Excavator and chassis main frame device thereof

Abstract

The chassis main frame device comprises a cover plate, a bottom plate arranged below the cover plate and a supporting cylinder connected between the cover plate and the bottom plate, a plurality of first rib plates are connected between the cover plate and the bottom plate, pipeline via holes are formed in the first rib plates, a plurality of lifting lugs are arranged at the top of the cover plate, and the supporting cylinder is connected with the cover plate and the bottom plate. The top of the cover plate is provided with an oil injection pool and a mounting hole, the mounting hole is formed between the oil injection pool and the lifting lug, a connector support is arranged in the oil injection pool, the two ends of the cover plate extend downwards to form arc-shaped plates, wear-resisting plates are arranged above the arc-shaped plates, the two ends of the bottom plate extend horizontally to form supporting plates, and the supporting plates are arranged below the arc-shaped plates. A connecting plate is vertically arranged at the bottom of the supporting plate, and a first base plate is arranged at the top of the supporting plate; the fastening piece is simple in structure, torque is resisted through rigid connection instead of traditional pressing friction force, the load borne by the fastening piece during work is greatly reduced, and potential safety hazards are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of excavators, and in particular relates to an excavator and a chassis main frame device thereof. Background Art

[0002] An excavator is an earth-moving machine that uses a bucket to dig materials above or below the bearing surface and loads them into transport vehicles or unloads them to stockpiles. The materials excavated by the excavator are mainly soil, coal, silt, and pre-loosened soil and rocks. Judging from the development of construction machinery in recent years, the development of excavators has been relatively rapid. Excavators have become one of the most important construction machinery in engineering construction. Common excavator structures include power units, working devices, slewing mechanisms, operating mechanisms, transmission mechanisms, traveling mechanisms and auxiliary facilities, among which the chassis is an important structure in the traveling mechanism.

[0003] In the prior art, the chassis structure of excavators in the industry is roughly divided into two types: welded and assembled. On small and medium-sized excavators, in order to meet the strength requirements and to improve the stability of the overall chassis structure, a welded chassis is usually used, while on large and super-large excavators, the chassis often adopts an assembled structure. This solution is to split the chassis into three major parts: a left walking beam, a right walking beam, and a main frame on the basis of a welded structure. Fasteners are used to connect them instead of welding. While meeting the overall walking and support requirements of the excavator, it can also be split into three major parts during assembly and transportation, which not only avoids the width and height restrictions in the road transportation process in the national standard, but also allows the chassis to be divided into three parts for separate transportation to disperse the overall transportation weight.

[0004] However, this chassis sub-assembly structure has poor strength and torsion resistance and a high failure rate when subjected to the extremely large torque generated by the excavator during turning, climbing and other complex working conditions. In summary, there is an urgent need for a high-strength, high-torsion-resistant excavator and its chassis main frame device. Summary of the invention

[0005] In order to solve part or all of the technical problems existing in the above-mentioned prior art, the present invention provides an excavator and a chassis main frame device thereof.

[0006] In one aspect, the chassis main frame device for an excavator provided by the present invention comprises a cover plate, a bottom plate arranged below the cover plate, and a support cylinder connected between the cover plate and the bottom plate, wherein:

[0007] A plurality of first ribs are vertically connected between the cover plate and the bottom plate, the first rib is connected to the outer wall of the support tube, a pipeline through hole is provided on the first rib, a plurality of lifting ears are evenly arranged on the top of the cover plate along the central circumference of the support tube, an oil filling pool is provided at the center of the top of the cover plate, a circle of mounting holes are provided on the top of the cover plate along the central circumference of the oil filling pool, the mounting holes are arranged between the oil filling pool and the lifting ears, a joint support connected to the cover plate is arranged in the oil filling pool, arc plates extend downward at both ends of the cover plate, a wear-resistant plate is arranged above the arc plate, support plates extend horizontally at both ends of the bottom plate, the support plates are arranged below the arc plate, the support plates and the arc plates are connected by the first rib, a connecting plate is vertically arranged at the bottom of the support plate, a first pad is arranged on the top, and a second pad is arranged on one side of the connecting plate.

