A kind of mosaic gear structure, gear pair and transmission mechanism

Abstract

The utility model belongs to the field of transmission technology, concretely relates to a kind of inserted gear structure, gear pair and transmission mechanism.It includes: first gear, first helical tooth is arranged on its tooth surface, annular step groove is opened in the tooth surface of first gear along the circumference, the end surface of first gear is communicated with one side of step groove, and the side surface of step groove is opened in several connecting holes with circumferential interval;Gear ring is matched and connected in step groove, second helical tooth is arranged on the tooth surface of gear ring, and the end surface of gear ring is opened in several through holes corresponding with connecting hole with circumferential interval;Fastener is fastened and connected through through hole and connecting hole.The utility model is used to solve the problem of higher cost of herringbone tooth hobbing processing.Processing profile helical tooth on first gear and gear ring respectively, utilize first gear and gear ring to assemble the tooth profile structure required, first gear is matched in it by the way of opening groove, overall drive transmission is realized by first gear, and the integrity is better.

Description

Technical Field

[0001] This utility model belongs to the field of transmission technology, specifically relating to an inlaid gear structure, gear pair and transmission mechanism. Background Technology

[0002] A gear is a mechanical component with teeth on its rim that can continuously mesh to transmit motion and power. A herringbone gear is a type of gear with a double-helix symmetrical structure, consisting of helical teeth with opposite left and right helical directions aligned along a central plane. It is a key component in industrial transmission systems used for heavy-duty and high-efficiency power transmission.

[0003] Currently, there are two main methods for machining herringbone gears: hobbing and milling. Milling typically uses a milling cutter and is suitable for large-module, complex herringbone gears. However, due to the low precision of milling, herringbone gears cannot achieve a precise involute tooth profile. Hobbing, on the other hand, involves hobbing the left and right helical teeth in two separate clamping operations. Hobbing also requires a large relief groove, resulting in high processing costs and a large structure. Therefore, there is an urgent need for a low-cost, non-standard gear structure. Utility Model Content

[0004] To address the shortcomings of existing technologies, an inlaid gear structure is provided to solve the problems of high cost and production difficulties in hobbing herringbone gears.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A spliced ​​gear structure, comprising: The first gear has a first helical tooth on its tooth surface. The tooth surface of the first gear has an annular stepped groove in the circumferential direction. One side of the stepped groove is connected to the end face of the first gear. Several connecting holes are spaced apart in the circumferential direction on the side of the stepped groove. A toothed ring is fitted into the stepped groove. The toothed ring has a second helical tooth on its tooth surface and a plurality of through holes corresponding to the connecting hole are spaced apart circumferentially on its end face. Several fasteners are fastened to the connecting hole through the through hole.

[0006] Compared with existing technologies, the above technical solutions have the following beneficial effects: Helical teeth are machined onto the first gear and the gear ring respectively. The first gear and the gear ring are then assembled to form the required tooth structure, which greatly reduces the processing difficulty and cost, and makes it easier to improve the processing accuracy. The first gear is slotted to fit the gear ring into it to form the required tooth surface structure. During driving, the first gear is connected to the drive shaft to drive the first gear to rotate, resulting in good overall integrity. If one half of the gear structure formed by the inlay is damaged, only one half needs to be replaced, which greatly saves costs for large and heavy-duty applications.

[0007] Based on the above technical solution, the embodiments of this application can be improved as follows: In one embodiment, the through hole is formed at the junction of the gear ring and the first gear. The through hole includes a first slot formed on the end face of the first gear and a second slot formed on the end face of the gear ring. The first slot and the second slot are joined together to form the through hole.

[0008] By placing the through hole at the joint, the fastener inserted into the through hole can simultaneously engage with both the gear ring and the first gear, thereby improving the overall stability.

[0009] In one embodiment, the connecting hole is opened along the axial direction of the first gear, the connecting hole corresponds to the through hole, and the connecting hole extends at least partially toward the bottom of the stepped groove.

[0010] Correspondingly, the connecting hole portion is inserted towards the bottom of the groove, so that the connecting hole portion is also located on the side and bottom of the stepped groove, increasing the contact between the fastener side and the connecting hole, and improving the structural strength of the connection.

