JP2020138249A - Pressure-insertion method, pressure-insertion device and pressure-insertion jig - Google Patents

Abstract

To suppress plastic deformation or the like caused by a stress concentration with respect to a local part of an arm link when pressure-inserting a second control shaft into the arm link.SOLUTION: An arm link 13 arranged on upper faces of first and second plate members 78, 79 of a guide mechanism 72 is inserted into a second accommodation chamber 28b of a housing main body 28 together with the plate members, and lower faces of the plate members are abutment-supported by six pieces of support pins 76a to 76f of a support mechanism 71 via four jig insertion holes 66a to 66d which are formed at the housing main body. After that, a pressure-insertion shaft part 23b of a second control shaft 11 is pressure-inserted into a pressure-insertion hole 13c of the arm link from an axial direction for fixation, and a pressure-insertion load at the pressure-insertion is directly received by the plate members via the support pins.SELECTED DRAWING: Figure 8

Description

The present invention relates to a press-fitting method, a press-fitting device, and a press-fitting jig.

For example, in the actuator of the link mechanism for an internal combustion engine described in Patent Document 1 below, first and second openings are formed on adjacent different surfaces of a housing made of a single member, respectively. An arm link, which is a press-fitting member, is inserted into the first opening, while a control shaft, which is a shaft member, is inserted into the second opening, and is inserted into a press-fitting hole in the arm link in the housing. The control shaft is press-fitted and fixed.

Then, when the control shaft is press-fitted and fixed to the arm link, three support pins are inserted into the three jig insertion holes formed in the housing. After that, the control shaft is press-fitted into the press-fitting hole of the arm link in a state where one side surface of the arm link opposite to the press-fitting direction of the control shaft is abutted and supported by each tip surface of each support pin. As a result, the press-fitting load applied to the arm link when the control shaft is press-fitted into the press-fitting hole is received by each of the support pins.

Japanese Patent No. 6232501 (FIGS. 9, 10, 12)

However, in the prior art described in the above-mentioned publication, when the control shaft is press-fitted and fixed to the press-fitting hole, the press-fitting load from the three support pins is directly received at three points on one side surface of the arm link. It has become. Therefore, a local concentrated stress acts on one side surface of the arm link, and the arm link may be plastically deformed.

One of the objects of the present invention is to provide a press-fitting method, a press-fitting device, and a press-fitting jig capable of suppressing plastic deformation due to concentrated stress on a local part of the press-fitted member when connecting two members by press-fitting. It is in.

In the present invention, preferably, a plurality of support jigs are inserted into the jig insertion holes of the housing, and the first member arranged on the plate member is inserted into the first opening of the housing to insert the plate member. Is placed on each support jig. After that, the second member is press-fitted and fixed to the press-fitting fixing portion of the first member while inserting the second member into the second opening. Next, the plate member is taken out from the first opening, and the support jig is retracted from the jig insertion hole.

According to the present invention, when the two members are press-fitted and fixed in the housing, it is possible to avoid the generation of concentrated stress on the local part of the first member and suppress the plastic deformation of the first member.

It is the schematic which described typically the variable compression ratio mechanism to which the embodiment of this invention is applied. It is a top view of the actuator of the variable compression ratio mechanism applied to the embodiment of this invention. It is a perspective view which shows disassembled the actuator provided in this embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. The arm link provided in this embodiment is shown, where A is a front view of the arm link and B is a side view. It is an enlarged plan view which shows the slider plate and a pair of plate members provided in this embodiment. FIG. 5 is an enlarged plan view showing a state in which the arm link is positioned and held by each plate member provided in the present embodiment. It is a schematic diagram which shows the state which press-fits the 2nd control shaft with the arm link being supported by the support mechanism through two plate members. 9 to 11 are side views showing a press-fitting process of the second control shaft, and FIG. 9 is a schematic view showing a state in which the housing body is lowered and each support pin is inserted into each jig insertion hole. After inserting each support pin into each jig insertion hole, the arm link and the second control link are inserted and arranged in the housing body via the guide mechanism, and the second control shaft is to be press-fitted into the arm link. It is a schematic diagram. It is the schematic which shows the state which the 2nd control shaft is press-fitted into the press-fitting hole of an arm link, and the guide mechanism is moved backward. Similarly, FIGS. 12 to 15 are plan views showing a press-fitting process of the second control shaft, and FIG. 12 is a schematic view of a state in which each jig insertion hole of the housing body is inserted into each support pin of the support mechanism. It is the schematic which shows the state which the arm link is inserted into the housing body by the guide mechanism. It is a schematic diagram which shows the state which moved backward the guide mechanism after press-fitting the 2nd control shaft into an arm link. It is the schematic which shows the state which the guide mechanism was further moved backward.

Hereinafter, a press-fitting method, a press-fitting device, and an embodiment of a press-fitting jig according to the present invention will be described with reference to the drawings. In this embodiment, it is applied to an actuator of a variable compression ratio mechanism (VCR) that changes the mechanical compression ratio of a gasoline-powered in-line 4-cylinder internal combustion engine.

FIG. 1 is a schematic view schematically showing a variable compression ratio mechanism to which the present invention is applied, FIG. 2 is a plan view showing an actuator of the variable compression ratio mechanism of the embodiment, and FIG. 3 is an actuator used in the present embodiment. Is an exploded perspective view, FIG. 4 is a sectional view taken along line AA of FIG.

The variable compression ratio mechanism shown in FIG. 1 is basically the same as that described in Japanese Patent No. 6232501 described as the prior art, and thus will be briefly described.

The upper link 3 whose upper end is rotatably connected to the piston pin 2 of the piston 1 which reciprocates in the cylinder of the cylinder block of the internal combustion engine, and the lower link 5 which is rotatably connected to the crank pin 4a of the crankshaft 4. , Is equipped. In the lower link 5, the lower end of the upper link 3 is rotatably connected via the connecting pin 6, and the upper end of the first control link 7 is rotatably connected via the connecting pin 8.

The lower end of the first control link 7 is connected to a connecting mechanism 9 composed of a plurality of link members. The connecting mechanism 9 includes a first control shaft 10, a second control shaft 11 which is a first member, and a second control link 12 (a part of the first member) that connects both of the first control shafts 10 and 11. ..

The first control shaft 10 extends in the cylinder row direction inside the engine in parallel with the crankshaft 4, and has a first journal portion 10a rotatably supported by the engine body and a lower end of the first control link 7 of each cylinder. It includes a plurality of control eccentric shaft portions 10b to which the portions are rotatably attached, and an eccentric shaft portion 10c to which one end portion 12a of the second control link 12 is rotatably attached.

The control eccentric shaft portion 10b is provided at a position eccentric by a predetermined amount with respect to the first journal portion 10a via the first arm portion 10d. Similarly, the eccentric shaft portion 10c is provided at a position eccentric by a predetermined amount with respect to the first journal portion 10a via the second arm portion 10e.

