JPS6334038A - Device for installation of crank shaft - Google Patents

Abstract

PURPOSE:To mount a crank shaft without causing damage to metal bearings by arranging separately a socket, whereby a nut can be set freely on a set jig, and a nut runner on an elevating/sinking table. CONSTITUTION:A plurality of locating pins 19 are installed at the overside of an elevating/sinking table 4 and protruded, and the tip of each pin 19 is inserted in a through hole 12a in a pallet 12. Thus a set jig 11 is located. Right under said elevating/sinking table 4, a mounting table 21 is installed with capability of elevation and sinking along a rail suspended from the machine frame. At this mounting plate 21, a nut runner 22 is dangled, which includes a recess 22a capable of fitting and removal on/from a drive shaft 16a of each socket 16 of the set jig 11. A piston rod of a docking cylinder 23 mounted on the mounting plate 21 is coupled with the elevating/sinking table 4, and the plate 21 is given an elevating/sinking motion with respect to the elevating/sinking table 4 through the action of the docking cylinder 23 as well as a motion interlocked with the elevation/sinking of the elevating/sinking table 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an assembling device that automatically assembles a crankshaft to a connecting rod of a vehicle engine.

(Prior Art) In Japanese Patent Application No. 60-232346, Applicant L1 of the present application proposed a cylinder block in which a piston with a connecting rod is inserted into the upper side of the machine frame, and the connecting rod hangs down to form a set stand that can be freely positioned in the next state. , a lifting platform is provided below the machine frame for lifting and lowering a setting jig to be placed under the setting table,
The crankshaft and connecting rod cap are set in the setting jig, and as the setting jig rises, the pin part of the crankshaft comes into contact with the large end of the connecting rod, and the bolt hole of the connecting rod cap is brought into contact with the pin part of the crankshaft. We have proposed a crankshaft assembly device in which a connecting rod bolt at the large end is inserted and a nut is tightened using a nut runner mounted on the setting jig.

(Problems to be Solved by the Invention) By the way, if a nut runner is mounted on a setting jig, the setting jig tends to become complicated and large, and if a plurality of setting jigs are prepared and introduced alternately, It is necessary to provide a screwdriver/seat for each setting jig, which causes the problem that the entire device becomes expensive.

Also, since the piston and connecting rod are assembled so that there is a relatively large play in the axial direction of the piston pin, insert this into the cylinder block with the center line of the connecting rod in the hanging direction aligned with the @ line of the piston. Even if the connecting rod is installed, the connecting rod may shift in the axial direction of the piston pin when transporting the cylinder block to the assembly station. There is a risk of damaging the metal of the big end when the parts are brought into contact, and before assembling the crankshaft to the connecting rod, do not attach it to the metal attached to the big end or to the shaft support of the cylinder block. To automatically inspect the presence or absence of thrust washers attached to the inner surface of a crank arm on both sides of a journal part of a crankshaft, and to prevent forgetting to install these metals and washers. I long for it.

It is an object of the present invention to provide an apparatus that solves these problems and satisfies the above requirements.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a cylinder block in which a piston with a connecting rod is inserted into the upper side of the machine frame, and a cylinder block in which the connecting rod hangs down. A set stand that can be positioned freely with il, and 1 below the set stand on the underside of the machine frame! A lifting platform is provided for raising and lowering the setting jig, which is placed in the 11. The crankshaft and the connecting rod cap can be freely set on the setting jig. In a crankshaft assembly device in which the pin portion is brought into contact with the connecting rod cap, the connecting rod bolt at the large end is inserted into the bolt hole of the connecting rod cap, and a nut is tightened thereon. A nut runner is provided on the elevating table which can be freely moved up and down in conjunction with the socket and can be freely connected to the socket through a mounting plate that can be moved up and down with respect to the elevating table.

Further, a positioning means for positioning the connecting rod in the axial direction of the piston pin so that the center line in the hanging direction of the connecting rod matches the @ line of the piston is attached to the machine frame, and a positioning means is attached to the mating shaft support of the cylinder block. a metal detector that detects the presence or absence of a metal attached to the large end of the crankshaft; and a washer detector that detects the presence or absence of a thrust washer attached to the inner surface of the crank arm on both sides of the journal portion of the crankshaft. It is characterized by having the following.

