CA1253716A - Dynamic balancing device for press - Google Patents
Dynamic balancing device for pressInfo
- Publication number
- CA1253716A CA1253716A CA000489892A CA489892A CA1253716A CA 1253716 A CA1253716 A CA 1253716A CA 000489892 A CA000489892 A CA 000489892A CA 489892 A CA489892 A CA 489892A CA 1253716 A CA1253716 A CA 1253716A
- Authority
- CA
- Canada
- Prior art keywords
- levers
- slide
- connecting rod
- pair
- crankshaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Press Drives And Press Lines (AREA)
Abstract
Abstract of the Disclosure A dynamic balancing device for a press has a connecting rod provided to fit in an eccentric member of a crankshaft. A link is provided to be journalled on one end thereof to a head of a larger diameter of said connecting rod. A pair of balance weights are provided on both ends of and close to the center of said crankshaft in a manner movable to substantially oppose to the direction of a slide of the press. A
pair of levers are provided to be connected on one end thereof to each balance weight and to be journalled on an intermediate point along the length thereof to a frame of the press, and the other end of each lever of the pair is journalled to the other end of said link.
pair of levers are provided to be connected on one end thereof to each balance weight and to be journalled on an intermediate point along the length thereof to a frame of the press, and the other end of each lever of the pair is journalled to the other end of said link.
Description
1;~S3~ ll6 S P E C I F :[ C A T I O N
Title of the Invention:
Dynamic Balancing Device for Press Detailed Description of the Inven-tion:
This invention relates to a dynamic balancing device for a press.
In the prior art dynamic balance ln inertia force is kept between a slide which moves up and down and a crank mechanism which rotates with eccentricity within a press by providing balance weights to move relative to the crankshaft or the slide via gears, levers or links. But this inevitably makes the whole structure complex and large, presenting a difficulty.
An object of this invention is to obviate such defects of the prior art and to provlde a dynamic balancing device for a press which is simple in construction and which can effectively use void spare within the frame of a press by connecting the upper end of a connecting rod which connects an eccentric member of a crankshaft and a slide with a halancing weight by links and levers. This invention will now be described referring to embodiments shown in drawings.
FIG. 1 is a vertically sectioned frontal view of essential portions of a press for which an embodiment of i~i3'~l6 this invention is applied.
FIG. 2 is a sec-tional view cut at the l:Lne Il-II of FIG. 1.
FIG. 3 is a sec-tional view cut at the line III-III
in FIG. 2.
In FIG. 1, a crankshaEt 2 is rotatably provided in a frame 1 of a press and eccentric members 3,3 are formed at two locations along the crankshaft 2. On one end of the crankshaft 2 is mounted a fly wheel 4 having a clutch.
The rotation of the fly wheel 4 which is driven by a motor (not shown~ is transmitted to the crankshaft 2 via the clutch. On the other end of the crankshaft 2 is provided a brake 5. Connecting rods 6,6, are engaged in a freely rotatable manner with the eccentric members 3,3 of the crankshaft 2 on one end having a large diameter while spherical members provided on the other ends of the connecting rods 6,6 are connected to a sliding member 7 of the press. The crankshaft 2 is provided with balancing weights 8,8 which keeps dynamic balance against the eccentric members 3,3.
FIGs. 1, 2 and 3 show the structure of an embodiment of this invention wherein the head of a connecting rod of a larger diameter or the upper portion thereof is connected to a link 10 at the lower end thereof with a pin 9 parallel to the crankshaft 2. The upper end of a link 10 is forked into two.
3~7~6 A palr of levers 13,13c~re journaled on the upper portion oE -the ~rame 1 wi-th a supporting axes 12,12 which are parallel -to the crankshaft 2. The levers 13,13 are connected on one end -thereof wi-th the upper end of the link 10 with a pin 11. An eccentric bush 14 is in-terposed between the pin 11 and said one end of one o:E the levers 13 of said pair. This eccen-tric bush 14 is used to prevent the system comprising the links and levers which are connected hy the pin 11 from being rocked.
In FIGs. 2 and 3, if attention is focused on the movement of the pin 11, the locus of the pin 11 forms an arc determined by an arm of the left side lever 13 and the right side lever becomes interlocked to the left side lever by the function of the eccentric bush 14. Therefore, an eccentric bush 14 may be provided respectively on both levers 13,13.
On the other end of each lever 13 is fixed respec-tively pins 15,15 which are parallel to the supporting axes 12. A pair of balance weights 16,16 are provided on both forward and rearward sides lor lefthand and righthand sides in FIG. 2) of the crankshaft 2, the balancing weights being connected to pin 15 of the lever 13 on the upper end thereof. Each of the balance weights 16,16 is bored to have a hole 17 extending vertically, through which is éngaged a guide pin 18 fixed upward on the frame 1 in a manner to allow up and down movement of the weight via a 1,'Z53tî'~
ball joint 19. The above described structure is provided Eor each connecting rod 6,6, oE the pair.
