A plunger assembly for a carburetor

Abstract

The utility model relates to the technical field of carburetors, and specifically to a plunger assembly of a carburetors, comprising a plunger, an oil needle and a connecting module; a groove is arranged on the plunger, a through hole is arranged at the bottom of the groove for the oil needle to pass through, and a limit plate extending inwardly is arranged on the inner side wall of the groove; the connecting module comprises a card core and a spring, the spring is sleeved on the oil needle and abuts against the bottom of the card core, a protrusion group is arranged on the outer periphery of the card core, the protrusion group comprises a plurality of protrusions extending outwardly and distributed in a circumferential array, and a clamping portion is arranged on the upper surface of the protrusion; a slot hole is arranged at the center of the limit plate for the spring to pass through, and a plurality of notches corresponding to the protrusions are arranged on the inner side wall of the slot hole; a clamping groove clamped with the clamping portion is also arranged on the side of the limit plate facing the through hole; the utility model is simpler to install through the arrangement of the card core and the spring, and only needs to be rotated for alignment after insertion to avoid contact wear and improve assembly efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of carburetors, in particular to a plunger assembly of a carburetors. Background Art

[0002] A carburetor is a mechanical device that mixes a certain proportion of gasoline and air under the vacuum generated by the engine. As a precision mechanical device, the carburetor uses the kinetic energy of the inhaled air flow to atomize the gasoline for the normal operation of the machine. The carburetor will automatically proportion the corresponding concentration according to the different working state requirements of the engine and output the corresponding amount of mixed gas. In order to make the mixed gas mixed more evenly, the carburetor also has the effect of atomizing the fuel for the normal operation of the machine. In the existing carburetor, the oil needle is installed on the plunger through a pressure ring and is coaxial with it, and three fixed points are required to achieve the stability of the pressure ring. During operation, due to vibration and changes in the throttle, the oil needle and the pressure ring will move relative to each other, resulting in relative wear and scratches. Moreover, after the wear and scratches occur, the matching gap becomes larger, which further aggravates the wear and scratches during use, and the accumulation leads to the failure of the plunger. Therefore, a plunger assembly that can replace the pressure ring structure is needed. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is to provide a plunger assembly of a carburetor which can replace the fixing of a pressure ring and thus reduce wear.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A plunger assembly of a carburetor, comprising a plunger, an oil needle and a connecting module;

[0006] The plunger is provided with a groove, the bottom of the groove is provided with a through hole for the oil needle to pass through, and the inner side wall of the groove is provided with a limit plate extending inward; the oil needle includes a needle head, and the needle head is arranged in the groove between the limit plate and the through hole;

[0007] The connecting module comprises a card core and a spring, wherein the spring is sleeved on the needle head and abuts against the bottom of the card core, a protrusion group is arranged on the outer circumference of the card core, the protrusion group comprises a plurality of protrusions extending outward and distributed in a circumferential array, and a clamping portion is arranged on the upper surface of the protrusion;

[0008] A slot hole for the spring to pass through is provided at the center of the limit plate, and a through group corresponding to the protrusion group is provided on the inner side wall of the slot hole, and the through group includes a plurality of notches corresponding to the protrusions;

[0009] A clamping groove which is clamped with the clamping part is also arranged on a surface of the limiting plate which faces the through hole.

[0010] Preferably, a mounting groove is provided at the center of the upper surface of the card core.

[0011] Preferably, the mounting groove is one of a slot, a cross slot, a hexagonal slot or a plum blossom slot.

[0012] Preferably, a flexible retaining ring is provided between the spring and the needle.

[0013] Preferably, there are two protrusions, and the included angle between the two protrusions is 180°.

[0014] Preferably, there are three protrusions, and the included angle between the three protrusions is 120°.

[0015] Preferably, there are four protrusions, and the included angle between the three protrusions is 90°.

[0016] Preferably, a blind groove is provided on a side of the card core facing the spring, and the spring is arranged in the blind groove.

