Trowel handle adjusting and fixing mechanism and trowel

Abstract

This utility model discloses a handle adjustment and fixing mechanism for a power trowel and a power trowel itself. The handle adjustment and fixing mechanism includes a handle that is rotatably mounted at the bottom of a lever via a first rotating structure, a ratchet plate that is rotatably mounted at the bottom of the lever via a second rotating structure, a tension spring fixing plate fixed to the bottom of the lever, and a tension spring connecting the tension spring fixing plate and the bottom of the ratchet plate. The second rotating structure is located behind the first rotating structure, and the tension spring fixing plate is located in front of the first rotating structure. The ratchet plate is an arc-shaped plate with multiple slots evenly distributed from top to bottom along its leading edge. The handle has a positioning baffle that engages with the slots for positioning and fixing. This utility model's handle adjustment and fixing mechanism for a power trowel makes handle adjustment time-saving and convenient, solving the problem of the time-consuming and inconvenient process of loosening and tightening locking bolts and nuts to adjust the height. Furthermore, the components of the handle adjustment and fixing mechanism are simple to manufacture and have a long service life.

Description

Technical Field

[0001] This utility model belongs to the field of floor construction technology, specifically relating to the adjustment and fixing mechanism of the handle of a power trowel and the power trowel itself. 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, the device includes a speed reducer 1, a power source 2 driving the speed reducer, an umbrella-shaped protective net 3 fixed to the speed reducer, a handle 4 fixed to the speed reducer, a wire rope lifting mechanism 5 on the handle 5, a diaphragm mounting mechanism 6, and a squeegee 7. A handle 8 is detachably fixed to the lower surface of the rear end of the handle. The handle can be tilted to adjust its height to accommodate operators of different heights. Specifically, a middle sleeve with tapered holes at both ends is horizontally fixed to the bottom of the handle. Two symmetrical outer sleeves that taper into the middle sleeve are horizontally fixed to the lower end of the handle. The middle sleeve and outer sleeves are then locked and fixed by locking bolts and nuts. Taper friction and nut friction prevent the handle from sliding up and down. When adjusting the height of the handle, the locking nut must be loosened, adjusted, and then tightened again.

[0003] Its disadvantages are: First, the machining of the intermediate sleeve with tapered holes and the outer sleeve with tapered shaft involves many processes and high production costs. Second, adjusting the height of the handle is complicated and time-consuming. Third, during the troweling process, the worker needs to move the troweling machine back and forth, which puts a lot of stress on the handle, making the nuts easy to loosen, and the locking bolts and nuts are easily damaged due to the high stress.

[0004] Improving the adjustment and fixing mechanism of the existing power trowel handle to address the aforementioned technical deficiencies is a pressing technical problem that needs to be solved. Utility Model Content

[0005] This utility model provides a handle adjustment and fixing mechanism for a power trowel and a power trowel to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A trowel handle adjustment and fixing mechanism includes a handle that is rotatably mounted at the bottom of a lever via a first rotating structure, a ratchet plate that is rotatably mounted at the bottom of the lever via a second rotating structure, a tension spring fixing plate fixed to the bottom of the lever, and a tension spring connecting the tension spring fixing plate and the bottom of the ratchet plate. The second rotating structure is located behind the first rotating structure, and the tension spring fixing plate is located in front of the first rotating structure. The ratchet plate is an arc-shaped plate with multiple slots evenly distributed from top to bottom on its leading edge. The handle has a positioning baffle that is positioned and fixedly engaged with the slots.

[0007] Preferably, the bottom of the ratchet plate is provided with a pull ring for pitch and rotation.

[0008] Preferably, both the first rotating structure and the second rotating structure include a hinge shaft and a hinge plate fixed to the lower surface of the handlebar.

[0009] A power trowel includes a speed reducer, a handle fixed on the speed reducer, and a power trowel handle adjustment and fixing mechanism disposed at the bottom of the handle.

[0010] This utility model relates to a handle adjustment and fixing mechanism for a power trowel. During operation, when the handle needs adjustment, pulling the pull ring backward causes the ratchet plate to rotate backward, disengaging the positioning baffle from its slot. After adjusting the handle position, the ratchet plate rotates forward under the pull of the tension spring, and the positioning baffle engages with the corresponding ratchet plate slot, completing the adjustment process. This is time-saving and convenient, solving the problem of the previous time-consuming and inconvenient method of loosening and tightening the locking bolts and nuts to adjust the height and then tightening them again. At the same time, the components of the handle adjustment and fixing mechanism are simple to manufacture and have a long service life. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a power trowel in the prior art; Figure 2 This is a schematic diagram of the adjustment and fixing mechanism of the power trowel handle of this utility model; Figure 3 This is a schematic diagram of the structure of the power trowel of this utility model.

