Injection molding gear hole shaping tool

Abstract

The utility model discloses a kind of injection molding gear inner hole shaping frock, belong to injection molding gear inner hole shaping frock technical field, it includes: base and injection molding gear body, the top of the base is fixedly connected with carousel, the outside of carousel is slidably connected with four shaping plates, the outside of four the injection molding gear body is movably abutted in shaping plate, the inside of carousel is fixedly connected with bottom disc, the inside of bottom disc is rotatably connected with threaded rod, the utility model structure design is reasonable, by the cooperation of clamping plate, clamping groove, vertical plate and first spring, while realizing that shaping plate adjusts the strength to the inner hole of injection molding gear body, also increase the application range of device, shaping can be used to different inner hole diameter injection molding gear body, by the cooperation of big semicircle plate, small semicircle plate, cylinder and second spring, shaping work to injection molding gear body is realized, and the working efficiency of device is improved.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology for shaping the inner hole of injection molded gears, and in particular to a tooling for shaping the inner hole of injection molded gears. Background Technology

[0002] Because injection molded gears have lower manufacturing costs, lighter weight, and lower noise during operation and transmission, they are widely used in the mechanical field. The inner hole of the injection molded gear that mates with the gear shaft is generally formed in one injection molding process. However, due to the more severe thermal expansion and contraction of injection molded gears compared to metal gears, the inner hole of the injection molded gear often has a certain degree of deformation. This makes it difficult to assemble with the gear shaft when it is put into use, resulting in low assembly efficiency between injection molded gears and gear shafts.

[0003] Therefore, we propose a tooling for shaping the inner bore of injection molded gears to solve this problem. Utility Model Content

[0004] The purpose of this utility model is to provide a tooling for shaping the inner hole of injection molded gears to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A tooling for shaping the inner hole of an injection-molded gear includes: a base and an injection-molded gear body. A turntable is fixedly connected to the top of the base, and four shaping plates are slidably connected to the outside of the turntable. The injection-molded gear body movably abuts against the outside of the four shaping plates.

[0006] Preferably, a base is fixedly connected inside the turntable, a threaded rod is rotatably connected inside the base, a screw cylinder is threadedly connected to the outside of the threaded rod, a cylinder is fixedly connected to one side of each of the four shaping plates that are close to each other, a small semicircular plate is fixedly connected to one side of each of the four cylinders that are close to each other, a large semicircular plate is fixedly connected to the top of the screw cylinder, and the large semicircular plate movably abuts against one side of each of the four small semicircular plates that are close to each other.

[0007] Preferably, each of the four small semicircular plates is fixedly connected to a second spring on the side away from each other, and the ends of the four second springs are fixedly connected to the inner wall of the same turntable. Two guide posts are fixedly connected to the top of the chassis, and rectangular plates are fixedly connected to both sides of the large semicircular plate. The two guide posts are slidably connected inside the corresponding rectangular plates.

[0008] Preferably, a turntable is fixedly connected to the bottom end of the threaded rod, a plurality of slots are provided on the top of the turntable, a retaining plate is slidably connected inside the turntable, the retaining plate is movably engaged inside one of the slots, a pull ring is fixedly connected to the bottom of the retaining plate, a vertical groove is provided inside the turntable, a vertical plate is fixedly connected to the top of the pull ring, and the vertical plate is slidably connected inside the vertical groove.

[0009] Preferably, a first spring is fixedly connected to the top of the vertical plate, and the top end of the first spring is fixedly connected to the top of the inner wall of the vertical groove.

[0010] Preferably, a horizontal limiting plate is fixedly connected to the outside of each of the two guide posts, and the two rectangular plates are movably abutted against the bottom of the corresponding horizontal limiting plate.

[0011] Preferably, each of the four shaping plates is fixedly connected to an arc-shaped limiting plate, the bottom of the injection-molded gear body is movably abutted against the top of the four arc-shaped limiting plates, and the top of the base is provided with four screw holes.

