Attachment quick change device, attachment assembly, and work machine for a work machine

Abstract

The utility model relates to a tool quick change device, tool assembly and operation machine for operation machine, the tool quick change device includes the main body, and the front side and back side of main body are suitable for connecting to the tool and host computer of operation machine respectively, the tool quick change device still includes two side hinge plates that stretch out from the front of main body and the intermediate hinge plate between two side hinge plates, every side hinge plate includes the hinge through -hole, and the hinge through -hole is suitable for the side pin shaft that can be connected with the tool passes through, and the intermediate hinge plate includes C-shaped hinge opening, and C-shaped hinge opening is suitable for receiving the intermediate pin shaft that can be connected with the tool, the tool quick change device according to the utility model utilizes simple and reliable connection structure to be able to simply and quickly assemble and disassemble relative to ordinary tool, need not design special quick change tool, thereby can save the research and development time and expense of tool greatly.

Description

Technical Field

[0001] This utility model relates to the field of work machinery parts, and in particular to a quick-change attachment device that enables quick replacement of attachments for work machinery. Background Technology

[0002] Loading machines such as loaders and excavators can be equipped with various specialized attachments to perform specific tasks. A basic loading machine can adapt to multiple operational needs by changing different attachments, achieving "one machine for multiple uses," thereby improving the operational efficiency of the main equipment and reducing equipment procurement costs. For example, a loader can use its bucket as the core basic attachment for routine operations such as loading and leveling. The bucket can include various types and / or capacities of buckets. In addition, loaders can also be equipped with other attachments such as grapples, forks, and sweepers to perform other operations such as grabbing, transporting, and cleaning. Loaders can use attachment quick-change devices (simply referred to as "quick-change devices") to quickly change various attachments, enabling rapid switching between different types or occasions of work, thereby improving operational efficiency and reducing the workload of the operator. In addition, quick-change devices also facilitate the rapid replacement of damaged or worn attachments of the same type.

[0003] However, current loader quick-change devices require the installation of dedicated quick-change buckets. For example, Figures 1 to 3 A conventional loader quick-change device 10 and its matching bucket 20 are shown. The quick-change device 10 has pins (not shown) at two positions A1 near its lower sides and a cylindrical tube B1 at its top. For connection with the quick-change device 10, the bucket 20 has two lugs A2 with through holes at the lower sides on its back side and two hook-shaped portions B2 at its top. The quick-change device 10 and the bucket 20 are assembled by hooking the two hook-shaped portions B2 of the bucket 20 onto the cylindrical tube B1 of the quick-change device 10 and passing the pins at the two positions A1 through the through holes in the two lugs A2 on the bucket 20. However, this specific configuration on the back side of the bucket 20 is not found in conventional or ordinary loader buckets, but is a special design adopted to cooperate with the quick-change device 10. Therefore, the bucket 20 described above is a special-purpose quick-change bucket. Designing such a dedicated quick-change bucket requires a lot of research and development time and costs. Taking into account the different bucket capacities will increase the types of buckets that need to be designed and manufactured, and these will also increase the procurement and storage costs for loader users. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the above-mentioned problems and / or other defects in the prior art.

[0005] To achieve the above objectives, one aspect of this utility model provides a quick-change attachment device for working machinery, comprising a main body, the front side and the back side of which are adapted to connect to an attachment and a main body of the working machinery, respectively. The quick-change attachment device further includes two side hinge plates extending from the front side of the main body and an intermediate hinge plate located between the two side hinge plates. Each side hinge plate includes a hinge through hole adapted for a side pin capable of connecting to the attachment to pass through. The intermediate hinge plate includes a C-shaped hinge opening adapted to receive an intermediate pin capable of connecting to the attachment.

[0006] According to one embodiment of the present invention, the quick-change device for the attachment further includes two guide plates extending from the front of the main body, each guide plate including a through hole through which a corresponding side pin passes and guides the movement of the side pin.

[0007] According to one embodiment of the present invention, the quick-change attachment device further includes a bidirectional hydraulic cylinder disposed on the front side of the main body, and each cylinder rod of the bidirectional hydraulic cylinder is provided with a corresponding side pin at its free end.

