Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D3/00—Steering gears
  • B62D3/02—Steering gears mechanical
  • B62D3/12—Steering gears mechanical of rack-and-pinion type
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
  • Y10T74/188—Reciprocating or oscillating to or from alternating rotary including spur gear
  • Y10T74/18808—Reciprocating or oscillating to or from alternating rotary including spur gear with rack
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/19—Gearing
  • Y10T74/19642—Directly cooperating gears
  • Y10T74/1967—Rack and pinion

Definitions

• the invention relates to a rack and pinion steering device according to the preamble of patent claim 1.
• stop noises are avoided in a rack and pinion steering device according to DE 34 29 597 A1, which has stop members which are attached to the rack in order to limit the axial movement of the rack against the housing.
• a part of the contact surfaces is equipped with resilient parts so that the resilient parts first strike, so as to absorb the impact shock before there is contact between the metals.
• the invention specified in claim 1 is based on the problem of designing a rack and pinion steering device of the type specified at the beginning, in which a satisfactory stroke limitation is achieved both for conventional steering systems and for assisted or power-assisted steering systems and disturbing run-up noises are avoided in the process.
• the problem is solved by the features listed in the characterizing part of claim 1, in that the elastically flexible material integrated between the stop pairs is completely encased by non-elastic parts of the stop means.
• Fig. 1 a detail X
• 1 b shows a further variant of the detail X.
• FIG. 1 In the drawing is a section of a rack and pinion steering device with a pair of stops 8; 9 and integrated lifting means 10; 1 1; 12 shown.
• the rack 1 extends axially movably in a steering gear housing 4.
• a pinion 2 which is held in constant engagement with the teeth of the rack 1 by a pressure piece 3, is mounted in a molded part of the steering gear housing 4 serving as pinion housing 5.
• the tie rods 6 are each connected to the rack 1 via axial joints 7.
• Axial joint and housing surfaces 8 and 9 form a stop pair 8 at both rack ends; 9.
• sling means 10; 11; 12 integrated.
• a sling 10; 1 1; 12 is made up of two flanges 10; 11 (Fig.
• the flange 10 which is arranged to be axially movable with respect to the housing 4, holds, with its annular end surface 13 facing away from the axial joint 7, a distance from the axially aligned surface 14 of the housing 4 in the relieved state.
• the surfaces 13; 14, which act as a mechanical end stop 13 and 14, the chambered, resilient material 12 is protected from overuse by misuse.
• This elastically resilient material 12 has undercuts 12 ′′, through which the force effect, the force introduced by a steering lock into this material 12 is specifically influenced and the deformation of which is directed in predetermined directions (no gap extrusion).
• the resilient material 12 is positively connected to the outer flange 11 or directly to the housing 4 by means of an elastic snap connection.
• Fixing the material 12 can also by an additional element, for. B. a locking ring, or by caulking, vulcanizing or gluing. Due to a fixed connection to the housing 4 or the flange 11, there are shear stresses due to relative movements, which additionally contribute to the damping. Furthermore, the occurrence of gap extrusions in the elastic material 12 is avoided.
• flange 10 may be connected to resilient material 12 using the same fasteners or methods.
• the flange 10 is connected to the material 12 by gluing.
• the steering gear housing 4 is used in the exemplary embodiment shown, so that on the axial joint 7 of the tie rod-rack connection, which is connected to the stop means 10; 1 1; 12 corresponding surface 8 is worked out.
• the elastic stop means 10; 1 1; 12 on the axial joint 7 or the rack 1 itself and the oppositely oriented end face 9 on the housing 4.
• the elastic stop means 10; 1 1; 12 are used at any time with power-assisted steering systems, such as hydraulic, pneumatic, electrohydraulic and electrical or power-assisted steering systems, such as a steer-by-wire steering system that works with a steering gear, d. H. the run-up noises described at the outset due to the inertia of an electric motor used for steering assistance are also eliminated.
• power-assisted steering systems such as hydraulic, pneumatic, electrohydraulic and electrical or power-assisted steering systems, such as a steer-by-wire steering system that works with a steering gear, d. H. the run-up noises described at the outset due to the inertia of an electric motor used for steering assistance are also eliminated.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Power Steering Mechanism (AREA)
• Transmission Devices (AREA)
• Steering Controls (AREA)
• Gears, Cams (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7700881

Family Applications (1)

Country Status (6)

Cited By (11)

Families Citing this family (18)

Citations (4)

Family Cites Families (3)

• 2001
  • 2001-09-28 DE DE10148262A patent/DE10148262A1/de not_active Withdrawn
• 2002
  • 2002-09-14 WO PCT/EP2002/010324 patent/WO2003029067A1/de not_active Ceased
  • 2002-09-14 EP EP02772302A patent/EP1429951B1/de not_active Expired - Lifetime
  • 2002-09-14 CN CNB028188667A patent/CN100374341C/zh not_active Expired - Fee Related
  • 2002-09-14 DE DE50203216T patent/DE50203216D1/de not_active Expired - Lifetime
  • 2002-09-14 US US10/489,145 patent/US7258035B2/en not_active Expired - Fee Related
  • 2002-09-14 JP JP2003532347A patent/JP4255832B2/ja not_active Expired - Fee Related

Patent Citations (4)

Non-Patent Citations (1)

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