Ring saw stable in transmission

Abstract

The utility model relates to the field of electric tools, in particular to a trephine with stable transmission, which comprises a driving assembly and a shell which are rotatably connected, the driving assembly comprises a driving device and a shell, the driving device is positioned in the shell, the front end of the shell is rotatably connected with a trephine blade, the trephine blade is driven by the driving device to rotate, a driven gear is further arranged in the shell, and the driven gear is driven by the driving device to rotate. The driven gear is in transmission connection with the driving device, a sawtooth ring is arranged in the trephine blade, and the sawtooth ring is meshed with the driven gear; the trephine is stable in transmission, and the problem that a trephine blade of a traditional trephine is prone to slipping is solved.

Description

Technical Field

[0001] The utility model relates to the field of power tools, in particular to a ring saw with stable transmission. Background Art

[0002] Currently, most of the equipment used for cutting materials such as concrete and wood is concrete cutting equipment. However, the volume of concrete cutting equipment is generally large, and its mobility and portability are poor. It is very inconvenient to use in a narrow space, and users need to spend a lot of time learning to utilize the functions of concrete cutting equipment, which greatly increases the usage cost of concrete cutting equipment.

[0003] Therefore, ring saws have emerged on the market. The overall volume of ring saws is small, and their weight is significantly lower than that of concrete cutting equipment. Moreover, they are very easy to operate, very user-friendly for novices, and also greatly reduce the usage cost. However, when a ring saw encounters materials with relatively high hardness during use, the ring saw blade used for cutting is prone to slipping, which greatly increases the safety hazards of using the ring saw and poses a certain threat to the personal safety of users. Content of the Utility Model

[0004] To solve the above problems, the utility model provides a ring saw with stable transmission, which solves the problem that the ring saw blade of a traditional ring saw is prone to slipping.

[0005] The technical solution adopted by the utility model is as follows: A ring saw with stable transmission, including a driving assembly and a housing connected by rotation. The driving assembly includes a driving device and an outer shell. The driving device is located inside the outer shell. A ring saw blade is rotatably connected to the front end of the housing. The ring saw blade is driven to rotate by the driving device. A driven gear is also arranged inside the housing. The driven gear is in transmission connection with the driving device. A sawtooth ring is arranged inside the ring saw blade. The sawtooth ring is meshed with the driven gear.

[0006] Through the above technical solution, when the driving device on the driving assembly is started, the driven gear is driven to rotate, and the ring saw blade is driven to rotate by the sawtooth ring meshed with the driven gear. Then, the user can use the ring saw to cut materials such as concrete and wood. The ring saw of the utility model transmits the driving force through the mutually meshed sawtooth ring and driven gear, thereby driving the ring saw blade to cut materials such as concrete and wood. The tightly meshed driven gear and ring saw blade effectively avoid the slipping between the saw blade and the transmission mechanism of the traditional ring saw, greatly ensuring the operation safety of users.

[0007] Furthermore, the thickness of the driven gear is greater than the thickness of the ring saw blade.

[0008] Through the above technical solution, the thickness of the driven gear is greater than that of the circular saw blade, which makes the tooth surfaces of the driven gear and the sawtooth ring mesh more closely, and also makes the driven gear very stable as a whole when driven.

[0009] Further, the driven gear is a spur gear, and the spur gear and the circular saw blade are in the same plane.

[0010] Through the above technical solution, the spur gear and the circular saw blade being in the same plane makes the force at the connection between the spur gear and the circular saw blade very balanced, avoiding uneven force between the meshing tooth surfaces due to relative displacement of the positions of the spur gear and the circular saw blade, thereby causing situations such as the spur gear or the circular saw blade swinging or the tooth surface breaking.

[0011] Further, a limiting piece is fixedly connected to the outer shell, the limiting piece is rotatably connected to the housing, a locking device is connected to the housing, and an arc-shaped limiting hole for the locking device to extend into and fit is provided on the limiting piece.

