Ring saw

Abstract

The utility model relates to a trephine which comprises an annular saw blade, a saw blade positioning mechanism used for positioning the annular saw blade, a driving mechanism arranged on the saw blade positioning mechanism and provided with a driving wheel, and an adjusting mechanism arranged on the saw blade positioning mechanism and used for driving the driving wheel to move in the radial direction of the annular saw blade. The driving mechanism further comprises a driving shaft axially parallel to the annular saw blade, and the driving wheel is arranged on the driving shaft in a sleeving mode and located in an inner ring of the annular saw blade. An annular groove is formed in the periphery of the driving wheel, annular driving slopes are symmetrically arranged on the two side walls of the annular groove, and annular driven slopes matched with the annular driving slopes are correspondingly arranged on the two end faces of the inner ring of the annular saw blade. According to the utility model, the installation precision requirement is obviously reduced, the impact load is dynamically compensated, and the transmission reliability is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of electrical tools, specifically to a ring saw. Background Technology

[0002] Ring saw cutting devices typically transmit power through the contact between the V-groove of the drive wheel and the inclined surface of the inner ring end face of the ring saw. In traditional designs, the drive wheel and drive shaft are often fixedly connected. While this ensures basic transmission requirements, it has significant drawbacks in practical applications: First, it requires high installation precision: the center planes at both ends of the inner ring of the saw blade must coincide with the center plane of the V-groove of the drive wheel. Even slight deviations in installation can lead to uneven stress on the contact surface between the inclined surface of the inner ring of the ring saw and the V-groove of the drive wheel, causing the ring saw to wobble or vibrate, affecting cutting accuracy. Second, it suffers from insufficient transmission stability: fixed connections lack dynamic adjustment capabilities. When the ring saw experiences instantaneous impacts due to uneven material hardness or load changes, rigid transmission can easily cause slippage of the contact surface, reducing transmission efficiency and potentially damaging the drive wheel. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an electric saw in which the drive wheel and drive shaft adopt a sliding connection design, which not only significantly reduces the installation accuracy requirements, but also dynamically compensates for impact loads and enhances transmission reliability.

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

[0005] A ring saw includes a ring saw blade, a saw blade positioning mechanism for positioning the ring saw blade, a drive mechanism disposed on the saw blade positioning mechanism and having a drive wheel, and an adjustment mechanism disposed on the saw blade positioning mechanism for driving the drive wheel to move radially along the ring saw blade. The drive mechanism further includes a drive shaft disposed parallel to the axial direction of the ring saw blade. The drive wheel is sleeved on the drive shaft and located in the inner ring of the ring saw blade. An annular groove is provided on the outer circumference of the drive wheel. Annular drive inclined surfaces are symmetrically arranged on the two side walls of the annular groove. Annular driven inclined surfaces that cooperate with the annular drive inclined surfaces are correspondingly provided on the two end faces of the inner ring of the ring saw blade. The drive wheel is slidably connected to the drive shaft. A first limiting plate and a second limiting plate are also provided on the drive shaft on both sides of the axial direction of the drive wheel. The drive wheel can slide axially between the first limiting plate and the second limiting plate.

[0006] Furthermore, one end of the drive shaft is an output end, the second limiting plate is located in the output end region, a sliding key is provided on the outer periphery of the output end, and a sliding groove is provided on the center hole of the drive wheel to slide in cooperation with the sliding key.

[0007] Furthermore, the second limiting plate is located outside the output end, and one end of the slide key extends out of the output end and abuts against the second limiting plate.

[0008] Furthermore, the number of sliding keys on the output end is two or more, and they are evenly arranged on the outer periphery of the output end, and the sliding groove on the center hole of the drive wheel is correspondingly set with the sliding key on the output end.

[0009] Furthermore, the saw blade positioning mechanism includes a housing; the adjustment mechanism includes a slide, a stepped cylinder, a sliding cavity disposed on the housing with its opening facing upward and allowing the slide to move radially along the annular saw blade, and a receiving cavity disposed on the housing below the sliding cavity with its opening facing downward; the receiving cavity communicates with the sliding cavity, the opening of the receiving cavity is covered by a cover plate, the upper end of the stepped cylinder abuts against the upper surface of the cover plate, the lower end of the stepped cylinder passes through the cover plate and is fixedly connected to a first knob; a push rod is fixedly connected to the slide, the lower end of the push rod passes through the receiving cavity and extends into the stepped cylinder and is threadedly connected to it, the stepped cylinder is sleeved with a first compression spring, the first compression spring being located between the lower surface of the cover plate and the upper surface of the knob.

