A quick-release mechanism for a bucket and a variable capacity loader bucket

Abstract

This invention discloses a quick-release bucket mechanism and a variable-capacity loader bucket, applied to connect the bucket body and bucket side plates of different widths. It includes two fixed plates, two crossbars, and a hydraulic locking mechanism. By installing two fixed plates on the back of the bucket side plates and setting two crossbars between them, a stable docking space is formed. Simultaneously, a hydraulic locking mechanism is configured on the back of the bucket body. When the docking assembly enters this space, the locking heads on both sides can engage with the crossbars respectively, while the abutment plate is tightly pressed against the opposite side of the fixed plates, thereby achieving precise positioning and reliable fixation. This structure facilitates the quick replacement of bucket end plates of different widths, effectively solving the problems of traditional bucket side plates being unable to be replaced and capacity adjustment being inconvenient.

Description

Technical Field

[0001] This invention relates to the field of loader accessories technology, specifically to a quick-release bucket mechanism and a variable-capacity loader bucket. Background Technology

[0002] Loaders, as important earthmoving machinery, are widely used in construction, mining, ports, and other fields. Their main function is to load bulk materials such as soil, sand, gravel, lime, and coal using a bucket. As the core working component of the loader, the performance of the bucket directly affects the overall working efficiency and applicability of the machine.

[0003] Currently, most loader buckets on the market use a one-piece welded structure, meaning the bucket body is rigidly connected to the side plates on both sides as an inseparable whole. This traditional structure has the following obvious drawbacks: First, the bucket capacity is fixed. Since the bucket length (i.e., the width between the two side plates) is usually matched to the overall width of the loader, its loading capacity is determined at the initial design stage. In actual working conditions, when loading materials of different densities or volumes, the fixed bucket capacity cannot be flexibly adjusted, making it difficult to adapt to diverse operational needs and thus limiting further improvements in work efficiency. For example, when loading lightweight materials, the fixed bucket capacity may not fully utilize the vehicle's load-bearing capacity; while when handling heavy materials, the excessive capacity may easily lead to overloading.

[0004] Secondly, the fixed dimensions of traditional buckets result in poor maneuverability. In confined working environments such as narrow alleys and restricted warehouses, the large overall width of the bucket prevents it from smoothly reaching into the working face for material loading, thus preventing the loader from operating normally in these special conditions and greatly limiting its application range.

[0005] The key issue is the rigidity of the existing bucket structure, where the side plates are permanently connected to the bucket body, making quick disassembly and replacement impossible to meet specific needs. Changing the bucket capacity to suit different working conditions requires replacing the entire bucket, which is not only cumbersome and time-consuming but also increases the user's equipment purchase and maintenance costs. Summary of the Invention

[0006] To address the problems existing in the prior art, a quick-release bucket mechanism and a variable-capacity loader bucket are provided. By installing two fixing plates on the back of the bucket side plate and setting two crossbars between them, a stable docking space is formed. At the same time, a hydraulic locking mechanism is configured on the back of the bucket body. When the docking component enters this space, the locking heads on both sides can dock with the crossbars respectively, while the abutment plate is tightly attached to the opposite side of the fixing plate, thereby achieving precise positioning and reliable fixation. This structure facilitates the quick replacement of bucket end plates of different widths and effectively solves the problems of traditional bucket side plates being unable to be replaced and capacity adjustment being inconvenient.

[0007] To address the problems of existing technologies, this invention provides a quick-release bucket mechanism for connecting a bucket body and bucket side plates of different widths. The mechanism includes: two fixed plates arranged parallel to each other on the back side of the bucket side plates; two crossbars arranged parallel to each other between the two fixed plates, the length of which extends along the width direction of the bucket body; the two fixed plates and the two crossbars together forming a rectangular frame-like docking space; and a hydraulic locking mechanism located on the back side of the bucket body, having a docking assembly capable of extending into the docking space. The docking assembly has two opposing locking heads and two abutment plates respectively connected to the locking heads. The movement direction of the locking heads is perpendicular to the movement direction of the abutment plates. When the locking heads move opposingly to engage with the two crossbars, the abutment plates move simultaneously opposingly and abut against the opposing sides of the two fixed plates.

