CN212985091U

CN212985091U - Telescopic ladder and land leveler

Info

Publication number: CN212985091U
Application number: CN202021356888.XU
Authority: CN
Inventors: 吴自龙; 殷实; 李建科
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-04-16
Anticipated expiration: 2030-07-10

Abstract

The application relates to the technical field of engineering mechanical equipment, in particular to a telescopic ladder stand and a land leveler. The telescopic ladder stand comprises a telescopic mechanism, a first ladder part and a second ladder part; the first end of telescopic machanism is connected first ladder portion, telescopic machanism's second end is connected second ladder portion, telescopic machanism's flexible can drive second ladder portion is relative first ladder portion moves, in order to change first ladder portion with the total length of second ladder portion. The utility model provides a telescopic cat ladder simple structure compares in traditional convertible cat ladder occupation space little, and through the flexible transform of telescopic cat ladder, can not hinder the gyration of spiller, and has advantages such as the transportation of being convenient for.

Description

Telescopic ladder and land leveler

Technical Field

The utility model relates to an engineering machine tool equipment technical field particularly, relates to a telescopic cat ladder and leveler.

Background

The land leveler is an important road construction equipment, and in order to ensure that the visual field of an operator is wide during construction, a cab is usually installed at a high position, the operator can enter the cab only by means of a ladder, and the ladder is installed at the side part of the cab and extends from a cab door to be close to the ground.

However, since the ladder mounted under the cab door inevitably comes within the turning radius of the blade due to the structural characteristics of the grader, the blade easily hits the ladder of the cab if the operator is technically unskilled during the site construction. In addition, when the container of the whole machine is transported, the number of shipping accessories is large, the grader is driven into the container after materials are placed in the container according to drawings, and the lower end of the crawling ladder is close to the ground, so that the material box on the ground is easily touched when the container is driven into the whole machine, and the materials are damaged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a telescopic cat ladder and leveler to solve current cat ladder for the land leveler to a certain extent and probably hit by the spiller and break down and the technical problem who gets into the fragile material in the container.

The telescopic ladder stand is used for a land leveler and comprises a telescopic mechanism, a first ladder part and a second ladder part;

the first end of telescopic machanism is connected first ladder portion, telescopic machanism's second end is connected second ladder portion, telescopic machanism's flexible can drive second ladder portion is relative first ladder portion moves, in order to change first ladder portion with the total length of second ladder portion.

In the above technical solution, preferably, the telescopic ladder stand further includes a ladder seat;

one end of the first ladder part is detachably connected with the ladder seat;

the ladder seat is provided with at least one mounting seat parallel to a surface to be mounted of the ladder, and the mounting seat is provided with a mounting hole;

the bottom of ladder seat is provided with articulated seat, telescopic machanism's first end with articulated seat is articulated.

In any of the above technical solutions, preferably, the first step portion and the second step portion are slidably connected;

the first ladder portion comprises at least one first ladder frame extending along a first direction, and the second ladder portion comprises at least one second ladder frame extending along the first direction and a second supporting beam vertically connected with the second ladder frame;

a sliding groove extending along the first direction is formed on the first ladder frame, and a sliding rail is formed on the second ladder frame; or, a slide rail extending along the first direction is formed on the first ladder frame, and a sliding groove is formed on the second ladder frame;

the slide rail can slide in the slide groove, so that the second ladder frame and the second support beam can slide relative to the first ladder frame along the first direction.

In any one of the above technical solutions, preferably, the first ladder portion further includes a first support beam vertically connected to the first ladder frame, and the first support beam and the second support beam are arranged in a staggered manner.

In any one of the above technical solutions, preferably, a connection seat is disposed on one side of the second ladder portion facing the ladder to-be-installed surface, and the second end of the telescopic mechanism is rotatably connected to the connection seat.

In any one of the above technical solutions, preferably, a positioning seat and an abutting member are provided on a side of the first ladder portion facing the surface to be installed for climbing a ladder, and the first end of the telescopic mechanism can penetrate through the positioning seat and abut against the abutting member.

In any one of the above technical solutions, preferably, a limiting member is further disposed on a side portion of the first step portion and a side portion of the second step portion; when the second ladder portion extends to a preset position relative to the first ladder portion, the second ladder portion can be abutted against the limiting member.

In any of the above technical solutions, preferably, the telescopic mechanism is a hydraulic cylinder, an air cylinder, or a telescopic link.

The application also provides a grader, including any one of above-mentioned telescopic cat ladder.

