JPS62140730A - Simultaneous clamping device for connecting rod of devided type - Google Patents

Abstract

PURPOSE:To perform clamping operation surely and quickly by installing a means to clamp while a single drive motive is allowed to press the mating surfaces of a rod part and a cap part of a divided type connecting rod without causing separation. CONSTITUTION:When a connecting rod W is located, a cylinder rod 34 of a clamping device 30 sinks to cause sinking of a clamp arm 31, and the major end part W6 and minor end part W7 of the connecting rod are pressed from above and fixed. The minor end part W7 of the connecting rod is pressed by a pushing member of said clamping arm 31 and fixed through the agency of a spring and a spring receptacle. The mating surfaces Wdelta3 of a cap part W1 and a rod part W2 never separate and are pressed by a clamp piece 3 always in the condition in close contact. Thereafter the clamp piece 3 is situated in parallel with the connecting rod end face W5, and the downward pushing force applied to the clamp arm 31 is evenly transmitted to the major end part W6 of the connecting rod, and now clamping of the same is completed.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a type 1 connecting rod that transmits the reciprocating motion of a piston to a crank etc., which is divided into a rod portion and a cap portion. When simultaneously machining a pair of connecting holes in both the rod and cap parts, the mating surfaces should be brought into close contact and the axes of the rod part and cap part should be aligned and positioned. This invention relates to a simultaneous clamping device for a split connecting rod, which can accurately clamp a large end portion having a cap mating surface.

(Prior art) In general, a connecting rod has a small end that is connected at one end to a piston via a piston pin, a large end that is connected to a crank pin, etc. at the other end, and an arm that connects the large and small ends. It should be manufactured as one piece, but for reasons such as assembly, a part of the large end is divided into a cap part, and it is made up of two parts: the so-called cap part and the remaining rod part. It is a split type. Therefore, when holding a crank bottle or the like by aligning the large ends of the cap part and the rod part, it is necessary to drill a pair of coupling holes in each and connect them with bolts or the like. Here, it is preferable to drill this joint hole in the cap part and the rod part in one piece in order to improve the insertion of the connecting bolt etc. and to improve the machining accuracy. After aligning the mating surfaces of the caps and aligning their axes, position the large end,
It was necessary to clamp the small end, and especially the large end having a cap mating surface had to be clamped accurately so that the mating surface did not separate.

Conventionally, there has been equipment that clamps the large and small ends of connecting rods using separate devices, but this is intended for integrated connecting rods that do not have dividing surfaces.

It could not be applied to a case where the large end has a dividing surface as in the present invention. Therefore, there is no suitable clamping device for split-type connecting rods, and the only devices available are those that simply press the large end of the connecting rod and clamp it based on the prior art.

(Problems to be Solved by the Invention) In the prior art 1-, the cap part and rod part of the large end of the split connecting rod cannot be clamped by evenly pressing the cap part and the rod part at the large end when clamping, so their mating surfaces are spaced apart. It was not possible to accurately drill holes in the connecting part. Therefore, in many cases, the rod portion and the cap portion are positioned and clamped separately to perform the drilling process, which is time consuming and extremely difficult to improve the accuracy of the hole drilling process when the rod portion and the cap portion are integrated.

The present invention was made to solve the above-mentioned problems, and its purpose is to provide a simple method! ! An object of the present invention is to provide a simultaneous clamping device for a split connecting rod that quickly and reliably clamps the large end of the split connecting rod and does not separate the mating surfaces of the rod part and the cap part.

