WO2020107684A1

WO2020107684A1 - Step structure and work vehicle

Info

Publication number: WO2020107684A1
Application number: PCT/CN2019/072158
Authority: WO
Inventors: 赵斌; 王国宝; 张勇
Original assignee: 徐工集团工程机械有限公司
Priority date: 2018-11-30
Filing date: 2019-01-17
Publication date: 2020-06-04
Also published as: CN109334574B; RU2746967C1; CN109334574A

Abstract

Disclosed are a step structure and a work vehicle. A step device comprises: fixing frames (10); pedal frames (20) hingedly connected to the fixing frames (10) and capable of flipping towards the side away from the fixing frames (10) to unfold and flipping towards the side close to the fixing frames (10) to close; and at least two step structures (30) provided on the step frames (20) and capable of unfolding along with the unfolding of the step frames (20) and collapsing along with the closing of the step frames (20). The step structure occupies a small space and is easy to use.

Description

Pedal structure and working vehicle

Cross-reference of related applications

This application is based on the application with the CN application number 201811448172.X and the application date is November 30, 2018, and claims its priority. The disclosure content of the CN application is hereby incorporated into this application as a whole.

Technical field

The present disclosure relates to work equipment components, and in particular, to a pedal structure and a work vehicle.

Background technique

The existing national standard GB7956.1 for fire-fighting and rescue vehicles requires that the height of the standing pedal of the personnel accessing the equipment should be no more than 450mm. However, the off-road or heavy-duty rescue fire trucks in the related art usually use large-diameter tires or chassis with a large ground clearance, resulting in a high ground clearance of equipment above the rear axle tires. For this type of rescue fire truck, the first-order flip pedal structure of the related art cannot achieve the access to equipment at a higher position directly above the tire, while some other two-step pedal structures that need to be manually turned over or are transitioned by the pedals on both sides of the tire All the structures have the problems of time-consuming, labor-intensive and large space occupation.

Summary of the invention

In view of this, the embodiments of the present disclosure provide a pedal structure and working equipment, which can make the pedal structure occupy a small space and be easy to use.

In one aspect of the present disclosure, a pedal structure is provided, including:

Fixed bracket

The pedal bracket is hinged with the fixed bracket, and can be flipped out to the side away from the fixed bracket, and folded and folded toward the side close to the fixed bracket; and

At least a two-step pedal structure is provided on the pedal bracket, and can be unfolded as the pedal bracket is unfolded and folded as the pedal bracket is folded.

In some embodiments, the pedal device further includes:

A flip lever, one end is hinged to the fixed bracket, and the other end is slidingly connected to the pedal bracket; and

A driving mechanism is connected to the flip lever, and is used to drive the flip lever to rotate relative to the fixed bracket, so as to realize the flip of the pedal bracket, and change the other of the flip lever during the rotation of the flip lever One end slide position on the pedal bracket.

In some embodiments, the other end of the flip lever is provided with a pulley, and the pedal bracket is provided with a chute that matches the movement stroke of the pulley.

In some embodiments, the pedal device further includes:

The mechanical linkage mechanism is connected to the other end of the flip lever and the at least two-step pedal structure, and is used to drive the at least two step pedal structure to expand or fold when the other end of the flip lever changes the sliding position.

In some embodiments, the first-step pedal in the at least two-step pedal structure is hinged with the pedal bracket, and the mechanical linkage mechanism includes:

A first-order flip link, one end is hinged to the first-step pedal, and the other end is hinged to the other end of the flip lever; and

A limit link, one end of which is hinged to the pedal bracket, and the other end is directly or indirectly connected to other pedals of more than two steps in the at least two-step pedal structure;

Wherein, the first-step flip link is configured to drive the first-step pedal to flip relative to the pedal bracket when the other end of the flip lever slides away from the fixed bracket, and the limit connection The lever is configured to limit the range of motion of the other pedals of at least two of the at least two-step pedals when the first-step pedal is overturned, so that the other of the at least two-step pedals is at least one of the first-step pedals The pedal is folded.

