Cylinder connecting structure

Abstract

The utility model provides a cylinder connecting structure which comprises a cylinder, an air inlet is arranged on the cylinder, an air inlet throat pipe is arranged on the air inlet, the air inlet throat pipe is used for being connected with an air inlet pipe, and a spring hoop is arranged on the air inlet throat pipe at the air inlet. The spring hoop can provide contractile force to provide pressure for the air inlet throat pipe so as to improve the sealing performance of connection between the air inlet throat pipe and the air inlet. When the pipe wall of the air inlet throat pipe is thinned due to continuous thermal expansion and cold contraction, the air inlet throat pipe can be tightly attached to the air inlet under the action of the contraction force of the spring hoop.

Description

Technical Field

[0001] The utility model relates to the technical field of gasoline engines, in particular to a cylinder connection structure. Background Art

[0002] A patent with the publication number CN 216665752 U discloses a handheld four-stroke gasoline engine, which includes: a body (equivalent to the cylinder in this application); a crankcase disposed inside the body, the crankcase is provided with a crankshaft connecting rod assembly and a piston assembly, the crankshaft connecting rod assembly is drivingly connected to the piston assembly, and an oil inlet passage is provided inside the crankshaft connecting rod assembly; a valve chamber disposed inside the body, the valve chamber communicates with the crankcase, and a control valve is provided at the connection between the valve chamber and the crankcase; a cam chamber disposed inside the body, the cam chamber communicates with the valve chamber; a valve chamber disposed inside the body, the valve chamber communicates with the cam chamber, and the valve chamber also communicates with the cam chamber through an oil return pipe; an oil storage chamber disposed inside the body, the oil storage chamber communicates with the crankcase through the oil inlet passage, and the oil storage chamber communicates with the cam chamber through an oil return passage.

[0003] The air inlet of the cylinder is connected to an air inlet pipe, and the sealing performance of the connection between the air inlet and the air inlet pipe directly affects whether the gasoline in the cylinder can burn fully. The air inlet pipe is generally made of nitrile rubber. When the cylinder is working, it is in a relatively high temperature state, and the temperature drops when it stops working. This causes the air inlet pipe to continuously heat up and cool down, resulting in the aging and shrinkage of the air inlet pipe, thereby reducing the sealing performance of the connection between the air inlet and the air inlet pipe. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a cylinder connection structure to improve the sealing performance of the connection between the air inlet and the air inlet pipe and increase the service life of the air inlet pipe.

[0005] A cylinder connection structure includes a cylinder, an air inlet is provided on the cylinder, an air inlet pipe is provided on the air inlet, the air inlet pipe is used to connect an intake pipe, and a spring clamp is provided on the air inlet pipe at the air inlet.

[0006] Through the above technical solution, the spring clamp can provide a contraction force to apply pressure to the air inlet pipe to improve the sealing performance of the connection between the air inlet pipe and the air inlet. When the wall thickness of the air inlet pipe becomes thinner due to continuous thermal expansion and contraction, it can also be closely attached to the air inlet under the contraction force of the spring clamp.

[0007] Preferably, a sealing ring is sleeved outside the air inlet pipe at the spring clamp.

[0008] Through the above technical solution, the spring clamp is wrapped by the sealing ring to reduce its contact with air, which can reduce the oxidation rate of the spring clamp and improve its service life.

[0009] Preferably, a first annular groove is formed on the air inlet pipe at the spring clamp.

[0010] Through the above technical solution, the spring clamp is located in the first annular groove, making the installation state of the spring clamp more stable.

[0011] Preferably, a second annular groove is formed on the air inlet, and an annular protrusion is arranged at a position corresponding to the second annular groove on the air inlet pipe. The annular protrusion and the first annular groove are located in the same plane.

[0012] Through the above technical solution, the annular protrusion cooperates with the first annular groove to further increase the sealing performance between the air inlet and the air inlet pipe.

[0013] Preferably, a first negative pressure hole is formed on the air inlet, a second negative pressure hole is formed on the air inlet pipe, the first negative pressure hole is communicated with the second negative pressure hole, a cylindrical groove is arranged on the first negative pressure hole, and a cylindrical protrusion matching the cylindrical groove is arranged on the air inlet pipe.

[0014] Through the above technical solution, the sealing performance at the connection of the first negative pressure hole and the second negative pressure hole can be increased.

[0015] Preferably, the spring clamp is made of carbon spring steel or stainless steel.

[0016] Through the above technical solution, selecting a spring clamp made of carbon spring steel can enable the spring clamp to provide sufficient contraction force to maintain the sealing performance of the connection between the air inlet pipe and the air inlet.

[0017] Preferably, the air inlet pipe is made of rubber.

[0018] Through the above technical solution, selecting an air inlet pipe made of rubber can improve the high-temperature resistance and anti-aging performance of the air inlet pipe.

[0019] Preferably, the air inlet and the cylinder are integrally manufactured.

[0020] Through the above technical solution, the connection strength between the air inlet and the cylinder is increased.

[0021] The beneficial effects of the present utility model are as follows:

[0022] 1. Increase the sealing performance between the air inlet and the air inlet pipe. When the air inlet pipe ages and loosens, the spring clamp continuously provides a tightening force to make it closely fit the air inlet, improving the service life of the air inlet pipe.

