Motorcycle throttle body sealing structure

Abstract

The invention discloses a motorcycle throttle valve body sealing structure which comprises a valve body, the valve body comprises an air inlet cylinder, a throttle valve turning plate and a control base, a sealing connector is arranged at the air inlet position of the valve body, a transmission mechanism is arranged on the valve body, and through a telescopic structure of a drawing pipe and a dynamic pressure adjusting mechanism of a linkage plate, the sealing connector is connected with the transmission mechanism. Improvement of traditional flange sealing is achieved, the sealing structure achieves dynamic self-compensation and disassembly-free maintenance capacity, when the pressing force of the sealing ring is reduced due to long-term thermal aging, vibration abrasion or material creep deformation, disassembly through any tool is not needed, only the position of the linkage plate needs to be finely adjusted through a motor driving transmission mechanism, and the sealing ring can be disassembled conveniently. The axial pressing force on the sealing ring can be steplessly increased within the linear range, the initial sealing state is instantly recovered or even exceeded, the relative displacement of a connecting piece caused by working condition changes such as engine thermal expansion can be counteracted in real time, the permanent deformation of the sealing ring can be actively compensated through periodic micro-adjustment, and therefore the sealing service life is prolonged by multiple times.

Description

Technical Field

[0001] This invention relates to the field of transmission device parts technology, specifically a sealing structure for a motorcycle throttle body. Background Technology

[0002] The throttle body of a motorcycle is the core valve that controls the amount of air entering the engine. Its function is to allow the rider to adjust the opening of the throttle flap by operating the throttle lever, thereby precisely controlling the airflow into the engine cylinders, which in turn determines the fuel injection quantity and the engine's output power and speed. The throttle body sealing structure is a sealing component installed at the connection between the throttle body and components such as the intake manifold, idle bypass valve, and sensors. Its core function is to ensure the absolute airtightness of the intake passage, preventing unfiltered air or vacuum leakage, thus ensuring the accuracy of intake air volume measurement, idle speed stability, fuel-air ratio control precision, and avoiding engine vibration, power loss, or malfunction indicator lamp illumination caused by air leakage.

[0003] In the prior art, publication number "CN215486287U" discloses a motorcycle throttle body sealing structure. The throttle shaft is rotatably installed in a through hole to control the opening and closing angle of the valve. A thrust spring is installed between the housing and the throttle shaft. The thrust spring can tighten the throttle shaft to maintain a seal. The sealing assembly includes a shaft retaining ring, a sliding washer, and a retaining washer. The retaining washer is installed in the mounting seat. The shaft retaining ring is engaged with the throttle shaft and located on one side of the retaining washer. The sliding washer is installed between the shaft retaining ring and the retaining washer. The shaft retaining ring is assembled onto the throttle shaft, and the retaining washer restricts the position of the sliding washer. Firstly, the retaining washer has better wear resistance than the aluminum alloy material of the housing and will not rub against the housing itself. Secondly, the friction between the retaining washer and the sliding washer improves the wear resistance and makes the device last longer.

[0004] However, existing technologies still have significant shortcomings, such as: In the aforementioned devices and existing technologies, the traditional motorcycle throttle body sealing structure mainly relies on flange bolts to tighten and fix the gasket. Its rigid connection cannot compensate for the permanent deformation of the gasket and the attenuation of bolt preload caused by long-term thermal cycling, vibration and material aging. This results in a continuous decrease in the sealing interface clamping force, leading to chronic air leakage. Moreover, once a leak occurs, the machine must be stopped and the entire intake pipe assembly must be disassembled to replace the gasket, making the maintenance process cumbersome and time-consuming. Summary of the Invention

[0005] The purpose of this invention is to provide a sealing structure for a motorcycle throttle body to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a motorcycle throttle body sealing structure, comprising a valve body, the valve body including an air intake cylinder, a throttle flap and a control base, a sealing joint being provided at the air intake position of the valve body, and a transmission mechanism being provided on the valve body; The sealing joint includes a pull-out tube and a linkage plate, and a fixing plate and an air inlet tube are provided near the linkage plate. The transmission mechanism includes a connecting rod, the surface of which is provided with a threaded section, and both the linkage plate and the fixing plate are sleeved on the surface of the connecting rod.

