Load control mechanism of engine and working machine and branch crusher adopting same

Abstract

The utility model discloses a load control mechanism of an engine and a working machine and a branch crusher adopting the load control mechanism. A belt tensioning assembly comprises a driving belt pulley, a driven belt pulley and a belt, wherein the driving belt pulley and the driven belt pulley are sleeved with the belt; the tensioning device further comprises a tensioning assembly, the tensioning assembly comprises a rotating arm arranged beside the belt and a tensioning wheel installed in the middle of the rotating arm, and the tensioning wheel is arranged on one side of the belt and abuts against the belt; the movable end of the rotating arm is rotatably connected with a connecting rod mechanism, and the rotating arm can be driven by the connecting rod mechanism to rotate and drive the tensioning wheel to move to be away from or close to the belt, so that the engine and the working machine are unloaded or loaded. After the belt tensioning assembly is adopted, the tensioning wheel can be driven to be far away from or close to the belt by directly controlling rotation of the connecting rod mechanism, loosening or tensioning of the belt is achieved, and operation is convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery equipment field, concretely relates to a load control mechanism of engine and working machine and branch crusher adopting the mechanism. BACKGROUND

[0002] Traditional engine load starting, starting difficultly. Specifically, the engine is connected through the driving pulley, belt and driven pulley of working machine, the engine and working machine rotate simultaneously when starting, starting difficultly. To solve the problem of starting difficultly, part of engine starting mechanism is equipped with centrifugal clutch, through the pulley with centrifugal clutch and working machine connection, using the above structure although can solve the problem of starting difficultly, but the clutch cost is high and easy to slip and burn the belt, the transmission efficiency is low.

[0003] To solve the above problems, the patent number 2024112824190 discloses a kind of load sensing system filling valve, the filling valve includes hydraulic control reversing valve, electromagnetic reversing valve and priority valve, oil port one on priority valve is communicated with the one end of P pipeline, the spring interface of priority valve is communicated with the one end of LS pipeline;Oil port three is communicated with the one end of filling pipeline, the other end of filling pipeline is communicated with the one end of A1 pipeline and the one end of A2 pipeline respectively;A1 pipeline is communicated with the one end of F1 pipeline, A2 pipeline is communicated with the one end of F2 pipeline;Valve core interface of one end of hydraulic control reversing valve is communicated with pipeline two through pipeline, its other valve core interface is communicated with MA pipeline through pipeline, the one end of MA pipeline is communicated with filling pipeline.The filling valve provided by the application has the function of priority valve, can control the load of pump when engine starts, very easy to start vehicle, solve the energy waste design of multiple pumps of hydraulic system, simultaneously solve the problem that engine starts, and it is not easy to start when load is big.But the above system is relatively complex, and cost is high, and it is not suitable for the starting system of existing branch crusher. When the engine of existing branch crusher starts, since the output end of engine is connected with its branch mechanism, therefore, there is the problem of overload starting, and the cost is high in prior art when solving overload starting, and pipeline is complex, not suitable for branch crusher. SUMMARY

[0004] In view of the above problems in the prior art, the purpose of the utility model is to provide a load control mechanism of engine and working machine and branch crusher adopting the mechanism, to solve the problems of engine load starting difficultly, starting difficultly and high cost of load control modification for load starting, not suitable for branch crusher in the prior art.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The load control mechanism of the engine and the working machine comprises a driving pulley connected with the output end of the engine, a driven pulley connected with the input end of the working machine, and a belt sleeved on the driving pulley and the driven pulley; and further comprises a tensioning assembly, which comprises a swing arm arranged beside the belt and a tensioning wheel installed in the middle of the swing arm, the tensioning wheel is arranged on one side of the belt and abuts against the belt; a connecting rod mechanism is rotatably connected to the movable end of the swing arm, the swing arm can be driven to rotate by the connecting rod mechanism and drive the tensioning wheel to move away from or close to the belt, so as to unload or load the engine and the working machine. Thus, the engine and the working machine are connected by the belt transmission, the tensioning assembly is arranged in the belt transmission mechanism, the tensioning wheel is installed on the swing arm, so that when the engine is started, the position of the tensioning wheel on the swing arm will change, the tensioning wheel will move away from the belt, the belt will be loosened, and the engine and the working machine will not be connected by transmission, so that the engine will not be loaded when it is started, thereby saving more labor under the condition of load-free starting, and the improvement of the existing mechanism is small and the cost is low. After the engine is started, when the working machine needs to run, the swing arm is reversely driven to rotate by the connecting rod mechanism, the tensioning wheel on the swing arm moves to one side of the belt, abuts against the belt, and realizes the tensioning of the belt, at this time, the engine and the working machine are connected by transmission, and the working machine is driven to run by the belt transmission mechanism. This way of controlling the load or unloading of the engine and the working machine by controlling the tensioning assembly is simple in control mode, convenient to install and operate, and easy to popularize.

