Working arm linkage mechanism of feller

Abstract

The invention discloses a working arm linkage mechanism of a feller. The working arm linkage mechanism comprises a large arm hydraulic cylinder, a small arm hydraulic cylinder, a driven hydraulic cylinder and a linkage assembly, the cylinder bottom end of the big arm hydraulic cylinder is mounted on a rotary table of the feller, and the piston rod end of the big arm hydraulic cylinder is connected with the big arm; the cylinder bottom end of the small arm hydraulic cylinder is installed on a large arm of the feller, and the piston rod end of the small arm hydraulic cylinder is connected with a small arm of the feller through a linkage assembly. The driven hydraulic cylinder is installed on a large arm of the feller, the piston rod end of the driven hydraulic cylinder is connected with a small arm of the feller through a linkage assembly, and a small cavity of the driven hydraulic cylinder is communicated with a large cavity of the large arm hydraulic cylinder. The linkage assembly comprises a first rocker and a first connecting rod, and the first rocker enables the small arm hydraulic cylinder and the driven hydraulic cylinder to be in transmission connection with a small arm of the feller through the first connecting rod. The linkage structure is easy to operate, high in operation comfort level, high in whole machine working efficiency and small in influence of the technical level of a mechanical hand.

Description

Technical Field

[0001] This invention relates to the field of logging machine boom technology, and particularly to a logging machine boom linkage mechanism. Background Technology

[0002] A logging machine's boom typically consists of a boom, arm, implements, and hydraulic cylinders. During logging operations, the operator needs to manipulate two levers to adjust the boom and arm cylinders, respectively. The coordinated movement of these levers moves the implements. This operation is complex, demanding a high level of operator skill, and is significantly affected by the operator's skill level, resulting in low efficiency and fluctuating accuracy. Furthermore, logging operations are usually continuous and prolonged, making operators prone to fatigue when performing multi-lever coordinated operations, which affects operational safety and stability. Summary of the Invention

[0003] Objective: In order to overcome the shortcomings of the existing technology, the present invention provides a logging machine working arm linkage mechanism, which realizes the overall translation of the logging machine by only controlling the forearm, which is easy to operate and has high work efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, the present invention provides a linkage mechanism for the working arm of a logging machine, characterized in that it includes a boom hydraulic cylinder, a forearm hydraulic cylinder, a driven hydraulic cylinder, and a linkage component; The bottom end of the boom hydraulic cylinder is mounted on the turntable of the logging machine, and the piston rod end of the boom hydraulic cylinder is connected to the boom, which is used to drive the boom of the logging machine to rotate around the first pivot point of the boom and the turntable. The bottom end of the boom hydraulic cylinder is mounted on the boom of the logging machine, and the piston rod end of the boom hydraulic cylinder is connected to the boom of the logging machine through a linkage assembly to drive the boom to rotate around the second pivot point of the boom and the boom. The driven hydraulic cylinder is installed on the boom of the logging machine. The piston rod end of the driven hydraulic cylinder is connected to the forearm of the logging machine through a linkage assembly. The small chamber of the driven hydraulic cylinder is connected to the large chamber of the boom hydraulic cylinder. The linkage assembly includes a first telescopic rod and a first connecting rod. The first telescopic rod connects the boom hydraulic cylinder and the driven hydraulic cylinder to the boom transmission of the logging machine through the first connecting rod.

[0006] The boom linkage mechanism of this logging machine is based on a linkage component, namely a set of linkage mechanisms, which combines the boom hydraulic cylinder, the arm hydraulic cylinder and the driven hydraulic cylinder to realize the linkage between the boom and the arm of the logging machine.

[0007] In some embodiments, the feller-buncher working arm linkage further comprises a control module installed in the feller-buncher cab for controlling the extension and retraction of the boom hydraulic cylinder, driving the feller-buncher boom to rotate around the second hinge point, and driving the feller-buncher main arm to rotate around the first hinge point through the transmission assembly, so as to realize the overall translation of the feller-buncher machine.

[0008] In some embodiments, the first remote lever is S-shaped, and the middle part of the first remote lever is rotationally connected to the end of the feller-buncher boom. One end of the first remote lever is connected to the piston rod end of the driven hydraulic cylinder, and the other end is connected to the first connecting rod. The two ends of the first connecting rod are respectively connected to the piston rod end of the boom hydraulic cylinder and the boom of the feller-buncher.

