CN114684024A - Linkage device for stair folding and supporting leg locking and engineering vehicle - Google Patents
Linkage device for stair folding and supporting leg locking and engineering vehicle Download PDFInfo
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- CN114684024A CN114684024A CN202210330807.6A CN202210330807A CN114684024A CN 114684024 A CN114684024 A CN 114684024A CN 202210330807 A CN202210330807 A CN 202210330807A CN 114684024 A CN114684024 A CN 114684024A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R3/00—Arrangements of steps or ladders facilitating access to or on the vehicle, e.g. running-boards
- B60R3/007—Removable steps or ladders, e.g. foldable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R3/00—Arrangements of steps or ladders facilitating access to or on the vehicle, e.g. running-boards
- B60R3/02—Retractable steps or ladders, e.g. movable under shock
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
Abstract
The invention discloses a linkage device for stair folding and landing leg locking and an engineering vehicle, wherein the linkage device for stair folding and landing leg locking comprises a folding stair, a landing leg and a linkage locking mechanism, the folding stair is arranged on a frame in a foldable and closed manner, the landing leg can be abutted against the folding stair and drives the folding stair to perform folding and closing movement when performing retraction movement, the linkage locking mechanism is arranged on the folding stair and can lock the landing leg under the driving of the folding and closing movement of the folding stair, the locking effect on the landing leg is realized when the folding stair completes the folding and closing operation, so that the occurrence of interference phenomenon is avoided, the linkage device can be freely combined and assembled with chassis with different wheelbases, and the purpose of improving the universality is achieved.
Description
Technical Field
The invention belongs to the technical field of engineering machinery, and particularly relates to a linkage device for stair folding and landing leg locking and an engineering vehicle.
Background
As shown in fig. 1, at present, fixed stairs 01 are installed at the tail of a pump truck, the stairs 01 are generally two-step stairs or three-step stairs, and are fixed at the tail of the pump truck by bolts, and meanwhile, a supporting leg lock 03 is installed on a rear supporting leg 02 of the pump truck, so that the rear supporting leg 02 is prevented from being thrown away when the pump truck runs. However, after the rear support leg 02 is retracted, the vertical oil cylinder 03 of the rear support leg 02 is closely spaced from the stair 01, and if the chassis is replaced by a chassis with other wheelbase, interference is easy to occur, and particularly when the rear support leg is installed on an offshore pump truck at an export, assembly is often seriously affected by the structural form of the stair 01, and the universality is poor. In addition, the support leg lock 03 is fixed behind the rear support leg 02, and is prone to interference with the balance valve of the stair 01 and the vertical oil cylinder 04.
Disclosure of Invention
Aiming at the defects or shortcomings, the invention provides a linkage device for stair folding and leg locking and an engineering vehicle, and aims to solve the technical problem that the universality is influenced because a fixed stair on the conventional pump truck is easily interfered with a vertical oil cylinder and a leg lock on a rear leg.
In order to achieve the above object, the present invention provides a stair folding and leg locking linkage device, wherein the stair folding and leg locking linkage device comprises: folding stairs, support legs and a linkage locking mechanism; the folding stairs are arranged on the frame in a foldable and closable manner; the support legs can be abutted against the folding stairs and drive the folding stairs to perform folding closing movement when performing retraction movement; the linkage locking mechanism is arranged on the folding stair and can lock the supporting legs under the driving of the folding closing movement of the folding stair.
In the embodiment of the invention, the linkage locking mechanism comprises a connecting rod assembly arranged on the folding stair and a locking shaft connected with the connecting rod assembly, the locking shaft is arranged corresponding to a locking through hole formed in the frame, and the connecting rod assembly is used for linkage along with the folding closing movement of the folding stair so as to drive the locking shaft to extend out of the frame from the locking through hole and abut against the supporting leg.
In an embodiment of the invention, the collapsible stairway comprises a first support for fixed arrangement on the frame, a first tread arranged laterally deflectable on the first support, and a second support connected with the first tread, the second support being located outside the collapsible stairway and being adapted to abut against the leg for lateral collapsing closure of the collapsible stairway towards the first support.
