Big arm side-sway control mechanism of excavator and excavator

Abstract

The utility model provides a big arm side-sway control mechanism of an excavator and the excavator, the big arm side-sway control mechanism comprises: a telescopic driving component arranged on a main frame; the side-sway steering head is connected with the output end of the telescopic driving component, the side-sway steering head is used for being arranged at the front end of the main frame, the side-sway steering head is rotationally connected with the main frame, and the side-sway steering head can swing in the horizontal plane under the telescopic driving effect of the telescopic driving component; and the side-sway positioning part is arranged between the side-sway steering head and the main frame, and the side-sway positioning part is used for positioning the side-sway steering head. The large arm side-sway control mechanism ensures the stability of the large arm.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy machinery, in particular to a boom side swing control mechanism of an excavator and the excavator. Background Art

[0002] In this mechanized era, the majority of users are gradually adopting mechanized production instead of manpower, which can greatly reduce the labor burden of construction workers. The mini excavator is compact and suitable for a variety of occasions such as indoors, orchards, and construction projects. Construction workers can achieve different working methods by replacing different attachments, and can perform rotary digging, crushing, wood grabbing and other operations. When the mini excavator is working in a narrow space or working very close to the wall, it is impossible to fully unload and load the soil by rotating the operating table alone. Therefore, some mini excavators have their arms set to a structure with a side swing function.

[0003] In order to realize the side swing of the boom, the existing mini excavator is generally driven by a hydraulic cylinder, that is, the steering head is driven to swing left and right by the extension and contraction of the side swing hydraulic cylinder, and the left and right swing of the steering head drives the left and right swing of the boom and other working devices, thereby realizing the side swing function of the mini excavator. Although the existing mini excavator can realize the side swing of the boom, when the boom of the mini excavator does not need to swing left and right, the boom will be unstable due to the leakage of hydraulic oil in the hydraulic system, affecting the working efficiency of the mini excavator. Therefore, how to improve the stability of the boom is a technical problem that needs to be solved urgently. Utility Model Content

[0004] In view of this, the utility model provides a boom side swing control mechanism of an excavator and an excavator to solve one or more technical problems existing in the prior art.

[0005] According to one aspect of the utility model, the utility model provides a boom side swing control mechanism for an excavator, the boom side swing control mechanism comprising:

[0006] A telescopic driving component, used for being arranged on the main frame;

[0007] A side-swing steering head connected to the output end of the telescopic driving component, the side-swing steering head is used to be arranged at the front end of the main frame, and the side-swing steering head is rotatably connected to the main frame, and the side-swing steering head can swing in a horizontal plane under the telescopic driving action of the telescopic driving component;

[0008] A side-swing positioning component is arranged between the side-swing steering head and the main frame, and the side-swing positioning component is used to position the side-swing steering head.

[0009] In some embodiments of the present utility model, the boom side-swing control mechanism includes a connecting shaft, and the connecting shaft is located between the side-swing steering head and the output end of the telescopic drive component.

[0010] In some embodiments of the present invention, the telescopic driving component is a hydraulic cylinder, and the connecting shaft is located between the side-swing steering head and the end of the cylinder rod of the hydraulic cylinder.

[0011] In some embodiments of the present invention, the connecting shaft is fixedly connected to the side-swing steering head, and the connecting shaft and the end of the cylinder rod of the hydraulic cylinder can rotate relative to each other.

[0012] In some embodiments of the present utility model, the side-swing positioning component is a limit bracket, and both ends of the limit bracket are respectively connected to the main frame and the connecting shaft.

[0013] In some embodiments of the utility model, a first positioning hole and a second positioning hole are respectively provided at both ends of the limiting bracket, the first positioning hole is sleeved on the connecting shaft, a positioning boss is provided on the main frame, and the second positioning hole is sleeved on the positioning boss.

[0014] In some embodiments of the present invention, a third positioning hole is provided in the middle of the limiting bracket.

