Excavator wheel steering driving device and excavator

Abstract

The utility model provides an excavator wheel steering driving device and an excavator. The steering driving device comprises a supporting frame, a driving device and a driving device, the wheels are arranged at the ends of the supporting frame, and the wheels are hinged to the ends of the supporting frame; the first hydraulic cylinder comprises a first cylinder body and a first cylinder rod, and the first cylinder body is fixed on the supporting frame; the second hydraulic cylinder comprises a second cylinder body and a two-stage cylinder rod, the second cylinder body is fixed to the first cylinder rod, and the tail end of the two-stage cylinder rod is hinged to the wheels. The excavator wheel steering driving device can improve the in-situ steering stability of the wheel excavator.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy machinery, in particular to an excavator wheel steering drive device and an excavator. Background Art

[0002] Excavators are a primary type of construction machinery used for digging and loading earth and rock. They are characterized by high efficiency, high output, and a wide range of applications. Depending on the working conditions, they can utilize various working devices, such as front shovels, backhoes, shovels, and hydraulic hammers, to perform different tasks, meeting the needs of water conservancy and hydropower, metallurgy, mining, transportation, construction, petrochemicals, airports, and docks. Currently, the most commonly used excavators include crawler excavators and wheeled excavators. Wheeled excavators operate by using drive wheels to propel the machine forward. These drive wheels drive the wheels through a transmission system, while a suspension and shock absorber system ensure stability and smooth movement. Wheeled excavators are also equipped with braking systems for speed control and stopping. Furthermore, wheeled excavators offer high speeds, making them suitable for working in large areas, such as in the field. They can also be easily moved to new work sites when the excavation site needs to be relocated.

[0003] Currently, most wheeled excavators use front-wheel steering or rear-wheel steering. While these existing front-wheel steering and rear-wheel steering methods can achieve steering and straight-line travel, wheeled excavators often operate on rough roads, resulting in unstable steering during in-situ maneuvers. Therefore, improving the stability of wheeled excavators during in-situ maneuvers is a pressing technical issue. Utility Model Content

[0004] In view of this, the present invention provides an excavator wheel steering drive device and an excavator to solve one or more technical problems existing in the prior art.

[0005] According to one aspect of the present invention, the present invention provides an excavator wheel steering drive device, the steering drive device comprising:

[0006] Support frame;

[0007] A wheel is provided at an end of the support frame, and the wheel is hingedly connected to the end of the support frame;

[0008] A first hydraulic cylinder, comprising a first cylinder body and a first cylinder rod, wherein the first cylinder body is fixed on the support frame;

[0009] The second hydraulic cylinder includes a second cylinder body and a two-stage cylinder rod. The second cylinder body is fixed on the first cylinder rod. The end of the two-stage cylinder rod is hingedly connected to the wheel.

[0010] In some embodiments of the present invention, the steering drive device includes a wheel limiting cylinder, which includes a third cylinder body and a third cylinder rod. The third cylinder body is fixed on the support frame, and the third cylinder rod is used to limit the wheel when extended.

[0011] In some embodiments of the present invention, the steering drive device further includes a stopper, which is hingedly connected to the end of the third cylinder rod, and the stopper can swing in a horizontal plane along with the telescopic movement of the third cylinder rod.

[0012] In some embodiments of the present invention, the steering drive device also includes a wheel fork, the end of the wheel fork is connected to the end of the support frame, the two fork arms of the wheel fork are respectively located on the upper and lower sides of the wheel hub, and each fork arm is connected to the wheel hub through a first rotating shaft.

[0013] In some embodiments of the present invention, the support frame and the wheel fork are an integrated structure.

[0014] In some embodiments of the present invention, the end of the two-stage cylinder rod is located at the front side or the rear side of the wheel hub, and the end of the two-stage cylinder rod is connected to the wheel via a second rotating shaft.

[0015] In some embodiments of the present invention, wheels are provided at both ends of the support frame, and two first hydraulic cylinders and two second hydraulic cylinders are provided on the support frame in a left-right symmetrical manner.

[0016] In some embodiments of the present invention, the rotation drive device also includes a cylinder rod support seat and a connecting rod, the cylinder rod support seat is fixed on the support frame, and the two ends of the connecting rod are respectively hingedly connected to the cylinder rod support seat and the stop block.

[0017] In some embodiments of the present invention, the axis of the first rotating shaft and the axis of the second rotating shaft are both perpendicular to a horizontal plane.

[0018] According to another aspect of the present invention, an excavator is further disclosed, which includes the excavator wheel steering drive device as described in any of the above embodiments.

