A compacting device for road construction

Abstract

The present invention relates to compaction equipment used in road construction and provides a compaction device for road construction, wherein a fixed output wheel and an adjustable output wheel are arranged on a supporting shaft, one side of the fixed output wheel is provided with a third pulley which is an integral structure with the fixed output wheel, and one side of the adjustable output wheel is provided with an adjustable driving wheel which is a separate structure with the fixed output wheel, and the adjusting driving wheel is movably connected with the adjusting output wheel through a plurality of adjusting rods; an adjusting supporting plate and an induction pulley are sleeved on one end of the transmission shaft, and when the compaction plate moves from a harder soil area to a softer soil area and causes its sinking amplitude to increase, the corresponding tamping frame pushes the induction pulley to rotate, thereby driving the adjusting pulley to rotate, and driving the axial adjusting cylinder and the adjusting driving wheel to move, so that the rotation of the two load-bearing blocks is dislocated, thereby causing the forward speed of the compaction plate to decrease, namely, the forward speed of the soft soil area is reduced, and the compaction effect of the soft soil is improved.

Description

Technical Field

[0001] The invention relates to compaction equipment used in road construction, in particular to a compaction device used in road construction. Background Art

[0002] In the field of road construction, compaction devices play a vital role, and their performance directly affects the quality and stability of the road base. With the continuous expansion of road construction and the increasing requirements for road quality, we have found that the existing compaction devices have a serious defect in actual use, that is, they cannot adjust their forward speed according to the tightness of the ground, which easily leads to inconsistent compaction of the compacted road surface.

[0003] In road construction, different types of soils such as sand, clay, and silty soil may exist on the construction section. Their particle composition and structure determine their looseness and tightness characteristics. Sand particles are large and loose, while clay particles are fine and have a certain cohesive force, which makes them react completely differently when subjected to the same external force. When the compaction device is working on loose ground, if the forward speed is too fast, the compaction device will act on the ground for too short a time, and the tamping cannot be fully transmitted to the deep soil. Each compaction effect only stays on the surface, and the deep soil particles cannot be effectively rearranged and compacted, which makes the road surface prone to uneven settlement during subsequent use. On the contrary, when working on tight ground, if the forward speed is still maintained at the same level as the loose ground, over-compacting may occur. On the one hand, over-compacting destroys the original reasonable structure of the soil, and on the other hand, it consumes unnecessary energy and increases construction costs.

[0004] Since the speed cannot be adjusted according to the tightness of the ground, the compaction level of the road surface after the entire compaction operation is completed will be inconsistent. In large-scale road construction projects, this problem of inconsistent compaction level may occur repeatedly in different sections of the road, causing many inconveniences to the subsequent construction process. For example, when laying the pavement surface layer, the unevenness of the base layer will lead to uneven thickness of the surface layer material, affecting the bonding effect and anti-skid performance of the surface layer. At the same time, for road quality inspection, inconsistent compaction level will cause large fluctuations in the test results, making it difficult to accurately assess whether the overall quality of the road meets the design standards. This will not only lead to unnecessary rework, increase construction time and cost, but also have an adverse impact on the progress and quality control of the entire road construction project. Summary of the invention

