Ground cutter

Abstract

The ground cutting machine according to the invention may include: a main frame for supporting equipment required for cutting the ground; a plurality of front wheels positioned at the front of the main frame when the ground cutting machine's forward direction is forward and the opposite direction is rearward; at least one rear wheel positioned at the rear of the main frame; a cutting frame, which is a separate frame from the main frame, with one side fixed near the rear of the main frame and the other side movable vertically; a cutting shaft positioned near the other side of the cutting frame; and cutting blades capable of being fitted into both ends of the cutting shaft.

Description

Technical Field

[0001] This invention relates to a floor cutter configured to cut surfaces, such as concrete surfaces. Background Technology

[0002] Existing ground cutting mechanisms result in the cutting blade being attached to the main frame and moving upward and downward according to the movement of the main frame.

[0003] Figure 1 This is a view showing a conventional floor cutter.

[0004] Reference Figure 1 As can be seen, when the position of the front wheels is adjusted, the main frame moves up and down around the rear wheels, which serve as the axis. Additionally, the cutting blades attached to the main frame are also visible to move.

[0005] In conventional (or existing) floor cutters as described above, the cutting blade is attached to the main frame, and therefore, the cutting blade cannot move independently. That is, the main frame also moves to adjust the cutting blade up and down. Therefore, the main frame is tilted relative to the ground, as... Figure 1 As shown in the image. Conventional floor cutters have the following problem: when the main frame is tilted relative to the ground, the entire conventional floor cutter (or the body of the conventional floor cutter) tilts, making it difficult to fix the dust hood, and therefore impossible to install the dust hood.

[0006] In addition, conventional ground cutters have the following problems: for ground cutters configured to be powered by the rear wheels, the angle of the ground cutter changes when the main frame is tilted, and it is difficult to adjust the angle of the ground cutter.

[0007] In addition, conventional floor cutters have the following problem: workers lift the handle located at the rear of the floor cutter to move it; however, when the main frame is tilted, the load is applied to the rear of the floor cutter, and therefore, it is not easy for workers to move the floor cutter.

[0008] In addition, conventional ground cutting machines have the following problems: it is difficult to change the direction and adjust the cutting angle, which greatly degrades the cutting performance. Summary of the Invention

[0009] Technical issues

[0010] The purpose of this invention is to provide a floor cutting machine that can solve the problems associated with the above-mentioned conventional floor cutting machines.

[0011] The present invention is designed to solve problems for purposes not limited to those described above, and other unmentioned purposes will be clearly understood by those skilled in the art based on the following detailed description of the invention.

[0012] Technical solutions

[0013] To achieve the above objectives, the ground cutting machine according to the present invention includes: a main frame configured to support equipment required for cutting the ground; a plurality of front wheels, assuming the forward direction of the ground cutter is forward and the opposite direction is rearward, the plurality of front wheels being located on opposite sides of the front portion of the main frame; at least one rear wheel, the at least one rear wheel being located at the rear portion of the main frame; a cutting frame, which is a frame separate from the main frame, one side of the cutting frame being fixed to a location near the rear portion of the main frame, and the other side of the cutting frame being configured to move upward and downward; and a cutting blade mounted on the opposite side of a cutting axis, the cutting axis being located near the other side of the cutting frame.

[0014] One side of the cutting frame can be hinged to the vicinity of the rear of the main frame, and the ground cutting machine may also include a first hydraulic cylinder that connects the main frame and the cutting frame between them. The first hydraulic cylinder is configured to move the other side of the cutting frame upward and downward. The first hydraulic cylinder can be operated by an operator to move the other side of the cutting frame upward and downward, and to move the cutting blade located near the other side of the cutting frame upward and downward.

[0015] The ground cutter may also include an auxiliary wheel positioned further forward than at least one rear wheel. Assuming the auxiliary wheel moves up and down via a second hydraulic cylinder located at its upper end, when the auxiliary wheel is in the upper position, the ground cutter can be supported on the ground by multiple front wheels and multiple rear wheels, thus enabling it to operate in a four-wheel drive mode. When the auxiliary wheel is in the lower position, at least one rear wheel may not be in contact with the ground, and the ground cutter can also be supported on the ground by multiple front wheels and multiple auxiliary wheels, thus enabling it to operate in a four-wheel drive mode as well.

[0016] When the rear wheel is set to one (three-wheel drive), the ground cutter may also include a direction adjustment cylinder (hydraulic or electric) connected to the rear wheel, which is configured to adjust the rotation or direction of the rear wheel.

[0017] The ground cutter may also include: a power motor configured to provide power to the ground cutter; and a reducer connected between the power motor and the rear wheel, the reducer being configured to control the forward movement of the ground cutter.

