A trowel mounting mechanism and a new troweling machine having the same

Abstract

The utility model discloses a kind of trowel mounting mechanism and novel troweling machine with the trowel mounting mechanism, wherein, a kind of trowel mounting mechanism, including suspension star plate, multiple vertical connecting components and trowel connecting shaft, suspension star plate includes the base plate with middle through-hole, at least two horizontal hangers, main shaft sleeve and at least two connecting plates of the through-hole hole wall connected with main shaft sleeve outer wall, the lower of each horizontal hanger is fixedly arranged with a vertical connecting component, each vertical connecting component includes at least two vertical connecting pieces, vertical connecting piece adopts straight bar ball head joint bearing.The utility model of a kind of trowel mounting mechanism adopts the structure of suspension star plate, vertical connecting piece is located just above trowel, position is higher and has the shelter of trowel, the amount of splashed cement is greatly reduced, adopts straight bar ball head joint bearing, with lubrication and oil seal, not prone to jam, completely solve the problem of difficult maintenance and scrap in the prior art that six square shaft of troweling machine is jammed and rusted.

Description

Technical Field

[0001] This utility model belongs to the field of floor construction technology, specifically relating to a trowel installation mechanism and a novel power trowel with the trowel installation mechanism. Background Technology

[0002] A power trowel is an industrial device that uses a rotating trowel to smooth, polish, finish, and grind cement floors. Currently, power trowels used on the market include... Figure 1 As shown, a cross disc is installed on the output shaft of the reducer, and four hexagonal shafts 7 are movably engaged with the cross disc. Specifically, the cross disc includes a disc body 1 at the bottom center, a main shaft sleeve 2 fixed on the disc body, and four connecting sleeves 3 integrally formed on the outer circumference of the main shaft sleeve. The four connecting sleeves are arranged in a cross shape. The inner end of the hexagonal shaft 7 is cylindrical and rotatably inserted into the corresponding connecting sleeve. An annular limiting groove 5 is provided on the inner end of the cylindrical shaft. A positioning bolt 4 is radially threaded on the connecting sleeve. The inner end of the positioning bolt 4 is inserted into the annular limiting groove and rotatably engaged with the annular limiting groove. The handle includes a columnar sleeve 6 sleeved on the hexagonal shaft and an L-shaped rod 9 horizontally on the connecting columnar sleeve. The free end of the L-shaped rod is vertically detachably fixed with an adjusting bolt 10. The end face of the columnar sleeve and the end face of the connecting sleeve have a rotational clearance. A squeegee is fixed at the bottom of the hexagonal shaft. When the adjusting bolt is pressed, the handle drives the L-shaped hexagonal shaft to rotate around its own axis, thereby driving the squeegee to adjust the angle.

[0003] The aforementioned cross-shaped bearing structure and its mating structure with the hexagonal shaft have significant shortcomings. First, the shaft hole of the cross-shaped bearing main sleeve is perpendicular to the shaft holes of the four connecting sleeves, making it impossible for the lathe to complete the machining in one go. Machining the shaft holes of the four connecting sleeves from four directions increases the machining difficulty and cost. Second, the hexagonal shaft's dynamic fit with the shaft holes of the connecting sleeves on the cross-shaped bearing means it is exposed to slurry during operation on cement floors. Slurry and moisture can easily enter the shaft holes, causing the hexagonal shaft to jam or rust in the shaft holes of the connecting sleeves. This prevents the power trowel from working properly, and once the hexagonal shaft is jammed and rusted, it is very difficult to pull it out of the shaft holes of the connecting sleeves, rendering the power trowel unusable.

