WO2021232580A1

WO2021232580A1 - Reversing device for heat dissipation fan of harvester

Info

Publication number: WO2021232580A1
Application number: PCT/CN2020/104526
Authority: WO
Inventors: 王志平; 邢立成; 张俊成
Original assignee: 江苏沃得农业机械股份有限公司
Priority date: 2020-05-22
Filing date: 2020-07-24
Publication date: 2021-11-25
Also published as: CN111561380A

Abstract

A reversing device for a heat dissipation fan of a harvester, comprising an engine driving wheel (1), a transition wheel part (4), an intermediate wheel group (9), a tension wheel part (5), a heat dissipation fan assembly (7), and a belt group, the intermediate wheel group (9) being mounted on an intermediate wheel mounting frame (91). The device solves the problem that the whole machine is excessively wide due to the installation of a heat dissipation water tank and a dust screen outside an engine suction fan, thus preventing the harvester from hitting the ridge; and solves the problem of high engine temperature caused by dust screen blockage by dust, poplar, wheat ash, and the like due to continuous suction of the engine suction fan. The reversing device can achieve forward and reverse control by controlling a reversing tension push rod, thus enabling conveniently and quickly switch to the reverse state at any time.

Description

Reversing device for radiator fan of harvester

Technical field

The invention relates to the technical field of agricultural machinery, in particular to a reversing device for a radiator fan of a harvester.

Background technique

At present, when the harvesting machinery is working, the engine uses circulating water cooling to dissipate heat. The core of the cooling water tank is a rectangular aluminum heat sink structure. The water tank is equipped with a wind deflector. The moving air forms a high-speed airflow through the heat dissipation core of the water tank to cool the circulating water in the water tank. When the harvesting machinery is working, the environment is harsh, especially in summer when harvesting wheat. When the harvester is working, there are a lot of wheat ash, straw debris, and poplar, which will be absorbed by the suction fan on the dust-proof net cover of the water tank for a long time, blocking the dust-proof net. , Which affects the air circulation between the heat dissipation chips, resulting in high temperature of the engine.

Summary of the invention

The purpose of the present invention is to solve the above shortcomings of the prior art, and propose a reversing device for the radiator fan of the harvester, which includes an engine driving wheel, a transition wheel part, an intermediate wheel group, a tension wheel part, and a cooling fan assembly and Belt set, the intermediate wheel set is mounted on an intermediate wheel mounting frame; the tensioning wheel portion includes a tensioning wheel mounting plate, the tensioning wheel mounting plate is triangular in shape and the middle part is rotatably connected to the intermediate wheel On the mounting frame, the tension wheel mounting plate is provided with three end points, which are an upper connection point, a forward rotation connection point and a reverse connection point. The connection of the three end points is triangular and clockwise. The forward rotation connection point is installed with a forward rotation wheel set, and the reverse connection point is installed with a reverse rotation wheel set; the upper connection point is connected with the forward and reverse tension push rod mechanism, The forward and reverse tension push rod mechanism is rotatably connected with the frame of the harvester;

The belt set includes a constant direction belt, a change direction belt and a fan belt. The two ends of the constant direction belt are respectively sleeved on the intermediate wheel set and the driving wheel of the engine. The direction-changing belt is in the shape of a triangle and is respectively sleeved on the middle wheel set, the forward rotating wheel pair and the reversing wheel pair; the two ends of the fan belt are respectively sleeved on the middle wheel set and the heat sink The fan is assembled on the fan pulley; the forward rotation wheel pair is arranged on the inner side of the constant direction belt, the reverse rotation wheel pair abuts on the outer side of the constant direction belt; the transition wheel part abuts on the constant direction belt Up, and the location is close to the tensioner.

In order to better realize that the constant belt can closely contact the forward runner pair or the overturning wheel set, preferably, the transition wheel portion includes a positive pressure transition wheel support and a reverse pressure transition wheel support installed on the frame, A positive pressure transition wheel is installed on the positive pressure transition wheel support through the support shaft, a rotating connecting rod is sleeved on the support shaft, and a reverse pressure transition wheel is installed on the rotating connecting rod. The pressure transition wheel is connected with the back pressure transition wheel support through a tension spring.

In order to facilitate the rapid adjustment of the pressing force of the transition wheel set, preferably, a threaded tension screw is provided between the tension spring and the back pressure transition wheel support.

In order to ensure that the transition wheel part corresponds to the pressure of the tension wheel part, preferably, the positive pressure transition wheel is arranged on the inner side of the constant direction belt, and the back pressure transition wheel is arranged on the outer side of the constant direction belt.

Preferably, the diameter of the positive pressure transition wheel is larger than the diameter of the back pressure transition wheel.

