A concrete placing boom

Abstract

The present invention belongs to the field of concrete placing, and specifically discloses a concrete placer, which includes a placing vehicle, a concrete mixing and discharging mechanism, a self-cleaning and anti-splashing device, and a fast-forward and slow-return defoaming device. According to the situation that the concrete after placing contains air bubbles, which affects the strength of the concrete, a connecting rod drive mode of fast-forward and slow-return is adopted to achieve the technical effect of fast-forward and slow-return defoaming of the concrete, effectively discharging the air bubbles in the concrete and improving the placing quality of the concrete; by means of the lifting force during defoaming, a combination of trigger pressing and elastic torsion is adopted to achieve the technical effect of self-cleaning and anti-adhesion of the placer.

Description

Technical Field

[0001] The present invention belongs to the technical field of concrete placing, and specifically refers to a concrete placer. Background Art

[0002] A concrete placer is a mechanical device used to transport and evenly place concrete to a designated position. There are air bubbles in the concrete after placing by the concrete placer. At present, generally, the method of manual vibration is used to eliminate the bubbles. The vibration efficiency is slow, and it is impossible to ensure fast insertion and slow extraction, increasing the chance of air bubbles being brought into the interior of the concrete, reducing the compactness of the concrete, and affecting the strength and durability of the concrete; and it does not have the function of real-time mixing of concrete, and long-term placing is likely to cause segregation and layering of the concrete, affecting the placing quality. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a concrete placer. According to the situation that the concrete after placing contains air bubbles and affects the strength of the concrete, the connecting rod transmission method of fast forward and slow return is adopted to achieve the technical effect of fast forward and slow return defoaming of the concrete, effectively discharging the air bubbles in the concrete, and improving the placing quality of the concrete; by means of the lifting force during defoaming, the method of combining trigger pressing and elastic torsion is adopted to achieve the technical effect of self-cleaning and anti-adhesion of the placer.

[0004] The technical solution adopted by the present invention is as follows: The present invention provides a concrete placer, including a placing vehicle, a concrete mixing and discharging mechanism, a self-cleaning and anti-splashing device, and a fast forward and slow return defoaming device. The concrete mixing and discharging mechanism is arranged on the placing vehicle, the self-cleaning and anti-splashing device is arranged on the placing vehicle, the self-cleaning and anti-splashing device is arranged below the concrete mixing and discharging mechanism, the fast forward and slow return defoaming device is arranged on the placing vehicle, and the fast forward and slow return defoaming device is in contact with the self-cleaning and anti-splashing device; the fast forward and slow return defoaming device includes a fixed limit plate, a connecting rod assembly, a defoaming trigger column, and a defoaming motor. The fixed limit plate is arranged on the placing vehicle, the connecting rod assembly is rotatably arranged on the fixed limit plate, the defoaming trigger column is hinged to the connecting rod assembly, the defoaming motor is arranged on the fixed limit plate, and the output end of the defoaming motor is connected to the connecting rod assembly.

[0005] Further, the connecting rod assembly includes a driving rod, a linkage rod, a limiting rod, a transmission rod, and a connecting rod. One end of the driving rod is rotatably arranged on the fixed limit plate, one end of the linkage rod is hinged to the other end of the driving rod, one end of the limiting rod is rotatably arranged on the fixed limit plate, the other end of the limiting rod is hinged to the other end of the linkage rod, one end of the transmission rod is hinged at the hinge joint of the limiting rod and the linkage rod, one end of the connecting rod is hinged to the other end of the transmission rod, and the other end of the connecting rod is hinged to the defoaming trigger column.

[0006] Preferably, a trigger pressing plate and an orientation block are provided on the side wall of the defoaming trigger column.

[0007] Furthermore, an orientation sliding groove is provided on the fixed limit plate, and the orientation block is snap-fitted and slidably arranged in the orientation sliding groove.

