Excavator movable arm supporting device and excavator

Abstract

The utility model provides an excavator movable arm supporting device and an excavator, and relates to the technical field of excavators. The utility model provides an excavator movable arm supporting device which comprises two oppositely-arranged bearing seats, two oppositely-arranged side plates, a top plate, a bottom plate, a front supporting plate, a rear supporting plate and a middle supporting plate, and the bearing seats are located at the rear end of the supporting device. The rear end of the side plate is connected to the bearing seat; the top plate is connected to top ends of the side plates; the bottom plate is connected to the bottom ends of the two side plates and is connected with the bearing seat; the front supporting plate is arranged at the front end of the supporting device and connected with the front ends of the side plates, the front end of the top plate and the front end of the bottom plate, and a first process hole is formed in the front supporting plate; the rear supporting plate is connected to the rear end of the bottom plate and the rear end of the top plate and connected with the bearing seat. The middle supporting plate is arranged in the cavity. The excavator movable arm supporting device and the excavator are simple in process and high in structural strength.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, and in particular to an excavator boom support device and an excavator. Background Technology

[0002] Hydraulic excavators are mainly composed of multiple systems, including a traveling device, a slewing platform, and a working device. The working device typically includes the boom, stick, bucket, and drive mechanism. The front end of the boom is connected to the bucket, and the rear end of the boom is rotatably connected to the slewing platform via a support base. Under the driving force of the drive mechanism, the boom can rotate around the slewing platform, thus performing operations via the bucket. Therefore, the support base connecting the boom and the platform needs to bear a huge load during excavator operation, requiring high structural strength. However, existing support base technologies suffer from complex manufacturing processes, insufficient structural strength, and a tendency for welds to crack. Utility Model Content

[0003] To address at least one of the problems mentioned in the background art, this utility model provides an excavator boom support device and an excavator, which has a simple manufacturing process and high structural strength.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] In a first aspect, this utility model provides an excavator boom support device, integrally cast, comprising:

[0006] Two opposing bearing housings are located at the rear end of the support device and are used to hinge with the excavator's slewing platform;

[0007] Two oppositely positioned side plates, with their rear ends connected to different bearing seats;

[0008] The top plate is connected to the top of the two side plates and to the bearing housing;

[0009] The base plate is connected to the bottom ends of the two side plates and to the bearing housing;

[0010] A front support plate is located at the front end of the support device and is connected to the front ends of the side plate, the top plate, and the bottom plate. A first process hole is provided on the front support plate. The front ends of the side plate, the top plate, and the bottom plate are configured to connect with the boom of the excavator.

[0011] The rear support plate is connected to the rear end of the base plate and the rear end of the top plate, and is connected to the bearing housing;

[0012] The intermediate support plate, side plates, top plate, bottom plate, front support plate, and rear support plate together enclose the molding cavity, with the intermediate support plate set inside the cavity.

[0013] As an optional implementation, the front and rear ends of the intermediate support plate are connected to the front support plate and the rear support plate respectively, and the cross section of the rear support plate is in the form of a circular arc structure protruding towards the front support plate.

[0014] As an optional implementation, the front end of the side plate protrudes from the top plate, the bottom plate and the front support plate to form a first welding part for welding with the excavator boom.

[0015] As an optional implementation, the height of the front end of the side plate is less than the distance between the top plate and the bottom plate to form a second welding part in the form of a step between the side plate, the top plate and the bottom plate, and the second welding part is used for welding with the excavator boom.

[0016] As an optional implementation, the connection between each plate in the side plate, the top plate, the bottom plate, the front support plate, the rear support plate and the intermediate support plate has a round corner, and the radius of the round corner is greater than 20 mm.

[0017] As an optional implementation, a second process hole is formed in the side plate.

[0018] As an optional implementation, a third process hole is formed in the top plate.

[0019] As an optional implementation, a fourth process hole is formed in the bottom plate.

