A vibrating trowel for road construction

Abstract

This utility model discloses a vibratory trowel for road construction, comprising a trowel plate and a handle. One end of the handle is connected to the back of the trowel plate. The handle has an axial inner cavity, within which a vibrator and a battery are housed, with the battery supplying power to the vibrator. By placing the vibrator within the axial inner cavity of the handle, the drawback of directly mounting the vibrator on the trowel plate, which prevents trowel plate replacement, is effectively overcome. This design can drive the trowel plate to vibrate while preventing the vibrator from directly contacting the external environment, thus protecting the equipment. Simultaneously, this integrated design facilitates modular construction within the handle, simplifies the trowel plate structure, and aids in subsequent maintenance and replacement, equipment center of gravity / balance adjustment, and improved waterproofing and electrical safety performance.

Description

Technical Field

[0001] This utility model relates to the field of road construction technology, and in particular to a vibratory trowel for road construction. Background Technology

[0002] In road and bridge paving construction, smoothing and finishing the poured concrete is a crucial step, significantly impacting the smoothness, density, and durability of the resulting pavement. While some fully mechanized, intelligent smoothing tools have emerged in the context of rapid advancements in engineering technology, their high cost, difficulty in working small areas and corners, and limited application conditions limit their use. Therefore, currently, the tools used for smoothing and finishing concrete paving are still primarily hand-operated trowels made of materials such as stainless steel, manganese steel, and magnesium alloy. The tools used vary depending on the specific project. For example: 1. Small trowels are used for leveling and smoothing, but these tools have a small working area, low efficiency, and difficulty in finding road surface reference points. 2. Disc trowels are used for smoothing and polishing, but these machines are large, heavy, difficult to transport, require fuel, and are uneconomical and environmentally unfriendly.

[0003] To address the aforementioned issues, Chinese invention application No. 202411725571.1 proposes a dual-purpose trowel and integrated tool for smoothing and finishing concrete mortar, enabling continuous smoothing and finishing of concrete floors on the same tool, significantly improving construction efficiency. Chinese utility model patent application No. 201320197244.4 proposes a construction trowel connected by a traction swing bracket, featuring a simple structure, convenient operation, and long service life. Chinese utility model patent application No. 200720012090.1 proposes an adjustable-speed electric trowel, which, by incorporating a geared motor and control switch, allows the motor to drive the trowel plate to rotate for finishing operations, reducing labor intensity and improving work efficiency.

[0004] While the trowels proposed in the aforementioned patents improve the structural shape, increase the working area, and reduce the difficulty of operation, thus enhancing overall construction efficiency and being environmentally friendly, these trowels lack vibration functionality. They cannot efficiently extract grout while smoothing the concrete surface, making it difficult to ensure uniform mortar distribution within the concrete surface. This results in insufficient mortar coverage on the concrete surface, preventing the formation of a smooth protective layer. Chinese utility model application number 202020408955.1 proposes a handheld vibrating trowel that uses a low-voltage motor to drive a vibrator for simultaneous pressing and vibration, replacing rubber or wooden mallets for compacting lining mortar. Although this handheld vibrating trowel adds vibration functionality, its handle is integrated with the trowel board, and the vibrator is fixed to the board, making it susceptible to damage during operation. Furthermore, it makes it difficult to replace trowels of different sizes. Additionally, the handle is too short, limiting its application to small areas and making it unsuitable for large-area construction in road and bridge paving. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to propose a vibratory trowel for road construction that can protect the vibrator and easily change the trowel specifications, in light of the above-mentioned technical status.

[0006] The second technical problem to be solved by this utility model is to propose a vibratory trowel for road construction that can adjust the length of the handheld part, in light of the above-mentioned technical status.

[0007] The technical solution adopted by this utility model to solve the first technical problem mentioned above is as follows: a vibratory trowel for road construction, comprising a trowel plate and a handle, one end of which is connected to the back of the trowel plate. The handle has an axial inner cavity, in which a vibrator and a battery are disposed, and the battery powers the vibrator.

[0008] Compared to existing technologies, this invention effectively overcomes the drawback of directly mounting the vibrator on the squeegee, which prevents squeegee replacement, by placing the vibrator within the axial inner cavity of the handle. This design drives the squeegee to vibrate while preventing the vibrator from directly contacting the external environment, thus protecting the equipment. Simultaneously, this integrated design facilitates modular construction within the handle, simplifies the squeegee structure, and aids in subsequent maintenance and replacement, equipment center of gravity / balance adjustment, and improved waterproofing and electrical safety performance.

[0009] To ensure that the vibrator and battery can be confined and fixed within the grip and to prevent interference between the vibrator and battery, preferably, the grip is provided with multiple partitions that divide the axial inner cavity along a tangential plane. The vibrator is confined between two adjacent partitions, and the battery is confined between another two adjacent partitions.

