CN114211239B - Checking method for fit clearance between automobile transmission shaft and rear axle - Google Patents
Checking method for fit clearance between automobile transmission shaft and rear axle Download PDFInfo
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- CN114211239B CN114211239B CN202111531024.6A CN202111531024A CN114211239B CN 114211239 B CN114211239 B CN 114211239B CN 202111531024 A CN202111531024 A CN 202111531024A CN 114211239 B CN114211239 B CN 114211239B
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- spigot
- transmission shaft
- point
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012797 qualification Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- DMSMPAJRVJJAGA-UHFFFAOYSA-N benzo[d]isothiazol-3-one Chemical compound C1=CC=C2C(=O)NSC2=C1 DMSMPAJRVJJAGA-UHFFFAOYSA-N 0.000 description 6
- 230000013011 mating Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/10—Aligning parts to be fitted together
- B23P19/102—Aligning parts to be fitted together using remote centre compliance devices
- B23P19/105—Aligning parts to be fitted together using remote centre compliance devices using sensing means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Motor Power Transmission Devices (AREA)
- Automatic Assembly (AREA)
Abstract
A checking method for fit clearance between an automobile transmission shaft and a rear axle belongs to the technical field of automobile transmission systems, and comprises the steps of drawing rear axle projection lines; carrying out projection point drawing according to the forefront limit position reached by the transmission shaft when the gearbox is connected with the transmission shaft; drawing spigot projection lines at the end parts of the transmission shafts, and enabling the spigot projection lines and rear axle projection lines to be parallel to each other; the invention has the beneficial effects that the assembly clearance can be comprehensively, reliably and flexibly checked by combining the assembly process and the structural characteristics of the parts in a projection point drawing mode, the checking detection can be carried out in advance before the real vehicle assembly, the related parts are checked, the timely adjustment is carried out, the assembly qualification rate is ensured, the assembly reworking times are reduced, and the assembly efficiency is improved.
Description
Technical Field
The invention relates to the technical field of automobile transmission systems, in particular to a checking method for a fit clearance between an automobile transmission shaft and a rear axle.
Background
As shown in fig. 1 and 2, the existing transmission system of the rear axle 3 of the automobile comprises a gearbox 1, a single-section transmission shaft 2 and a rear axle 3, wherein a cross-shaft universal joint 4 at one end of the transmission shaft 2 is in spline connection with an output shaft of the gearbox 1 through a sliding fork 5, the cross-shaft universal joint 4 at the other end of the transmission shaft 2 is connected with the rear axle 3 through a flange fork 6, and the rear axle 3 moves up and down along with the up and down runout of a plate spring. The angle variation between the transmission shaft 2 and the gear box 1 and the rear axle 3 is adapted by the cross-shaft universal joint 4, and the length variation is absorbed by the engagement length variation of the spline. The flange fork 6 mating surface that is connected with the rear axle 3 has convex tang 61, sets up locating hole 62 in the tang 61, and the mating surface middle part that the rear axle 3 is connected with flange fork 6 has evagination main gear shaft 31 and constant head tank 32, and locating hole 62 and main gear shaft 31 locate fit, while tang 61 and constant head tank 32 joint cooperation.
Since the design distance between the rear axle and the gearbox is constrained. If the transmission shaft is overlong, when the rear axle falls, the arc height of the plate spring assembled on the transmission shaft can be increased, the rear axle is driven to move forward, the transmission shaft is pushed to move forward, and then factors such as dynamic backward movement of the gearbox are overlapped, the joint of the transmission shaft and the gearbox can be propped up, so that the parts are damaged, and the transmission shaft is overlong, so that the transmission shaft and the rear axle are difficult to assemble. If the transmission shaft is too short, the assembly is convenient, but when the rear axle rises, the plate spring assembled on the transmission shaft drives the rear axle to move backwards, the transmission shaft moves backwards, and then factors such as dynamic forward movement of the gearbox are overlapped, so that the meshing length of the transmission shaft and the spline of the gearbox is shortened, the minimum meshing length requirement for transmitting torque can not be met, the spline is damaged even twisted off and falls off, and the driving safety is influenced. Therefore, the length of the transmission shaft is constrained in two directions, and neither too long nor too short can meet the requirements.
