Welded eccentric gear structure

Abstract

The utility model discloses a welding type eccentric gear structure which comprises a gear ring, a web plate and an eccentric body assembly, the periphery of the web plate is welded and fixed in an inner hole of the gear ring, and a through rotating shaft hole is formed in the center of the web plate. The eccentric body assembly is provided with a through hole allowing the rotating shaft to penetrate through and comprises an eccentric body, a hub and a supporting body, the hub and the supporting body are welded to the two end faces of the eccentric body respectively, and the hub is welded in a rotating shaft hole; and an eccentric cavity is formed between the eccentric body and the rotating shaft. The structure is formed in a welding mode, so that different eccentric distance requirements can be met through different eccentric body sizes, and the small-batch production requirement of a large press machine is met; and the eccentric cavity provides an optimized space for adjusting the more obvious eccentric effect of the gear, and the material consumption of the eccentric body and the balancing weight is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gear transmission, in particular to a welded eccentric gear structure. Background Art

[0002] Traditional eccentric gears are usually cast as a whole. For the integrally cast eccentric gear, the casting hardness of the eccentric body is not high, the strength of the gear part is low, and it is easy to wear during use, affecting the precision and life of the press; and the casting cycle is long, the eccentric distance cannot be changed, and it is difficult to meet the small batch production needs of large mechanical presses.

[0003] Although the existing welded eccentric gear structure can solve the above technical problems, the eccentric body adopts a ring structure with poor structural strength. Moreover, the eccentric body is an integral structure, and the adjustment and control of the eccentricity are relatively complicated. Especially when a larger eccentricity is required, the size and material strength of the eccentric body will become restrictive factors, which are difficult to balance and optimize in the design. It is also not easy to adjust and optimize the gear to achieve a more obvious eccentric effect. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a welded eccentric gear structure.

[0005] The technical solution of the utility model is: comprising a gear ring, a web and an eccentric body assembly, wherein the outer periphery of the web is welded and fixed in the inner hole of the gear ring, and a through rotating shaft hole is provided in the center of the web;

[0006] The eccentric body assembly has a through hole for the rotating shaft to pass through, including an eccentric body, a hub and a support body respectively welded to the two end surfaces of the eccentric body, and the hub is welded in the rotating shaft hole; an eccentric cavity is provided between the eccentric body and the rotating shaft.

[0007] Furthermore: the welding surface of the hub relative to the eccentric body covers the eccentric cavity.

[0008] Furthermore: the welding surface of the support body and the eccentric body opposite to each other covers the eccentric cavity.

[0009] Furthermore: the webs are provided with two groups, the two groups of webs are parallel and spaced apart in the gear ring and form a hollow chamber between the two groups of webs.

[0010] Furthermore: a plurality of reinforcing sleeves are welded between the two groups of webs, and two ends of the plurality of reinforcing sleeves are respectively passed through the two groups of webs.

[0011] Furthermore: a counterweight is welded in the hollow chamber between the two groups of webs, and the counterweight and the eccentric body are respectively located on both sides of the rotating shaft.

[0012] Furthermore: the counterweight block is provided with a fixing hole for the reinforcing sleeve to pass through, and after the reinforcing sleeve passes through the fixing hole, its two ends are respectively passed through and welded to the two sets of webs.

[0013] Furthermore: the counterweight block is in an arc shape and is arranged close to the inner hole of the gear ring.

[0014] Furthermore: the eccentric body, the hub and the support body are all solid structural parts.