Compared with the prior art, the beneficial effects of the utility model are that:

the application provides a telescopic cat ladder is applicable to engineering machine tool vehicle, is particularly useful for the leveler, and the leveler that has this telescopic cat ladder can make the second ladder portion of cat ladder shrink for first ladder portion when the spiller gyration or place the leveler in the container, and the total length of first ladder portion and second ladder portion shortens, consequently can not produce the gyration of spiller and disturb or collide other material casees in the container. And when needs use the cat ladder, can make second ladder portion extend for first ladder portion, the total length of first ladder portion and second ladder portion is elongated, can regard as normal cat ladder to use, simple structure compares in traditional convertible cat ladder occupation space little, and through the flexible transform of telescopic cat ladder, can not hinder the gyration of spiller, and has advantages such as the transportation of being convenient for.

The application provides a grader, including foretell telescopic cat ladder, consequently also have telescopic cat ladder the simple operation, guarantee the normal of spiller revolve round and can not produce the beneficial effect of damage to other structures when being arranged in the container.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a first structure of a retractable ladder stand provided in an embodiment of the present application at a first viewing angle;

fig. 2 is a schematic structural view of a first structure of the telescopic ladder stand provided by the embodiment of the application at a second view angle;

fig. 3 is a schematic structural view of a second structure of the retractable ladder stand provided by the embodiment of the application at a first view angle;

fig. 4 is a schematic structural view of a third structure of the retractable ladder stand provided by the embodiment of the application at a first view angle;

fig. 5 is a schematic structural view of a third structure of the retractable ladder stand provided by the embodiment of the application at a second view angle;

fig. 6 is a schematic structural diagram of a fourth structure of the retractable ladder stand provided by the embodiment of the application at a first viewing angle.

Reference numerals:

1-a first ladder part, 11-a first ladder frame, 111-a sliding chute, 12-a first supporting beam, 13-a positioning seat, 14-an abutting part, 2-a second ladder part, 21-a second ladder frame, 211-a sliding rail, 22-a second supporting beam, 23-a connecting seat, 3-a telescopic mechanism, 4-a ladder seat, 41-a mounting seat, 411-a mounting hole, 42-a hinging seat, 5-a limiting part and 51-a limiting bulge.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.

Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly over" or "directly overlying" another element, there may be no intervening elements present.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section referred to in the examples described herein may be termed a second element, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

A telescoping ladder and grader according to some embodiments of the present invention is described below with reference to fig. 1-6.

Example one

Referring to fig. 1 to 6, the present embodiment provides a telescopic ladder stand, which includes a ladder seat 4, a telescopic mechanism 3, a first ladder portion 1 and a second ladder portion 2, wherein one end of the first ladder portion 1 is connected to the ladder seat 4, and the other end of the first ladder portion 1 is slidably connected to the second ladder portion 2; ladder seat 4 is connected to telescopic machanism 3's first end, and second ladder portion 2 is connected to telescopic machanism 3's second end, and telescopic machanism 3's flexible can drive second ladder portion 2 for first ladder portion 1 motion to change the total length of first ladder portion 1 and second ladder portion 2. Wherein, the first end of the telescopic mechanism 3 can be a fixed end or a telescopic end, and the second end of the corresponding telescopic mechanism 3 is a telescopic end or a fixed end. The present embodiment specifically describes the structure and the working principle of the retractable ladder stand of the present embodiment by taking the first end of the retractable mechanism 3 as a fixed end and the second end as a retractable end.

The telescopic ladder stand of this embodiment is applicable to engineering machinery vehicle, is particularly useful for the leveler, and the leveler that has the telescopic ladder stand of this embodiment can make the second ladder portion 2 of ladder stand shrink for first ladder portion 1 when the spiller gyration or place the leveler in the container, and the total length of first ladder portion 1 and second ladder portion 2 shortens, consequently can not produce the interference or other material casees of collision in the container to the gyration of spiller. When the ladder is needed, the second ladder part 2 can be extended relative to the first ladder part 1, and the total length of the first ladder part 1 and the second ladder part 2 is increased, so that the ladder can be used as a normal ladder.

The telescopic cat ladder of this embodiment simple structure, and it is little to compare in traditional convertible cat ladder occupation space, and through the flexible transform of telescopic cat ladder, can not hinder the gyration of spiller, and has advantages such as the transportation of being convenient for.

