Steering gear impact test platform
阅读说明:本技术 一种转向器冲击试验台 (Steering gear impact test platform ) 是由 李建华 郑树东 王志铁 张大川 王昌林 *** 于 2019-08-05 设计创作,主要内容包括:本发明涉及汽车制造技术领域,具体公开了一种转向器冲击试验台。该冲击试验台包括落锤冲击装置、样件固定装置和拉杆保持装置,样件固定装置设置于落锤冲击装置下方,样件固定装置能够按照实车状态固定转向器样件,且其刚度可调,使之与实车前副车架系统刚度一致;拉杆保持装置设置于样件固定装置上,拉杆保持装置用于夹持转向器样件的拉杆,可以实现转向器样件安装时拉杆的精确定位,并能实现在冲击前保持拉杆的定位精度,还能实现在冲击时断开连接以迅速释放拉杆,从而实现转向器样件受到冲击时拉杆的自由运动。该转向器冲击试验台可保证每次冲击试验时,转向器样件的拉杆均固定在同一位置,从而保证试验科学性和测试精度。(The invention relates to the technical field of automobile manufacturing, and particularly discloses a steering gear impact test bed. The impact test bed comprises a drop hammer impact device, a sample piece fixing device and a pull rod retaining device, wherein the sample piece fixing device is arranged below the drop hammer impact device, and the sample piece fixing device can fix a steering gear sample piece according to a real vehicle state and has adjustable rigidity so as to enable the rigidity of the sample piece to be consistent with that of a real vehicle front auxiliary frame system; the pull rod retaining device is arranged on the sample piece fixing device and used for clamping a pull rod of a steering gear sample piece, so that the accurate positioning of the pull rod during the installation of the steering gear sample piece can be realized, the positioning accuracy of the pull rod can be maintained before impact, the disconnection can be realized during impact to quickly release the pull rod, and the free movement of the pull rod when the steering gear sample piece is impacted is realized. The steering gear impact test bed can ensure that the pull rods of the steering gear sample piece are fixed at the same position during each impact test, thereby ensuring the test scientificity and the test precision.)
1. A diverter impact test stand, comprising:
a drop hammer impact device (1);
a sample fixing device (2) arranged below the drop hammer impact device (1), wherein the sample fixing device (2) is configured to be capable of fixing a steering gear sample (100) according to a real vehicle state, and the sample fixing device (2) is further configured to be adjustable in rigidity;
a tie rod holding device (3) provided on the sample fixture (2), the tie rod holding device (3) being for clamping a tie rod (101) of the steering gear sample (100), the tie rod holding device (3) being configured to be able to hold positioning accuracy of the tie rod (101) before impact, and being further configured to be able to achieve rapid release of the tie rod (101) at the time of impact.
2. The steering gear impact test stand according to claim 1, characterized in that the sample piece fixing device (2) comprises a fixing tailstock (21), a rigidity adjusting platform (22) is arranged on the fixing tailstock (21), a sample piece mounting assembly (23) is arranged on the rigidity adjusting platform (22), and the sample piece mounting assembly (23) is used for mounting the steering gear sample piece (100).
3. The steering gear impact test stand according to claim 2, wherein the rigidity adjusting platform (22) comprises a platform bottom plate (221), a U-shaped square pipe (222) and a transition plate (223), the horizontal part of the U-shaped square pipe (222) is connected to the platform bottom plate (221), two vertical parts of the U-shaped square pipe (222) are connected to the transition plate (223), one side of the transition plate (223) far away from the platform bottom plate (221) is connected to the sample piece mounting assembly (23), and the rigidity of the U-shaped square pipe (222) is adjustable.
4. The steering gear impact test stand according to claim 3, characterized in that the stiffness adjusting platform (22) further comprises an arc-shaped reinforcing rib (224), the arc-shaped reinforcing rib (224) is arranged on one side of the U-shaped square pipe (222) in parallel, one end of the arc-shaped reinforcing rib (224) is connected to the platform bottom plate (221), and the other end of the arc-shaped reinforcing rib is connected to the transition plate (223).
5. The steering gear impact test stand according to claim 1, wherein the tie rod holding device (3) comprises a connecting pipe (31) and a clamping assembly (32) for clamping the tie rod (101), one end of the connecting pipe (31) is detachably connected with the sample piece fixing device (2) through a first positioning screw (33) and can be mutually adsorbed; the other end of the connecting pipe (31) and the clamping assembly (32) are detachably connected through a second positioning screw (34) and can be mutually adsorbed, and the length of the connecting pipe (31) in the horizontal direction and the length of the connecting pipe in the vertical direction are both adjustable.
6. The steering gear impact test stand according to claim 5, characterized in that the connecting tube (31) comprises a vertically connected vertical adjustment tube (311) and a horizontal adjustment tube (312), the vertical adjustment tube (311) being connected to the sample holder (2) and the horizontal adjustment tube (312) being connected to the clamping assembly (32).
