Carburetor capable of improving low-speed oil inlet effect

Abstract

The utility model relates to the technical field of carburetors, in particular to a carburetor capable of improving low-speed oil inlet effect, which comprises a body, a plunger and an oil needle. The containing groove and the oil inlet hole are located in the first center shaft. A groove is formed in the plunger, a limiting groove is formed in the bottom of the groove, the bottom face of the limiting groove is an inclined face, and a through hole penetrating through the plunger is formed in the inclined face. The oil needle comprises a needle head, a needle body and a horizontal sheet; the needle head is connected with the needle body through the horizontal sheet; when the oil needle is matched with the plunger, the horizontal piece is attached to the inclined face, so that an included angle is formed between the center axis of the oil needle and the first center axis. The included angle is formed between the center shaft of the oil needle and the first center shaft, so that the oil needle can be attached to the inner side wall of the oil inlet hole when the oil needle is located in the oil inlet hole, the contact area of gasoline is reduced, oil passing resistance is reduced, the low-pressure oil inlet effect at a low speed is improved, and the low-speed oil inlet requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of carburetors, in particular to a carburetors capable of improving the low-speed oil feeding effect. Background Art

[0002] A carburetor is a mechanical device that mixes a certain proportion of gasoline and air under the vacuum created 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 and output the corresponding amount of mixed gas according to the different working state requirements of the engine. 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 and is coaxially arranged with it, and is also coaxially arranged with the oil inlet hole. When the gasoline passes through the oil inlet hole, the oil will contact the inner wall of the oil inlet hole and the outer wall of the oil needle, thereby generating friction resistance, resulting in poor oil intake capacity at low speeds. 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 carburetor that improves the low-speed oil intake effect.

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

[0005] A carburetor for improving the low-speed oil inlet effect comprises a body, a plunger and an oil needle, wherein the body is provided with a receiving groove and an oil inlet hole; the receiving groove and the oil inlet hole are located on a first central axis;

[0006] The plunger is provided with a groove, the bottom of the groove is provided with a limiting groove, the bottom surface of the limiting groove is an inclined surface, and the inclined surface is provided with a through hole penetrating the plunger;

[0007] The oil needle comprises a needle head, a needle body and a horizontal sheet, wherein the needle head is connected to the needle body through the horizontal sheet; the needle head and the horizontal sheet are arranged in the groove;

[0008] When the oil needle is separated from the plunger, the horizontal sheet is perpendicular to the first center axis; when the oil needle is matched with the plunger, the horizontal sheet fits with the inclined surface so that the center axis of the oil needle has an angle with the first center axis; the needle body is inserted into the oil inlet hole through the through hole.

[0009] Preferably, the angle between the inclined surface and the horizontal sheet is 1°-5°.

[0010] Preferably, the angle between the inclined surface and the horizontal sheet is 3°.

[0011] Preferably, the angle between the inclined surface and the horizontal sheet is 2.5°.

[0012] Preferably, a self-lubricating coating is provided on the inner wall of the oil inlet hole and the outer wall of the needle body respectively.

[0013] Preferably, a plurality of raised limiting portions are provided on the side wall of the groove.

[0014] Preferably, the edge of the limiting portion is rounded.

[0015] Preferably, a weight-reducing hole is provided on the plunger on the higher side of the inclined surface.

[0016] The beneficial effect of the utility model is that: the central axis of the oil needle and the first central axis have an included angle, so that the oil needle will fit with the inner wall of the oil inlet hole when it is in the oil inlet hole. Due to the existence of the fitting surface, the contact area between the inner wall of the oil inlet hole and the outer surface of the oil needle when gasoline passes through the oil inlet hole is reduced, thereby reducing the resistance to the passage of oil, improving the low-pressure oil intake effect at low speed, and meeting the low-speed oil intake requirements; the utility model has a simple structure and a sophisticated design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure shows a cross-sectional view of a plunger of a carburetor for improving the low-speed oil inlet effect according to a specific embodiment of the utility model;

[0018] Figure 2 The figure is a top view of a plunger of a carburetor for improving the low-speed oil inlet effect according to a specific embodiment of the utility model;

[0019] Explanation of reference numerals: 1. plunger; 11. groove; 12. limit groove; 13. inclined surface; 14. through hole; 15. limit portion; 16. weight-reducing hole. DETAILED DESCRIPTION

[0020] 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.

