A ring saw

Abstract

The utility model relates to a ring saw, including a saw blade positioning mechanism, an annular saw blade and a driving mechanism, wherein the annular saw blade is installed in the saw blade positioning mechanism, the output end of the driving mechanism is connected to a driving wheel, the inner ring surface of the annular saw blade is pressed against the driving wheel, the saw blade positioning mechanism includes a protective cover and an adjusting device, the protective cover is provided with a receiving groove for installing the adjusting device, the adjusting device includes a positioning screw, an elastic component, a pressure sensor and an adjusting screw, the adjusting screw includes a screwing portion and a screw portion, a first spring is sleeved on the screw portion, the two ends of the first spring are respectively in contact with the screwing portion and the protective cover, and a pressure display device connected to the pressure sensor is provided on the protective cover. The utility model can make the adjusting screw drive the protective cover to move toward or away from the driving wheel by screwing the screwing portion, and can display the degree of pressure between the annular saw blade and the driving wheel through the pressure display device, so as to know whether the annular saw blade is installed in place with the driving wheel, and is very convenient to use and install.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a ring saw. Background Art

[0002] The existing authorization announcement number "CN206254338U" discloses a ring saw machine including a driving source, a ring saw blade and a driving wheel, the ring saw blade having a first side surface and a second side surface opposite to the first side surface, the first side surface having a positioning ring groove, the driving wheel is connected to the driving source and is clamped on the inner ring surface of the ring saw blade, and the saw blade positioning mechanism includes: a protective cover, which is movably arranged on the outer peripheral surface of the driving source along the radial direction of the ring saw blade and covers a part of the ring saw blade; two first driven wheels, which are rotatably arranged on the protective cover and located on two opposite sides of the driving wheel, and are clamped in the positioning ring groove of the first side surface of the ring saw blade; two second driven wheels, which are rotatably arranged on the protective cover and located on two opposite sides of the driving wheel, and abut against the second side surface of the ring saw blade; and an adjustment component, which is arranged on the protective cover, for driving the protective cover to move relative to the ring saw blade along the radial direction of the ring saw blade. However, due to the imperfect design of the adjustment component in the prior art, it is impossible to know whether the annular saw blade is installed in place after the annular saw blade is installed, and the adjustment component needs to be adjusted multiple times when installing the annular saw blade, which is very troublesome. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide a ring saw which is convenient for adjustment and installation.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A ring saw comprises a saw blade positioning mechanism, an annular saw blade and a driving mechanism, wherein the annular saw blade is installed in the saw blade positioning mechanism, the output end of the driving mechanism is connected to a driving wheel, the inner ring surface of the annular saw blade is pressed against the driving wheel, the saw blade positioning mechanism comprises a protective cover and an adjusting device, the protective cover is movably arranged on one side of the driving mechanism and covers a part of the annular saw blade, the protective cover is provided with a receiving groove for installing the adjusting device, the adjusting device comprises a positioning screw, an elastic component, a pressure sensor and an adjusting screw, one end of the positioning screw passes through the groove wall of the receiving groove and is fixed to the driving mechanism, the pressure sensor is sleeved on the positioning screw, and one end of the elastic component is connected to the pressure sensor The adjusting screw comprises a screwing portion and a screw portion, one end of the screw portion is threadedly connected to the positioning screw and abuts against the pressure sensor, and the other end of the screw portion is connected to the screwing portion, and a first spring is also sleeved on the screw portion, one end of the first spring abuts against the screwing portion, and the other end of the first spring abuts against the protective cover, and a pressure display device connected to the pressure sensor is also provided on the protective cover, and screwing the screwing portion can make the adjusting screw drive the protective cover to move toward or away from the driving wheel, thereby adjusting the degree of pressure between the inner ring surface of the annular saw blade and the driving wheel, and the pressure display device is used to display the degree of pressure.

[0006] Furthermore, the upper cover of the accommodating groove is provided with a fixing plate, and a through hole is set on the fixing plate. One end of the screw rod part passes through the through hole and is screwed to the positioning screw and the end part abuts against the pressure sensor, one end of the first spring abuts against the screwing part, and the other end of the first spring abuts against the fixing plate, and the pressure display device is installed on the fixing plate.

