Angle-adjustable sawing machine

Abstract

This invention discloses an angle-adjustable sawing machine tool, comprising a machine tool body, a linkage mechanism, and a locking mechanism. The machine tool body has a worktable, a machining module, and a swing arm pivotally connected to the worktable and the machining module. The linkage mechanism is pivotally connected to the machine tool body and includes a first link, a second link pivotally connected to the first link, a third link pivotally connected to the second link, and a fourth link pivotally connected to the third link. The locking mechanism is connected to the swing arm of the machine tool body to restrict the position of the swing arm. Therefore, the linkage mechanism can adjust the angle of the machining module according to the position of the swing arm of the machine tool body, allowing the machining module to saw the workpiece at the correct cutting position.

Description

Technical Field

[0001] This invention relates to a sawing machine tool, and more particularly to an angle-adjustable sawing machine tool that utilizes a linkage mechanism to achieve multiple degrees of freedom of movement, and can adjust the angle of the processing module of the sawing machine tool to perform sawing operations at the optimal cutting position. Prior Technology

[0002] Note that sawing tools are widely used power tools. Depending on the speed and the saw blade, they can be used to cut stone, tiles, wood, or metal. Portable handheld circular saws or cutting machines are also available, allowing users to process materials directly on-site. When cutting metal with a cutting machine, in addition to selecting the appropriate saw blade based on the material thickness, it is crucial to cut from the correct position. It is generally recommended to cut from the edge of the workpiece to minimize the contact area between the saw blade and the workpiece, thus facilitating the saw blade's entry into the workpiece.

[0003] Because the workpieces come in various shapes and sizes, it is necessary to adjust the cutting head of the sawing machine so that the saw blade's downward cutting position corresponds to the edge of the workpiece. Chinese Patent Publication No. 2822845 Y discloses a circular saw machine, which includes a base, a rotating arm, a saw blade, a protective cover, and a connecting rod. The sliding table of the base can move along a sliding shaft, while the rotating arm can drive the connecting rod to deflect downwards. The connecting rod uses the second section of its top and support portion as a fulcrum, thereby pulling the protective cover to rotate relative to the rotating arm. The positioning portion of the sliding table then moves along a guide groove, causing the protective cover to flip. Chinese Patent Publication No. 210387782 U includes a worktable, a machine head, a sliding rod support, and a sliding rod. The sliding rod can slide along the sliding rod support to adjust the position of the machine head. This mechanism can change the cutting height and cutting width of the machine head to accommodate cutting workpieces of different sizes.

[0004] However, when the sliding table or machine head is adjusted to the rear, the sliding shaft or slide bar will protrude to the rear of the entire machine. It can be seen that this mechanism design requires a large working space and cannot be used against a wall. When the sliding table or machine is in the front, the weight of the entire sawing module will be concentrated in the front, and the center of gravity of the machine will shift forward, causing the cutting operation to be prone to shaking.

[0005] Therefore, the inventors considered how to provide a sawing machine with an adjustable cutting position that does not require too much workspace, making it more suitable for use on the processing site. Summary of the Invention

[0006] Given the numerous shortcomings of existing sawing machines, the main objective of this invention is to provide an angle-adjustable sawing machine that allows for fine-tuning of the processing module's angle through a linkage mechanism. This enables the machine to find the optimal cutting position when sawing workpieces of various sizes and shapes, thus facilitating sawing.

[0007] To achieve the aforementioned main objectives, the present invention provides a sawing machine tool, comprising a machine tool body, a linkage mechanism, and a locking mechanism. The machine tool body has a worktable, a machining module, and a swing arm pivotally connected to the worktable and the machining module. The linkage mechanism is pivotally connected to the machine tool body and includes a first link, a second link pivotally connected to the first link, a third link pivotally connected to the second link, and a fourth link pivotally connected to the third link. The linkage mechanism adjusts the angle of the machining module according to the position of the swing arm of the machine tool body. The locking mechanism is connected to the swing arm of the machine tool body to restrict the position of the swing arm.

