushes the inner rod 34 to slide relative to the inside of the positioning tube 31. In turn, the inner rod 34 pushes the support block 35 to move upward relative to the inside of the positioning tube 31 to support and limit the positioning block 33. At this time, the spring B38 is in a compressed state. When the positioning block 33 is stored, the push rod 37 is driven to move downward, so that the spring B38 supports the positioning tube 31 to always be at the specified height. After the inner rod 34 and the support block 35 are reset, the push rod 37 is driven to move downward again, so that the positioning tube 31 can be pulled out of the press bolt hole 221 through the inner rod 34, making the operation more convenient.

[0030] To enable the positioning component 3 to position the bolt base 22, connecting plates 51 are symmetrically fixed on the outer side of the bearing plate 5. The connecting plates 51 are all fixed on the outer side of the upper base plate 2. The inner side of the bearing plate 5 is provided with a sliding groove 53 corresponding to each positioning component 3. The sliding groove 53 is arranged radially along the placement groove 21. A slider 54 is slidably arranged on the inner side of the sliding groove 53. The slider 54 is slidably arranged on the outer side of the push rod 37. The slider 54 is driven by external force to slide synchronously along the radial direction of the placement groove 21. An adjustment hole A16 is opened on the inner side of the lower base plate 1 parallel to the sliding groove 53. An adjustment hole B26 is opened on the inner side of the upper base plate 2 parallel to the sliding groove 53. The positioning component 3 is connected to the lower base plate 1 and the upper base plate 2 through the adjustment hole A16 and the adjustment hole B26, respectively.

[0031] After the bolt base 22 is located inside the placement groove 21, the slider 54 is driven to slide along the groove 53 at the same time, so that the slider 54 drives the positioning component 3 to move radially along the placement groove 21 inside the adjustment hole A16 and the adjustment hole B26, thereby coaxially positioning the bolt base 22 through concentric clamping. Specifically, a gear B56 is rotatably mounted on the bottom of the support plate 5. The gear B56 is coaxially mounted with the placement groove 21. A waist hole 57 is opened on the inner side of the gear B56 corresponding to the slider 54. A sliding sleeve 55 is slidably mounted on the inner side of the waist hole 57. The sliding sleeve 55 is fixedly mounted on the bottom of the slider 54. A hydraulic cylinder 39 for driving the push rod 37 to move up and down is fixedly mounted on the bottom of the sliding sleeve 55. The gear B56 is driven to rotate by external force. Specifically, a gear C58 is meshed on the outer side of the gear B56. A worm gear 59 is coaxially fixedly mounted on the bottom of the gear C58. A worm 510 is meshed on the outer side of the worm gear 59. The gear C58 and the worm 510 are rotatably mounted on the bottom of the support plate 5 through the bearing seat 511. A housing 52 is fixedly mounted on the bottom of the support plate 5. A hand plate B512 is fixedly mounted on the end of the worm 510 extending to the outside of the housing 52. A fixing bolt B513 is threadedly connected to the outer side of the hand plate B512.

[0032] When positioning the bolt base 22, the worm gear 510 is rotated by turning the handwheel B512, which in turn drives the gear C58 to rotate via the worm wheel 59. The gear C58 then drives the gear B56 at the bottom of the support plate 5 to rotate, causing the gear B56 to move through the inner waist hole 57 and actuate the sliding sleeve 55. The sliding sleeve 55 then drives the slider 54 to slide along the slide groove 53, thus achieving a synchronous driving effect on the slider 54. After the bolt base 22 is positioned, the positioning component 3 is adjusted to the center of the press-fit bolt hole 221 by reversing the handwheel B512. The handwheel B512 is then fixed to the outside of the outer shell 52 by the fixing bolt B513 to ensure the coaxiality of the positioning tube 31 and the press-fit bolt hole 221, as well as the stability of the hub support.

[0033] To facilitate the adjustment of the positioning tube 31 to the center position of the press bolt hole 221, a fixed shaft 514 is fixedly installed at the bottom of the bearing plate 5. The fixed shaft 514 is rotatably installed inside the gear B56. A detector 7 is fixedly installed at the bottom of the fixed shaft 514. The detector 7 is correspondingly installed with the sliding sleeve 55. A detection mark 515 is fixedly installed on the outer side of the sliding sleeve 55 corresponding to the detection end of the detector 7.