[0019] In the excavator wheel steering drive device and excavator disclosed in the above-mentioned embodiments of the present application, the second cylinder body of the second hydraulic cylinder is fixed to the first cylinder rod, and the wheel is hingedly connected to the end of the two-stage cylinder rod. The wheel is also hingedly connected to the end of the support frame. Therefore, based on the expansion and contraction of the first cylinder rod and the two-stage cylinder rod, the present application can drive the wheel to rotate along an axis perpendicular to the ground, thereby adjusting the wheel angle and allowing the wheel excavator to operate in a fixed-position steering state or a straight-ahead state. This steering drive device improves the stability of the wheel excavator's fixed-position steering.

[0020] Additional advantages, objects, and features of the present invention will be partially set forth in the following description and will partially become apparent to those skilled in the art upon study of the following or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0021] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to those specifically described above, 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

[0022] The drawings described herein are intended to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are merely for the purpose of illustrating the principles of the present invention. 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 be larger than other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0023] Figure 1 The figure is a schematic structural diagram of an excavator wheel steering drive device according to an embodiment of the present invention.

[0024] Figure 2 for Figure 1 A front view of the excavator wheel steering drive is shown.

[0025] Figure 3 This is a schematic diagram of the state of the wheel steering drive device of an excavator when turning in situ according to one embodiment of the present utility model.

[0026] Figure 4 for Figure 3 A front view of the wheel steering drive is shown.

[0027] Figure 5 This is a schematic diagram of the state of the wheel steering drive device of an excavator when it is moving sideways according to one embodiment of the present utility model.

[0028] Figure 6 for Figure 5 A front view of the wheel steering drive is shown.

[0029] Reference numerals:

[0030] Support frame 100 Wheel 110 First cylinder 121 First cylinder rod 122 Second cylinder 131 Two-stage cylinder rod 132 Third cylinder 141 Stopper 151 Fork arm 161 Cylinder rod support seat 171 Connecting rod 172 DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the present invention more clear, the embodiment of the present invention is further described in detail with reference to the accompanying drawings. Here, the exemplary embodiment of the present invention and its description are used to explain the present invention, but are not intended to limit the present invention.

[0032] 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.

[0033] It should be emphasized that the terms “include / comprises / has” when used herein refer to the existence of features, elements, steps or components, but do not exclude the existence or addition of one or more other features, elements, steps or components.

[0034] It should also be noted that directional terms such as "left end" and "right end" appearing in this specification are relative to the positions shown in the accompanying drawings. Unless otherwise specified, the term "connected" herein may refer not only to a direct connection but also to an indirect connection involving an intermediary. A direct connection refers to a connection between two components without the aid of an intermediate component, while an indirect connection refers to a connection between two components via another component.

[0035] 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.

[0036] Figure 1 This is a schematic structural diagram of an excavator wheel steering drive device according to an embodiment of the present invention. Figure 1As shown, the steering drive device includes at least a support frame 100, a wheel 110, a first hydraulic cylinder, and a second hydraulic cylinder. The support frame 100 is specifically a front or rear axle support of a wheeled excavator. The wheel 110 is mounted at the end of the support frame 100 and is hingedly connected to the end of the support frame 100. The first hydraulic cylinder includes a first cylinder body 121 and a first cylinder rod. The first cylinder body 121 is fixed to the support frame 100. The second hydraulic cylinder includes a second cylinder body 131 and a two-stage cylinder rod 132. The second cylinder body 131 is fixed to the first cylinder rod. The end of the two-stage cylinder rod 132 is hingedly connected to the wheel 110. Because the second cylinder body 131 of the second hydraulic cylinder is fixed to the first cylinder rod 122 of the first hydraulic cylinder, the second hydraulic cylinder and the first cylinder rod 122 move synchronously.

[0037] In this embodiment, the angle of the wheel 110 is regulated by the first hydraulic cylinder and the second hydraulic cylinder, so that the wheeled excavator can work in the longitudinal straight-moving, transverse straight-moving and in-situ steering working states. Figure 2 The wheel axle of the wheel 110 in the wheel steering drive device of the excavator shown is parallel to the support frame 100, that is, the end face of the wheel 110 is substantially perpendicular to the support frame 100, and the wheel excavator is working in a longitudinal straight state. Figure 3 The angle between the wheel axle 110 and the support frame 100 in the wheel steering drive device of the excavator shown is an acute angle or an obtuse angle, that is, the end face of the wheel 110 is tilted relative to the support frame 100, and the wheel excavator is working in the in-situ steering state. Figure 5 The wheel axle 110 in the excavator wheel steering drive device and the support frame 100 are perpendicular to each other. At this time, the end face of the wheel 110 is parallel to the support frame 100, and the wheeled excavator works in a horizontal straight state.

