CN217084201U - Static rigidity test device for body-in-white - Google Patents
Static rigidity test device for body-in-white Download PDFInfo
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Abstract
The utility model discloses a quiet rigidity test device of white automobile body, include: the loading beam extends from a first end to a second end along the length direction, the first end is provided with a first traction cable connecting position, and the second end is provided with a second traction cable connecting position; the fixed pulleys comprise a first fixed pulley and a second fixed pulley; the output end of the load loading mechanism is provided with a movable pulley; one end of the traction cable is connected to the first traction cable connecting position, and the other end of the traction cable is connected to the second traction cable connecting position after passing around the first fixed pulley, the movable pulley and the second fixed pulley; the load loading mechanism can drive the movable pulley to move so as to draw the traction cable, and the movable pulley is used for equally distributing the load to the first end and the second end of the loading beam through the traction cable. The loading on the two sides of the body in white can be realized only by controlling a group of load loading mechanisms, the loads on the two sides are equal and have small fluctuation, and the testing efficiency and the testing precision are improved.
Description
Technical Field
The utility model is used for car research and development test field especially relates to a quiet rigidity test device of white automobile body.
Background
The static stiffness indexes of the white automobile body of the automobile generally comprise bending stiffness and torsional stiffness, wherein the torsional stiffness of the white automobile body of the automobile can be measured by indexes such as a torsional angle of the white automobile body of the automobile, diagonal line variable quantities of each side door opening and each tail door opening, and the like, and the bending stiffness of the white automobile body of the automobile can be measured by front and rear deformation quantities of the white automobile body of the automobile. Therefore, the static stiffness of the white body of the automobile is an important index for evaluating the design reliability, the safety performance of the whole automobile and the like of the automobile, and the torsional stiffness analysis and the bending stiffness analysis aiming at the white body of the automobile are one of essential key links in the development and design process of the whole automobile.
In the prior art, two groups of loading mechanisms (hydraulic cylinders or electric cylinders) are generally adopted for loading the static rigidity test load of the body-in-white, and the loading mode has the following defects:
1) the load mechanism of the existing load loading method takes long time to install and debug;
2) the cost of the two sets of load loading mechanisms used is high;
3) the two groups of load loading mechanisms cannot ensure that the loading forces on the two sides are consistent.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a quiet rigidity test device of white automobile body, it only needs control a set of load loading mechanism, can realize white automobile body both sides loading, and both sides load equals moreover, undulant little, has promoted efficiency of software testing and experimental precision.
The utility model provides a technical scheme that its technical problem adopted is:
a body-in-white static stiffness test device, comprising:
the loading beam extends from a first end to a second end along the length direction, the first end is provided with a first traction cable connecting position, and the second end is provided with a second traction cable connecting position;
the fixed pulleys comprise a first fixed pulley and a second fixed pulley, the first fixed pulley and the second fixed pulley are distributed along the length direction of the loading beam, the first fixed pulley is arranged below the loading beam corresponding to the connection position of the first traction cable, and the second fixed pulley is arranged below the loading beam corresponding to the connection position of the second traction cable;
the output end of the load loading mechanism is provided with a movable pulley;
one end of the traction cable is connected to the first traction cable connecting position, and the other end of the traction cable is connected to the second traction cable connecting position after passing around the first fixed pulley, the movable pulley and the second fixed pulley;
the load loading mechanism can drive the movable pulley to move so as to draw the traction cable, and the movable pulley is used for equally distributing load to the first end and the second end of the loading beam through the traction cable.
In some embodiments, further comprising:
the fixed pulley block is arranged on one side, away from the first fixed pulley, of the second fixed pulley and comprises a third fixed pulley and a fourth fixed pulley, the third fixed pulley is higher than the fourth fixed pulley, and the third fixed pulley and the fourth fixed pulley are spaced at a certain distance along the length direction of the loading beam;
the second fixed pulley is higher than the first fixed pulley, the movable pulley is located above the fixed pulley group, the movable pulley is driven by the load loading mechanism to lift, one end of the traction cable is connected to the connecting position of the first traction cable, and the other end of the traction cable is wound around the first fixed pulley, the fourth fixed pulley, the movable pulley, the third fixed pulley and the second fixed pulley and then is connected to the connecting position of the second traction cable.