[0008] With the above technical features, when it is necessary to adjust the position and angle of the processing module, the user can release the locking mechanism from the swing arm to adjust the processing module. The swing arm can provide a wide range of adjustment, while the combination of multiple links in the linkage mechanism can perform a small range of adjustment. In this way, the processing module can achieve multi-angle adjustment, and the linkage mechanism is small in size, so it does not need to occupy too much working space to change the position and angle of the processing module. When the processing module is adjusted, the locking mechanism is used to lock the swing arm, and the position of the swing arm is fixed. The linkage mechanism also remains in the adjusted position, preventing the position of the processing module from shifting during sawing operations.

[0009] Preferably, the machining module of the machine tool body includes a housing, a motor disposed within the housing, a saw blade connected to the motor, a saw blade guard fixed to the housing, and a handle fixed to the housing. Thus, the machining module is operated by the user holding the handle to perform sawing operations, with the motor driving the saw blade to rotate.

[0010] Preferably, one end of the swing arm of the machine tool body is pivotally connected to the worktable via a lower pivot, and the other end is pivotally connected to the machining module and the second link of the linkage mechanism via an upper pivot. In this way, the swing arm can drive the machining module to move forward or backward via the lower pivot, and the machining module can be deflected downward relative to the swing arm via the upper pivot to perform sawing operations.

[0011] Preferably, one end of the first link of the linkage mechanism has a first guide groove, and the first link passes through the first guide groove via a pin to connect to the machining module of the machine tool body. The other end of the first link is pivotally connected to the second link. In this way, when the first link is actuated, it can drive the machining module, allowing the machining module to make fine adjustments to its angle due to the movement of the linkage mechanism.

[0012] Preferably, one end of the second link of the linkage mechanism has a second guide groove. The second link passes through the second guide groove via a pin to connect to the machining module of the machine tool body. The other end of the second link is pivotally connected to the first link, and the second link is pivotally connected to one end of the swing arm of the machine tool body between its two ends. In this way, when the swing arm moves, the second link will drive the other links to move together. When the swing arm is locked by the locking mechanism, the linkage mechanism cannot move to fix the angle of the machining module. When the machining module performs a sawing operation, the second guide groove can restrict the downward flipping path of the machining module.

[0013] Preferably, one end of the third link of the linkage mechanism is pivotally connected between the two ends of the second link, and the other end is pivotally connected to the fourth link. In this way, the third link acts as a parallel plate, parallel to the swing arm, and deflects back and forth with the swing arm to drive the other links to perform multi-angle adjustments.

[0014] Preferably, one end of the fourth link of the linkage mechanism is pivotally connected to the third link, while the other end is fixed to the worktable of the machine tool body. In this way, the third link can deflect relative to the fourth link, and one end of the linkage mechanism is fixed to the worktable. This not only securely fixes the linkage mechanism, but also allows the machining module to be easily adjusted to the ideal position by driving the machining module through the other end of the linkage mechanism.

[0015] Preferably, the locking mechanism has a fixed plate and a positioning member. One end of the fixed plate is fixed to the worktable of the machine tool body, and the other end is provided with a positioning groove. The positioning member passes through the positioning groove and is fixed to the swing arm of the machine tool body. The swing arm moves along the positioning groove through the positioning member. When the position of the positioning member is fixed in the positioning groove, the position of the swing arm of the machine tool body is restricted. In this way, the positioning member and the swing arm are linked. When the positioning member is fixed, the swing arm is also fixed and cannot move.

[0016] Preferably, the positioning groove of the fixed plate has a plurality of positioning holes. The positioning element has a positioning button that passes through the positioning groove and the swing arm of the machine tool body, a positioning spring fixed to the positioning button, and a positioning ring that sets the positioning button and the positioning spring. The positioning ring passes through the positioning hole detachably through the positioning spring. In this way, the user can pull the positioning ring outward to release the locking mechanism from the swing arm, and the swing arm is in an operable state. When the positioning ring moves to another positioning hole, the positioning spring will rebound and push the positioning ring, allowing the positioning ring to be locked in the positioning groove through the positioning hole.