[0008] Furthermore, in the above-mentioned chassis main frame device for excavators, the joint support is a trapezoidal structure, with both ends respectively connected to the top of the cover plate, and the middle part of the joint support is located in the oil filling pool and is lower than the top end surface of the oil filling pool.

[0009] Furthermore, in the above-mentioned chassis main frame device for an excavator, a second rib plate is provided between the bottom plate and a side of the connecting plate away from the second pad.

[0010] As a specific implementation, in the above-mentioned chassis main frame device for an excavator, a reinforcing plate is provided on the oblique side of the second rib plate, and a maintenance hole is opened on the reinforcing plate.

[0011] As a specific implementation, in the above-mentioned chassis main frame device for an excavator, an oil filling hole is opened on the cover plate, and the oil filling hole is arranged between the mounting hole and the oil filling pool.

[0012] As a specific implementation, in the above-mentioned chassis main frame device for an excavator, a first connecting hole is formed on the first pad.

[0013] As a specific implementation, in the above-mentioned chassis main frame device for an excavator, a second connecting hole is formed on the second pad.

[0014] As a specific implementation, in the above-mentioned chassis main frame device for an excavator, the number of the lifting ears is 4 to 8.

[0015] As a specific implementation, in the above-mentioned chassis main frame device for an excavator, it is characterized in that the number of the first ribs is 4 to 8.

[0016] On the other hand, the present invention further provides an excavator, which includes the above-mentioned chassis main frame device.

[0017] The excavator and the chassis main frame device thereof of the present invention have the following advantages and positive effects:

[0018] (1) Based on the original subassembly structure, the present invention adds four groups of assembly surfaces, including mounting holes, first connection holes, second connection holes, and joint supports, which disperses the overall torque of the chassis and converts the traditional compression friction force to resist torque through rigid connection, greatly reducing the load borne by the fasteners during operation, reducing safety hazards, and enabling the chassis to provide more stable support during the operation of the excavator;

[0019] (2) The present invention arranges pipeline holes so that most of the pipelines can be stored inside the walking beam and the frame while meeting the needs of running pipeline arrangement, thereby reducing the external protection structure, optimizing the design, achieving lightweight structure, and reducing the overall size of the protection device, thereby reducing the failure rate. In addition, a lifting lug is arranged on the top cover, and during transportation, the device can be lifted by cooperation between the lifting equipment and the lifting lug, which makes transportation of the device more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of a chassis main frame device for an excavator of the present invention;

[0022] Figure 2 yes Figure 1 A partial enlarged view of part Ⅰ.

[0023] Description of reference numerals:

[0024] 1-cover plate, 11-lifting ear, 12-mounting hole, 2-bottom plate, 3-support tube, 4-first rib plate, 5-oil filling pool, 6-joint support, 7-arc plate, 71-wear-resistant plate, 8-support plate, 81-first pad, 82-first connecting hole, 9-connecting plate, 91-second pad, 92-second connecting hole, 93-second rib plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] like Figure 1 to Figure 2 As shown, the present invention provides an excavator and a chassis main frame device thereof.

