CN114771244A - Adjusting method and adjusting device for transmission shaft intermediate support - Google Patents

Adjusting method and adjusting device for transmission shaft intermediate support Download PDF

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Publication number
CN114771244A
CN114771244A CN202210415653.0A CN202210415653A CN114771244A CN 114771244 A CN114771244 A CN 114771244A CN 202210415653 A CN202210415653 A CN 202210415653A CN 114771244 A CN114771244 A CN 114771244A
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China
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transmission shaft
shaft
coordinate
included angle
universal joint
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王万青
高扬
申彬
梁福顺
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China National Heavy Duty Truck Group Jinan Power Co Ltd
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China National Heavy Duty Truck Group Jinan Power Co Ltd
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Priority to CN202210415653.0A priority Critical patent/CN114771244A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
    • B60K17/24—Arrangements of mountings for shafting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Motor Power Transmission Devices (AREA)

Abstract

The application discloses an adjusting method and an adjusting device for a transmission shaft intermediate bearing, wherein the method comprises the following steps: acquiring the up-down displacement of the rear drive axle, and converting the up-down displacement into an input axis upper point coordinate, an output axis upper point coordinate, a universal joint cross shaft central point coordinate and an included angle between the plane of each universal joint driving fork and the vertical plane of the driving shaft axis; calculating to obtain an equivalent included angle of the current transmission shaft by using a formula; changing a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft for multiple times according to a set variable, and determining the changed equivalent included angle of the transmission shaft system one by one according to the set variable; comparing equivalent included angles of a plurality of transmission shafting, and determining an optimal z-direction coordinate value; and adjusting the position of the current middle bearing of the transmission shaft according to the optimal z-direction coordinate value. The adjusting device comprises: hydraulic pressure lift module, displacement sensor and control module. Through the method and the device, the accuracy and flexibility of adjustment and control of the equivalent included angle of the transmission shaft can be improved.

Description

Adjusting method and adjusting device for transmission shaft intermediate support
Technical Field
The application relates to the technical field of chassis transmission shafts of commercial vehicles, in particular to an adjusting method and an adjusting device for a middle support of a transmission shaft.
Background
In the technical field of chassis transmission shafts of commercial vehicles, a universal joint with a cross shaft is widely applied due to high reliability, low cost and high application range. In a transmission shaft including a universal joint, the parameter for comprehensively evaluating the arrangement of the transmission shaft is the equivalent included angle. When the transmission equivalent included angle of the universal joint is not zero, the rotating speed of the transmission shaft fluctuates, and meanwhile, the action of the bending moment of the fluctuation accessory is generated on the transmission shaft. The fluctuation of the rotation speed may cause gear mesh shock and noise of the transmission system, thereby affecting the reliability of the transmission shaft. Additional bending moments can also cause vibration and noise in the equipment or vehicle. The equivalent included angle is realized by adjusting the middle support of the transmission shaft, so that how to design an adjusting device for the middle support of the transmission shaft is an important technical problem.
The most current adjustment devices for the intermediate bearing of a drive shaft are passive structures, such as: the up-down adjustment of the middle support is adjusted through the length of the angle plate, so that the adjustment of the middle support of the transmission shaft is realized.
However, in the existing adjusting device for the intermediate support of the transmission shaft, the passive structure cannot be adjusted and adapted along with the change of load working conditions after being installed, so that the adjusting and controlling accuracy of the device on the equivalent included angle of the transmission shaft is poor, and the problem that the equivalent included angle of the transmission shaft is increased due to different loads cannot be well solved.
Disclosure of Invention
The application provides an adjusting method and an adjusting device for a transmission shaft intermediate bearing, and aims to solve the problem that in the prior art, the adjusting device for the transmission shaft intermediate bearing is of a passive structure and has poor accuracy in adjusting and controlling an equivalent included angle.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
an adjustment method for a propeller shaft intermediate bearing, the adjustment method being applied to a commercial vehicle chassis propeller shaft, the adjustment method comprising:
defining the power transmission direction of the chassis transmission shaft of the commercial vehicle as the x-axis direction, forming a transmission shaft system by n transmission shafts, and forming a driving shaft system by a driving shaft and a corresponding driven shaftThe shaft forms any universal joint, and the plane of the driving shaft universal joint fork is BiThe plane of the driven shaft universal joint fork is Bi+1The vertical plane of the axis of the driving shaft is AiThe vertical plane of the driven shaft axis is Ai+1The center coordinate of each universal joint cross shaft is (x)i，yi，zi) Plane B of driving fork of each universal jointiPerpendicular plane A to the axis of the driving shaftiAngle between them is betaiWherein the number of the driving shafts is the same as that of the universal joints;
acquiring the up-down displacement of a rear drive axle, and converting the displacement into an upper point coordinate of an input axis, an upper point coordinate of an output axis, a central point coordinate of each universal joint cross shaft and an included angle between a plane of each universal joint driving fork and a vertical plane of a driving shaft axis;
according to the coordinates of the upper point of the input axis, the coordinates of the upper point of the output axis, the coordinates of the central point of the cross shaft of each universal joint and the included angle between the plane of the driving fork of each universal joint and the vertical plane of the axis of the driving shaft, a formula is utilized
Figure BDA0003605808830000021
Calculating to obtain the equivalent included angle theta of the current transmission shafteWherein, θiIs the angle between the driving shaft and the driven shaft on both sides of the ith universal joint, alphaiIs the initial phase angle of the ith universal joint, n is the number of transmission shafts, and thetai＝arccos(si-1·si)，SiIs the unit vector of the axis of the ith transmission shaft, an
Figure BDA0003605808830000022
liIs the length of the transmission shaft of the ith transmission shaft, an
Figure BDA0003605808830000023
Initial phase of ith gimbal
Figure BDA0003605808830000024
Wherein the content of the first and second substances,
Figure BDA0003605808830000025
for determining the sign of positive or negative, along the x-axis, according to the right-hand rule, leading is positive, leading is negative, and NiIs a unit normal vector of a plane in which the ith universal joint driving shaft and the ith universal joint driven shaft are positioned, and
Figure BDA0003605808830000026
tiis the unit vector of the ith gimbal active fork plane normal, and ti＝[0 cosβi sinβi]T；
Changing a z-direction coordinate value in the coordinate of the central point of the middle support of the transmission shaft for a plurality of times according to a set variable, and determining the equivalent included angle of a transmission shaft system after the z-direction coordinate value in the coordinate of the central point of the middle support of the transmission shaft is changed one by one according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft;
comparing the equivalent included angles of the plurality of transmission shafts, determining a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft matched with the minimum equivalent included angle of the transmission shaft, and defining the z-direction coordinate value as the optimal z-direction coordinate value of the current transmission shaft;
and adjusting the position of the current middle support of the transmission shaft according to the optimal z-direction coordinate value.
