Assembling method of triple combined gear

Abstract

The invention discloses an assembling method of a triple combination gear. The assembling method comprises the specific processes of material preparation, assembly A, cooling, assembly B, cooling, copper sleeve pressing, boring and inspection and warehousing. The assembly A specifically comprises the steps that the gear 1 and the gear 3 are assembled, the gear 1 is rapidly cooled to-60 DEG C to-80 DEG C and subjected to heat preservation for 2 hours, then the gear 3 is rapidly heated to 180-220 DEG C through induction, then the gear 3 is taken out at the same time, and the gear 1 is pressed into the gear 3 and fixed. The assembly B specifically comprises the steps that the gear 2 is rapidly heated to 160-180 DEG C through induction, and then the gear 2 and the assembled assembly are pressed and fixed together. Different gears are assembled together in the assembling mode, the precision requirement of the three gears is met, the problem that a combined part is not easy to machine is solved, the machining method is reliable and economical, large torque can be transmitted, and the function of multi-gear driving is achieved.

Description

Technical Field

[0001] This invention relates to a method for assembling a three-linked gear system, belonging to the fields of machining and heat treatment technology. Background Technology

[0002] Gear transmission is one of the most commonly used mechanical transmission methods. Due to its smooth transmission, low vibration and impact, ability to achieve a large transmission ratio with a single stage, and compact structure, it is a very common transmission structure, widely used in home appliances, automobiles, aerospace, and other fields. With the continuous expansion of application areas and the increasingly compact structural requirements of modern mechanical transmissions, especially for components in aerospace, drones, and other products with stringent weight requirements, components must be as lightweight as possible without compromising performance. Therefore, compact gear assemblies are frequently used. And for gear assemblies (such as…) Figure 1 The processing of the triple gear assembly shown should be carried out using economical and reasonable methods, employing the simplest and most economical means to meet the needs of modern production. Summary of the Invention

[0003] The purpose of this invention is to provide a method for assembling a three-unit gear assembly. This method maintains the accuracy of the gear assembly without sacrificing precision. Furthermore, the method is reliable, economical, and requires no additional specialized production equipment; it can be completed using conventional processes. It has high applicability and widespread applicability, meeting the requirements of modern manufacturing for low production costs.

[0004] The technical solution of the present invention is as follows: a method for assembling a three-linked gear assembly, wherein the three-linked gear assembly includes gear 1, gear 2 and gear 3, wherein the lower part of gear 1 is inserted into the inner hole of gear 3, and gear 2 is sleeved on the upper outer circumference of gear 3. The specific process is assembly A → cooling → assembly B → cooling → pressing copper sleeve → boring → inspection and warehousing; assembly A specifically involves assembling gear 1 and gear 3. First, gear 1 is rapidly cooled to -60 to -80°C and kept at that temperature for 2 hours. Then, gear 3 is rapidly heated by induction to 180 to 220°C. Then, both gears are removed simultaneously, and gear 1 is pressed into gear 3 and fixed in place. Assembly B specifically involves rapidly heating gear 2 by induction to 160 to 180°C. Then, gear 2 is pressed into the assembled components and fixed together.

[0005] In the aforementioned method for assembling a triple-gear assembly, during assembly A, the interference fit between gear 1 and gear 3 is 0.08-0.12 mm.

[0006] In the aforementioned method for assembling a triple-gear combination, the cooling process involves placing the assembled components on a flat plate for air cooling aging for more than 24 hours.

[0007] In the aforementioned method for assembling a triple-gear assembly, during assembly B, the interference fit between gear 2 and gear 3 is 0.15-0.20 mm.

[0008] In the aforementioned method for assembling a triple-gear assembly, the copper sleeve is press-fitted directly into the gear assembly by processing the copper sleeve.

[0009] In the aforementioned method for assembling a triple-gear assembly, the boring process involves precision boring of the inner hole of the copper bushing to control the cylindricity and roughness of the inner hole.

[0010] In the aforementioned method for assembling a triple-gear combination, the inspection and warehousing process involves inspecting the components, cleaning the oil seals, and then packaging and warehousing them.