In some embodiments, further comprising:
the fixed pulley mounting part extends along the length direction of the loading beam, and the first fixed pulley, the second fixed pulley and the pulley block are mounted on the fixed pulley mounting part.
In some embodiments, the load loading mechanism comprises a chain block or an electric block.
In some embodiments, the bottom of the loading beam is provided with a loading ram, and the loading ram comprises a first loading ram arranged at a first end of the loading beam and a second loading ram arranged at a second end of the loading beam.
In some embodiments, the first loading pressure head and the second loading pressure head each comprise a support, an adjusting bolt and a pressure head, the adjusting bolt is connected between the pressure head and the support, the first loading pressure head and the second loading pressure head can adjust the height by rotating the adjusting bolt, a mounting groove is formed in the top of the support, and the loading beam is embedded into the mounting groove.
In some embodiments, the traction cable is provided with a force sensor that detects the tension.
In some embodiments, further comprising:
and a first displacement sensor for detecting a deformation amount of the body-in-white at the loading position.
In some embodiments, further comprising:
the white vehicle body fixing support comprises a front suspension support and a rear suspension support, and is used for supporting a white vehicle body at a certain height above the ground.
In some embodiments, the front and rear suspension brackets are each provided with a second displacement sensor.
One of the above technical solutions has at least one of the following advantages or beneficial effects: the force transmission direction is changed according to the fixed pulley principle, namely the load loading direction of the first end of the loading beam is changed by the first fixed pulley, the load loading direction of the second end of the loading beam is changed by the second fixed pulley, and then the load loaded to the body-in-white can be output by the load loading mechanism. Meanwhile, according to the movable pulley principle, the movable pulley equally distributes the load to the first end and the second end of the loading beam through the traction cable, and the load on the left side and the right side of the body in white is equal.
According to the technical scheme, the test device is low in cost, expensive loading equipment does not need to be purchased, the test device is convenient and quick to assemble, loading on two sides of a body in white is achieved by controlling only one group of load loading mechanisms, loads on two sides are equal and small in fluctuation, and the test efficiency and the test precision are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a use state of the embodiment shown in FIG. 1;
FIG. 3 is a schematic view of the bottom structure of the load beam of the embodiment shown in FIG. 1;
FIG. 4 is a schematic view of the first loading ram configuration of the embodiment shown in FIG. 1;
FIG. 5 is a schematic view of the arrangement of the first and second displacement sensors in one embodiment shown in FIG. 1.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for convenience of description of the technical solution of the present invention, and it is not intended to indicate or imply that the technical features indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the utility model, the meaning of a plurality of is one or more, the meaning of a plurality of is more than two, and the meaning of more than two is understood as not including the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is any description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the present invention, unless otherwise explicitly defined, the terms "set", "install", "connect", and the like are to be understood in a broad sense, and for example, may be directly connected or may be indirectly connected through an intermediate medium; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.
Fig. 2 and 5 show a reference direction coordinate system of an embodiment of the present invention, and the following describes an embodiment of the present invention with reference to directions shown in fig. 2 and 5.
Referring to fig. 1 and 2, an embodiment of the present invention provides a white car body static rigidity testing apparatus, which includes a loading beam 1, a fixed pulley, a load loading mechanism 2 and a traction cable 3.
The loading beam 1 extends from a first end 11 to a second end 12 along the length direction, the loading beam 1 can transversely penetrate the body in white 4 along the left-right direction when in use, the first end 11 of the loading beam 1 extends to the left side of the body in white 4, the second end 12 of the loading beam 1 extends to the right side of the body in white 4, wherein, with reference to fig. 3, the first end 11 is provided with a first traction cable connection position 13, and the second end 12 is provided with a second traction cable connection position 14. The load beam 1 forms a cantilever beam connected with a traction rope 3 on a body-in-white 4.
The fixed pulley is used for adjusting the direction of the traction cable 3 to apply the load of the load applying mechanism 2 to the load beam 1 in a downward direction, and further to the body-in-white 4 through the load beam 1. Specifically, the fixed pulleys include a first fixed pulley 51 and a second fixed pulley 52, the first fixed pulley 51 and the second fixed pulley 52 are distributed along the length direction of the loading beam 1, the first fixed pulley 51 is arranged below the loading beam 1 corresponding to the first traction cable connection position 13, the second fixed pulley 52 is arranged below the loading beam 1 corresponding to the second traction cable connection position 14, in order to avoid the skew of the traction cable 3, the first fixed pulley 51 needs to be arranged at an orthographic projection position right below the first traction cable connection position 13, and the second fixed pulley 52 needs to be arranged at an orthographic projection position right below the second traction cable connection position 14.
