A device for stamping and forming electric bicycle accessories

Abstract

The invention relates to the technical field of stamping of bicycle accessories, and in particular to a device for stamping and forming electric bicycle accessories, which is used for stamping bicycle brake pads, and comprises an upper mold which moves vertically, a lower mold corresponding to the upper mold is provided below the upper mold, the upper mold comprises a stamping rod corresponding to a hole of the brake pad, the lower mold comprises a stamping die which carries the brake pad and cooperates with the stamping rod, the lower mold comprises a box body, a disc rotatably connected to the top of the box body, a grinding sheet fixedly connected to the top of the disc, a center column fixedly connected inside the box body, and a power component for controlling the lifting and rotation of the disc, the stamping die comprises a first bearing block fixed to the top of the outer circumferential surface of the center column, a second bearing block fixed to the top of the box body, a first sinking groove opened at the top of the first bearing block, a second sinking groove opened at the top of the second bearing block, a third sinking groove opened at the top of the disc, and a through hole opened in the third sinking groove corresponding to the hole of the brake pad.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle accessory stamping, and in particular to a device for stamping and forming electric bicycle accessories. Background Art

[0002] Bicycle accessories are a general term for all parts and accessories of a bicycle. According to the large structural framework of the bicycle, they can be divided into several categories: frame, tire, pedal parts, front fork assembly, chain, flywheel, brake pads, etc. Brake pads are stamped out of metal discs using stamping equipment to stamp out brake pads with holes and patterns. During the stamping process, due to the elastic deformation of the material and the effect of cutting force, burrs are often easily formed on the edges of the parts. This is a normal phenomenon. After the brake pads are stamped out, burrs will appear at the bottom of the holes. Generally, it is necessary to manually use a file, or use abrasives, grinding cloths, manual grinding and other tools to repair the burrs of the stamping die, which requires a lot of labor for workers.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0004] The purpose of the present invention is to design a device that does not require manual labor to remove burrs on brake pads. The burrs on brake pads can be automatically removed after stamping is completed, without the need for manual removal, so as to solve the above-mentioned shortcomings in the technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for stamping and forming electric bicycle accessories, used for stamping bicycle brake pads, comprising an upper mold that moves vertically, a lower mold corresponding to the upper mold is provided below the upper mold, the upper mold comprises a stamping rod corresponding to the brake pad hole, the lower mold comprises a stamping die that carries the brake pad and cooperates with the stamping rod, the lower mold comprises a box body, a disc rotatably connected to the top of the box body, a grinding sheet fixedly connected to the top of the disc, a center column fixedly connected inside the box body, and a power assembly for controlling the lifting and rotation of the disc, the stamping die comprises a first bearing block fixed to the top of the outer circumferential surface of the center column, a second bearing block fixed to the top of the box body, a first sinking groove opened at the top of the first bearing block, a second sinking groove opened at the top of the second bearing block, a third sinking groove opened at the top of the disc, and a through hole opened in the third sinking groove corresponding to the brake pad hole, the sum of the shapes of the first sinking groove, the second sinking groove and the third sinking groove is a circle, and the diameter of the circle is the same as the diameter of the brake pad;

[0006] The disc is driven down by the power assembly and then rotated back and forth, so that the burrs on both sides of the grinding disc are scraped and bent back and forth to produce metal fatigue. At the same time, the burrs in the through hole are bent downward from a horizontal state with the intermittently descending punch rod to produce metal fatigue. Large burrs are broken off by metal fatigue, and then the top of the grinding disc is gradually fitted and rotated with the brake pad from bottom to top to gradually grind off the remaining fine burrs.

[0007] Preferably, the depths of the first sunken groove, the second sunken groove and the third sunken groove are the same as the thickness of the brake pad. The same thickness makes it convenient for the brake pad to not run out of the first sunken groove when the grinding sheet squeezes the burrs and deforms them in the first sunken groove and the second sunken groove.

[0008] Preferably, the grinding sheet is shaped as an incomplete circular ring, and the third sink groove is located between the two ends of the grinding sheet. The grinding sheet is designed as an incomplete circular ring in order to utilize its side wall to squeeze out burrs without affecting the placement and stamping of the brake pad.

[0009] Preferably, the power assembly includes a hydraulic cylinder fixedly connected to the inner cavity of the casing, a chassis fixedly installed at the output end of the hydraulic cylinder, a hollow column and a servo motor fixedly connected to the chassis, a bearing fixedly installed at the top of the hollow column, an outer gear ring fixedly installed at the top of the bearing, and a gear fixedly installed at the end of the output shaft of the servo motor, the gear is meshed with the outer gear ring, the chassis, hollow column, bearing and outer gear ring are all penetrated by the center column and slidably connected, and the outer gear ring is fixedly connected to the bottom surface of the disc.

