A large gear combined by forging and welding

Abstract

The utility model discloses a kind of forged and welded composite large gears, including locking bolt, semicircle positioning groove and positioning cylinder.The forged and welded composite large gear, semicircle inner ring is symmetrically welded and fixed with semicircle support plate, reinforcing rib plate is welded and fixed with common circumference between semicircle inner ring and semicircle support plate, semicircle outer ring is welded and fixed with the outer edge of semicircle inner ring and reinforcing rib plate, gear slot is evenly provided on the outer surface of semicircle outer ring, end plate is welded and fixedly connected with corresponding semicircle outer ring and semicircle support plate on the straight edge of semicircle inner ring, end plate is welded and fixed with semicircle outer ring and semicircle support plate, two semicircle inner rings are combined and fixed by end plate assembly, fixed installation by locking bolt between end plate, semicircle positioning groove is commonly provided on end plate and semicircle inner ring, using forged and welded composite process, by welding and forging combination, reduce internal defect risk, improve the integrity and service life of gear.

Description

Technical Field

[0001] This utility model relates to a large gear, specifically a forged and welded composite large gear. Background Technology

[0002] In the field of rotary equipment design and manufacturing, gear pairs, as core power transmission components, bear the crucial mission of driving the continuous operation of the rotating parts of the equipment (including the equipment's own weight and materials). Among them, the large gear (or large gear ring) fixed to the cylinder is the core load-bearing component. Currently, most of these large gears adopt a design of being a whole circle divided into two halves, and due to structural limitations, they have long relied on casting molding processes.

[0003] However, although large gears adopt a design of splitting a whole circle into two halves, the half gears are still relatively complex in structure. Metal casting is prone to internal defects, and some defects are only exposed after the tooth profile is precision machined. When these defects cannot be repaired, the gear will be scrapped directly, resulting in huge economic losses and extending the manufacturing period. Therefore, a forged and welded composite large gear is proposed to optimize the existing large gears. Utility Model Content

[0004] The purpose of this invention is to provide a forged and welded composite large gear to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A forged and welded composite large gear includes a semi-circular inner ring, on which a semi-circular support plate is symmetrically welded and fixed. A reinforcing rib is welded and fixed around the common circumference of the semi-circular inner ring and the semi-circular support plate. A semi-circular outer ring is welded and fixed around the outer edges of the semi-circular inner ring and the reinforcing rib. The outer surface of the semi-circular outer ring is uniformly provided with tooth grooves. An end plate is welded and fixedly connected to the straight edge of the semi-circular inner ring and corresponding to the semi-circular outer ring and the semi-circular support plate. The end plate is welded and fixed to the semi-circular outer ring and the semi-circular support plate. The two semi-circular inner rings are combined with each other and fixed by the end plate assembly. The end plates are fixedly installed by locking bolts.

[0006] As a further embodiment of this utility model: a semi-circular positioning groove is provided on both the end plate and the semi-circular inner ring, and the two corresponding semi-circular positioning grooves fit together to form a hole and a positioning cylinder is inserted into the hole, and the positioning cylinder is welded and fixed to the end plate.

[0007] As a further improvement of this utility model: a weight-reducing groove is provided on the circumference between the outer extension of the semi-circular inner ring and the reinforcing ribs.

[0008] As a further embodiment of this utility model: the inner semicircular ring is welded and fixed to both sides of the reinforcing rib, the connecting ears are welded and fixed to the reinforcing rib, and the connecting ears are fixedly installed to the outer semicircular ring by connecting bolts.

[0009] As a further improvement of this utility model, a first deformation groove is provided at the inner end of the straight edge of the semicircular inner ring.

[0010] As a further embodiment of this utility model: the inner circumference of the semicircular inner ring is provided with mounting holes, wherein four mounting holes are open to form a second deformation groove, and connecting reinforcing blocks that are welded and fixed to the semicircular inner ring are symmetrically provided on both sides of the second deformation groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are: Existing technologies use casting, which is prone to internal defects (such as porosity and shrinkage cavities). These defects may be exposed after finishing, leading to gear failure. This invention employs a forging-welding composite process, combining welding and forging to reduce the risk of internal defects and improve gear integrity and service life.

[0012] The end plate and the inner semicircular ring of this utility model are provided with a semicircular positioning groove and a positioning cylinder to ensure accurate alignment when the two semicircular parts are assembled, avoid misalignment, and improve assembly accuracy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a forged and welded composite large gear.

