CN111546827A - Deformation wheel telescopic mechanism based on hydraulic drive - Google Patents

Abstract

The invention discloses a deformable wheel telescopic mechanism capable of switching wheel legs, and relates to a deformable wheel telescopic mechanism based on hydraulic drive, which is suitable for various self-propelled agricultural machines for farmland operation, including mini-tillers and the like, and can improve the walking efficiency of the agricultural machines, enhance the driving force and reduce the wheel slip rate particularly during paddy field operation. The deformation wheel telescopic mechanism comprises an outer wheel ring 1, an inner wheel ring 3, a hydraulic system, telescopic legs 4 and connecting parts 5 for supporting and connecting. The deformation wheel telescopic mechanism can flexibly control the telescopic legs to be telescopic through a hydraulic system so as to change the working state, so that the deformation wheel telescopic mechanism can be suitable for walking on soft ground and hard ground such as soil. Each part of deformation wheel telescopic machanism prevents to expose in air and aquatic and takes place the corrosion through sealed or the processing of spraying paint, makes things convenient for the washing in later stage simultaneously. The invention improves the traction efficiency of paddy field agricultural machinery, and has good trafficability, simple structure and high stability.

Description

A Deformation Wheel Telescopic Mechanism Based on Hydraulic Drive

technical field

The invention discloses a deformation wheel telescopic mechanism with a simple structure, and relates to a deformation wheel telescopic mechanism based on hydraulic drive and convertible wheel legs, which is suitable for various self-propelled agricultural machinery operating in farmland, including micro-tillers, etc. , especially in paddy fields, it can improve the walking efficiency of agricultural machinery, enhance the driving force, and reduce the wheel slip rate.

Background technique

The development speed of agricultural mechanization in China is getting faster and faster. Agricultural mechanization is in the golden period of rapid development. The domestic demand for agricultural machinery is relatively strong. Higher and higher. In the research of new agricultural machinery, the requirements for the performance of the machinery, especially the passability, are getting higher and higher, and the wheel is an important component that affects the passability of the machine, which directly affects the performance of various performances of agricultural machinery. Paddy field agricultural machinery often causes large wheel slip rate, excessive walking resistance, and vehicle trapping due to the irrationality of the wheels used. Therefore, designing wheels suitable for walking in paddy soils is conducive to improving the hook of agricultural machinery for field operations. Traction and drive efficiency, reduced wheel slip, and reduced rolling resistance, etc.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a deformation wheel telescopic mechanism based on hydraulic drive, which is simple in structure, high in stability, easy to clean, and suitable for paddy field agricultural machinery, especially micro-tillers.

To achieve the above objects, the present invention provides the following solutions.

A deformation wheel telescopic mechanism based on hydraulic drive is characterized in that it includes an outer rim, an inner rim, a hydraulic system, a telescopic leg and a connecting part for supporting and connecting; the outer rim includes two aluminum alloy processing The inner rim is machined with eight planes in a circular array, and the planes are machined with threaded holes for connecting the fixed legs; the hub and spokes of the inner rim are internally machined The structure of the cavity forms 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 in the hydraulic cylinder. Inside the cylinder, one end is connected to the telescopic leg through a hexagonal nut, a spring washer and a flat washer, and 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 expand and contract; when the piston rod is pushed out, it drives The telescopic legs of the deformation wheel telescopic mechanism extend to form a telescopic state. When the piston rod is retracted, it drives the telescopic legs of the deformation wheel telescopic mechanism to retract to form a retracted state; the connecting components include a mounting frame, a support frame, an end cover and Outriggers; all the structures are sealed or painted to prevent corrosion, prolong service life and facilitate cleaning.

Several counterbores are regularly machined on the two circular outer rings of the outer rim, and the countersunk holes are used to connect and fix the outer rim, the mounting frame and the support rod together through hexagon socket screws.

Preferably, the hub and the spokes of the inner rim are internally processed into a cavity structure as the hydraulic cylinders of the hydraulic system. There are eight hydraulic cylinders in total, and the bottom and the top of the eight cylinders are respectively machined with annular oil passages I. and the annular oil passage II to communicate with each other; the inner rim also includes an inner ring oil passage gland I and an inner ring oil passage gland II which are processed from aluminum alloys. The annular oil passage I and the annular oil passage Channel II is respectively pressed with inner ring oil channel gland I and inner ring oil channel gland II.