(Means for Solving the Problems) A means for solving the above problems relates to a split type connecting rod in which a part of the large end is divided as a cap part and the rest including the small end is a loft part. , align the cap part and the rod part, position them on the horizontal reference seat with one of their parallel ends facing down, and then lower the clamp arm from one side to clamp the large and small ends of the split connecting rod at the same time. The clamp mechanism at the large end of the device includes a support rod that is slidably inserted through the clamp arm downwardly, is biased upwardly by a spring member provided on the clamp arm, and has an enlarged portion downwardly; A pressing pawl that loosely fits into the support rod and is arranged between the enlarged part and the clamp arm, is swingable downwardly around the support rod, and presses the cap part and rod part of the large end of the connecting rod at the lower part. a clamp piece whose rod side is pressed downward by a pressing spring provided on the clamp arm, and a support member disposed at the -L portion of the clamp piece and disposed at the lower part of the clamp arm. Ff! engages with the spherical surface, and along the spherical surface as the clamp piece swings, Ff! The present invention has a split connecting rod simultaneous clamping device characterized by comprising a movable sphere.

(Operation by the above means) The basic operation is to place the rod part and cap part of the split type connecting rod with one of their parallel ends facing down, and to do the following: f
Place the rod part and gear 1 on several seats. After the connecting rods are brought into close contact with each other and their axes are aligned and positioned, the clamp arm is lowered from the L direction and the large and small ends of the connecting rod are simultaneously pressed and clamped.

Here, since the connecting rod big end has the above-mentioned mating surface, it is clamped particularly according to the following procedure so that the mating surface does not separate.

The clamp piece, the sphere, and the support member are held between the enlarged part of the support rod and the clamp arm, and are compressed and supported by the panel member. If the clamp piece is not in contact with the connecting rod, the rod side of the clamp piece is pressed downward by the pressing spring, so the rod side is lowered and conversely the cap side is raised, making it diagonal. As the clamp piece moves, the upper sphere also slightly slides and rotates on its spherical surface between it and the support member toward the rod part.

When the clamp arm descends to the large end of the connecting rod in this state, the pressing claw of the clamp piece that descends diagonally toward the rod comes into contact with the rod, and then the clamp
As the bar arm is lowered, the pressing claw on the rod side slightly slides on the rod part 1-, and some of the spheres slide along the spherical surface toward the cap side, pressing the clamp piece with the elastic force of the spring. In contrast, try to position it horizontally. Thereafter, when the clamp arm is further lowered, the pressing claw on the cap side of the clamp piece presses the cap part almost horizontally or slightly toward the σ end part side due to inertia due to the rotation of the clamp arm. Therefore, the rod portion and the cap portion are always pressed against the clamp piece in a close contact state.

After that, the clamp piece is connected to the connecting rod axis,! l: +
The downward pressing force applied to the clamp arm is evenly applied to the connecting rod big end to complete clamping of the connecting rod big end.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the figure (enemy) indicates a connecting rod, and its cap part (Wl) and rod part (-?) also have a connecting hole (W4).
), (W4) are almost finished in the product shape, and the connecting rod big end (2) is the cap part (W +).
and the rond part (W?) are almost aligned at their mating surfaces (W3) in a direction almost perpendicular to the connecting rod axis, and then place the jig stand (41
) is placed with one of its parallel end surfaces (W, ), (W5) facing downward, and the large end rwe) is divided into side surfaces. The line is horizontal J
, (overlay reference block (48) fixed to mold thickness (42)
). On the other hand, the small end of the connecting rod (
W7) is a horizontal hole fixed to the jig stand (41) via the collet support stand (44), (large end haze on the mold thickness (43)
) is placed with the same end surface (-5) facing down, and
The hole at the small end (Wr) is a collet support f? that protrudes into the horizontal reference seat (43). It is inserted into the cholera h (45) which is partially fitted and supported by the conical L portion of (44). Also, in the holes of the collet (45) 1 and the collet support base (44), a bush loft (46) having a tapered portion (48a) whose end widens in an inverted conical shape on one side is slidable downward. It is inserted into. In this state, the connecting rod small end (1'h) lowers the bushing rod (46), and its taper part (46a) expands the collet (45), positions and fixes it, and connects the cap part (rear end) with the rod. The connecting rod big end (We) which has a mating surface (Wt) of the part (1'h) is connected to the head of the cap part (W +) by the cap pressing rod (47), and the mating surface (W3) of the part (1'h) is
At the same time, the side surface of the large end (We) of the stove 2 is pressed to 1111 by a pressing arm (not shown).
The last reference professional was pressed toward the second position (48) and positioned by aligning the axes of the cap part (Wl) and the rod part.

