Road and bridge crack reinforcing device and reinforcing method

Abstract

A road bridge crack reinforcing device and reinforcing method, comprising a vehicle body, a handle, a caster, a steel drill storage assembly, a steel drill installation assembly, a concrete pouring assembly and a steel drill; by setting the vehicle body, the handle, the caster, the steel drill storage assembly, the steel drill installation assembly, the concrete pouring assembly and the steel drill, the functions of moving, steel drill storage, steel drill installation and concrete pouring are integrated, the device is used to open an inverted U-shaped groove near the bridge damage place by using an impact drill, the steel drill storage assembly is started, the steel drill is dropped onto the steel drill installation bottom plate, the steel drill installation assembly is started, the steel drill is installed into the U-shaped groove, then the concrete pouring assembly is started, and the crack is poured and reinforced, thereby reducing the manual labor intensity, reducing the reinforcing cost, and improving the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of engineering crack reinforcement technology, and in particular to a road and bridge crack reinforcement device and reinforcement method. Background Technology

[0002] With the long-term use of roads and bridges, cracks of varying degrees will appear on the road surface or bridge surface. If they are not repaired and repaired in time, they will aggravate the damage to the road surface and bridge surface. The traditional solution is to fill them. However, this method will cause the same cracks to appear again after a period of time, affecting the working performance. Therefore, there is an urgent need for a device to solve the problem of cracks in bridge surface and road surface.

[0003] For example, Chinese invention patent CN106917359A provides a road and bridge crack reinforcement device and method. When cracks appear on the bridge deck or road surface, the cracks are made into grooves, the reinforcement device is placed at the cracks, the steel plate is fixed with bolts, and grout is injected into the cracks through grouting holes. After the grout solidifies and stabilizes, the device is embedded in the groove of the road surface or bridge deck, without forming a protrusion on the road surface. Vertical and horizontal steel bars are set under the steel plate, and each steel bar has a small section of horizontal steel bar. In this way, the mortar in the crack solidifies more stably during grouting. At the same time, there is a waterproof coating layer under the steel plate to prevent damage due to rainwater.

[0004] Through research on the above-mentioned road and bridge crack reinforcement device and reinforcement method, it was found that the patent only solved the reinforcement problem from the perspective of process method, but did not solve the reinforcement problem from the perspective of equipment.

[0005] Therefore, we urgently need to invent a road and bridge crack reinforcement device and method that can not only solve the problem in terms of process methods, but also solve the reinforcement problem from the perspective of equipment. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a road and bridge crack reinforcement device and method. By incorporating a vehicle body, handles, casters, a steel rod storage assembly, a steel rod installation assembly, a concrete pouring assembly, and steel rods, the device integrates functions such as mobility, steel rod storage, steel rod installation, and concrete pouring. In use, an inverted U-shaped groove is drilled near the damaged area of ​​the bridge using an impact drill. The steel rod storage assembly is activated to lower the steel rod onto the steel rod installation base plate. The steel rod installation assembly is then activated to install the steel rod into the U-shaped groove. Finally, the concrete pouring assembly is activated to reinforce the crack. This reduces manual labor intensity, lowers reinforcement costs, and improves work efficiency.

[0007] The technical solution used in this invention is: a road and bridge crack reinforcement device and reinforcement method, comprising: a vehicle body, handle, casters, a steel rod storage assembly, a steel rod installation assembly, a concrete pouring assembly, and a steel rod;

[0008] The vehicle body is a box-type structure assembled from plates. It has handles on the outside and casters on the bottom. Inside, it has a steel rod storage assembly, a steel rod installation assembly, and a concrete pouring assembly. The upper surface of the vehicle body has an opening for placing steel rods. The handles are installed on the side of the vehicle body and can push the vehicle body.