[0007] Further, the connecting rod mechanism comprises an installation base plate, a tensioning handle and an inclined connecting rod assembly, the installation base plate is fixedly installed above the driving pulley, and one end of the tensioning handle is rotatably installed on the installation base plate; the upper end of the connecting rod assembly is rotatably connected to the middle of the tensioning handle, and the other end is rotatably connected to the movable end of the swing arm; when the tensioning handle is rotated upward by a certain angle under the action of external force and fixed at the current position, the connecting rod assembly is driven to rotate, so that the tensioning wheel moves close to the belt; when the tensioning handle is rotated downward by a certain angle under the action of external force and fixed at the current position, the connecting rod assembly is driven to rotate downward, so that the tensioning wheel moves away from the belt. Thus, when in use, the connecting rod assembly and the swing arm connected therewith can be driven to rotate by rotating the tensioning handle, and the structure is compact and reliable. The tensioning handle can be held and rotated by the operator, and the operation is more convenient.

[0008] Further, a limiting column is arranged on the mounting base plate, an outward extending limiting part is arranged on the rotating end of the tensioning handle, and a limiting hole is arranged on the side end of the tensioning handle; after the tensioning handle is rotated upward, the limiting hole is clamped on the limiting column, and the tensioning handle is locked and positioned; after the tensioning handle is rotated downward, the limiting part is arranged under the limiting column and abuts against the limiting column, and the tensioning handle is locked and positioned. In this way, the limiting buckle and the limiting part arranged on the tensioning handle can cooperate with the limiting column when the tensioning handle is rotated to different positions, the limiting of the tensioning handle is realized, the rotating angle of the tensioning handle is limited, the accurate control of the pre-tightening force of the belt is ensured.

[0009] Further, the connecting rod assembly comprises a movable connecting block, a tension spring and a connecting plate, the tension spring is arranged between the movable connecting block and the connecting plate, and the upper and lower ends thereof are respectively connected with the movable connecting block and the upper end of the connecting plate, the end of the movable connecting block away from the tension spring is rotatably connected with the middle part of the tensioning handle through a pin shaft, and the lower end of the connecting plate is rotatably connected with the movable end of the rotating arm through a rotating shaft. In this way, the tension spring arranged in the connecting rod assembly can ensure that the movable connecting block and the connecting plate are not in hard contact, the rotation of the connecting rod assembly is effectively ensured to be more flexible, and the service life is longer.

[0010] Further, the movable connecting block is in a C shape, a through hole for hanging the tension spring is arranged on the movable connecting block, and a through hole for hanging the tension spring is arranged on the upper end of the connecting plate. In this way, the through hole on the movable connecting block and the through hole on the connecting plate can facilitate the installation of the tension spring, and the movable connecting block in the C shape can facilitate the connection between the movable connecting block and the tensioning handle.

[0011] Further, a belt pressing rod abutting against the belt is arranged on each side of the driving belt pulley. In this way, after one belt pressing rod is arranged on each side of the driving belt pulley, the belt at the driving belt pulley can be pressed.

