JPS6137917Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a grease applicator for oil seals, bearings, etc. that is used by being attached to an automatic assembly machine, etc., and is intended to equalize the amount of grease applied to the oil seals, etc.

Grease applicators that apply grease to the inner and outer circumferences of oil seals are equipped with a pair of grease discharge ports at the tip of the supply head, and as the supply head is rotated 180 degrees, the grease injected from the discharge ports is applied to the seal. It is applied to the inner and outer circumference. The disadvantage of this device is that the seal is coated with the grease that is injected from the discharge port regardless of the amount of rotation of the supply head, so even if the supply head stops mid-rotation, the grease will not be discharged from the discharge port. As a result, uniform application of grease to the inner and outer peripheries of the seal cannot be expected. This is because there is no synchronism between the grease discharge and the rotational movement of the supply head.

The present invention was developed in view of the above-mentioned drawbacks of conventional devices. By completely synchronizing the amount of grease injected from a pair of discharge ports with the rotational movement of this supply head, the grease is evenly applied to the seal. We have succeeded in providing a device for evenly applying grease.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The grease applicator of the present invention will be described below with reference to embodiments of the drawings. 1 to 3 are schematic diagrams of an automatic grease supply machine. The grease application device GK of the present invention is provided on the front side of the supply machine K, and this is connected to two guide bars 1 and 2 by a lifting platform 10. It is moved up and down by the piston rod _3a of the lifting cylinder 3. The upper limit position and the lower limit position are detected when limit switches LS ₁ and LS ₂ placed at upper and lower positions are pushed by detection rings 4 and 5 on the lifting platform 10 . The above grease applicator GK has two sets of supply heads.
GH ₁ and GH ₂ , one head GH ₁ applies grease to the outer circumferential surface of the oil seal C ₁ fitted to the shaft 11 _a of the work 11 placed on the pallet P, and the other head The head GH ₂ applies and injects grease to the oil seal C ₂ fitted into the bearing hole 12 _a of the workpiece 12 and the bearing B ₁ . The grease supply heads GH ₁ , GH ₂ hang down a pair of grease supply rods 13 , 14 , 15 , 16 , and the discharge ports opened at the lower ends thereof face the seals C ₁ , C ₂ , and the forward and backward cylinders ( clockwise and counterclockwise with the rack rods 17 and 18, which move back and forth using the
Can be rotated 180° (see below). Each head GH ₁ , GH ₂
The amount of rotation of 180° is determined by the detection pieces 19 _a and 19 _b attached to the top end of the rotation shaft 20 of the head GH ₁ as shown in Fig. 3.
is detected by two limit switches _LS3 and _LS4 . GP ₁ to _{GP 3} are grease supply pumps (plunger pumps), and each discharge pipe P ₁ to _{P 3} is a switching valve.
It is connected to each head GH ₁ , GH ₂ or to the supply source via V ₁ to _{V 3} . Then, with the forward and backward cylinder, it is easy to move the rod 1.
When the pumps 7 and 18 move forward, the plate cams (straight-moving cams) 21, 22, and 23 are also moved forward, pushing up the operating rods 24, 25, and 26 connected to the plungers of each pump, and the discharge ports of each head are moved forward. Grease is injected in synchronization with the amount of rotation of the head. (Summary explained above) Next, each head GH ₁ and GH ₂ which is the main part of this invention
A grease applicator having an even grease discharging function that supplies grease to each discharge port in synchronization with the amount of rotation will be described in detail with reference to FIG. 4 and subsequent figures.

