Air intake and exhaust device of engine

Abstract

The utility model discloses an engine air intake and exhaust device which comprises an air intake device, the air intake device comprises an air filter shell installed at an air inlet of an engine, the air filter shell is provided with an air outlet communicated with the air inlet of the engine, and a filter element is installed in the air filter shell. The air filter shell and the filter element in the air filter shell are arranged on one side with the axial direction of the air inlet of the engine as the center line in an offset mode. The problem that the filter element is damaged due to the high temperature of the engine exhaust device is solved.

Description

Technical Field

[0001] The utility model relates to an engine intake and exhaust device, belonging to the technical field of engines. Background Art

[0002] At present, in the structure of small air-cooled engine products, such as Figure 1 As shown, the intake device 1 of the whole machine is designed at the front end of the engine 10. The air filter structure of the existing intake device 1 is composed of parts such as the air filter seat 11, the filter element 12, and the upper shell 13. The filter element 12 is designed to be an elliptical or circular structure. The mounting plate is designed in the middle of the filter element 12. The support plate and the long bolt designed on the air filter seat 11 correspond to the central hole on the mounting plate of the filter element 12, and pass through the middle and are fixed by the clamping nut. At the same time, the air outlet 11a on the air filter seat 11 corresponds to the middle of the filter element 12. Such a structure forms the air outlet 11a arranged in the center of the filter element 12. The exhaust device 2 is designed on the adjacent side of the engine 10, so that the distance between the intake device 1 and the exhaust device 2 is relatively close. During the normal operation of the engine 10, the muffler of the exhaust device 2 generates a very high temperature, which produces a heating effect on the air filter 12 of the intake device 1, so that the engine 10 inhales a higher air to participate in the oil-gas mixed combustion of the whole machine, further affecting the whole machine performance and heat load of the engine. When the temperature of the muffler of the exhaust device 2 reaches several hundred degrees, the air filter seat 11 and the upper shell 13 are subjected to the temperature, which further causes the air filter seat 11 and the upper shell 13 to be severely deformed or damaged and fail. In more serious cases, it may cause air filter ablation. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an engine intake and exhaust device, which avoids the problem of filter element damage caused by the high temperature of the engine exhaust device.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: an engine intake and exhaust device, including an intake device, the intake device comprising:

[0005] An air filter housing installed at the engine air inlet, the air filter housing having an air outlet connected to the engine air inlet, a filter element installed in the air filter housing, the air filter housing and the filter element in the air filter housing being offset and arranged on one side with the axial direction of the engine air inlet as the center line;

[0006] The exhaust device of the engine is located on one side with the axial direction of the engine air inlet as the center line, and the air filter housing and the filter element in the air filter housing are biased to the other side with the axial direction of the engine air inlet as the center line, that is, arranged away from the exhaust device.

[0007] Furthermore, the air filter housing is provided with an air inlet on a side away from the air outlet, and the filter element is arranged between the air inlet and the air outlet.

[0008] Furthermore, a support assembly is installed in the air filter housing, and the filter element is installed on a side of the support assembly close to the air inlet.

[0009] Furthermore, in order to ensure the fixation and use of the filter element, the support assembly includes a support body and a sealing member arranged around the support body, the periphery of the filter element is tightly fitted inside the sealing member, and the sealing member is connected to the air filter housing.

[0010] Furthermore, the air filter housing comprises an air filter seat and an upper shell, and the support assembly is clamped between the air filter seat and the upper shell.

[0011] Furthermore, a step is provided on the periphery of the air filter seat away from the air outlet, a pressing frame is provided on the upper shell, and the support assembly is pressed between the step and the pressing frame.

[0012] Furthermore, the step includes a step vertical wall and a step transverse wall, the clamping frame includes a clamping connecting wall and a clamping transverse wall connected to the clamping connecting wall and extending laterally, the outer peripheral side of the support assembly abuts the step transverse wall, one side of the support assembly abuts the step vertical wall, and the other side of the support assembly abuts the clamping transverse wall.