[0010] Preferably, the upper mold includes a mounting seat, a limiting rod passing through the mounting seat, a pressing plate fixedly connected to the bottom end of the limiting rod, and a spring disposed outside the limiting rod, and the punching rod is installed on the bottom surface of the mounting seat.

[0011] Preferably, the pressing plate is set to be annular, the pressing plate does not overlap with the through hole, and the outer diameter of the pressing plate matches the outer diameter of the brake pad, ensuring that the pressing plate presses the brake pad into the first sinking groove and the second sinking groove without affecting the stamping of the stamping rod.

[0012] Preferably, the side surfaces formed at both ends of the grinding sheet are perpendicular to the central axis of the central column, so that when the grinding sheet rotates, the debris on the side of the grinding sheet will be thrown out along the side of the grinding sheet by centrifugal force.

[0013] Preferably, the through hole includes an upper hole and a lower hole, the size of the lower hole is 1.1-1.3 times that of the upper hole, the upper hole cooperates with the punching rod to punch out the required holes on the brake pad, and the lower hole facilitates the punched metal to fall out.

[0014] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0015] This product uses the cooperation between the stamping rod and the reciprocating grinding disc to make the burrs on the brake pads after stamping bend back and forth, causing the burrs to break after metal fatigue, thereby achieving the purpose of automatically removing the burrs on the brake pads after stamping;

[0016] This product first bends the burrs back and forth, so that most of the burrs are broken. The remaining burrs will also become weaker due to metal fatigue and are easily pushed and torn off by the rotating grinding sheet that is close to the bottom of the brake pad;

[0017] By fitting the grinding sheet to the bottom surface of the brake pad and rotating it, the top of the grinding sheet can be used to rub and grind the bottom surface of the brake pad to make the bottom surface of the brake pad smooth;

[0018] This product can also adjust the number of reciprocating swings of the grinding disc, thereby increasing the number of reciprocating bends of the burr, so that most of the burrs will first fatigue and then break according to the different properties of the brake pad material;

[0019] Through the cooperation between the punching rod and the grinding disc, this product can remove burrs around small holes that cannot be reached by the file. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 A three-dimensional diagram of the upper mold of the present invention;

[0023] Figure 3 A three-dimensional diagram of the lower mold of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the box body of the present invention;

[0025] Figure 5 It is a schematic diagram of the bottom structure of the disc of the present invention;

[0026] Figure 6 It is a schematic diagram of the connection between the disc, the first bearing block and the second bearing block of the present invention.

[0027] Description of reference numerals:

[0028] 1. Upper mold; 1a. Punching rod; 1b. Mounting seat; 1c. Limit rod; 1d. Pressing plate; 1e. Spring; 2. Lower mold; 2a. Punching die; 2a1. First bearing block; 2a2. Second bearing block; 2a3. First sinking groove; 2a4. Second sinking groove; 2a5. Third sinking groove; 2a6. Through hole; 2a61. Upper hole; 2a62. Lower hole; 2b. Box; 2c. Disc; 2d. Grinding sheet; 2e. Center column; 2f. Power assembly; 2f1. Hydraulic cylinder; 2f2. Chassis; 2f3. Hollow column; 2f4. Servo motor; 2f5. Bearing; 2f6. External gear ring; 2f7. Gear. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] The present invention provides Figure 1-6 The device shown is used for stamping and forming electric bicycle accessories, and is used for stamping bicycle brake pads, such as Figure 1 As shown, it includes an upper mold 1 that moves vertically, and a lower mold 2 corresponding to the upper mold 1 is provided below the upper mold 1. Figure 2 As shown, the upper mold 1 includes a punching rod 1a corresponding to the brake pad hole, a mounting seat 1b, a limiting rod 1c passing through the mounting seat 1b, a pressing plate 1d fixedly connected to the bottom end of the limiting rod 1c, and a spring 1e disposed outside the limiting rod 1c. The punching rod 1a is installed on the bottom surface of the mounting seat 1b, as shown in FIG. Figure 3 As shown, the lower mold 2 includes a stamping mold 2a that carries the brake pad and cooperates with the stamping rod 1a, and the lower mold 2 includes a box body 2b, a disc 2c rotatably connected to the top of the box body 2b, a grinding sheet 2d fixedly connected to the top of the disc 2c, a central column 2e fixedly connected to the inside of the box body 2b, and a power component 2f for controlling the lifting and rotation of the disc 2c. Figure 6As shown, the stamping die 2a includes a first bearing block 2a1 fixed to the top of the outer circumferential surface of the central column 2e, a second bearing block 2a2 fixed to the top of the box body 2b, a first sinking groove 2a3 opened on the top of the first bearing block 2a1, a second sinking groove 2a4 opened on the top of the second bearing block 2a2, a third sinking groove 2a5 opened on the top of the disc 2c, and a through hole 2a6 opened in the third sinking groove 2a5 corresponding to the brake pad hole. The sum of the shapes of the first sinking groove 2a3, the second sinking groove 2a4 and the third sinking groove 2a5 is a circle, the diameter of which is the same as the diameter of the brake pad, the shape of the grinding sheet 2d is set to be an incomplete circular ring, and the third sinking groove 2a5 is located between the two ends of the grinding sheet 2d, as shown in FIG. Figure 4 As shown, the power assembly 2f includes a hydraulic cylinder 2f1 fixedly connected to the inner cavity of the box body 2b, a chassis 2f2 fixedly installed at the output end of the hydraulic cylinder 2f1, a hollow column 2f3 and a servo motor 2f4 fixedly connected to the chassis 2f2, a bearing 2f5 fixedly installed at the top of the hollow column 2f3, an outer gear ring 2f6 fixedly installed at the top of the bearing 2f5, and a gear 2f7 fixedly installed at the end of the output shaft of the servo motor 2f4, the gear 2f7 is meshed with the outer gear ring 2f6, the chassis 2f2, the hollow column 2f3, the bearing 2f5 and the outer gear ring 2f6 are all penetrated by the center column 2e and are slidably connected, and the outer gear ring 2f6 is fixedly connected to the bottom surface of the disc 2c.