First, the internal structure of each supply head GH ₁ and GH ₂ will be explained with reference to FIG. Reference numeral 30 denotes a frame attached to the front surface of the lifting platform 10, and a forward/retractable cylinder 31 with a piston rod _31a facing forward is fitted in the center thereof, and rack rods 17 and 18 are attached to the left and right sides of this frame. 31 is fitted and supported parallel to _a . The rack rods 17 and 18 are connected to the piston rod 3 by means of a connecting plate 32.
_1a , and each gear tooth _17a , _18a is connected to each head.
It is meshed with the rotating shafts 20 of GH ₁ and GH ₂ and the pinions 34 and 35 of the rotating cylinder 33. With this, when the piston rod _31a moves forward, each rotation shaft 20, 33 can be rotated clockwise or counterclockwise as shown in FIG.
Grease supply head provided at the lower end of the rotating shaft 20
In the GH ₁ , the two grease supply rods 13 and 14 are mounted to face the outer periphery of a cylinder 36 fixed to the lower end of the rotating shaft 20, and a conical stop 37 attached to the center of the lower end of the cylinder is attached to the workpiece 11. Discharges 13 _{a and} 14 a opened inside the tips of the supply rods 13 and 14 are in close contact with the outer circumferential surface of the oil seal C ₁ while lightly abutting the shaft portion 11 _a . 38 is a ring body, which is locked to the left end of an inverted T rod 39 attached to the bottom surface of the frame 30 so as not to rotate, and connected to the piping from the grease supply pump GP _1.
Connected to P ₁ . Therefore, the grease pumped from the pump GP ₁ is supplied to the through holes a and 14 of each supply rod 13 and 14, respectively.
a and is injected from the discharge ports 13 _a and 14 _a .
Next, the grease supply head GH ₂ provided at the lower end of the rotary cylinder 33 has two grease supply rods 15 and 16 connected to the lower end surface of the rotary cylinder 33 through bearing holes 40 _a and 40 _b of a supporting cylinder 40 . The upper ends of the piston rods 41 a of the opening/closing cylinder 41 are rotatably inserted into the piston rods 41 _a of the opening/closing cylinder 41 so as to be rotatable therethrough.
The opposing surfaces of the supply rods 15 and 16 have a rotation angle of approximately 120 mm.
Helical grooves _15a and _16a of 15° are provided, and this is the support tube 4.
It engages with pin 42 which is fixed at zero. Then,
When the piston rod 41 _a is at the top dead center, the L-shaped tips 15 _b and 16 _b of each supply rod 15 and 16 are connected to the discharge port 1 as shown in the figure.
5 _c and 16 _c face the inner surface of the seal C ₂ in the bearing hole 12 a, and as the piston rod 41 _a descends to the bottom dead center, each supply rod 15 and 16 rotates approximately 120 degrees clockwise, and the L
The mold tips 15 _b and 16 _b are moved toward the center and can freely come out from inside the bearing hole 12 _a as the lifting platform 10 rises. Reference numeral 43 denotes a ring body that fits into the small diameter part of the support cylinder 40, and is locked to the right end of the inverted T rod 39 so as not to rotate, and is connected to the piping from the grease supply pumps GP ₂ and GP ₃ .
Connected to P ₂ and P ₃ . Grease is pumped from the pump GP ₂ through the through holes b and b of each supply rod 15 and 16, and is injected from the discharge ports 15 _c and 16 _c toward the inner surface of the oil seal _. The pressurized grease is injected into the upper bearing _B1 through the through holes c and c.

