A foldable screed plate and a paver

Abstract

The application discloses a foldable pedal of a screed and a paver, and the foldable pedal of the screed comprises a screed frame and a plurality of pedals, wherein one end of each of the plurality of pedals is hinged to the screed frame, and the plurality of pedals and the screed frame form a multi-pendulum four-bar mechanism, one of the pedals is a driving pendulum, and the remaining pedals are passive pendulums, and the driving pedal is used for driving the passive pendulums to turn over. The foldable pedal of the screed and the paver, the plurality of pedals and the screed frame form the multi-pendulum four-bar mechanism, one of the pedals is the driving pendulum, and the remaining pedals are the passive pendulums, so that the plurality of pedals can be quickly folded, and the transport size of the pedals in the length direction can be effectively reduced after being folded.

Description

Technical Field

[0001] This invention relates to a foldable screed and a paver, belonging to the field of road construction machinery technology. Background Technology

[0002] Provided it doesn't exceed the weight limit, the more equipment a user transports at once, the lower the transportation cost. This means that, all other things being equal, the smaller the product's transport size, the stronger its competitiveness.

[0003] It is evident that, in order to effectively reduce the transport length of the screed and paver when the screed pedal is folded, thereby reducing transport dimensions and enhancing product competitiveness, there is an urgent need for a screed with foldable pedals and a paver. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a foldable screed board and a paver. Multiple screed boards and the screed board frame form a multi-swing four-bar mechanism, in which one screed board is an active swing arm and the remaining screed boards are passive swing arms. This mechanism enables the rapid folding of multiple screed boards and effectively reduces the transport size of the screed boards in the length direction after folding.

[0005] To achieve the above objectives / to solve the above technical problems, the present invention is implemented using the following technical solution:

[0006] In a first aspect, the present invention provides a foldable footrest for an ironing board, comprising an ironing board frame and a plurality of footrests, wherein...

[0007] One end of each of the multiple pedals is hinged to the ironing board frame, forming a multi-bar four-bar mechanism with the ironing board frame. One pedal is the active bar, and the remaining pedals are the passive bars. The active pedal is used to drive the passive bars to flip.

[0008] Furthermore, the multiple pedals include pedal one and pedal two, with pedal two disposed on the side of pedal one. Pedal one is an active rocker arm, and pedal two is a passive rocker arm. Pedal one and pedal two are linked together by a component.

[0009] The side of the ironing board frame is fixed with a hinge shaft, and the end of the hinge shaft away from the ironing board frame is provided with a threaded hole. The second pedal is hinged to the ironing board frame by fastening screws and a pressure plate.

[0010] The ironing board frame has concentric holes on its side for hinges. The pedal is hinged to the ironing board frame by bolts and nuts, wherein the bolts serve as hinge axes.

[0011] Furthermore, the pedal includes a pedal surface, a shock-absorbing pad, and a pair of reinforcing plates. The pedal surface is fixed between two reinforcing plates, one on the left and one on the right. A shock-absorbing pad is installed on the side of the reinforcing plate near the ironing board frame. A round hole for hinge is opened at the end of the reinforcing plate away from the pedal surface.

[0012] Furthermore, the second pedal includes a bracket, reinforcing ribs, and a hollowed-out pedal surface, wherein,

[0013] The bracket has a circular hole for hinged connection, which is used to connect the hollow pedal surface and the ironing board frame.

[0014] The reinforcing rib is fixed to the side of the bracket away from the ironing board frame and is connected to the hollowed-out pedal surface.

[0015] Furthermore, the component for linkage includes a sliding shaft and a sliding groove, wherein the sliding groove is in the shape of an oblong hole.

[0016] The slide groove is formed on the bracket of pedal two. The sliding shaft is fixed to the side of pedal one facing pedal two, and the sliding shaft is inserted into the slide groove and slides in the slide groove when flipped.

[0017] Furthermore, the component for linkage includes a sliding shaft and a sliding groove, wherein the sliding groove is in the shape of an oblong hole.

[0018] The slide groove is opened on one side of the pedal one, and the sliding shaft is fixed on the pedal two. The sliding shaft is inserted into the slide groove and slides in the slide groove when flipped.