[0015] The beneficial technical effect of the utility model is that the relative end faces of the three entities, the hub, the eccentric body and the support body, are welded respectively into an eccentric body assembly, and the size of the eccentric body can be changed to adapt to different eccentricity requirements and meet the small batch production needs of large presses; and an eccentric cavity is designed between the eccentric body and the rotating shaft, which provides an optimized space for adjusting the gear to have a more obvious eccentric effect, and at the same time reduces the material usage of the eccentric body and the counterweight block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is an exploded schematic diagram of the overall structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the eccentric cavity of the utility model;

[0019] Figure 4 It is a cross-sectional schematic diagram of the utility model;

[0020] Among them: 1. gear ring; 2. web; 3. rotating shaft hole; 4. reinforcement sleeve; 5. counterweight block; 51. fixing hole; 6. eccentric body assembly; 61. eccentric body; 62. wheel hub; 63. support body; 7. eccentric cavity. DETAILED DESCRIPTION

[0021] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0022] like Figure 1-4 As shown, a welded eccentric gear structure includes a gear ring 1 and a web 2, wherein the web 2 is provided with two groups, and the two groups of webs 2 are parallel and spaced apart in the gear ring 1, that is, the outer circles of the two groups of webs 2 are welded and fixed in the inner hole of the gear ring 1, and a hollow chamber is formed between the two groups of webs 2, and the two groups of webs 2 play a role in supporting and fixing the gear ring 1, and the structure of the two groups of webs 2 can better resist tooth lateral load; the centers of the two groups of webs 2 are provided with a through rotating shaft hole 3.

[0023] In order to strengthen the supporting strength between the two groups of webs 2 and prevent the webs 2 from collapsing during the operation of the gear, a number of reinforcing sleeves 4 are welded between the two groups of webs 2. The two ends of the reinforcing sleeves 4 are respectively passed through the two groups of webs 2 and are evenly arranged in a circular shape and fixed between the gear ring 1 and the rotating shaft hole 3.

[0024] Furthermore, a counterweight 5 is provided in the hollow chamber between the two sets of webs 2. The counterweight 5 is arc-shaped and welded to the inner hole of the gear ring 1. The counterweight 5 and the eccentric body are respectively located on opposite sides of the rotating shaft. The counterweight 5 is used to balance the eccentric gear so that the center of gravity of the eccentric gear remains at the center of rotation, so as to effectively improve the stability of the eccentric gear.

[0025] Furthermore, the counterweight block 5 is provided with a fixing hole 51 for the reinforcement sleeve 4 to pass through. After the reinforcement sleeve 4 passes through the fixing hole 51, two ends thereof are respectively passed through and welded to the two sets of webs 2.

[0026] An eccentric body assembly 6 is welded through the rotating shaft hole 3, and the eccentric body assembly 6 includes an eccentric body 61, a wheel hub 62 and a support body 63 respectively welded to the two end faces of the eccentric body 61, and the eccentric body 61, the wheel hub 62 and the support body 63 all have through holes for the rotating shaft to pass through. The outer periphery of the wheel hub 62 is welded and fixed to the two sets of webs 2 in the rotating shaft hole 3, and the wheel hub 62 is used to support the entire eccentric gear. The support body 63 is welded to the two end faces of the eccentric body 61 through the cooperation of the wheel hub 62 to form a clamping of the eccentric body 61, so that the overall structure of the eccentric body assembly 6 is firm and reliable. When the eccentric body assembly 6 rotates with the rotating shaft, the support body 63 and the wheel hub 62 both play a better supporting role.

[0027] Furthermore, the aperture of the through hole of the eccentric body 61 is larger than the aperture of the through hole of the hub 62 and the support body 63, so as to form an eccentric cavity 7 between the eccentric body 61 and the rotating shaft. By increasing the aperture of the through hole of the eccentric body 61, the use of the material of the eccentric body 61 is reduced, thereby reducing the material of the counterweight block 5 for matching balance. When in use, the hub 62 and the support body 63 are connected to the rotating shaft through the inner ring kit, while the eccentric body 61 has no contact with the rotating shaft, thereby reducing the use of the inner ring kit there. In this embodiment, the inner ring kit adopts a copper sleeve.

[0028] Furthermore, the welding surface between the hub 62 and the eccentric body 61 is covered on the through hole of the eccentric body 61. Since the aperture of the through hole of the eccentric body 61 is larger than the aperture of the through hole of the hub 62, the hub 62 has an eccentric structure, which ensures that the outer periphery of the hub 62 and the two groups of webs 2 have sufficient welding surface, and also ensures that the end surface of the hub 62 and the eccentric body 61 relative to each other has sufficient welding surface, so as to make the welding more firm.

