Small excavator air inlet system and small excavator

Abstract

The utility model relates to the technical field of mini-excavators, and discloses a mini-excavator air inlet system, a mini-excavator and an air filter support, the mini-excavator air inlet system comprises a fixing part and a mounting part which are connected with each other, the air filter support is fixedly connected with a flitch through the fixing part, and the mounting part is located on the rear side of a radiator core and fixedly connected with an air filter through the mounting part; the air filter is arranged on the rear side of the radiator core body through the flitch and the air filter support, the space of a radiator cabin is fully utilized, a large-size air filter can be selected, the temperature of the radiator cabin is lower than that of an engine cabin, the air outlet density of the air filter is guaranteed, and then the working efficiency of an engine is guaranteed. The air filter is obliquely arranged, the installation model of the air filter is increased, and when the filter element is sucked, the working direction of the suction filter element is staggered from the position of the hydraulic oil tank, so that the hydraulic oil tank does not interfere with the working of the suction filter element.

Description

Technical Field

[0001] The utility model relates to the technical field of small excavators, in particular to an air intake system for a small excavator and the small excavator. Background Art

[0002] The air intake system of a small excavator is generally a combination of an air filter and related hoses. On a small excavator, the air entering the engine needs to be filtered first to remove solid impurities before entering the engine. Due to the limited installation space of the small excavator, the various structures on the small excavator should be arranged reasonably.

[0003] A utility model patent with authorization number CN212563496U discloses an air intake device for an excavator. This solution installs the air filter at the top of the engine. An air intake mesh pipe is installed at the end of the second intake pipe, away from the air filter. This mesh pipe is placed at the air inlet of the radiator, preventing contact between the air intake mesh pipe and the cover plate, thereby reducing noise. The inventors discovered that in this solution, due to the high temperature in the engine compartment, the air temperature after being treated by the air filter is high, reducing the density of the air entering the engine, thereby affecting engine efficiency. Furthermore, due to the limited space in the engine compartment of small excavators, only small-sized air filters can be used, which affects engine performance. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an air intake system for a small excavator and a small excavator, which uses a plate and an air filter bracket to tilt the air filter at the rear side of the radiator core, making full use of the radiator compartment space. A 7-inch large air filter can be selected, and the temperature of the radiator compartment is lower than that of the engine compartment, ensuring the air outlet density of the air filter and thus ensuring the working efficiency of the engine.

[0005] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] In a first aspect, an air intake system for a small excavator comprises:

[0007] A mounting plate, fixedly connected to the top surface of the radiator core;

[0008] The air filter bracket includes a fixing portion and a mounting portion that are connected to each other. The air filter bracket is fixedly connected to the mounting plate through the fixing portion. The mounting portion is located at the rear side of the radiator core and is fixedly connected to the air filter through the mounting portion.

[0009] The connecting steel pipe is fixed on the radiator sheet metal and passes through the radiator sheet metal. One end of the connecting steel pipe is connected to the air outlet end of the air filter through the first air intake pipe, and the other end is connected to the engine air intake end through the second air intake pipe.

[0010] As a further implementation, the plate is connected to the top surface of the radiator core by welding.

[0011] As a further implementation, a threaded hole is provided on the plate, and one end of the fixing portion is mounted on the threaded hole of the plate through a fixing piece.

[0012] As a further implementation, the air filter bracket is arranged in an L-shape, and a connection between the mounting portion and the fixing portion forms an angle.

[0013] As a further implementation, the fixing portion is a plate-shaped structure, and the plane of the fixing portion is parallel to the top surface of the radiator core.

[0014] As a further implementation, the mounting portion is a plate-shaped structure, and the plane of the mounting portion is tilted relative to the rear side of the radiator core so that the air filter is tilted relative to the rear side of the radiator core.

[0015] As a further implementation, the mounting portion is fixedly connected to the air filter via a fixing seat.

[0016] As a further implementation, the first air intake pipe and the second air intake pipe are sealedly connected to both ends of the connecting steel pipe.

[0017] As a further implementation, the first air intake pipe and the second air intake pipe are connected to the connecting steel pipe via a clamp and a sealing ring.

[0018] In a second aspect, a small excavator includes a body, and the body is provided with any of the above-described small excavator air intake systems.