[0032] Put the unpunched bicycle brake pad into the first sinking groove 2a3, the second sinking groove 2a4 and the third sinking groove 2a5, then the mounting seat 1b in the upper mold 1 descends, the pressing plate 1d contacts the top surface of the brake pad first, then the spring 1e is gradually compressed, and a force is applied to the brake pad toward the third sinking groove 2a5, then the punching rod 1a punches the brake pad, and some metal on the brake pad is punched into the upper hole 2a61 and separated from the brake pad itself. At this time, there will be some burrs on the bottom of the brake pad, and then the mounting seat 1b drives the punching rod 1a to rise, so that the punching rod 1a is not located in the brake pad, but the spring 1e is allowed to maintain elasticity to press the brake pad downward;

[0033] Then the output shaft of the hydraulic cylinder 2f1 is shortened, driving the disc 2c and the grinding sheet 2d to descend, so that there is a certain gap between the top surface of the grinding sheet 2d and the bottom surface of the brake pad. At this time, the brake pad is located in the first sinking groove 2a3 and the second sinking groove 2a4, and is separated from the third sinking groove 2a5. Then the servo motor 2f4 drives the gear 2f7 to rotate, the gear 2f7 drives the outer gear ring 2f6 to rotate, the outer gear ring 2f6 drives the disc 2c to rotate, and the disc 2c drives the grinding sheet 2d to rotate. Figure 6As shown, when the grinding sheet 2d rotates clockwise, the side wall of the grinding sheet 2d contacts the burr, which drives the burr to bend upward, and part of the burr falls into the through hole 2a6, and part of it bends at the non-through hole. Then the servo motor 2f4 drives the grinding sheet 2d to reset, and the punch rod 1a descends to push the burr bent into the through hole 2a6 out of the through hole 2a6, and then the punch rod 1a retracts, and then the hydraulic cylinder 2f1 drives the grinding sheet 2d to rise a little, and the grinding sheet 2d rotates counterclockwise. After the side wall of the other side of the grinding sheet 2d contacts the burr, the burr is bent downward, and then the servo motor 2f4 drives the grinding sheet 2d to reset again, and the punch rod 1a descends again... The above operation is automatically repeated until the top surface of the grinding sheet 2d and the bottom surface of the brake pad are in the same plane;

[0034] At this time, the burrs have been bent repeatedly for many times, resulting in metal fatigue. Most of them have broken and fallen off. Although some have not fallen off, their strength is not enough. You can also increase the number of repeated bending to reduce the amount of burrs remaining.

[0035] Finally, the punching rod 1a descends so that the end face of the bottom end of the punching rod 1a is in the same plane as the bottom surface of the brake pad. At this time, the grinding sheet 2d rotates at high speed, and the remaining burrs are directly pushed and torn off by the side wall, and the top surface of the grinding sheet 2d performs the final grinding on the bottom surface of the brake pad to grind away all the burrs generated when the brake pad is stamped.

