JP2020101246A - Complex structure - Google Patents

Abstract

To provide a complex structure capable of securing the joint strength using a lattice structure.SOLUTION: The complex structure includes a metal frame 5 and a resin cover 6 joined to each other. The metal frame 5 is constructed in a lattice structure R, and the resin cover 6 is made to infiltrate into a cavity of the lattice structure R. On the metal frame 5, resin infiltration preventing walls 58 are provided for preventing the infiltration of molten resin into the lattice structure R. Namely, the metal frame 5 in the lattice structure R having a plurality of openings is constructed so that its surrounding is blocked at positions inside of the opening faces by the resin infiltration preventing walls 58. The resin cover 6 is constructed to infiltrate into the outside lattice structure R divided by the resin infiltration preventing walls 58 and to be joined thereto while blocking the openings of the metal frame 5.SELECTED DRAWING: Figure 2

Description

The present invention relates to a composite structure formed by joining a metal member and a resin member.

Conventionally, there is known a transmission case that meets the demand for weight reduction of a case by satisfying strength and rigidity, which are main required characteristics required for a case element even though it is a composite structure (for example, see Patent Document 1). .. In this transmission case, the side cover is a composite structure including a metal frame and a resin cover. The metal frame connects the entire circumference flange that is continuous over the entire circumference of the split opening, the first bearing support boss and the second bearing support boss that rotatably support the fixed sheave shaft, and connects the entire circumference flange and both bearing support bosses. And a reinforcing arm. The resin cover closes the opening formed by the metal frame.

JP2012-197918A

In the conventional transmission case, the metal frame and the resin cover are joined by the contact surface having a step, but there is a problem that the joint strength cannot be maintained unless the metal frame is provided with a groove or a hole. ..

The present invention has been made in view of the above problems, and an object of the present invention is to provide a composite structure that utilizes a lattice structure to secure the bonding strength.

To achieve the above object, in the present invention, in a composite structure in which a metal member and a resin member are joined, the metal member has a lattice structure, and the resin member penetrates into the voids of the lattice structure.

Therefore, it is possible to provide a composite structure that secures the bonding strength by utilizing the lattice structure.

1 is a partially cutaway view showing a belt type continuously variable transmission to which a transmission case having a composite structure of Example 1 is applied. It is an external view which shows the side cover by a composite structure. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2 showing a joint structure of the metal frame and the resin cover by the resin penetration protection wall of the first embodiment. FIG. 3 is a sectional view taken along line BB of FIG. 2 showing a joint structure of the metal frame and the resin cover through the resin penetration protection hole of the first embodiment. FIG. 5 is an explanatory diagram showing an insert molding method for a side cover using the composite structure of Example 1. FIG. 7 is a cross-sectional view showing a joint structure of a metal frame and a resin cover through a resin penetration preventing hole of the second embodiment.

Hereinafter, modes for carrying out the composite structure of the present invention will be described based on Examples 1 and 2 shown in the drawings.

The composite structure according to the first embodiment is applied to a transmission case of a belt type continuously variable transmission mounted on an engine vehicle, a hybrid vehicle, or the like. Hereinafter, the configuration of the first embodiment will be described by dividing it into "the overall configuration of the transmission case" and "the joining structure of the metal frame and the resin cover".

[Overall structure of transmission case]
FIG. 1 shows a belt type continuously variable transmission to which a transmission case TC having the composite structure of the first embodiment is applied. Hereinafter, the overall configuration of the transmission case TC will be described with reference to FIG.

As shown in FIG. 1, the transmission case TC is configured by flange-connecting the divided main transmission case 1, converter housing 2, and side cover 3 to each other. The transmission case TC incorporates a belt type continuously variable transmission mechanism 4 (transmission mechanism), and rotatably supports each shaft member of the belt type continuously variable transmission mechanism 4. The internal space of the transmission case TC is a wet space for the transmission hydraulic oil.

The belt type continuously variable transmission mechanism 4 has a continuously variable transmission function for continuously changing the gear ratio, which is the ratio of the input rotation speed of the transmission input shaft 40 and the output rotation speed of the transmission output shaft 41, by changing the belt contact diameter. Have. The belt type continuously variable transmission mechanism 4 includes a primary pulley 42, a secondary pulley 43, and a belt 44.

