Turnover type self-locking ladder structure

Abstract

The utility model discloses a turnover type self-locking ladder structure which comprises a fixed base and a turnover ladder, and the turnover ladder and the fixed base are connected and matched through a pin shaft. The reverse limiting structure is used for reversely limiting the turnover ladder in a use state; a supporting structure is arranged on the fixed base, and the supporting structure is used for playing a role in supporting and limiting when the turnover ladder is used and stored. When the turnover ladder is in pin joint with the base, the turnover ladder can be translated and rotated up and down as well as front and back through the guide groove, so that the turnover ladder can be switched between a use state and a storage state according to requirements; meanwhile, a small supporting structure and a reverse limiting structure are applied, the occupied ladder supporting space is smaller, the structure is simpler, folding and locking operation is faster and firmer, and the folding and locking device can better adapt to the compact layout of the whole engineering machine.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of test devices, in particular to a kind of turnover self-locking ladder structure. BACKGROUND

[0002] Currently, the crane market is highly competitive, and weight, cost, energy efficiency and other aspects limit vehicle layout, and the whole machine components are more and more compact. During crane operation and maintenance, it is necessary to climb to operate, so it is necessary to ensure smooth climbing route, but the setting of the passage needs to occupy a certain space to ensure the need of personnel climbing, and the whole machine maintenance and operation also need to reserve a certain space, which is contradictory to the compact space layout of the whole machine.

[0003] In the prior art, the inclined brace and the rib plate of the ladder fixing part occupy a large space; the ladder is only one-way limited in the use state, and when the stepping force is released, the ladder may rebound in the opposite direction, which is unsafe; in addition, after the movable part of the ladder is folded, it needs to be locked and limited by using another component (such as a return-type clamp spring), which is complex to operate and increases the cost; and the rear part of the ladder needs to occupy a large space to arrange the support rod. Therefore, it is necessary to design a ladder structure that can be conveniently stored while reducing the space occupied by the ladder reinforcing rib and the support rod. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a turnover self-locking ladder structure to solve the above problems of the prior art. When the turnover ladder and the base pin are connected, the turnover ladder can be translated and rotated up and down, forward and backward through the guide groove, and the use state and the storage state of the turnover ladder can be switched according to requirements. At the same time, the application of small support structure and reverse limiting structure occupies smaller ladder support space, the structure is simpler, the folding and locking operation is faster and more secure, and it is more suitable for the compact layout of the whole machine of engineering machinery.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A turnover self-locking ladder structure, which comprises a fixed base and a turnover ladder. The turnover ladder and the fixed base are connected and matched by a pin shaft.

[0007] The fixed base comprises a vertically arranged base plate, and two groups of fixed plates are arranged symmetrically along the installation side at both ends of the base plate. The fixed plates are arranged perpendicularly to the base plate, and the two groups of fixed plates are used to install the turnover ladder. The turnover ladder comprises oppositely arranged columns and a stepping plate connected between the columns. Two groups of self-locking mounting plates are arranged vertically on the upper ends of the two side columns. Each group of fixed plates is composed of plate one and plate two arranged in parallel and at intervals. Each group of self-locking mounting plates is correspondingly inserted between plate one and plate two of each group of fixed plates.

[0008] The guiding groove is provided with a pin shaft hole one and a pin shaft hole two on both sides of the guiding groove, the pin shaft passes through the pin shaft hole one, the guiding groove and the pin shaft hole two in sequence to pass through the first plate, the self-locking mounting plate and the second plate, so that the folding ladder and the fixed base are connected.

[0009] The guiding groove is provided with a pin shaft hole one and a pin shaft hole two on both sides of the guiding groove, the pin shaft passes through the pin shaft hole one, the guiding groove and the pin shaft hole two in sequence to pass through the first plate, the self-locking mounting plate and the second plate, so that the folding ladder and the fixed base are connected.

[0010] The reverse limiting structure is installed on the fixed base.

