Lightweight powder metallurgy gear assembly convenient to produce and capable of strengthening lubrication and heat dissipation

Abstract

The light-weight powder metallurgy gear assembly is composed of a first gear single body, a second gear single body, a rubber plug column, a screw and a nut, each gear single body comprises an inner ring, an outer ring and a connecting blade, and an oil storage groove, an oil guide groove, a rubber plug column moving groove and an oil outlet groove are formed in each outer ring. And the structure is simple, lubrication heat dissipation strengthening and light weight are facilitated, large-scale production and manufacturing through the powder metallurgy technology are facilitated, and the advantage of low cost of large-scale production of the powder metallurgy technology can be brought into play.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder metallurgy gears and relates to a lightweight powder metallurgy gear component which is easy to produce and has enhanced lubrication and heat dissipation. Background Art

[0002] Gears are important transmission components in the field of mechanical transmission. They have the advantages of high efficiency, compact structure and stable transmission ratio. They are widely used in mechanical devices such as vehicles and machine tools. Powder metallurgy is a process technology that uses metal or metal powder (or a mixture of metal powder and non-metallic powder) as raw material, and then forms and sinters it to manufacture metal materials, composites and various types of products. Powder metallurgy gears are the product of high-tech with low chip removal and no chip removal. Powder metallurgy gears are powder metallurgy parts commonly used in various automobiles and motorcycles. Through a one-time forming and finishing process, no other post-processing processes are required, and dimensional accuracy requirements, especially tooth profile accuracy, can be fully achieved. Therefore, compared with manufacturing using traditional mechanical processing methods, both material input and manufacturing are greatly reduced, making it suitable for mass production and having the advantage of low cost.

[0003] Generally, for powder metallurgy gears, some gears tend to generate a lot of heat during use. If the heat is not dissipated in time, it is easy to cause gear damage or other consequences. Some gears require external lubricating oil during use, but the lubrication effect of existing gears is poor and lubricating oil needs to be added frequently, affecting the efficiency of equipment use. For example, the prior art patent document CN 215861615 U proposes a high-efficiency heat dissipation powder metallurgy gear, including a gear body, a cooling channel is opened inside the gear body, and the cooling channel is filled with cooling lubricating liquid. The outer wall of the gear body is opened with a plurality of evenly distributed first liquid outlet holes, and the other ends of the plurality of first liquid outlet holes are connected to the cooling channel. The inner wall of the gear body is opened with a plurality of evenly distributed second liquid outlet holes, and the other ends of the plurality of second liquid outlet holes are connected to the cooling channel. The front and rear end surfaces of the gear body are opened with a plurality of evenly distributed weight reduction holes, and the middle part of the front end surface of the weight reduction hole above the front end surface is connected to the liquid inlet pipe, thereby achieving the effect of using the cooling lubricating liquid carried by the gear body to lubricate and cool the gear during operation, reducing friction between the meshing tooth surfaces and improving the service life of the gear. In actual production applications, the cooling channels within the powder metallurgy gear body, the multiple evenly distributed first liquid outlets on the outer wall of the gear body, and the multiple evenly distributed second liquid outlets on the inner wall of the gear body are too complex to be implemented using the powder metallurgy process. This requires post-processing, which increases costs, hinders manufacturing, and undermines the low-cost advantage of the powder metallurgy process. Some gears also suffer from excessive weight and insufficient lightweighting during use, resulting in excessive weight and loud noise.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] In response to the above-mentioned defects of the prior art, the purpose of the present invention is to provide a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce, aiming to solve the problems raised in the above-mentioned background technology, such as poor heat dissipation, poor lubrication, excessive weight, overly complex structure, inconvenient production and manufacturing, which weakens the low-cost advantage of the powder metallurgy process.

[0006] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0007] The lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation, which is easy to produce, comprises a first gear monomer, a second gear monomer, a rubber plug, four screws and four nuts.

[0008] The first gear unit and the second gear unit both include an inner ring and an outer ring.

[0009] An axial hole is provided in the middle of the inner ring, and a keyway is provided on the inner wall of the axial hole of the inner ring.

[0010] An annular oil storage tank is provided on the outer ring, the oil storage tank of the outer ring is provided with a first chamfer close to the inner ring side, and the oil storage tank of the outer ring is provided with a second chamfer away from the inner ring side, four oil filling holes are evenly provided on the oil storage tank of the outer ring, a plurality of teeth are provided on the outer circumference of the outer ring, and a plurality of semi-cylindrical oil guide grooves, semi-cylindrical rubber plug movable grooves and semi-cylindrical oil outlet grooves are provided from the inside to the outside between the oil storage tank of the outer ring and the root of the teeth.