[0013] Furthermore, the upper shell also includes a edging wall, and the edging wall is suitable for enclosing the step.

[0014] Furthermore, in order to provide auxiliary support for the filter element, the air filter housing is further provided on the inner side of the step with an auxiliary support wall extending in the transverse direction and abutting against the support assembly.

[0015] Furthermore, in order to strengthen the support of the filter element, a reinforcing support component is provided in the air filter housing between the filter element and the side wall where the air outlet is arranged, which directly or indirectly supports and reinforces the filter element.

[0016] Furthermore, the reinforcement support assembly includes a support member, and the support member is in a straight line shape, a cylindrical shape, or a cross shape.

[0017] Furthermore, in order to improve the filtering effect of the filter element, an auxiliary filtering structure is provided on the periphery of the air outlet in the air filter housing.

[0018] After adopting the above technical solution, the utility model has the following beneficial effects:

[0019] 1. The utility model sets the air filter housing and the filter element therein in an offset manner, and sets them to the other side of the engine air intake, that is, to the side away from the exhaust device. After such setting, the distance between the filter element and the muffler of the exhaust device is increased, so that the filter element of the air intake device is away from the muffler of the exhaust device, and further avoids the very high temperature of the muffler from heating the filter element of the engine air intake device, and further avoids the air filter, the air filter seat, and the upper shell from being seriously deformed or damaged and failing when the temperature of the muffler reaches several hundred degrees. In more serious cases, it may cause the air filter ablation phenomenon;

[0020] 2. The reinforcing support component installed between the air filter seat and the filter element can provide better support for the filter element in the middle part of the filter element under higher adsorption pressure.

[0021] 3. By setting up the auxiliary support wall, after the filter element is installed on the air filter seat, the auxiliary support wall further stabilizes the periphery of the filter element. Combined with the support assembly, it can achieve a full range of enhanced support for the filter element from the inside to the periphery;

[0022] 4. By setting up an auxiliary filtering structure, secondary auxiliary filtering can be performed on impurities that are not filtered out by the air filter element, further improving the filtering effect of the air filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an engine intake and exhaust device in the prior art;

[0024] Figure 2 Schematic diagram of the structure of the engine intake and exhaust device in the first embodiment;

[0025] Figure 3 is a schematic structural diagram of the engine intake and exhaust device of the second embodiment;

[0026] Figure 4 The structure of the air filter seat of the second embodiment is shown in FIG. Figure 1 ;

[0027] Figure 5 The structure of the air filter seat of the second embodiment is shown in FIG. Figure 2 ;

[0028] Figure 6 The structure of the air filter seat of the second embodiment is shown in FIG. Figure 3 . DETAILED DESCRIPTION

[0029] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0030] Embodiment 1: Figure 2 As shown, an engine intake and exhaust device, a portion of an exhaust device 2 of an engine 10 (which may be a muffler) is located on one side of the axial direction of the engine intake port 10a as the center line, and the engine intake and exhaust device includes an intake device 1, and the intake device 1 includes:

[0031] An air filter housing is installed at the engine air inlet 10a, and has an air outlet 11a connected to the engine air inlet 10a. A filter element 12 is installed in the air filter housing. The air filter housing and the filter element 12 in the air filter housing are biased to the other side of the axial direction of the engine air inlet 10a as the center line, that is, they are arranged away from the exhaust device 2.

[0032] In this embodiment, the filter element 12 may be arranged in a rectangular or square shape.

[0033] like Figure 2 As shown, the air filter housing is provided with an air inlet 13a on a side away from the air outlet, and the filter element 12 is arranged between the air inlet 13a and the air outlet 11a.

[0034] like Figure 2 As shown, in order to support the filter element 12, a support assembly is installed in the air filter housing, and the filter element 12 is installed on one side of the support assembly close to the air inlet 13a.

