A calculation method, device, computer device and storage medium for gear angles

Abstract

The present application discloses a method, apparatus, computer device and storage medium for calculating the gear angle. The method for calculating the gear angle is used to calculate the timing angle of the entire gear train. The calculation method includes: setting the line connecting the center of the crankshaft gear and the center of the double-connected large gear as the first line, and setting the line connecting the center of the double-connected small gear and the center of the intermediate idler gear as the second line; setting the included angle value between the tooth center line of the second identification point of the double-connected large gear and the tooth center line of the third identification point of the double-connected small gear as α, and setting the included angle value between the first line and the second line as β; according to the calculation formula: n4 = (α - β) × r3 / r4, calculate the timing angle of the intermediate idler gear. The calculation result of the above method for calculating the gear angle is accurate and convenient for subsequent engine timing detection.

Description

Technical Field

[0001] The present application relates to the technical field of gear timing angle calculation, and particularly relates to a method, device, computer device, and storage medium for calculating gear angles. Background Art

[0002] For a four-stroke engine, when the camshaft gear is at the top dead center of the first cylinder, the crankshaft gear must be at the top dead center of the first and sixth cylinders. In order to ensure the correct positions of the crankshaft gear and the camshaft gear, the gear timing angle of the engine gear must be accurately calculated during the initial design to ensure the correct timing transmission of the engine.

[0003] Currently, there is no introduction to the calculation angle of the engine gear timing in the market. Mostly, the method of tangent tooth surfaces of paired gears or schematic diagrams are used, or the timing angle between the crankshaft and the camshaft is detected after installation. The method of tangent tooth surfaces is not accurate enough. Since it involves drawing the tooth surfaces of the gears and then making them tangent, the calculation method is difficult, requiring a large amount of time for calculation, and the influence of gear clearance needs to be considered. Currently, the timing angle of the engine gear is not accurately calculated, and there will be a small calculation error in the timing angle of the engine gear. Detecting the timing angle between the crankshaft and the camshaft after installation is time-consuming and laborious. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a calculation method, device, computer device, and storage medium for calculating gear angles with higher accuracy.

[0005] A method for calculating gear angles is used to calculate the timing angle of the entire gear train. The entire gear train includes: a crankshaft gear, a double large gear driven by meshing with the crankshaft gear, a double small gear driven coaxially by the double large gear, an intermediate idler gear driven by meshing with the double small gear, a camshaft idler gear driven by meshing with the intermediate idler gear, and a camshaft gear driven by meshing with the camshaft idler gear. The calculation method includes:

[0006] Setting parameters:

[0007] Set the connection line between the center of the crankshaft gear and the center of the double large gear as the first connection line, and set the connection line between the center of the double small gear and the center of the intermediate idler gear as the second connection line;

[0008] Set the included angle value between the tooth center line of the second identification point of the double large gear and the tooth center line of the third identification point of the double small gear as α, and set the included angle value between the first connection line and the second connection line as β;

[0009] Calculating results:

[0010] According to the calculation formula: n4 = (α - β) × r3 / r4, the timing angle of the intermediate idle gear is calculated; where: n4 is the central angle degree of the intermediate idle gear, α is the included angle value between the tooth center line of the second identification point and the tooth center line of the third identification point, β is the included angle value between the first connection line and the second connection line, r3 is the pitch circle radius of the double small gear, and r4 is the pitch circle radius of the intermediate idle gear.

[0011] In some embodiments, the step of setting the parameters further includes:

[0012] Set the pitch circle of the crankshaft gear as the first pitch circle, set the pitch circle of the double large gear as the second pitch circle, set the pitch circle of the double small gear as the third pitch circle, and set the pitch circle of the intermediate idle gear as the fourth pitch circle;

[0013] Regarding the paired gears as two circles performing pure rolling motion, the first pitch circle and the second pitch circle perform pure rolling motion, and the third pitch circle and the fourth pitch circle perform pure rolling motion.