[0018] The ground cutter may also include a power motor and a reducer located at the upper end of the cutting frame, wherein the shield may be supported by multiple support frames connected to the main frame, and the shield may be configured to protect the power motor and reducer.

[0019] Each cutting blade in the cutting blade may have an annular cross-section, and recesses configured to cut the ground may be provided at predetermined intervals on the outer periphery of the annular shape.

[0020] The floor cutter (four-wheel floor cutter or three-wheel floor cutter) may also include a wireless controller configured to wirelessly control the power motor and reducer.

[0021] Beneficial effects

[0022] The present invention has the following effect: the cutting blade is attached to a cutting frame that is separate from the main frame, thereby allowing the cutting blade to move without relying on the main frame.

[0023] The present invention has the following advantages: in addition to the front wheel and the rear wheel, it also includes an auxiliary wheel, thereby making it easy to adjust the direction of the cutting machine.

[0024] According to the invention, the cutting blade is attached to a cutting frame separate from the main frame, thereby enabling the manufacture of a three-wheeled ground cutter with one rear wheel and two front wheels, and thus allowing for changes in direction and adjustment of the cutting speed.

[0025] According to the invention, the cutting blade is attached to a cutting frame that is separate from the main frame, thereby allowing the dust collection hood to be fixed and installed on the ground cutter.

[0026] According to the present invention, the dust collection hood is connected separately to the ground cutter, thereby significantly improving the dust collection and sound insulation effects during cutting operations.

[0027] The effects that can be obtained from this invention are not limited to those mentioned above, and other unmentioned effects can be clearly understood by those skilled in the art based on the following description. Attached Figure Description

[0028] Figure 1 This is a view showing a conventional floor cutter.

[0029] Figure 2 This is a view showing a ground cutting machine according to an embodiment of the present invention.

[0030] Figure 3 This is a view showing a ground cutter according to an embodiment of the present invention, viewed from below.

[0031] Figure 4This is a view showing an auxiliary wheel according to an embodiment of the present invention.

[0032] Figure 5 This is a view showing a floor cutter connected with a dust collection hood according to another embodiment of the present invention.

[0033] Figure 6 This is a view specifically showing a dust collection hood according to another embodiment of the invention.

[0034] Figure 7 This is a view showing a three-wheeled ground cutter according to another embodiment of the present invention.

[0035] Figure 8 This is a view showing the power motor (hydraulic motor / electric motor) installed in the ground cutter according to the invention. Detailed Implementation

[0036] Preferred embodiments of the invention will now be described in detail with reference to the accompanying drawings. The detailed description given below with reference to the drawings is intended to explain exemplary embodiments of the invention, and not merely to show embodiments that can be implemented according to the invention. The following detailed description includes specific details in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without these specific details.

[0037] The following detailed description of the invention will be given by way of example with reference to the accompanying drawings illustrating specific embodiments upon which the invention can be implemented. These embodiments will be described in detail to the extent that those skilled in the art can implement the invention. It should be understood that the various embodiments of the invention differ from one another, but are not necessarily mutually exclusive. For example, a particular shape, structure, and feature of one embodiment described herein may be implemented as another embodiment without departing from the spirit and scope of the invention. Furthermore, it should be understood that the position or arrangement of individual elements in each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Therefore, the following detailed description is not limiting, and if properly described, the scope of the invention is defined only by the appended claims and all their equivalents. In the drawings, similar reference numerals denote the same or similar functions in several aspects.

[0038] In some cases, to avoid ambiguity in the concept of the invention, known structures and devices may be omitted, or the core function of each structure and device may be shown as a block diagram. Furthermore, throughout this specification, the same elements are represented by the same reference numerals.

[0039] In the following, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can readily implement the present invention.

[0040] First, as mentioned earlier, Figure 1 This is a view showing a conventional floor cutter.

[0041] In a conventional ground cutting machine, the rear wheel is located on one side of the main frame, and the cutting blade is located on the other side of the main frame. The cutting blade is configured to move simultaneously with the movement of the main frame.

[0042] The front wheel, attached to the lower end of the main frame, can be adjusted to regulate the operation (tilt) of the main frame. Specifically, the up-and-down movement of the cutting blade can be adjusted around the rear wheel, which is fixed to the main frame.

[0043] Therefore, in a conventional floor cutter, the cutting blade always moves together with the main frame. That is, in a conventional floor cutter, the main frame also moves to adjust the cutting blade up and down. Consequently, the main frame is tilted relative to the ground, such as... Figure 1 As shown in the image. Conventional floor cutters have the following problem: when the main frame is tilted relative to the ground, the entire conventional floor cutter (or the body of the conventional floor cutter) tilts, making it difficult to fix the dust hood, and therefore impossible to install the dust hood.