[0009] Near the damaged area of ​​the bridge, an inverted U-shaped groove is drilled using an impact drill. The steel rod is then lowered into the groove, and the device is pushed until the rectangular groove on the underside of the steel rod mounting base is roughly aligned with the U-shaped groove. The steel rod is placed in the steel rod placement box, and the device is opened to load the steel rod. Under the action of the swing mechanism, the steel rod is transferred into the steel rod mounting base. At this time, under the action of gravity, the steel rod naturally slides into the U-shaped groove. Next, the displacement motor is rotated, the main shaft moves down and the locking screw is tightened, and the rod moves inward to make it fit tightly against the inner side of the U-shaped groove, applying pre-tightening. After tightening is completed, the main shaft rises back to its original position. Next, the opening at the bottom of the concrete mixing tank is opened, and the concrete flows into the U-shaped groove on the ground along the pipe, the steel rod mounting base, and the concrete delivery port, completing the pouring process.

[0010] Furthermore, the steel rod storage assembly includes: a steel rod placement box, a swing mechanism, a shift fork, an adjustable counterweight, a swing arm A, a connecting rod, a first rotating shaft, a second rotating shaft, a fixed base, a synchronous belt mechanism, a drive motor, an encoder, a third rotating shaft, a fourth rotating shaft, and a crank.

[0011] The steel rod placement box is located above the steel rod storage assembly and is mounted on the vehicle body partition. The steel rod placement box has a rectangular groove inside, and a 45-degree downward-facing steel rod sliding plate is installed in the rectangular groove. The lower end of the steel rod sliding plate has a groove, allowing the steel rod to slide to this point and be temporarily fixed. The swing mechanism is located below the steel rod storage assembly. The swing mechanism can lift the steel rod from the groove. The shift fork is rotatably mounted on the fourth rotating shaft. The adjustable counterweight is mounted on the lower side of the shift fork via a screw, ensuring that the shift fork maintains its U-shaped opening facing upwards throughout the entire movement of the swing mechanism. The second rotating shaft is rotatably mounted through the round holes of the fixed bases on both sides. The drive motor is connected to the second rotating shaft via a synchronous belt mechanism. The connecting rod is rotatably connected to the crank via the first rotating shaft. The swing rod A and the connecting rod are connected via a third rotating shaft, and the swing rod A can rotate around the third rotating shaft. The encoder is mounted on the fixed base below the swing rod A, and its rotating shaft is connected to the swing rod A.

[0012] Furthermore, the drive motor is a servo motor.

[0013] Furthermore, the steel rod mounting assembly includes: a shifting motor, a mounting base plate, a linear guide rail, a coupling, a support plate, a steel rod limit plate, a steel rod mounting base, a limit switch, a concrete delivery port, a tightening head, a spindle seat, a spindle, and a lead screw;

[0014] The mounting base plate and the steel rod mounting base are fixedly connected. The shifting motor is mounted on the upper mounting boss of the mounting base plate. The linear guide rails are symmetrically mounted on both sides of the mounting base plate. The upper end of the lead screw is fixedly connected to the shifting motor through a coupling, and the lower end is rotatably mounted on the mounting boss on the lower side of the mounting base plate. The support plate is fixedly connected to the linear guide rail and to the lead screw nut. The main shaft is mounted on the support plate through a main shaft seat. The tightening head is mounted on the shaft end of the main shaft seat. The steel rod limiting plate is vertically mounted on the upper surface of the steel rod mounting base. A concrete conveying port is reserved on the upper surface of the steel rod mounting base. The limit switch is installed in the gap between the mounting base plate and the steel rod mounting base.

[0015] Furthermore, the concrete pouring assembly includes: a concrete mixing tank, a guide rod, a rotating motor, a timing belt, a rocker arm seat, a rocker arm B, a top rod, a base plate, and a drive cam;

[0016] The rotating motor and the rocker arm seat are fixedly installed on the upper surface of the base plate. The rotating motor is connected to the rotating shaft via a synchronous belt. A drive cam is installed on the rotating shaft. The rocker arm B is rotatably installed on the rocker arm seat. One end of the rocker arm B and the drive cam form a cam mechanism, and the other end contacts the lower side of the top rod. The concrete mixing tank is fixedly connected to the upper end of the top rod and slidably connected to the guide rod. The lower outlet of the concrete mixing tank is connected to the concrete delivery port via a pipe.

[0017] Furthermore, the steel drill includes: a drill rod, a locking sleeve, and a locking screw; the drill rods on both sides are inserted into the locking sleeve, the drill rods have a barb structure and can be overlapped together, and there is a hole at the overlap, through which the locking screw can pass.

