JP2023144347A - Snow removal trailer with means for detecting vehicle of third party - Google Patents

Abstract

To provide a snow removal trailer with means for detecting a vehicle of a third party.SOLUTION: The present invention relates to a swivel type snow removal trailer (1) to be towed by a traction vehicle (3) comprising a traction hitch (4). The trailer includes: a chassis (5) extending longitudinally in a chassis direction (I-I) between a front end (5a) of the chassis and a rear end (5b) of the chassis and extending in a lateral direction between a first face (5c) of the chassis and a second face (5d) of the chassis at mutually opposite sides; a snow removal blade (6) supported along the first face (5c) of the chassis; and detection means (10) capable of generating a presence signal when the snow removal trailer (1) swivels and an object or an individual is present in an area (A1) of a side part and/or an area (A2) of a rear part of the second face (5d) of the chassis.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD This invention relates to removing snow from roadways, and more particularly to snow removal trailers intended to be towed by vehicles equipped with towing hitches.

For simultaneously removing snow from several lanes of a roadway using a single towing vehicle, a snow removal trailer is known, which is described in Patent Document 1.
a chassis extending longitudinally in the chassis direction between a front end of the chassis and a rear end of the chassis, and extending laterally between a first side of the chassis and a second side of the chassis that are opposite to each other;
a snow removal blade supported along the first side of the chassis;
at least one wheel designed to support the chassis with respect to the ground, the axle of the wheel being arranged by orientation means to a first wheel position in which the axis of the axle around which the wheel rotates is orthogonal to the direction of the chassis; , at least one wheel selectively oriented between at least a second wheel position in which the axis of the axle about which the wheel rotates makes an axle angle greater than 90° with the chassis direction;
a drawbar capable of connecting the front end of the chassis to a tow hitch of a towing vehicle.

Another snow removal trailer is described in US Pat.

US Pat. No. 5,001,002 describes a system for steering rear wheels, which is suitable for use in motor vehicles, as it is a system that includes an object detector, an actuator, and a controller. When making a turn, object detectors are used to detect any potential objects that are close to the side of the vehicle and can only exist on the inside of the bend. When an object is detected, the actuator is used to adjust the rearward steering angle of the vehicle's rear wheels to avoid the object as the host vehicle moves.

In the second position of the wheels, the snowplow trailer is laterally offset and oriented obliquely to the direction of travel of the towing vehicle.

It has been found that certain drivers of third party vehicles have a tendency to try to overtake snowplow vehicles. In this case, especially in poor visibility conditions, some of the third party's vehicles may proceed until they are next to the trailer and directly behind the towing vehicle. As a result, the trailer may cross a third party's vehicle if at least one wheel is returned from the second position to the first wheel position at an inappropriate moment, for example at the command of the driver of the towing vehicle. In some cases, the object may be pushed aside (sweep: dragged).

US Patent Application Publication No. 2006/0143952 European Patent Application Publication No. 3196361 U.S. Patent No. 9,944,318

The problem that the present invention proposes to address is to limit the risk when a snowplow trailer is oriented obliquely to the direction of travel of the towing vehicle through actuation of the means used to orient at least one wheel. It is to be.

To achieve these and other objectives, the invention proposes a snowplow trailer intended to be towed by a towing vehicle equipped with a towing hitch. The snow removal trailer is
a chassis extending longitudinally in the chassis direction between a front end of the chassis and a rear end of the chassis, and extending laterally between a first side of the chassis and a second side of the chassis that are opposite to each other;
a snow removal blade supported along the first side of the chassis;
at least one wheel designed to support the chassis with respect to the ground, the axle of the wheel being arranged by orientation means to a first wheel position in which the axis of the axle around which the wheel rotates is orthogonal to the direction of the chassis; , at least one wheel selectively oriented between at least a second wheel position in which the axis of the axle about which the wheel rotates makes an axle angle greater than 90° with the chassis direction;
a drawbar capable of connecting the front end of the chassis to a tow hitch of a towing vehicle;
The snow removal vehicle according to the invention generates a presence signal when the wheels are in the second wheel position and an object or person is in the region of the side and/or the rear of the second side of the chassis. It further includes a detection means capable of detecting.

