Telescopic ladder structure for tracked vehicle

Abstract

The utility model relates to a kind of telescopic car ladder structure for tracked tractor in the technical field of tracked tractor, comprising: fixed car ladder, including two parallelly arranged fixed side plates, the bottom of fixed side plate is equipped with lower fixed link, top is equipped with upper hanging link, and the bottom of fixed side plate is further equipped with limit structure;Telescopic car ladder, including two parallelly arranged movable side plates, the movable side plate is equipped with the sliding groove of sliding cooperation with lower fixed link along its length direction, the top rear side of movable side plate is equipped with the hook groove of the joint cooperation with upper hanging link;The utility model is slid by the sliding design of telescopic car ladder, can flexibly adjust car ladder length according to terrain requirement, and in the process of adjusting car ladder length, without borrowing side space, solve the technical problem that when side space is smaller in prior art, cannot complete the technical problem of adjusting car ladder length operation.

Description

Technical Field

[0001] This utility model relates to the field of tracked tractor technology, and in particular to a telescopic ladder structure for tracked tractors. Background Technology

[0002] A tracked tractor's running gear consists of idler wheels, follower wheels, track rollers, drive wheels, and tracks. During operation, the drive wheels rotate around the tracks in a circular motion, while the track rollers roll forward or backward along the track's tracks.

[0003] When existing tracked tractors operate in environments such as uphill, paddy fields, or dry fields with high ridges, the fixed ladder's closest step to the ground is subject to impacts, easily causing deformation or damage to the ladder. This affects the tractor's ability to cross ridges and can also cause damage to the ridges themselves. Furthermore, on larger tractors, the outermost edge of the ladder extends vertically beyond the outermost edge of the rear tire, making the ladder section prone to scraping when traversing narrow paths, hindering the tractor's operation.

[0004] The existing Chinese patent with publication number CN219638753U discloses a folding ladder for a tracked tractor, including a fixed ladder and a movable ladder hinged to the bottom of the fixed ladder. The movable ladder can be flipped upwards, so that the groove on the movable ladder is engaged with the second bolt at the bottom of the fixed ladder, thereby fixing the movable ladder and preventing it from interfering with the operation of the tracked tractor. However, this ladder still has some shortcomings: 1. Flipping the movable ladder requires the use of side space. When the side space is small, it is impossible to fold or unfold the movable ladder. 2. After the driver gets on the vehicle via the ladder, it is difficult for the driver to directly touch the movable ladder with his hands (the distance increases as you get closer to the bottom of the movable ladder). Other tools or assistance from people outside the vehicle are needed to flip the movable ladder. 3. When the driver puts down the movable ladder after getting on the vehicle, he pushes it outwards, causing it to flip freely under gravity. This can cause the movable ladder to collide with the second bolt, damaging the second bolt.

[0005] To address this, we designed a telescopic ladder structure for tracked tractors. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model discloses a telescopic ladder structure for tracked tractors.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A telescopic ladder structure for a tracked tractor includes:

[0009] A fixed car ladder includes two parallel fixed side plates. The bottom of the fixed side plates is provided with a lower fixed rod, the top is provided with an upper hanging rod, and the bottom of the fixed side plates is also provided with a limiting structure.

[0010] The telescopic ladder includes two parallel movable side plates. The movable side plates are provided with a sliding groove along their length direction to slide with a lower fixed rod. The top rear side of the movable side plates is provided with a hook groove to engage with an upper hanging rod.

[0011] The limiting structure, in conjunction with the lower fixing rod, is used to limit the position of the telescopic ladder in its extended state.

[0012] Furthermore, the two fixed side plates of the fixed vehicle ladder are provided with a top plate at the top and a first step at the bottom.

[0013] Furthermore, the bottom of the two movable side panels of the telescopic ladder is provided with a second step.

[0014] Furthermore, the fixed side plate has inward bending portions on both the front and rear sides to increase the structural strength of the fixed side plate.

[0015] Furthermore, the rear inner bend has a mounting hole.

[0016] Furthermore, both the front and rear sides of the movable side plate are provided with outward bending portions to increase the structural strength of the movable side plate.