7. The steering gear impact test stand according to claim 6, characterized in that a magnet (35) is provided on at least one of the vertical adjustment tube (311) and the sample holder (2), and a magnet (35) is provided on at least one of the horizontal adjustment tube (312) and the clamping assembly (32).
8. The steering gear impact test stand according to claim 6, characterized in that the connection tube (31) further comprises a right angle elbow (313), one end of the right angle elbow (313) being screwed to the vertical adjustment tube (311) and the other end being screwed to the horizontal adjustment tube (312).
9. The steering gear impact test stand according to claim 6, characterized in that the clamping assembly (32) comprises a holding plate (321) and a clamping block (322), one end of the holding plate (321) being connected to the level adjustment tube (312) and the other end being connected to the clamping block (322), the clamping block (322) being used for clamping the tie rod (101).
10. Steering gear impact test stand according to claim 9, characterized in that the clamping block (322) is U-shaped or horseshoe-shaped.
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a steering gear impact test bed.
Background
In the design of damaged chains of various parts of an automobile chassis, a steering gear is usually damaged before bearing parts such as a half shaft and the like, so that the automobile loses normal steering function (deviation or corner change), and a user is informed that the automobile needs to be overhauled immediately instead of a major accident that the bearing parts such as the half shaft and the like are directly broken to cause automobile damage and death. The most common damage form of the steering gear is curb impact, and the weakest link of the steering gear is the joint of the inner pull rod and the outer pull rod during curb impact, so that the chassis bench test is necessary for impacting the inner pull rod and the outer pull rod of the steering gear.
The steering gear impact test generally adopts a drop hammer impact form, and the steering gear is vertically fixed on a test bed according to real vehicle space arrangement parameters, so that the drop hammer sequentially impacts a steering gear body, a steering gear inner tie rod assembly and a steering gear outer tie rod assembly from different heights. Because the inner and outer pull rods need to meet the functional target of up-and-down and front-and-back movement of the wheels, the inner and outer pull rods are connected by adopting a ball head so as to swing. When the steering gear is vertically fixed, a clamping device is required to be arranged on the steering gear impact test bed to keep the pull rod fixed due to the fact that the ball head is easy to lose stability.
The existing steering gear impact test bed mainly has two forms: the first type is that a support arm is arranged on a test bed, a hole is formed in the support arm, a pull rod penetrates through the hole to realize the position maintenance of the pull rod, the pull rod is firmly sleeved in the hole during impact, no movement space exists, and the test bed is not in line with the actual situation. The second is to use a rotating device, one end of which is added with a pull rod, and the other end is impacted by a drop hammer, and the mechanism can rotate around a rotating fulcrum during impact, so as to realize the position maintenance of the pull rod and have a certain degree of freedom, and the pull rod can move in a fixed direction during impact.
The free motion of pull rod when the impact can not be guaranteed to above two kinds of modes, and the operating mode of impact is not according with the operating mode of free motion when real car is strikeed, and at this moment, impact load also can have great discrepancy with real car impact load. In addition, both schemes can not ensure that the pull rod is in the same position when impacting each time. Because the impact is essentially potential energy converted into kinetic energy, impact load is generated after impact, the impact load is obviously related to impact duration besides the potential energy, and the impact energy, the impact position and the surface hardness comprehensively influence the impact time, so that the repeatability of the impact can be ensured only by ensuring that the pull rod is in the same position during each impact, otherwise, the measured impact load has larger difference even under the same potential energy, and even the condition that the impact load with low potential energy is larger than the impact load with high potential energy occurs, so that the test result is inaccurate.
Disclosure of Invention
One object of the present invention is to provide an impact test stand for a steering gear, which can ensure that the pull rods of a steering gear sample are fixed at the same position during each impact test, and realize the free movement of the pull rods during the impact test, thereby improving the accuracy of the test result.
In order to achieve the purpose, the invention adopts the following technical scheme:
a diverter impact test stand, comprising:
a drop hammer impact device;
the sample piece fixing device is arranged below the drop hammer impact device, is configured to be capable of fixing a steering gear sample piece according to a real vehicle state, and is also configured to be adjustable in rigidity;
and a tie rod holding device provided on the sample fixing device, the tie rod holding device being used for clamping a tie rod of the steering gear sample, the tie rod holding device being configured to be able to hold positioning accuracy of the tie rod before an impact and also being configured to be able to achieve rapid release of the tie rod at the time of the impact.
According to the preferable technical scheme, the sample piece fixing device comprises a fixed tailstock, a rigidity adjusting platform is arranged on the fixed tailstock, a sample piece mounting assembly is arranged on the rigidity adjusting platform, and the sample piece mounting assembly is used for mounting the steering gear sample piece.
As an optimal technical scheme, the rigidity adjusting platform comprises a platform bottom plate, a U-shaped square pipe and a transition plate, the horizontal part of the U-shaped square pipe is connected with the platform bottom plate, two vertical parts of the U-shaped square pipe are connected with the transition plate, the transition plate is far away from one side of the platform bottom plate to be connected with the sample piece installing assembly, and the rigidity of the U-shaped square pipe is adjustable.