Specifically, as shown in fig. 1, the ladder seat 4 is formed with at least one mounting seat 41, a mounting surface of the mounting seat 41 is parallel to a mounting surface to be mounted on the ladder (for example, a side surface of a grader, which will be described below as the mounting surface to be mounted), a mounting hole 411 is formed in the mounting seat 41, and the ladder seat 4 can be mounted on the side surface of the grader by inserting a connecting member into the mounting hole 411. The bottom of the ladder seat 4 is provided with a hinge seat 42 to facilitate connection with the telescopic mechanism 3. The number of mounting seats 41 on the ladder seat 4 may be one, two or three, etc., preferably two.

One end of the first ladder portion 1 is detachably connected with the seat body of the ladder seat 4, so that the first ladder portion 1 can be conveniently assembled or overhauled. In the use state shown in fig. 1 to 6, the first ladder portion 1 and the second ladder portion 2 both extend in the vertical direction, so the first ladder portion 1 may also be referred to as an ascending ladder and the second ladder portion 2 may also be referred to as a descending ladder. The first ladder portion 1 comprises at least one first ladder frame 11 extending along the vertical direction, and a sliding groove 111 extending along the vertical direction is formed on the first ladder frame 11; the second ladder portion 2 includes at least one second ladder frame 21 extending in the vertical direction, and the second ladder frame 21 is formed with a slide rail 211 extending in the vertical direction, and the slide rail 211 is slidable along the slide groove 111, thereby changing the position of the second ladder frame 21 with respect to the first ladder frame 11. And the second ladder frame 21 further comprises a second support beam 22 arranged perpendicular to the second ladder frame 21, the second support beam 22 serves as a foot beam of the ladder to realize a bearing function, and the second support beam 22 also moves along with the second ladder frame 21 along with the movement of the second ladder frame 21 relative to the first ladder frame 11, so that the integral extension and retraction of the ladder are realized. The number of the second support beams 22 may be one, two or more, and when the number of the second support beams 22 is plural, the plural second support beams 22 are arranged in parallel at intervals.

Specifically, referring to fig. 1, the first ladder portion 1 includes two first ladder frames 11 arranged in parallel, and sliding grooves 111 are provided on facing inner walls of the two first ladder frames 11. Second ladder portion 2 includes two parallel arrangement's second ladder frame 21 and second supporting beam 22, and second supporting beam 22 is connected between two second ladder frames 21, is provided with slide rail 211 on the outer wall that backs on the back of the body of two second ladder frames 21, and slide rail 211 can slide in corresponding spout 111 to make the relative slip between first ladder portion 1 and the second ladder portion 2 more steady, and the structural strength of whole cat ladder is higher, it is better to bear stability.

It should be noted that, for the sliding connection between the first ladder frame 11 and the second ladder frame 21, a sliding manner in which a sliding rail is disposed on the first ladder frame 11, a sliding groove is disposed on the second ladder frame 21, or other sliding connection manners commonly used in the art may also be adopted, which is not illustrated here.

Further, as shown in fig. 3, in order to improve the structural strength of the first ladder portion 1, a first support beam 12 may be further provided between the two first ladder frames 11 of the first ladder portion 1, the first support beam 12 being vertically connected between the two first ladder frames 11. And for avoiding second ladder portion 2 to lie in the in-process of first ladder portion 1 relative slip, first supporting beam 12 produces the hindrance to the motion of second supporting beam 22, it sets up first supporting beam 12 and second supporting beam 22 for the dislocation set to use the cat ladder to be close to the one side of the lateral part of leveler as the inboard, the cat ladder deviates from lateral part one side of leveler for the outside, first supporting beam 12 sets up in the inboard, second supporting beam 22 sets up in the outside, thereby realize the dislocation set of first supporting beam 12 and second supporting beam 22.

As shown in fig. 1 to 6, the extension and contraction mechanism 3 is used for driving the second ladder section 2 to perform extension and contraction movement relative to the first ladder section 1, and in order not to obstruct the normal use of the ladder, the extension and contraction mechanism 3 is provided on the side of the first ladder section 1 and the second ladder section 2 facing the grader, that is, on the inner side of the ladder. The stiff end of telescopic machanism 3 is articulated with the articulated seat 42 of the bottom of ladder seat 4, and telescopic machanism 3's flexible end is connected with second ladder portion 2 to when telescopic machanism 3's flexible end extends, can drive second ladder portion 2 and extend downwards relative first ladder portion 1, make the whole length of cat ladder become elongated, until the tip of second ladder portion 2 contacts to ground, staff's accessible cat ladder gets into in the driver's cabin of leveler. When the flexible end of telescopic machanism 3 contracts, can drive second ladder portion 2 and upwards contract relative first ladder portion 1 for the whole length of cat ladder shortens, when the bottom of second ladder portion 2 contracts to preset position, does not influence the gyration of the spiller of leveler this moment, also can not produce the loss to other structures in the container is arranged in to the leveler in this moment, and occupation space is little, and it is more simple and convenient to operate.