[0019] Furthermore, the first pedal, the second pedal, and the ironing board frame satisfy the following relationship:

[0020] L AC sin(α / 2) = L BC sin(β / 2)

[0021] L AC ·cos(α / 2)=L AB +L BC ·cos(β / 2)

[0022] L≥L AB +L BC

[0023] (L-L1)^ 2 ≤L AB ^ 2 +L BC ^ 2 L-L1>0

[0024] in:

[0025] Point A is the hinge point between the second pedal and the ironing board frame;

[0026] Point B is the hinge point between the pedal and the ironing board frame;

[0027] Point C is the fixed point of the sliding shaft on pedal one when the working state is in operation;

[0028] Point C2 is the fixed point of the sliding shaft on pedal one when in the transportation state;

[0029] L AB The distance from point A to point B;

[0030] L BC The distance from point B to point C;

[0031] L AC The distance from point A to point C;

[0032] L is the distance from point A to the center of the far end of the chute;

[0033] L1 is the distance between the centers of the two ends of the groove;

[0034] α = ∠CAC², β = ∠CBC²;

[0035] Furthermore, L AB =L BC , at this time β=2α; and β=180°, α=90°.

[0036] Furthermore, the first pedal, the second pedal, and the ironing board frame satisfy the following relationship:

[0037] L AC sin(α / 2) = L BC sin(β / 2)

[0038] L AC ·cos(α / 2)=L AB +L BC ·cos(β / 2)

[0039] L^ 2 ≥L AC ^ 2 -L AB ^ 2

[0040] 0 <L-L1≤L AC -L AB

[0041] in:

[0042] Point A is the hinge point between the second pedal and the ironing board frame;

[0043] Point B is the hinge point between the pedal and the ironing board frame;

[0044] Point C is the fixed point of the sliding shaft on pedal two when the working state is in operation;

[0045] Point C is the fixed point of the sliding shaft on pedal two when in the transportation state;

[0046] L AB The distance from point A to point B;

[0047] L AC The distance from point A to point C;

[0048] L BC The distance from point B to point C;

[0049] L is the distance from point B to the center of the far end of the chute;

[0050] L1 is the distance between the centers of the two ends of the groove;

[0051] α = ∠CAC², β = ∠CBC².

[0052] Furthermore, it also includes:

[0053] L AC ^ 2 =2·L AB ^ 2 ; β=180°, α=90°.

[0054] In a second aspect, the present invention provides a paver including the screed and foldable pedal described in the first aspect.

[0055] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0056] The ironing board provided by this invention has a foldable pedal. Multiple pedals and the ironing board frame form a multi-bar four-bar mechanism. One pedal is an active bar and the remaining pedals are passive bars. This mechanism enables the rapid folding of multiple pedals and effectively reduces the transport size of the pedals in the length direction after folding.

[0057] The paver provided by this invention has a foldable pedal that can be adapted to the above-mentioned screed, making it convenient to use. When the pedal is folded, it can effectively reduce the transport size of the paver in the length direction, thereby improving the transport convenience and product competitiveness of the paver. Attached Figure Description

[0058] Figure 1 This is a simplified diagram of the foldable pedal mechanism in Embodiment 1;

[0059] Figure 2 This is a schematic diagram of the dimensions of the second slide groove of the pedal in Embodiment 1;

[0060] Figure 3This is a schematic diagram of the geometric relationship of the double-pendulum four-bar linkage in Example 1;

[0061] Figure 4 This is a structural diagram of the pedal in Example 1;

[0062] Figure 5 This is a structural diagram of pedal two in Example 1;

[0063] Figure 6 This is a magnified view of the foldable pedal assembly and a portion thereof, as shown in Embodiment 1.

[0064] Figure 7 This is a schematic diagram of the folding pedal in Example 1.

[0065] Figure 8 This is a simplified diagram of the foldable pedal mechanism in Embodiment 2;

[0066] Figure 9 This is a schematic diagram of the dimensions of the pedal groove in Embodiment 2;

[0067] Figure 10 This is a schematic diagram of the geometric relationship of the double-pendulum four-bar linkage in Example 2;

[0068] Figure 11 This is a simplified diagram of the mechanism in Example 3.

[0069] In the diagram: 1. Pedal 1; 101. Rib plate; 102. Sliding shaft; 103. Shock-absorbing pad; 104. Pedal surface; 2. Pedal 2; 201. Bracket; 202. Reinforcing rib; 203. Hollowed-out pedal surface; 3. Ironing board frame; 4. Fastening screw; 5. Pressure plate; 6. Bolt; 7. Nut. Detailed Implementation

[0070] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0071] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0072] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0073] like Figure 1 As shown, this embodiment provides a foldable footrest for an ironing board, including an ironing board frame 3 and multiple footrests, wherein...