[0011] In one embodiment, the first helical tooth on the tooth surface of the first gear and the second helical tooth on the tooth surface of the gear ring have different inclination directions, and are used to form a herringbone tooth.

[0012] In one embodiment, the first gear includes: The inner ring has a keyway on its inner wall; The outer ring has the first helical tooth and the stepped groove provided on its outer peripheral surface; Several spokes are provided, with their two ends connected to the outer ring and the inner ring respectively. The spokes are spaced apart circumferentially along the outer wall of the inner ring.

[0013] In one embodiment, reinforcing ribs are also provided on both sides of the spokes, and the two ends of the reinforcing ribs are respectively connected to the inner ring and the outer ring.

[0014] In one embodiment, the fastener includes a plurality of locating pins and a plurality of connecting bolts, wherein the locating pins and the connecting bolts are circumferentially spaced apart.

[0015] This embodiment also discloses a gear pair, which includes the inlaid gear structure as described above; The second gear has a third helical tooth on its tooth surface that matches the first helical tooth; The third gear is coaxially arranged with the second gear, and the tooth surface of the third gear is provided with a fourth helical tooth that meshes with the second helical tooth.

[0016] This embodiment also discloses a transmission mechanism, which includes: a gear pair as described above; A drive shaft, on which a second gear and a third gear are sequentially keyed; An end cap is disposed at the end of the drive shaft, and the end of the end cap is pressed against the outer end face of the gear pair; A baffle is disposed on the side of the drive shaft away from the end cover, and clamps the end cover at both ends of the gear pair. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the first gear in the middle.

[0020] Figure 3 for Figure 2 A front view structural diagram.

[0021] Figure 4 for Figure 1 A schematic diagram of the structure of the central toothed ring.

[0022] Figure 5 for Figure 4 A front view structural diagram.

[0023] Figure 6 This is a schematic diagram of the transmission mechanism in this utility model.

[0024] Figure label: 1. First gear; 2. Gear ring; 3. First helical gear; 4. Second helical gear; 5. Step groove; 6. Connecting hole; 7. Through hole; 8. Fastener; 9. First slot; 10. Second slot; 101. Inner ring; 102. Outer ring; 103. Spokes; 104. Reinforcing ribs; 11. Second gear; 12. Third gear; 13. Third helical gear; 14. Fourth helical gear; 15. Drive shaft; 16. End cover; 17. Baffle. Detailed Implementation

[0025] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention. It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0026] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Example 1 like Figure 1-5 As shown, the present invention provides an inlaid gear structure, which includes: a first gear 1, a gear ring 2 and several fasteners 8.

[0030] like Figure 1 , 2 As shown, a first helical tooth 3 is provided on the tooth surface of the first gear 1. An annular stepped groove 5 is formed circumferentially on the tooth surface of the first gear 1. One side of the stepped groove 5 connects to the end face of the first gear 1, meaning the stepped groove 5 occupies one side of the width of the tooth surface of the first gear 1, and the first helical tooth 3 occupies the other side of that width. Several connecting holes 6 are spaced circumferentially on the side of the stepped groove 5. A toothed ring 2 is fitted into the stepped groove 5. Figure 1 , 4As shown, the toothed ring 2 is provided with a second helical tooth 4, such that the second helical tooth 4 and the first helical tooth 3 each occupy one side of the toothed surface of the first gear 1, which facilitates the formation of complex irregular teeth by using the first helical tooth 3 and the second helical tooth 4 respectively. The end face of the toothed ring 2 is provided with a plurality of through holes 7 corresponding to the connecting hole 6 at intervals along the circumference. A plurality of fasteners 8 pass through the through holes 7 and are fastened to the connecting hole 6, and the toothed ring 2 and the first gear 1 are then fixed circumferentially by the fasteners 8.

[0031] Profile helical teeth are machined on the first gear 1 and the gear ring 2 respectively. The first gear 1 and the gear ring 2 are assembled to form the required tooth structure. The first gear 1 is fitted with the gear ring 2 by opening a slot. The overall drive transmission is achieved by the first gear 1, and the overall integrity is good.