The inner ring oil passage gland I and the inner ring oil passage gland II are respectively machined with hydraulic oil port I and hydraulic oil port II, and quick-change joints are installed on the hydraulic oil port I and hydraulic oil port II to facilitate the The manual hydraulic pump is connected, and through the reversing valve on the manual hydraulic pump, the hydraulic oil port I and the hydraulic oil port II can be fed or returned oil respectively, so as to realize the extension and retraction of the telescopic legs; the hub is also machined with a circle Through holes, the through holes can be used to connect the flange, and the center of the hub is machined with a hexagonal hole to facilitate connection with the output shaft of agricultural machinery such as a tiller.

Preferably, the telescopic legs include eight rectangular frames machined from aluminum alloys with the same size and shape; the rectangular frames are machined with threaded holes from outside to inside in the thickness direction, which is convenient for later installation of different telescopic legs on the telescopic legs. in the form of wheel feet.

Preferably, the mounting frame is made of aluminum alloy, and mounting holes are machined on the left and right sides of the mounting frame. The mounting holes are used to fix the mounting frame on the outer rim with hexagon socket screws, and the eight mounting frames are evenly distributed on the outer rim. On the circumference of the rim, the front and rear two circular outer rings are connected together to form an outer rim.

Preferably, the support frame is made of aluminum alloy, and is installed on both sides of the telescopic leg for fixing and bearing the radial force of the wheel to prevent the piston rod from being subjected to bending moment. The installation distance is slightly larger than the thickness of the telescopic legs, so as to prevent friction with the support frame when the telescopic legs are retracted, reduce work efficiency and cause damage to the telescopic legs, support frames and other processed parts. The left and right ends of the support frame are processed with support frame mounting holes through the hexagon socket The screws are installed and fixed with the outer rim, and eight pairs of support frames are evenly distributed on the circumference of the rim.

Preferably, the outriggers are made of aluminum alloy, and the base of each outrigger is machined with four outrigger fixing holes, and the outrigger fixing holes are connected with the threaded holes on the inner rim by bolts to connect the outriggers It is fixed on the inner rim, and the other end of the outrigger is processed into a bayonet shape to clamp the support frame to play the role of fixed support, and each pair of support frames corresponds to a pair of legs.

The piston rod is connected with the hydraulic cylinder through an end cover, the end cover is made of aluminum alloy, and is installed on the inner rim through a hexagon socket head screw, a spring washer and a flat washer. The piston rod, the end cover and the hydraulic cylinder are When connecting, a dustproof ring, a retaining ring, an O-ring and a combined seal are also installed to play the role of dustproof sealing.

Preferably, when the telescopic legs of the deformation 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 processed respectively There are threaded holes and threaded through holes for the mounting bracket to install shock-absorbing materials such as rubber, which can improve the smoothness of the deformation wheel when walking on hard ground, and reduce its vibration and noise.

Compared with the prior art, the present invention achieves the following technical effects.

The deformation wheel telescopic mechanism based on hydraulic drive disclosed by the invention can be adapted to walking on paddy fields and hard ground at the same time, and the telescopic legs are driven by the hydraulic system, that is, the manual hydraulic pump is used to provide power, and the mechanical energy is converted into the pressure energy of the 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 then the movement of the piston rod drives the expansion and contraction of the telescopic legs to form two different working states. The deformation wheel telescopic mechanism also has the characteristics of simple structure, high stability and easy cleaning.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is an overall structural diagram of the retracted state of the telescopic legs of the deformation wheel telescopic mechanism of the present invention.

FIG. 2 is an overall structural diagram of the extension state of the telescopic legs of the deformation wheel telescopic mechanism of the present invention.

Figure 3 is a structural diagram of the inner wheel rim.

Figure 4 is a diagram of the parts of the mounting bracket.

Figure 5 is a diagram of the parts of the support frame.

Figure 6 is a diagram of the leg parts.

Figure 7 is a diagram of the end cap parts.