The output end of the load loading mechanism 2 is provided with a movable pulley 6, the load loading mechanism 2 transmits the output load to a traction cable 3 through the movable pulley 6, specifically, one end of the traction cable 3 is connected to a first traction cable connection position 13, and the other end of the traction cable 3 is connected to a second traction cable connection position 14 after passing through a first fixed pulley 51, the movable pulley 6 and a second fixed pulley 52.
Wherein the load loading mechanism 2 can drive the movable pulley 6 to move so as to draw the traction cable 3, and the movable pulley 6 is used for equally distributing the load to the first end 11 and the second end 12 of the loading beam 1 through the traction cable 3.
The principle of the embodiment of the utility model is as follows: firstly, the force transmission direction is changed according to the fixed pulley principle, namely, the load loading direction of the first end 11 of the loading beam 1 is changed by using the first fixed pulley 51, the load loading direction of the second end 12 of the loading beam 1 is changed by using the second fixed pulley 52, and then the load loaded on the body-in-white 4 can be output by the load loading mechanism 2. Meanwhile, according to the principle of the movable pulley 6, the movable pulley 6 equally distributes the load to the first end 11 and the second end 12 of the loading beam 1 through the traction cable 3, and the equal load on the left side and the right side of the body-in-white 4 is realized.
According to the technical scheme, the test device is low in cost, expensive loading equipment does not need to be purchased, the test device is convenient and quick to assemble, loading on two sides of the body in white 4 is achieved only by controlling the group of load loading mechanisms 2, loads on two sides are equal and small in fluctuation, and the test efficiency and the test precision are improved.
In some embodiments, the load applying mechanism 2 may be disposed on one side of the first fixed pulley 51 or one side of the second fixed pulley 52 in the longitudinal direction of the load beam 1, and the load applying mechanism 2 can drive the movable pulley 6 in the longitudinal direction of the load beam 1, i.e., in the left-right direction, to apply a load to the traction cable 3.
In some embodiments, the load loading mechanism 2 can also drive the movable pulley 6 in the height direction to apply a load to the traction cable 3, and referring to fig. 1, the body-in-white static rigidity testing apparatus further includes a fixed pulley group, the fixed pulley group is disposed on a side of the second fixed pulley 52 facing away from the first fixed pulley 51, the fixed pulley group includes a third fixed pulley 53 and a fourth fixed pulley 54, the third fixed pulley 53 is higher than the fourth fixed pulley 54, and the third fixed pulley 53 and the fourth fixed pulley 54 are spaced at a certain distance along the length direction of the loading beam 1; the second fixed pulley 52 is higher than the first fixed pulley 51, the movable pulley 6 is positioned above the fixed pulley group and driven by the load loading mechanism 2 to ascend and descend, one end of the traction cable 3 is connected to the first traction cable connecting position 13, and the other end of the traction cable 3 is connected to the second traction cable connecting position 14 after passing through the first fixed pulley 51, the fourth fixed pulley 54, the movable pulley 6, the third fixed pulley 53 and the second fixed pulley 52. In this embodiment, the load applying mechanism 2 can drive the movable pulley 6 in the height direction, i.e., the up-down direction, to apply a load to the traction cable 3.
Further, referring to fig. 1, in some embodiments, the load loading mechanism 2 includes a chain block or an electric block. When in use, the chain block or the electric block is directly hung on the hook 7 of the traveling crane, in other words, the supporting system of the load loading mechanism 2 is the traveling crane 7, and the block is hung on the hook 7 of the traveling crane. And a supporting system such as a gantry crane is not required to be newly arranged, the common traveling crane 7 equipment in a laboratory is fully utilized, and the cost is saved. Meanwhile, the advantages that the traveling crane 7 is easy to operate and adjust position are utilized. The operation of installing and adjusting the support system is saved.
It is understood that the load loading mechanism 2 can also adopt a hydraulic cylinder or an electric cylinder, and the load loading mechanism 2 can drive the movable pulley 6 to change the position in a specific direction to complete load loading.