[0007] Preferably, the throttle flap is located inside the air chamber of the intake cylinder, and the throttle flap is movably connected to the inside of the intake cylinder.

[0008] Preferably, the air intake cylinder is located on the top surface of the control base, and the gear structure inside the control base is linked with the throttle flap.

[0009] Preferably, both the air outlet portion of the pull-out tube and the air inlet portion of the air inlet cylinder are fixed with connecting plates, and the two connecting plates are fixed together by bolts.

[0010] Preferably, the pull-out tube is a stretchable and retractable corrugated tube, and one end of the pull-out tube is connected and fixed with a flat-mouth connector, and the linkage plate is fixed to the flat-mouth connector.

[0011] Preferably, a sealing ring is fixed on the side of the fixing plate adjacent to the pull tube, and the two sealing rings are tightly attached to each other.

[0012] Preferably, the flat-mouth connector is horizontally aligned with the air intake pipe, and the two are interconnected.

[0013] Preferably, the connecting rods are all located within the interfaces on both sides of the front of the fixing plate and the linkage rod, and the fixing plate is connected to one end of the connecting rod by a bearing, and the linkage plate is threaded to the threaded section of the connecting rod.

[0014] Preferably, the end of the connecting rod extends to the back of the air intake cylinder, and a limiting head is provided at one end of the connecting rod, with the limiting head located at the front of the fixing plate.

[0015] Preferably, the bottom of the connecting rod is provided with a transmission rod, and the top end of the transmission rod and the end end of the connecting rod are respectively equipped with bevel gears, and the bottom of the control base is provided with a gear set.

[0016] Compared with the prior art, the beneficial effects of the present invention are: By utilizing the telescopic structure of the pull-out tube and the dynamic pressure adjustment mechanism of the linkage plate, improvements have been made to traditional flange seals. This enables the sealing structure to achieve dynamic self-compensation and maintenance-free operation. When the sealing ring experiences a decrease in clamping force due to long-term thermal aging, vibration wear, or material creep, disassembly can be performed without any tools. Simply adjust the position of the linkage plate via the motor-driven transmission mechanism to steplessly increase the axial clamping force on the sealing ring within a linear range, instantly restoring or even exceeding the initial sealing state. This can offset the relative displacement of connecting parts caused by changes in operating conditions, such as engine thermal expansion, in real time. Furthermore, it can actively compensate for permanent deformation of the sealing ring through periodic micro-adjustments, thereby extending the seal life several times over and eliminating chronic air leakage caused by loose bolt tightening or gasket failure. Throughout the engine's entire lifespan, it maintains constant airtightness at the connection between the throttle body and the intake port, ensuring accurate air-fuel ratio control and improving power response and emission stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall device in this invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is an axonometric drawing of the present invention; Figure 4 This is a side view of the present invention; Figure 5 This is a front view of the present invention; Figure 6 This is a top view of the present invention; Figure 7 This is a diagram showing the connection of the pull-out tube in this invention; Figure 8 This is a structural diagram of the invention.