[0044] In addition, conventional floor cutters have the following problems: For floor cutters configured to provide power to the rear wheels, the angle of the floor cutter changes when the main frame tilts, and it is difficult to adjust the angle of the floor cutter. Furthermore, conventional floor cutters have the following problem: When a worker lifts a handle located at the rear of the floor cutter to move it, however, when the main frame tilts, the load is applied to the rear of the floor cutter, making it difficult for the worker to move the floor cutter. Additionally, conventional floor cutters have the following problem: changing direction and adjusting the cutting angle are difficult, thus significantly degrading cutting performance. To solve these problems, the floor cutter proposed in this invention includes a cutting frame in addition to the main frame, and is configured such that the cutting blade moves independently relative to the main frame. This will be described below.

[0045] Figure 2 This is a view showing a ground cutting machine according to an embodiment of the present invention. Specifically, Figure 2 (a) is a view showing the cutting blade not moving upwards, and Figure 2 (b) is a view showing the state of the cutting blade moving upwards.

[0046] in addition, Figure 3This is a view showing a ground cutter according to an embodiment of the present invention, viewed from below.

[0047] In the following text, to aid understanding of the description, the direction in which the ground cutter moves forward during cutting will be defined as forward, and the opposite direction will be defined as backward.

[0048] Reference Figure 2 The ground cutting machine may include a main frame 100, a cutting frame 200, a cutting blade 300, a rear wheel 110, a front wheel 120, a shield 130, a support frame 131, a hinged portion 210, a power motor 220, a cutting shaft 230, and a first hydraulic cylinder S. Here, the term "first hydraulic cylinder S" is used for descriptive purposes. However, the invention is not limited thereto, and various cylinders, such as electric cylinders, may be used.

[0049] Typically, a floor cutter cuts the ground in a straight line (e.g., concrete or rock). For this purpose, the floor cutter may include a power engine / motor and a reducer. The main frame 100 can support the equipment required for cutting the ground, such as the power engine / motor and reducer. The equipment may be positioned directly or indirectly at the upper end of the main frame. As described above, the main frame 100 is a frame constructed to support the floor cutter.

[0050] Multiple (e.g., two) rear wheels 110 may be located near the rear of the main frame 100 (e.g., on the opposite side of the rear of the main frame), and multiple (e.g., two) front wheels 120 may be located near the front of the main frame 100 (e.g., on the opposite side of the front of the main frame). Here, the diameter of the front wheels 120 may be smaller than the diameter of the rear wheels 110.

[0051] Reference Figure 2 and Figure 3 The ground cutter 10, configured to provide power to the rear wheels 110, can be a four-wheel drive system. In this invention, a four-wheel drive system can refer to a system in which power from an engine is transmitted to four wheels, or a system comprising four wheels.

[0052] Reference Figure 3 As can be seen, the two front wheels 120 are connected to each other via the front axle 121, and the two rear wheels 110 are connected to each other via the rear axle 111.

[0053] Next, the ground cutting machine according to the present invention may include a cutting frame 200. One side of the cutting frame 200 may be fixed to the vicinity of the rear of the main frame 100, and the other side of the cutting frame may move upward and downward.

[0054] Alternatively, the cutting shaft 230 may be located near the other side of the cutting frame 200, and the cutting blade 300 may be mounted on the opposite side of the cutting shaft 230.

[0055] As from Figure 2 As can be seen, one side of the cutting frame 200 is hinged to the vicinity of the rear of the main frame 100 via the hinge portion 210. That is, with one side of the cutting frame 200 fixed, the other side of the cutting frame faces downwards. Figure 2 (a) or upward ( Figure 2 (b) The cutting blade 300, located near the other side of the cutting frame, also moves upward and downward.

[0056] A hydraulic cylinder S (hereinafter referred to as the first hydraulic cylinder for distinction from the hydraulic cylinder described below) can be configured as the power source required to move the cutting frame 200. The first hydraulic cylinder S can be connected between the main frame 100 and the cutting frame 200 to move the other side of the cutting frame 200 upward and downward.

[0057] In other words, when the length of the first hydraulic cylinder S increases due to the movement of the piston in the first hydraulic cylinder S, the other side of the cutting frame 200 moves upward, and when the length of the first hydraulic cylinder decreases, the other side of the cutting frame 200 moves downward. The worker can control the upward and downward movement of the cutting blade 300 by manipulating only the first hydraulic cylinder S.