The second control shaft 11 is rotatably supported in the housing 20 described later via a plurality of journal portions. Further, the second control shaft 11 is connected and fixed to an arm link 13 (another part of the first member) rotatably attached to the other end 12b of the second control link 12.

As shown in FIGS. 2 and 3, the second control link 12 is formed in a lever shape in which one end 12a side is thinner than the other end 12b side. In the second control link 12, one end 12a connected to the eccentric shaft portion 10c is formed in a substantially linear shape, while the other end 12b is bent in a substantially curved shape. An insertion hole 12c through which the eccentric shaft portion 10c is rotatably inserted is formed at the tip end portion of the one end portion 12a. The other end 12b is held in a state where the tip 12d is sandwiched between the bifurcated portions 13b and 13b of the arm link 13, which will be described later. Also. The other end 12b is rotatably connected to the arm link 13 via a connecting pin 14 inserted into the pin hole 12e provided in the tip 12d.

FIG. 5 shows an arm link used in the present embodiment, where A is a side view and B is a front view.

As shown in FIGS. 3 and 5A and 5B, the arm link 13 is formed separately from the second control shaft 11, and is formed of, for example, an iron-based metal material in a Daruma shape having a large and small diameter when viewed from the side surface. .. Further, the arm link 13 has a solid portion 13a on the large diameter side (shaded portion in FIG. 5B) and a pair of bifurcated portions 13b and 13b continuously formed on the large diameter side and the small diameter side. ing.

The solid portion 13a has higher rigidity than the bifurcated portions 13b and 13b. Then, in the substantially center of the solid portion 13a, a press-fitting hole 13c, which is a press-fitting fixing portion into which the press-fitting shaft portion formed between the journal portions before and after the second control shaft 11 is press-fitted, is formed through. ing.

The width of the space between the bifurcated portions 13b and 13b is set so that the other end portion 12b of the second control link 12 can be inserted. Further, in the bifurcated portions 13b and 13b, two connecting holes 13d and 13d to which the connecting pin 14 is press-fitted and fixed are coaxially formed. The axis (connecting pin 14) of the connecting holes 13d and 13d is eccentric in the radial direction from the axis of the second control shaft 11 via the press-fitting hole 13c.

The rotational position of the second control shaft 11 is changed by the rotational force transmitted from the drive motor 22 via the speed reducer 21 which is a part of the actuator. As a result, the first control shaft 10 rotates via the second control link 12, and the position of the lower end portion of the first control link 7 moves. As a result, the engine compression ratio changes according to the change in the stroke characteristics of the piston 1 due to the change in the posture of the lower link 5.

As shown in FIGS. 2 to 4, the actuators include a second control shaft 11, a housing 20 that rotatably supports the second control shaft 11 inside, and a speed reducer provided inside the rear end side of the housing 20. It is mainly composed of 21 and a drive motor 22 attached to the rear end side of the speed reducer 21. Since these structures are the same as the above-mentioned conventional techniques, they will be briefly described.

The second control shaft 11 has a shaft portion main body 23 and a fixing flange 24 integrally provided at the rear end portion of the shaft portion main body 23. The shaft portion main body 23 is formed in a stepped diameter in the axial direction, and is press-fitted into the small diameter first journal portion 23a on the tip portion side and the press-fitting hole 13c of the arm link 13 from the first journal portion 23a side. It has a medium-diameter press-fitting shaft portion 23b on the side and a large-diameter second journal portion 23c on the fixing flange 24 side. A first step edge 23d is formed between the press-fit shaft portion 23b and the second journal portion 23c, and a second step edge 23e is formed between the first journal portion 23a and the press-fit shaft portion 23b. Has been done.

When the press-fit shaft portion 23b is press-fitted into the press-fit hole 13c of the arm link 13 from the first journal portion 23a side, the first step edge 23d abuts on one side hole edge of the press-fit hole 13c from the axial direction. On the other hand, when the shaft portion main body 23 is inserted into the support hole 30, the second step edge 23e comes into contact with the step hole edge 30c described later in the support hole 30. As a result, the shaft portion main body 23 is restricted from moving further in the axial direction.

The fixing flange 24 has a plurality of (six in this embodiment) bolt insertion holes 24a formed at equidistant positions in the circumferential direction of the outer peripheral portion, and each of the bolt insertion holes 24a is inserted into the fixing flange 246. The bolt 25 of the book is coupled to the first circular spline 27 of the speed reducer 21 via the thrust plate 26.

Further, the fixing flange 24 has an annular first bearing support portion 24b projecting from the inner peripheral portion thereof. The first bearing support portion 24b has a first support groove 24c formed on the inner peripheral side.

The housing 20 closes one end of the housing main body 28, which is formed entirely in a cubic shape by an aluminum alloy material, and the first accommodation chamber 28a, which is a second opening inside the rear end side of the housing main body 28. It is composed of a cover 29 and.

The first accommodation chamber 28a is formed in a large-diameter annular groove shape substantially in the center of the rear end surface 28e, which is the second surface of the housing body 28 on the speed reducer 21 side.

The housing body 28 is provided with a second accommodation chamber 28b (first opening) formed along the lateral direction at a position internally front of the first accommodation chamber 28a (a part of the second opening). .. A support hole 30 forming another part of the second opening through which the shaft portion main body 23 of the second control shaft 11 is inserted is formed from the bottom surface of the first accommodation chamber 28a in the internal axial direction. The support hole 30 extends from the bottom surface of the first accommodation chamber 28a in a direction orthogonal to the second accommodation chamber 28b and penetrates the inside of the housing main body 28.

An annular groove 28d concentric with the axis of the support hole 30 is formed at a substantially central position of the flat front end surface 28c of the housing body 28.

Further, an angle sensor 32 for detecting the rotation angle position of the second control shaft 11 is housed and arranged in the holding hole 31 extending in the axial direction from the tip of the support hole 30.

The cover 29 is made of an aluminum alloy material like the housing main body 28, and the motor shaft insertion hole 29a is formed through the center.
The outer peripheral surface of the cover 29 is fixed to the housing body 28 by four bolts 43 inserted through the four boss portions 29b protruding in the radial direction.

Further, the cover 29 has an annular second bearing support portion 29c projecting from the inner peripheral portion of the inner end surface on the first accommodation chamber 28a side. Further, the outer peripheral portion of the inner end surface has six female screw holes into which bolts 41 for connecting the second circular spline 38, which will be described later, are screwed. A motor casing 45 is connected to the rear end of the cover 29 by a plurality of bolts 49.