[0015] In some embodiments of the utility model, the cylinder end of the hydraulic cylinder is rotationally connected to the main frame via a first rotating shaft, and the side-swing steering head is rotationally connected to the front end of the main frame via a second rotating shaft.

[0016] In some embodiments of the present invention, the first rotating shaft and / or the second rotating shaft is arranged parallel to the connecting shaft.

[0017] According to another aspect of the utility model, an excavator is also disclosed, and the excavator includes the boom side-swing control mechanism of the excavator as described in any of the above embodiments.

[0018] In the boom side-swing control mechanism of the excavator in the above-mentioned embodiment, the side-swing steering head is driven by the telescopic driving component, and the side-swing steering head is positioned by the side-swing positioning component after the boom is side-swung into place, thereby preventing the side-swing steering head from shaking due to the instability of the telescopic driving component, thereby improving the stability of the boom in a fixed state and improving the working efficiency of the excavator.

[0019] Additional advantages, purposes, and features of the present invention will be partially described in the following description, and will become partially apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written description and its claims and the drawings.

[0020] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to the above specific description, and the above and other purposes that can be achieved by the present invention will be more clearly understood based on the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for the purpose of illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of a first state of a boom side swing control mechanism according to an embodiment of the utility model.

[0023] Figure 2 This is a schematic diagram of the second state of the boom side swing control mechanism of one embodiment of the utility model.

[0024] Figure 3 It is a structural schematic diagram of a main frame of an embodiment of the utility model.

[0025] Figure 4 The figure is a schematic structural diagram of a positioning boss on a main frame according to an embodiment of the utility model.

[0026] Figure 5 It is a schematic structural diagram of a second rotating shaft according to an embodiment of the utility model.

[0027] Figure 6 The figure is a schematic structural diagram of a hydraulic cylinder according to an embodiment of the utility model.

[0028] Figure 7 It is a schematic structural diagram of a first rotating shaft according to an embodiment of the utility model.

[0029] Figure 8 It is a structural schematic diagram of a connecting shaft according to an embodiment of the utility model.

[0030] Fig. 9 It is a schematic structural diagram of a limiting bracket according to an embodiment of the utility model.

[0031] Reference numerals:

[0032] Main frame 100 Telescopic driving component 200 Side swing steering head 300 Limiting bracket 400 Connecting shaft 510 First rotating shaft 520 Second rotating shaft 530 First positioning hole 410 Second positioning hole 420 Third positioning hole 430 Positioning boss 110 DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0034] It should be noted here that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the scheme according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0035] It should be emphasized that the terms “include / comprises / has” when used herein refer to the presence of features, elements, steps or components, but do not exclude the presence or addition of one or more other features, elements, steps or components.

[0036] It should also be noted that the directional terms such as "left end" and "right end" in this specification are relative to the position directions shown in the drawings; if there is no special explanation, the term "connection" in this article can refer to not only direct connection, but also indirect connection with an intermediate. Direct connection means that two parts are connected without the help of an intermediate part, and indirect connection means that two parts are connected with the help of other parts.

[0037] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components.

[0038] Figure 1 This is a schematic diagram of a first state of a boom side swing control mechanism according to an embodiment of the utility model. Figure 2 FIG. 2 is a schematic diagram of a second state of a side swing control mechanism of a large arm according to an embodiment of the utility model. Figure 1 and Figure 2As shown, the boom side swing control mechanism includes a telescopic driving component 200, a side swing steering head 300 and a side swing positioning component. The telescopic driving component 200 is used to be arranged on the main frame 100, and the telescopic driving component 200 is used to drive the side swing steering head 300 to swing. The side swing steering head 300 is connected to the output end of the telescopic driving component 200, and the side swing steering head 300 is used to be arranged at the front end of the main frame 100, and the side swing steering head 300 is rotatably connected to the main frame 100, and the side swing steering head 300 can swing in the horizontal plane under the telescopic driving action of the telescopic driving component 200. The side swing positioning component is arranged between the side swing steering head 300 and the main frame 100, and the side swing positioning component is used to position the side swing steering head 300.