Specifically, the telescopic mechanism 3 may be a hydraulic cylinder, an air cylinder, or a telescopic member such as a telescopic link. Referring to fig. 1 and 2, when the telescopic mechanism 3 is a hydraulic cylinder or a pneumatic cylinder, the cylinder body thereof is hinged to the hinge seat 42 of the ladder section 4, and the rod end of the piston rod is hinged to the second support beam 22 at the bottommost portion of the second ladder section 2, so that the second ladder section 2 is driven to be telescopic by the telescopic motion of the piston rod. Preferably, the second support beam 22 at the bottommost of the second ladder section 2 is provided with a connecting seat 23 on the side facing the grader, and the end of the piston rod is hinged with the connecting seat 23. It should be noted that, the telescopic end and the fixed end of the telescopic mechanism 3 and the corresponding hinge seat 42 and the connecting seat 23 may also be fixedly connected, but when the fixed connection is adopted, it is necessary to ensure that the extending direction of the telescopic end of the telescopic mechanism 3 is absolutely parallel to the extending direction of the sliding groove 111 and the sliding rail 211, so as to ensure the normal extension of the second ladder section 2. Compared with fixed connection, the embodiment preferably adopts a hinged connection mode between the telescopic end and the fixed end of the telescopic mechanism 3 and the corresponding hinged seat 42 and the connecting seat 23, so that the driving action of the telescopic mechanism 3 is more reliable, the requirement on equipment error is low, and the use stability of the ladder stand is ensured.

In addition, referring to fig. 2, in order to provide a certain supporting and limiting effect on the cylinder body of the telescopic mechanism 3, in the embodiment, a positioning seat 13 and an abutting piece 14 are arranged on one side of the first ladder part 1 facing the side of the grader, a positioning hole is formed in the positioning seat 13, the cylinder body of the telescopic mechanism 3 can pass through the positioning hole in the positioning seat 13, and the abutting piece 14 can extend into the positioning hole and abut against the cylinder body, so that the cylinder body is fixed. The abutting part 14 may be a screw, a screw hole penetrating through the positioning hole is formed on the positioning seat 13, and the screw can be screwed into or out of the positioning hole through the screw hole, so that the abutting part and the cylinder body can be abutted or separated.

In addition, referring to fig. 4 to 6, in order to improve the stability when the second ladder portion 2 extends to a predetermined position relative to the first ladder portion 1 (i.e. when the second ladder portion 2 extends to one end thereof and the operator can climb up), especially when the telescopic mechanism 3 is an air cylinder, so that the second ladder portion 2 can provide a stable bearing capacity, the limiting members 5 are disposed at the side portions of the first ladder portion 1 and the second ladder portion 2, and when the second ladder portion 2 extends to a predetermined position relative to the first ladder portion 1, the second supporting beams 22 of the second ladder portion 2 can abut against the limiting members 5.

Specifically, one end of the limiting member 5 may be fixedly disposed on a fixed end of the telescopic mechanism 3 (as shown in fig. 4 and 5, one end of the limiting member 5 is fixedly connected to the cylinder body when the telescopic mechanism 3 is a hydraulic cylinder or an air cylinder) or the first supporting beam 12 of the first ladder portion 1 (as shown in fig. 6), and the other end of the limiting member 5 extends to a position below the second supporting beam 22 of the second ladder portion 2, so that when the second ladder portion 2 extends to a predetermined position relative to the first ladder portion, the lower portion of the second supporting beam 22 can abut against the limiting member 5. The limiting member 5 may be a limiting plate including a plurality of limiting protrusions 51 arranged at intervals, and the plurality of limiting protrusions 51 may abut against the lower portion of the second supporting beam 22.

When the telescopic ladder of the embodiment is used, the second ladder part 2 is pushed downwards through the telescopic mechanism 3 to be extended to a first preset position or until the lower part of the second supporting beam 22 of the second ladder part 2 is abutted to the positioning piece, and at the moment, a worker can step on the second supporting beam 22 to climb. After the telescopic ladder stand is used, the telescopic mechanism 3 retracts, the second ladder part 2 is pulled to retract to a second preset position relative to the first ladder part 1, and the telescopic ladder stand retracts.