[0074] One end of each of the multiple pedals is hinged to the ironing board frame 3, forming a multi-bar four-bar mechanism with the ironing board frame 3. One of the pedals is the active bar, and the remaining pedals are the passive bars. The active pedal is used to drive the passive bars to flip.

[0075] To achieve coordination between multiple pedals, the multiple pedals include pedal 1 and pedal 2. Pedal 2 is disposed on the side of pedal 1. Pedal 1 is an active swing arm, and pedal 2 is a passive swing arm. Pedal 1 and pedal 2 are linked together by components.

[0076] The side of the ironing board frame 3 is fixed with a hinge shaft. The end of the hinge shaft away from the ironing board frame 3 is provided with a threaded hole. The second pedal 2 is hinged to the ironing board frame 3 by fastening screws 4 and pressure plate 5.

[0077] The side of the ironing board frame 3 is provided with concentric holes for hinge. The pedal 1 is hinged to the ironing board frame 3 by bolts 6 and nuts 7, wherein bolts 6 serve as hinge axes.

[0078] like Figure 4 As shown, the pedal 1 includes a pedal surface 104, a shock-absorbing pad 103 and a pair of stiffeners 101. The pedal surface 104 is fixed between two stiffeners 101, one on the left and one on the right. The shock-absorbing pad 103 is installed on the side of the stiffener 101 near the ironing board frame 3. A round hole for hinge is opened at the end of the stiffener 101 away from the pedal surface 104.

[0079] like Figure 5 As shown, the second pedal 2 includes a bracket 201, a reinforcing rib 202, and a hollowed-out pedal surface 203, wherein,

[0080] The bracket 201 has a round hole for hinge connection, which is used to connect the hollow pedal surface 203 and the ironing board frame 3.

[0081] The reinforcing rib 202 is fixed to the side of the bracket 201 away from the ironing board frame 3 and is connected to the hollowed-out pedal surface 203.

[0082] In this embodiment, the component used for linkage can be implemented using the following scheme:

[0083] like Figure 1-7 As shown, it includes a sliding shaft 102 and a groove, wherein the groove is an oblong hole shape, wherein,

[0084] The groove is formed on the bracket 201 of the pedal 2. The sliding shaft 102 is fixed to the side of the pedal 1 facing the pedal 2, and the sliding shaft 102 is inserted into the groove and slides in the groove when flipped. In this embodiment, the sliding shaft 102 has a threaded hole on the side facing the pedal 2. The pedal 2 is connected to the sliding shaft 102 by fastening screws 4 and pressure plate 5 to restrict the movement of the pedal 2 in its axial direction.

[0085] In this embodiment, the pedal 1, pedal 2, and ironing board frame 3 satisfy the following relationship:

[0086] L AC sin(α / 2) = L BC sin(β / 2)

[0087] L AC ·cos(α / 2)=L AB +L BC ·cos(β / 2)

[0088] L≥L AB +L BC

[0089] (L-L1)^ 2 ≤L AB ^ 2 +LBC ^ 2 L-L1>0

[0090] in:

[0091] Point A is the hinge point between the second pedal 2 and the ironing board frame 3;

[0092] Point B is the hinge point between the pedal 1 and the ironing board frame 3;

[0093] When point C is in the working state, the fixed point of the sliding shaft 102 on pedal 1;

[0094] When point C2 is in the transport state, the fixed point of the sliding shaft 102 on pedal 1;

[0095] L AB The distance from point A to point B;

[0096] L BC The distance from point B to point C;

[0097] L AC The distance from point A to point C;

[0098] L is the distance from point A to the center of the far end of the chute;

[0099] L1 is the distance between the centers of the two ends of the groove;

[0100] α = ∠CAC², β = ∠CBC²;

[0101] Among them, L AB =L BC , at this time β=2α; and β=180°, α=90°.

[0102] In this embodiment, to simplify the structure, the sliding shaft 102 is preferably in the form of a sliding shaft 102, but it can also be replaced by a rotatable roller hinged to the pedal 1.

[0103] In this embodiment, during operation, the pedal surfaces 104 of both pedal 1 and pedal 2 are horizontal and facing upwards; during transport, the pedal surface 104 of pedal 1 is horizontal and facing downwards; the pedal surface 104 of pedal 2 is vertical and facing the ironing board frame 3.