[0020] As an optional implementation, the bearing seat comprises a seat body, a hinged hole and a lubricating hole, the hinged hole is used for hinging with the slewing platform of the excavator, the lubricating hole has an included angle with the axial direction of the hinged hole, and the lubricating hole and the hinged hole are communicated.

[0021] In the second aspect, the utility model also provides a kind of excavator, including walking mechanism, slewing platform and working device, slewing platform is arranged in walking mechanism, working device is connected to slewing platform, and working device includes boom and the support device in the first aspect, the rear end of support device is hinged with slewing platform by bearing seat, and the front end of support device is connected with boom.

[0022] The utility model provides a utility model provides an excavator movable arm support device, through integrative casting, including two opposite bearing seat, two opposite side plate, top plate, bottom plate, front support plate, rear support plate and intermediate support plate, two bearing seat are located in the rear end of support device, are used for and excavator's rotary platform articulates, the rear end of two side plates is connected in different bearing seat respectively, top plate is connected in the top end of two side plates, and is connected with bearing seat, bottom plate is connected in the bottom end of two side plates, and is connected with bearing seat, front support plate sets up in the front end of support device, and the front end of side plate, the front end of top plate and the front end of bottom plate all are connected, and the first process hole is seted up on front support plate, wherein, the front end of side plate, the front end of top plate and the front end of bottom plate are configured as and excavator's movable arm connects, rear support plate is connected in the rear end of bottom plate and the rear end of top plate, and is connected with bearing seat, side plate, top plate, bottom plate, front support plate and rear support plate are collectively enclosed into forming cavity, and intermediate support plate sets up in the cavity.

[0023] The two bearing seats in the excavator movable arm support device are arranged at the rear end of the support device, which is hinged with the rotary platform of the excavator to ensure flexible rotation of the device during operation. The rear ends of the two side plates are connected with the corresponding bearing seats, providing basic support for the overall structure. The top plate connects the top ends of the two side plates and is connected with the bearing seats, which can enhance the compression resistance of the upper part of the device. The bottom plate connects the bottom ends of the two side plates and the bearing seats, which can ensure the stability of the bottom. The front support plate is connected with the front ends of the side plate, the top plate, and the bottom plate, and has a first process hole. During the processing link, this process hole facilitates workers to use tools to operate the inside, improving the processing accuracy. During subsequent maintenance, it is convenient for technicians to observe the internal conditions and timely discover potential problems, improving product quality. At the same time, the front ends of the side plate, the top plate, and the bottom plate are designed to be connected with the movable arm of the excavator, which can make the force transmission between the movable arm and the support device more smooth, improving the cooperation of the excavation operation. The rear support plate connects the rear ends of the bottom plate and the top plate and is connected with the bearing seats, which strengthens the stability of the rear end of the device. The side plate, the top plate, the bottom plate, the front support plate, and the rear support plate collectively enclose a forming cavity, and the intermediate support plate is arranged therein, which significantly improves the internal structural strength of the device and makes it capable of bearing large loads in multiple directions. In summary, compared with the traditional welded movable arm rear support structure, the excavator movable arm support device provided by the utility model adopts integrative casting, which improves the structural strength of the support device, eliminates the cumbersome welding process, shortens the production cycle, reduces the production cost, and improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0025] Figure 1 The first overall structure schematic diagram of the excavator movable arm supporting device provided by the embodiment of the present application is shown in the figure.

[0026] Figure 2 The second overall structure schematic diagram of the excavator movable arm supporting device provided by the embodiment of the present application is shown in the figure.

[0027] Figure 3 The first overall structure schematic diagram of the excavator movable arm supporting device provided by the embodiment of the present application is shown in the figure. Figure 2 The enlarged view of A in the figure.

[0028] Figure 4 The first overall structure schematic diagram of the excavator movable arm supporting device provided by the embodiment of the present application is shown in the figure. Figure 1 The cross-sectional view of the figure.

[0029] Figure 5 The connection schematic diagram of the excavator movable arm supporting device and the excavator movable arm provided by the embodiment of the present application is shown in the figure.

