JPH0715704Y2 - Bearing cap assembly device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a bearing cap assembling device for assembling a bearing cap to a cylinder block of an engine by press fitting, and more particularly to an improved press fitting mechanism.

[Prior art]

Recently, in an automobile engine assembly line, each of the predetermined parts is assembled on each stage while conveying the inverted cylinder block on a pallet, etc., but the crankshaft is assembled on the bearing cap assembly stage. In the case of a four-cylinder engine, for example, five bearing caps are attached to the existing cylinder block. These bearing caps are generally assembled by press fitting into the cylinder block from the viewpoint of ensuring assembly accuracy.

As an assembling device for assembling the bearing cap to the cylinder block, various structures are adopted, but normally, a device in which a cap supply mechanism, a cap holding transfer mechanism, and a press-fitting mechanism are separately arranged in parallel is used. Has been. This is because it is difficult to combine these multiple mechanisms in a complex manner.
For example, Japanese Patent Laid-Open No. 56-134140 discloses a bearing cap automatic tacking device in which the above-mentioned three types of independent mechanisms are arranged in parallel.

[Problems to be solved by the device]

By the way, when the bearing cap holding and transporting mechanism and the press-fitting mechanism are combined to simplify the assembling apparatus as a whole and the number of steps for performing each work is reduced to make the assembling apparatus highly efficient, the assembling apparatus is required. Needs to be mounted on a movable movable frame to transfer the cap, but if the movable frame is provided with a press-fitting mechanism, the reaction force of the press-fit must be received by the movable frame, so the movable frame is large. As a result, the overall size of the device, such as the drive device that moves the movable frame and the fixed-side frame that supports the movable frame, becomes large, and the durability of each part of the device also decreases, which is also disadvantageous in terms of speeding up assembly work. Is.

On the other hand, it is possible to receive the press-fitting reaction force with the fixed-side frame instead of the movable underframe, but the press-fitting mechanism moves together with the movable underframe and the press-fitting stroke is about
Since it is as small as about 5 mm, it makes contact with multiple press-fitting heads and multiple caps on the cylinder block side, or contact with multiple press-fitting heads and the pressure input acting member of the press-fitting drive device, or fixing with the reaction force transmission part of the press-fitting mechanism. There is a problem in that it is extremely difficult to configure so that the contact with the reaction force supporting portion on the frame side is completely performed.

An object of the present invention is to provide a bearing cap assembling device in which a holding unit for holding a bearing cap and a press-fitting mechanism are provided on a common movable member, and a press-fitting reaction force can be supported by a fixed frame. .

[Means for Solving the Problems]

The bearing cap assembling device according to the present invention comprises a frame and a holding unit that is supported by the frame so as to be horizontally movable at least in a predetermined direction and holds a plurality of bearing caps at the same time. A bearing cap assembling device for assembling, wherein a support member is elastically supported by a movable member that supports the holding unit on a frame, and a plurality of pressing members that abut against the bearing caps held by the holding unit are provided on the support plate. A pressing drive mechanism that elastically supports and presses and drives the pressing member is provided on the support plate, and a receiving metal fitting for transmitting a reaction force at the time of pressing drive is provided on the supporting plate, and the receiving metal fitting is pressed when the pressing drive mechanism drives. A reaction force support member that abuts and receives the reaction force is installed in a portion of the frame that corresponds to the vicinity of the pressing member when the bearing cap is press-fitted. It is characterized in that the.

[Action]

In the bearing cap assembling apparatus according to the present invention, the movable member movable with respect to the fixed frame is provided with the holding unit for simultaneously holding a plurality of bearing caps, and the supporting plate is elastically supported by the movable member. A pressing member for press-fitting and a pressing drive mechanism are provided on the support plate, and the press-fitting reaction force when the bearing cap is press-fitted by pressing the pressing member by the pressing drive mechanism is provided to the frame through the receiving metal. Since it is configured to be received by the member, the supporting plate and the movable member can be made smaller and lighter, and as a result, the assembling apparatus can be made lighter and faster as a whole.