[0008] According to one embodiment of the present invention, each side hinge plate is provided with a boss on its left and right sides, and the boss is provided with a limiting step for limiting the position of the attachment relative to the attachment quick-change device in the front-back direction.

[0009] According to one embodiment of the present invention, the limiting step portion includes an arc-shaped surface adapted to abut against the positioning portion on the attachment in a shape matching the shape.

[0010] According to one embodiment of the present invention, the boss includes an inclined surface disposed at its front end, the inclined surface being adapted to allow the boss to avoid the positioning portion on the attachment so as to prevent the boss from interfering with the positioning portion.

[0011] According to one embodiment of the present invention, reinforcing members for strengthening the C-shaped hinge opening are fixed on the left and right sides of the C-shaped hinge opening, respectively.

[0012] Another aspect of this utility model provides an attachment assembly comprising an attachment for working machinery and an attachment quick-change device according to any of the preceding claims. The attachment includes two pairs of side lugs extending from its rear end and a pair of intermediate lugs located between the two pairs of side lugs. Each side hinge plate of the attachment quick-change device is fitted between corresponding pairs of side lugs and hinged to those pairs of side lugs by a corresponding side pin. The intermediate hinge plate of the attachment quick-change device is fitted between the pair of intermediate lugs and hinged to those pairs of intermediate lugs by the intermediate pin.

[0013] According to one embodiment of the present invention, the attachment is a bucket.

[0014] Another aspect of this utility model provides a working machine that includes an attachment assembly according to any of the above claims.

[0015] The attachment quick-change device of this utility model is specifically designed for the connection structure of ordinary attachments to adapt to the conventional or common attachments of operating machinery. This allows for easy and quick assembly and disassembly of ordinary attachments using a simple and reliable connection structure. Therefore, there is no need to design dedicated quick-change attachments, which greatly saves the development time and cost of attachments and reduces the types of attachments that need to be designed and manufactured. Furthermore, users of operating machinery do not need to purchase dedicated quick-change attachments; instead, they can replace various ordinary attachments of different capacities with the same model, thus saving users on the procurement and storage costs of attachments. Attached Figure Description

[0016] The features and advantages of this utility model will become clear from the following detailed description provided with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limitations on this utility model, wherein:

[0017] Figure 1 This is a perspective view of a quick-change device based on existing technology.

[0018] Figure 2 Is with Figure 1 The diagram shown is a perspective view of an existing dedicated quick-change bucket used with the quick-change device.

[0019] Figure 3 yes Figure 1 The quick-change device shown is Figure 2 The diagram shows a three-dimensional view of the special quick-change buckets assembled together.

[0020] Figure 4 This is a perspective view of a quick-change device according to an embodiment of the present invention, which is connected to the working arm mechanism of the working machinery and then assembled with the ordinary bucket of the working machinery.

[0021] Figure 5 yes Figure 4 The diagram shows a front-view perspective view of the quick-change device.

[0022] Figure 6 yes Figure 4 The image shown is a rear-view perspective view of a standard shovel bucket.

[0023] Figure 7 yes Figure 4 The diagram shown is an exploded view of the quick-change device and the ordinary bucket before they are assembled together.

[0024] Figure 8 yes Figure 4 The diagram shows a three-dimensional view of the quick-change device and a regular bucket assembled together.

[0025] Figure 9 yes Figure 8 The enlarged view of the part circled in dashed circles after removing the ear plates on the bucket. Detailed Implementation

[0026] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that implementations of the present invention may not include some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, the present invention can be conceived to be implemented with any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be construed as elements or limitations of the claims unless expressly set forth in the claims.

[0027] Figure 4 A quick-change attachment device (also referred to simply as "quick-change device") 100 according to an embodiment of the present invention is shown connected to an exemplary work machine with an attachment 200. Figure 4 The schematic diagram is shown in the figure (only partially shown). In this embodiment, a loader is used as an example of the working machinery, and the loader's bucket is used as an example of the attachment 200. However, the present invention is not limited to this. The quick-change device 100 can also be applied to any other type of working machinery (such as excavators) that performs operations related to a specific industry (such as mining, construction, agriculture, transportation, etc.) by means of replaceable specific attachments in various working environments (such as mines, construction sites, farms, and roads, etc.), and the attachment 200 can also be a working tool other than a bucket for performing other types of operations (such as a grab bucket, a forklift, etc.).

