Horizontal concrete mixer and mixing structure thereof

Abstract

The invention relates to the field of concrete mixing, and particularly discloses a horizontal concrete mixer and a mixing structure thereof, the horizontal concrete mixer comprises two parallel main shafts, a plurality of mixing paddles are fixed on the peripheries of the main shafts, each mixing paddle comprises a fixed seat, a clamping seat, a paddle rod and a main paddle blade, the fixed seats are fixedly arranged on the peripheries of the main shafts, the clamping seats are clamped on the fixed seats, and the main paddle blades are fixed on the fixed seats. A fixing plate is fixed to the end, away from the main shaft, of the paddle rod, the main paddle is fixed to the fixing plate, a center rod which is parallel to the axis direction of the main shaft and penetrates through the paddle rod is rotationally connected into the paddle rod, cranks are fixed to the two ends of the center rod, the stirring paddle rotates along with rotation of the main shaft, and concrete is stirred through the main paddle in the concrete stirring process of the stirring paddle. Due to the eccentric arrangement of the two auxiliary paddles on the paddle rod, the two auxiliary paddles generate disordered rotary swing, so that the stirring effect between the adjacent stirring paddles is improved, the generation of agglomerates in concrete is reduced, and the stirring efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of concrete mixing, in particular to a horizontal concrete mixer and a mixing structure thereof. Background Art

[0002] A concrete mixer is a machine that mixes cement, sand and gravel aggregates and water to make a concrete mixture. Among them, a horizontal concrete mixer mainly drives the stirring paddle on it to rotate by rotating the main shaft, thereby achieving mixing of the concrete. During the stirring process of the concrete by the stirring paddle, the concrete between adjacent stirring paddles does not directly contact the stirring paddle. Even if the viscosity of the concrete will drive the concrete between adjacent stirring paddles to produce a certain flow, the stirring effect of the concrete in this part is still not ideal, and then this part of the concrete may produce agglomerates. Therefore, traditional horizontal mixers will extend the stirring time to reduce the generation of agglomerates, resulting in long stirring time and low stirring efficiency. Summary of the invention

[0003] The object of the present invention is to provide a horizontal concrete mixer and a mixing structure thereof, so as to overcome the above-mentioned defects in the prior art.

[0004] A stirring structure according to the present invention comprises two parallel main shafts, a plurality of stirring paddles are fixed on the outer circumference of the main shaft, the stirring paddles comprise a fixing seat, a clamping seat, a paddle rod and a main paddle blade, the fixing seat is fixed on the outer circumference of the main shaft, the clamping seat is clamped on the fixing seat, a fixing plate is fixed on the end of the paddle rod away from the main shaft, the main paddle blade is fixed on the fixing plate, a center rod parallel to the axis direction of the main shaft and passing through the paddle rod is rotatably connected inside the paddle rod, cranks are fixed at both ends of the center rod, a line connecting the ends of the two cranks away from the center rod intersects with the axis of the center rod, a fixing sleeve parallel to the axis of the center rod is fixed on the end of the crank away from the center rod, a fixing rod is fixed inside the fixing sleeve, and a spiral auxiliary paddle blade is fixed on the outer circumference of the fixing rod.

[0005] Through the above technical solution, the stirring paddle rotates with the main shaft, and the main paddle blade stirs the concrete. During the process of the stirring paddle stirring the concrete, the two auxiliary paddle blades on the paddle rod produce disordered rotation and swing due to the eccentric setting, thereby increasing the stirring effect between adjacent stirring paddles, thereby reducing the generation of agglomerates in the concrete, shortening the stirring time, and improving the stirring efficiency.

[0006] Preferably, limit rings are spline-connected on the shaft necks at both ends of the center rod, a through hole is provided on the crank, the shaft neck of the limit ring passes through the through hole on the crank, a plurality of limit pins are fixedly provided on the side of the limit ring away from the paddle rod, a limit hole corresponding to the limit pin is provided on the crank, the limit pin is embedded in the limit hole, an internal thread is provided on the part of the shaft neck of the center rod located on the outside of the crank, a nut is threadedly connected to the part of the shaft neck of the center rod where the thread is provided, and the nut can cooperate with the limit ring to clamp the crank.