The primary pulley 42 includes a primary fixed sheave 42a and a primary movable sheave 42b. A fixed sheave shaft 42e is integrally formed with the primary fixed sheave 42a, and a hollow cylindrical movable sheave shaft 42f is disposed integrally with the primary movable sheave 42b in a coaxial arrangement with the fixed sheave shaft 42e. The movable sheave shaft 42f and the primary movable sheave 42b axially slide with respect to the fixed sheave shaft 42e by the primary pressure guided to the primary pressure chamber 45.

The secondary pulley 43 includes a secondary fixed sheave 43a and a secondary movable sheave 43b. A fixed sheave shaft 43e is formed integrally with the secondary fixed sheave 43a, and a hollow cylindrical movable sheave shaft 43f is formed integrally with the secondary movable sheave 43b in a coaxial arrangement with the fixed sheave shaft 43e. The movable sheave shaft 43f and the secondary movable sheave 43b slide in the axial direction with respect to the fixed sheave shaft 43e by the secondary pressure guided to the secondary pressure chamber 46.

The belt 44 is wound around a pair of V-shaped primary sheave surfaces 42c and 42d of the primary pulley 42 and a pair of V-shaped secondary sheave surfaces 43c and 43d of the secondary pulley 43. The belt 44 is composed of two sets of laminated rings in which a large number of annular rings are superposed from the inside to the outside, and a large number of elements provided in an annular shape that are connected to each other by sandwiching the two sets of laminated rings.

In the transmission case TC, of the main transmission case 1, the converter housing 2, and the side cover 3 which are flange-joined, the main transmission case 1 is an aluminum die-cast product, and the converter housing 2 and the side cover 3 are a composite structure.

The main transmission case 1 is made of, for example, an aluminum die-cast product using an aluminum alloy material (ADC12 or the like), and has circumferential flanges 11 and 12 having a plurality of bolt holes at both ends. The full circumference flange 11 is flange-connected to the converter housing 2, and the full circumference flange 12 is flange-connected to the side cover 3.

The converter housing 2 is a composite structure in which a metal frame 25 having a lattice structure made of an aluminum alloy material and a resin cover 26 made of a high-strength resin material having heat resistance and oil resistance are combined and joined. The converter housing 2 has a full-circumferential flange 21 having a plurality of bolt holes formed on the main transmission case 1 side, and the full-circumferential flange 21 is flange-connected to the full-circumferential flange 11 of the main transmission case 1.

Similar to the converter housing 2, the side cover 3 is a composite structure in which a metal frame 5 of a lattice structure R made of an aluminum alloy material and a resin cover 6 made of a high-strength resin material having heat resistance and oil resistance are combined and joined. I am trying. The side cover 3 has a full-circumferential flange 51 in which a plurality of bolt holes are opened on the main transmission case 1 side, and the full-circumferential flange 51 is flange-connected to the full-circumferential flange 12 of the main transmission case 1.

Here, the “lattice structure R” refers to a three-dimensional mesh structure having a complicated lattice-like void which is manufactured by additive manufacturing using a metal 3D printer and is impossible by manufacturing such as die casting.

[Joining structure of metal frame and resin cover]
FIG. 2 shows the side cover 3 of the composite structure, FIG. 3 shows the joint structure of the metal frame 5 and the resin cover 6 by the resin penetration protection wall 58 of the first embodiment, and FIG. 4 is the resin of the first embodiment. The joining structure of the metal frame 5 and the resin cover 6 by the intrusion prevention hole 59 is shown. Hereinafter, the joint structure of the metal frame 5 and the resin cover 6 will be described with reference to FIGS. 1 to 4.

The side cover 3 is a cover that covers the end of the belt type continuously variable transmission mechanism 4, and includes a metal frame 5 (metal member) of the lattice structure R and a plurality of openings formed by being surrounded by the metal frame 5. And a resin cover 6 (resin member) that is in close contact with and covers.

The metal frame 5 is a frame member that includes a full-circumferential flange 51, a first bearing support boss 52, a second bearing support boss 53, a vehicle body support boss 54, a component mounting boss 55, a reinforcing arm 56, and a hydraulic path. And an arm 57. The metal frame 5 is configured by integrally manufacturing these frame members with the lattice structure R.