[0009] In some embodiments, the boom hydraulic cylinder is installed above the feller-buncher main arm, and the driven hydraulic cylinder is installed below the feller-buncher main arm.

[0010] In some embodiments, the linkage assembly further comprises a second rocker lever and a second connecting rod. One end of the second rocker lever is rotationally installed on the main arm, and the other end is connected to the piston rod end of the driven hydraulic cylinder. The two ends of the second connecting rod are respectively connected to the first connecting rod and the piston rod end of the driven hydraulic cylinder.

[0011] When the machine needs to move forward, the operator controls the boom hydraulic cylinder to retract, drives the boom to rotate upward around the second hinge point through the transmission of the first connecting rod and the first remote lever, and at this time the machine moves forward and upward. The retraction of the boom hydraulic cylinder will pull the second connecting rod to move backward, and the second connecting rod will push the driven hydraulic cylinder to retract. At this time, the volume of the small cavity of the driven hydraulic cylinder increases, and because the small cavity of the driven hydraulic cylinder is connected to the large cavity of the boom hydraulic cylinder, the hydraulic oil in the large cavity of the boom hydraulic cylinder will be pressed into the small cavity of the driven hydraulic cylinder, and then the hydraulic rod of the boom hydraulic cylinder will descend, causing the main arm to rotate downward around the first hinge point, and at this time the machine moves forward and downward. Because the rotation of the main arm and the boom is carried out at the same time, i.e. the linkage of the main arm and the boom is realized, the machine cancels the upward and downward movement under the linkage, i.e. the forward translation is realized. Conversely, the same is true.

[0012] In some embodiments, one end of the second connecting rod is rotationally connected to the first connecting rod, and the other end is connected to the connection between the piston rod end of the driven hydraulic cylinder and the second rocker lever.

[0013] In some embodiments, the driven hydraulic cylinder and the boom hydraulic cylinder are installed on the same side of the feller-buncher main arm.

[0014] In some embodiments, the working end of the boom of the feller-buncher is further connected to a telescopic arm.

[0015] In a second aspect, the present application provides a working method of the working arm linkage mechanism of the feller-buncher, comprising: When the implement of the feller-buncher needs to translate forward, the small-arm hydraulic cylinder is controlled to retract, and the small arm is driven to rotate upward through the transmission of the linkage assembly; the linkage assembly drives the driven hydraulic cylinder to retract based on the retraction of the small-arm hydraulic cylinder, the small cavity of the driven hydraulic cylinder has a larger volume, the hydraulic oil in the large cavity of the large-arm hydraulic cylinder is pressed into the small cavity of the driven hydraulic cylinder, the hydraulic rod of the large-arm hydraulic cylinder descends, and the large arm is driven to rotate downward; the rotation of the large arm downward and the rotation of the small arm upward cooperatively realize the forward translation of the implement as a whole. When the implement of the feller-buncher needs to translate backward, the small-arm hydraulic cylinder is controlled to extend, and the small arm is driven to rotate downward through the transmission of the linkage assembly; the linkage assembly drives the driven hydraulic cylinder to extend based on the extension of the small-arm hydraulic cylinder, the small cavity of the driven hydraulic cylinder has a smaller volume, the hydraulic oil in the small cavity of the driven hydraulic cylinder is pressed into the large cavity of the large-arm hydraulic cylinder, the hydraulic rod of the large-arm hydraulic cylinder ascends, and the large arm is driven to rotate upward; the rotation of the large arm upward and the rotation of the small arm downward cooperatively realize the backward translation of the implement as a whole.

[0016] Beneficial effects: The feller-buncher working arm linkage mechanism provided by the present application is simple to operate, reduces the requirement for the operating skills of the machine operator, and is particularly suitable for new machine operators; the labor intensity of operation is reduced, the operation is more comfortable, and the machine operator is less likely to be tired in the case of continuous long-time operation; based on the linkage mechanism, the working efficiency of the whole machine can be significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some of the embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 It is a structural schematic diagram of the feller-buncher working arm linkage mechanism in the embodiment one of the present application.

[0019] Figure 2 It is a structural schematic diagram of the feller-buncher working arm linkage mechanism in the embodiment two of the present application.