[0007] Furthermore, the pressure display device includes an outer shell, a circuit board, a display screen and a lithium battery. The display screen is arranged on the circuit board and installed in the outer shell, and the display screen displays the degree of pressure between the inner ring surface of the annular saw blade and the driving wheel in a numerical display manner. The lithium battery is arranged in the outer shell and electrically connected to the circuit board.

[0008] Further, the elastic component includes two second springs and two positioning columns, the two positioning columns are respectively located at the two ends of the pressure sensor, and one end of the two positioning columns is connected to the groove wall of the accommodating groove, and the other ends of the two positioning columns are passed through the mounting holes set on the pressure sensor, and the pressure sensor can slide up and down along the two positioning columns, and the two second springs are respectively mounted on the two positioning columns, and one end of the two second springs abuts against the pressure sensor, and the other ends of the two second springs abuts against the groove wall of the accommodating groove.

[0009] Furthermore, the driving mechanism includes a head located at the front end, a body located in the middle and a handle located at the rear end, a transmission device is arranged in the head, a driving motor is arranged in the body, one end of the transmission device is connected to the driving wheel, and the other end of the transmission device is connected to the driving motor.

[0010] Furthermore, the protective cover has a driving wheel groove and two guide rod holes, the driving wheel groove is used to accommodate the driving wheel, the two guide rod holes are located on two opposite sides of the driving wheel groove, guide rods are installed in the two guide rod holes, the protective cover is displaceably mounted on a guide rod through the two guide rod holes, and a mounting seat for fixing the two guide rods is provided on the machine head.

[0011] Furthermore, the positioning mechanism also includes two first driven wheels and two second driven wheels, the two first driven wheels are rotatably arranged on the protective cover and are located on two opposite sides of the driving wheel, one side of the annular saw blade is provided with a first side surface, and the other side of the annular saw blade is provided with a second side surface, the first side surface is provided with a positioning ring groove, the two first driven wheels are clamped in the positioning ring groove of the first side surface, and the two second driven wheels are rotatably placed on the protective cover and are located on two opposite sides of the driving wheel, and abut against the second side surface.

[0012] Furthermore, the central axis of the grip portion on the handle is in the same straight line as the center point of the annular saw blade.

[0013] Furthermore, a gyroscope is provided in the handle, and the gyroscope is electrically connected to the drive motor and can detect the situation that the ring saw falls or has a large position deflection, and cut off the output of the drive motor in time.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model provides a ring saw, which can drive the protective cover to move towards or away from the driving wheel by rotating the rotating part, thereby adjusting the degree of pressure between the inner ring surface of the ring saw blade and the driving wheel, and can display the degree of pressure between the ring saw blade and the driving wheel in a numerical manner through a pressure display device, so as to judge whether the ring saw blade is installed in place, and is very convenient to install and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a ring saw of the utility model.

[0017] Figure 2 The utility model is a partially exploded structural schematic diagram of a ring saw.

[0018] Figure 3 It is a partially exploded structural schematic diagram of the saw blade positioning mechanism in the utility model.

[0019] Figure 4 It is a schematic diagram of the exploded structure of the saw blade positioning mechanism in the utility model.

[0020] Figure 5 The utility model is a schematic diagram of the structure of a ring saw when viewed from above.

[0021] Figure 6 The utility model is a schematic diagram of a top view of the structure of a ring saw.

[0022] Figure 7 It is a schematic diagram of the exploded structure of the driving mechanism in the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below with reference to the embodiments given in the accompanying drawings.

