Integrally-formed ladder pedal

Abstract

The utility model relates to an integrally formed ladder pedal, which adopts a steel plate integrally punched and formed structure, is integrally quadrilateral and comprises a pedal part and a downward peripheral vertical edge folding part, a middle connecting rib connected with the front side and the rear side of the pedal part is arranged in the middle of the pedal part in the short side direction, and a left treading area and a right treading area are formed on the left side and the right side of the middle connecting rib on the pedal part respectively. Treading grooves are formed in the left treading area and the right treading area, a plurality of treading strips are indirectly arranged in the treading grooves in the left side and the right side in the front-back direction, the treading strips extend in the left-right direction, and the treading strips located on the foremost portion and the rearmost portion are directly connected with the front edge portions and the rear edge portions of the treading grooves respectively. The inner ends and the outer ends of the middle treading strips are connected with the middle connecting ribs and the corresponding side edge portions of the pedal portion through torsion type connectors respectively, and sawtooth-shaped protrusions playing an anti-skidding and reinforcing role are arranged at the upper ends of the treading strips. The pedal saves manufacturing time and reduces manufacturing cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of corn harvesters, and in particular relates to an integrally formed ladder pedal. Background Art

[0002] The ladder pedals on existing corn harvesters generally adopt a sheet metal welding structure, which consists of multiple sheet metal strips and a middle connecting rod. Four of the multiple sheet metal strips are welded to form the four sides of the pedal, and the other sheet metal strips are welded to the inside of the four sides through both ends, and the middle connecting rod is welded between the sheet metal strips inside the sides. The thickness of the sheet metal strips is generally about 3mm. According to the safety standard requirements, at least a serrated structure needs to be set on the upper end of the sheet metal strip inside the sides.

[0003] The existing welding forming method of ladder steps has the disadvantages of heavy weight, long manufacturing time and high manufacturing cost. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide an integrally formed ladder step which saves manufacturing time, reduces manufacturing costs, improves structural strength, and can reduce weight.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0006] An integrally formed ladder step, characterized in that: the step is formed by integrally stamping a steel plate, the step is in a quadrilateral shape as a whole, the step comprises a step portion and a downward peripheral vertical folded edge portion, the peripheral vertical folded edge portion is connected to the edge portion of the bottom of the step by a rounded transition; a middle connecting rib connecting the front and rear edges of the step portion is provided at the middle position along the short side direction of the step portion, and the left and right sides of the middle connecting rib on the step portion respectively constitute a left stepping area and a right stepping area; in the left stepping area and the right stepping area A treading groove is provided, and multiple treading strips are indirectly provided in the treading grooves on the left and right sides along the front and rear directions. The treading strips are extended along the left and right directions. The treading strips located at the front and rear parts of the two treading grooves are directly connected to the front and rear parts of the treading grooves respectively. The inner ends and outer ends of the multiple treading strips located between the front and rear treading strips are respectively connected to the middle connecting ribs and the corresponding side parts of the pedal part through torsion-type connecting heads. A serrated protrusion that plays an anti-slip reinforcement role is provided at the upper end of the treading strip.

[0007] Moreover, the pedals are made of 2mm thick cold-rolled steel plate.

[0008] Moreover, the outer contour of the pedal is composed of two equal-length straight short sides, a straight long side and a convex curved long side. The pedal comprises a pedal portion and a downward peripheral vertical folded edge portion.

[0009] Moreover, bolt insertion holes are arranged on the two short side surfaces and the straight long side surface of the peripheral vertical folded edge portion.

[0010] Moreover, a reinforcing protrusion extending along the short side direction of the pedal is arranged on the middle connecting rib.

[0011] Moreover, the tread strips in the left tread area and the right tread area are symmetrically arranged.

[0012] The advantages and positive effects of the utility model are:

[0013] 1. The pedal of the utility model adopts an integrated stamping structure, which greatly saves working hours and improves production efficiency compared with the existing pedals formed by welding.

[0014] 2. The pedal of the utility model is a single-plate stamping structure, which reduces costs from cutting to forming compared to the existing welding structure of multiple plates.

[0015] 3. The utility model adopts an integrated structure. Compared with the existing welded structure, the structural strength can be improved by using thinner steel plates. After trial use of the prototype product, the structural strength is increased by 40%, and the weight is about 64% of the original ladder pedal, achieving better comprehensive performance.

