Concrete trowelling machine

Abstract

The concrete trowelling machine comprises a machine body, a bottom plate is fixedly connected to the bottom end of the machine body, a trowelling plate is connected to the bottom of the bottom plate through a second spring, material taking racks are fixedly arranged on the two sides of the trowelling plate, stock bins are fixedly arranged on the sides, facing the bottom plate, of the material taking racks, and material conveying cavities are formed in the material taking racks. According to the concrete trowelling machine, the telescopic rod is used for driving the material taking plate to take materials, so that when the materials at the wall corner are excessive, the excessive materials at the wall corner can be rapidly and effectively collected while trowelling is carried out. When the wall corner is less in material, the concrete can be discharged through the stock bin while being flattened, the concrete is supplemented, if the shoveled concrete is temporarily stored on the material taking plate, the temporarily stored concrete is preferentially pushed out for filling, the shoveling effect of the material taking plate on the concrete is ensured, the temporarily stored concrete can be effectively prevented from being dried, and the construction efficiency is improved. The concrete waste is effectively reduced while the concrete treatment convenience at the wall corner is improved.

Description

Technical Field

[0001] The invention relates to the field of concrete, in particular to a concrete trowel. Background Art

[0002] In the process of building structure construction, concrete leveling is an important process. In the existing equipment, when leveling indoor concrete, it is difficult to level the concrete in the corners. It is often necessary to manually remove the concrete in the corners, fill the areas with less concrete, and finally level it manually. When leveling the corners, in order to avoid affecting the leveled concrete, the process is relatively complicated and consumes a lot of manpower and time costs. Summary of the invention

[0003] The purpose of the present invention is to provide a concrete trowel to solve the above problems.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: a concrete trowel, comprising a fuselage, a bottom end of the fuselage is fixedly connected to a bottom plate, the bottom of the bottom plate is connected to a trowel plate through a second spring, a guide frame is fixed to the top of the trowel plate, the bottom plate is slidably arranged in the guide frame, a vibration motor is fixed to the bottom plate, a guide rail is fixed to one side of the top of the trowel plate, a first connecting plate is slidably arranged on the upper side of the guide rail, a rotatably connected trowel plate is arranged on the side of the first connecting plate, a moving mechanism is arranged on the trowel plate, the moving mechanism can drive the first connecting plate and the trowel plate to move back and forth, and a material taking frame is fixed to both sides of the trowel plate;

[0005] The material taking frame is fixedly provided with a bin towards one side of the bottom plate, and a discharging rack is fixed at the bottom of the bin, and a valve mechanism for controlling the opening and closing of the discharging rack is provided on the bin, and a material transport cavity is provided in the material taking frame, and a material taking plate which can slide up and down is provided in the material transport cavity, and a first connecting plate is provided above the material taking plate, and a lifting control mechanism is provided on the inner side of the material taking plate, and the lifting control mechanism can drive the material taking plate and the first connecting plate to rise and fall synchronously, and the lifting control mechanism is provided with a first telescopic rod, and the first telescopic rod can drive the material taking plate to move horizontally, and a pushing plate is provided on the side of the material taking plate facing away from the material bin, and a pushing and pulling mechanism is provided between the top of the pushing plate and the first connecting plate, and the pushing and pulling mechanism can drive the pushing plate to flip outward and move towards one side of the material bin, so as to push the concrete accumulated on the material taking plate to the outside or into the material bin for collection.

[0006] Preferably, a universal wheel is provided on the side of the machine body away from the trowel plate.

[0007] Preferably, the moving mechanism includes a second rack slidably arranged on the guide rail, the second connecting plate is fixedly arranged on the second rack, a second gear is meshed with the top of the second rack, a third motor is fixed in the guide frame, and the output shaft of the third motor is fixedly connected to the second gear.

[0008] Preferably, the wiper plate is rotatably arranged on one side of the first connecting plate, and a second motor is fixedly installed on the other side of the first connecting plate, and an output shaft of the second motor passes through the first connecting plate and is fixedly connected to the wiper plate.

[0009] Preferably, the valve mechanism includes a telescopic rod mounting frame fixedly connected to the side of the silo, a second telescopic rod is fixedly provided on the telescopic rod mounting frame, the telescopic end of the second telescopic rod is directed toward the connection between the discharging rack and the silo, an opening and closing plate is fixed to the telescopic end of the second telescopic rod, the opening and closing plate is located between the discharging rack and the silo, and the opening and closing between the discharging rack and the silo is controlled by controlling the movement of the opening and closing plate.

