JPS6150197B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grease supply head for a grease applicator for oil seals and bearings, and is capable of applying grease to the inner circumferential surface of an oil seal located at a lower position using a grease supply head located at an upper position. It is something.

Grease applicators that apply grease to the inner and outer circumferences of oil seals are equipped with a supply rod with a pair of grease discharge ports at the tip of the supply head, and the grease is injected from the discharge ports while rotating (circling) the supply rod by 180 degrees. Grease is applied to the inner and outer peripheries of the seal. The disadvantage of this device is that if the inner diameter of the oil seal that fits in the lower side of the bearing hole is smaller than the inner diameter of the bearing that fits in the upper bearing hole, a pair of grease supply rods must be inserted from above to seal the oil seal. cannot face the inner circumferential surface of the For this purpose, another grease supply head is disposed below the bearing hole, and a pair of supply rods extending upward from the head are opposed to the inner peripheral surface of the oil seal to apply grease. This method of applying grease not only requires two sets of grease applicators, but also requires that the bearing hole be penetrated and that there is no fitting object with a small inner diameter below the oil seal. .

The present invention was made in view of the drawbacks of the above-mentioned conventional devices. For example, the tip shape of a pair of supply rods is
A grease discharge port is provided at the tip of this protrusion, so that the tip of the protrusion opens and closes when each supply rod is rotated, and when it goes into and out of the bearing hole, the tip of the protrusion closes, discharging grease to the oil seal. By placing the protruding tip facing the inner surface of the seal during application, even if a small-diameter fitting is fitted at the entrance of the bearing hole, it will be placed above the inner circumferential surface of a large oil seal, etc. inside the bearing hole. We succeeded in applying grease using the supply rod of the grease supply head.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The grease supply head of the present invention will be explained below with reference to embodiments of the drawings. FIG. 1 is a schematic diagram of an automatic grease feeder. On the front of this feeder K, there are shown the grease feed head GH ₂ of the present invention as well as other feed heads GH _1.
A double-headed grease applicator GK with
The piston rod 3a of the lifting cylinder 3 moves up and down. The upper and lower limit positions are detected by the detection ring 4 on the lifting platform 10 pushing limit switches (not shown) arranged above and below. Further, a balance weight (not shown) is suspended from the lifting platform 10 via two chains 5 and 6, and is moved up and down with a light driving force. The grease supply head GH ₁ on the left side applies grease to the outer peripheral surface of the oil seal C ₁ fitted to the shaft portion 11a of the workpiece 11 placed on the pallet P, and the grease supply head GH 1 on the right side GH ₂ applies and injects grease to the oil seal C ₂ fitted into the bearing hole 12a of the workpiece 12 and the bearing B ₁ above this. That is, in FIGS. 1 and 2, each head GH ₁ and GH ₂ is connected to a pair of grease supply rods 13 and 1.
4, 15, and 16 hang down, and discharge ports 13a, 14a, 15a, and 16a opened at the lower ends face each seal C ₁ and C ₂ , and are moved back and forth by the piston rod 19 of the forward/backward cylinder 20. Easy rod 1
7,18 allows you to rotate 180 degrees clockwise or counterclockwise. The amount of 180° rotation of each head GH ₁ and GH ₂ above is:
As shown in FIG. 2, detection pieces 22 and 23 attached to the top end of the rotating shaft 21 of the head GH ₁ are detected by a limit switch (not shown). GP ₁ to _{GP 3} are grease supply pumps (plunger pumps), and each discharge pipe P ₁
~ _P3 connects each head _GH1 , _GH2 via switching valves _V1 to _V3 .
or connected to a grease source. Therefore, when the rack rods 17 and 18 move forward by the drive of the forward and backward cylinder 20, each plate cam (direct-acting cam) 24, 25, 2
6 is also moved forward to push up the operating rods 27, 28, 29 connected to the plungers of each pump, and grease is injected from the discharge port of each head in synchronization with the amount of rotation of the head (circular angle of the supply rod). (Overview explained above) Next, the grease supply head, which is the main part of the present invention, will be explained.
Explaining GH ₂ and its peripheral configuration. 30 is lifting platform 1
It is a frame attached to the front of 0, and a forward/retractable cylinder 20 with a piston rod 19 facing forward is fitted in the center.
Rack rods 17 and 18 are fitted and supported on the left and right sides. The rack rods 17 and 18 are connected to the piston rod 19 by a connecting plate 31, and the gear teeth 17a and 18a are engaged with the rotation shafts 21 of the heads GH ₁ and GH ₂ and the pinions 33 and 34 of the rotation cylinder 32, respectively. ing. First, the grease supply head GH ₁ provided at the lower end (tip) of the rotating shaft 21 is mounted so as to face the outer periphery of a cylinder 36 that has two grease supply rods 13 and 14 fixed to the lower end of the rotating shaft 21. With the conical stop 37 attached to the center of the lower end of the cylinder lightly touching the shaft 11a of the workpiece 11, the discharge ports 13a and 14a opened inside the tips of the supply rods 13 and 14 are connected to the oil seal _C1 . It is in close contact with the outer surface. 38 is a ring,
The grease supply pump GP ₁ is locked to the left end of an inverted T rod 39 attached to the lower surface of the frame 30 so as not to rotate.
It is connected to pipe P ₁ from. Then, the pump
Grease is pumped from GP ₁ to each supply rod 13, 1.
The oil is injected from the discharge ports 13a and 14a through the oil holes a and a of No. 4.

