Special-shaped steel plate spring assembly of semitrailer

Abstract

The utility model provides a semitrailer special-shaped steel plate spring assembly which comprises a main spring assembly, an auxiliary spring assembly and a fixing mechanism, and the main spring assembly is installed above the auxiliary spring assembly. The main spring assembly comprises a plurality of main spring pieces which are sequentially arranged in a laminated mode from top to bottom, and the two ends of the secondary top main spring piece are provided with downward bent hook structures. The auxiliary spring assembly comprises a plurality of auxiliary spring pieces which are sequentially arranged in a laminated mode from top to bottom, and a spring eye is arranged at the end of the top auxiliary spring piece. The thickness of the auxiliary reed is greater than that of the main reed; the fixing mechanism comprises a center bolt assembly and a clamp assembly, the center bolt assembly comprises a center bolt and a fastening nut, bolt through holes are formed in the main reeds and the auxiliary reeds, and the center bolt sequentially penetrates through the bolt through holes in the main reeds and the auxiliary reeds and then is connected with the fastening nut; the clamp assembly comprises clamp pieces arranged in the middles of the two sides of the main spring assembly. The special-shaped steel plate spring assembly of the semitrailer can meet the high-load requirement when the semitrailer is in heavy load and ensure the driving smoothness when the semitrailer is in light load.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile leaf spring manufacturing, in particular to a special-shaped leaf spring assembly for a semitrailer. Background Art

[0002] Leaf springs are one of the key components in the suspension system of semi-trailers. They are elastic elements that connect the frame and the axle. They play a role in reducing the impact load transmitted to the vehicle body due to the unevenness of the road surface and attenuating the vibration of the vehicle body, thereby improving the smoothness of vehicle driving and the service life of related components. At present, semi-trailer leaf springs usually adopt a multi-leaf equal-section leaf spring structure. Due to its simple structure and easy use, it has been widely used in semi-trailer suspension systems at home and abroad. Traditional semi-trailer leaf springs are mainly designed based on the semi-trailer's cargo capacity. Although they can meet the high load requirements when the semi-trailer is fully loaded, due to the rigidity and fixed frequency, the change in the semi-trailer's loading mass is used to cause excessive suspension polarization, affecting the vehicle's driving smoothness and driving comfort.

[0003] Therefore, it is necessary to improve the leaf springs for semi-trailers in order to achieve the goal of taking into account both the load-bearing capacity of the leaf springs and the smoothness of the vehicle's ride. Utility Model Content

[0004] In order to better solve the above problems, the utility model provides a semi-trailer special-shaped leaf spring assembly to meet the high load requirements of the semi-trailer when it is heavily loaded and ensure the driving smoothness when it is lightly loaded.

[0005] To achieve the above-mentioned purpose, an embodiment of the utility model provides a semi-trailer special-shaped leaf spring assembly, including a main spring assembly, a secondary spring assembly and a fixing mechanism, wherein the main spring assembly is installed above the secondary spring assembly; the main spring assembly includes a plurality of main spring leaves stacked in sequence from top to bottom, and both ends of the secondary top main spring leaf have downward bending hook structures; the secondary spring assembly includes a plurality of secondary spring leaves stacked in sequence from top to bottom, and the end of the top secondary spring leaf is provided with a rolled ear; the thickness of the secondary spring leaf is greater than the thickness of the main spring leaf; the fixing mechanism includes a central bolt assembly and a clamp assembly, the central bolt assembly includes a central bolt and a fastening nut, bolt through holes are provided on the main spring leaf and the secondary spring leaf, and the central bolt passes through the bolt through holes on the plurality of main spring leaves and the plurality of secondary spring leaves in sequence and is connected with the fastening nut; the clamp assembly includes clamping members arranged in the middle of both sides of the main spring assembly.

[0006] Optionally, the cross-sectional areas of the plurality of main spring leaves of the main spring assembly are equal, and the lengths decrease sequentially from top to bottom.

[0007] Optionally, the multiple auxiliary spring leaves of the auxiliary spring assembly are half spring leaves, one end of the half spring leaf is fixed to the main spring assembly through a central bolt assembly, and the other end corresponds to one end of the main spring assembly.

[0008] Optionally, the auxiliary spring assembly includes two auxiliary spring pieces with equal cross-sectional areas, and the end of the bottom auxiliary spring piece is chamfered.

[0009] Optionally, a pad is provided between the main spring assembly and the auxiliary spring assembly.