[0011] Four connecting blades are evenly arranged between the inner ring and the outer ring, and the connecting blades are arranged obliquely.

[0012] The rubber stopper comprises a first cylinder and a second cylinder. The end of the first cylinder of the rubber stopper away from the second cylinder is provided with a chamfer, the diameter of the first cylinder of the rubber stopper is smaller than the cross-sectional diameter of the oil outlet groove of the outer ring, the length of the first cylinder of the rubber stopper is greater than the length of the oil outlet groove of the outer ring, a supporting foot is provided on the side of the second cylinder of the rubber stopper away from the first cylinder, the diameter of the second cylinder of the rubber stopper is smaller than the cross-sectional diameter of the rubber stopper movable groove of the outer ring and greater than the cross-sectional diameter of the oil outlet groove of the outer ring and greater than the cross-sectional diameter of the oil guide groove of the outer ring, the sum of the length of the second cylinder of the rubber stopper and the supporting foot is equal to the length of the rubber stopper movable groove of the outer ring, the material of the first cylinder of the rubber stopper is rigid iron, and the material of the second cylinder of the rubber stopper is elastic rubber.

[0013] The annular oil storage groove, semi-cylindrical oil guide groove, semi-cylindrical rubber plug movable groove and semi-cylindrical oil outlet groove of the first gear monomer are arranged on the upper side of the first gear monomer, and the annular oil storage groove, semi-cylindrical oil guide groove, semi-cylindrical rubber plug movable groove and semi-cylindrical oil outlet groove of the second gear monomer are arranged on the lower side of the second gear monomer.

[0014] The connecting blades of the first gear unit and the connecting blades of the second gear unit have the same inclination angle.

[0015] The beneficial effects are: the four screws of the utility model, a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce, pass through the four oil filling holes of the first gear monomer and the second gear monomer, and four nuts, to combine the first gear monomer and the second gear monomer together to assemble into a gear assembly, and the transmission shaft passes through the shaft hole of the inner ring and is installed with a key to transmit power.

[0016] The annular oil storage groove, semi-cylindrical oil guide groove, semi-cylindrical rubber plug movable groove and semi-cylindrical oil outlet groove of the first gear monomer are arranged on the upper side of the first gear monomer, and the annular oil storage groove, semi-cylindrical oil guide groove, semi-cylindrical rubber plug movable groove and semi-cylindrical oil outlet groove of the second gear monomer are arranged on the lower side of the second gear monomer. After assembly, an annular oil storage tank cavity, a cylindrical oil guide tank cavity, a cylindrical rubber plug movable tank cavity and a cylindrical oil outlet tank cavity are formed.

[0017] The first cylinder of the rubber plug is installed in the cylindrical oil outlet groove cavity, and the second cylinder of the rubber plug is installed in the cylindrical rubber plug movable groove cavity.

[0018] The utility model discloses a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce. Before working, lubricating oil is added to the annular oil storage groove of the first gear monomer and the annular oil storage groove of the second gear monomer through four oil filling holes. The lubricating oil in the oil storage groove cavity is formed by assembling the semi-cylindrical oil guide groove of the first gear monomer and the semi-cylindrical oil guide groove of the second gear monomer, and the gap between the supporting feet arranged on the side of the second cylinder of the rubber plug away from the first cylinder. The rubber plugger movable groove and the semi-cylindrical rubber plugger movable groove of the second gear monomer are assembled to form a cylindrical rubber plugger movable groove cavity. The oil storage groove of the outer ring is provided with a first chamfer close to the inner ring side, and the oil storage groove of the outer ring is provided with a second chamfer away from the inner ring side, which is conducive to the lubricating oil flowing from the oil storage tank cavity to the oil guide tank cavity under the action of centrifugal force. Since the sum of the lengths of the second cylinder of the rubber plugger and the supporting foot is equal to the length of the rubber plugger movable groove of the outer ring, the diameter of the second cylinder of the rubber plugger is larger than the cross-sectional diameter of the oil outlet groove of the outer ring, and the lubricating oil will not flow out through the oil outlet groove.

[0019] The utility model discloses a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce. During the gear meshing operation, the first cylinder of the rubber plug is squeezed by the teeth of another gear and moves toward the inner ring, thereby squeezing the second cylinder of the rubber plug, causing the second cylinder of the rubber plug to undergo elastic deformation, so that the sum of the lengths of the second cylinder of the rubber plug and the supporting foot is less than the length of the rubber plug movable groove of the outer ring. Lubricating oil flows out to the tooth root through the oil outlet groove under the action of centrifugal force, thereby lubricating the meshing gear teeth.

