Method for manufacturing throttle device, and angular adjustment jig

Abstract

To prevent an error of a flow path opening from occurring in a throttle device.SOLUTION: A method for manufacturing a throttle device comprises: a default angle setting process in which a valve gear 6 and a default lever 7 are rotated together to adjust a position at which the default lever 7 is restricted from rotating in a valve closing direction; and a valve closing angle setting process in which, with the rotation of the default lever 7 in the valve closing direction restricted at the default angle, an external force is applied from outside a throttle device to rotate the valve gear 6 in the valve closing direction, and a position at which the valve gear 6 is restricted from rotating in the valve closing direction is adjusted.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a throttle device and a jig for angle adjustment.

Background Art

[0002] For example, Patent Document 1 discloses an electronically controlled throttle control device. The electronically controlled throttle control device disclosed in Patent Document 1 has a throttle valve attached to a throttle shaft. The throttle valve rotates by transmitting rotational power through the throttle shaft and controls the amount of air.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A throttle device such as the electronically controlled throttle control device disclosed in Patent Document 1 is configured such that even when the transmission of power from a motor or the like to the throttle valve is interrupted for some reason, the throttle valve is held in a state where it slightly opens the flow path. Specifically, the throttle device includes a default lever and a valve gear connected via a default spring. The valve gear is fixed to the throttle shaft. These default lever and valve gear are biased in the valve closing direction by a return spring. On the other hand, the default lever is restricted from rotating by contacting a stopper when the throttle valve reaches an angle (default angle) at which it slightly opens the flow path. As a result, the rotation of the default lever and the valve gear in the valve closing direction stops, and the throttle valve is held at the default opening degree. To set the throttle valve to the valve closing angle, the motor further rotates the slot valve against the biasing force of the default spring.

[0005] When manufacturing such a throttle device, first, the valve closing angle is set. Specifically, with the valve gear biased in the valve closing direction by the return spring, the throttle valve is set to the valve closing angle, and in this state, the position of the stop screw (a stopper that restricts the rotation of the valve gear) is adjusted so that the movement of the valve gear in the valve closing direction is restricted. Then, the default angle is set. Specifically, the valve gear and the default lever are adjusted so that the throttle valve is at the default angle, and in this state, the position of the default screw (a stopper that restricts the rotation of the default lever) is adjusted so that the movement of the default lever in the valve closing direction is restricted. However, in such a manufacturing method, when setting the valve closing angle, no torque of the motor is applied to the valve gear. Therefore, when the throttle device is mounted on a vehicle, the rotation angle of the throttle valve in a state where the angle is adjusted by the motor to be the valve closing angle may not match the rotation angle set during manufacturing due to backlash or the like, and an error may occur in the opening degree of the flow path.

[0006] The present invention has been made in view of the above-described problems, and an object thereof is to suppress the occurrence of an error in the flow path opening degree in a throttle device.

Means for Solving the Problems

[0007] As means for solving the above problems, the present invention adopts the following configuration.

[0008] A first invention is a method for manufacturing a throttle device, wherein the throttle device is rotatable in a valve closing direction and a valve opening direction, and a throttle valve that adjusts the opening degree of a throttle bore according to a rotation angle, a throttle shaft to which the throttle valve is attached, a valve gear fixed to the throttle shaft, a default lever that is rotatably connected to the valve gear and whose rotation in the valve closing direction is restricted by a default angle, a return spring that biases the valve gear and the default lever in the valve closing direction, and a default spring that rotatably connects the valve gear and the default lever, and the default angle setting step of integrally rotating the valve gear and the default lever to adjust a position that restricts the rotation of the default lever in the valve closing direction, and a valve closing angle setting step of applying an external force from the outside of the throttle device to rotate the valve gear in the valve closing direction in a state where the rotation of the default lever in the valve closing direction is restricted at the default angle and adjusting a position that restricts the rotation of the valve gear in the valve closing direction.

[0009] The second invention is an angle adjustment jig, comprising a throttle valve that is rotatable in a valve closing direction and a valve opening direction and adjusts the opening degree of a throttle bore according to the rotation angle, a throttle shaft to which the throttle valve is attached, a valve gear fixed to the throttle shaft, a default lever that is rotatably connected to the valve gear and whose rotation in the valve closing direction is restricted by a default angle, a return spring that biases the valve gear and the default lever in the valve closing direction, and a default spring that rotatably connects the valve gear and the default lever, and adopting a configuration in which an external force is applied from outside the throttle device to rotate the valve gear in the valve closing direction.