[0018] Because the present invention adopts the above-described technical solution, the present invention has the following advantages:

[0019] 1) Only manual labor is required to move the vehicle body to the crack in the road or bridge that needs reinforcement, reducing the intensity of manual labor;

[0020] 2) This equipment can clamp steel rods and pour concrete at damaged areas, reducing reinforcement costs and improving work efficiency. Attached Figure Description

[0021] Figure 1-2 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 3-4 This is a schematic diagram of the steel wire storage component of the present invention.

[0023] Figure 5 This is a schematic diagram of the steel rod mounting assembly of the present invention.

[0024] Figure 6 This is a schematic diagram of the concrete casting component of the present invention.

[0025] Figure 7 This is a schematic diagram of the steel rod of the present invention.

[0026] Reference numerals: 1-Vehicle body; 2-Handle; 3-Cast; 4-Steel rod storage assembly; 5-Steel rod mounting assembly; 6-Concrete pouring assembly; 7-Steel rod; 401-Steel rod placement box; 402-Swing mechanism; 4021-Shift fork; 4022-Adjustable counterweight; 4023-Swing arm A; 4024-Connecting rod; 4025-First rotating shaft; 4026-Second rotating shaft; 4027-Fixed base; 4028-Synchronous belt mechanism; 4029-Drive motor; 40210-Encoder; 40211-Third rotating shaft; 40212-Fourth rotating shaft; 40213-Crank; 501-Shifting motor Machine; 502-Mounting base plate; 503-Linear guide rail; 504-Coupling; 505-Support plate; 506-Steel chisel limit plate; 507-Steel chisel mounting base; 508-Limit switch; 509-Concrete conveying port; 510-Tightening head; 511-Main spindle seat; 512-Main spindle; 513-Lead screw; 601-Concrete mixing tank; 602-Guide rod; 603-Rotating motor; 604-Synchronous belt; 605-Swing rod seat; 606-Swing rod B; 607-Top rod; 608-Base plate; 609-Drive cam; 701-Chisel rod; 702-Locking sleeve; 703-Locking screw. Detailed Implementation

[0027] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; however, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this 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. Therefore, they should not be construed as limiting this invention.

[0029] Examples, such as Figure 1-7As shown, a road and bridge crack reinforcement device and reinforcement method includes: vehicle body 1, handle 2, caster 3, steel bar storage assembly 4, steel bar installation assembly 5, concrete pouring assembly 6 and steel bar 7.

[0030] The vehicle body 1 is a box-type structure assembled from plates. It has a handle 2 on the outside and casters 3 on the bottom. Inside, it has a steel rod storage component 4, a steel rod installation component 5 and a concrete pouring component 6. The upper surface of the vehicle body 1 has an opening for placing steel rods 7. The handle 2 is installed on the side of the vehicle body 1 and can push the vehicle body 1.

[0031] Near the damaged area of ​​the bridge, an inverted U-shaped groove is drilled using an impact drill. The steel rod 7 is then inserted into the groove. The device is pushed until the rectangular groove on the underside of the steel rod mounting base 507 is roughly aligned with the U-shaped groove. The steel rod 7 is placed in the steel rod placement box 401. The device is then opened to load the steel rod 7. Under the action of the swing mechanism 402, the steel rod 7 is transferred to the steel rod mounting base 507. At this time, under the action of gravity, the steel rod 7 naturally slides into the U-shaped groove. Next, the shifting motor 501 is rotated, the main shaft 512 moves down and the locking screw 703 is tightened. The rod 701 moves inward to make it fit tightly against the inner side of the U-shaped groove, applying pre-tightening. After tightening is completed, the main shaft 512 rises back to its original position. Next, the opening below the concrete mixing tank 601 is opened, and concrete flows into the U-shaped groove on the ground along the pipe, the steel rod mounting base 507, and the concrete delivery port 509, completing the pouring process. The device is then pushed open, and the poured surface is leveled and repaired as needed.