[0005] Based on this, it is necessary to provide a compaction device for road construction that can automatically adjust the forward speed according to the tightness of the ground in order to address the problems existing in the current compaction device.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A tamping device for road construction comprises a chassis and a transmission shaft rotatably arranged at the front end of the chassis along the left and right directions, two left and right tamping frames are hinged on the transmission shaft, a tamping plate is arranged at the bottom of the front ends of the two tamping frames, a support seat is fixedly arranged on the top of the front ends of the two tamping frames, and a support shaft is arranged between the two support seats; a fixed output wheel and an adjustable output wheel are arranged on the support shaft, a first load block and a second load block are arranged on the fixed output wheel and the adjustable output wheel respectively, a third pulley of an integral structure with the fixed output wheel is provided on one side of the fixed output wheel, and an adjustable drive wheel of a separate structure with the fixed output wheel is provided on one side of the adjustable output wheel, an end of the adjustable drive wheel close to the adjustable output wheel is movably connected to one end of the adjustable output wheel through a plurality of adjusting rods evenly distributed along the circumference; and respectively The first pulley and the second pulley are used to drive the third pulley and the adjusting drive wheel to rotate; the transmission shaft corresponds to one end of the adjusting output wheel and is respectively provided with an adjusting support plate and an induction pulley on the left and right sides of the rear end of the tamping frame corresponding to the end, the adjusting support plate is fixed on the chassis, and the induction pulley is rotatably connected with the adjusting support plate; when the tamping plate moves from a harder soil area to a softer soil area and causes its sinking amplitude to increase, the corresponding tamping frame pushes the induction pulley to rotate; the end portion of the support shaft corresponding to one end of the adjusting drive wheel rotates and the sliding sleeve is provided with an axial adjusting cylinder, the adjusting drive wheel is rotatably arranged on the axial adjusting cylinder, the axial adjusting cylinder is screwed with an adjusting pulley through a thread, and the adjusting pulley is rotatably arranged on the corresponding support seat and is driven to rotate by the induction pulley.

[0008] Preferably, a control handle is hinged at the rear end of the chassis.

[0009] Preferably, a driving motor for driving the transmission shaft to rotate is provided on the chassis, a small driving wheel is provided on the output shaft of the driving motor, a large driving wheel is provided at the end of the transmission shaft corresponding to the output shaft, and the small driving wheel is connected to the large driving wheel through a transmission belt.

[0010] Preferably, the adjusting rod is arranged to be inclined relative to the supporting shaft, and both ends of the adjusting rod are respectively ball-jointed with one end of the adjusting driving wheel and one end of the adjusting output wheel.

[0011] Preferably, both ends of the adjusting rod have balls, one end of the adjusting drive wheel is provided with a second hinge plate, one end of the adjusting output wheel is provided with a first hinge plate, and the first hinge plate and the second hinge plate are both provided with ball sockets adapted to the corresponding balls, and the balls at both ends of the adjusting rod are respectively accommodated in the corresponding ball sockets.

[0012] Preferably, the ramming frame is triangular, and the corner at which it is hinged to the transmission shaft is rounded; a circular slide groove is arranged on the side of the adjusting support plate close to the induction pulley and around the transmission shaft, and an arc-shaped cover plate is arranged on the side of the induction pulley close to the adjusting support plate for sliding and accommodating in the slide groove, and a trigger groove is arranged in the cover plate for the rounded corner of the corresponding ramming frame to be placed therein; the trigger groove is a rounded structure, the rear end of which is an arc groove matched with the rounded corner of the corresponding ramming frame, the upper front end of which is provided with a notch, and the lower front end of which is a sensing surface that can be pushed by the corresponding ramming frame when the sinking amplitude of the ramming plate increases.

[0013] Preferably, a return spring is provided between the cover plate and the adjustment support plate.

[0014] Preferably, the adjusting pulley is provided with a first circular limiting groove near one end of the corresponding supporting seat and around the supporting shaft, and the supporting seat is provided with a first limiting block adapted to the first limiting groove corresponding to one end of the adjusting pulley near the corresponding end, and the first limiting block is rotatably accommodated in the first limiting groove.

[0015] Preferably, the adjusting drive wheel is close to one end of the axial adjusting cylinder and is provided with a second annular limiting groove around the supporting shaft, and the end of the axial adjusting cylinder close to the adjusting drive wheel correspondingly has a second limiting block adapted to the second limiting groove, and the second limiting block is rotatably accommodated in the second limiting groove.

[0016] Preferably, an adjustment limit block is respectively provided on the support shaft and located on the left and right sides of the adjustment output wheel.

