Reset mechanism for electronic throttle body
By adopting a dual return spring structure and a split design in the electronic throttle body, the problem of insufficient accuracy caused by a single return spring is solved, achieving greater return force and precise control, and ensuring accurate valve reset.
Patent Information
- Application Number
- CN202521738573.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-15
- Publication Date
- 2026-05-15
- Estimated Expiration
- 2035-08-15
AI Technical Summary
In the existing technology, the single return spring design results in poor reset accuracy of the electronic throttle body, making it impossible to accurately control the valve's return position.
It adopts a double return spring structure, which includes a return gear, throttle shaft, valve plate, upper spring seat, lower spring seat and valve body stop assembly. The split structure and plastic lower spring seat reduce friction and realize bidirectional return function. The limit structure precisely controls the return speed and position of the valve.
It provides greater return force and more precise control, ensuring that the valve can be accurately reset to the default position, avoiding friction between the return spring and the valve body, and improving control accuracy and reliability.
Smart Images
Figure CN224244966U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic throttle body technology, and in particular to a reset mechanism for electronic throttle body. Background Technology
[0002] The electronic throttle body is a crucial component of a car engine. Employing an electronic throttle control system allows for precise control of the throttle opening, which can improve fuel economy and reduce emissions. Furthermore, the system offers rapid response and satisfactory control performance. Specifically, the electronic throttle body includes components such as a motor, sector gears, and a valve. The sector gears and motor are housed within the same valve body. The motor drives the sector gears to rotate, causing them to open or close the valve, thus precisely controlling the throttle opening and consequently the vehicle's air intake, and consequently, its speed. When the valve is in the emergency position, it opens at a preset angle to allow the vehicle to travel at low speeds.
[0003] When the motor is de-energized, the return spring can return the throttle body from the position above or below the emergency point to the emergency point position.
[0004] In related technologies, a single return spring is used to reset the throttle valve. One end of the return spring is connected to the valve body, and the other end is connected to the sector gear. When the motor drives the sector gear to rotate to control the valve rotation, the return spring is in a stretched state; when the motor stops running, the return spring retracts, causing the sector gear to rotate, thereby returning the valve to the emergency position.
[0005] However, the single return spring design offers poor control precision and cannot accurately return the valve to its default position. Utility Model Content
[0006] The purpose of this invention is to provide a reset mechanism for an electronic throttle body, thereby solving the technical problem of poor reset accuracy in existing single-spring designs. This invention has a simple structure and lower cost.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A reset mechanism for an electronic throttle body includes a reset gear, a throttle shaft, a valve plate, a first reset spring, a second reset spring, an upper spring seat, a lower spring seat, and a valve body stop assembly disposed on the inner wall of the valve body.
[0009] The valve plate is fixed on the throttle shaft, and the reset gear is fixed on one end of the throttle shaft; the upper spring seat and the lower spring seat are fitted onto the outside of the throttle shaft; the second reset spring is fitted between the outer wall of the lower spring seat and the inner wall of the upper spring seat; the first reset spring is fitted onto the outer wall of the upper spring seat.
[0010] The first return spring has a first torsion arm and a second torsion arm at its two ends, and the second return spring has a third torsion arm and a fourth torsion arm at its two ends.
[0011] The reset gear has a first foot that limits the first torsion arm, a second foot that limits the second torsion arm, and a torsion arm limiting hole that limits the third torsion arm.
[0012] The valve body stop assembly includes a first stop that prevents the fourth torsion arm from moving in a first direction A and a second stop that prevents the first torsion arm from moving in a second direction B.
[0013] When the valve plate is in the emergency position, the first torsion arm simultaneously abuts against the first support foot and the second stop, the second torsion arm abuts against the second support foot, the third torsion arm is placed in the torsion arm limiting hole and abuts against the side wall of the torsion arm limiting hole, and the fourth torsion arm abuts against the first stop.
[0014] Furthermore, the reset gear, upper spring seat, and lower spring seat are separate components.
[0015] Furthermore, both the first and second legs are L-shaped legs.