[0010] Preferably, the lifting control mechanism includes a screw rod vertically and rotatably arranged in the material transport cavity, a pulley is fixed on the top of the screw rod, and the pulleys are connected by belts. A fourth motor is fixed on the top of the material reclaiming frame, and the fourth motor can drive one of the pulleys to rotate. The second lifting platform and the first lifting platform are respectively threaded on the upper and lower sides of the screw rod, and the second lifting platform and the first lifting platform can slide up and down in the material reclaiming frame. The first connecting plate is fixedly connected to the second lifting platform, and the first telescopic rod is fixedly set on the first lifting platform.

[0011] Preferably, the push-pull mechanism includes a first motor fixedly provided on the top of the first connecting plate, a first gear fixed on the output shaft of the first motor, a first rack slidably provided on the bottom of the first connecting plate, the moving direction of the first rack is consistent with the distribution direction of the material bin and the material transport chamber, a guide rod is fixedly provided on one side of the first rack, a first connecting rod is hingedly provided at one end of the guide rod away from the first rack, a lifting rod is fixed on the top of the pushing plate, a second connecting rod is slidably sleeved on the top of the lifting rod, and the top end of the second connecting rod is hinged to the first connecting rod.

[0012] Preferably, a return spring is disposed inside the second connecting rod and abuts against the top of the lifting rod, and the return spring can realize adaptive extension and retraction of the lifting rod.

[0013] Preferably, a cylindrical pin hole is fixed at the bottom of the side wall of the material transport cavity close to the push plate, and a cylindrical pin is fixed at the inner bottom of the push plate. During the descending process of the push plate, the cylindrical pin can be inserted into the cylindrical pin hole.

[0014] Preferably, a guide plate is fixed in the material transport cavity and below the connecting plate, and the opening of the guide plate faces downward. A square pin is fixed on the top of the push plate and directly opposite to the bottom of the guide plate. After the push plate rises, the square pin can be inserted into the guide plate, thereby limiting the push plate to move only toward the direction of the silo.

[0015] Preferably, telescopic plates are slidably provided on both sides of the horizontal portion of the bottom of the feeding plate, and a first spring is fixedly connected between the inward end of the telescopic plate and the feeding plate.

[0016] In summary, the present invention has the following beneficial effects:

[0017] 1. The present invention utilizes a lifting and retracting rod to drive the material taking plate to take materials. When there is too much material in the corner, the excess material in the corner can be quickly and effectively collected while smoothing. When there is too little material in the corner, the material can be discharged through the silo while smoothing to replenish concrete. If there is previously shoveled concrete temporarily stored on the material taking plate, the temporarily stored concrete will be pushed out first for filling, ensuring the shoveling effect of the material taking plate on the concrete, and effectively preventing the temporarily stored concrete from drying. While improving the convenience of handling concrete in the corner, it effectively reduces the waste of concrete, solves the problem that the existing equipment cannot effectively handle too much or too little material in the corner, reduces manpower and time costs, and improves the efficiency of concrete smoothing.

[0018] 2. The feeding plate has a built-in spring to ensure that it can be pushed out smoothly even when the wall surface is uneven, avoiding jamming.

[0019] 3. Through ingenious structural design, while controlling the movement of the push plate through the push-pull mechanism, the push plate can be driven to perform flipping and translational movements according to needs, thereby achieving the desired effect while simplifying the structure, reducing costs and difficulty of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention;

[0022] Figure 2 is a schematic top view of an embodiment of the present invention;

[0023] Figure 3is a schematic internal stereoscopic diagram of a reclaimer frame in an embodiment of the present invention;

[0024] Figure 4 In the embodiment of the present invention Figure 3 An internal cross-sectional view of

[0025] Figure 5 In the embodiment of the present invention Figure 3 Side view of

[0026] Figure 6 In the embodiment of the present invention Figure 3 A top view of

[0027] Figure 7 Schematic diagram of the internal structure of the reclaiming plate in an embodiment of the present invention;

[0028] Figure 8 is a schematic diagram of the internal structure of the second connecting rod and the telescopic rod in an embodiment of the present invention;

[0029] Fig. 9 Embodiment of the present invention Figure 6 Enlarged schematic diagram at point A in the middle.