[0008] Preferably, the end of the clamp facing the crossbar is provided with a latch, and the opening size of the latch gradually increases from its inner bottom to its outer edge.

[0009] Preferably, the hydraulic locking mechanism further includes: a connecting frame, fixedly disposed on the back side of the bucket body, and having an extension seat extending along the width direction of the bucket body, wherein two locking heads are slidably mounted on the bottom of the extension seat in opposite directions; a locking hydraulic cylinder, laterally disposed inside the connecting frame, wherein its output rod extends into the extension seat; and a drive assembly, which is drively connected between the output rod of the locking hydraulic cylinder and the two locking heads; when the output rod of the locking hydraulic cylinder extends, the drive assembly drives the two locking heads to move in opposite directions.

[0010] Preferably, the drive assembly includes a drive base, which is fixedly connected to the output rod of the locking hydraulic cylinder; and a transmission link, whose two ends are respectively rotatably connected to the drive base and the chuck.

[0011] Preferably, a connecting seat is fixedly provided on the card head, and the connecting seat is slidably provided on the bottom of the extension seat; a connecting post is provided at the top of the connecting seat, and the end of the transmission connecting rod is rotatably connected to the connecting post.

[0012] Preferably, each of the card heads is connected to an abutment plate via a sloping sliding mechanism; when the card heads are driven to move in opposite directions, the sloping sliding mechanism converts the vertical movement of the card heads along the first direction into the horizontal movement of the abutment plates along the second direction perpendicular to the first direction, thereby causing the two abutment plates to extend out in opposite directions and press against the opposite sides of the two fixed plates.

[0013] Preferably, the inclined sliding mechanism includes a guide rail fixedly disposed on the abutment plate and a slider fixedly disposed on the connecting seat of the card head, wherein the slider and the guide rail slide obliquely together.

[0014] Preferably, the connection end between the bucket body and the bucket side plate is provided with a threaded hole, and the quick release mechanism also includes a threaded bolt. The bucket side plate is provided with a through hole corresponding to the threaded hole, and the threaded bolt passes through the through hole and is threadedly connected to the threaded hole.

[0015] A variable-capacity loader bucket includes a quick-release mechanism. The loader bucket includes a bucket body and bucket side plates. The bucket body is composed of a main bucket and an auxiliary bucket. The end of the main bucket is provided with a sliding channel extending along its width direction, and the end of the auxiliary bucket is provided with a sliding rod that slides with the sliding channel. A telescopic hydraulic cylinder is also provided on the back side of the bucket body. The output rod of the telescopic hydraulic cylinder is fixedly connected to the back side of the auxiliary bucket to drive the auxiliary bucket to extend or retract. The bucket side plates are installed on the end of the auxiliary bucket through the quick-release mechanism.

[0016] Preferably, a protective plate is provided on the inner side of the main bucket, and the two ends of the protective plate extend inward and cover the inner side of the auxiliary bucket.

[0017] The advantages of this application compared to the prior art are: This application creates a stable docking space by installing two fixing plates on the back of the bucket side plate and setting two crossbars between them. Simultaneously, a hydraulic locking mechanism is installed on the back of the bucket body. When the docking assembly enters this space, the locking heads on both sides engage with the crossbars, while the abutment plate fits tightly against the opposite side of the fixing plates, thus achieving precise positioning and reliable fixation. This structure facilitates quick replacement of bucket end plates of different widths, effectively solving the problems of traditional bucket side plates being unable to be replaced and inconvenient capacity adjustment. Attached Figure Description

[0018] Figure 1 This is a perspective view of a bucket quick-release mechanism of the present invention connecting the bucket body and the bucket end plate.

[0019] Figure 2 This is a schematic diagram of a quick-release mechanism for a bucket connected to the bucket end plate according to the present invention.

[0020] Figure 3This is a perspective view of a bucket quick-release mechanism of the present invention from a first-view perspective.

[0021] Figure 4 This is a partial exploded perspective view of a bucket quick-release mechanism according to the present invention.

[0022] Figure 5 This is a top view of a bucket quick-release mechanism according to the present invention.

[0023] Figure 6 This is a top view of a bucket quick-release mechanism of the present invention in the unlocked state.

[0024] Figure 7 This is a top view of a bucket quick-release mechanism of the present invention in the unlocked state.