Advantages of the Invention

[0010] According to the present invention, after the default angle is set, the closing valve angle can be set with an external force applied to the valve gear from outside the throttle device in addition to the biasing force of the return spring. Therefore, the present invention can set the opening valve angle in a state closer to actual vehicle mounting as compared with the case where the closing valve angle is set with only the biasing force of the return spring acting on the valve gear. Thus, according to the present invention, it is possible to suppress the occurrence of an error in the flow path opening degree in the throttle device.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0012] Hereinafter, with reference to the drawings, an embodiment of a manufacturing method of a throttle device and a jig for angle adjustment according to the present invention will be described.

[0013] (First Embodiment) FIG. 1 is a cross-sectional view showing a schematic configuration of a throttle device 1 manufactured by the manufacturing method of the throttle device of the present embodiment. Further, FIG. 2 is a side view showing a schematic configuration of the throttle device 1 manufactured by the manufacturing method of the throttle device of the present embodiment. Further, FIG. 3 is an enlarged view of a main part of FIG. 1. The throttle device 1 is mounted on a vehicle in which an internal combustion engine is installed and adjusts the amount of air supplied to the internal combustion engine.

[0014] As shown in FIGS. 1 to 3, the throttle device 1 includes a throttle body 2, a throttle valve 3, a throttle shaft 4, a main bearing 5, a valve gear 6, a default lever 7, a default spring 8, a return spring 9, a stop screw 10, a default screw 11, a counter gear 12, a counter gear shaft 13, a pinion gear 14, and a motor 15.

[0015] The throttle body 2 is a housing with a throttle bore 2a provided inside. The throttle bore 2a is a flow path through which the air supplied to the internal combustion engine passes, and is formed in a circular shape when viewed from a direction along the flow direction. Such a throttle body 2 encloses and directly or indirectly supports a throttle valve 3, a throttle shaft 4, a main bearing 5, a valve gear 6, a default lever 7, a default spring 8, a return spring 9, a stop screw 10, a default screw 11, a counter gear 12, a counter gear shaft 13, a pinion gear 14, and a motor 15.

[0016] The throttle valve 3 is a plate-like valve body rotatably supported inside the throttle bore 2a, and adjusts the opening degree of the throttle bore 2a. As shown in FIG. 1, the throttle valve 3 is formed in a circular shape that can be accommodated in the throttle bore 2a. This throttle valve 3 is fixed to the throttle shaft 4, and is rotated around the throttle shaft 4 as the throttle shaft 4 rotates.

[0017] The throttle valve 3 closes the throttle bore 2a when the front and back surfaces are orthogonal to the air flow direction in the throttle bore 2a. The angle (rotation angle) of the throttle valve 3 in the circumferential direction around the throttle shaft 4 at this time is called the closing valve angle. That is, the throttle valve 3 closes the throttle bore 2a when it is at the closing valve angle.

[0018] Also, the throttle valve 3 maximizes the opening degree of the throttle bore 2a when the front and back surfaces are parallel to the air flow direction in the throttle bore 2a. The rotation angle of the throttle valve 3 in the circumferential direction around the throttle shaft 4 at this time is called the fully open angle. That is, the throttle valve 3 sets the throttle bore 2a to the maximum opening degree when it is at the fully open angle.

[0019] Also, when the power of the motor 15 is not transmitted to the throttle shaft 4 for any reason, the throttle valve 3 is held at a rotation angle that slightly opens the throttle bore 2a. The rotation angle of the throttle valve 3 in the circumferential direction centered on the throttle shaft 4 at this time is referred to as the default angle. That is, when the throttle valve 3 is at the default angle, it slightly opens the throttle bore 2a.

[0020] Note that, among the circumferential directions centered on the throttle shaft 4, the direction from the fully open angle to the fully closed angle is referred to as the valve closing direction. Also, among the circumferential directions centered on the throttle shaft 4, the direction from the fully closed angle to the fully open angle is referred to as the valve opening direction. The throttle valve 3 is rotatable in the valve closing direction and the valve opening direction, and the rotation angle, and the default angle is set to an angle rotated, for example, about 10° from the fully closed angle to the fully open direction.

[0021] The throttle shaft 4 is pivotally supported inside the throttle body 2 via a main bearing 5 or the like. As shown in FIG. 1, the throttle shaft 4 is disposed so as to straddle the throttle bore 2a.

