Crawling ladder assembly and engineering machinery

Abstract

The utility model relates to the field of engineering machinery, and discloses a ladder stand assembly and engineering machinery, the ladder stand assembly comprises a mounting slide rail, a ladder stand and a support frame, the mounting slide rail is arranged along the vertical direction and is provided with a chute vertically extending upwards from the bottom end and a limiting assembly arranged at the front side of the top end; the limiting assembly comprises a first limiting wheel and a second limiting wheel which are arranged at an interval in the front-back direction of the mounting sliding rail and can rotate, the crawling ladder is arranged on the front side of the mounting sliding rail, and the top end of a ladder beam of the crawling ladder is limited between the first limiting wheel and the second limiting wheel; the supporting frame is arranged in the sliding groove and can axially move between the first limiting wheel and the second limiting wheel and swing in the front-back direction of the installation sliding rail, the first end, in the length direction, of the supporting frame is arranged in the sliding groove in a sliding mode, the second end, in the length direction, of the supporting frame is fixedly connected with the crawling ladder, and the length of the supporting frame is adjustable. According to the ladder stand assembly, a worker can climb the ladder stand in a labor-saving and convenient mode.

Description

Technical Field

[0001] The utility model belongs to the field of engineering machinery, and in particular relates to a ladder assembly and an engineering machinery using the ladder assembly. Background Art

[0002] Ladders are often required in construction machinery to meet the needs of workers. Take concrete mixer trucks as an example. In order to meet the needs of workers to wash or repair the mixing drum, blades, feeding and discharging devices on a daily basis and to observe the feeding and discharging of the mixing drum at any time, a ladder will be installed at the back of the mixer truck. Workers can easily get on and off the mixer truck through the ladder to complete the above operations. Existing ladders are vertically arranged structures. Workers climb up and down straight, which is laborious and inconvenient, and there are certain risks. Utility Model Content

[0003] In view of the above-mentioned deficiencies or defects in the prior art, the utility model provides a ladder assembly and an engineering machine, which can make climbing for workers more labor-saving and convenient.

[0004] To achieve the above object, the utility model provides a ladder assembly, the ladder assembly comprising:

[0005] An installation rail is arranged vertically and is provided with a slide groove extending vertically upward from a bottom end and a limit assembly arranged at a front side of a top end, wherein the limit assembly includes a first limit wheel and a second limit wheel which are arranged at intervals along a front-to-rear direction of the installation rail and are both capable of self-rotation;

[0006] A ladder, wherein the ladder is arranged at the front side of the mounting rail, and the top end of the ladder beam of the ladder is limited between the first limiting wheel and the second limiting wheel, and can move axially between the first limiting wheel and the second limiting wheel and swing along the front-rear direction of the mounting rail;

[0007] A support frame, wherein the first end of the support frame in the length direction is slidably arranged in the slide groove, and the second end in the length direction is fixedly connected to the ladder, and the support frame is arranged to be adjustable in length.

[0008] Optionally, a roller is provided at the first end of the support frame, and the roller is rollably disposed in the slide groove.

[0009] Optionally, the support frame includes a support block and a connecting plate arranged in sequence along the length direction, the ends of the support block and the connecting plate close to each other are detachably connected and the connection position is adjustable along the length direction of the support frame, the end of the support block away from the connecting plate serves as the first end of the support frame, and the end of the connecting plate away from the support block serves as the second end of the support frame.

[0010] Optionally, the support frame also includes a support member, which is detachably connected to one end of the support block close to the connecting plate and the connection position is adjustable along the length direction of the support frame, and one end of the support member away from the support block is bent to form a support portion perpendicular to the length direction of the support frame, and the support portion is located between the two ends of the connecting plate in the length direction of the support frame.

[0011] Optionally, a stop base plate is provided at the bottom end of the mounting slide rail, and the stop base plate cooperates with a bottom stop of the support frame that slides to the bottom end of the mounting slide rail.

[0012] Optionally, the top of the slide groove is provided with an opening for allowing the first end of the support frame to escape, the second end of the support frame is detachably connected to the ladder, and the front side of the mounting slide rail is provided with a hanging plate, and the hanging plate is provided with a recess with an opening facing upward and used to hang the step rod of the ladder.

[0013] Optionally, the ladder assembly further includes a locking mechanism, and the locking mechanism includes:

[0014] A mounting plate, the mounting plate being disposed on the mounting rail and arranged opposite to the notch of the hanging plate;

[0015] A locking member is arranged on the mounting plate and can move in a direction approaching or away from the notch.