In some embodiments, the at least two-step pedal structure includes: a first-step pedal and other pedals of more than two steps. The first-step pedal and other pedals of more than two steps are connected by a parallelogram linkage group to The synchronous expansion and synchronous folding of the at least two-step pedal structure are described.

In some embodiments, the parallelogram linkage group includes: at least one first direction linkage and at least two second direction linkages, the at least one first direction linkage is disposed parallel to the first-step pedal , The at least two second direction links are parallel to each other, and are hinged between the first-step pedal and the at least one first direction link.

In some embodiments, the other pedals above the second level are respectively fixed to the at least one first direction link.

In some embodiments, the other pedals above the second step are respectively slidingly connected to the at least one first direction link, and at least at least one pedal between the first step and the other pedals above the second step are respectively provided. One sliding link, one end of each sliding link in the at least one sliding link is respectively connected to the other pedals of the second or higher order, and the other end is connected to the at least two second direction links Relative to the pedal connected to the sliding link, the portion closer to the first-step pedal.

In some embodiments, the other pedals above the second order include: a second order pedal and a third order pedal, and the parallelogram linkage group includes two first direction links and three second direction links, the The two first direction links are parallel to the first-order pedal, and are respectively slidingly connected to the second-order pedal and the third-order pedal, and the three second-direction links are parallel to each other and are hinged to the first-order pedal Between the two first-direction links, a first sliding link is also provided between the second-step pedal and the first-step pedal, and one end of the first sliding link is connected to the Connected to the second-step pedal, the other end of the three second-direction links is closer to the first-step pedal than the second-step pedal, and between the third-step pedal and the second-step pedal A second sliding link is provided. One end of the second sliding link is connected to the third-step pedal, and the other end is closer to the three second-direction links relative to the third-step pedal. Describe the position of the first-step pedal.

In some embodiments, the at least one sliding link is configured to align the other pedals above the second stage on the side close to the pedal bracket when the pedal bracket is collapsed.

In some embodiments, the at least one first direction link is provided with slide grooves, which can be respectively in sliding engagement with the lateral edges of the other pedals of the second or more steps.

In some embodiments, the drive mechanism includes a piston cylinder.

In one aspect of the present disclosure, a work vehicle is provided, including a vehicle body, wheels, and the aforementioned pedal device.

In some embodiments, the fixing bracket of the pedal device is disposed on the side of the vehicle body and is located on both sides of the outer periphery of the wheel. The pedal bracket and at least two-step pedal structure of the pedal device are located at On the axially outer side of the wheel, when the pedal bracket is folded, the at least two-step pedal structure is folded over the outer periphery of the wheel.

In some embodiments, the work vehicle is a rescue fire truck.

Therefore, according to an embodiment of the present disclosure, by providing a reversible pedal bracket and at least a two-step pedal structure, the operator can deploy the pedal bracket around the fixed bracket when using the pedal, and at least the two-step pedal structure can follow the pedal The bracket expands and expands to facilitate the operator's use, and when the pedal is not needed, the pedal bracket can be folded around the fixed bracket to the side of the fixed bracket, and at least the two-step pedal structure can be folded with the pedal bracket And fold to reduce the space occupied by the pedal structure.

BRIEF DESCRIPTION

The drawings constituting a part of the description describe the embodiments of the present disclosure, and together with the description are used to explain the principles of the present disclosure.