[0004] Improving existing power trowels to address the aforementioned technical shortcomings is a pressing technical issue that needs to be addressed. Utility Model Content

[0005] This utility model provides a smear mounting mechanism to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A smear mounting mechanism includes a suspended star disk, a plurality of vertical connecting components fixed to the bottom of the suspended star disk, and a smear connecting shaft that is rotatably connected to the lower part of each vertical connecting component. The lower surface of the smear connecting shaft is used to fix and mount the smear. The suspended star disk includes a base plate with a through hole in the middle, at least two horizontal arms that are uniformly fixed to the base plate along the circumference and extend radially, a main bushing disposed at the center of the through hole, and at least two connecting plates that connect the outer wall of the main bushing and the wall of the through hole. Each of the horizontal arms is fixedly disposed below a vertical connecting component, and each vertical connecting component includes at least two vertical connecting parts.

[0008] Preferably, the vertical connector adopts a straight rod ball joint bearing, the top of the straight rod ball joint bearing is fixed to the corresponding horizontal boom by a locking bolt, and the lower end of the straight rod ball joint bearing is threaded onto the smear connecting shaft.

[0009] Preferably, the smear connecting shaft is a hexagonal shaft.

[0010] Preferably, a reinforcing plate is provided on the upper surface of the horizontal boom, and the locking bolts are inserted and fixed to the reinforcing plate from top to bottom.

[0011] Preferably, there are four horizontal booms fixed to the base plate, arranged in a cross shape, and the inner ends of the horizontal booms are detachably fixed to the base plate by connecting bolts.

[0012] Preferably, a downward pressure handle is fixedly connected to the side of the smear connecting shaft, the free end of the downward pressure handle is located below the through hole, and a vertical adjustment bolt is threaded onto the free end, with the top of the vertical adjustment bolt higher than the upper surface of the through hole.

[0013] Preferably, there are four connecting plates connecting the outer wall of the main sleeve and the wall of the through hole, arranged in a cross shape, and the free end of each of the downward pressing handles is located below the corresponding fan-shaped hole formed by the outer wall of the main sleeve, the wall of the through hole, and the connecting plate.

[0014] A novel power trowel includes a speed reducer, a trowel mounting mechanism, and a trowel. The output shaft of the speed reducer is inserted and fixed in the main shaft sleeve, and the trowel is fixed to the lower surface of the trowel connecting shaft.

[0015] Preferably, the device further includes a power source for driving the reducer, an umbrella-shaped protective net fixed to the reducer, a control handle fixed to the reducer, a wire rope lifting mechanism on the control handle, an upper pressure plate slidably sleeved on the output shaft of the reducer, a lower pressure plate slidably sleeved on the output shaft of the reducer, a thrust bearing located between the upper and lower pressure plates, and a pressure rod hinged to the reducer. The power source is fixed to the umbrella-shaped protective net at the upper end of the reducer. The inner end of the pressure rod is press-fitted with the upper surface of the upper pressure plate. The outer end of the pressure rod is connected to the wire rope lifting mechanism through a wire rope extending from the handle. The lower pressure plate is in sliding engagement with the output shaft of the reducer while simultaneously rotating in engagement.

[0016] Preferably, the power source is an electric motor or a gasoline engine.

[0017] The beneficial effects of this utility model's smear mounting mechanism are as follows:

[0018] 1. Utilizing a suspended star-plate structure, a vertical connecting component is fixed at the bottom of the suspended star-plate. Below this component, a trowel connecting shaft is mounted, allowing for tilting and rotation. The trowel is installed at the bottom of this shaft. The vertical connector is positioned directly above the trowel, providing a higher position and shielding against cement splatter. The vertical connector employs a straight-rod ball-end bearing, which is self-lubricated and oil-sealed, preventing jamming and ensuring the trowel connecting shaft rotates smoothly without jamming or rusting. This significantly extends its service life and increases maintenance intervals. Replacing the straight-rod ball-end bearing is simple; just loosen the lock nut. This completely solves the problem of existing power trowels where the hexagonal shaft jams, rusts, and is difficult to repair, leading to potential scrapping.

[0019] 2. A reinforcing plate is installed on the upper surface of the horizontal boom to increase the structural strength of the horizontal boom.