[0017] The beneficial effects of the present invention are:

[0018] The device is provided with an induction pulley at one end of the transmission shaft. When the device moves from a harder soil area to a softer soil area and the tamping plate sinks more, the induction pulley can be pushed by the corresponding tamping frame at this time to rotate an angle, and the induction pulley then drives the adjusting pulley to rotate, and the adjusting pulley drives the axial adjusting cylinder and the adjusting driving wheel to move a distance relative to the adjusting output wheel, thereby changing the rotation speed of the adjusting output wheel and the second weight block. At this time, the rotation speed of the first weight block remains unchanged, so the rotation of the second weight block is misaligned with the first weight block, resulting in a decrease in the forward speed of the tamping plate, that is, the forward speed is reduced in the soft soil area, thereby improving the compaction effect of the soft soil; it helps to make the compaction density of the soil consistent, thereby improving the overall compaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the compaction device for road construction of the present invention;

[0020] Figure 2It is a front view of the compacting device for road construction of the present invention;

[0021] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0022] Figure 4 for Figure 2 MM cross-sectional view;

[0023] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0024] Figure 6 for Figure 4 A partial enlarged view of point C in the middle;

[0025] Figure 7 for Figure 2 NN cross-sectional view.

[0026] in:

[0027] 110. chassis; 111. operating handle; 112. driving motor; 113. large driving wheel; 114. first pulley; 115. second pulley; 116. induction pulley; 1161. induction surface; 117. adjusting support plate; 118. transmission shaft; 120. tamping frame; 121. tamping plate; 122. fixed output wheel; 1221. third pulley; 123. first load block; 124. supporting seat; 125. first limit block; 126. supporting shaft; 127. adjusting limit block; 131. adjusting output wheel; 132. second load block; 133. first hinge plate; 134. adjusting rod; 135. adjusting driving wheel; 136. second hinge plate; 137. adjusting pulley; 138. axial adjustment cylinder; 139. second limit block. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] like Figure 1 , 2 As shown, the present invention provides a tamping device for road construction, comprising a chassis 110 and a transmission shaft 118 rotatably arranged at the front end of the chassis 110 along the left and right directions, and two left and right tamping frames 120 are hingedly connected to the transmission shaft 118. Figure 1 From the left and right sides, the ramming frame 120 is roughly triangular, and the rear end of the ramming frame 120 is movably sleeved on the transmission shaft 118, and the corners of the rear end of the ramming frame 120 are rounded. A ramming plate 121 is provided at the bottom of the front end of the two ramming frames 120, and the ramming frame 120 and the ramming plate 121 are an integral structure. A control handle 111 is hinged at the rear end of the chassis 110, and the forward or turning direction of the device can be controlled by holding the control handle 111 during operation.

[0032] like Figure 1 , 4 As shown, a driving motor 112 for driving the transmission shaft 118 to rotate is arranged on the chassis 110, a small driving wheel is arranged on the output shaft of the driving motor 112, a large driving wheel 113 is arranged at the end of the transmission shaft 118 corresponding to the output shaft, and the small driving wheel is connected to the large driving wheel 113 through a transmission belt.

[0033] like Figure 1 , 4-6, a support seat 124 is fixedly provided on the top of the front end of each of the two tamping frames 120, and a support shaft 126 is provided between the left and right support seats 124, that is, the support shaft 126 is parallel to the transmission shaft 118; a fixed output wheel 122 and an adjustable output wheel 131 are rotatably provided on the support shaft 126; a first load block 123 is provided on the fixed output wheel 122, a second load block 132 is provided on the adjusting output wheel 131, and a first pulley 114 and a second pulley 115 are correspondingly provided on the transmission shaft 118; one side of the fixed output wheel 122 has a third pulley 1221 which is an integral structure with it, and the first pulley 114 is connected to the third pulley 1221 through a transmission belt; one side of the adjusting output wheel 131 has an adjusting drive wheel 135 which is a separate structure with it, and the second pulley 115 is connected to the adjusting drive wheel 135 through a transmission belt. The adjusting driving wheel 135 is slidably disposed on the supporting shaft 126 , that is, the adjusting driving wheel 135 can rotate relative to the supporting shaft 126 and can also change its left and right position relative to the supporting shaft 126 .

