Bicycle crankset punch forming device

Abstract

A bicycle crankset punch forming device comprises an upper die, a lower die and a feeding mechanism, the upper die and the lower die are vertically and correspondingly arranged, the feeding mechanism is arranged between the upper die and the lower die, punching holes are formed in the lower die, punching parts are arranged on the lower portion of the upper die and correspond to the punching holes in a one-to-one mode, and a material frame is arranged on the right side of the feeding mechanism and used for containing material pieces. The feeding mechanism comprises a guide block and an electromagnet which are arranged corresponding to the upper die and the lower die respectively, the guide block and the electromagnet are both installed at one end of a transverse rod, the other end of the transverse rod is connected with a rotary straight-moving air cylinder, and the material frame and the lower die are symmetrically arranged with the rotary straight-moving air cylinder as the center. In the working process, the electromagnet is used for attracting material pieces on the material frame after being electrified, then the cross rod drives the electromagnet to rotate to the position above the lower die, after the electromagnet loses power, the material pieces automatically fall onto the lower die to complete feeding, and the punched material pieces are discharged along the guide block. According to the device, the feeding process and the discharging process are completed at the same time by arranging the rotary feeding mechanism, manual operation is replaced with a mechanical structure, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle sprocket stamping forming device. BACKGROUND

[0002] The sprocket is the part connecting the bicycle axle and the crank. People drive the crank by pedaling, and then drive the rotation of the sprocket, finally drive the rear wheel to rotate through the chain and the freewheel, provide power, complete the operation of the bicycle. In order to reduce the weight of the sprocket itself and reduce the production cost, a plurality of through holes are punched on the sprocket. In the existing stamping process, feeding and discharging are usually operated manually, which not only has low efficiency, but also has safety hazards. SUMMARY

[0003] In view of the above problems, the utility model provides a bicycle sprocket stamping forming device.

[0004] In order to achieve the above purpose, the utility model provides a bicycle sprocket stamping forming device, which comprises an upper die, a lower die arranged correspondingly above and below, a feeding mechanism arranged between the upper die and the lower die, a stamping hole arranged on the lower die, a stamping part arranged on the lower part of the upper die corresponding to the stamping hole, and a material rack arranged on the right side of the feeding mechanism for placing a material sheet.

[0005] The feeding mechanism comprises a guide block and an electromagnet arranged correspondingly to the upper die and the lower die, the guide block and the electromagnet are both installed on one end of a horizontal rod, the other end of the horizontal rod is connected with a rotary straight cylinder, and the material rack and the lower die are symmetrically arranged around the rotary straight cylinder.

[0006] As a further improvement of the utility model, a discharging guide plate is obliquely arranged on the left side of the lower die, an inclined surface is arranged on the upper part of the guide block, and when the horizontal rod drives the guide block to rotate to the position directly below the upper die, the inclined surface is consistent with the inclined direction of the discharging guide plate.

[0007] As a further improvement of the utility model, the side of the material rack facing the rotary straight cylinder and the upper part of the material rack are open.

[0008] As a further improvement of the utility model, an integral positioning column is arranged at the center of the lower die and matched with the center hole of the material sheet.

[0009] As a further improvement of the utility model, the electromagnet is in a ring structure, a limiting rod is arranged on the inner side of the electromagnet and the bottom of the horizontal rod, the outer diameter of the limiting rod is matched with the center hole, and the height of the limiting rod extending out of the electromagnet is matched with the thickness of the material sheet.

[0010] As a further improvement of the utility model, the lower mould is internally provided with a waste groove, the waste groove extends to one side of the lower mould to form an opening, and the stamping hole is in communication with the waste groove.

[0011] As a further improvement of the utility model, the upper mould is provided below with an annular pressing block, the upper part of the annular pressing block is connected with the upper mould through elastic extension rods, an axial guide hole is processed in the annular pressing block, and the guide hole is correspondingly arranged with the stamping piece.

[0012] As a further improvement of the utility model, the lower mould and the rotating straight-line cylinder are both mounted on the workbench.