[0007] The above technical solution facilitates assembly and disassembly of the crank and the center rod. The limit pin is inserted into the limit hole, and the limit ring is spline-connected to the center rod, so that the crank and the center rod can remain fixed when the nut and the limit ring clamp the crank.

[0008] Preferably, a cavity is provided in the paddle rod, the center rod passes through the cavity, and slide grooves are provided on both sides of the cavity in the length direction of the paddle rod. A deflection block is fixed on the center rod, and the deflection block is located in the cavity. Four outwardly extending protrusions in a plum blossom shape are provided on the outer periphery of the deflection block. A pressure block is slidably connected in the slide groove, and a spring is fixed between a side of the deflection block away from the center rod and a side wall of the slide groove away from the center rod.

[0009] Through the above technical solution, under the elastic force of the spring, the deflection block rotates with the fixed rod, reducing the dead point position during the rotation of the fixed rod, ensuring that the fixed rod can swing continuously.

[0010] Preferably, a mounting groove is provided on one side of the paddle rod perpendicular to the main shaft axis, the slide groove and the cavity are provided on the bottom wall of the mounting groove, a cover body is embedded in the mounting groove, a semi-slide groove and a semi-cavity are provided on one side of the cover body close to the paddle rod and on the bottom wall of the mounting groove, the slide groove is composed of two semi-slide grooves, the cavity is composed of two semi-cavities, the center rod passes through the cover body, and the cover body and the paddle rod are fixedly connected by bolts.

[0011] Through the above technical solution and the setting of the cover body, the installation convenience of the deflection block, the pressure block and the spring is increased, and their replacement is convenient.

[0012] Preferably, an arc-shaped limit groove is provided in the fixing seat, and the arc-shaped limit groove is open at one end along the circumference of the main shaft, and an arc-shaped through groove connected with the arc-shaped limit groove is provided on the outer periphery of the fixing seat, and the end of the arc-shaped through groove close to the opening of the arc-shaped limit groove is also open, and the width of the arc-shaped through groove in the axis direction of the main shaft is smaller than the width of the arc-shaped limit groove, and an arc-shaped clamping block consistent with the width of the arc-shaped through groove is fixed on one side of the clamping seat close to the main shaft, and an arc-shaped limit block consistent with the width of the arc-shaped limit groove is fixed on the lower side of the arc-shaped clamping block, and the arc-shaped limit block is embedded in the arc-shaped limit groove, and the arc-shaped clamping block is embedded in the arc-shaped through groove.

[0013] Through the above technical solution, the fixing seat is fixed on the outer periphery of the main shaft, and the clamping seat is clamped in the fixing seat through the arc limit block and the clamping ring, thereby increasing the convenience of disassembly and assembly of the stirring paddle and the main shaft, thereby making it convenient to repair and replace the stirring paddle.

[0014] Preferably, the fixing seat is provided with a plurality of first circular holes that penetrate the fixing seat and the arc-shaped limit groove along the axis direction of the main shaft, the arc-shaped limit block is provided with a second circular hole corresponding to the first circular hole, the second circular hole penetrates the arc-shaped limit block, a limit rod that penetrates the first circular hole and the second circular hole is arranged in the first circular hole, one end of the limit rod is fixed with a limit end that abuts against one end face of the fixing seat, the other end of the limit rod is provided with a clamping groove on the outer periphery, a clamping ring is clamped in the clamping groove, and the clamping ring abuts against the other end face of the fixing seat.

[0015] Through the above technical solution, the setting of the limit rod improves the connection firmness between the arc-shaped limit block and the fixing seat, and the clamping ring is clamped into the clamping groove to ensure that the limit rod is confined in the fixing seat.

[0016] Preferably, a first blocking block is embedded in one end of the opening of the arc-shaped limiting groove, a second blocking block is fixedly provided on a side of the first blocking block away from the main axis, and the second blocking block is embedded in the opening of the arc-shaped through groove.

