Powder metallurgically formed bimetallic gear

Abstract

The utility model discloses a kind of powder metallurgy formed bimetallic gear, including lower base gear, upper base gear is fixedly arranged at the top of lower base gear, oil injection groove one is opened in the inside of upper base gear, oil injection groove two is opened in the inside of lower base gear, oil injection groove one and oil injection groove two are communicated, oil outlet channel one is penetrated and set in the inside of oil injection groove one, oil outlet channel two is penetrated and set in the inside of oil injection groove two, connection assembly is arranged in the bottom of lower base gear, by oil injection groove one, oil injection groove two, oil outlet channel one and oil outlet channel two, lower base gear and upper base gear can be automatically lubricated, the abrasion of lower base gear and upper base gear is reduced, and using the high ductility of nickel-based alloy and the bidirectional combination of antirust layer and wear layer, avoid the cracking, shedding caused by the difference of thermal expansion coefficient of ceramic layer.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy technology, and in particular to a bimetallic gear formed by powder metallurgy. Background Technology

[0002] Powder metallurgy, as an emerging parts processing method, has gradually permeated all aspects of our production and life. Powder metallurgy products require little or no machining, such as cutting, which can greatly save materials and processing costs and reduce product production costs. Its advantages are particularly obvious in mass production. Metal-based gears refer to gears made of two different metal materials, which are combined together through a specific process to give full play to their respective performance advantages. Such gears are manufactured using powder metallurgy technology.

[0003] In the prior art, application number CN202420764056.3 proposes a powder metallurgy bimetallic base gear. This gear enhances its wear resistance and extends its service life by incorporating an alumina ceramic anti-wear layer. Furthermore, a polyurethane anti-corrosion layer is applied outside the anti-wear layer, further strengthening its wear resistance and corrosion resistance, making it more durable. The use of a threaded ring with a fixing groove facilitates installation and connection. Additionally, different specifications of first and second base gears allow for meshing with external gears of varying sizes, enhancing its versatility.

[0004] However, during the use of the above-mentioned bimetallic base gears, no lubrication mechanism is provided for the bimetallic base gears. The gear meshing requires the use of lubricant. Insufficient lubricant can easily lead to accelerated wear of the bimetallic base gears. Moreover, the use of ceramic anti-wear layer and organic anti-rust layer does not take into account that the ceramic layer may crack or fall off due to the difference in thermal expansion coefficient. Based on the above problems, this application proposes a bimetallic base gear formed by powder metallurgy. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a bimetallic gear formed by powder metallurgy to solve the aforementioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A bimetallic base gear formed by powder metallurgy includes a lower base gear, an upper base gear fixedly disposed on the top of the lower base gear, an oil injection groove 1 inside the upper base gear, an oil injection groove 2 inside the lower base gear, the oil injection groove 1 and the oil injection groove 2 being connected, an oil outlet channel 1 being disposed through the interior of the oil injection groove 1, an oil outlet channel 2 being disposed through the interior of the oil injection groove 2, and a connecting component being disposed at the bottom of the lower base gear.

[0007] Preferably, the connecting assembly includes an externally threaded tube fixedly installed at the bottom of the lower base gear. The surface of the externally threaded tube has an installation groove, and a sealing ring is fixedly installed inside the installation groove. The surface of the externally threaded tube has a fixing groove, and a fixing pin is overlapped inside the fixing groove. A connecting stud is fixedly installed at the end of the fixing pin.

[0008] Preferably, the fixing groove has a structure that is larger at the top and smaller at the bottom, and there are two fixing grooves, which are symmetrically distributed.

[0009] Preferably, the bottom of the lower base gear has a weight reduction hole, the depth of the weight reduction hole is half the height of the lower base gear, the number of weight reduction holes is four, and the four weight reduction holes are distributed in a circular array.

[0010] Preferably, both the lower base gear and the upper base gear are provided with an organic anti-rust layer, the surface of the organic anti-rust layer is provided with a nickel-based alloy transition layer, and the surface of the nickel-based alloy transition layer is provided with a ceramic anti-wear layer.

[0011] Preferably, there are two fixing pins and two connecting studs, and the two fixing pins and two connecting studs are symmetrically distributed. The fixing pins and connecting studs are made of metal.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the bimetallic base gear formed by powder metallurgy can automatically lubricate the lower base gear and the upper base gear through the oil injection groove one, the oil injection groove two, the oil outlet channel one and the oil outlet channel two, reducing the wear of the lower base gear and the upper base gear. Furthermore, by utilizing the high ductility of the nickel-based alloy and the bidirectional bonding between the anti-rust layer and the anti-wear layer, cracking and peeling of the ceramic layer due to the difference in thermal expansion coefficients are avoided. Attached Figure Description

[0013] Figure 1 This is an isometric drawing of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the lower base gear and the upper base gear of this utility model; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a schematic diagram of the connecting component structure of this utility model.

