Switching mechanism

Abstract

The switching mechanism is connected between a machine tool and a working connecting rod and comprises a bottom plate, a bent plate used for being connected with the machine tool in a clamped mode is fixed to the upper end of the bottom plate, a middle hinged plate used for being hinged to a pull rod of the working connecting rod is fixed to the middle of the bottom plate, and the two ends of the bottom plate are each provided with a side hinged plate I and a side hinged plate II which are parallel to each other; the lower ends of the side hinging plate I and the side hinging plate II are hinged with a movable arm of a working connecting rod; the bottom plate is further provided with a quick-change assembly, the quick-change assembly comprises a hydraulic oil cylinder, a rotating shaft and two telescopic mechanisms, the rotating shaft is hinged to the hydraulic oil cylinder and the two telescopic mechanisms respectively, and the telescopic mechanisms can penetrate through the bottom plate to be inserted into positioning holes of a machine tool, so that the conversion mechanism is connected with the machine tool.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a conversion mechanism for connecting a working machine. Background Art

[0002] With the continuous development of loaders and the continuous expansion of the scope of use, users require that the same loader can adapt to different working conditions, install different accessories, complete multiple operations, and achieve multiple uses without increasing costs. For example, the same loader can be installed with a bucket, clamp, sweeper, and snow remover. However, the existing conversion mechanism requires manual operation of the wrench to move the positioning pin downward into the bucket positioning hole, which has low work efficiency and low accuracy. In order to meet the requirements, a conversion mechanism is designed that can quickly, effectively, and safely replace accessories. Summary of the invention

[0003] In order to solve the technical problems existing in the prior art, the present application provides a conversion mechanism connected between a machine and a working connecting rod, comprising a base plate, a bent plate for clamping with the machine is fixed on the upper end of the base plate, an intermediate hinged plate for hingedly connected to the pull rod of the working connecting rod is fixed in the middle of the base plate, and side hinged plates I and side hinged plates II are provided at both ends of the base plate in parallel with each other, and the lower ends of the side hinged plates I and the side hinged plates II are hinged to the movable arm of the working connecting rod; a quick-change assembly is also provided on the base plate, and the quick-change assembly comprises a hydraulic cylinder, a rotating shaft and two telescopic mechanisms, and the rotating shaft is respectively hinged to the hydraulic cylinder and the two telescopic mechanisms, and the telescopic mechanism can pass through the base plate and be inserted into the positioning hole of the machine to realize the connection between the conversion mechanism and the machine.

[0004] Furthermore, the two ends of the rotating shaft are rotatably connected to the two side hinged plates I respectively, and the rotating shaft is provided with a first rotating block hinged to the hydraulic cylinder and a second rotating block hinged to the telescopic mechanism.

[0005] Furthermore, the first rotating block and the second rotating block are circumferentially fixedly connected to the rotating shaft.

[0006] Furthermore, an included angle between the first rotating block and the second rotating block is 45° to 90°.

[0007] Furthermore, the telescopic mechanism includes a connecting shaft, a positioning pin and a positioning pin sleeve, the connecting shaft is hinged to the second rotating block, the positioning pin is hinged to the connecting shaft, and the positioning pin sleeve is fixed to the bottom plate through a sealing plate and slidably cooperates with the positioning pin.

[0008] Furthermore, an elastic element is sleeved on the connecting shaft, and two ends of the elastic element abut against the second rotating block and the connecting shaft respectively, wherein the contact surface between the second rotating block and the elastic element is a progressive curved surface.

[0009] Furthermore, a limiting block is fixed on the side hinge plate 1, and the bottom of the limiting block extends downward to achieve positioning of the machine, so that the positioning pin can be aligned with the positioning hole of the machine.

[0010] Furthermore, coaxial through holes are provided on the upper parts of the middle hinge plate, the side hinge plate I and the side hinge plate II, and the rotating shaft passes through the middle hinge plate and the side hinge plate II, and is rotatably connected to the side hinge plate I through a supporting sleeve.

[0011] Furthermore, coaxial hinge holes are provided at the lower parts of the side hinged plate I and the side hinged plate II, and the movable arm of the working connecting rod is rotatably connected to the side hinged plate I and the side hinged plate II through a flange.

[0012] Furthermore, a round tube is fixedly connected between the two side hinged plates II.