[0034] When the positioning tube 31 positions the bolt base 22, the positioning tube 31 is close to the inner side of the press bolt hole 221. Since the outer diameter of the positioning tube 31 and the inner diameter of the press bolt hole 221 are known, the distance that the positioning tube 31 needs to be reset after positioning can be known by the difference between their radii. Then, the distance of the detection mark 515 on the outside of the sliding sleeve 55 can be detected by the detector 7, which can indirectly reflect the movement distance of the positioning tube 31, so that the staff can adjust the center position of the positioning tube 31 according to the detection results.

[0035] The fixing component 4 includes cams 41, which are arranged in a circular array. All cams 41 are rotatably mounted on the top of the upper base plate 2 and are driven by external force to rotate synchronously to clamp and fix the bolt base 22. Specifically, the top of the upper base plate 2 has an annular groove 27 on the outside of the placement groove 21, and the top of the lower base plate 1 has a rotating groove 28 arranged in a circular array. The fixing component 4 also includes a connecting shaft 42 fixedly mounted on the shaft end of the cam 41. A gear A43 is fixedly mounted on the outside of the connecting shaft 42. The gear A43 is rotatably mounted on the inside of the rotating groove 28 through the connecting shaft 42. All gears A43 are meshed on the outside of the gear ring 44. The gear ring 44 is rotatably mounted on the inside of the annular groove 27. A shaft bracket 45 is rotatably mounted on the bottom of the cam 41. The shaft bracket 45 is fixedly mounted on the top of the upper base plate 2. One of the gears A43 is driven to rotate by an external force. Specifically, a transmission component 46 is fixedly mounted on the outside of the connecting plate 51. The driving end of the transmission component 46 is coaxially linked with one of the connecting shafts 42. The power end of the transmission component 46 is rotatably connected to the connecting plate 51. A handwheel A47 is fixedly mounted on the power shaft end of the transmission component 46. A fixing bolt A48 is threadedly connected to the outside of the handwheel A47.

[0036] After the bolt base 22 is positioned by the positioning component 3, the hand plate A47 on the outside of the connecting plate 51 is rotated, causing the hand plate A47 to drive one of the gears A43 to rotate through the transmission component 46. The gear A43 then drives the other gears A43 to rotate synchronously through the gear ring 44. The gears A43 drive the cam 41 on the top of the upper base plate 2 to rotate in the same direction, so that the cam 41 concentrically clamps the bolt base 22 to ensure the stability of the bolt base 22 after positioning. Finally, the hand plate A47 is fixed to the outside of the connecting plate 51 by rotating the fixing bolt A48.

