The structure of the ring saw blade and the ring saw itself require no adjustment and allow for quick replacement.

Abstract

This utility model discloses a structure for quick and easy replacement of ring saw blades without adjustment, comprising: a head shell; a power unit; a drive toothed disc; at least two sets of guide rollers; each set of guide rollers includes an upper roller and a lower roller; the outer edge of the upper roller has a surrounding protrusion, and the upper and lower rollers can be adjusted relative to each other through an adjustment structure; a ring saw blade, including an outer ring and an inner ring, with at least one groove on one side of the ring saw; a channel on the head shell for inserting the ring saw blade; the drive toothed disc is internally connected to the ring saw blade, and the drive toothed disc meshes with the driven teeth; the guide rollers are used to clamp the two sides of the ring saw blade; the protrusion of the upper roller is embedded in the groove of the ring saw blade; when installing the ring saw blade, the ring saw blade can be directly fitted onto the drive toothed disc to form a matching positioning, without the need to adjust the tightness of the ring saw blade and the drive toothed disc. The two sets of guide rollers also form positioning points to clamp the ring saw blade and prevent it from deviating. Furthermore, the ring saw blade can be directly inserted / removed by opening the upper and lower rollers, which is extremely convenient.

Description

Technical Field

[0001] This utility model belongs to the field of power tools, and relates to ring saws, and particularly to a structure and ring saw that requires no adjustment and allows for quick replacement of the ring saw blade. Background Technology

[0002] A ring saw is an engineering tool consisting of a power station and a saw head. Originally designed for cutting concrete walls, it is used in building renovation projects. A hydraulic wall saw is a special cutting tool suitable for cutting hard materials such as reinforced concrete, rock, ceramics, and brick walls. It is widely used for opening doors, windows, and ventilation openings in walls, cutting reinforced concrete beams and columns, cutting floor slabs and bridges, and processing stone materials.

[0003] For example, US10434585B2 discloses a saw blade positioning mechanism for a ring saw, including a drive source, a ring saw blade, and a drive wheel. The ring saw blade has a first side and a second side opposite to the first side. An adjusting member is disposed inside a protective housing, driving the protective housing to move longitudinally along two guide shafts. The protective housing has a drive wheel groove and two guide shaft holes. The drive wheel groove is adapted to accommodate the drive wheel and is disposed between the two guide shaft holes. Each of the two guide shaft holes of the protective housing is movably engaged with a corresponding one of the two guide shafts. The two guide shafts are configured to be fixed to the outer circumferential surface of the drive source. The drive of the protective housing is achieved through the movable engagement between the two guide shafts and their respective shaft holes.

[0004] The aforementioned ring saw machine uses an adjusting component to adjust the radial movement of the ring saw blade, thereby adjusting the cutting position of the ring saw blade after replacement and ensuring that the ring saw blade is in the optimal cutting position. However, the position of the ring saw blade needs to be repeatedly adjusted, which makes the installation time-consuming and inconvenient. Utility Model Content

[0005] This utility model provides a structure and ring saw that requires no adjustment and allows for quick replacement of the ring saw blade, making the installation of the saw blade more convenient and faster.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a structure that requires no adjustment and allows for quick replacement of the ring saw blade, comprising:

[0007] One shell, located at the front of the fuselage;

[0008] A power unit is connected to one side of the head shell, and the power unit is equipped with a power shaft;

[0009] A drive gear is connected to the drive shaft;

[0010] At least two sets of guide rollers are distributed on both sides of the drive gear disc. Each set of guide rollers includes an upper roller and a lower roller. Around the axis of the upper roller, the outer edge of the upper roller is provided with a surrounding protrusion. The upper roller and the lower roller can be adjusted to open and close relative to each other through an adjustment structure, which is located on the head shell.

[0011] A ring saw blade includes an outer ring portion with a cutting edge and an inner ring portion with a plurality of driven teeth, the driven teeth surrounding the inner ring portion and around the axis of the ring saw, and at least one groove is provided on one side of the ring saw.

[0012] The head shell has a channel for inserting the ring saw blade. The drive toothed disc is connected to the ring saw blade, and the drive toothed disc meshes with the driven tooth. The guide roller is used to clamp the two sides of the ring saw blade, and the protrusion of the upper roller is embedded in the groove of the ring saw.

