A high-efficiency toothed chain wheel production mold for powder metallurgy

Abstract

This utility model discloses a high-efficiency toothed sprocket production mold for powder metallurgy, relating to the field of sprocket production. It includes a lower mold base, with a support frame fixedly connected to the top of the lower mold base. Cylinders are installed on both sides inside the lower mold base, and a fixed plate is fixedly connected to the output end of each cylinder. An upper mold is fixedly connected to the bottom of the fixed plate. A powder box is also provided above the lower mold base, with a scraper and discharge port installed at the bottom of the powder box. A drive mechanism for moving the powder box is provided on the fixed plate. The opening and closing of the mold is achieved by driving the fixed plate and the upper mold up and down through the cylinders. Simultaneously, a rack and pinion transmission mechanism converts the up-and-down movement of the upper mold into the horizontal movement of the powder box. When the upper mold presses down for forming, the powder box automatically moves away from the mold hole to avoid interference. After forming, it automatically returns to the center position for powder filling. The entire process requires minimal manual intervention.

Description

Technical Field

[0001] This utility model relates to the field of sprocket manufacturing technology, specifically a high-efficiency toothed sprocket production mold for powder metallurgy. Background Technology

[0002] Powder metallurgy is a method of manufacturing metal products with specific shapes and properties by molding and sintering metal powders. In the production of high-efficiency toothed sprockets, powder metallurgy technology can also be combined with it to achieve more efficient and high-quality production. Through the precise matching of upper and lower dies, the powder metallurgy process enables toothed sprockets to achieve high dimensional and shape accuracy, especially in tooth profile accuracy, and can meet the usage requirements without a lot of subsequent processing.

[0003] For example, patent CN217166397U discloses a mold for producing sprockets, including a mold structure. The sprocket mold can be quickly assembled and disassembled by assembling several combined tooth blocks. It can produce different types of sprockets, clean the mold cavity, and set up a cooling structure to cool the sprocket casting material simultaneously from the center and the periphery, thus accelerating the cooling and forming efficiency of the sprocket casting material. If powder metallurgy is used in the production of toothed sprockets, traditional casting methods are difficult to meet the material feeding requirements of powder metallurgy processes. It is necessary to manually feed the powder, which is not only labor-intensive and inefficient, but also poses many safety hazards. If the machine malfunctions during the feeding process, workers often do not have time to react and may be pulled into the machine, resulting in serious bodily injury.

[0004] To address the aforementioned issues, there is an urgent need for innovative design based on the existing high-efficiency toothed sprocket production molds. Utility Model Content

[0005] The purpose of this utility model is to provide a high-efficiency toothed sprocket production mold for powder metallurgy, so as to solve the problem mentioned in the background art that requires manual feeding of powder, which is not only labor-intensive and inefficient, but also poses many safety hazards. If the machine malfunctions during the feeding process, workers often do not have time to react and may be caught in the machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a production mold for a high-efficiency toothed sprocket for powder metallurgy, comprising a lower mold base, a support frame fixedly connected to the top of the lower mold base, cylinders installed on both sides inside the lower mold base, a fixed plate fixedly connected to the output end of the cylinders, and an upper mold fixedly connected to the bottom of the fixed plate.

[0007] A powder box is also provided above the lower mold base, and a scraper and a discharge port are installed at the bottom of the powder box;

[0008] The fixed plate is equipped with a drive mechanism for moving the powder box.

[0009] Furthermore, the driving mechanism includes a first rack, which is fixedly connected to both sides of the fixed plate. A first gear meshes with one side of the bottom of the first rack. A transmission shaft is fixedly connected inside the two first gears. Second gears are also fixedly connected to both ends of the outer wall of the transmission shaft. A second rack meshes with the top of the second gear. A fixing strip is fixedly connected between one end of the top of the two second racks. The fixing strip is slidably connected to the top of the lower mold base and is fixedly connected to the powder box.

[0010] Furthermore, the top of the lower mold base is provided with a mold hole corresponding to the upper mold, and a release template is slidably connected inside the mold hole.

[0011] Furthermore, the first rack is provided with an ejection mechanism for ejecting the template.

[0012] Furthermore, the ejection mechanism includes a connecting plate, which is fixedly connected to one side of the first rack. A sliding groove is provided inside the connecting plate, and a connecting rod is slidably connected inside the sliding groove. A connecting strip is fixedly connected between one end of the two connecting rods, and an ejection rod is fixedly connected to the top of the connecting strip. The top of the ejection rod is fixedly connected to the demolding template.

[0013] Furthermore, a slope is provided on one side of the top of the lower mold base.

