CN114261463B - Method for selecting transverse power assembly to carry hard points quickly - Google Patents
Method for selecting transverse power assembly to carry hard points quickly Download PDFInfo
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- CN114261463B CN114261463B CN202111541004.7A CN202111541004A CN114261463B CN 114261463 B CN114261463 B CN 114261463B CN 202111541004 A CN202111541004 A CN 202111541004A CN 114261463 B CN114261463 B CN 114261463B
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Abstract
The invention discloses a method for selecting a quick carrying hard point of a transverse power assembly, which comprises the following steps: step 1: acquiring a position of a center point C of a left front wheel of the whole machine; step 2: determining the region of an intersection point B between the output of the gearbox and the mounting surface of the clutch shell according to the requirement of the included angle of the transmission shaft by preparing a left front wheel center point C; and 3, step 3: and determining the specific position of the intersection point B of the output of the gearbox and the mounting surface of the clutch shell through the intersection point A of the crankshaft and the mounting surface of the engine and the gearbox and the center point C of the prepared left front wheel. When the power assembly is carried and analyzed, the hard points do not need to be adjusted repeatedly, and the aim of improving the working efficiency is fulfilled.
Description
Technical Field
The invention relates to the technical field of power assembly carrying analysis, in particular to a method for selecting a transverse power assembly rapid carrying hard point.
Background
The establishment of the hard points (the arrangement positions of an engine and a gearbox) of the power assembly is the beginning of the arrangement work of the cabin of the overall arrangement of the whole vehicle, the selection of the appropriate hard points of the power assembly can greatly improve the working efficiency of the subsequent cabin arrangement, and the conventional method in the aspect of the arrangement of the hard points of the power assembly is as follows: firstly, determining a preliminary placement position by taking a geometric clearance as a guide; then, checking a transmission included angle; and finally, checking the performance and the function.
In the conventional method for arranging the hard points of the power assembly, the position of the power assembly moves without any reference frame and reference points, the position is repeatedly moved, and the situation of repeated work exists, so that the hard points of the power assembly which is wanted to be obtained cannot be obtained at one time.
Disclosure of Invention
The invention aims to provide a method for selecting a transverse power assembly rapid carrying hard point.
In order to realize the purpose, the invention discloses a method for selecting a quick carrying hard point of a transverse power assembly, which is characterized by comprising the following steps:
step 1: acquiring a position of a prepared left front wheel center point C, wherein the coordinate of the prepared left front wheel center point C on an X axis of a vehicle coordinate system is a coordinate origin, the coordinate of the prepared left front wheel center point C on a Z axis of the vehicle coordinate system is the coordinate origin, and the coordinate of the prepared left front wheel center point C on a Y axis of the vehicle coordinate system is a coordinate point corresponding to a half position of the distance between the centers of two tires of a front wheel, wherein the X axis is a vehicle front and rear direction coordinate axis, the Z axis is a vehicle up and down direction coordinate axis, and the Y axis is a vehicle left and right direction coordinate axis;
step 2: determining the region of an intersection point B between the output of the gearbox and the mounting surface of the clutch shell according to the requirement of the included angle of the transmission shaft by preparing a left front wheel center point C;
and step 3: and determining the specific position of the intersection point B of the output of the gearbox and the mounting surface of the clutch shell through the intersection point A of the crankshaft and the mounting surface of the engine and the gearbox and the center point C of the prepared left front wheel.
The invention has the beneficial effects that:
1. the moving principle of the characteristic triangle method adopted by the invention is clear, and the method can shorten the hard spot arrangement working time by more than 50%;
2. the moving principle of the characteristic triangle method adopted by the invention has high satisfaction rate, and the arrangement scheme utilizes the interrelation of A, B, C to summarize the performance, geometry and functional relation related to the arrangement. And a large amount of competitive product analysis data support can better support related conclusions. The satisfaction rate of performance, geometry and function of hard points arranged by the method reaches more than 90%.
Drawings
FIG. 1 is a diagram illustrating the definition of an intersection A, an intersection B and an intersection C according to the present invention;
FIG. 2 is a schematic diagram of a feature triangle of a Y-plane coordinate system according to the present invention;
fig. 3 is a schematic diagram of a representative moving position strategy of the intersection point a and the intersection point B.