In the embodiment of the invention, the connecting rod assembly comprises a first connecting rod and a second connecting rod movably hinged on the first connecting rod, two ends of the first connecting rod are respectively and correspondingly and rotatably arranged on the first support and the second support, and one end of the second connecting rod, which is far away from the first connecting rod, is connected with the locking shaft.
In the embodiment of the invention, the first connecting rod is rotatably arranged on the first support through a first connecting shaft, the second connecting rod is connected with the locking shaft through a second connecting shaft, the connecting rod assembly further comprises an elastic piece, and two ends of the elastic piece are respectively arranged on the first connecting shaft and the second connecting shaft in a one-to-one correspondence manner.
In the embodiment of the invention, the second support comprises a first mounting rod which is obliquely and extendedly arranged, a first mounting frame which is arranged on the first mounting rod and is positioned below the first mounting rod, and a support rod which is bent and extendedly arranged downwards from the upper end of the first mounting rod, the first pedal is arranged on the first mounting frame, and one end of the support rod, which is far away from the first mounting rod, is used for abutting against the upper end face of the frame when the folding stair is folded and unfolded.
In the embodiment of the invention, the support rod is provided with a guide wheel which extends outwards.
In an embodiment of the invention, the first pedal comprises a plate body and two rotating shafts respectively arranged at two ends of the plate body, and the two rotating shafts are respectively rotatably arranged on the first support and the second support in a one-to-one correspondence manner.
In the embodiment of the invention, the folding stair comprises telescopic folding mechanisms which are oppositely arranged on the frame at intervals and a second pedal which is arranged on the two telescopic folding mechanisms, wherein a driving rod is arranged on the telescopic folding mechanism which is positioned on the outer side of the folding stair and is used for abutting against a supporting leg so as to enable the folding stair to be folded upwards and closed.
In the embodiment of the invention, the telescopic folding mechanisms comprise a first hinge rod and a second hinge rod, the first hinge rod and the second pedal are arranged in parallel relatively, the previous second hinge rod and the next second hinge rod are arranged in parallel relatively to form a diamond hinge, the second hinge rods of the two telescopic folding mechanisms, which are arranged close to the frame, are respectively provided with a sliding groove along the length direction, and two ends of the connecting rod components are respectively slidably arranged in the sliding grooves of the two telescopic folding mechanisms in a one-to-one correspondence manner.
In order to achieve the above object, the present invention provides a work vehicle, wherein the work vehicle comprises a stair folding and leg locking linkage according to the above.
Through the technical scheme, the linkage device for stair folding and leg locking provided by the embodiment of the invention has the following beneficial effects:
when the linkage device for folding and locking the stairs is used, the linkage device comprises the folding stairs, the supporting legs and the linkage locking mechanism, when the supporting legs are retracted, the supporting legs can be abutted against the folding stairs, so that the folding stairs perform folding closing movement, and the linkage locking mechanism arranged on the folding stairs can lock the retracted supporting legs under the driving of the folding closing movement of the folding stairs, so that the locking effect on the supporting legs is realized while the folding stairs complete folding closing operation. Meanwhile, the utility model has the characteristics of simplicity, practicability and beauty, and reduces the cost to a certain extent.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic view of a prior art fixed stairway and rear leg construction;
FIG. 2 is a schematic structural view of a stair fold and leg lock linkage according to an embodiment of the present invention;
FIG. 3 is a schematic view of the folding stair in the stair fold and leg locking linkage in one embodiment of the present invention from one perspective in a side folded open position;
FIG. 4 is a schematic view of a folded stair in a stair fold and leg lock linkage in an embodiment of the invention from a single perspective in a laterally folded closed position;
FIG. 5 is a schematic side-folded open configuration of a collapsible stairway according to an embodiment of the invention;
FIG. 6 is a schematic side-folded closed configuration of a collapsible stairway according to an embodiment of the invention;
FIG. 7 is a schematic structural view of the collapsible stairway in an alternative view of the stair collapse and leg locking linkage in a laterally collapsed open position according to an embodiment of the present invention;
FIG. 8 is an enlarged schematic view of the structure at A in FIG. 7;
FIG. 9 is a schematic view of a folded stair in a stair fold and leg lock linkage in an embodiment of the invention from one perspective in a laterally folded closed position;
FIG. 10 is an enlarged schematic view of the structure at B in FIG. 9;
FIG. 11 is a schematic view of the folding stairs in a downward folded open position in the stair fold and leg locking linkage according to another embodiment of the present invention;
FIG. 12 is a schematic view of the folding stairs in an upward folded closed position in a stair fold and leg locking linkage according to another embodiment of the present invention;
fig. 13 is a schematic view of the structure of a folding stair and a linkage locking mechanism according to another embodiment of the invention.
