A deformable wheel telescopic mechanism based on hydraulic drive

Abstract

The present invention discloses a deformable wheel telescopic mechanism capable of wheel-leg conversion, and relates to a deformable wheel telescopic mechanism based on hydraulic drive, which is suitable for various self-propelled agricultural machinery operating in farmland, including micro-tillage machines, etc., and can improve the walking efficiency of agricultural machinery, enhance driving force, and reduce wheel slip rate, especially when operating in paddy fields. The deformable wheel telescopic mechanism comprises an outer wheel rim 1, an inner wheel rim 3, a hydraulic system, telescopic legs 4, and a connecting component 5 that plays a supporting and connecting role. The deformable wheel telescopic mechanism of the present invention can flexibly control the telescopic legs to change the working state through the hydraulic system, so that it can adapt to walking on soft ground such as soil and hard ground. The various parts of the deformable wheel telescopic mechanism are sealed or painted to prevent rusting when exposed to air and water, and are convenient for later cleaning. The present invention improves the traction efficiency of paddy field agricultural machinery, has good passability, simple structure, and high stability.

Description

Technical Field

[0001] The invention discloses a deformable wheel telescopic mechanism with a simple structure, which relates to a deformable wheel telescopic mechanism based on hydraulic drive and capable of wheel-leg conversion. The mechanism is suitable for various self-propelled agricultural machinery operating in farmland, including micro-tillage machines, etc., and can improve the walking efficiency of agricultural machinery, enhance driving force, and reduce wheel slip rate, especially when operating in paddy fields. Background Art

[0002] The development speed of agricultural mechanization in my country is getting faster and faster. Agricultural mechanization is in a golden period of rapid development. The domestic demand for agricultural machinery is relatively strong. At the same time, the speed of agricultural machinery renewal is gradually accelerating, and the requirements for the development speed of new agricultural machinery are getting higher and higher. In the research of new agricultural machinery, the requirements for the performance of machinery, especially the passability, are getting higher and higher. The wheel is an important component that affects the passability of the machinery, which directly affects the performance of various agricultural machinery. Domestic paddy field agricultural machinery often causes large wheel slip rate, excessive walking resistance, and vehicle stuck due to the unreasonable use of wheels; therefore, designing wheels suitable for walking on paddy field clay soil is conducive to improving the hook traction and driving efficiency of agricultural machinery in field operations, reducing wheel slippage, and reducing rolling resistance. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulically driven deformable wheel telescopic mechanism with simple structure, high stability, easy cleaning, and suitable for paddy field agricultural machinery, especially micro-tillage machines, and capable of wheel-leg conversion.

[0004] To achieve the above object, the present invention provides the following solution.

[0005] A deformable wheel telescopic mechanism based on hydraulic drive, characterized in that it includes an outer wheel rim, an inner wheel rim, a hydraulic system, telescopic legs and connecting parts that play a supporting and connecting role; the outer wheel rim includes two circular outer rings processed from aluminum alloy; the inner wheel rim is processed with eight planes in a circumferential array, and the planes are processed with threaded holes for connecting and fixing the legs; the hub and spokes of the inner wheel rim are processed into a cavity structure to form the hydraulic cylinder of the hydraulic system; the hydraulic system includes a hydraulic cylinder, a piston rod, a quick-change joint, a sealing ring, and also includes hydraulic oil and an external manual hydraulic pump; the piston One end of the rod is inside the hydraulic cylinder, and the other end is connected to the telescopic leg through a hexagonal nut, a spring washer and a flat washer. The flow of hydraulic oil in the hydraulic system drives the piston rod in the hydraulic cylinder to reciprocate, thereby driving the telescopic leg to extend and retract. When the piston rod is pushed outward, the telescopic leg of the deformable wheel telescopic mechanism is driven to extend to form a telescopic state. When the piston rod is retracted, the telescopic leg of the deformable wheel telescopic mechanism is driven to retract to form a retracted state. The connecting parts include a mounting frame, a support frame, an end cover and a leg. All the structures are sealed or painted to prevent rust, extend the service life and facilitate cleaning.

[0006] A plurality of countersunk holes are regularly processed on the two circular outer rings of the outer wheel rim, and the countersunk holes are used to connect and fix the outer wheel rim with the mounting frame and the support rod through hexagon socket screws.