Further, since the support plate is elastically supported by the movable member, and the pressing member is elastically supported by the support plate, it is possible to ensure that the pressing member and the bearing cap are easily and evenly and surely held when the bearing cap is held by the holding unit. The contact can be ensured, the contact between the pressing member and the pressure input acting portion of the pressing drive mechanism can be ensured, and the contact between the receiving metal and the reaction force support member can be ensured.

[Effect of device]

According to the bearing cap assembling device of the present invention, as described above, the bearing cap assembling device has the holding unit for holding the bearing cap and the mechanism for press-fitting the bearing cap, so that the bearing cap is assembled. The number of steps from transfer to press fitting can be reduced and the assembly can be done efficiently.

Since the press-fitting reaction force when the bearing cap is press-fitted is configured to be received by the reaction force supporting member provided on the frame through the receiving metal fitting, the supporting plate and the movable member can be made small and lightweight,
As a result, the assembling apparatus can be made compact and lightweight as a whole and can be operated at high speed.

The bearing cap can be press-fitted securely without contacting the parts required for press-fitting the bearing cap without applying an unreasonable load to the assembly device, making the assembly device excellent in durability. You can do it.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

The present invention relates to a bearing cap assembling device provided in a pallet type V-type 6-cylinder engine assembly line, and more particularly, to a receiving jig on the pallet after the crankshaft is assembled to a cylinder block that is placed and conveyed on the pallet. The present invention relates to a bearing cap assembling device that chucks four bearing caps (hereinafter referred to as caps) and transfers them to a cylinder block, and then press-fits the four caps at the same time.

First, an overall outline of the assembling apparatus will be described with reference to FIGS.

As the frame 2 of the assembling apparatus 1, a gate-shaped frame 3 that straddles the pallet transfer line and a fixed girder 4 that horizontally extends rearward from the right end side column of the gate-shaped frame 3 are provided. Guide rails 5 are attached to the side surfaces respectively, and the pallet 6 stopped for assembly is positioned as shown in FIG. 1, and the cylinder block 7 has the beam of the gate-shaped frame 3 with the direction of the crankshaft 8 oriented in the left-right direction. 3a
The four caps 9 are provided on the receiving jig 10 near the rear end of the pallet 6 in a predetermined positional relationship.

A movable frame 11 is arranged above the left end of the pallet 6 from the fixed girder 4 at a position lower than the beam 3a, and the movable frame 11 moves back and forth along the two guide rails 5 of the fixed girder 4. The fixed girder 4 is freely supported in a cantilever manner, and is driven forward and backward by a predetermined stroke by a cylinder 12 on the outer rear side of the fixed girder 4.

A sleeve 14 for guiding a pair of left and right guide rods 13 is provided upright on the front end of the movable frame 11.
An elevating cylinder 15 is attached to the movable frame 11 in an inverted shape between the spaces 14.

As shown in FIGS. 2 to 4, a movable base plate 16 is fixed to the lower ends of a pair of guide rods 13 vertically movably inserted through the pair of sleeves 14 and a lifting cylinder 15 is provided. The lower end of the rod 15a is fixed to the movable base plate 16, and
Can be driven up and down via a cylinder 15 and a guide rod 13.

However, the guide rod 13 and the rod 15a are movable base plate 16
When the movable frame 11 is fixed to the rear end of the beam 3a, the movable frame 11 is located at the forward limit position, and the guide rod 13 and the cylinder 12 are located near the rear end of the beam 3a. Located above 7.

Caps for simultaneously holding the four caps 9 on the receiving jig 10 on the movable base plate 16 and setting them on the cylinder block 7, and for press-fitting the four caps 9 into the cylinder block 7 at the same time. Assembly unit 17 is installed. The cap assembly unit 17 includes a holding unit 18 that holds four caps 9 simultaneously, and a holding unit 18 that holds the four caps 9 at the same time.
It is basically configured by a press-fitting unit 19 that simultaneously press-fits the four caps 9 set in the cylinder block 17, but a part of the press-fitting unit 19 is attached to the beam 3a of the portal frame 3. ing.