In such a snow removal trailer according to the invention, the presence signal alerts the driver of the towing vehicle so that the driver is not in a dangerous position relative to the snow removal trailer (i.e. the area on the side of the second side of the chassis and/or or because of the presence of a third party vehicle in the rear area), it is possible to refrain from activating the steering means. Alternatively or additionally, the presence signal may be used to alert the operators of third party vehicles to the fact that they are in a dangerous position and to warn them to move away from the tow vehicle and snowplow trailer. can.

Advantageously, the following provisions may be made.
The snow removal trailer includes a disabling means capable of disabling the orientation means;
The disabling means and the detecting means are arranged such that when the wheel is in the second wheel position and the detecting means is generating the presence signal, the disabling means moves the axle from the second wheel position to the first wheel position. configured to prevent actuation of the orienting means which may tend to direct the orientation means.

Thus, if the detection means detect a third party vehicle in a dangerous position (i.e. in the area of the side and/or the rear of the second side of the chassis), activation of the orientation means becomes impossible. . In this way, safety is ensured even if the driver of the towing vehicle is not careful.

In practice, the area of the side of the second side of the chassis advantageously corresponds to the angle that the second side of the chassis must traverse in order for the axle to move from the second wheel position to the first wheel position. The sector may include at least a portion of the sector.

In fact, the region of the rear of the second side of the chassis may advantageously be at a distance less than the predetermined distance from the rear end of the second side of the chassis.

Preferably, the snow removal trailer is provided with warning means capable of generating a warning signal, preferably a visual and/or audible warning signal, perceptible to the individual detected by the detection means when the detection means generates the presence signal. may include.

Thus, the presence signal can be used to alert the driver of a third party vehicle to the fact that they are in a dangerous position, thereby prompting them to move away from the tow vehicle and snowplow trailer. I can do it.

Advantageously, the detection means include at least an ultrasonic sensor. Thus, the detection means has a structure that is simple and easy to install and adjust, like a parking assist device used in an automobile.

As a preference, the following provisions can be made:
the detection means includes a sensor positioned near the rear end of the second side of the chassis;
The sensor is designed to detect objects or individuals around a mean detection direction directed diagonally away from the second side of the chassis and the front end of the chassis.

Such an orientation of the sensor makes it possible to monitor the lateral and/or rear area of the second side of the chassis in a simple manner.

Advantageously, the detection means generate a presence signal if the detected object or individual is at a distance relative to the sensor that is less than a maximum distance that is an increasing function of the axle angle.

By adapting the detection distance of the sensor according to the axle angle in this way, it is possible to generate an ill-timed presence signal (or to disable the control of the orientation means) if the detected object is a guardrail on the side of the detected road. (even deterioration) is avoided.

To avoid this problem of detecting guardrails on the side of the road, the following provisions can be made instead.
The detection means does not generate a presence signal if the axle angle is less than a predetermined minimum angular value, or the presence signal is disabled if the axle angle is less than a predetermined minimum angular value.

The fact that no presence signal is generated or that the presence signal is ineffective at small axle angles is not unduly disadvantageous. A third party vehicle does not have enough space to position itself close to its side areas in any case.

Another aspect of the invention proposes a snow removal assembly. This snow removal assembly is
a towing vehicle,
The above snow removal trailer,
and warning means capable of generating a warning signal, preferably a visual and/or audible warning signal, perceivable by a driver in the cab of the towing vehicle when the detection means generates the presence signal. .

Thus, the driver of the towing vehicle may be forced to orient due to the presence of a third party vehicle in a dangerous position relative to the snowplow trailer (i.e. in the lateral and/or rear area of the second side of the chassis). You will definitely be warned to refrain from activating the means.

As a tow vehicle driver, there are so many things to monitor: the correct road maintenance and course of the tow vehicle on the road, the path of the snowplow trailer relative to the edge of the road, and the snow removal blades that the tow vehicle typically carries. the orientation of the road, the substances that need to be spread on the road (salt, sand, etc.), the obstacles that may be present on the road or at the edge of the road, etc.; therefore, the use of visual and/or audible warning signals is preferred. .

As a preference, the alarm means:
camera means directed at the side area and/or the rear area, located at least partially near the second side of the chassis;
display means disposed in the cab of the towing vehicle and capable of receiving and displaying images from the camera means.

The camera means give the operator of the towing vehicle a clear view of events occurring in the lateral and/or rear area of the second side of the chassis.

Advantageously, the display of the image by the display means can only be triggered if the detection means are generating a presence signal, which makes the driver, who already has too much to monitor, unnecessarily This is to avoid distractions.

