Leak-proof throttle valve body

Abstract

The utility model relates to a leakproof throttle body which comprises a shell, a control shaft, a throttle plate and a driving mechanism, the length direction of the control shaft extends up and down, the throttle plate is fixedly installed on the control shaft, the driving mechanism is linked with the control shaft, and the control shaft, the throttle plate and the driving mechanism are all located in the shell. The driving mechanism comprises a throttle valve gear located on the left side of the control shaft, the throttle valve gear is fixedly connected with the control shaft, the control shaft is fixedly provided with a positioning section, the positioning section is sleeved with the return spring in the circumferential direction, one end of the return spring abuts against the throttle valve gear, and the other end of the return spring abuts against the shell. The ball bearing and the clamping ring are both located on the right side of the control shaft, the clamping ring is located on the right side of the ball bearing, and by the adoption of the scheme, the axial movement amount of the throttle valve piece can be controlled through the combined action of the ball bearing and the clamping ring while the control shaft rotates along with the throttle valve gear; therefore, the sealing performance of the throttle body is improved.

Description

Technical Field

[0001] The utility model relates to a leakage-proof throttle body. Background Art

[0002] The throttle is a controllable valve that controls the air entering the engine. After the gas enters the intake pipe, it mixes with gasoline to become a combustible mixture, which is then burned to produce work. It is connected to the air filter at the top and the engine block at the bottom, and is called the throat of the car engine.

[0003] Among them, the throttle valve usually includes a shell, a control shaft, a throttle plate and a driving mechanism. An air duct is arranged in the shell, and the control shaft is rotatably installed in the shell. The driving mechanism is used to drive the control shaft to rotate. In addition, the control shaft is provided with a mounting section extending into the air duct. The throttle plate is fixedly installed on the mounting section by means of bolts, and the intake volume is adjusted as the control shaft rotates. Therefore, when the user steps on the accelerator pedal, the accelerator pedal position sensor on the accelerator pedal sends a signal to the engine control unit, and the engine control unit sends a PWM signal to the motor to realize the motor linkage drive mechanism to realize the rotation of the control shaft and the throttle plate on the control shaft, thereby controlling the amount of air flowing toward the engine.

[0004] Because the sealing of the throttle valve will gradually decrease after long-term use or multiple opening and closing cycles, thereby increasing the possibility of leakage, the existing throttle valve assembly will fix a return spring on the sleeve to facilitate the resetting of the throttle body and reduce the possibility of leakage. After completion, the sleeve is installed in the drive mechanism to make the resetting of the control shaft smoother. However, during the assembly process of the throttle valve, the return spring needs to be fixed on the sleeve, which significantly increases the difficulty of assembling the throttle valve in the assembly steps. Therefore, how to achieve leakage prevention of the throttle body while optimizing the assembly has become a problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a leakage-proof throttle body which can control the axial movement of the throttle plate through the combined action of a ball bearing and a retaining ring while the control shaft rotates with the throttle gear, thereby improving the sealing performance of the throttle body.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a shell, a control shaft, a throttle plate, a motor and a driving mechanism, the length direction of the control shaft extends left and right and the throttle plate is fixedly installed on the control shaft, the driving mechanism is linked with the control shaft, the motor is linked with the driving mechanism, the control shaft, the throttle plate and the driving mechanism are all located in the shell, and also include a return spring, a ball bearing and a retaining ring, the driving mechanism includes a throttle gear located on the left side of the control shaft, the throttle gear is fixedly connected to the control shaft, the control shaft is located on the right side of the throttle gear and is fixedly installed with a positioning section, the return spring is sleeved on the circumference of the positioning section and one end is against the throttle gear, and the other end is against the shell, the ball bearing and the retaining ring are both located on the right side of the control shaft, and the retaining ring is located on the right side of the ball bearing.

[0007] The utility model is further configured as follows: the return spring includes an upper support leg and a lower support leg, the throttle gear includes an upper limit segment and a lower limit segment protruding to the right, the upper support leg includes a first fixed segment, a connecting segment and a second fixed segment, the first fixed segment is located below the upper limit segment and extends in the front-to-back direction in length, the upper limit segment is located on the right side of the first fixed segment and is provided with an upper limit protrusion that abuts against the first fixed segment, the second fixed segment is located on the right side of the first fixed segment and extends in the front-to-back direction in length, and the connecting segment is located between the first fixed segment and the second fixed segment and extends in the left-to-right direction in length.

[0008] The utility model is further configured as follows: a placement groove is provided on the lower limit section, a limit protrusion is provided on the right side of the placement groove, the lower support leg is located in the placement groove and abuts against the limit protrusion, and an installation groove for inserting the lower support leg is provided on the shell.