In order to better realize the control effect of the forward and reverse tension push rod mechanism and avoid the tension push rod from being damaged by force in the running state, preferably, the forward and reverse tension push rod mechanism includes an electric push rod , A push rod bracket and a protective tube, the push rod bracket is installed at the front end of the electric push rod, the protective tube is coaxially installed in the push rod bracket, and an upper compression spring and a lower compression spring are sleeved on the protective tube, Both the upper end of the upper compression spring and the lower end of the lower compression spring are provided with a nylon protective block and an adjusting nut; the head of the protective tube is connected with a push rod rotating joint, and the push rod rotating joint is connected with the upper connecting point.

In order to better realize the transmission of the cooling fan, further, the intermediate wheel group includes a fan driving pulley, a direction changing pulley and a constant direction pulley. The fan pulley and the changing direction pulley pass through transmission The shafts are synchronously connected, and the constant direction pulley is installed at the end of the drive shaft through a bearing; the fan belt is sleeved on the fan driving pulley, the direction change belt is sleeved on the change direction pulley, and the constant direction pulley is sleeved on the constant direction pulley. belt.

Furthermore, the rotation center of the tension wheel mounting frame is located at the axis of the intermediate wheel set.

In order to facilitate the adjustment of the pressure between the reversing wheel set and the constant belt, further, a waist-shaped adjusting hole is provided at the reversing connection point, and the reversing wheel set is connected to the tensioning hole through the waist-shaped adjusting hole. The wheel mounting plates are connected.

In order to facilitate the control of the forward and reverse fan, further, the forward and reverse tension push rod mechanism is controlled by a button, and the forward and reverse tension push rod retracts after pressing the forward rotation button; after pressing the reverse rotation button Positive and negative tension push rod extends 150mm

Operation principle: The constant-direction belt is always in a counterclockwise running state, and the running direction of the reversing belt is controlled by the forward and reverse tensioning push rod mechanism:

When the positive and negative tension push rod is in the retracted state, the tension wheel mounting plate rotates clockwise around the center of rotation, and the positive runner presses the constant belt. Driven by the constant belt, the forward runner rotates clockwise and drives it The direction-changing belt rotates clockwise, and the direction-changing belt drives the fan clockwise through the intermediate wheel set;

When the positive and negative tension push rod is in the extended state, the tension wheel mounting plate rotates counterclockwise around the center of rotation, the reversing wheel pair presses the constant belt, and the reversing wheel pair rotates counterclockwise under the drive of the constant belt. Drive the direction-changing belt to rotate counterclockwise, and the direction-changing belt drives the fan to rotate counterclockwise through the intermediate wheel set;

Beneficial effects: (1) The forward and reverse rotation device of the radiating fan separates the radiating fan, and the water tank can not be confined to the outside of the engine, avoiding the problem of the whole machine being too wide dust cover to hit the ridge.

(2) When necessary, you can control the fan to blow the dust cover of the engine through the forward and reverse tension push rod to blow away the dust, straw, etc. adsorbed on the dust cover to avoid the engine suction fan due to continuous suction. High temperature of the engine after dust, poplar, wheat ash, etc. block the dust-proof net cover;

(3) The forward and reverse device can realize forward and reverse control by controlling the forward and reverse tension push rod, which is convenient and quick, and can be switched to the reverse state at any time.

Description of the drawings

Figure 1 is a front view of a heat dissipation structure in the background art;

Figure 2 is a side view of Figure 1;

Fig. 3 is a structural schematic diagram 1 of a forward and reverse rotation device for a radiator fan of a harvester (forward rotation state);

Figure 4 is a structural schematic diagram 2 of a reversing device for a radiator fan of a harvester (reversing state);

Figure 5 is a schematic diagram of the structure of the tensioning wheel part;

Figure 6 is a schematic diagram of the structure of the intermediate wheel set;

Figure 7 is a schematic diagram of the structure of the tension wheel push rod mechanism (contracted state);

Figure 8 is a second structural diagram of the tension wheel push rod mechanism (extended state);

Figure 9 is a first structural diagram of the transition wheel part;

Figure 10 is a second structural diagram of the transition wheel part;

Figure 11 is a schematic diagram of the transmission structure of Figure 3;

In the picture: 1-1, engine, 2-2, engine suction fan, 3-3, heat dissipation water tank, 4-4, water tank heat dissipation core, 5-5, dust-proof net cover;

1. Engine driving wheel, 2. Forward and reverse tension push rod mechanism, 21, electric push rod, 22, push rod bracket, 23, protective tube, 24, upper compression spring, 25, lower compression spring, 26, nylon guard Block, 27, rotating joint, 28, adjusting nut, 3, constant belt, 4, transition wheel part, 41, positive pressure transition wheel bracket, 42, back pressure transition wheel bracket, 43, bracket shaft, 44, positive pressure transition Wheel, 45, rotating connecting rod, 46, counter pressure transition wheel, 47, tension spring, 48, tension screw, 5, tension wheel part, 51, tension wheel mounting plate, 52, upper connection point, 53, positive Reversing connection point, 54, reverse connection point, 55, forward rotation wheel pair, 56, reverse rotation wheel pair, 57, waist adjustment hole, 6, direction changing belt, 7, cooling fan assembly, 71, fan pulley, 8 , Fan belt, 9, intermediate wheel group, 91, intermediate wheel mounting frame, 92 fan driving pulley, 93, variable direction pulley, 94, drive shaft, 95, constant direction pulley, 96, bearing.