Optionally, the changing the z-coordinate value in the coordinate of the middle support center point of the transmission shaft for a plurality of times according to the set variable, and determining the equivalent included angle of the transmission shaft system after the z-coordinate value in the coordinate of the middle support center point of the transmission shaft is changed one by one according to the set variable, the connection position between the middle support of the transmission shaft and the transmission shaft, includes:
changing a z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft according to a set variable;
according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft, determining the coordinate of an upper point of an input axis, the coordinate of an upper point of an output axis, the coordinate of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the middle support of the transmission shaft in the z direction is changed;
calculating to obtain a first equivalent included angle of the current transmission shaft according to the coordinate of a point on an input axis, the coordinate of a point on an output axis, the coordinate of the center point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the z direction in the coordinate of the middle support center point of the transmission shaft is changed;
and changing the z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft again according to the set variable, and sequentially calculating to obtain a second equivalent included angle and a third equivalent included angle until an Mth equivalent included angle, wherein M is a natural number and is more than or equal to 2.
Optionally, the adjustment method is applied when the vehicle is started and when the gearbox is in neutral.
Optionally, before adjusting the position of the current propeller shaft intermediate bearing according to the optimal z-coordinate value, the method further includes:
the adjustment mode switch is turned on.
An adjustment device for a propeller shaft intermediate bearing, the adjustment device being applied to a commercial vehicle chassis propeller shaft, the adjustment device comprising: the hydraulic lifting device comprises a hydraulic lifting module, a displacement sensor and a control module, wherein a transmission shaft middle support is arranged on a transmission shaft, the hydraulic lifting module is arranged between the transmission shaft middle support and a frame front cross beam, the displacement sensor is arranged at the bottom of a frame rear cross beam, and the control module is arranged in a cab instrument desk;
the displacement sensor is used for measuring the upper and lower displacement of the rear drive axle and converting the displacement into an upper point coordinate of an input axis, an upper point coordinate of an output axis, a central point coordinate of each universal joint cross shaft and an included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft;
the control module is used for changing the z-direction coordinate value of the middle support central point coordinate at virtual equal intervals according to the measurement result of the displacement sensor, and determining the optimal z-direction coordinate value of the current transmission shaft, wherein the optimal z-direction coordinate value is the z-direction coordinate value of the middle support central point coordinate of the transmission shaft matched with the minimum transmission shaft system equivalent included angle;
and the hydraulic lifting module is used for adjusting the position of the current middle support of the transmission shaft according to the optimal z-direction coordinate value.
Optionally, the control module comprises:
the equivalent included angle calculation unit is used for utilizing a formula according to the coordinates of the upper point of the input axis, the coordinates of the upper point of the output axis, the coordinates of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft
Figure BDA0003605808830000031
Calculating to obtain the equivalent included angle theta of the current transmission shafteWherein, θiIs the angle between the driving shaft and the driven shaft on both sides of the ith universal joint, alphaiIs the initial phase angle of the ith universal joint, n is the number of transmission shafts, and thetai＝arccos(si-1·si)，SiIs the unit vector of the axis of the ith transmission shaft, an
Figure BDA0003605808830000041
liIs the length of the transmission shaft of the ith transmission shaft, an
Figure BDA0003605808830000042
Initial phase of ith gimbal
Figure BDA0003605808830000043
Wherein the content of the first and second substances,
Figure BDA0003605808830000044
is used for determining positive and negative signs, and is determined by the right hand rule along the x-axis direction, wherein the leading direction is positive, the trailing direction is negative, and N isiIs a unit normal vector of a plane in which the ith universal joint driving shaft and the ith universal joint driven shaft are positioned, and
Figure BDA0003605808830000045
tiis the unit vector of the ith gimbal active fork plane normal, and ti＝[0 cosβi sinβi]T；
The variable setting unit is used for changing a z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft for multiple times according to a set variable;
the equivalent included angle calculating unit is further used for determining the equivalent included angle of the transmission shaft system after the Z-direction coordinate value in the coordinate of the central point of the middle support of the transmission shaft is changed one by one according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft;
and the optimal z-direction coordinate value determining unit is used for comparing the multiple transmission shafting equivalent included angles, determining a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft matched with the minimum transmission shafting equivalent included angle, and defining the z-direction coordinate value as the optimal z-direction coordinate value of the current transmission shaft.
