A lightweight flywheel housing made of iron converted to aluminum and its production process

Abstract

The present invention relates to the technical field of lightweight flywheel housings, and discloses an iron-to-aluminum lightweight flywheel housing and its production process, including a housing, heat dissipation holes, and a starting gear. One side of the housing is fixedly connected with a motor seat, a sensor hole position is opened on one side of the housing, and six groups of first bolt holes are fixedly connected to the surface of the housing. The present invention is provided with heat dissipation holes opened upward, which avoids the problem of the flywheel and the clutch getting water and rusting after the vehicle wades through water. At the same time, a filter screen is provided on the heat dissipation holes to prevent foreign objects from entering the inside of the flywheel housing. The present invention is provided with a limiting hole. After the motor is started, the rotating shaft is inserted into the limiting hole, which avoids the swing generated at the moment when the motor gear meshes with the starting gear during the start of the motor, and shatters the motor bearing. The flywheel disc provided by the present invention can independently install the flywheel and the clutch, so that when replacing the clutch, it is not necessary to disassemble the flywheel disc, reducing the repair process and repair man-hours.

Description

Technical Field

[0001] The present invention relates to the technical field of lightweight flywheel housings, and particularly to an iron-to-aluminum lightweight flywheel housing and its production process. Background Art

[0002] Flywheel housings are generally made of cast iron and are not easily deformed. It bears the mass of the transmission and serves as a fulcrum for power transmission. During use, due to the influence of factors such as gravity, external forces, and irregular vibrations, it inevitably suffers from cracking and damage. The common cracking parts of the flywheel housing mostly occur in the upper part, that is, starting from the upper stud hole of the left starter bearing hole to the right timing inspection hole, and showing a curved crack; some also appear in the plane weak parts, such as the contact surface between the cylinder block and the transmission housing.

[0003] In the existing flywheel housing design, the flywheel disc and the clutch assembly are fixed together. When replacing the clutch, it is necessary to remove the flywheel disc together and then perform combined installation. Therefore, it is relatively wasteful of maintenance man-hours. Moreover, most of the heat dissipation holes of the traditional flywheel housing are arranged at the lower end, so that after the vehicle wades through water, it will cause the flywheel disc and the clutch to get water and rust. Summary of the Invention

[0004] The purpose of the present invention is to provide an iron-to-aluminum lightweight flywheel housing and its production process, which solves the problems in the existing flywheel housing design that the flywheel disc and the clutch assembly are fixed together. When replacing the clutch, it is necessary to remove the flywheel disc together and then perform combined installation. Therefore, it is relatively wasteful of maintenance man-hours. Moreover, most of the heat dissipation holes of the traditional flywheel housing are arranged at the lower end, so that after the vehicle wades through water, it will cause the flywheel disc and the clutch to get water and rust.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme: An iron-to-aluminum lightweight flywheel housing, including a housing, heat dissipation holes, and a starting gear. One side of the housing is fixedly connected with a motor seat. A sensor hole position is opened on one side of the housing. Six groups of first bolt holes are fixedly connected to the surface of the housing. Eight groups of second bolt holes are opened at the edges of the inner and outer walls of the housing. A number of groups of reinforcing ribs are opened on the inner surface of the housing. A shaft hole is opened in the middle of the housing. Heat dissipation holes are opened at the upper end of the housing. Sealing grooves are opened at the edges of the inner and outer walls of the housing. A limiting hole is opened in the middle of the inner end face of the motor seat. A rotating shaft is rotatably connected in the shaft hole. One end of the rotating shaft is fixedly connected with a starting gear.

[0006] As a further scheme of the present invention: A channel is opened on the outer wall of the housing, and the housing is communicated with the motor seat through the channel.

[0007] As a further scheme of the present invention: A filter screen is fixedly connected to the heat dissipation holes, and the filter screen is fixedly connected to the heat dissipation holes through buckles.

[0008] As a further solution of the present invention: an inner hole is provided in the middle of the starting gear, an inner hole is provided in the middle of the rotating shaft, and the inner hole radius of the starting gear is the same as that of the inner hole of the rotating shaft.

[0009] As a further solution of the present invention: a first spline is provided on the inner wall of the rotating shaft, a second spline is provided on the outer wall of one end of the rotating shaft, and the first spline penetrates through both end faces of the rotating shaft.

[0010] As a further solution of the present invention: the rotating shaft and the shaft hole are connected by a rolling bearing.

