Semitrailer supporting leg

Abstract

The utility model discloses a semitrailer supporting leg, which belongs to the technical field of semitrailer supporting legs and comprises a main hydraulic cylinder, a support is arranged on a cylinder body of the main hydraulic cylinder, the support is rotatably connected with a pillar hydraulic cylinder, the pillar hydraulic cylinder is rotatably connected with an extension leg, and the extension leg is rotatably connected with a telescopic end of the main hydraulic cylinder. The supporting leg is specially designed for supporting a semitrailer, the advantages of a long cylinder hydraulic device and a short cylinder hydraulic device are combined in the scheme, the overall length of the supporting leg is extended under the condition that the length of the cylinder is not increased, and the purposes that the supporting leg can make good contact with the ground during extension, the distance between the bottom of the supporting leg and the ground is increased after retraction, and accidents caused by contact with the ground are avoided are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-trailer outriggers, in particular to a semi-trailer outrigger. Background Art

[0002] A semitrailer is a heavy-duty transport vehicle with its axle positioned behind the vehicle's center of gravity (when evenly loaded) and equipped with a hitch that transmits horizontal and vertical forces to the towing vehicle. Semitrailers are typically three-axled and come in a variety of types, including 11-meter sidecars, 13-meter sidecars, and low-bed trailers. They are connected to the semitrailer's head with a tow pin.

[0003] When the tractor is separated from the semi-trailer, the front end of the semi-trailer needs to be supported by a supporting device. The supporting device is commonly known as the semi-trailer outrigger, which is divided into two parts, the left and right, and is an indispensable part of the semi-trailer. The extension and retraction degree of the current semi-trailer outrigger is limited by the length of the hydraulic cylinder. The longer the cylinder, the longer the extension and retraction stroke.

[0004] Therefore, the outriggers with long cylinder bodies have a long telescopic stroke, and can achieve the purpose of contacting the ground well when extended. However, after retracting, the distance between the bottom of the outrigger and the ground is small, and it may contact the ground when the tractor drives towards the slope, causing an accident and damaging the road surface and the bottom of the outrigger. The outriggers with short cylinder bodies have a short telescopic stroke. After retracting, the distance between the bottom of the outrigger and the ground is large, which can effectively prevent the tractor from contacting the ground when driving towards the slope. However, due to the short stroke when extended, it may affect the contact between the bottom of the outrigger and the ground. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a semi-trailer outrigger; the semi-trailer outrigger is specially designed for supporting a semi-trailer. This solution combines the advantages of a long and short cylinder hydraulic device to extend the overall length of the outrigger without extending the length of the cylinder, so that it can make good contact with the ground when extended, and increase the distance between the bottom of the outrigger and the ground after retraction to avoid accidents caused by contact with the ground.

[0006] In order to solve the above technical problems, the utility model provides a semi-trailer support leg, including a main hydraulic cylinder, a bracket is provided on the cylinder body of the main hydraulic cylinder, the bracket is rotatably connected to the support hydraulic cylinder, the support hydraulic cylinder is rotatably connected to the extension leg, and the extension leg is rotatably connected to the telescopic end of the main hydraulic cylinder.

[0007] In a further improvement of the present invention, the cylinder body of the master hydraulic cylinder is welded or threadedly connected to the bracket.

[0008] Through the above design, this solution can more easily connect the cylinder body of the master hydraulic cylinder and the bracket.

[0009] In a further improvement of the present invention, the end of the bracket is provided with an articulated ear seat I, the articulated ear seat I is connected to an articulated shaft I, and the articulated shaft I is rotatably connected to the cylinder end of the support hydraulic cylinder.

[0010] Through the above design, this solution can more easily connect the bracket to the cylinder body of the support hydraulic cylinder.

[0011] In a further improvement of the present invention, a hinged ear seat II is provided in the middle of the extension leg, the hinged ear seat II is connected to a hinged shaft II, and the hinged shaft II is rotatably connected to the telescopic end of the support hydraulic cylinder.

