CN215632707U - Cat ladder assembly and milling machine - Google Patents

Abstract

The utility model provides a ladder assembly and a milling machine, wherein the ladder assembly comprises: the ladder frame is connected with the frame; the fixed pedal is arranged on the ladder frame; flexible cat ladder subassembly includes: the movable frame is connected with the stair climbing frame in a sliding manner; the movable pedal is arranged on the movable frame; the movable frame slides to a first position, and the distance between the movable pedal and the fixed pedal is a first distance; the movable frame slides to a second position, the distance between the movable pedal and the fixed pedal is a second distance, and the second distance is larger than the first distance. According to the technical scheme, the flexible ladder assembly is additionally arranged, so that the movable pedal can be retracted and expanded to meet the requirements of different operation scenes. When the milling machine carries out transition operation, the movable frame is slid to the second position, the length of the ladder assembly is increased, and workers can conveniently go up and down an operation area; when the milling machine carries out the maximum degree of depth and mills the plane, slide the adjustable shelf to primary importance, shorten the length of cat ladder assembly, greatly reduced with the ground possibility of colliding with.

Description

Cat ladder assembly and milling machine

Technical Field

The embodiment of the utility model relates to the technical field of milling machines, in particular to a ladder stand assembly and a milling machine.

Background

When a small milling machine (with milling width below 1 m) is used for construction, the supporting legs need to be lifted to the highest point, the ground clearance of the supporting legs is high at the moment, and the fixed ladder stand is inconvenient to lift up and down. In addition, when the milling machine mills the milling machine with the maximum depth, the ground clearance of the existing fixed ladder stand is only 200 mm.

In the milling machine in the related art, a fixed ladder stand is adopted, and under the condition that pedals are not added, when the milling machine is in a transition construction, the supporting legs rise to the maximum height, the height of the ladder stand above the ground is large, and personnel are inconvenient to go up and down; if a section of pedal is added, the ladder may collide with the ground when the milling machine performs milling at the maximum depth.

SUMMERY OF THE UTILITY MODEL

In order to solve or improve at least one of the above technical problems, an object of an embodiment of the present invention is to provide a ladder assembly.

Another object of an embodiment of the present invention is to provide a milling machine having the above ladder assembly.

To achieve the above object, an embodiment of a first aspect of the present invention provides a ladder assembly comprising: the ladder frame is used for being connected with the frame; the fixed pedal is arranged on the ladder frame; flexible cat ladder subassembly includes: the movable frame is connected with the stair climbing frame in a sliding manner; the movable pedal is arranged on the movable frame; the movable frame slides to a first position, the movable pedal is abutted against the fixed pedal, or the distance between the movable pedal and the fixed pedal is a first distance, and the movable frame and the ladder stand are relatively fixed through a limiting structure; the movable frame slides to a second position, the distance between the movable pedal and the fixed pedal is a second distance, and the second distance is larger than the first distance.

According to the embodiment of the ladder stand assembly provided by the utility model, the telescopic ladder stand component is additionally arranged in the ladder stand assembly, and the movable pedal can be adjusted up and down, so that the movable pedal can be retracted and expanded to meet the requirements of different operation scenes. The ladder stand assembly can be suitable for various engineering machines such as a milling machine and the like, when the milling machine carries out transition operation, the supporting legs of the milling machine generally need to be lifted to the highest point, the height of the supporting legs from the ground is higher, and at the moment, the movable frame in the telescopic ladder stand assembly can be slid to the second position, so that the overall length of the ladder stand assembly is increased, and workers can conveniently go up and down an operation area; when the milling machine carries out the maximum degree of depth and mills and plane, slide the adjustable shelf in the flexible cat ladder subassembly to the primary importance, make the overall length of cat ladder assembly be in the shortest state, greatly reduced cat ladder assembly and ground take place the possibility of colliding with to play the effect of protection to the cat ladder assembly to a certain extent.

Particularly, the cat ladder assembly includes the cat ladder frame, fixed footboard and flexible cat ladder subassembly. The ladder frame is connected with a frame of the milling machine and mainly plays a role in mounting a carrier in the ladder assembly. The fixed footboard is located the ladder frame, and the quantity of fixed footboard is at least one, and fixed footboard can be one, two or a plurality of promptly, considers occupation space size, cost and other factors, carries out nimble setting to fixed footboard according to actual demand.

It is worth mentioning that the connection mode between the ladder stand and the frame can be welding, and the detachable connection can also be realized through bolts or other modes. The connection mode between the fixed pedal and the ladder stand can be welding, and the detachable connection can also be realized through bolts or other modes.

