JPH047849Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a press-fitting device, and more specifically, a press-fitting device for press-fitting a wide variety of articles into a workpiece attached to a workpiece holder using a press-fitting tool at the bottom of a press-fitting head. This article relates to a press-fitting device that allows for press-fitting. This is used, for example, in the field of press-fitting articles such as bearings and gears into transmission shafts, which are one of the automobile parts.

[Prior art]

Many automobile parts and the like are completed by being assembled into a workpiece by press-fitting. For example, press fitting is performed when assembling a valve seat such as an intake valve or an exhaust valve into a recess located diagonally above the cylinder head. At this time, the cylinder head is held in an inverted position and fixed to the workpiece holder, the press-fitting head is tilted to match the axis of the valve seat, and then the press-fitting tool is lowered by the operation of a hydraulic cylinder to press-fit the valve seat. In the case of such parts, a single item is press-fitted and assembled into a workpiece to create a finished product, but in the case of transmission shafts, etc., which will be described later, a wide variety of items are press-fitted and assembled. be completed. If these press-fitting operations proceed smoothly and continuously, assembly line operations on the production line can be sustained and high productivity can be achieved.

[Problem that the invention attempts to solve]

In the above-mentioned press-fitting process in the production of automobile parts, if the work of press-fitting multiple items into a workpiece is not carried out efficiently, the flow of the line will stagnate, impeding improvements in automobile productivity. It will be. In recent years, in assembly lines at automobile factories, in addition to mass production of specific vehicle models, various parts that are applied to various vehicle models to meet diverse needs are successively produced. In order to produce such a wide variety of parts, various articles must be press-fitted into different workpieces. In the press-fitting process, it is necessary to quickly press-fit a plurality of articles into various types of workpieces, so efficiency of the press-fitting operation is required. By the way, depending on the parts, for example, the shape and dimensions of the transmission shaft will differ depending on the type of vehicle, and furthermore, the shape and number of articles to be press-fitted will also differ. As a result, with conventional press-fitting equipment equipped with a workpiece holder for mounting only a single workpiece, it is necessary to change or replace the workpiece holder each time an article is press-fitted into a different type of workpiece. This impairs the efficiency and speed of press-fitting work, and makes it impossible to handle assembly work in mass production or multi-mix production. As a result, there are problems such as a decrease in the productivity of automobiles and their finished parts. Therefore, in the press-fitting process of transmission shafts, where multiple bearings and gears are press-fitted into a finished product, efficiency has been improved while maintaining the ability to follow the assembly line. It is desirable to install a press-fitting device.

The present invention was developed in view of these problems, and its purpose is to enable simultaneous multi-axis press-fitting in a multi-mix production line where different workpieces are flown, which are completed by press-fitting multiple items. Another object of the present invention is to provide a press-fitting device that simplifies mounting of a workpiece to a workpiece holder, speeds up and streamlines press-fitting of articles, and improves productivity.

[Means for solving problems]

The present invention for solving the above problems is characterized in that a press-fitting head equipped with a press-fitting tool for press-fitting an article into a workpiece held in a tilted position is provided so as to be reciprocally movable; A work-holding tilting body for tilting the workpiece toward the press-fitting head is installed below the workpiece-holding tilting body, and the workpiece-holding tilting body has a plurality of indexing surfaces for holding the workpiece and rotates above the tilting center axis. A plurality of workpiece holders are attached.

[Effect]

Workpieces to be flown into the press-fitting process are respectively mounted on the indexing surfaces of a plurality of workpiece receivers held in vertical positions. Subsequently, the workpiece holding tilting body to which the workpiece holders are attached is tilted toward the press-fitting head, and the axes of the workpiece and the press-fitting head are aligned at the lower position. Next, when the press-fitting head is operated, the article is pressed and press-fitted into the workpiece. When the press-fitting head is retracted after the press-fitting is completed, the workpiece holding tilting body is returned to the vertical position, and the workpiece is removed and a new workpiece is attached. Note that by attaching different workpieces to a plurality of rotatable indexing surfaces provided on the workpiece holder, it is possible to accommodate various types of workpieces.