[0008] Wherein, the self-cleaning anti-splash device includes a supporting bottom plate, an anti-splash cylinder, a torsion groove, and a resilient pressing and scraping device. The supporting bottom plate is arranged on the cloth cart, the anti-splash cylinder is snap-fitted and rotatably arranged on the supporting bottom plate, the torsion groove is spirally arranged on the outer circumferential wall of the anti-splash cylinder, the resilient pressing and scraping device is arranged on the supporting bottom plate, and the resilient pressing and scraping device is in contact with the defoaming trigger column.

[0009] Furthermore, the resilient pressing and scraping device includes a fixed frame, a spring, a pressing plate, a torsion column, and a scraping plate. The fixed frame is arranged on the supporting bottom plate, the pressing plate is snap-fitted and slidably arranged in the fixed frame, one end of the spring is arranged on the inner upper wall of the fixed frame, the other end of the spring is connected to the pressing plate, the torsion column is arranged on the pressing plate, the torsion column is matched with the torsion groove, and the scraping plate is arranged on the fixed frame, and the scraping plate is attached to the inner wall of the anti-splash cylinder.

[0010] As a further preference of the present invention, a through groove is provided on one side wall of the fixed frame, the trigger pressing plate is lifted and lowered in the through groove, and a scraping sliding groove is provided on the other opposite side wall of the fixed frame, and the torsion column is lifted and lowered in the scraping sliding groove.

[0011] Furthermore, a snap-fitting disc is provided on the supporting bottom plate, a snap-fitting groove is provided on the bottom wall of the anti-splash cylinder, and the anti-splash cylinder is snap-fitted and rotatably arranged on the snap-fitting disc through the snap-fitting groove.

[0012] Wherein, the concrete mixing and discharging mechanism includes a mixing cylinder, a stirring and mixing rod, a concrete pump, and a mixing motor. The mixing cylinder is arranged on the cloth cart, the stirring and mixing rod is rotatably arranged in the mixing cylinder, the concrete pump is arranged on the cloth cart, the concrete pump is connected to the mixing cylinder in a through manner, the mixing motor is arranged on the cloth cart, the output end of the mixing motor is connected to the stirring and mixing rod, and a feeding port is provided on the mixing cylinder.

[0013] Furthermore, a force-assisted moving member is provided on the cloth cart. The force-assisted moving member includes a moving gear, a force-assisted gear, and a force-assisted belt. The moving gear is arranged on the axle of the cloth cart, the force-assisted gear is rotatably arranged on the outer side wall of the mixing cylinder, the force-assisted gear is connected to the stirring and mixing rod, the force-assisted belt is sleeved on the moving gear and the force-assisted gear, and a snap-fitting groove is provided on the inner side wall of the force-assisted belt, and the snap-fitting groove is meshed and connected to the moving gear and the force-assisted gear.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows: This solution provides a concrete distributor. Considering that the concrete after distribution contains air bubbles, which affect the strength of the concrete, a connecting rod drive method of fast forward and slow return is adopted, achieving the technical effect of fast forward and slow return defoaming of the concrete, effectively discharging the air bubbles in the concrete, and improving the distribution quality of the concrete; by means of the lifting force during defoaming, a method combining trigger pressing and elastic torsion is adopted, achieving the technical effect of self-cleaning and anti-adhesion of the distributor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic diagram of the overall structure of a concrete distributor proposed by the present invention;

[0016] Figure 2 FIG. is a left view of a concrete distributor proposed by the present invention;

[0017] Figure 3 FIG. is a front view of a concrete distributor proposed by the present invention;

[0018] Figure 4 FIG. is a top view of a concrete distributor proposed by the present invention;

[0019] Figure 5 FIG. is a bottom view of a concrete distributor proposed by the present invention;

[0020] Figure 6 FIG. is a combined schematic diagram of a self-cleaning and anti-splashing device and a fast forward and slow return defoaming device;

[0021] Figure 7 FIG. is a schematic diagram of the structure of a fast forward and slow return defoaming device;

[0022] Figure 8 FIG. is a cross-sectional view of a fast forward and slow return defoaming device;

[0023] Figure 9 FIG. is a schematic diagram of the structure of a self-cleaning and anti-splashing device;

[0024] Figure 10 FIG. is a cross-sectional view of a self-cleaning and anti-splashing device;

