High-strength gear

Abstract

The utility model provides a high-strength gear, and belongs to the field of gears. The problem that an existing gear is prone to slipping and dislocation due to too large torque is solved. The high-strength gear comprises a gear body with a tooth part and two transmission shafts used for transmission connection, connecting cavities are symmetrically formed in the two end sides of the gear body, the two transmission shafts are located on the two end sides of the gear body respectively, connecting parts are arranged at the ends of the two transmission shafts, and flange parts axially extend outwards from the centers of the connecting parts. A matching groove is formed in the center of the connecting cavity, the flange part and the matching groove are of a cross-shaped structure and are matched to form radial matching limiting, a plurality of wedge-shaped blocks are distributed in the matching groove in the circumferential direction, a wedge-shaped groove is formed in the connecting part, a plurality of through holes are formed in each wedge-shaped block, and the wedge-shaped blocks and the wedge-shaped groove are in interference fit. And arc chamfers are arranged at the corners of the flange part and the matching groove. The utility model has the advantage of high-strength connection.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gear field relates to a kind of gear, especially to a kind of high-strength gear. BACKGROUND

[0002] Gear is the mechanical element with tooth on rim, can continuously mesh transmission motion and power, the gear currently applied in car, household appliance, smart home product is generally metal gear or plastic gear.

[0003] But whether metal or plastic gear is connected using single flat key, and the connection strength is small, when torque is too large, flat key deformation skid and misplacement are prone to occur, which not only greatly reduces the service life of gear, but also easily causes damage to driving equipment. SUMMARY

[0004] The utility model discloses a kind of high-strength gears to solve the above problems, to solve the above problems.

[0005] The utility model discloses a kind of high-strength gears, characterized in that, including the gear body with tooth part and two transmission shafts for transmission connection, the gear body is symmetrically provided with connecting cavity on both ends sides, two the transmission shafts are located gear body both ends sides, and the end portion of each is provided with the connecting portion matched with connecting cavity;

[0006] Flange portion for radial limiting is axially extended in the center of the connecting portion, and the connecting cavity is provided with a matching groove matched with the flange portion in the center;

[0007] Wherein, the flange portion and the matching groove are provided with cross-shaped structure, and form radial cooperation limiting, the matching groove is distributed with a plurality of wedge-shaped blocks for improving radial connection strength in circumferential direction, and the connecting portion is provided with a plurality of wedge-shaped grooves matched with wedge-shaped blocks, and a plurality of through holes for reducing radial friction are formed in the wedge-shaped blocks;

[0008] The wedge-shaped block and the wedge-shaped groove are interference fit, for transmission shaft and gear body connection fixed;

[0009] The corner of the flange portion and the matching groove is provided with arc chamfer, to facilitate transmission shaft connection, reduce radial transmission stress and facilitate disassembly and installation.

[0010] In the above high-strength gear, the connecting cavity and the connecting portion can be disc type, or square form structure is arranged, and the through hole for facilitating disassembly is arranged in the center of the matching groove, which can also be used to reduce the counterweight of gear body, to realize light weight.

[0011] In the high-strength gear, the plurality of wedges are integrally formed with the gear body and symmetrically distributed in the inner wall of the matching groove, and the height of the wedges is higher than the depth of the matching groove and matches with the wedge-shaped groove.

[0012] In the high-strength gear, the connecting part is integrally formed with the transmission shaft, so that the transmission connection strength is improved.

[0013] Compared with the prior art, the high-strength gear has the following advantages:

[0014] 1. The radial limiting is realized by the matching of the cross-shaped flange part and the matching groove, the double locking is realized by the wedge-shaped interference matching, the torsional capacity is significantly improved, the stress concentration in the transmission process is reduced by the circular arc chamfer design, and the high-strength connection of the transmission shaft and the gear is realized to the greatest extent.

[0015] 2. The through hole in the center of the matching groove reduces the weight of the gear body, the circular arc chamfer facilitates the quick installation and disassembly of the transmission shaft, the standardized connecting cavity and the transmission shaft interface design support quick replacement and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is an exploded three-dimensional structure schematic diagram of the high-strength gear.

[0017] Figure 2 is a partial cross-sectional structure schematic diagram of the matching part of the wedge-shaped block and the wedge-shaped groove of the high-strength gear.

