Concrete paving device capable of freely adjusting width

Abstract

The utility model relates to the field of concrete equipment, in particular to a concrete paving device capable of freely adjusting the width. When an existing concrete paving device is used for adjusting the width of a single side, the width adjustment is limited by the single-circle lead of lead screw transmission, a lead screw needs to be rotated for multiple circles for width adjustment, and the operation time consumption is long; and secondly, when the double-side asymmetric width adjustment is carried out, the rotation operation of two lead screws needs to be frequently switched, so that the adjustment efficiency is low. A concrete paving device capable of freely adjusting the width comprises a fixing seat and the like. The fixed seat is axially arranged and fixed on an external concrete mixer, and two clamping pieces which are staggered up and down are arranged in the rotating seat. The rotating seat drives the left moving rod, the clamping teeth, the toothed bar and the adjusting arm located below to swing leftwards or rightwards, the adjusting arm located below swings leftwards or rightwards to drive the external concrete limiting piece to swing leftwards or rightwards, and then the paving width of the left side of the concrete paving device is increased or decreased.

Description

Technical Field

[0001] This utility model relates to the field of concrete equipment, and in particular to a concrete paving device with adjustable width. Background Technology

[0002] In infrastructure construction projects such as roads and bridges, the cross-sectional width of construction sections often exhibits dynamic changes due to functional requirements. Taking urban road construction as an example, at-grade intersections, turning lanes and traffic islands need to be added, and the road surface width is usually 20%-30% wider than the standard road section. Concrete paving equipment needs flexible dynamic width adjustment capabilities during paving. Current concrete paving equipment consists of an adjustment unit, a transmission unit, and two limiting plates. The adjustment unit and transmission unit are connected by two sliders. The two limiting plates are generally laid on both sides of the equipment's forward direction to limit the concrete movement. Under the force-saving transmission action of the transmission unit, the rotation of the adjustment unit can control the movement of the two limiting plates in real time, thereby limiting the range of concrete paving.

[0003] Currently, the adjustment unit of mainstream concrete paving equipment is integrated into the operating platform above the middle of the paving equipment, and generally adopts a double-screw synchronous adjustment mechanism. When the worker is on the operating platform, he rotates the double screws to move the moving blocks on the double screws and the two sliders on the transmission unit, which facilitates the worker to adjust the width on both sides synchronously while the equipment is running. However, the existing adjustment method has exposed significant defects in construction scenarios with dynamic widening or narrowing. When adjusting the width on one side, due to the single-turn lead of the screw drive, the width adjustment requires rotating the screws multiple times, which is time-consuming. At the same time, when performing asymmetrical width adjustment on both sides, it is necessary to frequently switch the rotation operation of the two screws to achieve the transmission characteristics of small strokes with multiple rotations, resulting in low adjustment efficiency and extended construction time in the transition zone where the concrete paving width gradually changes. Utility Model Content

[0004] To overcome the shortcomings of existing concrete paving devices, which are limited by the single-turn lead of screw drives, requiring multiple turns of the screw for width adjustment, resulting in poor adjustment efficiency and frequent switching between the rotation of the two screws, further reducing adjustment efficiency, this invention provides a concrete paving device that uses coaxial drive of two different swing arms to achieve a motion conversion of small-angle rotation to large-stroke output, thereby improving adjustment efficiency.

[0005] The technical solution of this utility model is: a concrete paving device with adjustable width, characterized in that: it includes a fixed seat, a rotating seat, a connector and an adjusting arm, the rotating seat and the fixed seat rotate coaxially relative to each other, the two adjusting arms are coaxially connected to the sliding groove of the fixed seat in layers, one end of the unlockable connector is located in the rotating seat, and the other end is connected to the adjusting arm, the connector converts the rotational force of the rotating seat into the swinging force of the two adjusting arms.

[0006] The unlockable connector includes a snap-fit ​​element and a toothed rod. The snap-fit ​​element is located on the upper part of the rotating seat. One end of the toothed rod is connected to the adjusting arm, and the other end is connected to the snap-fit ​​element. The toothed rod transmits rotational force by snapping into the snap-fit ​​element.

[0007] The connector consists of two sets, which are coaxially layered to facilitate gripping and applying force.

[0008] The locking component includes a movable rod and locking teeth, which are disposed on the rotating seat and connected. The movable rod controls the locking of the locking teeth with the toothed rod through the telescopic movement of the rotating seat.