[0012] Through the above technical solution, the user can change the angle of the drive assembly relative to the housing by changing the relative positions of the locking device and the arc-shaped limiting hole, so that the user can very conveniently change different holding postures, facilitating the user to use the circular saw for cutting operations in different working scenarios.

[0013] Further, the number of the arc-shaped limiting holes on the limiting piece is two, and the rotation centers of the two arc-shaped limiting holes are the same; the number of the locking devices on the housing is two, and the two locking devices are respectively inserted into the two arc-shaped limiting holes.

[0014] Through the above technical solution, the same rotation centers of the two arc-shaped limiting holes make it very labor-saving for the user to adjust the angle of the drive assembly relative to the housing, and it is more convenient to use; the two locking devices are respectively inserted into the two arc-shaped limiting holes makes the force between the locking device and the limiting piece more balanced, and the overall structure is more stable.

[0015] Further, the locking device includes a nut, a connecting column and a gasket, the connecting column extends into the arc-shaped limiting hole, the connecting column is threadedly connected to the nut, the connecting column is fixedly connected to the housing, and the gasket is sleeved on the connecting column and is located between the nut and the limiting piece.

[0016] With the above technical solution, the user can loosen the nut on the connecting column, so that the gasket and the limiting piece are separated from each other, thereby enabling the drive assembly to rotate on the housing. After adjusting to the required angle, the nut is tightened on the connecting column again, so that the gasket and the limiting piece are in contact, and the drive assembly is fixed; the user only needs to adjust the relative positions of the gasket and the limiting piece through the nut, making the angle adjustment of the drive assembly very convenient.

[0017] Further, a grip portion is provided on the outer shell, a button is provided on the grip portion, the driving device includes a power source, a driving motor and a gear set, the power source is electrically connected to the driving motor and the button, the output end of the driving motor is connected to the gear set, a transmission shaft extending out of the outer shell is connected to the gear set, and the transmission shaft is in transmission connection with the driven gear.

[0018] With the above technical solution, after the user presses the button to start the power source, the driving motor starts to work, drives the gear set to rotate through the output end, the driving force is transmitted to the driven gear through the transmission shaft, so that the driven gear rotates and drives the circular saw blade to rotate. The user can hold the grip portion with both hands to operate the circular saw; the user only needs to press the button to use the circular saw for cutting, which is very convenient to use; and the power source, the driving motor and the gear set are all arranged inside the outer shell, making the overall structure of the drive assembly very compact, greatly reducing the volume of the circular saw, and making it very convenient to use and carry.

[0019] Further, a water spraying device is also provided on the housing, the water spraying device is located within the contour range of the circular saw blade, a water spraying port is provided on the water spraying device, and the water spraying port faces the driven gear or the circular saw blade.

[0020] With the above technical solution, when the circular saw cuts materials such as concrete and wood, extremely high temperatures will be generated due to friction, resulting in an increase in the temperatures of the circular saw blade and the driven gear during operation. The water spraying device can spray water or other cooling liquids through the water spraying port onto the circular saw blade and the driven gear for cooling, avoiding the influence of the deformation of the circular saw blade and the driven gear due to high temperature on the working stability of the circular saw.

[0021] Further, protective baffles are provided at both ends of the housing, and the protective baffles can adjust the angles on the housing.

[0022] With the above technical solution, the setting of the protective baffles can block certain material residues, flying chips, etc. generated during the operation of the circular saw, avoiding the harm caused by flying stones and broken materials splashed during the operation of the circular saw to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0024] Figure 1 Schematic diagram of the overall structure of the present invention;

[0025] Figure 2 One of the schematic diagrams of the partial structure of the present invention;

[0026] Figure 3 Another schematic diagram of the partial structure of the present invention;

[0027] Figure 4 Exploded view of the drive assembly of the present invention;

[0028] Figure 5 Schematic diagram of the structure of the circular saw blade of the present invention;