[0011] As a further solution of the present invention: a clamping groove is provided in the middle of the rotating shaft, and a snap ring is connected in cooperation with the outside of the clamping groove.

[0012] As a further solution of the present invention: the limiting hole extends to the inner end face of the motor seat, and the limiting hole does not penetrate the inner wall end face of the motor seat.

[0013] As a further solution of the present invention: the sealing groove is a double-ring groove, and reinforcing ribs are provided on both sides of the inner surface of the housing.

[0014] The present invention also provides a production process for a lightweight flywheel housing made of iron converted to aluminum, and the specific steps are as follows:

[0015] Step 1: First, manufacture a corresponding mold according to the flywheel housing to be produced. After plasticizing the casting clay with the mold, pour the smelted aluminum into the mold. After the aluminum solidifies, remove the mold and clean the casting clay to obtain a blank of the housing, so that the housing, shaft hole, motor seat, reinforcing ribs, first bolt hole, sealing groove, sensor hole, heat dissipation hole and channel are initially formed. Grind the burrs left after casting with a grinding machine to be smooth.

[0016] Step 2: Clamp the polished housing on a special fixture, and use a bench drill to drill holes according to the requirements of the process soil quality, and complete the processing of the motor seat mounting holes and the second bolt holes respectively. Then use a milling cutter to process and polish the limiting hole, and then use the milling cutter to process and polish the sensor hole. After that, process and polish the shaft hole, and then place the housing on a lathe to process and polish the sealing groove.

[0017] Step 3: Insert the rotating shaft into the shaft hole, then snap the snap ring into the clamping groove, apply grease. During installation, insert the spline of the engine crankshaft into the first spline, fix the housing on the engine through the first bolt hole 4, insert the clutch into the second spline through the spline, cover the clutch housing on the end face of the housing, and then fix the whole on the engine through the second bolt hole.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The present invention is provided with heat dissipation holes opened upward, which avoids the problem that the flywheel and the clutch get water and rust after the vehicle wades through water. At the same time, a filter screen is arranged on the heat dissipation holes to prevent foreign objects from entering the inside of the flywheel housing.

[0020] 2. The present invention is provided with a limiting hole. After the motor is started, the rotating shaft is inserted into the limiting hole, which avoids the swing generated when the motor gear meshes with the starting gear at the moment of starting the motor and shatters the motor bearing.

[0021] 3. The flywheel disc provided by the present invention can independently install the flywheel and the clutch, so that when replacing the clutch, it is not necessary to disassemble the flywheel disc, reducing the repair process and repair man-hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a lightweight flywheel housing for iron-to-aluminum conversion and its production process;

[0023] Figure 2 It is a schematic reverse structural diagram of a lightweight flywheel housing for iron-to-aluminum conversion and its production process;

[0024] Figure 3 It is a schematic detailed structural diagram of a lightweight flywheel housing for iron-to-aluminum conversion and its production process;

[0025] Figure 4 It is a schematic detailed structural diagram of a lightweight flywheel housing for iron-to-aluminum conversion and its production process;

[0026] Figure 5 It is a schematic structural diagram of the starting gear of a lightweight flywheel housing for iron-to-aluminum conversion and its production process;

[0027] Figure 6 It is a schematic structural diagram of the clamping groove and snap ring of a lightweight flywheel housing for iron-to-aluminum conversion and its production process.

[0028] In the figure: 1. Housing; 2. Motor seat; 3. Sensor hole; 4. First bolt hole; 5. Second bolt hole; 6. Reinforcing rib; 7. Shaft hole; 8. Heat dissipation hole; 9. Filter screen; 10. Sealing groove; 11. Limiting hole; 12. Rotating shaft; 13. Starting gear; 14. First spline; 15. Second spline; 16. Clamping groove; 17. Snap ring; 18. Channel. DETAILED DESCRIPTION OF THE INVENTION

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment: Refer to Figure 1-6 , in the embodiment of the present invention, a lightweight flywheel housing for iron-to-aluminum conversion includes a housing 1, heat dissipation holes 8, and a starting gear 13. One side of the housing 1 is fixedly connected to a motor seat 2. A sensor hole position 3 is provided on one side of the housing 1. Six groups of first bolt holes 4 are fixedly connected to the surface of the housing 1. Eight groups of second bolt holes 5 are provided at the edges of the inner and outer walls of the housing 1. A number of groups of reinforcing ribs 6 are provided on the inner surface of the housing 1. A shaft hole 7 is provided in the middle of the housing 1. Heat dissipation holes 8 are provided at the upper end of the housing 1. Sealing grooves 10 are provided at the edges of the inner and outer walls of the housing 1. A limit hole 11 is provided in the middle of the inner end face of the motor seat 2. A rotating shaft 12 is rotatably connected in the shaft hole 7. One end of the rotating shaft 12 is fixedly connected to a starting gear 13.

