Mast for a load lifting vehicle
Patent Information
- Application Number
- HK62026125666
- Authority / Receiving Office
- HK · HK
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-04-04
- Filing Date
- 2026-07-03
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2044-03-18
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Abstract A lifting vehicle includes: two opposing rails connected by a base; a bracket that moves along the rails; a mast beam that moves along the rails; a first hydraulic cylinder and a second hydraulic cylinder connected to the mast beam; wherein the first hydraulic cylinder is used to move the bracket relative to the beam, and the second hydraulic cylinder is used to move the beam, the first hydraulic cylinder and the bracket relative to the base.
Claims
Claims:1 . A mast for a load lifting vehicle comprising: two opposed rails connected by a base; a carriage configured to move along the rails; a mast cross member configured to move along the rails; a first hydraulic cylinder and second hydraulic cylinders connected to the mast cross member; wherein the first cylinder is configured to move the carriage with respect to the mast cross member and the second cylinders are configured to move the mast cross member, the first cylinder and carriage with respect to the base.
2. The mast according to claim 1 wherein the carriage comprises two opposed sections and a carriage cross member connecting the opposed sections, the two opposed sections shaped to slide within the rails of the mast.
3. The mast according to claim 2 wherein a piston rod end of the first cylinder is connected to the carriage cross member and a head of the first cylinder is mounted to the mast cross member.
4. The mast according to claim 3 wherein the piston rod end of the first cylinder is connected to the carriage cross member using a spherical rod clevis.
5. The mast according to any one of claims 1 to 4 wherein piston rod ends of the second cylinders are connected to the mast cross member and blind ends of the second cylinders are mounted to the base.
6. The mast according to any one of claims 1 to 5 wherein a piston rod of the first cylinder is configured to extend to raise the carriage and retract to lower the carriage.
7. The mast according to claim 6 wherein piston rods of the second cylinders are configured to extend to raise the mast cross member, the first cylinder and the carriage and retract to lower the mast cross member, the first cylinder and the carriage.
8. The mast according to claim 7 wherein the piston rods of the second cylinders are configured to extend only after the piston rod of the first cylinder is fully extended.
9. The mast according to claim 7 wherein the piston rod of the first cylinder is configured to extend only after the piston rods of the second cylinders are fully extended.
10. The mast according to any one of claims 1 or 9 wherein the second cylinders are configured to hold the mast cross member stationary while the first cylinder moves the carriage with respect to the mast cross member.
11. The mast according to claim 2 wherein the carriage cross member connects the two opposed sections at the first end of the carriage and a second end of the carriage, opposite the first end, is open.
12. The mast according to any one of claims 1 to 12 wherein the rails are connected by fixed support members which maintain the rails parallel to each other.
13. A mast for a load lifting vehicle comprising: two opposed rails connected by a base; a carriage configured to move along the rails; a mast cross member configured to move along the rails; two first hydraulic cylinders and a single second hydraulic cylinder connected to the mast cross member; wherein the two first cylinders are configured to move the carriage with respect to the mast cross member and the single second cylinder is configured to move the mast cross member, the first cylinder and the carriage with respect to the base.