[0020] 3. A pressing handle is fixedly connected to the side of the smear connecting shaft. The free end of the pressing handle is located below the through hole, and a vertical adjusting bolt is screwed onto the threaded end of the free end. The top of the vertical adjusting bolt is higher than the upper end face of the through hole, which facilitates the pressing plate to press down the adjusting bolt. In turn, the pressing handle drives the smear connecting shaft to rotate, thereby adjusting the tilt angle of the smear.

[0021] 4. In use, the power source drives the reducer, and the output shaft of the reducer drives the trowel mounting mechanism and the trowel to rotate. The wire rope lifting mechanism lifts the pressure rod through the wire rope, and the pressure rod presses down on the upper pressure plate. The upper pressure plate moves downward and squeezes the lower pressure plate downward through the thrust bearing. The pressure plate presses down on the adjusting bolt, and then drives the trowel connecting shaft to rotate through the downward pressing handle, thereby adjusting the tilt angle of the trowel. Attached Figure Description

[0022] Figure 1 This is a top view of a smear mounting mechanism in the prior art.

[0023] Figure 2 This is a top view of the smear mounting mechanism of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the novel power trowel of this utility model;

[0025] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0026] Figure 5 for Figure 3 Enlarged structural diagram at point B;

[0027] Figure 6 A schematic diagram of the main structure of the downward pressing handle and the vertical adjusting bolt.

[0028] Figure 7 This is a schematic diagram of the left-side structure of the downward-pressing handle and the vertical adjusting bolt.

[0029] In the diagram: 1-Disc body; 2-Main shaft sleeve; 3-Connecting sleeve; 4-Positioning bolt; 5-Annular limiting groove; 6-Columnar sleeve; 7-Hexagonal shaft; 8-Pulling plate; 9-L-shaped rod; 10-Vertical adjusting bolt; 11-Base plate; 12-Connecting plate; 13-Fan-shaped hole; 14-Horizontal boom; 15-Lowering handle; 16-Control handle; 17-Wire rope lifting mechanism; 18-Power source; 19-Reducer; 20-Umbrella-shaped protective net; 21-Pressure rod; 22-Output shaft; 23-Lower pressure plate; 24-Upper pressure plate; 25-Thrust bearing; 26-Reinforcing plate; 27-Locking bolt; 28-Straight rod ball joint bearing; 29-Pulling plate connecting shaft. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that the following detailed description is illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] Example 1

[0032] A smear mounting mechanism, such as Figure 2-6As shown, the system includes a suspended star disk, multiple vertical connecting components fixed to the bottom of the suspended star disk, and a smear connecting shaft 29 fixed below each of the multiple vertical connecting components. The smear connecting shaft 29 can be a square shaft, a hexagonal shaft, or a trapezoidal shaft, etc. In this embodiment, the smear connecting shaft is a hexagonal shaft. The lower surface of the smear connecting shaft is used to fix and install smears 8. The suspended star disk includes a base plate 11 with a through hole in the middle, four horizontal arms 14 that are uniformly fixed on the base plate circumferentially and extend radially, a main shaft sleeve 2 located at the center of the through hole, and four connecting plates 12 that connect the outer wall of the main shaft sleeve and the wall of the through hole. The base plate can be circular, square, or a four-cornered star with concave arc sides, etc. In this embodiment, a four-cornered star with concave arc sides is used. The four horizontal arms are arranged in a cross shape, and the inner ends of the horizontal arms are detachably fixed to the base plate by connecting bolts. Each horizontal boom is fixedly mounted with a corresponding vertical connecting assembly below it. Each vertical connecting assembly includes two vertical connectors. In this embodiment, the vertical connectors are straight rod ball joint bearings 28. The top of the straight rod ball joint bearing is fixed to the corresponding horizontal boom 14 by locking bolts 27, and the lower end of the straight rod ball joint bearing is threaded onto the squeegee connecting shaft 29. To increase the structural strength of the horizontal boom, a reinforcing plate 26 is provided on the upper surface of the horizontal boom. Locking bolts are inserted from top to bottom and fixed to the reinforcing plate, fixing the reinforcing plate 26, the horizontal boom, and the straight rod ball joint bearing 28 together.

