Trephine capable of adjusting size of installed saw blade

Abstract

The trephine comprises a machine body, a saw blade positioning mechanism and an annular saw blade, the saw blade positioning mechanism is arranged at the front end of the machine body, the rear end of the annular saw blade is arranged in the saw blade positioning mechanism, the saw blade positioning mechanism comprises a saw blade mounting seat and a position adjusting assembly, the saw blade mounting seat is arranged at the front end of the machine body, and the position adjusting assembly is arranged on the saw blade mounting seat. The position adjusting assembly comprises an adjusting screw rod, a positioning wheel mounting seat, a guide sliding rod and two positioning wheels, the two positioning wheels are rotatably arranged at the upper end and the lower end of the positioning wheel mounting seat respectively, the two positioning wheels are in contact fit with the inner ring face of the rear end of the annular saw blade, and the positioning wheel mounting seat is slidably mounted on the outer side of the saw blade mounting seat through the guide sliding rod; the driving wheel is arranged at the front end of the machine body, the driving mechanism is arranged in the machine body, and the driving wheel is driven by the driving mechanism and is in contact fit with the side face of the annular saw blade. And by rotating the adjusting screw rod, the distance between the driving wheel and the two positioning wheels can be adjusted, the saw blades with different sizes can be mounted, and the saw blade mounting device is very practical.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a ring saw with an adjustable saw blade size. Background Technology

[0002] Most common ring saws on the market come with a single model equipped with a ring saw blade of a specific diameter. However, when facing different construction environments and requiring the use of ring saw blades of different diameters, multiple ring saws with different diameter blades need to be carried. This makes it impossible for a single model to accommodate ring saw blades of different diameters, resulting in operators carrying multiple large ring saws during construction, which is extremely inconvenient. Furthermore, the disassembly process for changing the ring saw blade on common ring saws on the market is also very cumbersome and impractical. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a ring saw with an adjustable blade size. By rotating the adjusting screw, the distance between the drive wheel and the two positioning wheels can be adjusted to accommodate the installation of ring saw blades of different sizes.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An adjustable ring saw includes a machine body, a saw blade positioning mechanism, and a ring saw blade. The saw blade positioning mechanism is located at the front end of the machine body. The rear end of the ring saw blade is inserted into the saw blade positioning mechanism, while the front end of the ring saw blade protrudes in front of the saw blade positioning mechanism. The saw blade positioning mechanism includes a saw blade mounting seat and a position adjustment assembly. The saw blade mounting seat is located on one side of the front end of the machine body. The position adjustment assembly includes an adjustment screw, a positioning wheel mounting seat, a guide rod, and two positioning wheels. The two positioning wheels are rotatably mounted at the upper and lower ends of the positioning wheel mounting seat, respectively, and the two positioning wheels are in contact with the inner ring surface of the rear end of the ring saw blade. The positioning wheel mounting seat is slidably mounted on the outside of the saw blade mounting seat via the guide rod. The assembly also includes a drive wheel located at the front end of the machine body and a drive mechanism located within the machine body. The drive wheel is driven by the drive mechanism and is in contact with one side of the ring saw blade. By rotating the adjustment screw, the distance between the drive wheel and the two positioning wheels can be adjusted to accommodate the installation of ring saw blades of different sizes.

[0006] Further, the positioning wheel mounting seat is provided with a threaded hole and a through hole, the outer side of the saw blade mounting seat is provided with a guide slide rod mounting portion and an adjusting screw rod mounting portion, the guide slide rod is arranged in the through hole and fixedly connected with the guide slide rod mounting portion at both ends, and the rod portion of the adjusting screw rod is threadedly connected with the threaded hole and rotatably connected with the adjusting screw rod mounting portion at both ends.

[0007] Further, the surface of the annular saw blade in contact with the driving wheel is provided with an annular clamping groove, and the driving wheel is provided with an annular clamping tooth matched with the annular clamping groove.

[0008] Further, the outer cover is further provided with a locking member and a rotating shaft, the rear end of the outer cover is rotatably connected to the other side of the front end of the machine body through the rotating shaft, and the locking member is arranged on the outer side of the outer cover and can lock the outer cover on the saw blade mounting seat.

[0009] Further, the inner side of the outer cover is provided with a rotatable driven wheel, and when the outer cover is locked on the saw blade mounting seat, the driven wheel is in contact with the other side surface of the annular saw blade.

[0010] Further, the saw blade mounting seat is provided with a locking hole, and the locking member can be locked with the locking hole after the outer cover is closed.

[0011] Further, the two positioning wheels are provided with annular grooves, and the inner ring of the annular saw blade is clamped in the annular grooves.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] Firstly, the utility model can move the positioning wheel mounting seat forward and backward on the saw blade mounting seat by rotating the adjusting screw rod, so that the distance between the driving wheel and the two positioning wheels is changed and the installation of the annular saw blade of different sizes is adapted, so that one model can be used for annular saw blades of different diameters, which is more practical.