[0012] A branch shredding machine comprises a belt tensioning assembly, an engine and a shredding mechanism; the belt tensioning assembly is as described above, the shredding mechanism comprises a mounting box body and a cutter shaft arranged in the mounting box body, and the engine is fixedly mounted on the mounting box body; the driving belt pulley is connected with the output shaft of the engine, the driven belt pulley is connected with the cutter shaft, and one end of the connecting rod mechanism is mounted on the engine box body and the other end is mounted on the mounting box body. In this way, after the branch shredding machine adopts the belt tensioning assembly, before the engine is started, the rotating arm is rotated by controlling the connecting rod mechanism, the tensioning wheel is away from the belt, the belt is loosened, the belt cannot realize power transmission between the driving belt pulley and the driving wheel at this time, the driven belt pulley cannot rotate the cutter shaft, and the engine is started by hand, which is more labor-saving. Before the branches are shredded, the belt is tensioned after the rotating arm is rotated by controlling the connecting rod mechanism, the belt is tensioned, the driven belt pulley can rotate under the driving of the driving belt pulley, and the branches are shredded. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Fig. 2 is a schematic view of the installation structure of the belt tensioning assembly in the embodiment;

[0014] Figure 2 Fig. 3 is a schematic view of the belt tensioning state in the brush chipper in the embodiment;

[0015] Figure 3 Fig. 4 is a schematic view of the belt loosening state in the brush chipper in the embodiment. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0017] It should be noted that similar reference numerals and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed during use, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0018] As Figure 1 , Figure 2As shown, the belt tensioning assembly provided by the embodiment is used for conveniently adjusting the pre-tightening force of the belt 4, and comprises a driving pulley 2 connected with the output end of the engine 1, a driven pulley 3 connected with the input end of the working machine (in the embodiment, the working machine refers to the crushing mechanism of the branch crusher), a tensioning assembly, and a belt 4 sleeved on the driving pulley 2 and the driven pulley 3; the tensioning assembly comprises a swing arm 6 arranged beside the belt 4 and a tensioning pulley 7 installed in the middle of the swing arm 6, the tensioning pulley 7 is arranged on one side of the belt 4 and abuts against the belt 4; a connecting rod mechanism 5 is rotatably connected to the movable end of the swing arm 6, the connecting rod mechanism 5 comprises an installation base plate 51, a tensioning handle 52, and an inclined connecting rod assembly, the installation base plate 51 is fixedly installed above the driving pulley 2, and one end of the tensioning handle 52 is rotatably installed on the installation base plate 51; the upper end of the connecting rod assembly is rotatably connected to the middle of the tensioning handle 52, and the other end is rotatably connected to the movable end of the swing arm 6; when the tensioning handle 52 is rotated upward by a certain angle under the action of external force and fixed at the current position, the connecting rod assembly and the swing arm 6 are driven to rotate, the tensioning pulley 7 approaches the belt 4, the belt 4 is in a tensioned state, the engine and the working machine are in a loaded state, and the working machine can be driven to operate; when the tensioning handle 52 is rotated downward by a certain angle under the action of external force and fixed at the current position, the connecting rod assembly and the swing arm 6 are driven to rotate, the tensioning pulley 7 moves away from the belt 4, the belt 4 is loosened, the engine and the working machine are in an unloaded state, and no-load starting can be realized when starting, and starting is more labor-saving. In this way, the engine 1 and the working machine are connected through the belt transmission mechanism, the tensioning assembly is arranged in the belt transmission mechanism, the tensioning pulley 7 is installed on the swing arm 6, and when the engine 1 is started, the swing arm 6 is driven to rotate through the connecting rod mechanism 5, the position of the tensioning pulley 7 on the swing arm 6 changes, the tensioning pulley 7 moves away from the belt 4, the belt 4 is loosened, the engine 1 and the working machine are not connected in transmission, and the engine 1 is not loaded when starting, so that the engine 1 is more labor-saving when starting under no-load, the improvement of the existing mechanism is relatively small, and the improvement cost is relatively low. After the engine 1 is started, when the working machine needs to operate, the swing arm 6 is reversely rotated through the connecting rod mechanism 5, the tensioning pulley 7 on the swing arm 6 moves to the side of the belt 4, approaches and abuts against the belt 4, the belt 4 is tensioned, the engine 1 and the working machine are connected in transmission, and the working machine operates under the driving of the belt transmission mechanism. The load or unloading of the engine and the working machine is controlled through the control of the tensioning assembly, the control mode is simple, the installation and operation are relatively convenient, and the method is convenient for wide promotion.