[0032] In one optional embodiment of the present invention, such as Figure 3-4 As shown, the steel rod storage assembly 4 includes: a steel rod placement box 401, a swing mechanism 402, a shift fork 4021, an adjustable counterweight 4022, a swing rod A 4023, a connecting rod 4024, a first rotating shaft 4025, a second rotating shaft 4026, a fixed base 4027, a synchronous belt mechanism 4028, a drive motor 4029, an encoder 40210, a third rotating shaft 40211, a fourth rotating shaft 40212, and a crank 40213;

[0033] The steel rod placement box 401 is located above the steel rod storage assembly 4 and is installed on the partition of the vehicle body 1. The steel rod placement box 401 has a rectangular groove inside, and a 45-degree steel rod sliding plate is installed downwards from the rectangular groove. The lower end of the steel rod sliding plate has a groove, where the steel rod 7 can be temporarily fixed. The swing mechanism 402 is located below the steel rod storage assembly 4. The swing mechanism 402 can lift the steel rod 7 out of the groove. The shift fork 4021 is rotatably mounted on the fourth rotating shaft 40212. An adjustable counterweight 4022 is installed below the shift fork 4021 via a screw, so that during the entire movement of the swing mechanism 402, the shift fork... 4021 can keep the U-shaped opening facing upwards. The second rotating shaft 4026 is rotatably installed through the round holes of the fixed bases 4027 on both sides. The drive motor 4029 is connected to the second rotating shaft 4026 through the synchronous belt mechanism 4028. The connecting rod 4024 is rotatably connected to the crank 40213 through the first rotating shaft 4025. The swing arm A4023 and the connecting rod 4024 are connected through the third rotating shaft 40211, and the swing arm A4023 can rotate around the third rotating shaft 40211. The encoder 40210 is installed on the fixed base 4027 on the lower side of the swing arm A4023, and its rotating shaft is connected to the swing arm A4023.

[0034] The ready-to-use steel rod 7 can be placed face down in the steel rod placement box 401. The steel rod 7 will slide along the steel rod sliding plate to the lower groove. In the initial state of the swing mechanism 402, the shift fork 4021 is located below the steel rod placement box 401. When the drive motor 4029 rotates, it drives the second rotating shaft 4026 and crank 40213 to rotate through the synchronous belt mechanism 4028. Under the action of the connecting rod 4024, the swing rod A4023 drives the shift fork 4021 to move forward. When the shift fork 4021 passes through the sliding plate groove, the shift fork 4021 lifts the steel rod 7 away from the groove and continues to swing forward until the shift fork 4021 swings to the steel rod limiting plate 506. The steel rod 7 is blocked by the steel rod limiting plate 506, disengages from the shift fork 4021, and falls into the rectangular groove in the steel rod mounting base 507.

[0035] In one optional embodiment of the present invention, such as Figure 5As shown, the steel rod mounting assembly 5 includes: a shifting motor 501, a mounting base 502, a linear guide rail 503, a coupling 504, a support plate 505, a steel rod limiting plate 506, a steel rod mounting base 507, a limit switch 508, a concrete delivery port 509, a tightening head 510, a spindle seat 511, a spindle 512, and a lead screw 513. The mounting base 502 and the steel rod mounting base 507 are fixedly connected. The shifting motor 501 is installed on the mounting boss on the upper part of the mounting base 502. The linear guide rails 503 are symmetrically installed on both sides of the mounting base 502. The upper end of the lead screw 513 is connected to the coupling. 504 is fixedly connected to the shifting motor 501, and its lower end is rotatably mounted on the mounting boss on the lower side of the mounting base 502. The support plate 505 is fixedly connected to the linear guide rail 503 and to the lead screw 513 nut. The main shaft 512 is mounted on the support plate 505 through the main shaft seat 511. The tightening head 510 is mounted on the shaft end of the main shaft seat 511. The steel rod limit plate 506 is vertically mounted on the upper surface of the steel rod mounting base 507. A concrete delivery port 509 is reserved on the upper surface of the steel rod mounting base 507. The limit switch 508 is installed in the gap between the mounting base 502 and the steel rod mounting base 507.

