EP4085172B1

EP4085172B1 - Hydraulic cylinder increasing the rotation angle of the attachment integrated to the construction machines

Info

Publication number: EP4085172B1
Application number: EP20866941.6A
Authority: EP
Inventors: Yusuf Ziya DEMIR; Ferhan FIÇICI; Ilyas GENÇ; Mustafa Bozkurt; Kerem ALTINDAS
Original assignee: Hidromek Hidrolik Ve Mekanik Makina Imalat Sanayi Ve Ticaret AS
Current assignee: Hidromek-Hidrolik Ve Mekanik Makina Imalat Sanayi Ve Ticaret AS
Priority date: 2019-12-30
Filing date: 2020-10-26
Publication date: 2024-02-21
Anticipated expiration: 2040-10-26
Also published as: EP4085172A1; WO2021137789A1; EP4085172A4

Description

TECHNICAL FIELD

The invention relates to work machines such as excavator, loader etc. which are used in many fields such as construction works.
The invention relates to a hydraulic cylinder mechanism adjusting the rotation angle integrated to the attachment mechanism of the construction machines such as excavator, loader etc. that are used in many fields such as building, construction works.

STATE OF THE ART

The construction machines are used in the following processes; all kinds of excavation works for the preparation of substructures such as road, port, dam, airport, channel, platform etc., loading which is required to be made roughly, slope trimming, channel opening works, all kinds of debris removal works, cleaning of ground covers, opening roads in landslips and landslides that happen in mountainous and rocky lands and loading and transporting the excavated material.
The construction machines generally consists of pallet (or rubber wheel), engine, boom, boom cylinder, arm, attachment, attachment cylinder, operator cabin.
In the state of the art, there is a bucket cylinder and mechanism arms on the excavator arm so as to enable the attachment mounted on the arm end to perform its work (this is performed by giving the attachment rotation angle and rupture force). These mechanism arms are generally produced by mounting the steel structures having two or three connection points by welding. Thus, the arms of this mechanism have a fixed length. Particularly, as the arm length is shorter so the mechanism mounted on the attachment can open the attachment at greater angles, at the same time it can close the same at a smaller angle. In brief, it is not possible to obtain a greater opening angle and a greater closing angle in the current structure by means of this mechanism arm. In other words, while the attachment is opened more, it is also closed less or while it is closed more, it is opened less.
There are some applications in the relevant patent literature in terms of the hydraulic cylinder that adjusts the rotation angle integrated to the attachment of construction machines.
The application numbered KR101506335 present in the patent literature, is related to an attachment that enables to use the rotary work pieces connected to the excavators such as pruner, crusher and bucket at the required angle, it consists of an upper plate coupled to the 1st gear, rotary lower table coupled to the 2nd gear, clamping unit for the work piece that can be clamped to the lower surface of the rotary lower plate, rotary block having external gear coupled to the 1st and 2nd gear and lifting element that controls the rotation of the 2nd gear.
Another attachment arrangement is shown in WO 2009/129812 A1 .
As a result, in order to solve the abovementioned problems and the insufficiency of the current solutions, it is necessary to make a development in the relevant technical field.

AIM OF THE INVENTION

The invention aims to solve the abovementioned problems, to eliminate all disadvantages and to bring some additional advantages.
The main aim of the invention is to provide maximum opening and maximum closing of the attachment that are connected to the construction machines in the clockwise and counter clockwise directions. A hydraulic cylinder that adjusts the final position of attachment between the attachment and the transmission mechanism so as to realize this aim, this hydraulic cylinder is connected to the hydraulic circuit of the attachment cylinder. This connection is provided by means of the connection of the splitter of the hydraulic ports on the attachment cylinder.
The structural and characteristic features of the present invention will be understood clearly by the following drawings and the detailed description made with reference to these drawings. Therefore the evaluation shall be made by taking these figures and the detailed description into consideration.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1. It shows the hydraulic cylinder that adjusts the attachment connected to the arm mechanism of the construction machine and attachment cylinder.

REFERENCE NUMBERS

1. Arm mechanism
2. Attachment
3. Transmission mechanism
4. Transmission element
10. Drive mechanism
- 11. Drive mechanism inlet hydraulic port
- 12. Drive mechanism outlet hydraulic port
- 13. Drive piston
- 14. Connection element
20. Positioning mechanism
- 21. Positioning mechanism inlet hydraulic port
- 22. Positioning mechanism outlet hydraulic port
- 23. Positioning piston