[0007] Preferably, the hub and spokes of the inner rim are processed into a cavity structure as the hydraulic cylinders of the hydraulic system. There are eight hydraulic cylinders in total. The bottom and top of the eight cylinders are respectively processed with annular oil channels I and annular oil channels II to connect them to each other; the inner rim also includes an inner ring oil channel pressure cap I and an inner ring oil channel pressure cap II made of aluminum alloy, and the annular oil channel I and annular oil channel II are respectively pressed with inner ring oil channel pressure cap I and inner ring oil channel pressure cap II.

[0008] The inner ring oil channel gland I and the inner ring oil channel gland II are respectively processed with hydraulic oil port I and hydraulic oil port II, and the hydraulic oil port I and hydraulic oil port II are installed with quick-change connectors for easy connection with a manual hydraulic pump. Through the reversing valve on the manual hydraulic pump, the hydraulic oil port I and hydraulic oil port II can be respectively allowed to inlet or return oil to achieve extension and retraction of the telescopic legs; a circle of through holes is also processed on the wheel hub, and the through holes can be used to connect the flange plate, and a hexagonal hole is processed in the center of the wheel hub for easy connection with the output shaft of agricultural machinery such as a micro-tiller.

[0009] Preferably, the telescopic leg comprises eight rectangular frames made of aluminum alloy with exactly the same size and shape; threaded holes from outside to inside are processed in the thickness direction of the rectangular frame to facilitate the installation of different forms of wheel feet on the telescopic leg at a later stage.

[0010] Preferably, the mounting frame is made of aluminum alloy, and mounting holes are processed on the left and right sides of the mounting frame. The mounting holes fix the mounting frame to the outer wheel rim through hexagon socket screws. Eight mounting frames are evenly distributed on the circumference of the wheel rim, connecting the front and rear circular outer rings together to form the outer wheel rim.

[0011] Preferably, the support frame is made of aluminum alloy and is installed on both sides of the telescopic legs to fix them and bear the radial force of the wheels to prevent the piston rod from being subjected to bending moment. The installation distance of each pair of support frames is slightly larger than the thickness of the telescopic legs to prevent the telescopic legs from generating friction with the support frames when extending and retracting, thereby reducing work efficiency and causing damage to processed parts such as the telescopic legs and support frames. Support frame mounting holes are processed on the left and right ends of the support frames and are mounted and fixed to the outer wheel rim through hexagon socket screws. Eight pairs of support frames are evenly distributed on the circumference of the wheel rim.

[0012] Preferably, the legs are made of aluminum alloy, and the base of each leg is processed with four leg fixing holes. The leg fixing holes are connected to the threaded holes on the inner rim by bolts to fix the legs on the inner rim. The other end of the leg is processed into a bayonet shape to clamp the support frame for fixed support, and each pair of support frames corresponds to a pair of legs.

[0013] The piston rod is connected to the hydraulic cylinder through an end cover, and the end cover is made of aluminum alloy and is installed on the inner rim through hexagon socket screws, spring washers and flat washers. When the piston rod, end cover and hydraulic cylinder are connected, dust rings, retaining rings, O-rings and combined seals are also installed to play a role of dustproof sealing.

[0014] Preferably, when the telescopic legs of the deformable wheel telescopic mechanism are in a retracted working state, the support frame, the mounting frame and the telescopic plate form a nearly complete circular surface; the outer sides of the mounting frame and the telescopic legs are respectively processed with mounting frame threaded holes and threaded through holes for installing shock-absorbing materials such as rubber, which can improve the smoothness of the deformable wheel when walking on hard ground and reduce its vibration and noise.

[0015] Compared with the prior art, the present invention has achieved the following technical effects.

[0016] The hydraulically driven deformable wheel telescopic mechanism disclosed in the present invention can be adapted to walking on paddy fields and hard ground at the same time. The telescopic legs are driven to extend and retract by the hydraulic system, that is, the manual hydraulic pump provides power to convert mechanical energy into pressure energy of hydraulic oil. The hydraulic valve on the manual hydraulic pump controls the flow direction of the hydraulic oil to convert the pressure energy into the reciprocating motion of the piston rod, and the movement of the piston rod drives the telescopic legs to extend and retract, forming two different working states. The deformable wheel telescopic mechanism also has the characteristics of simple structure, high stability and easy cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is an overall structural diagram of the deformable wheel telescopic mechanism of the present invention in a retracted state of the telescopic legs.

[0019] Figure 2 It is an overall structural diagram of the deformable wheel telescopic mechanism of the present invention in a state where the telescopic legs are extended.

[0020] Figure 3 This is the structural diagram of the inner rim.

[0021] Figure 4 This is the parts diagram of the mounting bracket.

[0022] Figure 5 This is the support frame parts drawing.

[0023] Figure 6 This is the part diagram of the outrigger.

