Slotting machine

Abstract

This utility model discloses a grooving machine, including a motor, a primary transmission mechanism, and a secondary transmission mechanism. The motor has an output shaft. The primary transmission mechanism includes an intermediate shaft and a primary gear structure, with the central axes of the intermediate shaft and the output shaft intersecting. The primary gear structure drivesly connects the output shaft and the intermediate shaft. The secondary transmission mechanism includes a transmission shaft and a secondary gear structure, with the secondary gear structure drivingly connecting the intermediate shaft and the transmission shaft. The transmission shaft is used to drive the working head, and its central axis is parallel to the central axis of the intermediate shaft. The central axes of the output shaft, the intermediate shaft, and the transmission shaft are coplanar. This increases the output torque, extends the service life of the grooving machine, and increases the grooving depth, thereby expanding the application range of the grooving machine.

Description

Technical Field

[0001] This utility model relates to the field of grooving machine technology, and in particular to a grooving machine. Background Technology

[0002] A grooving machine is a power tool specifically designed to cut grooves of specific widths and depths in various materials (such as walls, floors, stone, metal, and wood). It is widely used in construction, decoration, pipe laying, and wiring installation (e.g., grooving walls for electrical wiring, grooving floors for water pipes, and grooving stone for splicing). Existing grooving machines typically use a single-stage bevel gear drive. This structure not only limits the output torque and cutting depth, restricting the machine's application range, but also results in a shorter lifespan. Utility Model Content

[0003] The main purpose of this utility model is to propose a grooving machine that aims to solve the problems of limited application range and short overall life of existing grooving machines due to their transmission structure.

[0004] To achieve the above objectives, this utility model proposes a grooving machine, comprising: a motor having an output shaft; a primary transmission mechanism including an intermediate shaft and a primary gear structure, wherein the central axes of the intermediate shaft and the output shaft are intersecting, and the primary gear structure drivesly connects the output shaft and the intermediate shaft; and a secondary transmission mechanism including a transmission shaft and a secondary gear structure, wherein the secondary gear structure drivesly connects the intermediate shaft and the transmission shaft, the transmission shaft being used to drively connect a working head, and its central axis being parallel to the central axis of the intermediate shaft; the central axes of the output shaft, the intermediate shaft, and the transmission shaft are coplanar.

[0005] Optionally, the primary gear structure includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is sleeved on the outer periphery of the output shaft and can rotate coaxially with the output shaft. The second bevel gear is sleeved on the outer periphery of the intermediate shaft and can drive the intermediate shaft to rotate coaxially.

[0006] Optionally, the secondary gear structure includes a first spur gear and a second spur gear that mesh with each other. The first spur gear is sleeved on the outer periphery of the intermediate shaft and can rotate coaxially with the intermediate shaft. The second spur gear is sleeved on the outer periphery of the transmission shaft and can drive the transmission shaft to rotate coaxially.

[0007] Optionally, the grooving machine includes a housing having a main housing and a head housing that are connected to each other;

[0008] The motor is located inside the main housing, and the output shaft portion extends into the head housing;

[0009] Both the primary transmission mechanism and the secondary transmission mechanism are located inside the head shell, and the shape of the head shell is adapted to the outer contour of the primary transmission mechanism and the outer contour of the secondary transmission mechanism.

[0010] The drive shaft passes through the head shell and is connected to the working head on the outside of the head shell.

[0011] Optionally, the primary gear structure includes a second bevel gear sleeved on the outer periphery of the intermediate shaft, and the head housing is partially flared outward at the position corresponding to the second bevel gear to avoid obstructing the second bevel gear; and / or,

[0012] The secondary gear structure includes a second spur gear sleeved on the outer periphery of the transmission shaft. The head shell is partially expanded outward at the position corresponding to the second spur gear to avoid the second spur gear.

[0013] Optionally, the head shell has a through hole communicating with its interior, and the drive shaft passes through the through hole into the head shell, with the drive shaft and the through hole having a clearance fit.

[0014] The grooving machine also includes a sealing ring, which is sandwiched between the inner wall of the through hole and the outer wall of the drive shaft.

[0015] Optionally, the grooving machine further includes a dustproof ring, which is close to the working head relative to the sealing ring. The dustproof ring is sleeved on the outer periphery of the drive shaft, and its outer edge forms a labyrinth structure with the head shell.

[0016] Optionally, the drive shaft includes a first end and a second end opposite to each other, the first end passing through the head shell and connected to the working head outside the head shell;

[0017] The grooving machine also includes:

[0018] A first bearing is disposed near the first end, with its inner ring fitted around the outer periphery of the drive shaft and its outer ring fixed to the inner wall of the head shell; and,

[0019] The second bearing is located near the second end, with its inner ring fitted around the outer circumference of the drive shaft and its outer ring fixed to the inner wall of the head shell.

[0020] Optionally, the secondary gear structure includes a second spur gear sleeved on the outer periphery of the transmission shaft;

[0021] The grooving machine also includes a washer, which is sleeved on the outer periphery of the drive shaft and sandwiched between the second spur gear and the first bearing.