[0016] Furthermore, both the upper and lower spring seats are made of plastic.
[0017] Furthermore, the upper end of the third torsion arm bends laterally.
[0018] Furthermore, a hollow limiting post 1 with a downward protrusion is connected to the center position of the lower end face of the top of the reset gear; the upper spring seat includes a hollow cylinder 1 and a hollow limiting post 2 located in the inner cavity of the hollow cylinder 1; the upper end of the hollow limiting post 2 extends laterally and is integrally connected to the upper end of the hollow cylinder 1, and an annular upper end face is circumferentially connected to the upper end of the outer side of the hollow cylinder 1; there is an annular limiting space between the radial outer wall of the hollow limiting post 2 and the inner wall of the hollow cylinder 1.
[0019] Hollow limiting post one is inserted downward into the inner cavity of hollow limiting post two; the upper part of the second reset spring is placed in the annular limiting space;
[0020] Both the first and second hollow limiting posts are vertically connected.
[0021] Furthermore, the lower spring seat is composed of an annular lower seat surface and a hollow cylinder; the second return spring is a torsion spring, the inner diameter of the second return spring is larger than the outer diameter of the hollow cylinder, and the outer diameter of the second return spring is smaller than the outer diameter of the lower seat surface.
[0022] Furthermore, the fourth torsion arm extends out from the lower seat surface.
[0023] Furthermore, the valve body stop assembly also includes a third stop to prevent the first leg from continuously moving in the second direction B and a fourth stop to prevent the second leg from continuously moving in the first direction A.
[0024] Compared with the prior art, the present invention provides a reset mechanism for an electronic throttle body, which has the following advantages:
[0025] 1. In this utility model, each return spring is responsible for the return of the throttle plate in one direction, thereby realizing the bidirectional return function. This structure can provide a greater return force and, within the elastic range of the return spring, can more accurately control the return speed and position of the throttle.
[0026] 2. In this utility model, the second return spring is fitted between the outer wall of the lower spring seat and the inner wall of the upper spring seat; the first return spring is fitted onto the outer wall of the upper spring seat; the two return springs do not contact each other, thus avoiding friction between them.
[0027] 3. The lower spring seat consists of an annular lower seat surface and a hollow cylinder; the inner diameter of the second return spring is larger than the outer diameter of the hollow cylinder, and the outer diameter of the second return spring is smaller than the outer diameter of the lower seat surface.
[0028] After the second return spring is fitted onto the outer wall of the lower spring seat, the lower end of the second return spring will be supported on the upper end of the lower seat surface, which can prevent contact friction between the inner wall and the lower end of the second return spring and the valve body wall. Attached Figure Description
[0029] Figure 1 This is an exploded structural diagram of an electronic throttle body including the reset mechanism of this utility model.
[0030] Figure 2 This is a top view schematic diagram of the electronic throttle body including the reset mechanism of this utility model.
[0031] Figure 3 This is a perspective view of the electronic throttle body including the reset mechanism of this utility model (after removing the gear and upper spring seat).
[0032] Figure 4 This is a cross-sectional view of the electronic throttle body including the reset mechanism of this utility model.
[0033] Figure 5 This is a schematic diagram of the reset mechanism of this utility model. Figure 1 (Excluding valve body and valve body stop assembly).
[0034] Figure 6 This is a schematic diagram of the reset mechanism of this utility model. Figure 2 (Excluding valve body and valve body stop assembly).
[0035] Figure 7 This is a top view of the reset mechanism of this utility model (excluding the valve body and valve body stop assembly).
[0036] Figure 8 This is a schematic diagram of the connection structure of the reset gear, throttle shaft and valve plate in this utility model.
[0037] Figure 9 This is a schematic diagram of the connection structure of the upper spring seat, lower spring seat, first reset spring, and second reset spring in this utility model.
[0038] Figure 10 This is a schematic diagram of the reset gear in this utility model.
[0039] Figure 11 This is a schematic diagram of the structure of the first reset spring in this utility model.