The full-circumferential flange 51 is flange-connected to the full-circumferential flange 12 of the main transmission case 1, and as shown in FIGS. 1 and 2, a flange mating surface that is continuous over the entire circumference of the split opening with the main transmission case 1. 51a. In addition, as shown in FIG. 2, a plurality of bolt holes 51b are formed in the entire circumference flange 51.

The first bearing support boss 52 has a recess into which the first bearing 7 is fitted, and as shown in FIG. 1, the end of the fixed sheave shaft 42e of the primary pulley 42 is rotatable via the first bearing 7. To support.

The second bearing support boss 53 has a recess into which the second bearing 8 is fitted, and as shown in FIG. 1, the end of the fixed sheave shaft 43e of the secondary pulley 43 is rotatable via the second bearing 8. To support.

The vehicle body support boss 54 has a mount surface 54a for fixing the bracket of the mount member 10 by bolts, and as shown in FIG. 1, supports the side cover 3 with respect to the vehicle body 9 via the mount member 10. The vehicle body support boss 54 is formed integrally with the first bearing support boss 52.

As shown in FIG. 1, the component mounting boss 55 has a bolt seat surface 55a for fixing an external mounting component such as a bearing position regulating component with a bolt. The component mounting boss 55 is formed integrally with the second bearing support boss 53.

As shown in FIG. 1 and FIG. 2, the reinforcing arm 56 connects the entire circumference flange 51 and each boss (first bearing support boss 52, second bearing support boss 53, vehicle body support boss 54, component mounting boss 55) to each other. It is an arm member that connects in the radial direction, the circumferential direction, and the axial direction. The arm diameter and the arm layout of the reinforcing arm 56 are set after repeated calculations and experiments so that the required strength and rigidity are established.

As shown in FIG. 1, the hydraulic path arm 57 is an arm member that has a secondary lubricating pressure oil path 13 formed therein and also has a reinforcing function. The hydraulic path arm 57 is formed integrally with the second bearing support boss 53.

As shown in FIG. 2, the resin cover 6 is configured to cover each of the plurality of openings formed by being surrounded by the metal frame 5 having the lattice structure R. At this time, the resin cover 6 is joined to the inner surface of the opening of the metal frame 5 having the lattice structure R by infiltrating the resin into the lattice-shaped voids having the lattice structure R.

The joint structure of the metal frame 5 and the resin cover 6 is based on FIG. 3 in which the opening formed between the adjacent reinforcing arms 56, 56 (a part of the metal frame 5) is covered with the resin cover 6. explain.

The reinforcing arm 56 is constituted by the lattice structure R, and the periphery thereof is closed by a resin infiltration protection wall 58 that prevents the molten resin material from intruding into the lattice structure R. Here, in the inner surface of the side cover and the outer surface of the side cover where the resin cover 6 is not joined in the entire circumference of the reinforcing arm 56, the resin penetration protection wall 58 is set at the surface position. Then, in the opening surfaces on both sides of the entire circumference of the reinforcing arm 56 to which the resin cover 6 is joined, the resin penetration protection wall 58 is set at a position slightly inside the opening surface.

That is, the lattice structure R of the reinforcing arm 56 is divided into the resin infiltration prevention region D and the resin infiltration joint region J by the resin infiltration defense wall 58. Therefore, the resin cover 6 closes the opening formed by the metal frame 5, and the molten resin infiltrates and joins the lattice structure (=resin infiltration joining region J) on the outer side separated from the resin intrusion protection wall 58. To be done.

Next, when the resin cover 6 that covers the plurality of openings formed in the metal frame 5 is formed by insert molding, the configuration of the resin penetration protection hole 59 that secures the flow of the molten resin injected is shown in FIGS. 4 will be described. Here, the resin penetration protection hole 59 is a communication hole that prevents the molten resin from entering the inside of the lattice structure R while communicating with the opening.

At a position between the first injection gate 61 formed at the center position of the first bearing support boss 52 in the metal frame 5 and the opening around the first injection gate 61, as shown in FIG. Resin penetration preventing holes 59 are provided radially to communicate with the surrounding openings.