[0012] In this utility model, the inner hole shaping fixture for injection molded gears is installed on the corresponding device through the screw hole, and then the injection molded gear body is placed outside the four shaping plates. The bottom of the injection molded gear body abuts against the top of the four arc-shaped limiting plates. The pull ring is pulled down to drive the clamping plate to move downward, so that the clamping plate contacts and engages with a certain clamping groove. The turntable is rotated to drive the threaded rod to rotate, so that the screw barrel and the large semicircular plate begin to move upward, so that the four small semicircular plates begin to move away from each other, so that the outer sides of the four shaping plates abut against the inner wall of the same injection molded gear body. In this utility model, the inner hole shaping fixture for injection molded gears adjusts the force of the shaping plate against the injection molded gear body by continuously rotating the turntable. When the force is appropriate, the pull ring is released, and the clamping plate is re-clamped into the new clamping groove. After the inner hole shaping is completed, the threaded rod is rotated in the opposite direction to release the four shaping plates from the abutment relationship with the injection molded gear body, and then the injection molded gear body is moved upward. This utility model has a reasonable structural design. Through the cooperation of the clamping plate, the clamping groove, the vertical plate and the first spring, it not only realizes the force adjustment of the forming plate on the inner hole of the injection molded gear body, but also increases the applicability of the device. At the same time, it can use injection molded gear bodies with different inner hole diameters for forming. Through the cooperation of the large semicircular plate, the small semicircular plate, the cylinder and the second spring, the forming work of the injection molded gear body is realized, which improves the working efficiency of the device. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a tooling for shaping the inner hole of an injection-molded gear, as proposed in this utility model. Figure 2 This is a cross-sectional view of a tooling for shaping the inner hole of an injection-molded gear, as proposed in this utility model. Figure 3 for Figure 2 A magnified view of part A in the middle; Figure 4 for Figure 2 A magnified view of part B in the middle section; Figure 5 This is a three-dimensional structural diagram of the first spring, groove, and pull ring of the injection molded gear inner hole shaping tooling proposed in this utility model.

[0014] In the diagram: 1. Injection-molded gear body; 2. Shaping plate; 3. Arc-shaped limiting plate; 4. Base; 5. Screw hole; 6. Turntable; 7. Threaded rod; 8. Chassis; 9. Clamping plate; 10. Vertical groove; 11. Vertical plate; 12. Pull ring; 13. First spring; 14. Clamping groove; 15. Cylinder; 16. Small semicircular plate; 17. Second spring; 18. Large semicircular plate; 19. Guide post; 20. Horizontal limiting plate; 21. Rectangular plate; 22. Screw barrel. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figures 1-5 A tooling for shaping the inner hole of an injection-molded gear includes: a base 4 and an injection-molded gear body 1. A turntable 6 is fixedly connected to the top of the base 4, and four shaping plates 2 are slidably connected to the outside of the turntable 6. The injection-molded gear body 1 is movably abutted against the outside of the four shaping plates 2.

[0017] In this embodiment, a base plate 8 is fixedly connected inside the turntable 6, a threaded rod 7 is rotatably connected inside the base plate 8, a screw cylinder 22 is threadedly connected to the outside of the threaded rod 7, a cylinder 15 is fixedly connected to the side of each of the four shaping plates 2 that are close to each other, a small semicircular plate 16 is fixedly connected to the side of each of the four cylinders 15 that are close to each other, and a large semicircular plate 18 is fixedly connected to the top of the screw cylinder 22. The large semicircular plate 18 movably abuts against the side of each of the four small semicircular plates 16 that are close to each other, thereby realizing the shaping function of the injection molded gear body 1.

[0018] In this embodiment, each of the four small semicircular plates 16 is fixedly connected to a second spring 17 on one side away from each other. The ends of the four second springs 17 are fixedly connected to the inner wall of the same turntable 6. Two guide posts 19 are fixedly connected to the top of the chassis 8. Rectangular plates 21 are fixedly connected to both sides of the large semicircular plate 18. The two guide posts 19 are slidably connected inside the corresponding rectangular plates 21, thereby realizing the guiding function of the rectangular plates 21.

[0019] In this embodiment, a turntable 6 is fixedly connected to the bottom end of the threaded rod 7. A plurality of slots 14 are provided on the top of the turntable 6. A retaining plate 9 is slidably connected inside the turntable 6. The retaining plate 9 is movably engaged inside a certain slot 14. A pull ring 12 is fixedly connected to the bottom of the retaining plate 9. A vertical groove 10 is provided inside the turntable 6. A vertical plate 11 is fixedly connected to the top of the pull ring 12. The vertical plate 11 is slidably connected inside the vertical groove 10, thereby realizing the guiding function of the vertical plate 11.

[0020] In this embodiment, a first spring 13 is fixedly connected to the top of the vertical plate 11, and the top end of the first spring 13 is fixedly connected to the top of the inner wall of the vertical groove 10. Horizontal limiting plates 20 are fixedly connected to the outside of the two guide pillars 19. The two rectangular plates 21 are movably abutted against the bottom of the corresponding horizontal limiting plates 20. Arc-shaped limiting plates 3 are fixedly connected to the outside of the four shaping plates 2. The bottom of the injection-molded gear body 1 is movably abutted against the top of the four arc-shaped limiting plates 3. The top of the base 4 is provided with four screw holes 5, which realizes the function of limiting the vertical movement of the rectangular plates 21.