[0022] One end 4a of the throttle shaft 4 is exposed at an opening provided in the throttle body 2. This one end 4a of the throttle shaft 4 can be connected to an encoder 30 described later. Also, a valve gear 6 is fixed to the other end 4b of the throttle shaft 4. The throttle valve 3 is attached to an intermediate portion between the one end 4a and the other end 4b of the throttle shaft 4.

[0023] The main bearing 5 is a bearing that rotatably holds the throttle shaft 4. For example, the main bearing 5 is a ball bearing or a roller bearing in which rolling elements are sandwiched between an outer ring and an inner ring. In such a main bearing 5, the outer ring is fixed to the throttle body 2 and the inner ring is fixed to the throttle shaft 4.

[0024] The valve gear 6 is a gear fixed to the other end 4b of the throttle shaft 4. As shown in FIG. 2, the valve gear 6 has a disk-shaped main body 6a and a gear portion 6b provided on the outer edge of the main body 6a. The main body 6a is the part fixed to the throttle shaft 4. The gear portion 6b has a plurality of teeth 6b1 arranged at equal intervals and meshes with the counter gear 12.

[0025] In addition, the main body 6a of the valve gear 6 is provided with a plurality of mounting holes 6a1 into which the protruding portions 22a of the angle adjustment jig 20 described later can be inserted. These mounting holes 6a1 are arranged in the circumferential direction centered on the throttle shaft 4. In the present embodiment, four mounting holes 6a1 are provided, but the number of the mounting holes 6a1 can be changed.

[0026] As shown in FIG. 2, the valve gear 6 has a protruding portion 6c that protrudes radially outward from the throttle shaft 4. The protruding portion 6c is the part that abuts against the stop screw 10. The protruding portion 6c abuts against the stop screw 10 in the closing valve direction when the throttle valve 3 is at the closing valve opening degree. When the protruding portion 6c abuts against the stop screw 10, the rotation of the valve gear 6 in the closing valve direction is restricted. That is, the rotation of the valve gear 6 in the closing valve direction is restricted at the closing valve opening degree.

[0027] The default lever 7 is connected to the valve gear 6 via the default spring 8 and is supported so as to be rotatable in the circumferential direction centered on the throttle shaft 4 together with the valve gear 6. The default lever 7 is rotatable with respect to the valve gear 6 by elastically deforming the default spring 8. That is, the default lever 7 is rotatably connected to the valve gear 6.

[0028] Also, as shown in FIG. 2, the default lever 7 has a protrusion 7a that protrudes radially outward around the throttle shaft 4. The protrusion 7a is a part that abuts against the default screw 11. The protrusion 7a abuts against the default screw 11 in the valve closing direction when the throttle valve 3 is at the default opening degree. When the protrusion 7a abuts against the default screw 11, the rotation of the default lever 7 in the valve closing direction is restricted. That is, the rotation of the default lever 7 in the valve closing direction is restricted at the default opening degree.

[0029] The default spring 8 is interposed between the valve gear 6 and the default lever 7 and rotatably connects the valve gear 6 and the default lever 7. In this embodiment, the default spring 8 is a coil spring. When the valve gear 6 is rotated in the valve closing direction with respect to the default lever 7 defined at the default opening degree, the default spring 8 elastically deforms and biases the valve gear 6 in the valve opening direction. By such a default spring 8, the valve gear 6 rotated until the throttle valve 3 reaches the valve closing angle is biased until the throttle valve 3 returns to the default opening degree.

[0030] The return spring 9 is interposed between the default lever 7 and the throttle body 2. This return spring 9 biases the default lever 7 in the valve closing direction. Also, the return spring 9 biases the valve gear 6 connected to the default lever 7 via the default spring 8 in the valve closing direction. That is, the return spring 9 biases the valve gear 6 and the default lever 7 in the valve closing direction.

[0031] The stop screw 10 is a stopper against which the protrusion 6c of the valve gear 6 abuts, and restricts the rotation of the valve gear 6 in the valve closing direction. This stop screw 10 is screwed to the throttle body 2, and by rotating it, the protruding amount from the throttle body 2 can be changed. By adjusting the protruding amount of the stop screw 10 from the throttle body 2, the position where the valve gear 6 abuts against the stop screw 10 can be adjusted. Therefore, by adjusting the protruding amount of the stop screw 10 from the throttle body 2, it becomes possible to adjust the valve closing angle.