[0014] Secondly, the structure design of the outer cover, the rotating shaft and the locking member in the utility model is that when the saw blade needs to be disassembled, the outer cover is opened by releasing the locking state of the locking member on the outer cover, then the positioning wheel mounting seat is moved forward by rotating the adjusting screw rod, so that the two positioning wheels are loosened or separated from the inner ring surface of the annular saw blade, and then the annular saw blade is disassembled conveniently, and the whole disassembly operation is very simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a three-dimensional structure diagram of the annular saw of the utility model Figure 1 .

[0016] Figure 2The utility model relates to a three-dimensional structure schematic diagram of a ring saw with adjustable installation saw blade size Figure 2 .

[0017] Figure 3 The utility model relates to a three-dimensional structure schematic diagram of a ring saw with adjustable installation saw blade size

[0018] Figure 4 The utility model relates to a three-dimensional structure schematic diagram of a ring saw with adjustable installation saw blade size

[0019] Figure 5 The utility model relates to a three-dimensional structure schematic diagram of a ring saw with adjustable installation saw blade size Specific implementation

[0020] The utility model will be further explained in detail in connection with the embodiments given below.

[0021] As Figures 1 to 5 shown, the utility model provides a kind of ring saw with adjustable installation saw blade size, including body 1, saw blade positioning mechanism 2 and annular saw blade 3, saw blade positioning mechanism 2 is set at the front end of body 1, the rear end of annular saw blade 3 is inserted into saw blade positioning mechanism 2, and the front end of annular saw blade 3 is exposed to the front of saw blade positioning mechanism 2.Saw blade positioning mechanism 2 includes saw blade mounting seat 4 and position adjusting assembly 5, and saw blade mounting seat 4 is set at the front end of body 1 one side.

[0022] As described above, position adjusting assembly 5 includes adjusting screw 6, positioning wheel mounting seat 7, guide slide bar 8 and two positioning wheels 9, two positioning wheels 9 are rotatably set at the upper and lower ends of positioning wheel mounting seat 7 respectively, and two positioning wheels 9 are in contact with the rear end inner ring surface of annular saw blade 3.Positioning wheel mounting seat 7 is slidably installed on the outer side of saw blade mounting seat 4 by guide slide bar 8.It also includes driving wheel 11 set at the front end of body 1 and driving mechanism set in body 1, and driving mechanism can be driving motor, not shown in the figure.Driving wheel 11 is driven by driving mechanism and is in contact with one side surface of annular saw blade 3, and by rotating adjusting screw 6, the spacing between driving wheel 11 and two positioning wheels 9 can be adjusted and the installation of annular saw blade 3 of different size is adapted.

[0023] As described above, when the adjusting screw 6 is rotated to move the positioning wheel mounting seat 7 forward on the saw blade mounting seat 4, the distance between the two positioning wheels 9 and the driving wheel 11 is increased (a larger circular ring-shaped saw blade can be accommodated between the two positioning wheels 9 and the driving wheel 11), at this time, a larger diameter size of the annular saw blade 3 can be replaced, when the adjusting screw 6 is rotated to move the positioning wheel mounting seat 7 backward, the distance between the two positioning wheels 9 and the driving wheel 11 is reduced (a smaller circular ring-shaped saw blade can be accommodated between the two positioning wheels 9 and the driving wheel 11), at this time, a smaller diameter size of the annular saw blade 3 can be replaced. The structure design of the position adjusting assembly 5 in the present application makes a model of the ring saw suitable for different diameter sizes of the annular saw blade 3, which is very practical.

[0024] As described above, the positioning wheel mounting seat 7 is provided with a threaded hole 71 and a through hole 72. The outer side of the saw blade mounting seat 4 is provided with a guide slide rod mounting portion 42 and an adjusting screw mounting portion 43, the guide slide rod 8 is threaded in the through hole 72 and both ends are fixedly connected with the guide slide rod mounting portion 42, specifically, the through hole 72 is provided with two and located at the upper and lower ends of the positioning wheel mounting seat 7 respectively, the corresponding guide slide rod 8 is also provided with two and threaded in the corresponding through hole 72 respectively, the rod portion of the adjusting screw 6 is threadedly connected with the threaded hole 71 and both ends are rotatably connected with the adjusting screw mounting portion 43.

[0025] As described above, the surface of the annular saw blade 3 in contact with the driving wheel 11 is provided with an annular clamping groove 31, and the driving wheel 11 is provided with an annular clamping tooth 12 matched with the annular clamping groove 31. Such structure design makes the annular saw blade 3 and the driving wheel 11 better matched.

[0026] As described above, it also includes an outer cover 21, a locking member 22 and a rotating shaft 23, the rear end of the outer cover 21 is rotatably connected to the other side of the front end of the body 1 through the rotating shaft 23, the locking member 22 is arranged on the outer side of the outer cover 21 and can lock the outer cover 21 on the saw blade mounting seat 4.

