JPH05138456A - Device for assembling two parts - Google Patents

Abstract

PURPOSE:To shorten the working time and reduce the working space by performing, e.g. the position index of each ring gear and differential case of a differential device and the assembling to each other with one equipment. CONSTITUTION:An index base 50 is provided in a base 40, which is operated freely to move between an assembling position, where a ring gear is set, and a taking position of a differential case W2 and operated freely to elevate, freely to move and elevate with the base 40 and freely to reciprocate. The base 40 is also provided with a clamp mechanism for clamping the differential case W2, and the index base 50 is provided with a center pin 58 for centering the differential case W2 and index pins 60, 68 to be inserted into bolt holes W1a, W2a of the ring gear and the differential case W2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling apparatus for mutually assembling two parts such as a case of a vehicle differential device and a ring gear fixed to the outer periphery thereof.

[0002]

2. Description of the Related Art FIG. 6 is a sectional view showing a differential case (hereinafter referred to as "differential case") W2 with a ring gear W1 fixed, and FIG. 7 is a plan view thereof. As is apparent from these drawings, the ring gear W1 is press-fitted onto the outer periphery of the differential case W2, and the flange portion of the differential case W2 and the ring gear W1 are coupled by a plurality of bolts 90. Therefore, when these are assembled, the bolt hole (screw hole) W1a of the ring gear W1 is
It is necessary to match the bolt hole (insertion hole) W2a of the differential case W2.

Therefore, when assembling the ring gear W1 and the differential case W2, the position of the ring gear W1 is first indexed in the first step, and then the differential case W is used in the second step.
The position 2 is indexed, the ring gear W1 and the differential case W2 are assembled in the third step, and the mutual bolt holes W1
a and W2a are aligned. And each of these processes is performed manually by the operator.

[0004]

The indexing work is performed by the ring gear W1 and the differential case W2 which are the objects of the indexing work.
It is required to rotate or position them accurately. Therefore, it takes time to perform the work, and it is necessary to secure a work space for individually indexing the ring gear W1 and the differential case W2.

The technical problem to be solved by the present invention is to shorten the working time and the working space by, for example, determining the positions of the ring gear and the differential case in the differential device and assembling them together in one facility. It is to plan.

In order to solve the above-mentioned problems, the two-part assembling apparatus according to the present invention is constructed as follows. That is, after the ring-shaped work preset at the predetermined assembly position and the case-like work inserted in the work in the centered state are circumferentially phase-positioned, the bolt holes for mutual connection are formed. A two-part assembling device for assembling in a matched state, wherein the base is configured to be movable between the assembling position and a case-shaped workpiece take-in position, and to be able to move up and down. An indexing base is provided which can be moved and moved up and down together with the base and which is rotatably supported on a horizontal plane below the base. Further, the base is provided with a clamp mechanism capable of clamping a case-shaped work and an actuator for reciprocally rotating the indexing base. Further, the indexing base is provided with a center pin arranged on the rotation axis thereof for centering the case-like work and an indexing pin insertable into the coupling bolt hole of the ring-like work and the case-like work, respectively. Has been.

[0007]

According to this structure, while the indexing base is rotated by the actuator at the assembling position, the indexing pin is inserted into the bolt hole of the ring-shaped work (ring gear), whereby the position of the ring-shaped work is indexed. To do. Thereafter, the base is moved together with the indexing base to the position where the case-shaped work (differential case) is taken in, and the work is centered by the center pin and clamped by the clamp mechanism, and the case-shaped work is directed to the assembly position. To carry.

During this conveyance, the indexing base is rotated by an actuator, and the indexing pin is inserted into the bolt hole of the case-shaped work to position-determine the position of the ring-shaped work. Then, at the assembling position, the case-like work is inserted (press-fitted) into the ring-like work with the bolt holes aligned with each other, and the assembling work of both works is completed.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. In addition, in the following embodiments, the ring gear (ring-shaped work) W1 and the differential case (case-shaped work) W2 of the vehicle differential device shown in FIGS. 6 and 7 are used.
The device of the present invention is applied to the assembling.

First, in FIGS. 4 and 5 showing the outline of the entire assembling apparatus, the movable base 10 of the orthogonal robot is attached to the first rail 12 so as to be movable and controllable in the direction of arrow A--A. The second rail 14 is attached to the second rail 14 so that the movement of the second rail 14 can be controlled in the direction of an arrow BB orthogonal to the arrow AA. Moreover, a lifting cylinder 16 is attached to the movable table 10, and a support bracket 19 is fixed to the lower end of the operating rod of the cylinder 16.