[0017] The beneficial effects of the utility model are as follows: through the arrangement of the card core and the spring, the spring can give the card core an upward force. During installation, the protrusions of the protruding group are inserted into the gap between the limit plate and the through hole after corresponding to the notch, and then the card core is rotated to align the engaging part with the engaging groove and then the card core is released. The card core is reset under the action of the spring to send the engaging part into the engaging groove to achieve matching; and by adopting the spring, there is no direct contact between the card core and the oil needle, thereby reducing or avoiding relative wear and ensuring the service life of the product; and through the arrangement of the card core, installation is simpler, and it only needs to be rotated and aligned after insertion, without the need for the retaining ring in the prior art to be fixed by simultaneously engaging more than three fixing points, thereby improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a structural schematic diagram of a plunger assembly of a carburetor according to a specific embodiment of the utility model;

[0019] Figure 2 Shown is a cross-sectional view of a plunger assembly of a carburetor according to a specific embodiment of the utility model;

[0020] Figure 3 The figure is a top view of a plunger assembly of a carburetor according to a specific embodiment of the utility model;

[0021] Explanation of reference numerals: 1. plunger; 11. groove; 12. limit plate; 13. notch; 2. oil needle; 21. needle head; 3. connection module; 31. card core; 32. spring; 33. protrusion; 34. engaging part; 35. mounting groove; 36. flexible retaining ring; 37. blind groove. DETAILED DESCRIPTION

[0022] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0023] Please refer to Figures 1 to 3 As shown, a plunger 1 assembly of a carburetor of the utility model comprises a plunger 1, an oil needle 2 and a connecting module 3;

[0024] The plunger 1 is provided with a groove 11, a through hole for the oil needle 2 to pass through is provided at the bottom of the groove 11, and a limit plate 12 extending inward is provided on the inner side wall of the groove 11; the oil needle 2 includes a needle head 21, and the needle head 21 is arranged in the groove 11 between the limit plate 12 and the through hole;

[0025] The connecting module 3 includes a card core 31 and a spring 32. The spring 32 is sleeved on the needle 21 and abuts against the bottom of the card core 31. A protrusion group is arranged on the outer circumference of the card core 31. The protrusion group includes a plurality of protrusions 33 extending outward and distributed in a circumferential array. A clamping portion 34 is arranged on the upper surface of the protrusion 33.

[0026] A slot hole for the spring 32 to pass through is provided at the center of the limit plate 12, and a through group corresponding to the protrusion group is provided on the inner side wall of the slot hole, and the through group includes a plurality of notches 13 corresponding to the protrusions 33;

[0027] The limiting plate 12 is also provided with a snap-fitting groove on a surface facing the through hole, which is snap-fitted with the snap-fitting portion 34 .

[0028] From the above description, it can be known that through the arrangement of the card core 31 and the spring 32, the spring 32 can give the card core 31 an upward force. During installation, the protrusion 33 of the protrusion group is placed in the gap between the limit plate 12 and the through hole by corresponding the notch 13, and then the card core 31 is rotated to align the engaging portion 34 with the engaging groove and then the card core 31 is released. The card core 31 is reset under the action of the spring 32 to send the engaging portion 34 into the engaging groove to achieve matching; and by adopting the spring 32, the card core 31 has no direct contact with the oil needle 2, thereby reducing or avoiding relative wear and ensuring the service life of the product; and through the arrangement of the card core 31, the installation is simpler, and it only needs to be rotated and aligned after insertion, without the need for the retaining ring in the prior art to be fixed at more than three fixed points at the same time, thereby improving the assembly efficiency.

[0029] Furthermore, a mounting groove 35 is provided at the center of the upper surface of the card core 31 .

[0030] It can be known from the above description that the installation slot 35 can facilitate the installation of the card core 31 .

[0031] Furthermore, the mounting groove 35 is one of a slot, a cross slot, a hexagonal slot or a plum blossom slot.

[0032] From the above description, it can be seen that by adopting a slot, a cross slot, a hexagonal slot or a plum blossom slot, it can be adapted to various existing installation tools to improve efficiency.