[0013] Compared with the prior art, the beneficial effects of this application are: 1. The conversion mechanism of the present application is connected to the upper end of the machine by a bent plate, and the telescopic mechanism is controlled by a hydraulic cylinder to connect or separate with the lower end of the machine, which shortens the time required for machine replacement, significantly improves work efficiency, and provides a strong guarantee for efficient and continuous operation. At the same time, it enhances the versatility and adaptability of the operating machinery, enabling it to quickly respond to various complex operating scenarios and machine requirements.

[0014] 2. The conversion mechanism of this embodiment drives the positioning pins of the two telescopic mechanisms synchronously through the hydraulic cylinder, so that they can simultaneously and synchronously complete the extension and retraction actions, achieve a high degree of consistency in the positioning pin actions, and ensure the accuracy and stability during the tool replacement process. At the same time, the structure of the conversion mechanism is simplified, saving manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation of the conversion mechanism of this application; Figure 2 This is a schematic diagram of the structure of the conversion mechanism of this application; Figure 3 This is a schematic diagram of the structure of the conversion mechanism of this application; Figure 4 This is a schematic diagram of the structure of the telescopic mechanism of the present application; In the figure: 1. bucket; 2. conversion mechanism; 3. pull rod; 4. rocker arm; 5. boom; 6. bottom plate; 7. bent plate; 8. side hinge plate I; 9. side hinge plate II; 10. first rotating block; 11. hydraulic cylinder; 12. middle hinge plate; 13. rotating shaft; 14. supporting sleeve; 15. second rotating block; 16. connecting shaft; 17. elastic element; 18. locating pin; 19. locating pin sleeve; 20. limit block; 21. sealing plate; 22. flange; 23. round tube; 24. hydraulic oil pipe. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] The present application is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect defined in this way can be combined with any other aspect or aspects, unless it is clearly stated that it cannot be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0018] In the description of the present application, it should be understood that the terms "inside", "outside", "up", "down", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present application.

[0019] refer to Figure 1 to Figure 2As shown, the present application discloses a conversion mechanism, which is connected between the machine and the working link, and includes a bottom plate 6 and a bent plate 7, and the bent plate 7 is welded and fixed to the upper end of the bottom plate 6. The left and right ends of the bottom plate 6 are welded with a side hinge plate I8 and a side hinge plate II9, and the upper ends of the side hinge plate I8 and the side hinge plate II9 extend to the bent plate 7 and are fixed to the bent plate 7 by welding. The side hinge plate I8 and the side hinge plate II9 are parallel to each other and perpendicular to the bottom plate 6, and the bottoms of the two side hinge plates II9 are welded and fixed by a round tube 23. An intermediate hinge plate 12 for hinged connection with the pull rod 3 of the working link is fixed in the middle of the bottom plate 6, the upper part of the intermediate hinge plate 12 is welded to the bent plate 7, the middle part is welded to the bottom plate 6, and the bottom of the intermediate hinge plate 12 is welded to the round tube 23. This connection method improves the structural strength and stability of the conversion mechanism, and can ensure that the conversion mechanism remains stable when subjected to heavy loads and complex working conditions. The round tube 23 provides additional support for the side hinge plate II9, further improving the stability of the entire conversion mechanism.

[0020] In some embodiments, the middle of the middle hinge plate 12 protrudes outward to form a hinged portion that is hinged to the pull rod 3 of the working link. The hinged portion is provided with two coaxial hinge holes, and the hinge holes cooperate with the pins to be hinged to the pull rod 3 of the working link. Coaxial hinge holes are provided at the lower parts of the side hinge plates I8 and II9, and the movable arm 5 of the working link is rotatably connected to the side hinge plates I8 and II9 through the flange 22.

[0021] In some embodiments, a quick-change assembly is also provided on the bottom plate 6, and the quick-change assembly includes a hydraulic cylinder 11, a rotating shaft 13 and two telescopic mechanisms. The rotating shaft 13 is respectively hinged with the hydraulic cylinder 11 and the two telescopic mechanisms. When the hydraulic cylinder 11 telescopes, the two telescopic mechanisms are driven up and down by the rotating shaft 13. When connected, the bent plate 7 at the top of the conversion mechanism is inserted into the limit plate groove of the machine tool to achieve the clamping connection with the machine tool, and the hydraulic cylinder 11 drives the telescopic mechanism to move downward, passes through the bottom plate 6 and is inserted into the positioning hole of the machine tool, thereby realizing the connection between the conversion mechanism and the machine tool.

