A length-adjustable rocker structure, a working device, and an excavator

Abstract

This utility model discloses an adjustable rocker arm structure, a working device, and an excavator. One end of the first fixed component along its length is a hinged end, and the other end along its length is a sliding end. One end of the second fixed component along its length is also a hinged end, and the other end along its length is a sliding end. The first and second fixed components are arranged opposite each other with their sliding ends to form a discontinuous strip plate. A slide rail assembly is engaged with the sliding ends of the first and second fixed components, limiting the movement direction of the first and second fixed components so that they can only move linearly within the slide rail assembly. A rotating component is located in the gap between the first and second fixed components. The two ends of the rotating component along its length are connected to the first and second fixed components respectively to form a helical pair. Rotating the rotating component in either the forward or reverse direction causes the first and second fixed components to move towards or away from each other, thereby achieving stepless adjustment of the rocker arm length.

Description

Technical Field

[0001] This utility model relates to an adjustable length rocker arm structure, belonging to the field of excavator technology. Background Technology

[0002] like Figure 2 As shown, when a traditional excavator performs bucket digging or other attachment work, the bucket cylinder 13 located on the stick 12 pushes the rocker arm 14, connecting rod 15, bucket 16 and stick 12 to form a four-bar linkage mechanism, which realizes the outward and inward movement of the bucket 16 or the attachment, and realizes the normal digging function or other attachment functions.

[0003] like Figure 1 As shown, the rocker arm is a key structural component for the movement of the excavator's working device. Existing rocker arms are commonly welded parts with non-adjustable lengths. When the bucket's working condition or excavator attachments are changed, requiring adjustments to the outward and inward tilting angles or the four-bar linkage ratio, the rocker arm length cannot be adjusted accordingly, failing to meet customer needs. Alternatively, replacing the rocker arm with a different one requires a longer production cycle and results in wasted rocker arms. The product's inability to adapt to market demands negatively impacts its competitiveness. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a length-adjustable rocker arm structure. Unlike conventional rockers, this newly designed rocker arm features an adjustable length. The length of the connecting rod can be adjusted according to different inward and outward angles of the assembled bucket or implement, as well as variations in the four-bar linkage transmission ratio, to meet the needs of various working conditions. The structure uses a threaded connection, providing good impact resistance. The adjustment mechanism consists of screws with different helical directions on both sides, enabling stepless length adjustment. The state is maintained by two nuts with different helical directions, resulting in a simple structure.

[0005] This utility model is achieved according to the following technical solution:

[0006] In a first aspect, this utility model provides a length-adjustable rocker structure, comprising:

[0007] The first fixed component has one end in the length direction set as a hinge end and the other end in the length direction set as a sliding end;

[0008] The second fixing component has one end in the length direction as a hinge end and the other end in the length direction as a sliding end; the first and second fixing components are arranged with their sliding ends facing each other to form a discontinuous strip plate;

[0009] The slide rail assembly is snapped onto the sliding end of the first and second fixed components, limiting the movement direction of the first and second fixed components so that the first and second fixed components can only move linearly within the slide rail assembly;

[0010] The rotating component is located in the gap between the first and second fixed components. The two ends of the rotating component along its length are connected to the first and second fixed components respectively to form a helical pair. Rotating the rotating component in the forward or reverse direction causes the first and second fixed components to move towards or away from each other, thereby realizing stepless adjustment of the rocker arm length.

[0011] In some embodiments, the first fixing component consists of a fixing plate and a left-hand stud, wherein one end of the fixing plate in the length direction is provided with a hinge hole and the other end in the length direction is provided with a notch, and the left-hand stud is welded to the notch; the second fixing component consists of a fixing plate and a right-hand stud, wherein one end of the fixing plate in the length direction is provided with a hinge hole and the other end in the length direction is provided with a notch, and the right-hand stud is welded to the notch; the rotating component is a screw with a left-hand thread in the left half and a right-hand thread in the right half, and the screw is used in conjunction with the left-hand stud and the right-hand stud.

[0012] In some embodiments, the central region of the screw is provided with a radial protrusion, the protrusion being a polygonal structure, used to cooperate with a wrench to drive the screw to rotate.

[0013] In some embodiments, a left-hand locking nut is provided on the left-hand thread of the screw, and a right-hand locking nut is provided on the right-hand thread of the screw, which is used to lock the screw after the length of the rocker arm is adjusted to prevent it from rotating.

[0014] In some embodiments, the slide rail assembly is an n-type plate, and the fixing plates of the first fixing component and the second fixing component are inserted into the n-type plate; a locking component is provided between the fixing plate and the opposing sides of the n-type plate to prevent the n-type plate from falling off.

[0015] In some embodiments, the side of the fixing plate is provided with an elongated protrusion, and the side of the n-type card plate is provided with an elongated groove that cooperates with the protrusion to form a snap-fit ​​component; or, the side of the fixing plate is provided with an elongated groove, and the side of the n-type card plate is provided with an elongated protrusion that cooperates with the protrusion to form a snap-fit ​​component.

