CN213393277U - Variable cross-section steel plate spring of semitrailer - Google Patents
Variable cross-section steel plate spring of semitrailer Download PDFInfo
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- CN213393277U CN213393277U CN202021742189.9U CN202021742189U CN213393277U CN 213393277 U CN213393277 U CN 213393277U CN 202021742189 U CN202021742189 U CN 202021742189U CN 213393277 U CN213393277 U CN 213393277U
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Abstract
The utility model discloses a semitrailer variable cross section leaf spring, it includes the first spring leaf and the second spring leaf that anticreep round pin and range upon range of laminating set up, and the transition lamellar body of second spring leaf reduces along the direction thickness towards anticreep round pin gradually, and the thickness dimension of the one end of the transition lamellar body that is close to second spring leaf body is greater than the radius dimension of anticreep round pin, and the thickness dimension of the one end of keeping away from second spring leaf body of transition lamellar body is less than the radius dimension of anticreep round pin. The utility model discloses in not influencing under the prerequisite of leaf spring normal use, reduce the conflict area of anticreep round pin and second spring leaf, reduced the impact force to the anticreep round pin. And the thickness dimension of the end of the transition sheet body far away from the second spring piece body is smaller than the radius dimension of the anti-slip pin, and the anti-slip pin is guided to move towards the surface of the first spring piece or the second spring piece beyond the end part of the transition sheet body, so that the anti-slip pin is not directly abutted against the end part of the second spring piece, and the service life of the anti-slip pin is prolonged.
Description
Technical Field
The utility model relates to an automobile-used suspension technical field especially relates to a semitrailer variable cross section leaf spring.
Background
With the development of the automobile industry, semitrailers with greater carrying capacity are widely used. The steel plate spring is an elastic element widely used in a semi-trailer suspension, and a group of concentric tangent circular arcs is formed by a plurality of alloy spring pieces with equal width but unequal length to form an elastic beam with approximate equal strength. After the axle and the frame joint installed in the semitrailer suspension, when the axle and the frame generate relative displacement, each spring leaf in the steel plate spring can be stressed and deformed, and has the tendency of arching. And when the axle and the frame are reset, the deformation of each spring piece is reduced until the spring pieces are reset.
In the use process of the steel plate spring in the prior art, the anti-falling pin is often abutted against the end part of the second spring piece, so that the anti-falling pin is subjected to large impact force, and the anti-falling pin fails due to deformation after a long time. And when the displacement amplitude between the axle and the frame is too large, a larger gap is formed between the second spring piece and the first spring piece, and the anti-slip pin can slip into the gap, so that the normal use of the steel plate spring is influenced.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a semitrailer variable cross section leaf spring to the impact force that the anticreep round pin received among the solution prior art is great, leads to the technical problem of inefficacy owing to warp.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a variable cross-section steel plate spring of a semitrailer comprises a release preventing pin, a first spring piece and a second spring piece, wherein the first spring piece and the second spring piece are arranged in a laminating mode and fixedly connected at the center positions of the first spring piece and the second spring piece, the length of the second spring piece is smaller than that of the first spring piece, a mounting cavity is formed in one side, facing the second spring piece, of the end portion of the first spring piece, the release preventing pin is arranged in the mounting cavity and abutted against the surface of the first spring piece, the second spring piece comprises a second spring piece body and a transition piece body formed by extending the second spring piece body towards the direction close to the mounting cavity, the first spring piece is provided with a first surface facing the second spring piece body, the transition piece body is attached to the first surface, the thickness of the transition piece body is gradually reduced along the direction facing the release preventing pin, and the thickness size of one end, close to the second spring, the thickness dimension of one end of the transition sheet body far away from the second spring piece body is smaller than the radius dimension of the anti-falling pin.
In some of these embodiments, the transition piece decreases linearly in thickness in a direction toward the anti-slip pin.
In some of these embodiments, the cross-sectional shape of the anti-slip pin is circular, the transition piece having a second surface facing the anti-slip pin, the second surface lying in a plane tangential to the outer surface of the anti-slip pin.
In some embodiments, the second spring plate body is integrally formed with the transition piece.
In some embodiments, the two ends of the first spring plate are respectively provided with a mounting cavity at one side facing the second spring plate, and the two ends of the second spring plate body respectively extend towards the direction close to the mounting cavity to form a transition sheet body.
In some embodiments, the two transition pieces are symmetrically disposed about a center of the second spring plate.