[0011] The reverse limiting structure includes a lower pin shaft hole and a dividing pin, the guiding groove of the self-locking mounting plate is provided with a reverse limiting hole below the guiding groove, the first plate of the two fixed plates is arranged on the outer side of the self-locking mounting plate, the first plate extends downward to form an ear plate relative to the second plate, the ear plate is provided with the lower pin shaft hole corresponding to the position of the reverse limiting hole, and the dividing pin is installed in the lower pin shaft hole and is in axial alignment with the reverse limiting hole.

[0012] The support structure is arranged on the fixed base and can support and limit the folding ladder in both the use state and the storage state.

[0013] The support structure includes a support plate body which is attached to the non-mounting side of the base plate, the support plate body extends upward to form a support bent plate, the lower edge of the support plate body attached to the base plate extends to the mounting side and the non-mounting side of the base plate to form a bottom supporting plate, the bottom supporting plate extends along both ends and is vertically bent downward to form a support side plate, and the edge of the support side plate located on the mounting side extends to the mounting side and is vertically bent outward to form a support ear plate.

[0014] The distance between the first plate and the second plate of the fixed plate is equal to the thickness of the self-locking mounting plate.

[0015] The pin shaft is provided with a plug pin at the end, and the plug pin is inserted into the end of the pin shaft to prevent the pin shaft from falling out.

[0016] The guiding groove is in the shape of "ㄣ", when the folding ladder is in the use state, the pin shaft is located at the upper end point of the guiding groove and is clamped with the upper end point, when the folding ladder needs to be switched to the storage state, the folding ladder is turned around the pin shaft to the position, the pin shaft moves along the path of the guiding groove and moves to the other end point of the guiding groove.

[0017] The folding ladder has the following beneficial effects:

[0018] 1. A turnover self-locking ladder structure for engineering machinery, comprising a base, a guide groove, a reverse limiting structure and a support structure, the guide groove being arranged on a turnover ladder, the base and the turnover ladder being connected by a pin joint, the turnover ladder being able to be translated and rotated up and down and forward and backward through the guide groove when the turnover ladder and the base are connected by the pin joint, and the use state and the storage state of the turnover ladder being able to be switched according to requirements; meanwhile, a small support structure and a reverse limiting structure are applied. Compared with other technical solutions, the ladder support space occupied is smaller, the structure is simpler, the folding and locking operation is faster and more secure, and the turnover self-locking ladder structure is suitable for the compact layout characteristics of the engineering machinery.

[0019] 2. The reverse limiting structure is arranged and used for reversely limiting the turnover ladder in the use state, so that the climbing stability of the turnover self-locking ladder structure is improved; through the arrangement of the reverse limiting structure, the ladder can be reversely limited at the moment when the stepping force is released and when the vehicle is working and vibrating, so that the rebound and jumping of the ladder are prevented. The ladder reverse limiting structure makes the climbing and transportation process more stable and safe.

[0020] 3. The small support structure is arranged on the fixed base, the support structure is integrated with the fixed base, and the volume of the ladder support part is reduced.

[0021] 4. The utility model provides a guide groove structure form for limiting the movement of the turnover ladder, reduces the turnover steps of the ladder, and is more convenient to operate; and the guide groove is equivalent to a ladder self-locking structure, so that the ladder storage limiting part is integrated with the ladder, cost is saved, and the shape of the turnover ladder guide groove can be changed to realize the suspension and limiting of multiple positions. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structure schematic view of a turnover self-locking ladder structure.

[0023] Figure 2 is a pin joint schematic view of a fixed base and a turnover ladder.

[0024] Figure 3 is a support structure and a reverse limiting structure effective schematic view in a use state of a turnover ladder.

[0025] Figure 4 is a turnover ladder from a use state to a storage state switching schematic view.

[0026] Figure 5 is a self-locking structure effective schematic view in a storage state of a turnover ladder.

