Air inlet pipe of CVT engine

Abstract

The utility model discloses an air inlet pipe of a CVT (continuously variable transmission) engine, which comprises an air inlet pipe main body, the air inlet pipe main body comprises a connecting part, the connecting part is connected with an engine box body, the air inlet pipe main body comprises a main pipeline, the main pipeline is communicated with the connecting part, and a water storage part is arranged at the tail part of the main pipeline along the gravity direction. And the water storage part is positioned below the connecting part. According to the engine box, the water storage part is arranged below the main pipeline, so that it can be guaranteed that inlet water in the main pipeline can be stored in the water storage part, meanwhile, the main pipeline communicates with the connecting part, inlet air in the main pipeline can be conveyed into the engine box through the connecting part, and the inlet air in the main pipeline can be conveyed into the engine box through the connecting part in the gravity direction. The water storage part is arranged below the connecting part, so that the water storage position is located below the air flow channel, and liquid is prevented from being brought in in the air inlet process.

Description

Technical Field

[0001] The utility model relates to the technical field of CVT engines, in particular to an air intake pipe of a CVT engine. Background Technique

[0002] The air intake pipe provided on a CVT engine needs to supply air to the engine. However, on a waterlogged road surface or in extreme weather, the air intake pipe will carry more or less some water vapor or water droplets during the air intake process. Therefore, water will enter the pipeline interior, and then enter the engine interior, thus affecting the working quality of the engine and even causing a water intake failure.

[0003] For example, the publication number "CN220118612U" discloses "the heat dissipation structure of an all-terrain vehicle". The CVT transmission case is connected to the air intake pipe, and the air outlet of the air outlet pipeline of the CVT transmission case faces the engine exhaust pipe; the air outlet pipeline of the CVT transmission case includes an air outlet pipe I, an elbow, and an air outlet pipe II connected in sequence. The elbow is higher than the air outlet pipe I and the air outlet pipe II, and the air outlet is located at the end of the air outlet pipe II. However, in practical applications, the setting of this type of air intake pipe cannot eliminate the influence of water intake on the engine, and the water droplets carried in the air intake or splashed during driving will enter the engine and affect the operation. Summary of the Invention

[0004] Aiming at the problem that the existing technology in the background technique has that the air intake pipe cannot prevent water, the utility model provides an air intake pipe of a CVT engine, which can reduce the amount of water entering the engine during the air intake process, and can store the water intake part in the water storage part, thus ensuring the stability of the engine operation.

[0005] To achieve the above object, the utility model adopts the following technical solutions.

[0006] An air intake pipe of a CVT engine includes an air intake pipe main body. The air intake pipe main body includes a connecting part, and the connecting part is connected to an engine box body. The air intake pipe main body includes a main pipeline, and the main pipeline is communicated with the connecting part. Along the gravity direction, a water storage part is arranged at the tail of the main pipeline, and the water storage part is located below the connecting part. In this application, by arranging the water storage part below the main pipeline, it can ensure that the water intake in the main pipeline can be stored in the water storage part, and at the same time, the main pipeline and the connecting part are communicated, so that the air intake in the main pipeline can be transmitted to the engine box body through the connecting part. Among them, along the gravity direction, the water storage part is arranged below the connecting part, so that the position of the stored water is below the air flow channel, avoiding bringing liquid during the air intake process.

[0007] Preferably, a water outlet is provided at the bottom of the water storage part, and a movable cover is detachably connected to the water outlet. By providing a water outlet at the bottom of the water storage part, the water in the water storage part can be discharged through the water outlet, thus preventing the water in the water storage part from overflowing into the connection part. In addition, a movable cover is provided on the water outlet, and the opening and closing of the movable cover can be manually controlled to drain water.

[0008] Preferably, the water outlet is a water outlet pipe, and the movable cover is a plug sleeve sleeved on the water outlet pipe, and a disassembly fastener is provided on the plug sleeve. By setting the water outlet as a water outlet pipe structure, the drainage can be made cleaner, preventing liquid from remaining in the water storage part, and facilitating the installation of the plug sleeve and the fastener, thereby improving the convenience of operation.

[0009] Preferably, the main pipeline includes an intermediate pipeline, and a fixed mounting seat is connected to the intermediate pipeline. By providing a fixed mounting seat on the intermediate pipeline, the positioning stability of the intermediate pipeline can be ensured.

