Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B5/00—Clamps
  • B25B5/06—Arrangements for positively actuating jaws
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
  • B23Q3/002—Means to press a workpiece against a guide
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B5/00—Clamps
  • B25B5/04—Clamps with pivoted jaws

Definitions

• the invention relates to a side pressure piece for the workpiece positioning on a support provided with one or more stops using elastic pressure means with a holding pin partially enclosed in a housing and embeddable with the housing in an opening of the support.
• Such side pressure pieces are known for example from the older German patent 2,503,246.
• the retaining pin is made of an elastic material embedded and held so resiliently, that is, if it is brought out of its normal position by applying a correspondingly large force, then it tries to return to this normal position.
• the retaining pin can be deflected from its normal position in any direction, and with it the collar is moved out of its normal position against the spring force. That means that the spring force tries to push the collar back into its normal position and at the same time to bring the retaining pin back into its normal position.
• This restoring force is generated by the compression spring, which is arranged between the housing base and the collar.
• the stronger the spring force of this compression spring the greater the restoring force with which the retaining pin ultimately wants to return to its normal position.
• the side pressure piece according to the invention is distinguished by a much greater insensitivity to material fatigue due to the use of a conventional compression spring, so it can be subjected to virtually unlimited static and dynamic loads. Furthermore, the compression spring allows greater spring travel than the elastomeric materials used in the known side pressure pieces, it is thus possible to compensate for much greater tolerances in the workpieces to be fastened with the side pressure piece according to the invention.
• the side pressure pieces according to the invention are characterized by a greater resistance to the action of heat and chemicals, in particular all types of solvents, and they are almost insensitive to corrosion even when using stainless spring steel for the compression spring. It has proven to be particularly advantageous if the collar of the retaining pin is provided with a partially spherical outer surface in the side pressure piece according to the invention. In the case of a cylindrical housing, such an outer surface allows the retaining pin to be deflected and, at the same time, the collar resting against the housing wall to be tilted without the collar losing its guidance on the housing wall. Such an embodiment is characterized in particular by a very uniform change in the spring force when the holding pin is deflected from its normal position.
• the housing is partially hollow in the region of the federal government.
• Such an embodiment provides good guidance over the entire deflection range even with a simple disk-shaped collar, on the other hand, such an embodiment in connection with a partially spherical outer surface of the collar is almost optimal for guiding when deflecting the retaining pin.
• the restoring force of the retaining pin can be varied by using a spring of different strength in the side pressure piece according to the invention.
• the side pressure piece according to the invention can thus be supplied with different restoring forces.
• the spring force of the compression spring is designed to be changeable by means of an actuator.
• Such a change in the spring force of the compression spring can thus be brought about by means of an adjusting screw which is arranged in the housing base and provided with a stop for the compression spring, which if necessary with a lock nut or locked in any other known manner.
• the spring force of the compression spring in the housing can be varied within a wide range and thus also the restoring force of the retaining pin.
• the holding pin can have any shape, but it has proven to be useful if it is designed as a cylindrical pin and provided with a rounded tip protruding from the base. According to another advantageous embodiment of the present invention, the holding pin is provided with a spherical head protruding from the base. Another version provides a holding pin with a conical head protruding from the base. All of these embodiments are suitable for clamping workpieces between one or two fixed stops and the retaining pin.
• the housing of the side pressure piece according to the invention which is expediently made of metal, is expediently inserted flush into the base, so that only the retaining pin protrudes from the opening of the base.
• the retaining pin is provided with an extension beyond the collar, which represents a centering for the compression spring, which is usually of spiral design.
• the side pressure pieces according to the invention are additionally distinguished from the previously known side pressure pieces in that they can absorb or transmit pressure forces not only in two directions, but in three different directions.
• the spring materials used for the Aufb are available in various specifications commercially, so that the pressure pieces according to the invention can be manufactured with standard materials for all conceivable requirements.
• Figure 1 is a side view of the side pressure piece according to the invention in section.
• FIG. 2 shows a side view of another embodiment of the side pressure piece according to the invention in section, in which the spring force can be varied by means of an adjusting screw;
• Fig. 3 shows the arrangement of the side pressure piece according to the invention in a base on average when clamping a workpiece.
• the side pressure piece according to the invention shown in Fig. 1 consists of a partially inserted in a housing grasped and thus insertable into the opening of a base retaining pin 1, which is provided with a collar 3 resting on the housing wall and of a compression spring 5 arranged in the housing between the housing base 4 and collar 3 with its collar 3 against the inwardly angled edge 6 of the housing 2 is pressed.
• the collar 3 of the retaining pin 1 is provided with a partially spherical outer surface with which it rests on the housing wall. In the case of the cylindrical housing wall, this part-spherical outer surface allows the retaining pin to be deflected and the collar to tilt at the same time without the collar losing its guidance on the housing wall. Through this part-spherical outer surface of the federal government, a very uniform transmission of the spring force on the deflection of the retaining pin from its normal position is achieved.
• an inward bulge 7 is arranged, which serves to center the compression spring 5.
• An extension of the holding pin 1 beyond the collar 3 has the same purpose. This extension is also enclosed by the compression spring and thus serves to hold the compression spring in its position.
• an adjusting screw 8 is adjustably arranged in a corresponding threaded opening in the housing base 4.
• This set screw 8 has a support 9 for the compression spring 5. This support can be moved closer to the collar 3 of the retaining pin 1 by turning the set screw, whereby the tension force of the compression spring 5 is increased.
• the set screw 8 is locked in its desired position by means of a lock nut 10.
• Fig. 3 shows the side pressure piece according to the invention in Cut, inserted in a pad 11.
• the workpiece 12 is clamped between a stop 13 and the retaining pin 1 of the side pressure piece according to the invention and is held in this position by the restoring force of the retaining pin 1.
• the holding pin can thus be moved laterally in all directions and it can also move in the vertical direction against the force of the compression spring 5.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Jigs For Machine Tools (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6233060

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (17)

Citations (4)

Family Cites Families (3)

• 1984
  • 1984-04-09 DE DE19843413298 patent/DE3413298A1/de not_active Withdrawn
• 1985
  • 1985-04-06 JP JP60501664A patent/JPS61501758A/ja active Granted
  • 1985-04-06 US US06/817,750 patent/US4793603A/en not_active Expired - Lifetime
  • 1985-04-06 EP EP85901377A patent/EP0179079B1/de not_active Expired
  • 1985-04-06 DE DE8585901377T patent/DE3572616D1/de not_active Expired
  • 1985-04-06 WO PCT/DE1985/000102 patent/WO1985004611A1/de active IP Right Grant
  • 1985-04-06 AU AU41575/85A patent/AU4157585A/en not_active Abandoned

Patent Citations (4)

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