[0017] Detailed descriptions of the construction, features, assembly, and use of the sawing machine provided by this invention will be provided in the subsequent detailed description of the embodiments. However, those skilled in the art will understand that such detailed descriptions and the specific embodiments listed for implementing this invention are merely illustrative and not intended to limit the scope of the patent application. Simple Explanation of the Diagram

[0018] Figure 1 is a perspective view of the present invention; Figure 2 is a perspective view of the present invention, showing another perspective of Figure 1; Figure 3 is an exploded perspective view of the present invention; Figure 4 is an exploded perspective view of the saw blade guard of the present invention, showing the combined position with the covering element; Figure 5 is an exploded perspective view of the linkage mechanism of the present invention; Figure 6 is an exploded perspective view of the locking mechanism of the present invention; Figure 7 is a schematic diagram of the operation of the present invention, showing the state of the second position; Figure 8 is a schematic diagram of the operation of the present invention, showing another perspective of Figure 7; Figure 9 is a schematic diagram of the operation of the present invention, showing the state in the third position; Figure 10 is a schematic diagram of the operation of the present invention, showing another perspective of Figure 9; Figure 11 is a schematic diagram of the sawing process of the present invention, showing the action of the saw blade guard flipping; Figure 12 is a partial enlarged view of the present invention, showing the covering element shielding the spindle screw; Figure 13 is a partially enlarged view of the present invention, showing the positional relationship between the covering element and the movable shield; and Figure 14 is a schematic diagram of the saw blade replacement of the present invention, showing the positional relationship of each component. Implementation

[0019] The applicant first clarifies that in the embodiments and drawings described below, the same reference numerals denote the same or similar elements or their structural features. It should be noted that the elements and structures in the drawings are for illustrative purposes and are not drawn to scale or in quantity; and features of different embodiments may be used interchangeably if feasible in practice. Secondly, when it is stated that an element is disposed on another element, it means that the aforementioned element is directly disposed on the other element, or that the aforementioned element is indirectly disposed on the other element; that is, one or more other elements are disposed between the two elements. Conversely, when it is stated that an element is "directly" disposed on another element, it means that no other elements are disposed between the two elements.

[0020] Please refer to Figures 1 to 6. The angle-adjustable sawing machine 10 of the present invention mainly includes a machine body 20, a linkage mechanism 30 and a locking mechanism 40.

[0021] The machine tool body 20 has a worktable 21, a machining module 22, and a swing arm 23. The swing arm 23 has an H-shaped structure, with its bottom end pivotally connected to the worktable 21 via a lower pivot 231, and its top end pivotally connected to the machining module 22 via an upper pivot 232. The machining module 22 includes a housing 221, a motor 222 disposed within the housing 221, a saw blade 223 connected to the motor 222 via a spindle screw 2221, a saw blade guard 224 fixed to the housing 221, and a handle 225 fixed to the housing 221.

[0022] The saw blade guard 224 is divided into a fixed guard 226, a movable guard 227 and an elastic member 228. The two ends of the elastic member 228 are respectively set on the fixed guard 226 and the movable guard 227. When no processing operation is performed, the fixed guard 226 and the movable guard 227 together cover the saw blade 223 to prevent the user from accidentally touching the saw blade 223 and getting injured. When processing operation is performed, the processing module 22 will flip downward relative to the swing arm 23, and the movable guard 227 will flip upward through the tension of the elastic member 228, while the fixed guard 226 remains stationary. The fixed cover 226 also has a connecting plate 2261 and a third guide groove 2262 formed on the connecting plate 2261. The connecting plate 2261 is fixed to the fixed cover 226 through two pins 2263. The inner side of the movable cover 227 also has a connecting part 2271, a connecting hole 2272 provided in the center of the connecting part 2271, and at least one pushing part 2273 formed on the connecting part 2271. The movable cover 227 passes through the connecting hole 2272 through a pin 229 to pivotally connect to the fixed cover 226.

[0023] The linkage mechanism 30 is pivotally connected to one side of the machine tool body 20. The linkage mechanism 30 has a first link 31, a second link 32, a third link 33, and a fourth link 34. One end of the first link 31 has a first guide groove 311, which is elongated. The first link 31 passes through the first guide groove 311 through a pin 35 to connect to the movable cover 227 of the machining module 22. The other end of the first link 31 is pivotally connected to the second link 32. The end of the second link 32 that is not connected to the first link 31 has a second guide groove 321, which is arc-shaped. The second link 32 passes through the second guide groove 321 through a pin 36 to connect to the housing 221 of the machining module 22 of the machine tool body 20. One end of the swing arm 23 of the machine tool body 20 is also pivotally connected to the two ends of the second link 32 via a pivot 232. One end of the third link 33 is pivotally connected between the two ends of the second link 32. This connection position is adjacent to the connection position between the second link 32 and the swing arm 23. The third link 33 is parallel to the swing arm 23. The other end of the third link 33 is pivotally connected to the fourth link 34. The end of the fourth link 34 that is not connected to the third link 33 is fixed to the worktable 21 of the machine tool body 20. The bottom end of the fourth link 34 is locked to the worktable 21 by screws 37.