Optionally, the equivalent included angle calculating unit includes:
the parameter calculation subunit is used for determining the coordinate of an upper point of an input axis, the coordinate of an upper point of an output axis, the coordinate of a central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the z direction in the coordinate of the central point of the middle support of the transmission shaft is changed according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft;
the first equivalent included angle calculating subunit is used for calculating a first equivalent included angle of the current transmission shaft according to the coordinate of the upper point of the input axis, the coordinate of the upper point of the output axis, the coordinate of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the z direction in the coordinate of the middle supporting central point of the transmission shaft is changed;
and the Mth equivalent included angle calculating subunit is also used for changing a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft according to the set variable again, and then sequentially calculating to obtain a second equivalent included angle and a third equivalent included angle until the Mth equivalent included angle, wherein M is a natural number and is more than or equal to 2.
Optionally, a first connecting plate and a second connecting plate are further arranged in the adjusting device, the transmission shaft intermediate bearing is connected with the hydraulic lifting module through the first connecting plate, and the hydraulic lifting module is connected with the frame front cross beam through the second connecting plate.
Optionally, the hydraulic lift module comprises: the hydraulic lifting mechanism comprises a hydraulic valve, a hydraulic lifting body and a hydraulic lifting arm, wherein a connecting hole is formed in the hydraulic lifting arm, the transmission shaft intermediate bearing is fixedly connected with the hydraulic lifting body through a bolt via the first connecting plate and the connecting hole, the hydraulic lifting body is fixedly connected with a frame front cross beam through a second connecting plate via the bolt, and the hydraulic valve is used for controlling the hydraulic lifting body to adjust a z-direction coordinate in a transmission shaft intermediate bearing central point coordinate according to an optimal z-direction coordinate value determined by a control module.
Optionally, the lifting stroke of the hydraulic lifting module is 0-60 mm.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the method comprises the steps of firstly defining relevant parameters, obtaining the up-down displacement of a rear drive axle, and converting the displacement into an input axis upper point coordinate, an output axis upper point coordinate, universal joint cross shaft central point coordinates and an included angle between a universal joint driving fork plane and a driving shaft axis vertical plane; secondly, calculating an equivalent included angle theta of the current transmission shaft by using a formula according to the coordinates of the upper point of the input axis, the coordinates of the upper point of the output axis, the coordinates of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shafte(ii) a Then changing a z-coordinate value in the coordinate of the central point of the middle support of the transmission shaft for a plurality of times according to a set variable, and determining the equivalent included angle of a transmission shaft system after the z-coordinate value in the coordinate of the central point of the middle support of the transmission shaft is changed one by one according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft; and finally, comparing the equivalent included angles of the plurality of transmission shafts, determining a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft matched with the minimum equivalent included angle of the transmission shafts, and adjusting the position of the middle support of the current transmission shaft according to the z-direction coordinate value. The embodiment can timely acquire the up-down displacement of the rear drive axle, convert the up-down displacement into the related parameters for calculating the equivalent included angle of the current transmission shaft, and accurately acquire the up-down displacement in time for subsequently calculating the equivalent included angle of the transmission shaft system,The z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft provides a reliable basis, and the accuracy of adjusting the middle support position of the transmission shaft is improved. According to the method, the z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft is changed for multiple times according to the set variable, the corresponding equivalent included angle of the transmission shaft system is calculated, the equivalent included angles of the transmission shaft systems are compared finally, the z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft matched with the minimum equivalent included angle of the transmission shaft system is determined, the z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft acquired by the method is used for adjusting the current middle support position of the transmission shaft, the problem that the equivalent included angle of the transmission shaft is increased due to different loads can be solved, and the accuracy of adjustment and control of the equivalent included angle of the transmission shaft is improved.
The application also provides an adjusting device for a transmission shaft intermediate bearing, which is used for a commercial vehicle chassis transmission shaft and mainly comprises: the hydraulic lifting device comprises a hydraulic lifting module, a displacement sensor and a control module, wherein the middle of a transmission shaft is supported on the transmission shaft. The hydraulic lifting module is arranged between the middle support of the transmission shaft and the front cross beam of the frame, and the displacement sensor is arranged at the bottom of the rear cross beam of the frame. In the embodiment, the up-down displacement of the rear drive axle is measured by the displacement sensor, then the control module is used for changing the z-direction coordinate value of the central point coordinate of the middle support at virtually equal intervals according to the measurement result of the displacement sensor, the optimal z-direction coordinate value of the current transmission shaft is determined, and finally the hydraulic lifting module is used for adjusting the position of the middle support of the current transmission shaft according to the optimal z-direction coordinate value, so that the middle support of the transmission shaft is accurately adjusted. In the embodiment, the control module, the hydraulic lifting module and the displacement sensor are cooperatively used, and the displacement sensor is arranged at the bottom of the rear cross beam of the frame, so that the upper displacement and the lower displacement of the rear drive axle can be timely and accurately acquired. The control module can utilize the hydraulic lifting module to adjust the position of the middle support of the transmission shaft in time through adjustment and comparison according to the up-down displacement. Compared with the prior art, the control module, the hydraulic lifting module and the displacement sensor are of an active structure, after the transmission shaft intermediate bearing is installed, when the load working condition changes, the hydraulic lifting module can readjust the z-direction coordinate value in the coordinate of the transmission shaft intermediate bearing central point according to the up-and-down displacement of the latest rear drive axle collected by the displacement sensor, so that the position of the current transmission shaft intermediate bearing is adjusted, the position of the transmission shaft intermediate bearing is adjusted more timely and flexibly, and the adjustment accuracy is improved.