In some embodiments, the first spring plate includes a second spring plate body and a bent piece bent from the second spring plate body to a side of the second spring plate, and the bent piece and the second spring plate define the mounting cavity together.
In some of these embodiments, the thickness of the bent blade in the direction away from the anti-slip pin is gradually reduced.
Compared with the prior art, the utility model provides an among the variable cross section leaf spring of semitrailer, through set up the transition lamellar body that extends the formation to the installation cavity direction on the second spring leaf body of second spring leaf, and the transition lamellar body reduces along the direction thickness towards anticreep round pin gradually, be favorable to when the displacement range between axle and frame is relatively less, under the prerequisite that does not influence leaf spring normal use, reduce the conflict area of anticreep round pin and second spring leaf, reduced the impact force to the anticreep round pin. And the thickness dimension of the end of the transition sheet body far away from the second spring piece body is smaller than the radius dimension of the anti-slip pin, and the anti-slip pin is guided to move towards the surface of the first spring piece or the second spring piece beyond the end part of the transition sheet body, so that the anti-slip pin is not directly abutted against the end part of the second spring piece, and the service life of the anti-slip pin is prolonged.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of a leaf spring in the prior art;
FIG. 2 is an enlarged schematic view of FIG. 1;
FIG. 3 is a schematic view of the overall structure of a variable cross-section leaf spring of a semitrailer in an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of FIG. 3;
fig. 5 is a schematic view of an overall structure of a second spring plate according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 2, a leaf spring 10 'in the prior art includes a separation preventing pin 100', a first spring plate 200 ', and a second spring plate 300', wherein the first spring plate 200 'and the second spring plate 300' are stacked and attached to each other, and are fixedly connected at their respective central positions. The separation preventing pin 100 ' is provided on the side of the end of the first spring plate 200 ' toward the second spring plate 300 '. In use, after the leaf spring 10 ' is installed at the joint between the axle and the frame in the vehicle suspension, the anti-slip pin 100 ' is subjected to a large impact force due to the fact that the end of the anti-slip pin 100 ' is often abutted against the end of the second spring piece 300 ', and the anti-slip pin 100 ' fails due to deformation over time. Moreover, when the displacement between the axle and the frame is too large, a large gap is formed between the second spring plate 300 'and the first spring plate 200', and the anti-slip pin 100 'may slip into the gap, thereby affecting the normal use of the leaf spring 10'.
Referring to fig. 3 to 5, an embodiment of the present invention provides a semi-trailer variable cross-section leaf spring 10, where the leaf spring 10 includes an anti-slip pin 100, a first leaf spring 200 and a second leaf spring 300.
The first spring plate 200 and the second spring plate 300 are arranged in a stacked and attached manner, and are fixedly connected at their respective center positions. Besides the first spring plate 200 and the second spring plate 300, the leaf spring 10 may further include a plurality of spring plates, which are sequentially stacked and attached, and the number of the spring plates is set according to the use requirement to form an elastic beam with approximately equal strength. And the length of the second spring plate 300 is smaller than that of the first spring plate 200, so as to form a mounting cavity 400 at one side of the end part of the first spring plate 200 facing the second spring plate 300, the end part of the first spring plate 200 refers to the edge range area opposite to the center, because the first spring plate 200 and the second spring plate 300 are fixedly connected at the respective center positions, and the length of the second spring plate 300 is smaller than that of the first spring plate 200, the edge position of the end part of the first spring plate 200 is certain to have an area which is not covered by the second spring plate 300, namely the mounting cavity 400 is formed. The anti-slip pin 100 is provided in the mounting chamber 400 and abuts against a surface of the first spring plate 200. The leaf spring 10 is installed at the joint of the vehicle axle and the vehicle frame through the anti-drop pin 100, and when the vehicle axle and the vehicle frame generate relative displacement, each leaf spring in the leaf spring 10 is stressed and deformed, and has a tendency of arching. And when the axle and the frame are reset, the deformation of each spring piece is reduced until the spring pieces are reset.
