A ladder for construction machinery

Abstract

This utility model discloses a ladder for engineering machinery. The side plate and the first ladder body are connected by a connecting rod. The two ends of the connecting rod are connected to the side plate and the first ladder body respectively by pins. The side plate is provided with a first limiting block, and the first limiting block is correspondingly provided with the connecting rod. The first ladder body is provided with a plurality of first steps. The bottom of the first ladder body is provided with a second ladder body through a pivot. This utility model can extend the length of the ladder, making it easier for the driver to enter the cab. This device also provides a pull-out first ladder body, which ensures that the driver's feet can always cooperate with the steps after being pulled out, making it easy for the driver to step on and improving the safety of climbing. This device also provides a locking mechanism to facilitate the opening and retraction of the second ladder. After the second ladder body is retracted, it is no different from a traditional fixed foot ladder, does not occupy other space, and is also easy to upgrade and improve traditional fixed foot ladders.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically a ladder for engineering machinery. Background Technology

[0002] Construction machinery is an important part of the equipment manufacturing industry. In general terms, construction machinery refers to the mechanical equipment necessary for comprehensive mechanized construction projects, including earthwork construction, road construction and maintenance, mobile lifting and unloading operations, and various building projects.

[0003] Because construction machinery is generally large, the cab is located at a high position, such as excavators. The foot ladder for climbing construction machinery is an indispensable auxiliary device for construction machinery operators in their daily work. It is mainly used to safely and conveniently enter the cab from the ground. Generally, a few fixed foot ladders are set on one side of the cab to facilitate the operator's entry into the cab. The inventors discovered in practical use that the height of the wheels or tracks of construction machinery is relatively high, which means that the foot ladder cannot be set very low. When drivers use the foot ladder to enter the cab, they usually step on the wheels or slewing platform to climb the foot ladder and then enter the cab. However, due to the complex working conditions of construction machinery, when the construction machinery is on a slope or the foot ladder is on the side of a ditch, the wheels or slewing platform are raised, making it difficult for drivers to easily step on the wheels or slewing platform and making it inconvenient for drivers to enter the cab. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a ladder for engineering machinery, thereby solving at least one of the aforementioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A ladder for engineering machinery includes side plates on both sides and a first ladder body disposed between the two side plates. The side plates and the first ladder body are connected by a connecting rod. The two ends of the connecting rod are respectively connected to the side plates and the first ladder body by pins. The side plates are provided with first limiting blocks and the first limiting blocks are correspondingly disposed with the connecting rods. The first ladder body is provided with a plurality of first steps. A second ladder body is provided at the bottom of the first ladder body through a pivot. The second ladder body is provided with a plurality of second steps, and the second steps are correspondingly disposed with the first steps. Locking shafts are provided on both sides of the second ladder body. The side plates are provided with locking grooves corresponding to the locking shafts. A locking body mechanism is provided at the locking grooves, and the locking body mechanism is configured to cooperate with the locking shafts. The lock mechanism includes a lever, one end of which is connected to a side wall via a pin, and the other end of which is provided with a stop block that cooperates with the lock groove. A second limiting block is provided below the lever and is correspondingly provided with the lever. A spring seat is provided above the lever, and a spring is provided between the spring seat and the upper end of the lever.

[0006] Furthermore, a first anti-slip structure is provided on the upper side of the first pedal, and a second anti-slip structure is provided on both the upper and lower sides of the second pedal, wherein the first anti-slip structure and the second anti-slip structure are identical.

[0007] Furthermore, the lower end wall of the lock groove has an arc-shaped structure.

[0008] Furthermore, one side of the stop block is provided with a slope structure.

[0009] Furthermore, the upper end of the lever and the lower end of the spring seat are provided with limiting shafts, and the two ends of the spring are respectively fitted onto the limiting shafts at the upper and lower ends.

[0010] Furthermore, a back plate is provided on the rear side of the two side plates, and a mounting plate is provided on one side of the side plates, with a plurality of bolt holes provided on the mounting plate.

[0011] Furthermore, the upper part of the side panel is provided with a handrail structure.

[0012] The beneficial effects of this utility model are: The second ladder body of this utility model can be opened to extend the length of the ladder. In complex working conditions where the wheels or rotating platform are raised, the driver can open the second ladder body to extend the ladder length, making it easier for the driver to enter the cab. This device also has a pull-out first ladder body, which ensures that the driver's feet can always cooperate with the pedals after being pulled out, making it easier for the driver to step on and improving safety during climbing. This device also has a locking mechanism to facilitate the opening and retraction of the second ladder. When the second ladder body is retracted, it is no different from a traditional fixed foot ladder, does not occupy other space, and is also convenient for upgrading and improving traditional fixed foot ladders. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the connecting rod part of this utility model.