In addition, in the embodiment, the control module can perform test calculation for multiple times through adjustment and comparison to perform optimization, finally determine the optimal z-direction coordinate value when the equivalent included angle of the transmission shaft system is the minimum, and perform transmission shaft intermediate support adjustment according to the optimal z-direction coordinate value, so that the problem that the equivalent included angle of the transmission shaft is increased due to different loads is solved more pertinently, and the accuracy of adjustment control of the equivalent included angle of the transmission shaft is further improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for adjusting a propeller shaft intermediate bearing provided by an embodiment of the present application;
FIG. 2 is a schematic diagram of an equivalent included angle matlab calculation algorithm of a 2-axis transmission shafting;
FIG. 3 is a schematic structural diagram of an adjusting device for a middle support of a transmission shaft according to an embodiment of the present application;
FIG. 4 is a schematic view of an adjustment device for the intermediate support of a drive shaft in practical use;
FIG. 5 is a schematic structural diagram of a middle support of a transmission shaft in the embodiment of the present application;
FIG. 6 is a schematic view of a connection mode between a hydraulic lifting module and a front cross beam of a frame in an embodiment of the present application;
FIG. 7 is a schematic view of the installation position of the displacement sensor in the embodiment of the present application;
the device comprises a transmission shaft 1, a transmission shaft 2, a hydraulic lifting module 3, a frame front beam 4, a first connecting plate 5, a second connecting plate 6, a connecting hole 7, a frame 8, a frame rear beam 9 and a displacement sensor 10.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For a better understanding of the present application, embodiments thereof are explained in detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1, fig. 1 is a schematic flow chart of an adjusting method for a propeller shaft intermediate bearing according to an embodiment of the present disclosure. As can be seen from fig. 1, the adjusting method for the intermediate bearing of the transmission shaft in the present embodiment mainly includes the following steps:
s1: defining the power transmission direction of a chassis transmission shaft of a commercial vehicle as the x-axis direction, forming a transmission shaft system by n transmission shafts, forming any universal joint by a driving shaft and a corresponding driven shaft, wherein the plane where a driving shaft universal joint fork is positioned is BiThe plane of the driven shaft universal joint fork is Bi+1The vertical plane of the axis of the drive shaft being AiThe vertical plane of the driven shaft axis is Ai+1The center coordinate of each universal joint cross shaft is (x)i，yi，zi) Plane B of the driving yoke of each universal jointiPerpendicular plane A to the axis of the driving shaftiAngle between them is betaiThe number of the driving shafts is the same as that of the universal joints, and any driving shaft corresponds to one driven shaft.
βiThe direction used for expressing the universal joint fork is positive along the leading direction of the transmission direction and negative along the trailing direction. Since the transmission direction of the transmission shaft is very close to the x-axis direction, the power transmission direction of the chassis transmission shaft of the commercial vehicle is defined as the x-axis direction, and the plane B of the driving fork of each universal joint is definediPerpendicular plane A to the axis of the driving shaftiThe included angle between is betaiThe plane of the driving fork of the universal joint expressed by the method has very high precision, and the accuracy of a calculation result is improved, so that the accuracy of the adjustment of the middle support of the transmission shaft is improved. Moreover, by using the method, when the angle formed by the plane of the driving fork of the first universal joint and the vertical plane of the axis of the driving shaft and the angle of the forks at the two sides of each transmission shaft are known, each beta can be accurately calculatediThis approach is very computationally convenient.
In this embodiment, for the position and direction of the transmission shaft system composed of n transmission shafts, the central coordinates of the universal joint cross shafts are (x)i，yi，zi) The description is that, one point (0 point and n points) is added on the input shaft and the output shaft on two sides of the transmission shaft system, namely (x point)0，y0，z0) And (x)n+1，yn+1，zn+1) For expressing the direction of the input and output shafts.
With continued reference to fig. 1, after defining the relevant parameters, step S2 is executed: and acquiring the up-down displacement of the rear drive axle, and converting the displacement into an upper point coordinate of an input axis, an upper point coordinate of an output axis, a central point coordinate of each universal joint cross shaft and an included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft.
S3: according to the coordinates of the upper point of the input axis, the upper point of the output axis, the coordinates of the central point of each universal joint cross shaft and the vertical positions of the plane of each universal joint driving fork and the axis of the driving shaftAngle of straight plane using formula
Figure BDA0003605808830000081
Calculating to obtain the equivalent included angle theta of the current transmission shafte。
Wherein, thetaiThe included angle between the driving shaft and the driven shaft on the two sides of the ith universal joint, namely the included angle of the transmission shafts on the two sides of each universal joint. Alpha (alpha) ("alpha")iIs the initial phase angle of the ith gimbal, i.e.: the plane included angle formed by the plane of the driving fork and the axes of the transmission shafts on the two sides is positive when the front guide is positive and negative when the rear guide is negative. n is the number of transmission shafts, and thetai＝arccos(si-1·si)，SiIs the unit vector of the axis of the ith transmission shaft, an
Figure BDA0003605808830000082
liIs the length of the transmission shaft of the ith transmission shaft, and
Figure BDA0003605808830000083
initial phase of ith gimbal
Figure BDA0003605808830000084
Wherein i is the unit vector of the x axis,
Figure BDA0003605808830000085
is used for determining positive and negative signs, and is determined by the right hand rule along the x-axis direction, wherein the leading direction is positive, the trailing direction is negative, and N isiIs a unit normal vector of a plane in which the ith universal joint driving shaft and the ith universal joint driven shaft are positioned, and
Figure BDA0003605808830000086
tiis the unit vector of the ith gimbal active fork plane normal, and ti＝[0 cosβi sinβi]T。
S4: and changing the z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft for multiple times according to the set variable, and determining the equivalent included angle of the transmission shaft system after the z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft is changed one by one according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft.
