Gear with heat dissipation and lubrication functions

Abstract

The utility model discloses a gear with heat dissipation and lubrication functions, and belongs to the technical field of gear transmission. The gear comprises an outer gear ring, a shaft through hole and a gear radial plate, gear teeth are arranged on the outer gear ring, arc-shaped tooth top grooves are formed in the tooth top faces of the gear teeth, and oil stagnation holes are formed in the bottoms of the arc-shaped tooth top grooves. Tooth side oil guide grooves are formed in the two sides of the gear teeth, tooth bottom oil guide grooves are formed in tooth bottom grooves between the adjacent gear teeth, the oil stagnation holes and the oil guide grooves are matched to form continuous oil guide tracks, and the lubricating effect is enhanced. Large-area fan-shaped heat dissipation holes are formed in a wheel disk of the gear, and a gear ring bevel angle is arranged at the joint of the outer gear ring and the wheel disk to optimize stress distribution. Through the design of the oil guide structure and the heat dissipation holes, the problems that a traditional gear is uneven in lubrication and poor in heat dissipation are solved, the transmission efficiency of the gear is remarkably improved, and the service life of the gear is remarkably prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gear drive technical field, especially related to a gear with heat dissipation and lubrication function. BACKGROUND

[0002] In mechanical transmission, gear as a key component, its working performance directly affects the stability and life of system. When the traditional gear meshes, the temperature rises due to friction heat, and poor heat dissipation can cause gear deformation, wear and tear and other problems. At the same time, uneven distribution of lubricating oil at the meshing place and easy loss, difficult to continue effective lubrication, further reduce the transmission efficiency and service life of gear. Therefore, an urgent need for a gear structure that can optimize the heat dissipation and lubrication effect. SUMMARY

[0003] The utility model discloses a gear with heat dissipation and lubrication function to solve the problems of the prior art.

[0004] The utility model discloses a gear with heat dissipation and lubrication function, including the outer gear ring, the axle through -hole and the gear web, the outer gear ring is evenly provided with a plurality of gear teeth on the circumference, and the axle through -hole is evenly provided with a plurality of gear teeth on the circumference.

[0005] The gear tooth is provided with an arc-shaped tooth top groove on the tooth top surface, the groove depth of the tooth top groove gradually decreases from the middle to both ends, and an oil retention hole is formed in the groove bottom, and the tooth top groove can form a space for ventilation, heat dissipation and lubrication when the gear tooth meshes.

[0006] The gear web is provided with a plurality of heat dissipation holes around the axle through -hole, and the heat dissipation holes are large-area fan-shaped holes, which further enhance the heat dissipation capacity of the gear.

[0007] In the above-mentioned gear with heat dissipation and lubrication function, the outer gear ring is provided with a gear ring bevel at the joint with the gear web, which optimizes the stress distribution when the gear meshes.

[0008] In the above-mentioned gear with heat dissipation and lubrication function, the axle through -hole is provided with a positioning key groove on one side of the hole wall, and a plurality of fastening splines are evenly arranged on the remaining hole wall except the positioning key groove, and the spline groove formed between adjacent fastening splines has a smaller groove depth than the positioning key groove.

[0009] Compared with the prior art, the gear with the heat dissipation and lubrication functions provided by the utility model can effectively prevent lubricating oil from dropping and losing when the gear is engaged and operated, enhances lubrication effect, and ensures that the gear maintains good lubrication state in long-time operation through the continuous oil guiding track formed by the oil retaining hole, the tooth side oil guiding groove and the tooth bottom oil guiding groove. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is the structural schematic view of the gear with the heat dissipation and lubrication functions;

[0011] Figure 2 is Figure 1 the partial structure enlarged view of the circle A in figure

[0012] Figure 3 is the partial structure sectional view when the gear with the heat dissipation and lubrication functions is engaged;

[0013] In the above figure, 100, outer gear ring; 110, gear tooth; 111, tooth top groove; 112, oil retaining hole; 113, tooth side oil guiding groove; 114, tooth bottom groove; 115, tooth bottom oil guiding groove; 120, gear ring bevel angle; 200, shaft through hole; 210, positioning key groove; 220, fastening spline; 300, gear web; 310, heat dissipation hole. DETAILED DESCRIPTION

[0014] The following is the specific embodiment of the utility model and the technical scheme of the utility model is further described in combination with the drawings, but the utility model is not limited to these embodiments.

[0015] As Figures 1 to 3 shown, the gear with the heat dissipation and lubrication functions comprises an outer gear ring 100, a shaft through hole 200 and a gear web 300.