The operational effect will now be described.
As the crankshaft 2 rotates, the slide 7 of the press is made to move vertically via the connecting rod 6. When the link 10 which is connected to -the connecting rod 6 with a pin 9 moves up and down, the pin 11 moves in an arc around the suppor-ting axis 12 of the lever 13 on the side the pin is direc-tly connected. The other lever 13 connected via the eccentric bush 14 follows the pin 11 to smoothly swing as the center distance between the eccentric bush 14 and the supporting axis 12 changes by the revolving movement of the eccentric bush 14 in arc around the pin 11. As the levers 13,13 swing in this manner, the pin 15 swings in an arc around the supporting axis 12. The balance weight 16 connected to the pin 15 follows the movement of the pin 15 to move up and down with its head swinginy forward and rearward of the press as it is connected to the guide pin 18 via the ball joint 19. As the pair of balance weights 16,16 swing symmetrically in respect of the plane including the shaft center of the crankshaft 2, no vibration in the horizontal direction is caused. As is obvious from the foregoing description, according to this invention, as balance weights are connected to the larger diameter head portions of connect-ing rods via links and levers, the balancing structure 371tj ..''`' becomes simplified and compact. Balance weights thereEore may be provided to oppose to slides in the space within the Erame of a press, thereby enabling effective use of the space. This inven-tion can achieve practical effect and merits as above mentioned.
Title of the Invention:
Dynamic Balancing Device for Press Detailed Description of the Inven-tion:
This invention relates to a dynamic balancing device for a press.
In the prior art dynamic balance ln inertia force is kept between a slide which moves up and down and a crank mechanism which rotates with eccentricity within a press by providing balance weights to move relative to the crankshaft or the slide via gears, levers or links. But this inevitably makes the whole structure complex and large, presenting a difficulty.
An object of this invention is to obviate such defects of the prior art and to provlde a dynamic balancing device for a press which is simple in construction and which can effectively use void spare within the frame of a press by connecting the upper end of a connecting rod which connects an eccentric member of a crankshaft and a slide with a halancing weight by links and levers. This invention will now be described referring to embodiments shown in drawings.
FIG. 1 is a vertically sectioned frontal view of essential portions of a press for which an embodiment of i~i3'~l6 this invention is applied.
FIG. 2 is a sec-tional view cut at the l:Lne Il-II of FIG. 1.
FIG. 3 is a sec-tional view cut at the line III-III
in FIG. 2.
In FIG. 1, a crankshaEt 2 is rotatably provided in a frame 1 of a press and eccentric members 3,3 are formed at two locations along the crankshaft 2. On one end of the crankshaft 2 is mounted a fly wheel 4 having a clutch.
The rotation of the fly wheel 4 which is driven by a motor (not shown~ is transmitted to the crankshaft 2 via the clutch. On the other end of the crankshaft 2 is provided a brake 5. Connecting rods 6,6, are engaged in a freely rotatable manner with the eccentric members 3,3 of the crankshaft 2 on one end having a large diameter while spherical members provided on the other ends of the connecting rods 6,6 are connected to a sliding member 7 of the press. The crankshaft 2 is provided with balancing weights 8,8 which keeps dynamic balance against the eccentric members 3,3.
FIGs. 1, 2 and 3 show the structure of an embodiment of this invention wherein the head of a connecting rod of a larger diameter or the upper portion thereof is connected to a link 10 at the lower end thereof with a pin 9 parallel to the crankshaft 2. The upper end of a link 10 is forked into two.
3~7~6 A palr of levers 13,13c~re journaled on the upper portion oE -the ~rame 1 wi-th a supporting axes 12,12 which are parallel -to the crankshaft 2. The levers 13,13 are connected on one end -thereof wi-th the upper end of the link 10 with a pin 11. An eccentric bush 14 is in-terposed between the pin 11 and said one end of one o:E the levers 13 of said pair. This eccen-tric bush 14 is used to prevent the system comprising the links and levers which are connected hy the pin 11 from being rocked.
In FIGs. 2 and 3, if attention is focused on the movement of the pin 11, the locus of the pin 11 forms an arc determined by an arm of the left side lever 13 and the right side lever becomes interlocked to the left side lever by the function of the eccentric bush 14. Therefore, an eccentric bush 14 may be provided respectively on both levers 13,13.
On the other end of each lever 13 is fixed respec-tively pins 15,15 which are parallel to the supporting axes 12. A pair of balance weights 16,16 are provided on both forward and rearward sides lor lefthand and righthand sides in FIG. 2) of the crankshaft 2, the balancing weights being connected to pin 15 of the lever 13 on the upper end thereof. Each of the balance weights 16,16 is bored to have a hole 17 extending vertically, through which is éngaged a guide pin 18 fixed upward on the frame 1 in a manner to allow up and down movement of the weight via a 1,'Z53tî'~
ball joint 19. The above described structure is provided Eor each connecting rod 6,6, oE the pair.