[0028] exist Figure 4 Only the boom mechanism 500 of the loader is shown, which can be considered as part of the main body of the loader, and includes components such as boom 510 and tie rod 520. The quick-change device 100 is connected to the end of the boom mechanism 500 on one hand and assembled with the attachment (bucket) 200 (hereinafter also referred to as bucket 200) on the other hand, so as to replaceably mount the bucket 200 on the main body of the loader.

[0029] The quick-change device 100 according to this utility model can be applied to the common buckets used in loaders. Figure 6A rear view of this typical bucket 200 is shown. It can be seen that the bucket 200 includes two pairs of side lugs 220 and a pair of intermediate lugs 210 extending from its rear, with the pair of intermediate lugs 210 located between the two pairs of side lugs 220. Each pair of side lugs 220 includes two side lugs 220 that can be arranged parallel to each other, while the pair of intermediate lugs 210 includes two intermediate lugs 210 that can be arranged parallel to each other. For force balance, advantageously, the two pairs of side lugs 220 can be arranged in a position approximately symmetrical to the left and right of the main body of the bucket 200, while the pair of intermediate lugs 210 can be arranged in a position approximately centrally located between the two pairs of side lugs 220. Additionally, the pair of intermediate lugs 210 can be arranged slightly above the rear of the bucket, while the two pairs of side lugs 220 can be arranged slightly below the rear of the bucket.

[0030] In this article, directional terms such as "front," "back," "left," "right," "up," "down," "front," and "back" are used as references. Figure 4 The orientation of the working machinery and its attachments (bucket) is described as follows: the direction from the main body (working arm mechanism 500) of the working machinery to the bucket 200 is "front", and the opposite direction is "back"; the front facing is "front", and the back facing is "back"; the horizontal direction perpendicular to the front and back direction is "left" and "right"; the vertical direction perpendicular to the front and back direction is "up" and "down".

[0031] Return to reference Figure 6 Two of the two lateral ear plates 220 in each pair of lateral ear plates have lateral ear plates aligning with each other in the left-right direction for lateral pins 195 (see Figure 5 (This will be explained in more detail below) Through hole 221; the two intermediate lugs 210 of a pair of intermediate lugs also have lateral alignment for the intermediate pin 216 (see below) Figure 7 (This will be explained in more detail below) Through hole 211. Positioning portions 222 can be provided on the two opposing surfaces of the two side ear plates 220 in each pair of side ear plates. These positioning portions 222 can, for example, be in the form of... Figure 6 The disc-shaped portion shown serves two purposes: it reinforces the corresponding through-hole 221 (to prevent damage to the through-hole 221 from the force exerted by the side pin 195), and it also serves as a positioning element, as described in detail below, for defining the front-to-back position of the quick-change device 100 relative to the bucket 200. Disc-shaped portions 212 can also be provided on the two opposing surfaces of the pair of intermediate ear plates 210 to reinforce the through-hole 211 on the intermediate ear plates 210.

[0032] The above-described configuration of the bucket 200, including the side lugs 220 and the middle lugs 210, is a common configuration for conventional or ordinary buckets of loaders, and also a common configuration for other types of conventional or ordinary attachments of working machinery such as loaders.