[0016] Optionally, the ladder assembly further includes:

[0017] A platform, the platform is arranged at the top end of the mounting rail and extends toward the rear of the mounting rail;

[0018] A guardrail, the guardrail is arranged around the edge of the platform and has a passage opening facing the front of the mounting rail;

[0019] A self-closing door is hinged to the edge of the passage through a spring hinge and can be maintained in a closed position closing the passage under the elastic force of the spring hinge.

[0020] Optionally, the ladder assembly further comprises a limit plate, one end of which is connected to the guardrail, and the other end of which extends to the passage so as to be able to abut against the inner side surface of the self-closing door in the closed position.

[0021] The utility model also provides an engineering machine, comprising the ladder assembly mentioned above.

[0022] Through the above technical scheme, in the ladder assembly of the utility model, the top end of the ladder beam of the ladder is limited between the limit assemblies on the front side of the top end of the mounting rail, and a support frame is supported between the ladder and the mounting rail, and the support frame is arranged to be adjustable in length. In this way, the ladder can be tilted relative to the vertically arranged mounting rail. In actual application, the mounting rail is installed in the construction machinery, and the staff can get on and off the construction machinery by the ladder at an angle, which is more labor-saving, convenient and safer. In addition, the inclination angle of the ladder can be adjusted by adjusting the length of the support frame. In this way, the ladder assembly is suitable for a variety of application scenarios.

[0023] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of the ladder assembly of the utility model;

[0026] Figure 2 The local structure of the ladder assembly of the utility model is shown in FIG. Figure 1 ;

[0027] Figure 3 The local structure of the ladder assembly of the utility model is shown in FIG. Figure 2 ;

[0028] Figure 4 It is a structural schematic diagram of the support frame of the utility model;

[0029] Figure 5 The local structure of the ladder assembly of the utility model is shown in FIG. Figure 3 ;

[0030] Figure 6 It is a structural schematic diagram of the installation slide rail of the utility model.

[0031] Description of reference numerals:

[0032] 1 Install the rails

[0033] 2 First limit wheel

[0034] 3 Second limit wheel

[0035] 4. Ladder

[0036] 5 Support frame

[0037] 5a Support block 5b Connecting plate

[0038] 5c Support piece

[0039] 6 Stop plate

[0040] 7 Hanging board

[0041] 8 Mounting plate

[0042] 9 Locking piece

[0043] 10 Platform

[0044] 11 Guardrail

[0045] 12 Self-closing door

[0046] 13 Limiting plate DETAILED DESCRIPTION

[0047] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0048] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0049] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used to describe the relative positional relationship of components in the direction shown in the drawings or in the vertical, perpendicular or gravity direction.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] The utility model firstly provides a ladder assembly.

[0052] In one embodiment, referring to Figure 1 To Attachment Figure 6 As shown, the ladder assembly includes an installation rail 1, a ladder 4 and a support frame 5. The installation rail 1 is arranged vertically and is provided with a slide groove extending vertically upward from the bottom end and a limit assembly arranged at the front side of the top end. The limit assembly includes a first limit wheel 2 and a second limit wheel 3 that are arranged at intervals along the front and rear directions of the installation rail 1 and can both rotate on their own. The ladder 4 is arranged at the front side of the installation rail 1, and the top end of the ladder beam of the ladder 4 is limited between the first limit wheel 2 and the second limit wheel 3, and can move axially between the first limit wheel 2 and the second limit wheel 3 and swing along the front and rear directions of the installation rail 1. The first end of the support frame 5 in the length direction is slidably arranged in the slide groove, and the second end in the length direction is fixedly connected to the ladder 4, and the support frame 5 is set to be adjustable in length.

[0053] It should be noted that the structure of the ladder 4 itself is well known to those skilled in the art, and is mainly composed of two ladder beams that are parallel and spaced apart and a plurality of treads that are spaced apart along the axial direction of the ladder beams between the two ladder beams.

[0054] When the jack is lifted up, the top of the ladder 4 is stopped at the stopper 2, and the first end of the ladder 4 is stopped at the bottom of the ladder 4, so that the staff can climb up and down the ladder 4, which is convenient and safe. In addition, the inclination angle of the ladder 4 can be adjusted by adjusting the length of the support frame 5. In this way, the ladder assembly is suitable for a variety of application scenarios. For example, in a scenario where the climbing space is relatively narrow, the inclination angle of the ladder 4 can be adjusted to a smaller value. In a scenario where the climbing space is relatively spacious, the inclination angle of the ladder 4 can be adjusted to a larger value, which is more labor-saving.

