Lifting arm structure and working machine

Abstract

The utility model relates to the technical field of operation machinery discloses a kind of lifting arm structures, comprising: rack;Lifting arm, one end of lifting arm is hinged with rack;And first actuating device, first actuating device includes the first actuating unit for driving lifting arm rotates around rack and the first connecting unit and the second connecting unit respectively arranged on first actuating unit;Wherein, first connecting unit is arranged on the side wall of first actuating unit and is hinged with one of lifting arm or rack, and the second connecting unit is hinged with the other of lifting arm or rack. By the above technical scheme, first connecting unit is arranged on the side wall of first actuating unit, so that the overall length of first actuating device can be reduced, so that the installation space of first actuating device is reduced, and the effective lifting height of first actuating device is improved.

Description

Technical Field

[0001] This utility model relates to the field of work machinery technology, specifically to a lifting arm structure. Furthermore, this utility model also specifically relates to a work machinery. Background Technology

[0002] In specialized work equipment such as loaders, excavators, tractors, and aerial work platforms, lifting boom structures are typically used to control the raising and lowering of the load. The lifting boom structure uses actuators, such as hydraulic cylinders and electric cylinders, to drive the movement of the lifting boom and thus control the movement of the load. However, in existing lifting boom structures, the overall length of the actuators is relatively long, resulting in a large space occupation. Furthermore, existing lifting boom structures also suffer from a relatively low effective lifting height of the actuators. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of large installation space and low effective lifting height in the existing technology, and to provide a lifting arm structure that has the advantages of small space occupation and large effective lifting height.

[0004] To achieve the above objectives, the present invention provides a lifting arm structure comprising: a frame; a lifting arm, one end of which is hinged to the frame; and a first actuation device, the first actuation device comprising a first actuation unit for driving the lifting arm to rotate around the frame, and a first connecting unit and a second connecting unit respectively disposed on the first actuation unit; wherein, the first connecting unit is disposed on the side wall of the first actuation unit and hinged to one of the lifting arm or the frame, and the second connecting unit is hinged to the other of the lifting arm or the frame.

[0005] In some embodiments, the lifting arm structure includes a first pin and a bolt, the first connecting unit includes a mounting component disposed on both side walls of the first actuation unit and having mounting holes and fixing holes, one end of the first pin passes through the wall of either the lifting arm or the frame and extends into the mounting hole, and the bolt is installed in the fixing hole and passes through the mounting hole and the first pin.

[0006] In some embodiments, the second connection unit is disposed on the side wall of the first actuation unit.

[0007] In some embodiments, one of the first connecting unit or the second connecting unit is hinged to the frame at a position near the middle of the frame in the horizontal direction, and the other of the first connecting unit or the second connecting unit is hinged to the lifting arm at one end near the hinge point between the lifting arm and the frame.

[0008] In some embodiments, the lifting arm structure includes only one of the first actuation devices.

[0009] In some embodiments, the first actuation unit includes a motor and an electric cylinder drivenly connected to the motor, and the first connection unit is disposed on the side wall of the electric cylinder.

[0010] In some embodiments, the first connecting unit is disposed away from the output end of the first actuation unit, and the first connecting unit is hinged to the lifting arm.

[0011] Based on this, the present invention also provides a working machine, including a bucket, a second actuation device and the aforementioned lifting arm structure, wherein the bucket is hinged to the other end of the lifting arm, and the second actuation device is hinged to the other end of the bucket and the other end of the lifting arm respectively, so as to drive the bucket to rotate around the other end of the lifting arm.

[0012] In some embodiments, the second actuation device includes a second actuation unit for driving the bucket to rotate about the other end of the lifting arm, and a third connecting unit and a fourth connecting unit disposed on the second actuation unit, wherein the third connecting unit is hinged to one of the lifting arm or the bucket, and the fourth connecting unit is hinged to the other of the lifting arm or the bucket; wherein the third connecting unit and / or the fourth connecting unit is disposed on the side wall of the second actuation unit.

[0013] In some embodiments, the third connecting unit is located away from the output end of the second actuation unit and disposed on the side wall of the second actuation unit, and the third connecting unit is hinged to the lifting arm.