[0027] On the one hand, a chassis main frame device for an excavator is disclosed, comprising a cover plate 1, a bottom plate 2 arranged below the cover plate 1, and a support tube 3 connected between the cover plate 1 and the bottom plate 2. A through hole is opened in the middle of the cover plate 1, wherein a plurality of first rib plates 4 are vertically connected between the cover plate 1 and the bottom plate 2, the first rib plates 4 are connected to the outer wall of the support tube 3, and pipeline through holes (not shown in the figure) are opened on the first rib plates 4. More specifically, pipeline through holes are opened on the two first rib plates 4 at the rear end respectively, and the travel hydraulic pipeline can pass through the pipeline through holes, thereby changing the arrangement direction of the original travel hydraulic pipeline. While satisfying the travel pipeline arrangement, the setting of the pipeline through holes retracts most of the pipelines into the walking beam and the frame, reducing the external protection structure, optimizing the design, and reducing the overall size of the protection device, which can reduce the failure rate A plurality of lifting ears 11 are evenly arranged along the circumference of the center of the support tube 3 on the top of the cover plate 1, an oil filling pool 5 is arranged at the center of the top of the cover plate 1, the oil filling pool 5 is a cylindrical enclosure plate, which is connected to the through hole on the cover plate 1, a circle of mounting holes 12 are opened along the circumference of the center of the oil filling pool 5 on the top of the cover plate 1, the mounting holes 12 are arranged between the oil filling pool 5 and the lifting ears 11, a joint support 6 connected to the cover plate 1 is arranged in the oil filling pool 5, arc plates 7 are extended downward at both ends of the cover plate 1, a wear-resistant plate 71 is arranged above the arc plate 7, support plates 8 are horizontally extended at both ends of the bottom plate 2, the support plate 8 is arranged below the arc plate 7, the support plate 8 and the arc plate 7 are connected by a first rib plate 4, a connecting plate 9 is vertically arranged at the bottom of the support plate 8, a first pad 81 is arranged on the top, the first pad 81 is arranged on both sides of the arc plate 7, and a second pad 91 is arranged on one side of the connecting plate 9.

[0028] Furthermore, in the chassis main frame device for an excavator of the present invention, the joint support 6 is a trapezoidal structure, with both ends respectively connected to the top of the cover plate 1, the middle of the joint support 6 is located in the oil filling pool 5 and is lower than the top end surface of the oil filling pool 5, and a circular hole is opened in the middle of the joint support 6.

[0029] Furthermore, in the chassis main frame device for the excavator of the present invention, a second rib plate 93 is arranged between the side of the connecting plate 9 away from the second pad 91 and the bottom plate 2. More specifically, two second rib plates 93 parallel to each other are arranged. Such an arrangement improves the stability between the connecting plate 9 and the bottom plate 2. When the second pad 91 is connected to other mechanisms, the second rib plate 93 can provide a certain supporting force.

[0030] As a specific embodiment, in the chassis main frame device for an excavator of the present invention, the second rib plate 93 is a right triangle, and a reinforcement plate (not shown in the figure) is arranged on its hypotenuse. The reinforcement plate is arranged on the two corresponding hypotenuse end faces of the second rib plate 93, and a maintenance hole (not shown in the figure) is also opened on the reinforcement plate. More specifically, maintenance holes are respectively opened on the two reinforcement plates at the rear end. With this arrangement, the maintenance holes can facilitate the installation of the internal rubber sheath and the subsequent inspection and maintenance of the hydraulic pipeline.

[0031] As a specific embodiment, in the chassis main frame device for an excavator of the present invention, an oil filling hole (not shown in the figure) is opened on the cover plate 1, and the oil filling hole is arranged between the mounting hole 12 and the oil filling pool 5. Lubricant can be injected into the cover plate 1 through the oil filling hole to facilitate lubrication of the entire device.

[0032] As a specific embodiment, in the chassis main frame device for an excavator of the present invention, a first connecting hole 82 is opened on the first pad 81, and the first connecting hole 82 is a horizontal connecting hole. Components in the horizontal direction can be connected to the first pad 81 through the first connecting hole 82.

[0033] As a specific embodiment, in the chassis main frame device for an excavator of the present invention, a second connecting hole 92 is opened on the second pad 91, and the second connecting hole 92 is a vertical connecting hole. The second connecting hole 92 can be used to connect vertical components to the second pad 91.

[0034] As a specific implementation, in the chassis main frame device for an excavator of the present invention, the number of the lifting ears 11 is 4 to 8, more specifically, the number of the lifting ears 11 is 4, and the four lifting ears 11 are evenly spaced along the center of the oil filling pool 5. Of course, the distribution position, shape and size of the specific lifting ears 11 need to be set according to the specific working conditions during actual use. With such a setting, during transportation, the lifting of the device can be carried out through the cooperation between the lifting equipment and the lifting ears 11.