[0019] The beneficial effects of the above utility model are as follows:

[0020] 1. The utility model utilizes a mounting plate and an air filter bracket to arrange the air filter at the rear side of the radiator core, making full use of the radiator compartment space. A 7-inch large air filter can be selected, and the temperature of the radiator compartment is lower than that of the engine compartment, ensuring the air outlet density of the air filter and thus ensuring the working efficiency of the engine. By arranging the air filter at an angle, the installation model of the air filter is increased, and when the filter element is extracted, the working direction of the filter element is staggered with the position of the hydraulic oil tank, and the hydraulic oil tank will not interfere with the extraction of the filter element.

[0021] 2. The utility model sets a connecting steel pipe on the radiator sheet metal, so that one end of the connecting steel pipe is connected to the air filter outlet end through the first air intake pipe, and the other end is connected to the engine intake end through the second air intake pipe, realizing a reasonable layout of the air intake pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 This is a schematic diagram of the overall structure of an air intake system for a small excavator according to an embodiment of the present utility model;

[0024] Figure 2 This is a partial structural diagram of an air intake system for a small excavator according to an embodiment of the present utility model;

[0025] Figure 3 It is a schematic diagram of the overall structure of the air filter bracket in the embodiment of the present utility model.

[0026] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0027] Among them: 1. Radiator core, 2. Radiator sheet metal, 3. Plate, 4. Air filter bracket, 5. Air filter, 6. Connecting steel pipe, 7. Second air intake pipe, 8. First air intake pipe, 41. Mounting part, 42. Fixing part, 43. Fixing seat, 44. Bolt assembly, 45. Angle. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] Example 1

[0030] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, an air intake system for a small excavator includes a plate 3, an air filter bracket 4, an air filter 5, and a connecting steel pipe 6. The air filter 5 is installed on the rear side of the radiator core through the plate 3 and the air filter bracket 4, and the air filter 5 is arranged at an angle, which ensures the performance of the engine while allowing the selection of a large-sized air filter 5.

[0031] Considering that the prior art installs the air filter 5 at the top of the engine in the engine compartment, which may easily cause a decrease in the engine intake density and a decrease in engine performance, this embodiment sets the air filter 5 at a radiator compartment position with a relatively low temperature to ensure engine performance.

[0032] like Figure 1As shown, the radiator structure includes a radiator sheet metal part 2 fixed to the radiator compartment, a radiator core 1 is installed on the rear side of the radiator sheet metal part 2, and the radiator core 1 is arranged near the rear end of the hood. The structure of the radiator is the existing technology.

[0033] The plate 3 is a square plate structure, which is welded to the middle position of the top surface of the radiator core. A plurality of bolt holes are provided on the plate 3, and the air filter bracket 4 is installed through the bolt holes and bolts.

[0034] like Figure 3 As shown, the structure of the air filter bracket 4 includes a mounting portion 41 , a fixing portion 42 , a fixing seat 43 , a bolt assembly 44 , and a folded angle 45 .

[0035] The mounting portion 41 and the fixing portion 42 of the air filter bracket 4 are connected to each other and arranged in an L-shape. The plane of the mounting portion 41 is perpendicular to the plane of the fixing portion 42 , and a corner 45 is formed at the connection between the mounting portion and the fixing portion.

[0036] One end of the fixing portion away from the mounting portion is mounted on the threaded hole of the mounting plate by a fixing member such as a bolt, so that the mounting portion extends to the rear side of the radiator core 1 .

[0037] like Figure 3 As shown, the fixing portion 42 is a plate-like structure, and the plane of the fixing portion 42 is arranged parallel to the top surface of the radiator core. The mounting portion 41 is also a plate-like structure, and the plane of the mounting portion 41 is inclined relative to the rear side of the radiator core. The straight line where the angle 45 is located is on the plane of the mounting portion 41.

[0038] The mounting portion 41 is used to mount the air filter 5. The mounting portion 41 is provided with bolt holes for mounting a fixing seat 43. The fixing seat 43 is fixedly connected to the air filter 5. The mounting surface of the fixing seat 43 is semicircular and cooperates with another semicircular clamping ring. The clamping ring is connected to the fixing seat 43 at both ends by bolt assemblies 44 to achieve fixed installation of the air filter 5. By tilting the mounting portion 41, the air filter 5 is tilted relative to the rear side of the radiator core 1, as shown in FIG. Figure 1 shown.

