Carburetor for automatically controlling engine throttle opening

Abstract

The present disclosure relates to the carburetor technical field, especially to the carburetor of automatic control engine throttle opening degree. Its technical scheme includes: the carburetor part shell, the throttle rotatingly connected in the carburetor part shell and the pull rod connected with the external throttle handle through the connecting rod structure, the throttle fixedly connected with the throttle connecting shaft, including opening degree limiting mechanism, the opening degree limiting mechanism includes the stop lever fixed to the outer wall of the throttle connecting shaft, the arc-shaped mounting seat arranged on the outer wall of the carburetor part shell and the stopper slidingly connected with the arc-shaped mounting seat. The present disclosure can limit the opening degree of the throttle by the design of the opening degree limiting mechanism, mainly limit the maximum opening degree value, avoid the accident caused by the speed being too fast due to the accidental operation of increasing the throttle, and through the sliding design between the stopper and the arc-shaped mounting seat, the upper limit of the maximum opening degree can be adjusted by adjusting the position of the stopper, so that the user can select different gear adjustments according to the actual needs and personal habits.

Description

Technical Field

[0001] This disclosure relates to the field of carburetor technology, and more particularly to a carburetor for automatically controlling the engine throttle opening. Background Technology

[0002] A carburetor is a mechanical device that mixes gasoline and air in a specific ratio under the vacuum created by the engine's operation. As a precision mechanical device, the carburetor utilizes the kinetic energy of the intake airflow to atomize the gasoline. Its crucial role in the engine can be described as its "heart." The carburetor automatically prepares and outputs the appropriate mixture based on the engine's different operating conditions. To ensure a more uniform mixture, the carburetor also atomizes the fuel for proper machine operation. Today, carburetors are widely used in agricultural machinery, motorcycles, and other equipment.

[0003] Carburetors require coordination with the throttle, using external control mechanisms such as throttle levers and pedals to control the throttle opening and thus engine power. Higher levels of control over these mechanisms result in higher power output. However, since operation is entirely dependent on human judgment, accidental over-throttle opening can easily lead to accidents. Therefore, this disclosure proposes a carburetor that automatically controls engine throttle opening. Summary of the Invention

[0004] The purpose of this disclosure is to address the problems existing in the prior art by proposing a carburetor that automatically controls the engine throttle opening.

[0005] The technical solution disclosed herein is as follows: A carburetor for automatically controlling the throttle opening of an engine, comprising a carburetor housing, a throttle rotatably connected within the carburetor housing, and a lever connected to an external throttle operating lever via a linkage structure. The throttle is fixedly connected to a throttle connecting shaft. The carburetor also includes an opening limiting mechanism, comprising a stop bar fixed to the outer wall of the throttle connecting shaft, an arc-shaped mounting base disposed on the outer wall of the carburetor housing, and a stop block slidably connected to the arc-shaped mounting base. The stop block blocks the stop bar to limit the throttle opening. A mode switching mechanism is also included, comprising a horizontally movable connecting ring. A throttle connecting ring is fixedly connected to the end of the throttle connecting shaft. The throttle connecting ring and the connecting bar ring are slidably sleeved. By sliding the connecting bar ring to different positions of the throttle connecting ring, the throttle can be rotated in different directions to switch the opening size.

[0006] Optionally, a mounting base is fixedly connected to the outer wall of the carburetor housing, and a mounting bracket is fixedly connected to the upper surface of the mounting base.

[0007] Optionally, the opening limiting mechanism includes a fixed plate fixedly connected to the top of the fixed frame, and the arc-shaped mounting base is fixedly connected to the fixed plate.

[0008] Optionally, a strip plate is slidably connected to the outer wall of the fixing plate through a first guide groove. The strip plate is rotatably connected to one end of the connecting section, and the other end of the connecting section is rotatably connected to the bottom end of the connecting rod.