[0014] Through the above technical solution, the first actuation device is hinged to the lifting arm and the frame respectively through a first connecting unit and a second connecting unit. The movement of the first actuation unit, such as telescopic movement, drives the lifting arm to rotate around the frame. In this invention, the first connecting unit is disposed on the side wall of the first actuation unit, rather than at its end, thereby reducing the overall length of the first actuation device and thus reducing the installation space required. Furthermore, while the overall length of the first actuation device is reduced, the lifting height of the lifting arm remains the same. Therefore, compared with the prior art, the first actuation device of this invention has a shorter overall length while achieving the same effective lifting height. In other words, the first actuation device of this invention achieves a greater effective lifting height with the same overall length as existing actuation devices.

[0015] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of one working state of the operating machinery provided by this utility model; Figure 2 This is a structural schematic diagram of another working state of the operating machinery provided by this utility model; Figure 3 This is a schematic diagram of another structure of the first actuation device provided by this utility model; Figure 4 It is along Figure 1 Schematic diagram of the cross-sectional structure along the AA direction; Figure 5 This is a schematic diagram of the lifting motion of the working machinery provided by this utility model.

[0017] Explanation of reference numerals in the attached figures 1-Frame; 2-Lifting arm; 3-First actuation device; 301-Motor; 302-Electric cylinder; 303-First connecting unit; 304-Second connecting unit; 4-Second actuation device; 5-Bucket; 6-Second pin; 7-Pin pressure plate; 8-First pin; 9-Bolt; 10-First position; 11-Second position. Detailed Implementation

[0018] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0019] In this utility model, unless otherwise stated, the terms "upper," "lower," "left," "right," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this utility model, the descriptions using terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In a lifting arm structure, actuators, such as hydraulic cylinders and electric cylinders, drive the movement of the lifting arm to fulfill various operational requirements. Currently, in lifting arm structures, the two interfaces of the actuator are located at opposite ends of the actuator and are hinged to the lifting arm and frame, respectively. However, placing the interfaces at both ends of the actuator increases its overall length, thereby increasing the installation space required. Furthermore, the overall length of the actuator includes the length of the interfaces at both ends, resulting in a smaller effective lifting height, such as a shorter extension length.

[0024] This utility model addresses the problems of large installation space occupation and low effective lifting height in existing technologies by providing a lifting arm structure. See also... Figures 1-3 as well as Figure 5As shown, the lifting arm structure provided by this utility model includes: a frame 1, a lifting arm 2, and a first actuation device 3. The frame 1 is used to mount the lifting arm 2 and the first actuation device 3. Specifically, one end of the lifting arm 2 is hinged to the frame 1. The first actuation device 3 includes a first actuation unit, a first connecting unit 303, and a second connecting unit 304. The first connecting unit 303 and the second connecting unit 304 are respectively disposed on the first actuation unit, and the first connecting unit 303 is disposed on the side wall of the first actuation unit. The first connecting unit 303 is hinged to either the lifting arm 2 or the frame 1, and the second connecting unit 304 is hinged to the other of the lifting arm 2 or the frame 1. The first actuation unit is used to drive the lifting arm 2 to rotate around the frame 1.

[0025] In the lifting arm structure provided by this utility model, the first actuation device 3 is hinged to the lifting arm 2 and the frame 1 respectively through the first connecting unit 303 and the second connecting unit 304. The lifting arm 2 is driven to rotate around the frame 1 by the movement of the first actuation unit, such as telescopic movement. The first connecting unit 303 is disposed on the side wall of the first actuation unit, rather than at the end of the first actuation unit, thereby reducing the overall length of the first actuation device 3 and thus reducing the space occupied by the lifting arm structure. Moreover, although the overall length of the first actuation device 3 is reduced, the telescopic distance of the first actuation unit is not reduced. In other words, the effective lifting height is greater when the overall length of the first actuation device 3 of this utility model is the same as that of existing actuation devices.

