A machining device for split head bowl bearings

Abstract

The application discloses a split head bowl bearing and a processing device thereof. The split head bowl bearing comprises a bearing inner ring, a bearing outer ring and a retainer, the retainer is located between the bearing inner ring and the bearing outer ring, the bearing inner ring and the bearing outer ring are both composed of two split half circular rings, and the retainer is provided with a split; the processing device of the split head bowl bearing comprises a bottom die assembly, a middle die and an upper die. The bottom die assembly comprises a base and a split positioning device, the split positioning device is arranged on the base, the middle die is placed in a bearing ring to be processed and the outer surface of the middle die is in close contact with the bearing ring, a deformation device is arranged in the middle die, and the split direction of the split positioning device is the same as the stretching direction of the deformation device. The split head bowl bearing can be quickly processed, and the problem of heavy reinstallation of a wire harness during replacement of the split head bowl bearing is solved under the premise of guaranteeing the bearing capacity.

Description

Technical Field

[0001] The invention relates to the field of head cup bearing processing technology, and in particular to a processing apparatus for split head cup bearings. Background Technology

[0002] With the continuous development of cycling demands, more and more high-performance bicycles are adopting headset cable routing designs. This design not only makes the frame look cleaner, but also greatly simplifies the cable layout. Because the headset cable routing openings are larger, wiring and cable replacement become more convenient. At the same time, the headset cable routing design reduces the need for opening holes in critical areas such as the downtube or headtube, thus preserving the structural strength of the frame and optimizing the overall frame design. However, the headset cable routing design also faces some problems, especially when replacing the headset bearing. It is necessary to disassemble the brake lines and E / Shifter cables, increasing the difficulty of maintenance. Currently, the commonly used solid round bearings on the market are relatively complicated to replace and maintain. Summary of the Invention

[0003] The technical problem to be solved by the invention is to provide a processing device for split head cup bearings, which can quickly process split head cup bearings and solve the problem of wire harness reinstallation during head cup bearing replacement while ensuring load-bearing capacity.

[0004] The technical solution adopted by the invention to solve the above-mentioned technical problem is as follows: a split-type head cup bearing, including an inner bearing ring, an outer bearing ring and a cage, wherein the cage is located between the inner bearing ring and the outer bearing ring, and both the inner bearing ring and the outer bearing ring are composed of two split semi-circular rings, and the cage is provided with a slit.

[0005] Furthermore, the cage is equipped with rolling elements, which are tapered needle rollers.

[0006] A processing apparatus for a split-type head cup bearing includes a bottom mold assembly, a middle mold, and an upper mold. The bottom mold assembly includes a base and a split positioning device. The split positioning device is disposed on the base and is used to ensure that the bearing ring to be processed is placed on the base. The middle mold is placed inside the bearing ring to be processed, and the outer surface of the middle mold is in contact with the bearing ring. A deformation device is provided inside the middle mold. The splitting direction of the split positioning device is the same as the stretching direction of the deformation device. When the upper mold presses into the middle mold, the deformation device causes the middle mold to split the bearing ring to be processed into two semicircles.

[0007] Furthermore, the split positioning device includes a coaxial device, two sliders, and two slides. The base has a central clearance hole with a diameter larger than that of the upper mold. The two slides are respectively opened on symmetrical sides of the central clearance hole. The two sliders have a first through groove and a second through groove respectively. The first through groove and the second through groove are axially symmetrical semicircles, and the radii of the first through groove and the second through groove are both larger than the radius of the central clearance hole. The coaxial device is used to ensure that the first through groove, the second through groove, and the central clearance hole are all located on the same axis.

[0008] Furthermore, the coaxial device includes a third spring, which is located in each of the two slide grooves. One end of the third spring abuts against the rear wall of the slide groove, and the other end abuts against the slider.

[0009] Furthermore, the middle mold is annular, and the middle mold includes a first half mold and a second half mold. The deformation device is disposed between the first half mold and the second half mold. The deformation device is used to reset the first half mold and the second half mold that are stretched apart by the upper mold. An anti-error device is provided between the middle mold and the split positioning device. The anti-error device is used to ensure that the splitting direction of the split positioning device is the same as the stretching direction of the deformation device.

[0010] Furthermore, the deformation device includes a first spring and a second spring. The first half-mold has a first mounting hole and a second mounting hole, and the second half-mold has a third mounting hole and a fourth mounting hole. The two ends of the first spring are respectively fixed in the first mounting hole and the third mounting hole, and the two ends of the second spring are respectively fixed in the second mounting hole and the fourth mounting hole.

