Hinged retractable step

Abstract

The present invention discloses a hinged telescopic boarding step, comprising a step bracket movably connected to the front of a fuel tank bracket, and a step integrated in the step bracket; the boarding step has an unfolded state and a stowed state; when the boarding step is in the stowed state, the step bracket moves to the lower part of the fuel tank and drives the step to be located at the front side of the lower part of the fuel tank; when the boarding step is in the unfolded state, the step bracket part moves to the front side of the fuel tank and drives the step to be located at the front side of the fuel tank. The boarding step of the present invention is movably connected to the front of the fuel tank bracket, and is movably connected to the step support bracket carrying the step through a hinge, and under the action of the hinge, the step support bracket is rotatably connected relative to the step fixing bracket, and can slide inward to store the step support bracket, so that the entire structure forms a rotating telescopic structure, which is convenient for the stowing and unfolding of the step.

Description

Technical Field

[0001] The invention relates to the technical field of tractors, and in particular to a hinged telescopic step structure for getting on a tractor that is suitable for a fuel tank. Background Art

[0002] When a tractor is equipped with dual fuel tanks, the two fuel tanks are arranged on both sides of the tractor, and there is no space for arranging steps. When the driver or maintenance personnel inspect or replace the trailer, they need to get on the vehicle to check, and it is difficult for the driver or maintenance personnel to get on and off the vehicle, which may easily cause bumps or falls to the driver or maintenance personnel, and poses certain safety hazards.

[0003] In the prior art, see Figure 1 As shown, Figure 1 The structure of the fuel tank and the step in the prior art is shown. Currently, the step tank structure is mostly used, that is, a rectangular area of ​​about 350*400 mm on the underside of the fuel tank (1) is recessed into the fuel tank (1) by 100 mm to form a layout space for the step (2), and a two-level boarding step (2) is installed in the layout space.

[0004] However, the production process of the step oil tank structure in the prior art is complex and costly, and the step welds are prone to cracking and oil leakage, especially when the step is stepped on frequently, and the failure rate is very high.

[0005] Therefore, based on the above technical problems, technicians in this field urgently need to develop a hinged telescopic boarding step structure suitable for the fuel tank of a tractor. Summary of the invention

[0006] The purpose of the present invention is to provide a hinged telescopic boarding step which can effectively solve the problems of cracking of the step oil tank and high failure rate, has a simple structure and is easy to operate.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention discloses a hinged telescopic boarding step, which is integrated at a fuel tank bracket of a tractor, and comprises:

[0009] A step bracket movably connected to the front portion of the fuel tank bracket; and

[0010] A step integrated into the step support;

[0011] The boarding step has an unfolded state and a stowed state;

[0012] When the boarding step is in the stowed state, the step bracket moves to the lower part of the fuel tank and drives the step to be located at the front side of the lower part of the fuel tank;

[0013] When the boarding step is in the unfolded state, the step support portion moves to the front side of the fuel tank and drives the step to be located at the front side of the fuel tank.

[0014] Furthermore, the fuel tank bracket includes:

[0015] Fuel tank support superstructure; and

[0016] Fuel tank bracket lower structure;

[0017] The upper structure of the fuel tank support is assembled and fixed to the body of the tractor, and the lower structure of the fuel tank support extends outward in a horizontal direction;

[0018] The fuel tank is assembled and fixed on the lower structure of the fuel tank support.

[0019] Further, the step bracket is assembled on the lower structure of the fuel tank bracket;

[0020] The step support comprises:

[0021] a step fixing bracket fixedly connected to the inner side of the lower structure of the fuel tank bracket; and

[0022] A step support bracket is movably connected to the step fixing bracket via a hinge, and the step is fixed to one end of the step support bracket away from the hinge.

[0023] Furthermore, the step support bracket is provided with a first slide groove along the extension direction of the step, and the step fixing bracket is slidably connected to the step support bracket at one end close to the step support bracket through a pin shaft;

[0024] The step support bracket is rotatably connected to the first end of the hinge through a pin at one end away from the step;

[0025] The hinge is provided with a second sliding groove along its extension direction;

[0026] The hinge is connected to one end of the step fixing bracket away from the step supporting bracket through a pin shaft.

[0027] Furthermore, the first slide groove extends from a position close to the step to a middle position close to the step support bracket;

[0028] The first slide groove has a first limiting groove connected to the first slide groove at one end away from the step;

[0029] The second slide groove has a second limiting groove connected to the second slide groove at one end away from the step support bracket;

[0030] When the boarding step is in an unfolded state, the pin shaft is embedded in the corresponding limiting groove to position the step supporting bracket.

[0031] Furthermore, when the boarding step changes from an unfolded state to a retracted state, the pin shaft slides along the corresponding slide groove to a side away from the corresponding limit groove and drives the hinge and the step support bracket to move toward the bottom of the fuel tank.

[0032] Furthermore, a connecting rod is connected between the two step support brackets.