[0032] The default screw 11 is a stopper against which the protrusion 7a of the default lever 7 abuts, and restricts the rotation of the default lever 7 in the valve closing direction. This default screw 11 is screwed to the throttle body 2, and by rotating it, the protruding amount from the throttle body 2 can be changed. By adjusting the protruding amount of the default screw 11 from the throttle body 2, the position where the default lever 7 abuts against the default screw 11 can be adjusted. Therefore, by adjusting the protruding amount of the default screw 11 from the throttle body 2, it becomes possible to adjust the default angle.

[0033] The counter gear 12, the counter gear shaft 13, and the pinion gear 14 transmit the rotational power generated by the motor 15 to the valve gear 6. The counter gear 12 meshes with the valve gear 6 and the pinion gear 14. The counter gear shaft 13 is rotatably connected to the throttle body 2, and the counter gear 12 is fixed to the tip end portion thereof. The pinion gear 14 is fixed to the output shaft of the motor 15.

[0034] The motor 15 is housed in the throttle body 2, and the output shaft is fixed to the pinion gear 14. The motor 15 is connected to a power supply device (not shown), and converts the electric power supplied from the power supply device into rotational power.

[0035] FIG. 4 is a schematic view of an angle adjustment jig 20 used in the manufacturing method of the throttle device 1 of the present embodiment. The angle adjustment jig 20 is a jig for applying torque to the valve gear 6 during the assembly (manufacture) of the throttle device 1. As shown in FIG. 4, the angle adjustment jig 20 includes a servo motor 21 and a mover 22.

[0036] The servo motor 21 generates rotational power to be applied to the valve gear 6. The servo motor 21 is connected to a control device (not shown) and a power supply device (not shown), and converts the power supplied from the power supply device into rotational power under the control of the control device.

[0037] The mover 22 is fixed to the output shaft of the servo motor 21. The mover 22 is rotatable in the circumferential direction about the output shaft of the servo motor 21. As shown in FIG. 4, the mover 22 has a plurality of protruding portions 22a that protrude toward the side opposite to the servo motor 21. The number of these protruding portions 22a is the same as the number of mounting holes 6a1 of the valve gear 6. That is, four protruding portions 22a are provided in the present embodiment. However, when the number of the mounting holes 6a1 is different, the number of the protruding portions 22a is changed according to the number of the mounting holes 6a1. These protruding portions 22a are arranged annularly about the output shaft of the servo motor 21.

[0038] These protruding portions 22a are arranged in the same arrangement pattern as the mounting holes 6a1 and are arranged so as to be insertable into the mounting holes 6a1. That is, the mover 22 has a plurality of protruding portions 22a that come into contact with the valve gear 6. Note that instead of the mounting holes 6a1, protrusions may be provided, and tip holes into which the protrusions are inserted may be provided in the protruding portions 22a. Note that instead of the mounting holes 6a1, protrusions may be provided, and instead of the protruding portions 22a, hole portions may be provided in the mover 22.

[0039] FIG. 5 is an explanatory diagram showing a state in which the angle adjustment jig 20 is connected to the throttle device 1 during assembly. As shown in FIG. 5, the angle adjustment jig 20 is connected to the valve gear 6 in a state where the counter gear 12 and the counter gear shaft 13 are not attached to the throttle body 2. Such an angle adjustment jig 20 applies torque to the valve gear 6 from the outside of the throttle device 1 during the assembly (manufacture) of the throttle device 1. That is, the angle adjustment jig 20 applies torque to the valve gear 6 that simulates the torque applied to the valve gear 6 from the motor 15 after completion.

[0040] Subsequently, with reference to FIGS. 6 to 8, the manufacturing method of the throttle device 1 of the present embodiment will be described. The manufacturing method of the throttle device 1 of the present embodiment performs default angle setting and closing valve angle setting during the assembly of the throttle device 1. Therefore, in the following description, the default angle setting and the closing valve angle setting will be described. In FIGS. 6 to 8, the angle adjustment jig 20 is omitted.

[0041] In the manufacturing method of the throttle device 1 of the present embodiment, the default angle setting is performed before the closing valve angle setting. Here, the valve gear 6 and the default lever 7 are integrally rotated to adjust the position that restricts the rotation of the default lever 7 in the closing valve direction. Specifically, as shown in FIG. 6, the protruding amount of the default screw 11 from the throttle body 2 is adjusted to adjust the position of the default opening degree. The step shown in FIG. 6 is a default angle setting step of integrally rotating the valve gear 6 and the default lever 7 to adjust the position that restricts the rotation of the default lever 7 in the closing valve direction.