The second accommodating chamber 28b accommodates and arranges the connecting portion between the other end 12b of the second control link 12 and the arm link 13 by the connecting pin 14. Therefore, the second accommodation chamber 28b is a space for ensuring the free swing of the second control link 12 and the arm link 13. Further, the width and length are formed to be slightly larger than the width of the other end 12b of the second control link 12 to suppress backlash during operation.

The outer diameter of the inner peripheral surface of the support hole 30 is formed in a stepped diameter shape in accordance with the outer diameter of the shaft portion main body 23 of the second control shaft 11, and the first journal portion 23a is bearing the first small diameter first. It is composed of a bearing hole 30a, a portion opened in the second accommodation chamber 28b, and a large-diameter second bearing hole 30b on which the second journal portion 23c is supported.

When the shaft body 23 is inserted into the support hole 30, the stepped hole edge 30c facing the second accommodating chamber 28b of the first bearing hole 30a comes into contact with the second stepped edge 23e from the axial direction and is inserted further. It is becoming regulated.

As shown in FIGS. 2 and 3, the angle sensor 32 includes a cap-shaped sensor cover 32a press-fitted and fixed to the inner peripheral surface of the holding hole 31, and an angle detection device arranged on the inner peripheral side of the sensor cover 32a. The rotor 32b and the sensor unit 32c provided in the center of the sensor cover 32a to detect the rotational position of the rotor 32b are mainly composed of the rotor 32b. The sensor unit 32c is adapted to output the detected signal to a control unit (not shown) that detects the engine operating state. In the rotor 32b, the tip protrusion 32d is press-fitted and fixed in the fixing hole on the tip side of the shaft body 23.

The sensor cover 32a is attached to the front end surface 28c of the housing body 28 together with the sensor portion 32c by two bolts 34.

Further, inside the housing body 28, as shown in FIG. 4 and FIG. 9 showing a press-fitting step described later, along the opening direction of the support hole 30, that is, along the axial direction of the support hole 30 from the front end surface 28c. A plurality of linear jig insertion holes 66a, 66b, 66c, 66d (four in this embodiment) are formed through. Each of the jig insertion holes 66a to 66d is set to have the same and uniform diameter, and the cross-sectional shape is formed into a circular shape. Of the four jig insertion holes, three jig insertion holes 66a to 66c are provided at axially symmetrical positions centered on the axial center of the support hole 30. That is, the jig insertion holes 66a to 66c are formed at positions straddling the outer peripheral edge of the circular groove 28d from the radial direction and at equidistant positions in the circumferential direction. Further, the other jig insertion hole 66d is formed at a position radially outward from the one jig insertion hole 66c.

Although each of the tip portions shows only two jig insertion holes 66a and 66c in FIG. 4, each of them opens into the second storage chamber 28b.

As will be described later, these four jig insertion holes 66a to 66d are a plurality (6 in this embodiment) when the press-fitting shaft portion 23b of the second control shaft 11 is press-fitted into the press-fitting hole 13c of the arm link 13. ), Four of the support pins, which are the support jigs, are inserted.

As shown in FIGS. 3 and 4, the speed reducer 21 is a strain wave gear type, and each component is housed in a first storage chamber 28a of a housing body 28 closed by a cover 29. That is, an annular first circular spline 27 which is bolted to the fixing flange 24 and has a plurality of internal teeth 27a formed on the inner circumference and is arranged inside the first circular spline 27 on the outer peripheral surface. A wave motion in which a flex spline 36, which is an external gear having a plurality of external teeth 36a meshing with each internal tooth 27a, and an elliptical outer peripheral surface slide along a part of the inner peripheral surface of the flex spline 36. A second wave generator 37, which is a generator, and an internal tooth 38a arranged on one side of the first circular spline 27 in the axial direction and meshing with each external tooth 36a of the flex spline 36 are formed on the inner peripheral surface. It is mainly composed of a circular spline 38 and.

The flex spline 36 is formed in a thin cylindrical shape that can be flexed and deformed by a metal material, and the number of teeth of each external tooth 36a is one less than the number of teeth of each internal tooth 27a of the first circular spline 27. ..

The wave generator 37 has a plurality of internal teeth 37b formed on the inner peripheral surface of the through hole 37a formed in a substantially annular shape and formed in the center. The elliptical outer peripheral surface of the wave generator 37 is in sliding contact with the planar inner peripheral surface of the flex spline 36.

The wave generator 37 is integrally formed with cylindrical protrusions on the inside of the inner peripheral portion, that is, on the front and rear hole edges in the axial direction of the through hole 37a. Then, the entire wave generator 37 is rotatably supported by two front and rear ball bearings 39 and 40 arranged between each protrusion and the first support groove of the fixing flange 24 and the second support groove of the cover 29, respectively. ing.

The second circular spline 38 is fixed to the inner end portion of the cover 29 by a plurality of (six in this embodiment) bolts 41 via the second thrust plate 42. Further, each internal tooth 38a of the second circular spline 38 has the same number of teeth as the external tooth 36a of the flex spline 36. Therefore, it is set to be one less than the number of teeth of each internal tooth 27a of the first circular spline 27. The reduction ratio is determined by such a difference in the number of teeth.

The drive motor 22 is a brushless electric motor, in which a tubular coil 46 fixed to the inner peripheral surface of a bottomed cylindrical motor casing 45 and a magnet rotor rotatably provided inside the coil 46. It is mainly composed of a 47 and a motor shaft 48 whose one end 48a is fixed to the center of the shaft of the magnet rotor 47.

The motor casing 45 is attached to the rear end of the cover 29 via an O-ring 50 by four bolts 49 that are inserted into a plurality of (four in this embodiment) boss portions formed on the outer periphery of the front end. Further, a connector portion 44 for inputting a control current from the control unit is integrally provided on the outer periphery of the motor casing 45.

In the magnet rotor 47, the magnetic poles of the positive electrode and the negative electrode are alternately arranged in the circumferential direction on the outer periphery, and a fixing hole 47a for press-fitting and fixing one end portion 48a of the motor shaft 48 is formed through the center of the shaft. ..

In the motor shaft 48, one end 48a and the other end 48b protruding from one end surface of the magnet rotor 47 are bearing by ball bearings 52 and 53, respectively. Further, on the outer peripheral surface of the tip end portion 48b of the other end portion 48b, external teeth 48c in which the internal teeth 37b of the wave generator 37 mesh with each other are formed.

A resolver 55 for detecting the rotation angle of the motor shaft 48 is arranged at a substantially central position in the axial direction of the motor shaft 48.
[Press-fitting device and press-fitting jig]
FIG. 6 is an enlarged plan view showing a slider plate and a pair of plate members used in the present embodiment, and FIG. 7 is an enlarged plan view showing a state in which an arm link is positioned and held by each plate member used in the present embodiment. FIG. 8 is a schematic view showing a state in which the second control shaft is press-fitted in a state where the arm link is supported by the support mechanism via the two plate members.