Subsequently, the grease supply head GH ₂ of the present invention provided in the rotating cylinder 32 has two grease supply rods 15,
16 to the lower end surface 32a of the rotating cylinder 32, the bolt 43,
Bearing holes 40a, 40 of the supporting cylinder 40 connected at 43
b is rotatably inserted through it. This supply rod 1
The upper end flanges 15e and 16e of the rotating cylinder 3
Two engaging parts 41 are recessed in the lower end of the piston rod 41a of the opening/closing cylinder 41 that is inserted into the opening/closing cylinder 41 from above.
b, 41b so that they can be rotated individually. The opening/closing cylinder 41 is mounted on the top of the rotating cylinder 32 with bolts 8..., and the piston rod 41
a is the members 34, 40, 1 as the rack rod 18 advances and retreats.
The vertical stroke is controlled by limit switches LS ₁ and LS ₂ which are rotated from side to side via switches 5 and 16 and pushed by a detection ring 42 . 45 is a guide tube connected to the lower end of the support tube 40 with a bolt 44;
The supply rods 15 and 16 are rotatably inserted into the bearing holes 45a and 45b.
The flange 45c of the guide tube 45 has fourth and fifth
As shown in the figure, a horizontal hole 45' is perpendicular to the two bearing holes 45a and 45b and extends between the holes 45a and 45b.
hole 45c is opened from one side (the right side in the figure), and the inner part of this hole 45c is a thin wall 45d, so that the hole 45 on both sides
It opens at a and 45b. Therefore, the horizontal hole 45'
The pin 46 press-fitted into each bearing hole 45a, 4
Looking into 5b. The supply rods 15, 16 have right-up spiral grooves 15c, 16c with a rotation angle (twist angle) of approximately 120 degrees formed in the contact surfaces with the pin 46, and the pin 46 engages with these spiral grooves 15c, 16c. Therefore, when the piston rod 41a of the opening/closing cylinder 41 is at the top dead center,
As shown in FIGS. 2, 3, and 6, L-shaped protruding tips 15b, 16b provided at the lower ends of each supply rod 15, 16 face the inner surface of the oil seal _C2 in the radial direction. Furthermore, when the piston rod 41a is at the bottom dead center, the protruding tips 15b, 16b of the supply rods 15, 16, which descend with the same stroke, move counterclockwise when viewed from below, as shown by the chain line in FIG. 6 and in FIG. It rotates about 120 degrees and is brought to the inside of the small diameter portion 45e of the guide tube 45. Reference numeral 47 denotes a ring body that fits into the small diameter portion 40c of the support cylinder 40, and is engaged with the right end of the inverted T rod 39 so as not to rotate, and is connected to the pipes P ₂ and P ₃ from the grease supply pumps GP ₂ and GP ₃ . tied together. 47a is the small diameter portion 4
A groove ring recessed on the inner surface of the ring body 47 in contact with 0c,
It is connected to the pipe P ₂ and also connected from the communication hole b to groove rings c and c recessed in the outer periphery of each supply rod 15 and 16 located at the top dead center. The groove rings c and c pass through the oil holes d and d in the supply rods 15 and 16 to the discharge port 1.
5a and 16a. Therefore, the second
As shown in FIG. 3, the grease fed under pressure from the pump GP ₂ passes through the oil holes d and d of the supply rods 15 and 16, and is injected from the discharge ports 15a and 16a toward the inner surface of the oil seal _C2 . On the other hand, the groove ring 47b is the pipe P ₃
and the communication hole of the small diameter portion 40c.
b', b' are connected to the discharge ports 48a, 48a of the discharge ring 48 through communication holes e, e of the guide cylinder 45. The discharge ring 48 is fixed to the lower surface of the flange of the guide tube 45 with bolts 49, and its outer diameter is set smaller than the inner diameter of the tip of the bearing hole 12a of the workpiece 12. Thus, the discharge ring 48 is connected to the bearing hole 12.
The upper bearing B 1 fitted into this hole has a discharge port 4 on the upper surface of the upper bearing B ₁ .
8a and 48a can face each other. Reference numeral 50 denotes a stop ring that fits into the flange 45c of the guide tube 45 and is received by the discharge ring 48 so as not to fall off. This stop ring 50 has a thrust bearing 51 fitted on the lower surface of the ring body 47 and a spring 5.
2... are in contact with each other via... 53 is a thrust bearing fitted to the lower surface of the flange of the supporting cylinder 40, and the ring body 4
It is in contact with the upper surface of 7. When the respective grease supply heads GH ₁ and GH ₂ are lowered by the lifting cylinder 3, the heads reach the bottom dead center of the piston rod 3a.
The stop 37 of GH ₁ lightly contacts the shaft portion 11a,
The stop ring 50 of head GH ₂ is in the bearing hole 12a.
It will come into contact with the tip edge of the.

