阅读说明：本技术 挖掘装载机 (Loader-digger ) 是由 薛璐 田磊 金伟伟 于 2019-12-16 设计创作，主要内容包括：本发明公开了一种挖掘装载机。挖掘装载机包括车架、侧移架、两个支腿组件以及驱动机构,其中,车架包括沿横向方向延伸的车架横梁；侧移架可移动地设置于车架横梁上；两个支腿组件间隔设置于车架横梁的横向两侧,驱动机构包括相互配合的第一配合件和第二配合件,第一配合件驱动支腿组件在所述横向方向上移动以调节两个支腿组件之间的距离,第二配合件驱动侧移架在车架横梁上移动。本发明的挖掘装载机的两个支腿组件之间的距离可调节,因此在工作中可以控制支腿组件沿横向方向伸出从而增加支承稳定性,并且利用一个驱动机构同时实现对支腿组件和侧移架的移动从而简化挖掘装载机的操作,提高作业效率。(The invention discloses a loader-digger. The excavating loader comprises a frame, a side moving frame, two supporting leg assemblies and a driving mechanism, wherein the frame comprises a frame cross beam extending along the transverse direction; the side moving frame is movably arranged on the frame cross beam; two landing leg subassembly intervals set up in the horizontal both sides of frame crossbeam, and actuating mechanism includes first fitting piece and the second fitting piece of mutually supporting, and first fitting piece drive landing leg subassembly is in remove in the transverse direction in order to adjust the distance between two landing leg subassemblies, and second fitting piece drive side moves on frame crossbeam. The distance between the two leg assemblies of the backhoe loader is adjustable, so that the leg assemblies can be controlled to extend in the transverse direction during operation to increase the support stability, and the leg assemblies and the side frames can be moved simultaneously by one driving mechanism to simplify the operation of the backhoe loader and improve the working efficiency.)

1. A backhoe loader comprising:

a frame (1) comprising a frame cross member (11) extending in a transverse direction;

the side moving frame (2) is movably arranged on the frame cross beam (11);

two leg assemblies (3) disposed at intervals on both lateral sides of the frame cross member (11), and

the driving mechanism comprises a first matching piece and a second matching piece matched with the first matching piece, one of the first matching piece and the second matching piece is in driving connection with the leg assembly (3), the other of the first matching piece and the second matching piece is in driving connection with the side moving frame (2), and the first matching piece and the second matching piece move relatively to each other to adjust the distance between the two leg assemblies (3) and drive the side moving frame (2) to move relative to the frame cross beam (11).

2. The backhoe loader of claim 1, wherein the drive mechanism is a first drive cylinder (4), the first drive cylinder (4) comprises a cylinder (41) and a piston rod engaged with the cylinder (41), the piston rod comprises a first piston rod (42) and a second piston rod (43), a piston end of the first piston rod (42) and a piston end of the second piston rod (43) are oppositely disposed to form a rodless chamber (a) of the first drive cylinder (4), the first piston rod (42) is drivingly connected with one of the two leg assemblies (3), the second piston rod (43) is drivingly connected with the other of the two leg assemblies (3), and the side-shift bracket (2) is connected to the cylinder (41).

3. The backhoe loader of claim 2, wherein the first piston rod (42) has an oil passage (42a), the oil passage (42a) communicating with the rodless cavity (a).

4. The backhoe loader of claim 2, further comprising a hydraulic pump (8) and a control valve block (6) disposed between the hydraulic pump (8) and the first drive cylinder (4), the control valve block (6) controlling oil at an oil outlet of the hydraulic pump (8) to selectively enter one of the rodless chamber, the first rod chamber, and the second rod chamber of the first drive cylinder (4).

5. The backhoe loader of claim 4, wherein the control valve group comprises a first control valve (6A) and a second control valve (6B) connected in series, the first control valve (6A) and the second control valve (6B) together controlling the flow direction of the oil at the oil outlet of the hydraulic pump (8). .

6. The backhoe loader of claim 1, wherein the frame (1) includes two frame cross members (11) arranged at a distance in a height direction, and the side frames (2) are connected to the two frame cross members (11).

7. The backhoe loader of any of claims 1 to 6, further comprising a locking mechanism that locks or unlocks the side frames (2) in the frame cross member (11) position.

8. The backhoe loader of any of claims 1 to 6, wherein the leg assembly (3) comprises a leg longitudinal beam (31) extending in a height direction and a leg cross beam (32) connected to the leg longitudinal beam (31), the leg longitudinal beam (31) being connected to a piston rod of the first drive cylinder, the leg cross beam (32) being slidably disposed on the frame cross beam (11).

9. The backhoe loader of claim 8, wherein the leg assembly (3) further comprises a base provided on an underside of the leg stringer and a second drive cylinder that drives the base to move in a height direction relative to the leg stringer (31).

