US3119461A

US3119461A - Scotch-yoke lubricator

Info

Publication number: US3119461A
Application number: US157529A
Authority: US
Inventors: Sherwood G Enders
Original assignee: Black and Decker Manufacturing Co
Current assignee: Black and Decker Corp
Priority date: 1961-12-06
Filing date: 1961-12-06
Publication date: 1964-01-28
Anticipated expiration: 1981-01-28

Description

Jan. 28, 1964 s. G. ENDERS SCOTCH-YOXE LUBRICATOR Filed Dec. 6, 1961 FIG.3

IIIIIIIIIIIIII/fllfl FIG. 2

SHERWOOD G. ENDERS INVENTOR.

ATTORNEY United States Patent 3,119,461 SCOTCH-YOKE LUBRICATOR Sherwood G. Enders, Baltimore, Md, assignor to The Black and Decker Manufacturing Company, Towson, Md., a corporation of Maryland Filed Dec. 6, 1961, Ser. No. 157,529 7 Claims. (Cl. 184-5) The present invention relates to a Scotch-yoke lubricatcr, and more particularly, to a Scotch-yoke mechanism including an eccentric and further including means to allow the eccentric to engage a stationary lubricant applicator at one end of travel of the reciprocating yoke.

It is an object of the present invention to provide a Scotch-yoke mechanism including a reciprocating yoke having a pair of parallel side walls, wherein one of the side walls has an opening to allow the tip of a stationary lubricant applicator to protrude therethrough to engage the eccentric at one end of travel of the reciprocating yoke. v

It is another object of the present invention to provide a Scotch-yoke lubricator wherein the tip of a stationary lubricant applicator is received Within a slot formed in a. side Wall of the yoke immediately previous to the end of travel of the yoke, whereby the applicator is guided within the slot for subsequent engagement with the eccentric at the end of tra ml of the reciprocating yoke.

These and other objects of the present invention will become apparent from a review of the vfollowing specification, taken in conjunction with the enclosed drawings, in which:

FIGURES :1 through 3 are sequence views showing successive stages in the operation of the present invention, wherein the reciprocating yoke has an opening in one of its side walls to receive the tip of a stationary lubricant applicator, the latter being adapted to engage the eccentric at the end of travel of the yoke;

FIGURE 4 is a perspective view of the Scotch-yoke mechanism, showing the slot formed in the top side Wall of the yoke;

FIGURE 5 is a side elevational view of the Scotchyoke mechanism, showing the engagement of the eccentric with the stationary lubricant applicator;

FIGURE 6 is a view taken along the lines 6-6 of FIGURE 4;

FIGURE 7 shows a preferred means for retaining the lubricant applicator; and

FIGURE 8 is a view taken along the lines 8-8 of FIGURE 7, showing the oil duct for replenishing the supply of lubricant in the stationary applicator.

Jith reference to the drawings, in particular FIG- URES 4 and 6, there is illustrated a Scotch-yoke mechanism 16, which includes a reciprocating longitudinal shaft 11, transverse yoke '12 secured to the shaft :11, and eccentric means 13 (such as a crank pin or roller) guided within the guide track 14, which is formed between the parallel walls -15 and 16 of the yoke 12.

With reference to FIGURE 5, the eccentric 13 may be carried by a rotating flywheel or gear 17, which is mounted on a stub shaft 18, and which engages a suitable pinion 19. Preferably, but not necessarily, the gear 17 is provided with one or more holes 20 so that a weight (not shown) may be inserted therein for purposes of counterbalancing the mechanism 10.

With reference to FIGURES 1-4, the top side wall 15 of the yoke 12 includes a slot 21, and a stationary lubricmt applicator 22. (as for example, an oil wick) is retained by a member 23 and is adapted to be received partially within the slot 21 near the end of travel of the yoke 12. The tip of the applicator 22 is thus guided within the slot 21 near the end of travel of the yoke 12, as shown in FIGURE 2; and then, as shown in FIGURE 3,

the eccentric :13 contacts the applicator 22 at the end of travel of the reciprocating yoke 12. Consequently, the

eccentric 1 3 acquires lubricant from the applicator 22 and deposits it within the guide track 14 of the yoke 12.

5 The physical contact between the eccentric 13 and applicator 22 is shown as occurring at the top of the stroke, that is, top of the travel of the yoke 12 and eccentric 13; but it will be appreciated 'by one skilled in the art, that this contact could also occur at the bottom of the stroke as well, in which case an opening would be formed in the \bottom Wall 16 of the yoke 12, while the applicator '12 would be positioned at the bottom of the stroke.