[0042] In the default angle setting step, it is preferable to connect the encoder 30 to one end 4a of the throttle shaft 4. By connecting the encoder 30 to one end 4a of the throttle shaft 4, the rotation angle of the throttle valve 3 can be accurately grasped.

[0043] In such a default angle setting process, the valve gear 6 and the default lever 7 can be rotated using the angle adjustment jig 20. In such a case, the protruding portion 22a of the angle adjustment jig 20 is inserted into the mounting hole 6a1 of the valve gear 6, and the valve gear 6 is rotated by the servo motor 21. The default lever 7 is rotated together with the valve gear 6.

[0044] Subsequently, in the manufacturing method of the throttle device 1 of the present embodiment, the closing valve angle is set. Here, with the rotation of the default lever 7 in the closing valve direction restricted at the default angle, an external force is applied from outside the throttle device 1 to rotate the valve gear 6 in the closing valve direction. Specifically, as shown in FIG. 7, the protruding portion 22a of the angle adjustment jig 20 is inserted into the mounting hole 6a1 of the valve gear 6, and the valve gear 6 is rotated in the closing valve direction by the servo motor 21. The process shown in FIG. 7 like this is a closing valve angle setting process of applying an external force from outside the throttle device 1 to rotate the valve gear 6 in the closing valve direction with the rotation of the default lever 7 in the closing valve direction restricted at the default angle.

[0045] In addition, in the closing valve angle setting process, it is preferable to connect the encoder 30 to one end 4a of the throttle shaft 4. By connecting the encoder 30 to one end 4a of the throttle shaft 4, the rotation angle of the throttle valve 3 can be accurately grasped.

[0046] In such a closing valve angle setting process, the rotation of the default lever 7 in the closing valve direction is restricted by the default screw 11. Therefore, while the default spring 8 is elastically deformed, only the valve gear 6 among the default lever 7 and the valve gear 6 is rotated in the closing valve direction. Then, the protruding amount of the stop screw 10 from the throttle body 2 is adjusted so that the stop screw 10 abuts against the protrusion 6c of the valve gear 6 in a state where the throttle valve 3 has reached the closing valve angle.

[0047] Here, when the protrusion 6c of the valve gear 6 abuts against the stop screw 10, in addition to the biasing force of the return spring 9, the torque of the servo motor 21 of the angle adjustment jig 20 acts on the valve gear 6. Therefore, even when the motor 15 and the valve gear 6 are not connected, a force similar to the state where the motor 15 and the valve gear 6 are connected can be applied to the valve gear 6. That is, in the present embodiment, when setting the valve closing angle, in addition to the biasing force of the return spring 9, torque is applied to the valve gear 6 from the outside of the throttle device 1. Therefore, in the manufacturing method of the throttle device 1 of the present embodiment, the valve closing angle can be set in a state similar to the state of being actually mounted on a vehicle.

[0048] As shown in FIG. 8, when the protruding amount of the stop screw 10 and the protruding amount of the default screw 11 are determined, with the throttle valve 3 in the valve closing angle state, the control device (not shown) stores the valve closing angle. The valve closing angle stored in the control device in this way is set in a state similar to the state of being actually mounted on a vehicle by applying torque to the valve gear 6 from the outside of the throttle device 1. Therefore, when the throttle device 1 is controlled by the control device in a vehicle, it is possible to suppress an error from occurring between the command value and the actual rotation angle.

[0049] In the manufacturing method of the throttle device 1 of the present embodiment as described above, the throttle device 1 to be manufactured includes a throttle valve 3, a throttle shaft 4, a valve gear 6, a default lever 7, a return spring 9, and a default spring 8. The throttle valve 3 is rotatable in the valve closing direction and the valve opening direction, and adjusts the opening degree of the throttle bore 2a according to the rotation angle. The throttle shaft 4 has the throttle valve 3 attached thereto. The valve gear 6 is fixed to the throttle shaft 4. The default lever 7 is rotatably connected to the valve gear 6, and the rotation in the valve closing direction is restricted by the default angle. The return spring 9 biases the valve gear 6 and the default lever 7 in the valve closing direction. The default spring 8 rotatably connects the valve gear 6 and the default lever 7.