In the embodiment, a method of changing the z-direction coordinate value of the middle support center point coordinate of the transmission shaft at virtual equal intervals, carrying out test calculation for multiple times and carrying out optimization is adopted. Specifically, step S4 includes the following processes:
s41: and changing the z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft according to the set variable.
S42: according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft, the point coordinate on the input axis, the point coordinate on the output axis, the center point coordinate of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the Z direction in the center point coordinate of the middle support of the transmission shaft is changed are determined.
S43: and calculating to obtain a first equivalent included angle of the current transmission shaft according to the coordinate of the point on the input axis, the coordinate of the point on the output axis, the coordinate of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the Z direction in the coordinate of the central point of the middle support of the transmission shaft is changed.
S44: and changing the z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft according to the set variable again, and sequentially calculating to obtain a second equivalent included angle and a third equivalent included angle until an Mth equivalent included angle, wherein M is a natural number and is more than or equal to 2.
After the transmission shafting equivalent included angle after the z-direction coordinate value changes in the middle support center point coordinates of the transmission shaft is determined one by one according to the set variable, the step S5 is executed: and comparing the equivalent included angles of the plurality of transmission shafts, and determining a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft matched with the minimum equivalent included angle of the transmission shaft, wherein the z-direction coordinate value is defined as the optimal z-direction coordinate value of the current transmission shaft.
After determining the optimal z-coordinate value, step S7 is executed: and adjusting the position of the current middle support of the transmission shaft according to the optimal z-direction coordinate value.
The method for calculating the equivalent included angle of the transmission shaft in this embodiment can be implemented in matlab, and the specific editing content is shown in fig. 2. As can be seen from the figure 2 of the drawings,
taking a 2-axis transmission shaft system as an example, editing a calculation algorithm in matlab, wherein the input quantity of the calculation algorithm is a point coordinate (x) on the axis of an input shaft0，y0，z0) The coordinates (x) of the upper point of the first universal joint cross axle1，y1，z1) And the coordinates (x) of the upper point of the second universal joint cross2，y2，z2) Third universal joint cross axis upper point coordinate (x)3，y3，z3) And the coordinates (x) of the point on the axis of the input shaft4，y4，z4) The included angle beta between the plane of the first driving fork and the vertical plane of the axis of the driving shaft1The included angle beta between the plane of the second driving fork and the vertical plane of the axis of the driving shaft2The included angle beta between the plane of the third driving fork and the vertical plane of the axis of the driving shaft3。
In the aspect of the direction of the universal joint fork of the transmission shaft, the angle of the plane of the universal joint fork on the two sides of each transmission shaft is generally given, and the transmission shaft with the plane of the universal joint fork on the two sides of 0 degree and 90 degree is adopted in many practical situations. The input of the included angle between the plane of the driving fork and the vertical plane of the axis of the driving shaft is to distinguish whether the driving fork of each universal joint is 0 degree or 90 degrees, and according to the embodiment of the invention, the included angle between the plane of the first driving fork and the vertical plane of the axis of the driving shaft is 90 degrees, the included angle between the plane of the second driving fork and the vertical plane of the axis of the driving shaft is 90 degrees, and the included angle between the plane of the third driving fork and the vertical plane of the axis of the driving shaft is 0 degree.
Further, before the step S7, the method further includes a step S6: the adjustment mode switch is turned on.
In addition, the adjustment method in this embodiment is applied when the vehicle is started and when the transmission is in neutral. That is to say, in the present exemplary embodiment, the automatic adjustment of the position of the intermediate bearing of the drive shaft can only be carried out when the vehicle is started and the transmission is in neutral.
Example two
Referring to fig. 3 on the basis of the embodiment shown in fig. 1 and 2, fig. 3 is a schematic structural diagram of an adjusting device for a middle support of a transmission shaft according to an embodiment of the present application. As can be seen from fig. 3, the adjusting device for the intermediate support of the transmission shaft in the present embodiment mainly includes: hydraulic pressure lift module, displacement sensor and control module. The adjusting device in the embodiment is applied to a chassis transmission shaft of a commercial vehicle.
The displacement sensor is used for measuring the up-down displacement of the rear drive axle and converting the displacement into an input axis upper point coordinate, an output axis upper point coordinate, a universal joint cross shaft central point coordinate and an included angle between a universal joint driving fork plane and a driving shaft axis vertical plane; the control module is used for changing the z-direction coordinate value of the middle support central point coordinate at virtual equal intervals according to the measurement result of the displacement sensor, and determining the optimal z-direction coordinate value of the current transmission shaft, wherein the optimal z-direction coordinate value is the z-direction coordinate value of the middle support central point coordinate of the transmission shaft matched with the minimum transmission shaft system equivalent included angle; and the hydraulic lifting module is used for adjusting the position of the current middle support of the transmission shaft according to the optimal z-direction coordinate value.
The structure of the adjusting device for the intermediate bearing of the transmission shaft in practical application is schematically shown in fig. 4; the structural schematic diagram of the transmission shaft intermediate bearing can be seen in fig. 5; in the embodiment of the application, a schematic connection mode between the hydraulic lifting module and the front frame cross beam can be seen as shown in fig. 6; a schematic diagram of the installation position of the displacement sensor can be seen in fig. 7.