[0009] Optionally, the fixing frame is fixedly connected to a first cylinder, the piston rod of the first cylinder is fixedly connected to a connecting vertical shaft, and the strip plate is provided with a strip groove for the connecting vertical shaft to slide horizontally.

[0010] Optionally, the connecting vertical shaft is fixedly sleeved with a pair of limiting plates with a diameter greater than the width of the strip groove, and the two limiting plates are respectively located on the upper and lower sides of the strip groove.

[0011] Optionally, the mode switching mechanism includes a second cylinder fixed to the upper surface of the fixed base. A connecting sleeve is fixedly connected to the piston rod end of the second cylinder. A connecting shaft is vertically movably sleeved on the top end of the connecting sleeve. The top end of the connecting shaft is fixedly connected to a connecting ring, and the top end of the connecting ring is fixedly connected to the bottom end of the pull rod.

[0012] Optionally, a filtration mechanism is included for filtering the air entering the carburetor housing. The filtration mechanism includes a housing fixedly connected to the outer wall of the carburetor housing, a filter element installed inside the housing, and a scraper fixedly connected to the housing for removing dust from the filter element.

[0013] Optionally, an automatic dust removal mechanism is included, which drives the filter element to rotate through the rotation of the throttle connecting shaft.

[0014] Optionally, the automatic dust removal mechanism includes a bearing fixedly connected to the housing, a horizontal wheel axle rotatably connected to the bottom end of the bearing, a friction-enhancing wheel and a ratchet fixedly connected to both ends of the horizontal wheel axle respectively, and a push rod fixedly connected to the outer wall of the throttle connecting shaft tangent to the filter element.

[0015] Compared with the prior art, this disclosure has the following beneficial technical effects: This application, through the design of an opening limit mechanism, can limit the opening of the throttle, mainly to limit its maximum opening value, to prevent accidental over-throttle operation that could lead to excessive speed and accidents. Furthermore, through the sliding design between the stop block and the arc-shaped mounting base, the upper limit of the maximum opening can be adjusted by adjusting the position of the stop block, allowing users to select different levels of adjustment according to actual needs and personal habits. Furthermore, the mode switching mechanism can drive the throttle to rotate in different directions. Combined with the opening limit mechanism, two throttle control modes can be realized. When the throttle is rotated counterclockwise, the opening is limited by the opening limit mechanism, which is suitable for beginners or places that require low-speed operation. When the throttle is rotated clockwise, it can be opened to the maximum angle, that is, the throttle is fully opened. The throttle control is entirely manual, which is suitable for experienced drivers or places that require high-speed operation. Furthermore, the air entering the carburetor housing is filtered by the filtration mechanism, and the filter element is rotated by the opening and closing of the throttle in conjunction with the automatic dust removal mechanism, so that the filter element and the scraper move relative to each other to achieve the purpose of scraping and cleaning. Attached Figure Description

[0016] Figure 1 A schematic diagram of a carburetor for automatically controlling engine throttle opening; Figure 2 for Figure 1 A schematic diagram of the structure when the middle connecting ring is located at the other end of the throttle connecting ring; Figure 3 This is a schematic diagram of the opening limit mechanism; Figure 4 This is a schematic diagram showing the connection between the filtration mechanism and the automatic dust removal mechanism. Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 for Figure 3 A schematic diagram of the structure of the arc-shaped mounting base and the strip plate.