[0050] The manufacturing method of the throttle device 1 of the present embodiment includes a default angle setting step and a valve closing angle setting step. In the default angle setting step, the valve gear 6 and the default lever 7 are integrally rotated to adjust the position that restricts the rotation of the default lever 7 in the valve closing direction. In the valve closing angle setting step, with the rotation of the default lever 7 in the valve closing direction restricted at the default angle, an external force is applied from outside the throttle device 1 to rotate the valve gear 6 in the valve closing direction, and the position that restricts the rotation of the valve gear 6 in the valve closing direction is adjusted.

[0051] According to the manufacturing method of the throttle device 1 of the present embodiment as described above, after the default angle is set, the closing valve angle can be set with an external force applied to the valve gear 6 from outside the throttle device 1 in addition to the biasing force of the return spring 9. Therefore, the manufacturing method of the throttle device 1 of the present embodiment can set the opening valve angle in a state closer to actual vehicle mounting as compared with the case where the closing valve angle is set with only the biasing force of the return spring 9 acting on the valve gear 6. Thus, according to the manufacturing method of the throttle device 1 of the present embodiment, it is possible to suppress the occurrence of an error in the flow path opening degree in the throttle device 1.

[0052] Further, in the manufacturing method of the throttle device 1 of the present embodiment, in the valve closing angle setting step, an external force is applied to the valve gear 6 using the angle adjustment jig 20. By applying an external force to the valve gear 6 using such an angle adjustment jig 20, it becomes possible to easily and accurately apply an external force to the valve gear 6.

[0053] Further, the angle adjustment jig 20 includes a servo motor 21 and a mover 22. The servo motor 21 generates rotational power. The mover 22 is connected to the servo motor 21 and abuts against the valve gear 6.

[0054] Such a jig 20 for angle adjustment can apply torque to the valve gear 6 by bringing the mover 22 into contact with the valve gear 6. Therefore, by using the jig 20 for angle adjustment, it is possible to apply an external force to the valve gear 6 by simple operations.

[0055] Also, the mover 22 has a plurality of protrusions 22a that can contact the valve gear 6. Such a jig 20 for angle adjustment can be easily connected to the valve gear 6, for example, by inserting the protrusion 22a into the valve gear 6.

[0056] In the manufacturing method of the throttle device 1 of the present embodiment, in the default angle setting step, the valve gear 6 and the default lever 7 are integrally rotated using the jig 20 for angle adjustment. According to such a manufacturing method of the throttle device 1 of the present embodiment, the valve gear 6 and the default lever 7 can be rotated more easily than when the valve gear 6 and the default lever 7 are rotated by the operator's hand.

[0057] In the manufacturing method of the throttle device 1 of the present embodiment, an encoder is connected to one end of the throttle shaft 4 in at least one of the default angle setting step and the closing valve angle setting step. According to such a manufacturing method of the throttle device 1 of the present embodiment, the rotation angle of the throttle valve 3 can be easily and accurately grasped.

[0058] The motor provided in the jig 20 for angle adjustment is a servo motor 21. Therefore, it is possible to finely adjust the torque applied from the jig 20 for angle adjustment to the valve gear 6.

[0059] In addition, the angle adjustment jig 20 of the present embodiment is used for manufacturing the throttle device 1. The throttle device 1 manufactured using the angle adjustment jig 20 includes a throttle valve 3, a throttle shaft 4, a valve gear 6, a default lever 7, a return spring 9, and a default spring 8. The throttle valve 3 is rotatable in the valve closing direction and the valve opening direction, and adjusts the opening degree of the throttle bore 2a according to the rotation angle. The throttle shaft 4 has the throttle valve 3 attached thereto. The valve gear 6 is fixed to the throttle shaft 4. The default lever 7 is rotatably connected to the valve gear 6, and the rotation in the valve closing direction is restricted by the default angle. The return spring 9 biases the valve gear 6 and the default lever 7 in the valve closing direction. The default spring 8 rotatably connects the valve gear 6 and the default lever 7.

[0060] The angle adjustment jig 20 of the present embodiment applies an external force from the outside of the throttle device 1 to rotate the valve gear 6 in the valve closing direction. By using the angle adjustment jig 20 of the present embodiment like this, after the default angle is set, in addition to the biasing force of the return spring 9, the closing angle can be set in a state where an external force is applied to the valve gear 6 from the outside of the throttle device 1. Therefore, the angle adjustment jig 20 of the present embodiment can set the opening angle in a state closer to actual vehicle mounting as compared with the case where the closing angle is set in a state where only the biasing force of the return spring 9 acts on the valve gear 6. Therefore, according to the angle adjustment jig 20 of the present embodiment, it is possible to suppress the occurrence of an error in the flow path opening degree in the throttle device 1.

