Face shovel working device and excavator

Abstract

Disclosed are a front shovel working device and an excavator. The front shovel working device is configured to connect to a platform of the excavator. The front shovel working device includes a bucket, a stick, a boom, a stick hydraulic cylinder and a boom hydraulic cylinder. The bucket, the stick, and the boom are sequentially connected, and the boom is connected to the platform. One end of the stick hydraulic cylinder is hinged with the bucket to form a first hinged point, and another end is hinged with the boom to form a second hinged point. One end of the boom hydraulic cylinder is hinged with the boom to form a third hinged point, and another end is hinged with the platform to form a fourth hinged point. The first hinged point, the second hinged point, the third hinged point, and the fourth hinged point are located in a same vertical plane area, and a boom sidewall structure of the boom coincides with the vertical plane area.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present invention claims priority of Chinese Patent Application No. 202310631481.5, filed on May 31, 2023, which is hereby incorporated by reference in its entirety.TECHNICAL FIELD

[0002] The present invention relates to the field of engineering machinery technologies, and in particular, to a front shovel working device and an excavator.BACKGROUND

[0003] A working device of an excavator is designed to load materials into a bucket for efficient transferring the materials. This working device must be able to withstand both a load of the materials and a digging force used for driving a hydraulic system. Currently, the working devices applied to excavator are mainly divided into two forms: forward shovel and backhoe. Among them, the forward shovel configuration is more widely used in actual operations due to its greater digging force.

[0004] A hinged point of a hydraulic cylinder is usually located outside a side plate of a boom. To enhance a structural strength, auxiliary rockers are often added, and many reinforcing rib plates are also required to be provided on a basic structure of the boom to prolong a service life of the working device. This not only results in redundant structural design and high manufacturing costs, but also a hinge pin at the hinge joint remains subject to a bending moment, which will reduce a service life of each component.SUMMARY Technical Problem

[0005] In view of this, the present invention provides a front shovel working device and an excavator to solve the problems of redundant structural design and a short service life of components in a related front shovel working device of an excavator.Technical Solution

[0006] To achieve above purpose, the present invention provides following technical solution.

[0007] A front shovel working device includes a bucket, a stick, a boom, a stick hydraulic cylinder, and a boom hydraulic cylinder. The bucket, the stick, and the boom are sequentially connected, and the boom is connected to a platform.

[0008] One end of the stick hydraulic cylinder is hinged with the bucket to form a first hinged point, and another end of the stick hydraulic cylinder is hinged with the boom to form a second hinged point. One end of the boom hydraulic cylinder is hinged with the boom to form a third hinged point, and another end of the boom hydraulic cylinder is hinged with the platform to form a fourth hinged point. The first hinged point, the second hinged point, the third hinged point, and the fourth hinged point are located in a same vertical plane area, and a boom side wall structure (301) of the boom coincides with the vertical plane area.

[0009] In an embodiment, the bucket, the stick, the boom, and the platform are sequentially hinged to form a fifth hinged point, a sixth hinged point, and a seventh hinged point, the fifth hinged point, the sixth hinged point, and the seventh hinged point are all located in the vertical plane area, and a stick side wall structure of the stick coincides with the vertical plane area.

[0010] In an embodiment, a support member is provided directly below the boom side wall structure, the stick, the stick hydraulic cylinder, and the boom hydraulic cylinder are all hinged with the support member, the stick hydraulic cylinder is located below the stick, and the boom hydraulic cylinder is located below the boom.

[0011] In an embodiment, the support member is integrally cast or forged.

[0012] In an embodiment, a wall surface of the support member is provided with a lightening recess.

[0013] In an embodiment, the boom includes the boom side wall structure and a boom bottom structure fixedly connected between the boom side wall structures located at two opposite sides, and the support member is fixedly connected with the boom side wall structure and the boom bottom structure.

[0014] In an embodiment, the support member includes: a main body part, which is hinged with the stick, the stick hydraulic cylinder, and the boom hydraulic cylinder; a side connecting part, which is in surface contact with and fixed to the boom side wall structure; top connecting part, which is in surface contact with and fixed to the boom bottom structure, and is located on an inner side of the side connecting part; and an outer edge part, which protrudes outward relative to the side connecting part, and collectively covers above the main body part together with the top connecting part.

[0015] In an embodiment, hinged holes of the support member include: a first hinged hole, including two holes axially opposite to each other and respectively located on two sides of a connecting lug of the stick; a second hinged hole, including a single hole located on a hinge seat of the stick hydraulic cylinder; and a third hinged hole, including a single hole located on a hinge seat of the boom hydraulic cylinder.