Further, the telescopic ladder stand component comprises a movable frame and a movable pedal. The adjustable shelf sliding connection is in the cat ladder frame, and the adjustable shelf in the flexible cat ladder subassembly can slide relatively the cat ladder frame promptly. The movable pedal is arranged on the movable frame, the number of the movable pedals is at least one, namely one, two or more movable pedals are arranged, and the movable pedals are flexibly arranged according to actual requirements in consideration of the size of occupied space, cost and other factors.

Further, when the adjustable shelf slides to the first position, the movable pedal props against the fixed pedal at the moment, so that the telescopic ladder stand component in the first position state is in a withdrawing state, the movable pedal props against the fixed pedal, the overall length of the ladder stand assembly can be reduced to a great extent, and the movable pedal can be hidden. Or when the movable frame is at the first position, the movable pedal is not in contact with the fixed pedal, and the distance between the movable pedal and the fixed pedal is the first distance. Furthermore, the movable frame and the ladder stand are relatively fixed through a limiting structure so as to ensure that the telescopic ladder stand component in the first position state is in a retracting state.

When the movable frame is at the second position, the distance between the movable pedal and the fixed pedal is a second distance, and the second distance is larger than the first distance. It can be understood that the telescopic ladder stand component in the second position state is in the expansion state, and the length of the ladder stand assembly is larger than that of the ladder stand assembly in the retraction state.

When the milling machine (the milling width is less than 1 m) in the related art is used for construction, the supporting legs need to be lifted to the highest point, the height of the supporting legs above the ground is high, and the traditional fixed ladder stand is inconvenient to lift up and down. In addition, when the milling machine mills the maximum depth, the ground clearance of the traditional fixed ladder stand is only 200 mm.

In the technical scheme that this application was injectd, through add flexible cat ladder subassembly in the cat ladder assembly, and the activity footboard can be adjusted from top to bottom to the activity footboard can be withdrawed and expand, with the demand that satisfies different operation scenes.

Specifically, when the milling machine carries out transition operation, the supporting legs of the milling machine generally need to be lifted to the highest point, the height of the supporting legs from the ground is high, at the moment, the movable frame in the telescopic ladder stand component can be slid to the second position, the overall length of the ladder stand assembly is increased, and workers can conveniently go up and down an operation area;

when the milling machine carries out the maximum degree of depth and mills and plane, slide the adjustable shelf in the flexible cat ladder subassembly to the primary importance, make the overall length of cat ladder assembly be in the shortest state, greatly reduced cat ladder assembly and ground take place the possibility of colliding with to play the effect of protection to the cat ladder assembly to a certain extent.

In addition, the technical scheme provided by the utility model can also have the following additional technical characteristics:

in the technical scheme, the ladder stand is provided with a sliding chute, the movable frame is provided with a guide post, the guide post is a cylinder and extends into the sliding chute, the guide post and the sliding chute are matched with each other to realize the relative sliding of the movable frame and the ladder stand, and the guide post is fixedly connected to the movable frame; or the guide post is rotationally connected with the movable frame.

In this technical scheme, through set up the spout on the ladder frame, set up the guide post on the adjustable shelf, the guide post can stretch into to the spout, and the guide post mutually supports with the spout to realize the relative slip of adjustable shelf and ladder frame, the adjustable shelf can slide relatively the ladder frame promptly. Further, the guide post is a cylinder. Through setting up the guide post into the cylinder, and the guide post can slide in the spout, greatly reduced the movable rack in the gliding in-process of relative cat ladder frame take place the possibility of jamming. In addition, the surface of the guide post is coated with a wear-resistant material so as to improve the wear-resistant performance of the guide post and further improve the service life of the guide post.

It is worth to be noted that the guide post and the movable frame may be fixedly connected or rotatably connected. When the guide post is fixedly connected with the movable frame, the guide post and the movable frame are relatively fixed, and the guide post can slide relative to the sliding groove so as to realize the sliding connection of the movable frame and the ladder stand; when the guide post rotates to be connected in the adjustable shelf, the guide post can rotate relative to the adjustable shelf, and the guide post removes with the relative spout of the mode of roll antedisplacement, and this kind of design mode is for guide post and adjustable shelf relatively fixed's mode, and rolling friction replaces sliding friction, is favorable to reducing the frictional resistance between guide post and the spout, further reduces the risk that the slip in-process takes place the jamming.

In the above technical solution, the chute includes: a lifting part; the length direction of the translation part is vertical to that of the lifting part; the length direction of the locking part is consistent with that of the lifting part, one end of the translation part is communicated with the lifting part, the other end of the translation part is communicated with the locking part, the movable frame is located at the second position, and the guide column is located at one end, close to the movable pedal, of the lifting part; the movable frame slides to the first position from the second position, and the guide post passes through the lifting part, the translation part and the locking part in sequence.