9 to 11 are side views showing a press-fitting process of the second control shaft, and FIG. 9 is a schematic view showing a state in which the housing body is lowered and each support pin is inserted into each jig insertion hole. In FIG. 10, after inserting each support pin into each jig insertion hole, the arm link and the second control link are inserted and arranged in the housing body via a guide mechanism, and the second control shaft is press-fitted into the arm link. FIG. 11 is a schematic view showing a state in which the second control shaft is press-fitted into the press-fitting hole of the arm link and the guide mechanism is moved backward.

12 to 15 are plan views showing a press-fitting process of the second control shaft, FIG. 12 is a schematic view of a state in which each jig insertion hole of the housing body is inserted into each support pin of the support mechanism, and FIG. 13 is a schematic view. A schematic view showing a state in which the arm link is housed in the housing body by the guide mechanism, FIG. 14 is a schematic view showing a state in which the guide mechanism is retracted after the second control shaft is press-fitted into the arm link, and FIG. It is the schematic which shows the state which moved backward further.

The press-fitting device shown in FIGS. 9 to 15 is used to assemble the second control shaft 11 and the arm link 13 in the support hole 30 of the housing body 28 and the second accommodation chamber 28b.

The press-fitting device is provided on the work base 70, and has a support mechanism 71 that supports the arm link 13 and the like from below via the housing body 28, and a guide that inserts and guides the arm link 13 inside the second accommodation chamber 28b. A mechanism 72 and a pressing mechanism 73 for press-fitting the press-fitting shaft portion 23b of the second control shaft 11 from above into the press-fitting hole 13c of the arm link 13 housed inside the second housing chamber 28b are provided.

The support mechanism 71 includes a support substrate 75 fixed to the upper surface of the work base 70, and support pins 76a to a plurality of (six in this embodiment) support jigs projecting from the upper surface of the support substrate 75. It is composed of 76f.

The support substrate 75 is formed in an elliptical plate shape by an iron-based metal material.

Each of the six support pins 76a to 76f is formed in the shape of a round bar by, for example, an iron-based metal material, and rises vertically from the upper surface of the support substrate 75, and their respective arrangements are defined. That is, as shown in FIG. 12, the three support pins 76a to 76c are axisymmetric positions centered on the axial center P of the support holes 30 corresponding to the formation positions of the three jig insertion holes 66a to 66c. It is provided at equal intervals in the circumferential direction). Further, one support pin 76d separated from these is provided at a position corresponding to the formation position of one jig insertion hole 66d.

Therefore, these four support pins 76a to 76d can be inserted into and detached from the three jig insertion holes 66a to 66c and one jig insertion hole 66d.

Further, the other two support pins 76e and 76f, which are the second support jigs, are arranged in the vicinity of the outer surface of the housing body 28 outside the housing body 28.

The outer diameters of the support pins 76a to 76f are set to be uniform, and are set to at least a size that can be inserted into the jig insertion holes 66a to 66d. Further, the lengths of the support pins 76a to 76f in the axial direction are set to be substantially the same. The three support pins 76a to 76c and the other one support pin 76d, which are in axially symmetrical positions, have their respective tip portions cured when the front end surface 28c of the housing body 28 abuts on the upper surface of the support substrate 75. It is arranged so as to project from the tip opening of the jig insertion holes 66a to 66d and face the inside of the second housing chamber 28b. The amount of protrusion of the four support pins 76a to 76d from the jig insertion holes 66a to 66d is set to about 0.5 mm. This protrusion amount can be arbitrarily changed depending on the embodiment.

Further, the three support pins 76a to 76c are projected at three points on one side surface of the arm link 13 via the two plate members 78 and 79 described later while inserting the corresponding three jig insertion holes 66a to 66c. It has come to support. That is, each of the support pins 76a to 76c is adapted to support three projection points around the hole edge portion of the press-fitting hole 13c near the solid portion 13a on the side surface of the arm link 13.

Then, when the second control shaft 11 is press-fitted into the arm link 13 described later, the six support pins 76a to 76f use the flat tip surface of the tip portion to hold the lower surface predetermined positions of the two plate members 78 and 79. It is designed to support contact.

As shown in FIGS. 6, 7, 9, and 12, the guide mechanism 72 includes a guide plate 77 that can slide from the horizontal direction toward the second accommodation chamber 28b at a position above the work base 70, and the guide plate. A pair of first and second plate members 78 and 79 provided on the tip end side of the 77 and mainly supporting the arm link 13, and provided on the rear end side of the guide plate 77 and previously connected to the arm link 13. It has a support portion 80 on which one end portion 12a of the second control link 12 is placed and supported, and a drive mechanism (not shown) for moving the guide plate 77 in the directions of the support pins 76a to 76f so as to be able to move forward and backward.

The guide plate 77 has, for example, an iron-based metal plate formed in a substantially L shape and integrally has a widening portion 77a extending in the sliding moving direction and a rear end side of the widening portion 77a, and is substantially perpendicular to the sliding moving direction. It has a narrow portion 77b extending in the direction. Plate members 78 and 79 are arranged on the upper surface of the tip of the widening portion 77a. In the narrow width portion 77b, the support portion 80 is fixed to the upper surface at a substantially central position in the longitudinal direction by, for example, welding, bolts, rivets, or the like.

As shown in FIGS. 6 and 7, the first and second plate members 78 and 79 are each formed in a scissors shape by, for example, a flat plate of an iron-based metal.

The first plate member 78 on the left side of FIG. 6 is formed by connecting two upper and lower plates 78a and 78b in a state of being overlapped by a plurality of rivets 81. Further, in the first plate member 78, the base side of the two bonded plates 78a and 78b is fixed to the upper surface of the guide plate 77 by, for example, a plurality of (two in the present embodiment) bolts 82. As the fixing means, other means such as welding and rivets may be used in addition to the bolts.

The upper plate 78a is formed in a substantially L-shape, and a substantially L-shaped arc-shaped notch 78c is formed inside the tip portion to form a tapered shape. On the other hand, the lower plate 78b is arranged so as to be displaced in the longitudinal direction and the lateral direction with respect to the upper plate 78a. Due to this displaced arrangement, a first stepped portion 83, which is a positioning portion that follows the shape of one side of the solid portion 13a of the arm link 13, is formed between the plates 78a and 78b.