[0025] Figure 8 This is a perspective view of the bucket quick-release mechanism of the present invention in the unlocked state from a first-view perspective.

[0026] Figure 9 This is a perspective view of a bucket quick-release mechanism of the present invention in an unlocked state from a second perspective.

[0027] Figure 10 This is a 3D view of a variable-capacity loader bucket.

[0028] The following are the labels in the diagram: 1. Bucket body; 11. Main bucket; 12. Secondary bucket; 121. Sliding rod; 2. Bucket side plate; 3. Fixing plate; 4. Crossbar; 41. Connecting assembly; 411. Collet; 4111. Bayonet; 4112. Connecting seat; 4113. Connecting column; 412. Abutment plate; 42. Connecting frame; 421. Extension seat; 43. Locking hydraulic cylinder; 441. Drive seat; 442. Transmission connecting rod; 451. Guide rail; 452. Slider; 5. Threaded bolt; 6. Telescopic hydraulic cylinder; 7. Protective plate. Detailed Implementation

[0029] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1-5As shown, a quick-release bucket mechanism is used to connect a bucket body 1 and bucket side plates 2 of different widths. It includes: two fixed plates 3, parallelly arranged on the back side of the bucket side plates 2; two crossbars 4, parallelly arranged between the two fixed plates 3, with the length of the two crossbars 4 extending along the width direction of the bucket body 1; the two fixed plates 3 and the two crossbars 4 together forming a rectangular frame-like docking space; and a hydraulic locking mechanism, located on the back side of the bucket body 1, having a docking assembly 41 capable of extending into the docking space. The docking assembly 41 has two opposing locking heads 411 and two abutment plates 412 respectively pulsively connected to the locking heads 411. The moving direction of the locking heads 411 is perpendicular to the moving direction of the abutment plates 412. When the locking heads 411 move opposingly to engage with the two crossbars 4, the abutment plates 412 simultaneously move opposingly and abut against the opposing sides of the two fixed plates 3.

[0031] When the bucket side plate 2 needs to be installed, operate the hydraulic locking mechanism to retract its docking assembly 41. Align the fixed frame assembly on the back of the bucket side plate 2 with the hydraulic locking mechanism on the back of the bucket body 1, allowing the front end of the docking assembly 41 to enter the rectangular docking space formed by the fixed plate 3 and the crossbar 4. Then, issue a locking command to the hydraulic locking mechanism, and the hydraulic drive mechanism starts working, pushing the two locking heads 411 inside the docking assembly 41 to move back and forth horizontally until the locking heads 411 are firmly locked onto the two crossbars 4. While the locking heads 411 are moving, through the internal linkage transmission mechanism, the two abutment plates 412 move back and forth vertically, finally abutting tightly against the opposing sides of the two fixed plates 3. Through the locking heads 411 and the crossbars 4, and the abutment plates 412 and the fixed plates 3, the bucket side plate 2 is precisely positioned and multi-dimensionally constrained in the horizontal and vertical directions, thus completing the rigid connection between the bucket side plate 2 and the bucket body 1. The disassembly process is the reverse: by operating the hydraulic locking mechanism to release the constraints of the clamp 411 and the abutment plate 412, the bucket side plate 2 can be removed.

[0032] This makes changing bucket side plates 2 of different widths quick and easy, significantly improving work efficiency and solving the problems of traditional bucket side plates 2 not being able to be changed quickly and bucket capacity adjustment being inconvenient. At the same time, this connection method provides stable docking rigidity and precise positioning, ensuring the reliability and safety of the bucket connection under heavy-load operation.

[0033] like Figure 8 and Figure 9 As shown, the end of the clip 411 facing the crossbar 4 is provided with a slot 4111, and the opening size of the slot 4111 gradually increases from its inner bottom to its outer edge.

[0034] When it is necessary to install the bucket side plate 2, operate the hydraulic locking mechanism to retract its docking assembly 41. Align the fixing frame assembly on the back of the bucket side plate 2 with the hydraulic locking mechanism on the back of the bucket body 1, so that the front end of the docking assembly 41 can enter the rectangular docking space formed by the fixing plate 3 and the crossbar 4. During this process, even if there is a slight misalignment, the crossbar 4 will first contact the gradually expanding guide slot 4111 at the end of the slot 411, and automatically slide into the bottom of the slot 4111 under the guidance of its flared slope, completing the initial radial positioning.