[0024] Figure 7 This is the end cover parts drawing.

[0025] Explanation of the reference numerals: 1 outer wheel rim; 2 hydraulic oil port Ⅰ, hydraulic oil port Ⅱ; 3 inner wheel rim; 4 telescopic leg; 5 connecting part; 6 circular outer ring; 7 countersunk hole; 8 hexagon socket screw; 9 quick-change connector; 10 piston rod; 11 leg; 12 spoke; 13 hub; 14 through hole; 15 mounting frame; 16 inner ring oil passage gland Ⅱ; 17 inner ring oil passage gland Ⅰ; 18 support frame; 19 end cover; 20 hexagonal nut, spring washer and flat washer; 21 plane; 22 threaded hole; 23 hydraulic cylinder; 24 mounting frame mounting hole; 25 mounting frame threaded hole; 26 support frame mounting hole; 27 leg fixing hole; 28 leg base; 29 end cover base; 30 threaded through hole; 31 hexagonal hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The purpose of the present invention is to design a deformable wheel telescopic mechanism which has a simple structure, can change working states, and can adapt to walking on paddy fields and hard ground at the same time.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 , Figure 2 As shown, an embodiment of the present invention provides a hydraulically driven deformable wheel telescopic mechanism, which is suitable for various paddy field wheeled machinery including micro-tillage machines to prevent slipping and sinking during paddy field operations and reduce mud; the deformable wheel telescopic mechanism has two states, so that it can adapt to walking on paddy fields and hard surfaces at the same time; the present invention can achieve paddy field driving and hard road driving without replacing the driving wheels of agricultural machinery, has good passability, and has a simple structure and high stability.

[0030] The deformable wheel telescopic mechanism based on hydraulic drive includes an outer wheel rim 1, an inner wheel rim 3, a hydraulic system, telescopic legs 4 and a connecting component 5 that plays a supporting and connecting role; the outer wheel rim 1 includes two circular outer rings 6 processed from aluminum alloy; a large number of countersunk holes 7 are regularly processed on the two circular outer rings 6, and the countersunk holes 7 connect and fix the outer wheel rim 1 with the mounting frame 15 and the support rod 18 through the hexagon socket screws 8.

[0031] The rim of the inner wheel rim 3 is processed with eight planes 21 in a circular array, and the planes 21 are processed with threaded holes 22 for connecting and fixing the legs 11; the hub 13 and the spokes 12 of the inner wheel rim 3 are processed into a cavity structure as the hydraulic cylinders of the hydraulic system, and the bottom and top of the eight cylinders are respectively processed with annular oil channels I and annular oil channels II to connect them to each other; the inner wheel rim 3 also includes an inner ring oil channel pressure cap I 17 and an inner ring oil channel pressure cap II 16 processed from aluminum alloy, and the annular oil channel I and the annular oil channel II are respectively pressed by the inner ring oil channel pressure cap I and the inner ring oil channel pressure cap II.

[0032] The inner ring oil channel pressure cap Ⅰ17 and the inner ring oil channel pressure cap Ⅱ16 are respectively processed with hydraulic oil port I and hydraulic oil port II2. The two hydraulic oil ports are installed with quick-change connectors 9 for convenient connection with the manual hydraulic pump. Through the reversing valve on the manual hydraulic pump, the hydraulic oil port I and hydraulic oil port II can be respectively made to inlet or return oil to realize the extension and retraction of the telescopic leg 4; a circle of through holes 14 are processed on the wheel hub 13 for connecting the flange. In addition, the wheel hub 13 is also processed with a hexagonal hole 31 for connecting with the output shaft of agricultural machinery such as a micro-tiller.