[0055] Specifically, the limiting assembly may also include a mounting seat, which is fixedly mounted on the top end of the mounting rail 1 and extends toward the front of the mounting rail 1, and the first limiting wheel 2 and the second limiting wheel 3 are respectively rotatably mounted on the mounting seat through a rotating shaft, and a limiting flange is provided at one end of the first limiting wheel 2 and the second limiting wheel 3 away from the mounting seat. In this way, the first limiting wheel 2, the second limiting wheel 3, the mounting seat and the limiting flange define a limiting space at the top end of the ladder beam for limiting the ladder 4.

[0056] In order to improve the reliability and strength of the structure, the installation rail 1 may include two rail units that are both arranged vertically and spaced apart, a connecting top plate connected between the top ends of the two rail units, a connecting bottom plate connected between the bottom ends of the two rail units, and a reinforcing plate connected between the middle positions of the two rail units. The number of limit assemblies is set to two groups, and the two groups of limit assemblies are respectively arranged at the front sides of the top ends of the two rail units and arranged oppositely, and are respectively used to limit the top ends of the two ladder beams of the ladder 4. The two rail units are respectively provided with a slide groove, and the two slide grooves are arranged oppositely. A support frame 5 is respectively arranged between the two rail units and the two ladder beams of the ladder 4, and the first ends of the two support frames 5 are respectively slidably arranged in the two slide grooves, and are connected to each other through an intermediate connecting rod so as to be able to slide synchronously, and the second ends of the two support frames 5 are respectively fixedly connected to the two ladder beams of the ladder 4.

[0057] In this embodiment, the ladder beams and treads of the ladder 4 can be set as a hollow structure, which not only saves manufacturing materials but also reduces weight. At the same time, it can also be made of aluminum alloy material to further reduce weight and facilitate staff to carry and place.

[0058] In order to increase the service life of the first limiting wheel 2 and the second limiting wheel 3, the first limiting wheel 2 and the second limiting wheel 3 can be made of nylon material.

[0059] In order to enable the limiting assembly to adapt to ladders 4 of various specifications, the first limiting wheel 2 and the second limiting wheel 3 can be arranged so that the distance therebetween is adjustable. Specifically, the position of the first limiting wheel 2 can be adjusted along the front-to-rear direction of the mounting rail 1, or the position of the second limiting wheel 3 can be adjusted along the front-to-rear direction of the mounting rail 1.

[0060] In one embodiment, referring to Figure 4 As shown, a roller is provided at the first end of the support frame 5, and the roller is rollably arranged in the slide groove. In this way, the smoothness of the first end of the support frame 5 sliding in the slide groove can be effectively improved.

[0061] In one embodiment, referring to Figure 4 As shown, the support frame 5 includes a support block 5a and a connecting plate 5b arranged in sequence along the length direction, the ends of the support block 5a and the connecting plate 5b close to each other are detachably connected and the connection position is adjustable along the length direction of the support frame 5, the end of the support block 5a away from the connecting plate 5b serves as the first end of the support frame 5, and the end of the connecting plate 5b away from the support block 5a serves as the second end of the support frame 5. In this way, by adjusting the connection position of the ends of the support block 5a and the connecting plate 5b close to each other, the length of the support frame 5 can be adjusted.

[0062] Specifically, the support frame 5 further includes a first fastener, a first waist-shaped hole extending along the length direction of the support frame 5 is opened at one end of the connecting plate 5b close to the supporting block 5a, a first connecting hole corresponding to the first waist-shaped hole is opened at one end of the supporting block 5a close to the connecting plate 5b, and the first fastener is detachably inserted through the first waist-shaped hole and the first connecting hole to fasten and connect the supporting block 5a and the connecting plate 5b. The first fastener can be a bolt.

[0063] In one embodiment, referring to Figure 4 As shown, the support frame 5 further includes a supporting member 5c, which is detachably connected to one end of the support block 5a close to the connecting plate 5b and the connection position is adjustable along the length direction of the support frame 5. One end of the supporting member 5c away from the support block 5a is bent to form a supporting portion perpendicular to the length direction of the support frame 5, and the supporting portion is located between the two ends of the connecting plate 5b in the length direction of the support frame 5. In this way, the ladder 4 can be supported against the supporting portion, effectively improving the reliability and strength of the structure.

