A trephine

Abstract

The utility model relates to a trephine, including fuselage, annular saw blade, with the first head shell that is connected with the front end of fuselage and with the second head shell that is opposite cover and is combined and can be detachably connected, be provided with the driving wheel that contacts with annular saw blade one side cooperation in the first head shell, be provided with the driven wheel that contacts with annular saw blade other side cooperation and is opposite setting with driving wheel in the second head shell, be equipped with the drive mechanism for driving driving wheel in the fuselage, its characterized in that, still be equipped with the compression assembly for limiting annular saw blade in the first head shell, the compression assembly includes slide, compression spring and sets up the pivot on the both ends of slide, the utility model has adopted the design that the locking piece is set up on the pivot and is located the side of compression wheel towards the second head shell, this not only has shortened the replacement time of compression wheel greatly, has reduced the maintenance cost of compression assembly, has also prolonged the service life of compression assembly.

Description

Technical Field

[0001] This utility model relates to the field of power tools, and in particular to a ring saw. Background Technology

[0002] In the field of power tools, circlip saws occupy a core position in cutting operations in industries such as wood processing and stone processing. With the accelerating pace of industrial production, higher demands are being placed on the efficient operation and rapid maintenance of circlip saws.

[0003] However, traditional ring saws have significant drawbacks: the clamping wheel in a ring saw is a consumable part. When the clamping wheel needs to be replaced, the operator must first move the clamping assembly inside the head housing upwards to disengage the clamping wheel from the saw blade, then disassemble the head housing to remove the saw blade, and then disassemble various connecting parts on the clamping assembly before the clamping wheel can be removed. After replacement, the clamping assembly must be reassembled. This operation is not only cumbersome and time-consuming, greatly affecting the continuous operation time of the equipment, but repeated disassembly and reassembly of the clamping assembly can also lead to loosening and deformation of its connecting parts, thereby increasing maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a ring saw that adopts a design in which a locking element is provided on the side of the rotating shaft facing the second head shell. This not only greatly shortens the replacement time of the clamping wheel and reduces the maintenance cost of the clamping assembly, but also extends the service life of the clamping assembly.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A ring saw includes a body, a ring saw blade, a first head shell connected to the front end of the body, and a second head shell detachably connected to and facing the first head shell. The first head shell contains a drive wheel that contacts and engages with one side of the ring saw blade. The second head shell contains a driven wheel that contacts and engages with the other side of the ring saw blade and is positioned opposite the drive wheel. The body contains a drive mechanism for driving the drive wheel. The first head shell also contains a clamping assembly for limiting the position of the ring saw blade. The clamping assembly includes a slide, a compression spring, and a rotating shaft disposed at both ends of the slide. The rotating shaft has an exposed portion facing the second head shell. A clamping wheel that abuts against the inner ring surface of the ring saw blade is mounted on the exposed portion. The exposed portion is also connected to a locking member located on the side of the clamping wheel facing the second head shell. The locking member is used to axially lock the clamping wheel to the rotating shaft. The compression spring presses against the slide, thereby causing the clamping wheel to elastically abut against the inner ring surface of the ring saw blade.

[0007] Furthermore, the exposed portion on the rotating shaft is provided with external threads, and the locking component includes a locking nut and a washer fitted onto the exposed portion. The external threads on the exposed portion are threadedly connected to the locking nut, and the washer abuts against the locking nut and the pressure wheel respectively.

[0008] Furthermore, the clamping assembly also includes bearing holes respectively disposed at both ends of the slide. The end of the bearing hole away from the annular saw blade is covered with an end cap. The other end of the bearing hole is provided with a shoulder and a center hole. The rotating shaft is provided with a shoulder. On one side of the shoulder, a first bearing and a sleeve are sequentially sleeved and axially abutting each other on the rotating shaft. The clamping wheel is sleeved on the rotating shaft and abuts against the sleeve. On the other side of the shoulder, a second bearing is sleeved on the rotating shaft. The inner rings of the first bearing and the second bearing both abut against the shoulder. The first bearing and the second bearing are both sleeved in the bearing hole. The outer ring of the second bearing abuts against the end cap. The sleeve is sleeved in the center hole and extends out of the slide towards the second head shell.

