A connecting gear mold for pressing a structure with a retainer

Abstract

The utility model is specifically related to a kind of connecting gear mould of pressing with retainer structure, belong to mould technical field.The connecting gear mould of pressing with retainer structure includes upper die assembly, lower die assembly and positioning adjustment part.Lower die assembly is oppositely arranged with upper die assembly, and upper die assembly and lower die assembly are closed to make workpiece extrusion forming.Positioning adjustment part is located between upper die assembly and lower die assembly, and positioning adjustment part is configured to adjust thickness by grinding.On the one hand, grinding adjustment precision is high, and the error after adjustment is small, and then the control precision of workpiece processing thickness is improved.On the other hand, cutting force is small in grinding process, and the positioning adjustment part is deformed due to heat or stress by fine grinding wheel dressing, and then the risk of control precision of workpiece processing thickness is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically relating to a mold for pressing connecting gears with a protective ring structure. Background Technology

[0002] Some automotive limited-slip differentials include a connecting gear with a protective ring. This connecting gear is a face gear, with a protective ring surrounding the circumference of the end teeth. Additionally, a claw-like portion is provided on the back side of the end teeth. This connecting gear is manufactured using a forging process. First, the blank is hot-forged to create the basic outline of the connecting gear. After edge trimming and punching, it is finally cold-pressed into shape. After cold pressing, the claw-like portion and end teeth of the connecting gear are no longer machined. Therefore, during cold pressing, the thickness of the workpiece must be precisely controlled to ensure that the thickness meets requirements. In summary, how to improve the thickness during cold pressing is a technical problem that needs to be solved. Utility Model Content

[0003] The purpose of this invention is to provide a mold for pressing connecting gears with a protective ring structure, which can improve the accuracy of machining the thickness of the workpiece.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this utility model is as follows: This application provides a mold for pressing connecting gears with a retaining ring structure, including an upper mold assembly, a lower mold assembly, and a positioning adjustment part. The lower mold assembly is disposed opposite to the upper mold assembly, and the upper and lower mold assemblies are engaged to extrude and form the workpiece. The positioning adjustment part is disposed between the upper mold assembly and the lower mold assembly, and is configured to adjust the thickness by grinding.

[0005] In some embodiments, the upper die assembly includes a punch, a punch retaining ring, and a pressure applying member. The punch retaining ring is sleeved on the punch, and the inner peripheral wall of the punch retaining ring includes a first large-diameter section, a first transition section, and a first small-diameter section. The first small-diameter section is disposed on the side of the first transition section near the lower die assembly. The first transition section is frustoconical, and the punch includes a frustoconical peripheral wall adapted to the first transition section. The pressure applying member is movably connected to the punch retaining ring for applying pressure to the punch.

[0006] In some embodiments, the upper die assembly further includes an upper die ring, a punch retaining ring connected to the upper die ring, and the upper die ring sleeved on the pressure-applying component.

[0007] In some embodiments, the pressure-applying component includes a limiting ring, a central portion, and an upper pressure portion. The limiting ring is connected to the upper die ring, and its inner peripheral wall includes a second major diameter section, a second transition section, and a second minor diameter section, with the second minor diameter section disposed on the side of the second transition section near the lower die assembly. The limiting ring is fitted onto the central portion, which has a frustoconical peripheral wall adapted to the second transition section, and the central portion abuts against the punch. The upper pressure portion is disposed on the side of the limiting ring away from the lower die assembly, and abuts against the central portion.

[0008] In some embodiments, the upper die assembly further includes an upper ejector component, which includes an upper ejector punch, an elastic element, and an upper ejector rod. The upper ejector punch is disposed along a direction in which the upper die assembly and the lower die assembly are positioned opposite each other, and the punch has a first through hole in which it is received. The elastic element provides an elastic force to move the upper ejector punch away from the lower die assembly, and the upper ejector rod is connected to the upper ejector punch, partially protruding from the side of the pressing component away from the lower die assembly.

[0009] In some embodiments, the lower mold assembly includes a die cavity having a cavity.

[0010] In some embodiments, the positioning adjustment part is connected to the die cavity.

[0011] In some embodiments, the lower die assembly further includes a lower pressure portion disposed on the side of the die cavity away from the upper die assembly.

