Driving wheel and trephine

Abstract

The technical scheme belongs to the technical field of trephine, and particularly relates to a driving wheel and a trephine, the driving wheel is used for driving a trephine blade to operate in a cutting plane, the driving wheel comprises a driving wheel body, the driving wheel body comprises two driving pieces which can be coaxially stacked, and each driving piece is provided with a boss part; annular driving grooves are formed between the adjacent driving pieces in an abutting mode through the boss parts and used for being matched with the side portions of the trephine saw blades in an embedded mode to form contact transmission, the side tooth-shaped structures of the trephine saw blades are accurately embedded into the annular driving grooves to form meshing contact, and after the driving pieces on one side are abraded due to long-term friction, the driving pieces on the other side can not be damaged. The upper driving piece and the lower driving piece are disassembled, changed in position and reassembled, the unworn face of the driving piece originally located on the lower layer is overturned to the upper layer to continue to participate in transmission, the notches in the front side and the back side of the single set of driving pieces can alternately bear transmission loads, and the service life of the driving wheel is prolonged.

Description

TECHNICAL FIELD

[0001] The technical scheme relates to the technical field of ring saws, in particular to a driving wheel and a ring saw. BACKGROUND

[0002] A ring saw is a cutting tool characterized by a ring-shaped saw blade, which realizes precise hole cutting or cutting through high-speed rotation of the ring-shaped blade. It is suitable for wood, metal processing and building fields. Modern ring saws are mostly driven by electricity, and can adjust the diameter and speed, and have high efficiency and safety, meeting the needs of precise operation in multiple scenes.

[0003] For example, Chinese patent CN1257438A discloses a driving wheel for eccentrically driving a ring-shaped saw blade in a cutting machine, which includes at least two ring-shaped elements that are separable but fixed together in operation, respectively referred to as a fixed disc and a driving ring. The driving ring has a ring-shaped driving groove for the inner edge of the saw blade, and is arranged radially outside the central part of the fixed disc.

[0004] The existing ring saw driving wheel is driven by friction through a V-shaped notch with the ring saw. The driving wheel and the ring saw are in long-term high-pressure and high-speed sliding friction working conditions. The bevel notch is prone to wear and deformation, which leads to a decrease in transmission efficiency and even slipping failure, and is prone to wear, resulting in a short service life. Therefore, it needs to be improved. SUMMARY

[0005] In order to improve the problem that the notch of the driving wheel is easily worn due to high-load friction, resulting in a short service life, the technical scheme provides a driving wheel and a ring saw.

[0006] The purpose of the technical scheme is achieved as follows:

[0007] A driving wheel for driving a ring saw blade to rotate in a cutting plane, comprising a driving wheel, the driving wheel comprising two coaxially stacked driving pieces, each of the driving pieces having a boss portion, and the boss portions of adjacent driving pieces being abutted to form a ring-shaped driving groove, which is used for embedding and matching with the side part of the ring saw blade to form contact transmission.

[0008] Through the above technical scheme, when the driving wheel is in normal use, the two driving wheels are coaxially stacked, the boss portion is rigidly abutted with the rear side surface of the adjacent driving piece, the circumferential side of the boss portion constitutes a ring-shaped driving groove, the groove width for embedding and matching is set according to the boss height of the boss portion, the side tooth structure of the ring saw blade is precisely embedded into the ring-shaped driving groove to form occlusal contact, and after the unilateral driving piece is worn due to long-term friction, the upper and lower driving pieces are disassembled and exchanged in position to be reassembled, so that the un-worn surface of the driving piece originally in the lower layer is turned over to the upper layer to continue to participate in transmission. The positive and negative side notches of the single driving piece can alternately bear the transmission load, thereby prolonging the service life of the driving wheel.

[0009] Preferably, there are two bosses, and the two bosses on both sides are formed on opposite end faces of the drive plate.

[0010] With the above technical solution, each drive plate has a boss on both sides, so when two drive plates need to be used together, they can be aligned and stacked by choosing the boss on the same side during assembly. When the boss on one side is worn, the drive plate can be disassembled and flipped to the unused boss on the other side for reassembly, thus forming an annular drive groove and achieving the effect of extending service life.

[0011] Preferably, the drive plate has an inclined annular surface one, which is inclined toward the protrusion portion, so that the annular drive groove is flared outward.