[0035] The gradually expanding guide bayonet 4111 structure at the end of the bayonet head 411 plays a crucial role in self-guidance and fault compensation, effectively reducing the stringent requirements for initial docking accuracy, making operation easier, and further improving the replacement speed and operating experience.

[0036] like Figure 2 and Figure 3 As shown, the hydraulic locking mechanism also includes a connecting frame 42, which is fixedly disposed on the back side of the bucket body 1 and has an extension seat 421 extending along the width direction of the bucket body 1. Two locking heads 411 are slidably mounted on the bottom of the extension seat 421 in opposite directions. A locking hydraulic cylinder 43 is laterally disposed inside the connecting frame 42, and its output rod extends into the extension seat 421. A drive assembly is drively connected between the output rod of the locking hydraulic cylinder 43 and the two locking heads 411. When the output rod of the locking hydraulic cylinder 43 extends, the drive assembly will drive the two locking heads 411 to move in opposite directions.

[0037] The hydraulic locking mechanism provides the power and execution function for docking. This mechanism includes a housing structure fixed to the back side of the bucket body 1 via a connecting frame 42. The connecting frame 42 has an extension seat 421 extending along the width direction of the bucket body 1, and two locking heads 411 are slidably mounted in the bottom guide groove of the extension seat 421. A locking hydraulic cylinder 43 is laterally disposed at the internal center of the connecting frame 42, and its output rod extends horizontally into the extension seat 421. A drive assembly is provided between the output rod and the two locking heads 411, which converts the lateral linear motion of the locking hydraulic cylinder 43's output rod into the opposing linear motion of the two locking heads 411. Specifically, the transmission method can be that a wedge block is provided at the end of the output rod as the drive assembly, and each locking head 411 has a roller or slider 452 on its inner side that engages with the inclined surface of the wedge block. When the output rod of the locking hydraulic cylinder 43 extends, the wedge block moves forward, and the inclined surfaces on both sides force the two chucks 411 to move in opposite directions along the guide groove.

[0038] Oil is supplied to the locking hydraulic cylinder 43, causing its output rod to extend. The output rod pushes the drive assembly (such as a wedge block), thereby decomposing the horizontal thrust into two forces in opposite directions, driving the two clamps 411 to move precisely in opposite directions along the guide groove at the bottom of the extension seat 421 until the clamps 411 are securely engaged with the two crossbars 4.

[0039] like Figure 5 and Figure 6 As shown, the drive assembly includes a drive base 441, which is fixedly connected to the output rod of the locking hydraulic cylinder 43; and two transmission links 442, the two ends of which are rotatably connected to the drive base 441 and the chuck 411, respectively.

[0040] One end of each of the two transmission links 442 is rotatably connected to the left and right sides of the drive seat 441 via a first rotating shaft, and the other end is rotatably connected to the upper inner side of the corresponding chuck 411 via a second rotating shaft. When the output rod of the locking hydraulic cylinder 43 extends or retracts, it drives the drive seat 441 to move back and forth. Then, through the pushing and pulling action of the two transmission links 442, the linear motion of the drive seat 441 is converted into precise and synchronous back-to-back or front-to-back movement of the two chucks 411 in the guide groove.

[0041] Oil is supplied to the locking hydraulic cylinder 43, causing its output rod to extend and push the drive seat 441 forward. When the drive seat 441 moves forward, it pushes the two locking heads 411 to both sides through the two transmission connecting rods 442, forcing the locking heads 411 to move precisely and synchronously in opposite directions along the guide groove until the locking heads 411 are firmly locked onto the two crossbars 4.

[0042] The single linear output of the locking hydraulic cylinder 43 is efficiently and reliably converted into the symmetrical linear motion of the two chucks 411, ensuring a balanced distribution of locking force. Moreover, by utilizing the dead point characteristics or over-center capability of the connecting rod, a self-locking effect can be formed in the locking position, which greatly enhances the impact resistance reliability in the locking state. Even if the hydraulic system experiences pressure relief, the connection can remain stable.