[0020] Figure 3 It is a hydraulic principle schematic diagram of the feller-buncher working arm linkage mechanism in the embodiment of the present application.

[0021] In the figure: 1, turntable, 2, large arm, 3, large-arm hydraulic cylinder, 4, driven hydraulic cylinder, 5, second remote rod, 6, second connecting rod, 7, small-arm hydraulic cylinder, 8, first remote rod, 9, first connecting rod, 10, small arm, 11, telescopic arm, 12, implement, 13, first winding point, 14, second winding point. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting on the application or its applications or uses.

[0023] The relative arrangement, numerical expressions, and numerical values of the components and steps set forth in the embodiments are not limiting on the scope of the present application unless otherwise specifically stated. Meanwhile, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship for the convenience of description. The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification under appropriate circumstances. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can also include different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0024] Embodiment One:

[0025] The present embodiment provides a feller boom linkage, as shown in the drawings, comprising: a turntable 1, a main boom 2, a main boom hydraulic cylinder 3, a slave hydraulic cylinder 4, a second remote lever 5, a second connecting rod 6, a small boom hydraulic cylinder 7, a first remote lever 8, a first connecting rod 9, a small boom 10, and a tool 12. Figure 1 The main boom 2 is hinged to the turntable 1 at a first twist point 13, and the small boom 10 is hinged to the main boom 2 at a second twist point 14. The slave hydraulic cylinder 4 and the small boom hydraulic cylinder 7 are both mounted on the upper side of the main boom 2.

[0026] The bottom end of the main boom hydraulic cylinder 3 is mounted on the turntable 1, and the piston rod end is connected to the main boom 2, for driving the main boom 2 to rotate around the first twist point 13.

[0027] The bottom end of the main boom hydraulic cylinder 3 is mounted on the turntable 1, and the piston rod end is connected to the main boom 2, for driving the main boom 2 to rotate around the first twist point 13. The bottom end of the small boom hydraulic cylinder 7 is mounted on the main boom 2, and the piston rod end is connected to the small boom 10 through the first remote lever 8 and the first connecting rod 9, for driving the small boom 10 to rotate around the second twist point 14. The slave hydraulic cylinder 4 is mounted on the main boom 2, and the piston rod end is connected to the small boom 10 through the second remote lever 5, the second connecting rod 6, the first remote lever 8, and the first connecting rod 9.

[0028] One end of the second rocker arm 5 is rotatably mounted on the boom 2, and the other end is connected to the piston rod end of the driven hydraulic cylinder 4; the two ends of the second connecting rod 6 are respectively connected to the first connecting rod 9 and the piston rod end of the driven hydraulic cylinder 4; one end of the second connecting rod 6 is rotatably connected to the first connecting rod 9, and the other end is connected to the connection point between the piston rod end of the driven hydraulic cylinder 4 and the second rocker arm 5.

[0029] like Figure 3 As shown, the small cavity of the driven hydraulic cylinder 4 is connected to the large cavity of the boom hydraulic cylinder 3.

[0030] The logging machine's boom linkage mechanism also includes a control module, installed in the logging machine's cab. This control module controls the extension and retraction of the boom hydraulic cylinder 7, causing the boom 10 to rotate around the second pivot point 14. It also drives the boom 2 to rotate around the first pivot point 13 via the second rocker arm 5, the second connecting rod 6, the first telescopic rod 8, and the first connecting rod 9, thus achieving overall translation of the implement 12. The control module includes a joystick; pushing the joystick forward moves the implement horizontally away from the turntable, while pulling the joystick back moves the implement horizontally closer to the turntable.

[0031] Optionally, the working end of the forearm 10 is also connected to a telescopic arm 11.

[0032] Example 2:

[0033] This embodiment provides a method for operating the logging machine boom linkage mechanism as described in Embodiment 1, including: When the machine tool 12 needs to move forward, the operator pushes the control lever forward, controls the hydraulic cylinder 7 of the forearm to retract, and drives the forearm 10 to rotate upward around the second hinge point 14 through the transmission of the first remote lever 8 and the first connecting rod 9. At this time, the machine tool 12 moves forward and upward.

