JP4384584B2 - Connecting rod alignment device - Google Patents

Description

  The present invention relates to a connecting rod aligning device that aligns the positions of a cap part and a main body part when connecting a cap part broken from a large end part and the main body part to provide a connecting rod.

  As shown in FIG. 7, a connecting rod (hereinafter also referred to as a connecting rod) 1 is provided with a first through hole 2 at the tip, while the other end is larger than the first through hole 2. A second through-hole 3 having a diameter is provided. Generally, the distal end portion on the side where the first through hole 2 is provided is referred to as a small end portion 4, and the other end portion on the side where the second through hole 3 is provided is referred to as a large end portion 5.

  The large end 5 of the connecting rod 1 breaks in the direction (Y direction) perpendicular to the longitudinal direction (X direction in FIG. 8) of the connecting rod 1 near the center of the second through hole 3 with the groove C as a boundary. Accordingly, the connecting rod 1 is divided into the main body portion 6 and the cap portion 7. The main body 6 and the cap 7 are connected to each other by a bolt (not shown) inserted into the bolt hole 8.

  A piston pin constituting an internal combustion engine is inserted into the first through hole 2 of the connecting rod 1 thus configured through a bearing, and the piston pin is passed through the piston. A crankshaft pin is pivotally supported in the second through hole 3 via a bearing different from the bearing. That is, the connecting rod 1 is a member that functions to connect a piston and a crankshaft of an internal combustion engine and to transmit the rotational driving force of the crankshaft to the piston.

  For example, as shown in FIG. 8, this type of connecting rod 1 is formed by forging a preform PR in which the main body 6 and the cap 7 are integrally provided as the same member, and then starting from the groove C. The main body part 6 and the cap part 7 are broken and further manufactured by connecting the main body part 6 and the cap part 7 through bolts passed through the bolt holes 8.

  By the way, at the time of this connection, it is desired that the fracture surface of the main body portion 6 and the fracture surface of the cap portion 7 abut on each other with high accuracy. For this reason, it is necessary to align the main-body part 6 and the cap part 7 with high precision. When the alignment accuracy is low, the main body 6 and the cap 7 are displaced from each other along the direction perpendicular to the longitudinal direction of the connecting rod 1 (X direction in FIG. 7), that is, the Y direction or the Z direction. It may become in a state. In this case, the bolt cannot be inserted into the bolt hole 8 or cannot be screwed even if it is a bolt inserted into the bolt hole 8.

  That is, in an environment where the main body portion 6 and the cap portion 7 easily cause misalignment, the connection between the main body portion 6 and the cap portion 7 becomes difficult, and for this reason, the manufacturing yield of the connecting rod 1 decreases. This causes problems such as a decrease in production efficiency.

  In order to avoid such a problem, the present applicant has proposed a technique for connecting the main body portion and the cap portion with high accuracy in Patent Document 1.

Japanese Patent Laid-Open No. 11-2230

  The present invention has been made in connection with the above-described technology, and it is possible to accurately align the main body portion and the cap portion, and for this reason, a connecting rod position capable of efficiently producing a connecting rod. An object is to provide a mating device.

In order to achieve the above object, the present invention provides a main body portion in which a first through hole is formed at a tip portion of a shaft portion and a part of a second through hole is formed at the other end portion of the shaft portion. When the connecting rod having the first through-hole and the second through-hole is provided by connecting the cap portion having the remaining portion of the second through-hole, the body portion and the cap portion are aligned. A connecting rod alignment device for performing
The base,
A first pedestal on which the main body is placed;
A second pedestal on which the cap portion is placed;
A first positioning portion that protrudes from the through hole of the first pedestal and contacts the first inner peripheral wall of the first through hole;
A second positioning part that contacts the second inner peripheral wall of the second through hole divided on the cap part side;
A third positioning portion that contacts the third inner peripheral wall of the second through hole divided on the main body portion side and stops the advancement toward the cap portion of the main body portion;
An elastic member that elastically biases the second positioning portion in a direction away from the third positioning portion;
A guide member laid on the base for guiding the first positioning portion and the second positioning portion;
A first displacement mechanism capable of displacing the first positioning portion;
A second displacement mechanism capable of displacing the second positioning portion;
A damming member for damming the cap portion displaced by the elastic member being elastically biased and displacing the second positioning portion in a direction away from the third positioning portion;
It is characterized by providing.