[0009] The utility model is further configured as follows: it also includes an oil injection assembly, the shell includes a base and a cover body, the cover body is located above the base and fixedly connected to the base, the oil injection assembly includes a sleeve, oil absorbing cotton, and an extrusion piece, the extrusion piece includes a resistance section and a threaded section from left to right, the length direction of the sleeve extends left and right and is fixedly connected to the cover body, an accommodating chamber is provided in the sleeve, an oil injection channel is provided on the right side of the accommodating chamber, the oil absorbing cotton is located in the accommodating chamber, an extrusion channel is provided in the oil absorbing cotton, the extrusion channel and the oil injection channel are connected to each other, the threaded section is threadedly matched with the sleeve, and the resistance section is against the sleeve.

[0010] The utility model is further configured as follows: the abutment section is configured as a polygonal prism.

[0011] The utility model is further configured as follows: the oil injection assembly also includes a guide member and a return spring located in the extrusion channel, the guide member includes a head and a sliding section, the shape and size of the sliding section are adapted to the extrusion channel, the diameter of the head is larger than the diameter of the oil injection channel, one end of the return spring is fixedly connected to the head, and the other end is fixedly connected to the oil absorbent cotton.

[0012] The utility model is further configured as follows: it also includes a plurality of connecting bolts, the sleeve includes a fixing ring located above the cover body, the fixing ring is provided with a plurality of through holes, the through holes are arranged at intervals along the circumference of the fixing ring, the cover body is provided with screw holes below each through hole, each connecting bolt is inserted into a corresponding through hole and cooperates with the screw hole thread.

[0013] By adopting the above technical solution, 1. the control shaft can not only accurately control the axial movement of the throttle plate through the joint action of the ball bearing and the retaining ring while rotating with the throttle gear, thereby simplifying the overall structure, accelerating the assembly speed and improving reliability, but also enhance the sealing performance of the throttle body, and reduce the risk of gas or liquid leakage caused by inaccurate throttle plate position; 2. The design in which one end of the return spring is against the throttle gear and the other end is against the housing makes it possible to quickly drive the control shaft and the throttle plate to reset after the motor stops working. Due to the elastic effect of the return spring, when the motor is turned off, it can ensure that the throttle plate returns to its initial position quickly and smoothly, which not only improves the response speed, but also further ensures the sealing when the throttle is closed, effectively preventing the occurrence of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;

[0016] Figure 2 It is an exploded view of a specific implementation method of the utility model;

[0017] Figure 3 It is an assembly diagram of the throttle plate, control shaft, drive mechanism and motor in the utility model;

[0018] Figure 4 It is a cross-sectional view of the utility model from top to bottom;

[0019] Figure 5It is a cross-sectional view of the utility model from left to right;

[0020] Figure 6 for Figure 2 A magnified view of middle;

[0021] Figure 7 Figure 2 Enlarged view of middle B;

[0022] Figure 8 for Figure 4 Enlarged view of middle C;

[0023] Fig. 9 It is an enlarged view of D in Figure 5;

[0024] Fig.10 for Figure 3 Enlarged view of E.