[0017] Attached reference numerals: 1. Carburetor housing; 2. Throttle; 21. Throttle connecting shaft; 22. Throttle connecting ring; 3. Pull rod; 4. Fixture; 5. Fixture; 6. Opening limit mechanism; 61. Fixing plate; 611. First guide groove; 612. Second guide groove; 62. Arc-shaped mounting base; 621. Guide slide groove; 63. Connecting rod; 631. Positioning piece; 64. Stop block; 65. Strip plate; 651. Strip groove; 66. Connecting section; 67. First cylinder; 68. Connecting vertical shaft; 681. Limiting piece; 69. Stop bar; 7. Mode switching mechanism; 71. Second cylinder; 72. Connecting bushing; 73. Connecting shaft; 74. Connecting ring; 8. Filtration mechanism; 81. Housing; 82. Filter element; 83. Scraper; 9. Automatic dust removal mechanism; 91. Shaft seat; 92. Friction enhancer wheel; 93. Ratchet; 931. Fixing block; 932. Pawl; 933. Leaf spring; 94. Push rod. Detailed Implementation

[0018] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0019] In the description of this disclosure, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0021] Example 1

[0022] like Figure 1-6 As shown, the carburetor for automatically controlling the engine throttle opening proposed in this disclosure includes a carburetor housing 1, a throttle 2 rotatably connected within the carburetor housing 1, and a lever 3 connected to an external throttle operating handle (throttle pedal, throttle lever, throttle handle, etc.) via a linkage structure. Since the connection between the lever 3 and the throttle operating handle, as well as the rest of the carburetor structure, are all prior art, they will not be described in detail here.

[0023] In this embodiment, the throttle 2 is fixedly connected to a throttle connecting shaft 21, the throttle connecting shaft 21 is rotatably connected to the carburetor housing 1, and a throttle connecting ring 22 is fixedly connected to the end of the throttle connecting shaft 21.

[0024] In this embodiment, a fixing seat 4 is fixedly connected to the outer wall of the carburetor housing 1, and a fixing bracket 5 is fixedly connected to the upper surface of the fixing seat 4.

[0025] In this embodiment, an opening limiting mechanism 6 is included. The opening limiting mechanism 6 includes a fixed plate 61 fixedly connected to the top of the fixed frame 5. An arc-shaped mounting seat 62 is fixedly connected to the fixed plate 61. The arc-shaped mounting seat 62 has a guide groove 621 and a connecting rod 63 is slidably connected through the guide groove 621. A positioning piece 631 larger than the width of the guide groove 621 is fixedly sleeved on the connecting rod 63. The side of the positioning piece 631 that is in contact with the arc-shaped mounting seat 62 has the same curvature as the arc-shaped mounting seat 62. A stop block 64 is fixedly connected to the top of the connecting rod 63. A stop rod 69 that can be blocked by the stop block 64 is fixedly connected to the outer wall of the throttle connecting shaft 21. By blocking the stop rod 69 by the stop block 64, the throttle connecting shaft 21 can only rotate within a small range, thereby limiting the opening of the throttle 2 and avoiding accidents caused by accidental operation of the throttle leading to excessive speed (such as accidents caused by operating the throttle as a brake). The outer wall of the fixed plate 61 is provided with a first guide groove 611 and a second guide groove 612. A guide slider matching the first guide groove 611 is fixedly connected to the side of the strip plate 65 facing the fixed plate 61. One end of the strip plate 65 is rotatably connected to the connecting section 66, and the other end of the connecting section 66 is rotatably connected to the bottom end of the connecting rod 63 through a rotating shaft, and the end of the rotating shaft can slide along the second guide groove 612. A first cylinder 67 is fixedly connected to the fixed frame 5, and a connecting vertical shaft 68 is fixedly connected to the top of the piston rod of the first cylinder 67. The strip plate 65 is provided with a strip groove 651 for the connecting vertical shaft 68 to slide horizontally. A pair of limiting pieces 681 with a diameter larger than the width of the strip groove 651 are fixedly sleeved on the connecting vertical shaft 68, and the two limiting pieces 681 are located on the upper and lower sides of the strip groove 651, respectively. When the piston rod of the first cylinder 67 extends or retracts, it can drive the strip plate 65 to move upward and horizontally at the same time, thereby driving the connecting rod 63 to move along the guide groove 621, so that the stop block 64 is kept at different heights. The stop blocks 64 at different heights will restrict the throttle 2 from rotating within different vertical openings.