  By setting it as such a structure, while being able to position a main-body part with a 1st positioning part and a 3rd positioning part, a cap part can be positioned with a 2nd positioning part and a dam member. At this time, since the fracture surface of the main body portion and the fracture surface of the cap portion face each other, when the main body portion and the cap portion are connected, it is possible to avoid the positional displacement of the main body portion and the cap portion. it can.

  That is, according to the present invention, it is possible to align the main body portion and the cap portion with high accuracy, and therefore, the connection between the main body portion and the cap portion is facilitated. For this reason, the manufacturing yield of the connecting rod can be improved and the production can be efficiently performed.

  The first pedestal may be configured to have the third pedestal provided with the third positioning portion while placing the tip portion provided with the first through hole of the main body portion. In this case, what is necessary is just to mount the other end side of a main-body part on a 3rd base.

  That is, in this case, the main body is placed on two pedestals, the first pedestal and the third pedestal. Thus, by dividing the pedestal, the maintenance work of the connecting rod alignment device can be easily performed.

  In addition, each of the first positioning portion, the second positioning portion, and the third positioning portion includes a first inner peripheral wall of the first through hole, a second inner peripheral wall of the second through hole divided on the cap portion side, and a main body. It is preferable that the first inner peripheral wall, the second inner peripheral wall, and the third inner peripheral wall are in contact with each other via a curved surface having a shape corresponding to the shape of the third inner peripheral wall of the second through hole divided on the part side. In this case, the main body portion is guided to the curved surfaces of the first positioning portion and the third positioning portion, and the cap portion is guided to the curved surfaces of the second positioning portion. Thereby, the precision of alignment of a main-body part and a cap part can further be improved.

  Furthermore, it is preferable that the elastic member has a function of suppressing the swinging of the cap portion and bringing the cap portion into contact with the damming member. Thereby, the precision of alignment with a main-body part and a cap part can be improved further.

  According to the present invention, the main body portion is positioned by the first positioning portion and the third positioning portion, and the cap portion is positioned by the second positioning portion and the damming member. For this reason, since the precision of alignment with the fracture surface of a main-body part and the fracture surface of a cap part improves, it becomes easy to connect a main-body part and a cap part, in other words, to produce a connecting rod. As a result, the manufacturing yield of the connecting rod can be improved, and the connecting rod can be produced efficiently.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a connecting rod positioning device according to the present invention will be described in detail with reference to the accompanying drawings by giving preferred embodiments in relation to a connecting device having the connecting rod positioning device.

  FIG. 1 is a schematic overall perspective view of a connecting device 100. A connecting rod positioning device (hereinafter also simply referred to as a positioning device) 10 according to the present embodiment is incorporated in the connecting device 100. FIG.

  First, the alignment apparatus 10 will be described with reference to FIG. 2 which is a schematic perspective view of a main part, FIG. 3 which is a partially sectional side view, and FIG. The alignment device 10 includes a base 12 on which a sliding contact plate 11 provided with a long groove (not shown) is attached to a lower end surface, and a guide rail 14 (guide member) laid on the base 12. ), Two columnar members 16a and 16b erected on the base 12 so as to surround the guide rail 14 along the longitudinal direction, and the upper end surfaces of the columnar members 16a and 16b and the longitudinal direction of the columnar members 16a and 16b. The first pedestal 18 and the second pedestal 20 that are positioned and fixed to the end, and the third pedestal that is fixed between the first pedestal 18 and the second pedestal 20 and close to the second pedestal 20. 22.

  In the base 12, a rod connecting plate 23 to which a rod 114 of a displacement cylinder 110 described later is connected is fitted to one end surface of which a part is cut out.

  In addition, a first engagement member 24 having a concave portion that engages with the guide rail 14 is placed on one end of the wide and thick flat plate-shaped guide rail 14 (see FIG. 2). Has been. A flat plate 26 is provided on the upper end surface of the first engagement member 24, and a connecting plate 28 is provided on one end of the flat plate 26. A pressing plate 30 is fixed to one end face of the flat plate 26 and the connecting plate 28, and a rod 34 of a first cylinder 32 that is a first displacement mechanism is connected to the pressing plate 30.