[0009] Furthermore, the clamping assembly also includes two sliding pillars fixedly disposed inside the first head shell and located between the two rotating shafts. The sliding base is provided with two first through holes extending through it in the front and rear directions. Each of the two first through holes is provided with a sliding sleeve. The two sliding pillars pass through the sliding sleeves in the corresponding first through holes and slide in cooperation with them.

[0010] Furthermore, the end face of the first head shell cover is provided with four first grooves that match the outer peripheral contours of the two ends of the sliding pillars respectively, and each sliding pillar is provided with an insertion hole on the outer peripheral contour of its two ends; the clamping assembly includes four pressure plates, each pressure plate is provided corresponding to one end of a sliding pillar, and its side near the sliding pillar is provided with a second groove that matches the outer peripheral contour of that end of the sliding pillar. The second groove is provided with a pin that is inserted into the insertion hole. Each pressure plate is fixed to the first head shell by screws, thereby pressing the corresponding end of the sliding pillar into the first groove, thereby fixing the two sliding pillars to the first head shell.

[0011] Furthermore, the clamping assembly also includes a connecting plate disposed in front of the slide, with first threaded through holes at both ends of the connecting plate; the slide has two stepped holes penetrating its front and rear directions, each of the two stepped holes including a first hole at the front end of the slide and a second hole at the rear end of the slide, the diameter of the first hole being larger than the diameter of the second hole; the clamping assembly also includes two bolts, each of the two bolts including a first nut and a first stud connected to the first nut, the first studs on the two bolts respectively passing through the corresponding stepped holes and extending into the corresponding first threaded through holes on the connecting plate and being threadedly connected thereto, the first nuts on the two bolts respectively abutting against the corresponding second holes, the number of compression springs is two, the two compression springs are respectively sleeved on the two bolts, and the two compression springs are both located between the connecting plate and the bottom wall of the corresponding first hole.

[0012] Furthermore, the two stepped holes are located between the two first through holes.

[0013] Furthermore, the slide block is provided with a second threaded through hole in the middle of its front and rear directions. The second threaded through hole is located between two stepped holes. The clamping assembly also includes an adjusting bolt for adjusting the clamping force of the clamping wheel and a stop plate fixedly connected to the inner surface of the front wall of the first head shell. The connecting plate abuts against the stop plate. The adjusting bolt passes through the front wall of the first head shell, the stop plate and the connecting plate in sequence and extends into the second threaded through hole on the slide block and is threadedly connected to it.

[0014] Furthermore, the adjusting bolt includes a second nut and a second stud connected to the second nut. The second stud passes through the front wall of the first head shell, the stop plate and the connecting plate in sequence and extends into the second threaded through hole on the slide block and is threadedly connected thereto. The front end of the first head shell is provided with a second through hole for accommodating the second nut. The second nut abuts against the stop plate. The second nut is provided with an internal hexagonal notch for screwing in with an internal hexagonal wrench.

[0015] Furthermore, the annular saw blade has an annular groove on the side that contacts and engages with the drive wheel, and the drive wheel has an annular flange on its outer periphery that contacts and engages with the annular groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention features a locking element on the rotating shaft on the side of the clamping wheel facing the second head shell. When replacing the clamping wheel, first move the clamping wheel upwards in the clamping assembly, then disassemble the second head shell connected to the first head shell, remove the ring saw blade, and disassemble the locking element on the rotating shaft to replace the clamping wheel. This design eliminates the need to disassemble various connecting parts on the clamping assembly, significantly shortening replacement time. Simultaneously, it avoids loosening and deformation of the clamping assembly due to frequent operation, thereby reducing overall maintenance costs and extending the service life of the clamping assembly. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a ring saw according to this utility model.

[0019] Figure 2 This is a schematic diagram of the compression component in this utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the pressure wheel and related components in this utility model.

[0021] Figure 4 This is a cross-sectional schematic diagram of the sliding column and related connecting parts in this utility model.

[0022] Figure 5 This is a three-dimensional schematic diagram of the second housing and the driven wheel in this utility model.

[0023] Figure 6 This is a three-dimensional schematic diagram of the sliding column and pressure plate in this utility model. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings.