In some embodiments, in order to facilitate the installation of the fixed pulleys and ensure the installation space to improve the load application precision, referring to fig. 1 and 2, the body-in-white static rigidity testing device further comprises a fixed pulley installation part 5, the fixed pulley installation part 5 extends along the length direction of the loading beam 1, and the first fixed pulley 51, the second fixed pulley 52 and the pulley block are all installed on the fixed pulley installation part 5. The first fixed pulley 51, the second fixed pulley 52 and the pulley block are pre-installed on the fixed pulley installation part 5, and further are uniformly installed on a white car body 4 test station of a laboratory floor platform through the fixed pulley installation part 5.
In some embodiments, referring to fig. 1, 2, the bottom of the load beam 1 is provided with a load ram 8, the load ram 8 is a block (e.g., a cast iron block, a steel block, etc.) placed between the body-in-white 4 and the load beam 1, and the load ram 8 can be configured in a variety of shapes, weights, and sizes to facilitate matching body-in-white 4 of different vehicle models. Wherein the loading ram 8 comprises a first loading ram provided at a first end 11 of the loading beam 1 and a second loading ram provided at a second end 12 of the loading beam 1. The loading beam 1 needs to be ensured to be horizontal during the test; the vehicle body in white 4 is taken as a symmetry axis and is symmetrically arranged left and right.
Further, since the vehicle body installation surface of the loading ram 8 at the installation position of the body-in-white 4 is a curved surface, there may be a difference in height between the left and right rams when the ram is installed. In order to ensure the uniform pressure on the two sides, the loading beam 1 needs to be ensured to be horizontal, therefore, in some embodiments, a horizontal adjusting device is arranged at the loading pressure head 8, referring to fig. 3 and 4, each of the first loading pressure head and the second loading pressure head comprises a support 81, an adjusting bolt 82 and a pressure head 83, the adjusting bolt 82 is connected between the pressure head 83 and the support 81, the first loading pressure head 83 and the second loading pressure head 83 can adjust the height by rotating the adjusting bolt 82, the top of the support 81 is provided with a mounting groove 84, and the loading beam 1 is embedded in the mounting groove. The height of the loading beams 1 on the left side and the right side is consistent through height adjustment, so that the loading beams 1 are kept horizontal, and the pressure and the direction of the loading pressure heads 8 on the two sides of the body-in-white 4 are consistent.
In some embodiments the traction cable 3 is provided with a force sensor 31 detecting the pulling force. Referring to fig. 1, the force sensors 31 may be disposed at two ends of the traction cable 3, and the force sensors 31 are installed at two ends of the traction cable to detect the magnitude of the loading force, so that the force sensors 31 are connected to a computer to monitor the magnitude of the pulling force of the traction cable at two sides. The feeding and discharging amount of the hoist chain is controlled by monitoring the displayed value of the computer tension, so that the load loading device can achieve the required loading force.
In some embodiments, referring to fig. 5, the body-in-white static stiffness test apparatus further comprises a first displacement sensor 91, the first displacement sensor 91 being for detecting an amount of deformation of the body-in-white 4 at the loading position. The amount of deformation of the body-in-white 4 during loading can be detected by the first displacement sensor 91.
In some embodiments, referring to fig. 1 and 2, the body-in-white static rigidity testing apparatus further comprises a body-in-white fixing bracket, which comprises a front suspension bracket 92 and a rear suspension bracket 93, wherein the front suspension bracket is supported at the front end of the body-in-white 4 at a front suspension mounting position, the rear suspension bracket is supported at the rear end of the body-in-white 4 at a rear suspension mounting position, and the body-in-white fixing bracket is used for supporting the body-in-white 4 at a certain height above the ground.
Wherein, the front suspension bracket and the rear suspension bracket are both provided with a second displacement sensor 94. In the embodiment, the second displacement sensors 94 are arranged at the four fixed points of the body-in-white 4 to measure the deformation of the fixed points, and the deformation is corrected at the loading points, so that the calculation result of the bending rigidity of the body-in-white 4 is more accurate. Specifically, the second displacement sensors 94 are provided at four fixed points to measure the deformation amounts at the four fixed point positions, and the deformation amount at the vehicle body load applying position is corrected by the formula Dn ═ D- (D1+ D2)/2(Dn is the corrected deformation amount at the left or right body-in-white 4 applying point, D is the computer measured value of the deformation amount at the left or right body-in-white 4 applying point, D1 is the slight deformation amount of the front fixed point of the left or right body-in-white 4, and D2 is the slight deformation amount of the rear fixed point of the left or right body-in-white 4), thereby more accurately calculating the bending rigidity of the body-in-white 4.