[0024] The relative positions of the swing arm 23 and the second link 32, the third link 33 and the fourth link 34 form a quadrilateral shape. Through the movement of the linkage mechanism 30, multiple angular position combinations can be made, allowing the processing module 22 to be adjusted to multiple positions.

[0025] The locking mechanism 40 is connected to the swing arm 23 of the machine tool body 20 to limit the position of the swing arm 23. The locking mechanism 40 has a fixing plate 41 and a positioning member 42. The bottom end of the fixing plate 41 is fixed to the worktable 21 of the machine tool body 20 with screws 43, and the top end has a positioning groove 411 and a plurality of positioning holes 412 formed in the positioning groove 411. The positioning member 42 has a positioning button 421 that passes through the positioning groove 411 and the swing arm 23 of the machine tool body 20, a positioning spring 422 fixed to the positioning button 421, and a positioning ring 423 that sets the front end of the positioning button 421 and the positioning spring 422. The front end is designed as a tapered flange. The positioning button 421 passes through the positioning groove 411 and is fixed to the swing arm 23 of the machine tool body 20, so that the front end of the positioning ring 423 can be engaged in the positioning hole 412. The position of the positioning member 42 is fixed in the positioning groove 411 to limit the position of the swing arm 23 of the machine tool body 20. When the positioning ring 423 of the positioning member 42 is pulled, the front end of the positioning ring 423 can be separated from the positioning hole 412 through the positioning spring 422, so that the swing arm 23 can be displaced along the positioning groove 411 through the positioning member 42.

[0026] Please refer to Figures 1, 2, 7 to 10. This embodiment provides three implementation states, showing the position and angle at which the machining module 22 of the machine tool body 20 is positioned when the locking mechanism 40 is in three locking positions.

[0027] When the locking mechanism 40 is in the first position P1, the positioning member 42 is located in the positioning hole 412 in the middle of the positioning groove 411 of the fixed plate 41, and the swing arm 23 of the machine tool body 20 and the third connecting rod 33 are perpendicular to the ground. Thus, the processing module 22, which is pivotally connected to the top of the swing arm 23, is in a slightly forward tilted state.

[0028] To adjust the processing module 22 from the first position P1 to the second position P2 or the third position P3, the user must pull the positioning ring 423 of the positioning member 42 outward. A positioning spring 422 is installed inside the positioning ring 423, and one end of the positioning spring 422 is fixed to the positioning button 421. When the positioning ring 423 is pulled outward, it resists the tension of the positioning spring 422, causing the positioning spring 422 to compress around the end fixed to the positioning button 421. The front end of the positioning ring 423 can then separate from the positioning hole 412. At this time, the positioning member 42 can move along... The positioning groove 411 slides, and the swing arm 23 and the linkage mechanism 30 are in a movable state, allowing the user to hold the handle 225 of the processing module 22 and the housing 221 to adjust the position. As the position of the processing module 22 changes, the swing arm 23 will move forward or backward along the positioning groove 411, and at the same time drive the linkage mechanism 30 to move. Since the second linkage 32 is pivotally connected to the swing arm 23, the processing module 22 can also produce a slight upward or downward movement through the design of the second linkage 32 pivoting relative to the swing arm 23, so that the saw blade 223 can be finely adjusted to a suitable position. When the adjustment is completed, the positioning member 42 will correspond exactly to the position of the positioning hole 412 in the second position P2 or the third position P3. The positioning spring 422 will rebound due to its tension and push the positioning ring 423, so that the front end of the positioning ring 423 is engaged in the positioning hole 412 to fix the position of the swing arm 23.