[0033] The side of the smear connecting shaft 29 is fixedly connected to the pressing handle 15. The free end of the pressing handle is located below the through hole, and a vertical adjusting bolt 10 is threaded onto the free end. The top of the vertical adjusting bolt is higher than the upper end face of the through hole, which facilitates the pressing plate pressing down on the adjusting bolt. In turn, the pressing handle drives the smear connecting shaft to rotate, thereby adjusting the tilt angle of the smear. Specifically, four connecting plates are integrally connected to the outer wall of the main shaft sleeve and the wall of the through hole, arranged in a cross shape, and can be cut into shape in one go. The free ends of each pressing handle are located below the corresponding fan-shaped hole 13 formed by the outer wall of the main shaft sleeve, the wall of the through hole, and the connecting plates.

[0034] The trowel mounting mechanism in this embodiment adopts a suspended star disk structure. A vertical connecting component is fixed at the bottom of the suspended star disk, and a trowel connecting shaft is mounted below the vertical connecting component, allowing for tilting and rotation. The trowel is installed at the bottom of the trowel connecting shaft. The vertical connector is located directly above the trowel, at a higher position and shielded by the trowel, significantly reducing the amount of cement splattered. The vertical connector uses a straight-rod ball joint bearing, which is self-lubricated and oil-sealed, making it less prone to jamming. This ensures that the trowel connecting shaft rotates smoothly without jamming or rusting, greatly extending its service life and increasing the intervals between maintenance. Replacing the straight-rod ball joint bearing is simple; just loosen the lock nut. This completely solves the problem of existing power trowels' hexagonal shafts jamming and rusting, leading to difficult repairs and eventual scrapping.

[0035] In other embodiments, unlike the embodiments described above, the horizontal booms 14, which are uniformly fixed to the substrate circumferentially and extend radially, can be two, three, five, etc., and the connecting plates connecting the outer wall of the main shaft sleeve and the wall of the through hole can also be two, three, five, etc. The vertical connecting assembly can also include three vertical connecting parts; each vertical connecting part is a pin with its bottom engaged with a hexagonal shaft for pitch engagement, for example, the hexagonal shaft is provided with a hanging ring or a hanging nose, and the bottom of the pin is hinged to the hanging ring or hanging nose for pitch engagement.

[0036] Example 2

[0037] A new type of power trowel, such as Figure 2-6 As shown, the assembly includes a speed reducer 19, a power source 18 driving the speed reducer, an umbrella-shaped protective net 20 fixed to the speed reducer, a control handle 16 fixed to the speed reducer, a wire rope lifting mechanism 17 on the control handle, an upper pressure plate 24 slidably sleeved on the output shaft of the speed reducer, a lower pressure plate 23 slidably sleeved on the output shaft of the speed reducer, a thrust bearing 25 located between the upper and lower pressure plates, and a pressure rod 21 hinged to the speed reducer via an ear plate 30. The power source is fixed to the umbrella-shaped protective net at the upper end of the speed reducer. The inner end of the pressure rod presses against the upper surface of the upper pressure plate, and the outer end of the pressure rod is connected to the wire rope lifting mechanism via a wire rope extending from the handle. The lower pressure plate slides and rotates with the output shaft of the speed reducer. All of the above components are existing technology and will not be described in detail here. The new type of power trowel also includes the trowel mounting mechanism and trowel 8 as in Embodiment 1. The output shaft 22 of the speed reducer is inserted and fixed in the main shaft sleeve 2, and the trowel is fixed on the lower surface of the trowel connecting shaft 29. The power source is either an electric motor or a gasoline engine; in this embodiment, a gasoline engine is used.