[0017] Through the above technical solution, the provision of the first blocking block and the second blocking block can reduce the amount of concrete entering the arc-shaped limiting groove and the arc-shaped through groove.

[0018] The present invention also provides a horizontal concrete mixer, comprising a bracket, a lifting bucket and a mixing drum, wherein the mixing structure is installed in the mixing drum, the main shaft is connected to a power system on one side of the mixing drum, the power system comprises an energy-saving motor and a reduction gearbox, the main shaft is connected to the energy-saving motor via the reduction gearbox, and the reduction gearbox is driven to rotate by the energy-saving motor, thereby driving the main shaft to rotate.

[0019] Through the above technical solution, the power system drives the main shaft to rotate, the concrete is placed in the mixing drum, and the main shaft drives the stirring paddle to rotate to achieve mixing of the concrete.

[0020] The beneficial effects of the present invention are as follows: the stirring paddle rotates with the main shaft, the main paddle blade stirs the concrete, and during the process of the stirring paddle stirring the concrete, the two auxiliary paddle blades on the paddle rod are eccentrically arranged, so that the two auxiliary paddle blades produce disordered rotation and swing, thereby increasing the stirring effect between adjacent stirring paddles, thereby reducing the generation of agglomerates in the concrete, shortening the stirring time, and improving the stirring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the mixing drum in the present invention; Figure 3 It is a structural schematic diagram of the stirring structure in the present invention; Figure 4 It is a schematic diagram of the structure of the stirring paddle in the present invention; Figure 5 is an exploded view of the stirring paddle in the present invention; Figure 6 It is a schematic diagram of the structure of the limit rod and the clamping ring in the present invention; Figure 7 It is a schematic diagram of the structure of the crank and the limiting ring in the present invention; Figure 8 is a cross-sectional schematic diagram of a stirring paddle in the present invention; Fig. 9 The present invention Figure 8 The enlarged schematic diagram at A in the middle; Fig.10 It is a structural schematic diagram of the deflection block in the present invention; Fig.11 It is a structural schematic diagram of the fixing seat in the present invention; Fig.12 It is a structural schematic diagram of the arc-shaped limit block in the present invention; Fig.13 It is a structural schematic diagram of the first blocking block in the present invention.

[0022] In the figure: 1. Bracket; 2. Lifting bucket; 3. Mixing drum; 4. Mixing paddle; 40. Paddle rod; 401. Mounting slot; 41. Main paddle blade; 42. Fixing plate; 43. Cover; 50. Main shaft; 60. Secondary paddle blade; 61. Fixing rod; 62. Crank; 621. Fixing sleeve; 622. Limiting hole; 63. Nut; 64. Limiting ring; 641. Limiting pin; 65. Center rod; 70. Fixing seat; 701. First round hole; 7 02, arc-shaped limit groove; 703, arc-shaped through groove; 71, clamping seat; 72, limit rod; 721, clamping groove; 722, limit end; 73, clamping ring; 74, arc-shaped limit block; 741, second round hole; 75, first blocking block; 76, second blocking block; 77, arc-shaped clamping block; 80, deflection block; 81, pressure block; 82, spring; 90, slide groove; 90a, semi-slide groove; 91, cavity; 91a, semi-cavity. DETAILED DESCRIPTION