[0034] One end of the adjusting driving wheel 135 close to the adjusting output wheel 131 is movably connected to one end of the adjusting output wheel 131 through a plurality of adjusting rods 134 evenly distributed along the circumference. Figure 3 As shown, the adjustment rod 134 is tilted relative to the support shaft 126, and the two ends of the adjustment rod 134 are respectively ball-jointed with one end of the adjustment drive wheel 135 and one end of the adjustment output wheel 131. The adjustment drive wheel 135 is connected to the adjustment output wheel 131 in this way, which can not only drive the adjustment output wheel 131 to rotate during normal operation, but also change the left and right position relative to the adjustment output wheel 131, thereby causing the adjustment output wheel 131 to rotate.

[0035] like Figure 3 As shown, both ends of the adjusting rod 134 have balls, one end of the adjusting driving wheel 135 is provided with a second hinge plate 136, one end of the adjusting output wheel 131 is provided with a first hinge plate 133, and the first hinge plate 133 and the second hinge plate 136 are both provided with ball sockets adapted to the corresponding balls, and the balls at both ends of the adjusting rod 134 are respectively accommodated in the corresponding ball sockets.

[0036] like Figure 1 , 4 As shown, an end of the transmission shaft 118 corresponding to the adjustment output wheel 131 is sleeved with an adjustment support plate 117 and an induction pulley 116, and the adjustment support plate 117 and the induction pulley 116 are respectively located at the left and right sides of the rear end of the tamping frame 120 corresponding to the end, the adjustment support plate 117 is fixed on the chassis 110, and a bearing is provided between the adjustment support plate 117 and the transmission shaft 118, and the induction pulley 116 is rotatably provided on the transmission shaft 118 through the bearing. Figure 7As shown, the corner at which the ramming frame 120 is hinged to the transmission shaft 118 is rounded; a circular groove is provided on the side of the adjusting support plate 117 close to the induction pulley 116 and around the transmission shaft 118, and an arc-shaped cover plate is provided on the side of the induction pulley 116 close to the adjusting support plate 117 to slide and be accommodated in the groove, and a trigger groove is provided in the cover plate for the rounded corner of the corresponding ramming frame 120 to be placed therein; the trigger groove is a rounded structure, and its rear end is an arc groove adapted to the rounded corner of the corresponding ramming frame 120, a notch is provided on the upper front end, and the lower front end is a sensing surface 1161 that can be pushed by the corresponding ramming frame 120 when the sinking amplitude of the ramming plate 121 increases.

[0037] like Figure 4 , 6 As shown, the support shaft 126 is rotated and slidably sleeved with an axial adjustment cylinder 138 having an external thread corresponding to the end of the adjustment output wheel 131, and an adjustment pulley 137 is screwed on the external thread of the axial adjustment cylinder 138, and the adjustment pulley 137 is rotatably set on the corresponding support seat 124, and the adjustment drive wheel 135 is rotatably set on the axial adjustment cylinder 138, and the induction pulley 116 is connected to the adjustment pulley 137 through a transmission belt. The adjustment pulley 137 is screwed on the axial adjustment cylinder 138 through a thread, and if the induction pulley 116 causes the adjustment pulley 137 to rotate, the axial adjustment cylinder 138 can be driven to rotate and slide on the support shaft 126 through the thread.

[0038] The adjusting pulley 137 is provided with a first annular limiting groove on one side close to the corresponding support seat 124 and around the support shaft 126. The first limiting block 125 adapted to the first limiting groove is correspondingly provided on one side of the support seat 124 close to the adjusting pulley 137. The first limiting block 125 is rotatably accommodated in the first limiting groove, that is, the adjusting pulley 137 can rotate relative to the first limiting block 125. The adjusting driving wheel 135 is provided with a second annular limiting groove on one side close to the axial adjusting cylinder 138 and around the support shaft 126. The second limiting block 139 adapted to the second limiting groove is correspondingly provided on one side of the axial adjusting cylinder 138 close to the adjusting driving wheel 135. The second limiting block 139 is rotatably accommodated in the second limiting groove, that is, the adjusting driving wheel 135 can rotate relative to the second limiting block 139.

[0039] An adjustment limit block 127 is respectively provided on the support shaft 126 and located on the left and right sides of the adjustment output wheel 131 , for limiting the left and right position adjustment of the adjustment output wheel 131 .