[0025] Figure 11 FIG. is a schematic diagram of the structure of a supporting base plate;

[0026] Figure 12 FIG. is a schematic diagram of the structure of a concrete mixing and discharging mechanism;

[0027] Figure 13 FIG. is a cross-sectional view of a concrete mixing and discharging mechanism;

[0028] Figure 14 FIG. is a schematic diagram of the structure of a force-assisted moving part;

[0029] Figure 15 It is a structural schematic diagram of a fixed limiting plate;

[0030] Figure 16 This is the fast-forward defoaming state diagram of the fast-forward and slow-return defoaming device;

[0031] Figure 17 This is a diagram of the slow return and withdrawal state of the fast-in and slow-return defoaming device.

[0032] Among them, 1. material placing car, 2. concrete mixing and discharging mechanism, 3. self-cleaning anti-splashing device, 4. fast-forward and slow-return defoaming device, 5. fixed limit plate, 6. connecting rod assembly, 7. defoaming trigger column, 8. defoaming motor, 9. driving rod, 10. linkage rod, 11. limit rod, 12. transmission rod, 13. connecting rod, 14. trigger pressure plate, 15. directional block, 16. directional slide, 17. supporting bottom plate, 18. anti-splashing cylinder, 19. torsion groove , 20. Rebound pressure-driven scraping device, 21. Fixed frame, 22. Spring, 23. Pressure plate, 24. Torsion column, 25. Scraping plate, 26. Through groove, 27. Scraping slide groove, 28. Engaging disk, 29. Engaging groove, 30. Mixing cylinder, 31. Stirring and mixing rod, 32. Concrete pump, 33. Mixing motor, 34. Feed inlet, 35. Leverage moving part, 36. Moving gear, 37. Leverage gear, 38. Leverage belt, 39. Engaging groove.

[0033] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] like Figure 1 , Figure 3 , Figure 4 , Figure 5As shown in the figure, the present invention provides a concrete placing boom, which includes a placing vehicle 1, a concrete mixing and discharging mechanism 2, a self-cleaning and splash-proof device 3, and a fast-forward and slow-return defoaming device 4. The concrete mixing and discharging mechanism 2 is arranged on the placing vehicle 1, the self-cleaning and splash-proof device 3 is arranged on the placing vehicle 1, the self-cleaning and splash-proof device 3 is arranged below the concrete mixing and discharging mechanism 2, the fast-forward and slow-return defoaming device 4 is arranged on the placing vehicle 1, and the fast-forward and slow-return defoaming device 4 is in contact with the self-cleaning and splash-proof device 3.

[0037] As Figure 1 , Figure 12 , Figure 13 , Figure 14 As shown in the figure, a force-assisted moving member 35 is arranged on the placing vehicle 1. The force-assisted moving member 35 includes a moving gear 36, a force-assisted gear 37, and a force-assisted belt 38. The moving gear 36 is arranged on the axle of the placing vehicle 1, the force-assisted gear 37 is rotatably arranged on the outer side wall of the mixing cylinder 30, the force-assisted gear 37 is connected to the stirring and mixing rod 31, the force-assisted belt 38 is sleeved on the moving gear 36 and the force-assisted gear 37, and a clamping groove 39 is arranged on the inner side wall of the force-assisted belt 38. The clamping groove 39 is meshed and connected with the moving gear 36 and the force-assisted gear 37.

[0038] As Figure 1 , Figure 12 , Figure 13 As shown in the figure, the concrete mixing and discharging mechanism 2 includes a mixing cylinder 30, a stirring and mixing rod 31, a concrete pump 32, and a mixing motor 33. The mixing cylinder 30 is arranged on the placing vehicle 1, the stirring and mixing rod 31 is rotatably arranged in the mixing cylinder 30, the concrete pump 32 is arranged on the placing vehicle 1, the concrete pump 32 is connected to the mixing cylinder 30 in a penetrating manner, the mixing motor 33 is arranged on the placing vehicle 1, the output end of the mixing motor 33 is connected to the stirring and mixing rod 31, and a feeding port 34 is arranged on the mixing cylinder 30.