[0023] 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" and the like indicate directions or positional relationships based on the attached Figure 1The orientation or positional relationship shown is only for the convenience of simplifying the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described in conjunction with the embodiments below. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention. As used herein, the terms up, down and left, right are not limited to their strict geometric definitions, but include reasonable and inconsistent tolerances for machining or human errors. The specific features of the horizontal concrete mixer and its mixing structure are described in detail below: An embodiment of the present invention: Reference Figure 2-Figure 13 The present invention provides a horizontal concrete mixer and a mixing structure thereof, comprising two parallel main shafts 50, a plurality of stirring paddles 4 are fixed on the outer periphery of the main shaft 50, the stirring paddle 4 comprises a fixing seat 70, a clamping seat 71, a paddle rod 40 and a main paddle blade 41, the fixing seat 70 is fixed on the outer periphery of the main shaft 50, the clamping seat 71 is clamped on the fixing seat 70, a fixing plate 42 is fixed on one end of the paddle rod 40 away from the main shaft 50, the main paddle blade 41 is fixed on the fixing plate 42, and a central rod 6 parallel to the axis direction of the main shaft 50 and penetrating the paddle rod 40 is rotatably connected inside the paddle rod 40 5. Cranks 62 are fixed at both ends of the center rod 65. The line between the ends of the two cranks 62 away from the center rod 65 intersects with the axis of the center rod 65. A fixing sleeve 621 parallel to the axis of the center rod 65 is fixed at the end of the crank 62 away from the center rod 65. A fixing rod 61 is fixed in the fixing sleeve 621. A spiral auxiliary blade 60 is fixed on the outer periphery of the fixing rod 61 through a connecting rod. The cross section of the auxiliary blade 60 is elliptical, so that the spiral auxiliary blade 60 can be subjected to uneven force at various locations during the mixing of concrete, thereby increasing the swing effect of the auxiliary blade 60.

[0025] Reference Figure 5 , Figure 8 , Fig. 9The splines on the shaft necks at both ends of the center rod 65 are connected to the limit ring 64 (the spline grooves on the outer periphery of the center rod 65 are not drawn, and the splines on the limit ring 64 are not drawn), a through hole is provided on the crank 62, and the shaft neck of the limit ring 64 passes through the through hole on the crank 62, and a plurality of limit pins 641 are fixedly provided on the side of the limit ring 64 away from the paddle rod 40, and a limit hole 622 corresponding to the limit pin 641 is provided on the crank 62, and the limit pin 641 is embedded in the limit hole 622, and the length of the limit pin 641 is consistent with the thickness of the crank 62, and the part of the shaft neck of the center rod 65 located on the outside of the crank 62 is provided with an internal thread, and the part of the shaft neck of the center rod 65 with a thread is threadedly connected with a nut 63, and the nut 63 can cooperate with the limit ring 64 to clamp the crank 62.

[0026] Reference Figure 5 , Figure 8-Figure 10 A cavity 91 is provided in the paddle rod 40, and the center rod 65 passes through the cavity 91. The cavity 91 is connected to the paddle rod 40 on both sides in the length direction thereof and is provided with a slide groove 90. A deflection block 80 is fixed on the center rod 65. The deflection block 80 is made of stainless steel. The deflection block 80 is located in the cavity 91. Four protrusions extending outward are provided on the outer periphery of the deflection block 80 in a plum blossom shape. The angle between the protrusion on the deflection block 80 and the adjacent crank 62 is forty-five degrees. A pressing block 81 is slidably connected in the slide groove 90. The pressing block 81 is made of copper. In order to reduce the friction between the deflection block 80 and the pressure block 81, the cavity 91 is filled with grease to further reduce the friction between the deflection block 80 and the pressure block 81. A spring 82 is fixed between the side of the deflection block 80 away from the center rod 65 and the side wall of the slide groove 90 away from the center rod 65. The side of the pressure block 81 close to the deflection block 80 is an arc surface. When the spring 82 is in a relaxed state, the two side edges of the arc surface on the pressure block 81 are flush with the inner wall of the cavity 91, and the curvature of the arc surface on the pressure block 81 is smaller than the curvature of the side wall of the cavity 91.

[0027] Reference Figure 5 , Figure 8-Figure 10 , Fig.12 A mounting groove 401 is provided on one side of the propeller rod 40 perpendicular to the axis of the main shaft 50, a slide groove 90 and a cavity 91 are provided on the bottom wall of the mounting groove 401, a cover body 43 is embedded in the mounting groove 401, a semi-slide groove 90a and a semi-cavity 91a are provided on one side of the cover body 43 close to the propeller rod 40 and on the bottom wall of the mounting groove 401, the slide groove 90 is composed of two semi-slide grooves 90a, the cavity 91 is composed of two semi-cavities 91a, the center rod 65 passes through the cover body 43, and the cover body 43 and the propeller rod 40 are fixedly connected by bolts (the threads on the bolts are not drawn), and the arrangement of the cover body 43 improves the convenience of replacing and repairing the deflection block 80 and the pressure block 81.