As shown in FIG. 2, the second injection gate 62 is formed in the metal frame 5 between the second injection gate 62 formed at the center of the second bearing support boss 53 and the opening around it. Resin penetration preventing holes 59 are provided radially to communicate with the surrounding openings.

As shown in FIG. 2, at the position of the reinforcing arm 56 where the openings are arranged adjacent to each other in the metal frame 5, a resin penetration protection hole 59 that communicates the adjacent openings is provided.

As shown in FIG. 4, the resin penetration protection hole 59 of the first embodiment closes the periphery of the hole with a resin penetration protection hole wall 58′ that is integral with the resin penetration protection wall 58 at a position on the outer diameter side of the hole inner surface. It is configured by leaving a part of the lattice structure R on the inner diameter side separated from the intrusion prevention hole wall 58'. That is, the lattice structure left on the inner diameter side by partitioning from the resin penetration protection hole wall 58 ′ serves as the resin penetration bonding area in the resin penetration protection hole 59.

The joint structure between the metal frame 25 of the converter housing 2 and the resin cover 26 is the same as the joint structure of the side cover 3, and thus the description thereof is omitted.

Next, "background technology and problem solving measures" will be described. Then, the "production operation of the composite structure by insert molding" in Example 1 will be described.

[Background technology and measures to solve problems]
Currently, there is a strong demand for weight reduction of vehicle transmissions mounted on vehicles. As a part of weight reduction of this vehicle transmission, material replacement such as replacing the oil pan with an oil pan made of synthetic resin has already been carried out.

However, the transmission case (main transmission case, converter housing, side cover), which is a box-shaped component, occupies a large proportion of the components of the vehicle transmission.

Therefore, it is conceivable to simply reduce the weight of the transmission case by replacing the metal material with a resin material. However, simply replacing the metal material with a resin material cannot satisfy the shaft supporting strength and rigidity, and the main required characteristics of strength (static, fatigue) and rigidity are not established. For this reason, as is clear from the fact that resin transmission cases have not been implemented until now, it has been impossible to make them resin by replacing the material of the transmission case.

On the other hand, a transmission case using a composite structure has been proposed that meets the requirements for weight reduction of the case by establishing strength and rigidity, which are the main required characteristics of the case element (for example, see Patent Document 1). .. In this transmission case, the side cover is a composite structure that includes a metal frame that achieves the required strength and rigidity and a resin cover that covers and covers the entire metal frame.

However, the proposed transmission case has a metal frame with a solid structure, and the resin cover is joined by engaging the outer peripheral edge of the resin cover with a protrusion formed along the outer peripheral flange of the metal frame. There is. On the other hand, the transmission case allows torsional deformation of the case when, for example, a torsional force is repeatedly applied from a shaft member supported by the case.

For this reason, when the metal frame and the resin cover are engaged by biting, the bonding strength exerted by the surface bonding effect of the metal-resin bonding surface having the step is achieved, and the bonding strength required for the transmission case is reduced. On the other hand, the bonding strength may be insufficient. For example, when a part of the joint surface is peeled off due to a shearing force acting on the joint surface due to the torsional deformation of the transmission case, the case rigidity and the case torsion strength are reduced. Further, if peeling progresses at the joint surface between the metal frame and the resin cover and a gap is created, oil leakage from the gap is allowed.

In this way, when aiming to reduce the weight of the case by using a composite structure consisting of a metal frame and a resin cover, the strength level that does not fall short of the required joint strength as the bonding strength between the metal frame and the resin cover. Remaining as a problem remains to be solved.

The present inventor has focused on the lattice structure R realized by the spread of metal 3D printers, with respect to the problems of the above composite structure. Then, in the composite structure in which the metal frame 5 and the resin cover 6 are joined, the metal frame 5 is constituted by the lattice structure R, and the resin cover 6 penetrates into the voids (lattice-like voids) of the lattice structure R. Adopted a configuration that allows.

That is, the molten resin infiltrates into the voids of the lattice structure R of the metal frame 5, and the molten resin cures in a state where the metal and the resin are intricately entangled. Therefore, the joint strength between the metal frame 5 and the resin cover 6 is secured by the anchor effect (also referred to as “anchor effect” or “fastener effect”), and is improved as compared with the joint strength exhibited by the surface joint effect.