[0013] The utility model has the advantages of:

[0014] The device simultaneously completes the feeding and discharging processes through the rotary feeding mechanism, the material sheet on the material rack is adsorbed after the electromagnet is electrified, then the horizontal rod drives the electromagnet to rotate to the upper side of the lower mould, the material sheet automatically falls to the lower mould to complete the feeding after the electromagnet is deenergized, and the material sheet after stamping falls to the guide block and is discharged along the inclined surface of the guide block, so that the mechanical structure is adopted to replace manual operation, the working efficiency is improved, and the safety hidden danger is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view of the bicycle tooth disc stamping forming device of the utility model;

[0016] Figure 2 It is a top view of the lower mould 2;

[0017] Figure 3 It is a top view of the material rack 7;

[0018] Figure 4 It is a working schematic of the bicycle tooth disc stamping forming device of the utility model Figure 1 ;

[0019] Figure 5 It is a working schematic of the bicycle tooth disc stamping forming device of the utility model Figure 2 ;

[0020] Figure 6 It is a working schematic of the bicycle tooth disc stamping forming device of the utility model Figure 3 ;

[0021] Figure 7 It is a structure diagram of the material sheet 6 before stamping;

[0022] Figure 8 It is a structure diagram of the material sheet 6 after stamping.

[0023] In the figure: 1, workbench; 2, lower die; 21, positioning column; 22, stamping hole; 23, waste groove; 3, discharge guide plate; 4, upper die; 41, annular pressing block; 411, guide hole; 42, elastic telescopic rod; 43, stamping part; 5, feeding mechanism; 51, cross rod; 52, guide block; 521, inclined surface; 53, limiting rod; 54, electromagnet; 55, rotary straight cylinder; 6, sheet; 61, center hole; 62, through hole; 7, rack. DETAILED DESCRIPTION

[0024] As Figure 1 shown in the utility model embodiment, the device comprises upper die 4 and lower die 2 arranged correspondingly, feeding mechanism 5 arranged between upper die 4 and lower die 2, stamping hole 22 arranged on lower die 2, stamping part 43 arranged on the lower part of upper die 4 corresponding to stamping hole 22, stamping part 43 cooperating with stamping hole 22 to stamp through hole 62 on sheet 6, waste groove 23 arranged in lower die 2, waste groove 23 extending to one side of lower die 2 to form an opening, stamping hole 22 being communicated with waste groove 23, rack 7 arranged on the right of feeding mechanism 5 for placing sheet 6, positioning column 21 arranged at the center of lower die 2 and matched with center hole 61 of sheet 6, discharge guide plate 3 arranged on the left side of lower die 2 in an inclined manner, annular pressing block 41 arranged below upper die 4, elastic telescopic rod 42 connecting upper die 4 on the upper part of annular pressing block 41, guide hole 411 axially machined in annular pressing block 41, guide hole 411 being arranged corresponding to stamping part 43.

[0025] Feeding mechanism 5 comprises guide block 52 and electromagnet 54 arranged corresponding to upper die 4 and lower die 2 respectively, guide block 52 and electromagnet 54 being mounted on one end of cross rod 51, electromagnet 54 being annular structure, limiting rod 53 being arranged on the inner side of electromagnet 54 and the bottom of cross rod 51, the outer diameter of limiting rod 53 being matched with center hole 61, the height of limiting rod 53 extending out of electromagnet 54 being matched with the thickness of sheet 6, rotary straight cylinder 55 being connected to the other end of cross rod 51, rack 7 and lower die 2 being arranged symmetrically with rotary straight cylinder 55 as the center, lower die 2 and rotary straight cylinder 55 being mounted on workbench 1, inclined surface 521 being machined on the upper part of guide block 52, the inclined direction of inclined surface 521 being consistent with discharge guide plate 3 when cross rod 51 drives guide block 52 to rotate to the position directly below upper die 4, the side of rack 7 facing rotary straight cylinder 55 and the upper opening of rack 7.

[0026] The device completes the feeding and discharging processes simultaneously by setting rotary feeding mechanism, adsorbs sheet on the rack by using electromagnet after electrification, then cross rod drives electromagnet to rotate to the position above lower die, sheet automatically falls to lower die to complete feeding after electromagnet loses electricity, and the stamped sheet falls to guide block and is discharged along the inclined surface of guide block, so that manual operation is replaced by mechanical structure, work efficiency is improved, and safety hazards are eliminated.

[0027] In particular use, for the convenience of understanding the utility model, the following description is made in conjunction with the drawings.