  A first positioning member 40 is erected on the other end of the flat plate 26 via spacers 36 and 38 (see FIG. 3). The first positioning member 40 reaches the first through hole 2 of the connecting rod 1 through the through hole 42 provided in the first base 18. As understood from this, the first positioning member 40 follows the displacement of the first engagement member 24 on the guide rail 14 as the rod 34 of the first cylinder 32 moves forward and backward. To be displaced.

  The first positioning member 40 is provided with a curved surface 44 having a shape corresponding to the shape of the first inner peripheral wall S1 in the first through hole 2 of the connecting rod 1 (see FIG. 4). As will be described later, the curved surface 44 comes into contact with the cap portion 7 side of the first inner peripheral wall S1 in the first through hole 2.

  Similarly, a second engagement member 46 having a recessed portion that engages with the guide rail 14 is provided on the other end of the guide rail 14 (see FIG. 2) (see FIG. 3). ). A spacer 48 and a displacement plate 50 longer than the spacer 48 are erected on the upper end surface of the second engagement member 46, and the displacement plate 50 is positioned by a nut 52. Bolts 54 are screwed together. And the rod 58 which comprises the 2nd cylinder 56 as a 2nd displacement mechanism is in contact with the head of this volt | bolt 54. FIG.

  On the other hand, a second positioning member 62 is erected on the spacer 48 via a further spacer 60. The second positioning member 62 reaches the second through hole 3 of the connecting rod 1 through the through hole 63 of the second pedestal 20. Moreover, the 2nd positioning member 62 has the curved surface 64 of the shape corresponding to the shape of 2nd internal peripheral wall S2 in the 2nd through-hole 3 of the cap part 7 (refer FIG. 4).

  As shown in FIG. 2, the second pedestal 20 has a protruding end portion 66, and an L-shaped frame 68 having a substantially L-shaped cross section is connected to the protruding end portion 66 via a bolt 69. The L-shaped frame 68 that functions as a blocking member for blocking the cap unit 7 abuts against the outer wall of the cap unit 7.

  In the third pedestal 22, a third curved surface 70 having a shape corresponding to the shape of the third inner peripheral wall S <b> 3 in the second through hole 3 on the main body 6 side is provided at the end portion on the side close to the second pedestal 20. A positioning portion 72 is formed to protrude. The main body portion 6 is positioned and fixed by the third positioning portion 72.

  The second positioning member 62 and the third positioning portion 72 are provided with concave portions 74 and 76 at positions facing each other (see FIG. 3), and the concave portions 74 and 76 have coils as elastic members. A spring 78 is inserted. Since the second positioning member 62 can be displaced together with the second engaging member 46, and the third positioning portion 72 is positioned and fixed integrally with the third pedestal 22, the coil spring 78 has the second positioning member 62. Is always bullet-biased in a direction away from the third positioning portion 72.

  The coupling device 100 (see FIG. 1) includes a first base plate 106 in which the guide rails 102a and 102b or the guide rails 104a and 104b are respectively installed on the upper end surface and adjacent to each other in addition to the positioning device 10 configured as described above. And the second base 108, and the alignment device 10 is displaceable on the guide rails 102a and 102b of the first base 106 via the sliding contact plate 11 attached to the lower end surface of the base 12. It is placed. That is, the guide rails 102 a and 102 b are inserted into the long grooves of the sliding contact plate 11 so as to be slidable.

  A displacement cylinder 110 is installed on the upper end surface of the first base 106 and a gate-like gantry 112 is erected. Among these, the tip of the rod 114 of the displacement cylinder 110 is the second cylinder in the base 12. 56 is connected to the rod connecting plate 23 fitted to the end face on the side where the 56 is installed.

  Further, in the gate-shaped gantry 112, the horizontal portion extending in the direction orthogonal to the longitudinal direction of the first base 106 has an end face facing the alignment device 10 side, and the width position is regulated via the interposition plate 116 and the bracket 118. A cylinder 120 is installed. Support plates 124, 124 are connected to rods 122, which can be moved forward and backward on each side surface of the width position regulating cylinder 120. The side surfaces of the support plates 124, 124 are connected to the gate-shaped gantry 112 side. Arm members 126, 126 extending in the direction are attached. In addition, the buffer members 128 and 128 are joined to the front-end | tip part of each arm member 126 and 126 at the mutually opposing surface (refer FIG.5 and FIG.6).