[0058] Figure 4 This is a view showing an auxiliary wheel according to an embodiment of the present invention.

[0059] Reference Figure 4 In addition to the components listed below, the ground cutting machine may also include an auxiliary wheel 400 and a second hydraulic cylinder 410: a main frame 100, a cutting frame 200, a cutting blade 300, a rear wheel 110, a front wheel 120, a shield 130, a support frame 131, a hinged portion 210, a power motor 220, a cutting shaft 230, and a first hydraulic cylinder S. Similarly, for descriptive purposes, the term "second hydraulic cylinder 410" is used. However, the invention is not limited thereto, and various cylinders, such as electric cylinders, may be used.

[0060] Figure 4 (a) shows the state where the auxiliary wheel 400 is moving upwards, and Figure 4 (b) shows the state where the auxiliary wheel 400 is moving downwards.

[0061] First, the training wheel 400 is positioned further forward than the rear wheel 110. Specifically, the training wheel can be positioned between the front wheel 120 and the rear wheel 110, closer to the rear wheel 110.

[0062] For example, two auxiliary wheels 400 are included in the ground cutter, and the two auxiliary wheels 400 can be located in front of the two rear wheels 110 respectively.

[0063] The auxiliary wheel 400 can be moved up and down by a second hydraulic cylinder 410 located at the upper end of the auxiliary wheel. That is, the worker can control the position of the auxiliary wheel 400 by operating the second hydraulic cylinder 410.

[0064] The second hydraulic cylinder 410 may be located between two support frames 131 (configured as a support shield 130), which will be described below. Specifically, the second hydraulic cylinder may be located immediately behind the front support frame, which is one of the two support frames 131.

[0065] When the auxiliary wheel 400 is in the upper position, the auxiliary wheel 400 is not in contact with the ground, and the ground cutter 10 is supported on the ground by the two front wheels 120 and the two rear wheels 110, so that the ground cutter operates in four-wheel drive mode.

[0066] When the auxiliary wheels 400 are in the lower position, the two rear wheels 110 are not in contact with the ground, and the ground cutter is supported on the ground by the two front wheels 120 and the two auxiliary wheels 400, thus the ground cutter also operates in four-wheel drive mode. That is to say, the auxiliary wheels 400 can replace the rear wheels 110.

[0067] As mentioned above, the reason why the auxiliary wheel 400 can replace the rear wheel 110 is that, unlike the rear wheel 110, the auxiliary wheel 400 is rotatable, thereby allowing the direction of the auxiliary wheel to be adjusted.

[0068] In other words, the worker can use the second hydraulic cylinder 410 to move the auxiliary wheel 400 downward and rotate the auxiliary wheel 400 to operate the ground cutter 10.

[0069] Meanwhile, although not specifically shown in the figures, the cross-section of the cutting blade 300 according to the invention can have an annular shape, and recesses configured to cut the ground can be provided at predetermined intervals on the outer periphery of the annular shape. The shape of each recess can vary depending on the circumstances. In most cases, the recesses can have a quadrilateral shape.

[0070] The cutting frame 200 according to the invention may include a power motor 220 and a reducer (not shown) disposed at the upper end of the cutting frame 200. The power motor 220 and the reducer, as devices configured to support the movement of the ground cutter 10, may be controlled by a worker or a wireless controller.

[0071] Additionally, multiple support frames 131 connected to the main frame 100 are located at the rear of the ground cutter, and these support frames can support the shield 130. For reference, the shield 130 can protect the power motor 220 and the reducer.

[0072] Figure 5 This is a view showing a floor cutter connected with a dust collection hood according to another embodiment of the present invention. Figure 6 This is a view specifically showing a dust collection hood according to another embodiment of the invention.

[0073] As from Figure 5 As can be seen, the ground cutter may also include a front frame 140 located on the front side of the main frame 100. The front frame 140 may be detachably attached to the main frame 100 by bolts.

[0074] Additionally, the floor cutter may include a second dust hood retaining pin 150 located at the front of the front frame 140 for attaching the dust hood 500. The floor cutter may also include a first dust hood retaining pin 160 located at the main frame 100 adjacent to the rear of the front wheel 120.

[0075] The first dust cover fixing pin 160 and the second dust cover fixing pin 150 are pins for connection with the dust cover 500 according to the present invention.

[0076] Specifically, the first support column 520, the second support column 530, and the third support column 540 can be configured as elements to connect the dust hood 500 to the floor cutter. The first dust hood retaining pin 160 can be inserted into the first support column 520 for connection to the first support column 520, and the second dust hood retaining pin 150 can be inserted into the second support column 530 for connection to the second support column 530.