The first step portion 83 mounts and supports a part of one outer surface of the bifurcated portion 13b of the arm link 13 and the lower surface of one side portion of the solid portion 13a on the lower plate 78b. Further, the tip end portion of the notch portion 78c of the upper plate 78a abuts and supports one side surface of the solid portion 13a from the lateral direction. As a result, one side of the arm link 13 is positioned and held. Further, the lower plate 78b has a substantially U-shaped groove 78d formed at the tip thereof. When the arm link 13 is set in the housing main body 28 (second accommodation chamber 28b), the groove portion 78d slides and guides one end portion in the axial direction protruding outward of the connecting pin 14. Further, on the bottom side of the U-shaped groove 78d, a lower mounting portion 78e for mounting and supporting one end surface of one end of the connecting pin 14 set in the second storage chamber 28b is integrally provided. .. The arm link 13 is positioned on the first plate member 78 by mounting and supporting one end of the connecting pin 14 on the mounting portion 68e.

The second plate member 79 on the right side of FIG. 6 is similarly arranged by overlapping two upper and lower plates 79a and 79b, and the rectangular bases of each other are overlapped by, for example, a plurality of (four in this embodiment) rivets 81. Combined in the state.

The upper plate 79a has an arc portion 79c notched inside the tip portion to support the other side surface of the solid portion 13a. The lower plate 79b has a rectangular tip portion that extends longer than the tip portion of the upper plate 79a, and a second step portion 84 that is a positioning portion is formed between the lower plate 79b and the arc portion 79c. In the second step portion 84, the lower surface of the other side portion of the solid portion 13a of the arm link 13 is placed and supported on the tip end portion of the exposed lower plate 79b. The tip of the arc portion 79c of the upper plate 79a abuts and supports the other side surface of the solid portion 13a from the lateral direction. As a result, the other side portion of the arm link 13 is positioned and held.

Therefore, the arm link 13 is placed and supported while being positioned on the two plate members 78 and 79.

Further, the second plate member 79 can swing (open / close) with respect to the first plate member 78 about a support shaft 85 which is a swing fulcrum provided on the base side. That is, the tip of the second plate member 79 is provided so as to be able to open and close in the left-right direction like scissors with respect to the tip of the first plate member 78.

Further, as shown in FIG. 6 and the like, the tip of the second plate member 79 is urged in the closing direction by a pair of coil springs 86a and 86b which are elastic members provided inside the rear end of each base. There is. One end of each of the coil springs 86a and 86b is elastically supported inside the box-shaped spring retainer 87, and the other end of each coil spring 86a and 86b is elastically supported by the inner portion of the base of the second plate member 79.

Therefore, as shown in FIG. 7, the first and second plate members 78 and 79 have the spring force of the coil springs 86a and 86b on the solid portion 13a of the arm link 13 mounted on the stepped portions 83 and 84. Sandwiched by. As a result, the arm link 13 is held on the stepped portions 83 and 84 via elastic force while being positioned together with the other end portion 12b of the second control link 12 via the connecting pin 14. In this state, a part of each tip of each of the plate members 78 and 79 is inserted into the space between the bifurcated portions 13b and 13b of the arm link 13.

Further, when the first and second plate members 78 and 79 are set in the second accommodation chamber 28b together with the arm link 13 by the guide mechanism 72, the predetermined positions on the lower surfaces thereof are the first to sixth supports. The pins 76a to 76f are contacted and supported by the flat tip surface of each tip.

Further, the second plate member 79 includes a long hole-shaped angle adjusting hole 88 provided on the base side, and an adjusting bolt 89 that defines an opening / closing angle position of the second plate member 79 via the angle adjusting hole 88. The opening / closing angle can be adjusted arbitrarily.

The first and second plate members 78 and 79 each use two plates to secure the first and second stepped portions 83 and 84, but each of the first and second plate members 78 and 79 is composed of one plate. It is also possible to form the stepped portions 83 and 84 by cutting or the like.

The support portion 80 has an arcuate groove 80a at the ends on the side of both plate members 78 and 79 on which a part of the tip end side of the second control link 12 12a is placed and held.

The drive mechanism is composed of, for example, an electric motor or a speed reduction mechanism. It is also possible to configure the drive mechanism with a hydraulic motor or a hydraulic cylinder.

As shown in FIGS. 8 and 10, the pressing mechanism 73 has a substantially cylindrical shape that pushes down the shaft portion main body 23 from above toward the press-fitting hole 13c direction (white arrow direction) of the arm link 13 in the housing main body 28. It has a pressing portion 90 and a pressing driving portion (not shown) that applies a load downward to the pressing portion 90.

The pressing portion 90 integrally has a flange portion 90a that presses the fixing flange 24 from above on the outer periphery on the lower end side in the drawing.

The pressing drive unit is composed of, for example, a hydraulic cylinder, and the hydraulic cylinder calculates a predetermined press-fitting load by an electronic controller (not shown) and transmits it to the pressing unit.

[Method of press-fitting the second control shaft into the arm link]
Hereinafter, a method of press-fitting the press-fitting shaft portion 23b of the second control shaft 11 into the press-fitting hole 13c of the arm link 13 in the second accommodating chamber 28b of the housing body 28 will be described.

First, as shown in FIG. 9, the support mechanism 71 is previously placed at a predetermined position on the work base 70 via the support substrate 75 with the first to sixth support pins 76a to 76f facing upward. Keep it fixed.

Further, at this point, as shown in FIGS. 9 and 12, the arm link 13 is in a state of being previously connected to the other end 12b of the second control link 12 by the connecting pin 14. Further, the other end 12b of the arm link 13 and the second control link 12 is placed and held while being positioned on the first and second plate members 78 and 79 of the guide mechanism 72.

That is, as shown in FIG. 7, the other end 12b of the arm link 13 and the second control link 12 is slightly opened by the second plate member 79 against the spring forces of the coil springs 86a and 86b. Then, it is placed on the upper surfaces of the first and second stepped portions 83 and 84. Then, the second plate member 79 is returned in the closing direction by the spring return force of the coil springs 86a and 86b, and is in a state of sandwiching the solid portion 13a in cooperation with the first plate member 78. As a result, the arm link 13 is stably placed and held while being positioned on the upper surfaces of the stepped portions 83 and 84 of the first and second plate members 78 and 79.

At this point, one end 12a of the second control link 12 is placed and supported in the arcuate groove 80a of the support 80.

After that, as shown in FIGS. 9, 10 and 12, the housing main body 28 is moved downward with the front end surface 28c facing downward. When the housing body 28 moves downward, the four support pins 76a to 76d are positioned from the respective lower openings while positioning the corresponding four jig insertion holes 66a to 66d with respect to the four support pins 76a to 76d. To insert. Further, the housing body 28 is lowered and the support pins 76a to 76d are inserted until the front end surface 28c of the housing body 28 comes into contact with the upper surface of the support substrate 75 (first step).

Then, in this state, the tips of the four support pins 76a to 76d protrude into the second storage chamber 28b. Further, the other two support pins 76e and 76f are in a state of standing up outside the outer surface of the housing body 28.