[0014] In some embodiments, the step of setting the parameters further includes:

[0015] Set the tooth center line of the third identification point of the double small gear to intersect the third pitch circle at point C, set the tooth groove center line of the fourth identification point of the intermediate idle gear to intersect the fourth pitch circle at point B, set the third pitch circle and the fourth pitch circle to be tangent at point A, and the second connection line to intersect the fourth pitch circle at point A.

[0016] In some embodiments, the step of setting the parameters further includes:

[0017] Set the tooth groove center line of the first identification point of the crankshaft gear to coincide with the first connection line, and set the tooth center line of the second identification point of the double large gear to coincide with the first connection line;

[0018] And, the step of calculating the result specifically includes:

[0019] According to the central angle calculation formula: n3 = α - β, and the arc length calculation formula L AC = n3 × π × r3 / 180, the arc length L AC is calculated; where: n3 is the central angle degree of the double small gear, and L AC is the arc length of AC;

[0020] According to the arc length equality calculation formula: L AB = L AC , and then according to L AB = n4 × π × r4 / 180, the central angle n4 timing angle is calculated; where: L AB is the arc length of AB.

[0021] In some embodiments, the step of calculating the result further includes:

[0022] Calculating the offset angle between the center line of the tooth groove of the fourth identification point of the intermediate idle gear and the second connecting line according to the timing angle of the intermediate idle gear;

[0023] By analogy, all the timing angles of the whole set of gears can be calculated.

[0024] An accurate calculation device for gear angles includes:

[0025] A first module for setting parameters;

[0026] A second module for calculating the result.

[0027] A computer device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of the above calculation method are implemented.

[0028] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above calculation method are implemented.

[0029] Compared with the above background technology, the gear angle calculation method provided by the present application is used to calculate the timing angles of the whole set of gear trains. The calculation method includes setting parameters and calculating the result. In setting parameters: Set the connecting line between the center of the crankshaft gear and the center of the double-connected large gear as the first connecting line, and set the connecting line between the center of the double-connected small gear and the center of the intermediate idle gear as the second connecting line; Set the included angle value between the tooth center line of the second identification point of the double-connected large gear and the tooth center line of the third identification point of the double-connected small gear as α, and set the included angle value between the first connecting line and the second connecting line as β. In calculating the result: According to the calculation formula: n4 = (α - β) × r3 / r4, the timing angle of the intermediate idle gear is calculated. This gear angle calculation method is more accurate than the traditional tooth surface tangency and post-installation detection. The calculation result is accurate and error-free, which is convenient for subsequent engine timing detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0031] Figure 1 It is a schematic flowchart of the gear angle calculation method provided by the embodiment of the present application;

[0032] Figure 2 Structural schematic diagram of the gear angle calculation method provided by the embodiment of the present application;

[0033] Figure 3 is Figure 2 Partial enlarged schematic diagram of M in

[0034] Figure 4 is Figure 2 Partial enlarged schematic diagram of N in

[0035] Wherein:

[0036] 1 - crankshaft gear, 2 - double - large gear, 3 - double - small gear, 4 - intermediate idler gear, 5 - camshaft idler gear, 6 - camshaft gear;

[0037] 10 - first pitch circle, 20 - second pitch circle, 30 - third pitch circle, 40 - fourth pitch circle;

[0038] 012 - first connection line, 034 - second connection line, 045 - third connection line, 056 - fourth connection line;

[0039] 301 - tooth center line of the third identification point, 401 - tooth space center line of the fourth identification point. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0041] In order to enable those skilled in the art of this technology to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] Please refer to Figures 1 to 4 , wherein, Figure 1 is the flow schematic diagram of the gear angle calculation method provided by the embodiment of the present application, Figure 2 is the structural schematic diagram of the gear angle calculation method provided by the embodiment of the present application, Figure 3 is Figure 2 Partial enlarged schematic diagram of M in Figure 4 is Figure 2 Partial enlarged schematic diagram of N in

[0043] In the first specific embodiment, the present application provides a gear angle calculation method for calculating the timing angle of the entire gear train.