[0019] The rotating arm 6 in the embodiment is inverted V-shaped, one end of which is a rotating end and the other end is a movable end. Specifically, the movable end is one end rotatably connected with the connecting rod assembly; the rotating end is one end rotatably connected with the box body of the branch chipper. The rotating end of the rotating arm 6 is below the belt 4 and has a gap with the belt 4. The tensioning wheel 7 is installed in the middle of the rotating arm 6 through a tensioning shaft, the installation height of the tensioning shaft is higher than the height of the rotating end, and the movable end of the rotating arm 6 is pulled by the connecting rod mechanism 5 to rotate. When the movable end of the rotating arm 6 rotates downward, the tensioning wheel 7 moves to the lower left, away from the belt 4, and when the movable end of the rotating arm 6 rotates upward, the tensioning wheel 7 moves to the upper right, close to the belt 4, to tension the belt 4.

[0020] In order to facilitate rotation and installation, the tensioning handle 52 in the embodiment is composed of a flat plate and a rubber sleeve fixed on the flat plate; a limiting column 511 (the limiting column 511 is vertically arranged on the installation base plate 51 and is in a cylindrical shape) is arranged on the installation base plate 51, an outwardly extending limiting portion 521 is arranged on the rotating end of the tensioning handle 52, and a limiting opening 522 (the limiting buckle is arc-shaped) is arranged on the side end of the tensioning handle 52; after the tensioning handle 52 rotates upward, the limiting opening 522 is clamped on the limiting column 511, and the tensioning handle 52 is locked and positioned; after the tensioning handle 52 rotates downward, the limiting portion 521 is placed below the limiting column 511 and abuts against the limiting column 511, and the tensioning handle 52 cannot continue to rotate and is locked and positioned. In this way, the limiting buckle arranged on the tensioning handle 52 and the limiting portion 521 can cooperate with the limiting column 511 when the tensioning handle 52 rotates to different positions, thereby limiting the tensioning handle 52, limiting the rotation angle, and ensuring the accurate control of the pre-tightening force of the belt 4.

[0021] Further, the connecting rod assembly includes a movable connecting block 53, a tension spring 54 and a connecting plate 55, the tension spring 54 is arranged between the movable connecting block 53 and the connecting plate 55, and the upper and lower ends thereof are respectively connected with the movable connecting block 53 and the upper end of the connecting plate 55, one end of the movable connecting block 53 away from the tension spring 54 is rotatably connected with the middle part of the tensioning handle 52 through a pin shaft, and the lower end of the connecting plate 55 is rotatably connected with the movable end of the rotating arm 6 through a rotating shaft. In this way, the tension spring 54 arranged in the connecting rod assembly can ensure that the movable connecting block 53 and the connecting plate 55 are not in hard contact, effectively ensure that the connecting rod assembly rotates more flexibly, and has a longer service life.

[0022] Further, the movable connecting block 53 is C-shaped, a through hole for hanging the tension spring 54 is arranged on the movable connecting block 53, and a through hole for hanging the tension spring 54 is arranged on the upper end of the connecting plate 55. In this way, the through hole on the movable connecting block 53 and the through hole on the connecting plate 55 can facilitate the installation of the tension spring 54, and the movable connecting block 53 is C-shaped, which facilitates the connection between the tensioning handle 52.

[0023] Further, the belt pressing rod (not shown in the figure) is arranged on both sides of the driving pulley 2 and closely contacts with the belt 4. Thus, the belt 4 on the driving pulley 2 can be pressed tightly by arranging the belt pressing rod on both sides of the driving pulley 2.