[0016] In an embodiment, an end of the boom hinged to the platform is a flush structure or a double fork structure recessed along a length direction of the boom.

[0017] An excavator, which includes the front shovel working device in any of the above embodiment.Beneficial Effects

[0018] A front shovel working device provided in the present invention which is used for connecting to a platform of an excavator, includes a bucket, a stick, a boom, a stick hydraulic cylinder and a boom hydraulic cylinder. The bucket, the stick, and the boom are sequentially connected, and the boom is connected to the platform. One end of the stick hydraulic cylinder is hinged with the bucket to form the first hinged point, and another end of the stick hydraulic cylinder is hinged with the boom to form a second hinged point. One end of the boom hydraulic cylinder is hinged with the boom to form a third hinged point, and another end of the boom hydraulic cylinder is hinged with the platform to form a fourth hinged point. The first hinged point, the second hinged point, the third hinged point, and the fourth hinged point are located in a same vertical plane area, and a boom side wall structure (301) of the boom (3) coincides with the vertical plane area. With this arrangement, when the front shovel working device is in operation, the stick hydraulic cylinder and the boom hydraulic cylinder extend and retract to transmit power, since all the four hinged point are in one vertical plane area, and the boom side wall structure also falls within the vertical plane area, so that the second hinged point, the third hinged point, and the fourth hinged point all face the boom side wall structure directly in a vertical direction, and simultaneously exert forces on the boom side wall structure directly. In this way, it is ensured that the force transmitted to the boom side wall structure is transmitted along an extension plane of the side wall structure, resulting in more uniform stress distribution, so that preventing shear forces from being generated in the stick and boom due to hinged point misalignment, thereby avoiding bending moments on a pin at the hinged point, and thus optimizing an overall mechanical structure to prolong a service life of each component. In addition, the boom side wall structure has a strong overall strength, and a hinged point force is directly borne by the boom side wall structure, thereby avoiding a requirement for additional reinforcement structures while ensuring that the front shovel device has an excellent structural strength, and thus solving problems of redundant structural design and a short service life of a component of a front shovel working device of an excavator in the conventional technologies.BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or in the conventional technologies, the drawings required in the description of the embodiments or the conventional technologies will be briefly introduced in the following. Obviously, the drawings in the following description are only the embodiments of the present invention. For those with ordinary skill in the art, other drawings can be obtained from the provided drawings without creative effort. FIG. 1 is an axonometric view of a front shovel working device according to an embodiment of the present invention. FIG. 2 is a bottom view of a front shovel working device according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a connection between a boom and a support member according to an embodiment of the present invention. FIG. 4 is a schematic structural diagram of a support member according to an embodiment of the present invention.

[0020] In FIG. 1 to FIG.4: 1. bucket; 2. stick; 3. boom; 4. stick hydraulic cylinder; 5. boom hydraulic cylinder; 6. auxiliary hydraulic cylinder; 7. support member; 8. first hinged point; 9. second hinged point; 10. third hinged point; 11. fourth hinged point; 12. fifth hinged point; 13. sixth hinged point; 14. seventh hinged point; 201. stick side wall structure; 301. boom side wall structure; 302. boom bottom structure; 303. double fork structure; 701. main body part; 702. side connecting part; 703. top connecting part; 704. outer edge part; 705. first hinged hole; 706. second hinged hole; 707. third hinged hole; 708. lightening recess. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a portion of the embodiments of the present application, rather than all of them. Based on the embodiments in the present application, all other embodiments obtained by those with ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0022] As shown in FIG. 1 to FIG. 2, embodiments of the present application provide a front shovel working device for connecting to a platform of an excavator. The front shovel device includes a bucket 1, a stick 2, a boom 3, a stick hydraulic cylinder 4 and a boom hydraulic cylinder 5. The bucket 1, the stick 2, and the boom 3 are sequentially connected, and the boom 3 is connected to the platform. One end of the stick hydraulic cylinder 4 is hinged with the bucket 1 to form a first hinged point 8, and another end is hinged with the boom 3 to form a second hinged point 9. One end of the boom hydraulic cylinder 5 is hinged with the boom 3 to form a third hinged point 10, and another end is hinged with platform to form a fourth hinged point 11. The first hinged point 8, the second hinged point 9, the third hinged point 10, and the fourth hinge 11 are located in a same vertical plane area, that is, center lines of the boom cylinder 4 and the arm cylinder 5 are located in the same vertical plane area, and a boom side wall structure 301 of the boom 3 coincides with the vertical plane area. Above description of a relationship between the boom side wall structure 301 and the vertical plane area is for the boom side wall structure 301 on one side of the boom 3. Since the boom 3 has the boom side wall structures 301 on two opposite sides, the other boom side wall structure 301 on the other side of the boom 3 is the same, that is, the two vertical plane areas are parallel and a distance therebetween is approximately equal to a width of the boom 3. A hinged point is a center point at the hinged position where transmission of a force is concentrated.