[0013] A further preferred embodiment of this utility model is: the active gear disk includes an upper limit part and a lower limit part, and an active gear is sandwiched between the upper limit part and the lower limit part;

[0014] When the driven tooth of the ring saw blade meshes with the driving gear, the axial movement of the ring saw blade on the power shaft is restricted by the upper limit part and the lower limit part.

[0015] There is a clearance space behind the channel on the head shell for adjusting the position of the ring saw blade.

[0016] A further preferred embodiment of this utility model is as follows: the upper limit part is located on the outside, the lower limit part is close to the power unit, and the upper limit part is detachably connected by screws and nuts.

[0017] A further preferred embodiment of this utility model is as follows: the upper limit part and the lower limit part are both limit plates, and the upper limit part, the drive gear, and the lower limit part are sequentially sleeved on the power shaft and fixed with nuts.

[0018] A further preferred embodiment of this utility model is as follows: the upper roller is connected to the adjustment structure, and the upper roller and adjustment structure are provided on one side of the channel of the head shell, and a power shaft is provided on the other side.

[0019] A further preferred technical solution of this utility model is as follows: one side of the ring saw blade is a flat surface, and the other side is provided with two grooves. The lower roller contacts the flat surface of the ring saw blade and is connected to a fixed seat. The upper roller is connected to an adjustment structure and can move up and down, so that the protrusion of the upper roller is inserted into / out of the groove of the ring saw blade.

[0020] A further preferred technical solution of this utility model is as follows: the adjustment structure includes a hand-twisting screw that is threadedly connected to the head shell, a spring is provided on the screw, and guide rollers are provided on both sides of the upper roller. One end of the guide roller is fixedly connected to the head shell, and the upper roller slides between the two guide rollers. When the upper roller is adjusted, the hand-twisting screw rotates, and the upper roller slides along the guide rollers and the hand-twisting screw.

[0021] A further preferred technical solution of this utility model is as follows: the head shell is composed of two half shells, which are fixed by screws. The two half shells are spliced ​​together at the rear, and a channel is left at the front for the insertion of the ring saw blade.

[0022] Another subject: a ring saw, including a machine body, a motor inside the machine body, and a power supply connected to the motor. The front end of the machine body has a structure that allows for quick replacement of the ring saw blade without adjustment. The motor shaft is connected to a power unit, which includes a reduction gearbox.

[0023] Compared with existing technologies, this invention allows for direct insertion and positioning of the ring saw blade onto the drive toothed disc during installation, eliminating the need to adjust the tension of the ring saw blade and the drive toothed disc. Two sets of guide rollers also form positioning points, clamping the ring saw blade and preventing it from deviating. Furthermore, the ring saw blade can be easily inserted and removed simply by opening the upper and lower rollers. Attached Figure Description

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0025] Figure 1 This is an overall structural diagram of the present invention;

[0026] Figure 2 For the explosion of this utility model Figure 1 ;

[0027] Figure 3 For the explosion of this utility model Figure 2 ;

[0028] Figure 4 For the explosion of this utility model Figure 3 ;

[0029] Figure 5 This is a cross-sectional view of the present invention.

[0030] In the diagram: 1. Head shell; 101. Half shell; 2. Power unit; 3. Ring saw blade; 4. Groove; 5. Hand screw; 6. Screw; 7. Upper limit section; 8. Upper roller; 9. Protrusion; 10. Drive gear plate; 11. Retreat space; 12. Guide roller; 13. Lower limit section; 14. Power shaft; 15. Spring; 16. Lower roller. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0032] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0033] Figures 1-4 As shown, the structure of the ring saw blade that requires no adjustment and allows for quick replacement, and the basic components of the ring saw include:

[0034] The machine body contains a motor and a power supply connected to the motor. The motor shaft is connected to the power unit 2. The power unit 2 includes a reduction gearbox for changing direction and / or reducing speed, and a structure located at the front of the machine body that allows for quick replacement of the ring saw blade 3 without adjustment.