[0044] The whole gear train includes a crankshaft gear 1, a double - large gear 2, a double - small gear 3, an intermediate idle gear 4, a camshaft idle gear 5 and a camshaft gear 6. The double - large gear 2 and the double - small gear 3 are set as a whole and rotate coaxially. The double - large gear 2 is meshed and driven by the crankshaft gear 1, the double - small gear 3 is coaxially driven by the double - large gear 2, the intermediate idle gear 4 is meshed and driven by the double - small gear 3, the camshaft idle gear 5 is meshed and driven by the intermediate idle gear 4, and the camshaft gear 6 is meshed and driven by the camshaft idle gear 5.

[0045] The calculation method includes setting parameters and calculating results, specifically including the following steps:

[0046] Set the line connecting the center of the crankshaft gear 1 and the center of the double - large gear 2 as the first connection line 012, and set the line connecting the center of the double - small gear 3 and the center of the intermediate idle gear 4 as the second connection line 034;

[0047] Set the included - angle value between the tooth center line of the second identification point of the double - large gear 2 and the tooth center line 301 of the third identification point of the double - small gear 3 as α, and set the included - angle value between the first connection line 012 and the second connection line 034 as β;

[0048] According to the calculation formula: n4 = (α - β)×r3 / r4, calculate the timing angle of the intermediate idle gear 4; where: n4 is the central angle degree of the intermediate idle gear 4, α is the included - angle value between the tooth center line of the second identification point and the tooth center line 301 of the third identification point, β is the included - angle value between the first connection line 012 and the second connection line 034, r3 is the pitch - circle radius of the double - small gear 3, and r4 is the pitch - circle radius of the intermediate idle gear 4.

[0049] In addition, the line connecting the center of the intermediate idle gear 4 and the center of the camshaft idle gear 5 is the third connection line 045, and the line connecting the center of the camshaft idle gear 5 and the center of the camshaft gear 6 is the fourth connection line 056.

[0050] The calculation method of the gear angle is an accurate calculation method for the timing angle of the engine gear. By using the method that the arc lengths of the pitch circles of the paired gears are equal to calculate the gear timing angle, compared with the traditional tooth - surface tangency and post - installation detection, the calculation is more accurate, the calculation result is accurate and error - free, which is convenient for subsequent engine timing detection.

[0051] In some embodiments, the step of setting parameters further includes the following steps:

[0052] Set the pitch - circle of the crankshaft gear 1 as the first pitch - circle 10, set the pitch - circle of the double - large gear 2 as the second pitch - circle 20, set the pitch - circle of the double - small gear 3 as the third pitch - circle 30, and set the pitch - circle of the intermediate idle gear 4 as the fourth pitch - circle 40;

[0053] Regarding the paired gears as two circles performing pure rolling motion, the first circle 10 and the second circle 20 perform pure rolling motion, and the third circle 30 and the fourth circle 40 perform pure rolling motion.

[0054] In some embodiments, the step of setting parameters further includes the following steps:

[0055] Set the third marked point tooth center line 301 of the double gear 3 to intersect the third circle 30 at point C, set the fourth marked point tooth groove center line 401 of the intermediate idle gear 4 to intersect the fourth circle 40 at point B, set the third circle 30 to be tangent to the fourth circle 40 at point A, and the second connection line 034 to intersect the fourth circle 40 at point A.

[0056] In some embodiments, the step of setting parameters further includes the following steps:

[0057] Set the first marked point tooth groove center line of the crankshaft gear 1 to coincide with the first connection line 012, and set the second marked point tooth center line of the double gear 2 to coincide with the first connection line 012;

[0058] Moreover, the step of calculating the result specifically includes the following steps:

[0059] According to the central angle calculation formula: n3 = α - β, and the arc length calculation formula L AC = n3×π×r3 / 180, calculate the arc length L AC ; where: n3 is the central angle degree of the double gear 3, and L AC is the arc length of AC;

[0060] According to the arc length equality calculation formula: L AB = L AC , and then according to L AB = n4×π×r4 / 180, calculate the positive central angle n4; where: L AB is the arc length of AB.