[0010] The semi-trailer special-shaped leaf spring assembly of the embodiment of the utility model is formed by stacking a main spring, a secondary spring and a shock absorber bracket and fastening them with a center bolt. As the load of the semi-trailer increases, the upper main spring is first subjected to pressure and then begins to contact the lower secondary spring. The secondary spring then bears pressure to support the main spring. The stiffness and characteristics of the leaf spring can change with the pressure, which can meet the high load requirements of the semi-trailer when it is heavily loaded, and can also improve the vehicle's driving smoothness and comfort when the semi-trailer is lightly loaded. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 It is a structural schematic diagram of a semi-trailer special-shaped leaf spring assembly according to an embodiment of the utility model;

[0013] Figure 2 The utility model is a top view of a semi-trailer special-shaped leaf spring assembly according to an embodiment of the utility model.

[0014] Reference numerals:

[0015] 1. First main reed; 2. Second main reed; 3. First auxiliary reed; 4. Second auxiliary reed; 5. Bending hook structure; 6. Roll ear; 7. Clamp; 8. Center bolt; 9. Fastening nut; 10. Pad. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited to the basic implementation disclosed below.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0018] like Figure 1-2 As shown, the semi-trailer special-shaped leaf spring assembly of the utility model embodiment includes a main spring assembly, a secondary spring assembly, and a fixing mechanism, wherein the main spring assembly is installed above the secondary spring assembly; the main spring assembly includes a plurality of main spring leaves stacked in sequence from top to bottom, the secondary spring assembly includes a plurality of secondary spring leaves stacked in sequence from top to bottom, the number of the main spring leaves is greater than the number of the secondary spring leaves, and the thickness of the secondary spring leaves is greater than the thickness of the main spring leaves; the fixing mechanism includes a central bolt assembly and a clamp assembly, the central bolt assembly includes a central bolt 8 and a fastening nut 9, bolt through holes are provided on the main spring leaves and the secondary spring leaves, the central bolt 8 passes through the bolt through holes on the plurality of main spring leaves and the plurality of secondary spring leaves in sequence and is connected to the fastening nut 9; the clamp assembly includes a clamp 7 arranged in the middle of both sides of the main spring assembly.

[0019] In this embodiment, the main spring assembly includes 10 main springs, which are the first main spring 1, the second main spring 2 to the tenth main spring from top to bottom, and the two ends of the second main spring 2 (the second top main spring) have downward bending hook structures 5. The cross-sectional areas of the 10 main springs are equal, and the lengths decrease from top to bottom, and the main spring assembly as a whole is in the shape of an inverted triangle. Here, the length of the two ends of the second main spring 2 after bending downward is less than the length of the first main spring 1, forming a slide plate structure. The slide plate structure can better increase the stiffness of the leaf spring assembly as the pressure changes, and improve the overall strength of the leaf spring. The number of clamps 7 can be one group, two groups or more, and the clamp fixation of multiple main springs can be achieved. The figure shows the situation where a group of clamps 7 is set, and the upper 5 main springs are clamped and fixed in the middle of the main spring assembly (at both ends of the fifth main spring). The clamp member 7 may be a U-shaped plate-shaped clamp structure, with both ends facing downward and provided with round holes, and screws may be installed in the round holes and then tightened with nuts to achieve clamp fixation.

[0020] The auxiliary spring assembly includes multiple auxiliary springs that are half springs, one end of which is a fixed end, and is provided with a bolt passing therethrough, and is used to be fixedly connected to the main spring assembly through a central bolt assembly; the other ends of the multiple leaf springs are oriented in the same direction, and all correspond to one end of the main spring assembly. The number of auxiliary springs shown in the figure can be 2, from top to bottom, they are the first auxiliary spring 3 and the second auxiliary spring 4, the cross-sectional areas of the two auxiliary springs are equal, and the length of the second auxiliary spring 4 is less than the length of the first auxiliary spring 3. The end of the first auxiliary spring 3 (top auxiliary spring) has a rolled ear 6, and the end of the second auxiliary spring 4 (bottom auxiliary spring) is rolled and angled, which can improve the stress distribution at the end and increase the elasticity.

[0021] The thickness of the above-mentioned multiple main reeds is equal, the thickness of the multiple auxiliary reeds is equal, the thickness of the main reed is smaller than the thickness of the auxiliary reed, and the auxiliary reed can provide effective support for the main reed.