[0033] In the above technical solution, the hinged telescopic boarding step provided by the present invention has the following beneficial effects:

[0034] The boarding step of the present invention is movably connected to the front part of the fuel tank bracket, and is movably connected to the step support bracket carrying the step through a hinge. Under the action of the hinge, the step support bracket is rotatably connected relative to the step fixing bracket and can slide inward to store the step support bracket, so that the entire structure is formed into a rotating telescopic structure, which is convenient for the folding and unfolding of the step. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a structural schematic diagram of a step oil tank in the prior art;

[0037] Figure 2 A schematic diagram of the structure of a hinged telescopic boarding step in a stowed state provided by an embodiment of the present invention;

[0038] Figure 3 A structural schematic diagram of a hinged telescopic boarding step in an unfolded state provided by an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of the position of a hinged telescopic boarding step and a fuel tank in a stowed state provided by an embodiment of the present invention;

[0040] Figure 5 A schematic diagram of the position of a hinged telescopic boarding step and a fuel tank in an unfolded state provided by an embodiment of the present invention.

[0041] Description of reference numerals:

[0042] 1. Fuel tank bracket; 2. Step bracket; 3. Fuel tank;

[0043] 101. upper structure of fuel tank bracket; 102. lower structure of fuel tank bracket; 103. bolt;

[0044] 201, step fixing bracket; 202, step supporting bracket; 203, step; 204, hinge; 205, connecting rod; 206, pin shaft;

[0045] 20201, first slide groove; 20202, first limiting groove;

[0046] 20401, second slide groove; 20402, second limiting groove. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] See also Figures 2 to 5 As shown;

[0049] A hinged telescopic boarding step in this embodiment is integrated at a fuel tank bracket 1 of a tractor, and the boarding step includes:

[0050] A step bracket 2 movably connected to the front portion of the fuel tank bracket 1; and

[0051] A step 203 integrated into the step bracket 2;

[0052] The boarding step has an unfolded state and a stowed state;

[0053] When the boarding step is in the stowed state, the step bracket 2 moves to the lower part of the fuel tank 3 and drives the step to be located at the front side of the lower part of the fuel tank 3;

[0054] When the boarding step is in the unfolded state, the step bracket 2 partially moves to the front side of the fuel tank 3 and drives the step to be located in front of the fuel tank 3 .

[0055] Specifically, this embodiment discloses a telescopic boarding step integrated with a fuel tank bracket, which mainly includes a step bracket 2 and a step 203 integrated with the step bracket 2; wherein, this embodiment is different from the structure in the prior art in which the step is integrated with the fuel tank body, and uses the step bracket 2 to form a movable connection with the step 203, that is, when the step 203 needs to be used, the step bracket 2 is extended to the front side of the fuel tank 3 by the telescopic and rotating operation. When the step bracket 2 needs to be stored, the step bracket 2 is moved to the bottom of the fuel tank 3 by the telescopic and rotating operation, and the step 203 is kept at the front side of the bottom of the fuel tank 3. This structure solves the problem of complex processing of the fuel tank 3, and both the expansion and storage are realized by the step bracket 2, which is convenient for operation.

[0056] Preferably, the fuel tank bracket 1 of this embodiment includes:

[0057] A fuel tank support upper structure 101; and

[0058] Fuel tank support lower structure 102;

[0059] The fuel tank support upper structure 101 is assembled and fixed to the body of the tractor, and the fuel tank support lower structure 102 extends outward in the horizontal direction;

[0060] The fuel tank 3 is assembled and fixed on the lower structure 102 of the fuel tank support.

[0061] Preferably, the step bracket 2 of this embodiment is assembled on the fuel tank bracket lower structure 102;

[0062] The step bracket 2 includes:

[0063] A step fixing bracket 201 fixedly connected to the inner side of the fuel tank bracket lower structure 102; and

[0064] The step support bracket 202 is movably connected to the step fixing bracket 201 via a hinge 204 , and a step 203 is fixed to one end of the step support bracket 202 away from the hinge 204 .

[0065] First, this embodiment further defines the structure of the step bracket 2 based on the structure of the fuel tank bracket 1. The step bracket 2 mainly includes a step fixing bracket 201 and a step supporting bracket 202. The step fixing bracket 201 is directly assembled and fixed to the lower structure 102 of the fuel tank bracket. Bolts 103 can be used as the assembly and fixing fasteners of the two for easy disassembly. The step supporting bracket 202 is movably connected to the step fixing bracket 201 through the hinge 204 mentioned above.

[0066] More specifically:

[0067] The step support bracket 202 is provided with a first slide groove 20201 on one side close to the step 203 and along its extension direction, and the step fixing bracket 201 is slidably connected to the step support bracket 202 at one end close to the step support bracket 202 through a pin shaft 206;

[0068] One end of the step support bracket 202 away from the step 203 is rotatably connected to the first end of the hinge 204 through a pin 206;

[0069] The hinge 204 is provided with a second sliding groove 20401 along its extension direction;

[0070] The hinge 204 is connected to one end of the step fixing bracket 201 away from the step supporting bracket 202 via a pin shaft 206 .