[0009] The snap-fit ​​component includes snap-fit ​​teeth, and the snap-fit ​​teeth are engaged with the toothed rod by meshing with tooth blocks.

[0010] The groove between the fixed seat and the rotating seat is an annular T-shaped groove, which keeps the rotating seat in a limited position.

[0011] It also includes a lifting assembly and an arc-shaped limiting strip. The lifting assembly is axially disposed within the rotating seat. The arc-shaped limiting strip is located between the sliding groove between the fixed seat and the rotating seat and is slidably hinged to the lifting assembly. The lifting assembly converts the centripetal force of the snap-fit ​​member into a vertical lifting force. The limiting cavity consists of a recess in the upper part of the fixed seat and a circular groove in the lower part of the rotating seat.

[0012] The fixed seat has several arc-shaped slots on its recessed side, and the rotating seat has two arc-shaped slots on its inner wall. The lifting assembly includes a locking rod, one end of which is fixed to the central rod, and the other end is slidably hinged to the arc-shaped limiting strip.

[0013] The beneficial effects of this utility model are as follows: 1. By rotating the seat, the left moving rod, the locking tooth, the toothed rod, and the adjusting arm below swing to the left or right. The swinging of the adjusting arm below to the left or right will drive the external concrete limiting component to the left or right, thereby increasing or decreasing the paving width on the left side of the concrete paving device. At the same time, the rotating seat can be rotated slightly around the fixed seat as the center point, so that the adjusting arm below can significantly drive the external concrete limiting component to expand or decrease the paving range on the left side, making the width adjustment more convenient.

[0014] 2. Even if the rotating seat drives the right or left locking teeth to rotate to the maximum extent to the left or right, the teeth of the right or left locking teeth will always fall within the meshing range of the upper or lower locking bar. This allows for the second type of width adjustment without having to rotate the rotating seat back to its original position, reducing the reset time, speeding up the second type of right-side adjustment, and improving the convenience and efficiency of the width adjustment.

[0015] 3. Under the reset action of the compression spring, the central rod axis resets downward, causing the two locking rods to pull the arc-shaped limiting strips to reset. The lower part of the two arc-shaped limiting strips resets and re-locks into two of the arc-shaped slots of the fixed seat, thus limiting and locking the fixed seat and the movable seat. In other words, the locking and releasing functions are completed in the process of gripping and releasing any lever, further improving the efficiency of width adjustment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the fixed base, rotating base, moving rod, and adjusting arm of this utility model.

[0017] Figure 2 This is a cross-sectional perspective view of the fixed base and rotating base of this utility model.

[0018] Figure 3 This is a cross-sectional three-dimensional structural diagram of the rotating seat of this utility model.

[0019] Figure 4 This is a partial three-dimensional structural diagram of the fixing base and the central rod of this utility model.

[0020] In the attached diagram, the following are the reference numerals: 1. Fixed seat; 2. Rotating seat; 3. Moving rod; 4. Holding rod; 5. Clamping tooth; 6. Telescopic spring; 7. Toothed rod; 8. Adjusting arm; 9. Center rod; 10. Fixed head; 11. Wedge plate; 111. Compression spring; 12. Clamping rod; 13. Arc-shaped limiting strip. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0022] Example 1:

[0023] like Figure 1-4As shown, this embodiment proposes a freely adjustable concrete paving device, which mainly replaces the existing double-screw adjustment part in concrete paving devices. Two adjusting arms 8 replace the moving blocks of the double screw and are connected to the two sliders of the transmission part. Specifically, it includes a fixed seat 1 and a rotating seat 2. The fixed seat 1 is axially fixed to an external concrete mixer, and the upper transverse diameter of the fixed seat 1 is larger than the lower transverse diameter. The rotating seat 2 has a rotating cavity at its lower part that matches the upper part of the fixed seat 1. The upper part of the fixed seat 1 is connected to the... The lower inner side of the rotating seat 2 is rotatably connected through the rotating cavity on the rotating seat 2. The rotating seat 2 is provided with two interlocking snap-fit ​​pieces inside, and the lower part of the two snap-fit ​​pieces is provided with snap-fit ​​pieces. The outer side of the fixed seat 1 is rotatably connected with two vertically arranged adjusting arms 8. The lower part of the two snap-fit ​​pieces is connected to the two adjusting arms 8 respectively. When any snap-fit ​​piece is subjected to a centripetal gripping force, it will disengage from the snap-fit ​​piece on the same side, so that when the rotating seat 2 rotates axially, the snap-fit ​​piece on the other side widens the adjusting arm 8.