A base 40 of an indexing mechanism described below is fixed to the lower portion of the support bracket 19.
Therefore, by moving the movable table 10 in the directions of arrows A-A and B-B, the base 40 of the indexing mechanism is installed at the mounting position 20 shown in FIGS. 4 and 5, or the take-in position of the differential case W2 shown in FIG. It can be moved to 24. The base 40 can be moved up and down by operating the lifting cylinder 16.

The pallet 22 at the assembling position 20 is set with the ring gear W1 of the differential device carried therein. Further, at the take-in position 24, the differential case W2 carried in here is placed in the posture shown in the drawing.

FIG. 1 is an enlarged sectional view of the indexing mechanism, and FIG. 2 is a plan view seen from the direction of arrow C in FIG. In these drawings, a support shaft 42 is provided on the base 40 by a bearing 44 so as to rotate around its axis. Similarly, as shown in FIG. 2, the base 40 is provided with a cylinder 46 as an actuator that reciprocally rotates the indexing base 50 described below. Further, the base 40 is provided with a clamp mechanism 70 described later.

The indexing base 50 is composed of a first base 50A and a second base 50B which are arranged in parallel with each other. The first base 50A is fixed to the lower end portion of the support shaft 42 by a bolt 52 and a rotation stopping pin 53. Therefore, the first base 50A is movable together with the base 40 and is rotatable with respect to the base 40 about the axis of the support shaft 42.

An end of an operating rod 48 of the cylinder 46 is connected to a part of the first base 50A as shown in FIG. Therefore, when the operating rod 48 of the cylinder 46 is reciprocated, the first base 50A repeats reciprocating rotation about the axis of the support shaft 42 on a horizontal plane parallel to the base 40. This operation is the ring gear W
1 and the differential case W2 are basic functions for indexing.

On the other hand, the second base 50B is assembled to the first base 50A in a relative positioning state by a pair of fixed shafts 54 whose upper ends are fixed to the base 50A. The second base 50B is slidable in the vertical direction along the fixed shaft 54, and a spring 56 is interposed between the bases 50A and 50B. That is, the second base 50B is floatingly supported by the elasticity of the spring 56 with respect to the first base 50A.

A center pin 58 is fixed to the lower surface of the second base 50B on the axis of the support shaft 42 (the rotation axis of the first base 50A). The lower end of the center pin 58 can be inserted into the shaft insertion hole W2c of the differential case W2 as shown on the left side of the center line in FIG. 1, whereby the differential case W2 can be centered. Moreover, the second base 50B is provided with an indexing pin 60 for indexing the position of the ring gear W1 and an indexing pin 66 for indexing the position of the differential case W2 so as to be vertically slidable. Although two indexing pins 60 and 66 are provided, only one indexing pin 60 is shown.

One of the indexing pins 60 and 66 is provided with its head and the second base 5.
A spring 64 interposed between each bracket 62 fixed to 0B is always urged downward. The lower ends of these indexing pins 60 are set to have a diameter that allows them to be inserted into the bolt holes W1a of the ring gear W1. The other indexing pin 66 is connected at its upper end portion to an operating rod of a cylinder 67 provided on the first base 50A. The lower ends of these indexing pins 66 are set to have diameters that can be inserted into the bolt holes W2a and W1a of the differential case W2 and the ring gear W1.

Further, on the lower surface of the second base 50B,
The temporary indexing guide 68 is fixed with bolts 69.
The provisional indexing guide 68 is set to have a width L (see FIG. 2) that is inserted between the plurality of ribs W2b formed on the outer periphery of the differential case W2.

The clamping mechanism 70 is shown in FIG. The clamp mechanism 70 will be described with reference to FIGS. 2 and 3. Four pairs of bearing retainers 72 are fixed to the left and right of the base 40, one pair each. The left and right clamp shafts 73, which are rotatably supported by the retainers 72, have the base ends of the clamp hands 74 fixed so as to rotate together with the shafts 73. As shown by the phantom line in FIG. 3, a clamp claw 75 capable of clamping the flange portion of the differential case W2 is attached to the lower ends of the clamp hands 74.

A base end portion of a link lever 76 is fixed to each of the clamp shafts 73, and a tip end portion of each of the link levers 76 is connected by a connecting pin 78 so as to be relatively rotatable. Further, an end of an operating rod 82 of a clamp cylinder 80 provided on the base 40 is connected to the connecting pin 78.

When the operating rod 82 is projected downward as shown by the solid line in FIG.
Is located outside the outer periphery of the flange portion of the differential case W2, and by pulling in the operating rod 82, the flange portion of the differential case W2 can be clamped by both clamp claws 75 as shown by the phantom line in FIG. In this clamped state, the link levers 76 are received by the pair of stoppers 84 fixed to the base 40.

Next, the ring gear W1 by the assembling device
Positioning and mutual assembling of the differential case and the differential case W2 will be described.