In this technical solution, the chute includes a lifting portion, a translation portion, and a locking portion. Specifically, one end of the translation portion communicates with the lifting portion, and the other end of the translation portion communicates with the lock portion. Further, the longitudinal direction of the translation portion is perpendicular to the longitudinal direction of the lifting portion, the longitudinal direction of the locking portion is coincident with the longitudinal direction of the lifting portion, and the length of the locking portion is smaller than the length of the lifting portion. In other words, the chute composed of the elevating portion, the translating portion, and the locking portion is approximately "7" shaped. When the movable frame is at the second position, the guide column is positioned at one end of the lifting part close to the movable pedal, and the guide column is positioned at one end of the lifting part far away from the translation part, namely the guide column is positioned at the bottom of the lifting part; in the process that the movable frame slides from the second position to the first position, the guide columns on the movable frame sequentially pass through the lifting part, the translation part and the locking part. When the movable frame is located at the first position, the guide column is located in the locking part, and the limiting structure can limit the movable frame at the moment, so that the telescopic ladder assembly is in a retracting state.

In the technical scheme, the number of the sliding grooves is two, the number of the guide columns is two, and each guide column is in sliding connection with one corresponding sliding groove.

In this technical scheme, through setting up the quantity with the spout to two, two spout parallel arrangement, the quantity of guide post is unanimous with the quantity of spout, and the quantity of guide post is also two promptly to every guide post homoenergetic can be with a corresponding spout sliding connection, is favorable to improving the movable frame and carries out gliding stationarity at relative cat ladder frame.

In the above technical scheme, limit structure includes: a first part arranged on the movable frame; the second portion is arranged on the ladder stand, the movable frame slides to the first position, and the first portion can stretch into the second portion so that the movable frame and the ladder stand are relatively fixed.

In this technical scheme, limit structure includes first portion and second portion. Specifically, the first part is arranged on the movable frame, and the second part is arranged on the ladder frame. When the adjustable shelf slides to the first position, the first part on the adjustable shelf can stretch into the second part on the crawling ladder frame to limit the adjustable shelf, at the moment, the adjustable shelf and the crawling ladder frame are relatively fixed, and the telescopic crawling ladder assembly is in a retracting state.

In the above technical solution, the first part is a buckle, and the second part is a lock ring.

In the technical scheme, the hasp is arranged on the first part, the lock ring is arranged on the second part, when the movable frame slides to the first position, the hasp can extend into the lock ring, and the movable frame and the ladder stand are relatively fixed; when the telescopic ladder stand component needs to be in an unfolding state, the hasp is pulled to be separated from the lock ring, the movable frame can slide under the action of self gravity until the movable frame is in a second position, and the distance between the movable pedal and the fixed pedal is a second distance.

In the technical scheme, a first lightening hole is formed in the fixed pedal, a first bulge is arranged on one side, away from the movable pedal, of the fixed pedal, and the first bulge is arranged around the first lightening hole; and/or a second lightening hole is formed in the movable pedal, a second protrusion is arranged on one side, close to the fixed pedal, of the movable pedal, and the second protrusion is arranged around the second lightening hole.

In the technical scheme, the first lightening holes are formed in the fixed pedal, so that on one hand, the effects of lightening weight, saving materials and reducing cost can be achieved; on the other hand, water accumulation on the surface of the fixed pedal can be avoided, and water flow can fall down from the lightening holes.

Furthermore, a first bulge is arranged on one side, far away from the movable pedal, of the fixed pedal, and the first bulge is arranged around the first lightening hole. Through setting up first arch, can play skid-proof effect, greatly reduced the staff and stepped on the possibility that falls on fixed footboard. The first protrusions may be saw-toothed or have other shapes.

Furthermore, the movable pedal is provided with a second lightening hole, so that on one hand, the effects of lightening, saving materials and reducing cost can be achieved; on the other hand, water accumulation on the surface of the movable pedal can be avoided, and water flow can fall down from the lightening holes.

Furthermore, a second bulge is arranged on one side, close to the fixed pedal, of the movable pedal, and the second bulge is arranged around the second lightening hole. Through setting up the second arch, can play skid-proof effect, greatly reduced the staff and stepped on the possibility that falls on movable footboard. The second protrusions may be saw-toothed or have other shapes.

It is worth to be noted that the first lightening hole and the first protrusion may be provided only on the fixed pedal; or, only the second lightening hole and the second bulge are arranged on the movable pedal.

In the above technical solution, the method further comprises: one end of the handrail is connected with the ladder stand, and the other end of the handrail is used for being connected with the frame.