[0027] As described above, when the ring saw blade 3 needs to be disassembled and replaced, the locking member 22 on the outer cover 21 is loosened first, so that the outer cover 21 is in a disengaged state with the saw blade mounting seat 4, and then the adjusting screw 6 is rotated to move the positioning wheel mounting seat 7 along the rod portion of the adjusting screw 6 forward (at this time, the positioning wheel mounting seat 7 will move forward relative to the saw blade mounting seat 4), so that the two positioning wheels 9 are loosened or disengaged from the inner ring surface of the ring saw blade 3, and the ring saw blade 3 can be disassembled at this time. After the ring saw blade 3 is replaced, the adjusting screw 6 is rotated to move the positioning wheel mounting seat 7 along the rod portion of the adjusting screw 6 backward (at this time, the positioning wheel mounting seat 7 will move forward relative to the saw blade mounting seat 4), so that the two positioning wheels 9 return to the position of contacting the inner ring surface of the replaced ring saw blade 3, and then the outer cover 21 is closed and the locking member 22 is tightened to lock the saw blade mounting seat 4, the whole disassembly operation is very simple and convenient. Conversely, the ring saw blade 3 can be installed on the ring saw.

[0028] As described above, the inner side of the outer cover 21 is provided with a rotatable driven wheel 24, and when the outer cover 21 is locked on the saw blade mounting seat 4, the driven wheel 24 is in contact with the other side of the ring saw blade 3, so that the saw blade rotates more stably.

[0029] As described above, the saw blade mounting seat 4 is provided with a locking hole 41, and after the outer cover 21 is closed, the locking member 22 can be locked with the locking hole 41. Specifically, the locking member 22 is an internal hexagonal screw.

[0030] As described above, the two positioning wheels 9 are each provided with an annular groove 91, and the inner ring of the ring saw blade 3 is clamped in the annular groove 91. Such a structure design makes the ring saw blade 3 rotate more stably and safely.

[0031] The above is only a preferred embodiment of the present application, which cannot limit the scope of the present application, that is, any simple equivalent changes and modifications made according to the scope of the present application and the content of the present application description are still within the scope of the present application.

Claims

1. A ring saw with adjustable blade size, comprising a machine body, a blade positioning mechanism, and a ring saw blade, wherein the blade positioning mechanism is disposed at the front end of the machine body, the rear end of the ring saw blade is inserted into the blade positioning mechanism, and the front end of the ring saw blade protrudes in front of the blade positioning mechanism, characterized in that: The saw blade positioning mechanism comprises a saw blade mounting seat arranged at one side of the front end of the machine body and a position adjusting assembly, the position adjusting assembly comprises an adjusting screw, a positioning wheel mounting seat, a guide sliding rod and two positioning wheels, the two positioning wheels are rotatably arranged at the upper and lower ends of the positioning wheel mounting seat respectively, and the two positioning wheels are in contact with the inner ring surface of the rear end of the annular saw blade, the positioning wheel mounting seat is slidably mounted on the outer side of the saw blade mounting seat through the guide sliding rod, the positioning wheel mounting seat further comprises a driving wheel arranged at the front end of the machine body and a driving mechanism arranged in the machine body, the driving wheel is driven by the driving mechanism and is in contact with one side surface of the annular saw blade, and the distance between the driving wheel and the two positioning wheels can be adjusted by rotating the adjusting screw to adapt to the installation of annular saw blades of different sizes.

2. The adjustable mounting arbor ring saw of claim 1, wherein: The positioning wheel mounting seat is provided with a threaded hole and a through hole, the outer side of the saw blade mounting seat is provided with a guide sliding rod mounting portion and an adjusting screw mounting portion, the guide sliding rod is arranged in the through hole and is fixedly connected to the guide sliding rod mounting portion at both ends, and the rod portion of the adjusting screw is threadedly connected to the threaded hole and is rotatably connected to the adjusting screw mounting portion at both ends.

3. The adjustable mounting arbor ring saw of claim 2, wherein: The surface of the annular saw blade in contact with the driving wheel is provided with an annular clamping groove, and the driving wheel is provided with an annular clamping tooth matched with the annular clamping groove.

4. The adjustable mounting arbor ring saw of claim 3, wherein: Further comprising an outer cover, a locking member and a rotating shaft, the rear end of the outer cover is rotatably connected to the other side of the front end of the machine body through the rotating shaft, and the locking member is arranged on the outer side of the outer cover and can lock the outer cover on the saw blade mounting seat.

5. The adjustable mounting arbor ring saw of claim 4, wherein: The inner side of the outer cover is provided with a rotatable driven wheel, and when the outer cover is locked on the saw blade mounting seat, the driven wheel is in contact with the other side surface of the annular saw blade.

6. The adjustable mounting arbor ring saw of claim 5, wherein: The saw blade mounting seat is provided with a locking hole, and when the outer cover is closed, the locking member can be locked with the locking hole.

7. The adjustable mounting arbor ring saw of claim 1, wherein: The two positioning wheels are each provided with an annular groove, and the inner ring of the annular saw blade is clamped in the annular groove.

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