Wood grabber with hydraulic clamping function and grabbing method thereof

Abstract

The application discloses a wood grabber with hydraulic clamping function and a wood grabbing method thereof, and the wood grabber comprises a connecting assembly installed on the top surface of a main box body, which is used for being connected with a bucket rod and driving the main box body to rotate; outer claws one and two are hingedly arranged on the two sides of the main box body; outer claw telescopic components are arranged in the main box body, and the two axial ends of the outer claw telescopic components are hingedly connected with the corresponding outer claws; the wood grabbing and stacking are realized through the opening and closing operations of the outer claws one and two; inner claws one and two are arranged between the outer claws one and two, the inner claw one is hingedly connected with the outer claw one, and the inner claw two is hingedly connected with the outer claw two; at least one inner claw telescopic component is hingedly arranged between the inner claw one and the outer claw one and between the inner claw two and the outer claw two; the opening and closing operations of the inner claws one and two provide the wood pressing force and adjust the wood grabbing capacity of the wood grabber.

Description

Technical Field

[0001] This invention relates to a log gripper with hydraulic clamping function, belonging to the field of engineering machinery technology. Background Technology

[0002] As an auxiliary working device for excavators, the log grapple leverages the excavator's large lifting force, high loading height, and agile operation. Driven by a hydraulic system, it opens, closes, and rotates to grasp, transport, and stack logs. Using the log grapple eliminates the need for manual labor, elevators, or cranes to move and load timber, offering greater flexibility and improving the convenience and efficiency of log handling and transportation.

[0003] Due to the significant range and uneven distribution of different log materials in terms of size and weight, current single-size log grapples cannot fully handle the loading, unloading, and transfer of logs of various sizes. Existing log grapples can be divided into wide-narrow claw grapples and symmetrical claw grapples. The asymmetrical claw structure of wide-narrow claw grapples results in uneven gripping force between the wide and narrow claws, which may damage the logs during gripping. Furthermore, the need for a large clamping and swinging angle reduces work efficiency, making them more suitable for gripping irregularly shaped logs. Symmetrical claw grapples offer better closing accuracy, and the symmetrical claws can evenly distribute gripping force, reducing damage to the logs. They are more suitable for gripping regularly shaped logs and are widely used in timber processing, construction engineering, and port terminals.

[0004] Symmetrical claw log grippers have a large gripping capacity and high efficiency in a single operation, but there is usually some longitudinal space between the log and the gripper, resulting in insufficient clamping force and relatively poor stability during transport. If logs are manually secured with ropes, the efficiency of continuous operation decreases.

[0005] Publication number CN 114655841 A provides a gripper with a plate chain device, which uses the weight of the plate chain itself to clamp the material and prevent it from falling off. However, relying solely on the gravity of the chain cannot provide a sufficiently strong clamping force on the material, and is especially unsuitable for scenarios with long dimensions or heavy loads; at the same time, the clamping force may further decrease due to chain wear or elongation. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a log gripper with hydraulic clamping function. It employs a hydraulically driven clamping inner jaw, which provides a large clamping force and a stable and reliable clamping effect. The gripping capacity can be adjusted by the inner jaw according to the material density to avoid overload gripping and ensure operational safety.

[0007] This invention is implemented according to the following technical solution:

[0008] In a first aspect, the present invention provides a log gripper with a hydraulic clamping function, comprising:

[0009] main box;

[0010] The connecting component is installed on the top surface of the main box, serving two purposes: firstly, to connect with the boom, and secondly, to drive the main box to rotate.

[0011] Outer claw one and outer claw two are hinged to opposite sides of the main housing.

[0012] The telescopic outer claw component is arranged in the main box, and the two axial ends of the telescopic outer claw component are hinged to the corresponding outer claws. The wood can be gripped and stacked by opening and closing the outer claw one and the outer claw two.

[0013] Inner claw one and inner claw two are arranged between outer claw one and outer claw two, and inner claw one is hinged to outer claw one, and inner claw two is hinged to outer claw two.

[0014] The inner claw telescopic component is hinged between inner claw one and outer claw one, and between inner claw two and outer claw two. Through the opening and closing operation of inner claw one and inner claw two, it provides a clamping force on the wood on the one hand, and can adjust the gripping capacity of the wood gripper on the other hand.