  On the guide rails 104a and 104b (see FIG. 1) of the second base 108, mounts 130a and 130b are placed so as to be displaceable. Holding members 132 and 132 are installed on the lower end surfaces of the mounts 130a and 130b. The guide rails 104a and 104b are inserted into grooves formed on the lower end surfaces of the holding members 132 and 132.

  L-shaped stays 134 and 134 are attached to the gantry 130a and 130b, and nut runners 136a and 136b are supported on the L-shaped stays 134 and 134, respectively.

  As shown in FIGS. 5 and 6, the nut runner 136 a or the nut runner 136 b has a main shaft 138 that can rotate, and a socket 140 disposed at the tip of the main shaft. A bolt (not shown) for connecting the cap portion 7 is inserted.

  A substantially inverted U-shaped pin insertion board 142 (see FIG. 1) is installed on the upper end surface of the second base 108, and the pin insertion board 142 is provided with a retaining plate 146 by pins 144, 144. 146 is connected. Each pin 144 is inserted into a pin insertion hole 148 formed in the pin insertion board 142 (see FIG. 5).

  The connecting device 100 including the alignment device 10 according to the present embodiment is basically configured as described above, and the operation thereof will be described next.

  When aligning the main body 6 and the cap 7, the rod 34 of the first cylinder 32 is moved backward in advance and the rod 58 of the second cylinder 56 is moved forward. As the rod 58 of the second cylinder 56 moves forward, the second engagement member 46 connected to the displacement plate 50 is displaced toward the first cylinder 32 while being guided by the guide rail 14. Following this, the second positioning member 62 is displaced toward the third positioning portion 72, and the coil spring 78 bridged by the second positioning member 62 and the third positioning portion 72 is contracted.

  First, the small end 4 of the main body 6 is placed on the first pedestal 18, and the large end 5 is placed on the third pedestal 22. On the other hand, the cap part 7 is placed on the second pedestal 20.

  Next, the first cylinder 32 is energized. As a result, the rod 34 moves forward, and as a result, the first engaging member 24 is displaced toward the second cylinder 56 while being guided by the guide rail 14 via the pressing plate 30, the connecting plate 28 and the flat plate 26. . Accordingly, the first positioning member 40 erected on the flat plate 26 via the two spacers 36 and 38 is displaced toward the second cylinder 56 in the first through hole 2.

  The curved surface 44 of the displaced first positioning member 40 abuts on the first inner peripheral wall S1 of the first through hole 2. When the first positioning member 40 is further displaced by further forward movement of the rod 34, the main body portion 6 is pressed by the first positioning member 40 and moves forward toward the second cylinder 56 side.

  In this case, since the curved surface 44 of the first positioning member 40 is provided in a shape corresponding to the shape of the first inner peripheral wall S1 of the first through hole 2, the main body 6 is moved when the main body 6 moves forward. Oscillation around the first through hole 2 as a rotation center is remarkably suppressed.

  The third inner peripheral wall S3 of the second through hole 3 in the main body portion 6 that moves forward finally comes into contact with the third positioning portion 72 of the third pedestal 22. Since the third positioning portion 72, that is, the third pedestal 22 is positioned and fixed to the columnar members 16 a and 16 b, the main body portion 6 is blocked by the third positioning portion 72. Thereby, the further advance of the main-body part 6 is blocked | prevented.

  Here, as described above, the curved surface 70 of the third positioning portion 72 is provided in a shape corresponding to the shape of the third inner peripheral wall S3 of the second through hole 3. For this reason, even when the main body portion 6 moves forward with the first through hole 2 as the rotation center, the third inner peripheral wall S3 of the second through hole 3 is the curved surface 70 of the third positioning portion 72. As a result, the main body 6 is returned to the position before the rocking occurs.

  The main body 6 is positioned by the above operation.

