JPH0131779Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a bearing lubricating device used in a scrap crusher.

In a scrap crusher that grabs or crushes scrap, a pair of left and right arms are pivoted in the middle by pins on a support suspended from the arm of a work vehicle, and a hydraulic cylinder is installed between the upper ends of each arm. This is then activated to grip or crush the scraps with the lower end of the arm. At this time, the middle parts of the arms are connected with a connecting plate and a pin so that the left and right arms move equally. A large force is applied to the pin pivot parts between these arms and the support, and the pin pivot parts between the arms and the connecting plate, so insert a bearing pusher and apply grease from the grease nipple to prevent seizure. ing. This greasing means, as is commonly done, includes an axial hole in the pin and a grease nipple at the end of the shaft, from which the contact surface between the pin and the bearing pusher is supplied with grease. . The position of this grease nipple is exposed to the outside for the pin that connects the arm and the support, but it is hidden inside the support for the pin that connects the arm and the connecting plate, so it cannot be greased. Therefore, a hole should be drilled at a position that corresponds exactly when the arm is in a certain state, for example, when the lower end is in the closed state, so that the grease nipple is visible and can be lubricated only in this state. ing.

Problems to be solved with this idea As mentioned above, it is not desirable to make holes in the support, even though they are for greasing the pins that connect the arms and the connecting plates, as this reduces the strength of the support. . Also, when greasing, the arm must be closed at the bottom, otherwise the grease nipple will not be in the hole position, which is inconvenient. If this is to be done, the shape of the hole must be made into a large elongated hole, which is undesirable because it further reduces the strength of the side plate of the support.
Also, regarding the pin itself, drilling holes in the pin reduces the strength of the pin, so in order to compensate for this, it is necessary to change the material, heat treatment, and R during machining.
Due consideration had to be given to the removal, which caused an increase in costs.

The object of this invention is to provide a greasing means that solves the above-mentioned problems.

Means for Solving the Problem The means of this invention taken to solve the above problem are: (a) Two pins are pivotally supported on one member through bearing pushers, and each separate member is connected. be like that.

(b) Two annular grooves are provided on the outer periphery of the bearing pusher of one of the pins.

(c) Each annular groove is provided with a conductive path from a separate grease nipple.

(d) A diametrical hole is provided in one of the annular grooves so that the pin can be directly lubricated.

E. The other annular groove was passed through the annular groove of the bearing push of the other pin through a conductive path provided in the member.

It is.

Function: Since there is no need to drill a hole for greasing the pin, the strength of the pin does not decrease, and there is no need to make the pin larger or use a higher quality material, so cost increases can be avoided.

Even if one pin is in a hidden position, greasing can be done via the other pin, making greasing easy and eliminating the inconvenience of having to drill a hole in the side plate for greasing, which would reduce the strength of the side plate. This makes it possible to make the entire structure more compact and lighter in weight, reducing costs.
In addition, the weight reduction improves the stability of the aircraft during work.

Embodiment An embodiment of this invention will be described in detail based on the drawings.

Reference numeral 1 denotes a support for a scrap crusher, in which the middle part of an arm 3 is rotatably supported by pins 2 on both sides of the lower part, and a hydraulic cylinder 4 is installed between the upper parts of both arms 3.
are each pivoted by a pin 5, and the hydraulic cylinder 4 is actuated so that the scrap can be grasped at the lower part of the arm 3, or the scrap can be cut with a cutter 6 fixed to the lower part of the arm 3. A connecting plate 7 for connecting both arms 3 is rotatably supported by a pin 8 at a portion of the intermediate portion of the arm 3 that is closer to the inside than the pin 2 of the pivot portion between the arm 3 and the support body 1.
The connecting plate 7 is provided so that when the arm 3 is operated by the hydraulic cylinder 4, the lower end of the arm 3 rotates at the same speed about the center line 0.

FIG. 2 is a sectional view showing a portion where the arm 3 and the support body 1 are pivotally supported by the pin 2, and a portion where the arm 3 and the connecting plate 7 are pivotally supported by the pin 8. The support body 1 is formed with a boss 11, a pusher 12 is inserted into the boss 11, and a pin 2 is inserted into these pushers 10, 12. . A considerable space is created between the left and right pushbuttons 10, and in this space there is a collar 13 of exactly the same length as the space.
is inserted. The collar 13 is made of the same material as the pushbutton 10, and has two different annular grooves 14 and 15 on its outer periphery. It is being formed. One annular groove 14 is connected to this collar 13 and the pushbutton 1.
This is for lubricating the pin 2 into which the pin 2 is inserted, and has several diametrical holes 16 around the entire circumference, through which grease flows onto the surface of the pin 2. A grease passage 17 diagonally communicates with the annular groove 14 from the arm 3, and a grease nipple 18 is attached to the opening thereof. The other annular groove 15 is slightly wider than the annular groove 14 and has a passage 17 communicating with the annular groove 14 of the arm 3.
A grease passage 19 diagonally communicates from the opposite side, and a grease nipple 20 is attached to the opening of the passage 19. 21 is pin 8 arm 3
22 is an annular groove formed on the outer periphery of the pushbutton, and 23 is an annular groove formed in the annular groove 22.
There are several diametrical holes around the entire circumference. 24
is a passage provided in the arm 3 to connect the annular groove 15 of the collar 13 and the annular groove 22 of the pusher 21 so that grease can flow between the two, and the grease injected into the grease nipple 20 can reach the pin 8 through the passage 24.