[0015] In some embodiments, when the inner claw 1 and inner claw 2 are fully opened by the inner claw telescopic component, the inner claw 1 and inner claw 2 can retract into their corresponding outer claws, and the inner claws play an auxiliary role in clamping the wood; when the inner claw 1 and inner claw 2 are fully closed by the inner claw telescopic component, the claw tip of inner claw 1 contacts the claw tip of outer claw 2, and the claw tip of inner claw 2 contacts the claw tip of outer claw 1. The distance between the claw tips of inner claw 1 and inner claw 2 is the minimum gripping capacity of the wood gripper.

[0016] In some embodiments, both inner claw one and inner claw two have a hinged component for connecting with the corresponding outer claw and an upwardly protruding arc-shaped clamping component; the arc-shaped clamping component is connected to the middle region of the outer claw through the hinged component, and is driven by the inner claw telescopic component to make the two arc-shaped clamping components swing up and down between the two outer claws.

[0017] In some embodiments, the claw tip region of the second inner claw has an opening, and the width of the claw tip region of the first inner claw is smaller than the width of the opening, so that the claw tip region of the first inner claw can be inserted into the opening of the second inner claw to achieve a clamping function of closing and crossing the two.

[0018] In some embodiments, the arc-shaped clamping components of the inner claw one and the inner claw two are each composed of two inner claw arms and an inner claw guard plate located between the two inner claw arms; the width of the inner claw guard plate of the inner claw one is smaller than the width of the inner claw guard plate of the inner claw two; the length of the inner claw guard plate of the inner claw one is the same as the length of the inner claw arm, and the length of the inner claw guard plate of the inner claw two is smaller than the length of the inner claw arm, thereby forming the opening.

[0019] In some embodiments, both inner claw one and inner claw two are provided with rollers at their tips, and both inner claw one and inner claw two make rolling contact with the wood through the rollers.

[0020] In some embodiments, both inner jaw 1 and inner jaw 2 are provided with a hinge seat 1 near the hinge component, and an outer jaw 2 is provided on the outer jaw above the hinge seat 1. The inner jaw telescopic component is connected between the hinge seat 1 and the hinge seat 2, and the large swing amplitude movement of the inner jaw is achieved by the small stroke extension and retraction of the inner jaw telescopic component.

[0021] In some embodiments, the arc-shaped clamping components of inner claw one and inner claw two are each provided with an opening near the hinge component, the opening being used to meet the range of motion requirements of the inner claw telescopic component during rotation.

[0022] In some embodiments, both outer claw one and outer claw two have a hinge component connected to the outer claw telescopic component and an upwardly protruding arc-shaped clamping component; the arc-shaped clamping component is composed of two outer claw arms and an outer claw guard plate located between the two outer claw arms; each of the two outer claw arms has a coaxially arranged hinge hole in its middle region, and the rotating shaft of the inner claw is inserted into the two hinge holes to achieve hinge; a heating hinge seat for connecting the inner claw telescopic component is provided between the two outer claw arms and above the hinge holes; both outer claw one and outer claw two have rollers at their claw tips, and outer claw one and outer claw two make rolling contact with the wood through the rollers.

[0023] In some embodiments, a synchronous link is movably connected between the hinged components of the first and second outer jaws, thereby enabling the two outer jaws to rotate synchronously.

[0024] In some embodiments, the connection component includes:

[0025] The swing frame has a horizontally arranged hinge shaft one and a longitudinally arranged hinge shaft two. The upper hinge shaft one is connected to the stick, enabling the log grabber to swing in the lateral direction.

[0026] The upper housing is connected to the second hinge shaft, enabling the log gripper to swing in the longitudinal direction;

[0027] A slewing device is installed between the upper box and the main box to enable the log gripper to rotate 360 ​​degrees.

[0028] Secondly, the present invention provides a gripping method based on the above-mentioned log gripper with hydraulic clamping function:

[0029] When grabbing timber, first fix the vehicle in a suitable position, then operate the external claw extension component to open and close the external claw one and external claw two to grab and stack the timber.

[0030] The inner claw telescopic component is operated to open and close the inner claw one and the inner claw two, providing clamping force on the wood to achieve clamping and fixing of the wood. The gripping capacity of the wood gripper can be adjusted by adjusting the closing angle of the inner claw one and the inner claw two, so that the same wood gripper can meet the needs of different operation scenarios.