[0026] According to the lifting arm structure of this utility model, the connection structure in which the first connecting unit 303 is hinged to either the lifting arm 2 or the frame 1 can take various forms. In one embodiment, combined with Figure 1 , Figure 3 and Figure 4 As shown, the lifting arm structure includes a first pin 8 and a bolt 9. The first connecting unit 303 includes mounting components disposed on both side walls of the first actuation unit, each having mounting holes and fixing holes. One end of the first pin 8 penetrates the wall of either the lifting arm 2 or the frame 1 and extends into the mounting hole. Along the radial extension direction of the first pin 8, the bolt 9 is installed in the fixing hole and penetrates both the mounting hole and the first pin 8, thereby achieving a hinged connection between the first connecting unit 303 and either the lifting arm 2 or the frame 1. Alternatively, in one embodiment, the mounting components may be disposed on only one side wall of the first actuation unit. Comparatively, having mounting components on both side walls of the first actuation unit makes the hinged connection between the first connecting unit 303 and either the lifting arm 2 or the frame 1 more stable and reliable.

[0027] In one variant embodiment, the first connecting unit 303 includes mounting shafts disposed on both side walls of the first actuation unit. These mounting shafts can penetrate the wall of either the lifting arm 2 or the frame 1. A pressure plate is installed on the side of this wall away from the first actuation unit to fix the mounting shafts, thereby achieving a hinged connection between the first connecting unit 303 and either the lifting arm 2 or the frame 1. To facilitate the installation of the first connecting unit 303, this wall surface is configured as a detachable structure.

[0028] In some implementations, combined Figures 1-3 As shown, the second connecting unit 304 can be disposed on the end of the first actuation unit. A through hole is formed on the second connecting unit 304. The lifting arm structure includes a second pin 6 and a pin pressure plate 7. The second pin 6 passes through the wall of either the lifting arm 2 or the frame 1 and the through hole on the second connecting unit 304. The pin pressure plate 7 is installed on the side of the wall away from the first actuation unit to fix the second pin 6.

[0029] Alternatively, in a preferred embodiment, the second connecting unit 304 is disposed on the side wall of the first actuation unit. In this case, the structure of the second connecting unit 304 can be the same as that of the first connecting unit 303, and will not be described in detail here. The second connecting unit 304 being disposed on the side wall of the first actuation unit further reduces the overall length of the first actuation device 3, reduces the installation space of the first actuation device 3, and increases the effective lifting height of the first actuation device 3.

[0030] According to the lifting arm structure of this utility model, the installation position of the first actuation device 3 can be arbitrary, as long as it can drive the lifting arm 2 to rotate around the frame 1. In a preferred embodiment, see... Figure 1 , Figure 2 and Figure 5 As shown, one of the first connecting unit 303 or the second connecting unit 304 is hinged to the frame 1 at a position near the middle of the frame 1 in the horizontal direction, and the other is hinged to the lifting arm 2 at one end near the hinge point between the lifting arm 2 and the frame 1. In a more preferred embodiment, one of the first connecting unit 303 or the second connecting unit 304 is hinged to the frame 1 at a position near the middle of the frame 1 in the horizontal direction. In the prior art, the actuating device is generally hinged at both ends of the lifting arm 2. Compared with the prior art, through the preferred embodiment of the present invention, the first actuating unit needs to move a shorter distance to achieve the same rotation angle and lifting height of the lifting arm 2, thereby improving the lifting efficiency of the first actuating device 3 of the present invention. Moreover, it makes reasonable use of the installation space within the frame 1, making the lifting arm structure of the present invention more compact. In addition, the fact that the other of the first connecting unit 303 or the second connecting unit 304 is close to the hinge point between the lifting arm 2 and the frame 1 is beneficial for the first actuating device 3 to drive the lifting arm 2 to rotate around the frame 1.

[0031] Moreover, see Figure 5 As shown, the first actuating device 3 drives the lifting arm 2 to rotate around the frame 1. Since the first actuating device 3 is hinged to the lifting arm 2, during the rotation of the lifting arm 2 around the frame 1, the first actuating device 3 will also oscillate relative to the lifting arm 2 while rotating with it. Furthermore, the greater the rotation angle of the lifting arm 2, the greater the oscillation amplitude of the first actuating device 3. Figure 5 As shown, when the lifting arm 2 rotates, the hinge connection point between the first actuation device 3 and the lifting arm 2 moves from the first position 10 to the second position 11. As mentioned above, compared with the prior art, the lifting arm structure of this utility model has higher lifting efficiency. When the lifting arm 2 rotates by the same angle, the distance that the first actuation unit needs to move is shorter, that is, the curve distance between the first position 10 and the second position 11 is shorter. At the same time, the swing amplitude of the first actuation device 3 is smaller, and the lifting trajectory of the first actuation device 3 is better.