[0010] Preferably, the intake pipe main body includes a plurality of offset pipe bodies, and an avoidance bending part is connected between each of the offset pipe bodies. Each of the offset pipe bodies is of a flat structure, and the pipe diameter of each of the offset pipe bodies is widened in the radial direction. By setting the intake pipe as a plurality of offset pipe bodies, with an avoidance bending part connecting between each of the offset pipe bodies, it can adapt to the installation positions of other components. And by flattening the offset pipes and widening the radial dimension, the intake air volume can be ensured while providing an avoidance space.

[0011] Preferably, a flexible joint sleeve is provided on the connection part. One end of the flexible joint sleeve is connected to the connection part, and the other end of the flexible joint sleeve is connected to the engine housing. By providing a flexible joint sleeve on the connection part, and connecting the engine housing and the connection part through the flexible joint sleeve, a buffering effect can be ensured, and it is convenient for disassembly and transportation in separate parts.

[0012] Preferably, a plurality of limiting strips are provided on the outer side of the flexible joint sleeve, and an installation groove is formed between each of the limiting strips, and a fastening belt is detachably connected to the installation groove. By providing limiting strips on the outer side of the flexible joint sleeve and an installation groove structure between the limiting strips, and adding a fastening belt to the installation groove, the connection stability between the flexible joint sleeve and the connection part or the engine housing can be strengthened.

[0013] Preferably, a positioning groove is provided inside the flexible joint sleeve, and a positioning protrusion is provided on one side of the connection part and / or the engine housing close to the flexible joint sleeve, and the positioning groove is snap-fitted with the positioning protrusion. By providing a positioning groove inside the flexible joint sleeve, and the positioning groove can be snap-fitted with the positioning protrusion, a pre-fixing effect between the flexible joint sleeve and the connection part or the engine housing can be achieved, ensuring the relative stability of their positioning.

[0014] Preferably, limiting ribs are provided on the connecting portion and / or the engine housing, and the limiting ribs abut against the flexible connection sleeve. The limiting ribs can abut against the flexible connection sleeve, thereby ensuring the installation position of the connecting portion and / or the engine housing relative to the flexible connection sleeve and ensuring the accuracy of installation.

[0015] Preferably, limiting blocks are provided inside the flexible connection sleeve, and the limiting blocks abut against the connecting portion and the engine housing. The limiting blocks can respectively abut against the connecting portion and the engine housing, so that the relative positioning distance between the connecting portion, the engine housing and the flexible connection sleeve is stable, and further the accuracy of the installation connection can be ensured.

[0016] The beneficial effects of the present utility model are as follows:

[0017] (1) It can reduce the amount of water and liquid entering the engine during the intake process, and store the water inlet part in the water storage part, thereby ensuring the stability of the engine operation;

[0018] (2) It can ensure the buffering effect between the intake pipe main body and the engine housing, reduce the vibration influence, and can be disassembled and transported separately, thereby reducing the production and transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an axonometric view of the present utility model.

[0020] Figure 2 is an axonometric view of the intake pipe main body in the present utility model.

[0021] Figure 3 is Figure 2 a partial enlarged view of part A in

[0022] Figure 4 is an exploded view of Embodiment 2.

[0023] Figure 5 is Figure 4 a partial enlarged view of part B in

[0024] Figure 6 is Figure 4 an axonometric view of the flexible pipe in

[0025] In the figure:

[0026] 1 intake pipe main body, 11 main pipe, 12 connecting portion, 13 water storage part, 131 water outlet opening, 132 movable cover, 133 water outlet pipe, 134 sleeve plug, 135 disassembly fastener, 14 intermediate pipe, 141 fixed mounting seat, 15 misaligned pipe body, 151 avoidance bending portion; 2 engine housing;

[0027] 3 flexible connection sleeve, 31 limiting strip, 32 installation groove, 33 fastening belt, 34 positioning groove, 35 limiting block;

[0028] 4 positioning protrusions;

[0029] 5 limiting ribs. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1:

[0032] like Figure 1 As shown, an intake pipe of a CVT engine includes an intake pipe body 1, which includes a connecting portion 12. The connecting portion 12 is connected to the engine housing 2. The intake pipe body 1 includes a main pipe 11, which is in communication with the connecting portion 12. A water reservoir 13 is provided at the tail end of the main pipe 11 in the direction of gravity, and the water reservoir 13 is located below the connecting portion 12. In the present application, by providing the water reservoir 13 below the main pipe 11, it is possible to ensure that the incoming water in the main pipe 11 can be stored in the water reservoir 13. At the same time, the main pipe 11 and the connecting portion 12 are connected, so that the incoming air in the main pipe 11 can be transmitted to the engine housing 2 through the connecting portion 12. The water reservoir 13 is provided below the connecting portion 12 in the direction of gravity, so that the water reservoir is located below the air flow path, thereby preventing liquid from being brought into the air intake process.