[0039] In this embodiment, the boom of the excavator is used to connect with the side-swing steering head 300, so that under the telescopic driving action of the telescopic driving component 200, the boom can swing synchronously with the side-swing steering head 300. In addition, since the side-swing steering head 300 is not only connected to the output end of the telescopic driving component 200, but also rotatably connected to the front end of the main frame 100, the side-swing steering head 300 swings around the hinge axis between the side-swing steering head 300 and the main frame 100 under the telescopic driving action of the telescopic driving component 200. Exemplarily, when the output end of the telescopic driving component 200 is in a retracted state, the boom of the excavator is swung to the right side of the cab, when the output end of the telescopic driving component 200 is half extended, the boom of the excavator is in front of the cab, and when the output end of the telescopic driving component 200 is fully extended, the boom of the excavator is at the left side of the cab; it can be understood that the limitation of the boom position in this embodiment is only an implementation method, and does not constitute a specific limitation of the boom side-swing control mechanism of the present application.

[0040] Exemplarily, the telescopic driving component 200 may be a hydraulic cylinder, in which case the output end of the telescopic driving component 200 specifically refers to the cylinder rod of the hydraulic cylinder; it is understandable that the telescopic driving component 200, in addition to being a hydraulic cylinder, may also be other components that can drive the side-swing steering head to swing in a horizontal plane.

[0041] Furthermore, when the boom is swung into place or the excavator is in a state such as transportation where the boom needs to be kept stationary, in order to ensure the stability of the boom and prevent the side-swing steering head 300 from loosening, the present application positions the side-swing steering head 300 through a side-swing positioning component.

[0042] In a specific embodiment, the boom side swing control mechanism includes a connecting shaft 510, and the connecting shaft 510 is located between the side swing steering head 300 and the output end of the telescopic driving component 200. In this embodiment, the side swing steering head 300 and the output end of the telescopic driving component 200 are connected through the connecting shaft 510. When the telescopic driving component 200 is a hydraulic cylinder, the output end of the telescopic driving component 200 refers to the cylinder rod end of the hydraulic cylinder, and the side swing steering head 300 and the cylinder rod end of the hydraulic cylinder are connected through the connecting shaft 510.

[0043] like Figure 6 As shown, the cylinder end of the hydraulic cylinder is provided with a first connection portion for rotationally connecting with the main frame 100, and the right end of the cylinder rod is provided with a second connection portion for connecting with the connecting shaft 510. In the above embodiment, it is necessary to make the side-swing steering head 300 swing around the hinge axis between the side-swing steering head 300 and the main frame 100 within a certain angle range as the cylinder rod is extended and retracted. At this time, the side-swing steering head 300 can be fixedly connected to the connecting shaft 510, and then the end of the cylinder rod of the hydraulic cylinder and the connecting shaft 510 are set as a relatively rotatable structure; or the side-swing steering head 300 and the connecting shaft 510 can be set as a relatively rotatable structure, and the end of the cylinder rod of the hydraulic cylinder and the connecting shaft 510 can be set as a fixedly connected structure.

[0044] Figure 8 FIG. 5 is a schematic diagram of the structure of a connecting shaft 510 according to an embodiment of the present invention. Figure 8 As described above, a connecting plate is provided on the connecting shaft 510, and a through hole is provided on the connecting plate. In order to realize the fixed connection between the connecting shaft 510 and the side-swing steering head 300, the connecting plate is directly connected to the side-swing steering head 300 by screws or bolts.

[0045] In order to realize the rotation connection between the hydraulic cylinder and the main frame 100, the cylinder end of the hydraulic cylinder is connected to the main frame 100 through the first rotating shaft 520; similarly, in order to realize the rotation connection between the side-swing steering head 300 and the main frame 100, the side-swing steering head 300 is connected to the front end of the main frame 100 through the second rotating shaft 530. Figure 1 As shown, in order to make the side-swing steering head 300 swing in the horizontal plane, the second rotating shaft 530 is set to a structure perpendicular to the horizontal plane. At this time, it can also be understood that the second rotating shaft 530 is perpendicular to the bottom plane of the main frame 100; further, the first rotating shaft 520 and / or the second rotating shaft 530 are also arranged parallel to the connecting shaft 510; when the first rotating shaft 520 and the second rotating shaft 530 are both parallel to the connecting shaft 510, the first rotating shaft 520 and the second rotating shaft 530 are both perpendicular to the horizontal plane.