[0018] In the figure, 1 is a gear body, 2 is a transmission shaft, 3 is a connecting part, 4 is a connecting cavity, 5 is a flange part, 6 is a matching groove, 7 is a wedge-shaped block, 8 is a wedge-shaped groove, 9 is a through hole, 10 is a circular arc chamfer, and 11 is a through hole. DETAILED DESCRIPTION

[0019] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0020] As Figure 1 , Figure 2As shown, the high-strength gear includes a gear body 1 with a tooth portion and two transmission shafts 2 for transmission connection, the gear body 1 is symmetrically provided with a connecting cavity 4 at both ends, the two transmission shafts 2 are respectively located at both ends of the gear body 1, and the end portions are provided with a connecting portion 3 matched with the connecting cavity 4, an outwardly extending flange portion 5 for radial limiting is arranged at the center of the connecting portion 3, a matching groove 6 matched with the flange portion 5 is arranged at the center of the connecting cavity 4, wherein the flange portion 5 and the matching groove 6 are arranged in a cross-shaped structure and are matched to form radial limiting, a plurality of wedge-shaped blocks 7 for improving the radial connection strength are circumferentially distributed in the matching groove 6, a plurality of wedge-shaped grooves 8 matched with the wedge-shaped blocks are arranged on the connecting portion 3, a plurality of through holes 9 for reducing radial friction are arranged on the wedge-shaped blocks 7, the wedge-shaped blocks 7 and the wedge-shaped grooves 8 are in interference fit, for connecting and fixing the transmission shaft 2 with the gear body 1, and the corners of the flange portion 5 and the matching groove 6 are provided with a circular arc chamfer 10, so as to facilitate the connection of the transmission shaft 2, reduce the radial transmission stress and facilitate disassembly and installation.

[0021] The connecting cavity 4 and the connecting portion 3 can be arranged in a disc type or a square type structure, a through hole 11 for facilitating disassembly is arranged at the center of the matching groove 6, the through hole 11 can also be used to reduce the weight of the gear body 1, realize light weight, the plurality of wedge-shaped blocks are integrally formed with the gear body 1 and are symmetrically distributed on the inner wall of the matching groove 6, the height of the wedge-shaped blocks is higher than the groove depth of the matching groove 6, and the wedge-shaped blocks are matched with the wedge-shaped grooves, the connecting portion 3 is integrally formed with the transmission shaft 2, so as to facilitate improving the transmission connection strength.

[0022] The cross-shaped flange portion 5 and the matching groove 6 are matched to realize radial limiting and double locking through wedge-shaped interference fit, the torsional resistance is significantly improved, the circular arc chamfer 10 reduces stress concentration in the transmission process, and the transmission shaft 2 is connected with the gear in high strength to a great extent.

[0023] The through hole 11 at the center of the matching groove 6 reduces the weight of the gear body 1, the circular arc chamfer 10 facilitates quick installation and disassembly of the transmission shaft 2, the standardized connecting cavity 4 and the transmission shaft 2 interface design support quick replacement and maintenance.

[0024] The interference fit of the wedge-shaped blocks 7 and the wedge-shaped grooves 8 is locked through deformation, combined with the through holes 9 to reduce friction, and stable connection under high torque is ensured.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0026] Although the terms are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; it is against the spirit of the present application to interpret them as any kind of additional limitation.

Claims

1. A high-strength gear characterized by, The utility model provides a gear body (1) with a gear part and two transmission shafts (2) for transmission connection, the gear body (1) is symmetrically provided with a connecting cavity (4) on both end sides, and the two transmission shafts (2) are located at both end sides of the gear body (1), and the end of each transmission shaft is provided with a connecting part (3) matched with the connecting cavity (4). A flange part (5) for radial limiting extends axially outward from the center of the connecting part (3), and a matching groove (6) is formed in the center of the connecting cavity (4) and matched with the flange part (5). The flange part (5) and the matching groove (6) are both provided in a cross structure and matched to form radial matching limiting, a plurality of wedge-shaped blocks (7) for improving the radial connection strength are distributed circumferentially in the matching groove (6), the connecting part (3) is provided with a plurality of wedge-shaped grooves (8) matched with the wedge-shaped blocks, and a plurality of through holes (9) for reducing radial friction are formed in the wedge-shaped blocks (7). The wedge-shaped blocks (7) and the wedge-shaped grooves (8) are in interference fit, used for connecting and fixing the transmission shaft (2) and the gear body (1). The corners of the flange part (5) and the matching groove (6) are provided with arc chamfers (10), facilitating the connection of the transmission shaft (2), reducing radial transmission stress and facilitating disassembly and installation.

2. A high strength gear as defined in claim 1, wherein The connecting cavity (4) and the connecting part (3) can be provided in a disc type or a square form structure, and a through hole (11) for facilitating disassembly is formed in the center of the matching groove (6), which can also be used to reduce the weight of the gear body (1) and realize light weight.

3. A high strength gear as defined in claim 1, wherein A plurality of wedge-shaped blocks are integrally formed with the gear body (1) and symmetrically distributed on the inner wall of the matching groove (6), and the height of the wedge-shaped blocks is higher than the groove depth of the matching groove (6) and matched with the wedge-shaped groove.

4. A high strength gear as defined in claim 1, wherein The connecting part (3) and the transmission shaft (2) are integrally formed, facilitating the improvement of transmission connection strength.

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