[0026] In this embodiment, a mode switching mechanism 7 is included. The mode switching mechanism 7 includes a second cylinder 71 fixed to the upper surface of the fixed base 4. A connecting sleeve 72 is fixedly connected to the piston rod end of the second cylinder 71. A connecting shaft 73 is vertically movably sleeved at the top of the connecting sleeve 72. A connecting ring 74 is fixedly connected to the top of the connecting shaft 73. The connecting ring 74 is movably sleeved with the throttle connecting ring 22, and the top of the connecting ring 74 is fixedly connected to the bottom end of the pull rod 3. By extending and retracting the piston rod of the second cylinder 71, the connecting ring 74 can be driven to slide to different positions of the throttle connecting ring 22, thereby driving the throttle 2 to rotate in different directions when the connecting ring 74 moves upward. Combined with the opening degree limiting mechanism 6, two throttle control modes can be realized. When the throttle 2 rotates counterclockwise, the opening degree is limited by the opening degree limiting mechanism 6. When the throttle 2 rotates clockwise, it can be opened to the maximum angle (the throttle 2 rotates 90° from a horizontal state to a vertical state), that is, the throttle is fully opened.

[0027] The working principle of this embodiment is as follows: through the design of the opening limit mechanism 6, the opening of the throttle 2 can be limited, mainly to limit its maximum opening value, so as to avoid accidental operation that increases the speed too much and causes an accident. Furthermore, through the sliding design between the stop block 64 and the arc-shaped mounting base 62, the upper limit of the maximum opening can be adjusted by adjusting the position of the stop block 64, allowing the user to select different gears according to actual needs and personal habits.

[0028] The mode switching mechanism 7 can drive the throttle 2 to rotate in different directions. Combined with the opening limit mechanism 6, two throttle control modes can be realized. When the throttle 2 rotates counterclockwise, the opening is limited by the opening limit mechanism 6, which is suitable for beginners or places that require low-speed operation. When the throttle 2 rotates clockwise, it can be opened to the maximum angle, that is, the throttle is fully opened. The throttle control is completely manual, which is suitable for experienced drivers or places that require high-speed operation.

[0029] For details, please refer to Figure 1 When the throttle is activated, the external linkage structure moves the lever 3 upward, which in turn pulls one end of the throttle connecting ring 22 upward, causing it to rotate counterclockwise. This, in turn, causes the throttle 2 to rotate counterclockwise via the throttle connecting shaft 21. The larger the rotation angle, the greater the throttle opening. The rotation of the throttle connecting shaft 21 also causes the shift lever 69 to rotate. Rotation stops when the shift lever 69 contacts the stop block 64. At this point, even if the throttle is accidentally increased (e.g., the brake is used as the accelerator), the throttle opening will not continue to increase, reducing the risk of accidents. This throttle control mode is suitable for beginners or applications requiring low-speed operation.

[0030] refer to Figure 2When the piston rod of the second cylinder 71 retracts, it moves the connecting ring 74 to the other end of the throttle connecting ring 22. As the lever 3 moves upward, it pulls the other end of the throttle connecting ring 22 upward, causing it to rotate clockwise. This, in turn, causes the throttle 2 to rotate clockwise upward via the throttle connecting shaft 21. Since there is no opening limit mechanism 6 on the other side of the throttle connecting shaft 21, it can rotate 90° without obstruction, allowing the throttle 2 to fully open. This throttle control mode is suitable for experienced drivers or applications requiring high-speed operation.

[0031] Example 2

[0032] like Figure 1-4 As shown, the carburetor for automatically controlling the engine throttle opening proposed in this disclosure, compared with Embodiment 1, further includes: a filter mechanism 8 for filtering the air entering the carburetor partial housing 1. The filter mechanism 8 includes a housing 81 fixedly connected to the outer wall of the carburetor partial housing 1, a filter element 82 installed in the housing 81, and a scraper 83 fixedly connected to the housing 81 for removing dust from the filter element 82.