[0039] The cross-sectional area of ​​the radiator sheet metal 2 of this embodiment is larger than the cross-sectional area of ​​the radiator core 1. An opening is formed on the radiator sheet metal 2 on the peripheral side of the radiator core 1 and a connecting steel pipe 6 is installed through a bolt assembly. The connecting steel pipe 6 is fixed on the radiator sheet metal 2 and passes through the radiator sheet metal 2. One end of the connecting steel pipe 6 is connected to the outlet end of the air filter 5 through the first intake pipe 8, and the other end is connected to the intake end of the engine through the second intake pipe 7.

[0040] Among them, the first air intake pipe 8 and the second air intake pipe 7 are sealedly connected to both ends of the connecting steel pipe 6, and the first air intake pipe 8 and the second air intake pipe 7 are sealedly connected to the connecting steel pipe 6 through clamps and corresponding sealing rings.

[0041] This embodiment takes into account that due to the limited space in the engine compartment of a small excavator, only small-sized air filters can be selected, which affects the engine performance. By providing an air filter bracket 4, the mounting portion 41 of the air filter bracket is tilted relative to the rear of the radiator core 1, so that the air filter 5 can be arranged at an angle, making full use of the space in the radiator compartment, and a larger air filter 5 can be selected to improve the engine performance.

[0042] And considering that the subsequent air filter 5 needs to remove the filter element, if the air filter 5 is arranged parallel to the rear side of the radiator core 1, that is, the axis of the air filter 5 is parallel to the rear side of the radiator core 1, then the filter element removal work of the air filter 5 will be interfered with by the hydraulic oil tank structure on one side of the radiator core 1, which is inconvenient for the filter element removal work.

[0043] By arranging the air filter 5 at an angle, the installation model of the air filter 5 is increased, the engine performance is guaranteed, and when the filter element is extracted, the working direction of the filter element is staggered with the position of the hydraulic oil tank, and the hydraulic oil tank will not interfere with the operation of the filter element.

[0044] By arranging the air filter 5 at the position of the radiator core, the radiator compartment space is fully utilized, a 7-inch large air filter can be selected, and the temperature of the radiator compartment is lower than the temperature of the engine compartment, ensuring the air outlet density of the air filter 5 and thus ensuring the working efficiency of the engine.

[0045] Example 2

[0046] In a typical embodiment of the present invention, reference is made to Figure 1-Figure 3 As shown, a small excavator includes a body, and the small excavator air intake system of embodiment 1 is installed at the rear end of the body. By properly arranging the position of the air filter 5, a 7-inch large air filter can be selected to ensure the working efficiency of the engine.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A small excavator air intake system, characterized in that: include: A mounting plate, fixedly connected to the top surface of the radiator core; The air filter bracket comprises a fixing portion and a mounting portion which are connected to each other, the air filter bracket is fixedly connected to the mounting plate through the fixing portion, and the mounting portion is located at the rear side of the radiator core and is fixedly connected to the air filter through the mounting portion; The connecting steel pipe is fixed on the radiator sheet metal and penetrates the radiator sheet metal. One end of the connecting steel pipe is connected to the air outlet end of the air filter through the first air inlet pipe, and the other end is connected to the air inlet end of the engine through the second air inlet pipe.

2. The small excavator air intake system according to claim 1, characterized in that: The plate is connected to the top surface of the radiator core by welding.

3. A small excavator air intake system according to claim 1 or 2, characterized in that: The plate is provided with a threaded hole, and one end of the fixing portion is installed at the threaded hole of the plate through a fixing piece.

4. The air intake system for a small excavator according to claim 1, characterized in that: The air filter bracket is arranged in an L shape, and a corner is formed at the connection between the mounting portion and the fixing portion.

5. The small excavator air intake system according to claim 4, characterized in that: The fixing part is a plate-shaped structure, and the plane of the fixing part is parallel to the top surface of the radiator core.

6. The air intake system for a small excavator according to claim 4, characterized in that: The mounting portion is a plate-shaped structure, and the plane of the mounting portion is arranged obliquely relative to the rear side of the radiator core so that the air filter is arranged obliquely relative to the rear side of the radiator core.

7. The air intake system for a small excavator according to claim 1, characterized in that: The mounting portion is fixedly connected to the air filter via a fixing seat.

8. The air intake system for a small excavator according to claim 1, characterized in that: The first air inlet pipe and the second air inlet pipe are sealedly connected to both ends of the connecting steel pipe.

9. The small excavator air intake system according to claim 8, characterized in that: The first air intake pipe and the second air intake pipe are connected to the connecting steel pipe via a clamp and a sealing ring.

10. A small excavator, characterized in that: It comprises a machine body, on which is provided an air intake system for a small excavator as described in any one of claims 1 to 9.

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