[0061] (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. 9. In the description of the present embodiment, the description of the same parts as those in the first embodiment will be omitted or simplified.

[0062] FIG. 9 is an explanatory diagram showing a state in which the angle adjustment jig 20 of the present embodiment is connected to the throttle device 1 during assembly. As shown in this figure, the angle adjustment jig 20 of the present embodiment includes a gear portion 22b (jig gear) and a mover shaft 22c in place of the protruding portion 22a of the mover 22.

[0063] As shown in FIG. 9, the gear portion 22b is a portion that meshes with the teeth 6b1 of the valve gear 6. The mover shaft 22c is rotatably connected to the throttle body 2. For example, the mover shaft 22c is connected to a portion that pivotally supports the counter gear shaft 13 of the throttle body 2, in place of the counter gear shaft 13.

[0064] According to such a present embodiment, torque is applied to the valve gear 6 using a gear, similar to the state of being mounted on an actual vehicle. Therefore, similar to the first embodiment, the valve opening angle can be set in a state close to actual vehicle mounting.

[0065] As described above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings. Needless to say, the present invention is not limited to the above embodiments. The various shapes and combinations of the constituent members shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements and the like without departing from the spirit of the present invention.

[0066] Note that the above embodiments can also be described, for example, as follows in the following supplementary notes.

[0067] (Supplementary Note 1) A method for manufacturing a throttle device, wherein the throttle device a throttle valve that is rotatable in a valve closing direction and a valve opening direction and adjusts the opening degree of the throttle bore according to the rotation angle, a throttle shaft to which the throttle valve is attached, a valve gear fixed to the throttle shaft, A default lever that is rotatably connected to the valve gear and whose rotation in the valve closing direction is restricted by a default angle, A return spring that biases the valve gear and the default lever in the valve closing direction, A default spring that rotatably connects the valve gear and the default lever and, A default angle setting step of integrally rotating the valve gear and the default lever to adjust a position that restricts the rotation of the default lever in the valve closing direction; A valve closing angle setting step of applying an external force from outside the throttle device to rotate the valve gear in the valve closing direction while restricting the rotation of the default lever in the valve closing direction at the default angle, and adjusting a position that restricts the rotation of the valve gear in the valve closing direction A method for manufacturing a throttle device, characterized by comprising:

[0068] (Appendix 2) The method for manufacturing a throttle device according to Appendix 1, wherein in the valve closing angle setting step, the external force is applied to the valve gear using an angle adjusting jig.

[0069] (Appendix 3) The angle adjusting jig A motor that generates rotational power, A mover that is connected to the motor and abuts against the valve gear The method for manufacturing a throttle device according to Appendix 2, characterized by comprising:

[0070] (Appendix 4) The method for manufacturing a throttle device according to Appendix 3, wherein the mover has a plurality of protrusions that can abut against the valve gear.

[0071] (Appendix 5) The method for manufacturing a throttle device according to Appendix 3, wherein the mover has a jig gear that meshes with the teeth of the valve gear.

[0072] (Appended Note 6) In the default angle setting step, the valve gear and the default lever are integrally rotated using the angle adjustment jig, and the manufacturing method of the throttle device according to any one of appended notes 2 to 5 is characterized in that.

[0073] (Appended Note 7) In at least one of the default angle setting step and the valve closing angle setting step, an encoder is connected to one end of the throttle shaft, and the manufacturing method of the throttle device according to any one of appended notes 1 to 6 is characterized in that.

[0074] (Appended Note 8) The motor is a servo motor, and the manufacturing method of the throttle device according to any one of appended notes 3 to 5 is characterized in that.

[0075] (Appended Note 9) The throttle device includes a throttle valve that is rotatable in the valve closing direction and the valve opening direction and adjusts the opening degree of the throttle bore according to the rotation angle, a throttle shaft to which the throttle valve is attached, a valve gear fixed to the throttle shaft, a default lever that is rotatably connected to the valve gear and whose rotation in the valve closing direction is restricted by a default angle, a return spring that biases the valve gear and the default lever in the valve closing direction, a default spring that rotatably connects the valve gear and the default lever and is provided with an angle adjustment jig that applies an external force from the outside of the throttle device to rotate the valve gear in the valve closing direction, and is characterized in that.

