GB2356910A - Device for taking up axial play in a geared unit - Google Patents

Device for taking up axial play in a geared unit Download PDF

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Publication number
GB2356910A
GB2356910A GB0028476A GB0028476A GB2356910A GB 2356910 A GB2356910 A GB 2356910A GB 0028476 A GB0028476 A GB 0028476A GB 0028476 A GB0028476 A GB 0028476A GB 2356910 A GB2356910 A GB 2356910A
Authority
GB
United Kingdom
Prior art keywords
shaft
end portion
motor unit
geared motor
end portions
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.)
Granted
Application number
GB0028476A
Other versions
GB2356910B (en
GB0028476D0 (en
Inventor
Luigi Conti
Saverio Nuzzo
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.)
Gate SRL
Original Assignee
Gate SRL
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 Gate SRL filed Critical Gate SRL
Publication of GB0028476D0 publication Critical patent/GB0028476D0/en
Publication of GB2356910A publication Critical patent/GB2356910A/en
Application granted granted Critical
Publication of GB2356910B publication Critical patent/GB2356910B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/12Arrangements for adjusting or for taking-up backlash not provided for elsewhere
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/021Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/021Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H2057/0213Support of worm gear shafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/021Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H57/022Adjustment of gear shafts or bearings
    • F16H2057/0221Axial adjustment

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)

Abstract

The device comprises a monolithic spacer body 11 including a first end portion 12 and a second end portion 13, spaced apart axially facing one another, and axially connected by a plurality of resilient deformable members 14 which allow the end portions 12, 13 to move towards one another when the spacer body 11 is subjected to an axial compression stress. The body 11 is intended to be interposed, in an axially loaded condition, between an end of the shaft 4 and a corresponding abutment 2a provided in the casing 2.

Description

2356910 P101865GB A device for taking up the axial play in a geared motor
unit The present invention relates to a device for taking up the axial play of the shaft of a geared motor unit relative to the support casing in which the shaft is mounted rotatably.
Figure 1 of the appended drawings is a partially-sectioned view of a geared motor unit according to the prior art. This geared motor unit I comprises, in known manner, a support casing formed by a shaped body 2 to which a substantially cup-shaped body is connected.
The stator S of the electric motor of the geared motor unit is fixed in the cup-shaped body and the rotor R is mounted rotatably in the stator. The rotor is carried by a shaft 4 which has one end mounted rotatably in a bush-like bearing 5 housed in the end portion of the cup-shaped body 3. The other end of the shaft 4 is mounted rotatably in a ftu-ther bearing bush 6 mounted in the body 2.
The portion of the shaft 4 which extends in the body 2 has a helical thread 7 so that the shaft acts as a worm screw in operation. The thread 7 of the shaft meshes with the teeth of a gear W with which it forms the gearing-down unit of the geared motor unit.
In the solution according to the prior art shown in Figure 1, a threaded opening 8 is formed in the vicinity of the end of the shaft 4 and a grub screw 9, preferably provided with a toric sealing ring 10, is screwed therein. The grub screw 9 bears against the end of the shaft 4.
During assembly, in order to take up the axial play of the shaft 4 relative to the casing 2, 3 of the geared motor unit due to the manufacturing tolerances of the bodies 2 and 3 as well as of the shaft 4 itself, the position of the grub screw 9 has to be adjusted appropriately by manual operation or by a specific automated device.
This known solution is constructionally costly and operatively expensive.
An object of the invention is therefore to provide a device which enables the axial play between the shaft of a geared motor unit and the support casing in which the shaft is mounted rotatably to be taken up more easily, quickly and cheaply.
2 This and other objects are achieved, according to the invention, by a device the main

Claims (8)