[0036] When the steel rod 7 is in the rectangular groove inside the steel rod mounting base 507, the shift motor 501 drives the lead screw 513 to rotate, thereby causing the support plate 505 to move downward. The spindle seat 511 carries the spindle 512 downward. When the support plate 505 triggers the limit switch 508, the tightening head 510 has been engaged with the locking screw 703. At this time, the spindle 512 rotates, causing the locking screw 703 to be screwed into the locking sleeve 702. Under the action of the locking screw 703, the rod 701 moves inward to complete the clamping. After the clamping is completed, the shift motor 501 rotates in the opposite direction to make the support plate 505 rise and reset.

[0037] In one optional embodiment of the present invention, such as Figure 6 As shown, the concrete pouring assembly 6 includes: a concrete mixing tank 601, a guide rod 602, a rotating motor 603, a synchronous belt 604, a rocker arm seat 605, a rocker arm B 606, a top rod 607, a base plate 608, and a drive cam 609.

[0038] A rotating motor 603 and a rocker arm seat 605 are fixedly installed on the upper surface of the base plate 608. The rotating motor 603 is connected to the rotating shaft via a synchronous belt 604. A drive cam 609 is installed on the rotating shaft. A rocker arm B606 is rotatably installed on the rocker arm seat 605. One end of the rocker arm B606 forms a cam mechanism with the drive cam 609, and the other end contacts the lower side of the top rod 607. A concrete mixing tank 601 is fixedly connected to the upper end of the top rod 607 and is slidably connected to the guide rod 602. The lower outlet of the concrete mixing tank 601 is connected to the concrete delivery port 509 via a pipe.

[0039] The rotating motor 603 drives the synchronous belt 609 to rotate via 604. Under the action of the cam mechanism, the rocker arm B606 begins to swing back and forth, which in turn pushes the top rod 607 to move up and down. The concrete mixing tank 601 moves up and down continuously to achieve the mixing of concrete in the tank. During pouring, the lower outlet of the concrete mixing tank 601 opens, and the concrete flows from the concrete delivery port 509 into the area below the steel rod mounting base 507 through the pipeline under the action of the up and down movement of the concrete mixing tank 601, completing the pouring near the steel rod 7.

Claims

1. A reinforcement method for a road and bridge crack reinforcement device, characterized in that, include: Vehicle body (1), handle (2), casters (3), steel rod storage assembly (4), steel rod installation assembly (5), concrete pouring assembly (6) and steel rod (7); The vehicle body (1) is a box-type structure assembled from plates. It has a handle (2) installed on the outside and casters (3) installed on the lower side. Inside, it has a steel rod storage assembly (4), a steel rod installation assembly (5) and a concrete pouring assembly (6). The upper surface of the vehicle body (1) has an opening for placing steel rods (7). The handle (2) is installed on the side of the vehicle body (1) and can push the vehicle body (1). The steel rod (7) includes: a rod (701), a locking sleeve (702), and a locking screw (703); the rods (701) on both sides are inserted into the locking sleeve (702), the rods (701) have a barb structure and can be overlapped together, and there is a hole at the overlap, through which the locking screw (703) can pass; Near the damaged area of ​​the bridge, an inverted U-shaped groove is drilled using an impact drill. The steel rod (7) is then inserted into the groove. The device is pushed until the rectangular groove on the underside of the steel rod mounting base (507) is basically aligned with the U-shaped groove. The steel rod (7) is placed in the steel rod placement box (401). The device is then opened to load the steel rod (7). Under the action of the swing mechanism (402), the steel rod (7) is transferred to the steel rod mounting base (507). At this time, under the action of gravity, the steel rod (7) naturally slides in. Next, the shift motor (501) is rotated, the main shaft (512) is moved down and the locking screw (703) is tightened, the chisel (701) moves inward so that it is close to the inner side of the U-shaped groove, and pre-tightening is applied. After tightening is completed, the main shaft (512) rises and resets. Next, the opening below the concrete mixing tank (601) is opened, and the concrete flows into the U-shaped groove on the ground along the pipe and the steel chisel mounting base (507) and the concrete delivery port (509), completing the pouring process.