[0039] As Figure 1 , Figure 9 , Figure 10 , Figure 11As shown in the figure, the self-cleaning anti-splash device 3 includes a supporting bottom plate 17, an anti-splash cylinder 18, a torsion groove 19, and a spring-back pressing and scraping device 20. The supporting bottom plate 17 is arranged on the cloth truck 1, the anti-splash cylinder 18 is snap-fitted and rotatably arranged on the supporting bottom plate 17, the torsion groove 19 is spirally arranged on the outer circumferential wall of the anti-splash cylinder 18, the spring-back pressing and scraping device 20 is arranged on the supporting bottom plate 17, and the spring-back pressing and scraping device 20 is in contact with the defoaming trigger post 7; the spring-back pressing and scraping device 20 includes a fixed frame 21, a spring 22, a pressing plate 23, a torsion post 24, and a scraping plate 25. The fixed frame 21 is arranged on the supporting bottom plate 17, the pressing plate 23 is snap-fitted and slidably arranged in the fixed frame 21, one end of the spring 22 is arranged on the inner upper wall of the fixed frame 21, the other end of the spring 22 is connected to the pressing plate 23, the torsion post 24 is arranged on the pressing plate 23, the torsion post 24 is matched with the torsion groove 19, the scraping plate 25 is arranged on the fixed frame 21, and the scraping plate 25 fits the inner wall of the anti-splash cylinder 18; a through groove 26 is arranged on one side wall of the fixed frame 21, the trigger pressing plate 14 rises and falls in the through groove 26, a scraping chute 27 is arranged on the other opposite side wall of the fixed frame 21, and the torsion post 24 rises and falls in the scraping chute 27; a snap-fitting plate 28 is arranged on the supporting bottom plate 17, a snap-fitting groove 29 is arranged on the bottom wall of the anti-splash cylinder 18, and the anti-splash cylinder 18 is snap-fitted and rotatably arranged on the snap-fitting plate 28 through the snap-fitting groove 29.

[0040] As Figure 1 , Figure 2 , Figure 6 , Figure 7 , Figure 8 , Figure 15 , Figure 16 , Figure 17 As shown in the figure, the fast-forward and slow-return defoaming device 4 includes a fixed limit plate 5, a connecting rod assembly 6, a defoaming trigger post 7, and a defoaming motor 8. The fixed limit plate 5 is arranged on the cloth truck 1, the connecting rod assembly 6 is rotatably arranged on the fixed limit plate 5, the defoaming trigger post 7 is hinged to the connecting rod assembly 6, the defoaming motor 8 is arranged on the fixed limit plate 5, and the output end of the defoaming motor 8 is connected to the connecting rod assembly 6; the connecting rod assembly 6 includes a driving rod 9, a linkage rod 10, a limiting rod 11, a transmission rod 12, and a connecting rod 13. One end of the driving rod 9 is rotatably arranged on the fixed limit plate 5, one end of the linkage rod 10 is hinged to the other end of the driving rod 9, one end of the limiting rod 11 is rotatably arranged on the fixed limit plate 5, the other end of the limiting rod 11 is hinged to the other end of the linkage rod 10, one end of the transmission rod 12 is hinged at the hinge point of the limiting rod 11 and the linkage rod 10, one end of the connecting rod 13 is hinged to the other end of the transmission rod 12, and the other end of the connecting rod 13 is hinged to the defoaming trigger post 7; a trigger pressing plate 14 and an orientation block 15 are arranged on the side wall of the defoaming trigger post 7; an orientation chute 16 is arranged on the fixed limit plate 5, and the orientation block 15 is snap-fitted and slidably arranged in the orientation chute 16.