[0030] In the figure: 11, first lifting platform; 12, first telescopic rod; 13, material taking plate; 14, first motor; 15, first connecting plate; 16, first gear; 17, first rack; 18, guide rod; 19, first connecting rod; 20, second connecting rod; 21, telescopic rod; 22, material pushing plate; 23, guide plate; 24, return spring; 26, telescopic plate; 27, first spring; 28, fuselage; 29, second motor; 30, second connecting plate; 31, material wiping plate; 32, second rack; 33, guide rail ; 34. Reclaiming rack; 35. Second spring; 36. Vibrating motor; 37. Third motor; 38. Second gear; 39. Bottom plate; 40. Smoothing plate; 41. Universal wheel; 51. Discharging rack; 52. Opening and closing plate; 53. Second telescopic rod; 54. Telescopic rod mounting bracket; 55. Bin; 56. Fourth motor; 57. Screw; 58. Pulley; 59. Belt; 70. Material transport cavity; 71. Guide frame; 72. Second lifting platform; 73. Cylindrical pin hole; 74. Cylindrical pin; 75. Square pin. DETAILED DESCRIPTION

[0031] Combined with Figure 1-Figure 9The concrete trowel machine comprises a fuselage 28, a bottom end of the fuselage 28 is fixedly connected to a bottom plate 39, a bottom of the bottom plate 39 is connected to a trowel plate 40 through a second spring 35, a guide frame 71 is fixed to the top of the trowel plate 40, the bottom plate 39 is slidably arranged in the guide frame 71, a vibration motor 36 is fixedly arranged on the bottom plate 39, a guide rail 33 is fixedly arranged on one side of the top of the trowel plate 40, a second connecting plate 30 is slidably arranged on the upper side of the guide rail 33, a rotatably connected trowel plate 31 is arranged on the side of the second connecting plate 30, a moving mechanism is arranged on the trowel plate 40, the moving mechanism can drive the second connecting plate 30 and the trowel plate 31 to move back and forth, and a material taking machine frame 34 is fixedly arranged on both sides of the trowel plate 40;

[0032] A material bin 55 is fixedly provided on the side of the reclaiming frame 34 facing the bottom plate 39, a discharging frame 51 is fixedly provided at the bottom of the material bin 55, a valve mechanism for controlling the opening and closing of the discharging frame 51 is provided on the material bin 55, a material transport cavity 70 is provided in the reclaiming frame 34, a reclaiming plate 13 that can slide up and down is provided in the material transport cavity 70, a first connecting plate 15 is provided above the reclaiming plate 13, a lifting control mechanism is provided on the inner side of the reclaiming plate 13, and the lifting control mechanism can drive the reclaiming plate 13 and the first connecting plate 15 5 is lifted synchronously, the lifting control mechanism is provided with a first telescopic rod 12, the first telescopic rod 12 can drive the picking plate 13 to move horizontally, the picking plate 13 is provided with a push plate 22 on the side facing away from the silo 55, a push-pull mechanism is provided between the top of the push plate 22 and the first connecting plate 15, the push-pull mechanism can drive the push plate 22 to turn outward and move toward the side close to the silo 55, and then the concrete accumulated on the picking plate 13 can be pushed out to the outside or pushed into the silo 55 for collection.

[0033] Advantageously, a universal wheel 41 is provided on the side of the machine body 28 away from the trowel plate 40 .

[0034] Advantageously, the moving mechanism includes a second rack 32 slidably disposed on the guide rail 33, the second connecting plate 30 is fixedly disposed on the second rack 32, a second gear 38 is meshed with the top of the second rack 32, a third motor 37 is fixed in the guide frame 71, and the output shaft of the third motor 37 is fixedly connected to the second gear 38.

[0035] Advantageously, the wiper plate 31 is rotatably arranged on one side of the second connecting plate 30 , and a second motor 29 is fixedly mounted on the other side of the second connecting plate 30 . The output shaft of the second motor 29 passes through the second connecting plate 30 and is fixedly connected to the wiper plate 31 .

[0036] Advantageously, the valve mechanism includes a telescopic rod mounting frame 54 fixedly connected to the side of the silo 55, a second telescopic rod 53 is fixedly provided on the telescopic rod mounting frame 54, the telescopic end of the second telescopic rod 53 is directed toward the connection between the discharge rack 51 and the silo 55, an opening and closing plate 52 is fixed to the telescopic end of the second telescopic rod 53, the opening and closing plate 52 is located between the discharge rack 51 and the silo 55, and the opening and closing between the discharge rack 51 and the silo 55 is controlled by controlling the movement of the opening and closing plate 52.