[0040] Figure 12 This is a schematic diagram of the structure of the second reset spring in this utility model.
[0041] Figure 13 This is a cross-sectional view of the upper spring seat in this utility model.
[0042] Figure 14 This is a cross-sectional view of the lower spring seat in this utility model.
[0043] Figure 15 This is a schematic diagram showing the relative positions of the valve and valve body in the emergency position of this utility model.
[0044] In the picture:
[0045] 1-Reset gear, 2-Upper spring seat, 3-Lower spring seat, 4-Valve body, 5-First reset spring, 6-Second reset spring, 7-Throttle shaft, 8-Valve plate, 9-Annular limiting space, 10-Emergency point position;
[0046] 11-First support leg, 12-Second support leg, 13-Torsion arm limiting hole, 14-Hollow limiting post one;
[0047] 21-Hollow cylinder one, 22-Upper seat surface, 23-Hollow limiting post two;
[0048] 31-Hollow cylinder II; 32-Lower seat surface;
[0049] 41-First stop, 42-Second stop, 43-Third stop, 44-Fourth stop, 45-Hollow boss;
[0050] 51-First torsion arm, 52-Second torsion arm, 61-Third torsion arm, 62-Fourth torsion arm. Detailed Implementation
[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0052] like Figure 1 As shown, this utility model provides a reset mechanism for an electronic throttle body. The reset mechanism includes a reset gear 1, a throttle shaft 7, a valve plate 8, a first reset spring 5, a second reset spring 6, an upper spring seat 2, a lower spring seat 3, and a valve body stop assembly disposed on the inner wall of the valve body 4.
[0053] In this embodiment, the valve plate 8 is fixed on the throttle shaft 7, and the reset gear 1 is fixed on one end of the throttle shaft 7 (e.g., Figure 8 After the reset gear 1 rotates, it will drive the throttle shaft 7 to rotate, which in turn will drive the valve plate 8 to rotate synchronously.
[0054] In this embodiment, both the first reset spring 5 and the second reset spring 6 are torsion springs (e.g., Figure 11 and Figure 12 ).like Figures 4 to 6 As shown, in this embodiment, the upper spring seat 2 and the lower spring seat 3 are fitted onto the outside of the throttle body shaft 7; the second return spring 6 is fitted between the outer wall of the lower spring seat 3 and the inner wall of the upper spring seat 2; and the first return spring 5 is fitted onto the outer wall of the upper spring seat 2. Specifically, in this embodiment, a hollow boss 45 is also provided between the throttle body shaft 7 and the inner wall of the lower spring seat 3, meaning that the lower spring seat 3 is fitted onto the outside of the throttle body shaft 7 but does not directly contact the throttle body shaft 7.
[0055] The valve body stop assembly includes multiple stop parts distributed at intervals, and each stop part is located on the inner wall of the valve body.
[0056] Specifically, in this embodiment, the reset gear 1, the upper spring seat 2, and the lower spring seat 3 are separate structures, that is, three separate components that are detachably connected.
[0057] like Figure 4 As shown, in the assembled state, the lower spring seat 3 is fitted onto the outer ring of the hollow boss 45, which is part of the valve body 4. Due to the presence of the lower spring seat 3, the second return spring 6 does not contact the outer wall of the hollow boss 45, meaning there is no friction between them.
[0058] In this embodiment, the valve body 4 is made of metal (such as aluminum alloy). If the lower spring seat 3 is missing, the second return spring 6 made of metal will directly rub against the outer wall of the hollow boss 45 during the torsion process. During the friction process, the metal on the outer wall of the hollow boss 45 may be scraped off, such as small metal wires or metal shavings scraped off the outer wall of the hollow boss 45.