In this technical scheme, the cat ladder assembly still includes the handrail. Specifically, one end of the handrail is connected with the ladder stand, and the other end of the handrail is connected with the frame. Through setting up the handrail, can protect the side of cat ladder assembly, the handrail can be pulled to the operating area time about the staff, greatly reduced the possibility that the staff falls.

It is worth mentioning that the handrail is detachably connected with the ladder stand, and the handrail is also detachably connected with the frame, so that the handrail is convenient for workers to maintain or replace.

In the above technical solution, the method further comprises: the handle is rotatably arranged on the movable frame and is M-shaped.

In this technical scheme, cat ladder assembly still includes the handle. Specifically, the adjustable shelf is rotationally located to the handle, and the handle can rotate relative to the adjustable shelf promptly, when the staff need withdraw or expand flexible cat ladder subassembly, can hold the handle and control the adjustable shelf and slide from top to bottom, gliding in-process about the adjustable shelf, the wrist need not rotate, and the handle can rotate along with the lift of adjustable shelf for the staff can control the adjustable shelf more conveniently. Furthermore, the handle is M-shaped, so that a worker can hold the handle more comfortably, and the design mode is more in line with human engineering.

Embodiments of a second aspect of the present disclosure provide a milling machine, comprising: a frame; in the ladder stand assembly in any one of the above embodiments, the ladder stand frame of the ladder stand assembly is connected with the frame, and the ladder stand assembly comprises handrails connected with the frame.

According to an embodiment of the milling machine of the present disclosure, the milling machine includes a frame and a ladder assembly. Specifically, the ladder stand of the ladder stand assembly is connected with the frame. It is worth mentioning that the connection mode between the ladder stand and the frame can be welding, and the detachable connection can also be realized through bolts or other modes.

Furthermore, the ladder stand assembly also comprises handrails, one ends of the handrails are connected with the ladder stand frame, and the other ends of the handrails are connected with the frame. Through setting up the handrail, can protect the side of cat ladder assembly, the handrail can be pulled to the operating area time about the staff, greatly reduced the possibility that the staff falls.

Wherein, because milling machine includes any cat ladder assembly in above-mentioned first aspect, so have the beneficial effect of any above-mentioned embodiment, no longer describe herein.

Additional aspects and advantages of embodiments of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 shows a first schematic view of a ladder assembly according to one embodiment of the utility model;

figure 2 shows a schematic view of a telescopic ladder assembly according to one embodiment of the utility model;

FIG. 3 illustrates a second schematic view of a ladder assembly in accordance with one embodiment of the utility model;

FIG. 4 shows a third schematic view of a ladder assembly in accordance with an embodiment of the utility model;

FIG. 5 illustrates a fourth schematic view of a ladder assembly in accordance with one embodiment of the utility model;

FIG. 6 shows a schematic view of a chute according to one embodiment of the utility model;

fig. 7 shows a schematic view of a milling machine according to an embodiment of the utility model;

FIG. 8 shows a schematic view of a fixed pedal according to one embodiment of the present invention;

FIG. 9 shows a schematic view of an active step according to one embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 9 is:

100: a ladder assembly; 110: a ladder rack; 120: a chute; 121: a lifting part; 122: a translation section; 123: a locking portion; 131: fixing the pedal; 132: a first lightening hole; 133: a first protrusion; 140: a telescopic ladder assembly; 141: a movable frame; 142: a guide post; 143: a movable pedal; 144: a second lightening hole; 145: a second protrusion; 150: a limiting structure; 151: a first part; 152: a second section; 160: a handrail; 170: a handle; 200: milling and planing machine; 210: a vehicle frame.

Detailed Description

In order that the above objects, features and advantages of the embodiments of the present invention can be more clearly understood, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present invention may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

A ladder assembly 100 and a milling machine 200 provided in accordance with some embodiments of the present invention are described below with reference to fig. 1-9.

The ladder assembly 100 of the present invention may be applied to various kinds of construction machines such as a milling machine, and the ladder assembly 100 of the present invention will be described below with reference to the application to a milling machine as an example.

Example one

As shown in fig. 1, 3, 4 and 5, one embodiment of the present invention provides a ladder assembly 100 including a ladder frame 110, fixed steps 131 and a telescoping ladder assembly 140. The ladder stand 110 is connected to the frame 210 of the milling machine 200, and the ladder stand 110 mainly serves as a mounting medium in the ladder assembly 100. The fixed pedals 131 are arranged on the ladder frame 110, the number of the fixed pedals 131 is at least one, namely, the fixed pedals 131 can be one, two or more, and the fixed pedals 131 can be flexibly arranged according to actual requirements in consideration of the size of occupied space, cost and other factors.