[0012] With the above technical solution, when the two drive blades are stacked coaxially, the inclined annular surfaces of the adjacent drive blades cooperate to form an outwardly expanding annular drive groove. The flared opening facilitates the guidance of the ring saw blade and improves drive stability.

[0013] Preferably, the driving plate further has an inclined annular surface two, which is disposed on the side of the driving plate opposite to the inclined annular surface one.

[0014] Through the above technical solution, the inclined annular surface 2, in conjunction with the inclined direction of the inclined annular surface 1, further expands the size of the flare at the flare, and the groove is more adapted to the shape of the ring saw, further improving the driving stability.

[0015] Preferably, each of the drive plates has a shaft hole for matching with the brake shaft.

[0016] With the above technical solution, the shaft holes on each drive plate are passed through by the brake shaft for fixed connection. During operation, the brake shaft transmits the driving torque to each drive plate, thereby driving the drive plate to continue to operate.

[0017] Preferably, each of the drive plates has a fixing hole for passing through the connector to fix each of the drive plates.

[0018] The above technical solution aligns the fixing holes of each drive plate and locks them with bolts to form a rigid connection, preventing relative displacement during synchronous rotation, improving the ultimate torque bearing capacity of the drive wheel, and enhancing the stability of the connection.

[0019] A ring saw includes a housing, a ring saw blade mounted on the front side of the housing, the ring saw blade being rotatably connected relative to the housing, the housing having a cavity, and a mounting hole corresponding to the housing, and further includes a drive wheel as described in any of the above claims, and further includes:

[0020] A ring saw drive unit is installed on the rear side of the housing and is used to drive the drive wheel to rotate;

[0021] A brake shaft is rotatably disposed relative to the housing. The lower end of the brake shaft passes through the housing cavity and is connected to the output end of the ring saw drive. The upper end of the brake shaft passes through the shaft hole.

[0022] The brake shaft has a connecting hole, which is connected to a fixing member, so that the drive wheel and the brake shaft are coaxially fixed. The ring saw drive member drives the brake shaft to rotate, so that the drive wheel rotates synchronously, thereby driving the ring saw blade to rotate.

[0023] Through the above technical solution, the coordinated design of the ring saw drive component and the brake shaft achieves efficient power transmission. The torque output by the drive component is input through the lower end of the brake shaft. After the upper end of the brake shaft passes through the drive wheel shaft hole, the brake shaft and the drive wheel are firmly connected by the fixing component to ensure accurate alignment of power transmission. The drive wheel rotates rigidly and synchronously with the brake shaft through the fixing component, driving the ring saw blade to achieve stable cutting motion.

[0024] Preferably, the brake shaft is provided with a disc, and the bolt head end of the fixing member presses against the disc, and the elasticity of the disc causes the stacked discs to tend to press against each other.

[0025] Through the above technical solution, an elastic disc is set at the end of the brake shaft. During assembly, an axial preload is applied to the bolt head of the fixing component to press the disc. The elastic restoring force generated by the deformation of the disc keeps the stacked drive plates in a continuous pressing state, further improving the stability of the cooperation of multiple drive plates.

[0026] Preferably, the housing has an installation port that communicates with the housing cavity, and the installation port is provided with an installation cover.

[0027] The above technical solution involves opening an installation port that communicates with the housing cavity on the side wall of the housing and configuring an openable and closable installation cover to facilitate the assembly and maintenance of the brake shaft assembly, thereby improving the installation capability and maintainability of the equipment.

[0028] Preferably, the mounting cover is provided with a mounting part, and a mounting groove is formed on the inner side of the mounting part. A bearing component is installed in the mounting groove, and the bearing component abuts against the inner sidewall of the mounting groove and is sleeved on the end of the brake shaft.

[0029] The brake shaft is also fitted with bearing component two and bearing component three. Bearing component two abuts against the inner wall of the mounting hole. The inner wall of the mounting hole also has a protruding abutment for restricting bearing component two from disengaging. The housing has a slot. One side of bearing component three has a protruding ring for embedding into the slot. The other side of bearing component three is used to guide the drive plate.