[0059] like Figure 4 and Figure 14 As shown, in this embodiment, the lower spring seat 3 is made of plastic and consists of an annular lower seat surface 32 and a hollow cylinder 31. The inner diameter of the second return spring 6 is larger than the outer diameter of the hollow cylinder 31, and the outer diameter of the second return spring 6 is smaller than the outer diameter of the lower seat surface 31. Thus, the lower end of the second return spring 6 can be supported on the upper end of the lower seat surface 32, and the second return spring 6 is sleeved on the outer wall of the plastic hollow cylinder 31. This ensures that the inner ring and lower end face of the second return spring 6 do not contact the valve body 4, effectively avoiding friction between the metal second return spring 6 and the metal valve body 4, as well as the problem of metal chips caused by friction.
[0060] like Figure 11 As shown, the first return spring 5 has a first torsion arm 51 and a second torsion arm 52 at its two ends, and the part between the first torsion arm 51 and the second torsion arm 52 is a first spiral rotating body part; in this embodiment, the first torsion arm 51, the first spiral rotating body part and the second torsion arm 52 are integrally connected.
[0061] like Figure 12 As shown, the second return spring 6 has a third torsion arm 61 and a fourth torsion arm 62 at its two ends, and the part between the third torsion arm 61 and the fourth torsion arm 62 is the second helical rotating body part; in this embodiment, the third torsion arm 61, the second helical rotating body part and the fourth torsion arm 62 are integrally connected.
[0062] Preferably, such as Figure 9 and Figure 10 As shown, in this embodiment, the upper end of the third torsion arm 61 passes upward through the through hole on the upper spring seat 2 and then inserts into the torsion arm limiting hole 13 on the reset gear 1. Furthermore, in this embodiment, the upper end of the third torsion arm 61 is bent laterally, as shown... Figure 12 As shown, this allows for a greater contact area between the upper end of the third torsion arm 61 and the inner wall of the torsion arm limiting hole 13.
[0063] like Figure 10As shown, the reset gear 1 has a first foot 11 that limits the first torsion arm 51, a second foot 12 that limits the second torsion arm 52, and a torsion arm limiting hole 13 that limits the third torsion arm 61. The first foot 11 can limit the movement of the first torsion arm 51 relative to the reset gear 1 in the second direction B, and the second foot 12 can limit the movement of the second torsion arm 52 relative to the reset gear 1 in the first direction A.
[0064] Preferably, such as Figure 10 As shown, a hollow limiting post 14 with a downward protrusion is connected to the center of the lower top surface of the reset gear 1.
[0065] like Figure 13 As shown, the upper spring seat 2 includes a hollow cylinder 21 and a hollow limiting post 23 located inside the cavity of the hollow cylinder 21. The upper end of the hollow limiting post 23 extends laterally and is integrally connected to the upper end of the hollow cylinder 21. An annular upper end surface 22 is integrally connected to the upper circumferential surface of the hollow cylinder 21. There is an annular limiting space 9 between the radial direction of the outer wall of the hollow limiting post 23 and the inner wall of the upper spring seat 2.
[0066] like Figure 4 As shown, the hollow limiting post 14 is inserted downward into the inner cavity of the hollow limiting post 23; the upper part of the second reset spring 6 is placed in the annular limiting space 9.
[0067] Preferably, such as Figure 10 As shown, the hollow limiting post 14 also includes multiple spaced protrusions arranged radially on its outer wall. When the hollow limiting post 14 is inserted downward into the inner cavity of the hollow limiting post 23, the protrusions abut against the inner wall of the hollow limiting post 23, thus achieving a tight fit between the hollow limiting post 14 and the inner cavity of the hollow limiting post 23, while also reducing the contact area between the outer wall of the hollow limiting post 14 and the inner wall of the hollow limiting post 23, effectively controlling the friction between them. Figure 4 As shown, the upper part of the throttle shaft 7 passes through the inner cavity of the hollow limiting post 14 and the inner cavity of the hollow limiting post 23.
[0068] Preferably, in this embodiment, both the first leg 11 and the second leg 12 are L-shaped legs. For example... Figure 10 As shown, the L-shaped support consists of a longitudinal extension section and a transverse extension section. The transverse extension section is connected to the lower end of the longitudinal extension section, and the connected longitudinal extension section and transverse extension section form an L-shape.