[0024] The snap-fit ​​component includes a movable rod 3, a grip rod 4, and a telescopic spring 6. The rotating seat 2 has two movable slots that are opened vertically inside. The two movable slots of the rotating seat 2 also have receiving slots on the side that are close to each other. The two movable rods 3 are slidably connected to the two movable slots of the rotating seat 2. The two grip rods 4 are fixed to the upper part of the two movable rods 3 respectively. The telescopic spring 6 is placed in the two receiving slots of the rotating seat 2. The two ends of the telescopic spring 6 are respectively connected to the centripetal side of the receiving slot of the rotating seat 2 and the centripetal side of the movable rod 3 on the same side.

[0025] The snap-fit ​​component includes two snap teeth 5 and two toothed rods 7. The two snap teeth 5 are respectively fixedly connected to the lower parts of the two moving rods 3, and the lower parts of the two toothed rods 7 are respectively fixedly connected to the outer sides of the two adjusting arms 8. The upper inner sides of the two toothed rods 7 are toothed and mesh with the snap teeth 5.

[0026] refer to Figures 1-4It is understood that this application pertains to the adjustment and control components in a concrete paving device. In actual use, this application can be divided into three scenarios, specifically two: the second is the reverse operation of the first, and the third is a combination of the first and second. When the right adjustment arm 8 is used to adjust the right width and the left adjustment arm 8 is used to adjust the left width, the specific process for left adjustment in the first scenario is as follows: The user places their palm against the upper part of the rotating seat 2, grips the lever 4 located on the upper part of the rotating seat 2 with their fingers, and pulls it forcefully towards the palm. The lever 4 on the right side of the rotating seat 2 drives the right side to move... The moving rod 3 and the right-side locking tooth 5 move inward along the movable groove of the rotating seat 2. The right-side telescopic spring 6 is compressed, and the right-side locking tooth 5 disengages from the right-side gear 7, allowing the right-side gear 7 and the upper adjusting arm 8 to be in a free state. However, under the pushing force of the left-side compression spring on the left-side moving rod 3 and the left-side locking tooth 5, the left-side locking tooth 5 and the left-side gear 7 remain engaged, making the left-side locking tooth 5, the left-side gear 7, and the lower adjusting arm 8 essentially a single unit. Then, the user rotates the rotating seat 2 to the left or right, causing the left-side moving rod 3 to move. The toothed 5, toothed rod 7, and lower adjusting arm 8 swing left or right. This left or right swing of the lower adjusting arm 8 causes the external concrete limiting component to swing left or right, thereby increasing or decreasing the paving width on the left side of the concrete paving device. Simultaneously, the rotating seat 2 can be rotated slightly around the fixed seat 1, causing the lower adjusting arm 8 to significantly expand or shrink the paving range on the left side by moving the external concrete limiting component. This makes width adjustment more convenient, thus solving the significant defects exposed in construction scenarios with dynamic widening or narrowing, and addressing the limitation of single-sided width adjustment due to the wire. The single-turn lead of the lever drive requires multiple turns of the lead screw for width adjustment, which is time-consuming. At the same time, when performing asymmetrical width adjustment on both sides, it is necessary to frequently switch the rotation of the two lead screws to achieve the transmission characteristics of small stroke through multiple turns, resulting in low adjustment efficiency. This leads to a longer construction time in the transition zone where the concrete paving width gradually changes. After adjusting to the appropriate width, the user releases his / her hands from the rotating seat 2 and the right grip 4. The right grip 4, the right moving rod 3, and the right locking tooth 5 are reset under the action of the right telescopic spring 6, and the right locking tooth 5 re-engages with the toothed rod 7 above.