[0035] As a specific implementation, in the chassis main frame device for an excavator of the present invention, the number of the first ribs 4 is 4 to 8, more specifically, the number of the first ribs 4 is 4, one end of the first rib 4 is connected to the outer periphery of the support tube 3, and the other end extends between the arc plate 7 and the support plate 8. Of course, the specific distribution position, shape and size of the first rib 4 need to be set according to the specific working conditions during actual use.

[0036] On the other hand, the present invention further provides an excavator, which includes the above-mentioned chassis main frame device.

[0037] In summary, compared with the prior art, the excavator and the chassis main frame device of the present invention have the following advantages and positive effects:

[0038] (1) Based on the original subassembly structure, the present invention adds four sets of assembly surfaces, namely, the mounting hole 12, the first connection hole 82, the second connection hole 92, and the joint support 6, which disperses the overall torque of the chassis, converts the traditional compression friction force to resist the torque through rigid connection, greatly reduces the load borne by the fasteners during operation, reduces safety hazards, and enables the chassis to provide more stable support during the operation of the excavator;

[0039] (2) The present invention arranges pipeline holes so that most of the pipelines can be stored inside the walking beam and the frame while meeting the needs of running pipeline arrangement, thereby reducing the external protection structure, optimizing the design, achieving lightweight structure, and reducing the overall size of the protection device, thereby reducing the failure rate. In addition, a lifting lug 11 is arranged on the cover plate 1. During transportation, the device can be lifted by cooperation between the lifting equipment and the lifting lug 11, which makes transportation of the device more convenient.

[0040] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chassis main frame device for an excavator, characterized in that: The chassis main frame device for the excavator includes a cover plate, a bottom plate arranged below the cover plate, and a support cylinder connected between the cover plate and the bottom plate, wherein: A plurality of first ribs are vertically connected between the cover plate and the bottom plate, the first rib is connected to the outer wall of the support tube, a pipeline through hole is provided on the first rib, a plurality of lifting ears are evenly arranged on the top of the cover plate along the central circumference of the support tube, an oil filling pool is provided at the center of the top of the cover plate, a circle of mounting holes are provided on the top of the cover plate along the central circumference of the oil filling pool, the mounting holes are arranged between the oil filling pool and the lifting ears, a joint support connected to the cover plate is arranged in the oil filling pool, arc plates extend downward at both ends of the cover plate, a wear-resistant plate is arranged above the arc plate, support plates extend horizontally at both ends of the bottom plate, the support plates are arranged below the arc plate, the support plates and the arc plates are connected by the first rib, a connecting plate is vertically arranged at the bottom of the support plate, a first pad is arranged on the top, and a second pad is arranged on one side of the connecting plate.

2. The chassis main frame device for an excavator according to claim 1, characterized in that: The joint support is a trapezoidal structure, with two ends respectively connected to the top of the cover plate, and the middle of the joint support is located in the oil filling pool and is lower than the top end surface of the oil filling pool.

3. The chassis main frame device for an excavator according to claim 1, characterized in that: A second rib plate is arranged between the bottom plate and a side of the connecting plate away from the second pad plate.

4. The chassis main frame device for an excavator according to claim 3, characterized in that: A reinforcing plate is arranged on the oblique side of the second rib plate, and a maintenance hole is opened on the reinforcing plate.

5. The chassis main frame device for an excavator according to claim 1, characterized in that: The cover plate is provided with an oil filling hole, and the oil filling hole is arranged between the mounting hole and the oil filling pool.

6. The chassis main frame device for an excavator according to claim 1, characterized in that: The first pad is provided with a first connecting hole.

7. The chassis main frame device for an excavator according to claim 1, characterized in that: The second pad is provided with a second connecting hole.

8. The chassis main frame device for an excavator according to claim 1, characterized in that: The number of the lifting ears is 4 to 8.

9. The chassis main frame device for an excavator according to claim 1, characterized in that: The number of the first ribs is 4 to 8.

10. An excavator, characterized in that: The excavator comprises the chassis main frame device according to any one of claims 1-9.

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