[0012] In some embodiments, the lower mold assembly further includes a lower ejector pin. Along the direction in which the upper mold assembly and the lower mold assembly are disposed opposite to each other, the die is provided with a sliding hole, the lower ejector pin is inserted into the sliding hole, the die is provided with a plurality of lower ejector holes at intervals along the circumference, the lower ejector holes are connected to the cavity, and the lower ejector pin is provided with a plurality of ejector parts corresponding to the lower ejector holes, the ejector parts being inserted into the lower ejector holes.

[0013] In some embodiments, the lower pressure part is provided with a second through hole, which communicates with the sliding hole, and the lower push rod passes through the second through hole and is partially disposed on the side of the lower pressure part away from the upper mold assembly.

[0014] This utility model has the following beneficial effects:

[0015] The positioning and adjustment unit adjusts the thickness through grinding. On the one hand, grinding offers high precision and minimizes the error after adjustment, thereby improving the control accuracy of the workpiece machining thickness. On the other hand, the cutting force during grinding is small, and the fine dressing of the grinding wheel reduces the deformation of the positioning and adjustment unit due to heat or stress, thus reducing the risk to the control accuracy of the workpiece machining thickness. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connecting gear that needs to be machined.

[0017] Figure 2This is a structural schematic diagram of the connecting gear mold with a pressing and protective ring structure according to this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A;

[0019] Figure 4 for Figure 2 Enlarged view of point B.

[0020] Icon labels:

[0021] 1-Connecting gear, 2-Guarding ring, 3-End tooth, 4-Claw part, 5-Upper mold assembly, 6-Lower mold assembly, 7-Positioning adjustment part, 8-Punch, 9-Punch fixing ring, 10-Punch fixing ring, 11-Limiting ring, 12-Intermediate part, 13-Pressure application part, 14-Upper mold ring, 15-Upper ejector, 16-Elastic element, 17-Upper ejector rod, 18-Die, 19-Lower pressure part, 20-Lower ejector rod, 21-Pushing part, 22-Lower mold ring, 23-First small diameter section, 24-First transition section, 25-First large diameter section, 26-Second small diameter section, 27-Second transition section, 28-Second large diameter section. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0023] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] This application provides a die for pressing a connecting gear 1 with a retaining ring 2, including an upper die assembly 5, a lower die assembly 6, and a positioning adjustment part 7. The lower die assembly 6 is disposed opposite to the upper die assembly 5, and the upper die assembly 5 and the lower die assembly 6 are engaged to extrude and form the workpiece. The positioning adjustment part 7 is disposed between the upper die assembly 5 and the lower die assembly 6, and the positioning adjustment part 7 is configured to adjust the thickness by grinding.

[0025] The mold in this embodiment can be applied to a press. The lower mold assembly 6 is installed on the working plate of the press, and the pressure end of the press applies pressure to the upper mold assembly 5, so that the upper mold assembly 5 and the lower mold assembly 6 can cooperate to extrude the workpiece.

[0026] The mold in this application embodiment can be used to process the connecting gear 1 in the background art.

[0027] The positioning adjustment part 7 is disposed between the upper mold assembly 5 and the lower mold assembly 6, and is used to adjust the distance between the upper mold assembly 5 and the lower mold assembly 6 after they are engaged, so that the processing thickness of the workpiece can be adjusted.

[0028] The positioning adjustment unit 7 adjusts the thickness through grinding. On the one hand, the grinding adjustment has high precision and small error after adjustment, thereby improving the control accuracy of the workpiece machining thickness. On the other hand, the cutting force during grinding is small, and the fine dressing of the grinding wheel reduces the deformation of the positioning adjustment unit 7 due to heat or stress, thereby reducing the risk of the positioning adjustment unit 7 deforming due to heat or stress.

[0029] In some embodiments, the upper die assembly 5 includes a punch 8, a punch 8 retaining ring, and a pressure applying member 13. The punch 8 retaining ring is sleeved on the punch 8. The inner peripheral wall of the punch 8 retaining ring includes a first large diameter section 25, a first transition section 24, and a first small diameter section 23. The first small diameter section 23 is disposed on the side of the first transition section 24 near the lower die assembly 6. The first transition section 24 is frustoconical in shape. The punch 8 includes a frustoconical peripheral wall adapted to the first transition section 24. The pressure applying member 13 is movably connected to the punch 8 retaining ring for applying pressure to the punch 8.