[0014] Furthermore, the two cylinders are driven synchronously.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This high-efficiency toothed sprocket production mold for powder metallurgy operates by activating a cylinder, which moves a fixed plate up and down. This movement, in turn, causes the upper mold to rotate vertically, shaping the metal powder. In normal operation, the powder box is located at the center of the lower mold base. During the downward pressing of the upper mold, the two first racks on the fixed plate move downwards synchronously. These racks mesh with the first gear, causing it to rotate. Since a second gear is mounted on the internal drive shaft of the first gear, its rotation drives the drive shaft, which in turn rotates the second gear. The second gear then drives the second tooth at its top. The strip moves inside the lower mold base, thereby displacing the powder box. During the downward pressing of the upper mold, the powder box moves away from the mold hole on the lower mold base and stops at a position where it does not interfere with the upper mold. At this point, the upper mold and the mold hole on the lower mold base combine to realize the forming operation of metal powder. It can realize automatic powder feeding, and can also feed the already formed toothed sprocket through the scraper on the powder box. When the powder box is located at the top center of the lower mold base to fill powder without affecting the forming operation, it can be moved away during forming. It makes full use of the limited equipment space, makes the equipment layout more reasonable, and is conducive to arranging more production equipment in a limited production site, thereby improving the site utilization rate.

[0017] Furthermore, during the operation of the first rack, it drives the ejection mechanism to work, thereby ejecting the forming toothed sprocket from the mold hole. The first rack drives the connecting plate to move, which in turn drives the connecting rod to slide in the internal groove of the connecting plate. When the connecting rod slides to the top or bottom of the sliding groove of the connecting plate, it will be driven by the connecting plate to move up and down. That is, when the connecting rod slides in the sliding groove, its position remains unchanged. When the connecting rod abuts against the top or bottom of the sliding groove, it will be driven by the connecting plate to achieve up and down displacement. This can effectively reduce the stroke of the ejector rod and avoid the mold hole from being too deep due to excessive ejector rod stroke. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall rear view structure of this utility model;

[0020] Figure 3 This is a side view of the drive mechanism of this utility model.

[0021] Figure 4 This is a bottom view of the drive mechanism of this utility model;

[0022] Figure 5 This is a partial structural diagram of the drive mechanism of this utility model;

[0023] Figure 6 This is a partial structural schematic diagram of the ejection mechanism of this utility model;

[0024] In the diagram: 1. Lower mold base; 2. Support frame; 3. Cylinder; 4. Fixing plate; 5. Upper mold; 6. Powder box; 7. First rack; 8. First gear; 9. Drive shaft; 10. Second gear; 11. Second rack; 12. Connecting plate; 13. Connecting rod; 14. Connecting strip; 15. Ejector rod; 16. Fixing strip; 17. Demolding plate. Detailed Implementation

[0025] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: Please refer to Figures 1-6 This utility model provides the following technical solution: a high-efficiency toothed sprocket production mold for powder metallurgy, comprising a lower mold base 1, a support frame 2 fixedly connected to the top of the lower mold base 1, cylinders 3 installed on both sides inside the lower mold base 1, a fixed plate 4 fixedly connected to the output end of the cylinders 3, and an upper mold 5 fixedly connected to the bottom of the fixed plate 4; a powder box 6 is also provided above the lower mold base 1, and a scraper and a discharge port are installed at the bottom of the powder box 6; a driving mechanism for driving the powder box 6 to move is provided on the fixed plate 4; the driving mechanism includes a first rack 7, the first rack 7 being fixedly connected to... The first gear 8 is meshed on one side of the bottom of the first rack 7, which is attached to both sides of the fixed plate 4. The two first gears 8 are fixedly connected to the transmission shaft 9. The two ends of the outer wall of the transmission shaft 9 are also fixedly connected to the second gear 10. The top of the second gear 10 is meshed with the second rack 11. A fixing strip 16 is fixedly connected between the top ends of the two second racks 11. The fixing strip 16 is slidably connected to the top of the lower mold base 1 and is fixedly connected to the powder box 6. The top of the lower mold base 1 is provided with a mold hole corresponding to the upper mold 5. A stripping template 17 is slidably connected inside the mold hole.