[0061] In this embodiment, due to the fixed angle between the second marked point tooth center line of the double gear 2 and the third marked point tooth center line 301 of the double gear 3, the third marked point tooth center line 301 of the double gear 3 has an angular offset from the second connection line 034. According to the gear angle relationship, the angle between the third marked point tooth center line 301 of the double gear 3 and the second connection line 034 can be calculated, and the arc length of AC on the third circle 30 can be calculated.

[0062] The generation of an angular offset in the second connecting line 034 will cause an angular offset between the center line 401 of the fourth identification point tooth groove of the intermediate idle gear 4 and the second connecting line 034. In order to calculate the offset angle between the center line 401 of the fourth identification point tooth groove of the intermediate idle gear 4 and the second connecting line 034, the third pitch circle 30 and the fourth pitch circle 40 perform pure rolling, and it is necessary to set the arc length of AB on the fourth pitch circle 40 to be equal to the arc length of AC on the third pitch circle 30. According to the arc length formula L = n×π×r / 180 (n is the central angle degree, r is the radius, and L is the central angle arc length), the positive angle of the central angle n degree can be calculated.

[0063] It should be noted that the center line of the first identification point tooth groove of the crankshaft gear 1 can be set to coincide or not coincide with the first connecting line 012, and the center line of the second identification point tooth of the double - linked large gear 2 can be set to coincide or not coincide with the first connecting line 012; for the convenience of derivation, during the positive - time transmission process of the above - mentioned parts, it is assumed that the center line of the first identification point tooth groove of the crankshaft gear 1 coincides with the first connecting line 012, and the center line of the second identification point tooth of the double - linked large gear 2 coincides with the first connecting line 012.

[0064] In some embodiments, the steps of calculating the results further include the following steps:

[0065] According to the positive - time angle of the intermediate idle gear 4, calculate the offset angle between the center line 401 of the fourth identification point tooth groove of the intermediate idle gear 4 and the second connecting line 034;

[0066] By analogy, all the positive - time angles of the whole set of gears can be calculated.

[0067] In this embodiment, after calculating the positive - time angle of the intermediate idle gear 4, further calculate the offset angle γ between the center line 401 of the fourth identification point tooth groove of the intermediate idle gear 4 and the second connecting line 034. By analogy, all the positive - time angles of the whole set of gears can be calculated, and the angles of the whole set of gear systems can be edited into formulas in relevant software. After the formula editing is completed, only by inputting the initial data of the gear parameters, the positive - time angles of the whole set of gear systems can be accurately calculated.

[0068] This application also provides an accurate calculation device for gear angles, including a first module and a second module. Among them, the first module is used to set parameters, and the second module is used to calculate the results.

[0069] For the specific limitations of the accurate calculation device for gear angles, reference can be made to the limitations on the calculation method of gear angles in the above text, which will not be elaborated here. Each module in the above - mentioned accurate calculation device for gear angles can be implemented in whole or in part through software, hardware, and their combinations. The above - mentioned modules can be embedded in the processor of the computer device in hardware form or be independent of it, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above - mentioned modules.

[0070] The present application also provides a computer device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of the above-mentioned gear angle calculation method are implemented.

[0071] The computer device may be a terminal, including a processor, a memory, a network interface, a display screen, and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a gear angle calculation method is implemented. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device may be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the housing of the computer device, or an external keyboard, a touchpad, or a mouse, etc.

[0072] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned gear angle calculation method are implemented.

[0073] Those skilled in the art can understand that all or part of the processes in implementing the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it may include the processes of the embodiments of the above methods. The non-volatile memory may include a read-only memory (ROM), a programmable ROM (PROM), an electrically programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), or a flash memory. The volatile memory may include a random access memory (RAM) or an external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0074] It should be noted that many components mentioned in this application are common standard components or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or by conventional experimental methods.