The holding unit 18 will be described with reference to FIGS. 3 to 7. A movable frame 20 is disposed below the movable base plate 16, and the movable frame 20 includes a pair of front and rear rails 21 on the movable base plate 16. A cylinder 23 that is hung so as to be movable in the left-right direction with respect to the movable base plate 16 by a predetermined small distance via a bearing 22 that supports the rail 21 and the rail 21 on the movable base plate 16, and is attached to the left end of the movable base plate 16.
It can be driven to the left and right by (see FIG. 8).

The movable frame 20 includes a top plate 24, a pair of left and right side plates 25, and left and right side plates.
A bottom plate 26 extending between the lower ends of 25 is provided.

The cylinder block 7 on the pallet 6 is placed with its front side facing to the right, and a pair of front and rear clamps are provided at positions corresponding to above the left three caps 9 of the movable frame 20. Mechanisms 27 are attached to the front and rear portions of the bottom plate 26.

Each clamp mechanism 27 has a fixed arm 28 and a movable arm 29.
And a cylinder 30 for clamping. Fixed arm 28
Is provided on the lower surface of the bottom plate 26, and a pressing portion 28a for pressing the left end surface and the upper surface of the cap 9 is formed at the lower end portion thereof.
The movable arm 29 is pivotally attached to the bracket 26a of the bottom plate 26 by the pin 31, the force point portion 29a at the right end thereof is clamped downward by the rod 30a of the cylinder 30, and the action point portion 29b at the lower end of the movable arm 29 causes the right end surface of the cap 9 to move. It is designed to be pressed. Reference numeral 32 is a compression spring for clamp backup, and 33 is a spring for returning the movable arm 29 to the releasing side when releasing the clamp.

As described above, each of the three caps 9 can be clamped by the two sets of clamping mechanisms 27 (see FIG. 9).

As shown in FIG. 6, because the cap 9 is assembled with the crankshaft 8 assembled to the cylinder block 7, the right end (front side) cap 9 interferes with the counterweight 8a. Mechanism 27 cannot be applied. Therefore, a front clamp mechanism 34 is arranged above the front end of the crankshaft 8 and supported by the right end portion of the movable base plate 16.

This front clamping mechanism 34 is shown in FIG. 6, FIG. 10, and FIG.
As shown in FIG. 11, a support frame 35 hung on the movable base plate 16 so as to be movable in the left-right direction, and a vertical pin at the lower end of the support frame 35.
A pair of front and rear side arms with the middle part attached via 36
37, a clamping cylinder 38 which is mounted between the right end portions of the side arms 37 to drive both side arms 37 by horizontal swinging clamp, and a pair of front and rear portions of the support frame 35, which are attached to the right end surface of the cap 9 and above. The contact portion 35a that contacts the end surface and the movable base plate 16
A shift cylinder 39 which is attached to the lower side in the left-right direction and drives the support frame 35 to the left and right, and causes the contact portion 35a to contact the cap 9 through the cylinder 39, and then the cylinder 38 is extended and driven. This allows the pair of side arms 37 to clamp both the front and rear sides of the cap 9.

Further, it is necessary to assemble a half thrust metal 40 together with the cap 9 on both end surfaces of the leftmost (rear side) cap 9, and the cap 9 is pushed while pressing the pair of thrust metal 40 toward the cap 9. Metal holding mechanism 41 for press fitting
Is attached to the left end of the movable frame 20.

