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
  • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
  • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
  • B25H1/0007—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby for engines, motor-vehicles or bicycles

Definitions

• the present invention relates to a device for protecting a power unit of a motor vehicle.
• the invention belongs to the field of motor vehicle powertrains.
• a powertrain makes it possible to ensure the traction of a motor vehicle by driving the wheels of the vehicle.
• the powertrain usually comprises a motor and a gearbox that makes it possible to modify the gear ratio between the engine and the wheels of the vehicle.
• the engine and the gearbox are generally assembled to each other by screwing operations.
• Some powertrain components are fragile and may be damaged by contact with the tools used in these tightening operations.
• FR-B1 -2 988 025 discloses a protection device comprising a tubular guide allowing the introduction of a screwdriving tool, so as to protect the environment of the screwing tool when performing an operation of screwing.
• Such a device has the particular disadvantage of being expensive and bulky for the operator performing the screwing operations.
• the present invention proposes a protection device comprising a first protection means adapted to receive a screwdriving tool, remarkable in that it further comprises a cover adapted to cooperate with a housing of a computer of a motor vehicle power train for sealing this housing, the first protection means and the cover being in one piece.
• the invention avoids contact between the screwing tool fragile parts of the powertrain, without increasing the size of the screwing tool and with reduced cost.
• the first means constitutes a relief with respect to a surface of the cover.
• the first means has the shape of a gutter. According to a particular characteristic, the first means is designed so as to at least partially cover a connector of the housing mentioned above.
• the cover further comprises a second protection means designed to protect the end of a tube of the powertrain.
• the second protection means constitutes a bell adapted to receive the end of the tube mentioned above.
• the cover and the first protection means are obtained by a plastic injection method.
• the second protection means is obtained by the plastic injection method mentioned above.
• the invention also relates to a powertrain of a vehicle comprising at least one protective device.
• the invention also relates to a motor vehicle comprising such a powertrain.
• FIG. 1 is a view of a powertrain incorporating a protection device according to a first embodiment of the invention, during a screwing operation;
• FIGS. 2 to 4 are zooms on the protection device and the screwing tool of FIG. 1;
• FIG. 5 is a view of a powertrain incorporating a protection device according to a second particular embodiment of the invention, during a screwing operation;
• FIG. 6 is a zoom on the protection device of FIG. 5.
• FIGS. 1 to 4 show a power unit of a motor vehicle comprising a heat engine 10, a gearbox 20, a protection device 30 and a computer case 40 according to a first embodiment of the invention.
• the attachment 20 is for example a screw or a bolt which must be screwed or unscrewed by a screwing tool 50.
• the screwing tool 50 also called a screwdriver, comprises a handle 51 for gripping the tool 50 by an operator and an extension 52 intended to cooperate with the fastener 21 during the screwing operations.
• the gearbox 20 is for example an automatic gearbox, but other types of gearboxes can be envisaged, since this gearbox is implanted in an environment making it difficult to access the fastener 21.
• the gearbox 20 may also include a tube 22, said breather, for venting the gearbox housing.
• a tube 22 is generally made of a flexible material and therefore presents a risk of damage in the event of contact with the screwing tool 50.
• the tube 22 can also complicate access to the fastener 21 by the tool 50.
• one end of the tube 22 is close to the fastener 21 and therefore presents a risk of contact. with the screwing tool 40.
• the housing 40 is fixed on the gearbox 20 and contains a computer for controlling the gearbox 20.
• the housing 40 further comprises a connector 45 for connecting the computer to other elements by means of a cable (not shown).
• the protective device 30 comprises a cover 31 adapted to cooperate with the housing 40 so as to seal the housing 40.
• the protective device 30 is generally made of plastic.
• the tip 42 of the screwing tool may come into contact with the connector 45 or with the tube 22.
• the protection device 30 further comprises a first protection element 32, adapted to receive the screwing tool 50.
• a first protection element 32 adapted to receive the screwing tool 50.
• the first protection element 32 and the cover 31 are in one piece.
• the cover 31 and the first protection element 32 are for example obtained by a plastic injection process.
• the first protection element 32 forms a relief with respect to a surface of the cover 31 and has for example the shape of a gutter, or notch.
• the span length of the first protection element 32 is defined so as to ensure the best compromise between the guidance of the tool 50 and the size of this protection element 32.
• this range of length may be between 5 and 80 mm.
• Figures 5 and 6 show a powertrain of a motor vehicle comprising the heat engine 10, the gearbox 20, the computer housing 40 and a protection device 130 according to a second particular embodiment of the invention.
• the cylinder block of the engine 10 and the gearbox 20 are also assembled to one another by at least one fastener 21, identical to that of FIGS. 1 to 4, which must be screwed or unscrewed by the screwing 50.
• the protection device 130 comprises a cover 131, generally made of plastic.
• the protection device 130 furthermore comprises a first protection element 132 adapted to receive the screwing tool 50 and a second protection element 133 designed to protect the end of the tube 22.
• a first protection element 132 adapted to receive the screwing tool 50
• a second protection element 133 designed to protect the end of the tube 22.
• the first protection element 132 is represented here with a greater span length than that of the protection element 32 shown in FIGS. 1 to 4. However, the first protection element 132 may have a shorter length, this length being defined by so as to ensure the best compromise between the guide of the tool 50 and the size of this protection element 132. For example, this range of length may be between 5 and 80 mm.
• the first protection element 132, the second protection element 133 and the cover 131 are in one piece.
• the cover 131, the first protection element 132 and the second protection element 133 are for example obtained by a plastic injection process.
• the first protection element 132 constitutes a relief relative to the cover 131 and is for example in the form of a gutter, or notch, and the second protection element 133 has the shape of a bell adapted to receive the end of the tube 22.
• the second protection element 133 makes it possible to create a physical abutment between the screwing tool 50 and the end of the tube 22, which protects the tube from possible aggressions of the tool 50 during assembly or disassembly operations. powertrain. So, the second element of protection 133 allows the protection device 130 to provide better protection for the tube 22 than in the first embodiment of the invention described in FIGS. 1 to 4.
• the bell-shaped second protection element 133 further has the advantage of protecting the end of the tube 22 from splashing water. Such splashes of water may for example be caused by the passage of a ford by the vehicle.
• Such a device avoids contact between a screwing tool and a fragile part of the powertrain, without increasing the size of the screwing tool and with reduced cost.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Details Of Gearings (AREA)
• Connection Of Plates (AREA)
• Motor Or Generator Frames (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=53879626

Family Applications (1)

Country Status (4)

Citations (3)

Family Cites Families (3)

• 2015
  • 2015-05-11 FR FR1554164A patent/FR3036051B1/fr not_active Expired - Fee Related
• 2016
  • 2016-04-14 EP EP16731202.4A patent/EP3294499B1/fr active Active
  • 2016-04-14 WO PCT/FR2016/050862 patent/WO2016181045A1/fr unknown
  • 2016-04-14 CN CN201680026974.4A patent/CN107635728B/zh active Active

Patent Citations (3)

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