[0028] Reference Figure 5 , Figure 11-13An arc-shaped limiting groove 702 is provided in the fixed seat 70, and the arc-shaped limiting groove 702 is opened at one end along the circumference of the main shaft 50. An arc-shaped through groove 703 connected to the arc-shaped limiting groove 702 is provided on the outer periphery of the fixed seat 70, and the end of the arc-shaped through groove 703 close to the opening of the arc-shaped limiting groove 702 is also opened. The width of the arc-shaped through groove 703 in the axial direction of the main shaft 50 is smaller than the width of the arc-shaped limiting groove 702. An arc-shaped clamping block 77 with the same width as the arc-shaped through groove 703 is fixed on one side of the clamping seat 71 close to the main shaft 50, and an arc-shaped limiting block 74 with the same width as the arc-shaped limiting groove 702 is fixed on the lower side of the arc-shaped clamping block 77. The arc-shaped limiting block 74 is embedded in the arc-shaped limiting groove 702, and the arc-shaped clamping block 77 is embedded in the arc-shaped through groove 703.

[0029] Reference Figure 5 , Figure 6 , Fig.11 , Fig.12 The fixing seat 70 is provided with a plurality of first circular holes 701 penetrating the fixing seat 70 and the arc-shaped limiting groove 702 along the axial direction of the main shaft 50, and the arc-shaped limiting block 74 is provided with a second circular hole 741 corresponding to the first circular hole 701, and the second circular hole 741 penetrates the arc-shaped limiting block 74, and a limiting rod 72 penetrating the first circular hole 701 and the second circular hole 741 is arranged in the first circular hole 701, and a limiting end 722 abutting against an end face of one side of the fixing seat 70 is fixed at one end of the limiting rod 72, and a clamping groove 721 is provided on the outer periphery of the other end of the limiting rod 72, and a clamping ring 73 is clamped in the clamping groove 721, and the clamping ring 73 abuts against the end face of the other side of the fixing seat 70.

[0030] Reference Fig.11 , Fig.13 A first blocking block 75 is embedded in one end of the opening of the arc-shaped limiting groove 702, and a second blocking block 76 is fixedly provided on a side of the first blocking block 75 away from the main shaft 50. The second blocking block 76 is embedded in the opening of the arc-shaped through groove 703. The second blocking block 76 is made of rubber material. When the second blocking block 76 is embedded in the arc-shaped through groove 703, the second blocking block 76 is in a compressed state.

[0031] Reference Figure 1 , Figure 2 The present invention also provides a horizontal concrete mixer, comprising a support 1, a lifting bucket 2 and a mixing drum 3, wherein the mixing structure is installed in the mixing drum 3, and a main shaft 50 is connected to a power system on one side of the mixing drum 3, wherein the power system comprises an energy-saving motor (hereinafter referred to as a first energy-saving motor) and a reduction gearbox, wherein the main shaft 50 is connected to the first energy-saving motor via the reduction gearbox, and the first energy-saving motor drives the reduction gearbox to rotate, thereby driving the main shaft 50 to rotate; The lifting bucket 2 is raised and lowered by a lifting system, which includes another energy-saving motor (hereinafter referred to as the second energy-saving motor), a winch, and a cable. The winch is fixed on the second energy-saving motor, and the cable is wound on the winch. The other end of the cable is connected to the lifting bucket 2. When the second energy-saving motor is started, the winch rotates forward (or reversely), thereby realizing the winding (or releasing) of the cable.

[0032] The first energy-saving motor and the second energy-saving motor can use the high-efficiency energy-saving motor of Shanghai Motor YE3-132S-4-5.5KW.