It should be noted that the connection between the ladder stand 110 and the frame 210 may be welding, or may be detachable through bolts or other methods. The fixed pedal 131 and the ladder stand 110 may be connected by welding, or may be detachably connected by bolts or other methods.

Further, as shown in fig. 2, the telescopic ladder assembly 140 includes a movable frame 141 and a movable step 143. The movable frame 141 is slidably coupled to the ladder frame 110, i.e., the movable frame 141 of the telescoping ladder assembly 140 is slidable relative to the ladder frame 110. The movable pedal 143 is disposed on the movable frame 141, the number of the movable pedals 143 is at least one, that is, the number of the movable pedals 143 may be one, two or more, and the movable pedals 143 are flexibly configured according to actual requirements in consideration of the size of occupied space, cost and other factors.

Further, when the movable frame 141 slides to the first position, the movable step 143 abuts against the fixed step 131, and it can be understood that the retractable ladder assembly 140 in the first position is in the retracted state, and the movable step 143 abuts against the fixed step 131, so that the overall length of the ladder assembly 100 can be reduced to a great extent, and the movable step 143 can be hidden. Alternatively, when the movable frame 141 is at the first position, the movable pedal 143 is not in contact with the fixed pedal 131, and the distance between the two is the first distance. Further, the movable frame 141 is fixed relative to the ladder frame 110 by a stop structure 150 to ensure that the telescopic ladder assembly 140 in the first position state is in the retracted state.

When the movable frame 141 is at the second position, the distance between the movable pedal 143 and the fixed pedal 131 is a second distance, and the second distance is greater than the first distance. It will be appreciated that the telescopic ladder assembly 140 in the second position is in the extended position, in which case the length of the ladder assembly 100 is greater than the length of the ladder assembly 100 in the retracted position of the telescopic ladder assembly 140.

When the milling machine 200 (the milling width is less than 1 m) in the related art is constructed, the supporting legs need to be lifted to the highest point, the height of the supporting legs above the ground is high, and the traditional fixed ladder stand is inconvenient to lift up and down. In addition, when the milling machine 200 mills the maximum depth, the ground clearance of the conventional fixed ladder stand is only 200 mm.

In the technical scheme limited by the application, through add flexible cat ladder subassembly 140 in cat ladder assembly 100, and activity footboard 143 can be adjusted from top to bottom to activity footboard 143 can be withdrawed and expand, with the demand that satisfies different operation scenes.

Specifically, when the milling machine 200 is used for transition work, the legs of the milling machine 200 generally need to be raised to the highest point, and the height above the ground of the legs is relatively high, so that the movable frame 141 in the retractable ladder assembly 140 can be slid to the second position, thereby increasing the overall length of the ladder assembly 100 and facilitating the operation of the operator.

When the milling machine 200 mills the milling machine at the maximum depth, the movable frame 141 in the retractable ladder assembly 140 is slid to the first position, so that the overall length of the ladder assembly 100 is in the shortest state, the possibility of collision between the ladder assembly 100 and the ground is greatly reduced, and the ladder assembly 100 is protected to a certain extent.

Example two

As shown in fig. 1, 3, 4 and 5, the ascending stair frame 110 is provided with a sliding slot 120, the movable frame 141 is provided with a guiding post 142, the guiding post 142 can be inserted into the sliding slot 120, and the guiding post 142 and the sliding slot 120 are matched with each other to realize the relative sliding of the movable frame 141 and the ascending stair frame 110, that is, the movable frame 141 can slide relative to the ascending stair frame 110. Further, the guiding column 142 is a cylinder. By providing the guiding posts 142 as cylinders and the guiding posts 142 being able to slide in the sliding slots 120, the possibility of jamming of the movable frame 141 during sliding relative to the ladder frame 110 is greatly reduced. In addition, the surface of the guide column 142 is coated with a wear-resistant material to improve the wear-resistant performance thereof, thereby prolonging the service life.

Further, the guide post 142 is rotatably connected to the movable frame 141, that is, the guide post 142 can rotate relative to the movable frame 141, and the guide post 142 moves relative to the sliding groove 120 in a rolling forward movement manner, and in this design manner, as compared to a manner in which the guide post 142 and the movable frame 141 are relatively fixed, rolling friction replaces sliding friction, which is beneficial to reducing friction resistance between the guide post 142 and the sliding groove 120, and further reduces the risk of occurrence of clamping stagnation during the sliding process.

In another embodiment, the guiding column 142 is fixedly connected to the movable frame 141, that is, the guiding column 142 is fixed relative to the movable frame 141, and the guiding column 142 can slide relative to the sliding slot 120 to realize the sliding connection between the movable frame 141 and the ladder frame 110.