Next, as shown in FIG. 12, the guide plate 77 is slid horizontally in the direction of the second accommodation chamber 28b (white arrow) by the drive mechanism. As a result, the other end 12b of the arm link 13 and the second control link 12 is laterally inserted into the second accommodating chamber 28b together with the first and second plate members 78 and 79, and slides at the set position. Stop moving.

Then, the lower surfaces of the first and second plate members 78 and 79 come into contact with the tip surfaces of the tips of the six support pins 76a to 76f at appropriate positions, and are lowered to the support pins 76a to 76f. Becomes supported by.

Next, as shown in FIGS. 10 and 13, the shaft portion main body 23 of the second control shaft 11 is inserted into the press-fitting hole 13c of the arm link 13 from the tip portion (first journal portion 23a) side by the pressing mechanism 73. To do. Then, the outer peripheral surface of the press-fitting shaft portion 23b is press-fitted into the press-fitting hole 13c from the axial direction, and is pressed until the first step edge 23d abuts on one side hole edge (second step).

At this time, the press-fitting load F (load in the arrow direction) of the second control shaft 11 is applied to the tip surfaces of all six support pins 76a to 76f via the arm link 13 and the first and second plate members 78 and 79. You can receive it at.

This press-fitting load is most applied to the three support pins 76a to 76c in the vicinity of the press-fitting hole 13c, but is received by the other support pins 76d to 76f in the entire first and second plate members 78 and 79. .. Therefore, it acts substantially uniformly on one side surface of the arm link 13.

After that, as shown in FIGS. 11, 14 and 15, when the guide plate 77 is gradually moved backward in the direction of the white arrow by the drive mechanism, the first and second plate members 78 and 79 become the guide plate 77. Together, they move away from the arm link 13 and the second control link 12 and gradually move back to their original positions.

At this time, the arc portion 79c of the second plate member 79 retracts while sliding on the convex other side surface of the solid portion 13a of the arm link 13. Therefore, a force in the opening direction is applied to the second plate member 79, and the coil springs 86a and 86b are automatically oscillated in the opening direction once against the spring force. Therefore, the both plate members 78 and 79 enable the guide plate 77 to move backward while reducing the sliding resistance of the solid portion 13a with the outer peripheral surface.

Subsequently, when the arc portion 79c of the second plate member 79 separates from the solid portion 13a, the second plate member 79 automatically swings in the closing direction by the spring forces of the coil springs 86a and 86b.

At the same time, one end 12a of the second control link 12 also gradually separates from the arcuate groove 80a of the support 80.

After that, the housing body 28 is pulled up with the second control shaft 11 and the arm link 13 connected to each other, and is removed from the support mechanism 71. That is, the housing main body 28 is removed from the support mechanism 71 while the four support pins 76a to 76d are pulled out from the four jig insertion holes 66a to 66d (third step).

As a result, a series of press-fitting operations of the second control shaft 11 with respect to the arm link 13 are completed.

As described above, in the present embodiment, the second control shaft 11 and the arm link 13 are separately formed, and the arm link 13 is connected to the shaft portion main body 23 in the second accommodation chamber 28b. I made it. Therefore, unlike the case where both 23 and 13 are integrally formed, it is not necessary to form a large inner diameter of the motor shaft insertion hole 30 of the housing main body 28 in order to insert the arm link 13, and the housing main body 28 is also formed. There is no need to divide the top and bottom.

Therefore, the increase in size of the housing 20 as a whole can be suppressed, and the size and weight of the housing 20 can be reduced. As a result, the mountability of the variable compression ratio mechanism in the engine is improved.

Further, by separating the second control shaft 11 and the arm link 13, the degree of freedom in the length of the arm link 13 is improved, and the length can be set longer according to the size of the second accommodation chamber 28b. it can. Therefore, it is possible to reduce the reverse input load from the second control link 12 to the second control shaft 11 side. As a result, the load on the speed reducer 21 and the drive motor 22 can be reduced.

Further, in the present embodiment, the second control shaft 11 is press-fitted into the arm link 13 in the housing body 28 with the first and second plate members 79 interposed between the support pins 76a to 76f and the arm link 13. Let me do it.

As a result, the arm link 13 does not directly receive the reaction force of the pressing load (press-fitting load F) by the pressing mechanism 73 from the support pins 76a to 76f as in the prior art, but the first and second plate members. 78,79 receive directly. Therefore, the arm link 13 can avoid the generation of local concentrated stress.

In other words, the press-fitting load on the arm link 13 can be dispersed by receiving the load in the opposite direction of the support pins 76a to 76f by the press-fitting load F of the pressing mechanism 73 by the first and second plate members 79. .. As a result, local concentrated stress on the arm link 13 from the support pins 76a to 76f can be avoided. As a result, it is possible to suppress the occurrence of plastic deformation of the arm link 13.

In particular, in the present embodiment, six support pins 76a to 76f are used to widely support not only the arm link 13 side but also the lower surfaces of the plate members 78 and 79 away from the arm link 13. This makes it possible to more effectively disperse the press-fitting load on the arm link 13 described above. Therefore, the generation of local concentrated stress on the arm link 13 can be sufficiently avoided.

Further, the three support pins 76a to 76c arranged at axially symmetrical positions support one side surface of the arm link 13 near the solid portion 13a via the plate members 78 and 79. Therefore, the press-fitting load F received from the three support pins 76a to 76c via the plate members 78 and 79 acts on the vicinity of the solid portion 13a having high rigidity, so that the plastic deformation of the arm link 13 is further caused. Can be effectively suppressed.

Further, in the present embodiment, since the arm link 13 and the like are accommodated in the second accommodation chamber 28b by using the guide mechanism 72 having high moving position accuracy, the positioning accuracy in the second accommodation chamber 28b is improved.

Further, when the arm link 13 or the like is housed in the second storage chamber 28b, a part of the first and second plate members 78 and 79 is located outside the housing main body 28 (second storage chamber 28b). .. However, the tip surfaces of the other two support pins 76e and 76f are abutted and supported at these externally located portions. Therefore, the plate members 78 and 79 can be abutted and supported in a well-balanced manner by the unique arrangement of the six support pins 76a to 76f as a whole, and the flatness can be easily obtained. As a result, the inclination of the plate members 78, 79 and the arm link 13 at the time of press fitting can be sufficiently suppressed.

Further, the arm link 13 is supported by three support pins 76a to 76c via the first and second plate members 79 at axially symmetrical positions centered on the press-fitting hole 13c, that is, at three projection positions. There is. Therefore, the arm link 13 can suppress the inclination from any direction even if the above-mentioned press-fitting load F acts.

As described above, the first and second plate members 78 and 79 are separated from the arm link 13 by the guide plate 77 by utilizing the opening / closing operation when the press-fitting work of the second control shaft 11 into the arm link 13 is completed. It is possible to move to. Therefore, some of the support pins 76e and 76f can be installed at a position away from the projected position of the arm link 13.