[0016] Figure 3 This is a schematic diagram of the lock body mechanism of this utility model.

[0017] Figure 4 This is a schematic diagram of the present invention when folded up.

[0018] The attached diagram lists the components represented by each number as follows: Side plate 1; First ladder body 2; First step 3; First anti-slip structure 4; Connecting rod 5; First limiting block 6; Second ladder body 7; Rotating shaft 8; Second step 9; Second anti-slip structure 10; Locking shaft 11; Locking groove 12; Locking mechanism 13; Lever 131; Stop block 132; Spring seat 133; Spring 134; Second limiting block 135; Back plate 14; Mounting plate 15; Bolt hole 16; Handrail structure 17. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example 1: See Figures 1 to 4This is a schematic diagram of the structure of this utility model, including side plates 1 on both sides and a first ladder body 2 disposed between the two side plates 1. The side plates can be directly connected to one side of the cab by welding. The side plates 1 and the first ladder body 2 are connected by a connecting rod 5. The two ends of the connecting rod 5 are respectively connected to the side plates 1 and the first ladder body 2 by pins. The side plates 1 are provided with a first limiting block 6, and the first limiting block 6 is correspondingly arranged with the connecting rod 5. After the first ladder body 2 is retracted, the connecting rod 5 tilts. After the second ladder body 7 is extended, the connecting rod 5 horizontally supports the second ladder body 7 under the limitation of the first limiting block 6. The first ladder body 2 is provided with a plurality of first pedals 3. The bottom of the first ladder body 2 is provided with the second ladder body 7 through a pivot 8. The second ladder body 7 can rotate around the pivot 8. When the second ladder body 7 is retracted, it is parallel to the first ladder body 2. When the second ladder body 7 is opened, it is on the same plane as the first ladder body 2. The second ladder body 7 is provided with several second steps 9, which are corresponding to the first steps 3. When the second ladder body 7 is retracted, the corresponding first steps 3 and second steps 9 form a plane. Locking shafts 11 are provided on both sides of the second ladder body 7. The side plate 1 is provided with locking grooves 12 corresponding to the locking shafts 11. When the second ladder body 7 is retracted, the locking shafts 11 enter the locking grooves 12. In order to facilitate the opening of the second ladder body 7, the locking shafts 11 extend out of the lock body structure for easy gripping by the operator. A locking body mechanism 13 is provided at the locking groove 12. The locking body mechanism 13 is configured to cooperate with the locking shafts 11 to lock the locking shafts 11 and fix the second ladder body 7. The lock body mechanism 13 includes a lever 131. One end of the lever 131 is connected to the side wall via a pin, and the other end of the lever 131 is provided with a stop block 132. The stop block 132 limits and fixes the lock shaft 11. When the inner side of the stop block 132 is provided with an arc-shaped structure that fits into the lock groove 12 of the lock shaft 11, it fixes the lock shaft 11 and prevents the lock shaft 11 from shaking. The stop block 132 and the lock groove 12 are configured to cooperate. A second limiting block 135 is provided below the lever 131. The second limiting block 135 is configured to correspond with the lever 131 and limit the lever 131. When the lock shaft 11 is disengaged from the lock groove 12, the lever 131 remains horizontal and the stop block 132 cooperates with the lock groove 12. A spring seat 133 is provided above the lever 131. A spring 134 is provided between the spring seat 133 and the upper end of the lever 131. The spring force of the spring 134 keeps the lever 131 locked to the lock shaft 11.

[0026] Specifically, the upper side of the first step 3 is provided with a first anti-slip structure 4, which plays an anti-slip role. The upper and lower sides of the second step 9 are provided with second anti-slip structures 10, so that the second ladder body 7 is still provided with second anti-slip structures 10 after it is opened, making it easier for the driver to climb. The first anti-slip structure 4 and the second anti-slip structure 10 are the same.

[0027] Specifically, the lower end wall of the lock groove 12 has an arc-shaped structure to guide the lock shaft 11.

[0028] Specifically, one side of the stop block 132 is provided with a sloping structure. When the locking shaft 11 enters the locking groove 12, the side of the locking shaft 11 pushes the stop block 132 upward, causing the lever 131 to move upward. When the locking shaft 11 is reset, the lever 131 is reset and locked by the elastic force of the spring 134.

[0029] Specifically, the upper end of the lever 131 and the lower end of the spring seat 133 are provided with limit shafts, and the two ends of the spring 134 are fitted onto the limit shafts at the upper and lower ends to limit and fix the spring 134 and prevent the spring 134 from coming out.

[0030] Specifically, a back plate 14 is provided on the rear side of both side plates 1, and a mounting plate 15 is provided on one side of the side plate 1. The mounting plate 15 is provided with several bolt holes 16, which can be installed to the side of the cab by bolts.