[0069] After the first torsion arm 51 abuts against the side of the longitudinal extension of the first leg 11, the lateral extension of the first leg 11 is located below the first torsion arm 51, thus limiting the first torsion arm 51 from below. Similarly, when the second torsion arm 52 abuts against the side of the longitudinal extension of the second leg 12, the lateral extension of the second leg 12 is located below the second torsion arm 52, thus limiting the second torsion arm 52 from below.
[0070] like Figure 3 and Figure 7 As shown, the valve body stop assembly on the valve body 4 includes a total of 4 stop parts, specifically a first stop part 41 that prevents the fourth torsion arm 62 from moving in the first direction A, a second stop part 42 that prevents the first torsion arm 51 from moving in the second direction B, a third stop part 43 that prevents the first support leg 11 from continuously moving in the second direction B, and a fourth stop part 44 that prevents the second support leg 12 from continuously moving in the first direction A.
[0071] Specifically, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In the middle, valve disc 8 is in the emergency point position. When valve disc 8 is in the emergency point position 10, the relative position between valve disc 8 and the valve body cavity is as follows: Figure 15 As shown.
[0072] When the motor does not apply force to the reset gear 1, the valve plate 8 is in the emergency position. For example... Figure 2 and Figure 3 As shown, in this embodiment, when the valve plate 8 is in the emergency position 10, the first torsion arm 51 simultaneously abuts against the first support leg 11 and the second stop part 42, the second torsion arm 52 abuts against the second support leg 12, the third support leg 61 is placed in the torsion arm limiting hole 13 and abuts against the side wall of the torsion arm limiting hole 13, and the fourth support leg 62 extends out of the lower seat surface 32 and abuts against the first stop part 41.
[0073] Both the first direction A and the second direction B are circumferential rotation directions. Driven by the motor, the reset gear 1 can rotate along the first direction A or the second direction B, thereby causing the valve plate 8 to deviate from the emergency point position.
[0074] When valve plate 8 is in the emergency position, a force is applied to the reset gear 1 to cause it to rotate in the second direction B. After the reset gear 1 rotates in the second direction B, the first torsion arm 51 is blocked by the second stop 42 and cannot move in the second direction B, while the first support leg 11 can rotate with the reset gear 1 until it comes into contact with the third stop 43 and stops. During the above process, the first helical rotating part of the first reset spring 5 is twisted by force, and the first torsion arm 51 separates from the first support leg 11. When the first support leg 11 comes into contact with the third stop 43, the first support leg 11 is blocked and cannot continue to rotate in the second direction B. At this time, the reset gear 1 can also not continue to rotate in the second direction B. After the applied force disappears during the above process, the first reset spring 5 resets, and the first reset spring 5 drives the reset gear 1 to rotate in the opposite direction, and finally the valve plate 8 returns to the emergency position.
[0075] Similarly, when valve plate 8 is in the emergency position, a force is applied to the reset gear 1 to cause it to rotate in the first direction A. After the reset gear 1 rotates in the first direction A, the fourth torsion arm 62 is blocked by the first stop 41 and cannot move in the first direction A. The second helical rotating part of the second reset spring 6 is twisted by the force, and the first support leg 11, the first torsion arm 51, the second support leg 12, and the second torsion arm 52 deviate from their original positions in the first direction A. When the second support leg 12 abuts against the fourth stop 44, the second support leg 12 is blocked and cannot continue to rotate in the first direction A. At this time, the reset gear 1 cannot continue to rotate in the first direction A. During the above process, when the applied force disappears, the second reset spring 6 resets, and the second reset spring 6 drives the reset gear 1 to rotate in the opposite direction, and finally the valve plate 8 returns to the emergency position.
[0076] In this invention, a double return spring structure is adopted, with each return spring responsible for the return of the throttle valve in one direction, thereby realizing a bidirectional return function. This structure can provide a greater return force and, within the elastic range of the return spring, can more accurately control the return speed and position of the throttle valve.