[0024] like Figures 1 to 7 As shown, a ring saw provided in this embodiment includes a saw blade positioning mechanism 1, an annular saw blade 2 and a driving mechanism 3. The annular saw blade 2 is installed in the saw blade positioning mechanism 1. The output end of the driving mechanism 3 is connected to a driving wheel 4. The inner annular surface 21 of the annular saw blade 2 is pressed against the driving wheel 4, so that the annular saw blade 2 can rotate according to the rotation of the driving wheel 4. The saw blade positioning mechanism 1 includes a protective cover 5 and an adjusting device 6. The protective cover 5 is movably arranged on one side of the driving mechanism 3 and covers a part of the annular saw blade 2. The protective cover 5 is provided with a receiving groove 61 for installing the adjusting device 6. The adjusting device 6 includes a positioning screw 62, an elastic component 63, a pressure sensor 64 and an adjusting screw 65. One end of the positioning screw 62 passes through the groove wall of the receiving groove 61 and is fixed to the driving mechanism 3. The pressure sensor 64 is sleeved on the positioning screw 62. One end of the elastic component 63 abuts against the pressure sensor 64, and the other end of the elastic component 63 abuts against the groove wall of the receiving groove 61.

[0025] As described above, the adjusting screw 65 includes a screwing portion 66 and a screw portion 67. One end of the screw portion 67 is screwed to the positioning screw 62 and abuts against the pressure sensor 64, and the other end of the screw portion 67 is connected to the screwing portion 66. A first spring 68 is also sleeved on the screw portion 67. One end of the first spring 68 abuts against the screwing portion 66, and the other end of the first spring 68 abuts against the protective cover 5. The protective cover 5 is also provided with a pressure display device 51 connected to the pressure sensor 64. By screwing the screwing portion 66, the adjusting screw 65 can drive the protective cover 5 to move toward or away from the driving wheel 4, thereby adjusting the degree of pressure between the inner ring surface of the annular saw blade 2 and the driving wheel 4. The pressure display device 51 is used to display the degree of pressure. Specifically, when the screwing portion 66 is rotated, the screw connection between the adjusting screw 65 and the positioning screw 62 can be used to drive the protective cover 5 to move axially along the positioning screw 66. Then the first spring 68 pushes the protective cover 5 to slide along the axial direction of the guide rod 58, thereby adjusting the degree of pressure between the driving wheel 4 and the annular saw blade 2. The value of the pressure display device 51 can be used to know whether the annular saw blade 2 and the driving wheel 4 are completely pressed against each other, that is, whether the annular saw blade 2 is installed in place.

[0026] As described above, the upper cover of the receiving groove 61 is provided with a fixing plate 7, and specifically, the fixing plate 7 is fixed to the protective cover 5 by screws. The fixing plate 7 is provided with a through hole 71, one end of the screw portion 67 passes through the through hole 71 and is screwed to the positioning screw 62, and the end thereof abuts against the pressure sensor 64, one end of the first spring 68 abuts against the screwing portion 67, and the other end of the first spring 68 abuts against the fixing plate 7, and the pressure display device 51 is installed on the fixing plate 7. Specifically, a circle of stop convex portions 671 is provided at the end of the screw portion 67 close to the positioning screw 62, and the stop convex portions 671 abut against the inner surface of the fixing plate 7, and can effectively prevent the adjusting screw 65 from detaching from the through hole 71. Specifically, when the screwing portion 66 is rotated, the screw connection between the adjusting screw 65 and the positioning screw 62 can be utilized to drive the protective cover 5 to move along the axial direction of the positioning screw 66, and then the first spring 68 pushes the fixing plate 7 to make it slide along the axial direction of the guide rod 58, thereby adjusting the degree of pressure between the driving wheel 4 and the annular saw blade 2. The value of the pressure display device 51 can be used to know whether the annular saw blade 2 and the driving wheel 4 are completely pressed against each other, that is, whether the annular saw blade 2 is installed in place.

[0027] As described above, the pressure display device 51 includes an outer shell 52, a circuit board 53, a display screen 54 and a lithium battery 55. The display screen 54 is arranged on the circuit board 53 and installed in the outer shell 52, and the display screen 54 displays the degree of pressure between the inner ring surface 21 of the annular saw blade 2 and the driving wheel 4 in a numerical display manner. The lithium battery 55 is arranged in the outer shell 52 and is electrically connected to the circuit board 53. Specifically, the pressure sensor 64 is connected to the circuit board 53 by an electrical connection.