(Function) The setting jig is simplified because the set ff3 tool is equipped with only a socket that can freely set a nut at the tip, and a nut runner that can be freely connected to the socket is installed on the lifting platform that raises and lowers the setting jig. Moreover, it can be obtained relatively compactly, and when a plurality of setting jigs are prepared, it is sufficient to prepare a nut runner for one setting jig, and the entire apparatus can be obtained at a relatively low cost.

In addition, the connecting rod is moved axially concentrically with respect to the piston pin by the positioning means, and the posture of the connecting rod is determined constant by its own weight, and the center line of the connecting rod is aligned with the titBM of the piston. Therefore, the pin part of the crankshaft can be accurately brought into contact with the large end of the connecting rod without damaging the metal.

Furthermore, metal detectors and washer detectors automatically inspect the metal of the shaft support of the cylinder block, the metal of the large end, and the presence of thrust washers on the inner surfaces of both crank arms of the crankshaft. The crankshaft cannot be assembled without a thrust washer or thrust washer.

(Example) The drawing shows that a piston 0 with a connecting rod B is inserted into each cylinder bore of a cylinder block of an in-line 4-cylinder engine, and the piston 0 with a connecting rod B is inserted and crushed in advance, and the piston 0 is transported to a predetermined assembly station and a crankshaft D is assembled. 1 to 3, (1) is a roller conveyor that conveys the cylinder block A, (2) is a nine-frame frame installed at the assembly station, and (3) is a roller conveyor that conveys the cylinder block A. A nine-set stand is installed on the upper side of the machine frame (2), and a lifting stand (4) is installed on the lower side of the machine frame (2), and the set stand (3) is installed on the machine frame (2). It is slidably attached to a vertical rail (5) so that it can be moved up and down by a cylinder (6), and as the set table (3) rises, the cylinders transported by the roller conveyor (1) The block A is supported on the work receiver (7) and lifted up from the conveyor (1) so that it can be positioned with each connecting rod B hanging down, and the lifting platform (4) is connected to the machine frame (2). It is slidably attached to the rail (3) vertically installed on the machine frame (2), and the nine-line rod (9) is attached to the elevator platform (
Insert the screw into the nut sleeve (4a) of 4) and attach the base rod (9).
The lifting platform (4) is moved up and down by a motor 00 that rotates forward and backward.

Then, the setting jig αυ inserted into the lower side of the set a (31) is raised and lowered by the movement of the lifting platform (4), and the crankshaft D and connecting rod cap B are set on the set jig (11), By raising the set table Auυ, the pin part P of the crankshaft D is brought into contact with the large end of the connecting rod B, and the connecting rod bolt F of the large core end is inserted into the bolt hole of the connecting rod cap B, and the nut is screwed into it. Be sure to tighten N.

More specifically, the setting jig (111 includes a crank shirt attached to the upper side of the pallet as shown in FIGS. 6 to 8) fits into the chamfered portion G of one end of the crankshaft D. A support A-03 that prevents rotation and supports the crankshaft A-03, and a support α-03 that supports the other end are biased upward by respective spring parts, and the crankshaft D can be freely set in these supports 0304. Further, the pallet (2) is provided with a plurality of optional sockets (G) each having a nut N set at the tip thereof, each of which is biased upwardly by a spring (17), as shown in FIG.

Attach a spring (18a) to the tip of each socket (g).
), and a connecting rod cap E is inserted into each bolt hole of the connecting rod cap E with the bottle side thereof, so that the connecting rod cap E can be positioned and held at the tip of each socket.

Further, as shown in the third factor 11111K above the lifting platform (4), a plurality of positioning pins α9 that can be freely retracted are provided above.

By protruding these positioning bin α sickles, the lifting platform (4)
The tips of the respective pins 09 can be inserted into the through holes (12, 1) of the pallet a of the set jig 01J, which is inserted from the conveyor ■ placed on the side of this, and the set jig αυ can be positioned. I hope so.

