JPS63237825A - Oil seal press-fit device - Google Patents

Abstract

PURPOSE:To promote the improvement of work efficiency, by providing press fit jigs equipped with a guide rod, holding an oil seal, and a pusher, extruding the oil seal in the axial point direction, in both sides of a press fit station which sets a workpiece to a fixed position. CONSTITUTION:Oil seal supply units 2, 2' are arranged in both side parts of a press fit station 1, and it provides long-sized guide rails 7a, 7a in both sides, sliders 7 in these rails, each lift frame 8 in the slider, each slide rod 9 in each lift frame, movable frame 3 in the point end of this slide rod 9 and mounts a press fit jig 6 to this movable frame 3. The press fit station, moving this press fit jig 6 to the oil seal supply units 2, 2' to receive seals B, B' next moving the jig 6 to a press fit position of a transmitting case A, fits each seal B, B'. In this way, work efficiency improves by enabling each seal B to be automatically further simultaneously press fitted to a pair of shaft member insertion holes.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides an oil seal for inserting an oil seal from the outside into a pair of shaft member insertion holes formed by aligning the hole axes on both the left and right sides of a crankcase or other workpiece. The present invention relates to an oil seal press-fitting device for press-fitting oil seals.

(Prior Art) Conventionally, when press-fitting an oil seal into a pair of shaft member insertion holes formed on both left and right sides of a workpiece, the oil seal is manually fitted on one side at a time using a press-fitting jig.

(Problems to be Solved by the Invention) Manual press-fitting as described above is inefficient, and it is desired to automate the press-fitting process.

Here, on both sides of the press-fitting station where the workpiece is placed,
A press-fitting jig is provided, which includes a guide rod that slidably holds the oil seal on its inner periphery, and a pusher that can move forward and backward to push the oil seal held by the guide rod forward in the axial direction. It may be possible to fit the oil seal into each insertion hole by moving the pusher forward toward each insertion hole, but in this case, if the pusher was moved forward on each side separately, the backup mechanism would be subject to press-fit stress. Therefore, the structure of the device becomes complicated, and the work takes a lot of time, making it difficult to expect much improvement in work efficiency.

An object of the present invention is to provide a device that solves these problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention has provided an oil seal that is press-fitted from the outside into a pair of shaft member insertion holes formed by aligning the hole axes on both the left and right sides of a workpiece. In a press-fitting device, a guide rod that slidably holds an oil seal on its inner periphery and a pusher that can move forward and backward in an axial direction push the oil seal held by the guide rod on both sides of a press-fitting station where a workpiece is placed. Each of the press-fit jigs can be freely positioned such that the donation buttons match the hole axes of the eight insertion holes, and each of the buttons is directed toward the eight insertion holes. It is characterized by having a forward movement mark at the same time.

(Function) First, with the oil seal inserted into each guide rod and set, each press-fit jig is positioned so that each button shear matches the hole axis of each insertion hole of the workpiece placed in the press-fit station. In this state, each button shear is simultaneously moved forward toward each insertion hole. According to this, the oil seal held on each guide rod is pushed out by each button shear and touches the rim of each insertion hole of the workpiece. By the subsequent advancement of each bushing, each oil seal is fitted into each insertion hole.

In this case, by pushing each pusher V- toward the workpiece and moving it forward at the same time, the press-fitting stress will be applied to the workpiece from both the left and right sides at the same time, thus eliminating the need for a backup mechanism to receive the press-fitting stress from each pusher. .

(Example) The drawing shows a pair of crankshaft insertion holes formed by aligning the hole axes on both the left and right sides of a transmission case A having a crankcase as a workpiece shown in Fig. 6, and an oil seal B inserted into A1 from the outside. 1 to 5, (1) is a press-fitting station in the middle of the assembly line, (2) (2) is a press-fitting station (1),
) are respectively arranged on both sides of the press-fitting station (1), and on both sides of the press-fitting station (1), there are predetermined press-fittings facing the respective insertion holes of the transmission case A fixed at the station (1). A movable frame (3) is provided at a predetermined oil seal receiving position opposite to each of the supply devices (ri), and an oil seal B is slidably disposed on the inner circumference of each movable frame (3). A press-fitting jig (6) is provided, which includes a guide rod (4) to hold the guide rod (4) and a pusher (5) that can move forward and backward to push the oil seal B held by the guide rod (4) forward in the axial direction. , move each press-fitting jig (6) to the oil seal receiving position, receive each oil seal B from each supply device (wa) to each guide rod (4), and move each press-fitting jig (6) to the press-fitting position. The press-fitting jigs (6) are positioned so that the respective guide rods (4) match the hole axes of the respective insertion holes A1 of the transmission case A fixed at the press-fitting station (1). (5) are simultaneously moved forward toward the transmission case A so that the oil seals B can be press-fitted into the respective insertion holes A1.