When the second control shaft 11 is press-fitted into the arm link 13, the arm link 13 can be advanced to the second accommodation chamber 28b side simply by moving the arm link 13 horizontally via the guide mechanism 72. Therefore, the press-fitting work becomes easy, the work efficiency can be improved, and the cost can be reduced.

The arm link 13 can be stably and reliably positioned with respect to the first and second plate members 78 and 79 via the first and second stepped portions 83 and 84. As a result, the accuracy of the press-fitting operation of the second control shaft 11 is improved. Further, the positioning of the arm link 13 can be configured with a simple structure.

Further, since the arm link 13 is automatically positioned by being sandwiched by the elastic forces of the coil springs 86a and 86b between the first and second plate members 78 and 79, this positioning operation becomes easy.

Further, the press-fitting work of the second control shaft 11 to the arm link 13 is performed by inserting and detaching the support pins 76a to 76d into the four jig insertion holes 66a to 66d provided in the housing body 28. Therefore, these series of press-fitting operations are facilitated, and the press-fitting work efficiency can be improved.

The press-fitting method and the press-fitting device of the present invention can be applied not only to the actuator of the variable compression ratio mechanism of the present embodiment but also to other devices.

Further, in the above-described embodiment, the number of each support pin 76a to 76f is 6, but the present invention is not limited to this, and for example, 6 or less or 6 or more support pins may be provided. Moreover, the arrangement of each support pin can be arbitrarily set.

Further, in the first and second plate members 78 and 79, the second plate member 79 can be opened and closed with the support shaft 85 as a fulcrum, but the second plate member 79 is fixed to open and close the first plate member 78. It is also possible to make it possible. In addition, both can be opened and closed via a support shaft.

Further, although the first and second plate members, 78 and 79 are each composed of two upper and lower plates, each of the first and second plate members may be composed of one plate member.

Further, the elastic member for urging the second plate member 79 in the closing direction may be a spring member other than the coil springs 86a and 86b, for example, a torsion coil spring.

As the press-fitting method, press-fitting device, and press-fitting jig based on the above-described embodiment, for example, those having the following aspects can be considered.

That is, as a preferred embodiment in the present invention, there is a second surface made of a single member and provided with a first opening and a second surface having a different angle with respect to the first surface and provided with a second opening. It has a surface and a plurality of jig insertion holes provided so as to face the opening direction of the second opening, and the first opening, the second opening, and the jig insertion hole are formed. With a housing that communicates inside
A first member inserted into the first opening and provided with a press-fitting fixing portion at a position located in the housing.
A second member that is inserted into the second opening and is press-fitted and fixed to the press-fitting and fixing portion of the first member is provided.
A press-fitting method in which the second member is press-fitted and fixed to the press-fitting fixing portion of the first member.
A plurality of support jigs are inserted into the jig insertion holes, the first member arranged on one side surface of the plate member is inserted into the first opening, and the other side surfaces of the plate member are inserted into the first opening. The process of arranging at the tip of the support jig and
A step of inserting the second member into the second opening and press-fitting the second member into the press-fitting fixing portion of the first member.
It has a step of taking out the plate member from the first opening and ejecting the support jigs from the jig insertion holes.

More preferably, when the plate member is inserted into the first opening together with the first member, a part of the plate member is located outside the housing and is located outside the housing of the plate member. The other side surface of the part of the portion is supported by the tips of a plurality of second support jigs other than the respective support jigs.

More preferably, each of the support jigs abuts and supports three projection portions of the first member sandwiching the plate member.

More preferably, each of the second support jigs abuts and supports three locations on the other side surface of the portion of the plate member located outside the housing.

More preferably, the plate member is composed of a plurality of members, and the plurality of plate members can be separated from each other in the opening direction after the second member is press-fitted into the press-fitting fixing portion of the first member. ing.

More preferably, the plurality of plate members are configured to be urged to each other in the closing direction by the elastic member, and when the plurality of plate members are taken out from the first opening, the plurality of plate members are among the plurality of plate members. When the end portions come into contact with the second member, they move in the opening direction with respect to the urging force of the elastic member.

More preferably, the plurality of plate members are composed of two first plate members and a second plate member, and the second plate member can be opened and closed with respect to the first plate member about a swing fulcrum. It has become.

More preferably, the first member is composed of a first link having the press-fitting fixing portion and a link pin, and a second link oscillating around the link pin of the first link.
The plate member is provided with a recess that can come into contact with the side surface of the link pin, and when the first member is arranged on the plate member, the link pin comes into contact with the recess to cause the first member. Is positioned.

More preferably, the plate member is provided with a positioning portion capable of positioning the side surface of the first link.

More preferably, the positioning portion is composed of a stepped portion that follows the shape of the outer peripheral surface of the first link.

More preferably, the plate member is composed of a first plate member and a second plate member.
The second plate member can swing in the opening / closing direction with respect to the first plate member around the swing fulcrum.
The step portion is provided on both the first plate member and the second plate member.
The first link is positioned so that the outer peripheral surface of the first link is sandwiched between the step portion provided on the first plate member and the step portion provided on the second plate member. It has become.

The first member is composed of a first link having the press-fitting fixing portion and a link pin, and a second link oscillatingly provided around the link pin.
The position where the link pin of the first link is provided has a partially bifurcated structure.
At least a part of the tip of the support jig is positioned on the projection surface of the portion other than the bifurcated structure portion.

In another preferred embodiment, a first surface made of a single member and provided with the first opening, and a second surface having a different angle with respect to the first surface and provided with the second opening. It has a plurality of jig insertion holes provided so as to face the opening direction of the second opening, and the first opening, the second opening, and the jig insertion hole communicate with each other internally. Housing and
A first member inserted into the first opening and provided with a press-fitting fixing portion at a position located in the housing.
A second member that is inserted into the second opening and is press-fitted and fixed to the press-fitting and fixing portion of the first member is provided.
A press-fitting device for press-fitting and fixing the second member to the press-fitting fixing portion of the first member.
A plurality of support jigs that can be inserted into each of the plurality of jig insertion holes of the housing,
A plate member that is inserted into the first opening and can be interposed between each of the support jigs and the first member.
The second member is provided with a pressing portion for applying a load toward the press-fitting fixing portion of the first member.

In another preferred embodiment, a first surface made of a single member and provided with the first opening, and a second surface having a different angle with respect to the first surface and provided with the second opening. It has a plurality of jig insertion holes provided so as to face the opening direction of the second opening, and the first opening, the second opening, and the jig insertion hole communicate with each other internally. Housing and
A first member inserted into the first opening and provided with a press-fitting fixing portion at a position located in the housing.
A second member that is inserted into the second opening and is press-fitted and fixed to the press-fitting and fixing portion of the first member is provided.
A press-fitting jig used for press-fitting and fixing the second member to the press-fitting fixing portion of the first member.
A plurality of support jigs that can be inserted into each of the plurality of jig insertion holes of the housing,
A plate member inserted into the first opening and interposed between the plurality of support jigs and the first member.
Is equipped with.