[0020] The utility model discloses a lightweight powder metallurgy gear assembly that is easy to produce and has enhanced lubrication and heat dissipation. Four connecting blades are provided between the inner ring and the outer ring. Through holes are formed between the connecting blades, which are conducive to air flow, enhance heat dissipation, and facilitate the lightweighting of the gear. The connecting blades are inclined, and the inclination angles of the connecting blades of the first gear monomer and the connecting blades of the second gear monomer are consistent. When the gear rotates, the connecting blades promote the flow of surrounding air, thereby enhancing heat dissipation.

[0021] The utility model discloses a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation, the oil filling hole of which is easy to produce and is also a screw mounting hole. The mounting screw and nut not only fix the gear assembly but also seal the oil filling hole. There is no need to open an additional oil filling hole, and the structure is simple.

[0022] The utility model discloses a lightweight powder metallurgy gear assembly that is easy to produce and has enhanced lubrication and heat dissipation. The assembly consists of a first gear monomer, a second gear monomer, a rubber plug, a screw and a nut. Each gear monomer includes an inner ring, an outer ring and connecting blades. The outer ring is provided with an oil storage groove, an oil guide groove, a rubber plug movable groove and an oil outlet groove. The structure is simple, which is conducive to enhanced lubrication and heat dissipation and lightweight, and is convenient for mass production using powder metallurgy technology, which is conducive to giving full play to the advantage of low mass production cost of powder metallurgy technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an exploded schematic diagram of the overall assembly structure of a preferred embodiment of a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce according to the utility model.

[0024] Figure 2 It is a structural schematic diagram of a gear unit of a preferred embodiment of a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation, which is easy to produce, as described in the utility model.

[0025] Figure 3 It is a structural schematic diagram of a rubber plug of a preferred embodiment of a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation, which is easy to produce, according to the utility model.

[0026] Figure 4 This is a schematic diagram of the installation structure of a rubber plug in a preferred embodiment of a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce according to the utility model. DETAILED DESCRIPTION

[0027] The present invention provides a lightweight powder metallurgy gear assembly that is easy to manufacture and has enhanced lubrication and heat dissipation. To make the objectives, technical solutions, and effects of the present invention more clear and explicit, the present invention is described in further detail below. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention.

[0028] Please also see Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ,in, Figure 1 It is an exploded schematic diagram of the overall assembly structure of a preferred embodiment of a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce according to the utility model. Figure 2 It is a structural schematic diagram of a gear unit of a preferred embodiment of a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation, which is easy to produce, as described in the utility model. Figure 3 It is a structural schematic diagram of a rubber plug of a preferred embodiment of a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation, which is easy to produce, according to the utility model. Figure 4 This is a schematic diagram of the installation structure of a rubber plug in a preferred embodiment of a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce according to the utility model.

[0029] The utility model provides a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation, which is easy to produce and comprises a first gear monomer 1, a second gear monomer 2, a rubber plug 3, four screws 4 and four nuts 5.

[0030] The first gear unit 1 and the second gear unit 2 each include an inner ring 11 and an outer ring 12 .

[0031] An axial hole 111 is provided in the middle of the inner ring 11 , and a keyway 112 is provided on the inner wall of the axial hole 111 of the inner ring 11 .

[0032] The outer ring 12 is provided with an annular oil storage groove 121, the oil storage groove 121 of the outer ring 12 is provided with a first chamfer 1211 on the side close to the inner ring 11, and the oil storage groove 121 of the outer ring 12 is provided with a second chamfer 1212 on the side away from the inner ring 11. Four oil filling holes 1213 are evenly provided on the oil storage groove 121 of the outer ring 12, and a plurality of teeth 122 are provided on the outer circumference of the outer ring 12. Between the oil storage groove 121 of the outer ring 12 and the roots of the teeth 122, a plurality of semi-cylindrical oil guide grooves 123, semi-cylindrical rubber plug movable grooves 124 and semi-cylindrical oil outlet grooves 125 are provided from the inside to the outside.

[0033] Four connecting blades 13 are evenly arranged between the inner ring 11 and the outer ring 12 , and the connecting blades 13 are arranged at an angle.