[0031] The rotating device in the connecting assembly rotates the main box, thereby adjusting the angle and position of the material stacking.

[0032] In some embodiments, the inner claw extension component is operated to retract inner claw one and inner claw two into the corresponding outer claws, and inner claw one and inner claw two are in a fully open state, at which time the wood gripper can perform full-load work.

[0033] The inner claw extension mechanism is operated to close inner claw one and inner claw two, and the intersection of inner claw one and inner claw two is approximately located in the middle of the grasping space formed by the two closed outer claws. At this time, the wood gripper can perform half-load work.

[0034] The inner claw extension mechanism is operated to bring the tip of inner claw one into contact with the tip of outer claw two, and the tip of inner claw two into contact with the tip of outer claw one. Inner claw one and inner claw two are in a fully closed state, at which point the wood gripper can grip a single piece of wood.

[0035] Beneficial effects of this invention:

[0036] This invention provides a log gripper with hydraulic clamping function. Through hydraulic drive, it generates sufficient and stable clamping force to grasp, transport, and stack timber. This log gripper replaces manual labor, provides stable hydraulic clamping force to hold timber, improves the stability and safety of the timber grasping and transport process, and increases the efficiency of continuous operation. Attached Figure Description

[0037] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0038] In the attached diagram:

[0039] Figure 1 This is a schematic diagram of the overall structure of the log grabber of the present invention;

[0040] Figure 2 This is a schematic diagram of the external claw structure of the present invention;

[0041] Figure 3 This is a schematic diagram of the inner claw structure of the present invention;

[0042] Figure 4 This is a schematic diagram of the inner claw structure of the present invention;

[0043] Figure 5 This is a schematic diagram illustrating the theoretical working range of the log gripper of the present invention;

[0044] Figure 6 This is a schematic diagram of the log gripper of the present invention in the fully retracted state (a is the front view, b is the isometric view).

[0045] Figure 7 This is a schematic diagram of the log grabber of the present invention operating under full load (a is the front view, b is the isometric view).

[0046] Figure 8 This is a schematic diagram of the log grabber of the present invention in half-load operation (a is the front view, b is the isometric view);

[0047] Figure 9 This is a schematic diagram of the log gripper of the present invention gripping a single log (a is the front view, b is the isometric view).

[0048] Attached diagram labels: 1. Upper housing; 2. Slewing bearing; 3. Main housing; 4. Synchronous connecting rod; 5. Outer jaw 1; 6. Inner jaw 1; 7. Inner jaw cylinder; 8. Swing frame; 9. Rotary motor; 10. Main cylinder; 11. Outer jaw 2; 12. Inner jaw 2; 51. Outer jaw mounting assembly; 52. Inner jaw cylinder body mounting seat; 53. Outer jaw guard plate; 54. Roller; 55. Mounting reamer hole; 56. Inner jaw mounting assembly; 61. Inner jaw arm; 62. Inner jaw cylinder piston rod mounting seat; 63. Inner jaw guard plate; 64. Roller; 65. Opening; 66. Inner jaw mounting assembly; 121. Inner jaw arm; 122. Opening; 123. Inner jaw guard plate; 124. Roller; 125. Opening; 126.

[0049] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0051] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 limitations on this invention.

[0052] 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] like Figure 1 As shown, a log gripper with hydraulic clamping function includes a main housing 3, a connecting assembly, outer claw 5, outer claw 2 11, an outer claw telescopic component (i.e., a main hydraulic cylinder 10), inner claw 6, inner claw 2 12, and an inner claw telescopic component (i.e., an inner claw hydraulic cylinder 7). The connecting assembly is installed on the top surface of the main housing 3, serving to connect with the boom and to drive the main housing 3 to rotate. Outer claw 5 and outer claw 2 11 are hinged opposite each other on both sides of the main housing 3. The outer claw telescopic component (i.e., the main hydraulic cylinder 10) is arranged in the main housing 3, and the two axial ends of the outer claw telescopic component are connected to the corresponding... The outer claws are hinged, and the opening and closing operations of outer claw 15 and outer claw 21 enable the gripping and stacking of timber. Inner claw 16 and inner claw 212 are arranged between outer claw 15 and outer claw 21, with inner claw 16 hinged to outer claw 15 and inner claw 212 hinged to outer claw 21. At least one inner claw telescopic component (i.e., inner claw cylinder 7) is hinged between inner claw 16 and outer claw 15 and between inner claw 212 and outer claw 21. The opening and closing operations of inner claw 16 and inner claw 212 provide clamping force on the timber and adjust the gripping capacity of the timber gripper.