Claims
1. A reset mechanism for an electronic throttle body, characterized in that: It includes a reset gear (1), a throttle shaft (7), a valve plate (8), a first reset spring (5), a second reset spring (6), an upper spring seat (2), a lower spring seat (3), and a valve body stop assembly disposed on the inner wall of the valve body (4); The valve plate (8) is fixed on the throttle shaft (7), and the return gear (1) is fixed on one end of the throttle shaft (7); the upper spring seat (2) and the lower spring seat (3) are fitted on the outside of the throttle shaft (7); the second return spring (6) is fitted between the outer wall of the lower spring seat (3) and the inner wall of the upper spring seat (2); the first return spring (5) is fitted on the outer wall of the upper spring seat (2); The first return spring (5) has a first torsion arm (51) and a second torsion arm (52) at its two ends, and the second return spring (6) has a third torsion arm (61) and a fourth torsion arm (62) at its two ends. The reset gear (1) has a first foot (11) for limiting the first torsion arm (51), a second foot (12) for limiting the second torsion arm (52), and a torsion arm limiting hole (13) for limiting the third torsion arm (61). The valve body stop assembly includes a first stop (41) that prevents the fourth torsion arm (62) from moving in the first direction A and a second stop (42) that prevents the first torsion arm (51) from moving in the second direction B; When the valve plate (8) is in the emergency position, the first torsion arm (51) abuts against the first support foot (11) and the second stop (42) at the same time, the second torsion arm (52) abuts against the second support foot (12), the third torsion arm (61) is placed in the torsion arm limiting hole (13) and abuts against the side wall of the torsion arm limiting hole (13), and the fourth torsion arm (62) abuts against the first stop (41).
2. The reset mechanism for an electronic throttle body according to claim 1, characterized in that: The reset gear (1), upper spring seat (2) and lower spring seat (3) are separate structures.
3. The reset mechanism for an electronic throttle body according to claim 2, characterized in that: Both the first leg (11) and the second leg (12) are L-shaped legs.
4. The reset mechanism for an electronic throttle body according to claim 1, characterized in that: Both the upper spring seat (2) and the lower spring seat (3) are made of plastic.
5. A reset mechanism for an electronic throttle body according to any one of claims 1-4, characterized in that: The upper end of the third torsion arm (61) is bent laterally.
6. A reset mechanism for an electronic throttle body according to any one of claims 1-4, characterized in that: A hollow limiting post 1 (14) with a downward protrusion is connected to the center of the lower end face of the reset gear (1); the upper spring seat (2) includes a hollow cylinder 1 (21) and a hollow limiting post 2 (23) located in the inner cavity of the hollow cylinder 1 (21); the upper end of the hollow limiting post 2 (23) extends laterally and is integrally connected to the upper end of the hollow cylinder 1 (21); an annular upper end face (22) is circumferentially connected to the upper end of the hollow cylinder 1 (21); there is an annular limiting space (9) between the radial direction of the outer wall of the hollow limiting post 2 (23) and the inner wall of the hollow cylinder 1 (21); Hollow limiting post one (14) is inserted downward into the inner cavity of hollow limiting post two (23); the upper part of the second reset spring (6) is placed in the annular limiting space (9); Hollow limiting post one (14) and hollow limiting post two (23) are both vertically connected.
7. A reset mechanism for an electronic throttle body according to claim 6, characterized in that: The lower spring seat (3) is composed of an annular lower seat surface (32) and a hollow cylinder (31); the second return spring (6) is a torsion spring, the inner diameter of the second return spring (6) is larger than the outer diameter of the hollow cylinder (31), and the outer diameter of the second return spring (6) is smaller than the outer diameter of the lower seat surface (32).
8. A reset mechanism for an electronic throttle body according to claim 7, characterized in that: The fourth torsion arm (62) extends out of the lower seat surface (32).
9. A reset mechanism for an electronic throttle body according to any one of claims 1-4, characterized in that: The valve body stop assembly also includes a third stop (43) to prevent the first leg (11) from moving continuously in the second direction B and a fourth stop (44) to prevent the second leg (12) from moving continuously in the first direction A.