[0077] That is, a recess can be formed in the lower end of each of the first pillar 520 and the second pillar 530, and the first dust cover fixing pin 160 and the second dust cover fixing pin 150 can be inserted into the corresponding recess.

[0078] Therefore, the dust collection hood 500 can be easily connected to the floor cutter (installed at the floor cutter) and can be easily removed from the floor cutter.

[0079] In addition, the third pillar 540 can connect the upper ends of the first pillar 520 and the second pillar 530 to each other, so that the first pillar 520, the second pillar 530 and the third pillar 540 can be arranged in the form of "[".

[0080] Meanwhile, the movement of the dust collection hood 500 according to the invention is operated by a wire 550 connected and fixed to the upper end of the dust collection hood 500, and the wire operation unit is configured to provide support for the operation of the wire 550.

[0081] The wire manipulation unit may include a controller, such as a joystick 560. Alternatively, the wire manipulation unit may use a hydraulic cylinder to manipulate the movement of the wire 550. For example, the wire manipulation unit may be located near the shield 130.

[0082] One side of the wire 550 can be fixed to the upper end of the dust collection hood 500, the wire can extend on the roller located in the middle part of the third pillar 540, and the other side of the wire can be fixed to the wire operating unit.

[0083] In other words, the wire 550 is the component that connects the wire operating unit and the dust collection hood 500. The movement of the wire 550 can be controlled by the wire operating unit, and the dust collection hood 500, which is fixed to one side of the wire 550, can also move up and down. Since the dust collection hood 500 can move up and down via the wire operating unit, the worker can easily identify the position of the cutting blade or the position to be cut, thereby significantly increasing the worker's cutting speed.

[0084] Meanwhile, the dust collection hood 500, the first support column 520 and the second support column 530 can be connected to each other as described below.

[0085] First, the dust collection hood 500 may be provided with multiple fixing recesses, and the multiple fixing recesses may include a first fixing recess 521, a second fixing recess 522, a third fixing recess 531, and a fourth fixing recess 532. Each fixing recess may have a through-hole formed vertically through the fixing recess, allowing a corresponding support column to be inserted into the through-hole. One surface of the fixing recess is attached and fixed to the dust collection hood 500.

[0086] The first support column 520 can be inserted into a first fixing recess 521 located at the lower end of the first support column 520 and a second fixing recess 522 located at the upper end of the first support column 520 to connect to the dust collection hood 500. The second support column 530 can be inserted into a third fixing recess 531 located at the lower end of the second support column 530 and a fourth fixing recess 532 located at the upper end of the second support column 530 to connect to the dust collection hood 500.

[0087] At this time, a first spring 523 may be provided on the first pillar 520 between the second fixing recess 522 and the third pillar 540, and a second spring 533 may be provided on the second pillar 530 between the fourth fixing recess 532 and the third pillar 540.

[0088] The first spring 523 and the second spring 533 can apply an elastic force to the dust collection cover 500 in the direction toward the ground, thereby making the dust collection cover 500 easily contact the ground.

[0089] The dust collection hood 500 according to the present invention is used to enclose the cutting blade 300 of a floor cutter and to collect dust, water, and sludge generated during the operation of the cutting blade 300 (dust collection effect). In addition, the dust collection hood can remove noise generated during operation (sound insulation effect).

[0090] To achieve both dust collection and sound insulation, the dust collection hood 500 includes the following components.

[0091] First, a rubber cover 580 made of rubber material is attached to the lower end of the dust collection hood 500, and this rubber cover 580 is used to collect waste (such as dust) generated during the operation of the cutting blade 300 so that it is not discharged to the outside. The rubber cover 580 made of rubber material is very useful for collecting water, sludge, etc. so that they do not leak to the ground.

[0092] Additionally, a dust collection port 510 is provided at the rear of the lower end of the dust collection hood 500 to discharge waste collected by the rubber hood 580 at one location. In this embodiment, waste collected by external power can be discharged through the dust collection port 510.

[0093] Additionally, wheels 590 can be provided at each of the front and rear portions of the lower end of the dust collection hood 500, allowing the dust collection hood 500 to be easily moved even during operation. The wheels 590 are attached to the lower outer side of the dust collection hood 500. Two wheels can be provided at each of the left and right sides of the dust collection hood, and therefore, a total of four wheels 590 can be provided.

[0094] For example, during the operation of the cutting blade 300, the rubber cover 580 can come into contact with the ground, thereby maximizing the dust collection and sound insulation effects.

[0095] In this implementation, the wheel 590 can be positioned higher than the rubber cover 580 (approximately 5 mm) during operation, thereby ensuring that the dust collection and sound insulation effects of the rubber cover 580 are not obstructed. When the floor cutter moves, the dust cover 500 can move upward, causing the wheel 590 to move downward.

