EP0117851A2 - Stillstandbremse für mechanische oder hydraulische Pressen - Google Patents

Stillstandbremse für mechanische oder hydraulische Pressen Download PDF

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Publication number
EP0117851A2
EP0117851A2 EP84830040A EP84830040A EP0117851A2 EP 0117851 A2 EP0117851 A2 EP 0117851A2 EP 84830040 A EP84830040 A EP 84830040A EP 84830040 A EP84830040 A EP 84830040A EP 0117851 A2 EP0117851 A2 EP 0117851A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
parking brake
mechanical
piston
mass
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.)
Withdrawn
Application number
EP84830040A
Other languages
English (en)
French (fr)
Other versions
EP0117851A3 (de
Inventor
Loredana Nibio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0117851A2 publication Critical patent/EP0117851A2/de
Publication of EP0117851A3 publication Critical patent/EP0117851A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/287—Arrangements for preventing distortion of, or damage to, presses or parts thereof preventing unintended ram movement, e.g. using blocking devices

Definitions

  • the present patent application for an industrial invention has as its object a parking brake for mechanical or hydraulic presses, capable of holding the stationary mass stationary, while allowing sliding if the special mass adjustment devices are actuated, such as for example during the stamp exchange phase.
  • the parking brake according to the invention to the content, is studied so that it intervenes automatically, during all the time that it remains actuated, on the electric valve for stopping the flow of compressed air to the clutch-brake group, this is why even if any impulse arrives at the above-mentioned electric valve of the electrical installation of press, it cannot operate until the parking brake remains engaged.
  • the invention fundamentally comprises a pneumatic piston, the rod of which plunges into a hydraulic cylinder, where the oil under pressure pushes forward a piston which has, on its external face, a front crest , diametral and wedge-shaped, which will press and fit into a conforming longitudinal groove, hollowed out along a generatrix of a shaft which crosses transversely the hydraulic cylinder and which results anchored to the mass.
  • the stopping action in the parking brake according to the invention therefore, is entrusted to the sole adhesion, by sliding friction, of the two converging sides of the aforesaid corner on the lateral edges of the longitudinal groove present on the shaft above.
  • the braking wedge rolls by sliding in its place until the driving force exceeds the friction force.
  • Fig. 1 is a side view of the parking brake according to the invention.
  • Fig. 2 is the orthogonal projection from left to right of FIG. 1.
  • Fig. 3 is the section of FIG. 1 with the longitudinal plane A-A.
  • Fig. 4 is the orthogonal projection of FIG. 1 from the narrow to the left.
  • the invention comprises a pneumatic cylinder (1), single acting, in which a piston (2) moves, the rod of which plunges into a hydraulic cylinder (4), which is coaxial and screwed to the cylinder ( 1).
  • the rod (3) ends and slides exactly in a circular duct (5), which is inserted axially into the piston (6) of the cylinder (4), a piston which has a longitudinal extension somewhat less than the length of the master bedroom (4).
  • This conduit (5) terminates frontally in a circular chamber (5a), of a slightly larger diameter, from which radiate outwards and backwards small radio-axial conduits (7) through which the oil joins the subtle annular gap (8), which surrounds the rod (3) and which is interposed between the rear face of the piston (6) and the bottom wall (4a) of the cylinder (4).
  • the piston (6) has on its outside, anterior face, a diametrical ridge (6a), wedge-shaped, which fits exactly and which slides in a conforming groove (9a) which longitudinally cuts a hollow shaft (9) ), which crosses diametrically the front bottom wall (4b) of the cylinder (4), suitably sized and shaped.
  • the oil first, flows back through the radio-axial conduits (7) into the subtle annular chamber (8), located behind the piston (6), then, put under pressure by the pressing rod (3), it pushes forward the udder tone (6), whose front corner (6a) presses and fits into the longitudinal groove (9a) of the shaft (9), which, as we sketched in our introduction, results in solidarity to the mass of the press.
  • the oil under pressure can be withdrawn through a special tapped hole (8b) provided on the wall of the cylinder (4), which is collated by a tube to the above-mentioned device intended to inter + capture the compressed air.
  • the piston (6) when it advances, obstructs and pushes back two bars (11) which slide longitudinally in the bottom wall (4b) of the cylinder (4) and which press against a circular slide (12), the setback is opposed by an elastic member (13), the preload of which can be adjusted by acting on the nut (14) screwed onto the outer wall of the bottom (4b).
  • These cylindrical bars (11) have the role of pushing back in its primitive position and of resting the piston (6) when the parking brake is disconnected, in such a way that the corner (6a) can be detached from the walls of the groove (9a) and therefore the free insertion of the shaft (9), dragged by the mass in its alternative strokes.
  • the braking prismatic couple for example, instead of being constituted by a wedge sliding in a corresponding groove executed lengthwise on the shaft (9), as we have described above, could indifferently consist of one or more skates capable of surrounding and holding stationary, by adhesion, the shaft (9).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
EP84830040A 1983-02-23 1984-02-16 Stillstandbremse für mechanische oder hydraulische Pressen Withdrawn EP0117851A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT00610/83A IT1172468B (it) 1983-02-23 1983-02-23 Freno di stazionamento per presse meccaniche od idrauliche
IT61083 1983-02-23

Publications (2)

Publication Number Publication Date
EP0117851A2 true EP0117851A2 (de) 1984-09-05
EP0117851A3 EP0117851A3 (de) 1985-10-09

Family

ID=11292250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84830040A Withdrawn EP0117851A3 (de) 1983-02-23 1984-02-16 Stillstandbremse für mechanische oder hydraulische Pressen

Country Status (2)

Country Link
EP (1) EP0117851A3 (de)
IT (1) IT1172468B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5421920A (en) * 1992-09-24 1995-06-06 Nippon Steel Corporation Process for producing rolled shape steel material having high strength, high toughness, and excellent fire resistance
CN114810879A (zh) * 2022-06-08 2022-07-29 浙江师范大学 一种复合式线控制动器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB923516A (de) * 1900-01-01
BE431827A (de) * 1937-12-23
FR944111A (fr) * 1947-03-28 1949-03-28 A E R E M Presse mécanique à découper, à emboutir ou autre application
FR1232693A (fr) * 1958-08-26 1960-10-11 Schuler L Ag Dispositif pour fixer la partie de travail mobile, notamment de presses mécaniques, en empêchant leur mouvement de fermeture intempestif
FR2230495A1 (en) * 1973-05-23 1974-12-20 Jambon Anciens Ateliers H Hydraulic screw press - fault actuates valve to maintain pressure and lock screws

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5421920A (en) * 1992-09-24 1995-06-06 Nippon Steel Corporation Process for producing rolled shape steel material having high strength, high toughness, and excellent fire resistance
US5985051A (en) * 1992-09-24 1999-11-16 Nippon Steel Corporation Shape steel material having high strength, high toughness and excellent fire resistance and process for producing rolled shape steel of said material
CN114810879A (zh) * 2022-06-08 2022-07-29 浙江师范大学 一种复合式线控制动器

Also Published As

Publication number Publication date
EP0117851A3 (de) 1985-10-09
IT1172468B (it) 1987-06-18
IT8300610A0 (it) 1983-02-23

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