Next, the configuration of the grease supply pumps GP ₁ to GP ₃ and their drive system, which are the core of the present invention, will be explained with reference to FIGS. 6 and 7. The drive system of the pumps GP ₁ to _{GP 3} includes the grease supply heads GH 1 and GH ₁ as explained in FIGS. 4 and 5.
The forward/backward cylinder 31, which is the driving cylinder of the GH ₂ , is used. 44 is a flat plate, which is a piston rod 31 _a
The front end side is screwed onto the upper back surface of the connecting plate 32 that communicates between the tip of the rod and each rack rod 17, 18 with bolts 45..., and the lower surface is screwed onto the sliding piece 46 screwed onto the top surface of the mounting tube 46 of the cylinder 31. Supported. Thus, the flat plate 44 follows the forward and backward movement of the piston rod _31a , and its stroke is from the position stopped by the stop pin 47 shown in FIG. 6 to the most advanced position of the piston rod _31a , and both stroke ends is the detection piece 19 attached to the rotating shaft 20 shown in FIG.
_a and 19 _b are sensed by limit switches LS ₃ and LS ₄ . The upper surface of the flat plate 44 is provided with grooves 44 _a where the plate cams 21 to 23 are formed, as shown in FIGS. 3 and 6.
The front end of each plate cam is pivotally supported by a pin 48. Further, an adjuster screw 49 for height adjustment is screwed onto the rear end of each plate cam, and each plate cam 21
~23 The inclination angle of the upper surfaces 21 _a ~ 23 _a can be finely adjusted. The three grease supply pumps GP ₁ to _{GP 3} are arranged in parallel on the back of the portal frame 50 fixed to the front of the frame 30, and are connected to the operating rods 24, 25, 26 connected to the lower ends of the plungers 51... roller 5
2... is the upper surface (slanted surface) _{21 a} of the plate cams 21 to 23
~23 It is posted on _a . Therefore, advance/retreat cylinder 3
When the piston rod _31a of No. 1 is in the retracted position as shown in FIG. 6, the rollers 52 of each pump GP ₁ to GP ₃ ...
is on the lower side of plate cams 21 to 23, and each pump
There are switching valves in the cylinders 53 to 55 of GP ₁ to GP ₃ .
Grease g pumped under high pressure from a grease supply source is filled through V ₁ to _{V 3} . Further, the plate cam also moves forward in synchronization with the forward movement of the piston rod _31a , and the plungers 51... are raised to a high position on the inclined surface _21a shown in FIG. 7 at a constant speed in synchronization with the movement of the plate cam. At this time, the grease g is completely synchronized with the stroke of the cylinder 31 (rotation angle of the supply heads GH ₁ and GH ₂ ) from each pump GP ₁ to GP ₃ to the pipes P ₁ to P 3 .
The structure is such that the cylinder 31 is uniformly discharged to P ₃ (when the cylinder 31 moves at a constant speed).

The present invention is constructed as described above and operates as described below. As shown in Figs. 1 and 4, 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 , a lifting platform is 10
The grease applicator GK placed on the machine is lowered to directly above the works 11 and 12 under the operation of the lifting cylinder 3. The supply head GH ₁ is now connected to the discharge port 13 formed at the lower end of the pair of supply rods 13 and 14.
_a , _14a are close to and face the outer peripheral surface of the oil seal _C1 . In addition, the supply head GH ₂ is connected to the opening/closing cylinder 4.
1, lower the piston rod _41a and lower the supply rod 1 at the lower end.
5, ₁₆ are inserted into the bearing hole _12a with the tips 15b, _16b closed, and then when the piston rod 41a is raised, the tips _15b , 16 of each supply rod 15, ₁₆ are inserted into the bearing hole 12a.
_16b is opened to make the discharge ports _15c and _16c face the inner peripheral surface of the oil seal _C2 . Following this, the fourth
As shown in Figures 6 to 6, when pressure fluid is supplied from the piping _P5 to the advance/retreat cylinder 31 and the piston rod _31a begins to move forward, the rack rods 17 and 18 and the plate cams 21 to 23 are driven simultaneously. Therefore, the pinions 34, 35 meshing with the respective rack rods 17, 18
The rotating shafts 20 and 33 are connected to the clock as shown in FIG.
The supply rods 13, 14 and 15, 16 of each head GH ₁ , GH ₂ are rotated counterclockwise and provided at the lower end thereof.
starts rotating (circling) along the seals C ₁ and C ₂ , and the discharge port c also rotates together. At the same time, the plate cams 21 to 23 push up the plungers 51 of the supply pumps GP ₁ to GP ₃ , and at an earlier stage, the switching valves V ₁ to _{V 3} move each pump to each discharge port 13 in the piping P ₁ to P ₃ . _a , _14a , _15c , _16c , c, and c, the grease g pumped from each pump _GP1 to _GP13 is evenly injected from each discharge port. That is, grease g is supplied from each pump GP ₁ to _{GP 13} in complete synchronization with the rotational speed of each supply head GH ₁ and GH ₂ .
is pumped to each outlet, so the oil seal
The amount of grease applied and injected onto the circumferential surfaces of C ₁ , C ₂ and bearing B ₁ is controlled to be equal. As shown in FIG. 5, when the piston rod _31a of the cylinder 31 reaches the most advanced position, each of the supply rods 13 to 16
As it rotates 180 degrees, the plungers 51 of each pump are pushed up by the inclined surfaces of the plate cams 21 and 23 as shown in Fig. 7, and the entire inner and outer peripheral surfaces of each seal C ₁ and C _{2 and} the upper part of the bearing B Apply and inject grease G evenly onto the circumferential surface. In order to increase the amount of grease applied, the slopes of the inclined surfaces 21a _to 23a of the plate cams 21 to ₂₃ can be increased by adjusting the adjusting screw 49 as shown by the chain line in FIG. When the piston rod _31a of the advancing/retracting cylinder 31 reaches the front end (stroke end), the application of grease to each seal C ₁ , C ₂ , B ₁ is finished, and the piston rod 41 a of the opening/closing cylinder 41 is lowered to remove the supply rod. 1
Close the tips 15 _b and 16 _b of 5 and 16. After this,
The lifting cylinder 3 is operated to raise the lifting table 10 and move the grease application device upward. During the above movement, the piston rod _31a of the advancing/retracting cylinder 31 is retracted and each supply rod 13 to 16 rotates in reverse and returns to the initial state, and each pump GP ₁ is activated by the operation of the switching valves V ₁ to V ₃ .
The cylinders 53 of ~GP ₃ are connected to the grease supply source, and as the plate cams 21 to 23 retreat, grease g is actively press-filled into each cylinder 53 from the grease supply source. During the above process, a new pallet is carried into the automatic grease supply machine K, and the above operation is repeated thereafter.