First, the base 40 is moved to the mounting position 20 shown in FIGS. 4 and 5. Here, the lifting cylinder 16 is operated to lower the base 40 together with the indexing base 50, while the rotating cylinder 46 is operated to reciprocate the indexing base 50 with respect to the base 40 about the axis of the support shaft 42. To move. As a result, the ring gear W1 set on the pallet 22 is
For the two bolt holes W1a of
The end of 0 enters on the right side of the center line in FIG. 1 as shown by the imaginary line, and the position of this ring gear W1 is indexed.

Subsequently, the base 40 is indexed to the base 5
After raising the index pin 60 with 0, the index pin 60 is pulled out from the bolt hole W1a of the ring gear W1, and then the base 40 is moved to the take-in position 24 of the differential case W2. Therefore, the base 40 together with the indexing base 50 is used as a differential case W.
Lower toward 2. As a result, the center pin 58
Is inserted into the shaft insertion hole W2c of the differential case W2 as shown on the left side of the center line in FIG. 1, and the temporary indexing guide 68 enters between the ribs W2b of the differential case W2. As a result, centering (centering) of the differential case W2 and provisional position indexing are performed.

In parallel with this, both clamp hands 74 of the clamp mechanism 70 are operated as described above, and the flange portion of the differential case W2 is clamped by the respective clamp claws 75 as shown by the phantom line in FIG. In this state, the base 40 is raised, and the assembly position 2 is again set.
Move toward 0.

While the differential case W2 is being conveyed, the indexing base 50 and the base 40 are moved in the same manner as described above.
Reciprocally rotate with respect to. As a result, the indexing pin 66 is inserted into the bolt hole W2a of the differential case W2 as shown by a virtual line on the left side of the center line in FIG. 1, and the position of the differential case W2 is indexed.

Next, at the assembling position 20, the base 4
0 is lowered, and the differential case W2 is inserted (press-fitted) into the inner circumference of the ring gear W1 as shown on the left side of the center line in FIG. At this time, the indexing pin 66 enters the bolt hole W1a of the ring gear W1 while being inserted into the bolt hole W2a of the differential case W2. Therefore, the ring gear W1 and the differential case W2 are assembled in a positioning state in which the mutual bolt holes W1a and W2a are aligned.

After that, both clamp hands 74 of the clamp mechanism 70 are opened as shown by the solid line in FIG. 3, and the clamping of the differential case W2 by the respective clamp claws 75 is released.
Then, the operating rod of the cylinder 67 is operated to move the cooler duct upward to move the indexing pin 66 to the ring gear W.
1 and the bolt holes W1a and W2a of the differential case W2, the base 40 is lifted to complete the work.

[0030]

As described above, according to the present invention, the three steps of indexing the position of the ring gear, which is a ring-shaped work, transporting and indexing the position of the differential case, which is a case-like work, and assembling these two works, can be performed with a single facility. Everything can be done, and thus work time and work space can be reduced.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an indexing mechanism.

FIG. 2 is a plan view seen from the direction of arrow C in FIG.

FIG. 3 is a configuration diagram showing a clamp mechanism.

FIG. 4 is a front view showing the outline of the entire assembling apparatus.

FIG. 5 is a side view showing the outline of the entire assembling apparatus.

FIG. 6 is a cross-sectional view of the differential case with a ring gear fixed.

FIG. 7 is a plan view of the differential case with the ring gear fixed.

[Explanation of symbols]

 40 Base 46 Actuator (Cylinder) 50 Indexing Base 58 Center Pin 60,66 Indexing Pin 70 Clamping Mechanism W1 Ring Work (Ring Gear) W2 Case Work (Differential Case) W1a, W2a Bolt Hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoichi Eda 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Nagatoshi Kurata 130 130 Oike, Hanemachi, Okazaki City, Aichi Prefecture

Claims (1)

[Claims] 1. A ring-shaped work set in advance at a predetermined assembly position and a case-shaped work inserted into the work in a centered state are circumferentially phase-positioned, and then joined to each other. A two-part assembling device for assembling in a state in which bolt holes for the parts are aligned with each other, and is configured to be movable between the assembling position and a take-in position of a case-shaped workpiece and capable of being lifted and lowered. A base, and an indexing base that can move and elevate relative to the base together with the base and that is rotatably supported on a horizontal plane below the base, and a clamping mechanism capable of clamping a case-shaped work on the base, An actuator that provides reciprocating rotation to the indexing base is provided, and the case-like work is disposed on the indexing base on the rotation axis thereof. And center pin capable centering ring-shaped workpiece and the case-shaped workpiece the coupling bolt holes in the assembly device for a secondary component characterized in that the respective insertable indexing pins are provided for.