[0030] Figure 6 The third overall structure schematic diagram of the excavator movable arm supporting device provided by the embodiment of the present application is shown in the figure.

[0031] Figure 7 The fourth overall structure schematic diagram of the excavator movable arm supporting device provided by the embodiment of the present application is shown in the figure.

[0032] Explanation of the reference signs:

[0033] 100 - supporting device;

[0034] 110 - bearing seat;

[0035] 111 - seat body;

[0036] 112 - hinged hole;

[0037] 113 - lubricating hole;

[0038] 120 - side plate;

[0039] 121 - first welding part;

[0040] 122 - second welding part;

[0041] 123 - second process hole;

[0042] 130 - top plate;

[0043] 131 - third process hole;

[0044] 140 - base plate;

[0045] 141 - fourth process hole;

[0046] 150 - front support plate;

[0047] 151 - first process hole;

[0048] 160 - rear support plate;

[0049] 170 - intermediate support plate;

[0050] 180 - rounded corner;

[0051] 200 - boom. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0053] In the application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0054] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific circumstances.

[0055] In addition, the terms "mount", "set", "provided with", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. Those of ordinary skill in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific circumstances.

[0056] Furthermore, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific type and structure may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "a plurality" is two or more.

[0057] The hydraulic excavator is mainly composed of a walking device, a rotating platform, a working device and the like. The working device generally includes a boom, a stick, a bucket and a driving mechanism. The front end of the boom is connected with the bucket, and the rear end of the boom is rotationally connected with the rotating platform through a support seat. Under the driving force of the driving mechanism, the boom can rotate around the rotating platform, thereby performing work through the bucket. Therefore, the support seat connecting the boom and the platform needs to bear a huge load during the operation of the excavator, which has a high requirement on the structural strength of the support seat. However, the related art support seat has the problems of complex machining process, insufficient structural strength and easy cracking of the weld.

[0058] Therefore, the utility model provides a excavator boom support device, through integral casting forming, including two opposite bearing seat, two opposite side plate, top plate, bottom plate, front support plate, rear support plate and intermediate support plate, two bearing seat set up in the rear end of support device, its function is with excavator's rotating platform carries out the hinge, guarantees device to be able to rotate flexibly when operating. Two side plate rear end is connected with corresponding bearing seat respectively, and provides basic support for the overall structure; the top plate connects the top end of the two side plates and is connected with the bearing seat, which can enhance the compression resistance of the upper part of the device; the bottom plate connects the bottom end of the two side plates and the bearing seat, which can ensure the stability of the bottom. The front end of the side plate, the top plate and the bottom plate is connected with the front end of the side plate, the top plate and the bottom plate, and a first process hole is formed. In the processing link, this process hole facilitates workers to operate the inside with tools, improves the processing accuracy; in subsequent maintenance, it is convenient for technical personnel to observe the internal condition and timely find potential problems, improve product quality. At the same time, the front end of the side plate, the top plate and the bottom plate is designed to be connected with the excavator boom, which can make the force transmission between the boom and the support device more smooth, and improve the cooperation of the excavating operation. The rear end of the bottom plate and the rear end of the top plate are connected with the bearing seat, which strengthens the stability of the rear end of the device. The side plate, the top plate, the bottom plate, the front support plate and the rear support plate jointly enclose a cavity, and the intermediate support plate is arranged in the cavity, which significantly improves the structural strength of the device, so that it can bear larger loads in multiple directions. Compared with the traditional welded boom rear support structure, the excavator boom support device provided by the utility model is formed by integral casting, which improves the structural strength of the support device, eliminates the cumbersome welding process, shortens the production cycle, reduces the production cost and improves the production efficiency.