[0076] (Appended Note 10) a motor that generates rotational power, a mover that is connected to the motor and abuts against the valve gear The angle adjustment jig according to appended note 9, characterized by comprising

[0077] (Appended note 11) The angle adjustment jig according to appended note 10, characterized in that the mover has a plurality of protrusions capable of abutting against the valve gear.

[0078] (Appended note 12) The angle adjustment jig according to appended note 10, characterized in that the mover has a jig gear meshed with the teeth of the valve gear.

[0079] (Appended note 13) The angle adjustment jig according to any one of appended notes 10 to 12, characterized in that the motor is a servo motor.

Explanation of reference numerals

[0080] 1... Throttle device, 2... Throttle body, 2a... Throttle bore, 3... Throttle valve, 4... Throttle shaft, 4a... One end, 4b... The other end, 5... Main bearing, 6... Valve gear, 6a... Body part, 6a1... Mounting hole, 6b... Gear part, 6b1... Teeth, 6c... Protrusion, 7... Default lever, 7a... Protrusion, 8... Default spring, 9... Return spring, 10... Stop screw, 11... Default screw, 12... Counter gear, 13... Counter gear shaft, 14... Pinion gear, 15... Motor, 20... Angle adjustment jig, 21... Servo motor, 22... Mover, 22a... Protrusion, 22b... Gear part (jig gear), 22c... Mover shaft, 30... Encoder

Claims

1. A method for manufacturing a throttle device, comprising: wherein the throttle device includes: a throttle valve that is rotatable in a valve closing direction and a valve opening direction and adjusts the opening degree of a throttle bore according to the rotation angle; a throttle shaft to which the throttle valve is attached; a valve gear fixed to the throttle shaft; a default lever that is rotatably connected to the valve gear and whose rotation in the valve closing direction is restricted by a default angle; a return spring that biases the valve gear and the default lever in the valve closing direction; a default spring that rotatably connects the valve gear and the default lever; and comprising: a default angle setting step of integrally rotating the valve gear and the default lever to adjust a position that restricts the rotation of the default lever in the valve closing direction; a valve closing angle setting step of applying an external force from outside the throttle device to rotate the valve gear in the valve closing direction while restricting the rotation of the default lever in the valve closing direction at the default angle, and adjusting a position that restricts the rotation of the valve gear in the valve closing direction; A method for manufacturing a throttle device, characterized by comprising the above.

2. The method for manufacturing a throttle device according to claim 1, wherein in the valve closing angle setting step, the external force is applied to the valve gear using an angle adjustment jig.

3. The angle adjustment jig includes: a motor that generates rotational power; a mover that is connected to the motor and abuts against the valve gear. A method for manufacturing a throttle device according to claim 2, characterized by comprising the above.

4. The method for manufacturing a throttle device according to claim 3, wherein the mover has a plurality of protrusions that can abut against the valve gear.

5. The method for manufacturing a throttle device according to claim 3, wherein the mover has a jig gear that meshes with the teeth of the valve gear.

6. The method for manufacturing a throttle device according to any one of claims 2 to 5, wherein in the default angle setting step, the valve gear and the default lever are integrally rotated using the angle adjustment jig.

7. The method for manufacturing a throttle device according to any one of claims 1 to 5, wherein an encoder is connected to one end of the throttle shaft in at least one of the default angle setting step and the valve closing angle setting step.

8. The method for manufacturing a throttle device according to any one of claims 3 to 5, wherein the motor is a servo motor.

9. A throttle device includes a throttle valve that is rotatable in a valve closing direction and a valve opening direction and adjusts the opening degree of a throttle bore according to a rotation angle, a throttle shaft to which the throttle valve is attached, a valve gear fixed to the throttle shaft, a default lever that is rotatably connected to the valve gear and whose rotation in the valve closing direction is restricted by a default angle, a return spring that biases the valve gear and the default lever in the valve closing direction, and a default spring that rotatably connects the valve gear and the default lever. An angle adjustment jig, characterized in that an external force is applied from the outside of the throttle device to rotate the valve gear in the valve closing direction.

10. An angle adjustment jig according to claim 9, comprising a motor that generates rotational power and a mover that is connected to the motor and abuts against the valve gear.

11. The angle adjustment jig according to claim 10, wherein the mover has a plurality of protrusions that can abut against the valve gear.

12. The angle adjustment jig according to claim 10, wherein the mover has a jig gear that meshes with the teeth of the valve gear.

13. The angle adjustment jig according to any one of claims 10 to 12, wherein the motor is a servo motor. ​ ​ ​

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