Description of the reference numerals of figure 1
01 rear support of stair 02
03 supporting leg lock 04 vertical oil cylinder
Description of the reference numerals
1 folding stair 11 first support
111 second mounting bar 112 second mounting bracket
113 a first fixed block 12 and a second support
121 first mounting rod 122 first mounting bracket
123 second fixed block 124 support rod
125 leading wheel 13 first pedal
131 rotating shaft 14 stair railing
2-link assembly 21 first link
22 second link 23 spring
24 first connecting shaft 25 second connecting shaft
26 third connecting shaft 27 fourth connecting shaft
3 landing leg 31 stopper
4 locking shaft 5 telescopic folding mechanism
51 first hinge rod 52 second hinge rod
53 drive rod 54 chute
6 second pedal 7 vehicle frame
71 locking through hole 8 linkage locking mechanism
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
The stair folding and leg locking linkage of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 2, the present invention provides a stair folding and leg locking linkage, wherein the stair folding and leg locking linkage comprises:
the folding stair 1 is arranged on the frame 7 in a foldable and closable manner;
the support legs 3 can be abutted against the folding stair 1 and drive the folding stair 1 to perform folding and closing movement when performing retraction movement; and
the linkage locking mechanism 8 is arranged on the folding stair 1 and can lock the supporting legs 3 under the driving of the folding closing motion of the folding stair 1.
When the linkage device for the folding and leg locking of the stair is used, the linkage device comprises the folding stair 1, the legs 3 and the linkage locking mechanism 8, when the legs 3 are retracted, the legs can abut against the folding stair 1, so that the folding stair 1 can perform folding and closing movement, and the linkage locking mechanism 8 arranged on the folding stair 1 can lock the retracted legs 3 under the driving of the folding and closing movement of the folding stair 1, so that the locking effect on the legs 3 is realized while the folding and closing operation of the folding stair 1 is completed, and the linkage device for the folding and leg locking of the stair provided by the invention avoids the occurrence of interference phenomenon, can be freely combined and assembled with chassis with different wheelbases, and achieves the purpose of improving the universality. Meanwhile, the utility model has the characteristics of simplicity, practicability and beauty, and reduces the cost to a certain extent.
Referring to fig. 2 to 4, in the embodiment of the present invention, the linkage locking mechanism 8 includes a connecting rod assembly 2 disposed on the folding stair 1 and a locking shaft 4 connected to the connecting rod assembly 2, the locking shaft 4 is disposed corresponding to a locking through hole 71 formed in the frame 7, and the connecting rod assembly 2 is configured to perform linkage along with the folding closing movement of the folding stair 1, so as to drive the locking shaft 4 to extend upward from the locking through hole 71 to the frame 7 and abut against the support leg 3. Can take place the butt with folding stair 1 when landing leg 3 withdraws promptly, so that folding stair 1 carries out the folding motion of closing, and link assembly 2 setting of linkage locking mechanism 8 is on folding stair 1, then folding stair 1 is when carrying out the folding motion of closing, link assembly 2 can be followed the folding motion of closing of folding stair 1 and linked, so that the locking axle 4 of being connected with link assembly 2 upwards stretches out and takes place the butt with the landing leg 3 of withdrawing from the locking through-hole 71 on frame 7, thereby realized the locking effect to landing leg 3 through locking axle 4 when folding stair 1 accomplishes the folding operation of closing. Of course, the invention is not limited thereto, and the leg 3 may be locked by other suitable interlocking locking mechanisms 8.