The second spring plate 300 includes a second spring plate body 310 and a transition piece 320 formed by extending the second spring plate body 310 toward the mounting cavity 400, the first spring plate 200 has a first surface 230 facing the second spring plate body 310, the transition piece 320 is attached to the first surface 230, and the thickness of the transition piece 320 gradually decreases in a direction toward the anti-slip pin 100. The transition sheet body 320 provides a transition buffer for the contact between the second spring plate 300 and the anti-slip pin 100, which is beneficial to reducing the collision area between the anti-slip pin 100 and the second spring plate 300 and reducing the impact force on the anti-slip pin 100 when the displacement amplitude between the axle and the frame is relatively small. The thickness dimension of one end of the transition sheet body 320 close to the second spring piece body 310 is larger than the radius dimension of the anti-slip pin 100, the thickness dimension of one end of the transition sheet body 320 far away from the second spring piece body 310 is smaller than the radius dimension of the anti-slip pin 100, the transition sheet body 320 is utilized to guide the anti-slip pin 100 to move towards the surface of the transition sheet body over the end part of the transition sheet body 320, so that the anti-slip pin 100 is not directly abutted against the end part of the second spring piece 300, and can move along the transition sheet body 320 to be in contact with the surface of the second spring piece 300, and the service life of the anti-slip pin is.
The embodiment of the utility model provides an among the variable cross section leaf spring 10 of semitrailer, through set up the transition lamellar body 320 that extends the formation to installation cavity 400 direction on the second spring leaf body 310 at second spring leaf 300, and transition lamellar body 320 reduces along the direction thickness towards anticreep round pin 100 gradually, be favorable to when the displacement range between axle and frame is relatively less, under the prerequisite that does not influence leaf spring 10 normal use, reduce the conflict area of anticreep round pin 100 with second spring leaf 300, the impact force to anticreep round pin 100 has been reduced. The thickness dimension of one end of the transition piece body 320 far away from the second spring piece body 310 is smaller than the radius dimension of the anti-slip pin 100, and the anti-slip pin 100 is guided to move towards the surface of the first spring piece 200 or the second spring piece 300 beyond the end of the transition piece body 320, so that the anti-slip pin 100 is not directly abutted against the end of the second spring piece 300, and the service life of the anti-slip pin is prolonged.
Further, the cross-sectional shape of the anti-slip pin 100 is circular, and the transition piece 320 has a second surface 321 facing the anti-slip pin 100, the plane of the second surface 321 being tangential to the outer surface of the anti-slip pin 100. That is, the plane of the second surface 321 of the transition sheet body 320 facing the anti-slip pin is tangent to the outer surface of the anti-slip pin 100, so that when the displacement between the axle and the frame is too large and a large gap occurs between the second spring plate 300 and the first spring plate 200, the anti-slip pin 100 can directly abut against the second surface 321, and is driven by the transition sheet body 320 to move together with the transition sheet body 320, and cannot directly enter the gap between the second spring plate 300 and the first spring plate 200, so that the leaf spring 10 can be kept in normal use.
In some embodiments, the second spring plate body 310 and the transition piece 320 are integrally formed, that is, the second spring plate 300 is an integral structure, which not only can enhance the overall structural strength of the second spring plate 300, but also facilitates the processing and forming of the second spring plate 300, and reduces the production and processing costs of the leaf spring 10 in this embodiment.
In some embodiments, the first spring plate 200 has two ends respectively formed with a mounting cavity 400 at a side facing the second spring plate 300, and the second spring plate body 310 has two ends respectively extended to a direction close to the mounting cavity 400 to form a transition piece 320. Both ends of the leaf spring 10 need to be installed at the connection position of the axle and the frame through the anti-drop pin 100, therefore, both ends of the leaf spring 10 are of symmetrical structures, both ends of the first spring leaf 200 are respectively formed with an installation cavity 400 at one side facing the second spring leaf 300, and both ends of the second spring leaf body 310 are respectively formed with a transition sheet body 320 extending towards the direction close to the installation cavity 400, further, both installation cavities 400 and the transition sheet bodies 320 at both ends are symmetrically arranged about the center of the second spring leaf 300.
In order to better limit the anti-slip pin 100 in the mounting cavity 400, in some embodiments, the first spring plate 200 includes a second spring plate body 210 and a bent piece 220 formed by bending the second spring plate body 210 to one side of the second spring plate 300, and the bent piece 220 and the second spring plate 300 together define the mounting cavity 400. Like this, the bending sheet body 220 of buckling can play certain direction limiting effect to the direction of motion of anticreep round pin 100, and anticreep round pin 100 is unlikely to wholly break away from with leaf spring 10 after the direction motion of injecing along bending sheet body 220, but gets back to in leaf spring 10's installation cavity 400 under the exogenic action, is favorable to keeping leaf spring 10's overall structure stability.