[0034] As the boom hydraulic cylinder 7 retracts, it pulls the second link 6 backward, which in turn pushes the driven hydraulic cylinder 4 to retract. At this time, the volume of the small cavity of the driven hydraulic cylinder 4 increases. Since the small cavity is connected to the large cavity of the boom hydraulic cylinder 3, the hydraulic oil in the large cavity of the boom hydraulic cylinder 3 is forced into the small cavity of the driven hydraulic cylinder 4. Consequently, the hydraulic rod of the boom hydraulic cylinder 3 descends, causing the boom 2 to rotate downward around the first hinge point 13. At this time, the machine tool 12 moves forward and downward.

[0035] Because the rotation of the upper arm 2 and the lower arm 10 is simultaneous, the linkage between the upper arm 2 and the lower arm 10 is achieved. Under the linkage, the machine 12 cancels out the vertical movement, thus achieving forward translation.

[0036] Similarly, when the machine 12 needs to move backward, the operator only needs to pull the control lever back to control the extension of the arm hydraulic cylinder 7. Through the transmission of the first remote lever 8 and the first connecting rod 9, the arm 10 is driven to rotate downward around the second hinge point 14, and the machine 12 moves backward and downward.

[0037] As the boom hydraulic cylinder 7 extends, it pulls the second connecting rod 6 forward, which in turn pulls the driven hydraulic cylinder 4 to extend. At this time, the piston of the driven hydraulic cylinder 4 compresses the volume of the small chamber, forcing hydraulic oil into the large chamber of the boom hydraulic cylinder 3, which in turn pushes the hydraulic rod of the boom hydraulic cylinder 3 upward, causing the boom 2 to rotate upward around the first hinge point 13. At this time, the machine tool 12 moves backward and upward. Under the linkage of the two movements, backward translation can be achieved.

[0038] Example 3:

[0039] This embodiment provides a linkage mechanism for the working arm of a logging machine, such as... Figure 1 As shown, it includes: turntable 1, boom 2, boom hydraulic cylinder 3, driven hydraulic cylinder 4, forearm hydraulic cylinder 7, first telescopic lever 8, first connecting rod 9, forearm 10 and tool 12.

[0040] The boom 2 and the turntable 1 are hinged at the first hinge point 13, and the forearm 10 and the boom 2 are hinged at the second hinge point 14. The driven hydraulic cylinder 4 is installed on the lower side of the boom 2, and the forearm hydraulic cylinder 7 is installed on the upper side of the boom 2.

[0041] The bottom end of the boom hydraulic cylinder 3 is mounted on the turntable 1, and the piston rod end is connected to the boom 2 to drive the boom 2 to rotate around the first pivot point 13. The bottom end of the forearm hydraulic cylinder 7 is mounted on the boom 2, and the piston rod end is connected to the forearm 10 through the first remote rod 8 and the first connecting rod 9, which is used to drive the forearm 10 to rotate around the second pivot point 14. Driven hydraulic cylinder 4 is mounted on boom 2, and its piston rod end is connected to forearm 10 through first telescopic rod 8 and first connecting rod 9.

[0042] The first remote lever 8 is S-shaped, and its middle part is rotatably connected to the end of the forearm 10. One end of the first remote lever 8 is connected to the piston rod end of the driven hydraulic cylinder 4, and the other end is connected to the first connecting rod 9. The two ends of the first connecting rod 9 are respectively connected to the piston rod end of the forearm hydraulic cylinder 7 and the forearm 10.

[0043] like Figure 3 As shown, the small cavity of the driven hydraulic cylinder 4 is connected to the large cavity of the boom hydraulic cylinder 3.

[0044] The logging machine's boom linkage mechanism also includes a control module, installed in the logging machine's cab. This control module controls the extension and retraction of the boom hydraulic cylinder 7, causing the boom 10 to rotate around the second pivot point 14. It also drives the boom 2 to rotate around the first pivot point 13 via the first telescopic lever 8 and the first connecting rod 9, thus achieving overall translation of the implement 12. The control module includes a joystick; pushing the joystick forward moves the implement horizontally away from the turntable, while pulling the joystick back moves the implement horizontally closer to the turntable.