[0037] The principle of the tooling used in this application for composite press-fitting of wheel hubs: First, the push rod 37 is driven upward by the hydraulic cylinder 39, causing the push rod 37 to support the positioning tube 31 upward by the elastic force of the spring B38. At this time, the positioning tube 31 is located inside the adjustment hole A16 and the adjustment hole B26. When the limiting ring 36 on the outside of the positioning tube 31 is located at the bottom of the upper base plate 2, it indicates that the positioning tube 31 has penetrated to the specified height. Then, the bolt base 22 to be pressed is placed inside the placement groove 21, and the worm gear 510 is driven to rotate by rotating the handwheel B512, so that the worm gear 510 is driven by the worm wheel 59. The rotating gear C58 drives the gear B56 at the bottom of the support plate 5 to rotate, causing gear B56 to move through the inner waist hole 57 and actuate the sliding sleeve 55. The sliding sleeve 55 then drives the slider 54 to slide along the slide groove 53, achieving a synchronous driving effect on the slider 54. This causes the slider 54 to move the positioning component 3 radially along the placement groove 21 inside the adjustment holes A16 and B26, thereby coaxially positioning the bolt base 22 through concentric clamping. After the bolt base 22 is positioned, it is rotated... The hand disc A47 on the outside of the connecting plate 51 drives one of the gears A43 to rotate through the transmission component 46. The gear A43 drives the other gears A43 to rotate synchronously through the gear ring 44. The gears A43 drive the cam 41 on the top of the upper base plate 2 to rotate in the same direction, so that the cam 41 concentrically clamps the bolt base 22 to ensure the stability of the bolt base 22 after positioning. During the positioning process, since the outer diameter of the positioning tube 31 and the inner diameter of the press bolt hole 221 are known, the distance that the positioning tube 31 needs to be reset after positioning can be known by the difference between their radii. Then, the distance of the detection mark 515 on the outside of the sliding sleeve 55 can be detected by the detector 7, which can indirectly reflect the movement distance of the positioning tube 31. This allows the operator to reverse the hand disc B512 according to the detection results and adjust the positioning component 3 to the center of the press bolt hole 221. The hand disc B512 is fixed to the outside of the outer shell 52 by the fixing bolt B513 to ensure the coaxiality of the positioning tube 31 and the press bolt hole 221 and the stability of the hub support. Then, the hydraulic cylinder 39 continues to drive the push rod 37 to move upward, causing the push rod 37 to push the inner rod 34 to slide relative to the inside of the positioning tube 31. This causes the inner rod 34 to push the support block 35 to move upward relative to the inside of the positioning tube 31, supporting and limiting the positioning block 33. At this time, the spring B38 is in a compressed state. Then, the outer ring of the lower bearing is placed on the top of the lower bearing press table 14, and the outer ring of the lower bearing is engaged with the tapered surface on the outer periphery of the lower bearing press table 14. Then, the bolt holes at the bottom of the hub are aligned with the positioning assembly 3. At this time, the positioning blocks 33 on the periphery of the positioning tube 31 are in an unfolded state. Through each positioning tube 3 The outermost tapered positioning blocks 33 provide coaxial positioning support for some of the bolt holes at the bottom of the hub. Under the action of the positioning tube 31, the bolt holes at the bottom of the hub are coaxially aligned with the press-fit bolt holes 221, so that the hub and press-fit bolt holes 221 can be aligned one by one during press-fitting. Then, by pressing down the hub, it pushes the positioning tube 31 to move downward together. At this time, the positioning tube 31 moves downward synchronously with the upper base plate 2 through the bearing plate 5, so that the hub supported by the positioning tube 31 gradually moves closer to the lower bearing outer ring at the top of the lower bearing press-fitting table 14. When the upper base plate 2 moves to the top of the limiting post 15, it can no longer move. At this time, the wheel hub and the outer ring of the lower bearing on the top of the lower bearing press table 14 are press-fitted. At this time, the upper base plate 2 compresses the spring A123 on the outside of the guide post 121. As the pressure on the top of the wheel hub is gradually released, the spring force of the spring A123 keeps the wheel hub in contact with the positioning block 33 and resets. After the upper base plate 2 is reset, the positioning block 33 is driven to gradually be stored in the radial receiving groove 32, so that the support taper formed by the positioning block 33 on the bottom bolt hole of the wheel hub gradually decreases. At this time, the wheel hub moves downwards gradually by its own weight until it is located on the top of the bolt base 22. During the descent, the positioning block 33 is used for alignment and limiting, making it easy for the wheel hub bolt holes to align with the press-fit bolt holes 221. Finally, the drive push rod 37 is moved downward, so that the spring B38 supports the positioning tube 31 at the specified height until the inner rod 34 and the support block 35 are reset. Then, the drive push rod 37 is moved downward, and the positioning tube 31 is pulled out of the press-fit bolt hole 221 by the inner rod 34. After the positioning tube 31 is moved downward out of the press-fit bolt hole 221, the wheel hub bolts can be press-fitted. Finally, the upper bearing press-fitting table 6 is used to press the bearing outer ring with the wheel hub.

[0038] It is worth noting that the above-mentioned press-fitting method has the following advantages: Firstly, by setting the positioning component 3 to coaxially position the bolt base 22 placed inside the placement groove 21, the placement groove 21 is located on the pressing axis of the wheel hub. Furthermore, by setting the positioning tube 31 to coaxially position the bolt base 22 and then adjusting it to the center of the pressing bolt hole 221, the positioning tube 31 can provide positioning support for the wheel hub through the outer positioning block 33, thus achieving the effect of quickly aligning the bolt hole at the bottom of the wheel hub with the pressing bolt hole 221.

[0039] Secondly, by setting up a linkage structure such as gear B56, waist hole 57, sliding sleeve 55, slider 54 and sliding groove 53, synchronous driving of slider 54 is achieved, ensuring the consistency of slider 54 driving positioning component 3 to move radially along placement groove 21, improving the accuracy of concentric clamping of bolt base 22, and avoiding positioning deviation caused by asynchronous clamping.