It should be noted that the landing leg 3 of the present invention may be a rear landing leg on a pump truck, the linkage device for folding the stairs and locking the landing leg provided in the present invention is not limited to be applied to the pump truck, and other devices adopting the linkage device for folding the stairs and locking the landing leg of the present invention should also fall within the protection scope of the present invention. In addition, the locking through hole 71 may be opened on a running board of the frame 7, and a notch for the folding and unfolding of the folding stair 1 is correspondingly formed at the rear end of the running board of the frame 7.
Referring to fig. 2, 5 and 6, in the embodiment of the present invention, the collapsible stairway 1 includes a first support 11 fixedly disposed on the frame 7, a first tread 13 laterally deflectably disposed on the first support 11, and a second support 12 connected to the first tread 13, the second support 12 being located outside the collapsible stairway 1 and being used for abutting against the leg 3 to enable the collapsible stairway 1 to be laterally collapsed and closed toward the first support 11. Namely, the first support 11 and the second support 12 are respectively arranged at two sides of the folding stair 1, the first support 11 is fixedly arranged at the inner side of the folding stair 1, the second support 12 can be arranged at the outer side of the folding stair 1 in a driving manner, and the first pedal 13 can be arranged between the first support 11 and the second support 12 in a laterally deflecting manner, so that when the support legs 3 are retracted, the support legs can be abutted against the second support 12 at the outer side of the folding stair 1, and in the process of retracting the support legs 3, the second support 12 and the first pedal 13 connected with the second support 12 are pushed to deflect towards the first support 11, until the support legs 3 are fully retracted, the lateral folding and closing of the folding stair 1 can be completed, so that a large enough space can be reserved for the placement of the support legs 3, and the interference can be avoided.
Referring to fig. 2 and fig. 7 to 10, in the embodiment of the present invention, the connecting rod assembly 2 includes a first connecting rod 21 and a second connecting rod 22 movably hinged on the first connecting rod 21, two ends of the first connecting rod 21 are respectively and correspondingly rotatably mounted on the first support 11 and the second support 12, and one end of the second connecting rod 22 away from the first connecting rod 21 is connected to the locking shaft 4. That is, when the leg 3 pushes the second support 12 and the first pedal 13 to laterally deflect toward the first support 11, one end of the first connecting rod 21 mounted on the second support 12 can be deflected upward around the first support 11 following the second support 12, and one end of the second connecting rod 22 far away from the first connecting rod 21 can also be deflected upward under the driving of the first connecting rod 21, so that the locking shaft 4 connected with the second connecting rod 22 can move upward in the locking through hole 71 until the locking shaft 4 extends out of the running board of the frame 7 and abuts against the leg 3. In addition, can also move towards the direction of keeping away from first support 11 through pulling second support 12 to make folding stair 1 open, when folding stair 1 opened, link assembly 2 can drive locking axle 4 and carry out descending motion in locking through-hole 71, and simultaneously, locking axle 4 has partial structure always to be in locking through-hole 71 even when descending extreme position.
Specifically, the hinge point of the second link 22 on the first link 21 is located at a position between two mounting points of the first link 21 on the first mount 11 and the second mount 12, and the hinge point of the second link 22 on the first link 21 is disposed close to the mounting point of the first link 21 on the first mount 11.
Referring to fig. 12, in the embodiment of the present invention, the lower end of the leg 3 is provided with the stopper 31 into which the upper end of the locking shaft 4 is inserted, corresponding to the locking through hole 71, so that the stability of locking can be further ensured.
Referring to fig. 7 to 10 again, in the embodiment of the present invention, the first connecting rod 21 is rotatably mounted on the first support 11 through the first connecting shaft 24, the second connecting rod 22 is connected with the locking shaft 4 through the second connecting shaft 25, the connecting rod assembly 2 further includes an elastic member 23, and two ends of the elastic member 23 are respectively disposed on the first connecting shaft 24 and the second connecting shaft 25 in a one-to-one correspondence manner. When the foldable stair 1 is folded and unfolded, the first connecting rod 21 can be arranged horizontally, the second connecting rod 22 is arranged obliquely to the first connecting rod 21 under the gravity action of the locking shaft 4, one end of the second connecting rod 22 far away from the first connecting rod 21 is positioned below the first connecting rod 21, and the second pull rod and the elastic piece 23 jointly act on the second connecting shaft 25 to support the locking shaft 4; when the folding stair 1 is folded and closed, the first connecting rod 21 can be vertically arranged, one end, far away from the first connecting rod 21, of the second connecting rod 22 is lifted, and the second pull rod and the elastic piece 23 jointly act on the second connecting shaft 25 to continuously and stably support the locking shaft 4. Specifically, the elastic member 23 may be a spring.