[0040] Working process of this road construction compaction device:

[0041] The tamping device for road construction is assumed to work in a relatively hard soil area in the initial working state. In this working state, the tamping frame 120 swings up and down at a certain amplitude relative to the transmission shaft 118, and the rear end of the corresponding tamping frame 120, i.e., the rounded portion, is accommodated in the trigger groove. The trigger groove is also a rounded structure, and the notch on the upper front end allows the corresponding tamping frame 120 to swing up and down normally. The corresponding tamping frame 120 squeezes the sensing surface 1161, i.e., it will not push the sensing pulley 116 to rotate. During operation, the driving motor 112 drives the large driving wheel 113 to rotate, and the large driving wheel 113 drives the transmission shaft 118 to rotate, so that the first pulley 114 and the second pulley 115 rotate; the first pulley 114 drives the third pulley 1221 to rotate, and the third pulley 1221 drives the fixed output wheel 122 and the first weight block 123 to rotate; the second pulley 115 drives the adjusting driving wheel 135 to rotate, and the adjusting driving wheel 135 drives the adjusting output wheel 131 and the second weight block 132 to rotate through multiple adjusting rods 134. In the initial working state, the second weight block 132 rotates synchronously with the first weight block 123.

[0042] When the tamping plate 121 of the tamping device for road construction moves from a harder soil area to a softer soil area, the sinking amplitude of the tamping plate 121 will increase, and the corresponding tamping frame 120 will squeeze the sensing surface 1161, so that the sensing pulley 116 will rotate an angle, and the sensing pulley 116 will drive the adjusting pulley 137 to rotate, and the adjusting pulley 137 will drive the axial adjusting cylinder 138 and the adjusting driving wheel 135 to move a distance relative to the adjusting output wheel 131. The increasing or decreasing inclination angle of the adjusting rod 134 can change the rotation speed of the adjusting output wheel 131 and the second load block 132, while the rotation speed of the first load block 123 remains unchanged at this time, so the rotation of the second load block 132 and the first load block 123 are misaligned, which finally leads to a decrease in the forward speed of the tamping plate 121, that is, the forward speed of the soft soil area is reduced, thereby improving the compaction effect of the soft soil.

[0043] A return spring is arranged between the cover plate and the adjustment support plate 117. When the corresponding ramming frame 120 presses the sensing surface 1161 to rotate the sensing pulley 116 by an angle, the return spring is compressed; then, under the action of the return spring, the sensing pulley 116 rotates and returns to its original position.

[0044] The diameter of the induction pulley 116 is much larger than the diameter of the adjustment pulley 137. When the induction pulley 116 rotates a smaller angle, the adjustment pulley 137 can rotate at a larger angle, thereby driving the axial adjustment cylinder 138 and the adjustment drive wheel 135 to move a greater distance.

[0045] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A compacting device for road construction, comprising a chassis (110) and a transmission shaft (118) rotatably arranged at the front end of the chassis (110) along the left and right directions, two left and right tamping frames (120) being hingedly connected to the transmission shaft (118), a tamping plate (121) being arranged at the bottom of the front ends of the two tamping frames (120), a support seat (124) being fixedly arranged at the tops of the front ends of the two tamping frames (120), and a support shaft (126) being arranged between the two support seats (124); characterized in that: The support shaft (126) is provided with a fixed output wheel (122) and an adjustable output wheel (131); the fixed output wheel (122) and the adjustable output wheel (131) are respectively provided with a first load block (123) and a second load block (132); one side of the fixed output wheel (122) is provided with a third belt pulley (1221) of an integral structure therewith; one side of the adjustable output wheel (131) is provided with an adjustable drive wheel (135) of a separate structure therewith; one end of the adjustable drive wheel (135) close to the adjustable output wheel (131) is movably connected to one end of the adjustable output wheel (131) via a plurality of adjustment rods (134) uniformly distributed along the circumference; the transmission shaft (118) is provided with a first belt pulley (114) and a second belt pulley (115) for driving the third belt pulley (1221) and the adjustable drive wheel (135) to rotate respectively; one end of the transmission shaft (118) corresponding to the adjustable output wheel (131) The left and right sides of the rear end of the tamping frame (120) corresponding to the end are respectively sleeved with an adjustment support plate (117) and an induction pulley (116); the adjustment support plate (117) is fixed on the chassis (110); the induction pulley (116) is rotatably connected to the adjustment support plate (117); when the tamping plate (121) moves from a relatively hard soil area to a relatively soft soil area, causing its sinking amplitude to increase, the corresponding tamping frame (120) pushes the induction pulley (116) to rotate; the support shaft (126) rotates at the end corresponding to one end of the adjustment drive wheel (135) and is slidably sleeved with an axial adjustment cylinder (138); the adjustment drive wheel (135) is rotatably set on the axial adjustment cylinder (138); the axial adjustment cylinder (138) is screwed with an adjustment pulley (137) by means of a thread; the adjustment pulley (137) is rotatably set on the corresponding support seat (124) and is driven to rotate by the induction pulley (116).