[0025] like Figures 1 to 6 As shown in the embodiment of this utility model, a ring saw includes a body 1, a ring saw blade 2, a first head shell 3 connected to the front end of the body 1, and a second head shell 4 detachably connected to and facing the first head shell 3. The first head shell 3 contains a drive wheel 31 that contacts and engages with one side of the ring saw blade 2. The second head shell 4 contains a driven wheel 41 that contacts and engages with the other side of the ring saw blade 2 and is positioned opposite to the drive wheel 31. The body 1 contains a drive mechanism for driving the drive wheel 31, and the first head shell 3 also contains a clamping assembly 5 for limiting the position of the ring saw blade 2. The clamping assembly 5 includes a slide 51, a compression spring 52, and a rotating shaft 53 disposed at both ends of the slide 51. The rotating shaft 53 has an exposed portion 531 facing the second head shell 4. The exposed portion 531 is fitted with a clamping wheel 54 that abuts against the inner ring surface of the annular saw blade 2. The exposed portion 531 is also connected to a locking member 55 located on the side of the clamping wheel 54 facing the second head shell 4. The locking member 55 is used to axially lock the clamping wheel 54 to the rotating shaft 53. The compression spring 52 presses against the slide 51, thereby causing the clamping wheel 54 to elastically abut against the inner ring surface of the annular saw blade 2.

[0026] As described above, the exposed portion 531 on the rotating shaft 53 is provided with an external thread, and the locking member 55 includes a locking nut 551 and a washer 552 sleeved on the exposed portion 531. The external thread on the exposed portion 531 is connected to the locking nut thread 551, and the washer 552 abuts against the locking nut 551 and the pressure wheel 54 respectively.

[0027] As described above, the clamping assembly 5 also includes bearing holes 56 respectively provided at both ends of the slide. The end of the bearing hole 56 away from the annular saw blade 2 is covered with an end cap 561. The other end of the bearing hole 56 is provided with a shoulder 562 and a center hole 563. The rotating shaft 53 is provided with a shoulder 532. The rotating shaft 53 is fitted with a first bearing 533 and a sleeve 534 in sequence on one side of the shoulder 532 and in sequence abutting axially. The clamping wheel 54 is sleeved on the rotating shaft 53 and abuts against the sleeve 534. A second bearing 535 is fitted onto the other side of the shaft shoulder 532 on the rotating shaft 53. The inner rings of the first bearing 533 and the second bearing 535 both abut against the shaft shoulder 532. The first bearing 533 and the second bearing 535 are both fitted into the bearing hole 56. The outer ring of the first bearing 533 abuts against the hole shoulder 562, and the outer ring of the second bearing 535 abuts against the end cover 561. The sleeve 534 is fitted into the center hole 563 and extends out of the slide block 51 towards the end of the second head shell 4.

[0028] As described above, the clamping assembly 5 also includes two sliding pillars 57 fixedly disposed inside the first head shell 3 and located between the two rotating shafts 53. The slide base 51 is provided with two first through holes 511 extending through its front and rear directions. Each of the two first through holes 511 is provided with a sliding sleeve 512. The two sliding pillars 57 pass through the sliding sleeves 512 in the corresponding first through holes 511 and slide in cooperation with them.

[0029] As described above, the end face of the first head shell 3 at the closing end is provided with four first grooves 32 that match the outer periphery contours of the two ends of the sliding pillars 57 respectively. Each sliding pillar 57 is provided with an insertion hole 571 on the outer periphery of both ends. The pressing assembly 5 includes four pressure plates 58, each pressure plate 58 is provided corresponding to one end of a sliding pillar 57. The side of the pressure plate 58 near the sliding pillar 57 is provided with a second groove 581 that matches the outer periphery contour of that end of the sliding pillar 57. The second groove 581 is provided with a pin 582 that is inserted into the insertion hole 571. Each pressure plate 58 is fixed to the first head shell 3 by screws, so that the corresponding end of the sliding pillar 57 is pressed into the first groove 32, thereby fixing the two sliding pillars 57 to the first head shell 3.