[0027] Among them:

[0028] 1. fixed base; 1.1 support structure; support plate body 1.1.1; bottom support plate 1.1.2; support bent plate 1.1.3; support side plate 1.1.4; support ear plate 1.1.5; 1.2 pin shaft hole one; 1.3 base plate; 1.4 fixed plate; 1.5 pin shaft hole two; plate one 1.4.1; plate two 1.4.2;

[0029] 2. Turnover ladder; 2.1 self-locking mounting plate; 2.2 guide groove; Guide groove one end point; Guide groove other end point; 2.3 reverse limiting hole;

[0030] 3. Reverse limiting structure; 3.1 lower pin shaft hole; 3.2 division pin.

[0031] 4. Pin shaft DETAILED DESCRIPTION

[0032] The utility model will be further explained in detail below in combination with the drawings and specific preferred embodiments.

[0033] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "left side", "right side", "upper part", "lower part" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and "first", "second" and the like do not represent the importance of the parts, so it cannot be understood as a limitation on the utility model. The specific size used in the embodiment is only used to illustrate the technical scheme and does not limit the protection scope of the utility model.

[0034] As shown in the drawings, Figures 1-5 A turnover self-locking ladder structure, comprising a fixed base 1 and a turnover ladder 2, the turnover ladder and the fixed base are connected and matched through a pin shaft 4.

[0035] The fixed base comprises a vertical base plate 1.3, two groups of fixed plates 1.4 are arranged symmetrically along the mounting side at both ends of the base plate, and the fixed plates are arranged perpendicularly to the base plate, and the two groups of fixed plates are used to install the turnover ladder. Understandably, the mounting side is the side where the turnover ladder is arranged.

[0036] The turnover ladder comprises oppositely arranged columns and a stepping plate connected between the columns, and two groups of self-locking mounting plates 2.1 are arranged vertically on the upper ends of the two side columns.

[0037] Each group of fixed plates is composed of plate one 1.4.1 and plate two 1.4.2 arranged in parallel and at intervals, and each group of self-locking mounting plates is correspondingly inserted between plate one and plate two of each group of fixed plates. That is, the turnover ladder is installed on the fixed plate through the self-locking mounting plate, and the interval space between plate one and plate two forms the installation space of the turnover ladder.

[0038] Preferably, the first plate and the second plate of the fixing plate are welded on the base.

[0039] It can be understood that the distance between the first plate and the second plate of the fixing plate should be adjusted to ensure that the self-locking mounting plate can drive the folding ladder to rotate stably and safely between the first plate and the second plate; preferably, the distance between the first plate and the second plate of the fixing plate is equal to the thickness of the self-locking mounting plate.

[0040] Each set of self-locking mounting plates is provided with a guide groove 2.2, and the first plate and the second plate on both sides of the guide groove are provided with pin shaft holes one and two, respectively. The pin shaft passes through the first plate, the self-locking mounting plate and the second plate in sequence through the pin shaft hole one, the guide groove and the pin shaft hole two, thereby connecting the folding ladder and the fixing base.

[0041] The end of the pin shaft is provided with a latch, and the latch is inserted into the end of the pin shaft to prevent the pin shaft from coming out.

[0042] The size of the guide groove is adapted to the size of the pin shaft, and the pin shaft can move along the path of the guide groove. The pin shaft is displaced to different positions in the guide groove, which is used for state switching of the folding ladder in use state and storage state.

[0043] In order to improve the climbing stability of the folding self-locking ladder structure, a reverse limiting structure 3 is further included for reverse limiting the folding ladder in use state. By setting the reverse limiting structure, the ladder can be reversely limited at the moment when the stepping force is released and when the vehicle is working, so as to prevent the ladder from bouncing and jumping.

[0044] Optionally, the reverse limiting structure is installed on the fixing base.

