Negative pressure heat dissipation structure of working vehicle

Abstract

The utility model provides a negative-pressure heat dissipation structure of a working vehicle. The negative-pressure heat dissipation structure comprises an engine; the cooling fan is arranged at the front end of the engine, and the cooling fan comprises a wind scooper; the transmission case is arranged at the rear end of the engine, the transmission case is provided with an air inlet pipe and an air outlet pipe, the air outlet pipe is communicated with the transmission case and the wind scooper, and the air inlet pipe extends from the transmission case and is communicated with the outside of the transmission case; the clutch assembly comprises a clutch shell and a first pressing disc, a dust discharging opening is formed in the radial outer end of the clutch shell, and a blade part protruding in the axial direction is arranged on the end face of the first pressing disc. Ventilation and heat dissipation of the clutch are effectively improved, the temperature of air in the clutch cavity is reduced, dust in the clutch cavity is discharged in time, the contact quality of a friction plate and a pressure plate is improved, and the service life of the clutch is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a negative pressure heat dissipation structure of a working vehicle. Background Art

[0002] In the prior art, the clutch chambers of traditional tractors are all fully enclosed structures with no air circulation. When the tractor is working normally, the temperature inside the clutch chamber can reach over 100 degrees Celsius. The clutch is in a closed high-temperature environment for a long time, the working conditions are poor, and the lack of ventilation and heat dissipation will cause the service life of the clutch to be significantly reduced. Thirdly, because the clutch chamber is a fully enclosed structure, the dust generated by the normal wear of the friction plate when the clutch is working has been accumulated in the clutch chamber and cannot be discharged outside the box. Excessive dust accumulation will affect the contact area between the friction plate and the pressure plate, and in severe cases will cause slippage. Therefore, it is necessary to provide a negative pressure heat dissipation structure for a work vehicle to overcome the above-mentioned defects. Utility Model Content

[0003] The utility model aims to provide a negative pressure heat dissipation structure for a working vehicle.

[0004] According to one aspect of the utility model, a negative pressure heat dissipation structure of a working vehicle is provided, comprising:

[0005] engine;

[0006] A cooling fan, the cooling fan being arranged at the front end of the engine, and the cooling fan comprising an air guide cover;

[0007] A transmission box, the transmission box is arranged at the rear end of the engine, the transmission box is provided with an air inlet pipe and an air outlet pipe, the air outlet pipe is connected with the transmission box and the air guide cover, and the air inlet pipe extends from the transmission box and is connected with the outside of the transmission box;

[0008] The clutch assembly includes a clutch housing arranged inside the transmission box and a first pressure plate arranged inside the clutch housing. The air outside the transmission box enters the transmission box from the air inlet pipe, passes through the clutch housing, and is discharged from the transmission box from the air outlet pipe to the air guide cover.

[0009] Preferably, the radial outer end of the clutch housing is provided with a dust discharge port, and the end surface of the first pressure plate is provided with a blade portion protruding in the axial direction.

[0010] Preferably, the air guide cover is arranged at one end close to the engine, and the air outlet pipe extends from the transmission box to one side of the engine and bends to extend forward in the horizontal direction to the air guide cover.

[0011] Preferably, the air inlet duct and the air outlet duct are respectively located on both lateral sides of the transmission box, the air inlet duct includes an air inlet at one end close to the clutch assembly, the air outlet duct includes an air outlet at one end close to the clutch assembly, and the air inlet, dust exhaust port and air outlet are connected.

[0012] Preferably, the air inlet duct extends outward from the transmission box, and includes a vertical portion located at one side of the transmission box and extending vertically upward, and a curved portion bent from the vertical portion toward the air outlet, and the curved portion is also provided with a filter.

[0013] Preferably, the air inlet and the air outlet are respectively located at two ends of the diameter of the clutch housing, and the air inlet is arranged below the air outlet in the vertical direction.

[0014] Preferably, the clutch housing includes a main body and a circumferential portion extending axially from the outer end of the main body, the dust exhaust port is arranged in the circumferential portion, the main body and the circumferential portion form a first cavity, and the first pressure plate is arranged in the first cavity.