[0030] As described above, the clamping assembly 5 further includes a connecting plate 59 disposed in front of the slide 51, and both ends of the connecting plate 59 are provided with first threaded through holes 591; the slide 51 is provided with two stepped holes 513 penetrating its front and rear directions, and each of the two stepped holes 513 includes a first hole 514 located at the front end of the slide 51 and a second hole 515 located at the rear end of the slide 51, the diameter of the first hole 514 being larger than the diameter of the second hole 515; the clamping assembly 5 further includes two bolts 100, each of the two bolts 100 including a first nut 101 and a... The first nut 101 connects to the first stud 102. The first studs 102 on the two bolts 100 pass through the corresponding stepped holes 515 and extend into the corresponding first threaded through holes 591 on the connecting plate 59 and are threadedly connected thereto. The first nuts 101 on the two bolts 100 abut against the corresponding second holes 515. There are two compression springs 52. The two compression springs 52 are respectively sleeved on the two bolts 100. The two compression springs 52 are located between the connecting plate 59 and the bottom wall of the corresponding first hole 514.

[0031] As described above, the two stepped holes 513 are located between the two first through holes 511.

[0032] As described above, the slide 51 has a second threaded through hole 516 in the middle, which runs through its front and rear directions. The second threaded through hole 516 is located between two stepped holes 513. The clamping assembly 5 also includes an adjusting bolt 110 for adjusting the clamping force of the clamping wheel 54 and a stop plate 120 fixedly connected to the inner surface of the front wall of the first head shell 3. The connecting plate 59 abuts against the stop plate 120. The adjusting bolt 110 passes through the front wall of the first head shell 3, the stop plate 120 and the connecting plate 59 in sequence and extends into the second threaded through hole 516 on the slide 51 and is threadedly connected to it.

[0033] As described above, the adjusting bolt 110 includes a second nut 111 and a second stud 112 connected to the second nut 111. The second stud 112 passes through the front wall of the first head shell 3, the stop plate 120 and the connecting plate 59 in sequence and extends into the second threaded through hole 516 on the slide block 51 and is threadedly connected thereto. The front end of the first head shell 3 is provided with a second through hole 33 for accommodating the second nut 111. The second nut 112 abuts against the stop plate 59. The second nut 111 is provided with an internal hexagonal notch for screwing in with an internal hexagonal wrench.

[0034] As described above, the annular saw blade 2 has an annular groove 21 on the side that contacts and engages with the drive wheel 31, and the drive wheel 31 has an annular flange 311 on its outer periphery that contacts and engages with the annular groove 21.

[0035] To replace the pressure roller 54, follow these steps: First, use an Allen wrench to tighten the adjusting bolt 110, causing the pressure roller 54 to release its elastic contact with the inner ring surface of the ring saw blade 2 and disengage from it. Next, remove the second head shell 4, which is detachably connected to the first head shell 3. Finally, unscrew the locking nut on the rotating shaft 53 to replace the pressure roller 54.

[0036] The above description is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the scope of the present utility model patent application and the description of the utility model shall still fall within the scope of the present utility model patent.

Claims

1. A ring saw, comprising a body, a ring saw blade, a first head shell connected to the front end of the body, and a second head shell detachably connected to and facing the first head shell, wherein a drive wheel is disposed within the first head shell and engages with one side of the ring saw blade, and a driven wheel is disposed within the second head shell and engages with the other side of the ring saw blade and is disposed opposite to the drive wheel; the body is provided with a drive mechanism for driving the drive wheel, characterized in that... The first head shell is also provided with a clamping assembly for limiting the position of the annular saw blade. The clamping assembly includes a slide, a compression spring, and a rotating shaft disposed at both ends of the slide. The rotating shaft has an exposed portion facing the second head shell. The exposed portion is equipped with a clamping wheel that abuts against the inner ring surface of the annular saw blade. The exposed portion is also connected to a locking member located on the side of the clamping wheel facing the second head shell. The locking member is used to axially lock the clamping wheel to the rotating shaft. The compression spring presses against the slide, thereby causing the clamping wheel to elastically abut against the inner ring surface of the annular saw blade.

2. A ring saw according to claim 1, characterized in that, The exposed portion of the rotating shaft is provided with external threads. The locking component includes a locking nut and a washer fitted on the exposed portion. The external threads on the exposed portion are threadedly connected to the locking nut. The washer abuts against the locking nut and the pressure wheel respectively.