[0033] like Figure 2 、 3 As shown, the bottom of the water storage part 13 is provided with a water outlet 131, and the water outlet 131 is detachably connected to a movable cover 132. The water outlet 131 is a water outlet pipe 133, and the movable cover 132 is a sleeve plug 134 sleeved on the water outlet pipe 133, and the sleeve plug 134 is provided with a disassembly fastener 135.

[0034] A water outlet opening 131 is provided at the bottom of the water reservoir 13. Water in the water reservoir 13 can be drained through the water outlet opening 131, thereby preventing excess water from overflowing into the connecting portion 12. A movable cover 132 is provided over the water outlet opening 131, which is manually opened and closed to control water drainage. The configuration of the water outlet opening 131 as a water outlet pipe 133 ensures cleaner drainage, prevents residual liquid in the water reservoir 13, and facilitates installation of the sleeve plug 134 and fasteners, improving operational convenience.

[0035] like Figure 2 As shown, the main pipe 11 includes an intermediate pipe 14, and a fixed mounting seat 141 is connected to the intermediate pipe 14. The fixed mounting seat 141 is provided on the intermediate pipe 14, so as to ensure the positioning stability of the intermediate pipe 14 and thus ensure the uniformity of the overall positioning.

[0036] As shown Figure 2 in the figure, the intake pipe main body 1 includes several offset pipe bodies 15. There are avoidance bending parts 151 connected between the respective offset pipe bodies 15. Each of the offset pipe bodies 15 is of a flat structure, and the pipe diameter of each of the offset pipe bodies 15 is set to be widened radially. The intake pipe is set as multiple offset pipe bodies 15, and the respective offset pipe bodies 15 are connected by the avoidance bending parts 151, so as to be able to adapt to the installation positions of the other components. And the offset pipes are set to be flat, and the radial dimension is widened, so as to be able to ensure the intake air volume, and at the same time be able to provide an avoidance space.

[0037] In this embodiment, the assembly and working process of the intake pipe of the CVT engine are as follows: In this embodiment, there is a docking part for connecting the intake pipe main body 1 provided on the engine housing 2. In this embodiment, a split type is adopted between the intake pipe main body 1 and the engine housing 2, that is, a separated setting is adopted between the intake pipe main body 1 and the engine housing 2, and they are connected by a soft joint sleeve 3. The soft joint sleeve 3 is made of a soft material, but it also has a certain support hardness itself, so as to be able to ensure the shock absorption effect and provide a buffer space while ensuring the stable connection of the intake pipe main body 1 to the engine housing 2. Therefore, in this embodiment, since a split type is adopted between the intake pipe main body 1 and the engine housing 2, the cost control problem caused by integral casting is avoided. At the same time, since a split type is adopted, the intake pipe main body 1 and the engine housing 2 can be transported separately, avoiding damage to the connection relationship between the intake pipe and the engine housing 2 caused by transporting them integrally connected together.

[0038] Furthermore, in this embodiment, a filter screen is provided at one end of the intake pipe main body 1 away from the engine housing 2 to reduce the entry of impurities during the intake process. The intake pipe main body 1 presents a multi-bending structure, and the bending angles at each place are set to be bent at different angles according to the positions to be avoided by the other installation components. And in order to ensure that the intake pipe can fully avoid the other installation components, each part of the intake pipe main body 1 is set to be a flat structure according to the needs, and the radial dimension is widened, so as to ensure that the cross-sectional area meets the intake requirements, and further be able to achieve a stable intake air volume. At the same time, the flat setting can further avoid the components to be avoided.