[0028] As described above, the elastic component 63 includes two second springs 631 and two positioning posts 632. The two positioning posts 632 are respectively located at the two ends of the pressure sensor 64, and one end of the two positioning posts 632 is connected to the groove wall of the receiving groove 61, and the other end of the two positioning posts 632 is inserted into the mounting hole 641 provided on the pressure sensor 64, and the pressure sensor 64 can slide up and down along the two positioning posts 632. The two second springs 631 are respectively mounted on the two positioning posts 632, and one end of the two second springs 631 abuts against the pressure sensor 64, and the other end of the two second springs 631 abuts against the groove wall of the receiving groove 61. Specifically, the two positioning posts 632 are replaced by bolts, and the rod of the bolt passes through the mounting hole 641 and the second spring 631 in sequence and is screwed to the groove wall of the receiving groove 61, and the head of the bolt abuts against the pressure sensor 64.

[0029] As described above, the driving mechanism 3 includes a head 31 located at the front end, a body 32 located in the middle and a handle 33 located at the rear end. A transmission device 34 is arranged in the head 31, and a driving motor 35 is arranged in the body 32. One end of the transmission device 34 is connected to the driving wheel 4, and the other end of the transmission device 34 is connected to the driving motor 35.

[0030] As described above, the protective cover 5 has a driving wheel groove 56 and two guide rod holes 57. The driving wheel groove 56 is used to accommodate the driving wheel 4. The two guide rod holes 57 are located at two opposite sides of the driving wheel groove 56. Guide rods 58 are installed in the two guide rod holes 57. The protective cover 5 is respectively movably sleeved on the guide rods 58 through the two guide rod holes 57. The machine head 31 is provided with a mounting seat 311 for fixing the two guide rods 58. Specifically, the two guide rods 58 are fixed to the mounting seat 311 by screws.

[0031] As described above, the positioning mechanism 1 further includes two first driven wheels 11 and two second driven wheels 12. The two first driven wheels 11 are rotatably disposed on the protective cover 5 and are located on two opposite sides of the driving wheel 4. A first side surface 22 is disposed on one side of the annular saw blade 2, and a second side surface 23 is disposed on the other side of the annular saw blade 2. A positioning ring groove 24 is disposed on the first side surface 22, and the two first driven wheels 11 are clamped in the positioning ring groove 24 of the first side surface 22. Specifically, the displacement of the protective cover 5 exerts an outward pushing force on the annular saw blade 2, so that the annular saw blade 2 is positioned between the driving wheel 4 and the two first driven wheels 11. Thus, the annular saw blade 2 will drive the two first driven wheels 11 to rotate during the rotation process. The two second driven wheels 12 are rotatably disposed on the protective cover 5 and are located on two opposite sides of the driving wheel 4, and are in contact with the second side surface 23, so that the two second driven wheels 12 can provide a supporting effect for the annular saw blade 4, and can be driven by the annular saw blade 4 and rotate with the annular saw blade 4.

[0032] As described above, the central axis of the hand-held portion 330 on the handle 33 is in the same straight line as the center point of the annular saw blade 2. Such a structural design makes the thrust generated when the hand-held handle 33 is pushed forward in the same straight line as the advancing direction of the annular saw blade 2, thereby achieving a labor-saving effect.

[0033] As described above, a gyroscope 331 is disposed in the handle 33, which is electrically connected to the drive motor 35 and can detect the ring saw falling or greatly deflecting its position, and cut off the output of the drive motor 35 in time, thereby protecting personal safety.

[0034] The above is only a preferred embodiment of the present utility model, and it cannot be used to limit the scope of the present utility model. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present utility model and the content of the utility model description are still within the scope of the present utility model patent.