In addition, a mounting plate is attached to the machine frame (2) directly below the lifting platform (4).
Each socket (4
) drive@(16a) with a self-pressure recess (22a) at the tip.
) with a plurality of nut runners installed vertically, and the mounting plate (
The piston rod of the docking cylinder 2) installed in Nine movements are provided in conjunction with the lifting and lowering movement of the lifting platform (4).

In addition, in the illustrated example, as shown in FIGS. 4 and 5, there are horizontal and longitudinal rails (24) fixed to the mounting plate I2v.
a), and a pair of first sliders (25a) which are movable along the longitudinal direction are provided, and a first slider (25a) fixed to each first slider (25a) is provided. A plurality of 2 sliders 1 da-G are installed in 4 positions, and each of the above-mentioned nara tran naras is attached to the h transformation 2nd slider S so that movement in the horizontal direction is given to this by the movement of the 2 sliders @G. At the same time, a guide pin □□□ is erected on the 2nd slider can of each group, and when the docking cylinder is operated to the docking side, the drive shaft (16a) of each socket (to) and the respective Prior to engagement with the recess t22a) at the tip of the nut runner @, each guide pin (to) is inserted into the guide hole (lla) formed in the setting jig ctn, and the core part @@(16
a) and the recess (22a) can be reliably centered, and it is also compatible with setting jigs 0υ for different models.

In the drawing, the setting jig 01) discharging conveyor installed on the lifting platform (4), (to) the horizontal direction of each nut runner @! A stopper that restricts JJ is shown.

Further, a positioning means 4 is provided at a side position of the setting stand (3) on the upper side of the machine frame (2), and each connecting rod B hanging from the cylinder block set on the setting stand (3) is provided.
was moved toward the center in the axial direction of the piston pin, so that the center #51 of each connecting rod B in the hanging direction could also coincide with the @ edge of the piston C.

As shown in FIGS. 9 to 11, the positioning means is attached to a flexible frame Ω) which can be moved laterally and retracted along with the cylinder block A on the set table (3). It is equipped with four position 1 slave fixing tools 01) having an id groove (31a) at the tip for inserting and positioning the large end of each connecting rod B, and the movable frame (7) is connected to the machine frame ( 2) The first town council frame Q moves forward and backward with the first cylinder (32b) along the fixed rail (32a), and the second cylinder (33a) moves forward and backward with respect to the first movable frame □□□. A second movable frame 61) is attached to the second movable frame (to) so as to be movable in the crankshaft direction via each threaded bearing □□□. Positioning
Ca1l and the inner position firing tool GηC31) indicated by X and 2 are connected by each rod (9), and the Y positioning J
Attach the cylinder (L) to the tail end of D, and the piston pin (36a) of the cylinder (to) to the tail end of the positioning part (ζ4υ) of Each stopper @(b) is provided to restrict the movement of the retainer (111C31), and the movement of the first movable frame Q due to the forward movement of the first cylinder (32b) causes the firing tool 6υ to move to each position. The movement of each connecting rod B to the vicinity of the large end and the movement of the second movable frame mouth due to the movement of the second cylinder (33a) to the forward side causes The operation of the cylinder (7) allows these four positioning tools (131) to be moved between the state shown by the solid line, where the distance is relatively wide, and the state shown by the solid line, which is relatively wide. The state shown by the chain line has been changed to make it compatible with two types of cylinder blocks λ.

In addition, as shown in Figs. 12 to 14 on the machine frame (2),
A metal detector chrysanthemum is provided and installed on the metal M attached to each shaft part of the cylinder block set on the set table (3), or/and on the large end of each connecting rod B hanging from the cylinder block. The presence or absence of Nen Metal M2 can now be inspected.

To explain this in detail, in the case shown in the figure, in the machine frame (2),
As clearly shown in Fig. 12, a movable frame (goods) is provided directly below the cylinder block person set on the set tj (31), which can move forward and backward from the side, and a magnetic sensor is installed on the top surface of the movable frame (41). Five metal detectors (G) are arranged upright at intervals approximately equal to the bore pitch, and the movable frame is vertically mounted on the machine frame (2) and then slides on the rail (roller). A rodless cylinder installed on the elevating base is freely attached, and a rodless cylinder is installed on the base so that it can freely move forward and backward in the axial direction of the crankshaft D.
l Screw into the nut sleeve (43a) of the base (G),
The movable frame (4υ% to the line rod) is moved forward and backward by the motor, and the elevating base (G) moves up and down, and the rodless cylinder moves in the axial direction of the crankshaft D to move the cylinder from the retracted position. Allow the player to move forward and backward toward the block entry side.