Example two

The telescopic ladder stand of the present embodiment is an improvement of the telescopic ladder stand of the first embodiment, and therefore, the disclosure of the above embodiments also belongs to the disclosure of the present embodiment.

In addition, the telescopic ladder stand of the embodiment comprises a control element which is in communication connection with the telescopic mechanism and a cab door control system respectively, namely, the linkage between the ladder stand and the cab is realized. When the cab control system controls the cab door to be opened, which means that a worker enters the cab or comes out of the cab through the ladder stand, the cab door control system sends an extension command to the control element, the control element sends an extension signal to the telescopic mechanism, and the telescopic mechanism of the ladder stand extends, so that the ladder stand extends. When the cab control system controls the cab door to be closed, which means that a worker has entered the cab through the ladder stand or has finished coming out of the cab, the cab door control system sends a retraction command to the control element, the control element sends a retraction signal to the telescoping mechanism, and the telescoping mechanism of the ladder stand retracts, so that the ladder stand retracts.

EXAMPLE III

The telescopic ladder stand of the present embodiment is the telescopic ladder stand of the first embodiment, and the relative extension of the first ladder section and the second ladder section is realized by manually driving the fitting positioning piece in addition to the telescopic mechanism.

The embodiment provides a positioning element, a first ladder part and a second ladder part which are connected in a sliding manner, wherein the positioning element is fixedly arranged on one side of the first ladder part and one side of the second ladder part, the first ladder part is used for being connected with a surface to be installed (such as the side surface of a grader), and the second ladder part can extend relative to the first ladder part; when the second ladder part extends to a preset position relative to the first ladder part, the second ladder part can be abutted to the positioning piece.

Specifically, one end of the positioning element can be fixedly arranged on the surface to be installed, and the other end of the positioning element extends to the lower portion of the second supporting beam of the second ladder portion, so that when the second ladder portion extends to a preset position relative to the first ladder portion, the lower portion of the second supporting beam can abut against the positioning element. The positioning piece can be a limiting plate comprising a plurality of limiting bulges arranged at intervals, and the plurality of limiting bulges can be abutted against the lower part of the second supporting beam.

When the telescopic ladder stand is used, the second ladder part is pulled downwards manually to be extended to the lower part of the second supporting beam of the second ladder part to be abutted to the positioning piece, and at the moment, a worker can step on the second supporting beam to climb. After the telescopic ladder stand is used, a worker can pull the second ladder part to retract relative to the first ladder part through structures such as manual operation or lifting ropes, and the retraction of the telescopic ladder stand is achieved.

Example four

The embodiment provides a grader, including the telescopic cat ladder of above-mentioned embodiment, consequently also have the simple operation of telescopic cat ladder, guarantee the normal convolution of spiller and can not produce the beneficial effect of damage to other structures when being arranged in the container.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A telescopic ladder stand is used for a land leveler and is characterized by comprising a telescopic mechanism, a first ladder part and a second ladder part;

2. The telescopic ladder of claim 1, further comprising a ladder seat;

one end of the first ladder part is detachably connected with the ladder seat;

3. The telescopic ladder of claim 1, wherein the first ladder section and the second ladder section are slidably connected;

4. The telescopic ladder of claim 3, wherein the first ladder section further comprises a first support beam perpendicularly connected to the first ladder frame, the first support beam and the second support beam being offset from one another.

5. The telescopic ladder stand as claimed in claim 3, wherein a connecting seat is provided on the side of the second ladder portion facing the surface on which the ladder stand is to be mounted, and the second end of the telescopic mechanism is rotatably connected to the connecting seat.

6. The telescopic ladder of claim 3, wherein the side of the first ladder portion facing the ladder to be mounted is provided with a locating seat and an abutment, the first end of the telescopic mechanism being capable of passing through the locating seat and abutting the abutment.

7. The telescopic ladder of claim 1, wherein the sides of the first and second ladder portions are further provided with stops; when the second ladder portion extends to a preset position relative to the first ladder portion, the second ladder portion can be abutted against the limiting member.

8. A telescopic ladder according to any of claims 1-7, characterized in that the telescopic mechanism is a hydraulic cylinder, a pneumatic cylinder or a telescopic link.

9. A grader comprising a telescopic ladder according to any of claims 1 to 8.