[0028] When working, the electromagnet at the end of the horizontal rod is rotated to the upper side of the rack by the rotating straight cylinder, and the material sheet is stacked and placed in the rack, then the rotating straight cylinder drives the whole horizontal rod to move downward until the limiting rod at the lower part of the horizontal rod extends into the center hole of the material sheet, the electromagnet in the electrified state adsorbs and positions the uppermost material sheet, then the electromagnet and the material sheet move upward with the horizontal rod and rotate to the upper side of the lower die, the electromagnet loses power, the material sheet falls onto the lower die to complete the feeding, the positioning column in the middle of the lower die extends into the center hole of the material sheet to limit the radial movement of the material sheet, and the electromagnet rotates to the upper side of the rack with the horizontal rod to adsorb the next material sheet; the upper die moves downward, the annular pressing block first presses the material sheet tightly, the stamping part at the bottom of the upper die cooperates with the stamping hole on the lower die to stamp a through hole on the material sheet, the waste formed by stamping falls into the waste groove, after stamping is completed, the upper die moves upward to reset, because there is friction between the stamping part and the through hole of the material sheet, the stamping part will carry the material sheet upward during the upward movement, until the annular pressing block pushes the material sheet out of the stamping part by the elastic force of the elastic extension rod, there is a time difference in the middle, before the material sheet falls, the electromagnet with the material sheet is rotated to the upper side of the lower die by the horizontal rod to complete the feeding again, and the material sheet after stamping falls onto the guide block at the upper part of the horizontal rod, and then slides along the inclined surface at the upper part of the guide block to the discharge guide plate to complete the discharging.

[0029] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model, for those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A bicycle chainring stamping forming device, characterized in that: It includes an upper mold (4) and a lower mold (2) arranged correspondingly on the top and bottom, and a feeding mechanism (5) located between the upper mold (4) and the lower mold (2). The lower mold (2) is provided with a stamping hole (22). The lower part of the upper mold (4) is provided with a stamping part (43) that corresponds one-to-one with the stamping hole (22). The feeding mechanism (5) is provided with a material rack (7) on the right side for placing the material sheet (6). The feeding mechanism (5) includes a guide block (52) and an electromagnet (54) respectively corresponding to the upper mold (4) and the lower mold (2). The guide block (52) and the electromagnet (54) are both installed at one end of the crossbar (51). The other end of the crossbar (51) is connected to a rotary linear cylinder (55). The material rack (7) and the lower mold (2) are arranged symmetrically with the rotary linear cylinder (55) as the center.

2. The bicycle chainring stamping and forming device according to claim 1, characterized in that: The lower mold (2) is obliquely mounted on the left side of the discharge guide plate (3). The upper part of the guide block (52) is machined with an inclined surface (521). When the crossbar (51) drives the guide block (52) to rotate to the position directly below the upper mold (4), the inclined surface (521) is in the same direction as the discharge guide plate (3).

3. The bicycle chainring stamping and forming device according to claim 1, characterized in that: The material rack (7) has an opening on one side facing the rotary linear cylinder (55) and an upper opening.

4. The bicycle chainring stamping and forming device according to claim 1, characterized in that: The lower mold (2) has an integrated positioning post (21) at its center that matches the center hole (61) of the sheet material (6).

5. The bicycle chainring stamping and forming device according to claim 4, characterized in that: The electromagnet (54) has a ring structure. A limiting rod (53) is provided on the inner side of the electromagnet (54) and at the bottom of the crossbar (51). The outer diameter of the limiting rod (53) matches the center hole (61), and the height of the limiting rod (53) extending out of the electromagnet (54) matches the thickness of the sheet (6).

6. The bicycle chainring stamping and forming device according to claim 1, characterized in that: The lower die (2) is provided with a waste material groove (23), which extends to one side of the lower die (2) to form an opening, and the stamping hole (22) is connected to the waste material groove (23).

7. The bicycle chainring stamping and forming device according to claim 1, characterized in that: An annular pressure block (41) is provided below the upper mold (4). The upper part of the annular pressure block (41) is connected to the upper mold (4) through an elastic telescopic rod (42). An axial guide hole (411) is machined inside the annular pressure block (41), and the guide hole (411) is correspondingly set with the stamping part (43).

8. The bicycle chainring stamping and forming device according to claim 1, characterized in that: Both the lower mold (2) and the rotary linear cylinder (55) are mounted on the worktable (1).

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