[0035] Figures 1-4 As shown, the innovative structure of this utility model is one that requires no adjustment and allows for quick replacement of the ring saw blade:

[0036] The structure of the ring saw blade 3, which requires no adjustment and allows for quick replacement, includes a head shell 1. The head shell 1 consists of two half shells 101, which are fixed by screws 6. The two half shells 101 are joined together at the rear and a channel is provided at the front for the ring saw blade 3 to be inserted. The head shell 1, which consists of two half shells 101, can be easily replaced or repaired by removing the screws 6.

[0037] The positioning point A of the ring saw blade 3 is:

[0038] Figures 1-4 As shown, a power unit 2 is connected to one side of the head shell 1. The power unit 2 is equipped with a power shaft 14, and a drive gear 10 is provided on the power shaft 14.

[0039] Positioning point B of the ring saw blade 3:

[0040] Figures 1-4 As shown, there are two sets of guide rollers distributed on both sides of the drive toothed disc 10. Each set of guide rollers includes an upper roller 8 and a lower roller 16. The center lines of the two upper rollers 8 are arranged in a figure-eight pattern, and the center lines of the two lower rollers 16 are also arranged in a figure-eight pattern. Around the center line of the upper roller 8, the outer edge of the upper roller 8 is provided with a surrounding protrusion 9. The upper roller 8 and the lower roller 16 can be adjusted relative to each other by an adjustment structure. The adjustment structure is located on the head shell 1. The relative opening and closing of the upper roller 8 and the lower roller 16 allows the ring saw blade 3 to be inserted.

[0041] Innovations of the Ring Saw Blade 3:

[0042] Figures 1-4As shown, the ring saw blade 3 includes an outer ring portion with a cutting edge and an inner ring portion with a plurality of driven teeth. The driven teeth are arranged around the axis of the ring saw, so the driving tooth disk 10 is internally connected to the ring saw blade 3, and the driving tooth disk 10 meshes with the driven teeth.

[0043] The relationship between the ring saw blade 3 and positioning points A and B:

[0044] Figures 1-4 As shown, during installation, the inner ring of the ring saw blade 3 is engaged with the drive toothed disc 10. At this time, the position of the ring saw blade 3 is the cutting position, avoiding repeated adjustments to the position of the drive toothed disc 10 and improving the ease of operation during the installation of the ring saw blade 3.

[0045] Figures 1-5 As shown, when using the ring saw, the power unit 2 drives the drive toothed disc 10 to rotate. At this time, the ring saw blade 3, which meshes with the drive toothed disc 10, rotates with the rotation of the drive toothed disc 10, thereby cutting the object. In this design, the drive toothed disc 10 plays the role of driving the ring saw blade 3 to rotate.

[0046] Figures 1-5 As shown, after the ring saw blade 3 is installed on the drive gear 10, the upper roller 8 and the lower roller 16 are moved to clamp the ring saw blade 3. One side of the ring saw blade 3 has at least one groove 4, preferably two grooves 4, and the other side of the ring saw blade 3 is a flat surface. The lower roller 16 contacts the flat surface of the ring saw blade 3, and the guide roller is used to clamp the two sides of the ring saw blade 3. The two protrusions 9 of the upper roller 8 are partially embedded in the two grooves 4 of the ring saw blade 3, thereby further restricting the axial movement range of the ring saw blade 3, preventing it from separating from the drive gear and shifting its position, and making the ring saw blade 3 more firmly fixed. During installation, the protrusions 9 of the upper roller 8 are inserted into the grooves 4 of the ring saw blade 3. This design allows the upper roller 8 and the lower roller 16 to restrict the position of the ring saw blade 3 without affecting its rotation, and the cooperation between the protrusions 9 and the grooves 4 can further improve the limiting of the ring saw blade 3. This is also the prior art.

[0047] Figures 1-5 As shown, it should be further explained that the upper roller 8 and the drive toothed disc 10 are respectively located on both sides of the channel of the head shell 1, and the lower roller 16 and the drive toothed disc 10 are located on the same side, so that the channel for removing the ring saw blade 3 can be exposed when the upper roller 8 is moved away, and it is also convenient for the ring saw blade 3 fitted on the drive toothed disc 10 to be removed and directly extracted.

[0048] Figures 1-5 As shown, a clearance space 11 for adjusting the position of the ring saw blade 3 is provided behind the channel on the head shell 1, which allows the ring saw blade 3 to be easily disassembled when disassembling.