Similar to the structure of transition tab 320, in some of these embodiments, fold tab 220 tapers in thickness in a direction away from anti-slip pin 100. The reduced amplitude can be fast first and slow later, slow first and fast later, or the amplitude can be kept consistent from the former to the latter.
To sum up, the embodiment of the utility model provides a semitrailer variable cross section leaf spring 10 is favorable to when the displacement range between axle and frame is relatively less, under the prerequisite that does not influence leaf spring 10 normal use, reduces the conflict area of anticreep round pin 100 with second spring leaf 300, has reduced the impact force to anticreep round pin 100. The thickness dimension of one end of the transition piece body 320 far away from the second spring piece body 310 is smaller than the radius dimension of the anti-slip pin 100, and the anti-slip pin 100 is guided to move towards the surface of the first spring piece 200 or the second spring piece 300 beyond the end of the transition piece body 320, so that the anti-slip pin 100 is not directly abutted against the end of the second spring piece 300, and the service life of the anti-slip pin is prolonged. When the displacement between the axle and the frame is too large and a large gap is formed between the second spring plate 300 and the first spring plate 200, the anti-slip pin 100 directly abuts against the second surface 321, is driven by the transition sheet body 320 and moves along with the transition sheet body 320, and cannot directly enter the gap between the second spring plate 300 and the first spring plate 200, so that the steel plate spring 10 can be normally used.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, and a specific orientation configuration and operation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the above terms according to specific situations.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A variable cross-section steel plate spring of a semitrailer comprises a separation preventing pin, a first spring piece and a second spring piece, wherein the first spring piece and the second spring piece are arranged in a laminated and attached mode and are fixedly connected at the center positions of the first spring piece and the second spring piece, the length of the second spring piece is smaller than that of the first spring piece, a mounting cavity is formed in the end portion of the first spring piece and faces one side of the second spring piece, the separation preventing pin is arranged in the mounting cavity and is abutted to the surface of the first spring piece, the variable cross-section steel plate spring is characterized in that the second spring piece comprises a second spring piece body and a transition piece body, the transition piece body extends from the second spring piece body to the direction close to the mounting cavity, the first spring piece is provided with a first surface facing the second spring piece body, the transition piece body is attached to the first surface, and the thickness of the transition piece body gradually decreases along the direction, and the thickness dimension of one end of the transition sheet body close to the second spring piece body is larger than the radius dimension of the anti-slip pin, and the thickness dimension of one end of the transition sheet body far away from the second spring piece body is smaller than the radius dimension of the anti-slip pin.
2. A semi-trailer variable section leaf spring as claimed in claim 1, wherein said transition piece decreases linearly in thickness in a direction towards said anti-slip pin.
3. A semi-trailer variable section leaf spring as claimed in claim 1, wherein the cross-sectional shape of the anti-slip pin is circular, the transition piece having a second surface facing the anti-slip pin, the second surface lying in a plane tangential to the outer surface of the anti-slip pin.
4. The semi-trailer variable cross-section leaf spring as claimed in claim 1, wherein said second leaf spring body is integrally formed with said transition piece.
5. The semi-trailer variable-section steel plate spring as claimed in claim 1, wherein the mounting cavity is formed at one side of each of two ends of the first spring plate facing the second spring plate, and the transition piece body is formed at each of two ends of the second spring plate body extending towards the direction close to the mounting cavity.
6. A semitrailer variable cross-section leaf spring as claimed in claim 5, characterized in that two said transition pieces are arranged symmetrically about the center of said second spring leaf.
7. The semi-trailer variable-section leaf spring as claimed in claim 1, wherein the first spring plate comprises a second spring plate body and a bent piece body formed by bending the second spring plate body to one side of the second spring plate, and the bent piece body and the second spring plate jointly define the mounting cavity.
8. A semi-trailer variable section leaf spring as claimed in claim 7, wherein the thickness of the bent blade in a direction away from the anti-slip pin is gradually reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021742189.9U CN213393277U (en) | 2020-08-19 | 2020-08-19 | Variable cross-section steel plate spring of semitrailer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021742189.9U CN213393277U (en) | 2020-08-19 | 2020-08-19 | Variable cross-section steel plate spring of semitrailer |
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| CN213393277U true CN213393277U (en) | 2021-06-08 |
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| CN202021742189.9U Active CN213393277U (en) | 2020-08-19 | 2020-08-19 | Variable cross-section steel plate spring of semitrailer |
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- 2020-08-19 CN CN202021742189.9U patent/CN213393277U/en active Active
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