[0012] Through the above design, this solution can more easily connect the extension leg to the support hydraulic cylinder.

[0013] In a further improvement of the present invention, a hinged ear seat III is provided on the top of the extension leg, the hinged ear seat III is connected to a hinged shaft III, and the hinged shaft III is rotatably connected to the telescopic end of the main hydraulic cylinder.

[0014] Through the above design, this solution can more easily connect the extension leg to the main hydraulic cylinder for rotation.

[0015] In a further improvement of the present invention, the bottom of the extension leg is rotatably connected to a base.

[0016] Through the above design, this solution can be more easily adapted to uneven ground.

[0017] In a further improvement of the present invention, a hinged ear seat IV is provided on the base, the hinged ear seat IV is connected to a hinged shaft IV, and the hinged shaft IV is rotatably connected to the bottom of the extension leg.

[0018] Through the above design, this solution can more easily facilitate the rotational connection between the extension leg and the base.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The utility model is specially designed for supporting semi-trailers. This solution combines the advantages of long and short cylinder hydraulic devices. Without extending the length of the cylinder, the overall length of the outrigger is extended to achieve good contact with the ground when extended. After retraction, the distance between the bottom of the outrigger and the ground is increased to avoid accidents caused by contact with the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the background technology or the technical solution of the present invention, the following is a brief introduction to the drawings used in conjunction with the prior art or specific implementation methods; obviously, the structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention, so they have no technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0022] Figure 1 This is a reference schematic diagram of the retracted state of a specific embodiment of the present invention.

[0023] Figure 2 This is a reference schematic diagram of the extended state of a specific embodiment of the present utility model.

[0024] As shown in the figure: 1. Main hydraulic cylinder; 2. Bracket; 21. Articulated ear seat I; 3. Support hydraulic cylinder; 4. Extension leg; 41. Articulated ear seat II; 42. Articulated ear seat III; 5. Base; 51. Articulated ear seat IV. DETAILED DESCRIPTION

[0025] In order to enable people skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work should fall within the scope of protection of the present invention.

[0026] At the same time, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like cited in this specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0027] At the same time, in the description of this specification, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] The extension and retraction degree of the current semi-trailer outriggers is limited by the length of the hydraulic cylinder. The longer the cylinder, the longer the extension stroke. Therefore, the outriggers with long cylinders have a long extension stroke and can achieve good contact with the ground when extended. However, after retracting, the distance between the bottom of the outrigger and the ground is small. When the tractor drives towards a slope, it may contact the ground and cause an accident, damaging the road surface and the bottom of the outrigger. The outriggers with short cylinders have a short extension stroke. After retracting, the distance between the bottom of the outrigger and the ground is large, which can effectively prevent the tractor from contacting the ground when driving towards a slope. However, due to the short stroke when extended, it may affect the contact between the bottom of the outrigger and the ground.

[0029] Therefore, the design concept of this application is to add an extension leg on the basis of the short cylinder leg. In this way, the advantages of the long and short cylinder hydraulic devices can be combined to extend the overall length of the leg without extending the length of the cylinder, so that it can be in good contact with the ground when extended. After retracting, the distance between the bottom of the leg and the ground is increased to avoid accidents caused by contact with the ground.

[0030] like Figure 1-2 As shown, the present application provides a semi-trailer outrigger, comprising a main hydraulic cylinder 1, a bracket 2 being provided on the cylinder body of the main hydraulic cylinder 1, the bracket 2 being rotatably connected to a support hydraulic cylinder 3, the support hydraulic cylinder 3 being rotatably connected to an extension leg 4, and the extension leg 4 being rotatably connected to the telescopic end of the main hydraulic cylinder 1.