In the embodiment of the present invention, the first connecting rod 21 may also be rotatably mounted on the second support 12 through a third connecting shaft 26, and the second connecting rod 22 is movably hinged to the first connecting rod 21 through a fourth connecting shaft 27.
In the embodiment of the present invention, the second support 12 includes a first mounting rod 121 extending obliquely, a first mounting bracket 122 disposed on the first mounting rod 121 and located below the first mounting rod 121, and a supporting rod 124 extending and bending downward from an upper end of the first mounting rod 121, the first step 13 is mounted on the first mounting bracket 122, and an end of the supporting rod 124 away from the first mounting rod 121 is used for abutting against an upper end surface of the frame 7 when the collapsible stairway 1 is collapsed and unfolded. That is, when the collapsible stairway 1 is folded and unfolded, the free end of the support rod 124 away from the first mounting rod 121 abuts against the upper end face of the platform of the carriage 7, so that the platform of the carriage 7 can stably support the collapsible stairway 1 which is folded and unfolded.
Specifically, first support 11 includes second mounting rod 111 that extends obliquely and second mounting bracket 112 that is disposed on second mounting rod 111 and is located above second mounting rod 111, the upper end of second mounting rod 111 is mounted on the platform of frame 7, second mounting bracket 112 is disposed opposite to first mounting bracket 122, and the end of first pedal 13 that is away from first mounting bracket 122 is rotatably mounted on second mounting bracket 112. That is, the first mounting rod 121 may be disposed in opposite parallel to the second mounting rod 111, and the first mounting rod 121 is always positioned above the second mounting rod 111.
More specifically, the second mounting rod 111 is provided with a first fixing block 113, the first connecting rod 21 is rotatably mounted on the first fixing block 113 through the first connecting shaft 24, the first mounting bracket 122 is provided with a second fixing block 123, and the first connecting rod 21 is rotatably mounted on the second fixing block 123 through the third connecting shaft 26.
In the embodiment of the present invention, the support rod 124 is provided with a guide wheel 125 extending outward. Namely, the support legs 3 abut against the guide wheels 125 when retracted, so that the collapsible stairway 1 can be driven to perform the collapsing and closing operation.
In addition, a stair handrail 14 can be further arranged on the second support 12, and the stair handrail 14 can help people to go up and down stairs, so that the falling phenomenon is avoided, and the humanized design is better met. In the prior art, the fixed stair generally cannot be provided with the stair handrail 14 in order to avoid the interference phenomenon. More specifically, the stair railing 14 is disposed on the first mounting bar 121 of the second support 12.
In the embodiment of the present invention, the first pedal 13 includes a plate body and two rotating shafts 131 respectively disposed at two ends of the plate body, and the two rotating shafts 131 are respectively rotatably disposed on the first support 11 and the second support 12 in a one-to-one correspondence manner, so that the first pedal 13 can perform a lateral deflecting motion toward the first support 11 along with the second support 12. Further, two rotating shafts 131 are rotatably provided on the second mounting rack 112 of the first support 11 and the first mounting rack 122 of the second support 12 in a one-to-one correspondence, and at least two first treads 13 are provided, and at least two first treads 13 are sequentially arranged at intervals in the up-down direction of the collapsible stair 1.