[0030] Through the above technical solution, bearing component one is embedded in the mounting groove inside the mounting cover and is sleeved on the end of the brake shaft to form a radial support reference; bearing component two is embedded in the mounting hole of the housing and is axially limited by the abutment part. Bearing components one and two control axial movement and wobble, reducing the risk of brake shaft running off-center; bearing component three is locked to the housing groove through the convex ring part, and its guide end face contacts the side of the drive plate. The three-stage bearing assembly forms a composite support system. The collaborative design of the multi-stage bearing assembly realizes high-precision positioning and stable operation of the brake shaft.

[0031] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0032] 1. This technical solution uses a coaxially flip-out dual drive plate design to allow the drive plate position to be quickly changed after the transmission working surface of the annular drive groove is worn on one side. The unworn surface continues to bear the load, realizing double-sided alternating transmission, reducing the limitation of single-sided wear, and extending the overall life of the drive wheel through the symmetrical reuse structure, thereby reducing the replacement frequency and maintenance costs.

[0033] 2. This technical solution achieves the double-sided reuse function of the drive plates by having bosses on each drive plate, with the bosses rigidly abutting to form an annular drive groove structure. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0035] Figure 2 This is a partial cross-sectional view of Example 1;

[0036] Figure 3 As in Example 1 Figure 2 Enlarged view of a portion;

[0037] Figure 4 This is a partial structural diagram of the ring saw blade in Example 1, with the rest of the blade hidden.

[0038] Figure 5 As in Example 1 Figure 4 Schematic diagram of a partial explosion;

[0039] Figure 6 This is a schematic diagram of the overall structure of the drive wheel in Example 1;

[0040] Figure 7 This is a partial explosion diagram of the drive wheel in Example 1;

[0041] Figure 8 This is a schematic diagram of the overall structure of the driver chip in Example 2.

[0042] Reference numerals in the attached diagram: 1. Drive wheel; 11. Drive blade; 3. Annular drive groove; 4. Boss; 51. Inclined annular surface one; 52. Inclined annular surface two; 6. Shaft hole; 7. Fixing hole; 8. Housing; 9. Ring saw blade; 10. Housing cavity; 12. Mounting hole; 13. Ring saw drive component; 14. Brake shaft; 15. Connecting hole; 16. Fixing component; 17. Disc; 18. Mounting port; 19. Mounting cover; 20. Mounting part; 21. Mounting groove; 22. Bearing component one; 23. Bearing component two; 24. Bearing component three; 25. Abutment part; 26. Slot; 27. Protruding ring. Detailed Implementation

[0043] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0044] Example 1:

[0045] See Figure 6 and Figure 7 A drive wheel is used to drive a ring saw blade 9 to rotate in a cutting plane. It includes a drive wheel 1, which includes at least two drive blades 11. In this embodiment, two drive blades 11 are shown. The two drive blades 11 can be stacked coaxially. Each drive blade 11 has a shaft hole 6. When the two drive blades 11 are stacked, the positions of the shaft holes 6 can be aligned accordingly. Each drive blade 11 has two fixing holes 7. The two fixing holes 7 are located on opposite sides of the corresponding drive blade 11 along the shaft hole 6. They are used to connect the drive blades with bolts, nuts or other fasteners 16 for connection, so that the two drive blades 11 are fixed to each other.

[0046] The drive wheel 1 has an annular drive groove 3. Each drive blade 11 has a boss 4, which protrudes from one side end face of each drive blade 11. The annular drive groove 3 is formed between the periphery of the boss 4 and the end face of the drive blade 11, so that when two drive blades 11 are stacked, the annular drive groove 3 between adjacent drive blades 11 can fit into the side part of the ring saw blade 9 to form a contact transmission.

[0047] The drive plate 11 has an inclined annular surface 51 and an inclined annular surface 52. The two inclined annular surfaces are distributed on opposite end faces of the corresponding drive plate 11. The inclined direction of the two inclined annular surfaces causes the thickness of the edge of the drive plate 11 to gradually decrease outward. When the two drive plates 11 are stacked, the boss 4 abuts against the inclined annular surface 51 of the drive plate 11 on the side being used, and cooperates with the inclined annular surface 52 of the other drive plate 11 on the side being abutted. The inclined directions are opposite, so that the annular drive groove 3 is flared outward away from the groove opening of the boss 4.