Further, as shown in fig. 6, the chute 120 includes a lifting portion 121, a translation portion 122, and a locking portion 123. Specifically, one end of the translation portion 122 communicates with the elevating portion 121, and the other end of the translation portion 122 communicates with the lock portion 123. Further, the longitudinal direction of the translation portion 122 is perpendicular to the longitudinal direction of the lifting portion 121, the longitudinal direction of the lock portion 123 coincides with the longitudinal direction of the lifting portion 121, and the length of the lock portion 123 is smaller than the length of the lifting portion 121. In other words, the chute 120 composed of the ascending and descending portion 121, the translating portion 122, and the locking portion 123 is approximately "7" shaped. When the movable frame 141 is in the second position, the guiding column 142 is located at one end of the lifting part 121 close to the movable pedal 143, and it can be understood that the guiding column 142 is located at one end of the lifting part 121 far from the translation part 122, that is, the guiding column 142 is located at the bottom of the lifting part 121; in the process that the movable frame 141 slides from the second position to the first position, the guide column 142 on the movable frame 141 passes through the elevating portion 121, the translation portion 122, and the locking portion 123 in sequence. When the movable frame 141 is in the first position, the guide column 142 is in the locking part 123, and the limiting structure 150 can limit the movable frame 141, so that the telescopic ladder assembly 140 is in a retracted state.

In another embodiment, the number of the chutes 120 is two, the two chutes 120 are arranged in parallel, and the number of the guide posts 142 is the same as the number of the chutes 120, that is, the number of the guide posts 142 is also two, so that each guide post 142 can be slidably connected with a corresponding chute 120, which is beneficial to improving the sliding stability of the movable frame 141 in the relative ascending frame 110.

EXAMPLE III

As shown in fig. 1, the spacing structure 150 includes a first portion 151 and a second portion 152. Specifically, the first portion 151 is provided to the movable frame 141, and the second portion 152 is provided to the ladder frame 110. When the movable frame 141 slides to the first position, the first portion 151 of the movable frame 141 can extend into the second portion 152 of the ladder stand 110 to limit the movable frame 141, and at this time, the movable frame 141 and the ladder stand 110 are fixed relatively, and the retractable ladder assembly 140 is in a retracted state.

In another embodiment, first portion 151 is a snap and second portion 152 is a locking ring. By providing the first portion 151 with a catch and the second portion 152 with a locking ring, the catch can extend into the locking ring when the movable frame 141 slides to the first position, at which time the movable frame 141 and the ladder frame 110 are relatively fixed; when the telescopic ladder stand assembly 140 needs to be in the unfolding state, the buckle is pulled to be separated from the lock ring or the lock ring is pulled to be separated from the buckle, the movable frame 141 can slide under the action of self gravity until the movable frame 141 is in the second position, and the distance between the movable pedal 143 and the fixed pedal 131 is the second distance.

Example four

As shown in fig. 6, the chute 120 includes an ascending and descending portion 121, a translating portion 122, and a locking portion 123. Specifically, one end of the translation portion 122 communicates with the elevating portion 121, and the other end of the translation portion 122 communicates with the lock portion 123. Further, the longitudinal direction of the translation portion 122 is perpendicular to the longitudinal direction of the lifting portion 121, the longitudinal direction of the lock portion 123 coincides with the longitudinal direction of the lifting portion 121, and the length of the lock portion 123 is smaller than the length of the lifting portion 121. In other words, the chute 120 composed of the ascending and descending portion 121, the translating portion 122, and the locking portion 123 is approximately "7" shaped. When the movable frame 141 is in the second position, the guiding column 142 is located at one end of the lifting part 121 close to the movable pedal 143, and it can be understood that the guiding column 142 is located at one end of the lifting part 121 far from the translation part 122, that is, the guiding column 142 is located at the bottom of the lifting part 121; in the process that the movable frame 141 slides from the second position to the first position, the guide column 142 on the movable frame 141 passes through the elevating portion 121, the translation portion 122, and the locking portion 123 in sequence. When the movable frame 141 is in the first position, the guide column 142 is in the locking part 123, and the limiting structure 150 can limit the movable frame 141, so that the telescopic ladder assembly 140 is in a retracted state.

As shown in fig. 1, the spacing structure 150 includes a first portion 151 and a second portion 152. Specifically, the first portion 151 is provided to the movable frame 141, and the second portion 152 is provided to the ladder frame 110. When the movable frame 141 slides to the first position, the first portion 151 of the movable frame 141 can extend into the second portion 152 of the ladder stand 110 to limit the movable frame 141, and at this time, the movable frame 141 and the ladder stand 110 are fixed relatively, and the retractable ladder assembly 140 is in a retracted state.