[0046] Figure 7FIG. 5 is a schematic diagram of the structure of the first rotating shaft 520 according to an embodiment of the present invention. Figure 7 As shown, the bottom end of the first rotating shaft 520 is also provided with a connecting plate, which is used to achieve a fixed connection between the first rotating shaft 520 and the hydraulic cylinder body. Correspondingly, the main frame 100 may also be provided with a mounting hole for mounting the first rotating shaft 520 (refer to Figure 3 ). Figure 5 FIG. 5 is a schematic diagram of the structure of the second rotating shaft 530 according to an embodiment of the present invention. Figure 5 As shown, a connecting plate is also provided at the top end of the second rotating shaft 530, and the connecting plate is used to realize the fixed connection between the second rotating shaft 530 and the side-swing steering head 300. Accordingly, the front end of the main frame 100 may also be provided with a mounting hole for mounting the second rotating shaft 530. In the above embodiment, the cylinder body of the hydraulic cylinder can rotate relative to the main frame 100 based on the first rotating shaft 520, and the side-swing steering head 300 can rotate relative to the main frame 100 based on the second rotating shaft 530.

[0047] In some embodiments of the present invention, the side-swing positioning component may be a limit bracket 400, and both ends of the limit bracket 400 are respectively connected to the main frame 100 and the connecting shaft 510. The limit bracket 400 is arranged between the main frame 100 and the side-swing steering head 300, and is used to prevent the side-swing steering head 300 from being unstable due to the leakage of hydraulic oil in the hydraulic cylinder, so as to improve the stability of the boom of the excavator in the transportation state.

[0048] In order to realize the connection between the limiting bracket 400 and the main frame 100 and the connecting shaft 510, the two ends of the limiting bracket 400 can be respectively provided with a first positioning hole 410 and a second positioning hole 420, the first positioning hole 410 is sleeved on the connecting shaft 510, the main frame 100 is provided with a positioning boss 110, and the second positioning hole 420 is sleeved on the positioning boss 110. Fig. 9 As shown, the limiting bracket 400 is in a strip shape as a whole, and a circular hole is provided at each end of the limiting bracket 400. Figure 1 and Figure 2 The circular hole at the right end of the limiting bracket 400 is used to be sleeved on the top end of the connecting shaft 510, and the circular hole at the left end of the limiting bracket 400 is used to be sleeved on the positioning boss 110 on the main frame 100. The structural schematic diagram of the positioning boss 110 is shown in FIG. Figure 4 As shown, the positioning boss 110 and the main frame 100 can be an integral structure.

[0049] In addition, when the boom is located in front of the excavator cab, in order to improve the stability of the boom and the side-swing steering head 300, the side-swing steering head can be further positioned by the limit bracket. Exemplarily, the middle part of the limit bracket 400 is also provided with a third positioning hole 430, and at this time, the third positioning hole 430 of the limit bracket 400 replaces its first positioning hole 410 and is sleeved on the connecting shaft 510. In addition, in order to further improve the connection stability between the limit bracket 400 and the main frame 100 and the connecting shaft 510, after the positioning holes at both ends of the limit bracket 400 are sleeved on the connecting shaft 510 and the positioning boss 110, positioning pins can be further provided on the connecting shaft 510 and the positioning boss 110 to prevent the limit bracket 400 from loosening from the connecting shaft 510 and the positioning boss 110 due to shaking or the like.

[0050] Correspondingly, the utility model also discloses an excavator, which includes the boom side-swing control mechanism of the excavator as described in any of the above embodiments.