[0010] Furthermore, the sliding cavity is provided with sliding columns on both the left and right sides, and the slide frame is provided with sliding holes on both the left and right sides. The sliding holes on the left and right sides of the slide frame are respectively slidably engaged with the sliding columns on the left and right sides of the sliding cavity. The driving mechanism is fixedly connected to the middle of the slide frame.

[0011] Furthermore, the adjustment mechanism also includes an annular buckle, an upper pressure plate, and a lower pressure plate, all located within the cavity. The push rod passes through the middle of the upper and lower pressure plates. The two ends of the upper and lower pressure plates are connected by bolts, and a second compression spring is sleeved on each bolt. The second compression spring is located between the upper and lower pressure plates. The annular buckle is engaged with the outer periphery of the push rod. The upper surface of the upper pressure plate abuts against the lower surface of the annular buckle, and the lower pressure plate abuts against the upper surface of the stepped cylinder.

[0012] Furthermore, the saw blade positioning mechanism includes a positioning wheel and a pressing wheel disposed on the machine housing. An annular positioning groove is provided on one end face of the annular saw blade. A positioning annular flange matching the annular positioning groove is provided on the outer periphery of the positioning wheel. The positioning annular flange on the positioning wheel is engaged in the annular positioning groove on the annular saw blade. The positioning wheel and the pressing wheel are disposed opposite to each other. The pressing wheel is in contact with the other end face of the annular saw blade.

[0013] Furthermore, there are two positioning wheels and two clamping wheels, which are symmetrically arranged on both sides of the housing.

[0014] Furthermore, the drive mechanism also includes a handle with a handheld portion, the axis of which is arranged parallel to the axis of the annular saw blade.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] First, it significantly reduces the installation accuracy requirements: the sliding connection between the drive wheel and the drive shaft allows the drive wheel to have a certain floating space in the axial direction; even if there is a slight deviation in the installation, the contact surface between the annular driven inclined surface and the annular drive inclined surface can still achieve uniform force through adaptive adjustment, solving the problem of ring saw sway or vibration caused by the same installation error, and greatly improving the stability of cutting accuracy.

[0017] Secondly, dynamic compensation for impact load enhances transmission reliability: the flexible transmission characteristics of the sliding connection enable the drive wheel to finely adjust its position in real time according to the changes in the ring saw load, avoiding slippage of the contact surface under rigid fixed connection. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the adjustment mechanism of this utility model.

[0020] Figure 3 This is an exploded view of the adjustment mechanism of this utility model.

[0021] Figure 4 This is a schematic cross-sectional view of the drive shaft of this utility model.

[0022] Figure 5 This is a partially enlarged schematic diagram of the contact and engagement between the drive wheel and the ring saw blade of this utility model.

[0023] Figure 6 This is a left-side view of the ring saw of 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 6As shown in the embodiment of this utility model, a ring saw includes a ring saw blade 1, a saw blade positioning mechanism 2 for positioning the ring saw blade 1, a drive mechanism 3 with a drive wheel 31 disposed on the saw blade positioning mechanism 2, and an adjustment mechanism 4 disposed on the saw blade positioning mechanism 2 for driving the drive wheel 31 to move radially along the ring saw blade 1. The drive mechanism 3 also includes a drive shaft 32 arranged parallel to the axial direction of the ring saw blade 1. The drive wheel 31 is sleeved on the drive shaft 32 and located in the inner ring of the ring saw blade 1. The outer circumference of the drive wheel 31 is provided with an annular groove 311. The two side walls of the annular groove 311 are symmetrically provided with annular drive inclined surfaces 312. The two end faces of the inner ring of the ring saw blade 1 are correspondingly provided with annular driven inclined surfaces 11 that cooperate with the annular drive inclined surfaces 312. The drive wheel 31 is slidably connected to the drive shaft 32. The drive shaft 32 is also provided with a first limiting plate 33 and a second limiting plate 34 located on both sides of the axial direction of the drive wheel 31. The drive wheel 31 can slide axially between the first limiting plate 33 and the second limiting plate 34.

[0026] As described above, one end of the drive shaft 32 is the output end, the second limiting plate 34 is located in the output end region, a sliding key 35 is provided on the outer periphery of the output end, and a sliding groove 36 is provided on the center hole of the drive wheel 31 to slide in cooperation with the sliding key 35.