Further, the first portion 151 is a snap and the second portion 152 is a locking ring. By providing the first portion 151 with a catch and the second portion 152 with a locking ring, the guide post 142 is in the locking portion 123 of the slide slot 120 when the movable frame 141 is slid to the first position, and the catch can be inserted into the locking ring, with the movable frame 141 and the ladder frame 110 relatively fixed; when the telescopic ladder stand component 140 needs to be in an unfolding state, the buckle is shifted to be separated from the lock ring or the lock ring is shifted to be separated from the buckle, a worker pushes the movable frame 141 to enable the guide column 142 to be separated from the locking part 123 of the sliding groove 120, then the guide column 142 sequentially passes through the translation part 122 and the lifting part 121, when the guide column 142 passes through the lifting part 121, the movable frame 141 can slide under the action of self gravity until the movable frame 141 is located at a second position, and the distance between the movable pedal 143 and the fixed pedal 131 is a second distance.

EXAMPLE five

As shown in fig. 8, the first lightening hole 132 is formed on the fixed pedal 131, so that on one hand, the effects of lightening weight, saving material and reducing cost can be achieved; on the other hand, water accumulation on the surface of the fixed pedal 131 can be avoided, and water flow can fall from the lightening holes.

Further, as shown in fig. 1 and 8, the fixed step 131 is provided with a first protrusion 133 on a side away from the movable step 143, and the first protrusion 133 is disposed around the first lightening hole 132. Through setting up first arch 133, can play skid-proof effect, greatly reduced the staff and stepped on the possibility that falls on fixed footboard 131. The first protrusions 133 may have a saw-tooth shape, or may have other shapes.

Further, as shown in fig. 9, a second lightening hole 144 is formed on the movable pedal 143, so that on one hand, the effects of lightening, saving materials and reducing cost can be achieved; on the other hand, water accumulation on the surface of the movable pedal 143 can be avoided, and water flow can fall from the lightening holes.

Further, as shown in fig. 1 and 9, the movable step 143 is provided with a second protrusion 145 on a side close to the fixed step 131, and the second protrusion 145 is provided around the second lightening hole 144. Through setting up second arch 145, can play skid-proof effect, greatly reduced the staff and stepped on the possibility that falls on movable footboard 143. The second protrusions may be saw-toothed or have other shapes.

In another embodiment, only the first lightening holes 132 and the first protrusions 133 are provided on the fixed pedal 131.

In another embodiment, only the second lightening holes 144 and the second protrusions 145 are provided on the movable step 143.

EXAMPLE six

As shown in fig. 3, 4 and 5, the ladder assembly 100 also includes handrails 160. Specifically, one end of the handrail 160 is connected to the ladder frame 110, and the other end of the handrail 160 is connected to the frame 210. Through setting up handrail 160, can protect the side of cat ladder assembly 100, the staff can pull handrail 160 when going up the operating area, greatly reduced the staff possibility of falling.

It should be noted that the handrail 160 is detachably connected to the ladder frame 110, and the handrail 160 is also detachably connected to the frame 210, so that the maintenance or replacement of the handrail 160 by a worker is facilitated.

Further, as shown in fig. 1, 2 and 3, the ladder assembly 100 further includes a handle 170. Specifically, the handle 170 is rotatably disposed on the movable frame 141, that is, the handle 170 can rotate relative to the movable frame 141, when the worker needs to retract or extend the retractable ladder assembly 140, the worker can hold the handle 170 to control the movable frame 141 to slide up and down, and during the up-and-down sliding process of the movable frame 141, the wrist does not need to rotate, and the handle 170 can rotate along with the up-and-down movement of the movable frame 141, so that the worker can control the movable frame 141 more conveniently. Furthermore, the handle 170 is M-shaped, so that the worker can hold the handle 170 more comfortably, and the design manner is more ergonomic.

EXAMPLE seven

As shown in fig. 7, an embodiment of the present invention provides a milling machine 200 including a frame 210 and the ladder assembly 100 of any of the embodiments described above. Specifically, the ladder frame 110 of the ladder assembly 100 is coupled to the frame 210. It should be noted that the connection between the ladder stand 110 and the frame 210 may be welding, or may be detachable through bolts or other methods.

Further, the milling machine 200 further includes an operation table, the operation table is disposed on the frame 210, and the ladder assembly 100 is located on the frame 210 near the operation table.

Further, the ladder assembly 100 also includes a handrail 160. Specifically, one end of the handrail 160 is connected to the ladder frame 110, and the other end of the handrail 160 is connected to the frame 210. Through setting up handrail 160, can protect the side of cat ladder assembly 100, the staff can pull handrail 160 when going up the operating area, greatly reduced the staff possibility of falling.