[0014] In the diagram: 1 Lower base gear, 2 Upper base gear, 3 Oil injection groove one, 4 Oil injection groove two, 5, 6 Oil outlet channel two, 7 Organic anti-rust layer, 8 Nickel-based alloy transition layer, 9 Ceramic anti-wear layer, 10 External threaded pipe, 11 Mounting groove, 12 Sealing ring, 13 Fixing groove, 14 Fixing pin, 15 Connecting stud. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example: Refer to Figure 1-4 A bimetallic base gear formed by powder metallurgy includes a lower base gear 1, an upper base gear 2 fixedly disposed on the top of the lower base gear 1, an organic anti-rust layer 7 on the surface of both the lower base gear 1 and the upper base gear 2, a nickel-based alloy transition layer 8 on the surface of the organic anti-rust layer 7, and a ceramic anti-wear layer 9 on the surface of the nickel-based alloy transition layer 8. The organic anti-rust layer 7, the nickel-based alloy transition layer 8, and the ceramic anti-wear layer 9 protect the lower base gear 1 and the upper base gear 2. The organic anti-rust layer 7 enhances the rust resistance of the lower base gear 1 and the upper base gear 2, while the ceramic anti-wear layer 9 enhances the rust resistance of the lower base gear 1 and the upper base gear 2. The wear resistance of the base gear 1 and the upper base gear 2 is improved. Between the organic anti-rust layer 7 and the ceramic anti-wear layer 9, a nickel-based alloy transition layer 8 is added. The high ductility of the nickel-based alloy and the bidirectional bonding between the anti-rust layer and the anti-wear layer are utilized to avoid cracking and peeling of the ceramic layer due to the difference in thermal expansion coefficient. The upper base gear 2 has an oil injection groove 3 inside, and the lower base gear 1 has an oil injection groove 4 inside. The oil injection groove 3 and the oil injection groove 4 are connected. An oil outlet channel 6 is provided through the oil injection groove 3, and an oil outlet channel 5 is provided through the oil injection groove 4. A connecting component is provided at the bottom of the lower base gear 1.

[0017] Specifically, the connecting assembly includes an externally threaded tube 10 fixedly installed at the bottom of the lower base gear 1. The surface of the externally threaded tube 10 has a mounting groove 11, and a sealing ring 12 is fixedly installed inside the mounting groove 11. The surface of the externally threaded tube 10 also has a fixing groove 13, which is wider at the top and narrower at the bottom. There are two fixing grooves 13, symmetrically distributed, and a fixing pin 14 is overlapped inside each fixing groove 13. A connecting stud 15 is fixedly installed at the end of each fixing pin 14. There are two fixing pins 14 and two connecting studs 15, and both are symmetrically arranged. The fixed pin 14 and the connecting stud 15 are both made of metal and are connected to the external shaft through the external threaded tube 10. The external shaft compresses the sealing ring 12 installed in the mounting groove 11. The elasticity of the sealing ring 12 can compensate for the gap of the threaded connection and avoid loosening caused by vibration. The fixed stud is tightened into the external shaft by the fixed pin 14, so that the fixed pin 14 is inserted into the fixed groove 13. The fixed groove 13, which is larger at the top and smaller at the bottom, prevents the fixed pin 14 from axially dislodging after installation. At the same time, it increases the contact area between the fixed pin 14 and the fixed groove 13 and improves the torque transmission capability.

[0018] Specifically, the bottom of the lower base gear 1 is provided with weight reduction holes. The depth of the weight reduction holes is half the height of the lower base gear 1. There are four weight reduction holes, which are distributed in a circular array. The weight reduction holes are located on the non-meshing end face of the lower base gear 1 and away from the upper base gear 2. The four evenly distributed weight reduction holes can reduce the weight of the bimetallic base gear without reducing the strength.

[0019] During use: During the installation of the lower base gear 1 and the upper base gear 2, grease is injected into the interior of the oil injection groove 3 and the oil injection groove 4. When the lower base gear 1 and the upper base gear 2 are in use, the grease in the oil injection groove 3 penetrates to the tooth root of the upper base gear 2 through the oil outlet channel 6, while the grease in the oil injection groove 4 penetrates to the tooth root of the lower base gear 1 through the oil outlet channel 5. The grease lubricates the lower base gear 1 and the upper base gear 2, and also lubricates the gears that are in contact with the lower base gear 1 and the upper base gear 2.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bimetallic base gear formed by powder metallurgy, comprising a lower base gear (1), characterized in that, The lower base gear (1) is fixedly provided with an upper base gear (2). The upper base gear (2) has an oil injection groove (3) inside. The lower base gear (1) has an oil injection groove (4) inside. The oil injection groove (3) and the oil injection groove (4) are connected. The oil injection groove (3) has an oil outlet channel (6) through it. The oil injection groove (4) has an oil outlet channel (5) through it. The lower base gear (1) is provided with a connecting component at its bottom.

2. The bimetallic gear formed by powder metallurgy according to claim 1, characterized in that, The connecting assembly includes an external threaded tube (10) fixedly installed at the bottom of the lower base gear (1). The surface of the external threaded tube (10) is provided with an installation groove (11). A sealing ring (12) is fixedly installed inside the installation groove (11). A fixing groove (13) is provided on the surface of the external threaded tube (10). A fixing pin (14) is overlapped inside the fixing groove (13). A connecting stud (15) is fixedly installed at the end of the fixing pin (14).

3. A bimetallic gear formed by powder metallurgy according to claim 2, characterized in that, The fixing groove (13) has a structure that is larger at the top and smaller at the bottom. There are two fixing grooves (13), and the two fixing grooves (13) are symmetrically distributed.

4. A bimetallic gear formed by powder metallurgy according to claim 1, characterized in that, The bottom of the lower base gear (1) has a weight reduction hole. The depth of the weight reduction hole is half the height of the lower base gear (1). There are four weight reduction holes, and the four weight reduction holes are distributed in a circular array.

5. A bimetallic gear formed by powder metallurgy according to claim 1, characterized in that, Both the lower base gear (1) and the upper base gear (2) are provided with an organic anti-rust layer (7), the surface of the organic anti-rust layer (7) is provided with a nickel-based alloy transition layer (8), and the surface of the nickel-based alloy transition layer (8) is provided with a ceramic anti-wear layer (9).

6. A bimetallic gear formed by powder metallurgy according to claim 2, characterized in that, The number of fixing pins (14) and connecting studs (15) are both two, and the two fixing pins (14) and the two connecting studs (15) are symmetrically distributed. The fixing pins (14) and the connecting studs (15) are both made of metal.

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