[0038] Specifically, the above three states of the wheel 110 are adjusted based on the first hydraulic cylinder and the second hydraulic cylinder; for example, when the first cylinder rod 122 is extended and the dual-stage cylinder rod 132 is retracted, the wheel 110 works in Figure 1 and Figure 2 When the first cylinder rod 122 extends and the first stage cylinder rod 132 of the double-stage cylinder rod extends, the wheel 110 works in Figure 3 and Figure 4 When the first cylinder rod 122 is extended and the two-stage cylinder rod 132 is extended, the wheel 110 works in Figure 5 and Figure 6 Status shown.

[0039] Furthermore, the steering drive device includes a wheel limiting oil cylinder, which includes a third cylinder body 141 and a third cylinder rod. The third cylinder body 141 is fixed to the support frame 100, and the third cylinder rod is used to limit the wheel 110 when it is extended. Figure 3 As shown, the third cylinder body 141 is parallel to the first cylinder body 121 and the second cylinder body 131. When the wheel excavator is working in the in-situ steering state, the third cylinder rod of the wheel limiting cylinder is extended. At this time, the end of the third cylinder rod abuts against the wheel 110, thereby limiting the wheel 110 when the angle of the wheel 110 is adjusted.

[0040] Furthermore, the steering drive device further includes a stopper 151, which is hingedly connected to the end of the third cylinder rod, and the stopper 151 can swing in a horizontal plane as the third cylinder rod moves in a telescopic manner. The horizontal plane can also be understood as a plane parallel to the ground. Figure 3 As shown, when the third cylinder rod is extended, the end face of the stopper 151 at the end of the third cylinder rod abuts against the end face of the wheel 110. The surface contact between the stopper 151 and the wheel 110 further improves the stability of the stopper 151 in limiting the position of the wheel 110. In order to achieve an articulated connection between the stopper 151 and the end of the third cylinder rod, the stopper 151 and the end of the third cylinder rod can be connected by a rotating shaft.

[0041] In addition, during the extension and retraction of the third cylinder rod, in order to ensure that the stopper 151 stably rotates about the connecting axis between the stopper 151 and the end of the third cylinder rod as the third cylinder rod retracts and retracts, thereby better contacting the end surface of the wheel 110, the rotation drive device further includes a cylinder rod support seat 171 and a connecting rod 172. The cylinder rod support seat 171 is fixed to the support frame 100, and the ends of the connecting rod 172 are respectively hingedly connected to the cylinder rod support seat 171 and the stopper 151. In this embodiment, the third cylinder rod, the cylinder rod support seat 171, the connecting rod 172, and the stopper 151 form a four-bar linkage. The cylinder rod support seat 171 and the connecting rod 172, as well as the connecting rod 172 and the stopper 151, can be hingedly connected via a rotating shaft. In this four-bar linkage, as the third cylinder rod retracts and retracts, the stopper 151 swings within a certain angle range.

[0042] In some embodiments of the present invention, the steering drive device further comprises a wheel fork, the end of which is connected to the end of the support frame 100, and the two fork arms 161 of the wheel fork are respectively located on the upper and lower sides of the wheel hub of the wheel 110, and each fork arm 161 is connected to the wheel hub of the wheel 110 via a first rotating shaft. Figure 2As shown, the two fork arms 161 of the wheel fork are symmetrically arranged in the upper and lower parts, and the two fork arms 161 are connected to the hub of the wheel 110 through two first rotating shafts. When the two-stage cylinder rod 132 of the second hydraulic cylinder is extended, since the end of the two-stage cylinder rod 132 is hingedly connected to the wheel 110, the wheel 110 rotates around the first rotating shaft as the two-stage cylinder rod 132 is extended and retracted, thereby realizing the adjustment of the angle between the wheel 110 and the support frame 100, so that the wheel 110 can be transformed from a straight-ahead state to an in-place steering state, or from an in-place steering state to a straight-ahead state.

[0043] Furthermore, the support frame 100 and the wheel fork can be an integral structure, that is, the support frame 100 and the wheel fork are processed by integral molding. In addition, the support frame 100 and the wheel fork can also be a separate structure, in which case the end of the wheel fork is connected to the end of the support frame 100 in a detachable or non-detachable manner; illustratively, detachable connection methods include screw connection, bolt connection, and threaded connection, etc., and non-detachable connection methods include welding connection and adhesive connection, etc. When the upper and lower sides of the wheel hub of the wheel 110 are respectively hingedly connected by the first rotating shaft and the fork arm 161 of the wheel fork, the end of the two-stage cylinder rod 132 of the second hydraulic cylinder can be specifically located at the front side or rear side of the wheel hub of the wheel 110, and the end of the two-stage cylinder rod 132 is connected to the wheel 110 via the second rotating shaft. In this embodiment, the end of the two-stage cylinder rod 132 and the hub of the wheel 110 are hingedly connected via a second rotating shaft. The axis of the second rotating shaft is parallel to the axis of the first rotating shaft, and the axis of the second rotating shaft and the axis of the first rotating shaft are both perpendicular to the axle axis of the wheel 110. That is, it can also be understood that the axis of the first rotating shaft and the axis of the second rotating shaft are both perpendicular to the horizontal plane.