[0059] Figure 1The first overall structure schematic diagram of the excavator movable arm supporting device is provided for the utility model embodiment; Figure 2 The second overall structure schematic diagram of the excavator movable arm supporting device is provided for the utility model embodiment; Figure 3 The Figure 2 The enlarged view of A in the middle; Figure 4 The Figure 1 The sectional view; Figure 5 The connection schematic diagram of the excavator movable arm supporting device and the excavator movable arm is provided for the utility model embodiment; Figure 6 The third overall structure schematic diagram of the excavator movable arm supporting device is provided for the utility model embodiment; Figure 7 The fourth overall structure schematic diagram of the excavator movable arm supporting device is provided for the utility model embodiment.

[0060] Reference can be made to Figures 1 to 7 The utility model embodiment provides a kind of excavator movable arm supporting device 100, by integrally casting forming, including two opposite bearings 110, two opposite side plates 120, top plate 130, bottom plate 140, front support plate 150, rear support plate 160 and intermediate support plate 170, two bearings 110 are located in the rear end of supporting device 100, for and excavator's rotary platform articulates;The rear end of two side plates 120 is connected to different bearings 110 respectively;Top plate 130 is connected to the top end of two side plates 120, and is connected with bearing 110;Bottom plate 140 is connected to the bottom end of two side plates 120, and is connected with bearing 110;Front support plate 150 is set in the front end of supporting device 100, and is connected with the front end of side plate 120, the front end of top plate 130 and the front end of bottom plate 140, first process hole 151 is opened in front support plate 150, wherein, the front end of side plate 120, the front end of top plate 130 and the front end of bottom plate 140 are configured to be connected with the movable arm 200 of excavator;Rear support plate 160 is connected to the rear end of bottom plate 140 and the rear end of top plate 130, and is connected with bearing 110;Side plate 120, top plate 130, bottom plate 140, front support plate 150 and rear support plate 160 are collectively enclosed into forming cavity, and intermediate support plate 170 is set in the cavity.

[0061] The two bearing seats 110 in the excavator movable arm supporting device 100 provided by the embodiment of the utility model are arranged at the rear end of the supporting device 100, and the function is to be hinged with the slewing platform of the excavator, so that the device can be flexibly rotated during operation. The rear ends of the two side plates 120 are connected with the corresponding bearing seats 110 respectively, and the foundation support is provided for the overall structure; the top plate 130 is connected with the top ends of the two side plates 120 and is connected with the bearing seat 110, so that the compression resistance of the upper part of the device can be enhanced; the bottom plate 140 is connected with the bottom ends of the two side plates 120 and the bearing seat 110, so that the stability of the bottom part can be ensured. The front support plate 150 is connected with the front ends of the side plate 120, the top plate 130 and the bottom plate 140, and the first process hole 151 is arranged in the front support plate 150. During the machining process, the process hole is convenient for workers to operate inside with tools, so that the machining accuracy is improved; during the subsequent maintenance, the internal condition can be observed by the technical personnel, potential problems can be found in time, and the product quality is improved. Meanwhile, the front ends of the side plate 120, the top plate 130 and the bottom plate 140 are designed to be connected with the movable arm 200 of the excavator, so that the force transmission between the movable arm 200 and the supporting device 100 is smoother, and the cooperation of the excavating operation is improved. The rear support plate 160 is connected with the rear end of the bottom plate 140 and the rear end of the top plate 130 and is connected with the bearing seat 110, so that the stability of the rear end of the device is strengthened. The side plate 120, the top plate 130, the bottom plate 140, the front support plate 150 and the rear support plate 160 jointly form a cavity, and the middle support plate 170 is arranged in the cavity, so that the internal structure strength of the device is improved, and the device can bear a large load in multiple directions. In summary, compared with the traditional welded movable arm 200 rear supporting structure, the excavator movable arm supporting device 100 provided by the embodiment of the utility model is integrally cast, the structure strength of the supporting device 100 is improved, the complicated welding process is avoided, the production cycle is shortened, the production cost is reduced, and the production efficiency is improved.