[0064] It can be understood that the support member 5c is detachably connected to one end of the support block 5a close to the connecting plate 5b and the connection position is adjustable along the length direction of the support frame 5. This arrangement allows the position of the support member 5c to be aligned with the connecting plate 5b, ensuring that the ladder 4 can accurately rest against the support part.

[0065] Specifically, the support frame 5 further includes a second fastener, a second connection hole is formed at one end of the support block 5a close to the connection plate 5b, and a second waist-shaped hole corresponding to the second connection hole and extending along the length direction of the support frame 5 is formed at the abutting piece 5c, and the second fastener is detachably inserted through the second waist-shaped hole and the second connection hole to fasten and connect the support block 5a and the abutting piece 5c. The second fastener may be a bolt.

[0066] In one embodiment, referring to Figure 3 and attached Figure 6 As shown, a stopper bottom plate 6 is provided at the bottom end of the mounting rail 1, and the stopper bottom plate 6 cooperates with the bottom stopper of the support frame 5 that slides to the bottom end of the mounting rail 1. With such arrangement, when the staff climbs the ladder 4, the bottom surface of the support frame 5 can be supported on the stopper bottom plate 6, further ensuring the reliability of the structure.

[0067] Specifically, the stop base plate 6 can be formed by bending the aforementioned connecting base plate connected between the bottom ends of the two slide rail units.

[0068] In one embodiment, referring to Figure 5 and attached Figure 6 As shown, the top of the slide groove is provided with an opening for the first end of the support frame 5 to escape, the second end of the support frame 5 is detachably connected to the ladder 4, and a hanging plate 7 is provided on the front side of the mounting slide rail 1. The hanging plate 7 is provided with a recess with an opening facing upward and used to hang the step rod of the ladder 4.

[0069] In actual application, when the ladder 4 is not needed, the support frame 5 can be disassembled, and the step rod of the ladder 4 is hung on the notch of the hanging plate 7, so that the ladder 4 is stored and leaned against the mounting rail 1. That is, in this embodiment, the ladder 4 has a storage state.

[0070] Specifically, a U-shaped skeleton rubber strip may be provided at the notch of the hanging plate 7 to prevent the step rod of the ladder 4 from being damaged by direct friction with the hanging plate 7 .

[0071] Specifically, the hanging plates 7 can be fixedly mounted on the aforementioned stop base plate 6 , and a plurality of hanging plates 7 can be spaced apart along the length direction of the stop base plate 6 .

[0072] In one embodiment, referring to Figure 5As shown, the ladder assembly also includes a locking mechanism, which includes a mounting plate 8 and a locking member 9. The mounting plate 8 is arranged on the mounting rail 1 and is arranged opposite to the recess of the hanging plate 7. The locking member 9 is arranged on the mounting plate 8 and can move in a direction close to or away from the recess.

[0073] It can be understood that after the step rod of the ladder 4 is hung on the recess of the hanging plate 7, the locking member 9 of the locking mechanism can be inserted into the port of the step rod, thereby limiting the ladder 4 in the vertical direction through the locking member 9, thereby preventing the ladder 4 from shaking or falling off due to factors such as road bumps during the driving of the construction machinery, thereby effectively improving safety.

[0074] Specifically, a screw-in seat with a threaded hole may be provided on the mounting plate 8, and the locking member 9 may be provided as a screw rod and screwed with the threaded hole of the screw-in seat, and the locking member 9 may be moved in a direction close to or away from the notch by screwing the screw rod. Of course, in other embodiments, the connection structure between the locking member 9 and the mounting plate 8 may also be in other forms.

[0075] In one embodiment, referring to Figure 1 As shown, the ladder assembly also includes a platform 10, a guardrail 11 and a self-closing door 12. The platform 10 is arranged at the top end of the mounting rail 1 and extends toward the rear of the mounting rail 1. The guardrail 11 is arranged around the edge of the platform 10 and has a passage opening toward the front of the mounting rail 1. The self-closing door 12 is hinged to the edge of the passage opening by a spring hinge and can be maintained in a closed position of the closed passage opening under the elastic force of the spring hinge.

[0076] It can be understood that the self-closing door 12 can keep the passage closed under the action of the spring hinge. With this arrangement, the self-closing door 12 can be opened under the action of an external force. When the staff climbs onto the platform 10, the self-closing door 12 can automatically close the passage, effectively improving safety.

[0077] In one embodiment, referring to Figure 1 As shown, the ladder assembly further includes a limit plate 13, one end of which is connected to the guardrail 11, and the other end of which extends to the passage, so as to be able to abut against the inner side of the self-closing door 12 in the closed position. In this way, the limit plate 13 can ensure that the self-closing door 12 accurately closes the passage through the limiting effect of the limit plate 13, and prevents the self-closing door 12 from rotating into the guardrail 11.