[0029] Figure 6 Schematic diagram of the structure of the driven gear of the present invention;

[0030] Figure 7 Schematic diagram of the structure of the locking device of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the water spraying device of the present invention;

[0032] Figure 9 Cross-sectional view of the circular saw blade and the driven gear of the present invention in engagement;

[0033] The reference numeral information of the utility model is as follows:

[0034] 1. Drive assembly; 2. Housing; 3. Driving device; 301. Power supply; 302. Driving motor; 303. Gear set; 4. Outer shell; 5. Circular saw blade; 6. Driven gear; 7. Sawtooth ring; 8. Limiting piece; 9. Locking device; 901. Nut; 902. Connecting column; 903. Gasket; 10. Arc-shaped limiting hole; 11. Grip part; 12. Button; 13. Transmission shaft; 14. Water spraying device; 15. Water spraying port; 16. Protective baffle;

[0035] The realization of the purpose, functional characteristics and advantages of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] Refer to Figures 1 to 9 As shown, a ring saw with stable transmission includes a driving assembly 1 and a housing 2 that are rotatably connected. The driving assembly 1 includes a driving device 3 and a housing 4. The driving device 3 is located inside the housing 4. The front end of the housing 2 is rotatably connected to a ring saw blade 5. The ring saw blade 5 is driven to rotate by the driving device 3. A driven gear 6 is also provided inside the housing 2. The driven gear 6 is in transmission connection with the driving device 3. A sawtooth ring 7 is provided inside the ring saw blade 5. The sawtooth ring 7 meshes with the driven gear 6. When the driving device 3 on the driving assembly 1 is started, the driven gear 6 is driven to rotate, and the ring saw blade 5 is driven to rotate through the sawtooth ring 7 that meshes with the driven gear 6. The user can then use the ring saw to cut materials such as concrete and wood. The ring saw of the present utility model transmits the driving force through the mutually meshing sawtooth ring 7 and the driven gear 6, thereby driving the ring saw blade 5 to cut materials such as concrete and wood. The tightly meshing driven gear 6 and the ring saw blade 5 effectively avoid the slippage between the saw blade and the transmission mechanism of the traditional ring saw, greatly ensuring the operation safety of the user.

[0040] Refer to Figure 1 、 2, as shown in Figs. 9, the thickness of the driven gear 6 is greater than that of the annular saw blade 5. The greater thickness of the driven gear 6 makes the tooth surfaces of the driven gear 6 and the sawtooth ring 7 mesh more closely, and also makes the driven gear 6 very stable as a whole when it is driven.

[0041] Refer to Figure 1 , 2 , as shown in Figs. 9, the driven gear 6 is a spur gear, and the spur gear and the annular saw blade 5 are in the same plane. The spur gear and the annular saw blade 5 being in the same plane makes the force at the connection between the spur gear and the annular saw blade 5 very balanced, avoiding uneven force between the meshing tooth surfaces due to relative displacement of the positions of the spur gear and the annular saw blade 5, thus causing the spur gear or the annular saw blade 5 to swing, tooth surface fracture, etc.

[0042] Refer to Figure 1 , 3 As shown in Figs., a limiting piece 8 is fixedly connected to the outer shell 4, the limiting piece 8 is rotatably connected to the housing 2, a locking device 9 is connected to the housing 2, and an arc-shaped limiting hole 10 for the locking device 9 to extend into and fit is provided on the limiting piece 8. The user can change the angle of the drive assembly 1 relative to the housing 2 by changing the relative positions of the locking device 9 and the arc-shaped limiting hole 10, so that the user can very conveniently change different holding postures, facilitating the user to use the circular saw for cutting operations in different working scenarios.