[0071] The first slide groove 20201 of this embodiment extends from a position close to the step 203 to a middle position close to the step support bracket 202;

[0072] One end of the first slide groove 20201 away from the step 203 has a first limiting groove 20202 connected to the first slide groove 20201;

[0073] The second slide groove 20401 has a second limiting groove 20402 in communication with the second slide groove 20401 at one end away from the step support bracket 202;

[0074] When the boarding step is in the unfolded state, the pin shaft 206 is embedded in the corresponding limiting groove to position the step supporting bracket 202 .

[0075] When the boarding step changes from the unfolded state to the retracted state, the pin shaft 206 slides along the corresponding slide groove to a side away from the corresponding limit groove and drives the hinge 204 and the step support bracket 202 to move toward the bottom of the fuel tank 3.

[0076] In order to realize the movable connection between the step support bracket 202 and the step fixing bracket 201 through the hinge 204, a first slide groove 20201 is provided on the step support bracket 202, and a second slide groove 20401 is provided on the hinge 204. When the step 203 needs to be unfolded, the step 203 is pulled outward, driving the step support bracket 202 and the hinge 204 to move outward, and at this time, the pin 206 will move in the corresponding slide groove. When it moves to the corresponding limit groove, it can be rotated around the pin 206 to flip the step support bracket 202 upward, so that the step 203 is upward, and at this time, the pin 206 will be embedded in the corresponding limit groove. On the contrary, the step support bracket 202 and the hinge 204 move inward to complete the storage operation.

[0077] A connecting rod 205 is connected between the two step support brackets 202 .

[0078] In the above technical solution, the hinged telescopic boarding step provided by the present invention has the following beneficial effects:

[0079] The boarding step of the present invention is movably connected to the front part of the fuel tank bracket 1, and is movably connected to the step support bracket 202 carrying the step 203 through a hinge 204. Under the action of the hinge 204, the step support bracket 202 is rotatably connected relative to the step fixing bracket 201 and can slide inward to store the step support bracket 202, so that the entire structure is formed into a rotating telescopic structure, which is convenient for the folding and unfolding of the step 203.

[0080] The hinged telescopic step for boarding the vehicle of the present invention is an independent structure and does not affect the state and strength of the surrounding parts. In order to ensure that the step space structure does not affect the outer dimensions of the vehicle, it is designed as a telescopic and rotating structure.

[0081] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hinged retractable boarding step, which is integrated into a fuel tank bracket (1) of a tractor, characterized in that: The boarding step comprises: a step bracket (2) movably connected to the front portion of the fuel tank bracket (1); and A step (203) integrated into the step support (2); The boarding step has an unfolded state and a stowed state; When the boarding step is in the stowed state, the step bracket (2) moves to the lower part of the fuel tank (3) and drives the step (203) to be located at the front side of the lower part of the fuel tank (3); When the boarding step is in an unfolded state, the step bracket (2) partially moves to the front side of the fuel tank (3) and drives the step (203) to be located in front of the fuel tank (3); The fuel tank bracket (1) comprises: A fuel tank support upper structure (101); and A fuel tank support lower structure (102); The upper structure of the fuel tank support (1) is assembled and fixed to the body of the tractor, and the lower structure (102) of the fuel tank support extends outward in a horizontal direction; The fuel tank (3) is assembled and fixed on the lower structure (102) of the fuel tank support; The step bracket (2) is assembled on the lower structure (102) of the fuel tank bracket; The step support (2) comprises: a step fixing bracket (201) fixedly connected to the inner side of the lower structure (102) of the fuel tank bracket; and A step support bracket (202) movably connected to the step fixing bracket (201) via a hinge (204), wherein the step (203) is fixed to one end of the step support bracket (202) away from the hinge (204); The step support bracket (202) is provided with a first sliding groove (20201) on one side close to the step (203) and along its extension direction, and the step fixing bracket (201) is slidably connected to the step support bracket (202) via a pin shaft (206) at one end close to the step support bracket (202); One end of the step support bracket (202) away from the step (203) is rotatably connected to the first end of the hinge (204) via a pin shaft (206); The hinge (204) is provided with a second sliding groove (20401) along its extension direction; The hinge (204) is connected to an end of the step fixing bracket (201) away from the step supporting bracket (202) via a pin shaft (206); The first slide groove (20201) extends from a position close to the step (203) to a middle position close to the step support bracket (202); The first slide groove (20201) has a first limiting groove (20202) connected to the first slide groove (20201) at one end away from the step (203); The second slide groove (20401) has a second limiting groove (20402) connected to the second slide groove (20401) at one end away from the step support bracket (202); When the boarding step is in an unfolded state, the pin shaft (206) is embedded in the corresponding limiting groove to position the step support bracket (202); When the boarding step changes from an unfolded state to a retracted state, the pin shaft (206) slides along the corresponding slide groove to a side away from the corresponding limit groove and drives the hinge (204) and the step support bracket (202) to move toward the bottom of the fuel tank (3).

2. The hinged telescopic boarding step according to claim 1, characterized in that: A connecting rod (205) is connected between the two step support brackets (202).

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