[0032] like Figure 2 , 5 As shown, to ensure the stability of the connection between the gear ring 2 and the first gear 1, the through hole 7 is opened at the joint of the gear ring 2 and the first gear 1. The through hole 7 includes a first slot 9 opened on the end face of the first gear 1 and a second slot 10 opened on the end face of the gear ring 2. The first slot 9 and the second slot 10 are closed to form the through hole 7. The through hole 7 is set at the joint, and the first slot 9 and the second slot 10 that make up the through hole 7 are respectively located on the first gear 1 and the gear ring 2. Since the through hole 7 extends from the end face, when the fastener 8 extends into the through hole 7, it can simultaneously contact and cooperate with the slots on the gear ring 2 and the gear. When the entire gear structure rotates, it improves its stability, reduces damage to the fastener 8 due to shearing force, and improves the overall stability.

[0033] Furthermore, the connecting hole 6 is opened along the axial direction of the first gear 1, and the connecting hole 6 corresponds to the through hole 7. Since the connecting hole 6 corresponds to the through hole 7, the connecting hole 6 extends at least partially toward the bottom of the stepped groove 5. By partially inserting the connecting hole 6 into the bottom of the stepped groove 5, the fastener 8 can be inserted into the connecting hole 6 to achieve contact and fixation in both the axial and radial directions. This makes the connecting hole 6 also partially located on the side and bottom of the stepped groove 5, increasing the contact between the side of the fastener 8 and the connecting hole 6, and improving the structural strength of the connection.

[0034] To achieve the assembly of herringbone teeth, the first helical tooth 3 on the tooth surface of the first gear 1 and the second helical tooth 4 on the tooth surface of the tooth ring 2 have different inclination directions to form herringbone teeth. The inclination angles of the first helical tooth 3 and the second helical tooth 4 are symmetrical, thus forming regular herringbone teeth. If irregular herringbone teeth are required, the first helical tooth 3 and the second helical tooth 4 can be set to have different inclination angles, etc.

[0035] The fastener 8 includes several locating pins and several connecting bolts. The locating pins and the connecting bolts are circumferentially spaced. The locating pins are used to circumferentially position the first gear 1 and the gear ring 2. The connecting bolts can connect and fasten the first gear 1 and the gear 2. To facilitate bolt connection and fastening, the through hole 7 and the connecting hole 6 are circumferentially spaced with screw holes and straight holes to accommodate the connecting bolts and locating pins.

[0036] like Figure 3 As shown, in this embodiment, the first gear 1 includes: an inner ring 101, an outer ring 102, and a plurality of spokes 103.

[0037] The inner ring 101 has a keyway on its inner wall for installation and fixation with the drive shaft 15, etc. The outer ring 102 has the first helical tooth 3 and the stepped groove 5 on its outer circumferential surface. That is, the stepped groove 5 is opened on the outer circumferential surface of the outer ring 102 and occupies half of the width of the outer ring 102. The toothed ring 2 is used to fill the half of the gap. The second helical tooth 4 on the toothed ring 2 cooperates with the first helical tooth 3 on the outer ring 102 to form the required tooth structure.

[0038] Several spokes 103 are connected at both ends to the outer ring 102 and the inner ring 101, respectively. Several spokes 103 are arranged circumferentially along the outer wall of the inner ring 101. One end of the spokes 103 is connected to the inner wall of the outer ring 102, and the other end of the spokes 103 is connected to the outer wall of the inner ring 101.

[0039] In this embodiment, reinforcing ribs 104 are also provided on both sides of the spoke 103. The two ends of the reinforcing ribs 104 are respectively connected to the inner ring 101 and the outer ring 102. Through the reinforcing ribs 104 and the spoke 103 itself, a cross-shaped structure can be formed, which can strengthen the overall structure.

[0040] Example 2 like Figure 6 As shown, this embodiment also discloses a gear pair, which includes the interlocking gear structure as in Embodiment 1, and a second gear 11 and a third gear 12.