According to the embodiment of the ladder stand assembly and the milling machine, the telescopic ladder stand component is additionally arranged in the ladder stand assembly, and the movable pedal can be adjusted up and down, so that the movable pedal can be retracted and unfolded to meet the requirements of different operation scenes. The ladder stand assembly can be suitable for various engineering machines such as a milling machine and the like, when the milling machine carries out transition operation, the supporting legs of the milling machine generally need to be lifted to the highest point, the height of the supporting legs from the ground is higher, and at the moment, the movable frame in the telescopic ladder stand assembly can be slid to the second position, so that the overall length of the ladder stand assembly is increased, and workers can conveniently go up and down an operation area; when the milling machine carries out the maximum degree of depth and mills and plane, slide the adjustable shelf in the flexible cat ladder subassembly to the primary importance, make the overall length of cat ladder assembly be in the shortest state, greatly reduced cat ladder assembly and ground take place the possibility of colliding with to play the effect of protection to the cat ladder assembly to a certain extent.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A ladder assembly (100) comprising:

the ladder frame (110) is used for being connected with the frame (210);

a fixed pedal (131) provided to the ladder frame (110);

a telescoping ladder assembly (140) comprising:

a movable frame (141) slidably connected to the ladder frame (110);

a movable pedal (143) provided to the movable frame (141);

the movable frame (141) slides to a first position, the movable pedal (143) abuts against the fixed pedal (131), or the distance between the movable pedal (143) and the fixed pedal (131) is a first distance, and the movable frame (141) and the stair climbing frame (110) are relatively fixed through a limiting structure (150); the movable frame (141) slides to a second position, the distance between the movable pedal (143) and the fixed pedal (131) is a second distance, and the second distance is larger than the first distance.

2. The ladder assembly (100) according to claim 1, wherein the ladder frame (110) is provided with a slide slot (120), the movable frame (141) is provided with a guide post (142), the guide post (142) is a cylinder, the guide post (142) extends into the slide slot (120), the guide post (142) and the slide slot (120) are mutually matched to realize the relative sliding of the movable frame (141) and the ladder frame (110),

wherein the guide column (142) is fixedly connected to the movable frame (141); or the guide post (142) is rotatably connected to the movable frame (141).

3. The ladder assembly (100) of claim 2 wherein the chute (120) comprises:

an elevating unit (121);

a translation unit (122) having a longitudinal direction of the translation unit (122) perpendicular to a longitudinal direction of the lifting unit (121);

a lock section (123) whose longitudinal direction coincides with the longitudinal direction of the lifting section (121),

wherein one end of the translation portion (122) is in communication with the lifting portion (121), the other end of the translation portion (122) is in communication with the locking portion (123), the movable frame (141) is in the second position, and the guide column (142) is at one end of the lifting portion (121) near the movable pedal (143); the movable frame (141) slides from the second position to the first position, and the guide column (142) passes through the lifting unit (121), the translation unit (122), and the locking unit (123) in this order.

4. The ladder climbing assembly (100) according to claim 2, wherein the number of the sliding grooves (120) is two, the number of the guide posts (142) is two, and each guide post (142) is slidably connected with a corresponding one of the sliding grooves (120).

5. The ladder assembly (100) of claim 1 wherein the restraining structure (150) comprises:

a first section (151) provided to the movable frame (141);

a second portion (152) provided to the ladder frame (110),

wherein the movable frame (141) slides to the first position, the first portion (151) can extend into the second portion (152) to relatively fix the movable frame (141) and the ladder frame (110).

6. The ladder assembly (100) of claim 5 wherein the first portion (151) is a snap and the second portion (152) is a lock ring.

7. The ladder assembly (100) of claim 1 wherein the fixed step (131) is provided with a first lightening hole (132), a side of the fixed step (131) remote from the movable step (143) is provided with a first protrusion (133), and the first protrusion (133) is arranged around the first lightening hole (132); and/or

A second lightening hole (144) is formed in the movable pedal (143), a second protrusion (145) is formed in one side, close to the fixed pedal (131), of the movable pedal (143), and the second protrusion (145) is arranged around the second lightening hole (144).

8. The ladder assembly (100) of claim 1 further comprising:

the handrail (160), one end of handrail (160) is connected with the ladder frame (110), and the other end of handrail (160) is used for being connected with the frame (210).

9. The ladder assembly (100) of claim 1 further comprising:

the handle (170) is rotatably arranged on the movable frame (141), and the handle (170) is M-shaped.

10. A milling machine (200), comprising:

a frame (210);

a ladder climbing assembly (100) as claimed in any one of claims 1 to 9 wherein the ladder frame (110) of the ladder assembly (100) is connected to the vehicle frame (210), the ladder assembly (100) including a hand rail (160), the hand rail (160) being connected to the vehicle frame (210).

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