[0029] When the locking mechanism 40 is in the second position P2, the positioning member 42 is located in the positioning hole 412 on the front side of the positioning groove 411 of the fixed plate 41. The swing arm 23 of the machine tool body 20 and the third connecting rod 33 are tilted forward. Thus, the processing module 22 pivotally connected to the top of the swing arm 23 is tilted forward more than in the first position P1. As a result, the position of the saw blade 223 is further forward, making the cutting position farther away from the swing arm 23.

[0030] When the locking mechanism 40 is in the third position P3, the positioning member 42 is located in the positioning hole 412 behind the positioning groove 411 of the fixed plate 41. The swing arm 23 and the third connecting rod 33 of the machine tool body 20 tilt backward. As a result, the processing module 22, which is pivotally connected to the top of the swing arm 23, tilts backward more than in the first position P1. Therefore, the position of the saw blade 223 is further back, so that the cutting position is closer to the swing arm 23.

[0031] Please refer to Figure 11 again. During the actual sawing operation, the workpiece is placed on the workbench 21 and clamped and fixed. The user first adjusts the position and angle of the processing module 22 according to the edge position of the workpiece, and then starts the motor 222 of the processing module 22. The saw blade 223 starts to rotate due to the drive of the motor 222. At this time, the user holds the handle 225 and applies force to press down. The first link 31 of the linkage mechanism 30 is driven to deflect downward. The position of the swing arm 23 is restricted by the positioning member 42. Therefore, the processing module 22 will rotate through the upper rotating shaft 232, while the swing arm 23 remains stationary. The processing module 22 rotates downward along the shape of the second guide groove 321, so that the processing module 22 performs sawing operations through the designed path to accurately cut the workpiece. During the downward flipping of the processing module 22, the elastic element 228 of the saw blade guard 224 will automatically flip the movable guard 227 upward due to the downward flipping force. Therefore, when the saw blade 223 approaches the workpiece, the saw blade 223 will be exposed to contact the workpiece.

[0032] Furthermore, the present invention also provides instructions for replacing the saw blade 223. Please refer to Figures 12 to 14. The sawing machine tool 10 also includes a cover element 60, which is used to cover the spindle screw 2221 of the saw blade 223 of the fixed processing module 22 to prevent the spindle screw 2221 from being disassembled at will. Figure 12 shows the cover element 60 with the movable cover 227 hidden. The cover element 60 has a protrusion 61 and a connecting hole 62 that passes through both sides of the cover element 60. It passes through the third guide groove 2262 of the fixed cover 226 through the protrusion 61 and abuts against the push part 2273 on the inner side of the movable cover 227. Then, a pin 63 passes through the third guide groove 2262 of the fixed cover 226 and the connecting hole 62 of the cover element 60. Figure 13 is a view of the inner side of the movable cover 227. The fixed cover 226 is hidden in order to clearly show the relative relationship between the cover element 60 and the movable cover 227.

[0033] When the saw blade 223 needs to be replaced, the user manually raises the movable cover 227 to a certain position, and then continues to apply force to flip the movable cover 227 upward and move it backward at the same time. As the movable cover 227 moves backward, the pin 35 connecting the movable cover 227 and the first connecting rod 31 will move along one end of the first guide groove 311 to the other end. At this time, the protrusion 61 of the cover element 60 is pushed by the push part 2273 of the movable cover 227, and the cover element 60 moves along the third guide groove 2262 through the pin 63 (as shown in Figure 14), exposing the spindle screw 2221. The user can then use tools to remove the spindle screw 2221 and replace the saw blade 223.

[0034] In summary, the angle-adjustable sawing machine 10 provided by the present invention has at least the following advantages compared with the prior art:

[0035] 1. The sawing machine 10 of the present invention, through the configuration of multiple links of the linkage mechanism 30 and the swing arm 23, can be matched with multiple angle combinations, so that the processing module 22 can be adjusted to multiple positions to find the most suitable cutting position for each workpiece, thereby reducing the wear of the saw blade 223.

[0036] 2. The sawing machine tool 10 of the present invention provides the function of adjusting and fixing the position of the processing module 22 by a locking mechanism. When the position and angle of the processing module 22 are determined, the locking mechanism can restrict the position of the swing arm 23 of the machine tool body 20, so as to avoid the position of the processing module 22 being offset when the sawing machine tool 10 performs sawing operations, thereby improving stability and accuracy.