[0030] The positioning adjustment part 7 can abut against the fixing ring of the punch 8 to limit the distance between the punch 8 and the lower die assembly 6.

[0031] The retaining ring of the punch 8 is sleeved on the punch 8, so that the punch 8 can move relative to the retaining ring of the punch 8.

[0032] The shape of the outer peripheral wall of the punch 8 can be adapted to the shape of the inner peripheral wall of the punch 8 retaining ring.

[0033] The pressure end of the press applies pressure to the pressure application component 13, thereby causing the pressure application component 13 to apply pressure to the punch 8, and the punch 8 can cooperate with the lower die assembly 6 to process the workpiece.

[0034] The first large diameter section 25 allows the dimension of the side of the punch 8 that contacts the pressure-applying component 13 to be set larger, thus ensuring the structural strength of the punch 8.

[0035] The frustoconical peripheral wall of the punch 8 engages with the first transition section 24 to limit the distance the punch 8 moves relative to the fixed ring of the punch 8. At the same time, the frustoconical structure of the first transition section 24 reduces the risk of damage due to stress concentration when the frustoconical peripheral wall and the first transition section 24 come into contact.

[0036] In some embodiments, the upper mold assembly 5 further includes an upper mold ring 14, a punch 8 retaining ring connected to the upper mold ring 14, and the upper mold ring 14 sleeved on the pressure application member 13.

[0037] The upper die ring 14 is fitted onto the pressure-applying component 13, allowing the pressure-applying component 13 to move relative to the upper die ring 14.

[0038] In some embodiments, the pressure-applying component 13 includes a limiting ring 11, a central portion 12, and an upper pressure portion. The limiting ring 11 is connected to the upper die ring 14. The inner peripheral wall of the limiting ring 11 includes a second large diameter section 28, a second transition section 27, and a second small diameter section 26. The second small diameter section 26 is disposed on the side of the second transition section 27 near the lower die assembly 6. The limiting ring 11 is fitted onto the central portion 12, which has a frustoconical peripheral wall adapted to the second transition section 27. The central portion 12 abuts against the punch 8. The upper pressure portion is disposed on the side of the limiting ring 11 away from the lower die assembly 6 and abuts against the central portion 12.

[0039] The inner peripheral wall of the upper mold ring 14 may be provided with a limiting boss, and the limiting ring 11 abuts against the limiting boss to limit the position of the limiting ring 11 in the axial direction of the upper mold ring 14.

[0040] The limiting ring 11 is fitted onto the middle part 12, allowing the middle part 12 to move relative to the limiting ring 11. The limiting ring 11 and the upper mold ring 14 cooperate to improve the movement accuracy of the middle part 12.

[0041] The pressure end of the press acts on the upper pressure section, which applies pressure to the middle section 12, thereby allowing the middle section 12 to apply pressure to the punch 8.

[0042] The second large diameter section 28 allows for a larger dimension on the side of the middle part 12 that contacts the upper pressure part, thus ensuring the structural strength of the middle part 12.

[0043] The frustum-shaped peripheral wall of the intermediate portion 12 and the second transition section 27 cooperate to limit the distance the intermediate portion 12 moves relative to the limiting ring 11. At the same time, the frustum-shaped structure of the second transition section 27 reduces the risk of damage due to stress concentration when the frustum-shaped peripheral wall of the intermediate portion 12 comes into contact with the first transition section 24.

[0044] In some embodiments, the upper die assembly 5 further includes an upper ejector component, which includes an upper ejector punch 15, an elastic element 16, and an upper ejector rod 17. The upper ejector punch 15 is disposed in a direction in which the upper die assembly 5 and the lower die assembly 6 are disposed opposite each other, and the punch 8 is provided with a first through hole in which the upper ejector punch 15 is received. The elastic element 16 is used to provide an elastic force to move the upper ejector punch 15 away from the lower die assembly 6, and the upper ejector rod 17 is connected to the upper ejector punch 15, and the upper ejector rod 17 partially protrudes from the side of the pressure application member 13 away from the lower die assembly 6.

[0045] The upper ejector 15 is accommodated in the first through hole, allowing the upper ejector 15 to move relative to the punch 8.

[0046] The elastic element 16 can be a spring. The elastic element 16 is connected to the upper ejector 15 and the punch 8, so that when pressing the workpiece, the upper ejector 15 does not protrude from the bottom plane of the punch 8 and will not affect the forming of the workpiece.