[0012] In the diagram: 1-Reducer; 2-Power source; 3-Umbrella-shaped protective net; 4-Handle bar; 5-Wire rope lifting mechanism; 6-Diaphragm installation mechanism; 7-Pulling plate; 8-Handle handle; 9-Ratchet plate; 10-Slot; 11-Pull ring; 12-Positioning baffle; 13-Tension spring; 14-Tension spring fixing plate; 15-First rotating structure; 16-Second rotating structure. Detailed Implementation

[0013] 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.

[0014] Example 1 A trowel handle adjustment and fixing mechanism, such as Figure 2As shown, the handlebar 8 is rotatably mounted at the bottom of the handlebar 4 via a first rotating structure 15, a ratchet plate 9 is rotatably mounted at the bottom of the handlebar via a second rotating structure 16, a tension spring fixing plate 14 is fixed to the bottom of the handlebar, and a tension spring 13 connects the tension spring fixing plate and the bottom of the ratchet plate. The second rotating structure is located behind the first rotating structure, and the tension spring fixing plate is located in front of the first rotating structure. The ratchet plate is an arc-shaped plate with multiple slots 10 evenly distributed from top to bottom on its leading edge. The handlebar has a positioning baffle 12 that is fixedly engaged with the slots. A pull ring 11 is rotatably mounted at the bottom of the ratchet plate. In this embodiment, both the first and second rotating structures are prior art, and both include a hinge shaft and a hinge plate fixed to the lower surface of the handlebar.

[0015] In this embodiment, the handle adjustment and fixing mechanism of the power trowel operates as follows: When the handle needs to be adjusted, pulling the pull ring backward causes the ratchet plate to rotate backward, and the positioning baffle disengages from the ratchet plate's slot. After adjusting the handle position, the ratchet plate rotates forward under the pull of the tension spring, and the positioning baffle engages with the corresponding ratchet plate slot, completing the adjustment process. This is time-saving and convenient, solving the problem of the original method of loosening and tightening the locking bolts and nuts, adjusting the height, and then tightening them again, which was time-consuming and inconvenient. At the same time, the components of the handle adjustment and fixing mechanism are simple to manufacture and have a long service life.

[0016] Example 2 A type of power trowel, such as Figure 2 , Figure 3 As shown, the assembly includes a speed reducer 1, a power source 2 that drives the speed reducer, an umbrella-shaped protective net 3 fixed on the speed reducer, a handle 4 fixed on the speed reducer, a wire rope lifting mechanism 5 provided on the handle, a diaphragm mounting mechanism 6, and a trowel 7. All of these are existing technologies and will not be described in detail here. The bottom of the handle 4 is provided with a trowel handle adjustment and fixing mechanism as described in Example 1.

Claims

1. A trowel machine handle adjustment and fixing mechanism, characterized in that: It includes a handlebar that is tilted and rotated at the bottom of the handlebar via a first rotating structure, a ratchet plate that is tilted and rotated at the bottom of the handlebar via a second rotating structure, a tension spring fixing plate fixed to the bottom of the handlebar, and a tension spring connecting the tension spring fixing plate and the bottom of the ratchet plate. The second rotating structure is located behind the first rotating structure, and the tension spring fixing plate is located in front of the first rotating structure. The ratchet plate is an arc plate with multiple slots evenly distributed from top to bottom on the front edge of the ratchet plate. The handlebar has a positioning baffle that is fixedly engaged with the slots.

2. The trowel machine handle adjustment and fixing mechanism according to claim 1, characterized in that: The bottom of the ratchet plate is equipped with a pull ring that allows for pitch and rotation.

3. The troweling machine handle adjustment and fixing mechanism according to claim 2, characterized in that: Both the first and second rotating structures include a hinge shaft and a hinge plate fixed to the lower surface of the handlebar.

4. A power trowel, characterized in that: It includes a speed reducer, a handle on the speed reducer, and a power trowel handle adjustment and fixing mechanism as described in claim 3, which is located at the bottom of the handle.

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