[0033] In order to be compatible with the above-mentioned ordinary bucket 200, the quick-change device 100 of this utility model has been specially designed. Figure 5 An exemplary configuration of the quick-change device 100 is shown. For example... Figure 5 As shown, the quick-change device 100 includes a body 150, which is generally plate-shaped and has a front side and a rear side adapted to be connected to the bucket 200 of the loader and the main unit, respectively. Figure 5 What is seen here is the front side of the main body 150. On the rear side of the main body 150, an upper crossbeam 110, a lower crossbeam 120, and multiple back plates 130, 140, and other structural components can be fixed. The back plates 130 located on both sides in the left-right direction can be used to connect the quick-change device 100 to the boom 510 in the boom mechanism 500 of the loader, while the back plate 140 located in the middle in the left-right direction can be used to connect the quick-change device 100 to the tie rod 520 in the boom mechanism 500 (see...). Figure 4 For assembly with the bucket 200, the quick-change device 100 also includes two side hinge plates 170 and a central hinge plate 160 extending from the front of the main body 150, with the central hinge plate 160 located between the two side hinge plates 170. To achieve force balance, the two side hinge plates 170 can be arranged in a position approximately symmetrical to the left and right of the main body 150, while the central hinge plate 160 can be arranged in a position approximately centered between the two side hinge plates 170.

[0034] The intermediate hinge plate 160 includes a C-shaped hinge opening 161, which has a notch in the circumferential direction and is adapted to receive a pin through the notch. This pin is an intermediate pin 216 that, as described above, can pass through alignment through holes 211 of a pair of intermediate lugs 210 on the bucket 200. According to... Figure 5 In the non-limiting configuration shown, the notch of the C-shaped hinge opening 161 is located approximately at the top to facilitate reception and support of the intermediate pin 216. Optionally, reinforcements 162 may be fixed to the left and right sides of the C-shaped hinge opening 161 to reinforce it and prevent damage from the force exerted by the intermediate pin 216 when receiving it. The reinforcements 162 may also be C-shaped to match the shape of the C-shaped hinge opening 161, may be made of any suitable reinforcing material (such as Q355B low-alloy high-strength steel), and may be fixed to the vicinity of the C-shaped hinge opening 161, for example, by welding.

[0035] Reference Figure 7The intermediate pin 216 can be a separate component, which is always connected to the intermediate lug 210 and thus always connected to the bucket 200 via the through hole 211. In other embodiments, the intermediate pin 216 can also be an integral part of the bucket 200, for example, integrally formed with the intermediate lug 210. The shape of the intermediate pin 216 is not particularly limited, as long as it can be received into the C-shaped hinge opening 161 on the intermediate hinge plate 160 of the quick-change device 100. Advantageously, the cross-section of the intermediate pin 216 is at least partially arcuate, and the cross-section of the inner periphery of the C-shaped hinge opening 161 is also correspondingly arcuate.

[0036] Each side hinge plate 170 includes a hinge through hole 171 adapted to allow another pin to pass through, which is a side pin 195 as described above that can pass through the alignment through hole 221 of the pair of side ear plates 220 on the bucket 200.

[0037] Reference Figure 5 Two side pins 195 can always be mounted on the quick-change device 100 and pass through hinged through holes 171 on the corresponding side hinge plate 170 by movement. To hold and guide the movement of the side pins 195, the quick-change device 100 may also include two guide plates 180 extending from the front of the body 150, each guide plate 180 including a through hole through which a corresponding side pin 195 passes and guides its movement. In the illustrated embodiment, the quick-change device 100 also includes a bidirectional hydraulic cylinder 190 disposed on the front side of the body 150. The bidirectional hydraulic cylinder 190 has two cylinder rods 191 extending to the left and right sides, each side pin 195 disposed at the free end of a corresponding cylinder rod 191. In this way, by manipulating the bidirectional hydraulic cylinder 190, its two cylinder rods 191 automatically extend and retract. The side pin 195 located at the free end of the cylinder rod 191 can be automatically inserted and removed relative to the hinge through hole 171 on the side hinge plate 170 and the through hole 221 on the side ear plate 220 of the bucket 200, without the need for manual operation of the side pin 195 (although manual insertion and removal of the side pin 195 is also within the scope of this utility model). When the side pin 195 is located at the free end of the cylinder rod 191, the guide plate 180 can not only support the side pin 195 but also indirectly support the bidirectional hydraulic cylinder 190 via the side pin 195. Therefore, there is no need to set up a structure or device specifically for holding the bidirectional hydraulic cylinder 190 in the quick-change device 100.