The grease applicator of the present invention is not limited to the one embodiment described above, and design changes can be made within the scope of the invention. For example, the grease supply head may be of a single head type, or may include a pair of supply rods 13, 14 and 15, 1.
6 can also be increased or decreased as necessary, and the rotation angle is changed accordingly. That is, at least one grease supply rod is sufficient. Furthermore, if the pallet P is of an elevating type, the elevating table 10 of the grease supply machine K can be omitted.

According to the present invention, the rotation drive source of the grease supply rod and the drive source of the grease supply pump that pressure-feeds grease to the discharge port of the grease supply rod are connected to one driving cylinder, and the grease supply pump has a variable discharge amount. Since the operation of the grease supply rod and the grease supply pump is completely synchronized, the amount of grease injected from the discharge port of the grease supply rod is controlled by the rotational movement of this supply head. Even if the supply head temporarily stops mid-rotation, the grease can be applied evenly to seals, etc., and the amount of grease applied can also be adjusted freely.

[Brief explanation of the drawing]

Figure 1 is a front view of the grease supply machine, Figure 2 is a left side view, Figure 3 is a plan view, Figure 4 is a partially cutaway enlarged sectional view of the grease supply head, and Figure 5 is A of Figure 4. - A sectional view, FIG. 6 is a sectional view showing the grease supply pump and its drive system, and FIG. 7 is a partial sectional view showing the operating state of the grease supply pump. K...Grease supply machine, GK...Grease applicator, GH ₁ , GH ₂ ...Grease supply head, 13
~16...Grease supply rod, 13 _a , 14 _a , 15
_c , 16 _c , c...discharge port, g...grease, GP ₁
~ GP ₃ ... Grease supply pump, C ₁ , C ₂ ... Oil seal, 21 - 23 ... Plate cam, 21 _a - 23 _a
... Inclined surface, 31 ... Advance/retreat cylinder of driving cylinder, 31 _a ... Piston rod, P ₁ to P ₆ ... Piping,
_V1 to _V3 ...Switching valve.

Claims (1)

[Scope of utility model registration request] At least one grease supply rod 13, 14, 15, 1 for the grease supply heads GH ₁ , GH ₂
6 along the circumference of the object to be coated and injects grease g from its discharge port.
At GK, grease supply rods 13, 14, 1
Rotation drive sources 5 and 16 and grease supply rods 13 and 1
The drive sources of the grease supply pumps GP ₁ , GP ₂ , GP ₃ that force-feed the grease g to the discharge ports 4, 15, 16 are connected to one driving cylinder 31, and the grease supply pumps GP ₁ , GP ₂ , GP ₃ are connected to one driving cylinder 31. The grease supply rods 13, 14, 15, 16 are driven by plate cams 21, 22, 23 whose discharge amount can be changed.
A grease applicator characterized in that the operation of the pump and the grease supply pumps GP ₁ , GP ₂ , and GP ₃ are completely synchronized.