Another aspect of the invention proposes the use of a snow removal trailer as described above or a snow removal assembly as described above, in which the detection means are used to detect the Monitor the lateral and/or rear areas of the two sides. Thus, monitoring is carried out (and a presence signal is generated) only if there is a risk that a third party vehicle or third party individual enters the side area or the rear area. This limits the risk of unnecessary alarms.

Another aspect of the invention proposes the use of a snow removal trailer as described above or a snow removal assembly as described above, in which the axle is moved from a second wheel position to a first wheel position by The detection means are used to monitor the sides of the chassis only on those sides of the chassis that include at least part of the angular sector that the plane needs to traverse. In this way, monitoring is carried out only on the critical side. No detection is performed on the opposite (first) side of the chassis to avoid misleading the operator with excessive presence signals.

Further objects, features and advantages of the invention will become apparent from the following description of some specific embodiments and are given with reference to the accompanying figures therein.
1 is a schematic view from above of a snow removal assembly with a snow removal trailer according to the invention, at least one wheel of which is in a first wheel position; FIG. 2 is a schematic top view of a portion of the snow removal trailer of the snow removal assembly of FIG. 1; FIG. 1 is a schematic top view of a snow removal assembly with a snow removal trailer, at least one wheel of which is in a second wheel position; FIG. 4 is a schematic top view of a portion of the snow removal trailer of the snow removal assembly of FIG. 3; FIG. FIG. 3 is a schematic diagram showing the operation of the detection means of the snow removal trailer.

Where the same numerical references are used in several embodiments of the invention, these numerical references refer to the same or similar elements in each embodiment.

1 to 5 show one exemplary embodiment of a snow removal trailer 1 according to the invention, which snow removal trailer 1 is used with the snow removal assembly 2 of FIGS. 1 and 3 for towing the trailer 1. It further includes a towing vehicle 3.

For example, as described in Patent Document 1 and Patent Document 2, the snow removal trailer is of a type that can swing between a transportation position (FIGS. 1 and 2) and a snow removal position (FIGS. 3 and 4). be.

The snowplow trailer 1 is intended to be towed by a towing vehicle 3 equipped with a towing hitch 4 . This snow removal trailer 1 is
Extending longitudinally in the chassis direction II between the front end 5a of the chassis and the rear end 5b of the chassis, and extending laterally between the first side 5c of the chassis and the second side 5d of the chassis opposite to each other. an extending chassis 5;
a snow removal blade 6 supported along the first surface 5c of the chassis;
Four wheels 7a-7d designed to support the chassis 5 with respect to the ground, the axles of the wheels 7a-7d are arranged by orientation means 8 such that the axes of the axles around which the wheels 7a-7d rotate are aligned with the chassis. The first wheel position (FIGS. 1 and 2) perpendicular to the direction II (FIGS. 1 and 2) and the axis of the axle on which the wheels 7a-7d rotate differ by 90 degrees from the chassis direction II ( wheels 7a-7d that can be selectively oriented between at least a second wheel position (FIGS. 3 and 4) forming an axle angle A (FIGS. 3 and 4);
a drawbar 9 with which the front end 5a of the chassis can be connected to the towing hitch 4 of the towing vehicle 3.

The orientation means 8 in particular include a double-acting hydraulic cylinder 19, which can be seen more specifically in FIGS. 2 and 4.

In this case, the snow removal trailer 1 is similar to that described in US Pat. IV-IV and a direction in which the snow removal trailer 1 extends laterally between the first side 5c of the chassis and the second side 5d of the chassis. As can be seen by comparing FIGS. 1 and 2 with FIGS. 3 and 4, the pivoting means 20 are capable of selectively moving the chassis 5 in pivoting relative to the drawbar 9; and the relative angular position of the pull rod 9 can be fixed. In particular, the pivoting means 20 includes a double-acting hydraulic cylinder 12, which can be seen particularly in FIGS. 2 and 4.

The snow removal trailer 1 emits a presence signal when the wheels 7a-7d are in the second wheel position and an object or person is in the side area A1 and/or the rear area A2 of the second side 5d of the chassis. It includes a detection means 10 that can be generated.

More specifically, in FIGS. 3 and 4, a region A1 on the side of the second surface of the chassis is a region where the axle moves from the second wheel position (FIGS. 3 and 4) to the first wheel position (FIGS. 1 and 4). It can be seen that in order to move to FIG. 2), the second side 5d of the chassis comprises at least a part of the angular sector SA (the contour of which is marked with a dashed line) that needs to be traversed.