[0027] As described above, the second limiting plate 34 is located outside the output end, and one end of the slide key 35 extends out of the output end and abuts against the second limiting plate 34.

[0028] As described above, there are two or more slide keys 35 on the output end, and they are evenly arranged on the outer periphery of the output end. The slide groove 36 on the center hole of the drive wheel 31 is correspondingly set with the slide key 35 on the output end.

[0029] As described above, the saw blade positioning mechanism 2 includes a housing 21; the adjustment mechanism 4 includes a slide 41, a stepped cylinder 42, a sliding cavity 43 disposed on the housing 21 with its opening facing upward and allowing the slide 41 to move radially along the annular saw blade 1, and a receiving cavity 44 disposed on the housing 21 below the sliding cavity 43 with its opening facing downward; the receiving cavity 44 communicates with the sliding cavity 43, and a cover plate 45 covers the opening of the receiving cavity 44; the upper end of the stepped cylinder 42 abuts against the upper surface of the cover plate 45, and the lower end of the stepped cylinder 42 passes through the cover plate 45 and is fixedly connected to a knob 46; a push rod 47 is fixedly connected to the slide 41, and the lower end of the push rod 47 passes through the receiving cavity 44 and extends into the stepped cylinder 42 and is threadedly connected to it; a first compression spring 48 is sleeved on the stepped cylinder 42, and the first compression spring 48 is located between the lower surface of the cover plate 45 and the upper surface of the knob 46.

[0030] As described above, sliding columns 431 are provided on both the left and right sides of the sliding cavity 43, and sliding holes 411 are provided on both the left and right sides of the slide frame 41. The sliding holes 411 on the left and right sides of the slide frame 41 slide in cooperation with the sliding columns 431 on the left and right sides of the sliding cavity, respectively. The drive mechanism 3 is fixedly connected to the middle part of the slide frame 41.

[0031] As described above, the adjustment mechanism 4 also includes an annular buckle 441, an upper pressure plate 442, and a lower pressure plate 443, all located within the cavity 44. The push rod 47 passes through the middle of the upper pressure plate 442 and the lower pressure plate 443. The two ends of the upper pressure plate 442 and the lower pressure plate 443 are respectively connected by bolts. A second compression spring 444 is sleeved on the bolt and is located between the upper pressure plate 442 and the lower pressure plate 443. The annular buckle 441 is engaged with the outer periphery of the push rod 47. The upper surface of the upper pressure plate 442 abuts against the lower surface of the annular buckle 441, and the lower pressure plate 443 abuts against the upper surface of the stepped cylinder 42.

[0032] As described above, the saw blade positioning mechanism 2 includes a positioning wheel 22 and a pressing wheel 23 disposed on the housing 21. An annular positioning groove 12 is provided on one end face of the annular saw blade 1. A positioning annular flange 221 matching the annular positioning groove 12 is provided on the outer periphery of the positioning wheel 22. The positioning annular flange 221 on the positioning wheel 22 is engaged in the annular positioning groove 12 on the annular saw blade 1. The positioning wheel 22 and the pressing wheel 23 are disposed opposite to each other. The pressing wheel 23 is in contact with the other end face of the annular saw blade 1.

[0033] As described above, there are two positioning wheels 22 and two clamping wheels 23, which are symmetrically arranged on both sides of the housing 21, which can provide better support for the ring saw blade 1.

[0034] As described above, the drive mechanism 3 also includes a handle 33 with a handheld portion 34, the axis of which is parallel to the axis of the ring saw blade 1. This structural design ensures that the thrust generated when the handheld handle 33 is pushed forward is in the same straight line as the direction of travel of the ring saw blade 1, thereby achieving a labor-saving effect.

[0035] When the knob 46 is turned in the forward direction, the knob 46 rotates together with the stepped cylinder 42. The push rod 47, which is threaded to the stepped cylinder 42, moves radially upward along the annular saw blade 1. Through the slide 41 and the drive mechanism 3, it drives the drive wheel 31 in the drive mechanism 3 to move radially inward along the annular saw blade 1, so that the annular drive inclined surface 312 on the drive wheel 31 disengages from the annular driven inclined surface 11 on the annular saw blade 1, thus enabling the disassembly of the annular saw blade 1.

[0036] After replacing the ring saw blade 1, turn the knob 46 in the opposite direction. The drive wheel 31 moves outward along the radial direction of the ring saw blade 1, which can realize the contact transmission cooperation between the ring drive inclined surface 312 and the ring driven inclined surface 11 on the ring saw blade 1.