[0018] In the diagram: 1. Valve body; 11. Intake cylinder; 12. Throttle flap; 13. Control base; 2. Sealing joint; 21. Connecting plate; 22. Pull-out tube; 23. Plain end joint; 24. Linkage plate; 25. Sealing ring; 26. Air inlet pipe; 27. Fixing plate; 3. Transmission mechanism; 31. Connecting rod; 32. Threaded section; 33. Limiting head; 34. Bevel gear; 35. Transmission rod; 36. Gear set. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-8 The present invention provides a technical solution: Example 1: A motorcycle throttle body sealing structure: Includes a valve body 1, which comprises an intake manifold 11, a throttle flap 12, and a control base 13. The throttle flap 12 is located within the air chamber of the intake manifold 11 and is movably connected to the inside of the intake manifold 11. The intake manifold 11 is located on the top surface of the control base 13, and the gear structure inside the control base 13 is linked with the throttle flap 12. The valve body 1 is the motorcycle throttle, a core valve controlling the engine's intake air volume. It is installed between the air filter and the engine intake manifold, precisely adjusting the airflow into the cylinder by changing the valve opening, thereby matching the fuel injection quantity under different operating conditions, ultimately controlling the engine's speed, torque, and power output. The driver operates the throttle... The throttle lever, driven by a cable or electrical signal, rotates the throttle flap 12, increasing or decreasing the cross-sectional area of ​​the intake passage. After the ECU obtains the signal of the amount of air entering, it calculates the corresponding fuel injection amount based on the preset air-fuel ratio, achieving precise control of the air-fuel mixture ratio. At idle speed, the flap is almost closed, and the idle bypass valve controlled by the ECU provides a small amount of air to maintain operation. During acceleration, the flap opening increases, the intake volume increases sharply, and the ECU simultaneously increases fuel injection, enabling the engine to output strong power. This achieves precise management of the engine's breathing rhythm. The valve body 1 includes, but is not limited to, the intake cylinder 11; the throttle flap and the control base 13. The control base 13 includes mechanical transmission structures such as gears and motors, used to control the opening and closing size of the throttle flap within the intake cylinder 11 to make it flip.

[0021] The valve body 1 is the core mechanical assembly of the motorcycle throttle. Its intake cylinder 11, which serves as the airflow channel, is a precision-cast aluminum alloy part with a smooth inner wall to ensure smooth airflow. The valve flap, as a key actuator, is suspended in the center of the intake cylinder 11 via a rotating shaft. Its circular or elliptical design allows for stepless adjustment of the airflow cross-sectional area during rotation. The control base 13 integrates an electromechanical transmission system. In the traditional cable-operated structure, it includes a cable disc and a return spring. The valve body 1 is an electronic throttle. The control base 13 incorporates a micro gearbox and a servo motor. The ECU sends pulse signals to drive the motor gear set 36, converting electronic control commands into precise angular displacement of the throttle shaft. This achieves millisecond-level closed-loop control of the flap opening. The entire valve body 1 works in concert with high-precision bearings, sealing rings, and sensors to translate driving intentions into precise physical openings, ultimately achieving digital and precise management of the engine's intake airflow.

[0022] A sealing joint 2 is provided at the air inlet of the valve body 1, and a transmission mechanism 3 is provided on the valve body 1. Normally, the valve body 1 and the air inlet are fastened together using a flange bolt and a sealing gasket. Corresponding flanges with bolt holes are machined on the end faces of the air inlet and the air inlet of the valve body 1, respectively. A layer of oil-resistant and heat-resistant rubber or silicone sealing gasket is sandwiched between the two. The gasket is tightened with evenly distributed bolts, causing it to deform under pressure and fill all microscopic unevenness, thus forming a reliable airtight connection. However, traditional sealing connection methods are prone to weakening of the sealing effect over time due to prolonged use of the sealing gasket. In some cases, air leakage may occur. Since the flange is not movable, it needs to be disassembled and replaced when the seal fails, which is quite troublesome. Therefore, the sealing connection structure of the transmission is changed by adding a pull-out tube 22. The pull-out tube 22 is equivalent to the link between the valve body 1 and the motorcycle air intake. The pull-out tube 22 can be pulled out and retracted to change its length. A sealing ring 25 is installed at both the linkage plate 24 of the pull-out tube 22 and the fixing plate 27 of the air intake pipe 26. The movement of the linkage plate 24 can adjust the degree of compression between it and the sealing ring 25 on the fixing plate 27 to adjust the sealing performance.