[0021] Please refer to Figure 1 to Figure 2 As shown, a carburetor for improving the low-speed oil inlet effect of the utility model comprises a body, a plunger 1 and an oil needle, wherein the body is provided with a receiving groove and an oil inlet hole; the receiving groove and the oil inlet hole are located on a first central axis;

[0022] The plunger 1 is provided with a groove 11, a limiting groove 12 is provided at the bottom of the groove 11, the bottom surface of the limiting groove 12 is an inclined surface 13, and a through hole 14 penetrating the plunger 1 is provided on the inclined surface 13;

[0023] The oil needle comprises a needle head, a needle body and a horizontal sheet, wherein the needle head is connected to the needle body through the horizontal sheet;

[0024] When the oil needle is separated from the plunger 1, the horizontal sheet is perpendicular to the first center axis; the needle head and the horizontal sheet are arranged in the groove 11; when the oil needle is matched with the plunger 1, the horizontal sheet fits with the inclined surface 13 so that the center axis of the oil needle has an angle with the first center axis; the needle body passes through the through hole 14 and is inserted into the oil inlet hole.

[0025] From the above description, it can be seen that the central axis of the oil needle and the first central axis have an angle, so that the oil needle will fit with the inner wall of the oil inlet hole when it is in the oil inlet hole. Due to the existence of the fitting surface, the contact area between the inner wall of the oil inlet hole and the outer surface of the oil needle when gasoline passes through the oil inlet hole is reduced, thereby reducing the resistance to the passage of oil, improving the low-pressure oil intake effect at low speed, and meeting the low-speed oil intake requirements; the structure is simple and the design is exquisite.

[0026] Furthermore, the angle between the inclined surface 13 and the horizontal piece is 1°-5°.

[0027] Furthermore, the angle between the inclined surface 13 and the horizontal plate is 3°.

[0028] From the above description, it can be seen that the angle between the inclined surface 13 and the horizontal plate is 3°, which can balance the friction between the needle body and the oil inlet hole and the friction when gasoline passes through the oil inlet hole. It is an empirical value. If the angle is too large, the friction between the needle body and the inner wall of the oil inlet hole will be too large.

[0029] Furthermore, a self-lubricating coating is provided on the inner wall of the oil inlet hole and the outer wall of the needle body respectively.

[0030] From the above description, it can be seen that the self-lubricating coating can reduce the friction resistance with gasoline and improve the oil intake effect; at the same time, it can also reduce the friction coefficient and ensure a low friction coefficient when the needle body and the oil inlet hole are in contact.

[0031] Furthermore, a plurality of raised limiting portions 15 are provided on the side wall of the groove 11 .

[0032] Furthermore, the edge of the limiting portion 15 is rounded.

[0033] Furthermore, a weight-reducing hole 16 is provided on the plunger 1 on the higher side of the inclined surface 13 .

[0034] From the above description, it can be seen that through the setting of the weight-reducing hole 16, the center of gravity of the oil needle and the plunger 1 is shifted due to the inclined setting, and shifted to the higher side of the inclined surface 13. Through the weight-reducing hole 16, the center of gravity can be balanced to avoid wear between the plunger 1 and the carburetor.

[0035] Embodiment 1

[0036] A carburetor for improving the low-speed oil inlet effect, comprising a body, a plunger 1 and an oil needle, wherein the body is provided with a receiving groove and an oil inlet hole; the receiving groove and the oil inlet hole are located on a first central axis;

[0037] The plunger 1 is provided with a groove 11, a limiting groove 12 is provided at the bottom of the groove 11, the bottom surface of the limiting groove 12 is an inclined surface 13, and a through hole 14 penetrating the plunger 1 is provided on the inclined surface 13;

[0038] The oil needle comprises a needle head, a needle body and a horizontal sheet, wherein the needle head is connected to the needle body through the horizontal sheet; the needle head and the horizontal sheet are arranged in the groove 11;

[0039] When the oil needle is separated from the plunger 1, the horizontal sheet is perpendicular to the first center axis; when the oil needle is matched with the plunger 1, the horizontal sheet fits with the inclined surface 13 so that the center axis of the oil needle has an angle with the first center axis; the needle body passes through the through hole 14 and is inserted into the oil inlet hole.

