The present disclosure relates to a winch mounting apparatus. More particularly, but not exclusively, the present disclosure relates to a winch mounting apparatus for mounting a winch to a vehicle.
It is known to mount a winch to the front of a vehicle to provide a winching capability, for example to enable self-recovery of the vehicle, to assist recovery of another vehicle or to pull a load. The winch can, for example, be mounted to a vehicle intended for use off-road, such as a 4x4 vehicle, a utility vehicle or a sports utility vehicle (SUV). In view of the loads applied, the winch must be mounted to a sturdy structure positioned at the front of the vehicle. However, this is in the region of the vehicle that is usually used to absorb energy during the event of a frontal collision in modern vehicles, and so mounting a winch in this manner may result in a compromise between winching capability and energy absorption performance due to these opposing requirements.
It is known to provide a winch mounting assembly comprising a winch cradle in front of the vehicle bumper beam. A limitation of these types of winch mounting assemblies is that the winch cradle is typically only supported in a single plane and, therefore, fixings need to provide a sufficient clamping force to prevent the winch cradle from rotating relative to the vehicle in use, for example due to vibrations. To provide adequate clamping force, the fixings may be unintentionally over-tightened with the result that rearward movement of the winch mounting assembly may be impeded which can affect deformation of the crash structure in the event of a collision.
At least in certain embodiments, the present invention seeks to provide a secure winch mounting assembly for fixedly mounting a winch to a vehicle. Furthermore, at least in certain embodiments, the winch mounting assembly is arranged to work in conjunction with the vehicle crash structure to absorb energy in the event of a collision.
Aspects of the present invention relate to a winch mounting apparatus; and to a vehicle having a winch mounting apparatus. Aspects of the present invention also relate to a method of installing a winch mounting apparatus to a vehicle.
According to a further aspect of the present invention there is provided a winch mounting assembly for mounting a winch to a vehicle, the winch mounting assembly comprising:
The winch mounting assembly can be mounted to the vehicle in place of, or supplementary to a vehicle bumper beam. To ensure the system can manage the recovery/winching loads, the winch mounting assembly is configured to prevent movement during winching whist permitting rearward movement in the event of a frontal collision.
The winch mounting assembly can comprise one or more sliding joint. For example, the winch mounting assembly can comprise first and second sliding joints disposed on respective first and second sides of the winch cradle. The winch mounting assembly can comprise a plurality of mounting brackets. The mounting brackets can cooperate with the winch cradle to form a plurality of sliding joints. The winch mounting assembly can comprise a plurality of crush can devices. One or more of said sliding joints can be associated with each crush can device. For example, a first sliding joint can be associated with a first crush can device; and a second sliding joint can be associated with a second crush can device.
The crush can device and the sliding joint can be disposed alongside each other. The crush can device may define a central longitudinal axis which in certain embodiments is arranged at least substantially parallel to a sliding axis of the sliding joint. One or more crush can device can be associated with each sliding joint.
Each mounting bracket can comprise at least one guide member. The winch cradle can comprise at least one sliding bracket for cooperating with said at least one guide member to form the at least one sliding joint. The at least one guide member and the at least one sliding bracket can have matching profiles. This arrangement can inhibit movement of the sliding joint in one or more direction, for example in a transverse direction and/or a vertical direction.
The mounting bracket can comprise first and second guide members, and the sliding bracket comprises first and second sliding members. The first and second guide members and the first and second sliding members can cooperate to inhibit movement of the sliding joint in first and second directions. The first and second guide members can be arranged substantially perpendicular to each other to form an L-shaped profile. Similarly, the first and second sliding members can be arranged substantially perpendicular to each other to form an L-shaped profile. This arrangement can secure the winch cradle in the horizontal and vertical planes and constrain movement in a longitudinal direction.
The first and second guide members can each comprise first and second elongated slots. The first and second sliding members can each comprise third and fourth elongated slots. The first and second slots are operatively aligned with the third and fourth elongated slots. First and second sliding fasteners can be disposed in elongated slots to form first and second sliding joints. The first and second sliding fasteners can be disposed in said elongated slots such that the winch cradle is only able to move in a rearwards direction. By rearward direction it is meant, in a direction towards and substantially parallel to the longitudinal axis of the vehicle. For example, the first and second sliding fasteners can be disposed at a front of said first and second elongated slots; and at a rear of the third and fourth elongated slots.
The winch cradle can comprise at least one transfer member for engaging a distal end of the at least one crush can device. In the event of a frontal collision, the at least one transfer member is configured to transfer collision loads applied to the winch cradle into the at least one crush can device. A reinforcing member can be provided for reinforcing each transfer member. The reinforcing member can be inclined at an acute angle relative to the transfer member. The reinforcing member can, for example, extend from a distal end of the transfer member to a side wall of the winch cradle. The reinforcing member can help to reduce deformation of the at least one transfer member.