[0054] Further plans will continue to be considered. Figure 1 As shown, the connecting assembly includes a swing frame 8, an upper housing 1, and a slewing device. The slewing device includes a slewing bearing 2 and a slewing motor 9. The swing frame 8 has a horizontally arranged hinge shaft 1 and a longitudinally arranged hinge shaft 2. The upper hinge shaft 1 is connected to the boom, enabling the log grab to swing in the lateral direction. The upper housing 1 is connected to the hinge shaft 2, enabling the log grab to swing in the longitudinal direction. The slewing bearing 2 and the slewing motor 9 are installed between the upper housing 1 and the main housing 3, enabling the log grab to rotate 360 ​​degrees.

[0055] Further plans will continue to be considered. Figure 1 As shown, a synchronous link 4 is movably connected between the hinged parts of outer claw 15 and outer claw 21, so that the two outer claws can rotate synchronously.

[0056] like Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, when the inner claw 16 and inner claw 212 are fully opened by the inner claw telescopic component (i.e., inner claw cylinder 7), the inner claw 16 and inner claw 212 can retract into the corresponding outer claws, and the inner claws play an auxiliary role in clamping the wood. When the inner claw 16 and inner claw 212 are fully closed by the inner claw telescopic component (i.e., inner claw cylinder 7), the claw tip of inner claw 16 contacts the claw tip of outer claw 21, and the claw tip of inner claw 212 contacts the claw tip of outer claw 15. The distance between the claw tips of inner claw 16 and inner claw 212 is the minimum gripping capacity of the wood gripper.

[0057] The following provides a further explanation of the specific structures of the aforementioned inner claw one and inner claw two.

[0058] Both inner jaw one and inner jaw two have a hinged component for connecting with the corresponding outer jaw and an upwardly protruding arc-shaped clamping component. The arc-shaped clamping component is connected to the middle region of the outer jaw via the hinged component. Driven by the inner jaw telescopic component, the two arc-shaped clamping components swing up and down crosswise between the two outer jaws. The claw tip region of inner jaw two has an opening, and the width of the claw tip region of inner jaw one is smaller than the width of the opening, allowing the claw tip region of inner jaw one to be inserted into the opening of inner jaw two, achieving a closed, cross-clamping function.

[0059] Both inner claw one and inner claw two have arc-shaped clamping components consisting of two inner claw arms and an inner claw guard plate located between the two inner claw arms; the width of the inner claw guard plate of inner claw one is smaller than the width of the inner claw guard plate of inner claw two; the length of the inner claw guard plate of inner claw one is the same as the length of the inner claw arm, while the length of the inner claw guard plate of inner claw two is smaller than the length of the inner claw arm, thus forming an opening.

[0060] In a further embodiment, rollers are provided at the tips of both inner claw one and inner claw two, and both inner claw one and inner claw two make rolling contact with the wood through the rollers.

[0061] In a further embodiment, both inner jaw 1 and inner jaw 2 are provided with a hinge seat 1 near the hinge component, and an outer jaw 2 is provided on the outer jaw above the hinge seat 1. The inner jaw telescopic component is connected between the hinge seat 1 and the hinge seat 2, and the large swing amplitude of the inner jaw is achieved by the small stroke extension and retraction of the inner jaw telescopic component.

[0062] In a further embodiment, both inner claw one and inner claw two have an opening near the hinge component, which is used to meet the range of motion requirements of the inner claw telescopic component during rotation.

[0063] The following describes a preferred embodiment of inner claw one and inner claw two with reference to the accompanying drawings.