[0043] Refer to Figure 1 , 3 As shown in Figs., the number of the arc-shaped limiting holes 10 on the limiting piece 8 is two, and the rotation centers of the two arc-shaped limiting holes 10 are the same; the number of the locking devices 9 on the housing 2 is two, and the two locking devices 9 are respectively inserted into the two arc-shaped limiting holes 10. The same rotation centers of the two arc-shaped limiting holes 10 make it very labor-saving for the user to adjust the angle of the drive assembly 1 relative to the housing 2 and more convenient to use; the two locking devices 9 being respectively inserted into the two arc-shaped limiting holes 10 makes the force between the locking device 9 and the limiting piece 8 more balanced and the overall structure more stable.

[0044] Refer to Figure 1 , 7As shown, the locking device 9 includes a nut 901, a connecting column 902, and a gasket 903. The connecting column 902 extends into the arc-shaped limiting hole 10. The connecting column 902 is threadedly connected to the nut 901. The connecting column 902 is fixedly connected to the housing 2. The gasket 903 is sleeved on the connecting column 902 and is located between the nut 901 and the limiting piece 8. The user can loosen the nut 901 on the connecting column 902 so that the gasket 903 and the limiting piece 8 are separated from each other, thereby allowing the drive assembly 1 to rotate on the housing 2. After adjusting to the required angle, the nut 901 is tightened on the connecting column 902 so that the gasket 903 and the limiting piece 8 are in contact, and the drive assembly 1 is fixed. The user only needs to adjust the relative position of the gasket 903 and the limiting piece 8 through the nut 901, making the angle adjustment of the drive assembly 1 very convenient.

[0045] Refer to Figures 1 to 4 As shown, a grip portion 11 is provided on the outer shell 4, and a button 12 is provided on the grip portion 11. The driving device 3 includes a power source 301, a driving motor 302, and a gear set 303. The power source 301 is electrically connected to the driving motor 302 and the button 12. The output end of the driving motor 302 is connected to the gear set 303. A transmission shaft 13 extending out of the outer shell 4 is connected to the gear set 303. The transmission shaft 13 is in transmission connection with the driven gear 6. After the user presses the button 12 to start the power source 301, the driving motor 302 starts to work, drives the gear set 303 to rotate through the output end, and the driving force is transmitted to the driven gear 6 through the transmission shaft 13, causing the driven gear 6 to rotate and driving the circular saw blade 5 to rotate. The user can hold the grip portion 11 with both hands to operate the circular saw. The user only needs to press the button 12 to use the circular saw for cutting, which is very convenient to use. Moreover, the power source 301, the driving motor 302, and the gear set 303 are all arranged inside the outer shell 4, making the overall structure of the drive assembly 1 very compact, greatly reducing the volume of the circular saw, and making it very convenient to use and carry.

[0046] Preferably, the power source 301 is a power plug, which is convenient for connecting to other power sources.

[0047] Refer to Figure 1 、 2 As shown in FIGS. 、8, a water spraying device 14 is further provided on the housing 2. The water spraying device 14 is located within the contour range of the circular saw blade 5. A water spraying port 15 is provided on the water spraying device 14, and the water spraying port 15 faces the driven gear 6 or the circular saw blade 5. When the circular saw cuts materials such as concrete and wood, extremely high temperatures will be generated due to friction, resulting in an increase in the temperatures of the circular saw blade 5 and the driven gear 6 during operation. The water spraying device 14 can spray water or other cooling liquids through the water spraying port 15 onto the circular saw blade 5 and the driven gear 6 for cooling, avoiding the deformation of the circular saw blade 5 and the driven gear 6 due to high temperatures and affecting the working stability of the circular saw.

[0048] Preferably, the number of the water spraying devices 14 on the housing 2 is two, and the two water spraying devices 14 are respectively arranged on both sides of the driven gear 6, and at least one water spraying port 15 of the driven gear 6 and the annular saw blade 5 is aligned.

[0049] Refer to Figures 1 to 2 As shown, protective baffles 16 are arranged at both ends of the housing 2, and the protective baffles 16 can adjust the angles on the housing 2. The arrangement of the protective baffles 16 can block certain material residues, flying chips, etc. generated during the annular saw operation, and avoid the flying stones, broken materials, etc. splashed during the annular saw operation from hurting the user.