[0045] The reverse limiting structure includes a lower pin shaft hole 3.1 and a dividing pin 3.2. A reverse limiting hole 2.3 is formed below the guide groove of the self-locking mounting plate. The first plate of the two sets of fixing plates is arranged on the outer side of the self-locking mounting plate, and the first plate extends downward relative to the second plate to form an ear plate. The lower pin shaft hole is formed in the part of the ear plate corresponding to the reverse limiting hole, and the dividing pin is installed in the lower pin shaft hole and is axially aligned with the reverse limiting hole. By inserting the dividing pin into the reverse limiting hole of the folding ladder, the movement of the folding ladder in use state is limited, thereby realizing the function of reverse limiting.

[0046] The dividing pin is a dividing pin in the prior art, which is used for positioning the linear motion and rotary motion mechanism of multiple fixing points. The dividing pin is composed of a pin body, a pin head, a handle and an internal spring. The handle can be operated to extend or retract the pin shaft, so as to easily position it.

[0047] Optionally, the reverse limiting structure can also be in the form of a latch or a buckle.

[0048] Optionally, the reverse limiting structure can also be installed on the folding ladder or separately installed.

[0049] The fixed base is provided with a support structure 1.1, which is used for supporting and limiting in both the use state and the storage state of the turnover ladder.

[0050] The support structure comprises a support plate body 1.1.1 which is attached to the non-mounting side of the base plate; preferably, the base plate and the support plate body are attached by a plurality of bolts.

[0051] The upper end of the support plate extends away from the mounting side of the base plate, forming a support bent plate 1.1.3, which is in the shape of a "U" with the support plate; the support bent plate is used for being fixed to the base structure where the ladder structure is used.

[0052] The lower edge of the support plate body attached to the base plate extends to the mounting side and the non-mounting side of the base plate, forming a bottom supporting plate 1.1.2, which is in the shape of a "V" with the support plate; the bottom supporting plate supports the lower edge of the base plate and provides stable support for the base plate.

[0053] The bottom supporting plate extends along the two ends and is vertically bent downward, forming a support side plate 1.1.4; it can be understood that the bottom supporting plate extends along the two ends, and the length of the extended bottom supporting plate is adapted to the width of the turnover ladder, and the support side plate provides a support base for the turnover ladder.

[0054] The edge part of the support side plate located on the mounting side extends to the mounting side and is vertically bent outward, forming a support ear plate 1.1.5, which is used for being attached to the turnover ladder and providing stable support for the turnover ladder.

[0055] It can be understood that the extension distance of the support ear plate on the mounting side is close to the mounting position of the column of the turnover ladder and the self-locking mounting plate, and the vertically bent outward plane is used for being attached to the column and the self-locking mounting plate to provide stable support for the turnover ladder.

[0056] The utility model discloses a small support structure is arranged on the fixed base, and the support structure is integrated with the fixed base, and the volume of the ladder support part is reduced.

[0057] Preferably, the guide groove is in the shape of a "N", and when the turnover ladder is in the use state, the pin shaft is located at the upper end point of the guide groove and is clamped with the upper end point; when the turnover ladder needs to be switched to the storage state, the turnover ladder is turned around the pin shaft to the position, and the pin shaft moves along the path of the guide groove and moves to the other end point of the guide groove.

[0058] It can be understood that the utility model reduces the steps of turning over the ladder, and the operation is more convenient; and the guide groove is equivalent to the self-locking structure of the ladder, so that the ladder storage limiting part is integrated with the ladder, and the cost is saved.

[0059] ​Preferably, the guide groove is in a "ㄣ" shape. The utility model provides a method for using a flip-type self-locking ladder.

[0060] like Figure 3 As shown, when the flip ladder is in use, the flip ladder is placed vertically, and the pin is located at the upper end of the guide groove. in this state, the indexing pin can be inserted into the reverse limit hole of the flip ladder, and at the same time, the rear end face of the flip ladder is moved just against the supporting structure of the fixed base. At this time, the ladder is stable and can be climbed.