Because the transmission shaft cannot be too short or too long, engineers generally only consider the top dead and pulling and dragging working conditions of the transmission shaft in the whole vehicle data during design, but do not consider the assembly state. When the transmission shaft is assembled, the rear axle is in a free state, the arc height of the plate spring is larger than the free arc height, the rear axle and the transmission shaft are driven to move forwards, and meanwhile, the main gear reduction shaft protruding outwards from the front part of the axle counteracts part of the assembly gap, so that the situation of difficult assembly can be caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a checking method for the fit clearance between a transmission shaft and a rear axle of an automobile, which uses the design position of a gearbox and the assembly position of the rear axle as checking references, combines the assembly process and the structural characteristics of parts, and can reliably check whether the fit clearance between the transmission shaft and the rear axle meets the requirements in a projection point drawing mode.
In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the checking method for the fit clearance between the automobile transmission shaft and the rear axle comprises the following steps:
step 1: drawing rear axle projection lines;
step 2: carrying out projection point drawing according to the forefront limit position reached by the transmission shaft when the gearbox is connected with the transmission shaft;
step 3: drawing spigot projection lines at the end parts of the transmission shafts, and enabling the spigot projection lines and rear axle projection lines to be parallel to each other;
step 4: and judging whether the assembly is qualified or not according to the position relation between the spigot projection line and the rear axle projection line.
The projection line of the rear axle is a connecting line between a projection point P of the lower edge of the end face of the main reduction shaft and a projection point Q of the lower edge of the matching surface of the rear axle.
The limit position of the connection of the gearbox and the transmission shaft in the step 2 is the minimum engagement length of the spline meeting the requirement of torque transmission.
The projection points obtained in the step 2 comprise a projection point C of a spline center point at the front end of the sliding fork, a projection point D of a cross-shaft universal joint midpoint at one end of the transmission shaft and a projection point E of a cross-shaft universal joint midpoint at the other end of the transmission shaft.
The method for point drawing in the step 2 is as follows: the proxel C, proxel D and proxel E are connected in sequence.
The method for drawing the spigot projection line in the step 3 is as follows:
1) Making rays perpendicular to the projection line of the rear axle through a projection point E;
2) Taking a projection point F of the midpoint of the outer end face of the spigot furthest from the midpoint of the cross shaft universal joint of the transmission shaft on rays;
3) And (5) the over-projection point F is parallel to the rear axle projection line, so as to obtain the spigot projection line.
The method for drawing the spigot projection line in the step 3 is as follows:
1) Rotating the flange fork to enable the outer end face of a spigot matched with the rear axle to be parallel to the projection line of the rear axle;
2) And drawing spigot projection lines by taking points on the outer end face of the spigot.
The spigot projection line is a projection line of the outer end face of the spigot matched with the rear axle through the flange fork.
The spigot projection line is a connecting line among an upper edge projection point M of the outer end surface of the spigot, an upper edge projection point H of the port of the positioning hole and a lower edge projection point N of the outer end surface of the spigot.
The specific judging method in the step 4 is as follows:
1) If the spigot projection line is positioned in front of the rear axle projection line and the distance between the spigot projection line and the rear axle projection line is 0-5 mm, the assembly check conclusion of the transmission shaft and the rear axle is qualified;
2) If the spigot projection line is positioned in front of the rear axle projection line, and the distance between the spigot projection line and the rear axle projection line is greater than 5mm, or the spigot projection line is positioned behind the rear axle projection line, the transmission shaft and the rear axle assembly check conclusion is unqualified.
The beneficial effects of the invention are as follows:
1. according to the invention, the design position of the gearbox and the assembly position of the rear axle are taken as check references, the mounting point of the gearbox and the projection line of the rear axle are respectively taken as front and rear fixed ends, projection is carried out according to the assembly limit position of the gearbox and the transmission shaft, the projection line of the spigot on which the outer end face of the spigot matched with the rear axle is positioned is obtained, the projection line of the spigot is parallel to the projection line of the rear axle, whether the assembly is qualified or not can be prejudged by the relative position between the projection line of the spigot and the projection line of the rear axle, the operation is convenient and quick, check detection can be carried out in advance before the assembly of the real vehicle, relevant parts are checked, timely adjustment is carried out, the assembly qualification rate is ensured, the assembly reworking times are reduced, and the assembly efficiency is improved.
