Methods of making monocoques of land vehicles using modular mold systems

Patent metadata

Field	Value
Publication number	US-11945507-B2
Application number	US-202217847895-A
Country	US
Kind code	B2
Filing date	Jun 23, 2022
Priority date	Jan 6, 2020
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

Land vehicles, modular systems for forming monocoques of land vehicles, and methods of forming monocoques of land vehicles using modular systems are disclosed. In certain embodiments, the land vehicles are provided as delivery vehicles and/or utility vehicles. A land vehicle includes a monocoque supporting a plurality of wheels to permit movement of the vehicle relative to an underlying surface in use of the land vehicle.

First claim

What is claimed is:

1. A method of forming a monocoque of a land vehicle using a modular system, the method comprising:
forming a front cage mold unit of the modular system corresponding to a front cage of the monocoque that at least partially defines a front end of the land vehicle, and
forming a rear floor mold unit of the modular system corresponding to a rear floor of the monocoque located rearward of the front cage in a longitudinal direction that at least partially defines a rear end of the land vehicle arranged opposite the front end in the longitudinal direction,
wherein forming the front cage mold unit of the modular system comprises
producing a single mold unit,
interconnecting a base at least partially defining a floor of an operator cabin of the land vehicle and a frame at least partially defining a roof of the operator cabin as a unitary structure such that the frame extends above the base in a vertical direction, and
defining (i) a first section of the base that is overlaid by the frame and (ii) a second section of the base that extends forward of the first section in the longitudinal direction beyond the frame such that the second section is not overlaid by the frame at a forward end of the land vehicle,

wherein forming the rear floor mold unit comprises defining a plurality of cutouts extending inwardly toward one another through a body of the rear floor mold unit in a lateral direction perpendicular to the longitudinal direction such that the rear floor mold unit has a reduced width between the plurality of cutouts in the lateral direction,
wherein the front cage mold unit and the rear floor mold unit are structurally distinguishable from one another,
wherein the base of the front cage mold unit and the body of the rear floor mold unit are aligned in the vertical direction, and
wherein the frame of the front cage mold unit extends above the body of the rear floor mold unit in the vertical direction such that at least part of the frame and the body are not aligned in the vertical direction.

2. The method of claim 1 , further comprising:
positioning a first mold unit of the modular system rearward of the front cage mold unit in the longitudinal direction;
aligning the first mold unit with the front cage mold unit when the first mold unit is positioned rearward of the front cage mold unit; and
coupling the first mold unit to the front cage mold unit when the first mold unit is positioned rearward of the front cage mold unit and aligned with the front cage mold unit.

3. The method of claim 2 , further comprising:
introducing one or more composite materials into a mold cavity at least partially established by the coupling of the first mold unit to the front cage mold unit, and
curing the one or more composite materials in the mold cavity to form the monocoque.

4. The method of claim 3 , wherein introducing the one or more composite materials into the mold cavity comprises introducing the one or more composite materials into the mold cavity without introducing metallic material into the mold cavity.

5. The method of claim 3 , wherein introducing the one or more composite materials into the mold cavity comprises:
placing a first material including balsa wood or plastic in the mold cavity, and
placing a second material including fiberglass and resin in the mold cavity.

6. The method of claim 5 , wherein curing the one or more composite materials in the mold cavity comprises:
forming a core including the first material; and
forming a shell including the second material that at least partially surrounds the core.

7. The method of claim 2 , wherein the first mold unit of the modular system is the rear floor mold unit.

8. The method of claim 2 , wherein the first mold unit of the modular system corresponds to an intermediate section of the monocoque that is positioned rearward of the front cage.

9. The method of claim 8 , further comprising:
positioning the rear floor mold unit rearward of the first mold unit in the longitudinal direction;
aligning the rear floor mold unit with the first mold unit when the rear floor mold unit is positioned rearward of the first mold unit; and
coupling the rear floor mold unit to the first mold unit when the rear floor mold unit is positioned rearward of the first mold unit and aligned with the first mold unit.

10. The method of claim 9 , further comprising establishing a continuous mold cavity by coupling the first mold unit to the front cage mold unit and coupling the rear floor mold unit to the first mold unit.

11. The method of claim 9 , wherein the first mold unit is selected from the group consisting of a first intermediate section mold unit of the modular system having a first length, a second intermediate section mold unit of the modular system having a second length greater than the first length, and a third intermediate section mold unit of the modular system having a third length greater than the second length.

12. The method of claim 1 , wherein:
the rear floor mold unit has a first end and a second end arranged opposite the first end in the longitudinal direction, and
the plurality of cutouts are located midway between the first end and the second end.

Assignees

• Workhorse Group Inc

Inventors

• Willison Robert

Classifications

• B62D23/00 Primary

  Combined superstructure and frame, i.e. monocoque constructions ({having impact absorbing means B62D21/15; } superstructure {or monocoque structure} sub-units {or parts or details thereof} B62D25/00 {; characterised by the material thereof B62D29/00}) · CPC title

• B29C69/02

  of moulding techniques only · CPC title

• B29C70/28

  Shaping operations therefor · CPC title

• B60K1/02

  comprising more than one electric motor · CPC title

• B62D23/005 Primary

  with integrated chassis in the whole shell, e.g. meshwork, tubes, or the like (B62D33/044 takes precedence) · CPC title