[0037] Advantageously, the lifting control mechanism includes a screw rod 57 vertically and rotatably arranged in the material transport chamber 70, and a pulley 58 is fixed to the top of the screw rod 57, and the pulleys 58 are connected by a belt 59. A fourth motor 56 is fixed to the top of the material reclaiming frame 34, and the fourth motor 56 can drive one of the pulleys 58 to rotate. The second lifting platform 72 and the first lifting platform 11 are respectively threadedly sleeved on the upper and lower sides of the screw rod 57, and the second lifting platform 72 and the first lifting platform 11 can slide up and down in the material reclaiming frame 34. The first connecting plate 15 is fixedly connected to the second lifting platform 72, and the first telescopic rod 12 is fixedly set on the first lifting platform 11.

[0038] Advantageously, the push-pull mechanism includes a first motor 14 fixedly provided on the top of the first connecting plate 15, a first gear 16 fixed on the output shaft of the first motor 14, a first rack 17 slidably provided on the bottom of the first connecting plate 15, the moving direction of the first rack 17 is consistent with the distribution direction of the silo 55 and the material transport chamber 70, a guide rod 18 is fixedly provided on one side of the first rack 17, a first connecting rod 19 is hingedly connected to one end of the guide rod 18 away from the first rack 17, a telescopic rod 21 is fixedly provided on the top of the push plate 22, a second connecting rod 20 is slidably sleeved on the top of the telescopic rod 21, and the top of the second connecting rod 20 is hinged to the first connecting rod 19.

[0039] Advantageously, a return spring 24 is disposed inside the second connecting rod 20 and abuts against the top of the telescopic rod 21 . The return spring 24 can realize adaptive telescopic movement of the telescopic rod 21 .

[0040] Advantageously, a cylindrical pin hole 73 is fixed to the bottom of the side wall of the material transport cavity 70 near the push plate 22, and a cylindrical pin 74 is fixed to the inner bottom of the push plate 22. During the descent of the push plate 22, the cylindrical pin 74 can be inserted into the cylindrical pin hole 73.

[0041] Beneficially, a guide plate 23 is fixed in the material transport cavity 70 and below the first connecting plate 15, and the guide plate 23 opens downward. A square pin 75 is fixed on the top of the push plate 22 and directly below the guide plate 23. After the push plate 22 rises, the square pin 75 can be inserted into the guide plate 23, thereby limiting the push plate 22 to move only in the direction of the silo 55.

[0042] Advantageously, telescopic plates 26 are slidably provided on both sides of the horizontal bottom portion of the material-collecting plate 13 , and a first spring 27 is fixedly connected between the inner end of the telescopic plate 26 and the material-collecting plate 13 .

[0043] Method of use of the present invention:

[0044] In the initial state: the trowel plate 40 and the universal wheel 41 are in contact with the ground, the feeding plate 13 is located inside the feeding frame 34 and the bottom is in contact with the ground, the pushing plate 22 is located at the lowermost position, the return spring 24 inside the second connecting rod 20 is in a free state, the cylindrical pin 74 is inserted into the cylindrical pin hole 73, and the opening and closing plate 52 is located inside the silo 55 and is in a closed state.

[0045] When the concrete on the ground is found to be uneven, the second motor 29 is started to rotate the trowel plate 31 so that the longer end of the trowel plate 31 faces downward and contacts the ground, and the third motor 37 is started to drive the second gear 38 to rotate, so that the second rack 32 makes a reciprocating linear motion along the guide rail 33, so that the second connecting plates 30 at both ends of the second rack 32 drive the trowel plate 31 to make a reciprocating motion, and the obviously uneven concrete is smoothed, achieving a concrete smoothing pretreatment process, and then the machine body 28 is pulled to move to the side of the universal wheel 41 by holding the machine body 28, and the vibration motor 36 is started at the same time, and the vibration motor 36 drives the trowel plate 40 to vibrate through the second spring 35, and then the pre-smoothed concrete is further smoothed by the trowel plate 40.

[0046] When the concrete in the corner is found to be uneven, the trowel plate 40 is moved close to the corner. If there is too much concrete, the first telescopic rod 12 is controlled to extend, thereby driving the material taking plate 13 to extend from the material transport cavity 70, and then the excess concrete in the corner is shoveled out through the material taking plate 13. If the concrete is insufficient, the second telescopic rod 53 is controlled to shorten and drive the opening and closing plate 52 to open, and the concrete stored in the silo 55 flows out through the discharging rack 51. When the required amount of concrete flows out, the opening and closing plate 52 is controlled to close, and the concrete is smoothed by the trowel plate 40. If there is too much concrete, the excess concrete will be shoveled out through the feeding plate 13 mechanism according to the above process; when encountering an uneven wall surface, the telescopic plate 26 compresses the first spring 27 and retracts into the feeding plate 13 to avoid collision with the wall and causing jamming. At the same time, the concrete shoveled out by the telescopic plate 26 during the movement will flow to the concave part of the wall surface. If there is excess concrete, it will be retained on the feeding plate 13. Then the first telescopic rod 12 is controlled to shorten and the feeding plate 13 is retracted into the material transport cavity 70, so that the material can be temporarily stored on the upper side of the feeding plate 13.