[0038] Continue to refer to Figure 7 and 8The left-right positional relationship between the middle hinge plate 160 and the two side hinge plates 170 on the quick-change device 100 is designed to be the same as the left-right positional relationship between the pair of middle lugs 210 and the two pairs of side lugs 220 on the bucket 200. This allows the middle hinge plate 160 to extend between the pair of middle lugs 210 when the front of the quick-change device 100 is against the back of the bucket 200, and each side hinge plate 170 to extend between the corresponding pair of side lugs 220. In this way, the intermediate ear plates 210 can be hinged relative to the intermediate hinge plate 160 by receiving the intermediate pin 216 connecting the pair of intermediate ear plates 210 into the C-shaped hinge opening 161 on the intermediate hinge plate 160, and the side ear plates 220 can be hinged relative to the side hinge plate 170 by having each side pin 195 pass through the through hole 221 on the corresponding pair of side ear plates 220 and the hinge through hole 171 on the corresponding side hinge plate 170.

[0039] When extending each side hinge plate 170 between the corresponding pair of side lug plates 220, it is necessary to define the position of the side hinge plate 170 (or quick-change device 100) relative to the side lug plate 220 (or bucket 200) in the front-rear direction, so that the hinge through hole 171 on the side hinge plate 170 is aligned with the through hole 221 on the side lug plate 220, so as to facilitate the insertion and removal of the side pin 195. For this purpose, on the one hand, positioning portions 222 as described above can be provided on the two opposing surfaces of each pair of side lug plates 220; on the other hand, see especially... Figure 5 Bosses 172 can be provided on the left and right sides of the corresponding side hinge plate 170, wherein a limiting step portion 177 is provided on the boss 172. Figure 9 As shown in the enlarged view (where only the positioning portion 222 is shown for clarity, and its corresponding side ear plate 220 is removed), by abutting the positioning portion 222 against the limiting step portion 177, the position of the side ear plate 220 relative to the side hinge plate 170 can be limited, so that the through hole 221 on the side ear plate 220 is aligned with the hinge through hole 171 on the side hinge plate 170.

[0040] To ensure a secure abutment between the positioning portion 222 and the limiting step portion 177, the limiting step portion 177 may include a surface adapted to abut against the shape of the positioning portion 222. In the illustrated embodiment, the positioning portion 222 is disc-shaped, therefore the limiting step portion 177 may include an arcuate surface that abuts against the outer contour of the disc. Accordingly, as... Figure 5 and 7 As shown, the limiting step portion 177 can be provided on a fan-shaped portion of the entire boss 172.

[0041] In addition to the aforementioned fan-shaped portion, the boss 172 also includes a circular portion aligned with the hinge through hole 171 on the side hinge plate 170, and the circular portion is provided with a corresponding through hole 175 aligned with the hinge through hole 171, so that the side pin 195 can also pass through the boss 172 through the through hole 175.

[0042] In addition, such as Figure 5 As shown, the boss 172 may optionally include a ramp 176 disposed at its front end. When each side hinge plate 170 extends between the corresponding pair of side lugs 220, the ramp 176 is adapted to allow the boss 172 to avoid the positioning portion 222 on the corresponding side lug 220, so as to prevent the boss 172 from interfering with the positioning portion.

[0043] Industrial applicability

[0044] The quick-change device of this invention is suitable for use with various conventional or ordinary attachments in various types of machinery, facilitating the rapid replacement of various attachments. The following describes the usage of the quick-change device of this invention using the illustrated embodiment as an example.

[0045] First, connect the back of the quick-change device 100 to the main body of the loader (more specifically, the boom mechanism 500). Then, operate the boom mechanism 500 of the loader to bring the quick-change device 100 against the back of the bucket 200 placed on the ground. Next, hook the C-shaped hinge opening 161 on the middle hinge plate 160 of the quick-change device 100 onto the middle pin 216 on a pair of middle ear plates 210 of the bucket 200. Then, operate the boom mechanism 500 to adjust the angle of the quick-change device 100 so that each side hinge plate 170 of the quick-change device 100 is fitted between the corresponding pair of side ear plates 220 on the bucket 200, and aligns the hinge through hole 171 on the side hinge plate 170 with the through hole 221 on the side ear plate 220. Finally, operate the double-acting hydraulic cylinder 190 on the quick-change device 100, causing its two cylinder rods 191 to drive the corresponding side pins 195 through the alignment through holes of the assembled side hinge plate and side ear plate, thereby completing the assembly of the quick-change device 100 and the bucket 200. When changing the bucket, simply reverse the above steps to quickly remove the bucket 200 from the quick-change device 100.