[Effect of idea]

The press-fitting device of the present invention includes a reciprocating press-fitting head equipped with a press-fitting tool, and a workpiece holding tilting body below which tilts the workpiece toward the pressfitting head. Since a rotatable workpiece holder having a protruding surface is attached, even if different shapes of workpieces are flown, they can be easily attached to the indexing surface suitable for them. the result,
It is possible to streamline the press-fitting process, such as speeding up and increasing the efficiency of press-fitting a plurality of articles into a workpiece, and it is possible to improve productivity on an assembly line for manufacturing parts of a wide variety of models. Also,
As the workpiece holding tilting body tilts, the positions of the workpiece and article being replaced by the worker and the press-fitting by the press-fitting head are shifted, so that there is no danger in the replacement work and the feeling of intimidation can be eliminated and the work can be carried out safely.

〔Example〕

The present invention will be described in detail below based on examples thereof. Press-fitting device 1 shown in FIGS. 1 and 2
is tilted downward by 10 degrees with respect to the vertical line N from the top 2a formed on the inclined surface of the frame 2,
An attached press-fit head 3 that can freely move back and forth, a workpiece holding tilting body 4 installed below the press-fitting head 3, and a plurality of rotatable pieces (three pieces are shown) attached to the workpiece holding tilting body 4. ) and a workpiece holder 5.

A base 6 is attached to the base of the frame 2,
Two bearings 7A and 7B fixed to the base 6
A horizontal shaft 8 is provided, and a middle portion of the horizontal shaft 8, which is a central axis of tilting, is rotatably supported by a half-split support portion 9. Therefore, the workpiece holding tilting body 4 can be tilted by 10 degrees about the horizontal axis 8 toward the press-fitting head 3 described above.

Further, as shown in FIG. 3, a tilting prevention member 7C integrally formed with the bearing 7A and having a holding hole 10 formed therein, and a tilting prevention member 7C that is fitted into and fixed to the horizontal shaft 8 and rotated at the same time are located adjacent to the tilting prevention member 7C. A member 11 is attached so that it slides on the tilting prevention member 7C when the horizontal shaft 8 rotates. The posture holding member 11 has a built-in pin shaft 12 that can be engaged with the above-mentioned holding hole 10, and a spring 13 is provided at that location. 10. Then, the tip of the lever body 14A is fitted into the central groove of the pin shaft 12, and as the operating lever 14 moves in the direction of arrow 15, the pin shaft 12 moves in the direction of arrow 16 against the elastic force of the spring 13. It's becoming like that. Note that the holding hole 10 in the tilting prevention member 7C is provided at a position where the workpiece holding and tilting body 4 can be maintained in a vertical state.

At the top of the horizontal shaft 8, a plurality of bearing stands 17A, 1 (six in total) forming the work holding tilting body 4 are provided.
7B is attached, and a plurality of (three in the figure) workpiece holders 5 are rotatably attached to a rotating shaft 18 supported by a bearing in each bearing stand 17A, 17B. In this example, a total of four indexing surfaces 19 are formed on the surface of the workpiece holder 5, and these are shaped to facilitate attachment of many different workpieces 20. In addition, the above-mentioned rotation shaft 18 includes
Handle 21 for rotating the workpiece receiver 5
is installed. Incidentally, since the workpiece holder 5 is deviated above the horizontal axis 8 which is the center axis of tilting, indexing can be easily performed. The rotation shaft 18 shown in FIG. 4 has four equally spaced holding holes 2.
2 are bored, and a hole 23 communicating with these holding holes 22 at the position shown in the figure is provided in the bearing stand 17B. A pin shaft 24 is fitted into these holes 22 and 23, and a pin 25 is fixed to an end position of the pin shaft 24. Further, a rotation holding member 26 is attached to the bearing stand 17B, a spring 28 is brought into contact with the substantially central side of the lever body 27A housed inside the rotation holding member 26, and a pin 25 is fitted into a long groove 29 at the tip. ing. A lever body 27A, which will be described later, is an operating lever 27.
When the pin 25 is rotated in the directions of arrows 30 and 31,
The pin shaft 24 can be moved in the directions of arrows 32 and 33 while being relatively moved in the long groove 29. Further, the lever body 27A is urged in the direction of arrow 33 by the elastic force of the spring 28, and when the lever 27 is in the position indicated by the solid line, the pin shaft 24 fits into the holding hole 22 and the rotation shaft 18 is attached to the bearing stand 17B. Can be fixed. Further, the stopper device 34 is fixed to the base 6, and the workpiece holding tilting body 4 is moved from the vertical position in the direction of arrow 52, that is, 10 degrees toward the press-fitting head 3.
When the rotation is completed (see Figure 2), the stopper fitting 34a is used to determine the position when the rotation is complete and to maintain the rotation position.
It is done in