A clamp device (30) for fixing the positioned stove top (W) is placed on the left side of the stove top positioning device (40) in FIG.
+11v of W); long clamp arm (31) in direction A
The large end (We) and small end (7) of the connecting rod are to be fixed. The clamp arm (31) is attached to the base (3
One end is rotatably supported by a support bin (34a) provided at the bottom of the cylinder rod (34) of the cylinder (33) fixed to the 2Ll2, and a swinging member (35)
The swinging member (35) is pivotally supported by a swinging pin (35a) at the bottom, and the swinging member (35) is attached to a bottle (32a) fixed to a base (32).
It is rotatably supported.

l! When the shilling rod (34) descends, the outside of the clamp arm (31) in FIG. Make sure that the right part of the clamp arm (31) avoids the stove top positioning device (40).
It will look like the two dotted broken lines in 1m. When the cylinder port (34) is lowered as shown by the solid line in the figure, the clamp arm (31) moves in the opposite direction and the connecting rod big end Fff
i (-〇) and the small end M (W?) are pressed and clamped.

In addition, at the right end of the clamp arm (31) in FIG. 1 at the position where the connecting rod small end (W7) is pressed, an idle rod (21) that extends downward is inserted vertically into the clamp arm (31), and the connecting rod is inserted into the clamp arm (31) vertically. (21) etc. is supported by the clamp arm (31), and its lower part is inserted into a hole in the center of a pressing member (22) that presses the connecting rod small end (III7) with its lower surface. 1i of the pressing member (22)
The hole j has a large diameter hole (22a) at the bottom and a small diameter hole (22b) at the top, passes through the pressing member (22) vertically, and the kite rod (21) passes through the small diameter hole (22b). )
is inserted into the large diameter hole (22a) with a play, and a pressing member (22) formed at the lower end of the guide rod (21) is inserted into the large diameter hole (22a).
The enlarged part (21a) for fall prevention 11- of the connecting rod (
The enlarged portion (21a) is arranged so that the enlarged portion (21a) is completely hidden in the large-diameter hole (22a) when pressing ll17).
The guide rod (21) has a large diameter hole (22a) in the axial direction.
It is made smaller than the depth of the Clamp arm (3
1) and the pressing member (22).
A spring member (24) is disposed around the spring member (24), the upper part of which is supported in a groove at the lower part of the clamp arm (31), and the lower part of which is slidably fitted to the kite rod (21) and is connected to the pressing member (22).
) on top of the spring receiver member (23) for one night.
) is constantly exerting downward pressure. In addition, the spring receiving member (
The lower part of 23) is a convex spherical surface (22d), and a concave spherical surface (22d) is formed around the small diameter hole (22b) of the pressing member (22) to engage with this. It can swing downward -H along the spherical surface around the guide rod (21).

Here, the procedure for clamping the connecting rod small end (Wy) will be described. The clamp arm (31) is located above and the pressing member (
22) is not in contact with the connecting rod (W), the pressing member (22) is pushed downward by the spring member (24) via the spring receiving member (23), and the large diameter of the pressing member (22) The step (22c) in the hole (22a) is connected to the guide rod (2
It is in contact with the standing part (21b) of the extended part (21a) of 1). Clamp arm (3
1) is the support bin (34a) of the cylinder front (34)
When it rotates around the connecting rod small end (W7) and descends to the connecting rod small end (W7), the lower surface of the pressing member (22) on the left side in FIG. If the clamp arm (31) makes contact and further descends, the pressing member (22)
rotates clockwise in the figure along the spherical surface (22d),
The state is slightly downward to the right, and conversely, the lower surface of the pressing member (22) on the right side in the figure is the end surface (Ws) of the connecting rod small end haze 7).
Number ko = I will touch and press. After this, more class 7
When the 7' arm (31) is rotated downward, the +1 clamp arm (31) becomes completely horizontal, and the pressing member (22) also rotates counterclockwise along the spherical surface (22d). Its bottom surface is horizontal and the small end of the connecting rod (111
7), and the pressing force of the clamp arm (31) is applied via the spring member (24), spring receiving member (23) and pressing member (22) to the small end of the connecting rod. (W7) and is clamped.