[0010] To mitigate vibration, a vibration-damping sleeve is preferably fitted over the top of the grip. The vibration-damping sleeve also enhances grip friction, facilitating construction operations.

[0011] To facilitate battery replacement, preferably, the part of the grip corresponding to the battery is a detachable battery cover, which is fixedly installed to the main body of the grip by anchor bolts.

[0012] To allow the handle to rotate relative to the squeegee, thus increasing the freedom of operation, preferably, the connecting end of the handle connected to the squeegee is fitted with a connecting sleeve, the connecting sleeve extending toward the squeegee to form two opposing ears, and a first through hole is provided on the ears;

[0013] The back of the squeegee is provided with a connecting seat, and the connecting seat has a second through hole corresponding to the first through hole of the ear. The bolt shaft passes through the first through hole and the second through hole, so that the handle and the squeegee are hinged by the pin shaft.

[0014] Preferably, the back of the trowel is provided with at least two raised reinforcing ribs, each with a first stud hole. The connecting seat has a second stud hole corresponding to the first stud hole on the reinforcing rib, and the stud passes through both the first and second stud holes to fix the connecting seat to the reinforcing rib. All components are fixed using bolts and threads, allowing for easy disassembly, storage, and replacement. Therefore, the trowel size can be freely changed, and the working area is adjustable, making it suitable for large-area and corner work. Furthermore, the handle and trowel are connected using high-strength bolts, which, compared to conventional snap-fit ​​electric trowels, are less prone to deformation and breakage under high-frequency vibration, resulting in better durability of the connector.

[0015] Preferably, the reinforcing rib is a steel section welded to the back of the trowel, and the reinforcing rib extends in the same direction as the length of the trowel.

[0016] To solve the second technical problem, preferably, the grip bar consists of at least two sleeves, which are stacked in a nested manner.

[0017] Each adjacent sleeve is equipped with a locking structure, which can be selectively locked or unlocked.

[0018] When the locking structure is in the locked state, the sleeves restricted by it are relatively fixed to form the extended state of the grip.

[0019] When the locking structure is in the unlocked state, the sleeves restricted by it can slide relative to each other along the axial direction and nest together to form the retracted state of the grip.

[0020] The nested grip design allows the inner sleeve to slide in or out of the outer sleeve, thus changing the overall length. Users can adjust the grip to different lengths by unlocking, sliding, and locking as needed. This length adjustment adapts to various work scenarios without requiring the use of different length trowels.

[0021] The sleeve closest to the trowel is designated as the base tube. The vibrator and battery are housed within the base tube, with the vibrator positioned closer to the trowel than the battery. The vibrator, integrated into the base tube of the handle, enhances vibration during troweling, efficiently extracting slurry, ensuring uniform mortar distribution within the concrete, improving construction quality, and guaranteeing the smoothness, density, and durability of the finished pavement. Preferably, a lithium battery powers the vibrator, facilitating free movement of the trowel without being restricted by a fixed power source. The lithium battery is also easily removable and replaceable, effectively guaranteeing the required working time. Furthermore, housing the vibrator and battery within the base tube maximizes space utilization without hindering the free extension and retraction of the handle.

[0022] To provide a simple and easy-to-operate locking structure, preferably, the locking structure includes a locking pin and a spring piece. The locking pin passes through the pipe wall of the nested overlapping part of two adjacent sleeves, and the spring piece is disposed inside the sleeve and acts elastically on the locking pin.

[0023] Under normal conditions, the locking pin protrudes outward under the action of the spring piece and engages in the corresponding mating hole of the overlapping part of the two sleeves to lock the relative position of the two sleeves.

[0024] When the locking pin is pressed, the locking pin retracts inward against the elastic force of the spring, releasing the lock on the two sleeves.

[0025] When the locking pin is released and the two sleeves slide relative to each other along the axial direction of the gripping rod until the corresponding mating holes overlap, the locking pin is driven to protrude outward again and lock into the corresponding mating holes under the action of the spring plate, thus relocking the two sleeves. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model, wherein the grip in (a) is in an extended state and the grip in (b) is in a retracted state;

[0027] Figure 2 This is a schematic diagram of the sleeve structure according to an embodiment of the present utility model;

[0028] Figure 3 This is a cross-sectional view of the locking structure according to an embodiment of the present utility model;

[0029] Figure 4 This is a cross-sectional view of the base tube according to an embodiment of the present utility model;

[0030] Figure 5This is an enlarged schematic diagram of the squeegee area according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the base tube structure according to an embodiment of the present utility model;

[0032] Figure 7 This is an exploded view of the base tube in an embodiment of the present invention. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figures 1-7 The image shows a preferred embodiment of a vibratory trowel for road construction according to this utility model.