Referring to the drawings, the present disclosure can be more clearly understood from the following detailed description, in which:

FIG. 1 is a schematic diagram of a stereoscopic structure in a deployed state according to some embodiments of the pedal structure of the present disclosure;

2 is a schematic structural view of a side view of a pedal structure according to some embodiments of the present disclosure in a deployed state;

3 is a schematic structural view of an intermediate state between a deployed state and a collapsed state according to some embodiments of the pedal structure of the present disclosure;

4 is a schematic structural view of a side view of a pedal structure according to some embodiments of the present disclosure in a collapsed state;

FIG. 5 is a schematic perspective structural view of some embodiments of the pedal structure of the present disclosure in a collapsed state;

6 is a schematic perspective structural view of a pedal vehicle in a deployed state according to some embodiments of a work vehicle of the present disclosure;

FIG. 7 is a schematic perspective structural view of a pedal vehicle in a collapsed state according to some embodiments of a work vehicle of the present disclosure.

It should be understood that the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals indicate the same or similar components.

detailed description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the drawings. The description of the exemplary embodiments is merely illustrative, and in no way serves as any limitation to the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These examples are provided to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that the relative arrangement of components and steps set forth in these embodiments should be interpreted as exemplary only, and not as limitations, unless specifically stated otherwise.

The terms “first”, “second” and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. Similar words such as "include" or "include" mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of covering other elements. "Up", "down", "left", "right", etc. are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

In the present disclosure, when it is described that a specific device is located between the first device and the second device, there may or may not be an intervening device between the specific device and the first device or the second device. When it is described that a specific device is connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be directly connected to the other device without an intervening device.

All terms (including technical or scientific terms) used in the present disclosure have the same meaning as understood by those of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, general dictionaries should be interpreted as having meanings consistent with their meanings in the context of related technologies, and should not be interpreted using idealized or extremely formal meanings unless explicitly stated here Defined like this.

Techniques, methods and equipment known to those of ordinary skill in the related art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the specification.

As shown in FIG. 1, it is a schematic diagram of a stereoscopic structure in a deployed state according to some embodiments of the pedal structure of the present disclosure. Referring to FIGS. 1 and 2 to 5, in some embodiments, the pedal device includes: a fixed bracket 10, a pedal bracket 20, and at least a two-step pedal structure 30. The fixed bracket 10 may include at least one bracket body for fixed or position-adjustable connection with a fixed object (such as a building) or a moving object (such as a car, boat, etc.) to which the pedal device needs to be installed. In FIG. 1, the fixed bracket includes two bracket bodies, and at least the two-step pedal structure 30 is located between the two bracket bodies. In other embodiments, the fixed bracket may include only one bracket body, or more than three bracket bodies.

The pedal bracket 20 is hinged with the fixed bracket 10, and can be flipped out to the side away from the fixed bracket 10, and folded and folded toward the side close to the fixed bracket 10. The hinge point of the pedal bracket 20 and the fixed bracket 10 may be provided at the lower end of the fixed bracket 10, so that the pedal bracket 20 can be deployed to a lower position when deployed, so as to realize the use of the pedal at a lower position. Referring to FIG. 1, the pedal bracket 20 may be an integral type, that is, the pedal bracket 20 as a whole, and both ends are respectively hinged with the bracket bodies on the left and right sides of the fixed bracket 10. In other embodiments, the pedal bracket 20 may also be a split type, that is, the pedal bracket 20 includes more than two pedal bracket bodies, each of which is hinged with the bracket body in the corresponding fixed bracket 10.

At least a two-step pedal structure 30 is provided on the pedal bracket 20, and can be expanded with the deployment of the pedal bracket 20 and folded with the folding of the pedal bracket 20. In this way, the pedal bracket 20 can not only support the at least two-step pedal structure 30, but also realize the expansion or folding of the pedal bracket 20 with its own movement, thereby simplifying the operation of the pedal structure by the operator. In addition, the folded pedal structure 30 takes up less space, which can improve the passability of the corresponding equipment for installing the pedal device and reduce or avoid interference with other structures.