[0035] like Figure 2 As shown, the support assembly can be specifically structured as follows: it includes a support body 14 and a sealing member 15 disposed around the support body 14, specifically, the periphery of the support body 14 is embedded in the sealing member 15, the periphery of the filter element 12 is tightly fitted on the inner side of the sealing member 15, and the sealing member 15 is connected to the air filter housing. In this embodiment, the support body 14 can be a support net, but is not limited thereto.

[0036] like Figure 2 As shown, the air filter housing can specifically be the following structure: it includes an air filter seat 11 and an upper shell 13, and the support assembly is clamped between the air filter seat 11 and the upper shell 13; specifically, the seal 15 is tightly clamped between the air filter seat 11 and the upper shell 13; specifically, the air filter seat 11 and the upper shell 13 are connected, and bolts or buckles or other clamping structures arranged around the air filter seat 11 and the upper shell 13 connect the air filter seat 11 and the upper shell 13, and firmly press the filter element 12.

[0037] In the present embodiment, the air filter housing and the filter element 12 therein are eccentrically arranged, and are arranged toward the other side of the engine air intake 10a, that is, they are arranged away from the side of the exhaust device 2. After such arrangement, the distance between the filter element 12 and the muffler of the exhaust device 2 is increased, and the filter element 12 of the air intake device 1 is away from the muffler of the exhaust device 2, which further avoids the very high temperature of the muffler from heating the filter element 12 of the engine air intake device, and further avoids the muffler temperature reaching several hundred degrees. The filter element 12, the air filter seat 11, and the upper shell 13 are affected by the temperature, resulting in serious deformation or damage and failure of the air filter seat 11 and the upper shell 13, and in more serious cases, it will cause the air filter ablation phenomenon.

[0038] like Figure 2 As shown, a step 11b is provided on the periphery of the air filter seat 11 away from the air outlet 11a, a pressing frame 13b is provided on the upper shell 13, and the support assembly is pressed between the step 11b and the pressing frame 13b. The step 11b is at a certain distance or space from the air outlet 11a.

[0039] Specifically, Figure 2 As shown, the step 11b may specifically include a step vertical wall 11b1 and a step transverse wall 11b2, the clamping frame 13b may specifically include a clamping connecting wall 13b1 and a clamping transverse wall 13b2 connected to the clamping connecting wall 13b1 and extending laterally, the outer peripheral side of the seal 15 abuts the step transverse wall 11b2, one side of the seal 15 abuts the step vertical wall 11b1, and the other side of the seal 15 abuts the clamping transverse wall 13b2.

[0040] Specifically, Figure 2 As shown, the upper shell 13 may further include a circumferential wall 13c, and the circumferential wall 13c is suitable for surrounding the step 11b.

[0041] Embodiment 2: The structure of this embodiment is basically the same as that of embodiment 1, except that this embodiment also has the following structure: Figure 3 As shown, the air filter seat 11 may also be provided with an auxiliary support wall 11c on the inner side of the step 11b, which extends in the transverse direction and abuts against the support assembly.

[0042] By providing the auxiliary support wall 11c, after the filter element 12 is installed on the air filter seat 11, the auxiliary support wall 11c further stabilizes the periphery of the filter element 12, and combined with the support assembly, it can achieve an all-round strengthening support effect on the filter element 12 from the inside to the periphery;

[0043] In addition, if Figure 4 , 5 As shown in Figures 6 and 7, a reinforcing support component for directly or indirectly supporting and reinforcing the filter element 12 may be provided between the filter element 12 and the side wall where the air outlet 11a is provided in the air filter housing.

[0044] like Figure 4 , 5 As shown in FIG. 6 , the reinforcement support assembly includes a plurality of support members 3, and the support members 3 may be in the shape of a straight line, a cylinder, a cross, or other special-shaped cross-section structures, or a combination of the above shapes. The number of the support members 3 may be one, two, or more, and the arrangement shape between them may be orderly or disorderly.

[0045] In this embodiment, the support member 3 may be perpendicular to the support body 14 or may be arranged at a certain angle to the support body 14 .