The grease supply head of the present invention is constructed as described above, and its operation will be explained below. As shown in Figures 1 and 2, two works 11 and 12 are fixed on a pallet P, and before applying and injecting grease to the oil seals C ₁ and C ₂ and the bearing B ₁ , an opening/closing cylinder is Grease supply rod 1 with 41
5 and 16 as shown in FIG.
The guide tube 45 is closed inward from the small diameter portion 45e as shown by the chain line in the figure. Thereafter, the grease applicator GK placed on the lifting table 10 is lowered to directly above the works 11 and 12 under the operation of the lifting cylinder 3. As a result, the supply head GH ₁ has the discharge ports 13a and 14a formed at the lower ends (tips) of the pair of grease supply rods 13 and 14 in a state where the stop 37 is in light contact with the shaft portion 11a as shown in FIG. Closely facing the outer peripheral surface of oil seal _C1 . The other supply head GH ₂ connects the small diameter portion 45e of the guide tube 45 of the closed supply rods 15, 16 to 2 as shown by the chain line in FIG.
The stop ring 50 is inserted into the two bearings B ₁ and B ₂ , and the stop ring 50 is stopped by lightly abutting the tip edge of the bearing hole 12a. After that, when the piston rod 41a is raised, each supply rod 15, 16 rotates about 120 degrees in the direction of the solid line, and the protruding tips 15b, 16b move to the second,
It opens as shown in Figures 3 and 6, and its discharge ports 15a and 16
a to face the inner surface of oil seal _C2 . still,
Discharge port 48 of discharge ring 48 for bearing B ₁
a, 48a automatically face the upper side of the bearing when the head GH ₂ is lowered. Subsequently, when the piston rod 19 of the forward/backward cylinder 20 starts moving forward, the rack rods 17, 18 and each plate cam 24
~26 will follow at once. Therefore, each rack rod 1
The rotation shafts 21 and 32 are rotated clockwise and counterclockwise via pinions 33 and 34 that mesh with the supply rods 13, 14 and 15 of the heads GH ₁ and GH ₂ provided at their lower ends. 16 starts rotating (circling) along the seals C ₁ and C ₂ . At the same time, the plate cams 24 to 26 push up the plungers of the supply pumps GP ₁ to GP ₃ , and the switching valve V ₁ is activated at an earlier stage.
~V ₃ each pump has piping P ₁ ~ _{P 3} each discharge port 13
a, 14a, 15a, 16a, 48a, and 48a, the grease pumped from each pump GP ₁ to GP ₃ is evenly injected from each discharge port. Thus, when the piston rod 19 of the cylinder 20 reaches the most advanced position, each of the supply rods 13 to 16 reaches the 180° position.
As it rotates, the plunger of each pump is pushed up by the inclined surface of plate cams 24 to 26, and each seal
Apply and inject grease evenly onto the entire inner and outer circumferential surfaces of C ₁ and C ₂ and the entire upper circumferential surface of bearing B ₁ . When the piston rod 19 of the advancing/retracting cylinder 20 reaches the front end (stroke end), the application of grease to each seal C ₁ , C ₂ , B ₁ is completed, and the opening/closing cylinder 4
1 piston rod 41a descends and this supply rod 1
5 and 16, the tips 15b and 16b are closed. Thereafter, the lifting cylinder 3 is operated to raise the lifting table 10 and move the grease applicator GK upward. During the above-mentioned movement, the piston rod 19 of the advancing/retracting cylinder 20 is retracted, and each supply rod 13 to 16 rotates in reverse and returns to the initial state, and each pump GP ₁ to GP ₃ is activated by the operation of the switching valves V ₁ to V ₃ . The cylinders are connected to a grease supply source, and as the plate cams 24 to 26 retreat, grease is actively press-filled into each cylinder from the grease supply source. During the above process, a new pallet is inserted into the automatic grease feeder K, and the above operation is repeated thereafter.