[0064] like Figure 3 As shown, the inner gripper 6 consists of an inner gripper mounting assembly 61, inner gripper arms 62, an inner gripper cylinder piston rod mounting seat 63, an inner gripper guard plate 64, and rollers 65. The inner gripper mounting assembly 61 is mechanically fixedly connected to the two inner gripper arms 62. The inner gripper cylinder piston rod mounting seat 63 is mechanically fixedly connected to the inner gripper mounting assembly 61. The rollers 65 are assembled and installed to the inner gripper arms 62 via pins. An inner gripper guard plate 64 is provided between the two inner gripper arms 62. The inner gripper guard plate 64 has an opening 66 around the inner gripper cylinder piston rod mounting seat 63 to meet the range of motion requirements of the inner gripper cylinder 7 during operation.

[0065] like Figure 4 As shown, the inner claw 2 12 is composed of an inner claw mounting assembly 121, inner claw arms 122, an inner claw cylinder piston rod mounting seat 63, an inner claw guard plate 124, and rollers 125. The inner claw mounting assembly 121 is mechanically fixedly connected to the two inner claw arms 122. The inner claw cylinder piston rod mounting seat 63 is mechanically fixedly connected to the inner claw mounting assembly 121. The rollers 125 are assembled and installed with the inner claw arms 122 via pins. An inner claw guard plate 124 is provided between the two inner claw arms 122. The inner claw guard plate 124 has an opening 123 around the inner claw cylinder piston rod mounting seat 63 to meet the range of motion requirements of the inner claw cylinder 7 during operation. The claw tips of the inner claw 2 12 have openings 126 to meet the clamping requirements of the inner claw 1 (inner) 6 and the inner claw 2 (outer) 12 when they are closed and crossed.

[0066] like Figure 5 As shown, key dimension A represents the maximum opening size of the outer claws, and B represents the minimum diameter of the log that can be gripped and clamped. When the two inner claw cylinders 7 are fully retracted, inner claw 1 6 and inner claw 2 12 can retract into the outer claw 1 5 and inner claw 2 11 respectively. Figure 6 As shown in the diagram, the log gripper has its maximum gripping capacity at this point. When both inner gripping cylinders 7 are fully extended, inner jaw 1 6 and inner jaw 2 12 are fully extended, at which point the log gripper has its minimum gripping capacity.

[0067] The specific structures of the aforementioned external claw one and external claw two will be further explained below.

[0068] Both outer claw one and outer claw two have a hinge component connected to the outer claw telescopic component and an upwardly protruding arc-shaped clamping component; the arc-shaped clamping component consists of two outer claw arms and an outer claw guard plate located between the two outer claw arms; each of the two outer claw arms has a coaxially arranged hinge hole in the middle area, and the inner claw's rotating shaft is inserted into the two hinge holes to achieve hinge; a heating hinge seat for connecting the inner claw telescopic component is provided between the two outer claw arms and above the hinge holes; both outer claw one and outer claw two have rollers at their claw tips, and outer claw one and outer claw two make rolling contact with the wood through the rollers.

[0069] The following describes a preferred embodiment of the outer claw one and the outer claw two with reference to the accompanying drawings.

[0070] like Figure 2 As shown, outer claw 5 consists of outer claw mounting assembly 51, outer claw arm 52, inner claw cylinder body mounting base 53, outer claw guard plate 54, roller 55, and other components. The outer claw mounting assembly 51 is mechanically fixedly connected to the two outer claw arms 52. The inner claw cylinder body mounting base 53 is mechanically fixedly connected to the two outer claw arms 52. The outer claw roller 54 is assembled and installed to the outer claw arms 52 via pins. An outer claw guard plate 54 is provided between the two outer claw arms 52. Outer claw 11 has mounting hinge holes 56 for inner claw 5. Outer claw 2 11 has a similar or identical structure to outer claw 15, and under the synchronous drive of the main cylinder 10, it can provide a balanced gripping force.

[0071] When implementing this invention, as follows Figure 1 As shown, the upper housing 1 and the swing frame 8 are connected and installed via pins. The swing frame 8 and the excavator stick are connected and installed via pins. The main housing 3 and the upper housing 1 are connected via a slewing support 2. Outer jaw 1 5 and outer jaw 2 11 are connected and installed to the main housing 3 via pins. Outer jaw 1 5 and outer jaw 2 11 are also connected to the main hydraulic cylinder 10 via a synchronous connecting rod 4. Inner jaw 1 6 is connected and installed to outer jaw 1 5 via a pin and an inner jaw cylinder 7. Inner jaw 2 12 is connected and installed to the right outer jaw 11 via a pin and an inner jaw cylinder 7. During operation, outer jaw 1 5 and outer jaw 2 11 are driven by the main hydraulic cylinder 10 to open and close synchronously. Inner jaw 1 6 is driven by an inner jaw cylinder 7 to open and close; inner jaw 2 12 is driven by another inner jaw cylinder 7 to open and close. The same hydraulic circuit simultaneously drives two inner gripping cylinders 7, realizing the synchronous opening and closing of inner jaw 1 6 and inner jaw 2 12. The outer jaw 15, inner jaw 16, outer jaw 21, inner jaw 212, and main housing 3 are driven by the rotary motor 9 to achieve 360-degree rotation of the rotary support 2.