[0051] The boom side-swing control mechanism of the excavator in the above-mentioned embodiment, when the side-swing steering head needs to swing, removes the limit bracket between the main frame and the side-swing steering head, and the side-swing steering head can swing with the extension and retraction of the cylinder rod of the hydraulic cylinder; and when the side-swing steering head is swung into place, the circular hole at one end of the limit bracket can be sleeved on the connecting shaft between the side-swing steering head and the end of the cylinder rod, and the circular hole at the other end of the limit bracket can be sleeved on the positioning boss of the main frame. At this time, the side-swing steering head is fixed relative to the main frame by the limit bracket, thereby realizing the positioning of the side-swing steering head. Even if the hydraulic oil in the hydraulic cylinder leaks, since the boom side-swing control mechanism of the present application forms a triangular positioning structure based on the limit bracket, the stability of the side-swing steering head is ensured, thereby improving the working stability of the excavator.

[0052] It can also be found from the above embodiments that the boom side swing control mechanism disclosed in the present application has a simple structure, is easy to manufacture, easy to install, and has a low cost, which not only improves the boom stability of the excavator, but also improves work efficiency.

[0053] In the present invention, features described and / or illustrated for one embodiment may be used in the same manner or in a similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0054] The above-listed embodiments show and describe the basic principles and main features of the utility model, but the utility model is not limited to the above-mentioned embodiments. Any modifications, equivalent changes and modifications made to the utility model by those skilled in the art without making any creative work should fall within the scope of protection of the technical solution of the utility model.

Claims

1. A boom side swing control mechanism for an excavator, characterized in that: The boom side swing control mechanism comprises: A telescopic driving component, used for being arranged on the main frame; A side-swing steering head connected to the output end of the telescopic driving component, the side-swing steering head is used to be arranged at the front end of the main frame, and the side-swing steering head is rotatably connected to the main frame, and the side-swing steering head can swing in a horizontal plane under the telescopic driving action of the telescopic driving component; A side-swing positioning component is arranged between the side-swing steering head and the main frame, and the side-swing positioning component is used to position the side-swing steering head.

2. The boom side swing control mechanism of the excavator according to claim 1, characterized in that: The boom side-swing control mechanism comprises a connecting shaft, and the connecting shaft is located between the side-swing steering head and the output end of the telescopic driving component.

3. The boom side swing control mechanism of the excavator according to claim 2, characterized in that: The telescopic driving component is a hydraulic cylinder, and the connecting shaft is located between the side-swing steering head and the end of the cylinder rod of the hydraulic cylinder.

4. The boom side swing control mechanism of the excavator according to claim 3, characterized in that: The connecting shaft is fixedly connected to the side-swing steering head, and the connecting shaft and the end of the cylinder rod of the hydraulic cylinder can rotate relative to each other.

5. The boom side swing control mechanism of the excavator according to claim 4, characterized in that: The side-swing positioning component is a limit bracket, and both ends of the limit bracket are respectively connected to the main frame and the connecting shaft.

6. The boom side swing control mechanism of the excavator according to claim 5, characterized in that: The two ends of the limit bracket are respectively provided with a first positioning hole and a second positioning hole, the first positioning hole is sleeved on the connecting shaft, the main frame is provided with a positioning boss, and the second positioning hole is sleeved on the positioning boss.

7. The boom side swing control mechanism of the excavator according to claim 6, characterized in that: A third positioning hole is provided in the middle of the limiting bracket.

8. The boom side swing control mechanism of an excavator according to claim 3, characterized in that: The cylinder end of the hydraulic cylinder is rotationally connected to the main frame via a first rotating shaft, and the side-swing steering head is rotationally connected to the front end of the main frame via a second rotating shaft.

9. The boom side swing control mechanism of the excavator according to claim 8, characterized in that: The first rotating shaft and / or the second rotating shaft are arranged parallel to the connecting shaft.

10. An excavator, characterized in that: The excavator comprises the boom side-swing control mechanism of the excavator as claimed in any one of claims 1 to 9.

Images