Description of reference numerals: 1 outer rim; 2 hydraulic oil port I, hydraulic oil port II; 3 inner rim; 4 telescopic legs; 5 connecting parts; 6 round outer ring; 7 countersunk hole; 8 inner hexagon screw; 10 Piston rod; 11 Outrigger; 12 Spoke; 13 Hub; 14 Through hole; 15 Mounting bracket; 16 Inner ring oil passage gland II; 17 Inner ring oil passage gland I; 18 Support frame; 19 End cap ;20 Hex nut, spring washer and flat washer; 21 Flat; 22 Tapped hole; 23 Hydraulic cylinder; 24 Mounting bracket mounting hole; 25 Mounting bracket threaded hole; 26 Support bracket mounting hole; Base; 29 End Cap Base; 30 Threaded Through Hole; 31 Hexagonal Hole.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to design a deformation wheel telescopic mechanism with simple structure, which can change the working state and can be adapted to walking on paddy fields and hard ground at the same time.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 and FIG. 2 , the embodiment of the present invention provides a hydraulically driven deformation wheel telescopic mechanism, which is suitable for anti-skid and anti-sinking of various paddy field wheeled machinery, including micro-tillers, during paddy field operations, reducing sticky mud; the deformation wheel telescopic mechanism has two states, so that it can be adapted to the walking on paddy fields and hard ground at the same time; the present invention can realize driving on paddy fields and driving on hard roads without replacing the driving wheels of agricultural machinery, It has good passability, simple structure and high stability.

The deformation wheel telescopic mechanism based on hydraulic drive includes an outer rim 1, an inner rim 3, a hydraulic system, a telescopic leg 4, and a connecting part 5 for supporting and connecting; the outer rim 1 includes two circles made of aluminum alloy The two circular outer rings 6 are regularly machined with a lot of countersunk holes 7, and the countersunk holes 7 connect the outer rim 1 with the mounting frame 15 and the support rod 18 through the socket head cap screws 8.

The inner rim 3 is machined with eight planes 21 in a circular array, and threaded holes 22 are machined on the plane 21 to connect the fixed legs 11; For the hydraulic cylinders of the hydraulic system, the bottom and top of the eight cylinders are respectively machined with annular oil passage I and annular oil passage II, so that they communicate with each other; the inner rim 3 also includes an inner ring oil passage gland made of aluminum alloy. I17 and inner ring oil passage gland II16, annular oil passage I and annular oil passage II are respectively pressed by inner ring oil passage gland I and inner ring oil passage gland II.

The inner ring oil passage gland I17 and the inner ring oil passage gland II16 are divided into hydraulic oil port I and hydraulic oil port II2, and quick-change joints 9 are installed on the two hydraulic oil ports to facilitate connection with the manual hydraulic pump. The reversing valve on the pump can make the hydraulic oil port I and the hydraulic oil port II enter or return oil respectively, so as to realize the push-out and retraction of the telescopic leg 4; the hub 13 is machined with a circle of through holes 14 for connecting the flange. , In addition, the hub 13 is also processed with a hexagonal hole 31 for connecting with the output shaft of agricultural machinery such as a tiller.

The hydraulic system includes a hydraulic cylinder, a piston rod 10, a quick-change joint 9, a sealing ring, 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 passes through a hexagonal nut, a spring washer and a flat washer. 20 is connected with the telescopic leg 4, and the piston rod 10 in the hydraulic cylinder 23 is reciprocated by the flow of hydraulic oil in the hydraulic system, thereby driving the telescopic leg 4 to expand and contract; when it is necessary to walk on soft ground such as paddy fields, the external power source Press the hydraulic oil in the inner ring oil passage gland I into the inner ring oil passage gland II, the piston rod 10 moves outward along the hydraulic cylinder 23 under the pressure of the hydraulic oil, and drives the telescopic leg 4 connected to it at the same time. Extending out to form a walking wheel, after installing the corresponding shock absorbing element on the telescopic leg 4, the slip rate on the soft ground is greatly reduced, and the passing efficiency is improved at the same time. When it is necessary to walk on hard ground such as cement ground, change the flow direction of the oil inlet and outlet and the hydraulic oil, and the hydraulic oil in the inner ring oil passage gland II is pressed into the inner ring oil passage gland by the manual hydraulic pump of the power original. In I, the piston rod 10 moves inwards along the hydraulic cylinder 23 under the pressure of hydraulic oil, and at the same time drives the telescopic legs 4 connected to it to retract back, and the rim of the deforming wheel forms a complete circular surface. . After the corresponding rubber or shock absorbing element is installed on the telescopic leg 4, the smoothness of the deformation wheel when walking on the hard ground can be improved, and its vibration and noise can be reduced.