As shown in FIG. 8 and FIG. 12, the metal holding mechanism 41 includes a pair of front and rear guide sleeves 42 projectingly provided on the lower surface of the left end of the movable base plate 16 and a guide rod 43 and a spring 44 so that the metal holding mechanism 41 moves vertically. The bracket 45 is movably and elastically supported, and the metal clamp mechanism 46 attached to the central portion of the bracket 45 is provided. The metal clamp mechanism 46 includes pins 48 on the pair of front and rear mounting plates 47 of the bracket 45, respectively. The L-shaped upper arm 49 and the L-shaped lower arm 50 pivotally connected to each other are configured to be opened and closed by a cylinder 51. The metal 40 is pushed toward the cap 9 and the action point portion 50a of the lower arm 50 is formed so as to push the thrust metal 40 on the right side of the cap 9 toward the cap 9 side, and is fixed to the force point portion 49b of the upper arm 49. It is adapted to push the point portion 50b of the lower arm 50 by a rod 51a of da 51. However, since the metal clamp mechanism 46 is disposed in the middle of the front and rear clamp mechanisms 27, it does not interfere with them.

Next, the four caps 9 held by the holding unit 18 and set at each mounting portion of the cylinder block 7 are set to about 5 m.
The press-fitting unit 19 that is driven by press-fitting m to be fitted into the cylinder block 7 accurately will be described with reference to FIGS. 5, 7, and 8.

The movable base plate 16 and the top plate 24 of the movable frame 20 are formed at the central portion in the front-rear direction with an opening 52 over substantially the entire length thereof, and a support plate 53 is disposed in the opening 52, and the support plate 53 is provided. A pair of front and rear guide rods 54 are vertically erected and fixed to the right and left portions of the guide rod 54. The guide rods 54 are inserted into the sleeve 56 attached to the frame member 55 on the movable base plate 16 side, A locking brim 54a is attached to the upper end of 54, and a compression coil spring 57 is externally mounted on the guide rod 54 between the sleeve 56 and the support plate 53, whereby the support plate 53 is elastically supported by the movable base plate 16 so as to be vertically movable. ing.

A guide sleeve 58 is vertically attached and fixed to the lower surface of the support plate 53 at a position above the center of each cap 9, and a press-fitting rod 59 is vertically movably inserted through the guide sleeve 58.
A compression coil spring 60 is mounted on the press-fitting rod 59 between the flange portion 59a at the upper end of the press-fitting rod 59 and the support plate 53, whereby the press-fit rod 59 is elastically supported by the support plate 53 so as to be vertically movable. A gate-shaped press-fitting head 61 having a trapezoidal upper half is fixed to the lower end of each press-fitting rod 59 in the front-rear direction, and the upper surface of the cap 9 is pressed by a pair of front and rear head portions 61a of the press-fitting head 61. It is made possible. The upper arm 49 of the metal clamp mechanism 46 passes through the opening 61b of the press-fitting head 61.

In order to drive the four press-fitting rods 59 downward, a shaft 62 is arranged above the press-fitting rods 59, and the shaft 62 is supported by the support plate 53 by four sets of pivot brackets 63. The left end of the shaft 62 is connected to the output shaft 64a of the air-driven rotary actuator 64 and can be rotationally driven.
An eccentric shaft portion 62a is formed at a position, a ring member 66 is externally fitted to the eccentric shaft portion 62a via a needle bearing 65, and an outer peripheral surface of the ring member 66 is in contact with an upper end of the press-fitting rod 59.

Therefore, by rotating the shaft 62 by about 180 ° in a state where the eccentric shaft center of the eccentric shaft portion 62a is eccentric upward, the press-fitting rod 59 can be strongly pressed downward through the ring member 66.

Here, since the movable frame 11 is supported by the fixed girder 4 in a cantilever manner, when the reaction force of the press-fitting load is supported by the movable frame 11 via the support plate 53 and the movable base plate 16, However, the movable frame 11 and the fixed girder 4 are increased in size.

Therefore, the press-fitting unit 19 employs a configuration in which the press-fitting reaction force is supported by the beam 3a of the gate frame 3 as follows.