[0033] The hydraulic system includes a hydraulic cylinder, a piston rod 10, a quick-change joint 9, a sealing ring, and also includes hydraulic oil and an external manual hydraulic pump; one end of the piston rod 10 is inside the hydraulic cylinder 23, and the other end is connected to the telescopic leg 4 through a hexagonal nut, a spring washer and a flat washer 20. The flow of hydraulic oil in the hydraulic system drives the piston rod 10 in the hydraulic cylinder 23 to reciprocate, thereby driving the telescopic leg 4 to extend and retract; when it is necessary to walk on soft ground such as paddy fields, the hydraulic oil in the inner ring oil channel gland I is pressed into the inner ring oil channel gland II by an external power original manual hydraulic pump, and the piston rod 10 moves outward along the hydraulic cylinder 23 under the pressure of the hydraulic oil, and at the same time drives the telescopic leg 4 connected thereto to extend outward to form a walking wheel. After the corresponding shock-absorbing element is installed on the telescopic leg 4, its slip rate on soft ground is greatly reduced, and the passing efficiency is improved. When it is necessary to walk on hard surfaces such as cement floors, the oil inlet and outlet ports and the flow direction of the hydraulic oil are changed, and the hydraulic oil in the inner ring oil channel gland II is pressed into the inner ring oil channel gland I by the manual hydraulic pump of the power original. The piston rod 10 moves inward along the hydraulic cylinder 23 under the pressure of the hydraulic oil, and at the same time drives the telescopic leg 4 connected thereto to retract back, so that the rim of the deformable wheel forms a complete circular surface. After installing corresponding rubber or shock-absorbing elements on the mounting frame 15 and the telescopic leg 4, the smoothness of the deformable wheel when walking on hard surfaces can be improved, and its vibration and noise can be reduced.

[0034] The telescopic legs 4 include eight rectangular frames made of aluminum alloy with the same size and shape. Two threaded through holes 30 extending from outside to inside are formed in the thickness direction of the rectangular frames to facilitate the installation of different types of wheel feet on the telescopic legs 4 at a later stage.

[0035] The connecting component 5 includes a mounting frame 15, a support frame 18, an end cover 19 and a support leg 11; the mounting frame 15 is made of aluminum alloy, and mounting frame mounting holes 24 are processed on the left and right sides thereof. The mounting frame 15 is fixed to the outer wheel rim 1 by hexagon socket screws. Eight mounting frames 15 are evenly distributed on the circumference of the wheel rim, connecting the front and rear circular outer rings 6 together to form the outer wheel rim 1.

[0036] The support frame 18 is made of aluminum alloy and is installed on both sides of the telescopic leg 4 to fix it. At the same time, it plays a role in bearing the radial force of the wheel to prevent the piston rod 10 from being subjected to bending moment. The installation distance of each pair of support frames 18 is slightly larger than the thickness of the telescopic leg to prevent the telescopic leg 4 from generating friction with the support frame 18 when telescoping, thereby reducing work efficiency and causing damage to the telescopic leg 4, support frame 18 and other processed parts. Support frame mounting holes 26 are processed on the left and right ends of the support frame 18 and are installed and fixed to the outer wheel rim 1 through hexagon socket screws 8. Each telescopic leg 4 is fixed with a pair of support frames 18, and eight pairs of support frames 18 are evenly distributed on the circumference of the wheel rim.

[0037] The legs 11 are made of aluminum alloy, and the base 28 of each leg is processed with four leg fixing holes 27, which are connected to the threaded holes 22 on the inner rim 3 by bolts to fix the legs 11 on the inner rim 3. The other end of the leg 11 is processed into a bayonet shape to clamp the support frame 18 for fixed support. Each pair of support frames 18 corresponds to a pair of legs 11.

[0038] The piston rod 10 is connected to the hydraulic cylinder 23 through the end cover 19. The end cover 19 is made of aluminum alloy and is installed on the inner rim 3 through hexagon socket screws, spring washers and flat washers. When the piston rod 10, the end cover 19 and the hydraulic cylinder 23 are connected, dust rings, retaining rings, O-rings and combined seals are also installed to play a role of dustproof sealing.

[0039] When the telescopic leg 4 of the deformable wheel telescopic mechanism is in the retracted working state, the support frame 18, the mounting frame 15 and the telescopic leg 4 form a nearly complete circular surface; the outer sides of the mounting frame 15 and the telescopic leg 4 are respectively processed with a mounting frame threaded hole 25 and a threaded through hole 30, which are used to install shock-absorbing materials such as rubber to improve the smoothness of the deformable wheel when walking on hard ground and reduce its vibration and noise. All structures of the deformable wheel telescopic mechanism are sealed or painted to prevent rust, extend service life and facilitate cleaning.