As can be seen from fig. 4, the transmission shaft 1 of the chassis of the commercial vehicle of the present embodiment is provided with a transmission shaft intermediate support 2, and the hydraulic lifting module 3 is disposed between the transmission shaft intermediate support 2 and the frame front cross member 4. As can be seen from fig. 7, the displacement sensor 10 is mounted on the bottom of the rear cross member 9 of the vehicle frame.
The adjusting device of the embodiment is also provided with a first connecting plate and a second connecting plate, the middle support of the transmission shaft is connected with the hydraulic lifting module through the first connecting plate, and the hydraulic lifting module is connected with the front frame cross beam through the second connecting plate. As can be seen from fig. 5 and 6, the propeller shaft intermediate bearing 2 in the present embodiment is connected to the hydraulic lift module 3 via a first connecting plate 5, and the hydraulic lift module 3 is connected to the frame front cross member 4 via a second connecting plate 6.
Further, the hydraulic lift module includes: hydraulic pressure valve, hydraulic pressure lift body and hydraulic pressure lift arm. As can be seen from fig. 6, the hydraulic lifting arm is provided with a connecting hole 7, the transmission shaft intermediate support 2 is fixedly connected with the hydraulic lifting body through a first connecting plate 5 and the connecting hole 7 by bolts, the hydraulic lifting body is fixedly connected with the frame front cross beam 4 through a second connecting plate 6 by bolts, and the hydraulic valve is used for controlling the hydraulic lifting body to adjust the z-direction coordinate in the center point coordinate of the transmission shaft intermediate support according to the optimal z-direction coordinate value determined by the control module. The lifting stroke of the hydraulic lifting module in the embodiment is 0-60 mm.
The control module of this embodiment includes: the device comprises an equivalent included angle calculation unit, a variable setting unit and an optimal z-direction coordinate value determination unit.
The equivalent included angle calculation unit is used for calculating the equivalent included angle according to the coordinates of the upper point of the input axis, the coordinates of the upper point of the output axis, the coordinates of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft by using a formula
Figure BDA0003605808830000101
Calculating to obtain the equivalent included angle theta of the current transmission shafteWherein, thetaiIs the angle between the driving shaft and the driven shaft on both sides of the ith universal joint, alphaiIs the initial phase angle of the ith universal joint, n is the number of transmission shafts, and thetai＝arccos(si-1·si)，SiIs the unit vector of the axis of the ith transmission shaft, an
Figure BDA0003605808830000102
liIs the length of the transmission shaft of the ith transmission shaft, an
Figure BDA0003605808830000103
Initial phase of ith gimbal
Figure BDA0003605808830000104
Wherein the content of the first and second substances,
Figure BDA0003605808830000111
for determining positive and negative signs, in the x-directionDirection, according to the right-hand rule, lead is positive, lead is negative, NiIs a unit normal vector of a plane in which the ith universal joint driving shaft and the ith universal joint driven shaft are positioned, and
Figure BDA0003605808830000112
tiis the unit vector of the ith gimbal active fork plane normal, and ti＝[0 cosβi sinβi]T(ii) a The variable setting unit is used for changing a z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft for multiple times according to a set variable; the equivalent included angle calculation unit is also used for determining the equivalent included angle of the transmission shaft system after the Z-direction coordinate value in the coordinate of the central point of the middle support of the transmission shaft is changed one by one according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft; and the optimal z-direction coordinate value determining unit is used for comparing the multiple transmission shafting equivalent included angles, determining a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft matched with the minimum transmission shafting equivalent included angle, and defining the z-direction coordinate value as the optimal z-direction coordinate value of the current transmission shaft.
Further, the equivalent included angle calculation unit includes: the device comprises a parameter calculating subunit, a first equivalent included angle calculating subunit and an Mth equivalent included angle calculating subunit. The parameter calculation subunit is used for determining an upper point coordinate of an input axis, an upper point coordinate of an output axis, a central point coordinate of each universal joint cross shaft and an included angle between a plane of each universal joint driving fork and a vertical plane of a driving shaft axis after a z-direction coordinate value in a central point coordinate of the middle support of the transmission shaft is changed according to a set variable and a connecting position between the middle support of the transmission shaft and the transmission shaft; the first equivalent included angle calculating subunit is used for calculating a first equivalent included angle of the current transmission shaft according to the coordinate of the upper point of the input axis, the coordinate of the upper point of the output axis, the coordinate of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the z direction in the coordinate of the middle supporting central point of the transmission shaft is changed; and the Mth equivalent included angle calculating subunit is further used for sequentially calculating a second equivalent included angle and a third equivalent included angle until the Mth equivalent included angle after changing the z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft again according to the set variable, wherein M is a natural number, and M is more than or equal to 2.
In practical application, when the cargo carrying working condition changes, a driver starts an adjusting mode button, a displacement sensor measures the upper displacement and the lower displacement of a rear axle, and the change of the displacement is converted into the change of the center point coordinate of the last universal joint cross shaft of a transmission shaft system and the change of the point coordinate on the axis of an output shaft; the control module calculates the equivalent included angle of the transmission shaft system under the current load by taking the coordinates of the upper points of the axes of the input shafts, the coordinates of the central points of the universal joint cross shafts, the coordinates of the upper points of the axes of the output shafts and the included angle between the plane of the driving fork of each universal joint and the vertical plane of the axis of the driving shaft as input quantities; adjusting the z coordinate value of the middle support center point coordinate, calculating the point coordinate (x) on the second universal joint cross shaft after the z coordinate value of the middle support center point coordinate is changed according to the change amount of the z coordinate value of the middle support center point coordinate and the position of the middle support connected with the transmission shaft2，y2，z2) (ii) a And the coordinate (x) of the point on the input shaft axis0，y0，z0) Coordinates (x) of points on the first universal joint cross1，y1，z1) 3 rd universal joint cross axis upper point coordinate (x)3，y3，z3) Coordinate (x) of point on axis of input shaft4，y4，z4) Is not influenced by the coordinate change of the central point of the middle support. The Z-direction coordinate value of the coordinate of the middle supporting center point is virtually changed in the control module to carry out calculation optimization, the Z-direction coordinate value of the coordinate of the middle supporting center point can be changed by 2mm each time, the Z-direction coordinate value of the coordinate of the middle supporting center point when the equivalent included angle of the transmission shaft system is the minimum is calculated in 30 times of experiments, then the hydraulic device is adjusted to realize the adjustment of the middle supporting position, the problem that the equivalent included angle of the transmission shaft system is enlarged due to different loads is solved, and the rotating speed fluctuation and the action of dynamic additional bending moment of the transmission shaft are reduced.