The telescopic legs 4 include eight rectangular frames made of aluminum alloys with the same size and shape; the rectangular frame is machined with two threaded through holes 30 from the outside to the inside in the thickness direction, which is convenient for later installation on the telescopic legs 4. form of wheel feet.

The connecting part 5 includes a mounting frame 15, a supporting frame 18, an end cover 19 and a leg 11; the mounting frame 15 is made of aluminum alloy, and the left and right sides of the mounting frame 15 are machined with mounting frame mounting holes 24. Fixed on the outer rim 1 , eight mounting brackets 15 are evenly distributed on the circumference of the rim, and the front and rear two circular outer rings 6 are connected together to form the outer rim 1 .

The support frames 18 are made of aluminum alloy and are installed on both sides of the telescopic legs 4 to play a fixed role and at the same time bear the radial force of the wheel to prevent the piston rod 10 from being subjected to bending moments. The installation distance of each pair of support frames 18 is slightly Greater than the thickness of the telescopic legs, to prevent the telescopic legs 4 from rubbing with the support frame 18 when they are stretched, reducing work efficiency and causing damage to the telescopic legs 4, the support frame 18 and other processed parts, the left and right ends of the support frame 18 are processed with support frame mounting holes 26 to pass through The hexagonal screws 8 are installed and fixed with the outer rim 1 , each telescopic leg 4 is fixed with a pair of support frames 18 , and the eight pairs of support frames 18 are evenly distributed on the circumference of the wheel rim.

The outriggers 11 are made of aluminum alloy, and the base 28 of each outrigger is machined with four outrigger fixing holes 27, which are connected to the threaded holes 22 on the inner rim 3 through bolts to fix the outriggers 11 on the inner rim 3, the other end of the outriggers 11 is processed into a bayonet shape to clamp the supporting frames 18 for fixed support, and each pair of supporting frames 18 corresponds to a pair of outriggers 11.

The piston rod 10 is connected with 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 the socket head cap screws, spring washers and flat washers. The piston rod 10, the end cover 19 and the hydraulic When the oil cylinder 23 is connected, a dustproof ring, a retaining ring, an O-ring and a combined seal are also installed to play the role of dustproof sealing.

When the telescopic leg 4 of the deformation 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 The threaded holes 25 and the threaded through holes 30 are used to install shock-absorbing materials such as rubber to improve the smoothness of the deforming wheel when walking on hard ground, and reduce its vibration and noise. All structures of the deformation wheel telescopic mechanism are sealed or painted to prevent corrosion, prolong service life and facilitate cleaning.