2. When the projection line of the rear axle is drawn, the projection point P of the lower edge of the end face of the main reduction gear shaft and the projection point Q of the lower edge of the end face of the matching surface of the rear axle are selected as fixed points, the projection line of the projection point P and the projection point Q is connected, the projection line of the rear axle is obtained, and the projection line of the fixed point on the matching end face of the rear axle is used as a reference, so that whether the assembly is qualified can be comprehensively and reliably judged.
3. When the spigot projection line is drawn, the spigot projection line can be determined according to the condition that the spigot projection line is parallel to the rear axle projection line and the midpoint of the outer end face of the spigot which is farthest from the middle point of the cross-shaft universal joint of the transmission shaft after the drawn cross-shaft universal joint midpoint projection point E is perpendicular to the spigot projection line; the spigot projection line can also be determined by taking a point on the outer end face of the spigot when the outer end face of the spigot is parallel to the rear axle projection line according to the limit position of assembly. Through the two methods, the spigot projection line can be drawn, so that the drawing is more flexible and convenient.
In conclusion, the invention combines the assembly process and the structural characteristics of the parts, can comprehensively, reliably and flexibly check the assembly gap in a projection point drawing mode, can check and detect related parts in advance before the assembly of the real vehicle, can timely adjust the parts, ensures the assembly qualification rate, reduces the assembly reworking times and improves the assembly efficiency.
Drawings
The contents of the drawings and the marks in the drawings of the present specification are briefly described as follows:
FIG. 1 is a schematic illustration of the assembly between a drive shaft and a transmission case, rear axle, of the present invention;
FIG. 2 is a schematic view of the structure of the invention with points on the drive shaft and rear axle;
FIG. 3 is a schematic view of a feature line drawn according to the present invention;
the labels in the above figures are: 1. the transmission comprises a gearbox, a transmission shaft, a rear axle, a main reducing gear shaft, a positioning groove, a rear axle matching surface, a cross shaft universal joint, a sliding fork, a flange fork, a spigot and a positioning hole.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The specific embodiment of the invention is as follows: as shown in fig. 1 to 3, a method for checking the fit clearance between a transmission shaft and a rear axle of an automobile comprises the following steps:
step 1: and drawing projection lines of the rear axle 3.
1) Selecting a point P' of the lower edge of the end face of the main reducing gear shaft 31 to be projected on a top view (the view plane is a longitudinal symmetry plane of the vehicle) to form a projection point P;
2) Selecting a point Q' at the lower edge of the rear axle matching surface 33 to be projected on the top view to form a projection point Q;
3) Connecting the projection point P and the projection point Q to form a projection line of the rear axle 3. The projection line of the fixed point on the matching end surface of the rear axle 3 is used as a reference, so that whether the assembly is qualified can be comprehensively and reliably judged.
Step 2: the projection point is plotted according to the extreme position of the connection of the gearbox 1 and the transmission shaft 2. The limit position is the minimum engagement length of the spline of the output shaft of the gearbox 1 and the spline of the sliding fork 5, which meets the requirement of torque transmission.
1) Selecting a spline center point at the front end of the sliding fork 5 positioned at the forefront position to project on a top view to form a projection point C;
2) Selecting the midpoint of the cross shaft universal joint 4 at one end of the transmission shaft 2 to be projected on the top view to form a projection point D;
3) Selecting the midpoint of the cross shaft universal joint 4 at the other end of the transmission shaft 2 to be projected on the top view to form a projection point E;
4) The proxel C, proxel D and proxel E are connected in sequence.
Step 3: and drawing spigot projection lines of the end parts of the transmission shafts 2, and enabling the spigot projection lines and rear axle 3 projection lines to be parallel to each other. The method for drawing the spigot projection line comprises the following two steps:
one method is as follows:
1) A ray perpendicular to the projection line of the rear axle 3 is made through the projection point E;
2) Measuring the farthest distance L between the midpoint of the cross universal joint 4 of the transmission shaft 2 and the midpoint of the outer end surface of the spigot 61;
3) The point where the distance measured on the ray is L is the projection point F, which is the projection point of the midpoint of the outer end surface of the spigot 61;
4) The overspray points F are parallel to the projection line of the rear axle 3 to obtain the spigot projection line.