[0023] In this way, when the front shovel working device is in operation, the stick hydraulic cylinder 4 and the boom hydraulic cylinder 5 extend and retract to transmit power, since all the four hinged point are in one vertical plane area, and the boom side wall structure 301 also falls in the vertical plane area, so that the second hinged point 9, the third hinged point 10, and the fourth hinged point 11 all face the boom side wall structure 301 directly in a vertical direction, and simultaneously exert forces on the boom side wall structure 301 directly. In this way, it is ensured that the force transmitted to the boom side wall structure 301 is transmitted along an extension plane of the side wall structure, resulting in more uniform stress distribution, so that preventing shear force from being generated in the stick 2 and the boom 3 due to hinged point misalignment, thereby avoiding bending moment on a pin at the hinged point, and thus optimizing an overall mechanical structure to prolong a service life of each component. In addition, the boom side wall structure 301 has a strong overall strength, and a hinged point force is directly borne by the boom side wall structure 301, thereby avoiding a requirement for additional reinforcement structures while ensuring that the front shovel device has an excellent structural strength, and thus solving problems of redundant structural design and a short service life of a component of a front shovel working device of an excavator in the conventional technologies, and being beneficial to reduce a weight and manufacturing cost of the working device.

[0024] A design of the present invention abandons inherent design ideas for a structure of the working device in the field, and achieves structural reinforcement through cleverly re-layouts of the structure rather than by adding structures. Therefore, the structural strength is maintained based on a basic structure, thereby achieving outstanding technical effects through a completely different design idea without a requirement for large investment, and thus having strong practicality.

[0025] An auxiliary hydraulic cylinder 6 is also hinged between the stick 2 and the boom 3, which is a conventional design in the prior art and will not be repeated herein.

[0026] In an embodiment, the bucket 1, the stick 2, the boom 3, and the platform are sequentially hinged to form a fifth hinged point 12, a sixth hinged point 13, and a seventh hinged point 14. The fifth hinged point 12, the sixth hinged point 13, and the seventh hinged point 14 are all located in the vertical plane area, and the stick side wall structure 201 of the stick 2 coincides with the vertical plane area.

[0027] In this way, a position design and layout of other components in the front shovel working device are also optimized, so that the first hinged point 8 is directly aligned with the stick side wall structure 201 in the vertical direction, that is, from a top view, the first hinged point 8, the second hinged point 9, the third hinged point 10, the fourth hinged point 11, the fifth hinged point 12, the sixth hinged point 13, the seventh hinged point 14, the stick side wall structure 201, and the boom side wall structure 301 are located on a same straight line. In this way, an action force of the hydraulic cylinder and a reaction force of the pin at hinged point are distributed in an area of the entire working device with a highest structure strength, and the force distribution is more uniform, so that the overall mechanical structure of front shovel working device is further optimized and improved, and thus the service life is further prolonged.

[0028] In an embodiment, as shown in FIG. 3 and FIG.4, the boom side wall structure 301 is fixedly connected to a support member 7 directly below a position near the stick 2. The support member 7 is provided with hinged holes, and the stick 2, the stick hydraulic cylinder 4, and the boom hydraulic cylinder 5 are all hinged with the support member 7. The stick hydraulic cylinder 4 is located below the stick 2, and the boom hydraulic cylinder 5 is located below the boom 3.

[0029] In this way, since a plurality of hinged points are concentrated on the boom 3, and the support member 7 as a connection structure enhances a structural strength of the boom 3, that is, the hinged point acting on the boom 3 is integrated on a position with a strongest structural strength, which is beneficial to prolong a structural life.

[0030] Further, the support member 7 is integrally cast or forged. Abandoning a traditional welded structure in the conventional technologies, so that a force-bearing capacity is optimized through an integrated structure.