[0022] The conversion mechanism of this embodiment is connected to the upper end of the tool by the bending plate 7, and the telescopic mechanism is controlled by the hydraulic cylinder 11 to connect or separate with the lower end of the tool, which shortens the time required for tool replacement, significantly improves work efficiency, and provides a strong guarantee for efficient and continuous operation. At the same time, the versatility and operational adaptability of the conversion mechanism are enhanced, so that it can quickly respond to various complex operating scenarios and tool requirements.

[0023] In some embodiments, coaxial through holes are provided on the upper parts of the middle hinge plate 12, the side hinge plate I8 and the side hinge plate II9, and the rotating shaft 13 passes through the middle hinge plate 12 and the side hinge plate II9, and the two ends of the rotating shaft 13 are rotatably connected to the two side hinge plates I8 through support sleeves 14 respectively.

[0024] In some embodiments, a first rotating block 10 hinged to the hydraulic cylinder 11 and two second rotating blocks 15 hinged to the telescopic mechanism are provided on the rotating shaft 13. The first rotating block 10 and the second rotating block 15 are circumferentially fixedly connected to the rotating shaft 13 so that the first rotating block 10 and the second rotating block 15 can rotate coaxially with the rotating shaft 13.

[0025] There are many options for the specific connection method between the first rotating block 10 and the second rotating block 15 and the rotating shaft 13. For example, the rotating shaft 13 is provided with a threaded hole perpendicular to its axis, and the bottom of the first rotating block 10 and the second rotating block 15 is provided with a through hole corresponding to the threaded hole. The first rotating block 10 and the second rotating block 15 are sleeved on the rotating shaft 13, and then screwed into the threaded hole of the rotating shaft 13 through bolts through the through holes, so as to realize the circumferential fixed connection between the first rotating block 10 and the second rotating block 15 and the rotating shaft 13. The angle between the first rotating block 10 and the second rotating block 15 can be selected according to actual needs. Preferably, the angle between the first rotating block 10 and the second rotating block 15 is 45° to 90°.

[0026] In some embodiments, reference Figure 3-4 As shown, the telescopic mechanism is arranged between the side hinge plate I8 and the side hinge plate II9, and includes a connecting shaft 16, a locating pin 18 and a locating pin sleeve 19. The top end of the connecting shaft 16 is hinged to the second rotating block 15 through a pin, and the lower end of the connecting shaft 16 is hinged to the locating pin 18 through a pin. The locating pin sleeve 19 is sleeved on the outside of the locating pin 18 and slidably cooperates with the locating pin 18. The locating pin sleeve 19 is fixed to the bottom plate 6 through a sealing plate 21, and the lower end of the locating pin sleeve 19 extends downward through the bottom plate 6. The conversion mechanism of this embodiment synchronously drives the locating pins 18 of the two telescopic mechanisms through the hydraulic cylinder 11. It enables them to complete the extension and retraction actions simultaneously and synchronously, realizes the high consistency of the action of the locating pin 18, and ensures the accuracy and stability during the tool replacement process. At the same time, the structure of the conversion mechanism is simplified, saving manufacturing costs.

[0027] In some embodiments, an elastic element 17 is sleeved on the connecting shaft 16, and preferably, the elastic element 17 is a spring. The two ends of the elastic element 17 abut against the second rotating block 15 and the connecting shaft 16 respectively, wherein the contact surface between the second rotating block 15 and the elastic element 17 is a progressive curved surface. When the piston rod of the hydraulic cylinder 11 retracts, the rotating shaft 13 is driven counterclockwise by the first rotating block 10, and the second rotating block 15 drives the positioning pin 18 to extend downward through the connecting shaft 16. At the same time, the progressive curved surface of the second rotating block 15 compresses the elastic element 17, and the elastic element 17 acts on the rebound force of the second rotating block 15, providing a reset force for the positioning pin 18, ensuring that the positioning pin 18 can remain in a retracted state when not affected by external forces.

[0028] In some embodiments, a limit block 20 is fixed on the side hinge plate 18, and the bottom of the limit block 20 extends downward to achieve positioning of the machine, so that the positioning pin 18 can be aligned with the positioning hole of the machine, thereby improving the accuracy and efficiency of the connection.

