阅读说明：本技术 高强度汽车驾驶室后悬置装置 (High-strength rear suspension device for automobile cab ) 是由 杨波 杨益奎 于 2020-12-29 设计创作，主要内容包括：本发明公开了高强度汽车驾驶室后悬置装置,包括后悬车身连接支架、后悬下支架以及橡胶缓冲隔震块；所述后悬车身连接支架的顶端设置有连接件；所述连接件包括相对设置的两个竖直板以及横杆；所述竖直板的下端焊接固定在后悬车身连接支架的顶端面上,所述后悬车身连接支架和竖直板都为钢制件,且所述钢制件包括以下重量百分比成分制成：C0.25-0.5％、Mn0.1-0.2％、Ti0.05-0.1％、Si0.35-0.45％、Cr0.1-0.3％、Mo0.1-0.3％、P≤0.02％、S≤0.015％,余量为铁和不可避免的杂质。本发明的高强度汽车驾驶室后悬置装置,在保证钢制件整体力学性能的基础上,大大提高了钢制件的焊接性能,保证竖直板和后悬车身连接支架焊接强度,进而提高驾驶室后悬置装置整体结构强度,保证使用安全性,提高使用寿命。(The invention discloses a high-strength rear suspension device of an automobile cab, which comprises a rear suspension automobile body connecting bracket, a rear suspension lower bracket and a rubber buffer shock insulation block, wherein the rear suspension automobile body connecting bracket is fixedly connected with the rear suspension lower bracket; the top end of the rear suspension vehicle body connecting bracket is provided with a connecting piece; the connecting piece comprises two vertical plates and a cross bar which are oppositely arranged; the lower end of the vertical plate is welded and fixed on the top end face of the rear suspension vehicle body connecting support, the rear suspension vehicle body connecting support and the vertical plate are both made of steel, and the steel comprises the following components in percentage by weight: 0.25-0.5% of C, 0.1-0.2% of Mn0.05-0.1% of Ti0.35-0.45% of Si, 0.1-0.3% of Cr0.1-0.3% of Mo0.1-0.3%, less than or equal to 0.02% of P, less than or equal to 0.015% of S, and the balance of iron and inevitable impurities. The high-strength rear suspension device for the automobile cab greatly improves the welding performance of the steel part on the basis of ensuring the overall mechanical performance of the steel part, ensures the welding strength of the vertical plate and the rear suspension body connecting bracket, further improves the overall structural strength of the rear suspension device for the cab, ensures the use safety and prolongs the service life.)

1. The high-strength rear suspension device for the automobile cab comprises a rear suspension automobile body connecting support (1), a rear suspension lower support (2) and a rubber buffer shock insulation block (3) arranged between the rear suspension automobile body connecting support (1) and the rear suspension lower support (2); the top end of the rear suspension vehicle body connecting bracket (1) is provided with a connecting piece (11); the connecting piece (11) comprises two vertical plates (111) which are oppositely arranged; a cross bar (112) is arranged between the top ends of the two vertical plates (111); the lower end of the vertical plate (111) is welded and fixed on the top end face of the rear suspension vehicle body connecting support (1), and the rear suspension vehicle body connecting support (1) and the vertical plate (111) are both made of steel, and the steel comprises the following components in percentage by weight:

0.25 to 0.5 percent of C, 0.1 to 0.2 percent of Mn0.05 to 0.1 percent of Ti0.35 to 0.45 percent of Si, 0.1 to 0.3 percent of Cr0.1 to 0.3 percent of Mo0.1 to 0.3 percent, less than or equal to 0.02 percent of P, less than or equal to 0.015 percent of S, and the balance of iron and inevitable impurities.

2. The high-strength rear suspension device for the automobile cab as claimed in claim 1, wherein the steel member is prepared by a method comprising:

i, carrying out molten iron desulphurization and converter smelting, and controlling the molten steel components within the percentage composition range of the steelwork as claimed in claim 1

II, preparing the molten steel in the step a into a finished product through the main steps of continuous casting → rough rolling → finish rolling → cooling → curling; wherein, a continuous casting blank with the thickness of 220-250 mm is cast continuously, and after the slab is soaked at the temperature of 1220-1250 ℃, rough rolling is carried out by adopting 4-6 times; roughly rolling the blank into an intermediate blank with the thickness of 45-55 mm, then finely rolling the intermediate blank by a 4-6 frame, wherein the finish rolling temperature is 830-860 ℃, rapidly cooling the intermediate blank to 550-600 ℃ at a cooling speed of 40-60 ℃/s, and coiling to obtain a finished product with the thickness of 5-15 mm.