[0014] Figure 2 This is a diagram illustrating the semi-circular inner ring of a forged and welded composite large gear.

[0015] Figure 3 This is a diagram illustrating the semicircular outer ring of a forged and welded composite large gear.

[0016] Figure 4 This is a diagram showing the combination of a semi-circular inner ring and a semi-circular outer ring in a forged and welded composite large gear.

[0017] Figure 5 This is an enlarged view of a partial structure in a forged and welded composite large gear.

[0018] Figure 6 This is a cross-sectional view of a local structure in a forged and welded composite large gear.

[0019] In the diagram: 1. Semicircular inner ring; 2. Semicircular support plate; 3. Reinforcing rib; 4. Semicircular outer ring; 5. Gear groove; 6. End plate; 7. Locking bolt; 8. Semicircular positioning groove; 9. Positioning cylinder; 10. Weight reduction groove; 11. Connecting ear; 12. Connecting bolt; 13. First deformation groove; 14. Mounting hole; 15. Second deformation groove; 16. Connecting reinforcing block. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-6 In this embodiment of the present invention, a forged and welded composite large gear includes a semi-circular inner ring 1, a semi-circular support plate 2 symmetrically welded and fixed on the semi-circular inner ring 1, a reinforcing rib plate 3 welded and fixed on the common circumference between the semi-circular inner ring 1 and the semi-circular support plate 2, a semi-circular outer ring 4 welded and fixed on the outer edges of the semi-circular inner ring 1 and the reinforcing rib plate 3, tooth grooves 5 uniformly opened on the outer surface of the semi-circular outer ring 4, an end plate 6 welded and fixed on the straight edge of the semi-circular inner ring 1 and corresponding to the semi-circular outer ring 4 and the semi-circular support plate 2, the end plate 6 welded and fixed to the semi-circular outer ring 4 and the semi-circular support plate 2, the two semi-circular inner rings 1 are combined with each other and fixed by assembly through the end plate 6, the end plates 6 are fixedly installed by locking bolts 7, the locking bolts 7 pass through the end plates 6 and are threaded with nuts, the locking bolts 7 are provided with washers, and the end plates 6 are provided with round holes for the locking bolts 7 to pass through.

[0022] First, weld the semicircular support plate 2 onto the inner semicircular ring 1, then further weld the reinforcing rib plate 3 and the end plate 6, and then further weld the connecting lug 11. At this time, attach the outer semicircular ring 4 to the outer edge of the inner semicircular ring 1 and connect and fix it with the connecting bolt 12. Then weld and fix the outer semicircular ring 4 to form a semicircular gear pair. Then, combine the two semicircular gear pairs and place the positioning cylinder 9 in the two semicircular positioning grooves 8 that match as holes. Then, combine the two semicircular gear pairs with the locking bolt 7 and further weld and fix the positioning cylinder 9 to form a complete circular gear.

[0023] The end plate 6 and the semi-circular inner ring 1 are both provided with a semi-circular positioning groove 8. The two semi-circular positioning grooves 8 are matched to form a hole and a positioning cylinder 9 is inserted into the hole. The positioning cylinder 9 is welded and fixed to the end plate 6.

[0024] When assembling two welded semi-circular gear pairs, the positioning cylinder 9 can be inserted into the semi-circular positioning groove 8, and then locked in place by the locking bolt 7. This prevents misalignment after assembly. Furthermore, the positioning cylinder 9 is welded in place to increase the stability of the connection. A weight-reducing groove 10 is provided on the circumference between the outer extension of the semi-circular inner ring 1 and the reinforcing rib 3.

[0025] The weight of the overall gear is reduced by setting the weight-reducing slot 10.

[0026] The inner semicircular ring 1 is welded and fixed to both sides of the reinforcing rib 3. The connecting ears 11 are welded and fixed to the reinforcing rib 3. The connecting ears 11 are fixedly installed to the outer semicircular ring 4 by connecting bolts 12. The connecting ears 11 have a round hole for the connecting bolts 12 to pass through. The outer semicircular ring 4 has a threaded hole for the connecting bolts 12 to be threaded. A washer is inserted through the connecting bolts 12.

[0027] Pre-connection is achieved by using connecting lug 11 and connecting bolt 12 during the assembly welding of the semi-circular outer ring 1 and the semi-circular inner ring 4, which facilitates subsequent welding processing. The inner end of the straight edge of the semicircular inner ring 1 is provided with a first deformation groove 13.