[0037] Finally, it must be stated again that the constituent elements disclosed in the foregoing embodiments of the present invention are merely illustrative examples and are not intended to limit the scope of this application. Substitutions or variations of other equivalent elements should also be covered by the scope of the patent application in this application.

[0038] 10: Sawing Machine 20: Machine tool body 21: Workbench 22: Processing Module 221: Chassis 222: Motor 2221: Spindle screw 223: Saw Blade 224: Saw Blade Protector 225: Handle 226: Fixed Protective Cover 2261: Connecting plate 2262: Third guide groove 2263: Pin 227: Active protective cover 2271: Connecting part 2272: Connecting hole 2273: Pushing Department 228: Elastic component 229: Pin 23: Arm Swing 231: Lower shaft 232: Upper pivot 30: Linkage Mechanism 31: First Link 311: First guide groove 32: Second Link 321: Second guide groove 33: Third Link 34: Fourth Link 35: Pin 36: Pin 37: Screws 40: Locking mechanism 41: Fixing plate 411: Positioning groove 412: Positioning hole 42: Positioning component 421: Positioning button 422: Positioning Spring 423: Positioning ring 43: Screws 60: Covering element 61: Bump 62: Connecting hole 63: Pin P1: First position P2: Second position P3: Third position

Claims

1. A sawing machine tool, comprising: a machine tool body having a worktable, a machining module, and a swing arm pivotally connected to the worktable and the machining module, the pivot structure of the swing arm pivotally connecting the worktable and the machining module being perpendicular to both sides of the swing arm; a linkage mechanism pivotally connected to the machine tool body, the linkage mechanism having a first link, a second link pivotally connected to the first link, a third link pivotally connected to the second link, and a fourth link pivotally connected to the third link, the linkage mechanism adjusting the angle of the machining module according to the position of the swing arm of the machine tool body; and a locking mechanism connected to the swing arm of the machine tool body to restrict the position of the swing arm of the machine tool body; wherein... One end of the first link of the linkage mechanism is connected to the machining module of the machine tool body, and the second link is connected to the swing arm of the machine tool body; one end of the third link of the linkage mechanism is pivotally connected between the two ends of the second link, and the other end is pivotally connected to the fourth link; one end of the fourth link of the linkage mechanism is pivotally connected to the third link, and the other end is fixed to the worktable of the machine tool body.

2. The sawing machine tool as claimed in claim 1, wherein the processing module of the machine tool body includes a housing, a motor disposed within the housing, a saw blade connected to the motor, a saw blade guard fixed to the housing, and a handle fixed to the housing.

3. The sawing machine tool as described in claim 1, wherein one end of the swing arm of the machine tool body is pivotally connected to the worktable via a lower pivot, and the other end is pivotally connected to the processing module and the second link of the linkage mechanism via an upper pivot, wherein the lower pivot and the upper pivot constitute the pivot structure.

4. The sawing machine tool as claimed in claim 1, wherein one end of the first link of the linkage mechanism has a first guide groove, the first link passes through the first guide groove via a pin to connect to the processing module of the machine tool body, and the other end of the first link is pivotally connected to the second link.

5. The sawing machine tool as claimed in claim 1, wherein one end of the second link of the linkage mechanism has a second guide groove, the second link passes through the second guide groove via a pin to connect to the processing module of the machine tool body, the other end of the second link is pivotally connected to the first link, and the second link is pivotally connected between the two ends to one end of the swing arm of the machine tool body.

6. The sawing machine as claimed in claim 1, wherein the locking mechanism has a fixed plate and a positioning member, one end of the fixed plate is fixed to the worktable of the machine body, and the other end is provided with a positioning groove, the positioning member passes through the positioning groove and is fixed to the swing arm of the machine body, the swing arm moves along the positioning groove through the positioning member, and when the position of the positioning member is fixed in the positioning groove, the position of the swing arm of the machine body is restricted.

7. The sawing machine as claimed in claim 6, wherein the positioning groove of the fixed plate is formed with a plurality of positioning holes, the positioning member has a positioning button passing through the positioning groove and the swing arm of the machine body, a positioning spring fixed to the positioning button, and a positioning ring fitting the positioning button and the positioning spring, the positioning ring being detachably passed through the positioning hole via the positioning spring.

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