[0033] During use of the present invention, the lifting system is started, and the second energy-saving motor drives the winch to rotate forward, and the cable is wound, so that the lifting bucket 2 lifts the dry concrete material to the upper side of the feed inlet of the mixing drum 3, so that the dry concrete material is poured into the mixing drum 3, and then the second energy-saving motor is reversed, and the lifting bucket 2 descends and resets, and the second energy-saving motor is turned off at this time.

[0034] Then, the power system is started, and the first energy-saving motor drives the main shaft 50 to rotate through the reduction gearbox, so that the stirring paddle 4 on the main shaft 50 rotates accordingly, and water is injected into the mixing drum 3. The main blade 41 on the stirring paddle 4 stirs the concrete, and the two auxiliary blades 60 on the stirring paddle 4 move in the concrete. Due to the uneven flow state of the concrete fluid and the spiral shape of the auxiliary blade 60, the auxiliary blade 60 is subjected to uneven force at various positions on the auxiliary blade 60 when it moves in the concrete fluid, and the force between the two auxiliary blades 60 is also uneven, which makes The auxiliary blade 60 swings, which in turn drives the two auxiliary blades 60 to swing around the center rod 65, which causes the center rod 65 to rotate back and forth, and then the deflection block 80 rotates back and forth. The pressing block 81 presses the protrusion on the deflection block 80 under the elastic force of the spring 82, so that the balance state of the auxiliary blade 60 during the movement can be always destroyed, thereby avoiding the auxiliary blade 60 from having a dead point position during the swinging process, ensuring that it can always swing, thereby increasing the mixing effect of the concrete between adjacent mixing paddles 4 and reducing the generation of agglomerates in the concrete.

[0035] Moreover, by driving the present invention to perform concrete mixing operations with an energy-saving motor, not only can energy consumption be saved and power consumption be reduced, but the energy-saving motor also has a longer service life, which can effectively increase the service life of the present invention.

[0036] It will be clear to those skilled in the art that various modifications may be made to the above embodiments without departing from the overall spirit and concept of the present invention. All of them fall within the protection scope of the present invention. The protection scheme of the present invention shall be subject to the claims attached to the present invention.

Claims

1. A stirring structure, characterized in that: The invention comprises two parallel main shafts (50), a plurality of stirring paddles (4) are fixed on the outer circumference of the main shaft (50), the stirring paddle (4) comprises a fixing seat (70), a clamping seat (71), a paddle rod (40) and a main paddle blade (41), the fixing seat (70) is fixed on the outer circumference of the main shaft (50), the clamping seat (71) is clamped on the fixing seat (70), a fixing plate (42) is fixed on one end of the paddle rod (40) away from the main shaft (50), the main paddle blade (41) is fixed on the fixing plate (42), and the paddle rod (40) is rotatably connected to the main paddle blade (41). A center rod (65) is provided which is parallel to the axis of the main shaft (50) and passes through the propeller rod (40). Cranks (62) are fixed to both ends of the center rod (65). A line connecting the ends of the two cranks (62) which are away from the center rod (65) intersects with the axis of the center rod (65). A fixing sleeve (621) which is parallel to the axis of the center rod (65) is fixed to the end of the crank (62) which is away from the center rod (65). A fixing rod (61) is fixed inside the fixing sleeve (621). A spiral auxiliary propeller blade (60) is fixed to the outer periphery of the fixing rod (61).

2. A stirring structure according to claim 1, characterized in that: The journals at both ends of the center rod (65) are spline-connected with limit rings (64); a through hole is provided on the crank (62); the journal of the limit ring (64) passes through the through hole on the crank (62); a plurality of limit pins (641) are fixedly provided on a side of the limit ring (64) away from the paddle rod (40); a limit hole (622) corresponding to the limit pin (641) is provided on the crank (62); the limit pin (641) is embedded in the limit hole (622); an internal thread is provided on a portion of the journal of the center rod (65) located outside the crank (62); a nut (63) is threadedly connected to a portion of the journal of the center rod (65) having a thread; the nut (63) can cooperate with the limit ring (64) to clamp the crank (62).