[0032] In some embodiments, the lifting arm structure includes only one first actuating device 3, wherein one of the first connecting unit 303 or the second connecting unit 304 is hinged to the frame 1 near the horizontal center. This lifting arm structure can be applied to unmanned operating machinery. In operating machinery, such as loaders, excavators, and aerial work platforms, the operator's cab is generally located in the middle of the frame 1. In unmanned operating machinery, the first actuating device can be located in the middle of the frame 1, i.e., at the location of the operator's cab. Alternatively, this lifting arm structure can be applied to operating machinery with the operator's cab located at the rear or front. In the lifting arm structure provided by this utility model, the number of first actuating devices 3 is only one, eliminating the need to provide actuating devices at both the front and rear positions of the lifting arm 2. This eliminates the need to consider the synchronous drive problem of two actuating devices, making the motion control of the lifting arm 2 simpler. At the same time, it also makes the lifting arm structure simpler and saves manufacturing costs.

[0033] According to the lifting arm structure of this utility model, the first actuation unit can be driven, but is not limited to, by electric drive, hydraulic oil drive, pneumatic drive, etc. In one embodiment, the first actuation unit can be electrically driven, see [reference needed]. Figure 3 The first actuation unit shown includes a motor 301 and an electric cylinder 302 that is driven by the motor 301. A first connecting unit 303 is disposed on the side wall of the electric cylinder 302. The motor 301 drives the electric cylinder 302 to perform telescopic movements, thereby driving the lifting arm 2 to rotate around the frame 1.

[0034] In a preferred embodiment, the first connecting unit 303 is disposed away from the output end of the first actuating unit, and the first connecting unit 303 is hinged to the lifting arm 2. The first actuating unit generally includes a driving component and an output component, see, for example, [see...]. Figure 3As shown, the first drive unit includes a motor 301 and an electric cylinder 302. The motor 301 serves as the drive component, and the electric cylinder 302 serves as the output component. The motor 301 and electric cylinder 302 are typically arranged side-by-side, which allows for a shorter overall length of the first actuation unit. Furthermore, the length of the electric cylinder 302 is generally greater than the length of the motor 301, and the electric cylinder can extend and retract during operation. Therefore, when installing the first actuation unit, the end furthest from the output end of the first actuation unit needs to accommodate both the motor 301 and the electric cylinder 302, while the output end of the first actuation unit needs to accommodate the electric cylinder 302. Thus, the end furthest from the output end of the first actuation unit requires more installation space. The first connecting unit 303 is located furthest from the output end of the first actuation unit. The first connecting unit 303 is hinged to the lifting arm 2, which effectively utilizes the installation space of the lifting arm 2 while reducing the space occupied by the frame 1, making the entire lifting arm structure more compact.

[0035] In addition, this utility model also provides a working machine, see [link to relevant documentation]. Figure 1 , Figure 2 and Figure 5 As shown, the working machine includes the aforementioned lifting arm structure, the second actuation device 4, and the bucket 5. The bucket 5 is hinged to the other end of the lifting arm 2, and the second actuation device 4 is hinged to the other end of the bucket 5 and the lifting arm 2 respectively, so as to drive the bucket 5 to rotate around the other end of the lifting arm 2.

[0036] In some embodiments, the second actuation device 4 may employ a transmission actuation device structure. Alternatively, in a preferred embodiment, the second actuation device 4 includes a second actuation unit for driving the bucket 5 to rotate about the other end of the lifting arm 2, and a third connecting unit and a fourth connecting unit disposed on the second actuation unit. The third connecting unit is hinged to one of the lifting arm 2 or the bucket 5, and the fourth connecting unit is hinged to the other of the lifting arm 2 or the bucket 5. The third connecting unit and / or the fourth connecting unit are disposed on the side wall of the second actuation unit.