The operational effect will now be described.
As the crankshaft 2 rotates, the slide 7 of the press is made to move vertically via the connecting rod 6. When the link 10 which is connected to -the connecting rod 6 with a pin 9 moves up and down, the pin 11 moves in an arc around the suppor-ting axis 12 of the lever 13 on the side the pin is direc-tly connected. The other lever 13 connected via the eccentric bush 14 follows the pin 11 to smoothly swing as the center distance between the eccentric bush 14 and the supporting axis 12 changes by the revolving movement of the eccentric bush 14 in arc around the pin 11. As the levers 13,13 swing in this manner, the pin 15 swings in an arc around the supporting axis 12. The balance weight 16 connected to the pin 15 follows the movement of the pin 15 to move up and down with its head swinginy forward and rearward of the press as it is connected to the guide pin 18 via the ball joint 19. As the pair of balance weights 16,16 swing symmetrically in respect of the plane including the shaft center of the crankshaft 2, no vibration in the horizontal direction is caused. As is obvious from the foregoing description, according to this invention, as balance weights are connected to the larger diameter head portions of connect-ing rods via links and levers, the balancing structure 371tj ..''`' becomes simplified and compact. Balance weights thereEore may be provided to oppose to slides in the space within the Erame of a press, thereby enabling effective use of the space. This inven-tion can achieve practical effect and merits as above mentioned.
Claims (3)
1. A dynamic balancing device in combination with a press having a rotating crankshaft with a crank rotated by said crankshaft and a reciprocating slide operatively connected to and driven by said crank, comprising:
a connecting rod means mounted around and freely rotatable relative to said crank and connected to said slide for reciprocating the slide along a path when said crank is rotated with said crankshaft;
link means directly pivotally connected at one end to said connecting rod means and reciprocated by said connecting rod means when said crank is rota-ted with said shaft;
a pair of levers pivotally connected to the other end of said link means at respective first ends thereof and extending in opposite directions from one another to respective second ends located at opposite sides of said crankshaft, each of said levers having a pivot point between said respective first and second ends around which said levers pivot;
a plurality of balancing weights for main-taining a dynamic balance of inertia forces generated by said slide and said connecting rod when said slide and connecting rod are reciprocated, a respective balancing weight connected at one end to the second end of a corresponding one of said pair of levers, said balancing weights being moved in opposite direc-tions to said slide and connecting rod means by said pair of levers when said slide and connecting rod means are reciprocated, said balancing weights each having a bore extending from the other end there-through in a direction parallel to the path along which said slide is reciprocated; and respective guide pins fixed to a frame of the press and each extending into a respective said bore of each of said balancing weights for slidingly guiding said balancing weights when said balancing weights are moved in the opposite directions.
a connecting rod means mounted around and freely rotatable relative to said crank and connected to said slide for reciprocating the slide along a path when said crank is rotated with said crankshaft;
link means directly pivotally connected at one end to said connecting rod means and reciprocated by said connecting rod means when said crank is rota-ted with said shaft;
a pair of levers pivotally connected to the other end of said link means at respective first ends thereof and extending in opposite directions from one another to respective second ends located at opposite sides of said crankshaft, each of said levers having a pivot point between said respective first and second ends around which said levers pivot;
a plurality of balancing weights for main-taining a dynamic balance of inertia forces generated by said slide and said connecting rod when said slide and connecting rod are reciprocated, a respective balancing weight connected at one end to the second end of a corresponding one of said pair of levers, said balancing weights being moved in opposite direc-tions to said slide and connecting rod means by said pair of levers when said slide and connecting rod means are reciprocated, said balancing weights each having a bore extending from the other end there-through in a direction parallel to the path along which said slide is reciprocated; and respective guide pins fixed to a frame of the press and each extending into a respective said bore of each of said balancing weights for slidingly guiding said balancing weights when said balancing weights are moved in the opposite directions.
2. The device as claimed in claim 1, and fur-ther comprising, a pin connecting said respective first ends of said pair of levers with said link means; and an eccentric bushing mounted to one of said pair of levers at said first ends between said pin and said first end of said one of said pair of levers.
3. The device as claimed in claim 1, wherein said balancing weights further comprise respective ball and socket joints in said bores slidably mounted to said guide pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000489892A CA1253716A (en) | 1985-09-03 | 1985-09-03 | Dynamic balancing device for press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000489892A CA1253716A (en) | 1985-09-03 | 1985-09-03 | Dynamic balancing device for press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1253716A true CA1253716A (en) | 1989-05-09 |
Family
ID=4131297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000489892A Expired CA1253716A (en) | 1985-09-03 | 1985-09-03 | Dynamic balancing device for press |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1253716A (en) |
-
1985
- 1985-09-03 CA CA000489892A patent/CA1253716A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |