Land vehicles incorporating brake systems and methods therefor

Patent metadata

Field	Value
Publication number	US-12134436-B2
Application number	US-202418422552-A
Country	US
Kind code	B2
Filing date	Jan 25, 2024
Priority date	Dec 9, 2021
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

Land vehicles and methods of operating land vehicles are disclosed. A land vehicle includes a frame structure, a plurality of wheels, and a brake system. The frame structure includes a front cage that at least partially defines an operator cabin and a rear compartment positioned rearward of the front cage in a longitudinal direction. The plurality of wheels are supported by the frame structure. Each of plurality of wheels is sized to permit direct integration of an electric motor therein.

First claim

What is claimed is:

1. An electric vehicle comprising:
a frame structure;
a plurality of wheels supported by the frame structure;
at least one electric motor supported by the frame structure; and
a brake system coupled to each one of the plurality of wheels,
wherein:
each brake system includes a disc and a first braking device to contact the disc to resist rotation of one of the plurality of wheels that includes a first housing,
the first housing defines a unitary structure that surrounds an open cavity extending axially all the way through the first housing, and
the open cavity is radially offset from a central rotational axis of the disc.

2. The electric vehicle of claim 1 , wherein the first housing is formed by two halves.

3. The electric vehicle of claim 2 , wherein the open cavity extends axially all the way through each one of the two halves.

4. The electric vehicle of claim 2 , further comprising a sensor coupled to one of the two halves at an outer periphery thereof, wherein the sensor is configured to provide a signal indicative of degradation of one or more brake pads of the first braking device in use of the electric vehicle.

5. The electric vehicle of claim 1 , wherein:
the disc includes an outer annular surface that extends circumferentially to at least partially define an outer diameter of the disc, and
the first braking device is configured to contact an outer face of the disc without enclosing the outer annular surface.

6. The electric vehicle of claim 1 , wherein:
each brake system includes a second braking device to contact the disc to resist rotation of one of the plurality of wheels, and
the second braking device is circumferentially spaced from the first braking device around the disc.

7. The electric vehicle of claim 6 , wherein the second braking device is circumferentially spaced 180 degrees from the first braking device around the disc.

8. The electric vehicle of claim 6 , wherein:
the second braking device includes a second housing, and
the second housing is structurally distinguishable from the first housing.

9. The electric vehicle of claim 6 , wherein:
the disc includes an outer annular surface that extends circumferentially to at least partially define an outer diameter of the disc, and
the second braking device is configured to contact an outer face of the disc without enclosing the outer annular surface.

10. The electric vehicle of claim 6 , wherein:
each brake system includes a third braking device configured to contact one or more teeth of the disc to resist rotation of one of the plurality of wheels, and
the third braking device is circumferentially spaced from the second braking device and the first braking device around the disc.

11. An electric vehicle comprising:
a frame structure;
a plurality of wheels supported by the frame structure;
at least one electric motor supported by the frame structure; and
a brake system coupled to each one of the plurality of wheels,
wherein:
each brake system includes a disc, a first braking device to contact the disc to resist rotation of one of the plurality of wheels, and a second braking device to contact the disc to resist rotation of one of the plurality of wheels;
the disc includes an outer annular surface that extends circumferentially to at least partially define an outer diameter of the disc;
the first braking device is configured to contact an outer face of the disc without enclosing the outer annular surface, and
the second braking device is configured to contact an outer face of the disc without enclosing the outer annular surface.

12. The electric vehicle of claim 11 , wherein:
the first braking device includes a first housing, and
the second braking device includes a second housing structurally distinguishable from the first housing.

13. The electric vehicle of claim 12 , wherein the first housing defines a unitary structure that surrounds an open cavity extending axially all the way through the first housing.

14. The electric vehicle of claim 11 , wherein the second braking device is circumferentially spaced from the first braking device around the disc.

15. The electric vehicle of claim 14 , wherein the second braking device is circumferentially spaced 180 degrees from the first braking device around the disc.

16. The electric vehicle of claim 11 , wherein:
each brake system includes a third braking device configured to contact one or more teeth of the disc to resist rotation of one of the plurality of wheels, and
the third braking device is circumferentially spaced from the second braking device and the first braking device around the disc.

17. An electric vehicle comprising:
a frame structure;
a plurality of wheels supported by the frame structure;
at least one electric motor supported by the frame structure; and
a brake system coupled to each one of the plurality of wheels,
wherein:
each brake system includes a disc, a first braking device to contact the disc to resist rotation of one of the plurality of wheels, and a second braking device to contact the disc to resist rotation of one of the plurality of wheels;
the first braking device includes a first housing and the second braking device includes a second housing,
at least one of the first housing and the second housing is formed to include an open cavity extending axially all the way therethrough, and
the first braking device is configured to contact an outer face of the disc without enclosing an outer annular surface of the disc that extends circumferentially to at least partially define an outer diameter of the disc.

18. The electric vehicle of claim 17 , wherein the first housing and the second housing are structurally distinguishable from one another.

19. The electric vehicle of claim 17 , wherein the at least one of the first housing and the second housing defines a unitary structure surrounding the open cavity.

20. The electric vehicle of claim 17 , wherein:
the second braking device is circumferentially spaced 180 degrees from the first braking device around the disc, and
the first housing and the second housing are structurally distinguishable from one another.

Assignees

• Workhorse Group Inc

Inventors

• Willison Robert
• Wires Donald L
• Cain Gary

Classifications

• F16D2055/0066

  Brakes having more than one actuator on the same side of the disc · CPC title

• F16D2055/0062

  Partly lined, i.e. braking surface extending over only a part of the disc circumference · CPC title

• F16D2055/0016

  Brake calipers · CPC title

• F16D65/12

  Discs; Drums for disc brakes · CPC title

• F16D65/095

  Pivots or supporting members therefor · CPC title