[0039] At the same time, in this embodiment, the air intake pipe can achieve the effect of preventing water ingress, and the specific setting method is as follows: the main pipe 11 and the connecting portion 12 are arranged horizontally and vertically in an alternating manner, and a water storage portion 13 is provided at the bottom of the main pipe 11. In the direction of gravity, the water storage portion 13 is arranged below the connecting portion 12. Due to the high density of water, most of the water will directly drip into the water storage portion 13 during the intake process. Since the intake air can directly enter the connecting portion 12 from the main pipe 11 and then enter the interior of the engine case 2, it will not bring in too much water vapor, thereby ensuring the dryness of the intake air. In order to ensure the dryness inside the main pipe 11, it is necessary to drain the water in the water storage portion 13 in time. Therefore, in the water storage portion 13, A water outlet opening 131 is provided at the bottom, and a movable cover 132 is connected to the water outlet opening 131. In this embodiment, the water outlet opening 131 is a water outlet pipe 133 structure, a part of the pipe is extended downward, and a sleeve plug 134 is provided on the water outlet pipe 133. The sleeve plug 134 blocks the water outlet of the water pipe, and the designer has a disassembly fastener on the sleeve plug 134, wherein the disassembly fastener 135 is an elastic clamp structure, which can control the opening size of the elastic clamp by pressing the paddle, and the tightening force on the contact sleeve plug 134 can facilitate the removal of the sleeve plug 134 from the water outlet pipe 133. After the sleeve plug 134 is removed, the water inside the connecting part 12 is discharged to prevent excessive water from overflowing into the connecting pipe.

[0040] Example 2:

[0041] like Figure 4 As shown, unlike Example 1, in this embodiment, a flexible sleeve 3 is provided on the connecting portion 12, one end of the flexible sleeve 3 is connected to the connecting portion 12, and the other end of the flexible sleeve 3 is connected to the engine case 2. The flexible sleeve 3 is provided on the connecting portion 12, wherein the engine case 2 and the connecting portion 12 are connected via the flexible sleeve 3, thereby ensuring a buffering effect and facilitating separation and disassembly for transportation.

[0042] like Figure 5 、 6 As shown, a plurality of limiting strips 31 are provided on the outside of the flexible sleeve 3. Mounting slots 32 are formed between the limiting strips 31. Fastening strips 33 are detachably connected to the mounting slots 32. The limiting strips 31 are provided on the outside of the flexible sleeve 3, and the mounting slots 32 are formed between the limiting strips 31. By adding fastening strips 33 to the mounting slots 32, the connection stability between the flexible sleeve 3 and the connecting portion 12 or the engine case 2 is enhanced.

[0043] like Figure 5 、 6As shown, a positioning groove 34 is provided inside the flexible joint sleeve 3, and a positioning protrusion 4 is provided on the connecting portion 12 and / or the engine housing 2 close to the flexible joint sleeve 3. The positioning groove 34 is engaged with the positioning protrusion 4. A positioning groove 34 is provided inside the flexible joint sleeve 3, and the positioning groove 34 can be engaged with the positioning protrusion 4, so as to achieve the pre-fixing effect between the flexible joint sleeve 3 and the connecting portion 12 or the engine housing 2, and ensure the relative stability of the positioning of the two.

[0044] As Figure 5 shown, a limiting rib 5 is provided on the connecting portion 12 and / or the engine housing 2, and the limiting rib 5 abuts against the flexible joint sleeve 3. The limiting rib 5 can abut against the flexible joint sleeve 3, so as to ensure the installation position of the connecting portion 12 and / or the engine housing 2 relative to the flexible joint sleeve 3 and ensure the accuracy of installation.

[0045] As Figure 5 、 6 shown, a limiting block 35 is provided inside the flexible joint sleeve 3, and the limiting block 35 abuts against the connecting portion 12 and the engine housing 2. The limiting block 35 can abut against the connecting portion 12 and the engine housing 2 respectively, so as to make the relative positioning distance between the connecting portion 12, the engine housing 2 and the flexible joint sleeve 3 stable, and further ensure the accuracy of the installation connection.