In the description herein, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (10)
1. A white car body static rigidity test device is characterized by comprising:
the loading beam extends from a first end to a second end along the length direction, the first end is provided with a first traction cable connecting position, and the second end is provided with a second traction cable connecting position;
the fixed pulleys comprise a first fixed pulley and a second fixed pulley, the first fixed pulley and the second fixed pulley are distributed along the length direction of the loading beam, the first fixed pulley is arranged below the loading beam corresponding to the connection position of the first traction cable, and the second fixed pulley is arranged below the loading beam corresponding to the connection position of the second traction cable;
the output end of the load loading mechanism is provided with a movable pulley;
one end of the traction cable is connected to the first traction cable connecting position, and the other end of the traction cable is connected to the second traction cable connecting position after passing around the first fixed pulley, the movable pulley and the second fixed pulley;
the load loading mechanism can drive the movable pulley to move so as to draw the traction cable, and the movable pulley is used for equally distributing load to the first end and the second end of the loading beam through the traction cable.
2. The body-in-white static rigidity test apparatus according to claim 1, further comprising:
the fixed pulley block is arranged on one side, away from the first fixed pulley, of the second fixed pulley and comprises a third fixed pulley and a fourth fixed pulley, the third fixed pulley is higher than the fourth fixed pulley, and the third fixed pulley and the fourth fixed pulley are spaced at a certain distance along the length direction of the loading beam;
the second fixed pulley is higher than the first fixed pulley, the movable pulley is located above the fixed pulley group, the movable pulley is driven by the load loading mechanism to lift, one end of the traction cable is connected to the connecting position of the first traction cable, and the other end of the traction cable is wound around the first fixed pulley, the fourth fixed pulley, the movable pulley, the third fixed pulley and the second fixed pulley and then is connected to the connecting position of the second traction cable.
3. The body-in-white static rigidity test apparatus according to claim 2, further comprising:
the fixed pulley mounting part extends along the length direction of the loading beam, and the first fixed pulley, the second fixed pulley and the pulley block are mounted on the fixed pulley mounting part.
4. The white body static rigidity test device of claim 2, wherein the load loading mechanism comprises a chain block or an electric block.
5. The white body static rigidity test device of claim 1, wherein the bottom of the loading beam is provided with a loading ram, and the loading ram comprises a first loading ram arranged at a first end of the loading beam and a second loading ram arranged at a second end of the loading beam.
6. The static rigidity test device for the white vehicle body is characterized in that the first loading pressure head and the second loading pressure head respectively comprise a support, an adjusting bolt and a pressure head, the adjusting bolt is connected between the pressure head and the support, the first loading pressure head and the second loading pressure head can adjust the height by rotating the adjusting bolt, a mounting groove is formed in the top of the support, and the loading beam is embedded into the mounting groove.
7. The white body static rigidity test device according to claim 1, wherein the traction cable is provided with a force sensor for detecting a tensile force.
8. The body-in-white static rigidity test apparatus according to claim 1, further comprising:
and a first displacement sensor for detecting a deformation amount of the body-in-white at the loading position.
9. The body-in-white static rigidity test apparatus according to claim 1, further comprising:
the white vehicle body fixing support comprises a front suspension support and a rear suspension support, and is used for supporting a white vehicle body at a certain height above the ground.
10. The static rigidity test apparatus for vehicle bodies in white according to claim 9, wherein the front suspension bracket and the rear suspension bracket are each provided with a second displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220798947.1U CN217084201U (en) | 2022-04-07 | 2022-04-07 | Static rigidity test device for body-in-white |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220798947.1U CN217084201U (en) | 2022-04-07 | 2022-04-07 | Static rigidity test device for body-in-white |
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| CN217084201U true CN217084201U (en) | 2022-07-29 |
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| CN202220798947.1U Active CN217084201U (en) | 2022-04-07 | 2022-04-07 | Static rigidity test device for body-in-white |
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