As shown in fig. 11 and 12, in the embodiment of the present invention, the collapsible stairway 1 includes the telescopic folding mechanism 5 for being oppositely disposed on the frame 7 at an interval and the second step 6 mounted on the two telescopic folding mechanisms 5, and the driving rod 53 is disposed on the telescopic folding mechanism 5 located at the outer side of the collapsible stairway 1 in the two telescopic folding mechanisms 5, and the driving rod 53 is configured to abut against the support leg 3 to fold the collapsible stairway 1 upwards. Can take place the butt with actuating lever 53 when landing leg 3 withdraws promptly to drive flexible folding mechanism 5 through actuating lever 53 and upwards contract foldingly, so that whole folding stair 1 upwards folds and closes, thereby can vacate enough big space for putting of landing leg 3, avoid taking place to interfere.
Referring to fig. 11 to 13, in the embodiment of the present invention, the telescopic folding mechanism 5 includes a first hinge rod 51 and a second hinge rod 52, the first hinge rod 51 is disposed in parallel with the second pedal 6, the previous second hinge rod 52 and the next second hinge rod 52 are disposed in parallel to form a diamond hinge, the second hinge rods 52 of the two telescopic folding mechanisms 5 disposed near the frame 7 are both provided with sliding slots 54 along the length direction, and two ends of the link assembly 2 are slidably mounted in the sliding slots 54 of the two telescopic folding mechanisms 5 in a one-to-one correspondence manner. When the telescopic folding mechanism 5 is folded upwards, the two ends of the connecting rod assembly 2 can move along the sliding grooves 54, and the locking shaft 4 connected with the connecting rod assembly 2 is enabled to move upwards, so that the walking plate extending out of the frame 7 from the locking through hole 71 can abut against the supporting leg 3. Further, the connecting rod assembly 2 includes a connecting rod body and a sliding portion provided at an end of the connecting rod body and movably installed in the sliding groove 54.
Specifically, the number of the second steps 6 is at least two, and the number of the diamond-shaped hinges in the telescopic folding mechanism 5 is at least one. Meanwhile, the length of the first hinge rod 51 is equal to the width of the second pedal 6, two lengths of the second hinge rods 52 may exist, the lengths of the second hinge rods 52 at the front end and the rear end of the telescopic folding mechanism 5 are equal to the width of the second pedal 6, the length of the middle second hinge rod 52 is twice the width of the second pedal 6, when the length of the second hinge rod 52 is set to be twice the width of the second pedal 6, the upper half of the second hinge rod 52 becomes a part of the previous diamond-shaped hinge, and the lower half of the second hinge rod 52 becomes a part of the next diamond-shaped hinge. In addition, the length of the second hinge rod 52 provided near the frame 7 of the outer telescopic folding mechanism 5 may be twice as long as the width of the step, and the upper half of the second hinge rod 52 may be provided as the driving rod 53 to be able to abut against the leg 3 when the leg is retracted, so as to drive the folding stair 1 to perform the upward folding closing operation.
In the embodiment of the present invention, the driving rod 53 of the leg 3 corresponding to the second hinge rod 52 is provided with a wedge, and the wedge is low in front and high in back, that is, the wedge can gradually press down the second hinge rod 52. Of course the invention is not limited thereto and instead of wedge blocks, other telescopic hold-downs may be provided on the legs 3.
In order to achieve the above object, the present invention provides a work vehicle, wherein the work vehicle comprises a stair folding and leg locking linkage according to the above. Since the engineering vehicle adopts all the technical solutions of the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A linkage device for stair folding and supporting leg locking is characterized in that the linkage device for stair folding and supporting leg locking comprises:
the folding stair (1) is arranged on the frame (7) in a foldable and closable manner;
the support legs (3) can be abutted against the folding stairs (1) when in retraction movement and drive the folding stairs (1) to perform folding closing movement; and
the linkage locking mechanism (8) is arranged on the folding stair (1) and can lock the supporting legs (3) under the driving of the folding closing motion of the folding stair (1).
2. The linkage device for stair folding and leg locking according to claim 1, wherein the linkage locking mechanism (8) comprises a connecting rod assembly (2) arranged on the folding stair (1) and a locking shaft (4) connected with the connecting rod assembly (2), the locking shaft (4) is arranged corresponding to a locking through hole (71) formed in the frame (7), and the connecting rod assembly (2) is used for linking with the folding closing movement of the folding stair (1) so as to drive the locking shaft (4) to extend out of the frame (7) from the locking through hole (71) and abut against the leg (3).