[0016] 4. In the utility model, a sawtooth protrusion is arranged on the upper end of the tread strip to clean the mud on the sole, thereby preventing slipping and avoiding injuries. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 yes Figure 1 A partial enlarged view of the sawtooth-shaped protrusion in the middle;

[0019] Figure 3 It is a top view of the utility model. DETAILED DESCRIPTION

[0020] The structure of the utility model is further described below with reference to the accompanying drawings and through embodiments. It should be noted that the embodiments are descriptive rather than restrictive.

[0021] An integral ladder step, see Figure 1-Figure 3The invention point is: the pedal adopts an integrated steel plate stamping structure, the steel plate adopts a 2mm thick cold-rolled steel plate, the pedal is a quadrilateral as a whole, and its outer contour is composed of two equal-length straight short sides 1.1, a straight long side 1.2 and a convex curved long side 1.3. The pedal includes a pedal portion 2 and a downward peripheral vertical folded edge portion 1. The peripheral vertical folded edge portion is connected to the edge of the bottom of the pedal through a rounded transition. Bolt insertion holes 8 are provided on the two short side surfaces of the peripheral vertical folded edge portion and the straight long side for inserting bolts to fix the pedal to the ladder frames on both sides of the ladder.

[0022] The middle position of the pedal part along the short side direction is provided with a middle connecting rib 3 connecting the front and rear sides of the pedal part. Furthermore, a reinforcing protrusion 4 extending along the short side direction of the pedal is provided on the middle connecting rib, which plays a role in strengthening the strength of the pedal. The left and right sides of the middle connecting rib on the pedal part respectively constitute a left treading area and a right treading area. A treading groove 5 is symmetrically provided in the left and right treading areas. A plurality of treading strips 7 are provided in the treading grooves on the left and right sides along the front and rear directions according to a set spacing. The treading strips are extended in the left and right directions. The treading strips located at the front and rear parts of the two treading grooves are directly connected to the front and rear parts of the treading grooves respectively. The inner ends and outer ends of the plurality of treading strips located between the front and rear treading strips are respectively connected to the middle connecting rib and the corresponding side parts of the pedal part through a twisting connector 6. A sawtooth protrusion 7.1 is provided at the upper end of the treading strip to play a role in anti-slip reinforcement.

[0023] The one-piece ladder step is formed by one-piece stamping using a forming mold. When preparing the material, it is only necessary to cut a piece of material using a laser cutting device.

[0024] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. An integrally formed ladder step, characterized in that: The pedal adopts an integrated stamping structure of steel plates, and the pedal is in a quadrilateral shape as a whole. The pedal includes a pedal part and a downward outer vertical folded edge part, and the outer vertical folded edge part is connected to the edge of the bottom of the pedal by a rounded transition; an intermediate connecting rib connecting the front and rear edges of the pedal part is arranged in the middle position along the short side direction of the pedal part, and the left and right sides of the intermediate connecting rib on the pedal part respectively constitute a left treading area and a right treading area; a treading groove is arranged in the left and right treading grooves on the left and right sides, and a plurality of treading strips are indirectly arranged along the front and rear directions, and the treading strips extend along the left and right directions, and the treading strips located at the front and rear parts of the two treading grooves are directly connected to the front and rear parts of the treading grooves respectively, and the inner ends and outer ends of the plurality of treading strips located between the front and rear treading strips are respectively connected to the intermediate connecting rib and the corresponding side parts of the pedal part through a torsional connector, and a serrated protrusion is arranged at the upper end of the treading strip to play an anti-slip reinforcement role.

2. The one-piece ladder step according to claim 1, characterized in that: The pedals are made of 2mm thick cold-rolled steel plate.

3. The one-piece ladder step according to claim 1, characterized in that: The outer contour of the pedal is composed of two equal-length straight short sides, a straight long side and a convex curved long side.

4. The one-piece ladder step according to claim 2, characterized in that: Bolt insertion holes are arranged on two short side surfaces and a straight long side surface of the outer vertical folded edge portion.

5. The one-piece ladder step according to claim 1, characterized in that: A reinforcing protrusion extending along the short side direction of the pedal is arranged on the middle connecting rib.

6. The one-piece ladder step according to claim 1, characterized in that: The tread strips in the left tread area and the right tread area are symmetrically arranged.

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