[0033] Furthermore, a flexible retaining ring 36 is provided between the spring 32 and the needle 21 .

[0034] It can be seen from the above description that the flexible retaining ring 36 can avoid a rigid collision between the needle 21 and the spring 32 .

[0035] Furthermore, there are two protrusions 33, and the included angle between the two protrusions 33 is 180°.

[0036] Furthermore, there are three protrusions 33, and the included angle between the three protrusions 33 is 120°.

[0037] Furthermore, there are four protrusions 33, and the included angle between the three protrusions 33 is 90°.

[0038] Furthermore, a blind groove 37 is provided on a side of the card core 31 facing the spring 32 , and the spring 32 is disposed in the blind groove 37 .

[0039] It can be seen from the above description that, by providing the blind groove 37 , the spring 32 can be limited, thereby preventing the spring 32 from being lateral displaced and worn.

[0040] Embodiment 1

[0041] A plunger 1 assembly of a carburetor, comprising a plunger 1, an oil needle 2 and a connecting module 3;

[0042] The plunger 1 is provided with a groove 11, a through hole for the oil needle 2 to pass through is provided at the bottom of the groove 11, and a limit plate 12 extending inward is provided on the inner side wall of the groove 11; the oil needle 2 includes a needle head 21, and the needle head 21 is arranged in the groove 11 between the limit plate 12 and the through hole;

[0043] The connecting module 3 includes a card core 31 and a spring 32. The spring 32 is sleeved on the needle 21 and abuts against the bottom of the card core 31. A protrusion group is arranged on the outer circumference of the card core 31. The protrusion group includes a plurality of protrusions 33 extending outward and distributed in a circumferential array. A clamping portion 34 is arranged on the upper surface of the protrusion 33.

[0044] A slot hole for the spring 32 to pass through is provided at the center of the limit plate 12, and a through group corresponding to the protrusion group is provided on the inner side wall of the slot hole, and the through group includes a plurality of notches 13 corresponding to the protrusions 33;

[0045] The limiting plate 12 is also provided with a snap-fitting groove on a surface facing the through hole, which is snap-fitted with the snap-fitting portion 34 .

[0046] A mounting groove 35 is disposed at the center of the upper surface of the card core 31 .

[0047] The mounting groove 35 is a hexagonal groove.

[0048] A flexible retaining ring 36 is provided between the spring 32 and the needle 21 .

[0049] There are two protrusions 33 , and the included angle between the two protrusions 33 is 180°.

[0050] A blind groove 37 is disposed on a side of the clamp core 31 facing the spring 32 , and the spring 32 is disposed in the blind groove 37 .

[0051] Embodiment 2

[0052] A plunger 1 assembly of a carburetor, comprising a plunger 1, an oil needle 2 and a connecting module 3;

[0053] The plunger 1 is provided with a groove 11, a through hole for the oil needle 2 to pass through is provided at the bottom of the groove 11, and a limit plate 12 extending inward is provided on the inner side wall of the groove 11; the oil needle 2 includes a needle head 21, and the needle head 21 is arranged in the groove 11 between the limit plate 12 and the through hole;

[0054] The connecting module 3 includes a card core 31 and a spring 32. The spring 32 is sleeved on the needle 21 and abuts against the bottom of the card core 31. A protrusion group is arranged on the outer circumference of the card core 31. The protrusion group includes a plurality of protrusions 33 extending outward and distributed in a circumferential array. A clamping portion 34 is arranged on the upper surface of the protrusion 33.

[0055] A slot hole for the spring 32 to pass through is provided at the center of the limit plate 12, and a through group corresponding to the protrusion group is provided on the inner side wall of the slot hole, and the through group includes a plurality of notches 13 corresponding to the protrusions 33;

[0056] The limiting plate 12 is also provided with a snap-fitting groove on a surface facing the through hole, which is snap-fitted with the snap-fitting portion 34 .

[0057] A mounting groove 35 is disposed at the center of the upper surface of the card core 31 .