[0027] refer to Figure 2It can be seen that after the first left-side adjustment, even if the rotating seat 2 drives the right-side tooth 5 or the left-side tooth 5 to rotate to the maximum extent to the left or right, the tooth block of the right-side tooth 5 or the left-side tooth 5 will always fall within the meshing range of the upper tooth 7 or the lower tooth 7. This allows for the second-side width adjustment without having to rotate and reset the rotating seat 2, reducing the reset time and speeding up the second-side right-side adjustment process. It can also drive two different swing arms, and a dual-screw synchronous adjustment mechanism is commonly used. This mechanism integrates the adjustment ends of the two screws into the upper operating platform in the middle of the paving device, facilitating synchronous width adjustment on both sides by workers during equipment operation. However, existing adjustment methods reveal significant shortcomings in construction scenarios involving dynamic widening or narrowing. When adjusting the width on one side, the single-turn lead of the screw drive limits the width adjustment to multiple turns of the screw, resulting in a long operation time. Simultaneously, when performing asymmetrical width adjustment on both sides, it is necessary to frequently switch the rotation operations of the two screws to achieve a small-stroke transmission characteristic through multiple turns, leading to low adjustment efficiency and prolonged construction time in the transition zone where the concrete paving width gradually changes. Under the action of the right-side telescopic spring 6, the right-side locking tooth 5 re-engages with the right-side toothed rod 7. When performing the second type of right-side adjustment, the steps and principles are the same as in the first type, except that the moving parts are the left-side gripping rod 4, the moving rod 3, and the locking tooth 5. The left-side locking tooth 5 disengages from the left-side toothed rod 7, and the rotating seat 2 drives the right-side gripping rod 4, the moving rod 3, the locking tooth 5, the toothed rod 7, and the upper adjusting arm 8 to the left or right to adjust the right-side width.

[0028] The third situation mentioned above is a combination of the first left adjustment situation and the second right adjustment situation. In the process of these two adjustment situations, some similar adjustments currently exist that require a reset or angle adjustment after a condition is met in order to adjust for the second situation. Therefore, as mentioned in embodiment 1, even if the rotating seat 2 drives the right side tooth 5 or the left side tooth 5 to rotate to the left or right to the maximum extent, the tooth block of the right side tooth 5 or the left side tooth 5 always falls within the meshing range of the upper tooth bar 7 or the lower tooth bar 7. Under this structural premise, this application can quickly perform the second right adjustment situation in the first left adjustment situation. The difference is that the user's grip position is at different positions above and below the rotating part. This is different from the case where the grip bar 4 is set on both sides at the same position. The staggered arrangement makes it more convenient for the user to grip and apply force when adjusting on one side.

[0029] Example 2: Based on Example 1, such as Figures 3-4As shown, it also includes a central rod 9, a fixed head 10, a wedge plate 11, a compression spring 111, a locking rod 12, and an arc-shaped limiting strip 13. The rotating seat 2 has a vertical groove at its center, two horizontal grooves, and a circular groove at its bottom. The circular groove communicates with the rotating cavity on the rotating seat 2. The central rod 9 is located in the vertical groove at the center of the rotating seat 2. Two fixed heads 10 are fixedly connected to one side of the central rod 9 in an up-down arrangement. Wedge plates 11 are fixedly connected to the sides of the two moving rods 3 that are close to each other. The two wedge plates 11 are respectively located in the two horizontal grooves of the rotating seat 2. The compression spring 111 is connected between the top of the central rod 9 and the vertical groove of the movable seat. Two limiting members are provided at the bottom of the central rod 9. The axial movement of the central rod 9 causes the two limiting members to rotate at a certain angle, thus limiting the fixed seat 1 and the rotating seat 2.

[0030] The two fixing heads 10 are parallel to the protrusions of the two wedge plates 11, respectively.

[0031] The limiting component includes a locking rod 12 and an arc-shaped limiting strip 13. The upper center of the fixed base 1 has a downward-facing recess, and the side of the recess of the fixed base 1 has several arc-shaped locking grooves. The inner side of the circular groove of the rotating part has two symmetrical arc-shaped sliding grooves. The lower two sides of the central rod 9 are fixedly connected to the locking rods 12. The arc-shaped limiting strip 13 is fitted between two symmetrical arc-shaped locking grooves of the recess of the fixed base 1 and two symmetrical arc-shaped sliding grooves on the circular groove of the rotating part. The two arc-shaped limiting strips 13 each have a slot in the middle, and the slots of the two arc-shaped limiting strips 13 are slidably connected to the two locking rods 12 respectively.