[0025] In the figure: 1-housing, 11-mounting groove, 12-base, 13-cover, 2-control shaft, 21-positioning section, 3-throttle plate, 4-motor, 5-driving mechanism, 51-throttle gear, 511-upper limit section, 5111-upper limit bump, 512-lower limit section, 5121-placement groove, 5122-lower limit bump, 52-driving gear, 53-transmission gear, 54-transmission shaft, 541-matching gear, 6-return spring, 61-upper support foot , 611-first fixed section, 612-connecting section, 613-second fixed section, 62-lower support foot, 7-ball bearing, 8-clamping ring, 9-oil filling assembly, 91-sleeve, 911-accommodating chamber, 912-oil filling channel, 913-fixing ring, 9131-perforation, 92-oil absorbing cotton, 921-extrusion channel, 93-extrusion piece, 931-contact section, 932-threaded section, 94-guide piece, 941-head, 942-sliding section, 95-reset spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1-Figure 10As shown, the utility model discloses a leakage-proof throttle body, including a housing 1, a control shaft 2, a throttle plate 3, a motor 4 and a driving mechanism 5. The length direction of the control shaft 2 extends left and right and the throttle plate 3 is fixedly installed on the control shaft 2 by bolts. The driving mechanism 5 is linked with the control shaft 2, and the motor 4 is linked with the driving mechanism 5. The control shaft 2, the throttle plate 3 and the driving mechanism 5 are all located in the housing 1, and also include a return spring 6, a ball bearing 7 and a clamping ring 8. The driving mechanism 5 includes a throttle gear 51, a driving gear 52, a transmission gear 53 and a transmission shaft 54 ​​located on the left side of the control shaft 2. The transmission gear 53 is fixedly installed on the transmission shaft 54. The transmission shaft 54 ​​is located A matching gear 541 is fixedly installed below the transmission gear 53. The transmission shaft 54 ​​is rotatably installed on the housing 1. The driving gear 52 is fixedly connected to the output shaft of the motor 4. The driving gear 52 and the transmission gear 53 are meshed with each other. The matching gear 541 is meshed with the throttle gear 51. The throttle gear 51 is fixedly connected to the control shaft 2. The control shaft 2 is located on the right side of the throttle gear 51 and is fixedly installed with a positioning section 21 through integral molding or other methods. The return spring 6 is sleeved on the circumference of the positioning section 21 and one end is against the throttle gear 51, and the other end is against the housing 1. The ball bearing 7 and the retaining ring 8 are both located on the right side of the control shaft 2, and the retaining ring 8 is located on the right side of the ball bearing 7. 1. 1. When the control shaft 2 rotates with the throttle gear 51, the ball bearing 7 and the retaining ring 8 work together to not only accurately control the axial movement of the throttle plate 3, thereby simplifying the overall structure, accelerating the assembly speed and improving the reliability, but also enhancing the sealing performance of the throttle body, reducing the risk of gas or liquid leakage caused by the inaccurate position of the throttle plate 3; 2. Since one end of the return spring 6 is against the throttle gear 51 and the other end is against the housing 1, the control shaft 2 and the throttle plate 3 can be quickly driven to reset after the motor 4 stops working. Due to the elastic effect of the return spring 6, when the motor 4 is turned off, it can ensure that the throttle plate 3 returns to the initial position quickly and smoothly. This not only improves the response speed, but also further ensures the sealing when the throttle is closed, effectively preventing the occurrence of leakage.

[0028] The return spring 6 includes an upper support leg 61 and a lower support leg 62, the throttle gear 51 includes an upper limit segment 511 and a lower limit segment 512 protruding to the right, the upper support leg 61 includes a first fixed segment 611, a connecting segment 612 and a second fixed segment 613, the first fixed segment 611 is located below the upper limit segment 511 and extends in the front-to-back direction, the upper limit segment 511 is located on the right side of the first fixed segment 611 and is provided with an upper limit projection 5111 abutting against the first fixed segment 611, the second fixed segment 613 is located on the right side of the first fixed segment 611 and extends in the front-to-back direction, the connecting segment 612 is located between the first fixed segment 611 and the second fixed segment 613 and extends in the left-to-right direction, 1. Since the first fixed section 611 is located below the upper limit section 511, and the second fixed section 613 is located on the right side of the first fixed section 611, the arrangement of the first fixed section 611, the connecting section 612 and the second fixed section 613 can prevent the upper support leg 61 from moving to the right or forward, causing the throttle to rotate inflexibly or jam, and the return spring 6 is not prone to misalignment, making the internal structure of the throttle more compact; 2. Since the elastic reset of the return spring 6 is synchronized with the rotation of the control shaft 2 and the throttle gear 51, the return rotation amplitude of the throttle plate 3 and the control shaft 2 can be indirectly limited by limiting the upper support leg 61 and the lower support leg 62, effectively preventing the throttle gear 51 from excessively rotating due to the elastic return of the return spring 6, causing the throttle plate 3 to be unable to be accurately opened or closed.

[0029] Preferably, the lower limit section 512 is provided with a placement groove 5121, the lower limit section 512 is provided with a lower limit protrusion 5122 on the right side of the placement groove 5121, the lower support leg 62 is located in the placement groove 5121 and abuts against the lower limit protrusion 5122, and the housing 1 is provided with a mounting groove 11 for the lower support leg 62 to be inserted, and the lower limit protrusion 5122 located on the right side of the placement groove 5121 can abut against the lower support leg 62, so the lower limit protrusion 512 2 can cooperate with the upper limit projection 5111 to improve the stability of the upper support leg 61 and the lower support leg 62 in the throttle valve. Moreover, because the lower support leg 62 is inserted into the mounting groove 11 of the housing 1, when the motor 4 drives the driving mechanism 5 to drive the throttle gear 51 and the driving shaft to rotate, the return spring 6 can be stably located in the circumferential direction of the control shaft 2 with one end abutting against the throttle gear 51 and the other end abutting against the housing 1, thereby further limiting the position of the return spring 6.