Therefore, the lattice structure R can be utilized to provide a composite structure that secures the bonding strength. Further, by constructing the metal frame 5 with the lattice structure R, the weight of the metal frame 5 is reduced as compared with the case where it is an aluminum die-cast product having a solid structure, and as a result, the overall weight of the composite structure is also reduced. You can

[Manufacturing action of composite structure by insert molding]
FIG. 5 shows an insert molding method for the side cover 3 using the composite structure of Example 1. Hereinafter, the manufacturing operation of the composite structure by insert molding for producing a composite product in which the metal insert member (metal frame 5) and the resin member (resin cover 6) are integrated will be described with reference to FIGS. 3 to 5.

The insert molding method of the side cover 3 is one of resin molding methods of integrating metal and resin, and includes a manufacturing process of the metal frame 5, a mold loading process of the metal frame 5, a resin injection process, and a resin curing process. It has a process and a mold release process.

The manufacturing process of the metal frame 5 is a fixing process of manufacturing the metal frame 5 by additive manufacturing using a metal 3D printer. In the manufacturing process of the metal frame 5, the metal frame 5 is manufactured by the lattice structure R having innumerable lattice holes, the resin penetration protection wall 58, and the resin penetration protection hole wall 58'.

The metal frame 5 die loading step is a step of loading the opened resin molding die with the metal frame 5 manufactured using a metal 3D printer as a metal insert member. In the mold loading step of the metal frame 5, a mold release agent is applied in advance to the cavity surface of the resin molding mold so that the composite structure as a product can be easily separated from the resin molding mold.

In the resin injecting step, the resin molding die loaded with the metal frame 5 is closed, and the molten resin pressure injection gate of the resin molding die is communicated with the first injection gate 61 and the second injection gate 62. Then, as shown by the arrow in FIG. 5, the molten resin is injected under pressure from the resin injection port into the cavity space of the resin molding die through the first injection gate 61 and the second injection gate 62.

For example, when the molten resin is injected under pressure into the second injection gate 62, as shown by the arrow in FIG. 4, the molten resin flows into the cavity space formed by the resin molding die M via the resin penetration preventing hole 59. The molten resin is filled in the cavity space. At this time, as shown in FIG. 3, the molten resin enters the lattice-shaped voids of the lattice structure R (=resin infiltration joining region J) on the outer side, which is separated from the resin molding die M and the resin infiltration protection wall 58. To be joined. Further, in the resin penetration preventing hole 59, as shown in FIG. 4, the molten resin penetrates into the lattice-like voids of the lattice structure R left on the inner diameter side by being separated from the resin penetration preventing hole wall 58 ′ and joined. ..

The resin curing step is a step of curing (solidifying) the molten resin filled in the cavity space with the resin molding die M kept closed. By this resin curing step, the molten resin that has penetrated into the lattice-shaped voids of the lattice structure R of the metal frame 5 is cured in a state of being intricately entangled with the lattice structure R, and the bonding strength between the metal frame 5 and the resin cover 6 is increased. , Secured by the anchor effect.

In the mold release step, after the molten resin filling the cavity space is cured (solidified), the resin molding die M is opened, and the side cover 3 of the composite structure in which the metal frame 5 and the resin cover 6 are integrated is taken out. Is.

In this way, as a result of manufacturing the composite structure by insert molding, the metal frame 5 has a plurality of openings, and a lattice structure R whose periphery is closed by the resin penetration protection wall 58 at a position slightly inside the opening surface. To be done. Further, in the resin penetration protection hole 59, a lattice structure R is formed in which the periphery of the hole is closed by a resin penetration protection hole wall 58' at a position slightly inside the inner surface of the communication hole communicating with the opening. The resin cover 6 closes the opening formed by the metal frame 5 and penetrates into and joins the outer lattice structure R separated by the resin penetration protection wall 58 and the resin penetration protection hole wall 58'. ..

As described above, in the composite structure (converter housing 2, side cover 3) of the first embodiment, the effects listed below can be obtained.

