Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H7/00—Gearings for conveying rotary motion by endless flexible members
  • F16H7/08—Means for varying tension of belts, ropes, or chains
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H7/00—Gearings for conveying rotary motion by endless flexible members
  • F16H7/08—Means for varying tension of belts, ropes, or chains
  • F16H2007/0802—Actuators for final output members
  • F16H2007/0808—Extension coil springs
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H7/00—Gearings for conveying rotary motion by endless flexible members
  • F16H7/08—Means for varying tension of belts, ropes, or chains
  • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
  • F16H2007/0851—Wedges

Definitions

• the present invention relates to a tensioning device for tensioning a traction means of an internal combustion engine, with a rotatably mounted end rail, the rear side facing away from the traction means is formed with a bearing surface extending on the internal combustion engine to form a tapered towards the pivot point of the rail space, and a pressure-loaded slide, which is acted upon by the force of a spring along the contact surface in the direction of rejuvenation of the space.
• a clamping device according to the aforementioned type is known from JP 2009257455 A.
• the document shows a tensioning device to compensate for elongations of a traction device with a rail end point navddlinggela-, wherein between the rail and a contact surface of an internal combustion engine, a spring loaded with a slider is arranged.
• the contact surface and the rail form a space that tapers towards the pivot point of the rail.
• the spring which pushes the slider in the tapering direction of the space is formed as a compression spring.
• the compression spring is supported with its one end on an additional contact surface of the internal combustion engine and with its other end on the slider.
• the object of the invention is to provide a cost-effective and easy-to-install clamping device. Summary of the invention
• the object is achieved in that a spring is fixed with its first spring end at the pivot point end of the rail and with its second end of the spring to the slide.
• the particular advantage of this is that no additional contact surface must be attached to the internal combustion engine.
• the clamping device can be delivered and assembled as a complete component.
• a preferred embodiment of the invention provides that the rail has two adjacent to its rear side surfaces, of which at least one has a guide tab, which engages in at least one laterally introduced into the slide, longitudinal guide groove. As a result, a lateral displacement or rotation of the slider is prevented.
• a cost-effective production of the clamping device provides to produce both the rail and the slide made of plastic by injection molding.
• the rail between the pivot-mounted rail end and an opposite rail end has a convex, extending in the direction of the contact surface projection.
• the projection is designed to form with the contact surface the space tapering towards the pivot point of the rail.
• FIG. 1 shows a schematic representation of a traction mechanism drive with tensioning device
• Figure 2 is a schematic representation of a traction mechanism drive with tensioning device, which has an additional guide unit
• Figure 3 is a detail view of the guide unit in a sectional view.
• FIG. 1 shows a schematic illustration of a traction mechanism drive of an internal combustion engine, which has a drive wheel 12, a driven wheel 13 and a traction mechanism 2 that wraps around the two wheels. Due to wear, it can come to the elongation of the traction means 2. The elongation must be compensated by a tensioning of the traction means 2 by means of a tensioning device 1 as shown in FIG.
• the tensioning device 1 has an end pivotally mounted rail 3. On the front of the rail 3, the traction means 2 slides along. The back of the rail 3, together with a contact surface 8 of the internal combustion engine, a, in the direction of the pivot point 14 of the rail 3 out, tapered space.
• an additional projection 9 between the pivot-mounted rail end 6a and an opposite rail end 6b is arranged.
• the projection 9 extends in the direction of the contact surface 8, as a result of which the space between the rail 3 and the contact surface 8 is additionally reinforced. is getting younger.
• a slider 7 is movably arranged, wherein the slider 7 contacts both the projection 9 and the abutment surface 8.
• the slider 7 is also connected via a tension spring 4 with the pivot-mounted rail end 6a, whereby the slide 7 is subjected to a force in the direction of the pivot point 14 of the rail 3.
• the traction means 2 presses in the tensioned state against the rail 3.
• the rail 3 in turn presses against the voltage applied to the contact surface 8 slide 7.
• the slide 7 is held in position as long as long as the frictional forces acting on him, which depends on the on Rail 3 acting force are higher than the force acting on the slide 7 tensile force of the spring 4. Only when the traction means 2 lengthens and the force acting on the rail 3 decreases, the frictional forces decrease and, the slide 7 is by spring force drawn in the rejuvenation direction of the room.
• the slide 7 is wedge-shaped, with its tapered end pointing in the direction of the pivot point 14 of the rail 3.
• FIG. 2 shows a development according to the invention of the tensioning device 1 described in FIG.
• the slider 7 of the tensioning device 1 is additionally guided linearly in this embodiment.
• the linear guide has a guide lug 1 1, which is arranged laterally on the rail 3 and thereby extends in the direction of the slide 7.
• the guide tab 1 1 engages laterally in the guide groove 10 and thus prevents the slide 7 loses the frictional contact with the rail 3 or the projection 9.
• Figure 3 shows the linear guide described in Figure 2 in a sectional view.
• the rail 3 has in this embodiment, two guide plates 1 1, which laterally engage in two provided for this purpose guide grooves 10 of the slider 7.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43875562

Family Applications (1)

Country Status (5)

Families Citing this family (5)

Citations (5)

Family Cites Families (5)

• 2010
  • 2010-05-17 DE DE201010020758 patent/DE102010020758A1/de not_active Withdrawn
• 2011
  • 2011-04-05 WO PCT/EP2011/055234 patent/WO2011144383A1/de active Application Filing
  • 2011-04-05 JP JP2013510533A patent/JP5815683B2/ja not_active Expired - Fee Related
  • 2011-04-05 CN CN201180024453.2A patent/CN102893059B/zh not_active Expired - Fee Related
  • 2011-04-05 BR BR112012029120A patent/BR112012029120A2/pt not_active IP Right Cessation

Patent Citations (5)

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