  Next, the rod 58 is moved backward by energizing the second cylinder 56. Accordingly, the rod 58 is separated from the head of the bolt 54, and the second engagement member 46 is released from the pressing force of the second cylinder 56. For this reason, when the coil spring 78 expands due to elastic restoration, the second positioning member 62 is displaced in a direction away from the third positioning portion 72.

  The displaced curved surface 64 of the second positioning member 62 presses the second inner peripheral wall S <b> 2 in the second through hole 3 of the cap portion 7. As a result, the cap portion 7 is displaced in a direction away from the main body portion 6, and finally is blocked by the L-shaped frame 68.

  At the time of this displacement, since the shape of the curved surface 64 corresponds to the shape of the second inner peripheral wall S2, the swinging of the cap portion 7 around the second through hole 3 is suppressed. For this reason, the fracture surface of the cap part 7 blocked by the L-shaped frame 68 is located on the same straight line that faces the fracture surface of the main body part 6. That is, the main body 6 and the cap 7 are aligned with high accuracy.

  In this state, the rod 114 of the displacement cylinder 110 moves forward. Since the rod 114 is connected to the rod connecting plate 23 as described above, the alignment device 10 is displaced toward the gate-shaped gantry 112 while being guided by the guide rails 102a and 102b.

  When the rod 114 of the displacement cylinder 110 is positioned at the forward end, the positions of the side surfaces of the large end portion 5 and the cap portion 7 and the buffer members 128, 128 attached to the inner side surfaces of the arm members 126, 126 are as follows. It almost matches. Thereafter, the rods 122 on the side surfaces of the width position regulating cylinder 120 operate so as to approach each other, whereby the positions of the side surfaces of the large end portion 5 and the cap portion 7 are defined by the arm members 126, 126, and as a result. Further, the accuracy of alignment between the large end portion 5 and the cap portion 7 is further improved.

  During the above operation, the bases 130a and 130b are guided by the guide rails 104a and 104b of the second base 108, and the positions of the sockets 140 and 140 of the nut runners 136a and 136b match the positions of the bolt holes 8 and 8, respectively. Displace up to. At this time, the end portion of the gantry is held by the holding plate 146, so that the nut runners 136a and 136b supported by the L-shaped stays 134 and 134 can be surely extended in the horizontal direction without being inclined. Exists.

  When the above-described movement of the base 12 and thus the connecting rod 1 by the displacement cylinder 110 and the alignment of the large end portion 5 and the cap portion 7 are completed, one end portion of the bolt inserted in the sockets 140 and 140 in advance. Are inserted into the bolt holes 8 and 8, respectively.

  In this state, when the nut runners 136a and 136b are energized and the bolts are screwed together with the socket 140 following the rotational movement of the main shafts 138 and 138, the screw portions of the bolts are screwed into the screw portions of the bolt holes 8. As a result, the main body portion 6 and the cap portion 7 are connected to each other without causing positional displacement.

  Thus, according to the present embodiment, the main body portion 6 is positioned by the first positioning member 40 and the third positioning portion 72, while the cap portion 7 is positioned by the second positioning member 62. And each of the 1st positioning member 40, the 2nd positioning member 62, and the 3rd positioning part 72 is the 1st inner peripheral wall S1 of the 1st through-hole 2, and the 2nd through-hole 3 divided | segmented into the main-body part 6 side. Corresponds to the shape of the second inner peripheral wall S2, the second inner peripheral wall S2 of the second through hole 3 divided on the cap part 7 side, and the third inner peripheral wall S3 of the second through hole 3 divided on the main body part 6 side. Since the curved surfaces 44, 64, and 70 are formed, the swinging of the main body portion 6 and the cap portion 7 is suppressed.

  Therefore, the fracture surface of the main body portion 6 and the fracture surface of the cap portion 7 face each other on the same straight line. In other words, the main body 6 and the cap 7 are aligned with high accuracy. For this reason, since it becomes easy to connect the main-body part 6 and the cap part 7 and produce the connecting rod 1, the connecting rod 1 can be produced efficiently. Further, the manufacturing yield of the connecting rod 1 is improved.

  Further, in this case, since the clearance is provided between the first pedestal 18 and the third pedestal 22, the lubricating oil is supplied to the guide rail 14 while the alignment device 10 is used as described above. When performing maintenance work such as, an oiling device can be inserted through the clearance. That is, maintenance work can be easily performed. Further, there is an advantage that it is possible to avoid an increase in the weight of the alignment device 10.