[0043] like Figure 5 and Figure 6 As shown, a connecting seat 4112 is fixedly provided on the card head 411, and the connecting seat 4112 is slidably provided at the bottom of the extension seat 421; a connecting post 4113 is provided at the top of the connecting seat 4112, and the end of the transmission connecting rod 442 is rotatably connected to the connecting post 4113.

[0044] A connecting post 4113 extends upward from the top of the connecting seat 4112. One end of each of the two transmission links 442 is rotatably connected to the left and right sides of the drive seat 441 via a first rotating shaft, and the other end is rotatably connected to the connecting post 4113 on the connecting seat 4112 of the corresponding clamp 411 via a second rotating shaft. When the output rod of the locking hydraulic cylinder 43 extends or retracts, it drives the drive seat 441 to move back and forth. Then, through the pushing and pulling action of the two transmission links 442, the linear motion of the drive seat 441 is converted into precise and synchronous opposite or opposite movement of the two connecting seats 4112 and the clamp 411 in the guide groove.

[0045] like Figures 6-8 As shown, each of the card heads 411 is connected to an abutment plate 412 via a sloping sliding mechanism; when the card heads 411 are driven to move in opposite directions, the sloping sliding mechanism converts the vertical movement of the card heads 411 into the horizontal movement of the abutment plates 412, thereby causing the two abutment plates 412 to extend out in opposite directions and press against the opposite sides of the two fixed plates 3.

[0046] When the bucket side plate 2 needs to be installed, the hydraulic system is operated to retract the output rod of the locking hydraulic cylinder 43. The output rod drives the drive seat 441 to move backward. The drive seat 441 pulls the connecting seat 4112 above the two clamps 411 through two transmission links 442, causing the connecting seat 4112 to slide towards each other along the guide groove at the bottom of the extension seat 421, thereby driving the clamps 411 to retract to the unlocked position. During this process, the opposite movement of the clamps 411 is simultaneously driven by the inclined sliding mechanism to move the two abutment plates 412 in a vertical opposite direction and retract them. Align the fixed frame assembly on the back of the bucket side plate 2 with the hydraulic locking mechanism, so that the extension seat 421 and the clamps 411 enter the rectangular docking space. During this process, the crossbar 4 automatically slides into the bottom of the gradually expanding guide slot 4111 at the end of the clamp 411 under the inclined surface guidance, completing the initial positioning. Then, oil is supplied to the locking hydraulic cylinder 43, causing its output rod to extend and push the drive seat 441 forward. When the drive seat 441 moves forward, it pushes the connecting seat 4112 to both sides through two transmission links 442, forcing the connecting seat 4112 to drive the locking head 411 to move precisely and synchronously in opposite directions along the horizontal guide groove until the locking head 411 is firmly locked onto the two crossbars 4. Simultaneously with the horizontal movement of the locking head 411, the inclined sliding mechanism connecting the locking head 411 and the abutment plate 412 converts the horizontal movement of the locking head 411 into the vertical movement of the abutment plate 412, driving the two abutment plates 412 to extend synchronously in opposite directions, ultimately abutting tightly against the opposing sides of the two fixed plates 3. Through the horizontal locking of the locking head 411 to the crossbar 4 and the vertical abutment of the abutment plate 412 to the fixed plate 3, a multi-dimensional rigid locking of the bucket side plate 2 in space is achieved. The disassembly process is the reverse of the above steps.

[0047] like Figures 6-8 As shown, the inclined sliding mechanism includes a guide rail 451 fixedly mounted on the abutment plate 412 and a slider 452 fixedly mounted on the connecting seat 4112 of the card head 411. The slider 452 and the guide rail 451 slide obliquely together.