[0072] When grabbing timber, the excavator is first fixed in a suitable position. The timber is grabbed and stacked by opening and closing the outer jaws 5 and 11. The inner jaws 6 and 12 provide clamping force to the logs, clamping and securing them, improving the stability of timber transport and effectively solving problems such as timber shifting and scattering. The grabbing capacity of the grabber can also be adjusted by opening and closing the inner jaws 6 and 12, allowing the same grabber to handle different operational scenarios. The angle and position of the material stacking can be adjusted by rotating the main housing 3. During operation, both the inner and outer jaws of the grabber make rolling contact with the logs via rollers, preventing damage to the timber during the grabbing process.

[0073] Figures 7-9 These diagrams illustrate the operating range of the log grabber at full load, half load, and when grabbing a single log. Figure 7 As shown, when the log gripper is fully loaded, the longitudinal range of movement above the log is relatively small, and the inner claws play an auxiliary clamping role. Figure 8 and Figure 9 As shown, when the log gripper is half-loaded or gripping a single log, there is a large longitudinal space above the log, making the transfer process extremely unstable and posing a safety risk. Using the inner claw can provide a stable clamping force, improving the stability and safety of the transfer process.

[0074] In summary, this invention provides a log gripper with hydraulic clamping function. Through hydraulic drive, it generates sufficient and stable clamping force on the material, enabling the gripping, handling, and stacking of timber. This log gripper replaces manual labor, provides stable hydraulic clamping force to hold the timber, improves the stability and safety of the timber gripping and transfer process, and increases the efficiency of continuous operation.

[0075] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0076] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A log gripper with hydraulic clamping function, characterized in that, include: main box; The connecting component is installed on the top surface of the main box, serving two purposes: firstly, to connect with the boom, and secondly, to drive the main box to rotate. Outer claw one and outer claw two are hinged to opposite sides of the main housing. The telescopic outer claw component is arranged in the main box, and the two axial ends of the telescopic outer claw component are hinged to the corresponding outer claws. The wood can be gripped and stacked by opening and closing the outer claw one and the outer claw two. Inner claw one and inner claw two are arranged between outer claw one and outer claw two, and inner claw one is hinged to outer claw one, and inner claw two is hinged to outer claw two. The inner claw telescopic component is hinged between the inner claw one and the outer claw one, and between the inner claw two and the outer claw two. Through the opening and closing operation of the inner claw one and the inner claw two, it provides a clamping force on the wood on the one hand, and can adjust the gripping capacity of the wood gripper on the other hand. Both inner claw one and inner claw two have a hinge component for connecting with the corresponding outer claw and an upwardly protruding arc-shaped clamping component; the arc-shaped clamping component is connected to the middle area of ​​the outer claw through the hinge component, and is driven by the inner claw telescopic component to make the two arc-shaped clamping components swing up and down between the two outer claws. The tip region of the inner claw two has an opening, and the width of the tip region of the inner claw one is smaller than the width of the opening, so that the tip region of the inner claw one can be inserted into the opening of the inner claw two, thereby achieving the clamping function of the two closing and crossing.

2. A log gripper with hydraulic clamping function according to claim 1, characterized in that: When the inner claw 1 and inner claw 2 are fully opened by the inner claw telescopic component, the inner claw 1 and inner claw 2 can retract into the corresponding outer claw, and the inner claw plays an auxiliary role in clamping the wood. When the inner claw 1 and inner claw 2 are fully closed due to the drive of the inner claw telescopic component, the claw tip of inner claw 1 contacts the claw tip of outer claw 2, and the claw tip of inner claw 2 contacts the claw tip of outer claw 1. The distance between the claw tips of inner claw 1 and inner claw 2 is the minimum gripping capacity of the wood gripper.