2. The reinforcement method of the road and bridge crack reinforcement device according to claim 1, characterized in that, The steel rod storage assembly (4) includes: a steel rod placement box (401), a swing mechanism (402), a shift fork (4021), an adjustable counterweight (4022), a swing rod A (4023), a connecting rod (4024), a first rotating shaft (4025), a second rotating shaft (4026), a fixed base (4027), a synchronous belt mechanism (4028), a drive motor (4029), an encoder (40210), a third rotating shaft (40211), a fourth rotating shaft (40212), and a crank (40213). The steel rod placement box (401) is located on the upper part of the steel rod storage assembly (4) and is installed on the partition of the vehicle body (1). The steel rod placement box (401) has a rectangular groove inside, and a steel rod sliding plate with a 45-degree angle is installed downward in the rectangular groove. The lower end of the steel rod sliding plate has a groove, and the steel rod (7) can be temporarily fixed when it slides to this position. The swing mechanism (402) is located on the lower part of the steel rod storage assembly (4). The swing mechanism (402) can lift the steel rod (7) in the groove away. The shift fork (4021) is rotatably mounted on the fourth rotating shaft (40212). The adjustable counterweight (4022) is installed on the lower side of the shift fork (4021) by a screw, so that during the entire movement of the swing mechanism (402), the shift fork (4021) can be rotated. 021) The U-shaped opening can be kept facing upward. The second rotating shaft (4026) is rotatably installed through the round holes of the fixed bases (4027) on both sides. The drive motor (4029) is connected to the second rotating shaft (4026) through the synchronous belt mechanism (4028). The connecting rod (4024) is rotatably connected to the crank (40213) through the first rotating shaft (4025). The rocker arm A (4023) and the connecting rod (4024) are connected through the third rotating shaft (40211). The rocker arm A (4023) can rotate around the third rotating shaft (40211). The encoder (40210) is installed on the fixed base (4027) on the lower side of the rocker arm A (4023). Its rotating shaft is connected to the rocker arm A (4023).

3. The reinforcement method of the road and bridge crack reinforcement device according to claim 2, characterized in that, The drive motor (4029) is a servo motor.

4. The reinforcement method of the road and bridge crack reinforcement device according to claim 1, characterized in that, The steel rod mounting assembly (5) includes: a shift motor (501), a mounting base plate (502), a linear guide rail (503), a coupling (504), a support plate (505), a steel rod limiting plate (506), a steel rod mounting base (507), a limit switch (508), a concrete delivery port (509), a tightening head (510), a spindle seat (511), a spindle (512), and a lead screw (513); The mounting base plate (502) and the steel rod mounting base (507) are fixedly connected. The shifting motor (501) is mounted on the upper mounting boss of the mounting base plate (502). The linear guide rails (503) are symmetrically mounted on both sides of the mounting base plate (502). The upper end of the lead screw (513) is fixedly connected to the shifting motor (501) through a coupling (504), and the lower end is rotatably mounted on the mounting boss on the lower side of the mounting base plate (502). The support plate (505) is fixedly connected to the linear guide rails (503) and... The lead screw (513) is fixedly connected to the nut. The main shaft (512) is mounted on the support plate (505) through the main shaft seat (511). The tightening head (510) is mounted on the shaft end of the main shaft seat (511). The steel rod limiting plate (506) is vertically mounted on the upper surface of the steel rod mounting base (507). The upper surface of the steel rod mounting base (507) has a reserved concrete delivery port (509). The limit switch (508) is installed in the gap between the mounting base plate (502) and the steel rod mounting base (507).

5. The reinforcement method of the road and bridge crack reinforcement device according to claim 1, characterized in that, The concrete pouring assembly (6) includes: a concrete mixing tank (601), a guide rod (602), a rotating motor (603), a synchronous belt (604), a rocker arm seat (605), a rocker arm B (606), a top rod (607), a base plate (608), and a drive cam (609). The rotating motor (603) and the rocker arm seat (605) are fixedly installed on the upper surface of the base plate (608). The rotating motor (603) is connected to the rotating shaft through the synchronous belt (604). A drive cam (609) is installed on the rotating shaft. The rocker arm B (606) is rotatably installed on the rocker arm seat (605). One end of the rocker arm B (606) forms a cam mechanism with the drive cam (609), and the other end contacts the lower side of the top rod (607). The concrete mixing tank (601) is fixedly connected to the upper end of the top rod (607) and slidably connected to the guide rod (602). The lower outlet of the concrete mixing tank (601) is connected to the concrete delivery port (509) through a pipe.

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