[0023] The sealing joint 2 includes a pull-out tube 22 and a linkage plate 24. A fixing plate 27 and an air inlet pipe 26 are located near the linkage plate 24. Connecting plates 21 are fixed to both the outlet portion of the pull-out tube 22 and the inlet portion of the air inlet cylinder 11, and the two connecting plates 21 are fixed together by bolts. The pull-out tube 22 is a stretchable and retractable corrugated pipe. A flat-mouth connector 23 is fixed to one end of the pull-out tube 22, and the linkage plate 24 is fixed to the flat-mouth connector 23. Sealing rings 25 are fixed to the side of the fixing plate 27 adjacent to the pull-out tube 22, and the two sealing rings 25 are tightly fitted together. The flat-mouth connector 23 is horizontally aligned with the air inlet pipe 26. Furthermore, the two are interconnected. One end of the air inlet pipe 26 of the valve body 1 and the end of the pull-out pipe 22 are both fixed with connecting plates 21, which are bolted together. One end of the pull-out pipe 22 is a flat connector 23, which facilitates connection and fixation with the linkage plate 24. At the same time, the movement of the linkage plate 24 can stretch or retract the pull-out pipe 22. Under normal circumstances, the sealing ring 25 between the linkage plate 24 and the fixed plate 27 is tightly attached to achieve a seal. When the sealing ring 25 at the interface leaks due to wear from long-term use, the position of the linkage plate 24 can be adjusted to reduce the distance between it and the fixed plate 27, so that the two sealing rings 25 are more tightly attached to achieve a stronger sealing effect.

[0024] When the sealing ring 25 at the connection point experiences reduced sealing force due to wear or aging from long-term use, it is not necessary to disassemble the entire flange structure. Simply adjust the position of the linkage plate 24 to shorten its distance from the fixed plate 27, and a greater clamping force can be applied to the sealing ring 25 again, quickly restoring or even enhancing the sealing effect. This significantly improves the reliability and service life of the sealing structure and greatly simplifies the maintenance process. When the throttle valve leaks, the unmetered air entering will cause the air-fuel mixture to remain lean. The ECU will record a continuous positive increase in the long-term fuel trim value in an attempt to compensate. At the same time, the idle speed control valve will continuously reduce its opening until it reaches its limit to stabilize the speed. The intake pressure sensor reading will be higher than the normal vacuum value at idle, while the front oxygen sensor signal will remain in the low voltage range for a long time. By comparing the logical relationship of these parameters with the preset threshold, the ECU can generate a fault code indicating an intake system leak in the fault diagnosis system, thereby determining whether the position of the pull-out pipe 22 needs to be adjusted.

[0025] Example 2: The pull-out tube 22 is based on a flexible corrugated tube structure. Its tube wall is not a straight structure, but is formed into a series of continuous annular corrugations or nested sleeves through injection molding or blow molding processes. This gives it foldable and extendable characteristics similar to an accordion or a telescope in the axial direction. When subjected to axial tension, the corrugations are unfolded or the sleeves are pulled out, thereby extending the length. When subjected to axial pressure, the corrugations are compressed or the sleeves are pushed in, thereby shortening the length and stacking. Throughout the process, the folds or nested structure of the tube wall ensures that the tube can still maintain a basic airtight passage when deformed, and the inherent elasticity of the plastic material allows it to be repeatedly deformed without being prone to fatigue fracture.

[0026] The transmission mechanism 3 includes a connecting rod 31 with a threaded section 32 on its surface. Both the linkage plate 24 and the fixing plate 27 are fitted onto the surface of the connecting rod 31. The connecting rod 31 is located within the interfaces on both sides of the front of the fixing plate 27 and the linkage rod. The fixing plate 27 is connected to one end of the connecting rod 31 by a bearing, and the linkage plate 24 is threaded to the threaded section 32 of the connecting rod 31. The end of the connecting rod 31 extends to the back of the air intake cylinder 11. A limiting head 33 is provided at one end of the connecting rod 31, located on the front of the fixing plate 27. A transmission rod 35 is provided at the bottom of the connecting rod 31. A bevel gear 34 is installed at the top of the transmission rod 35 and the end of the connecting rod 31, respectively. The control base 13... A gear set 36 is provided at the bottom. The transmission mechanism 3 is mainly used to control the movement of the linkage plate 24. The openings on the linkage plate 24 and the fixed plate 27 are used for the installation of the connecting rod 31. The connecting rod 31 extends to the back of the air inlet cylinder 11. The connecting surface includes a threaded section 32, which is threadedly connected to the linkage plate 24. The fixed plate 27 is axially connected to the connecting rod 31 and is limited by the limiting head 33. A bevel gear 34 is installed at the end of the connecting rod 31 and at the transmission rod 35 below. The two cooperate with each other. At the same time, a gear set 36 is installed at the end of the transmission rod 35 and the bottom surface of the control base 13. The transmission rod 35 can be rotated by the motor drive, which drives the connecting rod 31 to realize the position adjustment of the linkage plate 24.