[0048] The specific work process of this plan is as follows:

[0049] This technical solution uses a drive wheel 1 composed of two coaxially stacked drive plates 11. An annular drive groove 3 is formed between the two drive plates 11 through a boss 4. The side tooth structure of the ring saw blade 9 is precisely embedded in the annular drive groove 3 to form a meshing contact. This allows the upper and lower drive plates 11 to be disassembled, swapped, and reassembled after one side of the drive plate 11 wears out due to long-term friction. This allows the unworn surface of the drive plate 11 that was originally in the lower layer to be flipped to the upper layer to continue participating in the transmission. The grooves on both sides of a single set of drive plates 11 can alternately bear the transmission load, extending the service life of the drive wheel 1.

[0050] See Figure 1 A ring saw includes a housing 8, a ring saw blade 9 mounted on the front side of the housing 8, the ring saw blade 9 being rotatably connected relative to the housing 8, and a ring saw drive 13 mounted on the rear side of the housing 8. The ring saw drive 13 is preferably a motor, which is connected to power via a power plug and is used to drive the ring saw blade 9 located on the front side to operate for cutting.

[0051] See Figure 2 and Figure 3 The housing 8 has a cavity 10 inside. The housing 8 is provided with an installation port 18, which is connected to the cavity 10. An installation cover 19 is installed at the installation port 18. The installation cover 19 is connected to the housing 8 by bolts, which closes the installation port 18. Removing the installation cover 19 can open the installation port 18 and open the cavity 10.

[0052] The mounting cover 19 has a mounting part 20, which protrudes from the side of the mounting cover 19 facing the housing cavity 10. The mounting part 20 has a corresponding mounting groove 21 formed inside. A bearing component 22 is installed in the mounting groove 21, and the outer wall of the bearing component 22 is engaged with the inner peripheral wall of the mounting groove 21. A brake shaft 14 is installed in the housing cavity 10 and is rotatably arranged relative to the housing cavity 10. The lower end of the brake shaft 14 is adapted to the inner hole of the bearing component 22, so that the bearing component 22 is sleeved on the brake shaft 14. The housing cavity 10 also has a mounting hole 12 on the side wall of the housing 8, which is opened in the housing cavity 10 on the side opposite to the mounting opening 18. The upper end of the brake shaft 14 passes through the mounting hole 12.

[0053] Mounting hole 12 has a limiting part protruding along its inner peripheral wall. Brake shaft 14 is fitted with bearing part 23. The outer side of bearing part 23 abuts against the inner peripheral wall of mounting hole 12. The limiting part is located on the side of bearing part 23 near housing cavity 10 and is used to restrict the axial movement of bearing part 23. Bearing part 23 guides the rotation of brake shaft 14.

[0054] See Figure 4 and Figure 5The housing 8 is also provided with a slot 26, which is an annular groove. It is located on one end face of the housing 8 where the mounting hole 12 is located, and surrounds the mounting hole 12. The brake shaft 14 is also fitted with a bearing component 24, which can be a flat bearing, such as... Figure 3 As shown, a protruding ring 27 protrudes from one end face of bearing component 24. Its shape and size are adapted to the slot 26. Bearing component 24 is positioned by embedding the protruding ring 27 into the slot 26. The guide surface on the other side of bearing component 24 can guide the drive wheel 1 to rotate.

[0055] Align the shaft hole 6 of the drive wheel 1 with the position of the brake shaft 14. The brake shaft 14 passes through the shaft holes 6 of the two drive plates 11. The brake shaft 14 is provided with a disc 17. The disc 17 is sleeved on the brake shaft 14 through the inner hole and abuts against the drive plate 11 located on the outer side. A connecting hole 15 is opened on the end face of the brake shaft 14 away from the bottom of the mounting groove 21. A fixing member 16 is installed in the connecting hole 15. The fixing member 16 is preferably a bolt. The fixing member 16 can be threaded into the connecting hole 15, so that the bolt head of the fixing member 16 abuts against the disc 17. By pressing the disc 17, the elasticity of the disc 17 makes the two stacked discs tend to press against each other, thereby realizing the synchronous fixation of the drive wheel 1 and the brake shaft 14. When the ring saw drive member 13 drives the brake shaft 14 to rotate through the transmission component, it drives the drive wheel 1 to rotate synchronously, thereby driving the ring saw blade 9 to run for cutting.