[0040] The included angle between the inclined surface 13 and the horizontal plate is 3°.

[0041] The inner wall of the oil inlet hole and the outer wall of the needle body are respectively provided with self-lubricating coatings.

[0042] A plurality of raised limiting portions 15 are arranged on the side wall of the groove 11 .

[0043] The edge of the limiting portion 15 is rounded.

[0044] A weight-reducing hole 16 is provided on the plunger 1 at the higher side of the inclined surface 13 .

[0045] Embodiment 2

[0046] A carburetor for improving the low-speed oil inlet effect, comprising a body, a plunger 1 and an oil needle, wherein the body is provided with a receiving groove and an oil inlet hole; the receiving groove and the oil inlet hole are located on a first central axis;

[0047] The plunger 1 is provided with a groove 11, a limiting groove 12 is provided at the bottom of the groove 11, the bottom surface of the limiting groove 12 is an inclined surface 13, and a through hole 14 penetrating the plunger 1 is provided on the inclined surface 13;

[0048] The oil needle comprises a needle head, a needle body and a horizontal sheet, wherein the needle head is connected to the needle body through the horizontal sheet; the needle head and the horizontal sheet are arranged in the groove 11;

[0049] When the oil needle is separated from the plunger 1, the horizontal sheet is perpendicular to the first center axis; when the oil needle is matched with the plunger 1, the horizontal sheet fits with the inclined surface 13 so that the center axis of the oil needle has an angle with the first center axis; the needle body passes through the through hole 14 and is inserted into the oil inlet hole.

[0050] The angle between the inclined surface 13 and the horizontal plate is 2.5°.

[0051] The inner wall of the oil inlet hole and the outer wall of the needle body are respectively provided with self-lubricating coatings.

[0052] A plurality of raised limiting portions 15 are arranged on the side wall of the groove 11 .

[0053] 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 carburetor for improving the low-speed oil intake effect, characterized in that: It comprises a body, a plunger and an oil needle, wherein the body is provided with a receiving groove and an oil inlet hole; the receiving groove and the oil inlet hole are located on the first central axis; The plunger is provided with a groove, the bottom of the groove is provided with a limiting groove, the bottom surface of the limiting groove is an inclined surface, and the inclined surface is provided with a through hole penetrating the plunger; The oil needle comprises a needle head, a needle body and a horizontal sheet, wherein the needle head is connected to the needle body through the horizontal sheet; the needle head and the horizontal sheet are arranged in the groove; When the oil needle is separated from the plunger, the horizontal sheet is perpendicular to the first center axis; when the oil needle is matched with the plunger, the horizontal sheet fits with the inclined surface so that the center axis of the oil needle has an angle with the first center axis; the needle body is inserted into the oil inlet hole through the through hole.

2. The carburetor for improving the low-speed oil intake effect according to claim 1, characterized in that: The angle between the inclined surface and the horizontal sheet is 1°-5°.

3. The carburetor for improving the low-speed oil intake effect according to claim 2, characterized in that: The angle between the inclined surface and the horizontal sheet is 3°.

4. The carburetor for improving the low-speed oil intake effect according to claim 2, characterized in that: The included angle between the inclined surface and the horizontal sheet is 2.5°.

5. The carburetor for improving the low-speed oil intake effect according to claim 1, characterized in that: The inner wall of the oil inlet hole and the outer wall of the needle body are respectively provided with self-lubricating coatings.

6. The carburetor for improving the low-speed oil intake effect according to claim 1, characterized in that: A plurality of raised limiting parts are arranged on the side wall of the groove.

7. The carburetor for improving the low-speed oil intake effect according to claim 6, characterized in that: The edge of the limiting portion is rounded.

8. The carburetor for improving the low-speed oil intake effect according to claim 1, characterized in that: A weight-reducing hole is arranged on the plunger on the higher side of the inclined surface.

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