11 ... 2nd control shaft (2nd member), 12 ... 2nd control link (1st member / 2nd link), 12a ... one end, 12b ... other end, 13 ... arm link (first member), 13a ... Solid part, 13b ... Bifurcated part, 13c ... Press-fitting hole (press-fitting fixing part), 14 ... Connecting pin, 20 ... Housing, 21 ... Reducer, 22 ... Drive motor, 23 ... Shaft body, 23b ... Press-fitting shaft Part, 28 ... Housing body, 28a ... First accommodation chamber (second opening), 28b ... Second accommodation chamber (first opening), 28c ... Front end surface (second surface), 30 ... Support hole, 30a ... 1st bearing hole, 30b ... 2nd bearing hole, 66a to 66d ... Jig insertion hole, 70 ... Working base, 71 ... Support mechanism 71 ... Guide mechanism, 73 ... Pressing mechanism, 75 ... Support substrate, 76a to 76f ... Support pin (support jig, second support jig),
78 ... 1st plate member, 78d ... Groove, 79 ... 2nd plate member, 83/84 ... 1st and 2nd stepped parts (positioning part), 86a / 86b ... Coil spring (elastic member), 89 ... Support shaft ( fulcrum).

Claims (14)

A first surface made of a single member and provided with a first opening, a second surface having a different angle with respect to the first surface and provided with a second opening, and an opening of the second opening. A housing that has a plurality of jig insertion holes provided so as to face each other in the direction, and the first opening, the second opening, and the jig insertion hole communicate with each other inside.
A first member inserted into the first opening and provided with a press-fitting fixing portion at a position located in the housing.
A second member that is inserted into the second opening and is press-fitted and fixed to the press-fitting and fixing portion of the first member is provided.
A press-fitting method in which the second member is press-fitted and fixed to the press-fitting fixing portion of the first member.
A plurality of support jigs are inserted into the jig insertion holes, the first member arranged on one side surface of the plate member is inserted into the first opening, and the other side surfaces of the plate member are inserted into the first opening. The process of arranging at the tip of the support jig and
A step of inserting the second member into the second opening and press-fitting the second member into the press-fitting fixing portion of the first member.
A step of taking out the plate member from the first opening and ejecting the support jigs from the jig insertion holes.
Press-fitting method having. When the plate member is inserted into the first opening together with the first member, a part of the plate member is located outside the housing, and a part of the plate member is located outside the housing of the plate member. The press-fitting method according to claim 1, wherein the other side surface of the portion is supported by the tips of a plurality of second support jigs other than the respective support jigs. The press-fitting method according to claim 1, wherein each of the support jigs abuts and supports three projection portions of the first member sandwiching the plate member. The press-fitting method according to claim 2, wherein each of the second support jigs abuts and supports three other side surfaces of a portion of the plate member located outside the housing. The plate member is composed of a plurality of members, and the plurality of plate members can be separated from each other in the opening direction after the second member is press-fitted into the press-fitting fixing portion of the first member. The press-fitting method according to claim 1. The plurality of plate members are configured to be urged to each other in the closing direction by the elastic member, and when the plurality of plate members are taken out from the first opening, the inner end portions of the plurality of plate members are said to be. The press-fitting method according to claim 5, wherein the elastic member moves in the opening direction against the urging force of the elastic member by coming into contact with the second member. The plurality of plate members are composed of two first plate members and a second plate member, and the second plate member can be opened and closed with respect to the first plate member about a swing fulcrum. 5. The press-fitting method according to claim 5. The first member is composed of a first link having the press-fitting fixing portion and a link pin, and a second link swayably provided around the link pin of the first link.
The plate member is provided with a recess that can come into contact with the side surface of the link pin, and when the first member is arranged on the plate member, the link pin comes into contact with the recess to cause the first member. The press-fitting method according to claim 1, wherein the is positioned. The press-fitting method according to claim 8, wherein the plate member is provided with a positioning portion capable of positioning the side surface of the first link. The press-fitting method according to claim 9, wherein the positioning portion is formed of a step portion that follows the shape of the outer peripheral surface of the first link. The plate member is composed of a first plate member and a second plate member.
The second plate member can swing in the opening / closing direction with respect to the first plate member around the swing fulcrum.
The step portion is provided on both the first plate member and the second plate member.
The first link is positioned by sandwiching the outer peripheral surface of the first link between the step portion provided on the first plate member and the step portion provided on the second plate member. The press-fitting method according to claim 10. The first member is composed of a first link having a press-fitting fixing portion and a link pin, and a second link oscillating around the link pin.
The position where the link pin of the first link is provided has a partially bifurcated structure.
The press-fitting method according to claim 1, wherein at least one of the support jigs has at least a part of its tip positioned on a projection surface of a portion other than the bifurcated structure portion. A first surface made of a single member and provided with a first opening, a second surface having a different angle with respect to the first surface and provided with a second opening, and an opening of the second opening. A housing that has a plurality of jig insertion holes provided so as to face each other in the direction, and the first opening, the second opening, and the jig insertion hole communicate with each other inside.
A first member inserted into the first opening and provided with a press-fitting fixing portion at a position located in the housing.
A second member that is inserted into the second opening and is press-fitted and fixed to the press-fitting and fixing portion of the first member is provided.
A press-fitting device for press-fitting and fixing the second member to the press-fitting fixing portion of the first member.
A plurality of support jigs that can be inserted into each of the plurality of jig insertion holes of the housing,
A plate member that is inserted into the first opening and can be interposed between each of the support jigs and the first member.
A pressing portion that applies a load toward the press-fitting fixing portion of the first member, and a pressing portion.
A press-fitting device characterized by being equipped with. A first surface made of a single member and provided with a first opening, a second surface having a different angle with respect to the first surface and provided with a second opening, and an opening of the second opening. A housing that has a plurality of jig insertion holes provided so as to face each other in the direction, and the first opening, the second opening, and the jig insertion hole communicate with each other inside.
A first member inserted into the first opening and provided with a press-fitting fixing portion at a position located in the housing.
A second member that is inserted into the second opening and is press-fitted and fixed to the press-fitting and fixing portion of the first member is provided.
A press-fitting jig used for press-fitting and fixing the second member to the press-fitting fixing portion of the first member.
A plurality of support jigs that can be inserted into each of the plurality of jig insertion holes of the housing,
A plate member inserted into the first opening and interposed between the plurality of support jigs and the first member.
A press-fitting jig characterized by being equipped with.

Images