[0046] The quick-change device of this utility model features a specific design for the connection structure of common attachments, enabling easy and quick assembly and disassembly of common attachments using a simple and reliable connection structure (mainly including a central hinge plate and side hinge plates, corresponding hinge openings / hinge through holes, and pins). This eliminates the need to design dedicated quick-change attachments, significantly saving development time and costs, and reducing the variety of attachments that need to be designed and manufactured. Furthermore, users of operating machinery do not need to purchase dedicated quick-change attachments; instead, they can replace various common attachments of different capacities with the same machine model, thus saving users on attachment procurement and storage costs.

[0047] Various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of this invention. Other embodiments of this invention will be apparent to those skilled in the art based on the practice of this invention disclosed in this specification. This specification and the examples disclosed herein should be considered illustrative only, and the true scope of this invention is defined by the appended claims and their equivalents.

Claims

1. A quick-change attachment device (100) for working machinery, comprising a main body (150), the front and rear sides of the main body being adapted to connect to an attachment (200) and a main unit of the working machinery, respectively, characterized in that, The attachment quick-change device also includes two side hinge plates (170) extending from the front of the main body (150) and an intermediate hinge plate (160) located between the two side hinge plates. Each side hinge plate (170) includes a hinge through hole (171) adapted to allow a side pin (195) capable of being connected to the attachment (200) to pass through. The intermediate hinge plate (160) includes a C-shaped hinge opening (161) adapted to receive an intermediate pin (216) that can be connected to the attachment (200).

2. The attachment quick-change device (100) according to claim 1, characterized in that, It also includes two guide plates (180) extending from the front of the body (150), each guide plate including a through hole through which a corresponding side pin (195) passes and guides the movement of the side pin.

3. The quick-change attachment device (100) according to claim 1, characterized in that, It also includes a bidirectional hydraulic cylinder (190) disposed on the front side of the main body (150), wherein each cylinder rod (191) of the bidirectional hydraulic cylinder is provided with a corresponding side pin (195) at its free end.

4. The attachment quick-change device (100) according to any one of claims 1 to 3, characterized in that, Each side hinge plate (170) has a boss (172) on its left and right sides, and the boss has a limiting step (177) for limiting the position of the attachment relative to the attachment quick-change device in the front-back direction.

5. The attachment quick-change device (100) according to claim 4, characterized in that, The limiting step portion (177) includes an arcuate surface adapted to abut against the positioning portion (222) on the attachment in a shape matching manner.

6. The attachment quick-change device (100) according to claim 4, characterized in that, The boss (172) includes a ramp (176) at its front end, the ramp being adapted to allow the boss to avoid the positioning portion (222) on the attachment so as to prevent the boss from interfering with the positioning portion.

7. The attachment quick-change device (100) according to any one of claims 1 to 3, characterized in that, Reinforcing members (162) for reinforcing the C-shaped hinge opening (161) are fixed on the left and right sides respectively.

8. An attachment assembly, characterized in that... The attachment includes an attachment (200) for working machinery and an attachment quick-change device (100) according to any one of claims 1 to 7, the attachment including two pairs of side lugs (220) extending from its rear side and a pair of intermediate lugs (210) located between the two pairs of side lugs, each side hinge plate (170) of the attachment quick-change device being fitted between the corresponding pair of side lugs (220) and hinged to the pair of side lugs by a corresponding side pin (195), the intermediate hinge plate (160) of the attachment quick-change device being fitted between the pair of intermediate lugs (210) and hinged to the pair of intermediate lugs by the intermediate pin (216).

9. The attachment assembly according to claim 8, characterized in that, The attachment (200) is a bucket.

10. A type of operating machinery, characterized in that... Includes the attachment components as described in claim 8 or 9.

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