Intake and exhaust gear and its processing method

Abstract

The application discloses an air intake and exhaust gear and a machining method thereof, and relates to the technical field of gears, which comprises a connecting disc and a gear ring fixed to the outside of an output shaft, the outer surface of the connecting disc is fixed with four arc-shaped alignment blocks a arranged in an annular array, the vertical section of the connecting disc is in a convex structure, the four arc-shaped alignment blocks a and the outer side of the connecting disc are movably sleeved with a same annular sleeve seat, the inner wall of the annular sleeve seat is fixed with four arc-shaped alignment blocks b arranged in an annular array; the quick-mounting and quick-dismounting structure is arranged, the air intake and exhaust gear can be quickly mounted on the connecting disc of the output shaft, mounting and fixing are not needed through multiple bolts, the installation efficiency is greatly improved, the gear ring can be quickly and conveniently dismounted and replaced as a whole after the gear teeth on the gear ring are damaged, the gear with the integral forming structure in the prior art does not need to be replaced, and the replacement cost is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of intake and exhaust gear technology, and in particular to an intake and exhaust gear and its processing method. Background Technology

[0002] Intake and exhaust gears typically refer to the gears in the intake and exhaust systems of an internal combustion engine. These gears are used to control the opening and closing of valves to ensure proper intake and exhaust during normal engine operation. Intake and exhaust gears are usually driven by the camshaft, controlling valve movement through a gear transmission mechanism. These gears typically require precise design and machining to ensure proper engine operation and performance.

[0003] The existing intake and exhaust gear technology has the following disadvantages during use: When gears are installed on the output shaft of the drive structure in an internal combustion engine, they are usually fastened with multiple bolts, which makes it inconvenient to install or disassemble the gear as a whole, greatly reducing the installation efficiency. Secondly, gears are generally a one-piece structure. When the teeth on the gear wear out and need to be replaced, the entire gear needs to be replaced, which increases the replacement cost. To solve these problems, we have designed an intake and exhaust gear and its processing method. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an intake and exhaust gear and its processing method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An intake and exhaust gear includes a connecting disc and a gear ring fixedly connected to the outside of an output shaft. Four arc-shaped alignment blocks a arranged in a circular array are fixedly connected to the outer surface of the connecting disc. The vertical cross-section of the connecting disc has a convex structure. The four arc-shaped alignment blocks a and the outer side of the connecting disc are movably fitted with the same annular sleeve. Four arc-shaped alignment blocks b arranged in a circular array are fixedly connected to the inner wall of the annular sleeve. Each arc-shaped alignment block b is movably positioned between every two adjacent arc-shaped alignment blocks a. Multiple positioning grooves are opened on the outer side of the annular sleeve. Positioning blocks with a vertical cross-section of an isosceles trapezoidal structure are movably inserted into each positioning groove. The end of the multiple positioning blocks facing the output shaft is fixedly connected to the same gear ring, which is movably fitted on the outer side of the annular sleeve. The quick-installation and quick-disassembly structure is installed on the outer middle part of the connecting plate away from the output shaft and is connected to four arc-shaped alignment blocks b. The quick-installation and quick-disassembly structure is used to realize the quick installation and disassembly between the annular sleeve and the connecting plate, so as to achieve the purpose of quickly installing the intake and exhaust gears. Four locking structures are installed on the arc-shaped alignment block b and connected to the positioning blocks at corresponding positions. The four locking structures are used to realize the quick assembly between the gear ring and the annular sleeve. In particular, after the gear ring is damaged, the gear ring can be replaced separately, reducing the replacement cost.

[0006] Preferably, the quick-installation and quick-disassembly structure includes a turntable rotatably connected to the center of the side of the connecting plate away from the output shaft via a rotating shaft. The turntable has inclined grooves running through its four sides, and a transmission column is movably connected to each inclined groove. A plug is fixedly connected to the end of each transmission column away from the output shaft. The cross-section of each plug is I-shaped. A guide block is movably fitted on the outside of each plug. The guide block is fixedly connected to the outside of the connecting plate. The arc-shaped alignment block b has a slot that mates with the plug.

[0007] Preferably, each of the insert blocks has a connecting block fixedly attached to both sides of its side wall, and the connecting blocks are connected to the outside of the guide block by spring a.

[0008] Preferably, the locking structure includes a movable cavity opened on the inner side of the arc-shaped positioning block b, a locking block sliding in the movable cavity, the locking part of the locking block extending movably into the positioning groove and locking into the locking groove provided on the positioning block, the locking part of the locking block having an inclined surface, and one end of the locking block opposite to the locking part being connected to the inner wall of the movable cavity through a spring b.

[0009] Preferably, a push post is fixedly connected to the top of the card block, and the end of the push post opposite to the card block moves out through the movable groove opened on the arc-shaped alignment block b to the outside.

[0010] The present invention also provides a method for machining intake and exhaust gears, the method comprising the following steps: S1: Material preparation: Select appropriate materials, usually high-strength alloy steel or cast iron, and cut or forge each part according to design requirements; S2: Rough machining: Using turning, milling and other mechanical equipment, the shape and size of each workpiece are machined to be close to the final requirements; S3: Heat treatment: Heat treatment equipment is used to heat treat the workpiece after rough machining in order to improve its hardness and wear resistance; S4: Precision machining: Specialized equipment such as gear hobbing machines and gear grinding machines are used to precision machine the gear ring to ensure its meshing accuracy and surface finish. S5: Surface treatment: Perform some surface treatment work on the gear ring, such as hardening of the tooth surface and carburizing, to improve the wear resistance and service life of the gear. S6: Inspection: Inspect the dimensions, form and position tolerances, meshing performance, etc. of the machined gears to ensure that their quality meets the design requirements.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, by setting a quick-installation and quick-disassembly structure, the intake and exhaust gears can be quickly installed on the connecting plate of the output shaft without the need for installation and fixation by multiple bolts, which greatly improves the installation efficiency. Secondly, by using a locking structure, the gear ring can be quickly removed and replaced as a whole after the teeth on the gear ring are damaged, without the need to replace the gears of the existing one-piece molded structure, which effectively reduces the replacement cost. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the intake and exhaust gears after installation, as proposed in this invention. Figure 2 This is a schematic diagram of the exploded integral three-dimensional unfolded structure of the gear ring and the annular sleeve of the intake and exhaust gear and its processing method proposed in this invention. Figure 3 This is a three-dimensional structural diagram of each component in the quick-assembly and quick-disassembly structure of an intake and exhaust gear and its processing method proposed in this invention. Figure 4 This is a three-dimensional structural diagram of the components in the locking structure of the intake and exhaust gear and its processing method proposed in this invention.

[0013] In the diagram: 1. Output shaft; 2. Connecting disc; 21. Arc-shaped alignment block a; 3. Annular sleeve; 31. Arc-shaped alignment block b; 4. Quick-release structure; 41. Guide block; 42. Insert block; 421. Slot; 43. Connecting block; 44. Spring a; 45. Transmission column; 46. Turntable; 47. Rotating shaft; 5. Gear ring; 51. Positioning block; 511. Positioning groove; 6. Locking structure; 61. Locking block; 62. Push column; 63. Moving groove; 64. Spring b. Detailed Implementation

[0014] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0015] Example When gears are installed on the output shaft 1 of the drive structure in an internal combustion engine, they are generally fastened with multiple bolts, which makes it inconvenient to install or disassemble the gear as a whole, greatly reducing the efficiency of installation. Secondly, gears are generally an integral structure. When the teeth on the gear wear out and need to be replaced, the entire gear needs to be replaced, which increases the replacement cost.

[0016] Referring to Figure 4, an intake and exhaust gear includes a connecting disc 2 and a gear ring 5 fixedly connected to the outside of an output shaft 1. Four arc-shaped alignment blocks a21 arranged in a circular array are fixedly connected to the outer surface of the connecting disc 2. The vertical cross-section of the connecting disc 2 has a convex structure. The four arc-shaped alignment blocks a21 and the outer side of the connecting disc 2 are movably fitted with the same annular sleeve 3. The inner wall of the annular sleeve 3 is fixedly connected to four arc-shaped alignment blocks b31 arranged in a circular array. Each arc-shaped alignment block b31 is movably positioned between every two adjacent arc-shaped alignment blocks a21. The outer side of the annular sleeve 3 is provided with multiple positioning grooves 511. Positioning blocks 51 with a vertical cross-section of isosceles trapezoidal structure are movably inserted into each positioning groove 511. The end of the multiple positioning blocks 51 facing the output shaft 1 is fixedly connected to the same gear ring 5. The gear ring 5 is movably fitted on the outer side of the annular sleeve 3. The quick-installation and quick-disassembly structure 4 is installed on the outer middle part of the connecting plate 2 away from the output shaft 1 and is connected to four arc-shaped alignment blocks b31. The quick-installation and quick-disassembly structure 4 is used to realize the quick installation and disassembly between the annular sleeve 3 and the connecting plate 2, so as to achieve the purpose of quickly installing the intake and exhaust gear. Four locking structures 6 are installed on the arc-shaped alignment block b31 and connected to the corresponding positioning block 51. The four locking structures 6 are used to realize the quick assembly between the gear ring 5 and the annular sleeve 3. In particular, after the gear ring 5 is damaged, the gear ring 5 can be replaced separately, reducing the replacement cost.

[0017] The four arc-shaped alignment blocks b31 and a21 make it easier to install the annular sleeve 3 and the gear ring 5.

[0018] Furthermore, in order to facilitate the quick disassembly and detachment of the intake and exhaust gears from the connecting plate 2, a quick-installation and quick-release structure 4 is provided, including a turntable 46 rotatably connected to the center of the side of the connecting plate 2 away from the output shaft 1 via a rotating shaft 47. The turntable 46 has inclined grooves running through its four sides, and a transmission column 45 is movably connected to each of the inclined grooves. An insert block 42 is fixedly connected to the end of the transmission column 45 away from the output shaft 1. The cross-section of the insert block 42 is I-shaped. A guide block 41 is movably fitted on the outer side of each insert block 42. The guide block 41 is fixedly connected to the outer side of the connecting plate 2. The arc-shaped alignment block b31 has a slot 421 that mates with the insert block 42. A connecting block 43 is fixedly connected to the two side walls of each insert block 42. The connecting block 43 is connected to the outer side of the guide block 41 via a spring a44.

[0019] One end of the rotating shaft 47 opposite to the output shaft 1 is also fixed with a handle. The handle rotates the turntable 46 connected to the rotating shaft 47. With the action of the inclined groove, the four transmission columns 45 pull the insert 42 towards the rotating shaft 47, and the springs a44 are stretched. In addition, one end of the insert 42 is disengaged from the slot 421, so that the annular sleeve 3 and its gear ring 5 can be removed from the connecting plate 2.

[0020] Furthermore, the locking structure 6 includes a movable cavity opened inside the arc-shaped alignment block b31. A locking block 61 slides in the movable cavity. The locking part of the locking block 61 extends movably into the positioning groove 511 and locks into the locking groove provided on the positioning block 51. The locking part of the locking block 61 is provided with an inclined surface. One end of the locking block 61 opposite to the locking part is connected to the inner wall of the movable cavity through a spring b64. A push post 62 is fixedly connected to the top of the locking block 61. One end of the push post 62 opposite to the locking block 61 moves out through the movable groove 63 opened on the arc-shaped alignment block b31 to the outside.

[0021] The width of the movable groove 63 is smaller than the width of the movable cavity. When the gear ring 5 needs to be disassembled separately, the four push pins 62 can be pushed away from the rotating shaft 47 respectively, so that the inclined end of the locking block 61 is disengaged from the locking groove on the positioning block 51, thus making it easy to remove the gear ring 5 from the annular sleeve 3 for replacement.

[0022] The present invention also provides a method for machining intake and exhaust gears, the method comprising the following steps: S1: Material preparation: Select appropriate materials, usually high-strength alloy steel or cast iron, and cut or forge each part according to design requirements; S2: Rough machining: Using turning, milling and other mechanical equipment, the shape and size of each workpiece are machined to be close to the final requirements; S3: Heat treatment: Heat treatment equipment is used to heat treat the workpiece after rough machining in order to improve its hardness and wear resistance; S4: Precision machining: Specialized equipment such as gear hobbing machines and gear grinding machines are used to precision machine the gear ring 5 to ensure its meshing accuracy and surface finish. S5: Surface treatment: Perform some surface treatment work on the gear ring 5, such as hardening of the tooth surface and carburizing, to improve the wear resistance and service life of the gear. S6: Inspection: Inspect the dimensions, form and position tolerances, meshing performance, etc. of the machined gears to ensure that their quality meets the design requirements.

[0023] It should be noted that: when using this intake and exhaust gear, as shown in the attached... Figure 1As shown, the connecting plate 2, which is fixed to the outside of the output shaft 1 of the internal combustion engine drive structure, can be used to replace the gear ring 5 after long-term use. This can be achieved by pushing the four push pins 62 away from the rotating shaft 47, causing the inclined end of the locking block 61 to disengage from the slot on the positioning block 51, and compressing the spring b64. This makes it easier to remove the gear ring 5 from the annular sleeve 3 for replacement, reducing the cost of replacing the entire gear as in the prior art. Secondly, when the intake and exhaust gears need to be replaced as a whole, the handle can be used to rotate the turntable 46 connected to the rotating shaft 47. With the action of the inclined groove, the four transmission pins 45 pull the insert block 42 towards the rotating shaft 47, and the spring a44 is stretched. In addition, one end of the insert block 42 disengages from the slot 421, making it easier to remove the annular sleeve 3 and its gear ring 5 from the connecting plate 2, thus facilitating the removal of the gear.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intake and exhaust gear, comprising a connecting disc (2) and a gear ring (5) fixedly connected to the outside of an output shaft (1), characterized in that, The outer surface of the connecting plate (2) is fixed with four arc-shaped alignment blocks a (21) arranged in a ring array. The vertical cross section of the connecting plate (2) is convex. The four arc-shaped alignment blocks a (21) and the outer side of the connecting plate (2) are movably fitted with the same ring sleeve (3). The inner wall of the ring sleeve (3) is fixed with four arc-shaped alignment blocks b (31) arranged in a ring array. Each arc-shaped alignment block b (31) is movable between every two adjacent arc-shaped alignment blocks a (21). The outer side of the ring sleeve (3) is provided with multiple positioning grooves (511). Each positioning groove (511) is movably inserted with a positioning block (51) with a vertical cross section of an isosceles trapezoidal structure. The multiple positioning blocks (51) are fixed with the same toothed ring (5) at one end facing the output shaft (1). The toothed ring (5) is movably fitted on the outer side of the ring sleeve (3). The quick-installation and quick-disassembly structure (4) is installed on the outer middle part of the connecting plate (2) away from the output shaft (1) and is connected to four arc-shaped alignment blocks b (31); Four locking structures (6) are installed on the arc-shaped alignment block b (31) and connected to the positioning block (51) at the corresponding position; The quick-installation and quick-disassembly structure (4) includes a turntable (46) rotatably connected to the center of the side of the connecting plate (2) away from the output shaft (1) via a rotating shaft (47). The turntable (46) has inclined grooves running through its four sides. A transmission column (45) is movably connected in each of the inclined grooves. A plug (42) is fixedly connected to the end of the transmission column (45) away from the output shaft (1). The cross-section of the plug (42) is I-shaped. A guide block (41) is movably sleeved on the outside of the plug (42). The guide block (41) is fixedly connected to the outside of the connecting plate (2). A slot (421) that matches the plug (42) is opened on the arc-shaped alignment block b (31). Each of the inserts (42) has a connecting block (43) fixedly attached to both sides of its side wall. The connecting blocks (43) are connected to the outside of the guide block (41) via spring a (44). The locking structure (6) includes an active cavity opened on the inner side of the arc-shaped positioning block b (31), in which a locking block (61) slides. The locking part of the locking block (61) extends into the positioning groove (511) and is locked in the slot provided on the positioning block (51). The locking part of the locking block (61) is provided with an inclined surface. One end of the locking block (61) away from the locking part is connected to the inner wall of the active cavity through a spring b (64). The top of the card block (61) is fixedly connected to a push post (62), and the end of the push post (62) away from the card block (61) moves out through the moving groove (63) opened on the arc-shaped alignment block b (31) to the outside.

2. A method for machining intake and exhaust gears, characterized in that, Based on the intake and exhaust gear according to claim 1, the method includes the following steps: S1: Material preparation: Select high-strength alloy steel or cast iron, and cut or forge each part according to design requirements; S2: Rough machining: Using turning and milling machinery, the shape and size of each workpiece are machined to be close to the final requirements; S3: Heat treatment: Heat treatment equipment is used to heat treat the workpiece after rough machining in order to improve its hardness and wear resistance; S4: Precision machining: Use a gear hobbing machine and a gear grinding machine to perform precision machining on the gear ring (5) to ensure the meshing accuracy and surface finish of the gear ring (5); S5: Surface treatment: Harden and carburize the tooth surface of the gear ring (5) to improve the wear resistance and service life of the gear. S6: Inspection: Perform dimensional, geometric tolerance, and meshing performance inspections on the machined gears to ensure that their quality meets the design requirements.

Images