[0096] In another embodiment, the wheel 590 can be positioned below the rubber cover 580 during operation, with a small gap between the rubber cover 580 and the ground, thereby achieving dust collection and sound insulation effects.

[0097] Meanwhile, a hole 570 can be formed in the dust collection hood 500 so that it extends from the center of the dust collection hood 500 to the lower end, and the central portion of the cutting blade 300 can move up and down in the hole 570. That is, the worker can check the movement of the cutting blade 300 in the hole 570.

[0098] Additionally, multiple brushes can be positioned within the hole 570 (brushes can be attached to the left and right sides of the hole) to cover the hole, preventing waste generated by the cutting blade from escaping to the outside. The brushes can be made of a flexible material, such as rubber, and can have a bendable structure.

[0099] In this invention, only the cutting frame 200 can move up and down while the main frame 100 is fixed, and therefore, the cutting blade 300 fixed to the cutting frame 200 can move up and down.

[0100] Furthermore, unlike existing dust collection hoods, the dust collection hood 500 according to the present invention can move independently relative to the main frame 100, and can be moved up and down by a separate operating unit.

[0101] As described above, since the main frame 100 and the cutting blade 300 move independently relative to each other and the dust collection hood 500 moves independently relative to the main frame 100 and the cutting blade 300, workers can effectively collect the dust generated during work and eliminate noise.

[0102] If the dust hood always covers the cutting blade, it is difficult to find the location to be cut or the position of the cutting blade. In contrast, according to the present invention, even when the cutting blade 300 is below, the worker can move the dust hood 500 upward to accurately position the cutting blade at the location to be cut while visually observing the location to be cut.

[0103] Meanwhile, although not shown, a cutting stop frame can be configured to stop the cutting axis 230 through a simple structure.

[0104] The cutting stop frame can be positioned above the cutting frame 200, and one side of the cutting stop frame can be hinged to the cutting frame 200, allowing the cutting stop frame to move upward and downward. For example, the other side of the cutting stop frame may not be connected to the cutting frame 200, and the cutting shaft 230 may be located below the other side of the cutting stop frame. Additionally, the power motor 220 and the reducer may be located above the cutting stop frame.

[0105] As the cutting stop frame moves downward, pressure is applied to the cutting shaft 230 attached to the cutting frame 200 due to the weight of the cutting stop frame, the power motor 220, and the reducer. That is, due to the weight of the cutting stop frame, a force is applied downward to the cutting shaft, thereby preventing the cutting blade 300 from operating and thus stopping the cutting.

[0106] In other words, the worker can stop the cutting blade 300 by simply moving the cutting stop frame, thereby stopping the cutting operation.

[0107] Figure 7 This is a view showing a three-wheeled ground cutter according to another embodiment of the present invention.

[0108] exist Figure 2 The ground cutting machine shown in the figure, according to an embodiment of the present invention, is a four-wheeled ground cutting machine with four wheels. (See also...) Figure 7 The two rear wheels 110 are not located on the opposite side of the rear of the main frame 100, but rather one rear wheel 110' is located in the middle of the rear of the main frame 100.

[0109] Therefore, a three-wheeled ground cutter can be constructed with a structure including two front wheels 120 and a rear wheel 110'.

[0110] Figure 7 The floor cutter shown has the advantage that the rear wheel 110' is rotatable, thereby allowing adjustment of the direction of forward movement of the floor cutter 10. In existing floor cutters, direction adjustment is not possible, and most floor cutting mechanisms result in movement while being held by the operator. Figure 7 The rotation of the rear wheel 110' of the floor cutter shown can be operated by a worker. That is, the worker can use a controller or remote controller to adjust the rotation and direction of the rear wheel 110' to control the movement of the floor cutter. The direction of the rear wheel 110' can be adjusted by a direction adjustment cylinder (not shown) connected to the rear wheel 110'. The direction adjustment cylinder (not shown) can be a hydraulic direction adjustment cylinder or a motor-driven hydraulic direction adjustment cylinder.

[0111] The direction of a three-wheeled floor cutter can be easily changed, and therefore, it can rotate 360 ​​degrees. Consequently, a three-wheeled floor cutter can perform circular cutting.

[0112] Meanwhile, the three-wheeled ground cutter may include an auxiliary wheel 400 located on the opposite side of the three-wheeled ground cutter at the front of the rear wheel 110', and the auxiliary wheel 400 may be moved up and down by a second hydraulic cylinder 410 located at the upper end of the auxiliary wheel 400.

