DK168371B1 - System for suspending the wheels and drawbar on a car trailer, the undercarriage being able to be folded up - Google Patents

Description

The invention relates to a suspension system according to the general part of claim 1.

In the known collapsible systems, the following are used.

5 principles: 1: Pat. GB 2010191 A and GB 2175547 A and US 2110944;

The wheels are swung up towards the carriage floor after a cross bolt has been removed.

2: Pat. No. GB 2175547 A; 10 The tow bar is pushed together under the carriage floor after a cross bolt is removed.

3: The size of the trailer floor is reduced; A: Pat. GB2116488 A and DE 3330515 A1 and GB 1601343; 15 After removing the base plate, the trailer frame is folded around a longitudinal axis, following a harmony principle.

B: Pat. GB 2175547 A and GB 1601343 and GB 2010191 A; 20 After removing the base plate, the trailer frame is folded around a transverse axis according to a folding knife principle.

4: Pat. SE SE 362840, GB 1567839, GB 2098550 A, GB 2132570 A and US

25 2461577.

The trailer is separated and packed.

Common to the already known and patented principles is that the designs become very complicated and thus costly compared to trailers with a fixed 30 construction.

Furthermore, the operation of the systems used is very labor intensive.

The invention provides a suspension system of the kind mentioned initially, which enables folding to occur as a result of insertion of the drawbar.

This is achieved, as described in the characterizing part of claim 1, in that the drawbar is connected to the pull / push connecting rods between the drawbar and the wheel suspension in such a way that the wheel and wheel hub are folded up during axial displacement of the drawbar below. the trolley floor and also by an axial displacement of the drawbar in the opposite direction brings the wheels and wheel hubs back into their operating position.

5 DRAWING DETAILS.

Sign, No. Topic 1. Isometry, type A, knocked out, transport position.

2. Isometry, type A, collapsed state.

10 3. Isometry, Type B, Failed state, Transport position.

4. Isometry, type B, collapsed state.

5. Isometry, type C1, knocked out condition, transport position.

6. Isometry, type Cl, collapsed state.

7. Floor plan of type Cl.

15 8A-8C Detail drawings of wheels and suspension, type Cl.

9. Isometry, type C2, off state, transport position.

10. Isometry, type C2, collapsed state.

The suspension can be of three types: 20 A: A telescopic jumper attached to the bottom frame of the trailer and on which the wheels are mounted. The spring may consist of a steel coil or a rubber block.

B: A leaf spring, built in between the suspension and the bottom frame of the trailer.

25 C: A torsion spring, built into the transaxle of the trailer.

The principle of the invention can be used in all types of suspension; hereinafter referred to as type A, type B and type C.

TYPE A

FIG. 1 shows the trailer in the off state, transport position.

The wheel (1) is mounted on the frame (3) via a telescopic shock absorber (2) and is held by the connecting rod (4) longitudinally and the connecting rod (5) in the transverse direction. Also seen is the drawbar (6) with the telescopic bracket (7) at the rear and the U-bracket (8) and the front safety bolt (10).

3 GB 168371 B1 When the drawbar, after removing the safety bolt, is pressed downwards and backwards, the connecting rods, which via movable joints are attached to the towing rod and to the wheel hubs, are pulled backwards.

This affects the wheel hubs inwards. The longitudinal drawbar 5 ensures that the telescopic spring and wheel hub, when the towing rod and the transverse connecting rod are pulled backwards, describe a circular movement inwards and upwards towards the carriage bottom, perpendicular to the longitudinal direction of the trailer.

FIG. 2 shows the trailer in collapsed condition, lying on the side, whereby it can be rolled on one wheel.

typeB

FIG. 3 shows the trailer in the off state, transport position.

The wheel (a) is mounted on bottom frame (b) via a triangular suspension (c) fixed to the frame by means of a ball joint (d) and a leaf guide (e) attached to the triangle suspension and mounted on the frame in a pipe sleeve (f).

The wheel suspension is attached to the transverse bracket (h) via the intermediate link (g). The drawbar (i) is attached at the rear to the transverse bracket, anterior to the bottom frame via a bracket (j).

20 When the drawbar, after removing the safety bolt, is pushed downwards and backwards, the intermediate joints and thus the wheel suspensions are pulled inwards and up against the carriage floor. The angle of the transverse hanger (h) and the triangular intermediate joints is adjusted so that the movement of the suspension (c) is 90 °.

25

FIG. 4 shows the trailer in folded condition, lying on the side, whereby it can be rolled on one wheel.

TYPE Cl 30 FIG. 5 shows the trailer in the off state, transport position.

The wheel (21) is mounted on the shaft (22) via the pivot arm (23) with the bearing (24) attached to the hub shaft (25) and the torque arm (26) held vertically by the connecting rod (27).

The shaft (22) and the drawbar (28), which are attached to each other, are mounted on the frame 35 below the bottom of the trailer via a U-shaped bracket (29) and the hinge bracket (30) which, like DK 168371 B1 4, the bracket (29) is motionless in the transverse direction of the trailer.