[0027] Working principle: Valve body 1 is the motorcycle throttle valve. The motorcycle throttle valve is the core valve controlling the engine's intake air volume. It is installed between the air filter and the engine's intake manifold. By changing the valve opening, it precisely regulates the air flow entering the cylinder, thereby matching the fuel injection quantity under different operating conditions, and ultimately controlling the engine's speed, torque, and power output. The driver operates the throttle lever, which drives the throttle valve flap 12 to rotate via cable or electrical signal, increasing or decreasing the cross-sectional area of ​​the intake passage. After the ECU receives the signal of the amount of air entering, it calculates the intake air volume based on the preset air-fuel ratio. The corresponding fuel injection quantity enables precise control of the air-fuel mixture ratio. At idle, the flap is almost closed, and the idle bypass valve controlled by the ECU provides a small amount of air to maintain operation. During acceleration, the flap opening increases, the intake air volume increases sharply, and the ECU simultaneously increases fuel injection, enabling the engine to output strong power. This achieves precise management of the engine's breathing rhythm. The valve body 1 includes, but is not limited to, the intake cylinder 11; the valve flap and the control base 13. The control base 13 includes mechanical transmission structures such as gears and motors, which are used to control the opening and closing size of the valve flap in the intake cylinder 11 to make it flip.

[0028] Specifically, the valve body 1 is the core mechanical assembly of the motorcycle throttle. Its intake cylinder 11, as the airflow channel, is a precision-cast aluminum alloy part with a smooth inner wall to ensure smooth airflow. The valve flap, as a key actuator, is suspended in the center of the intake cylinder 11 via a rotating shaft. Its circular or elliptical design allows for stepless adjustment of the airflow cross-sectional area during rotation. The control base 13 integrates an electromechanical transmission system. In the traditional cable-operated structure, it includes a cable disc and a return spring. The valve body 1 is an electronic throttle. The control base 13 has a built-in micro gearbox and servo motor. The ECU sends pulse signals to drive the motor gear set 36, converting the electronic control commands into precise angular displacement of the throttle shaft, thereby achieving millisecond-level closed-loop control of the flap opening. The entire valve body 1 works in concert with high-precision bearings, sealing rings, and sensors to convert driving intentions into precise physical openings, ultimately achieving digital and precise management of the engine intake airflow.

[0029] Typically, the valve body 1 and the air inlet are fastened together using flange bolts and a sealing gasket. Corresponding flanges with bolt holes are machined on the end faces of the valve body 1 at the air inlet and the air inlet, respectively. A layer of oil-resistant and heat-resistant rubber or silicone gasket is sandwiched between them. The gasket is tightened using evenly distributed bolts, causing it to deform under pressure and fill all microscopic unevenness, thus forming a reliable airtight connection. However, traditional sealing methods are prone to weakening of the sealing effect and even leakage over time with prolonged use of the gasket. The flange part... Since the valve body is fixed, it needs to be disassembled and replaced when the seal fails, which is quite troublesome. Therefore, the sealing connection structure of the transmission is changed by adding a pull-out tube 22. The pull-out tube 22 is equivalent to the link between the valve body 1 and the motorcycle air intake. The pull-out tube 22 can be pulled out and retracted, thereby changing its length. A sealing ring 25 is installed at both the linkage plate 24 of the pull-out tube 22 and the fixing plate 27 of the air intake pipe 26. The movement of the linkage plate 24 can adjust the degree of compression between it and the sealing ring 25 on the fixing plate 27, thereby adjusting the sealing performance.