Next, the large end pressing mechanism (1) for pressing and clamping the connecting rod small end (We) will be described below.

A clamp arm (31) is installed at a position facing the connecting rod big end 1 (We) at approximately the center of the clamp arm (31).
) is slidably inserted under L, has a large diameter flange part (2a) at the lower end, and a small diameter threaded part (2b) at the upper end.
) is provided. A spring receiving member (1) is attached to the threaded portion (2b) via a nut (10).
1) is tightened and fixed, its lower part is supported by the bottom part (13a) of a large diameter hole (13) formed around the support rod (2) at the upper part of the clamp arm (31), and its upper part is supported by the spring receiving member (11). ) is disposed around the support rod (2), and constantly biases the support rod (2) upwardly. The upper part of the flange part (2a) formed at the lower end of the support rod (2) is fitted with a slightly larger hole (3c) in the center of the support rod (2) with some play, as shown in FIG. Above the protrusion (3b) on the side of the 60-rod part (7) on which the approximately rectangular clamp piece (3) with protrusions (3a) and (3b) formed in the connecting rod axis direction is placed. is screwed onto the clamp arm (31), and has a hole (8a) downward in the center thereof.
A pin guide member (6) having a diameter is disposed at the bottom. In the hole (Ba) is a pressing spring whose upper part is fixed to the bottom of the upper end and whose lower part is fixed to the upper part of the pressing pin (7) which can freely slide up and down in the hole (6a). (8) is inserted, and the pressing spring (8) is connected to the rod portion (W?) of the clamp piece (3) via the pressing pin (7) marked It7.
) The side protrusion (3b) is constantly pressed downward. Further, the protrusion (3a) on the connecting rod cap part (W+) side is provided with grooves (3a-h) that pass through vertically, and the grooves (3a)
-h) A movable pin (9) fixed to the clamp arm (31) is fitted vertically inside the clamp piece (3) to prevent horizontal rotation of the clamp piece (3).

In the shallow groove formed in the upper part of the clamp piece (3), there is a slightly larger hole (4) in the center of the supporting rod (2).
d), and a convex sphere (4) with a spherical upper part is fitted, and the lower part engages with the upper part of the convex sphere (4) with a concave spherical surface, and the upper part is a clamp. arm(
31) Spherical washer (5) fitted into the groove provided on the bottom surface
) fits into the support rod (2) through its central hole. Therefore, the clamp piece (3), the convex sphere (4), and the spherical washer (5) are held between the flange portion (2a) of the support rod (2) and the lower surface of the clamp arm (31), and the spring member (
12), it is in a compressed and supported state. Also, the loft Rt at the bottom of the clamp piece (3)! The two corners on the (Wz) side are the upper pressing claws (3e).

(3e), camp part pressing claws (3d), (3d) are provided on the camp FjR (W+) side 2I4J4, and the pressing claws (3cl), (3e)...
Try to press the rod part (part 2) and cap part (part 1) of We) evenly.

That is, the clamp arm (31) is located below the connecting rod (W), and the pressing claw (3d) of the clamp piece (31)
), (3e)... are not in contact with the connecting rod, the clamp piece (3) presses the protrusion (3b) on the rod part (W2) side via the pressing pin (7) 1. Press the pressure spring (
Since it is being suppressed downward at 8), the supporting wood (2)
is inserted into the hole (3C) of the clamp piece (3) with some play, so the clamp piece (3) is inserted into the hole (3C) of the clamp piece (3).