(1) In a composite structure in which a metal member (metal frame 5) and a resin member (resin cover 6) are joined,
The metal member (metal frame 5) is composed of the lattice structure R,
The resin member (resin cover 6) is infiltrated into the void of the lattice structure R.
Therefore, it is possible to provide the composite structure (converter housing 2, side cover 3) that secures the bonding strength by utilizing the lattice structure R.

(2) The metal member (metal frame 5) is provided with a resin penetration protection wall 58 that prevents the molten resin from entering the interior of the lattice structure R.
Therefore, it is possible to prevent an extra weight increase due to the molten resin penetrating into the lattice structure R. That is, the resin penetration protection wall 58 protects the molten resin from entering, and does not allow the excess molten resin to enter the lattice structure R.

(3) The metal member is a metal frame 5 having a lattice structure R, which has a plurality of openings and whose periphery is closed by a resin penetration protection wall 58 at a position inside the opening surface,
The resin member is used as the resin cover 6 that closes the opening and also penetrates and is bonded to the lattice structure R on the outside separated from the resin intrusion protection wall 58.
Therefore, in the case of a composite structure including the metal frame 5 having a plurality of openings and the resin cover 6 that closes the openings, both the securing of the joint strength of the resin cover 6 and the weight reduction of the composite structure are achieved. be able to.

(4) The communication hole to the opening formed in the metal frame 5 is the resin penetration protection hole 59 that prevents the molten resin from entering the inside of the lattice structure R.
Therefore, it is possible to secure the bonding strength between the metal frame 5 and the resin cover 6 at the position of the communication hole to the opening formed in the metal frame 5.

(5) The resin permeation protection hole 59 is closed by a resin permeation protection hole wall 58' at a position on the outer diameter side from the inner surface of the hole, and the lattice structure R is formed on the inner diameter side separated from the resin permeation protection hole wall 58'. The configuration will be left partially.
Therefore, it is possible to prevent an extra weight increase due to the molten resin penetrating into the lattice structure R through the communication hole to the opening formed in the metal frame 5.

(6) The composite structure is a transmission case TC incorporating a speed change mechanism (belt type continuously variable speed change mechanism 4),
The transmission case TC rotatably supports the shaft members (the fixed sheave shaft 42e and the fixed sheave shaft 43e), and the internal space of the case is a wet space for the transmission fluid.
Therefore, it is possible to provide a transmission case TC having a composite structure that achieves required case strength, case rigidity, oil sealability, and weight reduction.

Example 2 is an example in which the resin penetration preventing hole has a hole lattice structure in which the voids are made wider than the voids of the internal lattice structure of the metal frame and communicate with each other.

FIG. 6 shows a joint structure of the metal frame 5 and the resin cover 6 through the resin penetration protection hole 59' of the second embodiment. Hereinafter, the joint structure of the metal frame 5 and the resin cover 6 will be described with reference to FIG.

As shown in FIG. 6, the resin penetration preventing hole 59 ′ of the second embodiment is configured by a hole lattice structure R′ having a larger space than the space of the internal lattice structure R of the metal frame 5 and communicating with each other. .. That is, by dividing the communication hole to the opening formed in the metal frame 5 by the internal lattice structure R and the hole lattice structure R′, the flow resistance of the molten resin is suppressed to be small and the hole lattice structure R facilitated to flow. 'Is the resin penetration joint area in the resin penetration protection hole 59'. Note that the other configurations are similar to those of the first embodiment, and therefore illustration and description thereof are omitted.

Next, the resin injection process in the second embodiment will be described. For example, when the molten resin is injected under pressure into the second injection gate 62, as shown by the arrow in FIG. 6, the molten resin is injected into the cavity space formed by the resin molding die M via the resin penetration protection hole 59′. It flows in and the molten resin is filled in the cavity space. At this time, by partitioning the resin penetration preventing hole 59' by the hole lattice structure R', the molten resin penetrates and is joined to the hole lattice structure R'by the wide lattice-like voids. The internal lattice structure R and the hole lattice structure R'have a large difference in flow resistance, so that the molten resin is prevented from entering the region of the internal lattice structure R. Since the other operations are the same as those in the first embodiment, the description thereof will be omitted.

As described above, in the composite structure (converter housing 2, side cover 3) of the second embodiment, in addition to the effects of (1) to (4) and (6) of the first embodiment, the following effects Play.