3. A stirring structure according to claim 2, characterized in that: A cavity (91) is provided in the paddle rod (40), the center rod (65) passes through the cavity (91), and a slide groove (90) is provided on both sides of the cavity (91) in the length direction of the paddle rod (40). A deflection block (80) is fixed on the center rod (65), and the deflection block (80) is located in the cavity (91). Four protrusions extending outward in a plum blossom shape are provided on the outer periphery of the deflection block (80), a pressure block (81) is slidably connected in the slide groove (90), and a spring (82) is fixed between a side of the deflection block (80) away from the center rod (65) and a side wall of the slide groove (90) away from the center rod (65).

4. A stirring structure according to claim 3, characterized in that: The paddle rod (40) is provided with a mounting groove (401) on one side perpendicular to the axis of the main shaft (50); the slide groove (90) and the cavity (91) are provided on the bottom wall of the mounting groove (401); a cover body (43) is embedded in the mounting groove (401); a semi-slide groove (90a) and a semi-cavity (91a) are provided on one side of the cover body (43) close to the paddle rod (40) and the bottom wall of the mounting groove (401); the slide groove (90) is composed of two semi-slide grooves (90a); the cavity (91) is composed of two semi-cavities (91a); the center rod (65) passes through the cover body (43); and the cover body (43) and the paddle rod (40) are fixedly connected by bolts.

5. A stirring structure according to claim 1, characterized in that: An arc-shaped limiting groove (702) is provided in the fixing seat (70), and one end of the arc-shaped limiting groove (702) is opened along the circumference of the main shaft (50). An arc-shaped through groove (703) connected to the arc-shaped limiting groove (702) is provided on the outer circumference of the fixing seat (70), and one end of the arc-shaped through groove (703) close to the opening of the arc-shaped limiting groove (702) is also opened. The width of the arc-shaped through groove (703) in the axial direction of the main shaft (50) is The arc-shaped limit groove (702) has a width smaller than that of the arc-shaped limit groove (702); a side of the clamping seat (71) close to the main shaft (50) is fixedly provided with an arc-shaped clamping block (77) having the same width as the arc-shaped through groove (703); a lower side of the arc-shaped clamping block (77) is fixedly provided with an arc-shaped limit block (74) having the same width as the arc-shaped limit groove (702); the arc-shaped limit block (74) is embedded in the arc-shaped limit groove (702); and the arc-shaped clamping block (77) is embedded in the arc-shaped through groove (703).

6. A stirring structure according to claim 5, characterized in that: The fixing seat (70) is provided with a plurality of first circular holes (701) penetrating the fixing seat (70) and the arc-shaped limiting groove (702) along the axial direction of the main shaft (50); the arc-shaped limiting block (74) is provided with a second circular hole (741) corresponding to the first circular hole (701); the second circular hole (741) penetrates the arc-shaped limiting block (74); a limiting rod (72) penetrating the first circular hole (701) and the second circular hole (741) is arranged in the first circular hole (701); a limiting end (722) abutting against an end surface of one side of the fixing seat (70) is fixedly provided at one end of the limiting rod (72); a clamping groove (721) is provided on the outer periphery of the other end of the limiting rod (72); a clamping ring (73) is clamped in the clamping groove (721); the clamping ring (73) abuts against the end surface of the other side of the fixing seat (70).

7. A stirring structure according to claim 5, characterized in that: A first blocking block (75) is embedded in one end of the opening of the arc-shaped limiting groove (702), a second blocking block (76) is fixedly provided on a surface of the first blocking block (75) away from the main shaft (50), and the second blocking block (76) is embedded in the opening of the arc-shaped through groove (703).

8. A horizontal concrete mixer, comprising a support (1), a lifting bucket (2) and a mixing drum (3), characterized in that: The stirring structure described in any one of claims 1 to 7 is installed in a stirring drum (3), and the main shaft (50) is connected to a power system on one side of the stirring drum (3).

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