[0062] In the above embodiment, the front end and the rear end of the middle support plate 170 can be connected to the front support plate 150 and the rear support plate 160 respectively, and the cross section of the rear support plate 160 is in the form of a circular arc structure protruding towards the front support plate 150. This connection mode can make the internal support force distribution more balanced, and when the supporting device 100 bears the excavating load from the outside, whether it is the impact from the working device during operation or the vibration, pulling force and the like generated due to complex working conditions, the internal support structure under balanced stress can effectively disperse. The front support plate 150, the middle support plate 170 and the rear support plate 160 cooperate to improve the overall stability of the supporting device 100, and ensure stable and reliable operation of the device in long-term high-strength excavating operation.

[0063] The rear support plate 160 in the arc-shaped structure can achieve efficient pressure dispersion. Compared with the traditional straight-line or angular cross-section design, when external load is applied to the rear support plate 160, the pressure will naturally and uniformly spread to all directions along the curve of the arc. For example, in the excavation operation, the boom 200 is frequently extended and retracted, and the generated force is transmitted to the rear support plate 160. The arc surface can smoothly guide these forces to the surrounding connecting components, avoid excessive stress concentration in the local area, make the force of each part of the entire support device 100 more balanced, and greatly reduce the risk of component damage caused by local overload. Secondly, this arc-shaped design effectively reduces the stress concentration point. Sharp corners are prone to become "high-risk areas" of stress concentration when stressed, causing cracks and even structural failure problems such as rupture. The arc structure does not have such sharp corners, which eliminates the risk of stress concentration from the mechanical principle, ensuring that the rear support plate 160 itself and the top plate 130, the bottom plate 140, the side plate 120 and other components connected thereto remain structurally intact under long-term complex stress working conditions, providing a solid guarantee for the high-strength operation of the entire support device 100. Furthermore, from the aspect of overall structural stability, the arc-shaped rear support plate 160 is more smooth in connection with other components. In the assembly process, it can better fit the top plate 130 and the bottom plate 140 to form a tight and continuous force transmission path, reducing the force loss or stress mutation caused by small gaps, misalignments and other factors at the connection site, making the internal structure of the entire support device 100 more coordinated, and further improving the ability to cope with high-strength excavation operations, ensuring the long-term stable and reliable operation of the device.

[0064] In the above embodiment, the front end of the side plate 120 can protrude from the top plate 130, the bottom plate 140 and the front support plate 150 by a portion to form a first welding portion 121 welded with the excavator boom 200. The front end of the side plate 120 protrudes from the top plate 130, the bottom plate 140 and the front support plate 150 by a portion, which can increase the welding contact area. When welded with the excavator boom 200, the protruding portion provides more space for welding operation, so that the length of the weld is increased and the welding points are more widely distributed. Compared with the butt welding method, the large-area welding connection can significantly enhance the bonding force between the boom 200 and the side plate 120. During the excavation operation, the boom 200 bears a large external force such as excavation and lifting, and the large-area and firm first welding portion 121 can effectively disperse the transmitted load and prevent loosening and cracking due to insufficient bonding force of the welding portion, thereby ensuring the stability of the structure of the entire support device 100. On the other hand, the unique design of the protruding portion makes the welding force more uniform. Since the direction and size of the force of the boom 200 during operation are variable, if the welding portion is cramped and the force is uneven, a high stress area is easily formed in the local part, which causes the weld to fatigue and fail. The first welding portion 121 can guide the force to be transmitted to the main body of the side plate 120 and the surrounding components along the protruding portion more gently due to the protruding design of the front end of the side plate 120, which avoids stress concentration in a certain point. For example, when the boom 200 is subjected to a lateral tensile force, the force can be uniformly dispersed to various parts of the side plate 120 through the long weld, and then the top plate 130, the bottom plate 140 and other components bear the load together, so that the entire support device 100 is still firm and reliable under complex stress working conditions and maintains high strength operation capability.

[0065] In the above embodiment, the height of the front end of the side plate 120 can be less than the distance between the top plate 130 and the bottom plate 140 to form a stepped second welding portion 122 between the side plate 120, the top plate 130 and the bottom plate 140, and the second welding portion 122 is welded with the excavator boom 200. The stepped second welding portion 122 can increase the welding surface between the excavator boom 200 and the support device 100 and improve the fit between the two, so that the support device 100 and the boom 200 are connected more firmly.