As shown in FIG. 5, front and rear brackets 67 are vertically attached and fixed to the lower surface of the beam 3a at a position corresponding to the upper side of each pivot bracket 63, and each bracket 67 supports a substantially L-shaped reaction force. A member 68 is rotatably pivoted at its upper end by a left-right pin 69, and a cylinder 70 for simultaneously swinging these four sets of reaction force supporting members 68 is attached downward to the central front end of the beam 3a. , Each arm portion 71a of the connecting member 71 fixed to the lower end of the rod 70a is connected to the front end of the lever portion 68a of the corresponding reaction force supporting member 68, and the reaction force supporting strut of the reaction force supporting member 68 by this cylinder 70. The portion 68b can be selectively driven between an acting position in which the portion 68b is directed vertically downward and a retracted position in which the portion 68b is swung forward about 45 ° from the acting position. Faces the vicinity of the upper end of the bracket 72 attached to the upper end of the pivot bracket 63. It has become so.

The operation of simultaneously assembling the four caps 9 to the cylinder block 7 by the bearing cap assembling apparatus 1 described above will be described.

First, the four receiving jigs 10 on the pallet 6 are shown in FIGS.
The cap 9 is prepared as shown, and the leftmost cap 9
A pair of thrust metal 40 is also prepared for. In this state, the movable frame 11 is moved backward by the cylinder 12 to position the clamp mechanism 27 above the receiving jig 10,
The movable frame is moved to the left with respect to the movable base plate 16 by 23 and the movable arm 29 is opened by the cylinder 30, and then the movable base plate 16 is lowered to a predetermined height position by the lifting cylinder 15. The fixed arm 28 and the movable arm 29 of the clamp mechanism 27 are opposed to both sides of the cap 9. At this time, the upper arm 49 and the lower arm 50 of the metal clamp mechanism 46 are opened, and their action points 49a and 50a face the center of the thrust metal 40 on both sides of the leftmost cap 9. The front clamp mechanism 34 is at the position retracted to the right.

Next, the rod 23a of the cylinder 23 is extended to move the movable base plate 16
On the other hand, the movable frame 20 is moved to the right to bring the fixed arm 28 of the clamp mechanism 27 into contact with the cap 9, and at the same time, the rod 30a of the cylinder 30 of the clamp mechanism 27 is extended to bring it into a clamped state. In parallel with this, the cylinder 51 of the metal clamp mechanism 46 is extended to drive the thrust metal 40 into the cap 9
And the support frame 35 is moved leftward by the cylinder 39 of the front clamp mechanism 34 to bring the contact portion 35a into contact with the cap 9 and the rod 38a of the cylinder 38 is extended to cause the pair of side arms 37 to move. Clamp the cap 9. As a result, the four caps 9 can be gripped and transported, but the press-fitting head 61 of the press-fitting unit 19 is also in a state of substantially contacting the upper surface of the cap 9.

Next, the movable frame 11 is moved forward while the movable base plate 16 is raised by the lifting cylinder 15, and stopped when the cap 9 is positioned above the center of the cylinder block 7, and the movable base plate 16 is lowered. , Each cap 9 to cylinder block 7
Set on each mounting part of. At this time, the reaction force support member 68 is switched to the operating position, and in this state, the actuator 64 is driven to rotate the shaft 62 by about 180 °,
As the eccentric shaft center of the eccentric shaft portion 62a moves downward, each ring member 66 presses the press-fitting rod 59 downward, and the cap 9 is press-fitted and driven by each press-fitting head 62 so that the cylinder block 7 is accurately attached to the mounting portion. It is assembled.

At the time of press-fitting, the metal clamp mechanism 41 is elastically supported.
The metal clamp mechanism moves down according to the press fit.
Since the cap 9 is press-fitted while pressing the thrust metal 40 against the cap 9 with 41, the thrust metal 40 is pushed into the cap 9
It will be assembled at a predetermined position together with the cap 9 without being displaced.