[0032] refer to Figure 3 and Figure 4It is known that in actual use, the limiting part is generally operated before and after concrete paving adjustment. Before adjustment, operating the limiting part loosens the limiting part to facilitate subsequent adjustment, while after adjustment, operating the limiting part tightens the limiting part to ensure the stability of the adjusted state. In one adjustment process, the user needs to operate the limiting part twice. In the third case, where both sides need to be quickly adjusted, if the limiting part is not tightened before each adjustment and is operated after multiple adjustments, the adjusted side is prone to loosening, resulting in the adjusted width not meeting the requirements. However, frequent operation of the limiting part is too troublesome. In this embodiment 2 of the present application, the movement of any moving rod 3 towards the center of the movable seat can drive the wedge plate 11 on it to move. The wedge plate 11 on it will squeeze the fixed head 10 at the same level through the protrusion, causing the central rod 9 axis to move upward. The compression spring 111 is squeezed, and the upward distance of the axis is the same as that of the fixed head 10 at the same level. The height of the protrusions of the wedge plate 11 is equal. The axis of the central rod 9 is upward, and the two locking rods 12 drive the two arc-shaped limiting strips 13 to rotate in the two arc-shaped grooves of the movable seat and the two arc-shaped slots of the fixed seat 1. The lower part of the two arc-shaped limiting strips 13 disengages from the two arc-shaped slots of the fixed seat 1 and is no longer locked. The movable seat and the fixed seat 1 are released from the limit. When the arbitrary moving rod 3 is released, under the action of the telescopic spring 6 on the same side, the wedge plate 11 on the same side resets and no longer squeezes the fixed head 10 in the parallel position and the axis of the central rod 9 is upward. Under the reset action of the compression spring 111, the axis of the central rod 9 is reset downward, driving the two locking rods 12 to pull the arc-shaped limiting strips 13 to reset. The lower part of the two arc-shaped limiting strips 13 resets and re-locks into one of the arc-shaped slots of the fixed seat 1, locking the fixed seat 1 and the movable seat. That is to say, the locking and releasing functions are completed in the process of gripping and releasing the arbitrary grip rod 4, which further improves the efficiency of width adjustment.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A free-width concrete paving machine characterized by: It includes a fixed seat (1), a rotating seat (2), a connector and an adjusting arm (8). The rotating seat (2) rotates coaxially with the fixed seat (1). The two adjusting arms (8) are coaxially connected to the sliding groove of the fixed seat (1) in layers. One end of the unlockable connector is located in the rotating seat (2) and the other end is connected to the adjusting arm (8). The connector converts the rotational force of the rotating seat (2) into the swinging force of the two adjusting arms (8).

2. The freely adjustable concrete paving device according to claim 1, characterized in that: The unlockable connector includes a snap-fit ​​member and a toothed rod (7). The snap-fit ​​member is located on the upper part of the rotating seat (2). One end of the toothed rod (7) is connected to the adjusting arm (8), and the other end is connected to the snap-fit ​​member. The toothed rod (7) transmits rotational force by snapping with the snap-fit ​​member.

3. The freely adjustable concrete paving device according to claim 1, characterized in that: The connector consists of two sets, which are coaxially layered to facilitate gripping and applying force.

4. The freely adjustable concrete paving device according to claim 2, characterized in that: The latching component includes a movable rod (3) and a latching tooth (5). The movable rod (3) and the latching tooth (5) are located on the rotating seat (2). The movable rod (3) and the latching tooth (5) are connected. The locking of the latching tooth (5) and the toothed rod (7) is controlled by the extension and retraction of the movable rod (3).

5. The freely adjustable concrete paving device according to claim 4, characterized in that: The snap-fit ​​component includes snap-fit ​​teeth (5), and the snap-fit ​​teeth (5) and the tooth bar (7) are engaged by meshing tooth blocks.

6. The freely adjustable concrete paving device according to claim 1, characterized in that: The groove between the fixed seat (1) and the rotating seat (2) is an annular T-shaped groove, which makes the rotating seat (2) in a limited position.

7. The freely adjustable concrete paving device according to claim 2, characterized in that: It also includes a lifting assembly and an arc-shaped limiting strip. The lifting assembly is axially disposed within the rotating seat (2). The arc-shaped limiting strip is located between the sliding groove between the fixed seat (1) and the rotating seat (2) and is slidably hinged to the lifting assembly. The lifting assembly converts the centripetal force of the snap-fit ​​member into a vertical lifting force.

8. The freely adjustable concrete paving device according to claim 1, characterized in that: The fixed seat (1) has several arc-shaped slots on the side of the recess, and the rotating seat (2) has two arc-shaped slots on the inner wall of the circular groove.

9. A freely adjustable concrete paving device according to claim 7, characterized in that: The lifting assembly includes a locking rod (12), the two ends of which are respectively engaged in the recess of the fixed seat (1) and the inner wall of the circular groove of the rotating seat (2).

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