The at least one transfer member can comprise at least one section extending operatively towards the vehicle chassis member. For example, the at least one transfer member can comprise upper and lower flanges. The upper and lower flanges can extend towards a base portion of the mounting bracket. The at least one flange can be sized to limit displacement of the winch cradle in a rearwards direction. The at least one flange can, for example, be sized to engage the base portion of the mounting bracket when the crush can device has been crushed by a prescribed amount.
The at least one crush can device in certain embodiments may be fastened to the mounting bracket and/or to the winch cradle. Mechanical fasteners can be used to mount the at least one crush can device to the mounting bracket and/or to the winch cradle.
The winch cradle can comprise a front plate for positioning behind a front bumper or a front valance disposed on the vehicle. The front plate can be profiled to match the profile of the front bumper or the front valance or fascia.
A cable dispensing aperture can be formed in said front plate. The cable from the winch can be extended through said cable dispensing aperture. The front bumper can comprise a corresponding bumper aperture.
According to a still further aspect of the present invention there is provided a winch mounting assembly for mounting a winch to a vehicle, the winch mounting assembly comprising:
According to a yet further aspect of the present invention there is provided a winch mounting assembly as described herein in combination with a winch.
According to a still further aspect of the present invention there is provided a vehicle comprising a winch mounting assembly as described herein. The winch mounting assembly can be mounted to a vehicle chassis member, such as a front cross member. A front bumper can be disposed in front of said winch mounting assembly
According to a further aspect of the present invention there is provided a method of mounting a winch mounting assembly to a vehicle chassis, the method comprising: detaching a front bumper beam from the vehicle chassis; removing at least one crush can device from the vehicle chassis and installing said at least one crush can device in the winch mounting assembly; and mounting the winch mounting assembly to the vehicle chassis. The at least one crush can device can be installed in the winch mounting assembly before or after the winch mounting assembly is mounted to the vehicle chassis.
The term “crush can device” is used herein to refer to a sacrificial crash structure configured to deform in a controlled manner under loading. The crush can device can, for example, comprise a metal cylinder (which may be open or closed). Alternative terms for these crash structures include: an “absorber” and a “crash can device”. Other energy absorbing devices, such as foam, are also contemplated.
Within the scope of this application it is expressly intended that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the claims and/or in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. That is, all embodiments and/or features of any embodiment can be combined in any way and/or combination, unless such features are incompatible. The applicant reserves the right to change any originally filed claim or file any new claim accordingly, including the right to amend any originally filed claim to depend from and/or incorporate any feature of any other claim although not originally claimed in that manner.
One or more embodiments of the present invention will now be described, by way of example only, with reference to the accompanying figures, in which:
A winch mounting assembly 1 for mounting a recovery winch 2 to a vehicle chassis in accordance with an embodiment of the present invention will now be described with reference to
The winch mounting assembly 1 is mounted to first and second longitudinal chassis members 4-1, 4-2 (shown in phantom in
As shown in
The winch cradle 6 comprises a tray 11 and first and second transfer members 12-1, 12-2, as shown in
As shown in
As shown most clearly in
The retro-fitting of the winch mounting assembly 1 to the vehicle 3 will now be described. The front bumper is removed from the vehicle 3. The first and second crush can devices 8-1, 8-2 support a vehicle bumper beam (not shown) which is removed. The first and second crush can devices 8-1, 8-2 can then be removed from the first and second longitudinal chassis members 4-1, 4-2. The first and second sliding fasteners 26-1, 26-2 in the winch mounting assembly 1 are loosened to enable the first and second sliding joints 20-1, 20-2 to be extended. The first and second crush can devices 8-1, 8-2 are inserted between the first and second mounting brackets 7-1, 7-2 and the respective first and second transfer members 12-1, 12-2. The crush can devices 8-1, 8-2 are then mechanically fastened to the first and second mounting brackets 7-1, 7-2 and the first and second transfer members 12-1, 12-2. The first and second sliding joints 20-1, 20-2 are then tightened to a predetermined torque (55 Nm in the present case). The first and second mounting brackets 7-1, 7-2 are mechanically fastened to the first and second longitudinal chassis members 4-1, 4-2 to mount the winch support assembly 1. The winch 2 can then be mounted in the winch cradle 6. The front bumper 5 is then mounted to the vehicle 3 to cover the winch mounting assembly 1 and the winch 2. The front bumper 5 is mounted in juxtaposition with the front plate 14 of the winch cradle 6. The front bumper 5 is mounted such that the bumper aperture aligns with the cable dispensing aperture 17 formed in the front plate 14. The winch cable is fed through the cable dispensing aperture 17 ready for use. Rather than retro-fit the winch mounting assembly 1 to the vehicle 3, the winch mounting assembly 1 and the recovery winch 2 can be installed during assembly of the vehicle 3, for example on a vehicle production line, in place of the vehicle bumper beam.