[0033] In this embodiment, an automatic dust removal mechanism 9 is included. The automatic dust removal mechanism 9 includes a bearing seat 91 fixedly connected to the outer wall of the housing 81. A horizontal axle is rotatably connected to the bottom end of the bearing seat 91. A friction-enhancing wheel 92 and a ratchet 93 are fixedly connected to both ends of the horizontal axle, respectively. The housing 81 has a slot for a portion of the wheel surface of the friction-enhancing wheel 92 to extend into, so that the friction-enhancing wheel 92 is tangent to the wheel surface of the filter element 82. Multiple pawl assemblies are elastically connected to the disc surface of the ratchet 93. The pawl assembly includes a fixing block 931 fixedly connected to the disc surface of the ratchet 93, a pawl 932 rotatably connected to the fixing block 931, and a leaf spring 933 with one end fixedly connected to the fixing block 931 and the other end movably abutting against the pawl 932. A push rod 94 that can extend between adjacent pawl assemblies is fixedly connected to the outer wall of the throttle connecting shaft 21. When the throttle 2 is rotated, the push rod 94 is driven to rotate through the throttle connecting shaft 21. Then, the push rod 94 and the ratchet assembly are driven to rotate through the contact between the push rod 94 and the ratchet wheel 93 and the friction wheel 92. The friction wheel 92 then drives the filter element 82 to rotate, so that the filter element 82 and the scraper 83 will move relative to each other to achieve the purpose of scraping and cleaning dust.

[0034] The working principle of this embodiment is as follows: the air entering the carburetor housing 1 is filtered by the filter mechanism 8, and the filter element 82 is rotated by the opening and closing of the throttle 2 combined with the automatic dust removal mechanism 9, so that the filter element 82 and the scraper 83 make relative movement, so as to achieve the purpose of scraping and cleaning dust.

[0035] Specifically, when the throttle connecting shaft 21 rotates, it will drive the push rod 94 to rotate together. Since the throttle connecting shaft 21 needs to be reset regardless of whether it rotates clockwise or counterclockwise (i.e., regardless of the throttle control mode in Embodiment 1), there will be a counterclockwise rotation action that contacts the pawl assembly of the ratchet 93, thereby driving the ratchet 93 and the friction wheel 92 to rotate. The wheel surface of the friction wheel 92 is tangent to the filter element 82, and the resulting friction force drives the filter element 82 to rotate together, so that the filter element 82 and the scraper 83 produce relative movement, so as to achieve the purpose of scraping and cleaning the filter element 82 by the scraper 83.

[0036] The above specific embodiments are merely several optional embodiments of this disclosure. Based on the technical solutions of this disclosure and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A carburetor for automatically controlling the throttle opening of an engine, comprising a carburetor housing (1), a throttle (2) rotatably connected within the carburetor housing (1), and a lever (3) connected to an external throttle operating lever via a linkage structure, wherein the throttle (2) is fixedly connected to a throttle connecting shaft (21); characterized in that, Also includes: The opening limit mechanism (6) includes a stop bar (69) fixed to the outer wall of the throttle connecting shaft (21), an arc-shaped mounting seat (62) provided on the outer wall of the carburetor housing (1), and a stop block (64) slidably connected to the arc-shaped mounting seat (62). The stop block (64) blocks the stop bar (69) to limit the opening size of the throttle (2). The mode switching mechanism (7) includes a horizontally movable connecting ring (74), and a throttle connecting ring (22) is fixedly connected to the end of the throttle connecting shaft (21). The throttle connecting ring (22) is slidably sleeved with the connecting ring (74). By sliding the connecting ring (74) to different positions of the throttle connecting ring (22), the throttle (2) can be rotated in different directions to switch the opening size.