[0047] The upper ejector rod 17 is used to drive the upper ejector punch 15 to move. After the pressing is completed, the upper ejector rod 17 moves down under the drive of the feeding mechanism of the press, and then the upper ejector punch 15 moves down, so that the workpiece can be separated from the punch 8.

[0048] In some embodiments, the lower mold assembly 6 includes a cavity 18.

[0049] The specific shapes of the cavity and the punch 8 can be designed as needed. For example, the cavity can be used to form the claw 4 of the connecting gear 1, and the punch 8 can be used to form the teeth of the connecting gear 1.

[0050] The die 18 is used to hold the workpiece. The punch 8 and the die 18 cooperate to allow the workpiece to be pressed into the designed shape.

[0051] In some embodiments, the positioning adjustment part 7 is connected to the die cavity 18.

[0052] For example, the positioning adjustment part 7 can be bolted to the die cavity 18.

[0053] The positioning adjustment part 7 is connected to the die cavity 18 to facilitate fixing the position of the positioning adjustment part 7.

[0054] In some embodiments, the lower mold assembly 6 further includes a lower pressure portion 19, which is disposed on the side of the die cavity 18 away from the upper mold assembly 5.

[0055] The lower pressure section 19 is used to provide a reaction force to the die 18 during the pressing process.

[0056] The lower mold assembly 6 may also include a lower mold ring 22, a lower pressure part 19 connected to the lower mold ring 22, the lower mold ring 22 sleeved on the die 18, the outer peripheral wall of the die 18 may be provided with a notch, the opening of the notch faces the upper mold assembly 5, the lower mold ring 22 may be bolted to a fixing block, the fixing block abuts against the bottom wall inside the notch and opposite to the opening, so that the lower mold ring 22, the lower pressure part 19 and the die 18 can form an integral structure.

[0057] In some embodiments, the lower mold assembly 6 further includes a lower ejector rod 20. Along the direction in which the upper mold assembly 5 and the lower mold assembly 6 are arranged opposite to each other, the die 18 is provided with a sliding hole, the lower ejector rod 20 is inserted into the sliding hole, the die 18 is provided with a plurality of lower ejector holes at intervals along the circumference, the lower ejector holes are connected to the cavity, and the lower ejector rod 20 is provided with a plurality of push parts 21 corresponding to the lower ejector holes, the push parts 21 are inserted into the lower ejector holes.

[0058] The lower push rod 20 is inserted into the sliding hole, so that the lower push rod 20 can move relative to the sliding hole, and thus the push part 21 connected to the lower push rod 20 can also move together.

[0059] The pusher 21 is used to apply force to the workpiece so that the workpiece can be separated from the die 18 after pressing.

[0060] When using the connecting gear 1 in the mold processing background technology of this application embodiment, since the connecting gear 1 is a hollow ring structure, the workpiece cannot be pushed from the middle of the connecting gear 1.

[0061] By setting multiple push parts 21 and arranging them at circumferential intervals, the push parts 21 can contact the connecting gear 1, and the connecting gear 1 can be subjected to uniform force, thereby enabling the connecting gear 1 to disengage from the die 18.

[0062] For hollow cold-pressed workpieces, the method of ejecting the workpiece through the push part 21 can avoid the risk of the workpiece being unable to be ejected and unable to be demolded compared with the ordinary middle ejection method.

[0063] In some embodiments, the lower pressure part 19 is provided with a second through hole, which communicates with the sliding hole, and the lower push rod 20 passes through the second through hole and is partially disposed on the side of the lower pressure part 19 away from the upper mold assembly 5.

[0064] The lower ejector rod 20 is partially located on the side of the lower pressure part 19 away from the upper mold assembly 5, so as to facilitate the movement of the lower ejector rod 20 from the outside, so as to control the ejector part 21 to perform demolding operation on the workpiece.

[0065] The drive structure of the lower push rod 20 can be selected from the existing technology, and will not be described in detail here.

[0066] It should be noted that the technical solution of this application only involves the improvement of the mold, and does not involve the improvement of the structure of the press adapted to the mold. The structure and working principle of the press are well known to those skilled in the art. In specific implementation, those skilled in the art can select the appropriate model of press as needed. How the mold is fixed on the press and the working process of the press are also well known to those skilled in the art, so they will not be described in detail here.