[0016] In some embodiments, the fixing plates of the first fixing component and the second fixing component are chamfered at the ends of their hinge holes to form arc-shaped hinge ends.

[0017] Secondly, this utility model provides a working device, including a stick, a connecting rod, attachments, and the aforementioned length-adjustable rocker structure.

[0018] Thirdly, this utility model provides an excavator, including the aforementioned working device.

[0019] The beneficial effects of this utility model are:

[0020] (1) This structure can realize stepless adjustment of the linkage length to meet the different range of motion requirements of different attachments, and can realize rapid adjustment of the rocker arm length, saving time;

[0021] (2) The adjustment mechanism is mainly composed of screws with different directions of rotation on both sides. It has a simple structure and is easy to assemble. Attached Figure Description

[0022] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0023] In the attached diagram:

[0024] Figure 1 This is a schematic diagram of a joystick using existing technology.

[0025] Figure 2 This is an assembly drawing of a joystick based on existing technology;

[0026] Attached diagram labels: 12, boom; 13, bucket cylinder; 14, rocker arm; 15, connecting rod; 16, bucket.

[0027] Figure 3 This is a schematic diagram of the adjustable rocker arm structure of this utility model;

[0028] Figure 4 This is a cross-sectional view of the adjustable rocker arm structure of this utility model;

[0029] Figure 5 This is a schematic diagram of the second fixing component of this utility model;

[0030] Figure 6 This is a schematic diagram of the screw of this utility model.

[0031] The attached diagrams are labeled as follows: 1. First fixing component; 2. Slide rail assembly; 3. Left-hand lock nut; 4. Screw; 5. Right-hand lock nut; 6. Second fixing component; 4-1. Left-hand thread; 4-2. Right-hand thread; 6-1. Right-hand stud; 6-2. Fixing plate.

[0032] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", 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.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] like Figure 3 , Figure 4 As shown, an adjustable rocker arm structure includes a first fixed component 1, a second fixed component 6, a slide rail assembly 2, and a rotating assembly. One end of the first fixed component 1 along its length is a hinged end, and the other end along its length is a sliding end. One end of the second fixed component 6 along its length is a hinged end, and the other end along its length is a sliding end. The first and second fixed components 1 and 6 are arranged opposite each other with their sliding ends to form a discontinuous strip plate. The slide rail assembly 2 is engaged with the sliding ends of the first and second fixed components 1 and 6, limiting the movement direction of the first and second fixed components 1 and 6, so that the first and second fixed components 1 and 6 can only move linearly within the slide rail assembly 2. The rotating assembly is located in the gap between the first and second fixed components 1 and 6, and its two ends along its length are connected to the first and second fixed components 1 and 6 respectively to form a helical pair. Rotating the rotating assembly in the forward or reverse direction causes the first and second fixed components 1 and 6 to move towards or away from each other, thereby achieving stepless adjustment of the rocker arm length.

[0037] The specific structures of the first and second fixed components and the rotating component described above will be further explained below.

[0038] like Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the first fixing component 1 consists of a fixing plate and a left-hand stud. One end of the fixing plate in the length direction has a hinge hole, and the other end in the length direction has a notch. The left-hand stud is welded to the notch. The second fixing component 6 consists of a fixing plate 6-2 and a right-hand stud 6-1. One end of the fixing plate 6-2 in the length direction has a hinge hole, and the other end in the length direction has a notch. The right-hand stud 6-1 is welded to the notch. The rotating component is a screw 4 with a left-hand thread 4-1 in the left half and a right-hand thread 4-2 in the right half. The screw 4 is used in conjunction with the left-hand stud and the right-hand stud 6-1.

[0039] Further options, such as Figure 6 As shown, the middle area of ​​the screw 4 is provided with a radial protrusion. The protrusion has a polygonal structure and is used to cooperate with the wrench to drive the screw 4 to rotate.

[0040] Further options, such as Figure 3 , Figure 4 As shown, a left-hand locking nut 3 is provided on the left-hand thread 4-1 of the screw 4, and a right-hand locking nut 5 is provided on the right-hand thread 4-2 of the screw 4. After the length of the rocker arm is adjusted, the screw 4 is used to lock the screw 4 to prevent it from rotating.

[0041] The following provides a further explanation of the specific structure of the slide rail assembly described above.

[0042] like Figure 3 , Figure 4 As shown, the slide rail assembly 2 is an n-type plate, and the fixing plates of the first fixing assembly 1 and the second fixing assembly 6 are inserted into the n-type plate; a snap-fit ​​component is provided between the fixing plate and the opposing side of the n-type plate to prevent the n-type plate from falling off.

[0043] In a further embodiment, the side of the fixing plate is provided with an elongated protrusion, and the side of the n-type card plate is provided with an elongated groove that cooperates with the protrusion to form a snap-fit ​​component; or, the side of the fixing plate is provided with an elongated groove, and the side of the n-type card plate is provided with an elongated protrusion that cooperates with the protrusion to form a snap-fit ​​component.

[0044] like Figure 3 , Figure 4 , Figure 5 As shown, the fixing plates of the first fixing component 1 and the second fixing component 6 have arc-shaped chamfers at the ends of their hinge holes to form arc-shaped hinge ends.