The working principle and the working method of the adjusting device for the intermediate bearing of the transmission shaft in the embodiment are explained in detail in the embodiment shown in fig. 1 and fig. 2, and the two embodiments can be referred to each other and are not described again.
The previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An adjustment method for a propeller shaft intermediate bearing, characterized in that the adjustment method is applied to a commercial vehicle chassis propeller shaft, the adjustment method comprising:
defining the power transmission direction of a chassis transmission shaft of a commercial vehicle as the x-axis direction, forming a transmission shaft system by n transmission shafts, forming any universal joint by a driving shaft and a corresponding driven shaft, and setting the plane of a driving shaft universal joint fork as BiThe plane of the driven shaft universal joint fork is Bi+1The vertical plane of the axis of the driving shaft is AiThe vertical plane of the driven shaft axis is Ai+1The center coordinate of each universal joint cross shaft is (x)i，yi，zi) Plane B of driving fork of each universal jointiVertical plane A with the axis of the driving shaftiAngle between them is betaiWherein the number of the driving shafts is the same as that of the universal joints;
acquiring the up-down displacement of a rear drive axle, and converting the displacement into an upper point coordinate of an input axis, an upper point coordinate of an output axis, a central point coordinate of each universal joint cross shaft and an included angle between a plane of each universal joint driving fork and a vertical plane of a driving shaft axis;
according to the coordinates of the upper point of the input axis, the coordinates of the upper point of the output axis, the coordinates of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft, a formula is utilized
Figure FDA0003605808820000011
Calculating to obtain the current transmissionEquivalent included angle theta of moving shafteWherein, thetaiIs an included angle between a driving shaft and a driven shaft on both sides of the ith universal joint, alphaiIs the initial phase angle of the ith universal joint, n is the number of transmission shafts, and thetai＝arccos(si-1·si)，SiIs the unit vector of the axis of the ith transmission shaft, an
Figure FDA0003605808820000012
liIs the length of the transmission shaft of the ith transmission shaft, and
Figure FDA0003605808820000013
initial phase of ith gimbal
Figure FDA0003605808820000014
Wherein the content of the first and second substances,
Figure FDA0003605808820000015
for determining the sign of positive or negative, along the x-axis, according to the right-hand rule, leading is positive, leading is negative, and NiIs a unit normal vector of a plane in which the ith cardan joint driving shaft and the ith cardan joint driven shaft are located, an
Figure FDA0003605808820000016
tiIs the unit vector of the ith gimbal active fork normal, and ti＝[0 cosβi sinβi]T；
Changing a z-direction coordinate value in a coordinate of a middle support central point of a transmission shaft for multiple times according to a set variable, and determining an equivalent included angle of a transmission shaft system after the z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft is changed one by one according to the set variable and a connecting position between a middle support of the transmission shaft and the transmission shaft;
comparing the equivalent included angles of the plurality of transmission shafts, determining a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft matched with the minimum equivalent included angle of the transmission shaft, and defining the z-direction coordinate value as the optimal z-direction coordinate value of the current transmission shaft;
and adjusting the position of the current middle support of the transmission shaft according to the optimal z-direction coordinate value.
2. The method according to claim 1, wherein the step of changing the z-coordinate value of the center point coordinate of the middle bearing of the transmission shaft a plurality of times according to a set variable, and determining the equivalent included angle of the transmission shaft system after the z-coordinate value of the center point coordinate of the middle bearing of the transmission shaft is changed one by one according to the set variable and the connection position between the middle bearing of the transmission shaft and the transmission shaft comprises:
changing a z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft according to a set variable;
according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft, determining the coordinate of an upper point of an input axis, the coordinate of an upper point of an output axis, the coordinate of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the Z direction in the coordinate of the central point of the middle support of the transmission shaft is changed;
calculating to obtain a first equivalent included angle of the current transmission shaft according to the coordinate of a point on an input axis, the coordinate of a point on an output axis, the coordinate of the center point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the z direction in the coordinate of the middle support center point of the transmission shaft is changed;
and changing the z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft according to the set variable again, and sequentially calculating to obtain a second equivalent included angle and a third equivalent included angle until an Mth equivalent included angle, wherein M is a natural number and is more than or equal to 2.
3. An adjustment method for a propeller shaft intermediate bearing according to claim 1, characterised in that the adjustment method is applied when the vehicle is started and when the gearbox is in neutral.
4. The method of claim 1, wherein before adjusting the position of the current intermediate bearing of the propeller shaft based on the optimal z-coordinate value, the method further comprises:
the adjustment mode switch is turned on.