[0041] During specific use, move the cloth car 1 to the concrete placing position, put the concrete into the mixing cylinder 30 through the feeding port 34, start the mixing motor 33, the rotation of the mixing motor 33 drives the rotation of the stirring and mixing rod 31, and the rotation of the stirring and mixing rod 31 stirs the concrete in the mixing cylinder 30, effectively preventing the segregation of the concrete. With the rotation of the stirring and mixing rod 31, the force - borrowing gear 37 is driven to rotate, the rotation of the force - borrowing gear 37 drives the rotation of the force - borrowing belt 38, the rotation of the force - borrowing belt 38 drives the rotation of the moving gear 36, and the rotation of the moving gear 36 drives the cloth car 1 to move forward. Start the concrete pump 32, the concrete pump 32 pumps the concrete out of the mixing cylinder 30 and transports it to the anti - splashing cylinder 18, and it falls through the anti - splashing cylinder 18. Start the defoaming motor 8, the rotation of the defoaming motor 8 drives the rotation of the driving rod 9, the rotation of the driving rod 9 drives the rotation of the linkage rod 10, the rotation of the linkage rod 10 drives the rotation of the limiting rod 11 and the transmission rod 12, the rotation of the transmission rod 12 drives the rotation of the connecting rod 13, and the rotation of the connecting rod 13 drives the lifting of the defoaming trigger column 7. The lifting of the defoaming column vibrates the concrete, effectively discharging the air bubbles in the concrete, making the concrete more dense, improving the strength and durability of the concrete, and ensuring the uniform distribution of the concrete. When the defoaming column descends, the rotation angle of the driving rod 9 is much smaller than the rotation angle when the defoaming column ascends. Therefore, the technical effect of fast insertion and slow extraction can be achieved, effectively reducing the chance of air bubbles being brought into the interior of the concrete. When the defoaming trigger column 7 lifts and lowers, it drives the trigger pressing plate 14 to lift and lower at the same time. When the trigger pressing plate 14 descends, it presses the pressing plate 23, and the pressing plate 23 is pressed and descends. At this time, the spring 22 elongates. The descent of the pressing plate 23 drives the descent of the torsion column 24. After the torsion column 24 enters the torsion groove 19 along with the descent of the pressing plate 23, under the guidance of the spiral structure of the torsion groove 19, it drives the anti - splashing cylinder 18 to rotate. At this time, the scraping plate 25 closely adheres to the inner wall of the anti - splashing cylinder 18 and scrapes off the adhered concrete. When the extrusion force of the trigger pressing plate 14 on the pressing plate 23 disappears when the trigger pressing plate 14 ascends, the pressing plate 23 rises and resets under the action of the spring 22. The ascent of the pressing plate 23 drives the ascent of the torsion column 24. Under the action of the torsion groove 19, the ascent of the torsion column 24 drives the anti - splashing cylinder 18 to rotate back and reset, achieving the technical effect of reciprocating scraping and cleaning of the anti - splashing cylinder 18. The above is the specific working process of the present invention. Just repeat this step during the next use.

[0042] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the foregoing and their equivalents.