[0037] 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 ring saw blade, a saw blade positioning mechanism for positioning the ring saw blade, a drive mechanism disposed on the saw blade positioning mechanism and having a drive wheel, and an adjustment mechanism disposed on the saw blade positioning mechanism for driving the drive wheel to move radially along the ring saw blade, wherein the drive mechanism further comprises a drive shaft disposed parallel to the axial direction of the ring saw blade, the drive wheel being sleeved on the drive shaft and located in the inner ring of the ring saw blade; the outer circumference of the drive wheel is provided with an annular groove, and the two side walls of the annular groove are symmetrically provided with annular driving inclined surfaces, and the two end faces of the inner ring of the ring saw blade are correspondingly provided with annular driven inclined surfaces that cooperate with the annular driving inclined surfaces; characterized in that, The drive wheel is slidably connected to the drive shaft, and the drive shaft is also provided with a first limiting plate and a second limiting plate located on both sides of the drive wheel's axial direction. The drive wheel can slide axially between the first limiting plate and the second limiting plate.

2. A ring saw according to claim 1, characterized in that, One end of the drive shaft is the output end, the second limiting plate is located in the end area of ​​the output end, a sliding key is provided on the outer periphery of the output end, and a sliding groove is provided on the center hole of the drive wheel to slide with the sliding key.

3. A ring saw according to claim 2, characterized in that, The second limiting plate is located outside the output end, and one end of the slide key extends out of the output end and abuts against the second limiting plate.

4. A ring saw according to claim 3, characterized in that, The number of sliding keys on the output end is two or more, and they are evenly arranged on the outer periphery of the output end. The sliding groove on the center hole of the drive wheel is correspondingly set with the sliding key on the output end.

5. A ring saw according to claim 3, characterized in that, The saw blade positioning mechanism includes a housing; the adjustment mechanism includes a carriage, a stepped cylinder, a sliding cavity disposed on the housing with its opening facing upward and allowing the carriage to move radially along the annular saw blade, and a receiving cavity disposed on the housing below the sliding cavity with its opening facing downward; the receiving cavity communicates with the sliding cavity, the opening of the receiving cavity is covered by a cover plate, the upper end of the stepped cylinder abuts against the upper surface of the cover plate, the lower end of the stepped cylinder passes through the cover plate and is fixedly connected to a first knob; a push rod is fixedly connected to the carriage, the lower end of the push rod passes through the receiving cavity and extends into the stepped cylinder and is threadedly connected to it, the stepped cylinder is sleeved with a first compression spring, the first compression spring being located between the lower surface of the cover plate and the upper surface of the knob.

6. A ring saw according to claim 5, characterized in that, The sliding cavity is provided with sliding columns on both the left and right sides, and the slide frame is provided with sliding holes on both the left and right sides. The sliding holes on the left and right sides of the slide frame slide in cooperation with the sliding columns on the left and right sides of the sliding cavity, respectively. The driving mechanism is fixedly connected to the middle of the slide frame.

7. A ring saw according to claim 6, characterized in that, The adjustment mechanism also includes an annular buckle, an upper pressure plate, and a lower pressure plate, all located within the cavity. The push rod passes through the middle of the upper and lower pressure plates. The two ends of the upper and lower pressure plates are connected by bolts, and a second compression spring is sleeved on each bolt. The second compression spring is located between the upper and lower pressure plates. The annular buckle is engaged with the outer periphery of the push rod. The upper surface of the upper pressure plate abuts against the lower surface of the annular buckle, and the lower pressure plate abuts against the upper surface of the stepped cylinder.

8. A ring saw according to claim 1 or 2, characterized in that, The saw blade positioning mechanism includes a positioning wheel and a pressing wheel mounted on the housing. One end face of the annular saw blade is provided with an annular positioning groove. The outer periphery of the positioning wheel is provided with a positioning annular flange that matches the annular positioning groove. The positioning annular flange on the positioning wheel is engaged in the annular positioning groove on the annular saw blade. The positioning wheel and the pressing wheel are arranged opposite to each other, and the pressing wheel is in contact with the other end face of the annular saw blade.

9. A ring saw according to claim 8, characterized in that, The number of positioning wheels and clamping wheels are both two, and they are symmetrically arranged on both sides of the machine housing.

10. A ring saw according to claim 1 or 2, characterized in that, The drive mechanism also includes a handle with a handheld part, the axis of which is arranged parallel to the axis of the annular saw blade.

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