The drawbar is held in advanced position by the connecting rod (31) with a "knee joint" which is locked by a spring-influenced pipe piece (32).

5 During folding, the spring-loaded pipe piece is pushed away from the knee joint, the connecting hose (31) is folded together and the drawbar and shaft are swung backwards and upwards under the carriage floor.

The connecting rods from the carriage floor to the torque arms thereby cause the wheel hubs to rotate about a quarter turn around the swing arms, and the wheels are placed, with the inside 10 facing up, below the trailer plate plate.

FIG. 6 shows in isometry the trailer in folded condition, tilted up the side, whereby it can be rolled on one wheel.

FIG. Figure 7 is a floor plan of the trailer where the placement of wheels and suspension etc. in the transport position is fully drawn.

The position at the collapsed state is indicated by dashed lines.

FIG. Figures 8A-8C show a cross-section, rearward facing wheels and suspension.

FIG. Fig. 8A shows the transport position, Fig. 8B shows the collapsing half completed and Figs. 8C shows the collapsed state.

TYPEC2

Figures 9 and 10 show an alternative structure of type Cl described in Figs. 5-8.

25 The swing arms (43) are reversed here as in a traditional trailer.

The connecting rods (27) from the bottom to the torque arms (46) are replaced by a bracket (47) on which the torque arm can slide during collapse.

The U-shaped bracket (29) and the hinge bracket (30) are replaced by a spinner lattice system of rods forming triangles which absorb the transverse forces between the 30 drawbar / shaft and the carriage bottom.

In FIG. 9 and 10, each of which can be used with type C1.

Common to those in Figs. 1-10 systems are shown that the drawbar and wheels are suspended so that the 35 wheels are retracted under the trailer bottom upon retraction of the drawbar.

5 DK 168371 B1 In the folded state, the wheels have such a projection relative to the bottom frame of the trailer that the trailer in the folded state lying on the side can be rolled on one wheel.

In combination with the sides of the trailer being hinged in such a way that they can be laid down on the bottom plate of the drawer, this is achieved that the size of the trailer is significantly reduced and it is possible to stow the collapsed trailer off the road in, for example, an outbuilding.

Claims (7)

A passenger car trailer equipped with collapsible wheels / wheels and an axially slidable and lockable drawbar characterized in that the drawbar (6, i, 28, 48) is connected to the pull / push connecting rods (5, g, 27, 5 50) between wheel suspension (7 , c, 23, 43) in such a way that wheels (1, a, 21, 41) and wheel hubs in an axial displacement of the drawbar are mapped up under the carriage floor and also by an axial displacement of the drawbar in the opposite direction bring wheels and wheel hubs back to their operating position. Passenger trailer trailer according to claim 1, characterized in that the wheel in the raised position projects a distance outside the side surface of the trailer, so that the trailer, lying on the side, can be rolled on one of the wheels. Passenger trailer trailer according to claim 1, characterized in that the tow bar is guided by a lockable hanger unit (8, j, 31, 32, 51, 52) which in the unlocked condition permits a substantially axial movement of the tow bar. Suspension system according to Claim 1, characterized in that the wheels (1) are mounted on telescopic shock absorbers (2) which are hinged above the frame 20 around the bottom of the trailer and fixed below by a longitudinal linkage bar (4) on each side and a transverse connecting rod (5) from each wheel to the towbar (6) of the trailer, which, after removal of a safety bolt (10), can be pushed backwards, whereby the transverse connecting rods (5) pull the wheels in and up below the bottom of the trailer. 25 Suspension system according to claim 1, characterized in that the wheel (a) is mounted on the triangle (c), which is attached at the rear to the bottom frame (b) of the trailer with the ball joint (d) and in the front via the shipowner (e) and the bushing (f). The triangle is stabilized in the transverse direction by the likewise triangular intermediate joint (g) which transfers the transverse forces to the transverse hanger (h) to which the rear end of the drawbar (i) is attached. The tow bar is suspended in the front of the trailer in the hanger (j). Suspension system according to claim 1, characterized in that the wheels are mounted on the shaft (22) via the swing arms (23) with the bearings (24), attached to the hub shaft (25) and the torque arm (26), which is held vertically by the connecting rod (27). The shaft (22) and the drawbar (28), which are attached to each other, are mounted on the frame under the bottom of the trailer via a U-shaped bracket (29) and the hinge bracket (30). The drawbar is held in advanced position by the connecting rod (31) Suspension system according to claim log6, characterized in that the swing arms (43) face backwards. The drawbar is extended rearwardly past the transverse shaft (42) to support the rear end of the load. 10 Suspension system according to claim log6, characterized in that the camber angle of the wheels is determined by a hanger (47), the ends of which are fixed to the bottom of the trailer. The torque arm (46) can slide along the shackle as the wheel suspension is pressed backwards during folding. Because of the shape of the hoop; 15 the rear of the hanger describes a larger radius than the front, the torque arm is pressed outwards and the wheel is placed under the bottom of the trailer. Suspension system according to claim log5, characterized in that the connecting hose (4) is failed. The telescopic shock absorber is instead mounted on the frame via a hinge which is rigid in the longitudinal direction of the trailer.