[0044] In some embodiments of the present invention, wheels 110 are provided at both ends of the support frame 100, and two first hydraulic cylinders and two second hydraulic cylinders are provided on the support frame 100 in a bilaterally symmetrical manner. Figures 1 to 6 As shown, the wheels 110 at both ends of the support frame 100 are symmetrically arranged. If the support frame 100 serves as the front axle frame of a wheeled excavator, the two wheels 110 on both sides of the support frame 100 are the two front wheels 110 of the wheeled excavator; similarly, when the support frame 100 serves as the rear axle frame of the wheeled excavator, the two wheels 110 on both sides of the support frame 100 are the two rear wheels 110 of the wheeled excavator.

[0045] In the above embodiment, each wheel 110 on both sides of the support frame 100 is respectively provided with a first hydraulic cylinder, a second hydraulic cylinder and a limit oil cylinder, and the two first hydraulic cylinders, the two second hydraulic cylinders and the two limit oil cylinders are symmetrically arranged.

[0046] According to another aspect of the present invention, an excavator is further disclosed, which includes the excavator wheel steering drive device as described in any of the above embodiments.

[0047] Through the above embodiments, it can be found that in the excavator wheel steering drive device and excavator disclosed in the above embodiments, the second cylinder body of the second hydraulic cylinder is fixed on the first cylinder rod, and the wheel is hingedly connected to the end of the two-stage cylinder rod. In addition, the wheel is also hingedly connected to the end of the support frame. Therefore, the present application is based on the extension and retraction of the first cylinder rod and the two-stage cylinder rod to drive the wheel to rotate along an axis perpendicular to the ground, thereby adjusting the angle of the wheel, making the wheel excavator work in an in-place steering state or a straight-moving state, and improving the in-place steering stability of the wheel excavator.

[0048] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or replace features of other embodiments.

[0049] The above-listed embodiments show and describe the basic principles and main features of the present invention, but the present invention is not limited to the above-mentioned embodiments. Any modifications, equivalent changes and modifications made to the present invention by those skilled in the art without making any creative work should fall within the scope of protection of the technical solution of the present invention.

Claims

1. An excavator wheel steering drive device, characterized in that: The steering drive device comprises: Support frame; A wheel is provided at an end of the support frame, and the wheel is hingedly connected to the end of the support frame; A first hydraulic cylinder, comprising a first cylinder body and a first cylinder rod, wherein the first cylinder body is fixed on the support frame; The second hydraulic cylinder includes a second cylinder body and a two-stage cylinder rod. The second cylinder body is fixed on the first cylinder rod. The end of the two-stage cylinder rod is hingedly connected to the wheel.

2. The excavator wheel steering drive device according to claim 1, characterized in that: The steering drive device includes a wheel limiting oil cylinder, and the wheel limiting oil cylinder includes a third cylinder body and a third cylinder rod. The third cylinder body is fixed on the support frame, and the third cylinder rod is used to limit the wheel when it is extended.

3. The excavator wheel steering drive device according to claim 2, characterized in that: The steering drive device further comprises a stopper, which is hingedly connected to the end of the third cylinder rod and can swing in a horizontal plane along with the telescopic movement of the third cylinder rod.

4. The excavator wheel steering drive device according to claim 1, characterized in that: The steering drive device also includes a wheel fork, the end of which is connected to the end of the support frame, the two fork arms of the wheel fork are respectively located on the upper and lower sides of the wheel hub, and each fork arm is connected to the wheel hub through a first rotating shaft.

5. The excavator wheel steering drive device according to claim 4, characterized in that: The support frame and the wheel fork are an integrated structure.

6. The excavator wheel steering drive device according to claim 4, characterized in that: The end of the two-stage cylinder rod is located at the front side or the rear side of the wheel hub, and the end of the two-stage cylinder rod is connected to the wheel through a second rotating shaft.

7. The excavator wheel steering drive device according to claim 1, characterized in that: Wheels are provided at both ends of the support frame, and two first hydraulic cylinders and two second hydraulic cylinders are symmetrically provided on the support frame.

8. The excavator wheel steering drive device according to claim 3, characterized in that: The steering drive device further comprises a cylinder rod support seat and a connecting rod, wherein the cylinder rod support seat is fixed on the support frame, and the two ends of the connecting rod are respectively hingedly connected to the cylinder rod support seat and the stop block.

9. The excavator wheel steering drive device according to claim 6, characterized in that: The axis of the first rotating shaft and the axis of the second rotating shaft are both perpendicular to the horizontal plane.

10. An excavator, characterized in that: The excavator includes the excavator wheel steering drive device according to any one of claims 1 to 9.

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