TSUBAKI EMERSON CAM CLUTCH

More documents

Recommendations

Info

www.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 223-3071 B-4. BACKSTOPPING IN INTERMITTENT FEEDING Cam clutch and feed accuracy When designing a high-accuracy feeding device that incorporates Cam Clutch indexing, both the driving and driven units must be made light in weight and high in rigidity. Moreover, when selecting the ideal Cam Clutch, it is extremely important to select a brake to stop the driven unit at a preset position, a positioning device, and a Cam Clutch for backstopping (which cannot be expected of the Cam Clutch for indexing). Feed accuracy = Cam Clutch for indexing + Cam Clutch for backstop + Brake Cam Clutch for backstopping This Cam Clutch overruns when the Cam Clutch for indexing has completed one feeding stroke. If the frictional resistance of the driven unit is smaller than the overrunning frictional torque of the Cam Clutch, or if a reverse torque occurs on the driving side due to back MX Series tension of the material, the driven unit may rotate in reverse without stopping at the end point fed by the Cam Clutch. The most effective way to prevent this is to mount a Cam Clutch for backstopping, although a brake or positioning pin may also be used for this purpose. Since the Cam Clutch for backstopping repeats the overrunning and engagement at the same frequency as that of the Cam Clutch for indexing, use one that is equivalent to the feeding clutch or one that is one size smaller. Brakes and other stopping devices The outer race of a Cam Clutch for indexing starts reverse rotation immediately upon the completion of one feeding stroke. At the same time, the Cam Clutch starts overrunning. At this moment, the driven unit is free from all restrictions, and therefore, when the driven unit has a Cone brake larger inertia or the feed speed is faster, the inner race tends to rotate beyond the stroke of the outer race. To prevent this, a friction brake is often used as a braking device, although a positioning pin or stopper may also be used for this purpose. A braking device significantly improves the feed accuracy. Accordingly, use a frictional brake which has as small a fluctuation as possible in its braking force. The wet-type cone brake is most effective. Please consult <strong>TSUBAKI</strong> regarding brake selection. B-5 FEEDING WITH STOPPER (Feed frequency = Up to 300 times/min.) (Feed angle = up to 90°) In this application, a stopper forcibly stops the material to be indexed at a position just before the feed end point, to obtain a fixed feeding pitch. As soon as the material hits the stopper, a shock torque larger than the torque required for feeding is applied to the feeding roll which is still rotating. The figure below shows an example of a Cam Clutch used in a bolt header. The wire is fed intermittently by a Cam Clutch mounted on a grooved feed roll. Since the feed length of the wire is set longer than necessary, the fed wire hits the stopper which has been set at a position where the wire can be fed at the necessary length. The reactive force this generates acts as vibrating shock load upon the Cam Clutch. It is therefore necessary to consider this when selecting a Cam Clutch. Example of bolt header Applicable series Consult <strong>TSUBAKI</strong>. Cautions When setting the feed length, consider the following: Feed length setting = Necessary length + α The closer to zero α is, the smaller the vibrating shock load on the Cam Clutch becomes and consequently, the longer the service life becomes. www.bergab.ru Берг АБ bergab@ya.ru Тел. 17 (495)-228-06-21, факс (495) 223-3071
www.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 223-3071 B-6. SPEED CHANGE (Feed frequency : N = Up to 300 times/min.) (Feed angle : θ = Up to 90°;N ×θ= 20,000 max.) In an intermittent feed mechanism that uses one or more Cam Clutches, the speed of the driven side is changed steplessly by changing the feed angle. The figure below shows an example of a sprinkler (manure spreader). The amount of manure to be sprinkled, which varies depending on the field conditions, must be adjusted case by case. The chain conveyor is driven by an intermittent Cam Clutch feeding action and the manure loaded on the cart is fed in bits to the sprinkling vanes, which rotate continuously. The manure to be sprinkled can thus be kept at the optimum amount by adjusting the amount of manure to be fed. The feed amount (or angle of the Cam Clutch) can be controlled steplessly while the sprinkler is operating. Structure of speed controlling section Applicable Series Series Advantage Page MI-S For medium speeds (Up to 300 times/min.) 41 MI For medium speeds (Up to 300 times/min.) 65 MZ, MZEU 200 PB For low speeds (Up to 150 times/min.) For low speeds (Up to 150 times/min.) 22 to 31 LD For low speeds (Up to 100 times/min.) and light loads 38 32 37 Sprinkler example www.bergab.ru Берг АБ bergab@ya.ru Тел. 18 (495)-228-06-21, факс (495) 223-3071
Page 1 and 2: www.bergab.ru Берг АБ bergab@
Page 17: www.bergab.ru Берг АБ bergab@
Page 35 and 36: A P - 2 - t www.bergab.ru Берг
Page 69 and 70:
www.bergab.ru Берг АБ bergab@
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
show all

TSUBAKI EMERSON CAM CLUTCH

Create successful ePaper yourself

Delete template?

Save as template?