A load cell 38 is attached to the piston rod 37a between the press-fitting tool 36 attached to the press-fitting head 3 shown in FIG. 5 and the hydraulic cylinders 37 (three shown) attached to the top 2a of the frame 2.
, a connecting shaft 39 , a common base 40 fixed to the frame 2 , and a shaft 4 surrounded by a spring 41
2 and a rotating plate member 43 are interposed. The press-fitting head 3 is designed to reciprocate in a direction inclined by 10 degrees with respect to the vertical line N shown in FIG. By reciprocating the press-fitting head 3, the press-fitting tool 36 can press-fit the article into the workpiece 20 mounted on the workpiece receiver 5. Also, the shaft 4 of the press-fit head 3
2 is removably fitted at the tip 39a of the connecting shaft 39, and the elastic force of the spring 41 acts in a direction to move the rotating plate 43 away from the shaft 42. In addition, the rotation center axis 4
One end 44a of 4 is fixed to the common base 40, and the other end 44b is attached to a rotating plate 43 via a plurality of (two in the figure) bearings 45. By rotating, the press-fitting tool mounting seat 4 can be
6 is about to be replaced. That is, when the shaft 42 is fitted into the rotating plate 43 and the press-fitting tool 36 is manually pulled downward, the tensile force resists the elastic force of the spring 41 and the shaft 42 is connected to the connecting shaft 39. can be separated from At this time, the press-fitting head 3 is rotated as the rotary plate 43 is rotated. In addition, there are three press fitting mounting seats 46 for efficient replacement.
For example, the rotation center axis 44 of the rotation plate material 43
They are arranged at angular intervals of 120 degrees around the center to facilitate replacement work. moreover,
The press-fitting tool 36 and the shaft 42 are connected by fitting the press-fitting tool 36 into the pin shaft 42a and detachably attaching it with a screw member or the like.
It is formed to have a horseshoe-shaped cross-section, making it easier to attach and detach the workpiece 20.

As shown in FIG. 1, in the press-fitting apparatus 1, the flow of the work is in the direction of an arrow 53, from the left to the right from the first station to the third station. With this arrangement, even if various types of workpieces 20 are flown in the direction of the arrow 53, an appropriate press-fitting tool 36 can be selected so as not to hinder the press-fitting operation. Incidentally, as shown in FIG. 2, a hydraulic device 47 for supplying hydraulic pressure to the hydraulic cylinder 37 is provided, and an operation panel 48 is attached to the front surface of the press-fitting device 1.

According to the press-fitting device having such a configuration, an article can be efficiently press-fitted into a workpiece in the following manner.

A pin body 49 for a transmission shaft 20 formed in a hollow shaft is fixed to the indexing surface 19 of the workpiece holder 5 shown in FIG. Since it is in an upright position, the pin body 49
Transmission shaft 20, which is the workpiece
be installed manually. At this time, when the operating lever 14 shown in FIG.
are all held vertically. The transmission shaft 20 shown in FIG.
The gear 61B is formed integrally with the transmission shaft 20 in the previous process.
have already been press-fitted, and at this first station, preparations are made for press-fitting the bearing inner race 60A and the clutch hub 62. In addition to the integral gear 61A, the transmission shaft 20 shown in FIG. 7 includes a bearing inner race 60.
A, the gear 61B, and the clutch hub 62 have already been press-fitted, and at this second station, first, the gear 61C with the serrations cut thereon is manually fitted into the serration portion 20a of the transmission shaft 20. Then, preparations are made to press fit a new gear 61D into the upper part of the gear 61C. Next, the bearing inner race 60A, gears 61A to 61D, and clutch hub 62 are already installed on the transmission shaft 20 shown in FIG. 8, and at this third station, the gear 61E and the bearing inner race 60B are press-fitted. Set standards.

Next, in order to tilt the workpiece 20 to a position where it can be press-fitted into the press-fitting head 3, the operating lever 1 shown in FIG.
4 in the direction of arrow 15, and the work holding tilting body 4 is tilted 10 degrees toward the press-fitting head 3. At this time, the engagement between the pin shaft 12 and the holding hole 10 is disengaged, so that the work holding tilting body 4 can be easily tilted manually. Furthermore, a stopper device 34 shown in FIG. 4 positions and stops the tilting of the workpiece holding and tilting body 4 in the direction of arrow 52, and also maintains the tilted position. As a result, the transmission shaft 20 in the workpiece holder 5 integrated with the workpiece holding tilting body 4 aligns with the axis of the press-fitting head 3, so when the operation panel 48 (see FIG. 1) is operated, the The hydraulic cylinders 37 are extended at the same time,
A press-fitting tool 36 shown in FIGS. 6 to 8 press-fits the clutch hub 62 together with the bearing inner race 60A, the gear 61D, and the bearing inner race 60B together with the gear 61E. As a result of this press-fitting, although not shown, in the third station, the bearing inner races 60A located at the lower and upper ends of the transmission shaft 20,
60B, all the gears 61A to 61E and the clutch hub 62 come into contact with each other, completing the press-fitting. Note that, as a reference before press-fitting, the workpiece 20 scheduled to be press-fitted may be attached in advance to the other indexing surface 19 of the workpiece holder 5 in order to streamline the press-fitting process. In short, by effectively utilizing the plurality of indexing surfaces 19, it is possible to increase the capacity of the press-fitting device 1.

Further, when the work holding tilting body 4 is manually returned to the vertical position after the press-fitting is completed, the operating lever 14 is also returned, and the pin shaft 12 and the holding hole 10 are engaged to maintain the vertical position. In addition, in this example, the press fitting tool 36
The shapes are different for the first to third stations, and shapes convenient for press-fitting are used. In addition, since three press-fitting tool mounting seats 46 are prepared for each station, appropriate press-fitting tool 3
6 and select it as appropriate.

If the press-fitting device is used not only for the transmission shaft mentioned above but also for press-fitting to complete different parts, the press-fitting capacity will be improved and it will be possible to handle the assembly line work in mass production and multi-mix production, which will improve productivity. improvement can be achieved.

[Brief explanation of the drawing]

Figure 1 is an overall front view of the press-fitting device of the present invention;
The figure is a side view of the press-fitting device, Figure 3 is an overall front view of the work holding tilting body, Figure 4 is a sectional view taken along the - line in Figure 3, Figure 5 is an overall view of the press-fitting head, and Figures 6-
FIG. 8 is an explanatory diagram of the press-fitting operation of the workpiece. DESCRIPTION OF SYMBOLS 1... Press-fitting device, 3... Press-fitting head, 4... Work-holding tilting body, 5... Workpiece receiver, 8... Tilt center axis (horizontal axis), 19... Indexing surface, 20...
Work (transmission shaft), 36...
...Press fitting tool.

Claims (1)

[Scope of Claim for Utility Model Registration] A press-fitting head equipped with a press-fitting tool for press-fitting an article into a workpiece held in a tilted position is provided so as to be reciprocally movable, and the workpiece is placed below the press-fitting head in the direction of the press-fitting head. A work-holding tilting body for tilting is installed, and a plurality of workpiece holders having a plurality of indexing surfaces for holding the workpieces and rotating above the tilting center axis are attached to the work-holding tilting body. A press-fitting device characterized by: