Timing installation positioning tool for engine camshaft

Abstract

The invention relates to the technical field of engines, and discloses an engine camshaft timing installation positioning tool which comprises a camshaft body and a crankshaft, a first pin hole is formed in the camshaft body, a second pin hole is formed in the crankshaft, an installation mechanism is arranged between the camshaft body and the crankshaft, and the installation mechanism comprises a first installation plate and a first side plate. The first side plate is connected with a second side plate through a guide rod, the second side plate is fixedly connected with a second mounting plate, screw rods are further arranged on the first side plate and the second side plate, adjusting mechanisms are arranged on the first mounting plate and the second mounting plate respectively, and each adjusting mechanism comprises an adjusting knob which is arranged on the second mounting plate and the first mounting plate, the adjusting knob is connected with a positioning column, the positioning column is sleeved with a timing mechanism, the timing mechanism comprises a positioning plate, a positioning ring is arranged on the positioning plate, a positioning hole is further formed in the positioning plate, and the problem that existing equipment cannot adapt to different engine models is solved.

Description

Technical Field

[0001] The invention relates to the technical field of engines, in particular to an engine camshaft timing installation and positioning tool. Background Art

[0002] During engine operation, the engine transmits the rotation of the crankshaft to the camshaft via a timing belt or chain according to the requirements of each cylinder's working cycle and ignition sequence. The cams on the camshaft timely control the opening or closing of the corresponding valves to complete the intake and exhaust operations, allowing fresh air and post-combustion exhaust gases to enter and exit the cylinders in a timely and sufficient manner. Therefore, timing installation is a key step in ensuring the accuracy of the engine's intake and exhaust timing. To facilitate installation, markings are generally made on the intake and exhaust camshaft gears and the engine, and on the crankshaft and the engine during design. During installation, the markings on the intake and exhaust camshaft gears and the engine, and on the crankshaft and the engine, are aligned to ensure accurate timing.

[0003] The Chinese invention patent with publication number , discloses a camshaft timing installation method and camshaft timing tooling. The method involves setting the camshaft timing tooling on the cylinder head of the engine and rotating the engine flywheel to the OT mark line position. At this time, the first positioning rod is located in the tooth groove at the top center of the idler wheel, and the second positioning rod points to the second marking tooth. The first marking tooth is then engaged with the second marking tooth to complete the camshaft timing installation. Through the above method, there is no need to process the marking tooth number on the gear, which reduces the production process and facilitates the manufacture and installation of gears related to valve timing. Moreover, after replacing the camshaft, the cam timing tooling can also be used to determine the second marking tooth of the idler wheel that is engaged with the camshaft, thereby improving assembly efficiency.

[0004] However, during use, this device has difficulty adapting to the difference in spacing between the camshaft body and the crankshaft when facing different models of engines, resulting in the same tool being unable to be used universally, increasing equipment costs; at the same time, when adjusting the angle between the two timing mechanisms to match the relative positions of the camshaft and crankshaft, there is a lack of convenient and precise adjustment methods, and coaxial deviations between the positioning holes and the pin holes often occur, affecting the timing installation accuracy and causing abnormal engine operation; in addition, the positioning components of some tools lack sufficient stability in matching with the shaft holes and pin holes, and are prone to displacement during installation, further reducing positioning reliability. Summary of the Invention

[0005] (1) Technical problems solved In response to the shortcomings of the existing technology, the present invention provides an engine camshaft timing installation and positioning tool, which has the advantage of being adaptable to a variety of engine models and solves the problem that existing equipment cannot adapt to different engine models.

[0006] (2) Technical solution To achieve the above-mentioned object, the present invention provides the following technical solution: an engine camshaft timing installation and positioning tool, comprising a camshaft body and a crankshaft, wherein the camshaft body is provided with a first pin hole, the crankshaft is provided with a second pin hole, a mounting mechanism is provided between the camshaft body and the crankshaft, the mounting mechanism comprising a first mounting plate and a first side plate fixedly connected to the first mounting plate, the first side plate being connected to the second side plate via a guide rod, the second side plate being fixedly connected to the second mounting plate, the first side plate and the second side plate being further provided with screws, the screws penetrating the first side plate and being threadedly connected to the second side plate, the first mounting plate and the second mounting plate being respectively provided with adjustment mechanisms, the adjustment mechanisms comprising: An adjusting knob is rotatably mounted on the second mounting plate and the first mounting plate, a positioning post is fixedly connected to the adjusting knob, a timing mechanism is movably sleeved on the positioning post, the timing mechanism includes a positioning plate, a positioning ring is provided on the positioning plate, and a positioning hole is further provided on the positioning plate, the positioning post passes through the positioning hole and cooperates with the first pin hole and the second pin hole for use; Among them, the positioning ring is inserted into the axial holes of the camshaft body and the crankshaft, and the angle of the positioning plate is changed so that the positioning hole is coaxial with the first pin hole and the second pin hole. Then, the screw is rotated to change the distance between the first mounting plate and the second mounting plate, so that the positioning column can pass through the positioning hole and be inserted into the first pin hole and the second pin hole, which can adapt to camshaft bodies and crankshafts with different spacings, and rotating the adjusting knob can drive the positioning plate and the positioning ring to rotate around the axis of the positioning column through the positioning column, thereby adjusting the angle between the two timing mechanisms according to the relative position of the camshaft body and the crankshaft.

[0007] Preferably, the positioning plate is divided into a first positioning plate and a second positioning plate, and the positioning ring is divided into a first positioning ring and a second positioning ring, the first positioning ring is arranged on the inner wall of the first positioning plate, and the second positioning ring is arranged on the inner wall of the second positioning plate, the positioning hole is opened on the first positioning plate or the second positioning plate, a threaded sleeve is fixedly provided on the inner wall of the second positioning ring, and an adjusting bolt is passed through the first positioning ring, and the adjusting bolt is used in conjunction with the threaded sleeve. By screwing the adjusting bolt into the interior of the threaded sleeve, the distance between the second positioning plate and the first positioning plate can be changed, and the distance between the first positioning ring and the second positioning ring can be changed at the same time, so that the fixed area formed between the first positioning ring and the second positioning ring meets the different shaft hole sizes of the camshaft body and the crankshaft.

[0008] Preferably, a limiting groove is provided on one side of the positioning plate close to the adjusting knob, and the limiting groove and the center of the positioning hole are located on the same axis. A limiting block is also fixedly mounted on the positioning column, and the limiting block is used in conjunction with the limiting groove. A penetrating observation hole is provided on the adjusting knob, and the length and width of the observation hole are respectively larger than the length and width of the limiting groove.

[0009] Preferably, mounting holes are respectively provided at the four corners of the first mounting plate and the second mounting plate for fixing the entire device on the engine.

[0010] Preferably, an embedding hole is provided on the outer wall of the first positioning ring, and the depth of the embedding hole is greater than the thickness of the adjusting bolt and nut, thereby facilitating the complete installation of the adjusting bolt into the interior of the first positioning ring.

[0011] Preferably, hard rubber pads are fixedly provided on the outer walls of the first positioning ring and the second positioning ring to enhance the friction with the inner wall of the shaft hole and facilitate fixation.

[0012] Preferably, the installation height of the guide rod and the screw rod on the first side plate and the second side plate is higher than the height of the adjusting knob, which facilitates the rotation of the screw rod.

[0013] Preferably, angle scale lines are engraved on the positions of the first mounting plate and the second mounting plate corresponding to the adjusting knobs, and an indicator arrow is provided on the edge of the adjusting knob for accurately marking the rotation angle of the positioning plate. Distance scale lines are engraved along the length direction of the guide rod on the first side plate, and a reference line is provided at the corresponding position on the second side plate for accurately marking the distance between the first mounting plate and the second mounting plate.

[0014] Preferably, the free ends of the first positioning ring and the second positioning ring are both provided with a guide cone surface, and the taper of the guide cone surface is 30°-45°, so as to facilitate insertion into the shaft holes of the camshaft body and the crankshaft.

[0015] Preferably, the outer wall of the adjusting knob is provided with anti-slip indentations, and the diameter of the adjusting knob is larger than the diameter of the positioning column. The end of the screw away from the second side plate is fixedly connected to a butterfly handle for easy manual screwing and adjustment.

[0016] (3) Beneficial effects Compared with the prior art, the present invention provides an engine camshaft timing installation and positioning tool, which has the following beneficial effects: This engine camshaft timing installation and positioning tool uses a screw to adjust the distance between the first and second mounting plates, and an adjustment knob to drive the rotation of the positioning column. This allows for adaptability to camshaft bodies and crankshafts with different spacing and relative angles, achieving a widely applicable effect. When faced with differences in the spacing between the camshaft and crankshaft in different engine models, turning the screw flexibly changes the distance between the two mounting plates, allowing the positioning column to accurately insert into the corresponding pin hole. At the same time, turning the adjustment knob adjusts the angle of the timing mechanism, ensuring precise alignment between the positioning ring and the shaft hole, and between the positioning hole and the pin hole. This design breaks the fixed size limitations of traditional tools and can be adapted to various engine specifications without changing the tool, significantly improving the tool's versatility, reducing equipment investment costs, and improving installation efficiency.

[0017] 2. This engine camshaft timing installation and positioning tool changes the distance between the first positioning plate and the second positioning plate by adjusting the cooperation between the bolt and the threaded sleeve, so that the fixed area formed by the positioning ring can adapt to the camshaft and crankshaft shaft holes of different sizes, thereby enhancing the adaptability of the tool. When there is a difference in the shaft hole diameters of the camshaft and the crankshaft, screwing the adjusting bolt can adjust the distance between the first positioning ring and the second positioning ring so that it fits tightly against the inner wall of the shaft hole. This adjustable structure avoids the trouble of replacing positioning components due to different shaft hole sizes, ensures stable installation on engines of various specifications, improves the scope of use and practicality of the tool, and reduces the time cost of the operator to replace the tool.

[0018] 3. This engine camshaft timing installation and positioning tool, through the cooperation of the limit block and the limit slot and the setting of the observation hole, realizes precise limiting and status observation when adjusting the positioning plate angle, thereby improving the installation positioning accuracy. During the process of adjusting the positioning plate angle, the limit block slides along the limit slot to limit the rotation range of the positioning plate and avoid positioning deviation caused by excessive rotation; the observation hole can intuitively observe the position of the limit block, which is convenient for the operator to judge whether the positioning hole and the pin hole are coaxial. This design effectively reduces human operation errors, ensures that the positioning column can be accurately inserted into the pin hole, ensures that the timing position of the camshaft and the crankshaft is accurate and correct, and improves the engine assembly quality and operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 This is an isometric schematic diagram of the structure of the present invention from another angle.

[0021] Figure 3 It is an isometric cross-sectional schematic diagram of the structure of the present invention.

[0022] Figure 4 It is a schematic cross-sectional view of the front view of the structure of the present invention.

[0023] Figure 5 This is a schematic isometric cross-sectional view from another angle of the structure of the present invention.

[0024] Figure 6 It is a schematic diagram of the installation mechanism structure of the present invention.

[0025] Figure 7 This is a schematic diagram of the installation mechanism structure from another angle of the present invention.

[0026] Figure 8 It is an isometric cross-sectional schematic diagram of the installation mechanism structure of the present invention.

[0027] Figure 9 It is a schematic cross-sectional view of the mounting mechanism structure of the present invention.

[0028] Figure 10 This is an isometric cross-sectional schematic diagram from another angle of the mounting mechanism structure of the present invention.

[0029] Figure 11 It is a schematic diagram of the structure of the adjustment mechanism of the present invention.

[0030] Figure 12 This is a schematic diagram of the adjustment mechanism structure from another angle of the present invention.

[0031] Figure 13 It is an isometric schematic diagram of the adjustment mechanism structure of the present invention.

[0032] Figure 14 It is an isometric cross-sectional schematic diagram of the adjustment mechanism structure of the present invention.

[0033] Figure 15 It is a schematic cross-sectional view of the adjustment mechanism structure of the present invention.

[0034] In the figure: 100, camshaft; 101, first pin hole; 110, crankshaft; 111, second pin hole; 200, first mounting plate; 210, second mounting plate; 220, first side plate; 230, second side plate; 240, guide rod; 250, screw; 260, mounting hole; 300, adjustment mechanism; 310, adjustment knob; 311, observation hole; 320, positioning column; 330, limit block; 340, first positioning plate; 341, first positioning ring; 350, second positioning plate; 351, second positioning ring; 360, positioning hole; 361, limit groove; 370, embedded hole; 380, threaded sleeve; 390, adjustment bolt. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0037] In addition, a fixed connection refers to a connection in which parts or components are fixed without any relative movement; a transmission connection refers to a connection method in which mechanical motion or torque is transmitted to other working parts through a transmission part; a sliding connection refers to a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotating connection refers to a connection method in which two objects are in contact but not fixed and can rotate relative to each other.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, features specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0039] Example 1: This embodiment provides an engine camshaft timing installation and positioning tool having the following technical features.

[0040] See also Figure 1-15A tool for installing and positioning an engine camshaft timing includes a camshaft body 100 and a crankshaft 110. The camshaft body 100 is provided with a first pin hole 101, and the crankshaft 110 is provided with a second pin hole 111. A mounting mechanism is provided between the camshaft body 100 and the crankshaft 110. The mounting mechanism includes a first mounting plate 200 and a first side plate 220 fixedly connected to the first mounting plate 200. The first side plate 220 is connected to the second side plate 230 via a guide rod 240. The second side plate 230 is fixedly connected to the second mounting plate 210. The first side plate 220 and the second side plate 230 are further provided with screws 250. The screws 250 pass through the first side plate 220 and are threadedly connected to the second side plate 230. The first mounting plate 200 and the second mounting plate 210 are respectively provided with adjustment mechanisms 300. The adjustment mechanism 300 includes: The adjusting knob 310 is rotatably mounted on the second mounting plate 210 and the first mounting plate 200. A positioning post 320 is fixedly connected to the adjusting knob 310. A timing mechanism is movably mounted on the positioning post 320. The timing mechanism includes a positioning plate, a positioning ring, and a positioning hole 360. The positioning post 320 passes through the positioning hole 360 ​​and cooperates with the first pin hole 101 and the second pin hole 111. It should be noted that after the positioning ring is inserted into the axial holes of the camshaft body 100 and the crankshaft 110, and the angle of the positioning plate is changed so that the positioning hole 360 ​​is coaxially arranged with the first pin hole 101 and the second pin hole 111, the screw 250 is rotated to change the distance between the first mounting plate 200 and the second mounting plate 210, so that the positioning post 320 can pass through the positioning hole 360 ​​and be inserted into the first pin hole 101 and the second pin hole 111, which can adapt to camshaft bodies 100 and crankshafts 110 with different spacings. Rotating the adjusting knob 310 can drive the positioning plate and the positioning ring to rotate around the axis of the positioning post 320 through the positioning post 320, thereby adjusting the angle between the two timing mechanisms according to the relative positions of the camshaft body 100 and the crankshaft 110. The adjusting knob 310 is a knob with a self-locking function in the prior art, which can be rotated to any angle and then locked.

[0041] In an optional embodiment, the positioning plate is divided into a first positioning plate 340 and a second positioning plate 350, and the positioning ring is divided into a first positioning ring 341 and a second positioning ring 351. The first positioning ring 341 is arranged on the inner wall of the first positioning plate 340, and the second positioning ring 351 is arranged on the inner wall of the second positioning plate 350. The positioning hole 360 ​​is opened on the first positioning plate 340 or the second positioning plate 350. A threaded sleeve 380 is fixedly provided on the inner wall of the second positioning ring 351, and an adjusting bolt 390 is penetrated by the first positioning ring 341. The adjusting bolt 390 is used in conjunction with the threaded sleeve 380. By screwing the adjusting bolt 390 so that it is screwed into the interior of the threaded sleeve 380, the distance between the second positioning plate 350 and the first positioning plate 340 can be changed, and the distance between the first positioning ring 341 and the second positioning ring 351 can be changed at the same time, so that the fixed area formed between the first positioning ring 341 and the second positioning ring 351 meets the different shaft hole sizes of the camshaft body 100 and the crankshaft 110.

[0042] In an optional embodiment, a limiting groove 361 is provided on one side of the positioning plate close to the adjusting knob 310, and the limiting groove 361 and the center of the positioning hole 360 ​​are located on the same axis. A limiting block 330 is also fixedly mounted on the positioning column 320, and the limiting block 330 is used in conjunction with the limiting groove 361. A penetrating observation hole 311 is provided on the adjusting knob 310, and the length and width of the observation hole 311 are respectively larger than the length and width of the limiting groove 361.

[0043] In an optional embodiment, mounting holes 260 are respectively provided at the four corners of the first mounting plate 200 and the second mounting plate 210 for fixing the entire device on the engine.

[0044] In an optional embodiment, an embedding hole 370 is opened on the outer wall of the first positioning ring 341 , and the depth of the embedding hole 370 is greater than the thickness of the nut of the adjusting bolt 390 , thereby facilitating the adjustment bolt 390 to be completely installed into the interior of the first positioning ring 341 .

[0045] In an optional embodiment, hard rubber pads are fixedly provided on the outer walls of the first positioning ring 341 and the second positioning ring 351 to enhance the friction with the inner wall of the shaft hole and facilitate fixation.

[0046] In an optional embodiment, the installation height of the guide rod 240 and the screw rod 250 on the first side plate 220 and the second side plate 230 is higher than the height of the adjustment knob 310 to facilitate the rotation of the screw rod 250 .

[0047] In an optional embodiment, angle scale lines are engraved on the first mounting plate 200 and the second mounting plate 210 at positions corresponding to the adjusting knobs 310, and an indicator arrow is provided on the edge of the adjusting knob 310 for accurately marking the rotation angle of the positioning plate. Distance scale lines are engraved on the first side plate 220 along the length direction of the guide rod 240, and a reference line is provided at a corresponding position on the second side plate 230 for accurately marking the distance between the first mounting plate 200 and the second mounting plate 210.

[0048] In an optional embodiment, the free ends of the first positioning ring 341 and the second positioning ring 351 are both provided with guiding cones, and the taper of the guiding cones is 30°-45°, which is convenient for inserting into the axial holes of the camshaft body 100 and the crankshaft 110.

[0049] In an optional embodiment, the outer wall of the adjustment knob 310 is provided with anti-slip indentations, and the diameter of the adjustment knob 310 is larger than the diameter of the positioning column 320. The end of the screw 250 away from the second side plate 230 is fixedly connected to a butterfly handle for easy manual twisting and adjustment.

[0050] Working principle: First, the spacing between the first locating ring 341 and the second locating ring 351 is changed by adjusting the bolt 390 and the threaded sleeve 380 to adapt to shaft holes of different sizes, and the fixation is enhanced with the help of a hard rubber pad. Then, the adjusting mechanism 300 is used to first insert the locating ring into the shaft holes of the camshaft 100 body and the crankshaft 110, and then the spacing between the first mounting plate 200 and the second mounting plate 210 is adjusted by adjusting the screw 250 in the mounting mechanism to adapt to camshafts 100 bodies and crankshafts 110 of different spacings; turning the adjusting knob 310 drives the limit block 330 to rotate around the axis of the locating column 320, and accurately adjusts the angle in combination with the angle scale line and the indicator arrow so that the locating hole 360 ​​is aligned with the first The pin hole 101 and the second pin hole 111 are coaxial, and finally the screw 250 is rotated to adjust the positioning column 320 to be able to pass through the positioning hole 360 ​​and insert into the first pin hole 101 and the second pin hole 111, while driving the limit block 330 to rotate so that it can be completely installed into the interior of the limit groove 361, thereby completing the timing positioning installation of the camshaft 100 body and the crankshaft 110. Finally, the entire device is fixed to the end face of the motor through the mounting hole 260. During the whole process, the guide cone surface facilitates the insertion of the positioning ring, the limit block 330 and the limit groove 361 ensure the positioning stability, the observation hole 311, the distance scale line and other designs improve the operation accuracy, and the anti-slip structure and butterfly handle facilitate manual adjustment operation.

[0051] In summary, the engine camshaft 100 timing installation and positioning tool adjusts the distance between the first mounting plate 200 and the second mounting plate 210 through the screw 250, and the positioning column 320 is driven to rotate by the adjustment knob 310 to achieve the adaptation of the camshaft 100 body and the crankshaft 110 of different spacings and relative angles, achieving a widely applicable effect. When faced with the difference in spacing between the camshaft 100 and the crankshaft 110 in different models of engines, rotating the screw 250 can flexibly change the distance between the two mounting plates, so that the positioning column 320 is accurately inserted into the corresponding pin hole; at the same time, rotating the adjustment knob 310 can adjust the angle of the timing mechanism, ensuring that the positioning ring and the shaft hole, and the positioning hole 360 ​​and the pin hole are accurately aligned. This design breaks the fixed size limitation of traditional tools and can adapt to engines of various specifications without changing tools, greatly improving the versatility of the tool, reducing equipment investment costs, and improving the efficiency of installation operations.

[0052] This engine camshaft 100 timing installation positioning tool changes the distance between the first positioning plate 340 and the second positioning plate 350 by adjusting the cooperation between the bolt 390 and the threaded sleeve 380, so that the fixed area formed by the positioning ring can adapt to the shaft holes of camshafts 100 and crankshafts 110 of different sizes, thereby enhancing the adaptability of the tool. When there is a difference in the shaft hole diameters of the camshaft 100 and the crankshaft 110, screwing the adjusting bolt 390 can adjust the distance between the first positioning ring 341 and the second positioning ring 351 so that it fits tightly against the inner wall of the shaft hole. This adjustable structure avoids the trouble of replacing positioning components due to different shaft hole sizes, ensures stable installation on engines of various specifications, improves the scope of use and practicality of the tool, and reduces the time cost of the operator replacing the tool.

[0053] This engine camshaft 100 timing installation and positioning tool realizes precise limiting and status observation when adjusting the positioning plate angle through the cooperation of the limit block 330 and the limit groove 361 and the setting of the observation hole 311, thereby achieving the effect of improving the installation and positioning accuracy. During the process of adjusting the positioning plate angle, the limit block 330 slides along the limit groove 361 to limit the rotation range of the positioning plate and avoid positioning deviation caused by excessive rotation; the observation hole 311 can intuitively observe the position of the limit block 330, which is convenient for the operator to judge whether the positioning hole 360 ​​is coaxial with the pin hole. This design effectively reduces human operation errors, ensures that the positioning column 320 can be accurately inserted into the pin hole, ensures that the timing position of the camshaft 100 and the crankshaft 110 is accurate and correct, and improves the engine assembly quality and operation stability.

[0054] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An engine camshaft timing installation and positioning tool, comprising a camshaft body (100) and a crankshaft (110), wherein the camshaft body (100) is provided with a first pin hole (101), and the crankshaft (110) is provided with a second pin hole (111). It is characterized by: A mounting mechanism is provided between the camshaft body (100) and the crankshaft (110); The mounting mechanism comprises a first mounting plate (200) and a first side plate (220) fixedly connected to the first mounting plate (200); the first side plate (220) is connected to a second side plate (230) via a guide rod (240); and the second side plate (230) is fixedly connected to a second mounting plate (210); The first side plate (220) and the second side plate (230) are further provided with screw rods (250), the screw rods (250) passing through the first side plate (220) and being threadedly connected to the second side plate (230), and the first mounting plate (200) and the second mounting plate (210) are respectively provided with adjustment mechanisms (300); The regulating mechanism (300) comprises: An adjusting knob (310) is rotatably arranged on the second mounting plate (210) and the first mounting plate (200), a positioning column (320) is fixedly connected to the adjusting knob (310), a timing mechanism is movably sleeved on the positioning column (320), the timing mechanism includes a positioning plate, a positioning ring is provided on the positioning plate, and a positioning hole (360) is also opened on the positioning plate, the positioning column (320) passes through the positioning hole (360) and is used in conjunction with the first pin hole (101) and the second pin hole (111).