Technical Field

The invention relates to the technical field of cab rear suspension devices, in particular to a high-strength automobile cab rear suspension device.

Background

The cab suspension device is an intermediate device for connecting the cab to the chassis of the automobile, so as to isolate and reduce the adverse effects on the cab caused by various vibrations from an engine and the ground during driving and support the cab, thereby improving the comfort and safety of driving in the cab. The cab rear suspension device comprises a rear suspension vehicle body connecting support, a rubber buffer shock insulation block and a suspension lower support, wherein a connecting piece consisting of two vertical plates and a cross rod is arranged at the top end of the rear suspension vehicle body connecting support and used for connecting a locking mechanism. The vertical plate is fixed on the rear suspension vehicle body connecting support through welding, and the firmness of the vertical plate welding is directly related to the overall use safety of the rear suspension device. Based on this, how to design the high-strength rear suspension device of the automobile cab is the technical problem to be solved by the invention.

Disclosure of Invention

The invention provides a high-strength rear suspension device of an automobile cab, aiming at the defects of the prior art.

The invention solves the technical problems through the following technical means:

the high-strength rear suspension device for the automobile cab comprises a rear suspension automobile body connecting support, a rear suspension lower support and a rubber buffer shock insulation block arranged between the rear suspension automobile body connecting support and the rear suspension lower support; the top end of the rear suspension vehicle body connecting bracket is provided with a connecting piece; the connecting piece comprises two vertical plates which are oppositely arranged; a cross bar is arranged between the top ends of the two vertical plates; the lower end of the vertical plate is welded and fixed on the top end face of the rear suspension vehicle body connecting support, the rear suspension vehicle body connecting support and the vertical plate are both made of steel, and the steel comprises the following components in percentage by weight:

0.25-0.5% of C, 0.1-0.2% of Mn0.05-0.1% of Ti0.35-0.45% of Si, 0.1-0.3% of Cr0.1-0.3% of Mo0.1-0.3%, less than or equal to 0.02% of P, less than or equal to 0.015% of S, and the balance of iron and inevitable impurities.

The preparation method of the steel part comprises the following steps:

i, carrying out molten iron desulphurization and converter smelting, and controlling the molten steel components within the percentage composition range of the steelwork as claimed in claim 1

II, preparing the molten steel in the step a into a finished product through the main steps of continuous casting → rough rolling → finish rolling → cooling → curling; wherein, a continuous casting blank with the thickness of 220-250 mm is cast continuously, and after the slab is soaked at the temperature of 1220-1250 ℃, rough rolling is carried out by adopting 4-6 times; roughly rolling the blank into an intermediate blank with the thickness of 45-55 mm, then finely rolling the intermediate blank by a 4-6 frame, wherein the finish rolling temperature is 830-860 ℃, rapidly cooling the intermediate blank to 550-600 ℃ at a cooling speed of 40-60 ℃/s, and coiling to obtain a finished product with the thickness of 5-15 mm.

The invention has the advantages that: the high-strength rear suspension device for the automobile cab greatly improves the welding performance of the steel part on the basis of ensuring the overall mechanical performance of the steel part, ensures the welding strength of the vertical plate and the rear suspension body connecting bracket, further improves the overall structural strength of the rear suspension device for the cab, ensures the use safety and prolongs the service life.

Drawings

Fig. 1 is a schematic structural diagram of a rear suspension device according to the present invention.

Fig. 2 is a schematic structural view of the connector of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.

Referring to the attached drawings, the high-strength rear suspension device of the automobile cab comprises a rear suspension automobile body connecting support 1, a rear suspension lower support 2 and a rubber buffer shock insulation block 3 arranged between the rear suspension automobile body connecting support 1 and the rear suspension lower support 2; the top end of the rear suspension vehicle body connecting bracket 1 is provided with a connecting piece 11; the connecting piece 11 comprises two vertical plates 111 which are oppositely arranged; a cross bar 112 is arranged between the top ends of the two vertical plates 111; the lower end of the vertical plate 111 is welded and fixed on the top end face of the rear suspension vehicle body connecting bracket 1, and the rear suspension vehicle body connecting bracket 1 and the vertical plate 111 are both made of steel;

example 1, the steelwork comprises the following components in percentage by weight:

0.25% of C, 0.1% of Mn0.05%, 0.05% of Ti0.35% of Si, 0.1% of Cr0.1%, 0.1% of Mo0.1%, 0.010% of P, 0.010% of S, and the balance of iron and inevitable impurities.