The turning operation of the pedal bracket 20 relative to the fixed bracket 10 can be manually performed by an operator. Referring to FIGS. 1-6, in order to improve efficiency and reduce manpower consumption, in some embodiments, the pedal device further includes: a flip lever 50 and a driving mechanism 40. One end of the flip lever 50 is hinged with the fixed bracket 10, and the other end is slidingly connected with the pedal bracket 20. The sliding connection can be realized by a matching structure of a pulley chute, for example, a pulley is provided at the other end of the flip lever 50, and a chute matching the movement stroke of the pulley is provided on the pedal bracket 20. In other embodiments, the matching structure of the slide rail and the slider may also be provided.

The driving mechanism 40 is connected to the flip lever 50 and can be used to drive the flip lever 50 to rotate relative to the fixed bracket 10 to achieve the flip of the pedal bracket 20 and change the position during the rotation of the flip lever 50. The sliding position of the other end of the flip lever 50 on the pedal bracket 20. The driving mechanism 40 may take various forms, such as the piston-cylinder method in FIG. 2, or a method that directly drives the turning lever 50 to rotate about its hinge point with the fixed bracket 10 by using a motor or a hydraulic motor.

In FIG. 2, one end of the piston cylinder is hinged to the upper end of the fixed bracket 10, and is away from the position of the pedal bracket 20 relative to the hinge point of the flip lever 50 and the fixed bracket 10. The other end of the piston cylinder may be hinged on the turning lever 50, for example, on the axial midpoint of the turning lever 50. In this way, when the cylinder rod of the piston cylinder is extended or retracted, the pedal bracket 20 can be driven to turn by turning the lever 50. The piston cylinder can be hydraulic or pneumatic, which can carry a certain weight, so as to not only realize the driving of the flip lever, but also carry the weight of the pedal bracket, the pedal structure and the person standing on the pedal structure. On the other hand, the deployment structure realized by the piston cylinder has a larger stroke magnification ratio, which can achieve rapid deployment and folding.

In order to achieve a linkage relationship between the pedal bracket 20 and the at least two-step pedal structure 30, in some embodiments, a mechanical linkage mechanism may be further included in the pedal device. The mechanical linkage mechanism may be connected to the other end of the flip lever 50 and the at least two-step pedal structure 30 for driving the at least two step pedal structure 30 to expand or change when the other end of the flip lever 50 changes the sliding position fold. The mechanical linkage mechanism is relatively reliable, and there is no need to configure complicated control logic. In other embodiments, a non-mechanical linkage mechanism may also be used, for example, to achieve the linkage relationship between the two by means of acousto-optic electromagnetic, etc., to meet the requirements of more working conditions.

Referring to FIGS. 2 and 3, in some embodiments, the at least two-step pedal structure 30 includes: a first-step pedal 31 and other pedals with more than two steps. In the pedal deployed state, the first-step pedal 31 is located at the lowermost side of the at least two-step pedal structure 30. The other pedals above the second step are the other pedals in the at least two-step pedal structure 30 except for the first-step pedal 31. In FIG. 2, the pedal structure has a three-step pedal, and the other pedals above the second step are the second-step pedal 32 and the third-step pedal 33.

In FIG. 3, the first-step pedal 31 is hinged with the pedal bracket 20, and the hinge point H2 may be provided on an end of the pedal bracket 20 away from the hinge point H1 with the fixed bracket 10. The mechanical linkage mechanism may include: a first-order flip link 61 and a limit link 62. One end of the first-step flip link 61 is hinged with the first-step pedal 31 (hinge point H3), and the other end is hinged with the other end of the flip lever 50. One end of the limiting link 62 is hinged with the pedal bracket 20, and the other end is directly or indirectly connected with other pedals of at least two steps in the at least two-step pedal structure 30.

The first-step flip link 61 can drive the first-step pedal 31 to flip relative to the pedal bracket 20 when the other end of the flip lever 50 slides away from the fixed bracket 10. The first-step pedal 31 can be unfolded relative to the pedal bracket 20 around the hinge point H2.