More specifically, longitudinal guide rails (7a) (7a) are provided on both sides of the press-fitting station (1) in the direction of the assembly line, and a slider (7) is mounted on each rail (7a) by a drive source (not shown). Each slider (7) is provided so as to be slidably supported in the front-back direction, and each elevating frame (8) is supported on each slider (7) so as to be movable up and down by a drive source (not shown) via an elevating rod (8a). Each slide rod (9) is supported by a drive source (not shown) on each elevating frame (8) so as to be movable laterally, and each movable frame (3) is attached to the tip of each slide rod (9). , each movable frame (3)
The movement of each slider (7), each elevating frame (8), and each slide rod (9) allows movement in three orthogonal axes directions: front and back, lateral, and up and down.

In addition, each press-fitting jig (6) has a guide bar (
6b) is provided protrudingly, and the guide bar (6b) has a long groove (
6C) and a key member (4) on the holder (4a).
C) to prevent the holder (4a) from rotating and to slidably support the holder (4a) on the guide bar (6b);
The guide rod (4) is bolted to the tip of the holder (4a), and the cylindrical pusher tt-(
5) is slidably inserted into the pusher (4) with the guide rod (4) protruding from the opening at the tip of the pusher (4), and the holder (4a) is inserted into the pusher (4) by the spring (4b) on the outer periphery.
5), and a stay (5a) fixed to the tail end of the pusher (5) is connected to a piston rod of an air cylinder (6C) provided in the jig frame (6a), and the pusher (5) is pushed forward. - (5) is configured so that the air cylinder (6C) moves forward and backward in the lateral direction by the operation of the air cylinder (6C); Each pressure chamber was connected to an air supply source (not shown) through a common switching valve, so that the air cylinders (6C) could be operated simultaneously by switching the switching valve.

As shown in FIGS. 4 and 5, each of the oil seal supply devices has vertically elongated guide holes (2b) in which the oil seals B are inserted in a row in the radial direction in the jig frame (2a). )
, a slider (2d) on the lower side of the guide hole (2b) having a receiving hole (2C) for receiving one oil seal B, and a side force discharging hole (2e) on the lower side of the guide hole (2b). ), and a support arm (2'') supporting the oil seal B is pivotably pivoted downward against a spring (2g) below the discharge hole (2e), The slider (2d
) to a right-hand receiving position where the receiving hole (2C) matches the guide hole (2d) and a left-hand dispensing position where the receiving hole (2C) matches the dispensing hole (2e) using an air cylinder (not shown). The oil seal B@, which is movable and is conveyed from a parts feeder (not shown), is inserted into the guide hole (2b) from above, and the slider (2d) is received so that the oil seal B@ is conveyed from the parts feeder (not shown).
2C) so that the oil seals B can be supported one by one on the support arm (2f) so as to be removable.

In the illustrated example, the movable frame (3) on the negative side (lower side in Figure 1) is installed so that the oil seal B' can be press-fitted into the final shaft insertion hole A+' of the transmission case A fixed at the press-fitting station (1). Press-fit jig (6) similar to the press-fit jig (6) described above.
At the same time, a backup member OG driven by a cylinder (10a) is installed in parallel on the side of the press-fitting jig (6) of the movable frame (3) on the other side, and a press-fitting station (1 ) on the negative side (lower side in Figure 1) of the press-fitting jig (6').
An oil seal supply device (2') similar to the aforementioned supply device (2) capable of supplying the oil seal B' was provided.

In the drawing, c indicates a pallet on which the transmission case 8 is set.