[0011] Furthermore, the deformation device includes a first adhesive layer and a second adhesive layer. The first adhesive layer is fixed on the cut surface of the first half mold, and the second adhesive layer is fixed on the cut surface of the second half mold. When the middle mold is not in the processing state, the first adhesive layer and the second adhesive layer are bonded to each other. When the upper mold is pressed into the middle mold, the first adhesive layer and the second adhesive layer are separated from each other.

[0012] Furthermore, the error prevention device includes a first protrusion, a second protrusion, a first groove, and a second groove. The first protrusion and the second protrusion are respectively disposed on the outer edges of the upper surfaces of the first half mold and the second half mold. The first groove and the second groove are respectively formed on the upper edges of the first through groove and the second through groove. The first protrusion corresponds to the first groove, and the second protrusion corresponds to the second groove.

[0013] Furthermore, the upper mold is an inverted frustum shape, the diameter of the lower surface of the upper mold is smaller than the inner ring diameter of the middle mold, and the diameter of the upper surface of the upper mold is larger than the inner ring diameter of the middle mold. When the upper mold is gradually pressed down, the first spring and the second spring between the first half mold and the second half mold are stretched, causing the bearing ring to be processed outside the middle mold to be burst into two semicircles.

[0014] Compared with existing technologies, the invention has the advantage that both the inner and outer rings of the bearing are composed of two semi-circular rings, realizing a split structure of the bearing. This eliminates the need to disassemble any wiring harnesses such as brake lines and electrical cables passing through the head tube when replacing the bearing, thus solving the inconvenience of replacing and repairing the head cup bearing of a bicycle. At the same time, a processing device is designed that can accurately process split bearings by using bottom mold positioning, upper mold pressure, and middle mold expansion, ensuring product production efficiency and processing accuracy. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the split-head cup bearing of the present invention;

[0016] Figure 2 This is a partial cross-sectional view of the split-head cup bearing of the present invention;

[0017] Figure 3 This is an exploded view of the split-head cup bearing of the present invention;

[0018] Figure 4 This is a perspective view of the processing apparatus for the split-head cup bearing of the present invention;

[0019] Figure 5 An exploded view of the processing apparatus for the split-head cup bearing of the present invention;

[0020] Figure 6 This is a cross-sectional view of the processing apparatus for the split-head cup bearing of the present invention;

[0021] Figure 7 This is one of the exploded views of the intermediate mold of the processing device for the split-head cup bearing of the present invention;

[0022] Figure 8 This is the second exploded view of the intermediate mold of the processing device for the split-head cup bearing of the present invention;

[0023] Figure 9 This is the third exploded view of the intermediate mold of the processing device for the split head cup bearing of the present invention. Detailed Implementation

[0024] The invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 3As shown, a split-type head cup bearing includes an inner bearing ring 1, an outer bearing ring 2, and a cage 3. The cage 3 is located between the inner bearing ring 1 and the outer bearing ring 2. Both the inner bearing ring 1 and the outer bearing ring 2 are composed of two split semi-circular rings. The cage 3 has a slit 31, and rolling elements 4, which are tapered needle rollers, are installed on the cage 3. When a user replaces the head cup bearing on a bicycle, the old head cup bearing is first removed. Since both the outer bearing ring 2 and the inner bearing ring 1 are composed of two semi-circular rings, they can be separated and removed directly from both sides by hand or pry bar. The cage 3 is pulled open from its slit 31 and removed from the side of the bicycle wiring harness. Then, the two semi-circular inner bearing rings 1 of the new split-type head cup bearing are aligned from the left and right sides and placed into the bearing housing. The cage 3 with the rolling elements 4 is then pulled open from the slit 31 and fitted onto the inner bearing ring 1. The two semi-circular outer bearing rings 2 are aligned from the left and right sides and placed into the bearing housing, completing the installation of the new head cup bearing.