[0058] The mounting groove 35 is a straight groove.

[0059] A flexible retaining ring 36 is provided between the spring 32 and the needle 21 .

[0060] There are three protrusions 33 , and the included angle of the three protrusions 33 is 120°.

[0061] Embodiment 3

[0062] A plunger 1 assembly of a carburetor, comprising a plunger 1, an oil needle 2 and a connecting module 3;

[0063] The plunger 1 is provided with a groove 11, a through hole for the oil needle 2 to pass through is provided at the bottom of the groove 11, and a limit plate 12 extending inward is provided on the inner side wall of the groove 11; the oil needle 2 includes a needle head 21, and the needle head 21 is arranged in the groove 11 between the limit plate 12 and the through hole;

[0064] The connecting module 3 includes a card core 31 and a spring 32. The spring 32 is sleeved on the needle 21 and abuts against the bottom of the card core 31. A protrusion group is arranged on the outer circumference of the card core 31. The protrusion group includes a plurality of protrusions 33 extending outward and distributed in a circumferential array. A clamping portion 34 is arranged on the upper surface of the protrusion 33.

[0065] A slot hole for the spring 32 to pass through is provided at the center of the limit plate 12, and a through group corresponding to the protrusion group is provided on the inner side wall of the slot hole, and the through group includes a plurality of notches 13 corresponding to the protrusions 33;

[0066] The limiting plate 12 is also provided with a snap-fitting groove on a surface facing the through hole, which is snap-fitted with the snap-fitting portion 34 .

[0067] A mounting groove 35 is disposed at the center of the upper surface of the card core 31 .

[0068] The mounting groove 35 is a cross groove.

[0069] A flexible retaining ring 36 is provided between the spring 32 and the needle 21 .

[0070] There are four protrusions 33 , and the included angle between the three protrusions 33 is 90°.

[0071] A blind groove 37 is disposed on a side of the clamp core 31 facing the spring 32 , and the spring 32 is disposed in the blind groove 37 .

[0072] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A plunger assembly for a carburetor, characterized in that: Including plunger, oil needle and connection module; The plunger is provided with a groove, the bottom of the groove is provided with a through hole for the oil needle to pass through, and the inner side wall of the groove is provided with a limit plate extending inward; the oil needle includes a needle head, and the needle head is arranged in the groove between the limit plate and the through hole; The connecting module comprises a card core and a spring, wherein the spring is sleeved on the needle head and abuts against the bottom of the card core, a protrusion group is arranged on the outer circumference of the card core, the protrusion group comprises a plurality of protrusions extending outward and distributed in a circumferential array, and a clamping portion is arranged on the upper surface of the protrusion; A slot hole for the spring to pass through is provided at the center of the limit plate, and a through group corresponding to the protrusion group is provided on the inner side wall of the slot hole, and the through group includes a plurality of notches corresponding to the protrusions; A clamping groove which is clamped with the clamping part is also arranged on a surface of the limiting plate which faces the through hole.

2. The plunger assembly of the carburetor according to claim 1, characterized in that: A mounting groove is arranged at the center of the upper surface of the card core.

3. The plunger assembly of the carburetor according to claim 2, characterized in that: The mounting groove is one of a slot, a cross slot, a hexagonal slot or a plum blossom slot.

4. The plunger assembly of the carburetor according to claim 2, characterized in that: A flexible retaining ring is arranged between the spring and the needle.

5. The plunger assembly of the carburetor according to claim 1, characterized in that: There are two protrusions, and the included angle between the two protrusions is 180°.

6. The plunger assembly of the carburetor according to claim 1, characterized in that: There are three protrusions, and the included angle of the three protrusions is 120°.

7. The plunger assembly of the carburetor according to claim 1, characterized in that: There are four protrusions, and the included angle of the three protrusions is 90°.

8. The plunger assembly of the carburetor according to claim 1, characterized in that: A blind groove is arranged on one side of the card core facing the spring, and the spring is arranged in the blind groove.

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