FIG. 3 uses a centralized triangle measurement as a trending reference for the placement of A, B, C points to provide guidance.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the method for selecting the transverse power assembly rapid carrying hard point as shown in fig. 1-3 comprises the following steps:
step 1: acquiring a position of a servicing left front wheel center point C (the position of a wheel center in a servicing empty state), wherein a coordinate of the servicing left front wheel center point C on an X axis of a vehicle coordinate system is a coordinate origin, a coordinate of the servicing left front wheel center point C on a Z axis of the vehicle coordinate system is the coordinate origin, and a coordinate of the servicing left front wheel center point C on a Y axis of the vehicle coordinate system is a coordinate point corresponding to a half position of the distance between two tire centers of a front wheel, wherein the X axis is a vehicle front and rear direction coordinate axis, the Z axis is a vehicle up and down direction coordinate axis, and the Y axis is a vehicle left and right direction coordinate axis;
and 2, step: determining the region of an intersection point B between the output of the gearbox and the mounting surface of the clutch shell according to the requirement of the included angle of the transmission shaft by preparing a left front wheel center point C;
and step 3: the specific position of the intersection point B of the output of the gearbox and the mounting surface of the clutch shell is determined by utilizing a characteristic triangle principle and a B-point sector region principle through the intersection point A of the crankshaft, the engine and the mounting surface of the gearbox and the center point C of the prepared left front wheel.
In the technical scheme, based on the point C (the central point of the tire) as the origin of coordinates, a plane rectangular coordinate is drawn on the plane Y, and the positive X direction of the coordinate system is the tail direction of the vehicle
The area of the intersection point B between the output of the gearbox and the mounting surface of the clutch shell meets the following formula:
for cars (Sedan): (Xb-Xc)2+(Zb-Zc)2≤M
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N
Wherein Xb is the coordinate of the whole vehicle coordinate system X axis of the intersection point B of the gearbox output and the mounting surface of the clutch shell, xc is the coordinate of the whole vehicle coordinate system X axis of the servicing left front wheel center point C, zb is the coordinate of the whole vehicle coordinate system Z axis of the intersection point B of the gearbox output and the mounting surface of the clutch shell, zc is the coordinate of the whole vehicle coordinate system Z axis of the servicing left front wheel center point C, M is a threshold value aiming at a car, N is a threshold value aiming at an SUV, M takes a value of 25mm, and N takes a value of 45mm.
As shown in fig. 2, the region to which the intersection B belongs is a sector region in the figure;
in the above technical solution, in step 3, the distance between the intersection point a of the crankshaft and the mounting surface of the engine and the transmission and the intersection point B of the output of the transmission and the mounting surface of the clutch housing is a fixed value of the transmission, the same distance between the intersection point a of the transmission and the intersection point B is constant, the adjustment of the intersection point a and the intersection point B affect each other, and the intersection point a and the intersection point B move on a Y plane (a plane perpendicular to the Y axis in a three-dimensional space, also referred to as an XZ plane).
In the above technical solution, in step 3, after a known power assembly hard point is found in the same platform, the adjustment mode for carrying a new power assembly intersection point a and an intersection point B is as follows:
for the conditions of the same engine and different gearboxes, the coordinate of the intersection point A and the coordinate of the intersection point A of the known power assembly in the same platform are preferentially ensured to be unchanged, and then the intersection point B is adjusted to meet the following requirements:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N。
In step 3 of the above technical solution, for the same engine and different gearboxes, if the center distance difference between the new powertrain gearbox and the known powertrain gearbox is greater than 10mm, or the DIFF DROP suggested difference between the new powertrain gearbox and the known powertrain gearbox is greater than 10mm, continuing to adjust the intersection point a on the basis of adjusting the intersection point B to satisfy the intersection point B, where the center distance of the gearbox is an axial gap between an input shaft and an output shaft of the gearbox, and the DIFF DROP value is a Z-direction height difference between the input shaft and the output shaft after the gearbox is completely arranged:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N；
Meanwhile, the clearance between the engine of the new power assembly and peripheral parts meets the design requirement.
In step 3 of the above technical scheme, after a power assembly hard point is known in the same platform, an adjustment mode for carrying a new power assembly intersection point a and an intersection point B is as follows:
and for different engines and the same gearbox, the coordinate of the intersection point B and the coordinate of the known power assembly intersection point B in the same platform are not changed, and the parts connected with the gearbox are universal.