3. The stair folding and leg locking linkage according to claim 2, characterized in that the folding stair (1) comprises a first seat (11) for fixed arrangement on the frame (7), a first tread (13) laterally deflectable arranged on the first seat (11), and a second seat (12) connected to the first tread (13), the second seat (12) being located outside the folding stair (1) and being adapted to abut against the leg (3) for lateral folding closure of the folding stair (1) towards the first seat (11).
4. The linkage device for stair folding and leg locking according to claim 3, wherein the connecting rod assembly (2) comprises a first connecting rod (21) and a second connecting rod (22) movably hinged to the first connecting rod (21), two ends of the first connecting rod (21) are respectively rotatably mounted on the first support (11) and the second support (12) in a one-to-one correspondence manner, and one end of the second connecting rod (22) far away from the first connecting rod (21) is connected with the locking shaft (4).
5. The stair folding and leg locking linkage according to claim 4, characterized in that said first link (21) is rotatably mounted on said first support (11) by means of a first connecting shaft (24), said second link (22) is connected to said locking shaft (4) by means of a second connecting shaft (25), said linkage assembly (2) further comprises an elastic member (23), two ends of said elastic member (23) are respectively disposed on said first connecting shaft (24) and said second connecting shaft (25) in a one-to-one correspondence.
6. The stair folding and leg locking linkage according to claim 3, wherein the second support (12) comprises a first mounting rod (121) extending obliquely, a first mounting frame (122) arranged on the first mounting rod (121) and located below the first mounting rod (121), and a support rod (124) extending from the upper end of the first mounting rod (121) and bent downward, the first pedal (13) is mounted on the first mounting frame (122), and one end of the support rod (124) far away from the first mounting rod (121) is used for abutting against the upper end face of the frame (7) when the folding stair (1) is folded and unfolded.
7. The stair folding and leg locking linkage according to claim 3, wherein the first step (13) comprises a plate body and two rotating shafts (131) respectively arranged at two ends of the plate body, and the two rotating shafts (131) are respectively rotatably arranged on the first support (11) and the second support (12) in a one-to-one correspondence manner.
8. The stair folding and leg locking linkage according to claim 2, wherein the folding stair (1) comprises two telescopic folding mechanisms (5) arranged on the frame (7) at a relative interval and a second pedal (6) mounted on the two telescopic folding mechanisms (5), a driving rod (53) is arranged on the telescopic folding mechanism (5) on the outer side of the folding stair (1) in the two telescopic folding mechanisms (5), and the driving rod (53) is used for abutting against the leg (3) so as to enable the folding stair (1) to be folded upwards and closed.
9. The linkage device for stair folding and leg locking according to claim 8, wherein the telescopic folding mechanism (5) comprises a first hinge rod (51) and a second hinge rod (52), the first hinge rod (51) and the second pedal (6) are arranged in parallel relatively, the previous second hinge rod (52) and the next second hinge rod (52) are arranged in parallel relatively to form a diamond-shaped hinge, sliding grooves (54) are formed in the second hinge rods (52) of the two telescopic folding mechanisms (5) close to the frame (7) along the length direction, and two ends of the connecting rod assembly (2) are slidably mounted in the sliding grooves (54) of the two telescopic folding mechanisms (5) in a one-to-one correspondence manner.
10. A work vehicle, characterized in that it comprises a stair fold and leg lock linkage according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330807.6A CN114684024B (en) | 2022-03-30 | 2022-03-30 | Linkage device for folding stairs and locking supporting legs and engineering vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330807.6A CN114684024B (en) | 2022-03-30 | 2022-03-30 | Linkage device for folding stairs and locking supporting legs and engineering vehicle |
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| Publication Number | Publication Date |
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| CN114684024A true CN114684024A (en) | 2022-07-01 |
| CN114684024B CN114684024B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210330807.6A Active CN114684024B (en) | 2022-03-30 | 2022-03-30 | Linkage device for folding stairs and locking supporting legs and engineering vehicle |
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| CN (1) | CN114684024B (en) |
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|---|---|
| CN114684024B (en) | 2024-02-09 |
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