Engine idle speed regulating mechanism and engine

Abstract

The utility model provides an engine idling speed regulation mechanism and an engine, which comprise a speed regulation handle, a first pin shaft, a speed regulation arm, a first elastic element, an angular lever, an angular lever, an idling bolt, a second elastic element and a third elastic element, the two ends of the first elastic element are respectively connected with the speed regulation arm and the speed regulation handle, the angular lever synchronously rotates along with the speed regulation arm, and the idling bolt is arranged on the angular lever. The angular lever is connected with the fuel injection pump to control the fuel quantity of the fuel injection pump, the second elastic element is arranged on the side, relatively close to the machine body, of the first elastic element and far away from the first pin shaft relative to the first elastic element, and the two ends of the second elastic element are connected to the speed adjusting arm and the idle bolt correspondingly. The two ends of the third elastic element are connected to the speed adjusting arm and the gear chamber cover respectively. According to the engine idling speed regulating mechanism and the engine, the speed regulating arm can be controlled to be at the balance position, so that the oil supply amount of the oil injection pump is controlled to be stable, the idling speed of the engine is stable, the sound is normal, and the problem that the sound is abnormal when the engine idles is solved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical engineering, in particular to an engine idle speed regulating mechanism and an engine. Background Art

[0002] With the strict implementation of national emission regulations, mechanical fuel injection pump solutions for single-cylinder diesel engines are gaining popularity among customers and OEMs due to their cost-effectiveness, user acceptance, and ease of maintenance. Due to emissions concerns, the mechanical fuel injection pumps for single-cylinder engines have increased their fuel delivery. However, due to the mechanical pump's structure, it is difficult to control the fuel delivery at idle speed, causing significant engine fluctuations and abnormal noise, which impacts the normal operation of single-cylinder engines that meet China IV emission standards.

[0003] Therefore, it is necessary to provide an engine idle speed regulating mechanism and an engine to overcome the above-mentioned defects. Utility Model Content

[0004] The utility model aims to provide an engine idle speed regulating mechanism and an engine, which solves the problems that the fuel supply amount of the engine is difficult to control when the engine is idling, causing large engine fluctuations and abnormal noise, and the like.

[0005] According to one aspect of the utility model, an engine idle speed regulating mechanism is provided, comprising a speed regulating handle, a first pin shaft, a speed regulating arm, a first elastic element, an angular lever, an idle bolt, a second elastic element, and a third elastic element. The speed regulating handle is hinged to the engine body, the first pin shaft is passed through the gear chamber cover, with the end of the first pin shaft away from the gear chamber cover as the upper end, the speed regulating arm is placed above the gear chamber cover and connected to the first pin shaft and can drive the first pin shaft to rotate, the two ends of the first elastic element are respectively connected to the speed regulating arm and the speed regulating handle, the angular lever is placed in the gear chamber cover and connected to the speed regulating arm through the first pin shaft The angle lever is connected to the fuel injection pump to control the amount of oil in the fuel injection pump by rotating synchronously with the speed regulating arm. The idle bolt is placed between the speed regulating handle and the speed regulating arm, and the idle bolt is fixed to the gear chamber cover. The second elastic element is placed on the side of the first elastic element that is relatively close to the engine body and farther away from the first pin relative to the first elastic element. The two ends of the second elastic element are respectively connected to the speed regulating arm and the idle bolt. The third elastic element is placed on the side of the speed regulating arm that is relatively far away from the second elastic element. The two ends of the third elastic element are respectively connected to the speed regulating arm and the gear chamber cover. The third elastic element is closer to the first pin relative to the second elastic element. The above scheme helps to control the speed regulating arm to be in a balanced position when the engine is idling, thereby controlling the fuel supply of the fuel injection pump to be stable, thereby stabilizing the engine idle speed and making the engine sound normal, thus solving the problem of abnormal sound when the engine is idling.

[0006] Preferably, the speed regulating arm includes a main body and an extension extending upward from an end of the main body away from the first pin. The main body includes a first hanging hole proximate to the first pin and a second hanging hole farther from the pin relative to the first hanging hole. One end of the third elastic element is hung in the first hanging hole, and one end of the first elastic element is hung in the second hanging hole. This solution helps to achieve force balance on the speed regulating arm.

[0007] Preferably, the extension portion includes a third hanging hole, and one end portion of the second elastic element is hung on the third hanging hole.

[0008] Preferably, the first elastic element, the second elastic element and the third elastic element are all spring elements, and the elastic force of the third elastic element is smaller than the elastic force of the second elastic element and opposite to the tension of the second elastic element. The above solution helps to achieve force balance on the speed regulating arm.

[0009] Preferably, in the idle state, the speed regulating arm is subjected to the pulling force of the second elastic element and the pulling force of the third elastic element in the opposite direction to the second elastic element to achieve the balance of the speed regulating arm.

[0010] Preferably, the engine idle speed regulating mechanism further comprises a connecting seat connected to the frame and a second pin shaft disposed on the connecting seat, the speed regulating handle is connected to the connecting seat via the second pin shaft to achieve hinged connection with the frame, and the speed regulating handle can rotate around the second pin shaft.

[0011] Preferably, the speed regulating handle includes a connecting portion extending along the side of the speed regulating handle toward the first elastic element, the connecting portion includes a fourth hanging hole, and the other end of the first elastic element is hung on the fourth hanging hole.

[0012] Preferably, the angle lever includes a central portion sleeved on the lower end of the first pin shaft, and a first lever extending radially outward along the central portion, the central portion is sleeved on the rotating shaft and rotates synchronously with the rotating shaft, and the end of the first lever is connected to the fuel injection pump to control the amount of oil in the fuel injection pump.

[0013] Preferably, the angle lever further comprises a second lever extending radially outwardly along the central portion, the second lever being connected to the flyweight assembly. The above solution helps to achieve the balance of the angle lever and control the oil quantity of the fuel injection pump.

[0014] According to another aspect of the present invention, an engine is provided, comprising an engine body, a gear chamber cover, a fuel injection pump, a fly hammer assembly, and the engine idle speed control mechanism of the above-mentioned scheme. The fuel pump also comprises an fuel pump rack, which is connected to the end of a first lever and moves with the movement of the first lever to control the amount of oil in the fuel injection pump.

[0015] Preferably, the gear chamber cover is provided with an ear extending along the side of the machine body toward the speed regulating arm, the ear is provided with a fifth hanging hole, and the other end of the third elastic element is hung on the fifth hanging hole.

[0016] Preferably, the gear chamber cover further comprises a support arranged upright along the side surface of the gear chamber cover, the support is placed between the speed regulating handle and the speed regulating arm, and the idle bolt is placed on the support.

[0017] The utility model provides an engine idle speed regulating mechanism, comprising a speed regulating handle, a first pin shaft, a speed regulating arm, a first elastic element, an angle lever, an idle speed bolt, a second elastic element, and a third elastic element. In an idle state, the speed regulating arm is subjected to the pulling force of the second elastic element and the pulling force of the third elastic element in the opposite direction to the second elastic element, so as to achieve the balance of the speed regulating arm, thereby controlling the fuel supply of the fuel injection pump to be stable, thereby stabilizing the idle speed of the engine and making the engine sound normal, thereby solving the problem of abnormal sound when the engine is idling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] Figure 1 It is a three-dimensional schematic diagram of the idle speed regulating mechanism and part of the engine structure;

[0020] Figure 2 This is a top view of the idle speed regulating mechanism from above the gear chamber cover;

[0021] Figure 3 for Figure 2 A view along the direction of arrow M;

[0022] Figure 4 for Figure 1 A partial enlarged view of position A in the middle;

[0023] Figure 5 It is a partial schematic diagram of the idle speed governor;

[0024] Figure 6 Schematic diagram of the engine.