[0015] Preferably, the clutch assembly further comprises a first driven plate, wherein the first driven plate is arranged between the first pressure plate and the main body, and the blade portion protrudes toward a side away from the first driven plate.

[0016] Preferably, the circumference of the first pressure plate is provided with a mounting portion protruding in the radial direction, the circumferential portion is provided with a mounting opening corresponding to the mounting portion, and the dust exhaust opening is provided between two adjacent mounting openings.

[0017] Preferably, the blade portion extends obliquely along the radial direction of the first pressure plate, and the inclination direction of the blade portion is opposite to the rotation direction of the clutch assembly.

[0018] Compared with the prior art, the negative pressure heat dissipation structure of the working vehicle provided by the utility model has the following beneficial effects:

[0019] It can significantly improve the ventilation and heat dissipation of the clutch, effectively reduce the air temperature inside the clutch cavity; and can timely discharge the dust inside the clutch cavity, improve the contact quality between the friction plate and the pressure plate, thereby increasing the service life of the clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] Figure 1 It is a three-dimensional diagram of the negative pressure heat dissipation structure of the working vehicle of the utility model;

[0022] Figure 2 This is a three-dimensional view from another perspective of the negative pressure heat dissipation structure of the working vehicle of the utility model;

[0023] Figure 3It is a cross-sectional view of the transmission box of the utility model;

[0024] Figure 4 It is an exploded view of the clutch assembly of the present utility model. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0027] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0028] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0031] See also Figure 1 , Figure 2 and Figure 3 The utility model provides a negative pressure heat dissipation structure of a working vehicle, comprising an engine 1, a heat dissipation fan 2 arranged at the front end of the engine 1, a transmission box 3 arranged at the rear end of the engine 1, and a clutch assembly 4 arranged in the transmission box 3. The heat dissipation fan 2 comprises an air guide 21 arranged at one end close to the engine 1 and a fan blade 22 arranged in the air guide 21. An air inlet duct 31 and an air outlet duct 32 are respectively arranged on both lateral sides of the transmission box 3. The air outlet duct 32 extends to the left side of the transmission box 3 and then extends forward to the air guide 21 in a horizontal direction after being bent. The air inlet duct 31 is arranged on the right side of the transmission box 3.

[0032] When the engine 1 is working, the blades 22 of the cooling fan 2 rotate to make the air flow from the back to the front to form an atmospheric negative pressure, and the negative pressure allows the normal temperature air to be sucked into the transmission box 3 through the air inlet pipe 31, and mixed with the high temperature air inside the transmission box 3, and the mixed hot air is then sucked out from the air guide cover 21 through the air outlet pipe 32. The utility model cools and dissipates the clutch assembly 4, thereby increasing the service life of the clutch.

[0033] See also Figure 3 The air inlet duct 31 extends outward from the transmission box 3, and the air inlet duct 31 includes a vertical portion 312 extending vertically upward and a curved portion 313 bent from the top of the vertical portion 312 and extending downward. The curved portion 313 is provided with a filter (not shown). The air inlet duct 31 includes an air inlet 311 located in the transmission box 3. The air outlet duct 32 includes an air outlet 321 located in the transmission box 3. In the vertical direction, the air outlet 321 is located above the air inlet 311. The air outlet 321 and the air inlet 311 are respectively located at both ends of the clutch assembly 4 in the diameter direction. The opening of the curved portion 313 is located directly above the air inlet 311.

[0034] See also Figure 4 The clutch assembly 4 includes a clutch housing 41, a first pressure plate 42 and a first driven plate 43. The clutch housing 41 includes a dust exhaust port 411, a main body 412 and a circumferential portion 413. The circumferential portion 413 extends axially from the outer end of the main body 412. The dust exhaust port 411 is arranged in the circumferential portion 413, and the dust exhaust port 411 extends radially. The main body 412 and the circumferential portion 413 form a first cavity 414. The first pressure plate 42 and the first driven plate 43 are arranged in the first cavity 414. The first driven plate 43 is located between the first pressure plate 42 and the main body 412.