[0113] When the auxiliary wheels 400 are in the upper position, the ground cutter is supported on the ground by the two front wheels 120 and the rear wheel 110', thus operating in a three-wheel drive mode. When the auxiliary wheels 400 are in the lower position, the rear wheel 110' is not in contact with the ground, and the ground cutter is supported on the ground by the two front wheels 120 and the two auxiliary wheels 400, thus operating in a four-wheel drive mode.

[0114] For example, the only difference between a three-wheeled floor cutter and a four-wheeled floor cutter is the number of wheels, and therefore, the above description of a four-wheeled floor cutter can also be applied to a three-wheeled floor cutter.

[0115] Figure 8 This is a view showing the power motor (hydraulic motor / electric motor) installed in the ground cutter according to the invention.

[0116] Figure 8 (a) shows a power motor (hydraulic motor or electric motor) 220 directly connected to a drive wheel, and Figure 8 (b) shows that the vertical reducer 170 is respectively disposed between the power motor 220 and the power wheel.

[0117] When the ground cutting machine according to the present invention is a four-wheel ground cutting machine, the drive wheel can be the rear wheel 110. When the ground cutting machine according to the present invention is a three-wheel ground cutting machine, the drive wheel can be the rear wheel 110'.

[0118] The driving force can be applied to the rear wheels 110 or 110' via the power motor 220. For example, when the power motor 220 rotates once with the diameter of the rear wheels 110 or 110' being approximately 15 cm, the rear wheels 110 or 110' rotate once. In this case, the ground cutter moves approximately 50 cm (3.14 × 15 cm).

[0119] In order for the ground cutter to cut iron reinforcement bars or concrete, the power motor 220 must be driven at a high speed; however, the ground cutter must move very slowly. In many cases, the ground cutter cannot move more than 20 cm per minute. Therefore, if the power motor 220 is directly connected to the rear wheels 110 or 110', the accuracy and safety of the ground cutter may be reduced. Furthermore, the power motor 220 must rotate at least 15 to 20 revolutions per minute to generate effective power. Therefore, as... Figure 8 As shown in (a), problems may occur if the power motor is directly connected to the drive wheel.

[0120] Specifically, in conventional floor cutters, when the power motor 220 is driven and the floor cutter appears to be moving excessively forward, the operator manually controls the movement of the floor cutter. In this situation, the operator needs to exert more effort and cannot achieve accurate control. In the floor cutter according to the invention, a reducer 170 is connected between the power motor 220 and the rear wheel 110 or 110'. In the floor cutter according to the invention, a wireless controller (e.g., a wireless remote controller) is configured to wirelessly control the power motor 220 and the reducer 170, thereby enabling accurate control of the cutting operation.

[0121] In other words, in the ground cutter according to the invention, the power motor 220 and the rear wheels 110 or 110' are connected to each other via a reducer 170. While the power motor 220 is driven at high speed (or high output) under the control of the reducer 170, control can be performed to make the ground cutter move slowly forward to cut the ground. For example, when the reducer 170 is set to have a reduction ratio of 30:1, the rear wheels 110 or 110' rotate once for every 30 rotations of the power motor 220, and thus the movement of the ground cutter can be accurately controlled.

[0122] Furthermore, when the ground cutter according to the invention performs ground cutting work on a slope, the ground cutting work on the slope can be easily performed using the reducer 170. Since the power motor 220 does not have a braking function, the ground cutter still moves downhill along the slope even when the power motor 220 is not driven. However, when the reducer 170 is provided, the reducer 170 performs a braking function, thereby controlling the ground cutter, and therefore, the work on the slope can be easily performed. Therefore, the ground cutting work can be accurately controlled. In particular, for a three-wheeled ground cutter, the rear wheel 110' is rotatable, thereby also allowing for directional control. Therefore, when the reducer 170 is also provided, the direction and forward speed of the ground cutter can be accurately adjusted.

[0123] Most current floor cutters are four-wheel floor cutters. When using a three-wheel floor cutter, it is easier to change direction in narrower spaces and can be done more quickly.

[0124] The above-mentioned components are represented by the following reference numerals.

[0125] 100: Main frame, 110: Rear wheel, 120: Front wheel, 130: Shielding cover, 131: Support frame, 140: Front frame, 150: Second dust hood fixing pin, 160: First dust hood fixing pin, 170: Reducer, 200: Cutting frame, 210: Hinge part, 220: Power motor, 230: Cutting shaft, S: First hydraulic cylinder, 300: Cutting blade, 400: Auxiliary wheel, 410: Second hydraulic cylinder, 500: Dust hood, 510: Dust collection port, 520: First support, 530: Second support, 540: Third support, 550: Wire, 560: Operating lever, 570: Hole, 580: Rubber cover, and 590: Wheel.