[0026] like Figures 4 to 8As shown, a processing device for a split-type head cup bearing includes a bottom mold assembly, a middle mold 6, and an upper mold 7. The bottom mold assembly includes a base 51 and a split positioning device 52. The split positioning device 52 is disposed on the base 51 and is used to ensure that the bearing ring 8 to be processed is placed on the base 51. The split positioning device 52 includes a coaxial device, two sliders 521, and two slide grooves 522. A central clearance hole 511 is provided on the base 51. The diameter of the central clearance hole 511 is larger than the diameter of the upper mold 7. The two slide grooves 522 are respectively opened on both sides of the central clearance hole 511 symmetrically. The two sliders 521 are respectively provided with a first through groove 523 and a second through groove 524. The two through slots 524 are axially symmetrical semicircles. The radii of the first through slot 523 and the second through slot 524 are both larger than the radius of the central relief hole 511. The coaxial device is used to ensure that the first through slot 523, the second through slot 524 and the central relief hole 511 are all located on the same axis. The coaxial device includes a third spring 525, which is located in the two slides 522 respectively. One end of the third spring 525 abuts against the rear wall of the slide 522, and the other end abuts against the slider 521. The elastic force of the third spring 525 makes the two sliders 521 automatically maintain the center position when there is no workpiece, thereby ensuring that the first through slot 523, the second through slot 524 and the central relief hole 511 automatically maintain coaxiality, further improving the clamping efficiency.The intermediate mold 6 is placed inside the bearing ring 8 to be processed, and the outer surface of the intermediate mold 6 is in contact with the bearing ring 8. A deformation device is provided inside the intermediate mold 6. The intermediate mold 6 is annular and includes a first half mold 61 and a second half mold 62. The deformation device is located between the first half mold 61 and the second half mold 62. The deformation device is used to reset the first half mold 61 and the second half mold 62 that have been stretched open by the upper mold. The deformation device includes a first spring 91 and a second spring 92. The first half mold 61 has a first mounting hole 93 and a second mounting hole 94. The second half mold 62 has a third mounting hole 94. Mounting holes 95 and 96 are provided. The two ends of the first spring 91 are fixed in the first mounting hole 93 and the third mounting hole 95, respectively. The two ends of the second spring 92 are fixed in the second mounting hole 94 and the fourth mounting hole 96, respectively. An anti-misalignment device is provided between the middle mold 6 and the split positioning device 52. This device ensures that the splitting direction of the split positioning device 52 is the same as the stretching direction of the deformation device, avoiding the risk of cracking failure, mold damage, or even workpiece scrap due to incorrect placement of the middle mold 6. The anti-misalignment device includes a first protrusion 611, a second protrusion 612, a third protrusion 613, a fourth protrusion 614, and a fourth protrusion 615. Block 621, first groove 5231 and second groove 5241, first protrusion 611 and second protrusion 621 are respectively disposed on the outer edges of the upper surfaces of the first half mold 61 and the second plate mold 62, the first groove 5231 and second groove 5241 are respectively formed on the upper edges of the first through groove 523 and the second through groove 524, the first protrusion 611 corresponds to the first groove 5231, and the second protrusion 621 corresponds to the second groove 5241. When the first protrusion 611 corresponds to the first groove 5231, the cut surface of the first half mold 61 and the first through groove are aligned. The sides of the second mold 623 are flush with each other. When the second protrusion 621 corresponds to the second groove 5241, the cut surface of the second half mold 62 is flush with the side of the second through groove 524. The upper mold 7 is an inverted frustum shape. The diameter of the lower surface 71 of the upper mold 7 is smaller than the inner ring diameter of the middle mold 6, and the diameter of the upper surface 72 of the upper mold 7 is larger than the inner ring diameter of the middle mold 6. When the upper mold 7 is gradually pressed down, the first spring 91 and the second spring 92 between the first half mold 61 and the second half mold 62 are stretched, causing the bearing ring 8 to be processed outside the middle mold 6 to be split into two semicircles.

[0027] like Figure 9 As shown, the deformation device also has another structure, which includes a first adhesive layer 97 and a second adhesive layer 98. The first adhesive layer 97 is fixed on the cut surface of the first half mold 61, and the second adhesive layer 98 is fixed on the cut surface of the second half mold 62. When the middle mold 6 is not in the processing state, the first adhesive layer 97 and the second adhesive layer 98 are bonded to each other. When the upper mold 7 is pressed into the middle mold 6, the first adhesive layer 97 and the second adhesive layer 98 are separated from each other.

[0028] The method of use is as follows: First, place the bearing ring 8 to be processed into the split positioning device 52. Since the third spring 525 is installed in the two grooves 522, the first through groove 523 and the second through groove 524 are automatically aligned with the center relief hole 511 under the push of the third spring 525 and are on the same axis. The outer wall of the bearing ring 8 placed in the split positioning device 52 is limited by the axisymmetric semi-circular contours of the first through groove 523 and the second through groove 524, so that the center of the bearing ring 8 is aligned with the center relief hole 511. Then, place the annular middle mold 6, which contains the first spring 91 and the second spring 92, into the bearing ring 8. During the placement process, ensure that the first protrusion 611 is aligned with the first groove 5231 and the second protrusion 621 is aligned with the second groove 5241 to ensure that the middle mold 6 is aligned with the first groove 5231. The separation direction is completely consistent with the sliding direction of slider 521. The outer surface of the middle mold 6 is in contact with the inner wall of the bearing ring 8. During processing, the inverted frustum-shaped upper mold 7 is vertically pressed into the inner ring of the middle mold 6 from above. As the upper end of the upper mold 7 with a larger diameter gradually enters the middle mold 6, the first half mold 61 and the second half mold 62 of the middle mold 6 are separated from each other by radial expansion force. The first spring 91 and the second spring 92 are stretched, thereby making the outer diameter of the middle mold 6 uniformly increase. The bearing ring 8 tightly fitted on the outside of the middle mold 6 is precisely expanded into two symmetrical semicircles along the split positioning device 52. After removing the upper mold 7, the first spring 91 and the second spring 92 drive the first half mold 61 and the second half mold 62 to automatically reset. After removing the middle mold 7, the processed bearing ring 8 can be taken out from the split positioning device 52.