The upper part (W2) side is lowered and, conversely, the upper part (W1) side is raised. Clamp piece (3
) The convex sphere (4) at the top is also loosely fitted into the support opening and do (2), and is fitted into the groove at the top of the clamp piece (3), so it moves in the same way as the clamp piece (3), and the spherical surface It slightly slides and rotates along the spherical surface of the washer (5) toward the rod part (W?), making the movement of the clamp piece (3) even.Also, the rod part ( The flange part (2a) of the supporting row and do (2) is tilted toward the Wz) side.
is pushed downward, and the spring member (12) elastically biasing the support rod (2) in both directions is compressed slightly downward than usual. This condition is shown in FIG.

When the clamp arm (31) descends to the connecting rod large end (We) in this state, the long upper pressing claw (3e) of the clamp piece (3) first descends diagonally toward the loft section (W2). ), (3e) is the rod part (-2) end face (
W5) and when the clamp arm (31) further descends, the upper pressing claws (3e), (3e) slide toward the small end so as to push the rod end (W5) downward. - The upper convex sphere (4) slides along the spherical surface of the spherical washer (5) toward the cap part (Wl), and the clamp piece (3) is pressed by the elastic force of the spring (8). On the contrary, I try to position it on the tree. The lever member (I2) that presses the support rod (2) in the L direction also moves to encourage the movement of the clamp piece (3). After that, when the clamp arm (31) is further lowered, , the camp part pressing claws (3d) of the clamp piece (3) hold the end face (W,) of the cap part almost horizontally, or the clamp arm (31) rotates counterclockwise in Fig. 2! Due to the inertial force caused by this, it is pushed slightly towards the small end of the connecting rod (Wl).Therefore, the cap part (buttock 1) and the rod part (w?)
The mating surface (-3) of the clamp piece (-3) is always pressed by the clamp piece (3) in a close contact state without separating.

After that, as the clamp arm (31) becomes wet, the clamp piece (3) also becomes horizontal, and the clamp arm (31) becomes horizontal.
) is applied to the spherical washer (5) and the convex sphere (4
) and the clamp piece (3) to the connecting rod big end (We).

Next, the operation of this embodiment will be described below.

The 7th dog end (rice) on the horizontal reference seat (42) is the camp part pressing rod I"(47') and the cap part (W+)
The head is pressed and the mating surface (1113) with the rod part (To)
) are in close contact with each other, and the side surface of the connecting rod large end (-〇), which is almost orthogonal to the alignment surface (W3), is pressed against the superposition reference block (48), and the cap part (W+) and rod part (reverse?) are pressed against the superposition reference block (48). ) axes are aligned and positioning is incorrect. Also, the small end of the conrod on (42)
Also in li17), the collet (45) is expanded and fixed in position.

When the connecting rod (W) is positioned, the clamping device (3)
The cylinder rod (34) of 0) is lowered, the clamp arm (31) is lowered as shown by the solid line in Figure 1, and the connecting rod large end (-〇) and small end (-7) are pressed and fixed from above. do. The connecting rod small end (Wz) is attached to the clamp arm (3
1) is pressed and fixed by a pressing member (22) provided at the right end in FIG. 2 via a spring member (24) and a spring receiving member (23). As shown in FIG. 5, the connecting rod big end (We) is a pressing claw (3e) on the side of the clamp piece (3) that slopes downward so that the right side is downward.