[0031] In an embodiment, a wall surface of the support member 7 is provided with several lightening recesses 708, the lightening recesses 708 are specifically located on the wall surface between adjacent hinged holes, and connection edges of the lightening recesses 708 and a main body of the support member 7 are all arc-shaped. In this way, the structural strength required by the support member 7 is met, and lightening is achieved. Moreover, an arc-shaped connection design of the lightening recess 708 optimize stress transmission and dispersion, thereby avoiding stress concentration.

[0032] In an embodiment, as shown in FIG. 3, the boom 3 includes the boom side wall structure 301 and a boom bottom structure 302 fixedly connected between the boom side wall structures 301 located on two opposite sides. The support members 7 are designed on both sides, and the support member 7 is fixedly connected to the boom side wall structure 301 and boom bottom structure 302. The boom side wall structure 301 and the boom bottom structure 302 may be plate structures in conventional designs. In this way, structural components of the support member 7 and the boom 3 are connected to each other, thereby enhancing an overall structural strength of the boom 3.

[0033] Further, as shown in FIG. 4, the support member 7 includes a main body part 701, a side connecting part 702, a top connecting part 703 and an outer edge part 704. The main body part 701 is provided with hinged holes, and is hinged with the stick 2, the stick hydraulic cylinder 4 and the boom hydraulic cylinder 5. The side connecting part 702 is in surface contact with and fixed to the boom side wall structure 301, and specifically it may be welded with the boom side wall structure 301. The top connecting part 703 is in surface contact with and fixed to the boom bottom structure 302, and specifically it may be welded with the boom bottom structure 302. The top connecting part 703 and the side connecting part 702 form a right-angle or approximately right-angle relationship, and the top connecting part 703 is located on an inner side of the side connecting part 702, where the inner side refers to a space between two boom side wall structures 301. The outer edge part 704 protrudes outward relative to the side connecting part 702, and collectively covers above the main body part 701 together with the top connecting part 703. In this way, it ensures stable fixation and uniform force distribution, thereby having a good mechanical structural performance.

[0034] In addition, more specifically, the hinged holes of the support member 7 includes first hinged holes 705, a second hinged hole 706, and a third hinged hole 707. The first hinged hole 705 includes two holes axially opposite to each other and respectively located on two sides of a connecting lug of the stick 2, or the two first hinged holes 705 are in a U-shaped double-hole, allowing a connecting lug of the stick 2 to extend into the support member 7 and being hinged. The second hinged hole 706 includes a single hole on a hinge seat of the stick hydraulic cylinder 4, that is, the second hinged hole 706 is located on the hinge seat of the stick hydraulic cylinder 4, or the hinge seat of the stick hydraulic cylinder 4 is located on two sides of the support member 7, and the hinge seat of the stick hydraulic cylinder 4 may also be called a double lug ring. The third hinged hole 707 includes a single hole on a hinge seat of the boom hydraulic cylinder 5, that is, the third hinged hole 707 is located on the hinge seat of the boom hydraulic cylinder 5, or the hinge seat of the boom hydraulic cylinder 5 is located on two sides of the support member 7, and the hinge seat of the boom hydraulic cylinder 5 may also be called a double lug ring. The above is explanation of one side of the support member 7, and another side is the same. In this way, the single hole and the U-shaped double hole are reasonably configured, a form of the single hole is beneficial to enhance the structural strength of the support member 7 itself, while the double hole is beneficial to connect to the stick 2 stably, thereby optimizing a mechanical model as a whole.

[0035] In an embodiment, an end of the boom 3 hinged with the platform is a flush structure or a double fork structure 303 recessed along a length direction of the boom 3. The flush structure means that the end of the boom 3 is a traditional non-deformed structure, basically presenting a rectangular end, which extends into a hinged structure of the platform when connected to the platform. The double fork structure 303 is U-shaped, and when connected to the platform, a middle space is beneficial to avoid other structures on the platform.

[0036] In addition, a specific composition of the stick 2 is a conventional existing design, including a bottom structure of the stick and stick side wall structures 201 located on two opposite sides thereof, which are also plate structures.

[0037] Based on the above front shovel working device, embodiments of the present invention also provide an excavator, which includes a platform, a host provided on the platform, and a front shovel working device connected with the platform. The front shovel working device is the above-mentioned front shovel working device. The excavator has the above-mentioned front shovel working device, please refer to the above content, which will not be repeated herein.

[0038] The basic principles of the present invention are described in combined with specific embodiments above. However, it should be pointed out that, the advantages, strengths, effects, and the like mentioned in the present invention are only examples and are not intended to limit the present invention, and it cannot be considered that these advantages, strengths, effects, and the like are necessary for each embodiment of the present invention. In addition, the specific details disclosed above are only for illustrative purposes and ease of understanding, and are not intended to limit the present invention, and the above details do not limit the present invention to be implemented with the above specific details.