[0036] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are exemplary only. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application.

Claims

1. A device for stamping and forming electric bicycle accessories, used for stamping bicycle brake pads, comprising a vertically movable upper mold (1), a lower mold (2) corresponding to the upper mold (1) being provided below the upper mold (1), the upper mold (1) comprising a stamping rod (1a) corresponding to a hole in the brake pad, and the lower mold (2) comprising a stamping die (2a) supporting the brake pad and cooperating with the stamping rod (1a), characterized in that: The lower mold (2) comprises a box body (2b), a disc (2c) rotatably connected to the top of the box body (2b), a grinding sheet (2d) fixedly connected to the top of the disc (2c), a center column (2e) fixedly connected inside the box body (2b), and a power assembly (2f) for controlling the lifting and rotation of the disc (2c); the stamping die (2a) comprises a first bearing block (2a1) fixed to the top of the outer peripheral surface of the center column (2e), a second bearing block (2a2) fixed to the top of the box body (2b), , a first sinking groove (2a3) opened on the top of the first bearing block (2a1), a second sinking groove (2a4) opened on the top of the second bearing block (2a2), a third sinking groove (2a5) opened on the top of the disc (2c), and a through hole (2a6) opened in the third sinking groove (2a5) corresponding to the hole of the brake pad, wherein the sum of the shapes of the first sinking groove (2a3), the second sinking groove (2a4) and the third sinking groove (2a5) is a circle, and the diameter of the circle is the same as the diameter of the brake pad; The power assembly (2f) drives the disc (2c) to descend and then reciprocate, so that the burrs on both sides of the grinding sheet (2d) are scraped and bent back and forth to generate metal fatigue. At the same time, the punching rod (1a) that descends intermittently is used to bend the burrs in the through hole (2a6) downward from a horizontal state to generate metal fatigue. The large burrs are broken off by metal fatigue, and then the top of the grinding sheet (2d) is gradually attached to the brake pad from bottom to top and rotated, so that the remaining fine burrs are gradually ground off.

2. The device for stamping and forming electric bicycle accessories according to claim 1, characterized in that: The depths of the first sinking groove (2a3), the second sinking groove (2a4) and the third sinking groove (2a5) are the same as the thickness of the brake pad.

3. The device for stamping and forming electric bicycle accessories according to claim 1, characterized in that: The shape of the grinding sheet (2d) is set to be an incomplete circular ring, and the third sinking groove (2a5) is located between the two ends of the grinding sheet (2d).

4. The device for stamping and forming electric bicycle accessories according to claim 1, characterized in that: The power assembly (2f) comprises a hydraulic cylinder (2f1) fixedly connected to the inner cavity of the box body (2b), a chassis (2f2) fixedly mounted on the output end of the hydraulic cylinder (2f1), a hollow column (2f3) and a servo motor (2f4) fixedly connected to the chassis (2f2), a bearing (2f5) fixedly mounted on the top of the hollow column (2f3), an outer gear ring (2f6) fixedly mounted on the top of the bearing (2f5), and a gear (2f7) fixedly mounted on the end of the output shaft of the servo motor (2f4), wherein the gear (2f7) meshes with the outer gear ring (2f6), the chassis (2f2), the hollow column (2f3), the bearing (2f5) and the outer gear ring (2f6) are all penetrated by the central column (2e) and are slidably connected, and the outer gear ring (2f6) is fixedly connected to the bottom surface of the disc (2c).

5. The device for stamping and forming electric bicycle accessories according to claim 1, characterized in that: The upper mold (1) comprises a mounting seat (1b), a limiting rod (1c) penetrating the mounting seat (1b), a pressing plate (1d) fixedly connected to the bottom end of the limiting rod (1c), and a spring (1e) disposed outside the limiting rod (1c); the punching rod (1a) is mounted on the bottom surface of the mounting seat (1b).

6. The device for stamping and forming electric bicycle accessories according to claim 5, characterized in that: The pressing plate (1d) is arranged in a circular ring shape, the pressing plate (1d) does not overlap with the through hole (2a6), and the outer diameter of the pressing plate (1d) matches the outer diameter of the brake pad.

7. The device for stamping and forming electric bicycle accessories according to claim 3, characterized in that: The side surfaces formed by the two ends of the grinding sheet (2d) are both perpendicular to the central axis of the central column (2e).

8. The device for stamping and forming electric bicycle accessories according to claim 1, characterized in that: The through hole (2a6) comprises an upper hole (2a61) and a lower hole (2a62), and the size of the lower hole (2a62) is 1.1-1.3 times that of the upper hole (2a61).

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