[0038] In this embodiment of the novel power trowel, during use, the power source drives the reducer, and the output shaft of the reducer drives the trowel mounting mechanism and the trowel to rotate. The wire rope lifting mechanism lifts the pressure rod through the wire rope, and the pressure rod presses down on the upper pressure plate. The upper pressure plate moves downward and squeezes the lower pressure plate downward through the thrust bearing. The pressure plate presses down on the adjusting bolt, and then drives the trowel connecting shaft to rotate through the downward pressing handle, thereby adjusting the tilt angle of the trowel.

Claims

1. A smear mounting mechanism, characterized in that: The system includes a suspended star disk, multiple vertical connecting components fixed to the bottom of the suspended star disk, and a smear connecting shaft that is rotatably connected to each vertical connecting component. The lower surface of the smear connecting shaft is used to fix and install smears. The suspended star disk includes a base plate with a through hole in the middle, at least two horizontal arms that are uniformly fixed to the base plate circumferentially and extend radially, a main shaft sleeve located at the center of the through hole, and at least two connecting plates that connect the outer wall of the main shaft sleeve and the wall of the through hole. Each horizontal arm is fixedly disposed below a vertical connecting component, and each vertical connecting component includes at least two vertical connecting parts.

2. The smear mounting mechanism according to claim 1, characterized in that: The vertical connector uses a straight rod ball joint bearing. The top of the straight rod ball joint bearing is fixed to the corresponding horizontal boom by a locking bolt, and the lower end of the straight rod ball joint bearing is threaded onto the smear connecting shaft.

3. The smear mounting mechanism according to claim 2, characterized in that: The smear connecting shaft is a hexagonal shaft.

4. The smear mounting mechanism according to claim 3, characterized in that: A reinforcing plate is provided on the upper surface of the horizontal boom, and the locking bolts are inserted and fixed to the reinforcing plate from top to bottom.

5. The smear mounting mechanism according to claim 4, characterized in that: There are four horizontal booms fixed to the base plate, arranged in a cross shape. The inner ends of the horizontal booms are detachably fixed to the base plate by connecting bolts.

6. A smear mounting mechanism according to any one of claims 1-5, characterized in that: The side of the smear connecting shaft is fixedly connected to a downward pressing handle. The free end of the downward pressing handle is located below the through hole, and a vertical adjusting bolt is threaded onto the free end. The top of the vertical adjusting bolt is higher than the upper surface of the through hole.

7. The smear mounting mechanism according to claim 6, characterized in that: There are four connecting plates connecting the outer wall of the main sleeve and the wall of the through hole, arranged in a cross shape. The free end of each of the downward pressing handles is located below the corresponding fan-shaped hole formed by the outer wall of the main sleeve, the wall of the through hole, and the connecting plate.

8. A novel power trowel, characterized in that: It includes a speed reducer, a smear mounting mechanism as described in claim 7, and a smear, wherein the output shaft of the speed reducer is inserted and fixed in the main shaft sleeve, and the smear is fixed to the lower surface of the smear connecting shaft.

9. A novel power trowel according to claim 8, characterized in that: It also includes a power source for driving the reducer, an umbrella-shaped protective net fixed to the reducer, a control handle fixed to the reducer, a wire rope lifting mechanism on the control handle, an upper pressure plate slidably sleeved on the output shaft of the reducer, a lower pressure plate slidably sleeved on the output shaft of the reducer, a thrust bearing located between the upper and lower pressure plates, and a pressure rod hinged to the reducer. The power source is fixed to the umbrella-shaped protective net at the upper end of the reducer. The inner end of the pressure rod is pressed against the upper surface of the upper pressure plate. The outer end of the pressure rod is connected to the wire rope lifting mechanism through a wire rope extending from the handle. The lower pressure plate is slidably engaged with the output shaft of the reducer while rotating.

10. A novel power trowel according to claim 9, characterized in that: The power source is an electric motor or a gasoline engine.

Images