2. The engine camshaft timing installation and positioning tool according to claim 1, characterized in that: The positioning plate is divided into a first positioning plate (340) and a second positioning plate (350), and the positioning ring is divided into a first positioning ring (341) and a second positioning ring (351). The first positioning ring (341) is arranged on the inner wall of the first positioning plate (340), and the second positioning ring (351) is arranged on the inner wall of the second positioning plate (350). The positioning hole (360) is opened on the first positioning plate (340) or the second positioning plate (350). A threaded sleeve (380) is fixedly provided on the inner wall of the second positioning ring (351). An adjusting bolt (390) is provided through the first positioning ring (341). The adjusting bolt (390) is used in conjunction with the threaded sleeve (380). By screwing the adjusting bolt (390) into the interior of the threaded sleeve (380), the distance between the second positioning plate (350) and the first positioning plate (340) can be changed, and the distance between the first positioning ring (341) and the second positioning ring (351) can be changed, so that the fixing area formed between the first positioning ring (341) and the second positioning ring (351) can meet the different shaft hole sizes of the camshaft body (100) and the crankshaft (110).

3. The engine camshaft timing installation and positioning tool according to claim 2, characterized in that: A limiting groove (361) is provided on a side of the positioning plate close to the adjusting knob (310), and the center of the limiting groove (361) and the positioning hole (360) are located on the same axis. A limiting block (330) is also fixedly mounted on the positioning column (320), and the limiting block (330) is used in conjunction with the limiting groove (361). A penetrating observation hole (311) is provided on the adjusting knob (310), and the length and width of the observation hole (311) are respectively larger than the length and width of the limiting groove (361).

4. The engine camshaft timing installation and positioning tool according to claim 1, characterized in that: Mounting holes (260) are respectively provided at the four corners of the first mounting plate (200) and the second mounting plate (210) for fixing the entire device on the engine.

5. The engine camshaft timing installation and positioning tool according to claim 2, characterized in that: An embedding hole (370) is provided on the outer wall of the first positioning ring (341), and the depth of the embedding hole (370) is greater than the thickness of the nut of the adjusting bolt (390), thereby facilitating the complete installation of the adjusting bolt (390) into the interior of the first positioning ring (341).

6. The engine camshaft timing installation and positioning tool according to claim 3, characterized in that: The outer walls of the first positioning ring (341) and the second positioning ring (351) are fixedly provided with hard rubber pads for enhancing friction with the inner wall of the shaft hole to facilitate fixation.

7. The engine camshaft timing installation and positioning tool according to claim 1, characterized in that: The installation height of the guide rod (240) and the screw rod (250) on the first side plate (220) and the second side plate (230) is higher than the height of the adjustment knob (310), making it easier to rotate the screw rod (250).

8. The engine camshaft timing installation and positioning tool according to claim 1, characterized in that: Angle scale lines are engraved on the positions of the first mounting plate (200) and the second mounting plate (210) corresponding to the adjustment knob (310), and an indicator arrow is provided on the edge of the adjustment knob (310) for accurately marking the rotation angle of the positioning plate. Distance scale lines are engraved on the first side plate (220) along the length direction of the guide rod (240), and a reference line is provided at a corresponding position on the second side plate (230) for accurately marking the distance between the first mounting plate (200) and the second mounting plate (210).

9. The engine camshaft timing installation and positioning tool according to claim 3, characterized in that: The free ends of the first positioning ring (341) and the second positioning ring (351) are both provided with a guide cone surface, and the taper of the guide cone surface is 30°-45°, so as to facilitate insertion into the shaft holes of the camshaft body (100) and the crankshaft (110).

10. The engine camshaft timing installation and positioning tool according to claim 1, characterized in that: The outer peripheral wall of the adjusting knob (310) is provided with anti-slip indentations, and the diameter of the adjusting knob (310) is larger than the diameter of the positioning column (320). The end of the screw (250) away from the second side plate (230) is fixedly connected to a butterfly handle for easy manual screwing and adjustment.

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