[0025] Description of Figure Numbers:

[0026] 10. Engine body; 20. Gear chamber cover; 30. Idle speed regulating mechanism; 40. Fuel injection pump; 50. Fly hammer assembly; 201. Ear; 202. Support; 301. Third elastic element; 302. Speed ​​regulating arm; 303. Second elastic element; 304. Idle bolt; 305. First pin; 306. First elastic element; 307. Speed ​​regulating handle; 308. Second pin; 309. Connection; 401. Oil pump rack; 3021. Main body; 3022. Extension; 3071. Connecting part; 3081. Center; 3082. First lever; 3083. Second lever; P1. First hanging hole; P2. Second hanging hole; P3. Third hanging hole; P4. Fourth hanging hole; P5. Fifth hanging hole; 100. Engine. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0029] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0030] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0031] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0033] See also Figures 1 to 6 As shown, this embodiment provides an idle speed regulating mechanism 30 of an engine 100, including a speed regulating handle 307, a first pin 305, a speed regulating arm 302, a first elastic element 306, an angular lever, an idle bolt 304, a second elastic element 303, and a third elastic element 301. The speed regulating handle 307 is hinged to the engine body 10, and the first pin 305 is passed through the gear chamber cover 20, with the end of the first pin 305 away from the gear chamber cover 20 as the upper part, the speed regulating arm 302 is placed above the gear chamber cover 20 and connected to the first pin 305 309 and can drive the first pin 305 to rotate, and the two ends of the first elastic element 306 are respectively connected 309 to the speed regulating arm 302 and the speed regulating handle 307, and the angular lever is placed in the gear chamber cover 20 and connected to the speed regulating arm 302 through the first pin 305 309 and moves with the speed regulating arm 302 rotates synchronously, the angle lever is connected to the injection pump 40 309 to control the oil volume of the injection pump 40, the idle bolt 304 is placed between the speed control handle 307 and the speed control arm 302, the idle bolt 304 is fixed on the gear chamber cover 20, the second elastic element 303 is placed on the side of the first elastic element 306 relatively close to the body 10 and away from the first pin shaft 305 relative to the first elastic element 306, the two ends of the second elastic element 303 are respectively connected 309 to the speed control arm 302 and the idle bolt 304, the third elastic element 301 is placed on the side of the speed control arm 302 relatively away from the second elastic element 303, the two ends of the third elastic element 301 are respectively connected 309 to the speed control arm 302 and the gear chamber cover 20, and the third elastic element 301 is close to the first pin shaft 305 relative to the second elastic element 303. The above solution helps to control the speed control arm 302 to be in a balanced position when the engine 100 is idling, thereby controlling the fuel supply of the injection pump 40 to be stable, thereby stabilizing the idling speed of the engine 100 and making the engine 100 sound normal, thus solving the problem of abnormal sound when the engine 100 is idling.

[0034] The speed regulating arm 302 includes a main body 3021 and an extension 3022 extending upward from the end of the main body 3021 away from the first pin 305. The main body 3021 includes a first hanging hole P1 near the first pin 305 and a second hanging hole P2 farther from the pin relative to the first hanging hole P1. One end of the third elastic element 301 is hung in the first hanging hole P1, and one end of the first elastic element 306 is hung in the second hanging hole P2. The extension 3022 includes a third hanging hole P3, and one end of the second elastic element 303 is hung in the third hanging hole P3. This solution helps to achieve force balance on the speed regulating arm 302.

[0035] The first elastic element 306, the second elastic element 303 and the third elastic element 301 are all spring elements. The elastic force of the third elastic element 301 is smaller than that of the second elastic element 303 and is opposite to the tension of the second elastic element 303. The above solution helps to achieve force balance on the speed regulating arm 302.

[0036] In the idle state, the speed regulating arm 302 is subjected to the pulling force of the second elastic element 303 and the pulling force of the third elastic element 301 in the opposite direction to the second elastic element 303 to achieve the balance of the speed regulating arm 302 .

[0037] The idle speed control mechanism 30 of the engine 100 also includes a connection 309 seat connected to the frame 309 and a second pin shaft 308 placed on the connection 309 seat. The speed control handle 307 is connected to the connection 309 seat 309 through the second pin shaft 308 to achieve an articulated connection with the frame, and the speed control handle 307 can rotate around the second pin shaft 308.

[0038] The speed regulating handle 307 includes a connection portion 309 extending along the side of the speed regulating handle 307 toward the first elastic element 306 . The connection portion 309 includes a fourth hanging hole P4 . The other end of the first elastic element 306 is hung on the fourth hanging hole P4 .