[0126] The above embodiments are combinations of elements and features of the present invention. Unless otherwise stated, elements or features may be considered optional. Each element or feature may be practiced without combination with other elements or features. Furthermore, embodiments of the present invention can be constructed by combining some elements and / or features. The order of operations described in the embodiments of the present invention may be changed. Some elements or features of any embodiment may be included in another embodiment or may be replaced by corresponding elements or features of another embodiment. It will be apparent to those skilled in the art that claims not expressly referenced in the appended claims may be presented as embodiments of the present invention in combination, or may be included as new claims after filing by subsequent amendments.

[0127] It will be apparent to those skilled in the art that the invention may be practiced in specific forms other than those set forth herein without departing from its spirit and essential characteristics. Therefore, the above detailed description should be construed as illustrative rather than restrictive in all respects. The scope of the invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of its equivalents are included within the scope of the invention.

[0128] Industrial applications

[0129] The ground cutting machine according to the present invention can be industrially applied to cutting during road construction, demolition of structures, such as the demolition of concrete structures, etc.

Claims

1. A floor cutting machine, comprising: The main frame is configured to support the equipment required for cutting the ground; Multiple front wheels, assuming the ground cutter's forward direction is forward and the opposite direction is backward, the multiple front wheels are located on the opposite side of the front of the main frame; At least one rear wheel, said at least one rear wheel being located at the rear of the main frame; A cutting frame, which is a frame separate from the main frame, wherein one side of the cutting frame is fixed to the vicinity of the rear of the main frame, and the other side of the cutting frame is configured to move upward and downward; A cutting blade, which is mounted on the opposite side of a cutting shaft located near the other side of the cutting frame; A dust collection hood with a rubber cover attached to its lower end; The rubber cover is used to collect waste generated during the ground cutting operation, and the rubber cover is in contact with the ground during the ground cutting operation; The upper end of the dust collection hood is fixed to the wire, and the other side of the wire is fixed to the wire operating unit so that the dust collection hood can move up and down through the wire operating unit; The dust collection hood further includes: A hole located on one side of the dust collection hood, within which the central portion of the cutting blade moves up and down, and Multiple rubber brushes are provided to cover the holes, preventing waste generated by the cutting blade during cutting from being discharged outside the dust collection hood. The auxiliary wheel is positioned further forward than the at least one rear wheel, wherein Assume that the auxiliary wheel moves upward and downward via a second hydraulic cylinder located at the upper end of the auxiliary wheel. When the auxiliary wheels are in the upper position, the ground cutter is supported on the ground by the plurality of front wheels and the plurality of rear wheels, thereby operating the ground cutter in a four-wheel drive mode. When the auxiliary wheels are positioned below, at least one rear wheel is not in contact with the ground, and the ground cutter is supported on the ground by the plurality of front wheels and the plurality of auxiliary wheels, thus the ground cutter also operates in a four-wheel drive mode. The auxiliary wheel is rotatable, thereby allowing the direction of the auxiliary wheel to be adjusted.

2. The ground cutting machine according to claim 1, wherein, One side of the cutting frame is hinged to the vicinity of the rear of the main frame, and The ground cutting machine also includes a first hydraulic cylinder connected between the main frame and the cutting frame, the first hydraulic cylinder being configured to move the other side of the cutting frame upward and downward.

3. The ground cutting machine according to claim 2, wherein, The first hydraulic cylinder is operated by a worker to move the other side of the cutting frame up and down, and to move the cutting blade located near the other side of the cutting frame up and down.

4. The ground cutting machine according to claim 1, When the number of rear wheels is one, The ground cutter also includes a direction adjustment cylinder connected to the rear wheel, the direction adjustment cylinder being configured to adjust the rotation or direction of the rear wheel.

5. The ground cutting machine according to claim 4, further comprising: A power motor configured to provide power to the ground cutter; as well as A speed reducer is connected between the power motor and the rear wheel, and the speed reducer is configured to control the forward movement of the ground cutter.

6. The ground cutting machine according to claim 1, further comprising: A power motor and a reducer are located at the upper end of the cutting frame, wherein, The shielding cover is supported by multiple support frames connected to the main frame, and The shield is configured to protect the power motor and the reducer.

7. The ground cutting machine according to claim 1, wherein, Each of the cutting blades has an annular cross-section, and The annular shape has recesses at predetermined intervals on its outer periphery, which are configured to cut the ground surface.

8. The ground cutting machine according to claim 5 further includes a wireless controller configured to wirelessly control the power motor and the reducer.

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