Furthermore, it can be seen that the region A2 at the rear of the second side 5d of the chassis is at a distance less than the predetermined distance D from the rear end of the second side 5d of the chassis.

If a third party vehicle attempts to enter the angular sector SA, this is at least detected by the detection means 10 when the third party vehicle enters the area A1. Here, the third party's vehicle is detected as soon as it enters the rear region A2 even before it is lined up on the second surface 5d of the chassis. Thus, in the absence of a presence signal, the orientation means 8 can be operated worry-free, without risk to third party vehicles. If a third party vehicle enters either the area A1 or the area A2, its intrusion can be detected and the driver of the towing vehicle can be warned not to activate the orientation means 8.

In one particular embodiment, the snow removal trailer 1 includes disabling means that are able to disable the orientation means 8. Next, the disabling means and detecting means 10 causes the disabling means to move the axle to the second wheel position when the wheels 7a-7d are in the second wheel position and the detecting means 10 is generating the presence signal. Activation of the orientation means 8 which may tend to direct from the wheel position (FIGS. 3 and 4) towards the first wheel position (FIGS. 1 and 2) is prevented. In this way, movements that could cause the snow removal trailer 1 to collide with a third party's vehicle are prevented.

In the embodiment shown in the figures, the detection means 10 at least include an ultrasonic sensor 11 (FIGS. 3 and 4), such as those used in the motor vehicle sector for parking aids (also commonly referred to as "reversing radars"). include.

The sensor 11 is located near the rear end of the second surface 5d of the chassis (slightly forward of the front end 5a of the chassis along the chassis direction II). The sensor 11 is designed to detect objects or individuals around a detection means direction II-II directed obliquely away from the second side 5d of the chassis and the front end 5a of the chassis. Here, the detection means direction II-II forms an angle B of 90° to 180° with the chassis direction II.

The movement of the snow removal trailer 1 (or the driver of the tow vehicle 3 operating the snow removal trailer 1) is not impeded by improper detection of a guardrail adjacent to the road on the side of the second surface 5d of the chassis. It is important to.

To achieve this, a first possibility generates a presence signal if the detected object or individual is at a distance less than a maximum distance DMax, which is an increasing function of the axle angle A, with respect to the sensor 11. The object of the present invention is to include a detection means 10 for detecting the detection result. In other words, as the axle angle A returns to 90° (and thus as the snow removal trailer 1 returns to the continuation of the path of the towing vehicle 3), the range within which objects or individuals can be detected decreases.

A second possibility is to provide that the presence signal is disabled if the axle angle A is smaller than a predetermined minimum angle Amin.

A third possibility, which is preferred here and is adopted in the embodiments of FIGS. 1 to 5, provides that the detection means 10 do not generate a presence signal if the axle angle A is smaller than a predetermined minimum angle value Amin. It is to be.

FIG. 5 schematically shows that the warning means 13 can generate a warning signal perceivable by the individual detected by the detection means 10. In this case, the warning means 13 comprises a visual warning signal generator 13a (flashing or fixed light) and an audible warning signal generator 13b, which respectively detect when the detection means 10 is generating a presence signal. Generate visual and audible signals. The warning means is supported by a snow removal trailer 1. The alarm means 14 can generate an alarm signal that can be perceived by the driver in the cab of the towing vehicle 3 . In practice, the alarm means 14 includes a visual alarm signal generator 14a and an audible alarm signal generator 14b, which generate a visual signal and an audible signal, respectively, when the detection means 10 is generating a presence signal. do.

In this case, in order to generate a visual warning signal, the alarm means 14:
camera means 15 located at least partially near the second side 5d of the chassis and directed towards the lateral area A1 and/or the rear area A2, supported by the towing vehicle 3 or snow removal; camera means 15, which may be supported by the trailer 1;
Display means 16 is arranged in the driver's cab of the towing vehicle 3 and is capable of receiving and displaying images from the camera means 15.

The display of the image by the display means 16 can only be triggered if the detection means 10 are generating a presence signal, which unnecessarily distracts the driver, who already has too much to monitor. This is to prevent it from scattering.

Also included in FIG. 5 are control means 17 and measuring means 18 for controlling and measuring the axle angle A, respectively. The axle angle A can be measured in various ways, for example by measuring the stroke of the hydraulic cylinder 19.