[0039] The angular lever includes a central portion 3081 sleeved on the lower end of the first pin shaft 305, and a first lever 3082 extending radially outward along the central portion 3081. The central portion 3081 is sleeved on the rotating shaft and rotates synchronously with the rotating shaft. The end of the first lever 3082 is connected to the fuel injection pump 40 309 to control the amount of oil in the fuel injection pump 40.

[0040] The angle lever further includes a second lever 3083 extending radially outward from the central portion 3081 , and the second lever 3083 is connected 309 to the flyweight assembly 50 . The above solution helps to achieve the balance of the angle lever and control the oil amount of the fuel injection pump 40 .

[0041] See also Figure 5 and Figure 6As shown, another aspect of this embodiment provides an engine 100, including a body 10, a gear chamber cover 20, a fuel injection pump 40, a fly hammer assembly 50, and the idle speed control mechanism 30 of the engine 100 of the above-mentioned scheme, the oil pump also includes an oil pump rack 401, and the end connection 309 of the oil pump rack 401 and the first lever 3082 moves with the movement of the first lever 3082 to control the amount of oil in the fuel injection pump 40.

[0042] The gear chamber cover 20 is provided with an ear portion 201 extending along the side of the machine body 10 toward the speed regulating arm 302 . The ear portion 201 is provided with a fifth hanging hole P5 . The other end of the third elastic element 301 is hung on the fifth hanging hole P5 .

[0043] The gear chamber cover 20 further includes a support 202 erected along the side of the gear chamber cover 20 . The support 202 is placed between the speed regulating handle 307 and the speed regulating arm 302 , and the idle bolt 304 is placed on the support 202 .

[0044] For example, the working principle of this embodiment is as follows: when the engine 100 is idling, the speed regulating handle 307 is not subjected to external tension, and the first elastic element 306 does not work at this time. The second elastic element 303 on the same side as the first elastic element 306 has one end hung on the third hanging hole P3 of the speed regulating arm 302 and the other end hung on the idle bolt 304, and the idle bolt 304 is fixed on the support 202 on the gear chamber cover 20. Therefore, when the engine 100 is idling, the second elastic element 303 works, and the tension of the second elastic element 303 pulls the speed regulating arm 302 to rotate toward the side of the second elastic element 303. Since the speed regulating arm 302 is coaxially connected to the angle lever 309 through the first pin shaft 305, and the end of the first lever 3082 of the angle lever is connected to the rack 309 of the injection pump 40, when the second elastic element 303 is idling, the second elastic element 303 works. When the tension of the second elastic element 303 pulls the speed regulating arm 302, the oil pump rack 401 causes the fuel injection pump 40 to supply oil. At this time, the third elastic element 301, with one end hanging on the first hanging hole P1 on the speed regulating arm 302 and the other end hanging on the hook of the gear chamber cover 20, has a pulling direction opposite to that of the second elastic element 303. When the speed regulating arm 302 is pulled toward the second elastic element 303 by the second elastic element 303, the third elastic element 301 is tightened accordingly. At this time, the speed regulating arm 302 is in a state of balance between the two opposite pulling forces provided by the second elastic element 303 and the third elastic element 301, thereby achieving stable control of the fuel supply of the fuel injection pump 40 by the angle lever, thereby stabilizing the idle speed of the engine 100 and ensuring normal engine sound, avoiding abnormal sound or noise. This embodiment has a simple and practical structure and reduces the cost of the engine 100.

[0045] The utility model provides an engine 100 idle speed control mechanism 30, including a speed control handle 307, a first pin shaft 305, a speed control arm 302, a first elastic element 306, an angle lever, an idle bolt 304, a second elastic element 303, and a third elastic element 301. In the idle state, the speed control arm 302 is subjected to the pulling force of the second elastic element 303 and the pulling force of the third elastic element 301 in the opposite direction to the second elastic element 303 to achieve the balance of the speed control arm 302, thereby controlling the fuel supply of the injection pump 40 to be stable, thereby stabilizing the idle speed of the engine 100 and making the engine 100 sound normal, thereby solving the problem of abnormal sound when the engine 100 is idling.