[0031] As a further solution of the present invention: A channel 18 is provided on the outer wall of the housing 1. The housing 1 and the motor seat 2 are connected and communicated through the channel 18. A channel 18 is provided on the outer wall of the housing 1. The housing 1 and the motor seat 2 are connected and communicated through the channel 18.

[0032] As a further solution of the present invention: An inner hole is provided in the middle of the starting gear 13. An inner hole is provided in the middle of the rotating shaft 12. The radius of the inner hole of the starting gear 13 is the same as that of the inner hole of the rotating shaft 12. A first spline 14 is provided on the inner wall of the rotating shaft 12. A second spline 15 is provided on the outer wall of one end of the rotating shaft 12. The first spline 14 penetrates through both end faces of the rotating shaft 12.

[0033] As a further solution of the present invention: The rotating shaft 12 and the shaft hole 7 are connected by a rolling bearing. A clamping groove 16 is provided in the middle of the rotating shaft 12. A snap ring 17 is externally fitted to the clamping groove 16. The limit hole 11 extends into the inner end face of the motor seat 2. The limit hole 11 does not penetrate the inner wall end face of the motor seat 2. The sealing groove 10 is an annular double groove. Reinforcing ribs 6 are provided on both sides of the inner surface of the housing 1.

[0034] A production process for a lightweight flywheel housing for iron-to-aluminum conversion is as follows:

[0035] Step 1: First, manufacture a corresponding mold according to the flywheel housing to be produced. After plasticizing the casting soil with the mold, pour the smelted aluminum liquid into the mold. After the aluminum liquid solidifies, remove the mold, clean the casting soil, and obtain a blank of the housing 1, enabling the preliminary formation of the housing 1, shaft hole 7, motor seat 2, reinforcing rib 6, first bolt hole 4, sealing groove 10, sensor hole 3, heat dissipation hole 8, and channel 18. Smooth the burrs left after casting using a grinding machine.

[0036] Step 2: Clamp the polished housing 1 on a special fixture, and use a bench drill to drill holes according to the requirements of the process soil quality, respectively machining the mounting holes of the motor seat 2 and the second bolt hole 5. Then use a milling cutter to machine and polish the limiting hole 11, and then use the milling cutter to machine and polish the sensor hole 3. After that, machine and polish the shaft hole 7, and then place the housing 1 on a lathe to machine and polish the sealing groove 10.

[0037] Step 3: Insert the rotating shaft 12 into the shaft hole 7, then clamp the snap ring 17 in the clamping groove 16, apply grease. During installation, insert the spline of the engine crankshaft into the first spline 14, fix the housing 1 on the engine through the first bolt hole 4, insert the clutch onto the second spline 15 through the spline, cover the clutch housing on the end face of the housing 1, and then fix and connect the whole to the engine through the second bolt hole 5.

[0038] Production principle: Manufacture a corresponding mold according to the flywheel housing to be produced. After plasticizing the casting soil with the mold, pour the smelted aluminum liquid into the mold. After the aluminum liquid solidifies, remove the mold, clean the casting soil, and obtain a blank of the housing 1, enabling the preliminary formation of the housing 1, shaft hole 7, motor seat 2, reinforcing rib 6, first bolt hole 4, sealing groove 10, sensor hole 3, heat dissipation hole 8, and channel 18. Smooth the burrs left after casting using a grinding machine. Clamp the polished housing 1 on a special fixture, and use a bench drill to drill holes according to the requirements of the process soil quality, respectively machining the mounting holes of the motor seat 2 and the second bolt hole 5. Then use a milling cutter to machine and polish the limiting hole 11, and then use the milling cutter to machine and polish the sensor hole 3. After that, machine and polish the shaft hole 7, and then place the housing 1 on a lathe to machine and polish the sealing groove 10. Insert the rotating shaft 12 into the shaft hole 7, then clamp the snap ring 17 in the clamping groove 16, apply grease. During installation, insert the spline of the engine crankshaft into the first spline 14, fix the housing 1 on the engine through the first bolt hole 4, insert the clutch onto the second spline 15 through the spline, cover the clutch housing on the end face of the housing 1, and then fix and connect the whole to the engine through the second bolt hole 5.