[0066] In the above embodiment, the connecting portions between the side plate 120, the top plate 130, the bottom plate 140, the front support plate 150, the rear support plate 160 and the middle support plate 170 can have a fillet 180 with a radius greater than 20 mm. It can be understood that when the mechanical structure is under stress, sharp corners will cause stress concentration and sudden force transmission. The fillet 180 can smoothly transition the stress and uniformly distribute it in the connecting area. When the force of the excavator boom 200 working is transmitted to the connecting portion of the plate, the fillet 180 guides the stress dispersion, avoids local stress from being too high to cause cracks, enhances the connection strength, and improves the stability of the device. Secondly, long-term excavating operation will make the support device 100 bear alternating load, and sharp corners are easy to become the starting point of fatigue cracks, which will cause component failure with crack propagation. The fillet 180 can reduce the stress concentration coefficient, better bear the alternating load, delay the generation and propagation of cracks, improve the fatigue life of the connecting portion, and ensure the long-term reliable operation of the support device 100. In addition, the connecting portion of the plate is the key of force transmission, and its strength affects the collaborative working ability of the device. The fillet 180 design can make the connection natural and tight, avoid uneven metal flow defects during manufacturing, ensure consistent material performance, ensure smooth force transmission during stress, maintain the force transmission path, make the device collaboratively bear stress as a whole, improve the structural strength, and adapt to complex working conditions. Finally, the fillet 180 design can also facilitate the removal of the casting during casting. The radius of the fillet 180 is too small, which will cause difficulty in demolding later.

[0067] In the above embodiment, the second process hole 123 can be formed in the side plate 120. It can be understood that the support device 100 has a large volume and the cavity inside is relatively deep, so the production personnel cannot fully reach the inside of the cavity. By opening the second process hole 123, the sand mold can be compacted during casting, ensuring the compactness of the sand mold in the deep cavity and improving the quality of the support device 100. Moreover, the second process hole 123 also facilitates further sand cleaning inside the cavity, ensuring the cleanliness of the cavity and avoiding damage to the casting body.

[0068] In the above embodiment, a third process hole 131 can also be formed in the top plate 130. The third process hole 131 can improve the support and reinforcement of the casting, avoid movement of the main core of the casting during hoisting and pouring, and thus affect the quality of the casting.

[0069] In the above embodiment, a fourth process hole 141 can also be formed in the bottom plate 140. The fourth process hole 141 can assist in exhaust to reduce defects such as pores in the casting.

[0070] In the above embodiment, the bearing seat 110 can include a seat body 111, a hinging hole 112 for hinging with the slewing platform of the excavator, and a lubricating hole 113 having an included angle with the axial direction of the hinging hole 112 and communicating with the hinging hole 112. The intersection holes of the two bearing seats 110 can be opposite in the axial direction, and a pin shaft can pass through the hinging holes 112 of the two bearing seats 110 to hinge with the slewing platform. The lubricating hole 113 can facilitate the addition of lubricant to the hinging hole 112, lubricate the bearing seat 110, and improve the service life thereof.