In step 3 of the above technical solution, for different engines and the same transmission case, if the dimension difference between the new powertrain engine and the known powertrain engine in the front-rear direction is more than 10mm, the intersection point a is adjusted, and because the distance value between the intersection point a and the intersection point B of the same transmission case is constant, the adjustment of the intersection point a will cause the intersection point B to follow the adjustment, so that the intersection point B satisfies:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N；
Meanwhile, the clearance between the engine of the new power assembly and peripheral parts meets the design requirement.
In step 3 of the above technical scheme, for different engines and different gearboxes, the X-axis and Z-axis coordinates of the intersection point B are preferentially ensured to be unchanged, and the Y-axis coordinate position of the intersection point B is adjusted to make the intersection point B satisfy the following conditions:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N。
In step 3 of the above technical solution, for different engines and different gearboxes, if the center distance difference between the new powertrain gearbox and the known powertrain gearbox is 10mm or more, or the DIFF DROP suggested difference between the new powertrain gearbox and the known powertrain gearbox is 10mm or more, or the dimension difference between the new powertrain engine and the known powertrain engine in the front-back direction is 10mm or more, the intersection point a is adjusted on the basis of adjusting the Y-axis coordinate position of the intersection point B, so that the intersection point B satisfies:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N；
Meanwhile, the clearance between the engine of the new power assembly and peripheral parts meets the design requirement.
According to the invention, a large number of experiments verify that the point B of the intersection point falls in the area, the one-time satisfaction rate is very high, and the hard point of the power assembly meeting the requirement of the transmission included angle can be quickly found by adopting the method, so that the transmission efficiency of the transmission shaft is ensured, and the NVH problem is avoided.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (10)
1. A transverse power assembly rapid carrying hard point selection method is characterized by comprising the following steps:
step 1: acquiring a position of a prepared left front wheel center point C, wherein the coordinate of the prepared left front wheel center point C on an X axis of a vehicle coordinate system is a coordinate origin, the coordinate of the prepared left front wheel center point C on a Z axis of the vehicle coordinate system is the coordinate origin, and the coordinate of the prepared left front wheel center point C on a Y axis of the vehicle coordinate system is a coordinate point corresponding to a half position of the distance between the centers of two tires of a front wheel, wherein the X axis is a vehicle front and rear direction coordinate axis, the Z axis is a vehicle up and down direction coordinate axis, and the Y axis is a vehicle left and right direction coordinate axis;
step 2: determining the region of an intersection point B between the output of the gearbox and the mounting surface of the clutch shell according to the requirement of the included angle of the transmission shaft by preparing a left front wheel center point C;
and step 3: and determining the specific position of the intersection point B of the output of the gearbox and the mounting surface of the clutch shell through the intersection point A of the crankshaft and the mounting surface of the engine and the gearbox and the center point C of the prepared left front wheel.
2. The transverse power assembly rapid embarkation hard spot selection method according to claim 1, characterized in that: the area of the intersection point B between the output of the gearbox and the mounting surface of the clutch shell meets the following formula:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N
Wherein Xb is the coordinate of the whole vehicle coordinate system X axis of the intersection point B of the transmission output and the clutch housing mounting surface, xc is the coordinate of the whole vehicle coordinate system X axis of the prepared left front wheel center point C, zb is the coordinate of the whole vehicle coordinate system Z axis of the intersection point B of the transmission output and the clutch housing mounting surface, zc is the coordinate of the whole vehicle coordinate system Z axis of the prepared left front wheel center point C, M is the threshold value aiming at the car, and N is the threshold value aiming at the SUV.
3. The transverse power assembly rapid embarkation hard spot selection method according to claim 1, characterized in that: in the step 3, the distance between the intersection point A of the crankshaft and the mounting surface of the engine and the gearbox and the intersection point B of the output of the gearbox and the mounting surface of the clutch shell is a fixed value of the gearbox, the same distance value between the intersection point A of the gearbox and the intersection point B is constant, the adjustment of the intersection point A and the adjustment of the intersection point B influence each other, and the intersection point A and the intersection point B move on the Y plane.