The limit link 62 may limit the range of motion of the other pedals of the at least two-step pedals that are above the second level when the first-step pedal 31 is turned over, so that The first-step pedal 31 is folded. In FIG. 3, the other end of the limit link 62 is connected to the first direction link connected to the second-step pedal 32, or connected to the first direction link connected to the third-step pedal 33, or directly connected to the second order The pedal 32 or the third step pedal 33 is connected. The limiting link 62 can make the pedals fold onto the first-step pedal 31 in sequence by limiting the movement range of at least two-step pedals of at least two-step pedals.

In order to realize the stable linkage of each step pedal during movement, the first step pedal 31 and the other pedals above the second step can be connected by a parallelogram linkage group, so as to realize the synchronous deployment of the at least two step pedal structure 30 and Synchronous folding. 2 and 3, in some embodiments, the parallelogram linkage group may include: at least one

first direction link

71, 72 and at least two second direction links 73, 74, 75, the at least one The first direction links 71, 72 are arranged parallel to the first-step pedal 31, the at least two second direction links 73, 74, 75 are parallel to each other, and are hinged to the first-step pedal 31 and the at least Between a

first direction link

71, 72.

In some embodiments, the other pedals of the second or higher order may be fixed to the at least one

first direction link

71, 72 respectively. In this way, other pedals of more than two steps can be unfolded or folded with the movement of the first direction links 71, 72.

Referring to FIGS. 1-3, in some embodiments, other pedals with more than two steps may be slidingly connected to the at least one

first direction link

71, 72, respectively. At least one sliding link is also provided between the first-step pedal 31 and the other pedals of the second-step or higher, one end of each sliding link in the at least one sliding link is respectively connected to the second-step The above other pedals are respectively connected, and the other end is connected to the at least two second direction links 73, 74, 75, which are closer to the first-step pedal 31 than the pedal connected to the sliding link. For example, slide grooves are provided on the at least one

first direction link

71 and 72, and these slide grooves can be slidingly engaged with the lateral edges of the other pedals of the second or higher steps, respectively.

When the distance between the first-step pedal 31 and at least one

first direction link

71, 72 and at least one

first direction link

71, 72 changes, the sliding link can drive the connected pedal along The slide direction of the first direction connecting rod moves outward or moves inward. In this way, on the one hand, the position of each step of the pedal after the pedal structure is deployed can be more reasonable, and on the other hand, the space occupation in the direction perpendicular to the pedal bracket 20 after the pedal is folded can be reduced.

In FIG. 3, the other pedals above the second order include: the second pedal 32 and the third pedal 33. The parallelogram link group includes two first direction links 71, 72 and three second direction links 73, 74, 75. The two first direction links 71, 72 are parallel to the first-step pedal 31, and are slidingly connected to the second-step pedal 32 and the third-step pedal 33, respectively. The three second direction links 73, 74, 75 are parallel to each other, and are hinged between the first step pedal 31 and the two first direction links 71, 72, respectively.

A first sliding link 81 is also provided between the second-step pedal 32 and the first-step pedal 31. One end of the first sliding link 81 is connected to the second-step pedal 32, and the other end is closer to the three second-

direction links

73, 74, 75 relative to the second-step pedal 32. The position of the first-step pedal 31. A second sliding link 82 is also provided between the third-step pedal 33 and the second-step pedal 32. One end of the second sliding link 82 is connected to the third-step pedal 33, and the other end is closer to the three second-

direction links

73, 74, 75 relative to the third-step pedal 33. The position of the first-step pedal 31.

Referring to FIG. 4, at least one sliding link can align the other pedals of the second order or more on the side close to the pedal bracket 20 when the pedal bracket 20 is folded. This can effectively reduce the space occupation in the direction perpendicular to the pedal bracket 20 after the pedal is folded, and it is more neat and beautiful.