[0035] The first pressure plate 42 is provided with a blade portion 421 protruding in the axial direction toward a side away from the main body 412. The blade portion 421 extends obliquely in the radial direction of the first pressure plate 42, and the inclination direction of the blade portion 421 is opposite to the rotation direction of the clutch assembly 4. The first pressure plate 42 is also provided with a mounting portion 422 protruding radially outward from the circumference. The circumferential portion 413 is provided with a mounting opening 4131 corresponding to the mounting portion 422. The mounting opening 4131 is recessed in the axial direction toward the main body 412 from one end away from the main body 412. The mounting portion 422 is inserted into the mounting opening 4131.

[0036] In this embodiment, the dust discharge port is arranged between two adjacent mounting ports, and three dust discharge ports are arranged between two adjacent mounting ports. The blade part will blow the dust in the clutch housing out of the clutch through the dust discharge port, thereby improving the contact quality between the friction plate and the pressure plate and increasing the service life of the clutch.

[0037] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A negative pressure heat dissipation structure for a working vehicle, characterized in that: include: engine; A cooling fan, the cooling fan being arranged at the front end of the engine, and the cooling fan comprising an air guide cover; A transmission box, the transmission box is arranged at the rear end of the engine, the transmission box is provided with an air inlet pipe and an air outlet pipe, the air outlet pipe is connected with the transmission box and the air guide cover, and the air inlet pipe extends from the transmission box and is connected with the outside of the transmission box; The clutch assembly includes a clutch housing arranged inside the transmission box and a first pressure plate arranged inside the clutch housing. The air outside the transmission box enters the transmission box from the air inlet pipe, passes through the clutch housing, and is discharged from the transmission box from the air outlet pipe to the air guide cover.

2. The negative pressure heat dissipation structure of the working vehicle according to claim 1, characterized in that: A dust discharge port is provided at the radial outer end of the clutch housing, and a blade portion protruding along the axial direction is provided at the end surface of the first pressure plate.

3. The negative pressure heat dissipation structure of the working vehicle according to claim 2, characterized in that: The air guide cover is arranged at one end close to the engine, and the air outlet pipe extends from the transmission box to one side of the engine and is bent and extends forward to the air guide cover in a horizontal direction.

4. The negative pressure heat dissipation structure of the working vehicle according to claim 3, characterized in that: The air inlet pipe and the air outlet pipe are respectively located on the two lateral sides of the transmission box. The air inlet pipe includes an air inlet at one end close to the clutch assembly, and the air outlet pipe includes an air outlet at one end close to the clutch assembly. The air inlet, the dust exhaust port and the air outlet are connected.

5. The negative pressure heat dissipation structure of the working vehicle according to claim 4, characterized in that: The air inlet duct extends outward from the transmission box, and includes a vertical portion located at one side of the transmission box and extending vertically upward, and a curved portion bent from the vertical portion toward the air outlet, and the curved portion is also provided with a filter.

6. The negative pressure heat dissipation structure of the working vehicle according to claim 5, characterized in that: The air inlet and the air outlet are respectively located at two ends of the clutch housing in the diameter direction, and the air inlet is arranged below the air outlet in the vertical direction.

7. The negative pressure heat dissipation structure of the working vehicle according to claim 6, characterized in that: The clutch housing includes a main body and a circumferential portion extending axially from the outer end of the main body, the dust exhaust port is arranged on the circumferential portion, the main body and the circumferential portion form a first cavity, and the first pressure plate is arranged in the first cavity.

8. The negative pressure heat dissipation structure of the working vehicle according to claim 7, characterized in that: The clutch assembly further includes a first driven plate, which is disposed between the first pressure plate and the main body, and the blade portion protrudes toward a side away from the first driven plate.

9. The negative pressure heat dissipation structure of the working vehicle according to claim 8, characterized in that: The circumference of the first pressure plate is provided with a mounting portion protruding in the radial direction, the circumferential portion is provided with a mounting opening corresponding to the mounting portion, and the dust exhaust opening is arranged between two adjacent mounting openings.

10. The negative pressure heat dissipation structure of the working vehicle according to claim 9, characterized in that: The blade portion extends obliquely along the radial direction of the first pressure plate, and the inclination direction of the blade portion is opposite to the rotation direction of the clutch assembly.

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