DETAILED DESCRIPTION OF THE INVENTION

The arm mechanism (1) integrated to the construction machines used in the preparation of the infrastructures such as highway, port, airport, channel, platform etc. mainly consists of attachment (2), transmission mechanism (3), and drive mechanism (10) and positioning mechanism (20).
The arm mechanism (1) is the main body performing the excavation etc. works of the machine that carries the transmission mechanism (3), attachment (2), positioning mechanism (20) and drive mechanism (10).
The transmission mechanism (3) is a mechanism which is located between the drive mechanism (10) and the attachment (2), transmits the motion and force received from the drive mechanism (10) to the attachment (2). The transmission mechanism (3) consists of 4 arms, operates according to the 4-bar mechanism. The transmission mechanism (3) rotates the attachment (2) clockwise or counter clockwise.
The attachment (2) is a structure that is mounted on the end of the arm mechanism (1) with the power it receives from the drive mechanism (10), performs partial rotation movement with the transmission mechanism (3), with which digging, drilling, crushing, etc. works are performed. The attachment (2) can be used as an apparatus such as bucket, crusher, etc. according to the condition of the work.
The transmission element (4) is a pressure-resistant hydraulic hose that transmits the hydraulic fluid between the drive mechanism (10) and the positioning mechanism (20).
The drive mechanism (10) is a piston-cylinder mechanism which is positioned on the arm mechanism (1), operates with high pressure hydraulic oil; it drives the attachment (2) with the drive piston (13). There are 2 hydraulic ports on the drive mechanism (10) as drive mechanism inlet hydraulic port (11) and drive mechanism outlet hydraulic port (12). Linear movement is made to the drive piston (13) with the pressure formed on the surface of the drive piston (13) when the hydraulic oil enters into the cylinder through the drive mechanism inlet hydraulic port (11) or drive mechanism outlet hydraulic port (12). A connection element (14) is connected to the drive mechanism inlet hydraulic port (11) and drive mechanism outlet hydraulic port (12) on the drive mechanism (10), the common hydraulic connection is provided between the drive mechanism (10) cylinder and positioning mechanism (20) cylinder. A separator is used as the connection element (14).
The positioning mechanism (20) is a piston-cylinder mechanism which is placed between the attachment (2) and the transmission mechanism (3), operates with high pressure hydraulic oil; it provides opening and closing of the attachment (2) with the positioning piston (23) according to the movement of the drive piston (13). There are 2 hydraulic ports on the positioning mechanism (20) as positioning mechanism inlet hydraulic port (21) and positioning mechanism outlet hydraulic port (22). Linear movement is made to the positioning piston (23) with the pressure formed on the surface of the positioning piston (23) when the hydraulic oil enters into the cylinder through the positioning mechanism inlet hydraulic port (21) or positioning mechanism outlet hydraulic port (22). The positioning mechanism (20) increases the rotation angle of the attachment (2) by more opening or more closing the attachment (2) in the clockwise or counter clockwise direction with the extension or shortening of the positioning piston (23) between the attachment (2) and the transmission mechanism (3) when the drive piston (13) of the drive mechanism (10) reaches to the end of the stroke.
The operating principle of the arm mechanism (1) is as follows:
When the attachment (2) is in full open position and the drive piston (13) is at the top dead point in the +x direction, it enters the pressurized hydraulic oil through the drive mechanism inlet hydraulic port (11) and pushes the drive piston (13) in the -x direction. While the hydraulic oil exits the drive mechanism outlet hydraulic port (12) with this driving force, when the drive piston (13) reaches the lower dead point in the -x direction, the positioning piston (23) moves in the -x direction with the passage of the oil to the positioning mechanism inlet hydraulic port (21) from the drive mechanism outlet hydraulic port (12) with the connection element (14), the distance between the attachment (2) and the transmission mechanism (3) increases and thus it enables the attachment (2) to be closed more.
When the attachment (2) is in full closed position and the drive piston (13) is at the lower dead point in the -x direction, the pressurized hydraulic oil enters through the drive mechanism outlet hydraulic port (11) and pushes the piston in the +x direction. While the hydraulic oil exits the drive mechanism inlet hydraulic port (12) with this driving force, when the drive piston (13) reaches the top dead point in the +x direction, the positioning piston (23) moves in the +x direction with the passage of the oil to the positioning mechanism outlet hydraulic port (21) from the drive mechanism inlet hydraulic port (12) with the connection element (14), the distance between the attachment (2) and the transmission mechanism (3) decreases and thus it enables the attachment (2) to be opened more.

Claims

An arm mechanism (1) consisting of an attachment (2) that performs partial rotation movement that is integrated to the construction machines used in the preparation of construction and urban infrastructures, with which digging, drilling, crushing etc. works are performed, a drive mechanism (10) that drives said attachment (2) with the drive piston (13), on which there are 2 hydraulic ports as the drive mechanism inlet hydraulic port (11) and drive mechanism outlet hydraulic port (12), transmission mechanism (3) that is located between said drive element (10) and said attachment (2), transmits the movement and force received from said drive mechanism (10) to said attachment (2), characterized by comprising ;
• a positioning mechanism (20) having positioning piston (23) that moves in the + x or -x direction according to the movement of said drive piston (13) that is located between said attachment (2) and said transmission mechanism (3), on which there are 2 hydraulic ports as positioning mechanism inlet hydraulic port (21) and positioning mechanism outlet hydraulic port (22), and changes the distance between said attachment (2) and said transmission mechanism (3) increasing the rotation angle of the said attachment (2) during opening or closing with this movement,

• a connection element (14) which is connected to the drive mechanism inlet hydraulic port (11) and drive mechanism outlet hydraulic port (12) on the drive mechanism (10), provides the hydraulic oil in the drive mechanism (10) to be used together with said positioning mechanism (20),

• a transmission element (4) that transmits the hydraulic fluid between said drive mechanism (10) and said positioning mechanism (20).
The arm mechanism (1) according to claim 1 characterized in that; said transmission element (14) is splitter.
The arm mechanism (1) according to claim 1 characterized in that; said transmission element (4) is a hydraulic hose.