[0029] The process of replacing the bucket: the driver manipulates the boom 5, rocker arm 4 and tie rod 3 of the working linkage system to drive the conversion mechanism 2 to move, insert the bent plate 7 of the conversion mechanism 2 into the limit plate groove of the bucket 1, and then manipulate the working linkage system to make the back plate of the bucket 1 abut against the bottom plate 6 of the conversion mechanism 2, and align the locating pin 18 with the locating hole of the bucket 1 under the action of the limit block 20. The hydraulic cylinder 11 is controlled by the control valve to move, and the hydraulic cylinder 11 drives the rotating shaft 13 to rotate through the first rotating block 10, and the rotating shaft 13 drives the second rotating block 15 to rotate, thereby driving the connecting shaft 16 to rotate so that the locating pin 18 moves up and down along the locating pin sleeve 19. When the locating pin 18 moves to the lower limit, it is inserted into the locating hole of the bucket 1, completing the process of quickly replacing the bucket.

[0030] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A conversion mechanism connected between a machine tool and a working connecting rod, characterized in that: The invention comprises a base plate (6), the upper end of which is fixed with a bent plate (7) for clamping with a machine tool, the middle of which is fixed with an intermediate hinge plate (12) for hingedly connecting with a pull rod (3) of a working connecting rod, and both ends of the base plate (6) are provided with a side hinge plate I (8) and a side hinge plate II (9) parallel to each other, the lower ends of the side hinge plate I (8) and the side hinge plate II (9) are hingedly connected with a movable arm (5) of the working connecting rod; a quick-change assembly is also provided on the base plate (6), the quick-change assembly comprises a hydraulic cylinder (11), a rotating shaft (13) and two telescopic mechanisms, the rotating shaft (13) is respectively hingedly connected with the hydraulic cylinder (11) and the two telescopic mechanisms, and the telescopic mechanism can pass through the base plate (6) and be inserted into a positioning hole of the machine tool to realize the connection between the conversion mechanism and the machine tool.

2. The conversion mechanism according to claim 1, characterized in that: The two ends of the rotating shaft (13) are rotatably connected to the two side hinged plates I (8) respectively, and the rotating shaft (13) is provided with a first rotating block (10) hinged to the hydraulic cylinder (11) and a second rotating block (15) hinged to the telescopic mechanism.

3. The conversion mechanism according to claim 2, characterized in that: The first rotating block (10) and the second rotating block (15) are fixedly connected to the rotating shaft (13) in the circumferential direction.

4. The conversion mechanism according to claim 2, characterized in that: The included angle between the first rotating block (10) and the second rotating block (15) is 45° to 90°.

5. The conversion mechanism according to claim 2, characterized in that: The telescopic mechanism comprises a connecting shaft (16), a positioning pin (18) and a positioning pin sleeve (19); the connecting shaft (16) is hinged to the second rotating block (15); the positioning pin (18) is hinged to the connecting shaft (16); and the positioning pin sleeve (19) is fixed to the bottom plate (6) via a sealing plate (21) and is slidably matched with the positioning pin (18).

6. The conversion mechanism according to claim 5, characterized in that: An elastic element (17) is sleeved on the connecting shaft (16), and two ends of the elastic element (17) respectively abut against the second rotating block (15) and the connecting shaft (16), wherein the contact surface between the second rotating block (15) and the elastic element (17) is a progressive curved surface.

7. The conversion mechanism according to claim 5, characterized in that: A limit block (20) is fixed on the side hinge plate I (8), and the bottom of the limit block (20) extends downward to achieve positioning of the machine tool, so that the positioning pin (18) can be aligned with the positioning hole of the machine tool.

8. The conversion mechanism according to claim 2, characterized in that: The middle hinge plate (12), the side hinge plate I (8) and the side hinge plate II (9) are provided with coaxial through holes at their upper parts, and the rotating shaft (13) passes through the middle hinge plate (12) and the side hinge plate II (9) and is rotatably connected to the side hinge plate I (8) via a supporting sleeve (14).

9. The conversion mechanism according to claim 1, characterized in that: Coaxial hinge holes are provided at the lower parts of the side hinged plate I (8) and the side hinged plate II (9), and the movable arm (5) of the working connecting rod is rotatably connected to the side hinged plate I (8) and the side hinged plate II (9) via a flange (22).

10. The conversion mechanism according to claim 9, characterized in that: A circular tube (23) is fixedly connected between the two side hinged plates II (9).

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