Next, to explain the operation of the embodiment, first, the movement of each movable frame (3) moves each press-fitting jig (6) (6') to each guide rod (4).
) is moved to a predetermined receiving position that matches the hole axis of the oil seal B supported on the support arm (2f) of each oil seal supply device (2) (2'), and then each press-fitting jig (6)
(6') Each guide rod (
4) into the inner periphery of the oil seals B and B' supported on each support arm (2f), and in that state insert each press-fit jig (6
) (6') to the front in the assembly line direction (to the left in Fig. 1), and install oil seals B and 8' on each guide rod (4) to receive them from the oil seal supply devices (2) and (2'), respectively. Then, each press-fitting jig (6) (6') is placed in a predetermined position of the press-fitting station (1) through the insertion hole A of the transmission case A.
Move each guide rod (3) to a predetermined press-fitting position where it matches the hole axis of I, and with each press-fitting jig (6) positioned at that press-fitting position, simultaneously operate each air cylinder (6C) to the extension side. Then, each pusher (5) moves forward inward in the lateral direction toward the transmission case A. According to this, each pusher (5) moves the kite rod (4) through the holder (4a). ) moves forward, and the key member (4a) of the holder (4a) hits the step at the tip of the long groove (-d) of the guide bar (6b).
4C) comes into contact with the holder (4a), and therefore the guide rod (4) is prevented from further advancing (in the state I shown in the sixth figure).
Then, as the pusher (5) continues to move forward against the spring (4b), the oil seal B held on the guide rod (4) is pushed forward in the axial direction by the tip surface of the pusher (5). Each oil seal B is fitted into each insertion hole A by matching the mouth edge of each insertion hole A, and by the subsequent advancement of each busher (5).

Next, after operating each air cylinder (5C) to the contraction side and retracting each bushing (4), the press-fitting jig (6') is inserted into the final shaft insertion hole A,' of the transmission case A so that the guide rod is inserted into the final shaft insertion hole A,'
At the same time, move the backup member (IO) so that its center axis coincides with the hole axis, and transmit the pusher of the backup member 00 and the press-fitting jig (6'). The oil seals B' are simultaneously moved forward toward the case A and fitted into the insertion holes A,/.

Next, the pusher 11- of the press-fitting jig (6') is retracted, and the cylinder (10a) is operated to the contraction side to retract the backup member aO.
) to the oil seal receiving position and repeating the above operation, the oil seals B and B' are automatically press-fitted into the insertion holes A, , A+' of the transmission case A, respectively.

By moving each pusher (5) forward toward transmission case A at the same time, press-fit stress is applied to transmission case A from both the left and right sides at the same time. Therefore, the press-fit stress caused by each pusher (5) is reduced. There is no need for a backup mechanism.

(Effects of the Invention) As described above, according to the present invention, the oil seals can be press-fitted into the pair of shaft member insertion holes formed on the left and right sides of the workpiece automatically and at the same time, thereby improving work efficiency. Furthermore, since each bushing is moved forward toward the workpiece at the same time, there is no need to provide a backup mechanism, which simplifies the construction of the device and has the advantage of being beneficial.

[Brief explanation of the drawing]

Fig. 1 is a plan view of one example of the device of the present invention, Fig. 2 is a front view thereof, Fig. 3 is an enlarged cutaway front view of a press-fitting jig, and Fig. 4 is a
FIG. 5 is a partially cutaway enlarged side view of the oil seal supply device, and FIG. 6 is a developed cutaway plan view of the transmission case. (1)...Press-fitting station (4)...Guide rod (5)...Button shear (6)...Press-fitting jig A...Transmission case (work) A,...Insertion hole B ···Oil seal

Claims (1)

[Claims] In a press-fitting device that press-fits oil seals from the outside into a pair of shaft member insertion holes formed by aligning the hole axes on both the left and right sides of a workpiece, the oil seals are placed on the inner periphery on both sides of a press-fitting station where the workpiece is fixed. Each press-fitting jig is provided with a guide rod that is slidably held and a pusher that is movable forward and backward to push the oil seal held by the guide rod forward in the axial direction. An oil seal press-fitting device characterized in that the oil seal press-fitting device is capable of being freely positioned so as to coincide with the hole axis of the insertion hole, and furthermore, each of the pushers can be freely moved forward toward each of the insertion holes at the same time.