[0046] The assembly and working process of the intake pipe of the CVT engine in this embodiment are as follows: In this embodiment, a docking part for connecting the intake pipe main body 1 is provided on the engine housing 2. In this embodiment, the intake pipe main body 1 and the engine housing 2 are arranged in a split manner, that is, the intake pipe main body 1 and the engine housing 2 are separated and connected by a flexible joint sleeve 3. The flexible joint sleeve 3 is made of a soft material, but it also has a certain support hardness, so as to ensure the stable connection of the intake pipe main body 1 to the engine housing 2 while ensuring the shock absorption effect and providing a buffer space. Therefore, in this embodiment, since the intake pipe main body 1 and the engine housing 2 are arranged in a split manner, the cost control problem caused by integral molding casting is avoided. At the same time, since it is arranged in a split manner, the intake pipe main body 1 and the engine housing 2 can be transported separately, avoiding damage to the connection relationship between the intake pipe and the engine housing 2 caused by transporting them connected together as a whole.

[0047] Furthermore, in this embodiment, a filter screen is provided at one end of the intake pipe main body 1 away from the engine housing 2, so as to reduce the entry of impurities during the intake process. The intake pipe main body 1 presents a multi-bend structure, and the bending angles at each place are set at different degrees according to the positions that need to be avoided by the remaining installation components. In order to ensure that the intake pipe can fully avoid the remaining installation components, each part of the intake pipe main body 1 is set into a flat structure according to needs and radially widened, so as to ensure that the cross-sectional area meets the intake requirements, and then a stable intake volume can be achieved. At the same time, the flat setting can further avoid the components that need to be avoided.

[0048] At the same time, in this embodiment, the intake pipe can achieve the effect of preventing water ingress. The specific setting method is as follows: The main pipe 11 and the connecting part 12 are arranged vertically and horizontally in a staggered manner, and a water storage part 13 is provided at the bottom of the main pipe 11. In the direction of gravity, the water storage part 13 is arranged below the connecting part 12. Since the water density is relatively large, during the intake process, most of the water will directly drip into the water storage part 13. Since the intake air can directly enter the connecting part 12 from the main pipe 11 and then enter the engine housing 2, too much water vapor will not be brought in, thus ensuring the dryness of the intake air. In order to ensure the dryness inside the main pipe 11, the water in the water storage part 13 needs to be drained in time. Therefore, a water outlet 131 is provided at the bottom of the water storage part 13, and a movable cover 132 is connected to the water outlet 131. In this embodiment, the water outlet 131 is of the structure of a water outlet pipe 133, which extends downward for a part of the pipe, and a sleeve plug 134 is provided on the water outlet pipe 133. The sleeve plug 134 blocks the water outlet of the water delivery pipe, and a disassembly fastener is designed on the sleeve plug 134. The disassembly fastener 135 is of an elastic clamp structure, and the opening size of the elastic clamp can be controlled by pressing the dial piece, so as to receive the tightening force from the contact sleeve plug 134, and then it is convenient to remove the sleeve plug 134 from the water outlet pipe 133. After removing the sleeve plug 134, the water inside the connecting part 12 can be drained to avoid too much water overflowing into the connecting pipe.

[0049] Further, the connection method between the intake pipe main body 1 and the engine housing 2 in this embodiment is as follows: In actual production applications, the flexible joint sleeve 3 can be set into a suitable shape according to the usage requirements, so that the intake pipe main body 1 can be set at any position according to the needs, thus avoiding interference with the other components of the vehicle and ensuring the flexibility of installation. In this embodiment, the flexible joint sleeve 3 is in a bent shape. The flexible joint sleeve 3 is a through-pipe structure. The two sides of the flexible joint sleeve 3 are respectively connected to the intake pipe main body 1 and the engine housing 2. A number of positioning grooves 34 are provided inside the flexible joint sleeve 3. The shape of the positioning grooves 34 is adapted to the shape of the positioning protrusions 4 on the connecting portion 12 and the engine housing 2. During the installation process, when the connecting portion 12 and the engine housing 2 are respectively sleeved with the flexible joint sleeve 3, the positioning protrusions 4 are snap-connected with the positioning grooves 34 inside the flexible joint sleeve 3, thereby ensuring the pre-fastening of the connection between the flexible joint sleeve 3 and the connecting portion 12 and the engine housing 2. Since the disconnection direction of the flexible joint sleeve 3 is in the axial direction, the connection stability between the positioning grooves 34 and the positioning protrusions 4 can be enhanced by annular arrangement. Further, a plurality of limiting strips 31 are provided on the outer side of the flexible joint sleeve 3. An installation groove 32 is formed between the limiting strips 31. A fastening belt 33 can be installed on the installation groove 32. In this embodiment, the fastening belt 33 is a tie structure that can set the contraction size, so as to further fasten and strengthen the connection stability of the flexible joint sleeve 3. When the fastening belt 33 is placed in the installation groove 32, the limiting strips 31 on both sides can limit and constrain the position of the fastening belt 33, thus ensuring the stable position of the fastening belt 33.