In addition, as shown in Figs. 2, 15, and 16, a washer detection J447) is provided on the machine frame (2) to detect the inner support 1 of the journal portion J of the crankshaft D set in the setting jig. Make sure to check whether there is a thrust washer W attached to the inner surface of the crank arm.

To explain this in detail, use the washer detector shown above (
47) is attached to the tip of a slide member which is attached to the machine frame (2) in a horizontal sliding position on the machine frame (2), and is attached to the cylinder. The movement of the crankshaft D from the laterally outward retreat position toward the crankshaft D side is given by the operation of , the air discharge port (51 bar 5) for the inner surface of each thrust washer W on the inner surface of
1), and a common air inlet (52) communicating with both air outlets (51) (51) is provided at the tail end of the washer detector η. (52)
As clearly shown in FIG. 16, the air supply source (
56).

In the drawings, (57) and (57) indicate four bolt holders each moving laterally toward the cylinder block on the set table (3), and each bolt holder, ? (57) is the cylinder (
As the cylinder block AO1ll is moved forward by the forward movement of the connecting rod B, the head of the connecting rod gel F at the large end of each connecting rod B is covered from above, and this is inserted into the bolt hole of each connecting rod gear 2'E. Press the large end so that it does not come off when inserted.

(59) is a positioning member provided on a setting jig I that is inserted into the journal portion J of the crankshaft D to position the shaft D in the axial direction.

(60) is a washer presser at the tip of the positioning member (59) that presses each thrust washer W so that it does not fall off;
61) indicates a cushioning material such as rubber which is inserted into the outer periphery of the tip of each metal detector bed.

Next, to explain the operation of the embodiment, first, the roller conveyor (1) transports a shilling block with a connecting rod B attached thereto, and positions it on the set table (3) of the assembly station. Frame (6)? The rodless cylinder is moved forward to the first detection position of the I')'I leg directly below the cylinder block, that is, the position where each metal detector (G) faces each shaft support, and then the motor is moved forward. ), the movable frame t41) is raised to a predetermined position one inch before the tip of each detector chrysanthemum comes into contact with the metal Ml of each shaft support, as shown in FIG. - Inspect the presence or absence of metal M1 on each shaft support.

Next, after lowering the movable frame (9), it is moved back to the second detection position where the fourth detector 1 from the tip of the movable frame D is flush with the large end of the winter connecting rod B. Next, the motor (G) is operated to raise the movable frame 9 to a predetermined position It, as shown in FIG. Then, each detector inspects the presence or absence of metal M2 at each large end.

Next, the movable frame 4υ is lowered, and after further retreating, each positioning J4C3υ is moved to the first and second cylinders (32a) (33a
) is moved forward to the cylinder block A 9111, and according to this, the large end of each connecting rod B is inserted into the guide In<31a) of each positioning 8 Gl), and the connecting rod B is positioned at the center of the piston pin. The connecting rods B are positioned in the axial direction of the piston pin so that the posture of the connecting rods B is determined by their own weight, and the center line of each connecting rod B in the hanging direction is aligned with the axis of the piston C.

Next, each bolt holder (57) is attached to the cylinder (58) (58).
) moves forward toward the entry side of the cylinder block, and at the same time retreats each positioning tool CIIJ.

Also, put the setting jig αυ with the crankshaft D and connecting rod cap E set on the upper side of the lifting table (4), position it on the lifting table 8 (4), and then install the washer detection tool (B). The crankshaft D is moved forward by the operation of the cylinder (■), and is inserted between the crank arms on both sides of the journal part J as shown in Fig. 16, and air is ejected from both air outlets (51) (51). The presence or absence of each thrust washer W is then inspected.