[0024] As shown in Figure 2 , Figure 3 The embodiment further provides a branch shredder, which comprises the belt tensioning assembly, the engine 1, a feeding mechanism, a shredding mechanism and a discharging mechanism. The belt tensioning assembly is as described above. The shredding mechanism comprises a mounting box 8 and a cutter shaft arranged in the mounting box 8. The engine 1 is fixedly arranged on the mounting box 8. The driving pulley 2 is connected with the output shaft of the engine 1, and the driven pulley 3 is connected with the cutter shaft. One end of the connecting rod mechanism 5 is arranged on the engine 1 box, and the other end is arranged on the mounting box 8. Thus, the branch shredder adopts the belt tensioning assembly. Before the engine 1 is started, the connecting rod mechanism 5 is controlled to drive the rotating arm 6 to rotate, so that the tension pulley 7 is away from the belt 4, the belt 4 is loosened, the belt 4 cannot be power-transmitted between the driving pulley 2 and the driving pulley, the driven pulley 3 cannot drive the cutter shaft to rotate (at this time, the engine is in an unloading state), and the engine 1 is started by hand, which is more labor-saving. Before the branches are shredded, the connecting rod mechanism 5 is controlled to drive the rotating arm 6 to rotate, so that the tension pulley 7 is close to the belt 4, the belt 4 is tensioned (at this time, the engine is in a transmission connection with the shredding mechanism, and is in a load state), and the driven pulley 3 can rotate under the driving of the driving pulley 2, so that the branches are shredded.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the technical solutions. Those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. An engine and working machine load control mechanism comprising a driving pulley connected to an output of an engine, a driven pulley connected to an input of a working machine, and a belt fitted around the driving pulley and the driven pulley, characterized in that, The tensioning assembly comprises a rotating arm arranged beside the belt and a tensioning wheel arranged in the middle of the rotating arm and placed on one side of the belt and abutting against the belt; a connecting rod mechanism is rotatably connected to the movable end of the rotating arm, and the rotating arm can be driven to rotate by the connecting rod mechanism and drive the tensioning wheel to move away from or approach the belt, so as to unload or load the engine and the working machine.

2. The load control mechanism of claim 1, wherein, The connecting rod mechanism comprises a mounting base plate, a tensioning handle and an inclined connecting rod assembly, the mounting base plate is fixedly arranged above the driving pulley, and one end of the tensioning handle is rotatably arranged on the mounting base plate; the upper end of the connecting rod assembly is rotatably connected to the middle of the tensioning handle, and the other end is rotatably connected to the movable end of the rotating arm; when the tensioning handle is driven to rotate upward by a certain angle and is fixed at the current position, the connecting rod assembly is driven to rotate, so that the tensioning wheel approaches the belt; when the tensioning handle is driven to rotate downward by a certain angle and is fixed at the current position, the connecting rod assembly is driven to rotate downward, so that the tensioning wheel moves away from the belt.

3. The load control mechanism of claim 2, wherein A limiting column is arranged on the mounting base plate, an outward extending limiting part is arranged on the rotating end of the tensioning handle, and a limiting opening is arranged on the side end of the tensioning handle; after the tensioning handle is rotated upward, the limiting opening is clamped on the limiting column, and the tensioning handle is locked and positioned; After the tensioning handle is rotated downward, the limiting part is arranged below the limiting column and abuts against the limiting column, and the tensioning handle is locked and positioned.

4. The load control mechanism of an engine and working machine according to claim 2 or 3, characterized in that, The connecting rod assembly comprises a movable connecting block, a tension spring and a connecting plate, the tension spring is arranged between the movable connecting block and the connecting plate, and the upper and lower ends of the tension spring are respectively connected to the upper ends of the movable connecting block and the connecting plate; the end of the movable connecting block away from the tension spring is rotatably connected to the middle of the tensioning handle through a pin shaft, and the lower end of the connecting plate is rotatably connected to the movable end of the rotating arm through a rotating shaft.

5. The load control mechanism of claim 4, wherein, The movable connecting block is in a C shape, and a through hole for hanging the tension spring is arranged on the movable connecting block, and a through hole for hanging the tension spring is arranged on the upper end of the connecting plate.

6. The load control mechanism of an engine and working machine according to claim 1 or 2 or 3 or 5, characterized in that, Belt pressing rods are further arranged on both sides of the driving pulley and abut against the belt.

7. A brush chipper characterized by The load control mechanism of the engine and the working machine comprises the load control mechanism of the engine and the working machine according to any one of claims 1-6.

8. The brush chipper of claim 7, wherein, The load control mechanism of the engine and the working machine comprises the load control mechanism of the engine and the working machine according to any one of claims 1-6. The load control mechanism of the engine and the working machine comprises the load control mechanism of the engine and the working machine according to any one of claims 1-6.

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