[0031] When extending, the telescopic end of the main hydraulic cylinder 1 extends downward, the telescopic end of the support hydraulic cylinder 3 extends obliquely downward, the extension leg 4 rotates downward with the axis of the hinge shaft III as the center, the base 5 contacts the ground, and the extension action is completed. Figure 2 When retracting, the telescopic end of the main hydraulic cylinder 1 retracts upward, the telescopic end of the support hydraulic cylinder 3 retracts obliquely upward, and the extension leg 4 rotates upward with the axis of the hinge shaft III as the center, as shown. Figure 1 shown.

[0032] The cylinder body of the master hydraulic cylinder 1 is welded or threadedly connected to the bracket 2 ; during manufacturing, the bracket 2 is welded or threadedly connected to the outer wall of the cylinder body of the master hydraulic cylinder 1 .

[0033] Among them, the end of the bracket 2 is provided with an articulated ear seat Ⅰ21, the articulated ear seat Ⅰ21 is connected to the articulated shaft Ⅰ, and the articulated shaft Ⅰ is rotatably connected to the cylinder end of the support hydraulic cylinder 3; the cylinder end of the support hydraulic cylinder 3 can rotate around the axis of the articulated shaft Ⅰ.

[0034] Among them, an articulated ear seat II 41 is provided in the middle of the extension leg 4, and the articulated ear seat II 41 is connected to an articulated shaft II, which is rotatably connected to the telescopic end of the support hydraulic cylinder 3; the telescopic end of the support hydraulic cylinder 3 can rotate around the axis of the articulated shaft II.

[0035] Among them, the top of the extension leg 4 is provided with an articulated ear seat III42, the articulated ear seat III42 is connected to the articulated shaft III, and the articulated shaft III is rotatably connected to the telescopic end of the main hydraulic cylinder 1; the top of the extension leg 4 can rotate around the axis of the articulated shaft III.

[0036] The bottom of the extension leg 4 is rotatably connected to a base 5 ; the design of the base 5 is more conducive to contact with uneven ground.

[0037] The base 5 is provided with an articulated ear seat IV51, the articulated ear seat IV51 is connected to an articulated shaft IV, and the articulated shaft IV is rotatably connected to the bottom of the extension leg 4; the base 5 can rotate around the axis of the articulated shaft IV.

[0038] Although the present invention has been described in detail with reference to the accompanying drawings and in combination with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, ordinary technicians in this field can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all be within the scope of the present invention. Any technician familiar with this technical field can easily think of changes or substitutions within the technical scope disclosed in the present invention, and they should all be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A semi-trailer outrigger, comprising a main hydraulic cylinder, characterized in that: A bracket is provided on the cylinder body of the main hydraulic cylinder, the bracket is rotatably connected to the support hydraulic cylinder, the support hydraulic cylinder is rotatably connected to the extension leg, and the extension leg is rotatably connected to the telescopic end of the main hydraulic cylinder.

2. The semi-trailer support leg according to claim 1, characterized in that: The cylinder body of the master hydraulic cylinder is welded or threadedly connected to the bracket.

3. The semi-trailer support leg according to claim 1, characterized in that: The end of the bracket is provided with an articulated ear seat I, the articulated ear seat I is connected to an articulated shaft I, and the articulated shaft I is rotatably connected to the cylinder body end of the support hydraulic cylinder.

4. The semi-trailer support leg according to claim 1, characterized in that: A hinged ear seat II is provided in the middle of the extension leg, the hinged ear seat II is connected to a hinged shaft II, and the hinged shaft II is rotatably connected to the telescopic end of the support hydraulic cylinder.

5. The semi-trailer support leg according to claim 1, characterized in that: The top of the extension leg is provided with an articulated ear seat III, the articulated ear seat III is connected to an articulated shaft III, and the articulated shaft III is rotatably connected to the telescopic end of the main hydraulic cylinder.

6. The semi-trailer support leg according to claim 1, characterized in that: The bottom of the extension leg is rotatably connected to a base.

7. The semi-trailer support leg according to claim 6, characterized in that: The base is provided with an articulated ear seat IV, the articulated ear seat IV is connected to an articulated shaft IV, and the articulated shaft IV is rotatably connected to the bottom of the extension leg.

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