[0034] The rubber plug 3 includes a first cylinder 31 and a second cylinder 32 . The end of the first cylinder 31 of the rubber stopper 3 away from the second cylinder 32 is provided with a chamfer 311, the diameter of the first cylinder 31 of the rubber stopper 3 is smaller than the cross-sectional diameter of the oil outlet groove 125 of the outer ring 12, the length of the first cylinder 31 of the rubber stopper 3 is greater than the length of the oil outlet groove 125 of the outer ring 12, and a supporting foot 321 is provided on the side of the second cylinder 32 of the rubber stopper 3 away from the first cylinder 31. The diameter of the second cylinder 32 of the rubber stopper 3 is smaller than the cross-sectional diameter of the rubber stopper movable groove 124 of the outer ring 12 and greater than the cross-sectional diameter of the oil outlet groove 125 of the outer ring 12 and greater than the cross-sectional diameter of the oil guide groove 123 of the outer ring 12. The sum of the lengths of the second cylinder 32 of the rubber stopper 3 and the supporting foot 321 is equal to the length of the rubber stopper movable groove 124 of the outer ring 12. The material of the first cylinder 31 of the rubber stopper 3 is rigid iron, and the material of the second cylinder 32 of the rubber stopper 3 is elastic rubber.

[0035] The annular oil storage groove 121, the semi-cylindrical oil guide groove 123, the semi-cylindrical rubber plug movable groove 124 and the semi-cylindrical oil outlet groove 125 of the first gear monomer 1 are arranged on the upper side of the first gear monomer 1, and the annular oil storage groove 121, the semi-cylindrical oil guide groove 123, the semi-cylindrical rubber plug movable groove 124 and the semi-cylindrical oil outlet groove 125 of the second gear monomer 2 are arranged on the lower side of the second gear monomer 2.

[0036] The connecting blade 13 of the first gear unit 1 and the connecting blade 13 of the second gear unit 2 have the same inclination angle.

[0037] The working process of this utility model:

[0038] The utility model discloses a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce. The four screws 4 pass through the four oil filling holes 1213 of the first gear monomer 1 and the second gear monomer 2, and the four nuts 5, and the first gear monomer 1 and the second gear monomer 2 are combined together to assemble into a gear assembly. The transmission shaft passes through the shaft hole 111 of the inner ring 11 and a transmission key is installed to transmit power.

[0039] The annular oil storage groove 121, the semi-cylindrical oil guide groove 123, the semi-cylindrical rubber plug movable groove 124 and the semi-cylindrical oil outlet groove 125 of the first gear monomer 1 are arranged on the upper side of the first gear monomer 1, and the annular oil storage groove 121, the semi-cylindrical oil guide groove 123, the semi-cylindrical rubber plug movable groove 124 and the semi-cylindrical oil outlet groove 125 of the second gear monomer 2 are arranged on the lower side of the second gear monomer 2. After assembly, an annular oil storage tank cavity 121, a cylindrical oil guide groove cavity 123, a cylindrical rubber plug movable groove cavity 124 and a cylindrical oil outlet groove cavity 125 are formed.

[0040] The first cylinder 31 of the rubber plug 3 is installed in the cylindrical oil outlet groove 125 , and the second cylinder 32 of the rubber plug 3 is installed in the cylindrical rubber plug movable groove 124 .

[0041] The utility model is a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce. Before working, lubricating oil is added to the annular oil storage tank 121 of the first gear monomer 1 and the annular oil storage tank 121 of the second gear monomer 2 through four oil filling holes 1213. The lubricating oil in the oil storage tank cavity 121 passes through the cylindrical oil guide groove cavity 123 formed by assembling the semi-cylindrical oil guide groove 123 of the first gear monomer 1 and the semi-cylindrical oil guide groove 123 of the second gear monomer 2, and the gap between the supporting foot 321 provided on the side of the second cylinder 32 of the rubber plug 3 away from the first cylinder 31, and enters the semi-cylindrical rubber plug movable groove 124 of the first gear monomer 1. The cylindrical rubber plugger movable groove cavity 124 is assembled with the semi-cylindrical rubber plugger movable groove 124 of the second gear monomer 2. The oil storage groove 121 of the outer ring 12 is provided with a first chamfer 1211 close to the inner ring 11 side, and the oil storage groove 121 of the outer ring 12 is provided with a second chamfer 1212 away from the inner ring 11 side, which is conducive to the lubricating oil flowing from the oil storage tank cavity 121 to the oil guide groove cavity 123 under the action of centrifugal force. Since the sum of the lengths of the second cylinder 32 of the rubber plugger 3 and the supporting foot 321 is equal to the length of the rubber plugger movable groove 124 of the outer ring 12, the diameter of the second cylinder 32 of the rubber plugger 3 is larger than the cross-sectional diameter of the oil outlet groove 125 of the outer ring 12, and the lubricating oil will not flow out through the oil outlet groove.