The other method is as follows:
1) Rotating the flange yoke 6 to enable the outer end face of the spigot 61 matched with the rear axle 3 by the flange yoke 6 to be parallel to the projection line of the rear axle 3;
2) And drawing spigot projection lines by taking points on the outer end surface of the spigot 61, wherein the spigot projection lines are projection lines of the outer end surface of the spigot 61 matched with the rear axle 3 by the flange yoke 6.
Specifically, a point M' of the upper edge of the outer end surface of the spigot 61 is selected to be projected on the top view to form a projection point M; selecting a point H' on the upper edge of the port of the positioning hole 62 to project on the top view to form a projection point H; selecting a point N' of the lower edge of the outer end surface of the spigot 61 to be projected on the top view to form a projection point N; and sequentially connecting the projection point M, the projection point H and the projection point N to form a spigot projection line.
Step 4: and judging whether the assembly is qualified or not according to the position relation between the spigot projection line and the rear axle 3 projection line.
The specific judging method comprises the following steps:
1) If the spigot projection line is positioned in front of the rear axle 3 projection line and the vertical distance between the spigot projection line and the rear axle 3 projection line is 0-5 mm, the assembly check conclusion of the transmission shaft 2 and the rear axle 3 is qualified.
2) If the spigot projection line is positioned in front of the projection line of the rear axle 3 and the distance between the spigot projection line and the projection line of the rear axle 3 is more than 5mm, or the spigot projection line is positioned behind the projection line of the rear axle 3, the assembly check conclusion of the transmission shaft 2 and the rear axle 3 is unqualified.
In conclusion, the invention combines the assembly process and the structural characteristics of the parts, can comprehensively, reliably and flexibly check the assembly gap in a projection point drawing mode, can check and detect related parts in advance before the assembly of the real vehicle, can timely adjust the parts, ensures the assembly qualification rate, reduces the assembly reworking times and improves the assembly efficiency.
The foregoing is provided by way of illustration of the principles of the present invention, and is not intended to be limited to the specific constructions and applications illustrated herein, but rather to all modifications and equivalents which may be utilized as fall within the scope of the invention as defined in the claims.
Claims (2)
1. The checking method for the fit clearance between the transmission shaft and the rear axle of the automobile is characterized by comprising the following steps of:
step 1: drawing rear axle projection lines, wherein the rear axle projection lines are connecting lines between projection points P of the lower edge of the end face of the main reduction gear shaft and projection points Q of the lower edge of the rear axle matching surface;
step 2: carrying out projection point drawing according to the forefront limit position reached by the transmission shaft when the gearbox is connected with the transmission shaft; the foremost limit position of the connection of the gearbox and the transmission shaft in the step 2 is the minimum engagement length of the spline meeting the requirement of torque transmission; the projection points obtained in the step 2 comprise a projection point C of a spline center point at the front end of the sliding fork, a projection point D of a center point of a cross-shaft universal joint at one end of the transmission shaft and a projection point E of a center point of the cross-shaft universal joint at the other end of the transmission shaft; the method for point drawing in the step 2 is as follows: sequentially connecting the projection point C, the projection point D and the projection point E;
step 3: drawing spigot projection lines at the end parts of the transmission shafts, and enabling the spigot projection lines and rear axle projection lines to be parallel to each other; the method for drawing the spigot projection line in the step 3 is as follows: 1) Making rays perpendicular to the projection line of the rear axle through a projection point E; 2) Taking a projection point F of the midpoint of the outer end face of the spigot furthest from the midpoint of the cross shaft universal joint of the transmission shaft on rays; 3) The overspray point F is made into parallel lines parallel to the rear axle projection line, so that the spigot projection line is obtained;
step 4: judging whether the assembly is qualified or not according to the position relation between the spigot projection line and the rear axle projection line; the specific judging method in the step 4 is as follows: 1) If the spigot projection line is positioned in front of the rear axle projection line and the distance between the spigot projection line and the rear axle projection line is 0-5 mm, the assembly check conclusion of the transmission shaft and the rear axle is qualified; 2) If the spigot projection line is positioned in front of the rear axle projection line, and the distance between the spigot projection line and the rear axle projection line is greater than 5mm, or the spigot projection line is positioned behind the rear axle projection line, the transmission shaft and the rear axle assembly check conclusion is unqualified.