[0104] In this embodiment, when switching from the working state to the transportation state, the pedal 1 rotates upward by 180°, causing the pedal 2 to rotate upward by 90°, so that the pedal folds upward and reduces the transportation size; when switching from the transportation state to the working state, the pedal 1 rotates downward by 180°, causing the pedal 2 to rotate downward by 90°, and the pedal is lowered. Example 2

[0105] Based on Embodiment 1, the components used for linkage in this embodiment can also be implemented using the following schemes:

[0106] like Figure 8-10 As shown, it includes a sliding shaft 102 and a groove, wherein the groove is an oblong hole shape, wherein,

[0107] The slide groove is opened on one side of the pedal 1, and the sliding shaft 102 is fixed on the pedal 2. The sliding shaft 102 is inserted into the slide groove and slides in the slide groove when flipped.

[0108] In this embodiment, the pedal 1, pedal 2, and ironing board frame 3 satisfy the following relationship:

[0109] L AC sin(α / 2) = L BC sin(β / 2)

[0110] L AC ·cos(α / 2)=L AB +L BC ·cos(β / 2)

[0111] L^ 2 ≥L AC ^ 2 -L AB ^ 2

[0112] 0 <L-L1≤L AC -L AB

[0113] in:

[0114] Point A is the hinge point between the second pedal 2 and the ironing board frame 3;

[0115] Point B is the hinge point between the pedal 1 and the ironing board frame 3;

[0116] Point C is the fixed point of the sliding shaft 102 on pedal 2 when the working state is active;

[0117] When point C2 is in the transport state, the fixed point of the sliding shaft 102 on the pedal 2;

[0118] L AB The distance from point A to point B;

[0119] L AC The distance from point A to point C;

[0120] L BC The distance from point B to point C;

[0121] L is the distance from point B to the center of the far end of the chute;

[0122] L1 is the distance between the centers of the two ends of the groove;

[0123] α = ∠CAC², β = ∠CBC².

[0124] In this embodiment, to simplify the structure, the sliding shaft 102 is preferably in the form of a sliding shaft 102, but it can also be replaced by a rotatable roller hinged to the pedal 1.

[0125] In this embodiment, during operation, the pedal surfaces 104 of both pedal 1 and pedal 2 are horizontal and facing upwards; during transport, the pedal surface 104 of pedal 1 is horizontal and facing downwards; the pedal surface 104 of pedal 2 is vertical and facing the ironing board frame 3.

[0126] In this embodiment, when switching from the working state to the transportation state, the pedal 1 rotates upward by 180°, causing the pedal 2 to rotate upward by 90°, so that the pedal folds upward and reduces the transportation size; when switching from the transportation state to the working state, the pedal 1 rotates downward by 180°, causing the pedal 2 to rotate downward by 90°, and the pedal is lowered.

[0127] In the above technical solution:

[0128] L AC ^ 2 =2·L AB ^ 2 ; β=180°, α=90°. Example 3

[0129] like Figure 11 As shown, this embodiment provides another foldable pedal for the ironing board. It modifies the double-bar four-bar mechanism provided in Embodiment 1 by adding a new four-bar mechanism, upgrading the two-stage pedal of Embodiment 1 to a three-stage pedal. Multi-stage pedals (three stages or more) can be achieved by modifying Embodiments 1 and 2 through the addition of multi-bar mechanisms; these modifications will not be elaborated upon in this embodiment. These improvements and modifications should also be considered as preferred embodiments and implementations within the scope of protection of this invention, playing a crucial role in fully disclosing the technical solution, understanding and reproducing the invention, and supporting and interpreting the claims. Example 4

[0130] This embodiment provides a paver with a foldable pedal that can be adapted to the screed provided in any of the embodiments one to three. This makes it convenient to use. When the pedal is folded, it can effectively reduce the transport size of the paver in the length direction, thereby improving the transport convenience and product competitiveness of the paver.