[0078] The utility model also provides an engineering machine, the engineering machine comprising the ladder assembly as described above. The specific structure of the ladder assembly refers to the above embodiments. Since the engineering machine adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0079] Among them, the engineering machinery can be a concrete mixer truck.

[0080] The above are only preferred implementation modes of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0081] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0082] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A ladder assembly, characterized in that: The ladder assembly comprises: An installation rail (1), the installation rail (1) being arranged in a vertical direction and provided with a slide groove extending vertically upward from a bottom end and a limit assembly arranged at a front side of a top end, the limit assembly comprising a first limit wheel (2) and a second limit wheel (3) arranged at intervals in a front-to-rear direction of the installation rail (1) and both capable of self-rotation; A ladder (4), wherein the ladder (4) is arranged on the front side of the mounting rail (1), and the top end of the ladder beam of the ladder (4) is limited between the first limiting wheel (2) and the second limiting wheel (3), and is capable of axially moving between the first limiting wheel (2) and the second limiting wheel (3) and swinging in the front-rear direction along the mounting rail (1); A support frame (5), wherein a first end of the support frame (5) in the length direction is slidably arranged in the slide groove, and a second end in the length direction is fixedly connected to the ladder (4), and the support frame (5) is arranged to be adjustable in length.

2. The ladder assembly according to claim 1, characterized in that: The first end of the support frame (5) is provided with a roller, and the roller is rollably arranged in the slide groove.

3. The ladder assembly according to claim 1, characterized in that: The support frame (5) comprises a support block (5a) and a connecting plate (5b) arranged in sequence along the length direction; the ends of the support block (5a) and the connecting plate (5b) close to each other are detachably connected and the connection position is adjustable along the length direction of the support frame (5); the end of the support block (5a) away from the connecting plate (5b) serves as the first end of the support frame (5); and the end of the connecting plate (5b) away from the support block (5a) serves as the second end of the support frame (5).

4. The ladder assembly according to claim 3, characterized in that: The support frame (5) further comprises a supporting member (5c), the supporting member (5c) being detachably connected to one end of the support block (5a) close to the connecting plate (5b), and the connecting position being adjustable along the length direction of the support frame (5); one end of the supporting member (5c) away from the support block (5a) is bent to form a supporting portion perpendicular to the length direction of the support frame (5); the supporting portion is located between the two ends of the connecting plate (5b) in the length direction of the support frame (5).

5. The ladder assembly according to claim 1, characterized in that: A stop base plate (6) is provided at the bottom end of the mounting slide rail (1), and the stop base plate (6) cooperates with the bottom stop of the support frame (5) that slides to the bottom end of the mounting slide rail (1).

6. The ladder assembly according to claim 1, characterized in that: The top end of the slide groove is provided with an opening through which the first end of the support frame (5) can be released, and the second end of the support frame (5) is detachably connected to the ladder (4). The front side of the mounting rail (1) is provided with a hanging plate (7), and the hanging plate (7) is provided with a recess with an opening facing upwards and used for hanging the pedal of the ladder (4).

7. The ladder assembly according to claim 6, characterized in that: The ladder assembly also includes a locking mechanism, which includes: A mounting plate (8), the mounting plate (8) being arranged on the mounting rail (1) and being arranged opposite to the notch of the hanging plate (7); A locking member (9), wherein the locking member (9) is arranged on the mounting plate (8) and is capable of moving in a direction approaching or moving away from the recess.

8. The ladder assembly according to claim 1, characterized in that: The ladder assembly also includes: A platform (10), the platform (10) being arranged at the top end of the mounting rail (1) and extending toward the rear of the mounting rail (1); A guardrail (11), the guardrail (11) being arranged around the edge of the platform (10) and having a passage opening facing the front of the mounting slide rail (1); A self-closing door (12) is hinged to the edge of the passage through a spring hinge and can be maintained in a closed position closing the passage under the elastic force of the spring hinge.

9. The ladder assembly according to claim 8, characterized in that: The ladder assembly further comprises a limit plate (13), one end of which is connected to the guardrail (11), and the other end of which extends to the passage so as to be able to abut against the inner side surface of the self-closing door (12) in the closed position.

10. An engineering machine, characterized in that: The construction machine comprises the ladder assembly according to any one of claims 1 to 9.

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