Detailed ways

In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

As shown in Figure 3-11, a reversing device for the radiator fan of a harvester includes an engine driving wheel 1, a transition wheel part 4, an intermediate wheel group 9, a tension wheel part 5, a cooling fan assembly 7 and a belt group. The intermediate wheel set 9 is mounted on an intermediate wheel mounting frame 91; the tension wheel portion 5 includes a tension wheel mounting plate 51, the tension wheel mounting plate 51 is triangular in shape and the middle part is rotatably connected to On the intermediate wheel mounting frame 91, the tension wheel mounting plate 51 is provided with three end points, namely the upper connection point 52, the forward rotation connection point 53, and the reverse connection point 54. The connection of the three end points It is triangular in shape and arranged in a clockwise sequence. The forward connection point 53 is equipped with a forward rotation wheel set 55, and the reverse connection point is equipped with a reverse rotation wheel set 56; The reversing tension push rod mechanism 2 is connected, and the forward and reverse tension push rod mechanism 2 is rotatably connected with the frame of the harvester;

The belt set includes a constant direction belt 3, a change direction belt 6 and a fan belt 8. The two ends of the constant direction belt 3 are respectively sleeved on the intermediate wheel set 9 and the engine driving wheel 1, and are from the forward rotating wheel pair. And the gap between the reversing wheel pair; the direction-changing belt 6 in a triangular shape is respectively sleeved on the intermediate wheel group 9, the forward rotation wheel pair 55 and the reversing wheel pair 56; the fan belt 8 The two ends are respectively sleeved on the intermediate wheel set 9 and the fan pulley 71 of the cooling fan assembly 7; the forward rotating wheel pair 55 is arranged on the inner side of the constant belt 3, and the reversing wheel pair 56 abuts against the constant To the outside of the belt 3; the transition wheel portion 4 abuts on the constant belt 3 and is located close to the tension wheel portion 5.

In this embodiment, the transition wheel portion 4 includes a positive pressure transition wheel bracket 41 and a reverse pressure transition wheel bracket 42 installed on the frame, and the positive pressure transition wheel bracket 41 is mounted with a bracket shaft 43. Positive pressure transition wheel 44. A rotating connecting rod 45 is sleeved on the bracket shaft 43. A reverse pressure transition wheel 46 is installed on the rotating connecting rod 45. The reverse pressure transition wheel 46 passes through a tension spring 47. It is connected to the back pressure transition wheel bracket 42.

In this embodiment, a threaded tension screw 48 is provided between the tension spring 47 and the back pressure transition wheel bracket 42.

In this embodiment, the positive pressure transition wheel 44 is provided on the inner side of the constant direction belt 3, and the reverse pressure transition wheel 46 is provided on the outer side of the constant direction belt 3.

In this embodiment, the diameter of the positive pressure transition wheel 44 is larger than the diameter of the back pressure transition wheel 46.

In this embodiment, the forward and reverse tensioning push rod mechanism 2 includes an electric push rod 21, a push rod bracket 22, and a protective tube 23. The push rod bracket 22 is installed at the front end of the electric push rod 21, so The protective tube 23 is coaxially installed in the push rod bracket 22, the protective tube 23 is sleeved with an upper compression spring 24 and a lower compression spring 25, and the upper end of the upper compression spring 24 and the lower end of the lower compression spring 25 are both provided with The nylon protective block 26 and the adjusting nut 28; the head of the protective tube 23 is connected with a push rod rotating joint 27, and the push rod rotating joint 27 is connected with the upper connecting point 52.

In this embodiment, the intermediate wheel set 9 includes a fan driving pulley 92, a direction-changing pulley 93, and a constant-direction pulley 95. The fan pulley 92 and the direction-changing pulley 93 pass through a transmission shaft. 94 is synchronously connected, the constant direction pulley 95 is installed at the end of the drive shaft through the bearing 96; the fan belt 8 is sleeved on the fan driving pulley 92, the direction change belt 6 is sleeved on the change direction pulley 93, and the constant direction belt A constant belt 3 is sheathed on the wheel 95.

In this embodiment, the rotation center of the tension wheel mounting bracket 51 is located at the axis of the intermediate wheel set 9.