[0061] like Figures 4-5 As shown, when the flip ladder needs to be transformed into the storage state, the flip ladder can be flipped; first, the indexing pin inserted into the reverse limit hole is retracted, and the flip ladder is rotated around the pin shaft. After rotating to a certain angle, the flip ladder can be moved along the guide groove path so that the pin I is at the other end point of the ladder guide groove. At this time, the front end of the ladder just rests on the supporting structure of the fixed base, which limits the turning movement of the ladder and realizes suspension and self-locking limit through the guide groove.

[0062] Optionally, the shape of the ladder guide groove can be changed to achieve hanging and limiting at multiple positions.

[0063] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.

Claims

1. A self-locking flip-over ladder structure, characterized by: The fixed base comprises a base plate arranged vertically, two groups of fixed plates symmetrically arranged along the mounting side at both ends of the base plate, and the fixed plates are arranged perpendicularly to the base plate, and the two groups of fixed plates are used to mount the turnover ladder. The turnover ladder comprises two columns arranged oppositely and a stepping plate connected between the two columns, and two groups of self-locking mounting plates are arranged on the upper ends of the two columns in the vertical direction. Each group of fixed plates is composed of plate one and plate two arranged in parallel and at intervals. Each group of self-locking mounting plates is provided with a guide groove, and plate one and plate two on both sides of the guide groove are provided with pin shaft hole one and pin shaft hole two correspondingly. The pin shaft passes through plate one, the self-locking mounting plate and plate two in sequence through pin shaft hole one, the guide groove and pin shaft hole two, so as to connect the turnover ladder and the fixed base.

2. The inverted self-locking ladder structure according to claim 1, characterized in that: The size of the guide groove is adapted to the size of the pin shaft, the pin shaft can move along the path of the guide groove, and the pin shaft is displaced to different positions in the guide groove, which is used for state switching of the ladder in use state and storage state.

3. The inverted self-locking ladder structure according to claim 2, characterized in that: The reverse limiting structure is installed on the fixed base.

4. The inverted self-locking ladder structure according to claim 3, characterized in that: The reverse limiting structure comprises a lower pin shaft hole and a dividing pin.

5. The inverted self-locking ladder structure according to claim 4, characterized in that: The guide groove of the self-locking mounting plate is provided with a reverse limiting hole below.

6. The inverted self-locking ladder structure according to claim 1, characterized in that: Plate one of the two groups of fixed plates is arranged outside the self-locking mounting plate, and the ear plate is formed by extending downward relative to plate two, and the lower pin shaft hole is provided at the position corresponding to the reverse limiting hole, and the dividing pin is installed in the lower pin shaft hole and is axially aligned with the reverse limiting hole.

7. The inverted self-locking ladder structure according to claim 6, characterized in that: The support structure is used for supporting and limiting in both use and storage states of the turnover ladder. The support structure comprises a support plate body assembled with the base plate on the non-mounting side of the base plate.

8. The inverted self-locking ladder structure according to claim 1, characterized in that: The support plate body extends upward to form a support bent plate.

9. The inverted self-locking ladder structure according to claim 1, characterized in that: The lower edge of the support plate body is extended to the mounting side and the non-mounting side of the base plate to form a bottom supporting plate, and the bottom supporting plate is extended along both ends and is vertically bent downward to form a support side plate.

10. The inverted self-locking ladder structure according to claim 2, characterized in that: The edge part of the support side plate on the mounting side is extended to the mounting side and is vertically bent outward to form a support ear plate. The distance between plate one and plate two of the fixed plate is equal to the thickness of the self-locking mounting plate. The pin shaft is provided with a plug at the end, and the plug is inserted into the end of the pin shaft to prevent the pin shaft from falling out. The guide groove is in the shape of "ㄣ", when the turnover ladder is in use, the pin shaft is located at the upper end point of the guide groove and is clamped with the upper end point, when the turnover ladder needs to be switched to the storage state, the turnover ladder is turned around the pin shaft to the position, and the pin shaft moves along the path of the guide groove to the other end point of the guide groove.

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