As an optimal technical scheme, the rigidity adjusting platform further comprises arc-shaped reinforcing ribs, the arc-shaped reinforcing ribs are arranged on one side of the U-shaped square pipe in parallel, one ends of the arc-shaped reinforcing ribs are connected to the platform bottom plate, and the other ends of the arc-shaped reinforcing ribs are connected to the transition plate.
As a preferred technical scheme, the pull rod holding device comprises a connecting pipe and a clamping assembly for clamping the pull rod, wherein one end of the connecting pipe is detachably connected with the sample piece fixing device through a first positioning screw and can be mutually adsorbed; the other end of the connecting pipe with the centre gripping subassembly passes through the detachable connection of second set screw to can adsorb each other, the length of connecting pipe on the horizontal direction and the length on the vertical direction are all adjustable.
As the preferred technical scheme, the connecting pipe comprises a vertical adjusting pipe and a horizontal adjusting pipe which are vertically connected, the vertical adjusting pipe is connected with the sample piece fixing device, and the horizontal adjusting pipe is connected with the clamping assembly.
As a preferred technical scheme, at least one of the vertical adjusting tube and the sample piece fixing device is provided with a magnet, and at least one of the horizontal adjusting tube and the clamping assembly is provided with a magnet.
As a preferred technical scheme, the connecting pipe further comprises a right-angle elbow, one end of the right-angle elbow is in threaded connection with the vertical adjusting pipe, and the other end of the right-angle elbow is in threaded connection with the horizontal adjusting pipe.
According to a preferable technical scheme, the clamping assembly comprises a holding plate and a clamping block, one end of the holding plate is connected to the horizontal adjusting pipe, the other end of the holding plate is connected to the clamping block, and the clamping block is used for clamping the pull rod.
As a preferred technical scheme, the clamping assembly comprises a holding plate and a clamping block, and the clamping block is U-shaped or horseshoe-shaped.
Compared with the prior art, the invention has the advantages and beneficial effects that:
the invention provides a steering gear impact test bed which comprises a drop hammer impact device, a sample piece fixing device and a pull rod holding device, wherein the drop hammer impact device is used for realizing impact on a steering gear sample piece; the sample piece fixing device is arranged below the drop hammer impact device, can fix the steering gear sample piece according to the real vehicle state, and has adjustable rigidity so as to enable the rigidity of the steering gear sample piece to be consistent with the rigidity of a real vehicle front auxiliary frame system; the pull rod retaining device is arranged on the sample piece fixing device and used for clamping a pull rod of a steering gear sample piece, the pull rod retaining device can realize accurate positioning of the pull rod when the steering gear sample piece is installed, can realize the positioning accuracy of the pull rod before impact, and can also realize disconnection to quickly release the pull rod when impact occurs, so that free movement of the pull rod when the steering gear sample piece is impacted is realized. The steering gear impact test bed can ensure that the pull rod of the steering gear sample piece is fixed at the same position during each impact test, so that the impact load is completely positively correlated with the impact energy, the test scientificity is ensured, and the test precision is improved.
Drawings
FIG. 1 is a schematic structural diagram of a diverter impact test stand provided in accordance with an embodiment of the present invention;
fig. 2 is a schematic structural view of a drop hammer impact device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a sample holder according to an embodiment of the present invention;
FIG. 4 is an exploded view of FIG. 3;
FIG. 5 is a schematic structural view of a tie rod retaining device according to an embodiment of the present invention;
fig. 6 is an exploded view of fig. 5.
In the figure:
1-drop hammer impact device;
11-a frame; 12-a hammer lifting device; 13-weight; 14-weight placing platform; 15-impact hammer head; 16-a base plate;
2-sample piece fixing device;
21-fixed tailstock; 22-a stiffness adjustment platform; 23-a sample mounting assembly;
211-tailstock base plate; 212-tailstock riser; 213-vertical plate reinforcing ribs;
221-a platform floor; 222-a U-shaped square tube; 223-a transition plate; 224-arc reinforcing ribs; 225-square tube reinforcing ribs;
231-a mounting plate; 232-mounting the upright post;
3-a tie rod holding device;
31-a connecting tube; 32-a clamping assembly; 33-a first set screw; 34-a second set screw; 35-a magnet;
311-vertical adjustment tubes; 312-horizontal adjustment tube; 313-right angle bend; 314-vertical backup nuts; 315-horizontal back-up nuts; 316-embedded groove; 317-a first positioning plate; 318-second positioning plate;
321-a holding plate; 322-a clamping block;
3211-a second connecting threaded hole; 3212-installing a threaded hole;
3221-counter sink; 3222-mounting bolts;
100-a diverter sample; 101-a pull rod.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The present embodiment provides a steering gear impact test stand, which includes a drop
The tie
Specifically, the drop
As shown in fig. 3, the
The
Preferably, the stiffness-adjusting
Optionally, square
The sample
In the present embodiment, as shown in fig. 5 and fig. 6, the pull
Further, as shown in fig. 6, the
Further, a
In this embodiment, the
The clamping
Further, the
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
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