  In the above-described embodiment, the first pedestal 18 and the third pedestal 22 are separate members, but they may be the same member. That is, a first base that is longer than the first base 18 may be provided, and the small end 4 and the large end 5 of the main body 6 may be placed on the first base. In this case, for example, the third positioning member may be a separate member from the first pedestal and may be erected on the first pedestal.

It is a general | schematic whole perspective view of the connection apparatus with which the aligning apparatus for connecting rods concerning this Embodiment was integrated. It is a principal part schematic perspective view of the positioning apparatus for connecting rods in FIG. It is a partial cross section side view of the positioning apparatus for connecting rods of FIG. FIG. 3 is a top plan view of the connecting rod positioning device of FIG. 2. It is a partial cross section side view of the coupling device of FIG. It is a top arrow top view of the connection apparatus of FIG. It is a schematic whole perspective view of the connecting rod after being fractured. It is a schematic whole perspective view of the connecting rod before being broken.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Connecting rod (connecting rod) 2 ... 1st through-hole 3 ... 2nd through-hole 4 ... Small end part 5 ... Large end part 6 ... Main-body part 7 ... Cap part 8 ... Bolt hole 10 ... Positioning apparatus for connecting rods 12 ... Bases 14, 102a, 102b, 104a, 104b ... Guide rail 18 ... First seat 20 ... Second seat 22 ... Third seat 23 ... Rod connecting plate 32 ... First cylinder 34, 58, 114, 122 ... Rod 40 ... first positioning member 44, 64, 70 ... curved surface 56 ... second cylinder 62 ... second positioning member 68 ... L-shaped frame 72 ... third positioning portion 78 ... coil spring 100 ... connecting device 110 ... displacement cylinder 112 ... Gate-like frame 120 ... Width position regulating cylinder 126 ... Arm members 136a, 136b ... Nutrunner 140 ... Socket 146 ... Pressing S1 ... first inner cylindrical wall S2 ... second inner wall S3 ... third inner circumferential wall

Claims (4)

A main body portion in which a first through hole is formed at a tip portion of the shaft portion and a part of a second through hole is formed at the other end portion of the shaft portion; and a cap portion having a remaining portion of the second through hole; A connecting rod alignment device that aligns the main body and the cap when providing a connecting rod having the first through hole and the second through hole,
The base,
A first pedestal on which the main body is placed;
A second pedestal on which the cap portion is placed;
A first positioning portion that protrudes from the through hole of the first pedestal and contacts the first inner peripheral wall of the first through hole;
A second positioning part that contacts the second inner peripheral wall of the second through hole divided on the cap part side;
A third positioning portion that contacts the third inner peripheral wall of the second through hole divided on the main body portion side and stops the advancement toward the cap portion of the main body portion;
An elastic member that elastically biases the second positioning portion in a direction away from the third positioning portion;
A guide member laid on the base for guiding the first positioning portion and the second positioning portion;
A first displacement mechanism capable of displacing the first positioning portion;
A second displacement mechanism capable of displacing the second positioning portion;
A damming member for damming the cap portion displaced by the elastic member being elastically biased and displacing the second positioning portion in a direction away from the third positioning portion;
A connecting rod positioning apparatus comprising:   2. The apparatus according to claim 1, wherein the first pedestal has a third pedestal on which a tip portion of the main body portion provided with the first through hole is provided and at which the third positioning portion is provided. The positioning device for a connecting rod, wherein the third pedestal mounts the other end of the main body.   3. The device according to claim 1, wherein each of the first positioning portion, the second positioning portion, and the third positioning portion is divided into a first inner peripheral wall of the first through hole and the cap portion side. The first inner peripheral wall through the second inner peripheral wall of the second through hole and the curved surface having a shape corresponding to the shape of the third inner peripheral wall of the second through hole divided on the main body side, A connecting rod aligning device, wherein the aligning device is in contact with the second inner peripheral wall and the third inner peripheral wall. 4. The connecting rod according to claim 1, wherein the elastic member suppresses the swinging of the cap portion and causes the cap portion to abut against the damming member. 5. Alignment device.

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