[0047] If there is insufficient concrete in the subsequent concrete leveling process, the first motor 14 is controlled to start first, thereby driving the first gear 16 to rotate. The first gear 16 drives the first rack 17 to move to the side away from the push plate 22 through meshing, and then pulls the second connecting rod 20 through the first connecting rod 19. Due to the cooperation of the cylindrical pin hole 73 and the cylindrical pin 74, the push plate 22 is turned outward under the traction of the first connecting rod 19. During the turning process of the push plate 22, the bottom of the push plate 22 will abut against the side of the feeding plate 13, so the telescopic rod 21 will adaptively retract a part of the second connecting rod 20 and compress the return spring 24. At this time, the push plate 22 will adaptively rise to the bottom and abut against the upper surface of the feeding plate 13, thereby pushing out the concrete temporarily stored on the feeding plate 13. In the case of insufficient concrete, the opening and closing plate 52 is controlled to open to discharge the concrete in the silo 55 for replenishment.

[0048] If there is too much concrete temporarily stored on the feeding plate 13 or the leveling work is finished, the fourth motor 56 is controlled to start and drive the side pulley 58 to rotate, and the side pulley 58 drives the other pulleys 58 to rotate synchronously through the belt 59, and then drives the screw 57 to rotate synchronously, and then controls the second lifting platform 72 and the first lifting platform 11 to rise synchronously, the first lifting platform 11 drives the feeding plate 13 to rise through the first telescopic rod 12, and the second lifting platform 72 drives the first connecting plate 15 to rise, and then drives the push plate 22 to rise synchronously until the bottom of the feeding plate 13 The upper surface of the horizontal part is flush with the opening of the silo 55. During this process, the cylindrical pin 74 is pulled out of the cylindrical pin hole 73, and the square pin 75 is inserted into the guide plate 23. At this time, when the first motor 14 is started and drives the first rack 17 to move away from the push plate 22, due to the sliding restriction of the guide plate 23, the guide rod 18 can only drive the push plate 22 to move closer to the silo 55 through the first connecting rod 19, the second connecting rod 20 and the telescopic rod 21, and then the concrete temporarily stored on the material plate 13 is pushed into the silo 55 through the push plate 22 for collection.

[0049] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A concrete trowel, comprising a body (28), characterized in that: The bottom end of the machine body (28) is fixedly connected with a bottom plate (39), the bottom of the bottom plate (39) is connected with a trowel plate (40) through a second spring (35), the top of the trowel plate (40) is fixed with a guide frame (71), the bottom plate (39) is slidably arranged in the guide frame (71) up and down, a vibration motor (36) is fixedly arranged on the bottom plate (39), a guide rail (33) is fixedly arranged on one side of the top of the trowel plate (40), a second connecting plate (30) is slidably arranged on the upper side of the guide rail (33), a rotatably connected trowel plate (31) is arranged on the side of the second connecting plate (30), a moving mechanism is arranged on the trowel plate (40), the moving mechanism can drive the second connecting plate (30) and the trowel plate (31) to move back and forth, and a material taking machine frame (34) is fixedly arranged on both sides of the trowel plate (40); A material bin (55) is fixedly provided on one side of the material reclaiming frame (34) facing the bottom plate (39), a material discharging frame (51) is fixed at the bottom of the material bin (55), a valve mechanism for controlling the opening and closing of the material discharging frame (51) is provided on the material bin (55), a material transport cavity (70) is provided in the material reclaiming frame (34), a material reclaiming plate (13) capable of sliding up and down is provided in the material transport cavity (70), a first connecting plate (15) is provided above the material reclaiming plate (13), a lifting control mechanism is provided on the inner side of the material reclaiming plate (13), the lifting control mechanism can drive the material reclaiming plate (13) and the first connecting plate (15) to rise and fall synchronously, and the lifting control mechanism can drive the material reclaiming plate (13) and the first connecting plate (15) to rise and fall synchronously. A first telescopic rod (12) is provided on the control mechanism, and the first telescopic rod (12) can drive the feeding plate (13) to move horizontally. A pushing plate (22) is provided on the side of the feeding plate (13) facing away from the silo (55). A push-pull mechanism is provided between the top of the pushing plate (22) and the first connecting plate (15), and the pushing-pull mechanism can drive the pushing plate (22) to turn outward and move toward the side close to the silo (55), thereby pushing the concrete accumulated on the feeding plate (13) to the outside or into the silo (55) for collection. A universal wheel (41) is provided on the side of the machine body (28) away from the trowel plate (40).