[0035] The vibratory trowel of this embodiment includes a trowel plate and a retractable handle 2, one end of which is connected to the back of the trowel plate 1. The handle 2 has a hollow structure along its own axis, with an axial inner cavity 201. A vibrator 6 and a battery 4 are disposed inside the axial inner cavity 201, and the battery 4 supplies power to the vibrator 6. A damping sleeve 202 is fitted on the top of the handle 2 to dampen vibration and enhance grip friction.

[0036] The grip 2 consists of at least two sleeves 21, which are nested and stacked sequentially. In this embodiment, there are a total of five sleeves 21, and each adjacent sleeve 21 is provided with a locking structure 3. The locking structure 3 can be locked or unlocked under the user's control. Figure 4 , Figure 6 and Figure 7 As shown, the sleeve 21 closest to the squeegee 1 is designated as the base tube 21a. The vibrator 6 and battery 4 are housed inside the base tube 21a, with the vibrator 6 being closer to the squeegee 1 than the battery 4. This placement of the vibrator 6 and battery 4 within the base tube 21a makes full use of the space without affecting the free extension and retraction of the handle 2. The switch for the vibrator 6 is located outside the base tube.

[0037] The handle 2 has multiple partitions 211 that divide the axial inner cavity 201 along a tangential plane. The vibrator 6 is confined between two adjacent partitions 211, and the battery 4 is confined between two other adjacent partitions 211. The vibrator 6 and the battery 4 each have independent working spaces, reducing mutual interference.

[0038] The part of the grip 2 corresponding to the battery 4 is a removable battery cover 212, such as... Figure 7 As shown, the battery cover 212 is fixedly installed to the main body of the handle 2 by anchor bolts 213. The battery 4 is preferably a lithium battery, which has a power output cable. A perforation is opened in the nearby partition 211, through which the power output cable can be connected to the power input port of the vibrator 6.

[0039] When each locking structure 3 is in the locked state, each sleeve 21 restricted by the locking structure 3 is relatively fixed to form the extended state of the grip 2, such as Figure 1 As shown in (a) above. When each locking structure 3 is in the unlocked state, the sleeves 21 restricted by the locking structure 3 can slide relative to each other axially and retract nested to form the retracted state of the grip 2, as shown in (a). Figure 1 As shown in (b) of the diagram. In this embodiment, each locking structure 3 is designed to be unlocked or locked individually, without interlocking with each other. When unlocked, the inner sleeve 21 can slide into or out of the outer sleeve 21, thereby changing the overall length. Users can adjust the handle 2 to different lengths according to their actual needs by unlocking, sliding, and then locking. By adjusting the length, it can adapt to various different working scenarios without the need to replace it with a special trowel of different lengths.

[0040] In this embodiment, the locking structure 3 includes a latch 31 and a spring piece 32, such as Figure 2 and Figure 3 As shown, the locking pin 31 passes through the pipe wall of the nested overlapping part of the two adjacent sleeves 21, and the spring piece 32 is disposed inside the sleeve 21 and acts elastically on the locking pin 31. The spring piece 32 is disposed at the end of the sleeve 21 away from the trowel 1, and includes two oppositely disposed elastic side plates that open in a V shape. The locking pin 31 is fixedly connected to the elastic side plates.

[0041] Under normal conditions, the locking pin 31 protrudes outward under the action of the spring piece 32 and engages with the corresponding mating holes of the overlapping parts of the two sleeves 21 to lock the relative positions of the two sleeves 21. When the locking pin 31 is pressed, it retracts inward against the elastic force of the spring piece 32, releasing the lock on the two sleeves 21. When the locking pin 31 is released and the two sleeves 21 slide relative to each other along the axial direction of the handle 2 until the corresponding mating holes overlap, the locking pin 31 is driven to protrude outward again under the action of the spring piece 32 and engage with the corresponding mating holes, relocking the two sleeves 21. Since the locking structure 3 is located at the far end of the sleeve 21, the overlap between the sleeves 21 is smaller when the handle 2 is extended, and the handle 2 can extend for a longer length.

[0042] like Figure 5 As shown, to allow the handle 2 to rotate relative to the squeegee 1 and thus increase the freedom of operation, a connecting sleeve 5 is fitted onto the connecting end of the handle 2 and the squeegee 1. The connecting sleeve 5 extends toward the squeegee 1 to form two opposing ears 51, each ear 51 having a first through hole. A connecting seat 11 is provided on the back of the squeegee 1, and a second through hole corresponding to the first through hole of the ear 51 is provided on the connecting seat 11. A bolt shaft passes through the first and second through holes, so that the handle 2 and the squeegee 1 are hinged together by a pin 12.