  1. characteristics of which are defined in appended Claim 1.
    Further characteristics and advantages of the invention will become clear from the following detailed description given purely by way of non-limiting example, with reference to the appended drawings, in which:
    Figure 1, already described, shows a geared motor unit according to the prior art, Figure 2 is a side view of a device according to the invention, Figure 3 is a cross-section taken on the line 111-111 of Figure 2, Figure 4 is a sectioned view showing a device according to the invention, on an enlarged scale, in the mounted condition of use, Figure 5 is a side view of another device according to the invention, and Figure 6 is a cross-section taken on the line VI-VI of Figure 5.
    In Figures 2 to 4, a device according to the invention is generally indicated 11. The device comprises a monolithic body which is preferably made of a plastics material such as an acetal resin, and which has two substantially plate-shaped end portions 12 and 13. The portions 12 and 13 are spaced apart axially, face one another, and are interconnected axially by a plurality of resiliently deformable members 14. These interconnection members 14 allow the end portions 12 and 13 to move towards one another when the body 11 is subjected to an axial compression stress. In the embodiment of Figures 2 to 4, the interconnection members 14 have a shape which is curved in a transverse direction at rest, as can be seen in particular in Figure 2.
    At least one, but preferably both of the end portions 12 and 13 of the body 11 have respective non-circular shapes so that they can be positioned in respective seats of 3 corresponding shape provided in the casing or body 2 of the geared motor unit in a manner such that rotation of the body 11 is prevented in the assembled condition.
    As can be seen in particular in Figure 2, at least one and preferably two longitudinal appendages 15 extend from at least one of the two end portions of the spacer body I I towards the other end portion of the body 11. These appendages 15 are of a lengh such that, at rest, their end faces are spaced from the other end portion of the body 11 whereas, in the condition of use, as will become clearer from the following, they can limit the movement of the end portions 12 and 13 towards one another to a predetermined value.
    The spacer body 11 is shown in the mounted condition of use in Figure 4. As can be seen in this drawing, the spacer body 11 is arranged with its end portion 12 in abutment with a stop surface 2a of the body or support casing 2 which, with the use of the device according to the invention, no longer necessarily has to have the end opening 8 mentioned with reference to Figure 1.
    In the mounted condition, the end portion 13 of the spacer body 11 faces the end of the shaft 4 of the geared motor unit. This end portion 13 advantageously has a rounded, convex end projection 16 which bears against the end of the shaft 4. This projection reduces both sliding friction and the current consequently absorbed by the electric motor of the geared motor unit, in operation.
    In the mounted condition (Figure 4), the spacer body 11 is loaded axially but without the end faces of its appendages 15 being in contact with the end portion 12.
    In operation, however, these appendages 15 can limit any axial travel of the shaft 4 of the geared motor unit.
    Figures 5 and 6 show a variant. In these drawings, parts and elements already described have again been attributed the same reference numerals.
    4 In the embodiment of Figures 5 and 6, the end portions 12 and 13 are interconnected by a plurality of resiliently deformable members 14 which have a longitudinally corrugated shape. Otherwise, both from the structural point of view and from the assembly point of view, the device I I of Figures 5 and 6 corresponds substantially to the device described above with reference to Figures 2 to 4.
    Naturally, the principle of the invention remaining the same, the forms of embodiment and details of construction may be varied widely with respect to those described and illustrated purely by way of non-limiting example, the invention extending to all embodiments which achieve equal utility by virtue of the same innovative concepts.
    Claims 1. A device for taking up the axial play of the shaft (4) of a geared motor unit (1) relative to the support casing (2, 3) in which the shaft (4) is mounted rotatably, characterized in that it comprises a monolithic spacer body (11) including a first substantially plate-like end portion and a second substantially plate- like end portion (12, 13) spaced apart axially, facing one another, and interconnected axially by a plurality of resiliently deformable members (14) which allow the end portions (12, 13) to move towards one another when the spacer body (11) is subjected to an axial compression stress, the body (11) being intended to be interposed, in an axially loaded condition, between an end of the shaft (4) and a corresponding abutment or stop surface (2a) provided in the casing (2, 3).
  2. 2. A device according to Claim I in which at least one of the end portions (12, 13) of the body (11) has a non-circular shape and can be positioned in a seat of corre sponding shape provided in the casing (2, 3) in a manner such that rotation of the body (11) is prevented in the mounted condition.
  3. 3. A device according to Claim I or Claim 2 in which at least one longitudinal appendage (15) extends from at least one of the end portions (12, 13) of -the body (11) towards the other end portion (13, 12) of the body (11) and has an axial length such that it can limit the movement of the end portions (12, 13) towards one another to a predetermined value.
  4. 4. A device according to any one of the preceding claims in which the interconnection members (14) have a shape which is curved in a transverse direction at rest.
  5. 5. A device according to any one of Claims I to 3 in which the interconnection members (14) have a longitudinally corrugated shape.
  6. 6 6. A device according to any one of the preceding claims, characterized in that the end portion (13) which is intended to face the shaft (4) of the geared motor unit (1) has a rounded and convex end projection (16) for bearing against the end of the shaft (4).
  7. 7. A device according to any one of the preceding claims, characterized in that the body (11) is made of a plastics material, preferably an acetal resin.
  8. 8. A device for taking up the axial play of the shaft of a geared motor unit relative to the support casing in which the shaft is rotatably mounted, substantially as herein described with reference to and illustrated in any of Figures 2 to 6 of the accompanying drawings.
GB0028476A 1999-11-30 2000-11-22 A device for taking up the axial play in a geared motor unit Expired - Fee Related GB2356910B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO990211 IT248788Y1 (en) 1999-11-30 1999-11-30 DEVICE FOR THE RECOVERY OF THE AXIAL PLAY IN A GEARMOTOR.