At (3e), the rod placement 2) side is pressed downward, and a part of the convex sphere (4) slides along the spherical surface of the spherical washer (5) to the cap (W+) Illllll. Therefore, the clamp piece (3) should not be positioned horizontally, and the cap part (W+) side should be placed between the cap part pressing claws (3d) and (3d).
) to push it almost horizontally or slightly toward the small end (end) of the connecting rod using inertia. Follower cap part (W +)
and the rod i'i'B (Wz) (W:+) are always in close contact with each other without separating from the clamp piece (3).
). After that, place the clamp piece (3) parallel to the connecting rod end surface (5), and
As shown in the figure, the downward pressing force applied to the clamp arm (31) is evenly transmitted to the connecting rod large end (We), and the clamping of the large end (-) is completed.

Thereafter, a drill (not shown) is inserted through the drill bush (not shown) to connect the connecting rod (W4).

(W4) is drilled.

(Effects of the Invention) As is clear from the above, according to the present invention, it is possible to press and clamp the mating surfaces of the cap part and the lower and lower parts of the split connecting rod without separating them using one driving source. Not only can the clamping work be performed reliably, but also a large amount of clamping can be performed, and the number of workpieces and operating costs can be kept low. In addition, since the connecting holes of the rod part and the cap part can be drilled at the same time, the machining accuracy is improved and the quality of the product can be improved.Furthermore, the equipment is simple and small.
Il, fg, equipment investment costs can also be kept low.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG.
□A cross-sectional IE view of the main parts of the Type 1 connecting rod including the simultaneous clamping device and positioning device, Figure 2 is an enlarged view showing the clamping mechanism of the clamp arm, Figure 3 is a cross-sectional view of Figure 2,
Figure 4 shows the pressure 1iF7 of the connecting rod dog end clamp mechanism.
Fig. 18 and Fig. 5 are stoves. FIG. 6 is a diagram showing just before the clamping is completed, and FIG. 6 shows the completion of the conrod clamping [Δ]. In the figure, (2) is the support rod, (2a) is the enlarged part, and (3)
is a clamp piece, (3c) is a hole, (3d) is a cap pressing claw, (3e) is a loft pressing claw, (4) is a convex sphere, (5) is a spherical washer, (7) is a pressing pin, ( 8) is the pressing spring, (12) is the spring member, (31) is the clamp arm, (42), (43) is the seat for the water-1i base, (W) is the connecting rod, (-1) is the camp part, (enemy) is ro'T: part, (
W5) is the parallel end surface of the connecting rod, (We) is the large end of the connecting rod, and (Wz) is the small end of the connecting rod. Patent Applicant Honda Motor Co., Ltd. Agent Patent Attorney 2 1) Yong-Quick Inquiry Patent Attorney
Kuni Ohashi Department Patent Attorney
Udo Koyama Patent Attorney No 1)
Shigeru Figure 6 Figure 5 Manual Overwritten (Voluntary) 1986/G/2/2 Name of invention Simultaneous clamping device for split connecting rods 3, person making the amendment 4, agent 5 Date of amendment order spontaneous

Claims (1)

[Claims] Regarding a split type connecting rod in which a part of the large end is divided as a cap part and the rest including the small end part is a rod part, the cap part and the rod part are brought together and horizontally with one of the parallel end faces facing down. In the clamping mechanism of the large end of a device that is positioned on the reference seat and lowers the clamp arm from above to simultaneously clamp the large and small ends of a split connecting rod,
The clamp arm is inserted into the clamp arm so as to be slidable up and down, and is elastically biased upward by a spring member provided on the clamp arm,
A support rod having an enlarged portion on the lower side, a supporting rod that is loosely fitted onto the support rod and disposed between the enlarged portion and the clamp arm, is swingable up and down about the support rod, and has a large end of the connecting rod at the bottom. A clamp piece that forms a pressing claw that presses the cap part and the rod part, and whose rod part side is pressed downward by a pressing spring provided on the clamp arm, and a clamp arm that is disposed on the upper part of the clamp piece. 1. A simultaneous clamping device for a split connecting rod, comprising a spherical body that engages with a support member disposed at a lower portion on a spherical surface and slides along the spherical surface as the clamp piece swings.