5. An adjustment device for a propeller shaft intermediate bearing, characterized in that the adjustment device is applied to a commercial vehicle chassis propeller shaft, the adjustment device comprising: the hydraulic lifting module is arranged between the middle support of the transmission shaft and a front cross beam of the frame, the displacement sensor is arranged at the bottom of a rear cross beam of the frame, and the control module is arranged in a cab instrument desk;
the displacement sensor is used for measuring the upper and lower displacement of the rear drive axle and converting the displacement into an upper point coordinate of an input axis, an upper point coordinate of an output axis, a central point coordinate of each universal joint cross shaft and an included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft;
the control module is used for changing the z-direction coordinate value of the middle support central point coordinate at virtual equal intervals according to the measurement result of the displacement sensor, and determining the optimal z-direction coordinate value of the current transmission shaft, wherein the optimal z-direction coordinate value is the z-direction coordinate value of the middle support central point coordinate of the transmission shaft matched with the minimum transmission shaft system equivalent included angle;
and the hydraulic lifting module is used for adjusting the position of the current middle support of the transmission shaft according to the optimal z-direction coordinate value.
6. The adjustment device for a propeller shaft intermediate bearing according to claim 5, wherein the control module comprises:
the equivalent included angle calculation unit is used for utilizing a formula according to the coordinates of the upper point of the input axis, the coordinates of the upper point of the output axis, the coordinates of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft
Figure FDA0003605808820000031
Calculating to obtain the equivalent included angle theta of the current transmission shafteWherein, θiIs the angle between the driving shaft and the driven shaft on both sides of the ith universal joint, alphaiIs the initial phase angle of the ith universal joint, n is the number of transmission shafts, and thetai＝arccos(si-1·si)，SiIs the unit vector of the axis of the ith transmission shaft, an
Figure FDA0003605808820000032
liIs the length of the transmission shaft of the ith transmission shaft, and
Figure FDA0003605808820000033
initial phase of ith gimbal
Figure FDA0003605808820000034
Wherein the content of the first and second substances,
Figure FDA0003605808820000035
is used for determining positive and negative signs, and is determined by the right hand rule along the x-axis direction, wherein the leading direction is positive, the trailing direction is negative, and N isiIs a unit normal vector of a plane in which the ith cardan joint driving shaft and the ith cardan joint driven shaft are located, an
Figure FDA0003605808820000036
tiIs the unit vector of the ith gimbal active fork plane normal, and ti＝[0 cosβi sinβi]T；
The variable setting unit is used for changing a z-direction coordinate value in the coordinate of the middle support center point of the transmission shaft for multiple times according to a set variable;
the equivalent included angle calculating unit is further used for determining the equivalent included angle of the transmission shaft system after the Z-direction coordinate value in the coordinate of the central point of the middle support of the transmission shaft is changed one by one according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft;
and the optimal z-direction coordinate value determining unit is used for comparing the equivalent included angles of the plurality of transmission shafts, determining a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft matched with the minimum equivalent included angle of the transmission shaft, and defining the z-direction coordinate value as the optimal z-direction coordinate value of the current transmission shaft.
7. The adjusting apparatus for a propeller shaft intermediate bearing according to claim 6, wherein the equivalent included angle calculating unit includes:
the parameter calculating subunit is used for determining the coordinate of a point on the input axis, the coordinate of a point on the output axis, the coordinate of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the z-direction coordinate in the coordinate of the central point of the middle support of the transmission shaft is changed according to the set variable and the connecting position between the middle support of the transmission shaft and the transmission shaft;
the first equivalent included angle calculating subunit is used for calculating a first equivalent included angle of the current transmission shaft according to the coordinate of the upper point of the input axis, the coordinate of the upper point of the output axis, the coordinate of the central point of each universal joint cross shaft and the included angle between the plane of each universal joint driving fork and the vertical plane of the axis of the driving shaft after the coordinate value of the z direction in the coordinate of the middle supporting central point of the transmission shaft is changed;
and the Mth equivalent included angle calculating subunit is also used for changing a z-direction coordinate value in the coordinate of the middle support central point of the transmission shaft according to the set variable again, and then sequentially calculating to obtain a second equivalent included angle and a third equivalent included angle until the Mth equivalent included angle, wherein M is a natural number and is more than or equal to 2.
8. The adjusting device for the intermediate bearing of the transmission shaft according to claim 5, wherein a first connecting plate and a second connecting plate are further arranged in the adjusting device, the intermediate bearing of the transmission shaft is connected with the hydraulic lifting module through the first connecting plate, and the hydraulic lifting module is connected with the front cross beam of the frame through the second connecting plate.
9. The adjusting apparatus for an intermediate bearing of a drive shaft according to claim 8, wherein the hydraulic lift module comprises: the hydraulic lifting mechanism comprises a hydraulic valve, a hydraulic lifting body and a hydraulic lifting arm, wherein a connecting hole is formed in the hydraulic lifting arm, the transmission shaft intermediate bearing is fixedly connected with the hydraulic lifting body through a bolt via the first connecting plate and the connecting hole, the hydraulic lifting body is fixedly connected with a frame front cross beam through a second connecting plate via the bolt, and the hydraulic valve is used for controlling the hydraulic lifting body to adjust a z-direction coordinate in a transmission shaft intermediate bearing central point coordinate according to an optimal z-direction coordinate value determined by a control module.
10. The adjusting device for the intermediate bearing of the transmission shaft as claimed in claim 5, wherein the lifting stroke of the hydraulic lifting module is 0-60 mm.
CN202210415653.0A 2022-04-20 2022-04-20 Adjusting method and adjusting device for transmission shaft intermediate support Pending CN114771244A (en)

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