[0023] 2. A second annular groove and an annular protrusion are provided at the position where the air inlet contacts the side wall of the air inlet throat, improving the sealing performance on the side wall at the connection of the air inlet and the air inlet throat.

[0024] 3. A third groove and a raised block are provided at the position where the air inlet contacts the inside of the air inlet throat, improving the sealing performance between the top of the air inlet and the air inlet throat. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0026] Figure 1 is a schematic structural diagram of the present invention;

[0027] Figure 2 is a schematic structural diagram after the sealing ring is removed;

[0028] Figure 3 is a schematic structural diagram of the cylinder, i.e., the air inlet;

[0029] Figure 4 is a schematic structural diagram of the air inlet throat;

[0030] 1. Cylinder, 11. Air inlet, 111. Second annular groove, 112. First negative pressure hole, 113. Cylindrical groove, 12. Air inlet throat, 121. First annular groove, 122. Annular protrusion, 123. Second negative pressure hole, 124. Cylindrical protrusion, 13. Spring clamp, 14. Sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification. Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0032] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0033] Example 1

[0034] As shown Figures 1-4 A cylinder connection structure, including cylinder 1, on which an air inlet 11 is provided, and the air inlet 11 is integrally manufactured with the cylinder 1. An air inlet throat 12 is provided on the air inlet 11. The air inlet throat 12 is made of rubber (nitrile rubber is selected in this embodiment). The air inlet throat 12 is used to connect the intake pipe. A spring clamp 13 is provided on the air inlet throat 12 at the air inlet 11. The spring clamp 13 is made of carbon spring steel or stainless steel. A sealing ring 14 is sleeved outside the air inlet throat 12 at the spring clamp 13. The spring clamp 13 can provide a contraction force to provide pressure for the air inlet throat 12 to improve the sealing performance of the connection between the air inlet throat 12 and the air inlet 11. When the wall thickness of the air inlet throat 12 becomes thinner due to continuous thermal expansion and contraction, it can also be closely attached to the air inlet 11 under the action of the contraction force of the spring clamp 13. The sealing ring 14 wraps the spring clamp 13, reducing its contact with the air, which can reduce the oxidation rate of the spring clamp 13 and improve its service life.

[0035] A first annular groove 121 is provided on the air inlet throat 12 at the spring clamp 13. The spring clamp is placed in the first annular groove to make the installation state of the spring clamp more stable.

[0036] A second annular groove 111 is provided on the air inlet 11, and an annular protrusion 122 is provided at a position on the air inlet throat 12 corresponding to the second annular groove 111. The annular protrusion 122 and the first annular groove 121 are located in the same plane. The annular protrusion 122 cooperates with the first annular groove to improve the sealing performance at the joint of the side walls of the air inlet 11 and the air inlet throat 12.

[0037] A first negative pressure hole 112 is provided on the air inlet 11, and a second negative pressure hole 123 is provided on the air inlet throat 12. The first negative pressure hole 112 is communicated with the second negative pressure hole 123. A cylindrical groove 113 is provided on the first negative pressure hole 112, and a cylindrical protrusion 124 is provided on the air inlet throat 12 that cooperates with the cylindrical groove 113. This can increase the sealing performance at the joint of the first negative pressure hole and the second negative pressure hole.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A cylinder connection structure, characterized in that: The invention comprises a cylinder (1), wherein the cylinder (1) is provided with an air inlet (11), wherein the air inlet (11) is provided with an air inlet throat (12), wherein the air inlet throat (12) is used to connect to an air inlet pipe, and wherein a spring clamp (13) is provided on the air inlet throat (12) at the air inlet (11).

2. A cylinder connection structure according to claim 1, characterized in that: A sealing ring (14) is provided on the outer sleeve of the air intake pipe (12) at the spring clamp (13).

3. The cylinder connection structure according to claim 1, characterized in that: A first annular groove (121) is provided on the air intake pipe (12) at the spring clamp (13).

4. A cylinder connection structure according to claim 3, characterized in that: The air inlet (11) is provided with a second annular groove (111), and the air inlet throat (12) is provided with an annular protrusion (122) at a position corresponding to the second annular groove (111), and the annular protrusion (122) and the first annular groove (121) are located in the same plane.

5. The cylinder connection structure according to claim 1, characterized in that: The air inlet (11) is provided with a first negative pressure hole (112), the air inlet throat (12) is provided with a second negative pressure hole (123), the first negative pressure hole (112) is connected to the second negative pressure hole (123), the first negative pressure hole (112) is provided with a cylindrical groove (113), and the air inlet throat (12) is provided with a cylindrical protrusion (124) matching the cylindrical groove (113).

6. The cylinder connection structure according to claim 1, characterized in that: The spring hoop (13) is made of carbon spring steel or stainless steel.

7. The cylinder connection structure according to claim 1, characterized in that: The air intake pipe (12) is made of rubber.

8. The cylinder connection structure according to claim 1, characterized in that: The air inlet (11) and the cylinder (1) are manufactured integrally.

Images