[0037] Furthermore, the third connecting unit is located away from the output end of the second actuation unit and is disposed on the side wall of the second actuation unit, and the third connecting unit is hinged to the lifting arm 2.

[0038] It is understood that, in the preferred embodiment of the working machinery of this utility model, the structure of the second actuating device 4 is the same as that of the first actuating device.

[0039] In some embodiments, the working machine may be a skid steer loader. Preferably, the working machine may be a mini skid steer loader, in which the operator's cab may be located at the rear of the frame 1, or the mini skid steer loader may be configured in an unmanned mode, thereby reducing the number of first actuation devices 3 required.

[0040] In some embodiments, the working machinery provided by this invention can be electrically driven or fuel-powered. When the working machinery is electrically driven, the first actuating device 3 and the second actuating device 4 can be electrically driven simultaneously.

[0041] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including the combination of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A lifting arm structure, characterized in that, include: Rack (1); A lifting arm (2), one end of which is hinged to the frame (1); and, The first actuation device (3) includes a first actuation unit for driving the lifting arm (2) to rotate around the frame (1) and a first connecting unit (303) and a second connecting unit (304) respectively disposed on the first actuation unit. The first connecting unit (303) is disposed on the side wall of the first actuation unit and is hinged to one of the lifting arm (2) or the frame (1), and the second connecting unit (304) is hinged to the other of the lifting arm (2) or the frame (1).

2. The lifting arm structure according to claim 1, characterized in that, The lifting arm structure includes a first pin (8) and a bolt (9). The first connecting unit (303) includes a mounting component disposed on both sides of the first actuation unit and having mounting holes and fixing holes. One end of the first pin (8) passes through the wall of either the lifting arm (2) or the frame (1) and extends into the mounting hole. The bolt (9) is installed in the fixing hole and passes through the mounting hole and the first pin (8).

3. The lifting arm structure according to claim 2, characterized in that, The second connection unit (304) is disposed on the side wall of the first actuation unit.

4. The lifting arm structure according to claim 1, characterized in that, One of the first connecting unit (303) or the second connecting unit (304) is hinged to the frame (1) at a midpoint in the horizontal direction near the frame (1), and the other of the first connecting unit (303) or the second connecting unit (304) is hinged to the lifting arm (2) at one end near the hinge point between the lifting arm (2) and the frame (1).

5. The lifting arm structure according to claim 4, characterized in that, The lifting arm structure includes only one of the first actuation devices (3).

6. The lifting arm structure according to claim 1, characterized in that, The first actuation unit includes a motor (301) and an electric cylinder (302) that is drivenly connected to the motor (301). The first connection unit (303) is disposed on the side wall of the electric cylinder (302).

7. The lifting arm structure according to any one of claims 1-6, characterized in that, The first connecting unit (303) is located away from the output end of the first actuation unit, and the first connecting unit (303) is hinged to the lifting arm (2).

8. A type of operating machinery, characterized in that, The device includes a bucket (5), a second actuation device (4), and a lifting arm structure according to any one of claims 1-7, wherein the bucket (5) is hinged to the other end of the lifting arm (2), and the second actuation device (4) is hinged to the other end of the bucket (5) and the lifting arm (2) respectively, so as to drive the bucket (5) to rotate about the other end of the lifting arm (2).

9. The operating machinery according to claim 8, characterized in that, The second actuation device (4) includes a second actuation unit for driving the bucket (5) to rotate about the other end of the lifting arm (2), and a third connection unit and a fourth connection unit disposed on the second actuation unit. The third connection unit is hinged to one of the lifting arm (2) or the bucket (5), and the fourth connection unit is hinged to the other of the lifting arm (2) or the bucket (5). The third connecting unit and / or the fourth connecting unit are disposed on the side wall of the second actuation unit.

10. The operating machinery according to claim 9, characterized in that, The third connecting unit is located away from the output end of the second actuation unit and is disposed on the side wall of the second actuation unit. The third connecting unit is hinged to the lifting arm (2).

Images