In normal use, the winch mounting assembly 1 supports the recovery winch 2 at the front of the vehicle 3. The first and second sliding joints 20-1, 20-2 are adapted to inhibit transverse and vertical movement of the winch mounting assembly 1. In particular, the horizontal arrangement of the first guide member 21-1 and the first sliding member 24-1 inhibit vertical movement of the winch cradle 6; and the vertical arrangement of the second guide member 21-2 and the second sliding member 24-2 inhibit transverse movement of the winch cradle 6. The first and second support legs 27-1, 27-2 provide additional vertical support for the winch mounting assembly 1. This arrangement allows the winch mounting assembly 1 to be fixedly mounted to the vehicle chassis without over-tightening the first and second sliding fasteners 26-1, 26-2. Rather, the first and second sliding fasteners 26-1, 26-2 can be tightened to a predefined torque (55 Nm in the present case) which determines the slip force required to displace the winch cradle 6. The first and second crush can devices 8-1, 8-2 are supported between the first and second mounting brackets 7-1, 7-2 and the first and second transfer member 12-1, 12-2.
In the event of a frontal collision, the winch mounting assembly 1 is configured to absorb energy rather than transmit it directly into the vehicle chassis. The base plate aperture 16 enables controlled deformation of the base plate 13 to help balance the transmittal of loads to the first and second sliding joints 20-1, 20-2. The application of a force exceeding the slip force (as determined by the first and second sliding fasteners 26-1, 26-2) causes the winch cradle 6 to be displaced in a rearwards direction towards the vehicle, driven by the force applied. The first and second sliding joints 20-1, 20-2 constrain the winch cradle 6 to travel in a longitudinal direction. The first guide member 21-1 and the first sliding member 24-1 inhibit vertical movement of the winch cradle 6; and the second guide member 21-2 and the second sliding member 24-2 inhibit transverse movement of the winch cradle 6. The first and second transfer members 12-1, 12-2 thereby apply a longitudinal force to the first and second crush can devices 8-1, 8-2 which is substantially parallel to their central axes. The first and second crush can devices 8-1, 8-2 undergo controlled and progressive deformation to absorb energy from the collision. Once the first and second crush can devices 8-1, 8-2 have collapsed to approximately 25% of their original length, the first and second transfer members 12-1, 12-2 engage the first and second back plates 9-1, 9-2 and are operative to transfer force into the vehicle chassis. In the event of a frontal collision in which the loads are insufficient to fully collapse the first and second crush can devices 8-1, 8-2, the loads applied to the vehicle chassis are insufficient to result in deformation. It will be appreciated that the winch mounting assembly 1, the front bumper 5, and the first and second crush can devices 8-1, 8-2 can be replaced.
The SRS control is typically calibrated to deploy airbags and/or seatbelt pre-tensioners in the vehicle 3 in dependence on a detected acceleration profile being above a certain threshold, which is at least partially determined by the energy absorption properties of the first and second crush can devices 8-1, 8-2. By utilising first and second crush can devices 8-1, 8-2 having the same mechanical properties as those installed in the vehicle 3 as standard to support the front bumper 5 (i.e. when the winch mounting assembly 1 is not fitted), the operation of the supplemental restraint system control can be developed to include consideration of the winch mounting assembly 1, inside its deployment thresholds calibration. It will be appreciated that if the winch mounting assembly 1 is retro-fitted to the vehicle 3, the first and second crush can devices 8-1, 8-2 used to support the front bumper 5 can be incorporated into the winch mounting assembly 1.
The first and second transfer members 12-1, 12-2 are effective to transfer collision loads into the respective first and second crush can devices 8-1, 8-2. This can expedite decision making by the SRS control compared to prior art arrangements which introduce an indirect load path or which require that the winch mounting assembly is displaced before collision loads are transmitted to the SRS control. By connecting the first and second transfer members 12-1, 12-2 to the respective first and second crush can devices 8-1, 8-2, loads can be transmitted directly into the first and second crush can devices 8-1, 8-2. In the event of a frontal collision, a crash pulse can be transmitted through the first and second crush can devices 8-1, 8-2 to the SRS control at least substantially instantaneously. This can reduce the time taken by the SRS control to deploy one or more supplemental restraint, such as an airbag, a seatbelt pre-tensioner, etc. In an alternative arrangement, the first and second transfer members 12-1, 12-2 are not fastened to the first and second crush can devices 8-1, 8-2. Instead, the first and second transfer members 12-1, 12-2 are disposed in contact with the first and second crush can devices 8-1, 8-2.
It will be appreciated that the winch mounting assembly 1 described herein may be readily adapted for use on the rear structure of a vehicle, for example to facilitate recovery or towing of other vehicles. In this case, the energy absorption mechanisms described above for mitigating forces applied by the impact to the front of the vehicle will provide a similar benefit to the rear of the vehicle in a rear mounted application and similarly may provide advantageous reduction in vehicle repair costs if the vehicle sustains a rear impact.
It will be appreciated that various changes and modifications can be made to the winch mounting assembly 1 described herein without departing from the scope of the present application.
Number | Date | Country | Kind |
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1507367.9 | Apr 2015 | GB | national |
Filing Document | Filing Date | Country | Kind |
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PCT/EP2016/059289 | 4/26/2016 | WO | 00 |