Trailer supporting leg capable of resisting wrinkles and tearing

Abstract

The utility model discloses a drape and tear resistant trailer landing leg which comprises a supporting sleeve, a supporting rod and a lifting mechanism, the supporting rod is inserted into the supporting sleeve from the lower end in a sliding mode, and the lifting mechanism is arranged on the upper portion of the supporting sleeve and used for driving the supporting rod to stretch out and draw back up and down relative to the supporting sleeve. A mounting plate is fixedly mounted on the back side of the supporting sleeve, and the supporting sleeve is mounted on a trailer girder through the mounting plate. The mounting plate comprises an upper connecting plate and a lower extending plate which are integrally formed, the overall length of the mounting plate accounts for at least half of the supporting sleeve, a plurality of mounting holes are symmetrically formed in a left side lug and a right side lug, extending out of the supporting sleeve, of the upper connecting plate, and the length of the lower extending plate is at least equal to that of the upper connecting plate. The semitrailer supporting leg is simple in structure, stress borne by the supporting leg is evenly diffused and distributed downwards by increasing the length area of the installation plate, stress concentration of local point positions is reduced, the strength of the supporting sleeve is improved, the whole semitrailer supporting leg structure is firmer and more durable, and follow-up maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of semitrailer legs, in particular to a trailer leg which is resistant to wrinkles and tearing. Background Art

[0002] Semi-trailers are a widely used means of transport in the modern transportation industry. When driving, their front ends are connected to the tractor to be supported by the tractor. When not driving, the front ends of the semi-trailers can be detached from the tractor. The semi-trailer support device is commonly known as an outrigger, which is located at the front end of the semi-trailer frame and is used after the semi-trailer is detached from the tractor. When the existing outrigger structure is fixed to the frame beam, only its upper end is fixed to it by bolts. When the semi-trailer is transported from the production plant to the customer's site, the vehicle is often transported in a carried manner. During the transportation of the vehicle, the outrigger is lowered for support. If an emergency brake is encountered, due to the friction between the lower end of the outrigger and the contact surface, the semi-trailer will shake forward, which may cause the trailer outrigger to wrinkle and tear below the bolt connection, affecting its service life and increasing maintenance costs. Utility Model Content

[0003] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and overcome the problem of wrinkle and tear of trailer legs, thereby providing a wrinkle and tear resistant trailer leg.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a wrinkle and tear resistant trailer leg, comprising a support sleeve, a support rod and a lifting mechanism, wherein the lower end of the support sleeve is open and the inside is hollow, the support rod is installed from the lower end of the support sleeve into the support sleeve, and the lifting mechanism is arranged at the upper part of the support sleeve, which is used to drive the support rod to extend and retract up and down relative to the support sleeve; a mounting plate is fixedly installed on the back side of the support sleeve, and the support sleeve is installed on the trailer beam through the mounting plate.

[0005] The mounting plate includes an integrally formed upper connecting plate and a lower extension plate, and its overall length accounts for at least half of the support sleeve. A plurality of mounting holes are symmetrically provided on the left and right ears of the upper connecting plate extending out of the support sleeve, and the length of the lower extension plate is at least equal to that of the upper connecting plate.

[0006] Furthermore, the orthographic projection of the lower extension plate is in the shape of an inverted trapezoid, and two vertical sides thereof are in the shape of inner arcs.

[0007] Furthermore, a relatively vertical base is fixedly mounted on the bottom of the support rod, and the left and right edges of the base are both tilted upward.

[0008] Furthermore, a plurality of reinforcing ribs are fixedly installed between the mounting plate and the outer side wall of the supporting sleeve.

[0009] Furthermore, at least one fastening ring is provided on the outer side of the lower end of the support sleeve, and multiple fastening rings are arranged at equal intervals along the length direction of the support sleeve.

[0010] Furthermore, at least one guiding rib plate along the length direction of the support sleeve is provided on the left and right side walls inside the support sleeve, and is perpendicular to the inner side wall on the corresponding side; correspondingly, guiding grooves adapted to the guiding rib plates are provided on the left and right outer side walls of the support rod.

[0011] Compared with the prior art, the utility model has the following beneficial effects: The overall structure of the utility model is simple. By increasing the length area of the mounting plate, the stress borne by the legs is evenly diffused downward, reducing the stress concentration at local points, increasing the strength of the support sleeve, making the entire semi-trailer leg structure more firm and durable, and reducing the subsequent maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the overall structure schematic diagram of the utility model;

[0013] Figure 2 is the front view of the structure of the utility model;

[0014] Figure 3 is the front view of the mounting plate in the utility model;

[0015] Figure 4 is the further optimized structure schematic diagram of the support sleeve in the utility model;

[0016] Figure 5 is another assembly relationship diagram between the support sleeve and the support rod in the utility model;

[0017] Figure 6 is Figure 5 the enlarged view of part A in

[0018] In the figure: 1, support sleeve; 2, support rod; 3, lifting mechanism; 4, mounting plate; 5, base; 6, fastening ring; 7, reinforcing rib; 11, guiding rib plate; 21, guiding groove; 41, upper connecting plate; 42, lower extension plate; 43, mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] It should be noted that in the description of the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "dorsal side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only relationship terms determined for the convenience of describing the structural relationship of each component in the present utility model, rather than specifically referring to any component in the present utility model that must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation to the present utility model.