4 and 5 show schematic diagrams of the pedal structure of the pedal device in the folded state. At this time, the pedal bracket may be slightly longer in length than the size of the fixed bracket, and this part of the height can accommodate the folded pedal structure.

The above-mentioned pedal device can be applied to a work vehicle for an operator to stand and work, or to obtain an object at a higher position through the pedal. Accordingly, the present disclosure also provides a work vehicle including any of the aforementioned pedal devices.

As shown in FIG. 6, it is a schematic view of a stereoscopic structure in which a pedal structure is in a deployed state according to some embodiments of a work vehicle of the present disclosure. 6 and 7, the work vehicle includes a vehicle body 91, wheels 92, and the aforementioned pedal device. The fixing bracket 10 of the pedal device may be provided at various positions of the vehicle body, for example, under the cab, the rear of the vehicle, the body of the vehicle, and the like.

In some embodiments, the fixed bracket 10 of the pedal device may be disposed on the side of the vehicle body 91 and located on both sides of the outer periphery of the wheel 92. The pedal bracket 20 and at least two-step pedal structure 30 of the pedal device are located axially outside of the wheel 92 when deployed (already shown in FIG. 6 ). When the pedal bracket 20 is folded, the at least two-step pedal structure 30 is folded over the outer periphery of the wheel 92 (already shown in FIG. 7 ).

Through the arrangement of the above-mentioned pedal device, on the one hand, the multi-step pedal structure can be deployed at a fixed step interval to achieve a lower ground clearance, meet the standard requirements, and enable the operator to obtain high-level position At this time, the multi-step pedal structure deployed at this time will not interfere with the wheels. On the other hand, the folded pedal structure can be folded over the tires of the wheels, occupying less space, and it is not easy to adversely affect the appearance of the work vehicle.

The work vehicle of the present disclosure may be various engineering work vehicles or special work vehicles. For example, the work vehicle is a rescue fire truck, and such work vehicle has high requirements for timeliness in rescue. Through the pedal structure embodiment of the present disclosure, the operations of rescuers can be simplified, the work efficiency can be improved, the rescuers can easily obtain the rescue equipment at a higher position above the tire, and the physical effort spent by the rescuers on the disposal of the pedal structure can also be saved.

So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

A pedal device, including:

Fixed bracket (10);

The pedal bracket (20) is hinged with the fixed bracket (10), and can be flipped out to the side away from the fixed bracket (10), and folded and folded toward the side close to the fixed bracket (10); and

At least a two-step pedal structure (30) is provided on the pedal bracket (20), and can be unfolded as the pedal bracket (20) is unfolded and folded as the pedal bracket (20) is folded.
The pedal device according to claim 1, further comprising:

A flip lever (50), one end is hinged with the fixed bracket (10), and the other end is slidingly connected with the pedal bracket (20); and

A driving mechanism (40) is connected to the turning lever (50), and is used to drive the turning lever (50) to rotate relative to the fixed bracket (10) to realize the turning of the pedal bracket (20), and During the rotation of the flip lever (50), the sliding position of the other end of the flip lever (50) on the pedal bracket (20) is changed.
The pedal device according to claim 2, wherein the other end of the turning lever (50) is provided with a pulley, and the pedal bracket (20) is provided with a chute that matches the movement stroke of the pulley.
The pedal device according to claim 2, further comprising:

A mechanical linkage mechanism is connected to the other end of the flip lever (50) and the at least two-step pedal structure (30) for driving the at least two when the other end of the flip lever (50) changes the sliding position The stepped pedal structure (30) is unfolded or folded.
The pedal device according to claim 4, wherein the first-step pedal (31) in the at least two-step pedal structure (30) is hinged with the pedal bracket (20), and the mechanical linkage mechanism includes:

A first order flip link (61), one end is hinged to the first step pedal (31), and the other end is hinged to the other end of the flip lever (50); and

A limit link (62), one end of which is hinged to the pedal bracket (20), and the other end is directly or indirectly connected to other pedals of at least two steps in the at least two-step pedal structure (30);