[0017] Furthermore, the top of the movable side panel is provided with a lifting handle, which extends upward to control the telescopic movement of the telescopic ladder.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. Through the sliding design of the telescopic ladder, the length of the ladder can be flexibly adjusted according to the terrain requirements. In the process of adjusting the length of the ladder, there is no need to use the side space, which solves the technical problem in the existing technology that it is impossible to adjust the length of the ladder when the side space is small.

[0020] 2. The telescopic ladder is manually controlled by pulling the handle, allowing the driver to complete the telescopic operation from inside the vehicle without the need for assistance from others or tools, greatly improving operational convenience. It also allows for better control of the telescopic ladder's position, solving the technical problem in existing technologies where the movable ladder freely flips under gravity, causing it to collide with the second bolt. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first structure of this utility model;

[0022] Figure 2This is a schematic diagram of the second structure of this utility model;

[0023] Figure 3 This is a left view of the second structure of this utility model;

[0024] Figure 4 This is a schematic diagram of another state of the second structure of this utility model.

[0025] In the diagram: 1. Fixed ladder; 11. Fixed side panel; 12. Lower fixed rod; 13. Upper hanging rod; 14. Limiting structure; 15. Top plate; 16. First step; 17. Inner bend; 171. Mounting hole; 2. Telescopic ladder; 21. Movable side panel; 211. Slide groove; 212. Hook groove; 22. Second step; 23. Outer bend; 24. Lifting handle. Detailed Implementation

[0026] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0027] Example 1, in conjunction with Appendix Figure 1-4 A telescopic ladder structure for a tracked tractor includes a fixed ladder 1 and a telescopic ladder 2.

[0028] The fixed ladder 1 is composed of two parallel fixed side plates 11; preferably, the fixed side plates 11 are made of steel plates with a thickness of 5mm and the surface is treated with anti-rust treatment.

[0029] Two horizontal lower fixing rods 12 are welded to the bottom of the fixed side plate 11; preferably, the lower fixing rods 12 are round steel with a diameter of 20mm, and both ends extend to the outside of the fixed side plate 11.

[0030] The top of the fixed side plate 11 is welded with an upper hanging rod 13; preferably, the upper hanging rod 13 is a round steel with a diameter of 15mm, which is set perpendicular to the fixed side plate 11.

[0031] The bottom of the fixed side plate 11 is also provided with a limiting structure 14, which is a stop welded to the end of the lower fixed rod 12 to limit the sliding stroke of the telescopic ladder 2. If necessary, the limiting structure 14 can also be the end of the strip steel plate extending from the rear of the first step 16, that is, the end of the strip steel plate extending to the outside of the fixed side plate 11 to serve as the limiting structure 14.

[0032] The top of the fixed side plate 11 is bolted to a top plate 15. As needed, the top plate 15 is a long strip steel plate with a width that matches the spacing between the fixed side plates 11 and has anti-slip grooves on its surface.

[0033] A first pedal 16 is welded to the bottom of the fixed side plate 11. The first pedal 16 is a horizontally arranged strip steel plate, and its two ends are fixed to the fixed side plate 11 by M10 bolts or welding. The upper surface of the first pedal 16 is stamped with parallel anti-slip patterns (preferably, the pattern depth is 2mm) to enhance friction.

[0034] The front and rear sides of the fixed side plate 11 are provided with inward bends 17 to increase the bending strength of the side plate. Preferably, the inward bends 17 are formed by bending the edge of the steel plate inward at 90°. The width of the rear inward bend 17 is 20mm, and the width of the front inward bend 17 is 10mm. Two mounting holes 171 with a diameter of 12mm are provided on the rear inward bend 17 for mounting the fixed ladder 1 to the tractor body with bolts.

[0035] The telescopic ladder 2 consists of two parallel movable side plates 21. The movable side plates 21 are made of steel plates with a thickness of 4mm and the surface is galvanized.