[0028] The inner circumference of the semicircular inner ring 1 is provided with mounting holes 14, and four mounting holes 14 are open to form a second deformation groove 15. The two sides of the second deformation groove 15 are symmetrically provided with connecting reinforcing blocks 16 that are welded and fixed to the semicircular inner ring 1.

[0029] The working principle of this utility model is as follows: During use and manufacturing, the semicircular support plate 2 is first symmetrically welded and fixed on the inner semicircle 1 to provide basic support; then, the reinforcing rib 3 is welded and fixed on the common circumference between the inner semicircle 1 and the semicircular support plate 2 to enhance the structural rigidity.

[0030] Then, the outer semicircular ring 4 is welded and fixed together with the outer edges of the inner semicircular ring 1 and the reinforcing rib 3. The outer surface of the outer semicircular ring 4 is evenly provided with toothed grooves 5 for meshing with the gear pair to transmit power. To facilitate subsequent assembly, an end plate 6 is welded and fixed on the straight edge of the inner semicircular ring 1. The end plate 6 is located between the outer semicircular ring 4 and the semicircular support plate 2, serving as a connection and reinforcement. When assembling the semicircular components, the outer semicircular ring 4 and the inner semicircular ring 1 are pre-connected and fixed using connecting lugs 11 and connecting bolts 12 to ensure alignment before welding, reducing deformation.

[0031] In this way, each semicircular component is manufactured independently, forming a semicircular gear pair.

[0032] When two semicircular gear pairs need to be combined to form a complete gear, the working principle enters the critical assembly stage: The two semicircular inner rings 1 are aligned so that their end plates 6 fit together. At this point, the semicircular positioning grooves 8 on the end plates 6 and the semicircular inner rings 1 align to form a complete circular hole. A positioning cylinder 9 is inserted into this hole to ensure precise alignment of the two semicircular components and prevent misalignment. Then, locking bolts 7 are passed through the end plates 6 and secured with nuts to tightly connect the two semicircular gear pairs. Finally, the positioning cylinder 9 is welded to the end plates 6 to further increase the stability of the assembled gear.

[0033] 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 forged and welded composite large gear, comprising a semi-circular inner ring (1), characterized in that: A semicircular support plate (2) is symmetrically welded and fixed on the semicircular inner ring (1). A reinforcing rib (3) is welded and fixed on the common circumference between the semicircular inner ring (1) and the semicircular support plate (2). A semicircular outer ring (4) is welded and fixed on the outer edge of the semicircular inner ring (1) and the reinforcing rib (3). The outer surface of the semicircular outer ring (4) is uniformly provided with toothed grooves (5). An end plate (6) is welded and fixed on the straight edge of the semicircular inner ring (1) and between the semicircular outer ring (4) and the semicircular support plate (2). The end plate (6) is welded and fixed to the semicircular outer ring (4) and the semicircular support plate (2). The two semicircular inner rings (1) are combined with each other and fixed by the end plate (6). The end plates (6) are fixedly installed by locking bolts (7).

2. The forged and welded composite large gear according to claim 1, characterized in that: The end plate (6) and the semi-circular inner ring (1) are provided with a semi-circular positioning groove (8). The two semi-circular positioning grooves (8) are matched to form a hole and a positioning cylinder (9) is inserted into the hole. The positioning cylinder (9) is welded and fixed to the end plate (6).

3. The forged and welded composite large gear according to claim 1, characterized in that: The outer extension of the semi-circular inner ring (1) is provided with a weight-reducing groove (10) between the reinforcing ribs (3).

4. The forged and welded composite large gear according to claim 1, characterized in that: The inner semicircular ring (1) has connecting ears (11) welded and fixed on both sides of the reinforcing rib (3). The connecting ears (11) are welded and fixed to the reinforcing rib (3), and the connecting ears (11) are fixedly installed to the outer semicircular ring (4) by connecting bolts (12).

5. A forged and welded composite large gear according to claim 1, characterized in that: The inner end of the straight edge of the semicircular inner ring (1) is provided with a first deformation groove (13).

6. A forged and welded composite large gear according to claim 1, characterized in that: The inner circumference of the semicircular inner ring (1) is provided with mounting holes (14), and four mounting holes (14) are open to form a second deformation groove (15). The two sides of the second deformation groove (15) are symmetrically provided with connecting reinforcing blocks (16) that are welded and fixed to the semicircular inner ring (1).

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