[0131] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A foldable step for a screed, characterized in that The invention relates to a folding flat iron, comprising a flat iron frame (3) and a plurality of pedals, wherein, one end of the plurality of pedals is hinged to the flat iron frame (3) to form a plurality of swing link four-bar mechanisms with the flat iron frame (3), one of the pedals is a driving swing link, and the remaining pedals are passive swing links, the driving pedal is used to drive the passive swing links to flip over; the plurality of pedals comprises a first pedal (1) and a second pedal (2), the second pedal (2) is arranged on the side of the first pedal (1), the first pedal (1) is the driving swing link, and the second pedal (2) is the passive swing link, the first pedal (1) and the second pedal (2) are connected through an assembly; the side of the flat iron frame (3) is fixed with a hinge shaft, a threaded hole is formed in the end of the hinge shaft away from the flat iron frame (3), the second pedal (2) is hinged to the flat iron frame (3) through a fastening screw (4) and a pressing plate (5); the side of the flat iron frame (3) is provided with a concentric hole for hinging, the first pedal (1) is hinged to the flat iron frame (3) through a bolt (6) and a nut (7), wherein the bolt (6) serves as the hinge shaft; the first pedal (1) comprises a pedal surface (104), a damping pad (103) and a pair of rib plates (101), the pedal surface (104) is fixed between the left and right rib plates (101), the damping pad (103) is arranged on the side of the rib plate (101) close to the flat iron frame (3), and a round hole for hinging is formed in the end of the rib plate (101) away from the pedal surface (104).

2. The foldable step plate of claim 1, wherein, the second pedal (2) comprises a bracket (201), a reinforcing rib (202) and a hollow pedal surface (203), wherein, a round hole for hinging is formed in the bracket (201) to connect the hollow pedal surface (203) and the flat iron frame (3); the reinforcing rib (202) is fixed to the side of the bracket (201) away from the flat iron frame (3) and connected with the hollow pedal surface (203).

3. The foldable step of a screed according to claim 2, wherein the assembly for connection comprises a sliding shaft (102) and a sliding groove, the sliding groove is in the shape of a waist-shaped hole, wherein, the sliding groove is formed in the bracket (201) of the second pedal (2), the sliding shaft (102) is fixed to the side of the first pedal (1) facing the second pedal (2), and the sliding shaft (102) is inserted into the sliding groove and slides in the sliding groove when flipping over.

4. The folding pedal of the flat iron according to claim 3, wherein the first pedal (1), the second pedal (2) and the flat iron frame (3) satisfy the following relationship: L AC • sin(a / 2) = L BC • sin(β / 2) L AC • cos(a / 2) = L AB + L BC • cos(b / 2) L ≥ L AB + L BC (L - L1) 2 ≤ L AB ^ 2 + L BC ^ 2 , L - L1> 0 wherein: A is the hinge point of the second pedal (2) and the flat iron frame (3); B is the hinge point of the first pedal (1) and the flat iron frame (3); C is the fixed point of the sliding shaft (102) on the first pedal (1) in the working state; C2 is the fixed point of the sliding shaft (102) on the first pedal (1) in the transportation state; L AB is the distance from point A to point B; L BC is the distance from point B to point C; L AC is the distance from point A to point C; L is the distance from A to the center of the far end of the sliding groove; L1 is the distance between the centers of the two ends of the sliding groove; a = ∠CAC2, β = ∠CBC 2。 5. The foldable step of a screed according to claim 4, wherein, The L AB = L BC At this time, β = 2α; and β = 180°, α = 90°.

6. The foldable step plate of claim 2, wherein, the assembly for connection comprises a sliding shaft (102) and a sliding groove, the sliding groove is in the shape of a waist-shaped hole, wherein, The sliding slot is arranged on one side of the first pedal (1), the sliding shaft (102) is fixed on the second pedal (2), and the sliding shaft (102) is inserted into the sliding slot and slides in the sliding slot during the turning.

7. The foldable step of a screed according to claim 6, wherein The first pedal (1), the second pedal (2) and the ironing plate frame (3) satisfy the following relationship: L AC • sin(a / 2) = L BC • sin(β / 2) L AC • cos(a / 2) = L AB + L BC • cos(b / 2) L 2 ≥L AC ^ 2 -L AB ^ 2 0 < L - L1 < L AC -L AB Wherein: A point is the hinge point of the second pedal (2) and the ironing plate frame (3); B point is the hinge point of the first pedal (1) and the ironing plate frame (3); C point is the fixed point of the sliding shaft (102) on the second pedal (2) in the working state; C2 point is the fixed point of the sliding shaft (102) on the second pedal (2) in the transportation state; L AB is the distance from point A to point B; L AC is the distance from point A to point C; L BC is the distance from point B to point C; L is the distance from B point to the center of the far end of the sliding slot; L1 is the distance between the centers of the two ends of the sliding slot; Alpha = ∠CAC2, beta = ∠CBC2.

8. The foldable step of a screed according to claim 7, wherein, Further comprising: L AC ^ 2 =2·L AB ^ 2 ; β = 180°, α = 90°.

9. A paving machine characterized by, The ironing plate with the foldable pedal according to any one of claims 1-8.

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