The preparation method of the steel part comprises the following steps:

i, carrying out molten iron desulphurization and converter smelting, and controlling the molten steel components within the percentage composition range of the steelwork as claimed in claim 1

II, preparing the molten steel in the step a into a finished product through the main steps of continuous casting → rough rolling → finish rolling → cooling → curling; wherein, the continuous casting is carried out to form a continuous casting billet with the thickness of 220mm, and the slab is subjected to rough rolling by 4 times after soaking at 1220 ℃; roughly rolling the blank into an intermediate blank with the thickness of 45mm, finely rolling the intermediate blank by a 4-frame, wherein the finish rolling temperature is 830 ℃, rapidly cooling the intermediate blank to 550 ℃ at the cooling speed of 40 ℃/s, and coiling the intermediate blank to obtain a finished product with the thickness of 5 mm.

Example 2, the steelwork comprises the following components in percentage by weight:

0.38% of C, 0.15% of Mn0.08%, 0.08% of Ti0.40% of Si, 0.2% of Cr0.2%, 0.2% of Mo0.2%, 0.015% of P, 0.012% of S and the balance of iron and inevitable impurities.

The preparation method of the steel part comprises the following steps:

i, carrying out molten iron desulphurization and converter smelting, and controlling the molten steel components within the percentage composition range of the steelwork as claimed in claim 1

II, preparing the molten steel in the step a into a finished product through the main steps of continuous casting → rough rolling → finish rolling → cooling → curling; wherein, a continuous casting blank with the thickness of 235mm is cast continuously, and the slab is subjected to rough rolling for 5 times after soaking at the temperature of 1235 ℃; roughly rolling into an intermediate blank with the thickness of 50mm, and then finely rolling by a 5-frame, wherein the final rolling temperature is 845 ℃, the intermediate blank is rapidly cooled to 575 ℃ at the cooling speed of 50 ℃/s, and a finished product is obtained by coiling, and the thickness of the finished product is 10 mm.

Example 3, the steelwork comprises the following components in percentage by weight:

0.5% of C, 0.2% of Mn0.2%, 0.1% of Ti0.45%, 0.3% of Cr0.3%, 0.3% of Mo0.3%, 0.02% of P, 0.015% of S, and the balance of iron and inevitable impurities.

The preparation method of the steel part comprises the following steps:

i, carrying out molten iron desulphurization and converter smelting, and controlling the molten steel components within the percentage composition range of the steelwork as claimed in claim 1

II, preparing the molten steel in the step a into a finished product through the main steps of continuous casting → rough rolling → finish rolling → cooling → curling; wherein, the continuous casting is carried out to form a continuous casting billet with the thickness of 250mm, and the slab is subjected to rough rolling by 6 times after being soaked at 1250 ℃; rough rolling into an intermediate blank with the thickness of 55mm, and then finish rolling by a 6-frame, wherein the finish rolling temperature is 860 ℃, the intermediate blank is rapidly cooled to 600 ℃ at the cooling speed of 60 ℃/s, and a finished product with the thickness of 15mm is obtained by coiling.

The following table shows the results of the performance tests on the steel articles of examples 1-3

By reducing the content of C element, the welding performance of the steel part is improved, and then the solid solution strengthening effect of ferrite is improved by adding Si element, so that the overall mechanical performance of the steel part is improved, the problem of strength reduction of the steel part caused by reduction of C element is solved, on the basis of ensuring the overall mechanical performance of the steel part, the welding performance of the steel part is greatly improved, the welding strength of a vertical plate and a rear suspension vehicle body connecting support is ensured, the overall structural strength of a cab rear suspension device is improved, the use safety is ensured, and the service life is prolonged; meanwhile, TiC and Ti (C, N) particles are precipitated through micro-titanium treatment, and austenite crystal grains are limited to grow in the heating process, so that a fine and uniform structure is obtained, the strength and low-temperature toughness of the steel are improved, and the welding performance is improved; on the other hand, in the austenite/ferrite phase transformation process, TiC and Ti (C, N) particles are precipitated, and the strength of the steel is improved.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.