[0029] Similarly, the welding surface of the support body 63 covers the through hole of the eccentric body 61 and presents an eccentric structure, so as to ensure that the end surface of the support body 63 and the eccentric body 61 that are in contact with each other has a sufficient welding surface to ensure that the welding is firm.

[0030] In this embodiment, the distance between the central axis of the eccentric body 61 and the central axis of the rotating shaft is defined as the eccentric distance. The design sets an eccentric cavity 7 between the eccentric body 61 and the rotating shaft to make the eccentric distance larger, so as to obtain a more obvious eccentric effect of the gear, and ensure the optimal operating performance of the gear through the balanced cooperation of the counterweight block 5; the eccentric cavity 7 between the eccentric body 61 and the rotating shaft can better adjust and optimize the eccentric effect of the gear.

[0031] In this embodiment, the eccentric body 61, the hub 62 and the support body 63 are all solid structural parts, and are all made of steel plates, which are easy to obtain. After the entities are heat treated before welding, then welded, and then heat treated separately, the strength and hardness of the eccentric body 61, the hub 62 and the support body 63 are higher and the wear resistance is better. In addition, the post-weld heat treatment can also eliminate the welding internal stress to achieve better welding quality.

[0032] Furthermore, the gear ring 1, web 2, reinforcement sleeve 4 and counterweight 5 are made of materials different from the eccentric body assembly 6. When welding the corresponding parts, different heat treatments are performed according to the different materials of each part to meet various functional requirements.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A welded eccentric gear structure, characterized in that: It comprises a gear ring (1), a web (2) and an eccentric body assembly (6); the outer periphery of the web (2) is welded and fixed in the inner hole of the gear ring (1); and a through-going rotating shaft hole (3) is provided in the center of the web (2); The eccentric body assembly (6) has a through hole for the rotating shaft to pass through, and comprises an eccentric body (61), a wheel hub (62) and a support body (63) respectively welded to the two end surfaces of the eccentric body (61), and the wheel hub (62) is welded in the rotating shaft hole (3); an eccentric cavity (7) is provided between the eccentric body (61) and the rotating shaft.

2. A welded eccentric gear structure according to claim 1, characterized in that: The welding surfaces of the hub (62) and the eccentric body (61) facing each other cover the eccentric cavity (7).

3. A welded eccentric gear structure according to claim 1, characterized in that: The welding surfaces of the support body (63) and the eccentric body (61) facing each other cover the eccentric cavity (7).

4. A welded eccentric gear structure according to claim 1, characterized in that: The webs (2) are provided in two groups, and the two groups of webs (2) are arranged in parallel and at intervals in the gear ring (1) to form a hollow chamber between the two groups of webs (2).

5. A welded eccentric gear structure according to claim 4, characterized in that: A plurality of reinforcing sleeves (4) are welded between the two groups of webs (2), and two ends of the plurality of reinforcing sleeves (4) are respectively inserted through the two groups of webs (2).

6. A welded eccentric gear structure according to claim 5, characterized in that: A counterweight (5) is welded in the hollow chamber between the two groups of webs (2), and the counterweight (5) and the eccentric body (61) are respectively located on both sides of the rotating shaft.

7. A welded eccentric gear structure according to claim 6, characterized in that: The counterweight block (5) is provided with a fixing hole (51) for the reinforcing sleeve (4) to pass through. After the reinforcing sleeve (4) passes through the fixing hole (51), its two ends are respectively passed through and welded to the two sets of webs (2).

8. The welded eccentric gear structure according to claim 6, characterized in that: The counterweight block (5) is in an arc shape and is arranged close to the inner hole of the gear ring (1).

9. The welded eccentric gear structure according to claim 1, characterized in that: The eccentric body (61), the wheel hub (62) and the support body (63) are all solid structural parts.

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