[0021] In this embodiment, during use, the base 4 is installed on the corresponding device through the screw hole 5, and then the injection-molded gear body 1 is placed outside the four shaping plates 2, so that the bottom of the injection-molded gear body 1 abuts against the top of the four arc-shaped limiting plates 3. Pulling down the pull ring 12 causes the clamping plate 9 to move downwards, so that the clamping plate 9 contacts and engages with a certain clamping groove 14. Then, rotating the turntable 6 causes the threaded rod 7 to rotate, so that the screw cylinder 22 and the large semi-circular plate 18 begin to move upwards, and the four small semi-circular plates 16 begin to move away from each other, so that the outside of the four shaping plates 2 abuts against the inner wall of the same injection-molded gear body 1. The turntable 6 is then rotated further to adjust the contact between the shaping plates 2 and the injection-molded gear body. When the force is appropriate, release the pull ring 12. At that time, the clamping plate 9 will re-clamp into the new clamping groove 14. After the inner hole is shaped, rotate the threaded rod 7 in the opposite direction to release the four shaping plates 2 from the injection molded gear body 1, and then move the injection molded gear body 1 upward. Through the cooperation of the clamping plate 9, the clamping groove 14, the vertical plate 11 and the first spring 13, the force adjustment of the shaping plate 2 on the inner hole of the injection molded gear body 1 is realized, and the applicability of the device is increased. At the same time, injection molded gear bodies 1 with different inner hole diameters can be used for shaping. Through the cooperation of the large semicircular plate 18, the small semicircular plate 16, the cylinder 15 and the second spring 17, the shaping work of the injection molded gear body 1 is realized, and the working efficiency of the device is improved.

[0022] The present invention provides a detailed description of an injection-molded gear inner hole shaping fixture. Specific embodiments have been used to illustrate the principle and implementation of the present invention. These embodiments are merely illustrative and are intended to aid in understanding the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A tooling for shaping the inner bore of injection-molded gears, characterized in that, include: The base (4) and the injection molded gear body (1) are provided. A turntable (6) is fixedly connected to the top of the base (4). Four shaping plates (2) are slidably connected to the outside of the turntable (6). The injection molded gear body (1) is movably abutted against the outside of the four shaping plates (2).

2. The tooling for shaping the inner hole of an injection-molded gear according to claim 1, characterized in that, The turntable (6) is fixedly connected to a base plate (8), and the base plate (8) is rotatably connected to a threaded rod (7). The threaded rod (7) is threadedly connected to a screw cylinder (22). A cylinder (15) is fixedly connected to one side of each of the four shaping plates (2). A small semicircular plate (16) is fixedly connected to one side of each of the four cylinders (15). A large semicircular plate (18) is fixedly connected to the top of the screw cylinder (22). The large semicircular plate (18) is movably abutted against one side of each of the four small semicircular plates (16).

3. The tooling for shaping the inner hole of an injection-molded gear according to claim 2, characterized in that, Each of the four small semicircular plates (16) is fixedly connected to a second spring (17) on the side away from each other. The ends of the four second springs (17) are fixedly connected to the inner wall of the same turntable (6). Two guide posts (19) are fixedly connected to the top of the chassis (8). Rectangular plates (21) are fixedly connected to both sides of the large semicircular plate (18). The two guide posts (19) are slidably connected inside the corresponding rectangular plates (21).

4. The tooling for shaping the inner hole of an injection-molded gear according to claim 2, characterized in that, The bottom end of the threaded rod (7) is fixedly connected to a turntable (6). The top of the turntable (6) is provided with multiple slots (14). The inside of the turntable (6) is slidably connected to a card plate (9). The card plate (9) is movably engaged inside one of the slots (14). The bottom of the card plate (9) is fixedly connected to a pull ring (12). The inside of the turntable (6) is provided with a vertical groove (10). The top of the pull ring (12) is fixedly connected to a vertical plate (11). The vertical plate (11) is slidably connected inside the vertical groove (10).

5. The tooling for shaping the inner bore of an injection-molded gear according to claim 4, characterized in that, The top of the vertical plate (11) is fixedly connected to a first spring (13), and the top end of the first spring (13) is fixedly connected to the top of the inner wall of the vertical groove (10).

6. The tooling for shaping the inner hole of an injection-molded gear according to claim 3, characterized in that, Both guide posts (19) are fixedly connected to a horizontal limiting plate (20), and both rectangular plates (21) are movably abutted against the bottom of the corresponding horizontal limiting plate (20).

7. The tooling for shaping the inner bore of an injection-molded gear according to claim 1, characterized in that, The four shaping plates (2) are all fixedly connected to the outside of the arc-shaped limiting plates (3), the bottom of the injection molded gear body (1) is movably abutted against the top of the four arc-shaped limiting plates (3), and the top of the base (4) is provided with four screw holes (5).

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