[0029] The scope of protection of the invention includes, but is not limited to, the above embodiments. The scope of protection of the invention is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of the invention.

Claims

1. A processing apparatus for a split-type head cup bearing, characterized in that, The device includes a bottom mold assembly, a middle mold, and an upper mold. The bottom mold assembly includes a base and a split positioning device. The split positioning device is disposed on the base and is used to ensure that the bearing ring to be processed is placed on the base. The middle mold is placed inside the bearing ring to be processed, and the outer surface of the middle mold is in contact with the bearing ring. The middle mold is annular and includes a first half mold and a second half mold. A deformation device is provided between the first half mold and the second half mold. The deformation device is used to reset the first half mold and the second half mold that are stretched apart by the upper mold. The splitting direction of the split positioning device is the same as the pulling direction of the deformation device. When the upper mold presses into the middle mold, the deformation device causes the middle mold to split the bearing ring to be processed into two semicircles.

2. The processing apparatus for a split-type head cup bearing as described in claim 1, characterized in that, The split positioning device includes a coaxial device, two sliders, and two slides. The base has a central clearance hole with a diameter larger than that of the upper mold. The two slides are respectively opened on both sides of the central clearance hole symmetrically. The two sliders have a first through groove and a second through groove respectively. The first through groove and the second through groove are axially symmetrical semicircles, and the radii of the first through groove and the second through groove are both larger than the radius of the central clearance hole. The coaxial device is used to ensure that the first through groove, the second through groove, and the central clearance hole are all located on the same axis.

3. The processing apparatus for a split-type head cup bearing as described in claim 2, characterized in that, The coaxial device includes a third spring, which is located in one of the two slides. One end of the third spring abuts against the rear wall of the slide and the other end abuts against the slider.

4. The processing apparatus for a split-type head cup bearing as described in claim 1, characterized in that, An anti-misalignment device is provided between the middle mold and the split positioning device. The anti-misalignment device is used to ensure that the splitting direction of the split positioning device is the same as the stretching direction of the deformation device.

5. The processing apparatus for a split-type head cup bearing as described in claim 4, characterized in that, The error prevention device includes a first protrusion, a second protrusion, a first groove, and a second groove. The first protrusion and the second protrusion are respectively disposed on the outer edges of the upper surfaces of the first half mold and the second half mold. The first groove and the second groove are respectively formed on the upper edges of the first through groove and the second through groove. The first protrusion corresponds to the first groove, and the second protrusion corresponds to the second groove.

6. The processing apparatus for a split-type head cup bearing as described in claim 4, characterized in that, The deformation device includes a first spring and a second spring. The first half-mold has a first mounting hole and a second mounting hole, and the second half-mold has a third mounting hole and a fourth mounting hole. The two ends of the first spring are respectively fixed in the first mounting hole and the third mounting hole, and the two ends of the second spring are respectively fixed in the second mounting hole and the fourth mounting hole.

7. The processing apparatus for a split-type head cup bearing as described in claim 1, characterized in that, The deformation device includes a first adhesive layer and a second adhesive layer. The first adhesive layer is fixed on the cut surface of the first half mold, and the second adhesive layer is fixed on the cut surface of the second half mold. When the middle mold is not in the processing state, the first adhesive layer and the second adhesive layer are bonded to each other. When the upper mold is pressed into the middle mold, the first adhesive layer and the second adhesive layer are separated from each other.

8. The processing apparatus for a split-type head cup bearing as described in claim 6, characterized in that, The upper mold is an inverted frustum shape. The diameter of the lower surface of the upper mold is smaller than the inner ring diameter of the middle mold, and the diameter of the upper surface of the upper mold is larger than the inner ring diameter of the middle mold. When the upper mold is gradually pressed down, the first spring and the second spring between the first half mold and the second half mold are stretched, causing the bearing ring to be processed outside the middle mold to be burst into two semicircles.

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