[0045] Optionally, the working end of the forearm 10 is also connected to a telescopic arm 11.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "up," "down," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to explain the relative positional relationship and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. These terms are used only for the convenience of describing the invention and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0047] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A linkage mechanism for the working arm of a logging machine, characterized in that, Includes boom hydraulic cylinder, forearm hydraulic cylinder, driven hydraulic cylinder and linkage assembly; The bottom end of the boom hydraulic cylinder is mounted on the turntable of the logging machine, and the piston rod end of the boom hydraulic cylinder is connected to the boom, which is used to drive the boom of the logging machine to rotate around the first pivot point of the boom and the turntable. The bottom end of the boom hydraulic cylinder is mounted on the boom of the logging machine, and the piston rod end of the boom hydraulic cylinder is connected to the boom of the logging machine through a linkage assembly to drive the boom to rotate around the second pivot point of the boom and the boom. The driven hydraulic cylinder is installed on the boom of the logging machine. The piston rod end of the driven hydraulic cylinder is connected to the forearm of the logging machine through a linkage assembly. The small chamber of the driven hydraulic cylinder is connected to the large chamber of the boom hydraulic cylinder. The linkage assembly includes a first telescopic rod and a first connecting rod. The first telescopic rod connects the boom hydraulic cylinder and the driven hydraulic cylinder to the boom transmission of the logging machine through the first connecting rod.

2. The logging machine boom linkage mechanism according to claim 1, characterized in that, The logging machine boom linkage mechanism also includes a control module, which is installed in the logging machine cab. The control module is used to control the extension and retraction of the boom hydraulic cylinder, drive the logging machine boom to rotate around the second pivot point, and drive the logging machine boom to rotate around the first pivot point through the transmission component, so as to realize the overall translation of the logging machine implement.

3. The logging machine boom linkage mechanism according to claim 2, characterized in that, The first remote control is S-shaped, and its middle part is rotatably connected to the end of the logger's boom. One end of the first remote lever is connected to the piston rod end of the driven hydraulic cylinder, and the other end is connected to the first connecting rod; the two ends of the first connecting rod are respectively connected to the piston rod end of the boom hydraulic cylinder and the boom of the logging machine.

4. The logging machine boom linkage mechanism according to claim 3, characterized in that, The boom hydraulic cylinder is installed above the boom of the logging machine, and the driven hydraulic cylinder is installed below the boom of the logging machine.

5. The logging machine boom linkage mechanism according to claim 2, characterized in that, The linkage component also includes a second rocker and a second connecting rod; One end of the second rocker arm is rotatably mounted on the boom, and the other end is connected to the piston rod end of the driven hydraulic cylinder; The two ends of the second connecting rod are respectively connected to the first connecting rod and the piston rod end of the driven hydraulic cylinder.

6. The logging machine boom linkage mechanism according to claim 5, characterized in that, One end of the second connecting rod is rotatably connected to the first connecting rod, and the other end is connected to the connection point between the piston rod end of the driven hydraulic cylinder and the second rocker arm.

7. The logging machine boom linkage mechanism according to claim 6, characterized in that, The driven hydraulic cylinder and the boom hydraulic cylinder are installed on the same side of the boom of the logging machine.

8. The logging machine boom linkage mechanism according to claim 3 or 5, characterized in that, The forearm working end of the logging machine is also connected to a telescopic arm.

9. The working method of the logging machine boom linkage mechanism as described in any one of claims 1-8, characterized in that, include: When the logging machine's implement needs to move forward, the control arm hydraulic cylinder retracts, driving the arm to rotate upward through the transmission of the linkage component. Based on the retraction of the arm hydraulic cylinder, the linkage component drives the driven hydraulic cylinder to retract, increasing the volume of the small chamber of the driven hydraulic cylinder. Hydraulic oil in the large chamber of the boom hydraulic cylinder is then forced into the small chamber of the driven hydraulic cylinder, causing the hydraulic rod of the boom hydraulic cylinder to descend and drive the boom to rotate downward. The downward rotation of the boom and the upward rotation of the arm work together to achieve the overall forward translation of the implement. When the logging machine's implement needs to move backward, the control arm hydraulic cylinder extends, driving the arm to rotate downward through the transmission of the linkage component. Based on the extension of the arm hydraulic cylinder, the linkage component drives the driven hydraulic cylinder to extend, reducing the volume of the small chamber of the driven hydraulic cylinder. The hydraulic oil in the small chamber of the driven hydraulic cylinder is forced into the large chamber of the boom hydraulic cylinder, causing the hydraulic rod of the boom hydraulic cylinder to rise and drive the boom to rotate upward. The upward rotation of the boom and the downward rotation of the arm work together to achieve the overall backward translation of the implement.

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