[0016] The hole wall of the shaft through hole 200 is provided with a positioning key groove 210 on one side, the positioning key groove 210 is used for positioning the installation of the rotating shaft penetrating the gear center, a plurality of fastening splines 220 are uniformly distributed on the remaining hole wall in the circumferential direction, the fastening spline 220 is used for enhancing the stability of the gear and the rotating shaft in the circumferential direction, the spline groove depth between adjacent fastening splines 220 is less than the positioning key groove 210, and the stability of the overall assembly can be ensured.

[0017] The gear web 300 is provided with a plurality of through fan-shaped heat dissipation holes 310 around the shaft through hole 200, the heat dissipation area is increased and the air convection passage is formed, and the gear working temperature is reduced.

[0018] As Figures 2 to 3As shown, the outer ring gear 100 is circumferentially uniformly distributed with a plurality of teeth 110, the top surface of each tooth 110 is provided with an arc-shaped addendum groove 111, the groove depth gradually decreases from the middle to both ends, and the groove bottom is provided with an oil retention hole 112 communicating with the tooth side. Because the lubricating oil has a certain surface tension, when the lubricating oil is added to the gear meshing position, the lubricating oil can be uniformly retained in the oil retention hole 112. When the gear meshes, the ventilation and heat dissipation space can be formed in the addendum groove 111, and the heat dissipation effect of the meshing position is enhanced.

[0019] The middle section of the side wall of the tooth 110 is provided with a tooth side oil guiding groove 113, and the middle section of the tooth bottom groove 114 between adjacent teeth 110 is provided with a tooth bottom oil guiding groove 115. The oil retention hole 112, the tooth side oil guiding groove 113 and the tooth bottom oil guiding groove 115 form a continuous oil guiding track. After the lubricating oil is stored in the oil retention hole 112, the oil is guided to flow along the oil guiding track by the centrifugal force during gear rotation, and the lubricating oil uniformly covers the meshing surface.

[0020] Further, the outer ring gear 100 is provided with a ring gear bevel 120 at the joint with the gear spoke 300, which optimizes the stress distribution during meshing and further improves the gear structure strength.

[0021] The working principle of the utility model is as follows: when the gear rotates, the lubricating oil is temporarily stored through the oil retention hole 112, and flows along the tooth side oil guiding groove 113 and the tooth bottom oil guiding groove 115 under the action of centrifugal force, forming a dynamic oil film; at the same time, the addendum groove 111 and the heat dissipation hole 310 promote air circulation, realizing efficient heat dissipation.

[0022] The specific embodiments described herein are merely illustrative of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the scope defined by the appended claims.

[0023] Although various terms are used frequently in this paper, 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 utility model; any additional limitation is contrary to the spirit of the utility model.

Claims

1. A gear with heat dissipation and lubrication functions, comprising an outer gear ring (100), a shaft through hole (200) and a gear spoke plate (300), wherein the outer gear ring (100) is uniformly provided with a plurality of gear teeth (110) in the circumferential direction; Its features are, The gear teeth (110) have an arc-shaped tooth top groove (111) on their tooth top surface. The depth of the tooth top groove (111) gradually decreases from the middle to both ends, and an oil retention hole (112) is formed at the bottom of the groove. When the gear teeth (110) are meshing, a space for ventilation, heat dissipation and lubrication can be formed in the tooth top groove (111). On the side walls of the gear teeth (110), tooth side oil guide grooves (113) are respectively formed in the middle section, and tooth bottom grooves are formed between adjacent gear teeth (110). (114) A tooth bottom oil groove is provided in the middle section of the tooth bottom groove (114). The oil stagnation hole (112) is configured in conjunction with the tooth side oil groove (113) and the tooth bottom oil groove to form a continuous oil trajectories on the outer gear ring (100). Several heat dissipation holes (310) are uniformly and penetratingly provided around the shaft through hole (200) on the gear spoke plate (300). The heat dissipation holes (310) are presented as a large area fan-shaped hole, which further enhances the heat dissipation capacity of the gear.

2. A gear with heat dissipation and lubrication functions according to claim 1, characterized in that, The external gear ring (100) has a circumferentially circumferentially shaped gear ring helix (120) at the junction with the gear spoke (300) to optimize the force distribution during gear meshing.

3. A gear with heat dissipation and lubrication functions according to claim 1, characterized in that, The shaft through hole (200) has a positioning keyway (210) on one side of the hole wall, and a number of fastening splines (220) are evenly provided on the remaining hole walls except for the positioning keyway (210). The depth of the spline groove formed between adjacent fastening splines (220) is less than the depth of the positioning keyway (210).

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