3. A ring saw according to claim 2, characterized in that, The clamping assembly also includes bearing holes respectively provided at both ends of the slide. The end of the bearing hole away from the annular saw blade is covered with an end cap. The other end of the bearing hole is provided with a shoulder and a center hole. The rotating shaft is provided with a shoulder. On the rotating shaft, a first bearing and a sleeve are sequentially sleeved and axially abutting each other on one side of the shoulder. The clamping wheel is sleeved on the rotating shaft and abuts against the sleeve. A second bearing is sleeved on the rotating shaft on the other side of the shoulder. The inner rings of the first bearing and the second bearing both abut against the shoulder. The first bearing and the second bearing are both sleeved in the bearing hole. The outer ring of the first bearing abuts against the shoulder, and the outer ring of the second bearing abuts against the end cap. The sleeve is sleeved in the center hole and extends out of the slide towards the second head shell.

4. A ring saw according to claim 2 or 3, characterized in that, The clamping assembly also includes two sliding pillars fixedly disposed inside the first head shell and located between the two rotating shafts. The sliding base is provided with two first through holes extending through its front and rear directions. Each of the two first through holes is provided with a sliding sleeve. The two sliding pillars pass through the sliding sleeves in the corresponding first through holes and slide in cooperation with them.

5. A ring saw according to claim 4, characterized in that, The end face of the first head shell cover is provided with four first grooves that match the outer circumferential contours of the two ends of the sliding pillars respectively. Each sliding pillar has an insertion hole on its outer circumference at both ends. The clamping assembly includes four pressure plates, each pressure plate is provided corresponding to one end of a sliding pillar. The side of the pressure plate near the sliding pillar is provided with a second groove that matches the outer circumferential contour of that end of the sliding pillar. The second groove is provided with a pin that is inserted into the insertion hole. Each pressure plate is fixed to the first head shell by screws, so that the corresponding end of the sliding pillar is pressed into the first groove, thereby fixing the two sliding pillars to the first head shell.

6. A ring saw according to claim 5, characterized in that, The clamping assembly further includes a connecting plate disposed in front of the slide, and each end of the connecting plate is provided with a first threaded through hole; the slide is provided with two stepped holes penetrating its front and rear directions, each of the two stepped holes including a first hole located at the front end of the slide and a second hole located at the rear end of the slide, the diameter of the first hole being larger than the diameter of the second hole; the clamping assembly further includes two bolts, each of the two bolts including a first nut and a first stud connected to the first nut, the first studs on the two bolts respectively passing through the corresponding stepped holes and extending into the corresponding first threaded through holes on the connecting plate and being threadedly connected thereto, the first nuts on the two bolts respectively abutting against the corresponding second holes, the number of compression springs being two, the two compression springs respectively being sleeved on the two bolts, and both of the compression springs being located between the connecting plate and the bottom wall of the corresponding first hole.

7. A ring saw according to claim 6, characterized in that, The two stepped holes are located between the two first through holes.

8. A ring saw according to claim 6 or 7, characterized in that, The slide block is provided with a second threaded through hole in the front and rear directions in the middle. The second threaded through hole is located between two stepped holes. The clamping assembly also includes an adjusting bolt for adjusting the clamping force of the clamping wheel and a stop plate fixedly connected to the inner surface of the front wall of the first head shell. The connecting plate abuts against the stop plate. The adjusting bolt passes through the front wall of the first head shell, the stop plate and the connecting plate in sequence and extends into the second threaded through hole on the slide block and is threadedly connected to it.

9. A ring saw according to claim 8, characterized in that, The adjusting bolt includes a second nut and a second stud connected to the second nut. The second stud passes through the front wall of the first head shell, the stop plate and the connecting plate in sequence and extends into the second threaded through hole on the slide and is threadedly connected to it. The front end of the first head shell is provided with a second through hole for accommodating the second nut. The second nut abuts against the stop plate. The second nut is provided with an internal hexagonal notch for screwing in with an internal hexagonal wrench.

10. A ring saw according to claim 1, characterized in that, The annular saw blade has an annular groove on the side that contacts and engages with the drive wheel, and the drive wheel has an annular flange on its outer periphery that contacts and engages with the annular groove.

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