[0049] Further innovative structure of the active gear 10:

[0050] Figures 1-5As shown, the drive gear 10 includes an upper limit part and a lower limit part, with a drive gear sandwiched between the upper limit part and the lower limit part. When the driven teeth of the ring saw blade 3 mesh with the drive gear, the axial movement of the ring saw blade 3 in the power shaft 14 is restricted by the upper limit part and the lower limit part.

[0051] Figures 1-5 As shown, by setting the upper limit part 7 and the lower limit part 13, the range of movement of the drive toothed disc 10 along the drive shaft can be limited, avoiding the problem of misalignment when installing the ring saw blade 3. If the upper limit part 7 and the lower limit part 13 are missing, the ring saw blade 3 is easy to shift during the clamping process of the upper roller 8 and the lower roller 16. This design ensures that the drive toothed disc 10 and the ring saw blade 3 can be quickly aligned and meshed during installation.

[0052] Figures 1-5 As shown, the upper limit part is located on the outside, and the lower limit part is close to the power unit 2. The upper limit part is detachably connected by screws 6 and nuts. Both the upper limit part and the lower limit part are limit plates. The upper limit part, the drive gear, and the lower limit part are sequentially sleeved on the power shaft 14 and fixed with nuts.

[0053] Figures 1-5 As shown, the upper limit part 7 and the lower limit part 13 are fixed to both sides of the drive gear 10 by screws 6 and nuts. When disassembling and replacing, the screws 6 and nuts can be removed to release the fixation, which is convenient and quick.

[0054] Specific instructions regarding the adjustment structure of the upper roller 8 and the lower roller 16:

[0055] Figures 1-5 As shown, the upper roller 8 is connected to the adjustment structure. The upper roller 8 and the adjustment structure are provided on one side of the channel of the head shell 1, and the power shaft 14 is provided on the other side. The lower roller 16 is connected to the fixed seat. The upper roller 8 is connected to the adjustment structure. The upper roller 8 can move up and down, so that the protrusion 9 of the upper roller 8 can be inserted into / disengaged from the groove 4 of the ring saw blade 3. The upper roller 8 and the active toothed disc 10 are respectively provided on both sides of the channel of the head shell 1, so that the channel for pulling out the ring saw blade 3 can be exposed when the upper roller 8 is moved away. At the same time, after the upper roller 8 moves up, the protrusion 9 will not engage in the groove 4 of the ring saw blade 3, and will not hinder the pulling out of the ring saw blade 3.

[0056] Figures 1-5 As shown, when disassembling the ring saw blade 3, the adjustment structure is adjusted to move the upper roller 8, thereby separating the protrusion 9 of the upper roller 8 from the groove 4 of the ring saw blade 3. At this time, the clamping of the ring saw blade 3 by the upper roller 8 and the lower roller 16 is released, and a passage is created between the upper roller 8 and the ring saw blade 3 to facilitate the removal of the ring saw blade 3. Through this passage and the clearance space 11, the ring saw blade 3 can be removed from the head shell 1. That is, the ring saw blade 3 can be pushed backward to disengage from the drive toothed disc 10, and then lifted upward to be removed. The opposite operation is performed during installation.

[0057] Figures 1-5As shown, the adjustment structure includes a hand-operated screw 5, which is threadedly connected to the head shell 1. The head shell 1 is provided with a guide roller 12, and the upper roller 8 is sleeved on the guide roller 12. The axial direction of the guide roller 12 is the direction of movement of the upper roller 8. The upper roller 8 slides on the two guide rollers 12. The hand-operated screw 5 presses against the upper roller 8. When the hand-operated screw 5 is rotated inward, the upper roller 8 moves in the clamping direction. The hand-operated screw 5 and the guide roller 12 are located on both sides of the upper roller 8 to maintain the balance when moving on both sides.

[0058] Figures 1-5 As shown, when adjusting the position of the upper roller 8, the hand screw 5 is turned. At this time, the upper roller 8 slides between the two guide rollers 12 and the hand screw 5, thereby changing the position of the upper roller 8. At the same time, the guide rollers 12 also play a role in preventing the upper roller 8 from rotating with the hand screw 5, ensuring that the upper roller 8 can slide normally.