[0040] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A hydraulically driven deformable wheel telescopic mechanism, characterized in that: It includes an outer wheel rim, an inner wheel rim, a hydraulic system, telescopic legs and connecting parts that play a supporting and connecting role; the outer wheel rim includes two circular outer rings made of aluminum alloy; the inner wheel rim is processed with eight planes in a circumferential array, and the planes are processed with threaded holes for connecting and fixing the legs; the hub and spokes of the inner wheel rim are processed into a cavity structure to form the hydraulic cylinder of the hydraulic system; the hydraulic system includes a hydraulic cylinder, a piston rod, a quick-change joint, a sealing ring, and also includes hydraulic oil and an external manual hydraulic pump; one end of the piston rod is inside the hydraulic cylinder, and the other end is connected to the telescopic leg through a hexagonal nut, a spring washer and a flat washer, and the hydraulic cylinder is driven by the flow of hydraulic oil in the hydraulic system The piston rod in the wheel reciprocates to drive the telescopic legs to extend and retract; when the piston rod is pushed outward, the telescopic legs of the deformable wheel telescopic mechanism extend to the extended state, and when the piston rod is retracted, the telescopic legs are driven to retract so that the rim of the deformable wheel forms a complete circular surface; the connecting parts include a mounting frame, a support frame, an end cover and a support leg; the above structures are all sealed or painted to prevent rust, extend the service life and facilitate cleaning; the hub and spokes of the inner wheel rim are processed into a cavity structure as the hydraulic cylinder of the hydraulic system, and there are eight hydraulic cylinders in total, and the bottom and top of the eight cylinders are respectively processed with annular oil channels I and annular oil channels II to connect them to each other; the inner The wheel rim also includes an inner ring oil passage gland I and an inner ring oil passage gland II made of aluminum alloy, and the annular oil passage I and the annular oil passage II are respectively pressed by the inner ring oil passage gland I and the inner ring oil passage gland II; the inner ring oil passage gland I and the inner ring oil passage gland II are respectively processed with hydraulic oil port I and hydraulic oil port II, and the hydraulic oil port I and the hydraulic oil port II are installed with quick-change connectors for easy connection with a manual hydraulic pump. Through the reversing valve on the manual hydraulic pump, the hydraulic oil port I and the hydraulic oil port II can be respectively made to inlet or return oil to realize the extension and retraction of the telescopic legs; a circle of through holes is also processed on the wheel hub, and the through holes can be used to connect the flange plate, and the center of the wheel hub is processed with a hexagonal hole for easy connection with the micro-tiller. The output shaft is connected; the support frame is made of aluminum alloy, installed on both sides of the telescopic leg to fix it, and at the same time bear the radial force of the wheel to prevent the piston rod from being subjected to bending moment. The left and right ends of the support frame are processed with support frame mounting holes, which are installed and fixed with the outer wheel rim through hexagon socket screws. Each telescopic leg corresponds to a pair of support frames, and eight pairs of support frames are evenly distributed on the circumference of the wheel rim; the legs are made of aluminum alloy, and the base of each leg is processed with four leg fixing holes, which are connected with the threaded holes on the inner wheel rim through bolts to fix the legs on the inner wheel rim. The other end of the leg is processed into a bayonet shape to clamp the support frame to play a role of fixed support, and each pair of support frames corresponds to a pair of legs;The piston rod is connected to the hydraulic cylinder through the end cover, which is made of aluminum alloy and installed on the inner wheel ring through hexagon socket screws, spring washers and flat washers. When the piston rod, end cover and hydraulic cylinder are connected, dust rings, retaining rings, O-rings and combined seals are installed to play the role of dustproof sealing. ; 2. The hydraulically driven deformable wheel telescopic mechanism according to claim 1, characterized in that: A plurality of countersunk holes are regularly processed on the two circular outer rings of the outer rim, and the countersunk holes are used to connect and fix the outer rim with the mounting frame and the support rod through hexagon socket screws.

3. The hydraulically driven deformable wheel telescopic mechanism according to claim 1, characterized in that: The telescopic legs include eight rectangular frames made of aluminum alloy with exactly the same size and shape; threaded holes are processed from outside to inside in the thickness direction of the rectangular frames to facilitate the installation of different forms of wheel feet on the telescopic legs in the later stage.

4. The hydraulically driven deformable wheel telescopic mechanism according to claim 1, characterized in that: The mounting frame is made of aluminum alloy, and mounting holes are processed on the left and right sides of the mounting frame. The mounting frames are fixed to the outer wheel rim through the mounting holes of the mounting frame by hexagon socket screws. Eight mounting frames are evenly distributed on the circumference of the wheel rim, and the front and rear circular outer rings are connected together to form the outer wheel rim.

5. The hydraulically driven deformable wheel telescopic mechanism according to claim 1, characterized in that: When the telescopic legs of the deformable wheel telescopic mechanism are in a retracted working state, the support frame, the mounting frame and the telescopic legs form a nearly complete circular surface; the outer sides of the mounting frame and the telescopic legs are respectively processed with mounting frame threaded holes and threaded through holes for installing shock-absorbing materials such as rubber, which can improve the smoothness of the deformable wheel when walking on hard ground and reduce its vibration and noise.

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