[0048] When the bucket side plate 2 needs to be installed, the hydraulic system is operated to retract the output rod of the locking hydraulic cylinder 43. The output rod drives the drive seat 441 to retract, and the drive seat 441 pulls the connecting seat 4112 above the two clamps 411 through two transmission connecting rods 442, causing the connecting seat 4112 to slide towards each other along the guide groove at the bottom of the extension seat 421, thereby driving the clamps 411 to retract horizontally inward to the unlocked position. During this process, the towards-facing movement of the clamps 411 forces the slider 452 fixed on its connecting seat 4112 to slide along the inclined guide rail 451 fixed on the abutment plate 412, thereby synchronously driving the two abutment plates 412 to move towards each other vertically and retract. Align the fixed frame assembly on the back side of the bucket side plate 2 with the hydraulic locking mechanism, so that the extension seat 421 and the clamps 411 enter the rectangular docking space. During this process, the crossbar 4 automatically slides into the bottom of the clamp 4111 under the inclined surface of the gradually expanding guide slot 4111 at the end of the clamp 411, completing the initial positioning. Subsequently, oil is supplied to the locking hydraulic cylinder 43, causing its output rod to extend and push the drive seat 441 forward. As the drive seat 441 moves forward, it pushes the connecting seats 4112 to both sides through the two transmission connecting rods 442, forcing the connecting seats 4112 to drive the clamping head 411 to move precisely and synchronously in opposite directions along the horizontal guide groove until the clamping head 411 is firmly engaged with the two crossbars 4. While the clamping head 411 moves horizontally outward, the slider 452 fixed on the connecting seat 4112 slides along the inclined guide rail 451 on the abutment plate 412, converting the horizontal movement of the clamping head 411 into the vertical downward movement of the abutment plate 412, driving the two abutment plates 412 to extend synchronously in opposite directions, and finally tightly abutting against the opposing sides of the two fixed plates 3.

[0049] like Figure 2 As shown, the connection end between the bucket body 1 and the bucket side plate 2 is provided with a threaded hole. The quick release mechanism also includes a threaded bolt 5. The bucket side plate 2 is provided with a through hole corresponding to the threaded hole. The threaded bolt 5 passes through the through hole and is threadedly connected to the threaded hole.

[0050] To ensure connection strength, especially under long-term heavy-duty conditions, threaded bolts 5 can be passed through the through holes on the bucket side plate 2 and screwed into the threaded holes at the end of the bucket body 1 and tightened, thus forming an independent mechanical safety redundancy. Disassembly requires first unscrewing all threaded bolts 5, and then operating the hydraulic system to unlock.

[0051] like Figure 1 and Figure 10As shown, a variable capacity loader bucket includes a bucket quick-release mechanism. The loader bucket includes a bucket body 1 and a bucket side plate 2. The bucket body 1 is composed of a main bucket 11 and a secondary bucket 12. The end of the main bucket 11 is provided with a sliding channel extending along its width direction, and the end of the secondary bucket 12 is provided with a sliding rod 121 that slides with the sliding channel. The back side of the bucket body 1 is also provided with a telescopic hydraulic cylinder 6. The output rod of the telescopic hydraulic cylinder 6 is fixedly connected to the back side of the secondary bucket 12 to drive the secondary bucket 12 to extend or retract. The bucket side plate 2 is installed at the end of the secondary bucket 12 through the bucket quick-release mechanism.

[0052] For routine capacity variation requirements, the operator does not need to disassemble any parts. Simply control the telescopic hydraulic cylinder 6 from the cab to drive the auxiliary bucket 12 to extend or retract, and the overall width of the bucket can be continuously and steplessly adjusted, thereby changing its capacity to adapt to different operating scenarios from light materials to heavy materials, and from loose stacks to compact stacks.

[0053] When a significant capacity change is required, or when the bucket side plate 2 is worn and needs replacement, or when it needs to be replaced with a special function side plate (such as a rock tooth sleeve), the quick-release function is activated. First, operate the hydraulic locking mechanism to retract the chuck 411 and the abutment plate 412, releasing the lock on the bucket side plate 2, allowing the old side plate to be removed. Then, align the new bucket side plate 2 with the hydraulic locking mechanism at the end of the sub-bucket 12 via the fixing frame assembly on its back, and operate to lock it. Finally, the sub-bucket 12 can be adjusted to the appropriate position and locked using the telescopic hydraulic cylinder 6, depending on the width of the new bucket side plate. For ultimate reliability, the auxiliary threaded bolt 5 can be tightened as described above.

[0054] like Figure 10 As shown, a protective plate 7 is provided on the inner side of the main bucket 11, and the two ends of the protective plate 7 extend inward and cover the inner side of the auxiliary bucket 12.