In this specification, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; There will be changes in the specific implementation manner and application scope of the idea of the invention. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A deformation wheel telescopic mechanism based on hydraulic drive, characterized in that it includes an outer rim, an inner rim, a hydraulic system, a telescopic leg, and a connecting component that supports and connects; the outer rim includes two aluminum alloys. The machined circular outer ring; the rim of the inner rim is machined with eight planes in a circular array, and the planes are machined with threaded holes for connecting the fixed legs; the hub and the spokes of the inner rim Internally 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, as well as hydraulic oil and an external manual hydraulic pump; one end of the piston rod is connected to the hydraulic cylinder. Inside the cylinder, one 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 expand and contract; when the piston rod is pushed out, the The telescopic legs of the deformation wheel telescopic mechanism are extended into the extended state. When the piston rod is retracted, the telescopic legs are driven to retract so that the rim of the deformation wheel forms a complete circular surface; the connecting components include a mounting frame, a supporting frame , end caps and outriggers; all the structures are sealed or painted to prevent corrosion, prolong service life and facilitate cleaning. 2 . The hydraulically driven deformation wheel telescopic mechanism according to claim 1 , wherein a plurality of countersinks are regularly machined on the two circular outer rings of the outer rim, and the countersunk holes pass through the outer rim. 3 . The inner hexagon screw connects and fixes the outer wheel rim with the mounting frame and the support rod. 3 . The deformation wheel telescopic mechanism based on hydraulic drive according to claim 1 , wherein the hub and the spokes of the inner rim are internally processed into a cavity structure as the hydraulic cylinder of the hydraulic system, 3 . There are eight in total, and the bottom and top of the eight oil cylinders are respectively machined with annular oil passage I and annular oil passage II to communicate with each other; the inner rim also includes an inner ring oil passage made of aluminum alloy The gland I and the inner ring oil passage gland II, 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. 4 . The deformation wheel telescopic mechanism based on hydraulic drive according to claim 3 , wherein the inner ring oil passage gland I and the inner ring oil passage gland II are respectively machined with hydraulic oil ports I and 2 . Hydraulic oil port II, quick-change joints are installed on the hydraulic oil port I and hydraulic oil port II to facilitate the connection with the manual hydraulic pump. Through the reversing valve on the manual hydraulic pump, the hydraulic oil port I and hydraulic oil port can be respectively II oil intake or oil return to realize the extension and retraction of the telescopic legs; the hub is also machined with a circle of through holes, which can be used to connect flanges, and the center of the hub is machined with hexagonal holes to facilitate connection with agricultural machinery Such as the output shaft connection of the tiller. 5 . The hydraulically driven deformation wheel telescopic mechanism according to claim 1 , wherein the telescopic legs comprise eight rectangular frames machined from aluminum alloys with the same size and shape; the rectangular frame There are threaded holes from the outside to the inside in the thickness direction of the machine, which is convenient for installing different forms of wheel feet on the telescopic legs later. 6 . The deformation wheel telescopic mechanism based on hydraulic drive according to claim 1 , wherein the mounting frame is made of aluminum alloy, and the left and right sides of the mounting frame are machined with mounting frame mounting holes. 6 . The mounting holes of the rack fix the mounting rack on the outer rim through the inner hexagon screw, and the eight mounting racks are evenly distributed on the circumference of the rim, and the front and rear circular outer rings are connected together to form the outer rim. 7 . The hydraulically driven deformation wheel telescopic mechanism according to claim 1 , wherein the support frame is made of aluminum alloy, and is installed on both sides of the telescopic leg for fixing and simultaneously. 8 . In order to bear the radial force of the wheel and prevent the piston rod from being subjected to bending moment, the left and right ends of the support frame are machined with support frame mounting holes to be fixed with the outer rim through hexagon socket screws, and 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. 8 . The hydraulically driven deformation wheel telescopic mechanism according to claim 1 , wherein the outriggers are made of aluminum alloy, and the base of each outrigger is machined with four outrigger fixing holes, 9 . The outrigger fixing holes are connected with the threaded holes on the inner rim by bolts, the outriggers are fixed on the inner rim, and the other end of the outriggers is processed into a bayonet shape to clamp the support frame to play the role of fixed support. Each pair of support brackets corresponds to a pair of legs. 9 . The deformation wheel telescopic mechanism based on hydraulic drive according to claim 1 , wherein the piston rod is connected to the hydraulic cylinder through an end cover, the end cover is made of aluminum alloy, and the end cover is made of hexagon socket. 10 . Screws, spring washers and flat washers are installed on the inner wheel rim, and when the piston rod, end cover and the hydraulic cylinder are connected, a dust ring, a retaining ring, an O-ring and a combined seal are also installed to function as dust seals. 10 . The deformation wheel telescopic mechanism based on hydraulic drive according to claim 1 , wherein when the telescopic legs of the deformation wheel telescopic mechanism are in a retracted working state, the support frame, the mounting frame and the The telescopic leg forms an almost complete circular surface; the mounting bracket and the outer side of the telescopic leg are respectively machined with mounting bracket threaded holes and threaded through holes for installing rubber and other shock-absorbing materials, which can improve the deformation wheel when walking on hard ground. Ride and reduce its vibration and noise.

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