[0042] The utility model discloses a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce. During the gear meshing operation, the first cylinder 31 of the rubber plug 3 is squeezed by the teeth of another gear and moves toward the inner ring 11, thereby squeezing the second cylinder 32 of the rubber plug 3, causing the second cylinder 32 of the rubber plug 3 to undergo elastic deformation, so that the sum of the lengths of the second cylinder 32 of the rubber plug 3 and the supporting foot 321 is less than the length of the rubber plug movable groove 124 of the outer ring 12. Under the action of centrifugal force, the lubricating oil flows out through the oil outlet groove cavity 125 to the root of the teeth 122, thereby lubricating the meshing gear teeth 122.

[0043] The utility model discloses a lightweight powder metallurgy gear assembly that is easy to produce and has enhanced lubrication and heat dissipation. Four connecting blades 13 are provided between the inner ring 11 and the outer ring 12. Through holes are formed between the connecting blades 13, which is conducive to air flow, enhanced heat dissipation, and conducive to lightweighting of the gear. The connecting blades 13 are inclined, and the inclination angles of the connecting blades 13 of the first gear monomer 1 and the connecting blades 13 of the second gear monomer 2 are consistent. When the gear rotates, the connecting blades 13 promote the flow of surrounding air and enhance heat dissipation.

[0044] The utility model provides a lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce. The oil filling hole 1213 is also the mounting hole for the screw 4. The mounting screw 4 and the nut 5 not only fix the gear assembly but also seal the oil filling hole 1213.

[0045] The utility model discloses a lightweight powder metallurgy gear assembly that is easy to produce and has enhanced lubrication and heat dissipation. The assembly consists of a first gear monomer 1, a second gear monomer 2, a rubber plug 3, a screw 4 and a nut 5. Each gear monomer includes an inner ring 11, an outer ring 12 and a connecting blade 13. The outer ring is provided with an oil storage groove 121, an oil guide groove 123, a rubber plug movable groove 124 and an oil outlet groove 125. The structure is simple, which is conducive to enhanced lubrication and heat dissipation and lightweight, and is convenient for mass production using powder metallurgy technology, which is conducive to giving full play to the advantage of low mass production cost of powder metallurgy technology.

[0046] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A lightweight powder metallurgy gear assembly with enhanced lubrication and heat dissipation that is easy to produce, comprising a first gear unit, a second gear unit, a rubber plug, four screws and four nuts, characterized in that: The first gear monomer and the second gear monomer both include an inner ring and an outer ring, an axial hole is provided in the middle of the inner ring, a keyway is provided on the inner wall of the axial hole of the inner ring, an annular oil storage tank is provided on the outer ring, the oil storage tank of the outer ring is provided with a first chamfer close to the inner ring, the oil storage tank of the outer ring is provided with a second chamfer away from the inner ring, four oil filling holes are evenly provided on the oil storage tank of the outer ring, a plurality of teeth are provided on the outer circumference of the outer ring, and the oil storage tank of the outer ring and the root of the teeth are arranged from the inside to the outside. A plurality of semi-cylindrical oil guide grooves, semi-cylindrical rubber plug movable grooves and semi-cylindrical oil outlet grooves are provided. Four connecting blades are evenly arranged between the inner ring and the outer ring. The connecting blades are inclined. The rubber plug includes a first cylinder and a second cylinder. The end of the first cylinder of the rubber plug away from the second cylinder is provided with a chamfer. The diameter of the first cylinder of the rubber plug is smaller than the cross-sectional diameter of the oil outlet groove of the outer ring. The length of the first cylinder of the rubber plug is greater than the oil outlet groove of the outer ring. The length of the oil groove, the side of the second cylinder of the rubber stopper away from the first cylinder is provided with a supporting foot, the diameter of the second cylinder of the rubber stopper is smaller than the cross-sectional diameter of the rubber stopper movable groove of the outer ring and larger than the cross-sectional diameter of the oil outlet groove of the outer ring and larger than the cross-sectional diameter of the oil guide groove of the outer ring, the sum of the lengths of the second cylinder of the rubber stopper and the supporting foot is equal to the length of the rubber stopper movable groove of the outer ring, the material of the first cylinder of the rubber stopper is rigid iron, and the material of the second cylinder of the rubber stopper is elastic rubber, the annular oil storage groove, semi-cylindrical oil guide groove, semi-cylindrical rubber stopper movable groove and semi-cylindrical oil outlet groove of the first gear monomer are arranged on the upper side of the first gear monomer, the annular oil storage groove, semi-cylindrical oil guide groove, semi-cylindrical rubber stopper movable groove and semi-cylindrical oil outlet groove of the second gear monomer are arranged on the lower side of the second gear monomer, and the inclination angles of the connecting blades of the first gear monomer and the connecting blades of the second gear monomer are consistent.

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