[0046] In this embodiment, the reinforcement support assembly can be integrally designed on the air filter seat 11, or integrally designed on the support body 14. Of course, it can also be designed as a single structure and installed between the air filter seat 11 and the filter element 12. The reinforcement support assembly is used to provide better support for the filter element 12 so that the middle part of the filter element 12 can be stably supported under higher adsorption pressure.

[0047] like Figure 3 As shown, an auxiliary filtering structure 4 may be provided on the periphery of the air outlet 11a in the air filter housing. The auxiliary filtering structure 4 is a filter screen, which can perform secondary auxiliary filtering on impurities not filtered out by the filter element 12, thereby further improving the filtering effect of the filter element 12.

[0048] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An engine intake and exhaust device, characterized in that: The invention comprises an air intake device (1), wherein the air intake device (1) comprises: An air filter housing installed at an engine air inlet (10a), the air filter housing having an air outlet (11a) connected to the engine air inlet (10a), a filter element (12) installed in the air filter housing, the air filter housing and the filter element (12) in the air filter housing being offset and arranged on one side with the axial direction of the engine air inlet (10a) as the center line; The exhaust device (2) of the engine (10) is located on one side with the axial direction of the engine air inlet (10a) as the center line, and the air filter housing and the filter element (12) in the air filter housing are arranged on the other side with the axial direction of the engine air inlet (10a) as the center line, that is, away from the exhaust device (2).

2. The engine intake and exhaust device according to claim 1, characterized in that: The air filter housing is provided with an air inlet (13a) on a side away from the air outlet (11a), and the filter element (12) is arranged between the air inlet (13a) and the air outlet (11a).

3. The engine intake and exhaust device according to claim 2, characterized in that: A support assembly is installed in the air filter housing, and the filter element (12) is installed on a side of the support assembly close to the air inlet (13a).

4. The engine intake and exhaust device according to claim 3, characterized in that: The support assembly comprises a support body (14) and a sealing member (15) arranged around the support body (14); the periphery of the filter element (12) is tightly fitted inside the sealing member (15); and the sealing member (15) is connected to the air filter housing.

5. The engine intake and exhaust device according to claim 3, characterized in that: The air filter housing comprises an air filter seat (11) and an upper shell (13), and the support assembly is clamped between the air filter seat (11) and the upper shell (13).

6. The engine intake and exhaust device according to claim 5, characterized in that: A step (11b) is provided on the periphery of a side of the air filter seat (11) away from the air outlet (11a), a pressing frame (13b) is provided on the upper shell (13), and the support assembly is pressed between the step (11b) and the pressing frame (13b).

7. The engine intake and exhaust device according to claim 6, characterized in that: The step (11b) comprises a step vertical wall (11b1) and a step transverse wall (11b2); the pressing frame (13b) comprises a pressing connecting wall (13b1) and a pressing transverse wall (13b2) connected to the pressing connecting wall (13b1) and extending in the transverse direction; the outer peripheral side of the support component abuts against the step transverse wall (11b2); one side of the support component abuts against the step vertical wall (11b1); and the other side of the support component abuts against the pressing transverse wall (13b2).

8. The engine intake and exhaust device according to claim 7, characterized in that: The upper shell (13) further comprises a rim wall (13c), wherein the rim wall (13c) is suitable for enclosing the step (11b).

9. The engine intake and exhaust device according to claim 6, characterized in that: The air filter seat (11) is also provided with an auxiliary support wall (11c) on the inner side of the step (11b) which extends in the transverse direction and abuts against the support assembly.

10. The engine intake and exhaust device according to claim 1, characterized in that: A reinforcing support component is provided in the air filter housing between the filter element (12) and the side wall provided with the air outlet (11a), and is used to directly or indirectly support and reinforce the filter element (12); And / or an auxiliary filtering structure (4) is provided on the periphery of the air outlet (11a) in the air filter housing.

11. The engine intake and exhaust device according to claim 10, characterized in that: The reinforcement support assembly comprises a support member (3), and the support member (3) is in the shape of a straight line, a cylinder or a cross.

Images