[0030] Specifically, one end of the air inlet pipe 26 of the valve body 1 and the end of the pull-out pipe 22 are both fixed with connecting plates 21, which are bolted together. One end of the pull-out pipe 22 is a flat connector 23, which facilitates connection and fixation with the linkage plate 24. At the same time, the movement of the linkage plate 24 can stretch or retract the pull-out pipe 22. Under normal circumstances, the sealing ring 25 between the linkage plate 24 and the fixed plate 27 is tightly attached to achieve a seal. When the sealing ring 25 at the interface is worn due to long-term use and causes air leakage, the position of the linkage plate 24 can be adjusted to reduce the distance between it and the fixed plate 27, so that the two sealing rings 25 are more tightly attached, thereby achieving a stronger sealing effect.

[0031] Specifically, when the sealing ring 25 at the connection point experiences reduced sealing force due to wear or aging from long-term use, it is not necessary to disassemble the entire flange structure. Simply adjusting the position of the linkage plate 24 to shorten its distance from the fixed plate 27 allows for the re-application of greater clamping force to the sealing ring 25, quickly restoring or even enhancing the sealing effect. This significantly improves the reliability and service life of the sealing structure and greatly simplifies the maintenance process. When the throttle valve leaks, the unmetered air entering the system causes the air-fuel mixture to remain continuously lean. The ECU records a continuous positive increase in the long-term fuel trim value in an attempt to compensate. At the same time, the idle speed control valve continuously reduces its opening until it reaches its limit to stabilize the engine speed. The intake pressure sensor reading will be higher than the normal vacuum value at idle, while the front oxygen sensor signal will remain in the low voltage range for a long time. By comparing the logical relationship between these parameters and the preset threshold, the ECU can generate a fault code indicating an intake system leak in the fault diagnosis system, thereby determining whether the position of the pull-out pipe 22 needs to be adjusted.

[0032] The pull-out tube 22 is based on a flexible corrugated tube structure. Its tube wall is not a straight structure, but is formed into a series of continuous annular corrugations or nested sleeves through injection molding or blow molding processes. This gives it foldable and extendable characteristics similar to an accordion or a telescope in the axial direction. When subjected to axial tension, the corrugations are unfolded or the sleeves are pulled out, thereby extending the length. When subjected to axial pressure, the corrugations are compressed or the sleeves are pushed in, thereby shortening the length and stacking. Throughout the process, the folds or nested structure of the tube wall ensures that the tube can still maintain a basic airtight passage when deformed, and the inherent elasticity of the plastic material allows it to be repeatedly deformed without being prone to fatigue fracture.

[0033] The transmission mechanism 3 is mainly used to control the movement of the linkage plate 24. The openings on the linkage plate 24 and the fixed plate 27 are used for the installation of the connecting rod 31. The connecting rod 31 extends to the back of the air inlet cylinder 11. The connecting surface includes a threaded section 32, which is threadedly connected to the linkage plate 24. The fixed plate 27 is axially connected to the connecting rod 31 and is limited by the limiting head 33. The end of the connecting rod 31 and the transmission rod 35 below it are both equipped with bevel gears 34, which cooperate with each other. At the same time, the end of the transmission rod 35 and the bottom surface of the control base 13 are both equipped with gear sets 36. The transmission rod 35 can be rotated by the motor drive, which will drive the connecting rod 31 to realize the position adjustment of the linkage plate 24.