Moreover, the slot 21 is only one example of a variety of openings that may be formed in one of the

side Walls

15 or 16 of the yoke 12, although it will be appreciated that, preferably, the opening in the side wall should not substantially detract from the bearing surface provided by the respective side wall for the eccentric 13.

With reference to FIGURE 7, the lubricant applicator 22 may be substantially flat and may be retained between two

members

23a and 23b, which are secured to the housing by means of screws 24 received in tapped holes 25. Also, with reference to FIGURES 7 and 8, a duct 26 may be formed in the housing 27 for purposes of replenishing the supply of lubricant in the applicator 22.

Obviously, many modifications may be made without departing from the basic spirit of the present invention; and accordingly, within the scope of the appended claims, the invention may be practiced other than has been specifically described.

I claim:

1. In combination with a Scotch-yoke mechanism hav ing a reciprocating yoke including a pair of parallel side walls forming a guide track for an eccentric, lubrication means comprising:

(a) a stationary lubricant applicator positioned at one end of travel of the reciprocating yoke; and

(b) means including an opening in one of the side walls of the yoke to allow said applicator to pro trude therethrongh to contact the eccentric at one end of travel of the yoke.

2. Lubrication means as defined in claim 1, wherein:

(a) said applicator protrudes through said opening immediately previous to the end of travel of the yoke, whereby said applicator is guided said opening before being contacted by the eccentric.

3. Lubrication means as defined in claim 1, wherein:

(a) said applicator has a forward tip which protrudes within said opening.

4. Lubrication means as defined in claim 1, wherein:

(a) said opening comprises a slot formed in the top side wall of the yoke, and wherein:

(b) said applicator comprises a fiat oil wick adapted to be received partially within said slot.

5. In combination with a Scotch-yoke mechanism housed in a casing, wherein the mechanism has a reciprocating yoke including a pair of parallel side walls forming a guide track for an eccentric, lubrication means comprising:

(a) a stationary lubricant applicator secured to the casing and having a forward tip positioned at one end of travel of the reciprocating yoke;

(b) means including a duct formed in the casing to replenish the supply of lubricant to said applicator; and

(0) means to allow said tip of said applicator to protrude through one of the side walls of the yoke to contact the eccentric at one end of travel of the yoke.

6. In combination with a Scotch-yoke mechanism having a reciprocating yoke including at least one side wall formed therein, and further having an eccentric guided the yoke, lubrication means comprising:

3 (a) -a stationary lubricant applicator positioned at one end of travel of the reciprocating yoke, with said one side wall of the yoke being between the eccentric and said applicator; (b) means to replenish the supply of lubricant in said applicator; and

(0) means forming an opening in said one side wall of the yoke, whereby said applicator may protrude through said opening to engage the eccentric at the end of travel of the yoke.

7. In combination with a Scotch-yoke mechanism housed in a casing, wherein the mechanism has a reciprocating yoke including at least one side Wall formed therein, and wherein the mechanism further has an eccentric guided within the track, lubrication means comprising:

(a) a stationary lubricant applicator disposed within the casing at one end of travel of the reciprocating yoke, with said one side wall of the yoke being between the eccentric and the applicator;

(b) means including a holding member to secure said applicator to said casing;

(0) means including a duct formed in the casing to replenish the supply of lubricant to said applicator;

(d) means forming an opening within said one side wall of the yoke; and

(e) said applicator having a forward tip which protrudes through said opening immediately previous to the end of travel of the yoke, whereby said applicator is guided within said opening before being contacted by the eccentric, and whereby the eccentric wipes against said applicator at the end of travel of the reciprocating yoke.

References Cited in the file of this patent UNITED STATES PATENTS 2,024,329 Beesley Dec. 17, 1935 2,869,231 Gury Ian. 20, 1959 2,988,924 Cooley June 20; 1961 3,013,324 Robinson Dec. 19, 1961

Claims

6. IN COMBINATION WITH A SCOTCH-YOKE MECHANISM HAVING A RECIPROCATING YOKE INCLUDING AT LEAST ONE SIDE WALL FORMED THEREIN, AND FURTHER HAVING AN ECCENTRIC GUIDED WITHIN THE YOKE, LUBRICATION MEANS COMPRISING: (A) A STATIONARY LUBRICANT APPLICATOR POSITIONED AT ONE END OF TRAVEL OF THE RECIPROCATING YOKE, WITH SAID ONE SIDE WALL OF THE YOKE BEING BETWEEN THE ECCENTRIC AND SAID APPLICATOR;