In this embodiment, the reversing connection point 54 is provided with a waist-shaped adjusting hole 57, and the reversing wheel set 56 is connected to the tensioning wheel mounting plate 51 through the waist-shaped adjusting hole.

In this embodiment, the forward and reverse tension push rod mechanism is controlled by a button, the forward and reverse tension push rod retracts after the forward rotation button is pressed; the forward and reverse tension push rod is pressed after the reverse rotation button is pressed Extend 150mm.

The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.

Claims

A reversing device for a radiator fan of a harvester, which is characterized in that it comprises an engine driving wheel, a transition wheel part, an intermediate wheel group, a tension wheel part, a cooling fan assembly and a belt group. The intermediate wheel group is installed in a The intermediate wheel mounting frame; the tensioning wheel portion includes a tensioning wheel mounting plate, the tensioning wheel mounting plate is triangular in shape and the middle part is rotatably connected to the intermediate wheel mounting frame, the tensioning wheel mounting plate There are three end points on the top, namely the upper connection point, the forward rotation connection point and the reverse connection point. The connection of the three end points is triangular and set in a clockwise order. The forward rotation connection point is installed There is a forward rotation wheel set, and the reversing connection point is installed with a reversing wheel set; the upper connection point is connected with the forward and reverse tension push rod mechanism, and the forward and reverse tension push rod mechanism is connected with Rotating connection of the frame of the harvester;

The belt set includes a constant direction belt, a change direction belt and a fan belt. The two ends of the constant direction belt are respectively sleeved on the intermediate wheel set and the driving wheel of the engine. The direction-changing belt is in the shape of a triangle and is respectively sleeved on the middle wheel set, the forward rotating wheel pair and the reversing wheel pair; the two ends of the fan belt are respectively sleeved on the middle wheel set and the heat sink The fan is assembled on the fan pulley; the forward rotation wheel pair is arranged on the inner side of the constant direction belt, the reverse rotation wheel pair abuts on the outer side of the constant direction belt; the transition wheel part abuts on the constant direction belt Up, and the location is close to the tensioner.
The reversing device for a radiator fan of a harvester according to claim 1, wherein the transition wheel portion includes a positive pressure transition wheel support and a reverse pressure transition wheel support installed on the frame, and the A positive pressure transition wheel is installed on the positive pressure transition wheel support through the support shaft, a rotating connecting rod is sleeved on the support shaft, and a back pressure transition wheel is installed on the rotating connecting rod. The wheel is connected with the back pressure transition wheel support through a tension spring.
The reversing device for the radiator fan of the harvester according to claim 2, wherein a tension screw with threads is provided between the tension spring and the back pressure transition wheel bracket.
The reversing device for the radiator fan of the harvester according to claim 2, wherein the positive pressure transition wheel is arranged on the inner side of the constant direction belt, and the reverse pressure transition wheel is arranged on the constant direction belt. Outside.
The reversing device for a radiator fan of a harvester according to claim 2, wherein the diameter of the positive pressure transition wheel is larger than the diameter of the reverse pressure transition wheel.
The reversing device for a radiator fan of a harvester according to claim 1, wherein the forward and reverse tension push rod mechanism includes an electric push rod, a push rod bracket and a protective tube, and the push rod The rod bracket is installed at the front end of the electric push rod, the protective tube is coaxially installed in the push rod bracket, the protective tube is sleeved with an upper compression spring and a lower compression spring, and the upper end of the upper compression spring and the lower compression spring The lower end is provided with a nylon protective block and an adjusting nut; the head of the protective tube is connected with a push rod rotating joint, and the push rod rotating joint is connected with the upper connecting point.
The reversing device for a radiator fan of a harvester according to claim 1, wherein the intermediate wheel group includes a fan driving pulley, a variable direction pulley, and a constant direction pulley, and the fan belt The wheel and the direction-changing pulley are synchronously connected by a transmission shaft, and the constant direction pulley is installed at the end of the transmission shaft through a bearing; a fan belt is sleeved on the fan driving pulley, and a direction-changing belt is sleeved on the direction-changing pulley , The constant belt is sleeved on the constant belt pulley.
The reversing device for the radiator fan of the harvester according to claim 1, wherein the rotation center of the tension wheel mounting frame is located at the axis of the intermediate wheel group.
The reversing device for a radiator fan of a harvester according to claim 1, wherein the reversing connection point is provided with a waist-shaped adjusting hole, and the reversing wheel set passes through the waist-shaped adjusting hole. Connect with the tensioner mounting plate.
The forward and reverse rotation device of the radiator fan of the harvester according to claim 1, wherein the forward and reverse tension push rod mechanism is controlled by a button. The rod retracts; the forward and reverse tension push rod extends 150mm after pressing the reverse button.