[0039] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightweight flywheel housing made of iron converted to aluminum, comprising a housing (1), heat dissipation holes (8) and a starting gear (13). Characterized in that, One side of the housing (1) is fixedly connected with a motor seat (2), a sensor hole position (3) is opened on one side of the housing (1), six groups of first bolt holes (4) are fixedly connected to the surface of the housing (1), eight groups of second bolt holes (5) are opened at the edges of the inner and outer walls of the housing (1), several groups of reinforcing ribs (6) are opened on the inner surface of the housing (1), a shaft hole (7) is opened in the middle of the housing (1), heat dissipation holes (8) are opened at the upper end of the housing (1), sealing grooves (10) are opened at the edges of the inner and outer walls of the housing (1), a limiting hole (11) is opened in the middle of the inner end surface of the motor seat (2), a rotating shaft (12) is rotatably connected in the shaft hole (7), and a starting gear (13) is fixedly connected to one end of the rotating shaft (12); a filter screen is fixedly connected to the heat dissipation hole, and the filter screen and the heat dissipation hole are fixedly connected by a buckle; a first spline (14) is opened on the inner wall of the rotating shaft (12), a second spline (15) is opened on the outer wall of one end of the rotating shaft (12), and the first spline (14) penetrates through both end faces of the rotating shaft (12); the rotating shaft (12) and the shaft hole (7) are connected by a rolling bearing; a clamping groove (16) is opened in the middle of the rotating shaft (12), and a snap ring (17) is externally fitted to the clamping groove (16).

2. The lightweight flywheel housing made of iron converted to aluminum according to claim 1, Characterized in that , a channel (18) is opened on the outer wall of the housing (1), and the housing (1) and the motor seat (2) are communicated through the channel (18).

3. The lightweight flywheel housing made of iron converted to aluminum according to claim 1, Characterized in that, An inner hole is provided in the middle of the starting gear (13), an inner hole is provided in the middle of the rotating shaft (12), and the inner hole radius of the starting gear (13) is the same as that of the inner hole of the rotating shaft (12).

4. The lightweight flywheel housing made of iron converted to aluminum according to claim 1, Characterized in that, The limiting hole (11) extends into the inner end surface of the motor seat (2), and the limiting hole (11) does not penetrate the inner wall end surface of the motor seat (2).

5. The lightweight flywheel housing made of iron converted to aluminum according to claim 1, Characterized in that, The sealing groove (10) is an annular double groove, and reinforcing ribs (6) are opened on both sides of the inner surface of the housing (1).

6. A production process of the lightweight flywheel housing made of iron converted to aluminum according to any one of claims 1-5, Characterized in that, The specific steps are as follows: Step 1: First, manufacture a corresponding mold according to the flywheel housing to be produced. After plasticizing the casting soil with the mold, pour the smelted aluminum liquid into the mold. After the aluminum liquid solidifies, remove the mold and clean the casting soil to obtain a blank of the housing (1), so that the housing (1), shaft hole (7), motor seat (2), reinforcing rib (6), first bolt hole (4), sealing groove (10), sensor hole (3), heat dissipation hole (8) and channel (18) are initially formed. Grind the burrs left after casting smooth with a grinding machine. Step 2: Clamp the polished housing (1) on a special fixture and drill holes with a bench drill according to the process requirements to complete the machining of the mounting holes for the motor seat (2) and the second bolt holes (5). Then use a milling cutter to machine and grind the limit holes (11), and then use the milling cutter to machine and grind the sensor holes (3). After that, machine and grind the shaft holes (7). Then place the housing (1) on a lathe to machine and grind the sealing groove (10). Step 3: Insert the rotating shaft (12) into the shaft hole (7), then clamp the snap ring (17) in the snap ring groove (16), apply grease. During installation, insert the spline of the engine crankshaft into the first spline (14), fix the housing (1) on the engine through the first bolt hole 4, insert the clutch onto the second spline (15) through the spline, cover the clutch housing on the end face of the housing (1), and then fix and connect the whole to the engine through the second bolt holes (5).

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