What is noteworthy about the above operation is that one grease supply head GH ₂ injects grease into the bearing B ₁ and thereby applies grease to the inner peripheral surface of the large inner diameter oil seal C ₂ located at the lower position, which is positioned above the workpiece. This can be done with a single grease supply head.

The device of the present invention is not limited to the one embodiment described above, and design changes can be made within the gist. For example, the grease supply head may be a single-head type only for the GH ₂ of the present invention. Further, the pair of grease supply rods 13, 14 and 15, 16 can also be increased or decreased as necessary, and the rotation angle can be changed accordingly. That is, at least one grease supply rod is sufficient. Furthermore, palette P
If it is made into an elevating type, the elevating platform 1 of the grease supply machine K
0 can be omitted. Furthermore, the grease supply outlet of the bearing B ₁ may be omitted from the grease supply head GH ₂ , and the opening/closing members of the grease supply rods 15 and 16 are configured with a spiral groove and an opening/closing cylinder, so the upper end flange of each supply rod may be omitted. 15e and 16e may be gears, and a gear at the lower end of the rotating shaft of the rotary solenoid may be meshed with the gears so that the supply rods 15 and 16 are rotated without vertical movement due to rotation of the rotary solenoid. In the above configuration, it is preferable to configure a rotary valve between the groove rings c, c and the communicating hole b. Further, the supporting cylinder 40 and the guide cylinder 45 may be made into one piece.

According to the present invention, a supporting cylinder is connected to the lower end of the rotary cylinder which is rotated by a driving member such as a rack rod, and at least one grease is supplied to a bearing hole extending through the supporting cylinder. A rod is inserted through the rod so that the lower end thereof becomes an L-shaped protruding tip, and the annular body, which is fitted to the support tube so as not to rotate, is connected to a grease supply source, and the grease supply rod is connected through the support tube. connected to the discharge port at the protruding tip through an oil hole bored in the supply rod, and an opening/closing member for rotating the supply rod is provided at the upper end of the supply rod;
When the supply rod enters and retracts from the workpiece bearing hole, the protruding tip closes, and when applying grease to the oil seal in the bearing hole, the protruding tip faces the inner surface of the oil seal. There is no need to provide a grease supply head, and even if a fitting with a small inner diameter is fitted to the upper entrance of the workpiece bearing hole, it can be placed above the workpiece against the inner peripheral surface of a large oil seal, etc. in the bearing hole. There is an excellent effect that the grease can be applied by the supply rod of one grease supply head.

[Brief explanation of the drawing]

FIG. 1 is a front view of the grease supply machine, FIG. 2 is a partially cutaway sectional view of the grease supply head of the present invention, and FIG. 3 is an enlarged partial view of the grease supply head of the present invention.
Figure 4 is a sectional view taken along line A-A in Figure 3, and Figure 5 is a cross-sectional view of Figure 3.
6 is a bottom end view of the grease supply head, FIG. 7 is a developed view of the spiral cam groove, and FIG. 8 is a sectional view showing the operating state of the grease supply head. 12...Work, 12a...Bearing hole, 15.1
6...Grease supply rod, 15a/16a...Discharge port, 15/16b...Protruding tip, 15c/16c
...Spiral groove, 17/18...Rack rod, 19/1
4a... Piston rod, 20... Advance/retreat cylinder, 3
0... Frame body, 32... Rotating tube, 34... Pinion, 40... Supporting tube, 40a/40b... Bearing hole, 41... Opening/closing cylinder, 45... Guide tube, 4
5a/45b...Bearing hole, 46...Pin, 47...
...Ring body, d...Oil hole, C ₁ /C ₂ ...Oil seal, B ₁ /B ₂ ...Bearing, GH ₁ /GH ₂ ...Grease supply head, GK...Grease applicator, K
...Grease supply machine.

Claims (1)

[Claims] 1. A supporting tube 40 is provided in succession at the lower end of the rotary tube 32 which is rotated by driving members such as the rack rods 17, 18, and at least one bearing hole 40a, 40b is provided in the supporting tube 40. Grease supply rods 15, 16 above
The lower end shape is formed into an L-shaped protruding tip, and the annular body fitted to the support tube 40 so as not to rotate is connected to a grease supply source, and the support tube 40
The grease supply rods 15, 16 are connected to the discharge ports 15a, 16a at their protruding tips through the oil holes d drilled in the grease supply rods 15, 16, and an opening/closing member for rotating the grease supply rods 15, 16 is provided at the upper end of the grease supply rods 15, 16. The feature is that the protruding tip is closed when the grease supply rod goes in and out of the bearing hole, and the protruding tip is opposed to the inner surface of the oil seals C ₁ and C ₂ when applying grease to the oil seals C ₁ and C ₂ inside the bearing hole. Grease supply head for grease applicator.