Publications (3)

Publication Number Publication Date
GB0028476D0 GB0028476D0 (en) 2001-01-10
GB2356910A true GB2356910A (en) 2001-06-06
GB2356910B GB2356910B (en) 2003-11-12

Family

ID=11417643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0028476A Expired - Fee Related GB2356910B (en) 1999-11-30 2000-11-22 A device for taking up the axial play in a geared motor unit

Country Status (4)

Country Link
DE (1) DE20020174U1 (en)
FR (1) FR2801651B3 (en)
GB (1) GB2356910B (en)
IT (1) IT248788Y1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1447305A2 (en) * 2003-02-14 2004-08-18 Koyo Seiko Co., Ltd. Worm shaft movable amount adjustment method, worm shaft movable amount adjustment apparatus and elastic support assembly for electric power steering apparatus
WO2007036385A1 (en) * 2005-09-26 2007-04-05 Robert Bosch Gmbh Axial backlash-adjusted transmission drive unit
WO2010116125A1 (en) * 2009-04-06 2010-10-14 H.R. Adcock Limited A gearbox and a driving assembly therefor
EP2242142A1 (en) * 2009-04-13 2010-10-20 Moteck Electric Corp. Rotating mechanism having buffering function
EP1914448A3 (en) * 2006-10-11 2011-03-23 Johnson Electric S.A. Worm gear drive
WO2014108317A1 (en) * 2013-01-08 2014-07-17 Robert Bosch Gmbh Shaft thrust arrangement and actuating drive
CN105008647B (en) * 2013-03-14 2017-04-26 罗伯特·博世有限公司 Gearing drive unit and a comfort drive comprising a gearing drive unit
CN109104037A (en) * 2017-06-21 2018-12-28 罗伯特·博世有限公司 Start mushroom-shaped part and with such motor for starting mushroom-shaped part

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013226842A1 (en) * 2013-12-20 2015-06-25 Volkswagen Aktiengesellschaft Arrangement for mounting a worm shaft arranged in a housing of a worm gear in the region of the end face of a worm shaft end
DE102015209528A1 (en) * 2015-05-22 2016-11-24 Robert Bosch Gmbh Transmission drive device and method for manufacturing a transmission drive device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513970A1 (en) * 1995-04-13 1996-10-17 Webasto Karosseriesysteme Drive appts. for motor vehicle sun-roof or windows
US5671636A (en) * 1996-01-24 1997-09-30 Heidelberg Harris Inc. Method and apparatus for preventing circumferential separation between two gears of a gear train
WO1997043564A2 (en) * 1996-05-03 1997-11-20 Meritor Light Vehicle Systems - France Reducing motor, particularly for operating vehicle fittings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513970A1 (en) * 1995-04-13 1996-10-17 Webasto Karosseriesysteme Drive appts. for motor vehicle sun-roof or windows
US5671636A (en) * 1996-01-24 1997-09-30 Heidelberg Harris Inc. Method and apparatus for preventing circumferential separation between two gears of a gear train
WO1997043564A2 (en) * 1996-05-03 1997-11-20 Meritor Light Vehicle Systems - France Reducing motor, particularly for operating vehicle fittings

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1447305A2 (en) * 2003-02-14 2004-08-18 Koyo Seiko Co., Ltd. Worm shaft movable amount adjustment method, worm shaft movable amount adjustment apparatus and elastic support assembly for electric power steering apparatus
EP1447305A3 (en) * 2003-02-14 2005-05-11 Koyo Seiko Co., Ltd. Worm shaft movable amount adjustment method, worm shaft movable amount adjustment apparatus and elastic support assembly for electric power steering apparatus
EP1726510A1 (en) * 2003-02-14 2006-11-29 JTEKT Corporation Worm shaft movable amount adjustment method, worm shaft movable amount adjustment apparatus and elastic support assembly for electric power steering apparatus
US7177744B2 (en) 2003-02-14 2007-02-13 Koyo Seiko Co., Ltd Elastic support assembly for electric power steering apparatus
CN101365898B (en) * 2005-09-26 2012-11-28 罗伯特·博世有限公司 Axial backlash-adjusted transmission drive unit
WO2007036385A1 (en) * 2005-09-26 2007-04-05 Robert Bosch Gmbh Axial backlash-adjusted transmission drive unit
EP1914448A3 (en) * 2006-10-11 2011-03-23 Johnson Electric S.A. Worm gear drive
US8051737B2 (en) 2006-10-11 2011-11-08 Johnson Electric S.A. Worm gear drive
WO2010116125A1 (en) * 2009-04-06 2010-10-14 H.R. Adcock Limited A gearbox and a driving assembly therefor
EP2242142A1 (en) * 2009-04-13 2010-10-20 Moteck Electric Corp. Rotating mechanism having buffering function
WO2014108317A1 (en) * 2013-01-08 2014-07-17 Robert Bosch Gmbh Shaft thrust arrangement and actuating drive
CN105008647B (en) * 2013-03-14 2017-04-26 罗伯特·博世有限公司 Gearing drive unit and a comfort drive comprising a gearing drive unit
CN109104037A (en) * 2017-06-21 2018-12-28 罗伯特·博世有限公司 Start mushroom-shaped part and with such motor for starting mushroom-shaped part

Also Published As

Publication number Publication date
IT248788Y1 (en) 2003-02-20
ITTO990211V0 (en) 1999-11-30
DE20020174U1 (en) 2001-02-22
FR2801651A3 (en) 2001-06-01
GB2356910B (en) 2003-11-12
ITTO990211U1 (en) 2001-05-30
FR2801651B3 (en) 2001-11-02
GB0028476D0 (en) 2001-01-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20051122