2. A concrete trowel according to claim 1, characterized in that: The moving mechanism comprises a second rack (32) slidably arranged on the guide rail (33), the second connecting plate (30) is fixedly arranged on the second rack (32), a second gear (38) is meshed with the top of the second rack (32), a third motor (37) is fixed in the guide frame (71), and an output shaft of the third motor (37) is fixedly connected to the second gear (38).

3. A concrete trowel according to claim 1, characterized in that: The wiper plate (31) is rotatably arranged on one side of the second connecting plate (30), and a second motor (29) is fixedly installed on the other side of the second connecting plate (30). The output shaft of the second motor (29) passes through the second connecting plate (30) and is fixedly connected to the wiper plate (31).

4. A concrete trowel according to claim 1, characterized in that: The valve mechanism comprises a telescopic rod mounting frame (54) fixedly connected to the side of the silo (55); a second telescopic rod (53) is fixedly provided on the telescopic rod mounting frame (54); a telescopic end of the second telescopic rod (53) faces the connection between the discharge rack (51) and the silo (55); an opening and closing plate (52) is fixed to the telescopic end of the second telescopic rod (53); the opening and closing plate (52) is located between the discharge rack (51) and the silo (55); and the opening and closing between the discharge rack (51) and the silo (55) is controlled by controlling the movement of the opening and closing plate (52).

5. A concrete trowel according to claim 1, characterized in that: The lifting control mechanism comprises a screw rod (57) vertically and rotatably arranged in the material transport cavity (70), a pulley (58) is fixed on the top of the screw rod (57), and the pulleys (58) are connected by a belt (59), a fourth motor (56) is fixed on the top of the material reclaiming frame (34), and the fourth motor (56) can drive one of the pulleys (58) to rotate, and a second lifting platform (72) and a first lifting platform (11) are respectively threadedly sleeved on the upper and lower sides of the screw rod (57), and the second lifting platform (72) and the first lifting platform (11) can slide up and down in the material reclaiming frame (34), the first connecting plate (15) is fixedly connected to the second lifting platform (72), and the first telescopic rod (12) is fixedly arranged on the first lifting platform (11).

6. A concrete trowel according to claim 1, characterized in that: The push-pull mechanism comprises a first motor (14) fixedly provided on the top of the first connecting plate (15), a first gear (16) fixed on the output shaft of the first motor (14), a first rack (17) slidably provided on the bottom of the first connecting plate (15), the moving direction of the first rack (17) is consistent with the distribution direction of the material bin (55) and the material transport chamber (70), a guide rod (18) is fixedly provided on one side of the first rack (17), a first connecting rod (19) is hingedly connected to one end of the guide rod (18) away from the first rack (17), a lifting rod (21) is fixedly provided on the top of the pushing plate (22), a second connecting rod (20) is slidably sleeved on the top of the lifting rod (21), and the top of the second connecting rod (20) is hingedly connected to the first connecting rod (19).

7. A concrete trowel according to claim 6, characterized in that: A return spring (24) is provided inside the second connecting rod (20) and abuts against the top of the lifting rod (21).

8. A concrete trowel according to claim 6, characterized in that: A cylindrical pin hole (73) is fixed at the bottom of the side wall of the material transport cavity (70) close to the material pusher plate (22), and a cylindrical pin (74) is fixed at the bottom of the inner side of the material pusher plate (22).

9. A concrete trowel according to claim 6, characterized in that: A guide plate (23) is fixed in the material transport cavity (70) and below the first connecting plate (15), the guide plate (23) opening faces downward, and a square pin (75) is fixed on the top of the push plate (22) and directly below the guide plate (23).

10. A concrete trowel according to claim 1, characterized in that: Telescopic plates (26) are slidably provided on both sides of the horizontal part at the bottom of the material taking plate (13), and a first spring (27) is fixedly connected between the inner end of the telescopic plate (26) and the material taking plate (13).

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