[0046] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

Claims

1. An engine idle speed regulating mechanism, characterized in that include: A speed regulating handle, the speed regulating handle being hinged to the machine body; a first pin shaft, the first pin shaft being passed through the gear chamber cover, with an end of the first pin shaft away from the gear chamber cover being the upper end; a speed regulating arm, the speed regulating arm being placed above the gear chamber cover and connected to the first pin shaft and capable of driving the first pin shaft to rotate; a first elastic element, wherein two ends of the first elastic element are respectively connected to the speed regulating arm and the speed regulating handle; An angle lever, the angle lever is disposed in the gear chamber cover and is connected to the speed regulating arm via the first pin shaft so as to rotate synchronously with the speed regulating arm, and the angle lever is connected to the fuel injection pump to control the amount of oil in the fuel injection pump; An idle bolt, the idle bolt being placed between the speed regulating handle and the speed regulating arm, and the idle bolt being fixed to the gear chamber cover; a second elastic element, the second elastic element being disposed on a side of the first elastic element relatively close to the engine body and relatively far away from the first pin shaft, with two ends of the second elastic element being respectively connected to the speed regulating arm and the idle bolt; The third elastic element is placed on a side of the speed regulating arm relatively away from the second elastic element, with both ends of the third elastic element respectively connected to the speed regulating arm and the gear chamber cover, and the third elastic element is close to the first pin shaft relative to the second elastic element.

2. An engine idle speed regulating mechanism according to claim 1, characterized in that: The speed regulating arm includes a main body and an extension portion extending upward along the end of the main body away from the first pin shaft. The main body includes a first hanging hole close to the first pin shaft and a second hanging hole away from the pin shaft relative to the first hanging hole. One end of the third elastic element is hung on the first hanging hole, and one end of the first elastic element is hung on the second hanging hole.

3. An engine idle speed regulating mechanism according to claim 2, characterized in that: The extension portion includes a third hanging hole, and one end portion of the second elastic element is hung on the third hanging hole.

4. An engine idle speed regulating mechanism according to claim 3, characterized in that: The first elastic element, the second elastic element, and the third elastic element are all spring elements. The elastic force of the third elastic element is smaller than the elastic force of the second elastic element and is opposite to the pulling force of the second elastic element.

5. An engine idle speed regulating mechanism according to claim 4, characterized in that: In the idle state, the speed regulating arm is subjected to the pulling force of the second elastic element and the pulling force of the third elastic element in the opposite direction to the second elastic element to achieve the balance of the speed regulating arm.

6. An engine idle speed regulating mechanism according to claim 4 or 5, characterized in that: It also includes a connecting seat connected to the frame and a second pin shaft placed on the connecting seat. The speed regulating handle is connected to the connecting seat through the second pin shaft to achieve hinged connection with the frame, and the speed regulating handle can rotate around the second pin shaft.

7. An engine idle speed regulating mechanism according to claim 6, characterized in that: The speed regulating handle includes a connecting portion extending along a side of the speed regulating handle toward the first elastic element. The connecting portion includes a fourth hanging hole. The other end of the first elastic element is hung on the fourth hanging hole.

8. An engine idle speed regulating mechanism according to claim 7, characterized in that: The angle lever includes a central portion sleeved on the lower end of the first pin shaft, and a first lever extending radially outward along the central portion. The central portion is sleeved on the rotating shaft and rotates synchronously with the rotating shaft. The end of the first lever is connected to the fuel injection pump to control the amount of oil in the fuel injection pump.

9. An engine idle speed regulating mechanism according to claim 8, characterized in that: The angle lever further includes a second lever extending radially outward from the central portion, the second lever being connected to a flyweight assembly.

10. An engine, characterized in that: It includes an engine body, a gear chamber cover, a fuel injection pump, a flyweight assembly, and the engine idle speed control mechanism as described in claims 1 to 9. The fuel pump also includes an fuel pump rack, which is connected to the end of the first lever and moves with the movement of the first lever to control the amount of oil in the fuel injection pump.

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