[0020] In addition, in the description of the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "set", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings:

[0022] like Figures 1 to 4 As shown, a wrinkle and tear resistant trailer leg is fixedly installed on the beam of a semi-trailer frame by bolts, and includes a support sleeve 1, a support rod 2 and a lifting mechanism 3, wherein the lower end of the support sleeve 1 is open and the interior is hollow, the support rod 2 is inserted into the support sleeve 1 from the lower end opening of the support sleeve 1 upward, and can slide and retract along its length direction, and a base 5 larger than its cross section is fixedly installed at the bottom of the support rod 2, the base 5 is relatively perpendicular to the support rod 2, and the left and right edges thereof are both tilted upward; the lifting mechanism 3 is arranged at the upper part of the support sleeve 1, and is mainly used to drive the support rod 2 to perform up and down telescopic movement relative to the support sleeve 1, which can be achieved by adopting the relevant driving structure in the prior art, and will not be described in detail here.

[0023] A mounting plate 4 is fixedly installed on the back side of the support sleeve 1, and the mounting plate 4 includes an upper connecting plate 41 and a lower extension plate 42 which are integrally formed, wherein the orthographic projection of the upper connecting plate 41 is rectangular, and the orthographic projection of the lower extension plate 42 is inverted trapezoidal, and its two vertical sides are arranged in an inner arc shape, which increases the strength while reducing its own weight; the width of the upper connecting plate 41 is greater than the width of the support sleeve 1, and the left and right ears extending from the support sleeve 1 are symmetrically provided with a plurality of vertically arranged mounting holes 43, and the entire trailer leg is fixedly connected to the frame beam of the semi-trailer by bolts passing through the corresponding mounting holes 43. The overall length of the mounting plate 4 accounts for at least half of the length of the support sleeve 1 to enhance the strength of the support sleeve 1; the length L2 of the lower extension plate 42 is at least equal to the length L1 of the upper connecting plate 41, which can better distribute the lateral stress downward evenly, reduce the stress concentration at local points, and prevent wrinkles and tears at the bolt connection.

[0024] As a further optimized technical solution, a plurality of equidistantly arranged reinforcing ribs 7 are provided between the protruding side ears of the mounting plate 4 and the outer side wall of the support sleeve 1, so as to strengthen the connection strength between the mounting plate 4 and the support sleeve 1 and increase the strength of the support sleeve 1. At least one fastening ring 6 is fixedly mounted on the outer side of the lower end of the support sleeve 1, and a plurality of fastening rings 6 are welded and fixed at equal distances along the length direction of the support sleeve 1 to prevent the lower end opening of the support sleeve 1 from cracking.

[0025] As a further optimized technical solution of the present utility model, in combination with Figure 5 and Figure 6 shown in the figure, at least one guiding rib plate 11 along the length direction of the support sleeve 1 is provided on the left and right side walls inside the support sleeve 1. The guiding rib plates 11 are parallel to each other and are respectively perpendicular to the inner side wall of the corresponding side of the support sleeve and are integrally formed therewith. Correspondingly, guiding grooves 21 adapted to the guiding rib plates 11 are respectively provided on the left and right outer side walls of the support rod 2. The guiding rib plates 11 are slidably installed in the corresponding guiding grooves 21. In addition to improving the stable guiding effect of the support rod 2, the strength of the support sleeve 1 is enhanced by the guiding rib plates 11 to prevent fracture and extend its service life.

[0026] The above-mentioned support sleeve 1, support rod 2, mounting plate 4, base 5, etc. are all made of aluminum alloy materials.

[0027] The left-right direction of the above-mentioned support sleeve 1 is the traveling direction of the vehicle body of the semi-trailer.

[0028] Certainly, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the substantial scope of the present utility model shall also fall within the protection scope of the present utility model.

Claims

1. A wrinkle and tear resistant trailer leg, characterized in that: It includes a support sleeve, a support rod and a lifting mechanism, wherein the lower end of the support sleeve is open and the interior is hollow, the support rod is installed in the support sleeve from the lower end of the support sleeve, and the lifting mechanism is arranged at the upper part of the support sleeve, and is used to drive the support rod to extend and retract relative to the support sleeve; a mounting plate is fixedly installed on the back side of the support sleeve, and the support sleeve is installed on the trailer beam through the mounting plate; The mounting plate includes an integrally formed upper connecting plate and a lower extension plate, and its overall length accounts for at least half of the support sleeve. A plurality of mounting holes are symmetrically provided on the left and right ears of the upper connecting plate extending out of the support sleeve, and the length of the lower extension plate is at least equal to that of the upper connecting plate.

2. The wrinkle and tear resistant trailer leg according to claim 1, characterized in that: The orthographic projection of the lower extension plate is in an inverted trapezoid, and its two vertical side edges are arranged in an inner arc shape.

3. The wrinkle and tear resistant trailer leg according to claim 1, characterized in that: A relatively vertical base is fixedly installed at the bottom of the support rod, and the left and right edges of the base are both tilted upward.

4. The wrinkle and tear resistant trailer leg according to claim 1, characterized in that: A plurality of reinforcing ribs are fixedly installed between the mounting plate and the outer side wall of the supporting sleeve.

5. The wrinkle and tear resistant trailer leg according to claim 1, characterized in that: At least one fastening ring is arranged on the outer side of the lower end of the support sleeve, and a plurality of fastening rings are arranged equidistantly along the length direction of the support sleeve.

6. The wrinkle and tear resistant trailer leg according to claim 1, characterized in that: The left and right side walls inside the support sleeve are each provided with at least one guide rib along the length direction of the support sleeve, which is perpendicular to the inner side walls on the corresponding side; correspondingly, the left and right outer side walls of the support rod are provided with guide grooves adapted to the guide ribs.

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