2. The checking method for the fit clearance between the transmission shaft and the rear axle of the automobile is characterized by comprising the following steps of:
step 1: drawing rear axle projection lines, wherein the rear axle projection lines are connecting lines between projection points P of the lower edge of the end face of the main reduction gear shaft and projection points Q of the lower edge of the rear axle matching surface;
step 2: carrying out projection point drawing according to the forefront limit position reached by the transmission shaft when the gearbox is connected with the transmission shaft; the foremost limit position of the connection of the gearbox and the transmission shaft in the step 2 is the minimum engagement length of the spline meeting the requirement of torque transmission; the projection points obtained in the step 2 comprise a projection point C of a spline center point at the front end of the sliding fork, a projection point D of a center point of a cross-shaft universal joint at one end of the transmission shaft and a projection point E of a center point of the cross-shaft universal joint at the other end of the transmission shaft; the method for point drawing in the step 2 is as follows: sequentially connecting the projection point C, the projection point D and the projection point E;
step 3: drawing spigot projection lines at the end parts of the transmission shafts, and enabling the spigot projection lines and rear axle projection lines to be parallel to each other; the method for drawing the spigot projection line in the step 3 is as follows: 1) Rotating the flange fork to enable the outer end face of a spigot matched with the rear axle to be parallel to the projection line of the rear axle; 2) Drawing spigot projection lines by taking points on the outer end face of the spigot; the spigot projection line is a projection line of the outer end face of the spigot matched with the rear axle by the flange fork, and is a connecting line among an upper edge projection point M of the outer end face of the spigot, an upper edge projection point H of a port of the positioning hole and a lower edge projection point N of the outer end face of the spigot;
step 4: judging whether the assembly is qualified or not according to the position relation between the spigot projection line and the rear axle projection line; the specific judging method in the step 4 is as follows: 1) If the spigot projection line is positioned in front of the rear axle projection line and the distance between the spigot projection line and the rear axle projection line is 0-5 mm, the assembly check conclusion of the transmission shaft and the rear axle is qualified; 2) If the spigot projection line is positioned in front of the rear axle projection line, and the distance between the spigot projection line and the rear axle projection line is greater than 5mm, or the spigot projection line is positioned behind the rear axle projection line, the transmission shaft and the rear axle assembly check conclusion is unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111531024.6A CN114211239B (en) | 2021-12-14 | 2021-12-14 | Checking method for fit clearance between automobile transmission shaft and rear axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111531024.6A CN114211239B (en) | 2021-12-14 | 2021-12-14 | Checking method for fit clearance between automobile transmission shaft and rear axle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114211239A CN114211239A (en) | 2022-03-22 |
| CN114211239B true CN114211239B (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111531024.6A Active CN114211239B (en) | 2021-12-14 | 2021-12-14 | Checking method for fit clearance between automobile transmission shaft and rear axle |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2121141C1 (en) * | 1996-10-03 | 1998-10-27 | Красноярский государственный технический университет | Method determining displacement of axles of motor vehicles |
| CN103659465A (en) * | 2012-09-21 | 2014-03-26 | 财团法人工业技术研究院 | compensation control method for multi-axis machine |
| CN106568406A (en) * | 2016-11-08 | 2017-04-19 | 长安大学 | FSAE racing car semiaxis length determination and bounce checking method |
| CN113503838A (en) * | 2021-06-04 | 2021-10-15 | 东风柳州汽车有限公司 | Truck central axis offset measurement method |
-
2021
- 2021-12-14 CN CN202111531024.6A patent/CN114211239B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2121141C1 (en) * | 1996-10-03 | 1998-10-27 | Красноярский государственный технический университет | Method determining displacement of axles of motor vehicles |
| CN103659465A (en) * | 2012-09-21 | 2014-03-26 | 财团法人工业技术研究院 | compensation control method for multi-axis machine |
| CN106568406A (en) * | 2016-11-08 | 2017-04-19 | 长安大学 | FSAE racing car semiaxis length determination and bounce checking method |
| CN113503838A (en) * | 2021-06-04 | 2021-10-15 | 东风柳州汽车有限公司 | Truck central axis offset measurement method |
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| Publication number | Publication date |
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| CN114211239A (en) | 2022-03-22 |
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