[0031] Specifically, the upper part of the side panel 1 is equipped with a handrail structure 17, which makes it easier for the driver to climb.

[0032] The working principle of this utility model: The device is bolted to one side of the cab. In complex working conditions, the slewing platform is raised, making it inconvenient for the driver to step on it. The driver holds the protruding locking shafts 11 on both sides and uses his thumbs to push the blocks 132 on both sides upwards, disengaging the blocks 132 from the locking grooves 12. Then, he pulls the locking shafts 11 to open the second climbing ladder body 7. Under the action of gravity, the first climbing ladder body 2, in conjunction with the connecting rod 5, falls. When the connecting rod 5 hits the first limit block 6, it supports the first climbing ladder body 2. At this time, the first climbing ladder body 2 is pulled out, and the first climbing ladder body 2 and... The second ladder body 7 is on the same plane. The operator holds the handrail structure 17 and steps on the second pedal 9 and the first pedal 3 to climb into the cab. Other personnel outside help or wait until the complex working environment is cleared before folding the second ladder body 7 and the first ladder body 2 together and lifting them upwards to reset the first ladder body 2. The locking shaft 11 enters the locking groove 12. The side of the locking shaft 11 pushes the stop block 132 upwards to move the lever 131 upwards. When the locking shaft 11 is reset, the lever 131 is reset and locked by the elastic force of the spring 134.

[0033] The second ladder body 7 of this utility model can be opened to extend the length of the ladder. When the wheels or rotating platform are raised due to complex working conditions, the driver can open the second ladder body 7 to extend the length of the ladder, making it easier for the driver to enter the cab. This device also has a pull-out first ladder body 2. After the first ladder body 2 is pulled out, the driver's feet can always cooperate with the pedals, making it easier for the driver to step on and improving the safety of climbing. This device also has a locking mechanism 13 to facilitate the opening and closing of the second ladder. When the second ladder body 7 is closed, it is no different from a traditional fixed foot ladder, does not occupy other space, and is also easy to upgrade and improve the traditional fixed foot ladder.

[0034] The above are merely optional embodiments of this utility model and are not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0035] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A crawling ladder for a working machine, characterized in that: The system includes side plates (1) on both sides and a first ladder body (2) between the side plates (1). The side plates (1) and the first ladder body (2) are connected by a connecting rod (5). The two ends of the connecting rod (5) are connected to the side plates (1) and the first ladder body (2) respectively by pins. The side plates (1) are provided with first limiting blocks (6) and the first limiting blocks (6) are correspondingly provided with the connecting rod (5). The first ladder body (2) is provided with a plurality of first steps (3). The bottom of the main body (2) is provided with a second climbing body (7) via a pivot (8). The second climbing body (7) is provided with a number of second steps (9). The second steps (9) are provided in correspondence with the first steps (3). Locking shafts (11) are provided on both sides of the second climbing body (7). The side plate (1) is provided with a locking groove (12) corresponding to the locking shaft (11). A locking body mechanism (13) is provided at the locking groove (12). The locking body mechanism (13) is configured to cooperate with the locking shaft (11). The lock body mechanism (13) includes a lever (131), one end of which is connected to the side wall via a pin, and the other end of which is provided with a stop block (132). The stop block (132) is configured to cooperate with the lock groove (12). A second limiting block (135) is provided below the lever (131), and the second limiting block (135) is configured to correspond with the lever (131). A spring seat (133) is provided above the lever (131), and a spring (134) is provided between the spring seat (133) and the upper end of the lever (131).

2. A crawling ladder for a working machine according to claim 1, characterized in that The first pedal (3) is provided with a first anti-slip structure (4) on its upper side, and the second pedal (9) is provided with a second anti-slip structure (10) on both its upper and lower sides. The first anti-slip structure (4) and the second anti-slip structure (10) are the same.

3. A crawling ladder for a construction machine according to claim 1, characterized in that: The lower end wall of the lock groove (12) has an arc-shaped structure.

4. A crawling ladder for a construction machine according to claim 1, characterized in that: One side of the stop block is provided with a sloping structure.

5. A crawling ladder for a construction machine according to claim 1, characterized in that: The upper end of the lever (131) and the lower end of the spring seat (133) are provided with limit shafts, and the two ends of the spring (134) are respectively fitted onto the limit shafts at the upper and lower ends.

6. A crawling ladder for a construction machine according to claim 1, characterized in that: A back plate (14) is provided on the rear side of the side plates (1) on both sides, and a mounting plate (15) is provided on one side of the side plates (1), and the mounting plate (15) is provided with a number of bolt holes (16).

7. A crawling ladder for a construction machine according to claim 1, characterized in that: The upper part of the side panel (1) is provided with a handrail structure (17).

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