[0050] Further, in this embodiment, a limiting rib 5 is provided on the connecting portion 12. The limiting rib 5 is a protrusion provided on the connecting portion 12. When the connecting portion 12 is connected to the flexible joint sleeve 3, the limiting rib 5 can abut against the flexible joint sleeve 3, thereby helping to perform installation positioning and preventing the connection between the connecting portion 12 and the flexible joint sleeve 3 from exceeding the connection range, thus improving the unity of installation.

[0051] In this embodiment, a limiting block 35 is provided inside the flexible joint sleeve 3. In this embodiment, the flexible joint sleeve 3 is bent. Limiting blocks 35 are provided on both the inner and outer sides of the bend of the flexible joint sleeve 3. The set size of the limiting blocks 35 is adapted to the sizes required for docking the connecting portion 12 and the engine housing 2. That is, after the flexible joint sleeve 3 connects the engine housing 2 and the connecting portion 12, the limiting blocks 35 can respectively abut against the connecting portion 12 and the engine housing 2, thereby achieving the positioning effect.

Claims

1. An intake pipe of a CVT engine, comprising an intake pipe body (1), wherein the intake pipe body (1) comprises a connecting portion (12), wherein the connecting portion (12) is connected to an engine case (2), and wherein: The air intake pipe body (1) includes a main pipe (11), the main pipe (11) is connected to a connecting portion (12), and a water storage portion (13) is provided at the tail of the main pipe (11) in the direction of gravity, and the water storage portion (13) is located below the connecting portion (12).

2. The intake pipe of a CVT engine according to claim 1, characterized in that: A water outlet opening (131) is provided at the bottom of the water storage portion (13), and a movable cover (132) is detachably connected to the water outlet opening (131).

3. The intake pipe of a CVT engine according to claim 2, characterized in that: The water outlet opening (131) is a water outlet pipe (133), the movable cover (132) is a sleeve plug (134) sleeved on the water outlet pipe (133), and a disassembly fastener (135) is provided on the sleeve plug (134).

4. The intake pipe of a CVT engine according to claim 1, characterized in that: The main pipeline (11) includes an intermediate pipeline (14), and a fixed mounting seat (141) is connected to the intermediate pipeline (14).

5. The intake pipe of a CVT engine according to claim 1, characterized in that: The air intake pipe body (1) comprises a plurality of staggered tube bodies (15), each of the staggered tube bodies (15) is connected with an avoidance bending portion (151), each of the staggered tube bodies (15) is a flat structure, and the diameter of each of the staggered tube bodies (15) is radially widened.

6. An intake pipe for a CVT engine according to any one of claims 1 to 5, characterized in that: A flexible sleeve (3) is provided on the connecting portion (12), one end of the flexible sleeve (3) is connected to the connecting portion (12), and the other end of the flexible sleeve (3) is connected to the engine case (2).

7. The intake pipe of a CVT engine according to claim 6, characterized in that: A plurality of limiting strips (31) are arranged on the outside of the flexible sleeve (3), and mounting grooves (32) are formed between the limiting strips (31). A fastening belt (33) is detachably connected in the mounting groove (32).

8. The intake pipe of a CVT engine according to claim 6, characterized in that: A positioning groove (34) is provided inside the flexible sleeve (3), a positioning protrusion (4) is provided on the connecting portion (12) and / or the engine housing (2) near the flexible sleeve (3), and the positioning groove (34) is engaged with the positioning protrusion (4).

9. The intake pipe of a CVT engine according to claim 6, characterized in that: A limiting rib (5) is provided on the connecting portion (12) and / or the engine housing (2), and the limiting rib (5) abuts against the flexible connection sleeve (3).

10. The intake pipe of a CVT engine according to claim 6, characterized in that: A limiting block (35) is provided inside the flexible joint sleeve (3), and the limiting block (35) abuts against the connecting portion (12) and the engine case (2).

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