[0041] The second gear 11 has a third helical tooth 13 that matches the first helical tooth 3 on its tooth surface. The third gear 12 is coaxially arranged with the second gear 11. The third gear 12 has a fourth helical tooth 14 that meshes with the second helical tooth 4 on its tooth surface.

[0042] The second gear 11 and the third gear 12 are respectively connected to the first gear 1 and the gear ring 2 to form a gear pair that meshes with each other. The centers of the second gear 11 and the third gear 12 can be connected to the shaft by key connection to realize transmission.

[0043] Example 3 like Figure 6As shown, this embodiment also discloses a transmission mechanism, which includes: a gear pair and transmission shaft 15, end cover 16 and baffle 17 as in embodiment 2.

[0044] The drive shaft 15 is sequentially keyed with a second gear 11 and a third gear 12. A baffle 17 and an end cover 16 are respectively disposed on both sides of the second gear 11 and the third gear 12 to fix the two gears. Specifically, the end cover 16 is disposed at the end of the drive shaft 15 and is fixed to the end of the drive shaft 15 by bolts. The end of the end cover 16 is pressed against the outer end face of the gear pair to prevent the second gear 11 and the third gear 12 from sliding out of the end of the drive shaft 15.

[0045] Meanwhile, the baffle 17 is fitted onto the transmission shaft 15 on the side away from the end cover 16, and clamps the two ends of the gear pair with the end cover 16, thereby restricting the second gear 11 and the third gear 12, so that the two gears can mesh with the inlaid gear structure respectively.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A type of interlocking gear structure, characterized in that, include: The first gear has a first helical tooth on its tooth surface. The tooth surface of the first gear has an annular stepped groove in the circumferential direction. One side of the stepped groove is connected to the end face of the first gear. Several connecting holes are spaced apart in the circumferential direction on the side of the stepped groove. A toothed ring is fitted into the stepped groove. The toothed ring has a second helical tooth on its tooth surface and a plurality of through holes corresponding to the connecting hole are spaced apart circumferentially on its end face. Several fasteners are fastened to the connecting hole through the through hole.

2. The split gear structure according to claim 1, wherein The through hole is formed at the junction of the gear ring and the first gear. The through hole includes a first slot formed on the end face of the first gear and a second slot formed on the end face of the gear ring. The first slot and the second slot are joined together to form the through hole.

3. The split gear structure according to claim 2, wherein The connecting hole is opened along the axial direction of the first gear, the connecting hole corresponds to the through hole, and the connecting hole extends at least partially toward the bottom of the stepped groove.

4. The split gear structure according to claim 1, wherein The first helical tooth on the tooth surface of the first gear has a different inclination direction from the second helical tooth on the tooth surface of the gear ring, and is used to form a herringbone tooth.

5. The split gear structure according to claim 1, wherein The first gear includes: The inner ring has a keyway on its inner wall; The outer ring has the first helical tooth and the stepped groove provided on its outer peripheral surface; Several spokes are provided, with their two ends connected to the outer ring and the inner ring respectively. The spokes are spaced apart circumferentially along the outer wall of the inner ring.

6. The split gear structure according to claim 5, wherein The spokes are also provided with reinforcing ribs on both sides, and the two ends of the reinforcing ribs are respectively connected to the inner ring and the outer ring.

7. The split gear structure according to claim 5, wherein The fastener includes a plurality of locating pins and a plurality of connecting bolts, wherein the locating pins and the connecting bolts are circumferentially spaced apart.

8. A gear pair, characterized by Including the inlaid gear structure as described in any one of claims 1-7; The second gear has a third helical tooth on its tooth surface that matches the first helical tooth; The third gear is coaxially arranged with the second gear, and the tooth surface of the third gear is provided with a fourth helical tooth that meshes with the second helical tooth.

9. A transmission mechanism, characterised in that, include: The gear pair as described in claim 8; A drive shaft, on which a second gear and a third gear are sequentially keyed; An end cap is disposed at the end of the drive shaft, and the end of the end cap is pressed against the outer end face of the gear pair; A baffle is disposed on the side of the drive shaft away from the end cover, and is clamped to both ends of the gear pair with the end cover.

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