The manner in which the snow removal trailer 1 operates will now be described in connection with FIGS. 1-5.

The snowplow trailer 1 is initially towed behind the towing vehicle 3 (transport position) with an axle angle A of 90°: the axis of the axle on which the wheels 7a-7d rotate is parallel to the direction III-III, and Makes an axle angle A equal to 90° with the chassis direction II.

If there is snow to be removed, the directing means 8 are operated to increase the axle angle A in order to direct the wheels 7a-7d to the second wheel position (FIGS. 3 and 4 - FIGS. 3 and 4 of the snow removal trailer 1). Snow removal position): The axes of the axles around which the wheels 7a-7d rotate are parallel to the direction III-III and form an axle angle A of more than 90° with the chassis direction II. The snow removal blade 6 is simultaneously or subsequently lowered into contact with the roadway.

If a predetermined axle angle Amin, identified by the means 18 for measuring the axle angle A is exceeded (in practice, sufficient space is created for a third party vehicle to be squeezed along the second side 5d of the chassis) As soon as the detection means 10 is activated), the control means 17 actuate the detection means 10.

According to another approach, the detection means 10 monitor the lateral area A1 and/or the rear area A2 of the second side 5d of the chassis only when the wheels 7a-7d are in the second wheel position. . Thus, monitoring is carried out only if there is a risk that a third party vehicle or third party individual enters the side area A1 or the rear area A2 (a presence signal is generated if necessary) . This limits the risk of unnecessary alarms.

As shown in FIGS. 3 and 4, the detection means 10 detects the angular sector SA that the second surface 5d of the chassis needs to traverse in order for the axle to move from the second wheel position to the first wheel position. The side of the chassis is monitored only in the region A1 of the side, which includes at least a portion.

If a third party vehicle inadvertently approaches the snowplow trailer 1 and enters one and/or the other of the areas A1 and A2, the detection means generate a presence signal that is transmitted to the control means 17.

The control means 17 then generates a visual signal (fixed or flashing light) using the visual warning signal generator 13a and generates an audible warning signal in order to attract the attention of the driver of the third party vehicle. The warning means 13 which generates an audible signal using the device 13b is operated.

At the same time, the control means 17 activates the alarm means 14 to warn the driver in the cab of the towing vehicle 3 of the presence of a third party's vehicle.
The audible warning signal generator 13b emits an audible signal;
The camera means 15 transmits the image displayed by the display means 16.

The driver of the towing vehicle 3 should be appropriately alerted to the presence of a third party vehicle and then move the axle from the second wheel position (Figs. 3 and 4) to the first wheel position (Figs. 1 and 2). ) refrains from actuating the orientation means 8 which tend to direct the In this way, a collision with a third party vehicle is avoided.

When the snow removal operation is completed or when an obstacle has to be overcome, the driver of the towing vehicle must move the axle to the second wheel position (Figs. 3 and 3) to return the snow removal trailer 1 to the transport position. 4) to the first wheel position (FIGS. 1 and 2). If no object or individual is present in the areas A1 and A2, the detection means will not emit a presence signal. Furthermore, below a predetermined axle angle Amin identified by the means 18 for measuring the axle angle A, the control means 17 deactivate the detection means 10 so that the snow removal trailer is operated by the driver of the snow removal trailer 1 and The return to the transport position shown in FIGS. 1 and 2 is completed absent the inadvertent detection of guardrails adjacent to the roadway which would/or trouble the operation.

The invention is not limited to the embodiments explicitly described, but includes various modifications and generalizations thereof that fall within the scope of the following claims.

Claims (15)