[0044] The above description of the present invention and its embodiments is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In general, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the present invention, design similar structural forms and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A concrete placing boom, characterized in that: It includes a cloth truck (1), a concrete mixing and discharging mechanism (2), a self-cleaning and splash-proof device (3), and a fast-forward and slow-return defoaming device (4). The concrete mixing and discharging mechanism (2) is arranged on the cloth truck (1). The self-cleaning and splash-proof device (3) is arranged on the cloth truck (1). The self-cleaning and splash-proof device (3) is arranged below the concrete mixing and discharging mechanism (2). The fast-forward and slow-return defoaming device (4) is arranged on the cloth truck (1). The fast-forward and slow-return defoaming device (4) is in contact with the self-cleaning and splash-proof device (3). The fast-forward and slow-return defoaming device (4) includes a fixed limit plate (5), a connecting rod assembly (6), a defoaming trigger column (7), and a defoaming motor (8). The fixed limit plate (5) is arranged on the cloth truck (1). The connecting rod assembly (6) is rotatably arranged on the fixed limit plate (5). The defoaming trigger column (7) is hinged to the connecting rod assembly (6). The defoaming motor (8) is arranged on the fixed limit plate (5). The output end of the defoaming motor (8) is connected to the connecting rod assembly (6). The connecting rod assembly (6) includes a driving rod (9), a linkage rod (10), a limiting rod (11), a transmission rod (12), and a connecting rod (13). One end of the driving rod (9) is rotatably arranged on the fixed limit plate (5). One end of the linkage rod (10) is hinged to the other end of the driving rod (9). One end of the limiting rod (11) is rotatably arranged on the fixed limit plate (5). The other end of the limiting rod (11) is hinged to the other end of the linkage rod (10). One end of the transmission rod (12) is hinged at the hinge point of the limiting rod (11) and the linkage rod (10). One end of the connecting rod (13) is hinged to the other end of the transmission rod (12). The other end of the connecting rod (13) is hinged to the defoaming trigger column (7). A trigger pressing plate (14) and an orientation block (15) are arranged on the side wall of the defoaming trigger column (7). An orientation sliding groove (16) is arranged on the fixed limit plate (5). The orientation block (15) is engaged and slidably arranged in the orientation sliding groove (16). The self-cleaning and splash-proof device (3) includes a supporting bottom plate (17), a splash-proof cylinder (18), a torsion groove (19), and a rebound pressing and scraping device (20). The supporting bottom plate (17) is arranged on the cloth truck (1). The splash-proof cylinder (18) is engaged and rotatably arranged on the supporting bottom plate (17). The torsion groove (19) is spirally arranged on the outer circumferential wall of the splash-proof cylinder (18). The rebound pressing and scraping device (20) is arranged on the supporting bottom plate (17). The rebound pressing and scraping device (20) is in contact with the defoaming trigger column (7).The rebound pressing and scraping device (20) includes a fixed frame (21), a spring (22), a pressing plate (23), a torsion column (24) and a scraping plate (25). The fixed frame (21) is arranged on the supporting bottom plate (17). The pressing plate (23) is clamped and slidably arranged in the fixed frame (21). One end of the spring (22) is arranged on the inner upper wall of the fixed frame (21), and the other end of the spring (22) is connected to the pressing plate (23). The torsion column (24) is arranged on the pressing plate (23), and the torsion column (24) is matched with the torsion groove (19). The scraping plate (25) is arranged on the fixed frame (21), and the scraping plate (25) fits against the inner wall of the anti-splash cylinder (18). The trigger pressing plate (14) descends to squeeze the pressing plate (23).; 2. The concrete placing boom according to claim 1, characterized in that: A through groove (26) is provided on one side wall of the fixed frame (21), and a scraping chute (27) is provided on the other opposite side wall of the fixed frame (21).

3. The concrete placing boom according to claim 2, wherein: A clamping disc (28) is provided on the supporting bottom plate (17), a clamping groove (29) is provided on the bottom wall of the anti-splash cylinder (18), and the anti-splash cylinder (18) is rotatably clamped on the clamping disc (28) through the clamping groove (29).

4. A concrete placing boom according to claim 3, characterized in that: The concrete mixing and discharging mechanism (2) includes a mixing cylinder (30), a stirring and mixing rod (31), a concrete pump (32) and a mixing motor (33). The mixing cylinder (30) is arranged on the concrete distributing vehicle (1), the stirring and mixing rod (31) is rotatably arranged in the mixing cylinder (30), the concrete pump (32) is arranged on the concrete distributing vehicle (1), the concrete pump (32) is connected to the mixing cylinder (30) in a penetrating manner, the mixing motor (33) is arranged on the concrete distributing vehicle (1), the output end of the mixing motor (33) is connected to the stirring and mixing rod (31), and a feed inlet (34) is provided on the mixing cylinder (30).

5. A concrete placing boom according to claim 4, characterized in that: A force-assisted moving member (35) is provided on the concrete distributing vehicle (1). The force-assisted moving member (35) includes a moving gear (36), a force-assisted gear (37) and a force-assisted belt (38). The moving gear (36) is arranged on the axle of the concrete distributing vehicle (1), the force-assisted gear (37) is rotatably arranged on the outer side wall of the mixing cylinder (30), the force-assisted gear (37) is connected to the stirring and mixing rod (31), the force-assisted belt (38) is sleeved on the moving gear (36) and the force-assisted gear (37), and a clamping groove (39) is provided on the inner side wall of the force-assisted belt (38). The clamping groove (39) is meshed and connected to the moving gear (36) and the force-assisted gear (37).

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