2. The carburetor for automatically controlling engine throttle opening according to claim 1, characterized in that, A fixing seat (4) is fixedly connected to the outer wall of the carburetor housing (1), and a fixing bracket (5) is fixedly connected to the upper surface of the fixing seat (4).

3. The carburetor for automatically controlling engine throttle opening according to claim 2, characterized in that, The opening limit mechanism (6) includes a fixed plate (61) fixedly connected to the top of the fixed frame (5), and the arc-shaped mounting base (62) is fixedly connected to the fixed plate (61).

4. The carburetor for automatically controlling engine throttle opening according to claim 3, characterized in that, The arc-shaped mounting base (62) has a guide groove (621) and a connecting rod (63) is slidably connected through the guide groove (621). The connecting rod (63) is fixedly sleeved with a positioning piece (631) that is larger than the width of the guide groove (621). A stop block (64) is fixedly connected to the top of the connecting rod (63). The outer wall of the fixing plate (61) has a first guide groove (611) and a second guide groove (612). The outer wall of the fixed plate (61) is slidably connected to a strip plate (65) through the first guide groove (611). The strip plate (65) is rotatably connected to one end of the connecting section (66), and the other end of the connecting section (66) is rotatably connected to the bottom end of the connecting rod (63) through a rotating shaft. The end of the rotating shaft can slide along the second guide groove (612).

5. The carburetor for automatically controlling engine throttle opening according to claim 4, characterized in that, The fixed frame (5) is fixedly connected to the first cylinder (67), and the piston rod of the first cylinder (67) is fixedly connected to the connecting vertical shaft (68). The strip plate (65) is provided with a strip groove (651) for the connecting vertical shaft (68) to slide horizontally.

6. The carburetor for automatically controlling engine throttle opening according to claim 5, characterized in that, The connecting vertical shaft (68) is fixedly sleeved with a pair of limiting pieces (681) with a diameter greater than the width of the strip groove (651), and the two limiting pieces (681) are located on the upper and lower sides of the strip groove (651) respectively.

7. The carburetor for automatically controlling engine throttle opening according to claim 6, characterized in that, The mode switching mechanism (7) includes a second cylinder (71) fixed on the upper surface of the fixed base (4). The piston rod end of the second cylinder (71) is fixedly connected to a connecting bushing (72). The top end of the connecting bushing (72) is vertically movably sleeved with a connecting shaft (73). The top end of the connecting shaft (73) is fixedly connected to a connecting ring (74), and the top end of the connecting ring (74) is fixedly connected to the bottom end of the pull rod (3).

8. The carburetor for automatically controlling engine throttle opening according to claim 7, characterized in that, The filter mechanism (8) includes a filter mechanism (8) for filtering air entering the carburetor housing (1). The filter mechanism (8) includes a housing (81) fixedly connected to the outer wall of the carburetor housing (1), a filter element (82) installed in the housing (81), and a scraper (83) fixedly connected to the housing (81) for removing dust from the filter element (82).

9. The carburetor for automatically controlling engine throttle opening according to claim 8, characterized in that, It includes an automatic dust removal mechanism (9), which drives the filter element (82) to rotate through the rotation of the throttle connecting shaft (21).

10. The carburetor for automatically controlling engine throttle opening according to claim 9, characterized in that, The automatic dust removal mechanism (9) includes a bearing seat (91) fixedly connected to the outer shell (81). A horizontal wheel axle is rotatably connected to the bottom end of the bearing seat (91). A friction-enhancing wheel (92) and a ratchet (93) are fixedly connected to both ends of the horizontal wheel axle, respectively. The friction-enhancing wheel (92) is tangent to the filter element (82). A push rod (94) is fixedly connected to the outer wall of the throttle connecting shaft (21). Multiple pawl assemblies are elastically connected to the disc surface of the ratchet (93). The ratchet (93) and the friction-enhancing wheel (92) are rotated by the contact between the push rod (94) and the pawl assembly.

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