[0050] When the present utility model is in use, after the user presses the button 12 to start the power supply 301, the drive motor 302 starts to work, drives the gear set 303 to rotate through the output end, and the driving force is transmitted to the driven gear 6 through the transmission shaft 13, so that the driven gear 6 rotates, drives the annular saw blade 5 to rotate. At the same time, the water spraying device 14 sprays water or other cooling liquid onto the annular saw blade 5 and the driven gear 6 through the water spraying port 15 for cooling, and the user can conveniently and quickly use the annular saw to cut materials such as concrete and wood.

[0051] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the specification and drawings of the present utility model under the inventive concept of the present utility model, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A ring saw with stable transmission, comprising a rotatably connected drive assembly (1) and a housing (2), wherein the drive assembly (1) comprises a drive device (3) and a housing (4), wherein the drive device (3) is located in the housing (4), and a ring saw blade (5) is rotatably connected to the front end of the housing (2), and the ring saw blade (5) is driven to rotate by the drive device (3), characterized in that: A driven gear (6) is also arranged in the housing (2), and the driven gear (6) is transmission-connected to the driving device (3); a sawtooth ring (7) is arranged in the ring saw blade (5), and the sawtooth ring (7) is meshed with the driven gear (6).

2. A ring saw with stable transmission according to claim 1, characterized in that: The thickness of the driven gear (6) is greater than the thickness of the ring saw blade (5).

3. A ring saw with stable transmission according to claim 2, characterized in that: The driven gear (6) is a spur gear, and the spur gear and the ring saw blade (5) are located on the same plane.

4. A ring saw with stable transmission according to claim 1, 2 or 3, characterized in that: A limiting plate (8) is fixedly connected to the outer shell (4), the limiting plate (8) is rotatably connected to the shell (2), a locking device (9) is connected to the shell (2), and an arc-shaped limiting hole (10) is provided on the limiting plate (8) for the locking device (9) to extend into and fit into.

5. A ring saw with stable transmission according to claim 4, characterized in that: The number of the arc-shaped limiting holes (10) on the limiting plate (8) is two, and the rotation centers of the two arc-shaped limiting holes (10) are the same; the number of the locking devices (9) on the housing (2) is two, and the two locking devices (9) are respectively inserted into the two arc-shaped limiting holes (10).

6. A ring saw with stable transmission according to claim 5, characterized in that: The locking device (9) comprises a nut (901), a connecting column (902) and a gasket (903); the connecting column (902) extends into the arc-shaped limiting hole (10); the connecting column (902) and the nut (901) are threadedly connected; the connecting column (902) is fixedly connected to the housing (2); and the gasket (903) is inserted into the connecting column (902) and is located between the nut (901) and the limiting plate (8).

7. A ring saw with stable transmission according to claim 1 or 2 or 3 or 5 or 6, characterized in that: The housing (4) is provided with a handle portion (11), and the handle portion (11) is provided with a button (12). The driving device (3) comprises a power source (301), a driving motor (302) and a gear set (303). The power source (301) is electrically connected to the driving motor (302) and the button (12). The output end of the driving motor (302) is connected to the gear set (303). The gear set (303) is connected to a transmission shaft (13) extending out of the housing (4), and the transmission shaft (13) is transmission-connected to the driven gear (6).

8. A ring saw with stable transmission according to claim 7, characterized in that: The housing (2) is also provided with a water spray device (14), the water spray device (14) is located within the contour of the ring saw blade (5), the water spray device (14) is provided with a water spray port (15), and the water spray port (15) faces the driven gear (6) or the ring saw blade (5).

9. A ring saw with stable transmission according to claim 1 or 2 or 3 or 5 or 6 or 8, characterized in that: Both ends of the shell (2) are provided with protective baffles (16), and the angle of the protective baffles (16) on the shell (2) can be adjusted.

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