[0030] In addition, it also includes an oil injection component 9. The housing 1 includes a base 12 and a cover 13. The cover 13 is located above the base 12 and is fixedly connected to the base 12 by bolts or the like. The oil injection component 9 includes a sleeve 91, oil-absorbing cotton 92, and an extrusion 93. The extrusion 93 includes a resistance section 931 and a threaded section 932 from left to right. The length direction of the sleeve 91 extends left and right and is fixedly connected to the cover 13. An accommodating chamber 911 is provided in the sleeve 91. The sleeve 91 is located on the right side of the accommodating chamber 911 and is provided with an oil injection channel 912. The oil-absorbing cotton 92 is provided on the right side of the accommodating chamber 911. The cotton 92 is located in the accommodating cavity 911, and an extrusion channel 921 is provided in the oil-absorbing cotton 92. The extrusion channel 921 is communicated with the oil injection channel 912, and the threaded section 932 is threadedly matched with the sleeve 91, and the abutment section 931 abuts against the sleeve 91. 1. Since the driving mechanism 5 includes a plurality of gears, there is a need to lubricate the driving mechanism 5 during operation. Since the cover body 13 is bolted to the base 12, the oil injection of the driving mechanism 5 usually requires the cover body 13 to be removed from the housing 1, and then the lubricating oil is injected into the surface of the driving mechanism 5. 1. The surface of the drive mechanism is lubricated, but when it is not possible to directly obtain a tool such as a screwdriver for removing the bolt, the extrusion piece 93 can be separated from the sleeve 91 by rotating the extrusion piece 93, so that the lubricating oil flows into the surface of the drive mechanism through the oil injection channel 912. At this time, the extrusion piece 93 is installed on the sleeve 91 to prevent external dust from flowing to the surface of the drive mechanism through the oil injection channel 912; 2. Since the oil-absorbing cotton 92 is located in the accommodating cavity 911, as the volume of the extrusion piece 93 entering the sleeve 91 continues to increase, when the bottom of the extrusion piece 93 contacts the upper end surface of the oil-absorbing cotton 92 to The rear threaded section 932 can enter into the extrusion channel 921. At this time, the threaded section 932 continues to be rotated so that it can continue to cooperate with the thread of the sleeve 91. At the same time, the oil-absorbing cotton 92 located between the threaded section 932 and the sleeve 91 can be squeezed in the process of the threaded section 932 continuously cooperating with the sleeve 91 downward. Therefore, when it is necessary to oil the driving mechanism 5 but the lubricating oil cannot be obtained immediately, by rotating the threaded section 932 downward to squeeze the oil-absorbing cotton 92, the threaded section 932 can squeeze the lubricating oil stored in the oil-absorbing cotton 92 and make it flow to the surface of the driving mechanism.

[0031] Preferably, the interference segment 931 is arranged in a hexagonal prism. Since the interference segment 931 is a polygonal prism, during the process of rotating the threaded segment 932 to gradually cooperate with the sleeve 91, the user contacts the interference segment 931 of the extrusion member 93, and the interference segment 931 is a polygonal prism, which can effectively increase the circumferential friction of the interference segment 931 and provide convenience for the user to rotate the interference segment 931 to realize the extrusion member 93 entering the sleeve 91 and squeezing the oil-absorbing cotton 92.

[0032] Preferably, the oil injection assembly 9 also includes a guide member 94 and a return spring 95 located in the extrusion channel 921, the guide member 94 includes a head 941 and a sliding section 942, the shape and size of the sliding section 942 are adapted to the extrusion channel 921, the diameter of the head 941 is larger than the diameter of the oil injection channel 912, one end of the return spring 95 is fixedly connected to the head 941 by welding or the like, and the other end is fixedly connected to the oil-absorbing cotton 92 by welding or the like. 1. When the threaded section 932 is downwardly connected to the sleeve 91 and the oil-absorbing cotton 92 is squeezed in the downward process, the return spring 95 can be squeezed as the threaded section 932 is downwardly moved, and the lubricating oil in the oil-absorbing cotton 92 is squeezed. After the oil reaches the surface of the driving mechanism, the threaded section 932 is rotated counterclockwise to move the extrusion member 93 to the left. At this time, the reset spring 95 that has lost the extrusion can be reset and drive the shape of the oil-absorbing cotton 92 to reset to the left; 2. Since the shape and size of the sliding section 942 are adapted to the extrusion channel 921 and the diameter of the head 941 is larger than the diameter of the oil injection channel 912, as the threaded section 932 of the extrusion member 93 is connected downward with the sleeve 91, the threaded section 932 can push the head 941 and the sliding section 942 to move downward. Since the head 941 cannot move downward over the oil injection channel 912, the existence of the head 941 can limit the downward movement path of the guide member 94 and guide the downward movement of the guide member 94.