10. The backhoe loader of any of claims 1-6, wherein the drive mechanism is a rack and pinion drive mechanism; or the driving mechanism is a worm and gear driving mechanism.

Technical Field

The invention relates to the field of engineering machinery, in particular to a loader-digger.

Background

The backhoe loader is a small-sized multipurpose engineering machine, and is commonly called as a 'double-end busy' because a set of loading working device and a set of digging working device are respectively arranged at the front end and the rear end of the backhoe loader, and can be divided into a side-shifting type backhoe loader and a middle-placed type backhoe loader according to the arrangement form of the digging working devices.

For the side-shifting type loader-digger, the supporting leg structure is designed to be a straight leg type supporting leg, the supporting width is generally close to the width of a vehicle body, the supporting stability is poor, and therefore the stability of digging operation is poor. And the movement of the side moving frame is generally realized by the pushing of an excavating arm at present, so that the operation is inconvenient.

Disclosure of Invention

The invention aims to provide an excavating loader, which is used for improving the stability of excavating operation and the convenience of operation.

The invention provides a backhoe loader, comprising:

a frame including a frame rail extending in a lateral direction;

the side moving frame is movably arranged on the frame cross beam;

two leg assemblies spaced on either lateral side of the frame rail, an

The driving mechanism comprises a first matching piece and a second matching piece matched with the first matching piece, one of the first matching piece and the second matching piece is in driving connection with the supporting leg assembly, the other of the first matching piece and the second matching piece is in driving connection with the side shifting frame, and the first matching piece and the second matching piece move relative to each other to adjust the distance between the two supporting leg assemblies and drive the side shifting frame to move relative to the frame cross beam;

in some embodiments, the drive mechanism is a first drive cylinder, the first drive cylinder includes a cylinder barrel and a piston rod engaged with the cylinder barrel, the piston rod includes a first piston rod and a second piston rod, a piston end of the first piston rod and a piston end of the second piston rod are disposed opposite to form a rodless cavity of the first drive cylinder, the first piston rod is drivingly connected to one of the two leg assemblies, the second piston rod is drivingly connected to the other of the two leg assemblies, and the side shift frame is connected to the cylinder barrel.

In some embodiments, the first piston rod has an oil passage that communicates with the rodless cavity.

In some embodiments, the backhoe loader further comprises a hydraulic pump and a control valve group disposed between the hydraulic pump and the first drive cylinder, the control valve group controlling the oil at the oil outlet of the hydraulic pump to selectively enter one of the rodless chamber, the first rod chamber, and the second rod chamber of the first drive cylinder.

In some embodiments, the control valve group comprises a first control valve and a second control valve which are connected in sequence, and the first control valve and the second control valve jointly control the flow direction of oil at the oil outlet of the hydraulic pump.

In some embodiments, the frame includes two frame rails spaced apart in the height direction, and the side shift frame is coupled to the two frame rails.

In some embodiments, the backhoe loader further includes a locking mechanism that locks or unlocks the side frame at the frame cross member position.

In some embodiments, the leg assembly includes a leg longitudinal beam extending in the height direction and a leg cross beam connected to the leg longitudinal beam, the leg longitudinal beam being connected to the piston rod of the first drive cylinder, and the leg cross beam being slidably disposed on the frame cross beam.

In some embodiments, the leg assembly further includes a base disposed on an underside of the leg stringer and a second drive cylinder that drives the base to move in a height direction relative to the leg stringer.

In some embodiments, the drive mechanism is a rack and pinion drive mechanism; or the driving mechanism is a worm and gear driving mechanism.

The excavating loader comprises a frame, a side moving frame, two supporting leg assemblies and a driving mechanism, wherein the frame comprises a frame cross beam extending along the transverse direction; the side moving frame is movably arranged on the frame cross beam; two landing leg subassembly intervals set up in the horizontal both sides of frame crossbeam, actuating mechanism include first fitting piece and with first fitting piece complex second fitting piece, one in first fitting piece and the second fitting piece with landing leg subassembly drive connection, another and the side frame drive connection that moves in first fitting piece and the second fitting piece, first fitting piece and second fitting piece relative movement each other in order to adjust the distance between two landing leg subassemblies and drive the side move the frame and move for frame crossbeam removal. The distance between the two leg assemblies of the backhoe loader is adjustable, so that the leg assemblies can be controlled to extend in the transverse direction during operation to increase the support stability, and the leg assemblies and the side frames can be moved simultaneously by one driving mechanism to simplify the operation of the backhoe loader and improve the working efficiency.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic perspective view of a backhoe loader of an embodiment of the present invention;

FIG. 2 is a front view schematic illustration of the backhoe loader shown in FIG. 1;

FIG. 3 is a schematic sectional view of the driving mechanism of FIG. 1;

FIGS. 4-7 are schematic diagrams of the method of moving the legs and side frames of the backhoe loader shown in FIG. 1;

fig. 8 is a hydraulic control schematic diagram of the drive cylinder of fig. 1.