In other words, if both crank arms do not have a thrust washer W on at least one of the opposing surfaces, the gap between the air discharge hole (51) of the washer detector Q7) and the - side crank arm is compared. As the target area becomes wider, the discharge decreases and is detected by the pressure switch (53).

Next, the washer detection A-Qη is retracted, and each metal M1. After completing the inspection of M2 and the positioning of the connecting rods B, the motor is activated to raise the lifting platform (4), and each pin part P of the crankshaft D is brought into contact with the large end of each connecting rod B. , insert the large end connecting rod bolt F into the bolt hole of each connecting rod cap E1.
Next, operate the docking cylinder holder to raise the mounting plate with respect to the lifting platform (4), and insert the drive 181 (16a) of each socket head into the recess (22a) of each nut runner (2).
, and operates each nut runner. According to this, each nut N is tightened to each connecting rod bolt F.

Thereafter, the elevating table (4) is lowered, the setting jig ctnt is delivered by the conveyor hand, and the cylinder block A on the setting table (3) is delivered by the roller conveyor (1) to complete the assembly work.

(Effects of the Invention) As described above, according to the present invention, it is possible to make the ninth setting jig, which separates and disposes the socket that can freely set nuts on the setting jig and the nut runner on the lifting platform, into a simple and relatively small size.
Moreover, when preparing multiple setting tables A, the foot Q device can be obtained inexpensively with one setting jig, and the crankshaft can be securely attached to the large end of the connecting rod without damaging the metal. It can be assembled, and the metal detector and washer detector can automatically check the presence of @IU branch metal, big end metal, and thrust washers, making sure that you do not forget to install these metals or thrust washers. It has a deterrent effect.

[Brief explanation of drawings]

Figure 1 is a plan view of one example of the device of the present invention, and Figure 2 is its ■-
■View from the line, Figure 3 is an enlarged view of the main parts. Fig. 4 is a view taken along the line IV-IV, and Fig. 5 is a view from ■-v.
6 is a front view of the setting jig. Figure 7 is its plan view, Figure 8 is Vllll-1 of Figure 6.
FIG. 9 is a side view of the position matching means,
Figure ICl3 is its plan view, Figure 11 is its front view, and Figure 1
Figure 2 is a side view of the metal detector, and Figure 13 is its X1tl.
-XIII line enlarged cross-sectional view, Fig. 14 is its operation diagram,
FIG. 15 is an enlarged side view of the washer detector, and FIG. 16 is a partial plan view thereof. (2)...Machine frame (3)...Set stand (
4)...Lifting platform αD...Set jig (G)...Socket (2)...Mounting plate ■...
Nut runner (G)...Positioning means ■...Metal detector Oη...Washer detection tool A...Silling block B...Connlot 0...Piston
D...Crankshaft E...Conrod cap F...Conrod bolt N...Nut W...Thrust washer M
l...Metal of shaft support, ~12...Metal of big end P...Bin part of crankshaft J...Journal part of crankshaft, K...
Crank arm Fig. 7 Fig. 6

Claims (1)

[Claims] There is a setting table on the upper side of the machine frame that can freely position the cylinder block with a piston with connecting rod inserted in it with the connecting rod hanging down, and a setting jig placed on the lower side of the setting table on the lower side of the machine frame. A lifting platform that goes up and down is provided, the crankshaft and the connecting rod cap can be freely set on the setting jig, and the pin portion of the crankshaft is brought into contact with the large end of the connecting rod by raising the setting jig. , in a crankshaft assembly device in which the large end connecting rod bolt is inserted into the bolt hole of the connecting rod cap and a nut is tightened thereon, the setting jig has a socket at the tip that can freely set the nut. At the same time, a nut runner is provided on the elevating platform, which is movable up and down in conjunction with the elevating platform, and is connectable to the socket via a mounting plate that is movable up and down with respect to the elevating platform. positioning means for positioning the connecting rod in the axial direction of the piston pin so that the center line of the connecting rod in the hanging direction coincides with the axial line of the piston; A crank characterized by being provided with a metal detector for detecting the presence or absence of attached metal, and a washer detection tool for detecting the presence or absence of thrust washers attached to the inner surface of the crank arm on both sides of the journal portion of the crankshaft. Shaft assembly device.