[0040] Thirdly, the positioning blocks 33, which are tapered on the outside of the positioning tube 31, support the bolt holes at the bottom of the wheel hub. Combined with the axial movement of the positioning tube 31 and the retraction action of the positioning blocks 33, automatic coaxial positioning and release are achieved before and after the wheel hub is pressed, reducing manual intervention and improving the efficiency and reliability of aligning the wheel hub with the press bolt holes 221.

[0041] Fourthly, by designing a linkage mechanism between push rod 37, spring B38, inner rod 34, and support block 35, it can not only drive the positioning tube 31 to achieve height adjustment and through positioning, but also support and limit the positioning block 33 through the relative sliding of inner rod 34 and support block 35. After pressing, the positioning tube 31 is automatically pulled out by the downward movement of push rod 37, which simplifies the tooling operation process and enhances the automation level of the equipment.

[0042] Fifthly, the top of the lower bearing press table 14 is designed as a conical structure to fit with the outer ring of the lower bearing, so that the outer ring of the lower bearing can be automatically centered when placed. Combined with the positioning component 3 for the coaxial positioning of the bolt base 22, the coaxiality between the hub, the outer ring of the lower bearing and the press bolt hole 221 is further ensured, effectively reducing the assembly stress and wear caused by the misalignment of the components during the press-fitting process.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tooling for composite press-fitting of wheel hubs, characterized in that, include: The bottom plate (1) is fixedly provided with a mounting base (11) at the bottom and guide components (12) are symmetrically provided at the top of the bottom plate (1). The upper base plate (2) is raised and lowered above the lower base plate (1) by the guide assembly (12). The top of the upper base plate (2) is provided with a placement groove (21). A bolt base (22) is detachably provided inside the placement groove (21). The bolt base (22) is provided with press-fit bolt holes (221) in a circular array inside. The positioning component (3) is inserted into the inside of the press bolt hole (221). The positioning component (3) is arranged in a circular array relative to the axis of the placement groove (21) and is driven by external force to move radially along the placement groove (21) to position the bolt base (22). The fixing component (4) is set on the top of the upper base plate (2) and located outside the placement groove (21) for fixing the bolt base (22) behind the work station; The support plate (5) is set at the bottom of the lower base plate (1) to support the positioning component (3) to move synchronously up and down with the upper base plate (2); The positioning component (3) includes a positioning tube (31), which is inserted into the inside of the press bolt hole (221). The outer periphery of the positioning tube (31) is provided with radial receiving grooves (32) arranged in a circular array. The inner side of each radial receiving groove (32) is provided with a positioning block (33). The positioning block (33) is driven by external force to rotate and unfold into a cone shape to support the bolt hole at the bottom of the hub. The contact surface between the positioning block (33) and the hub is a conical arc surface structure.

2. The tooling for composite pressing of wheel hubs according to claim 1, characterized in that, The bottom plate (1) is coaxially provided with a central cylinder (13) on the top and the placement groove (21). The top of the central cylinder (13) is detachably provided with a lower bearing press-fitting platform (14). The lower bearing press-fitting platform (14) is located inside the bolt base (22), and the lower bearing press-fitting platform (14) matches the outer ring of the lower bearing of the hub. The bottom plate (1) is symmetrically fixed with limit posts (15) on the top to limit the press-fitting process of the upper bottom plate (2). The inner side of the upper base plate (2) is coaxially provided with a central through hole (23) for accommodating the lower bearing press table (14). The upper base plate (2) is raised and lowered by the pressure of the upper bearing press table (6). The upper bearing press table (6) is correspondingly set with the outer ring of the upper bearing of the hub.

3. The tooling for composite pressing of wheel hubs according to claim 1, characterized in that, The positioning tube (31) is connected through the lower base plate (1) and the upper base plate (2). An inner rod (34) is slidably provided on the inner side of the positioning tube (31) along the axial direction. A support block (35) is fixedly provided on the outer side of the inner rod (34) corresponding to the positioning block (33). An inclined surface B (351) is provided on the top of the support block (35) near the positioning block (33) to limit and support the tilt angle of the positioning block (33) after it is unfolded. The positioning tube (31) is fixedly provided with a fixing pin (311) for installing the positioning block (33) at the top of the radial receiving groove (32) on the inner side. The positioning tube (31) is provided with an axial receiving groove (313) for accommodating the support block (35) on the inner side. The positioning tube (31) is provided with a limiting groove (312) corresponding to the rotating end of the positioning block (33) on the inner side. The positioning block (33) and the limiting groove (312) are slidably engaged.