[0045] When adjusting the joystick length, first loosen the left-hand locking nut 3 and the right-hand locking nut 5; then use a wrench to adjust the screw 4 in the middle. To shorten the joystick length, rotate it to the left relative to the first fixing component 1. This shortens the distance between the screw 4 and the first fixing component 1 and the second fixing component 6, thus reducing the joystick length. To increase the joystick length, rotate it to the right relative to the first fixing component 1. This increases the distance between the screw 4 and the first fixing component 1 and the second fixing component 6, thus increasing the joystick length. Finally, when the joystick length is adjusted to the appropriate length, tighten the left-hand locking nut 3 and the right-hand locking nut 5 respectively. After completing the above steps, the joystick length adjustment is finished.

[0046] In summary, this utility model provides a length-adjustable rocker structure, achieving the following functions and effects:

[0047] (1) The adjustment mechanism is mainly composed of screws with different directions of rotation. By rotating the screws to the left and right, the distance between the screws and the left and right rocker arm assemblies can be adjusted, thereby achieving stepless adjustment of the rocker arm length.

[0048] (2) The length can be adjusted and the state can be maintained by adjusting two nuts with different directions of rotation. The structure is simple and easy to implement.

[0049] The working device provided by this utility model is described below. The working device described below can be referred to in correspondence with the length-adjustable rocker structure described above.

[0050] The working device provided by this utility model may include a length-adjustable rocker structure as described in any of the above embodiments.

[0051] The beneficial effects achieved by the working device provided by this utility model are consistent with the beneficial effects achieved by the length-adjustable rocker structure provided by this utility model, so they will not be repeated here.

[0052] The excavator provided by this utility model is described below. The working device described below can be referred to in correspondence with the working device described above.

[0053] The excavator provided by this utility model may include the working device as described in any of the above embodiments.

[0054] The beneficial effects achieved by the excavator provided by this utility model are consistent with the beneficial effects achieved by the working device provided by this utility model, so they will not be repeated here.

[0055] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0056] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0057] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A length-adjustable rocker structure, characterized in that, include: The first fixed component has one end in the length direction set as a hinge end and the other end in the length direction set as a sliding end; The second fixing component has one end in the length direction as a hinge end and the other end in the length direction as a sliding end; the first and second fixing components are arranged with their sliding ends facing each other to form a discontinuous strip plate; The slide rail assembly is snapped onto the sliding end of the first and second fixed components, limiting the movement direction of the first and second fixed components so that the first and second fixed components can only move linearly within the slide rail assembly; The rotating component is located in the gap between the first and second fixed components. The two ends of the rotating component along its length are connected to the first and second fixed components respectively to form a helical pair. Rotating the rotating component in the forward or reverse direction causes the first and second fixed components to move towards or away from each other, thereby realizing stepless adjustment of the rocker arm length.

2. The adjustable rocker arm structure according to claim 1, characterized in that: The first fixing component consists of a fixing plate and a left-hand stud. One end of the fixing plate in the length direction is provided with a hinge hole, and the other end in the length direction is provided with a notch. The left-hand stud is welded to the notch. The second fixing component consists of a fixing plate and a right-hand stud. One end of the fixing plate in the length direction is provided with a hinge hole, and the other end in the length direction is provided with a notch. The right-hand stud is welded to the notch. The rotating component is a screw with a left-hand thread in the left half and a right-hand thread in the right half, and the screw is used in conjunction with a left-hand stud and a right-hand stud.

3. The adjustable rocker arm structure according to claim 2, characterized in that: The screw has a radial protrusion in the middle area, which is a polygonal structure used to cooperate with a wrench to drive the screw to rotate.

4. The adjustable rocker arm structure according to claim 2, characterized in that: A left-hand locking nut is provided on the left-hand thread of the screw, and a right-hand locking nut is provided on the right-hand thread of the screw. After the length of the rocker arm is adjusted, the screw is locked to prevent it from rotating.

5. The adjustable rocker arm structure according to claim 2, characterized in that: The slide rail assembly is an n-type clamping plate, and the fixing plates of the first fixing component and the second fixing component are inserted into the n-type clamping plate; a clamping component is provided between the fixing plate and the opposing side of the n-type clamping plate to prevent the n-type clamping plate from falling off.

6. The length-adjustable rocker structure according to claim 5, characterized in that: The side of the fixing plate has an elongated protrusion, and the side of the n-type clamping plate has an elongated groove that mates with the protrusion to form a clamping component; or, The side of the fixing plate is provided with an elongated groove, and the side of the n-type card plate is provided with an elongated protrusion that cooperates with the protrusion to form a snap-fit ​​component.

7. The length-adjustable rocker structure according to claim 2, characterized in that: The fixing plates of the first fixing component and the second fixing component have an arc-shaped chamfer at the end of their hinge holes to form an arc-shaped hinge end.

8. A working device, comprising a boom, a connecting rod, and attachments, characterized in that: It also includes the length-adjustable rocker structure as described in any one of claims 1 to 7.

9. An excavator, characterized in that: Includes the working device as described in claim 8.

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