4. The method of claim 3 for selecting a hard spot for rapid pick-up of a transverse powertrain, wherein the method comprises: in the step 3, after a power assembly hard point is known in the same platform, an adjustment mode for carrying a new power assembly intersection point a and an intersection point B is as follows:
for the conditions of the same engine and different gearboxes, the coordinate of the intersection point A and the coordinate of the intersection point A of the known power assembly in the same platform are preferentially ensured to be unchanged, and then the intersection point B is adjusted to meet the following requirements:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N；
Wherein Xb is the coordinate of the whole vehicle coordinate system X axis of the intersection point B of the gearbox output and the mounting surface of the clutch housing, xc is the coordinate of the whole vehicle coordinate system X axis of the servicing left front wheel center point C, zb is the coordinate of the whole vehicle coordinate system Z axis of the intersection point B of the gearbox output and the mounting surface of the clutch housing, zc is the coordinate of the whole vehicle coordinate system Z axis of the servicing left front wheel center point C, M is a threshold value aiming at a car, and N is a threshold value aiming at an SUV.
5. The method of claim 4 for selecting a transverse powertrain fast pick-up hard spot, comprising: in step 3, for the same engine and different gearboxes, if the difference between the center distances of the new powertrain gearbox and the known powertrain gearbox is greater than the preset value P, or the difference between the proposed DIFF DROP of the new powertrain gearbox and the known powertrain gearbox is greater than the preset value Q, continuing to adjust the intersection point a on the basis of adjusting the intersection point B to make the intersection point B satisfy:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N；
Meanwhile, the clearance between the engine of the new power assembly and peripheral parts meets the design requirement.
6. The method of claim 4 for selecting a transverse powertrain fast pick-up hard spot, comprising: in the step 3, after a power assembly hard point is known in the same platform, an adjustment mode for carrying a new power assembly intersection point a and an intersection point B is as follows:
and for different engines and the same gearbox, the coordinate of the intersection point B and the coordinate of the known power assembly intersection point B in the same platform are ensured to be unchanged.
7. The transverse power assembly rapid embarkation hard spot selection method according to claim 6, characterized in that: in step 3, for different engines and the same transmission case, if the dimension difference between the new powertrain engine and the known powertrain engine in the front-back direction is more than 10mm, the intersection point a is adjusted, and since the distance value between the intersection point a and the intersection point B of the same transmission case is constant, the adjustment of the intersection point a can cause the intersection point B to follow the adjustment, so that the intersection point B satisfies:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N；
Meanwhile, the clearance between the engine of the new power assembly and peripheral parts meets the design requirement.
8. The transverse power assembly rapid embarkation hard spot selection method according to claim 6, characterized in that: in the step 3, for different engines and different gearboxes, the X-axis coordinate and the Z-axis coordinate of the intersection point B are preferentially ensured to be unchanged, and the Y-axis coordinate position of the intersection point B is adjusted to make the intersection point B satisfy the following conditions:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N。
9. The method of claim 8 for rapid pick-up of hard spots on a transverse powertrain, wherein: in step 3, for different engines and different gearboxes, if the difference between the center distances of the new powertrain gearbox and the known powertrain gearbox is greater than a preset value P, or the difference between the DIFF DROP recommendation of the new powertrain gearbox and the known powertrain gearbox is greater than a preset value Q, or the difference between the sizes of the new powertrain engine and the known powertrain engine in the front-back direction is greater than 10mm, the intersection point a is adjusted on the basis of adjusting the Y-axis coordinate position of the intersection point B, so that the intersection point B satisfies the following conditions:
for a car: (Xb-Xc)2+(Zb-Zc)2≤M；
For the SUV: (Xb-Xc)2+(Zb-Zc)2≤N；
Meanwhile, the clearance between the engine of the new power assembly and the peripheral parts meets the design requirement.
10. The method for selecting a transverse powertrain rapid embarkation hard spot according to claim 2, characterized in that: the value of M is 25mm, and the value of N is 45mm.
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| DE102010000777A1 (en) * | 2010-01-11 | 2011-07-14 | Ford Global Technologies, LLC, Mich. | Method for mounting a body component to a body shell and holder |
| GB2527589B (en) * | 2014-06-27 | 2016-12-28 | Gordon Murray Design Ltd | Vehicle chassis structures |
| CN105718607B (en) * | 2014-12-02 | 2019-02-19 | 广州汽车集团股份有限公司 | A kind of suspension hard spot optimization method based on K&C characteristic |
| CN106032154B (en) * | 2016-05-23 | 2019-03-12 | 奇瑞汽车股份有限公司 | The method and apparatus for determining automobile power assembly installation site |
| CN106644528B (en) * | 2017-02-27 | 2023-02-10 | 吉林大学 | Device for realizing quick connection between frame vehicle body and different suspensions and design method |
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