[0059] Figures 1-5 As shown, a spring 15 is provided on the screw 6. When the hand screw 5 is rotated so that the protrusion 9 on the upper roller 8 is engaged in the groove 4 of the ring saw blade 3, the spring 15 is deformed. At this time, the spring 15 generates a reverse force on the hand screw 5, thereby making the connection between the hand screw 5 and the head shell 1 more secure.

[0060] The above describes the structure of the ring saw blade that requires no adjustment and allows for quick replacement, as well as the structure of the ring saw itself, provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A structure for a ring saw blade which is free from adjustment and capable of quick replacement, characterized in that, include: One shell, located at the front of the fuselage; A power unit is connected to one side of the head shell, and the power unit is equipped with a power shaft; A drive gear is connected to the drive shaft; At least two sets of guide rollers are distributed on both sides of the drive gear disc. Each set of guide rollers includes an upper roller and a lower roller. Around the axis of the upper roller, the outer edge of the upper roller is provided with a surrounding protrusion. The upper roller and the lower roller can be adjusted to open and close relative to each other through an adjustment structure, which is located on the head shell. A ring saw blade includes an outer ring portion with a cutting edge and an inner ring portion with a plurality of driven teeth, the driven teeth surrounding the inner ring portion and around the axis of the ring saw, and at least one groove is provided on one side of the ring saw. The head shell has a channel for inserting the ring saw blade. The drive toothed disc is connected to the ring saw blade, and the drive toothed disc meshes with the driven tooth. The guide roller is used to clamp the two sides of the ring saw blade, and the protrusion of the upper roller is embedded in the groove of the ring saw.

2. The structure of the adjustment-free and quickly replaceable ring saw blade according to claim 1, characterized in that, The drive gear includes an upper limit part and a lower limit part, with a drive gear sandwiched between the upper limit part and the lower limit part; when the driven teeth of the ring saw blade mesh with the drive gear, the axial movement of the ring saw blade in the power shaft is restricted by the upper limit part and the lower limit part. There is a clearance space behind the channel on the head shell for adjusting the position of the ring saw blade.

3. The structure of the ring saw blade that requires no adjustment and allows for quick replacement according to claim 2, characterized in that, The upper limit position is located on the outside, and the lower limit position is close to the power unit. The upper limit position is detachably connected by screws and nuts.

4. The structure of the ring saw blade that requires no adjustment and allows for quick replacement according to claim 2, characterized in that, Both the upper limit part and the lower limit part are limit plates. The upper limit part, the drive gear, and the lower limit part are sequentially sleeved on the power shaft and fixed with nuts.

5. The structure of the ring saw blade that requires no adjustment and allows for quick replacement according to claim 1, characterized in that, The upper roller is connected to the adjustment structure. The upper roller and adjustment structure are provided on one side of the channel of the head shell, and the power shaft is provided on the other side.

6. The structure of the ring saw blade that requires no adjustment and allows for quick replacement according to claim 1, characterized in that, One side of the ring saw blade is flat, and the other side has two grooves. The lower roller contacts the flat surface of the ring saw blade and is connected to a fixed base. The upper roller is connected to an adjustment structure and can move up and down, so that the protrusion of the upper roller can be inserted into / out of the groove of the ring saw blade.

7. The structure of the ring saw blade that requires no adjustment and allows for quick replacement according to claim 1, characterized in that, The adjustment structure includes a hand-tightening screw that is threadedly connected to the head shell. A spring is installed on the screw. Guide rollers are provided on both sides of the upper roller. One end of the guide roller is fixedly connected to the head shell. The upper roller slides between the two guide rollers. When adjusting the upper roller, the hand-tightening screw rotates, and the upper roller slides along the guide rollers and the hand-tightening screw.

8. The structure of the ring saw blade that requires no adjustment and allows for quick replacement according to claim 1, characterized in that, The head shell consists of two half-shells, which are fixed together by screws. The two half-shells are spliced ​​together at the rear, and a channel is left at the front for the insertion of the ring saw blade.

9. A ring saw, characterized in that, The device includes a machine body, a motor inside the machine body, and a power supply connected to the motor. The front end of the machine body is provided with a structure as described in any one of claims 1 to 8 that allows for quick replacement of the ring saw blade without adjustment. The motor shaft is connected to a power unit, which includes a reduction gearbox.

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