By the way, the cap 9 on the receiving jig 10 is clamped.
Eccentric shaft of shaft 62 prior to clamping at 27
When the eccentric shaft center of 62a is switched to the highest position to hold the support plate 53 low with the upper end of the press-fit rod 59 as a reference, and the movable base plate 16 is lowered to clamp the cap 9 by the clamp mechanism 27, the movable plate 16 is moved. The support plate 53 is clamped with the support plate 53 moved slightly upward relative to the base plate 16. When the cap 9 is clamped in this state and the cap 9 is set on the cylinder block 7 after transfer, since the support plate 53 is positioned low, it interferes with the bracket 72 when the reaction force support member 68 is switched to the operating position. There is nothing to do. Then, after the switching, when the shaft 62 is rotated, the support plate 53 elastically supported first moves slightly upward as the eccentric shaft center of the eccentric shaft portion 62a descends. Since the reaction force support portion 68b and the receiving metal fitting 72 contact each other, and the reaction force support member 68 thereafter supports the press-fitting reaction force, the cap 9 is press-fitted.

That is, by elastically supporting the support plate 53 on the movable base plate 16, it is ensured that the press-fitting head 61 and the upper surface of the cap 9 contact each other when the cap 9 is clamped, and the press-fitting rod 59 supports the press-fitting rod 59.
The press-fitting rod 59 and the ring member are elastically supported by 53.
The reaction force support member 68 is switched by rocking by ensuring contact with 66 and maintaining the eccentric shaft center of the eccentric shaft portion 62a at the highest position to switch the reaction force support member 68 to the operating position.
And the receiving bracket 72 are reliably prevented, and the support plate 53 is elastically supported with respect to the movable base plate 16 to ensure contact between the reaction force support member 68 and the receiving bracket 72 during press fitting drive. You can do it.

Furthermore, since the press-fitting reaction force is not supported by the support plate 53 or the movable base plate 16 but is supported by the beam 3a of the gate frame 3 via the reaction force support member 68, the support plate 53 or the movable base plate 16 is supported. The strength and rigidity of the can be kept relatively low, and the weight can be reduced.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view of a bearing cap assembling device, FIG. 2 is a left side view of the device, FIG. 3 is a front view of the device, and FIG. Front view of the holding unit and the press-fitting unit, FIG. 5 is a left side view of both units, FIG. 6 is a vertical sectional front view of the holding unit, FIG. 7 is a vertical left side view of the holding unit and the press-fitting unit, and FIG. Is a vertical sectional front view of the press-fitting unit, etc., FIG. 9 is a sectional view taken along the line IX-IX of FIG. 6, FIG. 10 is a sectional view taken along the line XX of FIG. 6, FIG. 11 is a plan view of the front clamp mechanism, and FIG. The drawing is a plan view of the metal clamp mechanism, FIG. 13 is a front view of the receiving jig, and FIG. 14 is a side view of the receiving jig. 3 ... Frame, 3a ... Beam, 4 ... Fixed girder, 7 ... Cylinder block, 9 ... Bearing cap, 11 ... Movable frame,
12 ... Cylinder, 16 ... Movable base plate, 18 ... Holding unit, 53 ...
Support plate, 59 ... Press-fit rod, 60 ... Spring, 61 ... Press-fit head,
62a ... Eccentric shaft part, 64 ... Rotary actuator, 63 ... Pivot bracket, 66 ... Ring member, 68 ... Reaction force support member, 68
b ... Reaction force support part, 72 ... Bracket.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Mitsumasa Maeda 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Co., Ltd. (72) Inventor Toyoji Fuji, 3-1, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Incorporated (56) References JP 62-246433 (JP, A) Actual 62-53922 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A bearing cap assembly for mounting a plurality of bearing caps on a cylinder block at the same time, comprising a frame and a holding unit supported by the frame so as to be horizontally movable at least in a predetermined direction and simultaneously holding a plurality of bearing caps. In the device, a supporting plate is elastically supported by a movable member that supports the holding unit on a frame, and a plurality of pressing members that come into contact with the bearing caps held by the holding unit are elastically supported by the supporting plate, A pressing drive mechanism for pressing and driving a member is provided on the support plate, and a receiving metal for transmitting a reaction force at the time of pressing drive is provided on the supporting plate. The reaction force support member that receives
A bearing cap assembling apparatus, which is provided in a portion of the frame corresponding to the vicinity of the pressing member when the bearing cap is press-fitted.