3. A log gripper with hydraulic clamping function according to claim 1, characterized in that: The arc-shaped clamping components of inner claw one and inner claw two are each composed of two inner claw arms and an inner claw guard plate located between the two inner claw arms. The width of the inner claw guard plate of inner claw one is smaller than the width of the inner claw guard plate of inner claw two; the length of the inner claw guard plate of inner claw one is the same as the length of the inner claw arm, and the length of the inner claw guard plate of inner claw two is smaller than the length of the inner claw arm, thus forming the opening.

4. A log gripper with hydraulic clamping function according to claim 1, characterized in that: Both inner claw one and inner claw two are equipped with rollers at their tips, and both inner claw one and inner claw two make rolling contact with the wood through the rollers.

5. A log gripper with hydraulic clamping function according to claim 1, characterized in that: Both inner claw one and inner claw two are provided with a hinge seat one near the hinge component. A hinge seat two is provided on the outer claw above the hinge seat one. The inner claw telescopic component is connected between the hinge seat one and the hinge seat two. The large swing amplitude of the inner claw is achieved by the small stroke extension and retraction of the inner claw telescopic component.

6. A log gripper with hydraulic clamping function according to claim 5, characterized in that: Both inner claw one and inner claw two have an opening near the hinge component, which is used to meet the range of motion requirements of the inner claw telescopic component during rotation.

7. A log gripper with hydraulic clamping function according to claim 1, characterized in that: Both the first and second outer claws have a hinge component connected to the telescopic component of the outer claw and an upwardly protruding arc-shaped clamping component. Each of the arc-shaped clamping components consists of two outer claw arms and an outer claw guard plate located between the two outer claw arms; each of the two outer claw arms has a coaxially arranged hinge hole in its middle region, and the rotating shaft of the inner claw is inserted into the two hinge holes to achieve hinge connection; a hinge seat for connecting the inner claw telescopic component is provided between the two outer claw arms and above the hinge holes. Both the first and second outer claws are equipped with rollers at their tips, allowing them to roll and contact the wood.

8. A log gripper with hydraulic clamping function according to claim 7, characterized in that: A synchronous link is movably connected between the hinged components of the first and second outer claws, and the synchronous link enables the two outer claws to rotate synchronously.

9. A log gripper with hydraulic clamping function according to claim 1, characterized in that, The connection component includes: The swing frame has a horizontally arranged hinge shaft one and a longitudinally arranged hinge shaft two. The upper hinge shaft one is connected to the stick, enabling the log grabber to swing in the lateral direction. The upper housing is connected to the second hinge shaft, enabling the log gripper to swing in the longitudinal direction; A slewing device is installed between the upper box and the main box to enable the log gripper to rotate 360 ​​degrees.

10. A method for gripping logs using a log gripper with hydraulic clamping function as described in any one of claims 1 to 9, characterized in that: When grabbing timber, first fix the vehicle in a suitable position, then operate the external claw extension component to open and close the external claw one and external claw two to grab and stack the timber. The inner claw telescopic component is operated to open and close the inner claw one and the inner claw two, providing clamping force on the wood to achieve clamping and fixing of the wood. The gripping capacity of the wood gripper can be adjusted by adjusting the closing angle of the inner claw one and the inner claw two, so that the same wood gripper can meet the needs of different operation scenarios. The rotating device in the connecting assembly rotates the main box, thereby adjusting the angle and position of the material stacking.

11. The grasping method according to claim 10, characterized in that: Operate the inner claw extension and retraction mechanism to retract inner claw one and inner claw two into the corresponding outer claws. Inner claw one and inner claw two are in the fully open state, at which time the wood gripper can perform full-load work. The inner claw extension mechanism is operated to close inner claw one and inner claw two, and the intersection of inner claw one and inner claw two is approximately located in the middle of the grasping space formed by the two closed outer claws. At this time, the wood gripper can perform half-load work. The inner claw extension mechanism is operated to bring the tip of inner claw one into contact with the tip of outer claw two, and the tip of inner claw two into contact with the tip of outer claw one. Inner claw one and inner claw two are in a fully closed state, at which point the wood gripper can grip a single piece of wood.

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