[0036] The movable side panel 21 has a long strip-shaped sliding groove 211 along its length. The width of the sliding groove 211 is slightly larger than the diameter (20.5mm) of the lower fixed rod 12, and its length is consistent with that of the movable side panel 21. The sliding groove 211 and the lower fixed rod 12 form a sliding pair, allowing the telescopic ladder 2 to slide horizontally along the lower fixed rod 12.

[0037] The top rear side of the movable side panel 21 is provided with a hook groove 212, which is a U-shaped groove with its opening direction perpendicular to the upper hanging rod 13. When the telescopic ladder 2 is fully retracted, the hook groove 212 engages with the upper hanging rod 13 to achieve locking.

[0038] A second pedal 22 is welded to the bottom of the movable side plate 21. The second pedal 22 has the same structure as the first pedal 16, and will not be described in detail here.

[0039] The movable side plate 21 has outwardly bent portions 23 on both its front and rear sides to increase its bending strength. Preferably, the outwardly bent portions 23 are formed by bending the edge of the steel plate outward by 30° and have a width of 10mm.

[0040] A lifting handle 24 is welded to the top of the movable side panel 21, extending upwards so that the driver can operate it from inside the vehicle; the specific height is not limited. If necessary, its surface is covered with a rubber sleeve to facilitate the driver's application of force to control the extension and retraction of the telescopic ladder 2.

[0041] Working Principle: 1. Telescopic Operation: After the driver pulls the telescopic ladder 2 upward by lifting the handle 24, the top of the telescopic ladder 2 is pushed outward. At this time, the movable side plate 21 slides down to the bottom along the lower fixed rod 12. Then, the driver releases the handle 24. Under the action of gravity, the movable side plate 21 stops after contacting the limiting structure 14. At this time, the second pedal 22 is in the extended / deployed state. 2. Locking and Storage: When it is necessary to retract the ladder, gently lift the handle 24 upward until it reaches the upper limit. Then, pull the telescopic ladder 2 inward and gently release the handle 24 while pulling inward. This causes the movable side plate 21 to move downward until the hook slot 212 is engaged and fixed on the upper hook rod 13.

[0042] Example 2 differs from Example 1 in that both the lower fixing rod 12 and the upper hanging rod 13 are studs, which are threaded to the fixing side plate 11, making it easy to replace when the lower fixing rod 12 and the upper hanging rod 13 are damaged.

[0043] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A telescopic ladder structure for a tracked tractor, characterized in that, include: The fixed car ladder (1) includes two parallel fixed side plates (11). The bottom of the fixed side plate (11) is provided with a lower fixed rod (12) and the top is provided with an upper hanging rod (13). The bottom of the fixed side plate (11) is also provided with a limiting structure (14). The telescopic ladder (2) includes two parallel movable side plates (21). The movable side plates (21) are provided with a sliding groove (211) along their length direction that slides and engages with the lower fixed rod (12). The top rear side of the movable side plates (21) is provided with a hook groove (212) that engages with the upper hanging rod (13). The limiting structure (14) works in conjunction with the lower fixing rod (12) to limit the position of the telescopic ladder (2) in the extended state.

2. The telescopic ladder structure for a tracked tractor according to claim 1, characterized in that: The fixed ladder (1) has a top plate (15) on the top of the two fixed side plates (11) and a first step (16) at the bottom.

3. The telescopic ladder structure for a tracked tractor according to claim 1, characterized in that: The telescopic ladder (2) has a second step (22) at the bottom of the two movable side plates (21).

4. The telescopic ladder structure for a tracked tractor according to claim 1, characterized in that: The fixed side plate (11) has an inner bend (17) on both the front and rear sides to increase the structural strength of the fixed side plate (11).

5. The telescopic ladder structure for a tracked tractor according to claim 4, characterized in that: The rear inner bend (17) has a mounting hole (171).

6. The telescopic ladder structure for a tracked tractor according to claim 1, characterized in that: The movable side plate (21) has an outward bending part (23) on both the front and rear sides to increase the structural strength of the movable side plate (21).

7. The telescopic ladder structure for a tracked tractor according to claim 1, characterized in that: The top of the movable side panel (21) is provided with a lifting handle (24), which extends upward and is used to control the telescopic movement of the telescopic ladder (2).

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