[0043] The back of the trowel 1 is provided with at least two raised reinforcing ribs 13, which extend in the same direction as the length of the trowel 1. These ribs are made of stainless steel or similar materials and have first stud holes. The connecting seat 11 has second stud holes corresponding to the first stud holes in the reinforcing ribs 13. Studs 14 pass through both the first and second stud holes, fixing the connecting seat 11 to the reinforcing ribs 13. All components are fixed using bolts and threads, allowing for easy disassembly, storage, and replacement. Therefore, the size of the trowel 1 can be freely changed, and the working area is adjustable, making it suitable for large-area and corner work. Furthermore, the handle 2 is connected to the trowel 1 using high-strength bolts. Compared to conventional snap-fit ​​electric trowels, these bolts are less prone to deformation and breakage under high-frequency vibration, resulting in better durability of the connectors.

Claims

1. A vibratory trowel for road construction, comprising a trowel plate (1) and a handle (2), one end of the handle (2) being connected to the back of the trowel plate (1), characterized in that, The grip (2) has an axial inner cavity (201), in which a vibrator (6) and a battery (4) are disposed, and the battery (4) supplies power to the vibrator (6).

2. The vibratory trowel according to claim 1, characterized in that, The grip (2) is provided with a plurality of partitions (211) that divide the axial inner cavity (201) along the tangential plane. The vibrator (6) is confined between two adjacent partitions (211), and the battery (4) is confined between two other adjacent partitions (211).

3. The vibratory trowel according to claim 1, characterized in that, The grip (2) is fitted with a damping sleeve (202) at the top.

4. The vibratory trowel according to claim 1, characterized in that, The part of the grip (2) corresponding to the battery (4) is a detachable battery cover (212), which is fixedly installed to the main body of the grip (2) by anchor bolts (213).

5. The vibratory trowel according to claim 1, characterized in that, The connecting end of the handle (2) connected to the smear (1) is fitted with a connecting tube (5), and the connecting tube (5) extends toward the smear (1) to form two opposing ears (51), and the ears (51) are provided with a first through hole; The back of the squeegee (1) is provided with a connecting seat (11), and the connecting seat (11) is provided with a second through hole corresponding to the first through hole of the ear (51). The bolt shaft passes through the first through hole and the second through hole, so that the handle (2) and the squeegee (1) are hinged together by the pin (12).

6. The vibratory trowel according to claim 5, characterized in that, The back of the trowel (1) is provided with at least two raised reinforcing ribs (13), and the reinforcing ribs (13) are provided with first stud holes; the connecting seat (11) is provided with second stud holes corresponding to the first stud holes of the reinforcing ribs (13), and studs (14) pass through the first stud holes and the second stud holes to fix the connecting seat (11) and the reinforcing ribs (13) in a fixed connection.

7. The vibratory trowel according to claim 6, characterized in that, The reinforcing rib (13) is a steel section welded to the back of the trowel (1), and the reinforcing rib (13) extends in the same direction as the length of the trowel (1).

8. The vibratory trowel according to claim 1, characterized in that, The grip (2) consists of at least two sleeves (21) which are stacked in a nested manner. Each adjacent sleeve (21) is provided with a locking structure (3), which can be selectively in a locked state or an unlocked state. When the locking structure (3) is in the locked state, the sleeves (21) restricted by it are relatively fixed to form the extended state of the grip (2); When the locking structure (3) is in the unlocked state, the sleeves (21) restricted by it can slide relative to each other along the axial direction and nest and retract to form the retracted state of the grip (2).

9. The vibratory trowel according to claim 8, characterized in that, The sleeve (21) closest to the smear (1) is referred to as the base tube (21a). The vibrator (6) and the battery (4) are disposed inside the base tube (21a), with the vibrator (6) being closer to the smear (1) than the battery (4).

10. The vibratory trowel according to claim 9, characterized in that, The locking structure (3) includes a locking pin (31) and a spring piece (32). The locking pin (31) passes through the wall of the overlapping part of the two adjacent sleeves (21). The spring piece (32) is disposed in the sleeve (21) and acts elastically on the locking pin (31). Under normal conditions, the locking pin (31) protrudes outward under the action of the spring piece (32) and is locked into the corresponding mating hole of the overlapping part of the two sleeves (21) to lock the relative position of the two sleeves (21); When the locking pin (31) is pressed, the locking pin (31) retracts inward against the elastic force of the spring (32), releasing the lock on the two sleeves (21); When the locking pin (31) is released and the two sleeves (21) slide relative to each other along the axial direction of the grip (2) until the corresponding mating holes overlap, the locking pin (31) is driven to protrude outward again and be locked into the corresponding mating hole under the action of the spring piece (32), thus relocking the two sleeves (21).

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