Each reference numeral represents:

1. vehicle frame

11. A frame cross member;

2. laterally moving the frame;

3. a leg assembly; 3A, a first leg assembly; 3B, a second leg assembly;

31. a leg stringer; 32. a leg beam;

4. a first drive cylinder;

41. a cylinder barrel; 42. a first piston rod; 42a, an oil passage; 43. a second piston rod;

5. clamping the oil cylinder;

6. a control valve group; 6A, a first control valve; 6B and a second control valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1 to 8, the backhoe loader of the embodiment of the present invention includes:

a frame 1 including a frame cross member 11 extending in a lateral direction;

the side moving frame 2 is movably connected to the frame cross beam 11;

two leg assemblies 3 spaced apart on either lateral side of the frame rail 11, an

And the driving mechanism comprises a first matching piece and a second matching piece matched with the first matching piece, one of the first matching piece and the second matching piece is in driving connection with the leg assembly, the other of the first matching piece and the second matching piece is in driving connection with the side shifting frame, and the first matching piece and the second matching piece move relative to each other to adjust the distance between the two leg assemblies and drive the side shifting frame 2 to move relative to the frame cross beam 11.

The distance between the two leg assemblies of the backhoe loader of the embodiment of the invention is adjustable, so that the leg assemblies can be controlled to extend in the transverse direction during operation to increase the support stability, and the leg assemblies 3 and the side shift frame 2 can be moved simultaneously by using one driving mechanism 4 to simplify the operation of the backhoe loader and improve the operation efficiency.

As shown in fig. 1, the vehicle body frame 1 of the present embodiment includes two frame cross members 11 arranged at intervals in the height direction, and the upper and lower ends of the side shift frame 2 are connected to the two frame cross members 11, respectively. The side shift frame 2 of the present embodiment is attached to the two frame rails 11 so that the movement of the side shift frame 2 is more stable.

The backhoe loader of the present embodiment further includes a locking mechanism that locks or unlocks the position of the side frames 2 on the frame cross member 11. Specifically, the locking mechanism of the present embodiment is a clamping cylinder 5. When the side moving frame 2 needs to be moved, the clamping oil cylinder 5 is controlled to act to unlock the side moving frame 2; when the side shift frame 2 is moved to the target position, the clamping cylinder 5 is controlled to act to lock the side shift frame to prevent the side shift frame 2 from moving. As shown in fig. 2 and 3, the driving mechanism of the present embodiment is a first driving cylinder 4, the first driving cylinder 4 includes a cylinder 41 and a first piston rod 42 and a second piston rod 43 movably disposed relative to the cylinder 41, a piston end of the first piston rod 42 and a piston end of the second piston rod 43 are disposed opposite to each other to form a rodless chamber a of the first driving cylinder 4, the first piston rod 42 is drivingly connected to one of the two leg assemblies 3, the second piston rod 43 is drivingly connected to the other of the two leg assemblies 3, and the side shift frame 2 is connected to the cylinder 41. As shown in fig. 3, the first driving cylinder 4 is divided into a rodless chamber a, a first rod chamber B and a second rod chamber C by two piston rods, and oil is selectively supplied to one of the three chambers of the rodless chamber a, the first rod chamber B and the second rod chamber C to drive the leg assembly or the side shift frame 4 to move. The cylinder 41 of the first drive cylinder of the present embodiment serves as a first engagement member, and the piston rod serves as a second engagement member.

As shown in fig. 2, the leg assembly 3 of the present embodiment includes a leg longitudinal beam 31 extending in the height direction and a leg cross beam 32 connected to the leg longitudinal beam 31, the leg longitudinal beam 31 is connected to a piston rod of the first drive cylinder 4, and the leg cross beam 32 is slidably disposed on the frame cross beam 11. When leg longitudinal beam 31 moves under the drive of the piston rod, leg cross beam 32 slides synchronously along frame cross beam 11 so as to improve the stability of support of leg assembly 3.

The leg assembly 3 of the present embodiment further includes a base disposed at the bottom of the leg longitudinal beam 31 and a second driving cylinder (not shown in the figure), and the second driving cylinder drives the base to move in the height direction relative to the leg longitudinal beam 31, so that the position of the leg assembly 3 can be regarded as the position for locking the leg assembly after the vehicle body is supported.