(7) The resin penetration preventing hole 59′ is configured by a hole lattice structure R′ in which the voids are wider than the voids of the internal lattice structure R of the metal frame 5 and communicate with each other.
Therefore, the bonding strength between the metal frame 5 and the resin cover 6 at the position of the resin penetration protection hole 59′ can be secured. In addition, the structure in which the hole portion lattice structure R′ is left without forming the communication hole in the metal frame 5 suppresses the deterioration in strength and rigidity of the metal frame 5 provided with the resin penetration protection hole 59′. You can

Although the composite structure of the present invention has been described above based on the first and second embodiments, the specific configuration is not limited to these embodiments, and is not limited to the claims. Design changes and additions are allowed without departing from the gist of the invention.

In the first and second embodiments, the metal member is the metal frame 5 having the lattice structure R, which has a plurality of openings and whose periphery is closed by the resin penetration protection wall 58 at a position inside the opening surface. Then, an example is shown in which the resin member is used as the resin cover 6 that covers the opening and also penetrates and is bonded to the outer lattice structure R partitioned by the resin penetration protection wall 58. However, the metal member may be a lattice structure formed by obtaining a solution by topology optimization, and the resin member may be a member that penetrates the entire lattice structure.

In the first and second embodiments, an example in which the composite structure of the present invention is applied to the converter housing 2 and the side cover 3 of the transmission case TC of the belt type continuously variable transmission in which the belt type continuously variable transmission mechanism 4 is incorporated is shown. It was However, the composite structure of the present invention may be applied to a transmission case for an automatic transmission having a stepped speed change mechanism incorporated therein, a transmission case for a manual transmission having a manual transmission mechanism incorporated therein, and the like. Further, not limited to the transmission case, it can be applied to various metal products such as a vehicle body frame structure, an in-vehicle unit case, a case of industrial equipment, a cover of industrial equipment, and the like, which are required to be lightweight. good.

TC transmission case 1 Main transmission case 2 Converter housing (composite structure)
3 Side cover (composite structure)
4 Belt type continuously variable transmission 42e Fixed sheave shaft (shaft member)
43e Fixed sheave shaft (shaft member)
5 Metal frame (metal member)
52 1st bearing support boss 53 2nd bearing support boss 56 Reinforcement arm 58 Resin infiltration defense wall 58' Resin infiltration defense hole wall 59, 59' Resin infiltration defense hole 6 Resin cover (resin member)
61 First injection gate 62 Second injection gate R lattice structure, internal lattice structure R'hole lattice structure

Claims (7)

In a composite structure in which a metal member and a resin member are joined,
The metal member is composed of a lattice structure,
A composite structure, wherein the resin member is allowed to penetrate into the voids of the lattice structure. The composite structure according to claim 1, wherein
A composite structure, characterized in that the metal member is provided with a resin infiltration protection wall for preventing molten resin from intruding into the interior of the lattice structure. The composite structure according to claim 2, wherein
The metal member is a metal frame having a lattice structure having a plurality of openings, the periphery of which is closed by the resin infiltration protection wall at a position inside the opening surface,
A composite structure, wherein the resin member serves as a resin cover that closes the opening portion and penetrates and is bonded to an outer lattice structure that is partitioned from the resin infiltration protection wall. The composite structure according to claim 3,
A composite structure characterized in that a communication hole to the opening formed in the metal frame is a resin penetration preventing hole for preventing a molten resin from entering the inside of the lattice structure. The composite structure according to claim 4, wherein
A configuration in which the resin penetration protection hole is closed at the position on the outer diameter side from the inner surface of the hole by a resin penetration protection hole wall, and a part of the lattice structure is left on the inner diameter side separated from the resin penetration protection hole wall. A composite structure characterized by: The composite structure according to claim 4, wherein
A composite structure characterized in that the resin penetration preventing hole is constituted by a hole lattice structure in which a void is made wider than the void of the internal lattice structure of the metal frame and communicated with each other. The composite structure according to any one of claims 1 to 6,
The composite structure is a transmission case containing a transmission mechanism,
The composite case, wherein the transmission case rotatably supports a shaft member, and an inner space of the case is a wet space with transmission hydraulic oil.