Note that 25 is a retaining plate for the pin 8, and 26 is a retaining bolt thereof. Further, 27 is a set screw for fixing the pin 2, which is screwed into the side end of the pin 2, and the pin 2 is supported by connecting the set screw 27 and the boss portion 11 with a bolt 28. It is fixed to body 1.

This device is constructed as described above, and during work, the arm 3 is rotated around the pin 2 by operating the hydraulic cylinder 4, and the lower part of the arm 3 grasps scrap or other material, or the cutter 6 is used to cut it. In this way, the left and right arms 3 are rotatably connected to the connecting plate 7 and the pin 8 at the intermediate portion, so that the rotational state of the left and right arms 3 is aligned with the center line. The speed becomes the same around 0, and the object to be grasped can be grasped correctly.

When the pins 2 and 8 are to be greased for maintenance, this is done through two grease nipples 18 and 20 attached to the arm 3. In the case of pin 2, by injecting grease into the grease nipple 18, passage 1
7. The oil reaches the outer peripheral surface of the pin 2 through the annular groove 14 and several holes 16 provided in the annular groove 14, and supplies the left and right pushers 10 with grease. In the case of pin 8, by injecting grease into the grease nipple 20, the passage 19,
It reaches the outer peripheral surface of the pin 8 through the annular groove 15, the passage 24, the annular groove 22, and the hole 23. Although the path for injecting grease to the pin 8 side is a little long, this is not a problem because the grease injection device can inject grease at high pressure, and the annular groove 15 provided in the collar 13 is
It is inserted tightly into the hole of arm 3,
Since there is no gap to the same degree as the fit between the pushbutton and the pushbutton hole, there is no leakage from this part. In this way, from grease nipple 20 to pin 8
The passage 19, the annular groove 15, the passage 24, the annular groove 22, and the hole 23 that exist up to the point form a complete flow path, and the grease will not leak to other places during greasing. , it is possible to perform lubrication in exactly the same way as when a grease nipple is attached directly to the pin 8.

Effects of the invention As mentioned above, this invention is useful for installing grease nipples in cases where the bearings are arranged close together and move, and one of the bearings is hidden behind the side plate. In cases where it is necessary to make a hole in the side plate, in addition to the annular groove for passing the pin fitted into the pusher of the other bearing, a separate annular groove for lubricating the other pin should be provided. Since this is provided, there is no need to forcibly drill a hole for a grease nipple in the side plate in order to supply grease to a pin in a hidden position, and a decrease in the strength of the side plate can be prevented. In addition, since there is no need to directly drill a hole for greasing the pin, there is no need to increase the pin diameter or improve the material to prevent the strength of the pin from decreasing, which can reduce costs. It can be prevented. In addition, if a hole is drilled in the side plate to install a grease nipple, the hole must be large to cover the entire area if the bearing moves, which greatly reduces the strength. To prevent this, if the grease nipple is visible only at a certain position, it will be difficult and nerve-wracking to know when to stop, and it will also be difficult to wipe off the dirt that has adhered to the grease nipple after greasing. According to the present invention, such a problem does not occur, so it is very convenient.

[Brief explanation of drawings]

Figure 1 is a front view of the device actually used in this invention, Figure 2 is a sectional view taken along line A-A in Figure 1, Figure 3 is an enlarged view of part B in Figure 2, and Figure 4. is a sectional view taken along the line C-C in Fig. 3, Fig. 5 is a view taken from D in Fig. 2, Fig. 6 is an enlarged view of section E in Fig. 2, and Fig. 7 is a sectional view of the conventional one. . 1...Support body, 2...Pin, 3...Arm, 7
...Connecting plate, 8...Pin, 10...Pushy, 1
3... Collar, 14... Annular groove, 15... Annular groove, 16... Hole, 17... Passage, 18... Grease nipple, 19... Passage, 20... Grease nipple, 21... Push , 22... annular groove, 2
4...Aisle.

Claims (1)

[Scope of utility model registration request] In devices where pins are inserted into one member and separate members are connected to each pin, two or more annular grooves are provided on the outer periphery of the bearing bush of one pin, and grease is passed through separate conductive paths. One of the annular grooves is provided with a diametrical hole so that the pin can be lubricated, and the other annular groove is connected to the other pin through a conductive passage provided in the member. Greasing distribution collar between bearings, which is passed through the annular groove of the bearing bush.