[0011] The beneficial effects of the present invention are as follows: Compared with the prior art, the present invention assembles different gears together through the above-mentioned assembly method, which meets the precision requirements of three gears, solves the problem of difficult processing of the assembled parts, and the assembly method is reliable, economical, can transmit large torque, and realize the function of multi-gear drive. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a three-linked gear system. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0014] An embodiment of the present invention: A method for assembling a three-gear assembly. The three-gear assembly consists of three gears made of different materials and a bushing, assembled together by interference fit of the parts' own structures. Gear 1 is inserted into the inner hole of gear 3 at its lower part, and gear 2 is sleeved on the outer circumference of the upper end of gear 3. By using the special process method of the present invention, the three gears are assembled together to achieve the function of simultaneously meshing with different gears to transmit motion. The three gears are made of different materials: gears 1 and 3 are made of medium carbon alloy steel, with a hardness of 28-32 HRC after heat treatment, and the teeth are shaved and nitrided, achieving a precision of grade 7; gear 2 is made of low carbon alloy steel, fully carburized and then ground, achieving a precision of grade 6; the bushing is an alloy copper bushing for wear resistance. After the three gear parts are completed separately, they are assembled using the method of this scheme. The gear precision is not reduced, the processing method is reliable and economical, and it can transmit a large torque.

[0015] The specific process is as follows: material preparation → assembly A → cooling → assembly B → cooling → pressing copper sleeve → boring → inspection and warehousing; assembly A is to assemble gear 1 and gear 3 together, and assembly B is to assemble the combination of gear 1 and gear 3 with gear 2.

[0016] 1) Material preparation: Gears of different materials and technical requirements are processed according to the drawings. The inner hole of the copper sleeve is reserved with a 0.2mm allowance. After production is completed and the inspection is qualified, the gears are put into the semi-finished product warehouse. The surface is cleaned before assembly.

[0017] 2) Assembly A is as follows: Gear 1 and gear 3 are assembled with an interference fit of 0.08-0.12mm. First, gear 1 is rapidly cooled to -60 to -80℃ and kept warm for 2 hours. Then, gear 3 is rapidly heated by induction to 180 to 220℃. Then, both gears are removed at the same time, and gear 1 is pressed into gear 3 and fixed in place.

[0018] 3) Cooling: Place the press-fitted gear 1 and gear 3 assemblies on a flat plate and air-cool them for more than 24 hours.

[0019] 4) Assembly B is specifically as follows: Induction heat gear 2 is rapidly heated to 160-180℃, and the interference fit between the two is 0.15-0.20mm. Then, gear 2 is press-fitted and fixed together with the assembled components.

[0020] 5) Cooling: Place the assembled components on a flat plate for air cooling aging for more than 24 hours.

[0021] 6) Press-fit copper bushing: The processed copper bushing is directly press-fitted into the gear assembly.

[0022] 7) Boring: Using a CNC lathe with a special fixture, the runout of the assembled components is corrected, and the inner hole of the copper bushing is precision bored to control the cylindricity of the inner hole to be less than 0.008mm and the roughness to be less than Ra0.8.

[0023] 8) Inspection and warehousing: Inspect the components, clean the oil seals, and then package and warehousing them.

Claims

1. A method for assembling a three-linked combination gear, characterized in that: The triple-gear assembly includes gear 1, gear 2, and gear 3. Gear 1 is inserted into the inner hole of gear 3 at its lower part, and gear 2 is sleeved on the outer circumference of the upper end of gear 3. The specific process is as follows: Assembly A → Cooling → Assembly B → Cooling → Pressing copper sleeve → Boring → Inspection and warehousing. Assembly A specifically involves assembling gear 1 and gear 3. First, gear 1 is rapidly cooled to -60 to -80°C and kept at that temperature for 2 hours. Then, gear 3 is rapidly heated by induction to 180 to 220°C. Then, both gears are removed simultaneously, and gear 1 is pressed into gear 3 and fixed in place. Assembly B specifically involves rapidly heating gear 2 by induction to 160 to 180°C. Then, gear 2 is pressed into the assembled components and fixed together.

2. The assembly method of a triple-gear combination according to claim 1, characterized in that: During the assembly process A, the interference fit between gear 1 and gear 3 is 0.08-0.12 mm.

3. The assembly method of a triple-gear combination according to claim 1, characterized in that: The cooling process involves placing the assembled components on a flat plate and air-cooling them for more than 24 hours.

4. The assembly method of a triple-gear combination according to claim 1, characterized in that: During the assembly of B, the interference fit between gear 2 and gear 3 is 0.15-0.20 mm.

5. The assembly method of a triple-gear combination according to claim 1, characterized in that: The copper sleeve is manufactured by directly pressing the copper sleeve into the gear assembly.

6. The assembly method of a triple-gear combination according to claim 1, characterized in that: The boring process involves precision boring of the inner hole of the copper bushing to control the cylindricity and roughness of the inner hole.

7. The assembly method of a triple-gear combination according to claim 1, characterized in that: The inspection and warehousing process involves inspecting the components, cleaning the oil seals, and then packaging and warehousing them.

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