[0022] Optionally, a gasket is provided between adjacent main springs, a gasket is provided between adjacent auxiliary springs, and a backing plate 10 is also provided between adjacent main springs and auxiliary springs. The figure shows two backing plates, and in actual application, the backing plates may be one or three. Also, in other embodiments, the number of springs included in the main spring assembly and the auxiliary spring assembly may be appropriately adjusted according to the type and load requirements of the semi-trailer used.

[0023] In actual application scenarios, the main spring leaves and auxiliary spring leaves in the semi-trailer special-shaped leaf spring assembly of the utility model embodiment can be made of high-stress hot-rolled spring flat steel, and are processed through main processes such as end rolling, hot forming, heat treatment, shot peening, and assembly. Both ends are rolled with rib grooves, which can make adjacent main spring leaves match each other and adjacent auxiliary spring leaves fit closely, so that the stress distribution between adjacent spring leaves is more uniform, with high adaptability, which can avoid dislocation of leaf springs under complex road conditions and ensure the safety of the vehicle.

[0024] The semi-trailer's special-shaped leaf spring assembly has both sides of the main spring warped upward, and the warping range of multiple main springs gradually decreases from top to bottom; multiple auxiliary springs are slightly warped upward or straightened, and in the overall structure of the main spring and auxiliary springs, the warping range of the springs gradually decreases from top to bottom to straight, and the lower spring can form an effective support for the upper spring to ensure the overall strength of the leaf spring assembly. When not installed and used, the main spring is not under pressure, and both sides of the main spring are in a warped state (not shown in the figure); during installation and use, if the semi-trailer is in an unloaded or lightly loaded condition, the main spring is under pressure first, and if the load increases, the main spring begins to contact the auxiliary spring after being compressed, and the auxiliary spring begins to bear pressure, and the overall stiffness of the leaf spring increases accordingly, and the leaf spring characteristic is nonlinear; when the semi-trailer is in a heavy or overloaded condition, the main spring and auxiliary spring will be completely in contact as a whole, that is, Figure 1In the structural state shown in , the leaf spring characteristics become linear. The characteristics and stiffness of the semi-trailer's special-shaped leaf spring assembly can change with the pressure bearing capacity, which can not only meet the high load requirements when the vehicle is heavily loaded, but also ensure the driving smoothness and driving comfort when the vehicle is unloaded or lightly loaded.

[0025] It should be pointed out that, according to the needs of implementation, the various components described in the embodiments of the present utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present utility model.

[0026] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A semi-trailer special-shaped leaf spring assembly, characterized in that: The invention comprises a main spring assembly, a secondary spring assembly and a fixing mechanism, wherein the main spring assembly is installed above the secondary spring assembly; the main spring assembly comprises a plurality of main spring sheets stacked in sequence from top to bottom, and both ends of the secondary top main spring sheet have downward bending hook structures; the secondary spring assembly comprises a plurality of secondary spring sheets stacked in sequence from top to bottom, and the end of the top secondary spring sheet is provided with a curling ear; the thickness of the secondary spring sheet is greater than the thickness of the main spring sheet; The fixing mechanism includes a central bolt assembly and a clamp assembly, the central bolt assembly includes a central bolt and a fastening nut, the main spring and the auxiliary spring are provided with bolt through holes, the central bolt passes through the bolt through holes on a plurality of main springs and a plurality of auxiliary springs in sequence and is connected with the fastening nut; the clamp assembly includes clamp parts arranged in the middle of both sides of the main spring assembly.

2. The semi-trailer special-shaped leaf spring assembly according to claim 1, characterized in that: The cross-sectional areas of the plurality of main spring sheets of the main spring assembly are equal, and the lengths thereof decrease sequentially from top to bottom.

3. The semi-trailer special-shaped leaf spring assembly according to claim 1, characterized in that: The multiple auxiliary spring leaves of the auxiliary spring assembly are half spring leaves, one end of the half spring leaf is fixed to the main spring assembly through a central bolt assembly, and the other end corresponds to one end of the main spring assembly.

4. The semi-trailer special-shaped leaf spring assembly according to claim 3, characterized in that: The auxiliary spring assembly comprises two auxiliary spring pieces with equal cross-sectional areas, and the end of the bottom auxiliary spring piece is cut at an angle.

5. A semi-trailer special-shaped leaf spring assembly according to any one of claims 1 to 4, characterized in that: A pad is arranged between the main spring assembly and the auxiliary spring assembly.

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