2. The road construction compaction device according to claim 1, characterized in that: A control handle (111) is hingedly connected to the rear end of the chassis (110).

3. The road construction compaction device according to claim 1, characterized in that: The chassis (110) is provided with a driving motor (112) for driving the transmission shaft (118) to rotate; a small driving wheel is provided on the output shaft of the driving motor (112); a large driving wheel (113) is provided at one end of the transmission shaft (118) corresponding to the output shaft; the small driving wheel is connected to the large driving wheel (113) via a transmission belt.

4. The road construction compaction device according to claim 1, characterized in that: The adjustment rod (134) is arranged to be inclined relative to the support shaft (126), and two ends of the adjustment rod (134) are respectively ball-jointed with one end of the adjustment drive wheel (135) and one end of the adjustment output wheel (131).

5. The road construction compaction device according to claim 4, characterized in that: Both ends of the adjusting rod (134) have round balls, one end of the adjusting drive wheel (135) is provided with a second hinge plate (136), one end of the adjusting output wheel (131) is provided with a first hinge plate (133), and both the first hinge plate (133) and the second hinge plate (136) are provided with ball sockets adapted to the corresponding round balls, and the round balls at both ends of the adjusting rod (134) are respectively accommodated in the corresponding ball sockets.

6. The road construction compaction device according to claim 1, characterized in that: The tamping frame (120) is triangular in shape, and the corner at which it is hinged to the transmission shaft (118) is rounded; a circular groove is provided on the side of the adjustment support plate (117) close to the induction pulley (116) and around the transmission shaft (118); a circular arc-shaped cover plate is provided on the side of the induction pulley (116) close to the adjustment support plate (117) and is slidably accommodated in the groove; a trigger groove is provided in the cover plate for the rounded corner of the corresponding tamping frame (120) to be placed therein; the trigger groove is a rounded structure, the rear end of which is a circular arc groove adapted to the rounded corner of the corresponding tamping frame (120), the upper part of the front end is provided with a notch, and the lower part of the front end is a sensing surface (1161) that can be pushed by the corresponding tamping frame (120) when the tamping plate (121) sinks more.

7. The road construction compaction device according to claim 6, characterized in that: A return spring is provided between the cover plate and the adjustment support plate (117).

8. The road construction compaction device according to claim 1, characterized in that: The adjusting pulley (137) is provided with a first annular limiting groove near one end of the corresponding support seat (124) and around the support shaft (126); a first limiting block (125) adapted to the first limiting groove is provided at one end of the support seat (124) near the adjusting pulley (137); the first limiting block (125) is rotatably accommodated in the first limiting groove.

9. The road construction compaction device according to claim 1, characterized in that: The adjusting drive wheel (135) is provided with a second annular limiting groove at one end close to the axial adjusting cylinder (138) and around the supporting shaft (126); the axial adjusting cylinder (138) is provided with a second limiting block (139) corresponding to the second limiting groove at one end close to the adjusting drive wheel (135); the second limiting block (139) is rotatably accommodated in the second limiting groove.

10. The road construction compaction device according to claim 1, characterized in that: An adjustment limit block (127) is respectively arranged on the support shaft (126) and located on the left and right sides of the adjustment output wheel (131).

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