Base frame for a reach truck

Patent metadata

Field	Value
Publication number	US-11511982-B2
Application number	US-201916251234-A
Country	US
Kind code	B2
Filing date	Jan 18, 2019
Priority date	Jan 24, 2018
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A base frame for a reach truck comprises a wheel arm subassembly comprising two wheel arms each having a front end and an opposing rear end. A load wheel receiver is positioned on each rear end and a counterweight is positioned at the front end of the wheel arms and coupled to the wheel arm subassembly by a plurality of screw connections. The plurality of screw connections comprise a first portion of screw connections and a second portion of screw connections. The first portion of screw connections each extend in a first direction and the second portion of the screw connections each extend in a second direction which is different from the first direction.

First claim

The invention claimed is:

1. A base frame for a reach truck, comprising:
a wheel arm subassembly comprising two wheel arms each having a front end and an opposing rear end, wherein a load wheel receiver is positioned on each rear end; and
a counterweight positioned at the front end of the two wheel arms and coupled to the wheel arm subassembly by a plurality of screw connections, wherein the plurality of screw connections comprise a first portion of screw connections and a second portion of screw connections,
wherein the first portion of screw connections each extend in a first direction and the second portion of the screw connections each extend in a second direction which is different from the first direction,
wherein at least one of the plurality of screw connections comprises a screw head configured to be countersunk, and wherein the wheel arm subassembly defines a through-bore with a diameter which is larger than the screw head and a welded-on disc defining a through-bore that is smaller than the screw head.

2. The base frame according to claim 1 , wherein an upper face of the welded-on disc forms a contact surface for a disc positioned between the wheel arm subassembly and the counterweight, and wherein the disc is configured to increase a coefficient of friction between the wheel arm subassembly and the counterweight.

3. The base frame according to claim 2 , wherein the counterweight defines a recess configured to receive the welded-on disc.

4. The base frame according to claim 3 , wherein a base of the recess forms a contact surface for a disc positioned between the wheel arm subassembly and the counterweight, and wherein the disc is configured to increasing the coefficient of friction between the wheel arm subassembly and the counterweight.

5. The base frame according to claim 1 , wherein the counterweight extends a width of the base frame.

6. The base frame according to claim 1 , wherein at least one of a driver's cab and a drive wheel carrier are configured to fasten to the counterweight.

7. The base frame according to claim 1 , wherein the counterweight is comprised of cast iron and configured to provide torsional stability for the reach truck.

8. A base frame for a reach truck, comprising:
a wheel arm subassembly comprising two wheel arms each having a front end and an opposing rear end, wherein a load wheel receiver is positioned on each rear end; and
a counterweight positioned at the front end of the two wheel arms and coupled to the wheel arm subassembly by a plurality of screw connections, wherein the plurality of screw connections comprise a first portion of screw connections and a second portion of screw connections,
wherein the first portion of screw connections each extend in a first direction and the second portion of the screw connections each extend in a second direction which is different from the first direction,
wherein a center of gravity of the counterweight is below a center of gravity of the wheel arm subassembly.

9. The base frame according to claim 8 , wherein the center of gravity of the counterweight is below an upper edge of each wheel arm.

10. The base frame according to claim 8 , wherein the wheel arm subassembly defines at least one through-bore configured to accept a dowel pin, and wherein the dowel pin is configured to accept a screw.

11. The base frame according to claim 8 , wherein the wheel arm subassembly comprises a transverse connection welded to the two wheel arms.

12. The base frame according to claim 11 , wherein the transverse connection comprises at least one of a horizontally arranged base plate and a vertically arranged transverse member.

13. The base frame according to claim 8 , wherein the counterweight is comprised of cast iron and configured to provide torsional stability for the reach truck.

Assignees

• Jungheinrich Ag

Inventors

• Lemke Frank
• Belchev Boyan

Classifications

• B66F9/07513 Primary

  Details concerning the chassis · CPC title

• B62D21/186

  for building site vehicles or multi-purpose tractors (tracked vehicles B62D55/10; tractors in general B62D49/00; building site vehicles in general E02F; lift-trucks B66F) · CPC title

• B66F9/07559

  Stabilizing means · CPC title

• B66F9/07554

  Counterweights · CPC title

• B66F17/003

  for fork-lift trucks · CPC title