[0075] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0076] The above has introduced in detail the calculation method, device, computer equipment and storage medium of the gear angle provided by this application. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A method for calculating the gear angle, which is used to calculate the timing angle of the entire gear train. The entire gear train includes: A crankshaft gear (1), a double large gear (2) driven by meshing with the crankshaft gear (1), a double small gear (3) driven coaxially by the double large gear (2), an intermediate idler gear (4) driven by meshing with the double small gear (3), a camshaft idler gear (5) driven by meshing with the intermediate idler gear (4), and a camshaft gear (6) driven by meshing with the camshaft idler gear (5), wherein the calculation method includes: Setting parameters: Setting the line connecting the center of the crankshaft gear (1) and the center of the double large gear (2) as the first line (012), and setting the line connecting the center of the double small gear (3) and the center of the intermediate idler gear (4) as the second line (034); Setting the included angle value between the second marked point tooth center line of the double large gear (2) and the third marked point tooth center line (301) of the double small gear (3) as α, and setting the included angle value between the first line (012) and the second line (034) as β; Calculating results: According to the calculation formula: n4 = (α - β) × r3 / r4, calculating the timing angle of the intermediate idler gear (4); where: n4 is the central angle degree of the intermediate idler gear (4), α is the included angle value between the second marked point tooth center line and the third marked point tooth center line (301), β is the included angle value between the first line (012) and the second line (034), r3 is the pitch circle radius of the double small gear (3), and r4 is the pitch circle radius of the intermediate idler gear (4).

2. The calculation method of the gear angle according to claim 1, characterized in that, The step of setting parameters further includes: Setting the pitch circle of the crankshaft gear (1) as the first pitch circle (10), setting the pitch circle of the double large gear (2) as the second pitch circle (20), setting the pitch circle of the double small gear (3) as the third pitch circle (30), and setting the pitch circle of the intermediate idler gear (4) as the fourth pitch circle (40); Regarding the paired gears as two circles performing pure rolling motion, the first pitch circle (10) and the second pitch circle (20) perform pure rolling motion, and the third pitch circle (30) and the fourth pitch circle (40) perform pure rolling motion.

3. The calculation method of the gear angle according to claim 2, characterized in that, The step of setting parameters further includes: Setting the intersection point of the third marked point tooth center line (301) of the double small gear (3) and the third pitch circle (30) as point C, setting the intersection point of the fourth marked point tooth groove center line (401) of the intermediate idler gear (4) and the fourth pitch circle (40) as point B, setting the third pitch circle (30) and the fourth pitch circle (40) to be tangent at point A, and the second line (034) intersects the fourth pitch circle (40) at point A.

4. The calculation method of the gear angle according to claim 3, wherein The step of setting parameters further includes: Setting the first marked point tooth groove center line of the crankshaft gear (1) to coincide with the first line (012), and setting the second marked point tooth center line of the double large gear (2) to coincide with the first line (012); And the step of calculating results specifically includes: According to the central angle calculation formula: n3 = α - β, and the arc length calculation formula L AC = n3 × π × r3 / 180, the arc length L is calculated AC ; where: n3 is the central angle degree of the double pinion gear (3), L AC is the arc length of AC; According to the arc length equality calculation formula: L AB = L AC , and then according to L AB = n4×π×r4 / 180, the central angle n4 (positive angle) is calculated; where: L AB is the arc length of AB.

5. The calculation method of the gear angle according to claim 4, characterized in that The step of calculating results further includes: Calculate the offset angle between the center line of the tooth groove (401) of the fourth identification point of the intermediate idler gear (4) and the second connection line (034) according to the timing angle of the intermediate idler gear (4). By analogy, all the timing angles of the whole set of gears can be calculated.

6. An accurate calculation device for the gear angle, which is used to execute the calculation method described in any one of claims 1 to 5, characterized in that, Including: The first module is used to set parameters. The second module is used to calculate results.

7. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, the steps of the calculation method described in any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the calculation method described in any one of claims 1 to 5 are implemented.

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