Claims

1. A ring saw, comprising a saw blade positioning mechanism, an annular saw blade and a driving mechanism, wherein the annular saw blade is installed in the saw blade positioning mechanism, an output end of the driving mechanism is connected to a driving wheel, and an inner annular surface of the annular saw blade is pressed against the driving wheel, characterized in that: The saw blade positioning mechanism includes a protective cover and an adjusting device. The protective cover is movably arranged on one side of the driving mechanism and covers a part of the annular saw blade. The protective cover is provided with a receiving groove for installing the adjusting device. The adjusting device includes a positioning screw, an elastic component, a pressure sensor and an adjusting screw. One end of the positioning screw passes through the groove wall of the receiving groove and is fixed to the driving mechanism. The pressure sensor is sleeved on the positioning screw. One end of the elastic component abuts against the pressure sensor, and the other end of the elastic component abuts against the groove wall of the receiving groove. The adjusting screw includes a screwing portion and a screw portion. One end of the screw portion is threadedly connected to the positioning screw and abuts against the pressure sensor, the other end of the screw portion is connected to the screwing portion, and a first spring is sleeved on the screw portion, one end of the first spring abuts against the screwing portion, and the other end of the first spring abuts against the protective cover. The protective cover is also provided with a pressure display device connected to the pressure sensor. By screwing the screwing portion, the adjusting screw can drive the protective cover to move toward or away from the driving wheel, thereby adjusting the degree of pressure between the inner ring surface of the annular saw blade and the driving wheel, and the pressure display device is used to display the degree of pressure.

2. A ring saw according to claim 1, characterized in that: The upper cover of the accommodating groove is provided with a fixing plate, and a through hole is set on the fixing plate. One end of the screw rod part passes through the through hole and is screwed to the positioning screw and the end part abuts against the pressure sensor, one end of the first spring abuts against the screwing part, and the other end of the first spring abuts against the fixing plate, and the pressure display device is installed on the fixing plate.

3. A ring saw according to claim 2, characterized in that: The pressure display device includes an outer shell, a circuit board, a display screen and a lithium battery. The display screen is arranged on the circuit board and installed in the outer shell, and the display screen displays the degree of pressure between the inner ring surface of the annular saw blade and the driving wheel in a numerical display manner. The lithium battery is arranged in the outer shell and electrically connected to the circuit board.

4. A ring saw according to claim 1, 2 or 3, characterized in that: The elastic component includes two second springs and two positioning columns, the two positioning columns are respectively located at the two ends of the pressure sensor, and one end of the two positioning columns is connected to the groove wall of the accommodating groove, and the other ends of the two positioning columns are passed through the mounting holes set on the pressure sensor, and the pressure sensor can slide up and down along the two positioning columns, and the two second springs are respectively mounted on the two positioning columns, and one end of the two second springs abuts against the pressure sensor, and the other ends of the two second springs abuts against the groove wall of the accommodating groove.

5. A ring saw according to claim 1, 2 or 3, characterized in that: The driving mechanism includes a head at the front end, a body at the middle and a handle at the rear end. A transmission device is arranged in the head, a driving motor is arranged in the body, one end of the transmission device is connected to the driving wheel, and the other end of the transmission device is connected to the driving motor.

6. A ring saw according to claim 5, characterized in that: The protective cover has a driving wheel groove and two guide rod holes, the driving wheel groove is used to accommodate the driving wheel, the two guide rod holes are located on two opposite sides of the driving wheel groove, guide rods are installed in the two guide rod holes, the protective cover is displaceably sleeved on a guide rod through the two guide rod holes, and a mounting seat for fixing the two guide rods is provided on the machine head.

7. A ring saw according to claim 1, characterized in that: A first side surface is arranged on one side of the annular saw blade, a second side surface is arranged on the other side of the annular saw blade, and a positioning ring groove is arranged on the first side surface.

8. A ring saw according to claim 7, characterized in that: The positioning mechanism also includes two first driven wheels and two second driven wheels, the two first driven wheels are rotatably arranged on the protective cover and located on two opposite sides of the driving wheel, the two first driven wheels are clamped in the positioning ring groove of the first side surface, and the two second driven wheels are rotatably placed on the protective cover and located on two opposite sides of the driving wheel and abut against the second side surface.

9. A ring saw according to claim 5, characterized in that: The central axis of the grip portion on the handle is in the same straight line as the center point of the annular saw blade.

10. A ring saw according to claim 5, characterized in that: A gyroscope is arranged in the handle, and the gyroscope is electrically connected to the drive motor and can detect the situation that the ring saw falls or deflects greatly, and cuts off the output of the drive motor in time.

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