4. The tooling for composite pressing of wheel hubs according to claim 3, characterized in that, The positioning block (33) rotates downwards to reset by its own gravity, and the bottom of the positioning block (33) near the support block (35) has an inclined surface A (331) on the side corresponding to the inclined surface B (351).

5. The tooling for composite pressing of wheel hubs according to claim 3, characterized in that, A limiting ring (36) is fixedly installed on the outside of the positioning tube (31). The limiting ring (36) is located at the bottom of the upper base plate (2). A push rod (37) is fixedly installed at the bottom of the inner rod (34). The push rod (37) passes through the lower base plate (1) and is slidably connected to the bearing plate (5). A spring B (38) is provided between the positioning tube (31) and the push rod (37). The push rod (37) is driven by external force to move along the axial direction, which is used to drive the positioning tube (31) and the inner rod (34) to move up and down in sequence.

6. The tooling for composite pressing of wheel hubs according to claim 5, characterized in that, A connecting plate (51) is symmetrically fixed on the outer side of the bearing plate (5). The connecting plate (51) is fixed on the outer side of the upper base plate (2). A sliding groove (53) is opened on the inner side of the bearing plate (5) corresponding to each positioning component (3). The sliding groove (53) is arranged radially along the placement groove (21). A slider (54) is slidably arranged on the inner side of the sliding groove (53). The slider (54) is slidably arranged on the outer side of the push rod (37). The slider (54) is driven by external force to slide synchronously along the radial direction of the placement groove (21). The lower base plate (1) has an adjustment hole A (16) on its inner side parallel to the slide groove (53), and the upper base plate (2) has an adjustment hole B (26) on its inner side parallel to the slide groove (53). The positioning component (3) is connected to the lower base plate (1) and the upper base plate (2) through the adjustment hole A (16) and the adjustment hole B (26) respectively.

7. The tooling for composite pressing of wheel hubs according to claim 6, characterized in that, The bottom of the support plate (5) is rotatably provided with a gear B (56). The gear B (56) is coaxially arranged with the placement groove (21). The inner side of the gear B (56) is provided with a waist hole (57) corresponding to the slider (54). The inner side of the waist hole (57) is slidably provided with a sliding sleeve (55). The sliding sleeve (55) is fixedly provided at the bottom of the slider (54). The bottom of the sliding sleeve (55) is fixedly provided with a hydraulic cylinder (39) for driving the push rod (37) to move up and down. The gear B (56) is driven to rotate by external force.

8. The tooling for composite pressing of wheel hubs according to claim 7, characterized in that, The bottom of the bearing plate (5) is fixedly provided with a fixed shaft (514), which is rotatably provided inside the gear B (56). The bottom of the fixed shaft (514) is fixedly provided with a detector (7), which is correspondingly provided with the sliding sleeve (55). The outer side of the sliding sleeve (55) is fixedly provided with a detection mark (515) corresponding to the detection end of the detector (7).

9. The tooling for composite pressing of wheel hubs according to claim 6, characterized in that, The fixing component (4) includes cams (41), which are arranged in a circular array. The cams (41) are all rotatably mounted on the top of the upper base plate (2) and are driven by external force to rotate synchronously to clamp and fix the bolt base (22).

10. The tooling for composite pressing of wheel hubs according to claim 9, characterized in that, The top of the upper base plate (2) is provided with an annular groove (27) located outside the placement groove (21), and the top of the lower base plate (1) is provided with a rotating groove (28) arranged in a circular array. The fixing component (4) further includes a connecting shaft (42) fixedly disposed at the end of the cam (41) shaft. A gear A (43) is fixedly disposed on the outside of the connecting shaft (42). The gear A (43) is rotatably disposed on the inside of the rotating groove (28) via the connecting shaft (42). All gears A (43) are meshed on the outside of the gear ring (44). The gear ring (44) is rotatably disposed on the inside of the annular groove (27). A shaft bracket (45) is rotatably disposed at the bottom of the cam (41). The shaft bracket (45) is fixedly disposed on the top of the upper base plate (2). One of the gears A (43) is driven to rotate by an external force.

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