Specifically, in one embodiment, when the side shift frame 4 is clamped by the clamping cylinder 5, as the position of the side shift frame 4 is locked, the cylinder 41 is fixed, at this time, oil enters the rodless cavity a, oil returns to the first rod cavity B, and the first piston rod 41 moves to the left side to drive the leg assembly connected with the first piston rod 41 to move; when the supporting leg assembly connected with the first piston rod 41 moves to a target position, the second driving oil cylinder is controlled to act to enable the base to move downwards so as to enable the supporting leg assembly to be fixed, the first piston rod 41 connected with the supporting leg assembly is fixed, the rodless cavity A is filled with oil, the second rod cavity C is filled with oil, and the second piston rod 43 moves towards the right side so as to drive the supporting leg assembly connected with the second piston rod 43 to move; similarly, when the leg assemblies on the two sides are fixed, the first rod cavity B is filled with oil, the second rod cavity C is filled with oil, and the cylinder 41 moves to the right side to drive the side moving frame 2 to move to the right side relative to the frame cross beam 11.

As shown in fig. 3, the cylinder tube 41 of the present embodiment is provided with a first port E communicating with the first rod chamber B and a second port G communicating with the second rod chamber C. The first piston rod 42 of the present embodiment has an oil passage 42a, a first end of which forms the third port F of the first drive cylinder 4, and a second end of which 42a communicates with the rodless chamber a. Hydraulic oil can enter and exit the rodless chamber a of the cylinder 41 through this oil passage 42 a.

As shown in fig. 8, the excavation elevating conveyor of this embodiment further includes a hydraulic pump 8 and a control valve group 6 disposed between the hydraulic pump 8 and the first driving cylinder 4, wherein the control valve group 6 controls oil at the oil outlet of the hydraulic pump 8 to selectively enter one of the rodless chamber a, the first rod chamber B, and the second rod chamber C of the first driving cylinder 4.

Specifically, as shown in fig. 8, the control valve group 6 of the present embodiment includes a first control valve 6A and a second control valve 6B. The first control valve 6A and the second control valve 6B act together to achieve automated control of the first drive cylinder 4.

The operation of the backhoe loader of the present embodiment will be described in detail below.

As shown in fig. 4, when the backhoe loader is not performing the excavating work, the side shift 2 is placed on one side of the frame cross member 11 and fixed by the clamp cylinder 5. At this time, the first control valve 6A is located at the left position; the three oil ports of the first driving oil cylinder 4 are all cut off.

The second leg assembly 3B on the side closer to the traveling carriage 2 is controlled to be extended: the first control valve 6A is controlled to be in the middle position and the second control valve 6B is controlled to be in the left position, at this time, the first oil port E of the first driving oil cylinder 4 is closed, the second oil port F feeds oil, the third oil port G feeds oil, that is, at this time, the rodless cavity a feeds oil, and the second rod cavity C feeds oil, so that the second piston rod 43 moves rightwards and then drives the second supporting leg assembly 3B to move rightwards, as shown in fig. 5. After the second leg assembly 3B reaches the target position, the second drive cylinder drive base is controlled to move downward relative to the leg stringers 31 to the ground to support the side frames.

Fig. 5 shows that at this time, the side shift frame 2 is located at a position deviated to the right, and the side shift frame 2 needs to be moved back to the middle position, and the locking of the side shift frame 2 by the clamping cylinder 5 is firstly released; the first driving oil cylinder 4 is used for moving the side shifting frame 2 to the middle position of the frame cross beam 11 (as shown in fig. 6), specifically, as shown in fig. 8, the first control valve 6A is controlled to be located at the middle position and the second control valve 6B is controlled to be located at the middle position, the first oil port E of the first driving oil cylinder 4 is used for feeding oil, the second oil port F is stopped, the third oil port G is used for feeding oil, and the cylinder 41 moves to drive the side shifting frame 2 to move to the middle position leftwards; and then the side moving frame 2 is fixed by a clamping oil cylinder 5.

Controlling the first leg assembly 3A to extend: the first control valve 6A is controlled to be located at the middle position, the second control valve 6B is controlled to be located at the right position, the second oil port F is fed with oil, the first oil port E is fed with oil, the third oil port G is blocked, and as shown in fig. 7, the first piston rod 42 moves to the left side to drive the first leg assembly 3A to extend out; after the first leg assembly 3A reaches the target position, the side second drive cylinder is extended to drive the base to move to the ground to support the side frame.

And finally, adjusting the second driving oil cylinders on the two sides simultaneously until the vehicle body is supported to the horizontal position.

In other embodiments not shown in the drawings, the drive mechanism may also be a rack and pinion drive mechanism, where the first mating member is a rack and the second mating member is a pinion.

Or the driving mechanism is a worm and gear driving mechanism, the first fitting piece is a worm, and the second fitting piece is a worm gear

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.