[0027] In use, by activating cylinder 3, cylinder 3 drives fixed plate 4 to move up and down, thereby causing fixed plate 4 to move upper mold 5 up and down to perform the molding operation on metal powder. Under normal conditions, powder box 6 is located at the center of the top of lower mold base 1. During the downward pressing of upper mold 5, upper mold 5 drives the two first racks 7 on fixed plate 4 to move downward synchronously. The first racks 7 mesh with the first gear 8, so the first gear 8 rotates under the action of the first racks 7. Since the second gear 10 is installed on the transmission shaft 9 inside the first gear 8, the first gear 8 rotates... After rotation, the first gear 8 drives the transmission shaft 9 to rotate, which in turn drives the second gear 10 to rotate. The second gear 10 drives the second rack 11 at its top to move inside the lower mold base 1, thereby displacing the powder box 6. As the upper mold 5 presses down, the powder box 6 moves away from the mold hole on the lower mold base 1 and stops at a position where it does not interfere with the upper mold 5. At this time, the upper mold 5 and the mold hole on the lower mold base 1 are combined to realize the forming operation of metal powder. Conversely, the powder box 6 can be moved back to the center position of the lower mold base 1 to fill the inside of the mold hole with powder.

[0028] Example 2: Based on Example 1, an ejection mechanism is also disclosed, the specific structure of which is as follows:

[0029] The ejection mechanism includes a connecting plate 12, which is fixedly connected to one side of the first rack 7. A sliding groove is provided inside the connecting plate 12, and a connecting rod 13 is slidably connected inside the sliding groove. A connecting strip 14 is fixedly connected between one end of the two connecting rods 13, and an ejection rod 15 is fixedly connected to the top of the connecting strip 14. The top of the ejection rod 15 is fixedly connected to the demolding template 17. An inclined surface is provided on one side of the top of the lower mold base 1. The two cylinders 3 are driven synchronously.

[0030] In use, since the connecting plate 12 is fixed to one side of the first rack 7, when the first rack 7 moves upward, the connecting plate 12 will move accordingly. The connecting plate 12 has a sliding groove inside, and the connecting rod 13 slides in the sliding groove. When the connecting rod 13 reaches the bottom of the sliding groove, the connecting rod 13 can no longer continue in the sliding groove. At this time, the first rack 7 continues to move upward, driving the connecting plate 12 to move synchronously. The connecting rod 13 moves upward under the drive of the connecting plate 12, thereby driving the connecting bar 14 to move. The connecting bar 14 drives the ejector rod 15 to move upward, and the ejector rod 15 drives the demolding template 17 to move, thereby ejecting the formed toothed sprocket. With the cooperation of the powder box 6, it moves to the inclined surface on the lower mold base 1, realizing demolding while quickly completing the unloading operation.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency toothed sprocket production mold for powder metallurgy, comprising a lower mold base (1), characterized in that: The top of the lower mold base (1) is fixedly connected to a support frame (2), and cylinders (3) are installed on both sides inside the lower mold base (1). The output end of the cylinder (3) is fixedly connected to a fixing plate (4), and the bottom of the fixing plate (4) is fixedly connected to an upper mold (5). A powder box (6) is also provided above the lower mold base (1), and a scraper and a discharge port are installed at the bottom of the powder box (6); The fixed plate (4) is provided with a drive mechanism for moving the powder box (6).

2. A production mold for a high-efficiency sprocket wheel for powder metallurgy according to claim 1, characterized in that: The driving mechanism includes a first rack (7), which is fixedly connected to both sides of the fixed plate (4). A first gear (8) is engaged on one side of the bottom of the first rack (7). A transmission shaft (9) is fixedly connected inside the two first gears (8). A second gear (10) is also fixedly connected to both ends of the outer wall of the transmission shaft (9). A second rack (11) is engaged at the top of the second gear (10). A fixing strip (16) is fixedly connected between one end of the top of the two second racks (11). The fixing strip (16) is slidably connected to the top of the lower mold base (1). The fixing strip (16) is fixedly connected to the powder box (6).

3. A production mold for a high-efficiency sprocket for powder metallurgy according to claim 1, characterized in that: The lower mold base (1) has a mold hole at its top that corresponds to the upper mold (5), and a release plate (17) is slidably connected inside the mold hole.

4. A production mold for a high-efficiency sprocket wheel for powder metallurgy according to claim 2, characterized in that: The first rack (7) is provided with an ejection mechanism for ejecting the template (17).

5. A production mold for a high-efficiency sprocket wheel for powder metallurgy according to claim 4, characterized in that: The ejection mechanism includes a connecting plate (12), which is fixedly connected to one side of the first rack (7). A sliding groove is provided inside the connecting plate (12), and a connecting rod (13) is slidably connected inside the sliding groove. A connecting strip (14) is fixedly connected between one end of the two connecting rods (13), and an ejection rod (15) is fixedly connected to the top of the connecting strip (14). The top of the ejection rod (15) is fixedly connected to the demolding template (17).

6. A production mold for a high-efficiency sprocket wheel for powder metallurgy according to claim 1, characterized in that: The lower mold base (1) has a sloping surface on one side of its top.

7. A production mold for a high-efficiency sprocket for powder metallurgy according to claim 1, characterized in that: The two cylinders (3) are driven synchronously.

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