[0055] To prevent material leakage during operation from the joint between the main bucket 11 and the auxiliary bucket 12, particularly the assembly gap between the sliding rod 121 and the sliding channel, a protective plate 7 is provided on the inner side of the main bucket 11 (i.e., the surface in contact with the material). This protective plate 7 is fixed to the main bucket 11 and located inside the joint between the main bucket 11 and the auxiliary bucket 12. Both ends of the protective plate 7 extend inwards (towards the center of the bucket) at the bucket width direction, forming a wing structure that fully covers the front of the inner wall of the auxiliary bucket 12. Thus, regardless of whether the auxiliary bucket 12 is extended or retracted, the protective plate 7 can continuously and effectively block the internal movement gap, forming a continuous protective surface.

[0056] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A quick-release mechanism for a bucket, used to connect the bucket body and bucket side plates of different widths, characterized in that, include: Two fixing plates are set parallel to each other on the back side of the bucket side plate; Two horizontal bars are set parallel between two fixed plates. The length of the two horizontal bars extends along the width of the bucket body. The two fixed plates and the two horizontal bars together form a rectangular frame-like docking space. A hydraulic locking mechanism is located on the back side of the bucket body. It has a docking assembly that can extend into the docking space. The docking assembly has two opposing locking heads and two abutment plates that are respectively drivenly connected to the locking heads. The movement direction of the locking heads is perpendicular to the movement direction of the abutment plates. When the locking heads move opposingly to engage with the two crossbars, the abutment plates move simultaneously opposingly and abut against the opposing sides of the two fixed plates. The hydraulic locking mechanism also includes, A connecting frame is fixedly installed on the back side of the bucket body and has an extension seat extending along the width direction of the bucket body. Two clips are slidably installed on the bottom of the extension seat in opposite directions. A locking hydraulic cylinder is horizontally positioned inside the connecting frame, with its output rod extending into the extension seat; The drive assembly is connected in transmission between the output rod of the locking hydraulic cylinder and the two clamps; When the output rod of the locking hydraulic cylinder extends, the drive assembly will drive the two chucks to move in opposite directions; The driver components include: The drive unit is fixedly connected to the output rod of the locking hydraulic cylinder; A transmission link is rotatably connected at both ends to a drive seat and a clamp head, respectively. A connecting seat is fixedly mounted on the clamp head and slidably mounted at the bottom of the extension seat. A connecting post is mounted at the top of the connecting seat, and the end of the transmission link is rotatably connected to the connecting post. Each clamp head is connected to an abutment plate through an inclined sliding mechanism. When the clamp heads are driven to move in opposite directions, the inclined sliding mechanism converts the vertical movement of the clamp heads into the horizontal movement of the abutment plates, thereby causing the two abutment plates to extend in opposite directions and press against the opposite sides of the two fixed plates.

2. The quick-release mechanism for a bucket according to claim 1, characterized in that, The end of the clamp facing the crossbar is provided with a latch, and the opening size of the latch gradually increases from its inner bottom to its outer edge.

3. The quick-release mechanism for a bucket according to claim 1, characterized in that, The inclined sliding mechanism includes a guide rail fixedly mounted on the abutment plate and a slider fixedly mounted on the connecting seat of the card head, wherein the slider and the guide rail slide obliquely together.

4. A quick-release bucket mechanism according to claim 1 or 2, characterized in that, The connection end between the bucket body and the bucket side plate is provided with a threaded hole. The quick release mechanism also includes a threaded bolt. The bucket side plate is provided with a through hole corresponding to the threaded hole. The threaded bolt passes through the through hole and is threadedly connected to the threaded hole.

5. A variable capacity loader bucket, characterized in that, The loader bucket includes a quick-release mechanism as described in claim 1 or 2; the loader bucket includes a bucket body and a bucket side plate, the bucket body is composed of a main bucket and an auxiliary bucket, the end of the main bucket is provided with a sliding channel extending along its width direction, and the end of the auxiliary bucket is provided with a sliding rod that slides with the sliding channel; the back side of the bucket body is also provided with a telescopic hydraulic cylinder, the output rod of the telescopic hydraulic cylinder is fixedly connected to the back side of the auxiliary bucket to drive the auxiliary bucket to telescopic; the bucket side plate is installed at the end of the auxiliary bucket through the quick-release mechanism.

6. A variable capacity loader bucket according to claim 5, characterized in that, The main bucket has a protective plate on its inner side, and both ends of the protective plate extend inward and cover the inner side of the auxiliary bucket.

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