[0034] During initial installation, first secure the connecting plates 21 at both ends of the pull-out tube 22 to the air inlet pipe 26 of the valve body 1 and the air inlet flange of the motorcycle, respectively. Then, rotate the transmission rod 35 manually or by motor, which drives the bevel gear 34 set to rotate the connecting rod 31. Since the connecting rod 31 is threadedly connected to the linkage plate 24 and the fixing plate 27 is only axially limited, the rotation of the connecting rod 31 will be converted into the linear motion of the linkage plate 24 along the axial direction, thereby stretching or compressing the pull-out tube 22 to a suitable length, and adjusting the distance between the linkage plate 24 and the fixing plate 27 to tighten the sealing ring 25. The initial seal is formed by close contact. The positions of the fixing plate 27 and the intake pipe 26 are fixed and fixedly installed inside the motorcycle. When the sealing ring 25 wears down after long-term use, causing the ECU to detect a leakage fault code such as an abnormally increased long-term fuel trim value, there is no need to disassemble the assembly. Simply restart the transmission mechanism 3 and slightly screw the connecting rod 31 in to drive the linkage plate 24 closer to the fixing plate 27. This applies a greater compensating clamping force to the worn sealing ring 25, which can dynamically restore the sealing effect. The whole process achieves adaptive adjustment of sealing performance without disassembly and maintenance.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motorcycle throttle body sealing structure, characterized in that: Includes a valve body (1), which includes an air intake cylinder (11), a throttle flap (12) and a control base (13). A sealing joint (2) is provided at the air intake position of the valve body (1), and a transmission mechanism (3) is provided on the valve body (1). The sealing joint (2) includes a pull tube (22) and a linkage plate (24), and a fixing plate (27) and an air inlet pipe (26) are provided near the linkage plate (24). The transmission mechanism (3) includes a connecting rod (31), the surface of which is provided with a threaded section (32), and the linkage plate (24) and the fixing plate (27) are both sleeved on the surface of the connecting rod (31).

2. The motorcycle throttle body sealing structure according to claim 1, characterized in that: The throttle flap (12) is located inside the air chamber of the air intake cylinder (11), and the throttle flap (12) is movably connected to the inside of the air intake cylinder (11).

3. The motorcycle throttle body sealing structure according to claim 1, characterized in that: The air intake cylinder (11) is located on the top surface of the control base (13), and the gear structure inside the control base (13) is linked with the throttle flap (12).

4. The motorcycle throttle body sealing structure according to claim 1, characterized in that: The air outlet portion of the pull tube (22) and the air inlet portion of the air inlet cylinder (11) are both fixed with connecting plates (21), and the two connecting plates (21) are fixed together by bolts.

5. The motorcycle throttle body sealing structure according to claim 1, characterized in that: The pull tube (22) is a stretchable and retractable corrugated tube. One end of the pull tube (22) is connected and fixed with a flat end connector (23), and the linkage plate (24) is fixed with the flat end connector (23).

6. The motorcycle throttle body sealing structure according to claim 1, characterized in that: The fixing plate (27) and the pull tube (22) are each fixed with a sealing ring (25), and the two sealing rings (25) are tightly attached to each other.

7. The motorcycle throttle body sealing structure according to claim 1, characterized in that: The flat connector (23) is horizontally aligned with the air intake pipe (26), and the two are connected to each other.

8. The motorcycle throttle body sealing structure according to claim 1, characterized in that: The connecting rods (31) are all located in the interfaces on both sides of the front of the fixed plate (27) and the linkage rod, and the fixed plate (27) is connected to the connecting rod (31) with a bearing at one end, and the linkage plate (24) is threaded to the threaded section (32) of the connecting rod (31).

9. A motorcycle throttle body sealing structure according to claim 1, characterized in that: The end of the connecting rod (31) extends to the back of the air inlet cylinder (11), and a limiting head (33) is provided at one end of the connecting rod (31), and the limiting head (33) is located at the front of the fixing plate (27).

10. A motorcycle throttle body sealing structure according to claim 9, characterized in that: The bottom of the connecting rod (31) is provided with a transmission rod (35), and the top of the transmission rod (35) and the end of the connecting rod (31) are respectively equipped with bevel gears (34). The bottom of the control base (13) is provided with a gear set (36).

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