[0039] The block diagrams of devices, apparatuses, equipment, and systems involved in the present invention are only illustrative examples, and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems may be connected, arranged, and configured in any way. Words such as "including", "containing"," "having'", and the like are open-ended words, meaning 'including but not limited to', and may be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or", and may be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase: "such as but not limited to", and may be used interchangeably with it.

[0040] In the devices, equipment, and methods of the present invention, each component or each step may be decomposed and / or recombined. These decompositions and / or recombination should be regarded as equivalent solutions of the present invention.

[0041] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. It should be understood that the terms "first", "second", "third", "fourth", "fifth", and "sixth" used in the description of the embodiments of the present application are only used for clarifying the technical solution, and cannot be used for limiting the scope of protection of the present application.

[0042] The above description has been provided for the purposes of illustration and description. Moreover, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A front shovel working device, comprising a bucket (1), a stick (2), a boom (3), a stick hydraulic cylinder (4), and a boom hydraulic cylinder (5), wherein the bucket (1), the stick (2), and the boom (3) are sequentially connected, and the boom (3) is connected to a platform; one end of the stick hydraulic cylinder (4) is hinged with the bucket (1) to form a first hinged point (8), and another end of the stick hydraulic cylinder (4) is hinged with the boom (3) to form a second hinged point (9); and one end of the boom hydraulic cylinder (5) is hinged with the boom (3) to form a third hinged point (10), and another end of the boom hydraulic cylinder (5) is hinged with the platform to form a fourth hinged point (11); and the first hinged point (8), the second hinged point (9), the third hinged point (10), and the fourth hinged point (11) are located in a same vertical plane area, and a boom side wall structure (301) of the boom (3) coincides with the vertical plane area.

2. The front shovel working device according to claim 1, wherein the bucket (1), the stick (2), the boom (3), and the platform are sequentially hinged to form a fifth hinged point (12), a sixth hinged point (13), and a seventh hinged point (14), the fifth hinged point (12), the sixth hinged point (13), and the seventh hinged point (14) are all located in the vertical plane area, and a stick side wall structure (201) of the stick (2) coincides with the vertical plane area.

3. The front shovel working device according to claim 1 or claim 2, wherein a support member (7) is provided directly below the boom side wall structure (301), the stick (2), the stick hydraulic cylinder (4), and the boom hydraulic cylinder (5) are all hinged with the support member (7), the stick hydraulic cylinder (4) is located below the stick (2), and the boom hydraulic cylinder (5) is located below the boom (3).

4. The front shovel working device according to claim 3, wherein the support member (7) is integrally cast or forged.

5. The front shovel working device according to claim 3 or claim 4, wherein a wall surface of the support member (7) is provided with a lightening recess (708).

6. The front shovel working device according to any one of claims 3 to 5, wherein the boom (3) comprises the boom side wall structures (301) and a boom bottom structure (302) fixedly connected between the boom side wall structures (301) located at two opposite sides, and the support member (7) is fixedly connected with the boom side wall structure (301) and the boom bottom structure (302).

7. The front shovel working device according to claim 6, wherein the support member (7) comprises: a main body part (701), which is hinged with the stick (2), the stick hydraulic cylinder (4), and the boom hydraulic cylinder (5); a side connecting part (702), which is in surface contact with and fixed to the boom side wall structure (301); a top connecting part (703), which is in surface contact with and fixed to the boom bottom structure (302), and is located on an inner side of the side connecting part (702); and an outer edge part (704), which protrudes outward relative to the side connecting part (702), and collectively covers above the main body part (701) together with the top connecting part (703).

8. The front shovel working device according to any one of claims 3 to 7, wherein hinged holes of the support member (7) comprise: a first hinged hole (705), comprising two holes axially opposite to each other and respectively located on two sides of a connecting lug of the stick (2); a second hinged hole (706), comprising a single hole located on a hinge seat of the stick hydraulic cylinder (4); and a third hinged hole (707), comprising a single hole located on a hinge seat of the boom hydraulic cylinder (5).

9. The front shovel working device according to any one of claims 1 to 8, wherein an end of the boom (3) hinged to the platform is a flush structure or a double fork structure (303) recessed along a length direction of the boom (3).

10. An excavator, comprising the front shovel working device according to any one of claims 1-9.

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