[0056] The specific work process of this plan is as follows:

[0057] This technical solution achieves efficient power transmission through the coordinated design of the ring saw drive component 13 and the brake shaft 14. The torque output by the drive component is input through the lower end of the brake shaft 14. After the upper end of the brake shaft 14 passes through the shaft hole 6 of the drive wheel 1, the brake shaft 14 and the drive wheel 1 are firmly connected by the fixing component 16 to ensure accurate alignment of power transmission. The drive wheel 1 rotates rigidly and synchronously with the brake shaft 14 through the fixing component 16, driving the ring saw blade 9 to achieve stable cutting motion.

[0058] Example 2:

[0059] See Figure 8 The structure of the drive wheel 1 differs from that of embodiment 1 in that each drive blade 11 has a boss 4 on each of its two end faces. The two bosses 4 protrude one-to-one from the end faces of the opposite sides of the drive blade 11, so that when the drive blade 11 flips over to abut against the other drive blade 11, an annular drive groove 3 that is compatible with the ring saw blade 9 can be formed.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A drive wheel for driving a ring saw blade in a cutting plane, characterized in that: It includes a drive wheel (1), which includes two drive plates (11) that can be stacked coaxially. Each drive plate (11) has a boss (4). An annular drive groove (3) is formed between adjacent drive plates (11) through the boss (4) to fit into the side part of the ring saw blade to form a contact transmission.

2. A drive wheel according to claim 1, characterized in that: The boss (4) is provided in two parts, and the boss (4) on both sides is formed on the opposite end faces of the drive piece (11) in a one-to-one correspondence.

3. A drive wheel according to claim 1 or 2, characterized in that: The drive plate (11) has an inclined annular surface (51) that is inclined toward the protrusion (4), so that the annular drive groove (3) is flared outward.

4. A drive wheel according to claim 3, characterized in that: The drive plate (11) also has an inclined annular surface two (52), which is disposed on the side of the drive plate (11) away from the inclined annular surface one (51).

5. A drive wheel according to claim 1, characterized in that: Each drive plate (11) has a shaft hole (6) for matching with the brake shaft (14).

6. A drive wheel according to claim 1, characterized in that: Each of the drive pieces (11) has a fixing hole (7) for passing through the connector to fix each of the drive pieces (11).

7. A ring saw, comprising a housing (8), wherein a ring saw blade (9) is mounted on the front side of the housing (8), the ring saw blade (9) being rotatably connected relative to the housing (8), the housing (8) having a cavity (10), and the cavity (10) having a mounting hole (12) corresponding to the housing (8), characterized in that, It also includes a drive wheel as described in any one of claims 1 to 6, further comprising: A ring saw drive unit (13) is installed on the rear side of the housing (8) and is used to drive the drive wheel (1) to rotate; Brake shaft (14) is rotatably disposed relative to the housing (8). The lower end of the brake shaft (14) passes through the housing cavity (10) and is connected to the output end of the ring saw drive (13). The upper end of the brake shaft (14) passes through the shaft hole (6). The brake shaft (14) has a connecting hole (15) and a fixing member (16) is connected to the connecting hole (15), so that the drive wheel (1) is coaxially fixed with the brake shaft (14). The ring saw drive member (13) drives the brake shaft (14) to rotate, so that the drive wheel (1) rotates synchronously, thereby driving the ring saw blade (9) to operate.

8. A ring saw according to claim 7, characterized in that: The brake shaft (14) is provided with a disc (17), and the bolt head of the fixing member (16) presses against the disc (17). The elasticity of the disc (17) makes each stacked piece tend to press against each other.

9. A ring saw according to claim 7, characterized in that: The housing (8) has an installation port (18) that communicates with the housing cavity (10), and the installation port (18) is provided with an installation cover (19).

10. A ring saw according to claim 9, characterized in that: The mounting cover (19) is provided with a mounting part (20), and a mounting groove (21) is formed on the inner side of the mounting part (20). A bearing component (22) is installed in the mounting groove (21). The bearing component (22) abuts against the inner wall of the mounting groove (21) and is sleeved on the end of the brake shaft (14). The brake shaft (14) is also fitted with a bearing component two (23) and a bearing component three (24). The bearing component two (23) abuts against the inner wall of the mounting hole (12). The inner wall of the mounting hole (12) also has a protruding abutment part (25) to restrict the bearing component two (23) from disengaging. The housing (8) has a slot (26). One side of the bearing component three (24) has a protruding ring part (27) for embedding into the slot (26). The other side of the bearing component three (24) is used to guide the drive plate (11).

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