[0033] It also includes a number of connecting bolts (not shown in the figure), the sleeve 91 includes a fixing ring 913 located above the cover body 13, the fixing ring 913 is provided with a number of through holes 9131, each through hole 9131 is arranged at intervals along the circumference of the fixing ring 913, the cover body 13 is provided with screw holes (the viewing angle is not shown in the figure) below each through hole 9131, each connecting bolt is inserted into a corresponding through hole 9131 and cooperates with the screw thread. Since the sleeve 91 and the cover body 13 can be separated by removing the bolts between the through holes 9131 on the fixing ring 913 and the screw holes on the cover body 13, when it is necessary to clean the inside of the sleeve 91 and replace the new oil-absorbing cotton 92, the sleeve 91 that can be removed from the cover body 13 can facilitate the subsequent cleaning and replacement of the oil-absorbing cotton.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leak-proof throttle body, comprising a housing, a control shaft, a throttle plate, a motor and a driving mechanism, wherein the length direction of the control shaft extends left and right and the throttle plate is fixedly mounted on the control shaft, the driving mechanism is linked with the control shaft, the motor is linked with the driving mechanism, the control shaft, the throttle plate and the driving mechanism are all located in the housing, and characterized in that: It also includes a return spring, a ball bearing and a retaining ring. The driving mechanism includes a throttle gear located on the left side of the control shaft. The throttle gear is fixedly connected to the control shaft. The control shaft is fixedly installed with a positioning section on the right side of the throttle gear. The return spring is sleeved on the circumference of the positioning section and one end is against the throttle gear, and the other end is against the housing. The ball bearing and the retaining ring are both located on the right side of the control shaft, and the retaining ring is located on the right side of the ball bearing.

2. The anti-leakage throttle body according to claim 1, characterized in that: The return spring includes an upper support leg and a lower support leg, the throttle gear includes an upper limit segment and a lower limit segment protruding to the right, the upper support leg includes a first fixed segment, a connecting segment and a second fixed segment, the first fixed segment is located below the upper limit segment and extends in the front-to-back direction, the upper limit segment is located on the right side of the first fixed segment and is provided with an upper limit protrusion that abuts against the first fixed segment, the second fixed segment is located on the right side of the first fixed segment and extends in the front-to-back direction, and the connecting segment is located between the first fixed segment and the second fixed segment and extends in the left-to-right direction.

3. The anti-leakage throttle body according to claim 2, characterized in that: The lower limit section is provided with a placement groove, the lower limit section is provided with a limit protrusion on the right side of the placement groove, the lower support leg is located in the placement groove and abuts against the limit protrusion, and the shell is provided with a mounting groove for inserting the lower support leg.

4. The anti-leakage throttle body according to claim 1, characterized in that: It also includes an oil injection assembly, the shell includes a base and a cover body, the cover body is located above the base and fixedly connected to the base, the oil injection assembly includes a sleeve, oil absorbing cotton, and an extrusion piece, the extrusion piece includes a resistance section and a threaded section from left to right, the length direction of the sleeve extends left and right and is fixedly connected to the cover body, an accommodating cavity is provided in the sleeve, an oil injection channel is provided on the right side of the accommodating cavity, the oil absorbing cotton is located in the accommodating cavity, an extrusion channel is provided in the oil absorbing cotton, the extrusion channel and the oil injection channel are connected to each other, the threaded section is threadedly matched with the sleeve, and the resistance section is against the sleeve.

5. The anti-leakage throttle body according to claim 4, characterized in that: The interference section is arranged in the form of a polygonal prism.

6. A leakage-proof throttle body according to claim 4 or 5, characterized in that: The oil injection assembly also includes a guide member and a return spring located in the extrusion channel, the guide member includes a head and a sliding section, the shape and size of the sliding section are adapted to the extrusion channel, the diameter of the head is larger than the diameter of the oil injection channel, one end of the return spring is fixedly connected to the head, and the other end is fixedly connected to the oil absorbent cotton.

7. The anti-leakage throttle body according to claim 4, characterized in that: It also includes a plurality of connecting bolts. The sleeve includes a fixing ring located above the cover body. The fixing ring is provided with a plurality of through holes. The through holes are arranged at intervals along the circumference of the fixing ring. The cover body is provided with screw holes below each through hole. Each connecting bolt is inserted into a corresponding through hole and cooperates with the screw hole thread.

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