[0067] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A mold for pressing connecting gears with a retaining ring structure, characterized in that, include: Upper mold component (5); The lower die assembly (6) is disposed opposite to the upper die assembly (5), and the upper die assembly (5) and the lower die assembly (6) are engaged to extrude and form the workpiece; A positioning adjustment part (7) is disposed between the upper mold assembly (5) and the lower mold assembly (6), and the positioning adjustment part (7) is configured to adjust the thickness by grinding.

2. The connecting gear mold with a retaining ring structure according to claim 1, characterized in that, The upper mold assembly (5) includes: punch (8); A punch retaining ring (9) is sleeved on the punch (8). The inner peripheral wall of the punch retaining ring (9) includes a first large diameter section (25), a first transition section (24) and a first small diameter section (23). The first small diameter section (23) is disposed on the side of the first transition section (24) close to the lower die assembly (6). The first transition section (24) is frustoconical. The punch (8) includes a frustoconical peripheral wall adapted to the first transition section (24). The pressure-applying component (13) is movably connected to the punch retaining ring (9) for applying pressure to the punch (8).

3. The mold for pressing connecting gears with a retaining ring structure according to claim 2, characterized in that, The upper mold assembly (5) also includes an upper mold ring (14), the punch fixing ring (9) is connected to the upper mold ring (14), and the upper mold ring (14) is sleeved on the pressure application component (13).

4. The connecting gear mold with a retaining ring structure according to claim 3, characterized in that, The pressure-applying component (13) includes: A limiting ring (11) is connected to the upper mold ring (14). The inner peripheral wall of the limiting ring (11) includes a second large diameter section (28), a second transition section (27), and a second small diameter section (26). The second small diameter section (26) is located on the side of the second transition section (27) close to the lower mold assembly (6). The middle part (12) is fitted with the limiting ring (11), the middle part (12) is provided with a frustum peripheral wall adapted to the second transition section (27), and the middle part (12) abuts against the punch (8). The upper pressure part is located on the side of the limiting ring (11) away from the lower mold assembly (6), and the upper pressure part abuts against the middle part (12).

5. The mold for pressing connecting gears with a retaining ring structure according to claim 2, characterized in that, The upper mold assembly (5) further includes an upper pusher component, which includes: The upper ejector punch (15) is arranged in a direction in which the upper die assembly (5) and the lower die assembly (6) are arranged opposite to each other. The punch (8) is provided with a first through hole, and the upper ejector punch (15) is accommodated in the first through hole. An elastic element (16) is used to provide an elastic force that causes the upper ejector (15) to move away from the lower die assembly (6); An upper ejector rod (17) is connected to the upper ejector punch (15), and the upper ejector rod (17) protrudes partially from the side of the pressure-applying component (13) away from the lower die assembly (6).

6. The connecting gear mold with a retaining ring structure according to claim 1, characterized in that, The lower mold assembly (6) includes a cavity (18) having a cavity.

7. The mold for pressing connecting gears with a retaining ring structure according to claim 6, characterized in that, The positioning adjustment part (7) is connected to the die (18).

8. The mold for pressing connecting gears with a retaining ring structure according to claim 6, characterized in that, The lower mold assembly (6) further includes a lower pressure part (19), which is disposed on the side of the die (18) away from the upper mold assembly (5).

9. The connecting gear mold with a retaining ring structure according to claim 8, characterized in that, The lower mold assembly (6) also includes a lower ejector rod (20). Along the direction in which the upper mold assembly (5) and the lower mold assembly (6) are arranged opposite to each other, the die (18) is provided with a sliding hole, the lower ejector rod (20) is inserted into the sliding hole, the die (18) is provided with a plurality of lower ejector holes at intervals along the circumference, the lower ejector holes are connected to the cavity, and the lower ejector rod (20) is provided with a plurality of push parts (21) corresponding to the lower ejector holes, the push parts (21) are inserted into the lower ejector holes.

10. The connecting gear mold with a retaining ring structure according to claim 9, characterized in that, The lower pressure part (19) is provided with a second through hole, which communicates with the sliding hole. The lower push rod (20) passes through the second through hole and is partially disposed on the side of the lower pressure part (19) away from the upper mold assembly (5).

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