[0071] In a second aspect, the utility model also provides an excavator, including walking mechanism, slewing platform and work device, slewing platform sets up in walking mechanism, work device is connected to slewing platform, and work device includes movable arm 200 and the support device 100 in the above embodiment, and the rear end of support device 100 is hinged with slewing platform through bearing seat 110, and the front end of support device 100 is connected with movable arm 200. The support device 100 includes two opposite bearing seats 110, two opposite side plates 120, a top plate 130, a bottom plate 140, a front support plate 150, a rear support plate 160 and an intermediate support plate 170. The two bearing seats 110 are located at the rear end of the support device 100 and are used for hinging with the slewing platform of the excavator. The rear ends of the two side plates 120 are respectively connected to different bearing seats 110. The top plate 130 is connected to the top ends of the two side plates 120 and is connected to the bearing seats 110. The bottom plate 140 is connected to the bottom ends of the two side plates 120 and is connected to the bearing seats 110. The front support plate 150 is arranged at the front end of the support device 100 and is connected to the front ends of the side plates 120, the front end of the top plate 130 and the front end of the bottom plate 140. The first process hole 151 is formed in the front support plate 150. The side plates 120, the top plate 130, the bottom plate 140, the front support plate 150 and the rear support plate 160 jointly form a molding cavity, and the intermediate support plate 170 is arranged in the molding cavity. The support device 100 is integrally cast, which improves the structural strength of the support device 100, eliminates the complicated welding process, shortens the production cycle, reduces the production cost, improves the load and reliability of the excavator.

[0072] Finally, it should be noted that the above embodiments are used to illustrate the technical solutions of the utility model, but not to limit them. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for some or all of the technical features. Such modifications or replacements do not change the essence of the corresponding technical solutions out of the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An excavator boom support apparatus, characterized by, The support device is formed by one-piece casting, comprising: two opposite bearing seats arranged at the rear end of the support device and used for being hinged to the slewing platform of the excavator; two opposite side plates, the rear ends of the two side plates being connected to different bearing seats respectively; a top plate connected to the top ends of the two side plates and connected to the bearing seats; a bottom plate connected to the bottom ends of the two side plates and connected to the bearing seats; a front support plate arranged at the front end of the support device and connected to the front ends of the side plates, the front end of the top plate and the front end of the bottom plate, the front support plate being provided with a first process hole, wherein the front ends of the side plates, the front end of the top plate and the front end of the bottom plate are configured to be connected to the movable arm of the excavator; a rear support plate connected to the rear ends of the bottom plate and the top plate and connected to the bearing seats; an intermediate support plate, the side plates, the top plate, the bottom plate, the front support plate and the rear support plate collectively forming a molding cavity, the intermediate support plate being arranged in the molding cavity.

2. The excavator boom support apparatus of claim 1, wherein, The front and rear ends of the intermediate support plate are connected to the front support plate and the rear support plate respectively, and the cross section of the rear support plate is in the form of a circular arc structure protruding towards the front support plate.

3. The excavator boom support apparatus of claim 2, wherein, The front ends of the side plates protrude from the top plate, the bottom plate and the front support plate by a portion to form a first welding part to be welded to the movable arm of the excavator.

4. The excavator boom support apparatus of claim 3, wherein, The height of the front end of the side plate is less than the distance between the top plate and the bottom plate to form a stepped second welding part between the side plates, the top plate and the bottom plate, the second welding part being used for welding to the movable arm of the excavator.

5. The excavator boom support apparatus of claim 4, wherein, The connection between each plate among the side plates, the top plate, the bottom plate, the front support plate, the rear support plate and the intermediate support plate has a round corner, and the radius of the round corner is greater than 20 mm.

6. The excavator boom support apparatus according to any one of claims 1 to 5, characterized by The side plate is provided with a second process hole.

7. The excavator boom support apparatus of any one of claims 1-5, wherein, The top plate is provided with a third process hole.

8. The excavator boom support apparatus of any one of claims 1-5, wherein, The bottom plate is provided with a fourth process hole.

9. The excavator boom support apparatus of any one of claims 1-5, wherein, The bearing seat comprises a seat body, a hinge hole and a lubricating hole, the hinge hole being used for being hinged to the slewing platform of the excavator, the lubricating hole having an included angle with the axial direction of the hinge hole, and the lubricating hole being communicated with the hinge hole.

10. An excavator characterized by comprising: The excavator comprises a traveling mechanism, a slewing platform and a working device, the slewing platform being arranged on the traveling mechanism, the working device being connected to the slewing platform, the working device comprising a movable arm and the support device according to any one of claims 1-9, the rear end of the support device being hinged to the slewing platform through the bearing seat, and the front end of the support device being connected to the movable arm.

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