A snow removal trailer (1) intended to be towed by a towing vehicle (3) equipped with a towing hitch (4), said snow removal trailer (1) comprising:
A first surface (5c) of the chassis and a second surface of the chassis that extend longitudinally in the chassis direction (II) between the front end (5a) of the chassis and the rear end (5b) of the chassis and are opposite to each other. (5d) extending laterally between the chassis (5);
a snow removal blade (6) supported along a first surface (5c) of the chassis;
at least one wheel (7a-7d) designed to support said chassis (5) with respect to the ground, the axle of said wheel (7a-7d) being directed by said A first wheel position where the axis of the axle around which the wheels (7a-7d) rotate is perpendicular to the chassis direction (II), and a first wheel position where the axis of the axle around which the wheel (7a-7d) rotates is perpendicular to the chassis direction (II); at least one wheel (7a-7d) selectively orientable between direction (II) and at least a second wheel position with an axle angle (A) of more than 90°;
a drawbar (9) capable of connecting the front end (5a) of the chassis to the towing hitch (4) of the towing vehicle (3);
The snowplow trailer (1) is configured such that the wheels (7a-7d) are in the second wheel position and an object or person is located in the area (A1) and/or on the side of the second side (5d) of the chassis. comprising detection means (10) capable of generating a presence signal when in the rear region (A2);
Snow removal trailer (1). The snow removal trailer (1) includes a disabling means capable of disabling the orienting means (8);
The disabling means and the detecting means (10) detect the disabling when the wheels (7a-7d) are in the second wheel position and the detecting means (10) are also generating a presence signal. Snow removal trailer according to claim 1, wherein the means are configured to prevent actuation of the directing means (8) tending to direct the axle from the second wheel position to the first wheel position. (1). The lateral area (A1) of the second side (5d) of the chassis is arranged so that the axle moves from the second wheel position to the first wheel position. Snow removal trailer (1) according to claim 1 or 2, comprising at least a part of the angular sector (SA) that the snow removal trailer (1) has to traverse. 1 . The rear region (A2) of the second surface (5d) of the chassis is at a distance shorter than a predetermined distance (D) from the rear end of the second surface (5d) of the chassis. The snow removal trailer (1) according to any one of items 3 to 3. an alert which, when said detection means (10) generates a presence signal, may generate a warning signal perceptible to the individual detected by said detection means (10), preferably a visual and/or audible warning signal; Snow removal trailer (1) according to any one of claims 1 to 4, comprising means (13). Snow removal trailer (1) according to any of the preceding claims, wherein the detection means (10) comprises at least an ultrasonic sensor (11). The detection means (10) comprises a sensor (11) positioned near the rear end of the second side (5d) of the chassis;
The sensor (11) detects objects or individuals around a detection means direction (II-II) oriented obliquely away from the second side (5d) of the chassis and the front end (5a) of the chassis. Snow removal trailer (1) according to any one of claims 1 to 6, designed to. The detection means (10) transmits the presence signal when the detected object or individual is at a distance smaller than a maximum distance that is an increasing function of the axle angle (A) with respect to the sensor (11). Snow removal trailer (1) according to claim 7, which produces. If the axle angle (A) is smaller than a predetermined minimum angle value (Amin), the detection means (10) do not generate a presence signal;
Snow removal trailer (1) according to any of the preceding claims, wherein the presence signal is disabled if the axle angle (A) is less than the predetermined minimum angle value (Amin). A snow removal assembly (2), the snow removal assembly (2) comprising:
a towing vehicle (3);
A snow removal trailer (1) according to any one of claims 1 to 9,
When said detection means (10) generates a presence signal, it generates an alarm signal, preferably a visual and/or audible alarm signal, perceivable by a driver in the cab of said towing vehicle (3). an alarm means (14) capable of
Snow removal assembly (2). The alarm means (14) includes:
camera means (15) directed towards said lateral area (A1) and/or rear area (A2), arranged at least partially near a second side (5d) of said chassis;
Snow removal assembly according to claim 10, comprising display means (16) arranged in the cab of the towing vehicle (3) and capable of receiving and displaying images from the camera means (15). (2). Only when the wheels (7a-7d) are in the second wheel position, the detection means (10) detect the side areas (A1) and/or the rear part of the second side (5d) of the chassis. Use of a snow removal trailer (1) according to any one of claims 1 to 9, or of a snow removal assembly (2) according to claims 10 or 11, for monitoring an area (A2) of. The lateral area (A1) of the second side (5d) of the chassis is arranged so that the axle is moved from the second wheel position to the first wheel position. 13. The use according to claim 12, wherein 5d) comprises at least a part of the angular sector (SA) that needs to be traversed. 12. The rear region (A2) of the second surface (5d) of the chassis is at a distance shorter than a predetermined distance (D) from the rear end of the second surface (5d) of the chassis. or the use described in 13. said side comprising at least part of an angular sector (SA) that a second side (5d) of said chassis has to traverse in order for said axle to move from said second wheel position to said first wheel position; The snow removal trailer (1) according to any one of claims 1 to 9, or according to claims 10 or 11, wherein only in the area (A1) the detection means (10) monitor the sides of the chassis. Use of the described snow removal assembly (2).

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