Wherein, the first-step flip link (61) is configured to drive the first-step pedal (31) relative to each other when the other end of the flip rod (50) slides away from the fixed bracket (10) side When the pedal bracket (20) is turned over, the limit link (62) is configured to limit the range of motion of the other pedals of the at least two steps above the second step when the first step pedal (31) is turned over , So that the other pedals of two or more of the at least two-step pedals are folded toward the first-step pedal (31).
The pedal device according to claim 1, wherein the at least two-step pedal structure (30) includes: a first-step pedal (31) and other pedals of more than two steps, a first-step pedal (31) and more than two steps The other pedals are connected by a parallelogram connecting rod group to realize the synchronous expansion and synchronous folding of the at least two-step pedal structure (30).
The pedal device according to claim 6, wherein the parallelogram link group includes: at least one first direction link (71, 72) and at least two second direction links (73, 74, 75), The at least one first direction link (71, 72) is arranged parallel to the first-step pedal (31), and the at least two second direction links (73, 74, 75) are parallel to each other and are hinged at Between the first step pedal (31) and the at least one first direction link (71, 72).
The pedal device according to claim 7, wherein the other pedals of the second or higher order are fixed to the at least one first direction link (71, 72) one by one.
The pedal device according to claim 7, wherein the other pedals above the second order are slidingly connected to the at least one first direction link (71, 72) one by one, at the first stage pedal (31) At least one sliding link is further provided between the other pedals above the second level, and one end of each sliding link in the at least one sliding link is respectively connected to the other pedals above the second level, The other end is connected to the portion of the at least two second direction links (73, 74, 75) closer to the first-step pedal (31) relative to the pedal connected to the sliding link.
The pedal device according to claim 6, wherein the other pedals above the second order include: a second order pedal (32) and a third order pedal (33), and the parallelogram linkage group includes two first direction links Levers (71, 72) and three second direction links (73, 74, 75), the two first direction links (71, 72) are parallel to the first-step pedal (31), and are respectively Slidingly connected with the second step pedal (32) and the third step pedal (33), the three second direction links (73, 74, 75) are parallel to each other, and are hinged to the first step pedal (31) and all Between the two first direction links (71, 72), a first sliding link (81) is also provided between the second-step pedal (32) and the first-step pedal (31). One end of the first sliding link (81) is connected to the second-step pedal (32), and the other end is connected to the three second-direction links (73, 74, 75) relative to the second-step pedal (32) A portion closer to the first-step pedal (31), and a second sliding link (82) is provided between the third-step pedal (33) and the second-step pedal (32), so One end of the second sliding link (82) is connected to the third step pedal (33), and the other end is connected to the three second direction links (73, 74, 75) relative to the third step pedal (33) The part closer to the first step pedal (31).
The pedal device according to claim 9, wherein the at least one sliding link is configured to bring the other pedals of the second or higher order closer to the pedal bracket when the pedal bracket (20) is collapsed Align one side of (20).
The pedal device according to claim 9, wherein the at least one first direction link (71, 72) is provided with slide grooves, which can be separated from the lateral outer edges of the other pedals of the second or higher order Slide fit.
The pedal device according to claim 2, wherein the driving mechanism includes a piston cylinder (40).
A work vehicle comprising a vehicle body (91), wheels (92) and the pedal device according to any one of claims 1 to 13.
The work vehicle according to claim 14, wherein the fixing bracket (10) of the pedal device is provided on the side of the vehicle body (91) and on both sides of the outer periphery of the wheel (92), the pedal The pedal bracket (20) and at least two-step pedal structure (30) of the device are located axially outside of the wheel (92) when deployed, and the at least two-step pedal structure when the pedal bracket (20) is folded (30) Fold over the outer periphery of the wheel (92).
The work vehicle according to claim 14, wherein the work vehicle is a rescue fire truck.