[0022] Optionally, the head shell includes a shell and a cover, which are spliced ​​together along the axial direction of the intermediate shaft;

[0023] The grooving machine also includes a sealing ring, which is located at the joint between the housing and the cover.

[0024] The drive shaft passes through the cover and is connected to the working head on the outside of the cover.

[0025] The technical solution provided by this utility model has at least the following advantages:

[0026] The grooving machine provided by this utility model includes a motor, a primary transmission mechanism, and a secondary transmission mechanism. The central axes of the intermediate shaft of the primary transmission mechanism and the transmission shaft of the secondary transmission mechanism are arranged in parallel, and their central axes intersect with the central axis of the output shaft of the motor. The primary gear structure drives the output shaft and the intermediate shaft, and the secondary gear structure drives the intermediate shaft and the transmission shaft. The transmission shaft is used to drive the working head. By setting this gear transmission mechanism, the overall transmission ratio of the gear mechanism can be increased, thereby reducing the speed of the transmission shaft and increasing the output torque. The central axes of the output shaft, intermediate shaft, and transmission shaft are arranged in a coplanar manner, which allows the primary and secondary gear structures to be better aligned, reducing additional stress, wear, or energy loss caused by axis misalignment, thereby ensuring the stability and efficiency of the transmission. Furthermore, the overall transmission ratio of the gear mechanism in this solution is allocated to the secondary gear transmission structure. Therefore, compared with the primary gear transmission of the prior art, the transmission ratio allocated to each stage of the gear transmission in this solution is smaller, thereby reducing the diameter difference between the large and small gears in each stage of the gear transmission. In this way, the diameter of the pinion can be increased, thereby extending its service life and consequently the service life of the grooving machine. At the same time, the diameter of the large gear can be reduced, especially the diameter of the large gear in the two-stage gear structure. This reduces the distance from the central axis of the drive shaft to the outer edge of the head housing, which in turn increases the distance from the outer edge of the working head to the outer edge of the head housing. This increases the grooving depth and expands the application range of the grooving machine. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 A schematic diagram of an embodiment of a grooving machine provided by this utility model;

[0029] Figure 2 for Figure 1 The grooving machine is shown in a cross-sectional view along AA.

[0030] Figure 3 for Figure 1 The structural diagram of the grooving machine regarding the transmission connection between the first transmission structure and the second transmission mechanism (hidden head shell);

[0031] Figure 4 for Figure 1 A schematic diagram of the grooving machine with respect to the head shell;

[0032] Figure 5 for Figure 1 A cross-sectional view of the grooving machine with respect to the first transmission structure and the second transmission mechanism (assembly).

[0033] Explanation of icon numbers:

[0034] 100 Slotting machine; 1 Motor; 11 Output shaft; 2 Primary transmission mechanism; 21 Intermediate shaft; 22 Primary gear structure; 211 Third end; 212 Fourth end; 221 First bevel gear; 222 Second bevel gear; 3 Secondary transmission mechanism; 31 Transmission shaft; 311 First end; 312 Second end; 32 Secondary gear structure; 321 First spur gear; 322 Second spur gear; 4 Working head; 5 Machine housing; 51 Main housing; 52 Head housing; 521 First clearance part; 522 Second clearance part; 523 Housing; 524 Cover; 61 Sealing ring; 62 Dustproof ring; 63 Washer; 64 Sealing ring; 65 Pressure plate; 71 First bearing; 72 Second bearing; 73 Third bearing; 74 Fourth bearing.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] A grooving machine is a power tool specifically designed to cut grooves of specific widths and depths in various materials (such as walls, floors, stone, metal, and wood). It is widely used in construction, decoration, pipe laying, and wiring installation (e.g., grooving walls to bury electrical wires, grooving floors to run water pipes, and grooving stone for splicing).

[0040] In order to extend the service life of the grooving machine 100 and expand its application range, this utility model improves the transmission structure of the grooving machine 100. The specific structure of the grooving machine 100 is described below with reference to the accompanying drawings.

[0041] Please see Figure 1 and Figure 2 The grooving machine 100 includes a housing 5, which has a main housing 51 and a head housing 52 that are connected to each other. The grooving machine 100 also includes a motor 1, a primary transmission mechanism 2, and a secondary transmission mechanism 3. The motor 1 is located inside the main housing 51, and its output shaft 11 partially extends into the head housing 52. Both the primary transmission mechanism 2 and the secondary transmission mechanism 3 are located inside the head housing 52, and the secondary transmission mechanism 3 is connected to the working head 4. The primary transmission mechanism 2 includes an intermediate shaft 21 and a primary gear structure 22. The central axes of the intermediate shaft 21 and the output shaft 11 are intersected, and the primary gear structure 22 is connected to the output shaft 11 and the intermediate shaft 21. The secondary transmission mechanism 3 includes a transmission shaft 31 and a secondary gear structure 32. The secondary gear structure 32 is connected to the intermediate shaft 21 and the transmission shaft 31, and the transmission shaft 31 is used to connect to the working head 4.

[0042] This invention does not impose specific limitations on the type of the working head 4. The working head 4 can be configured as a grinding disc, a saw blade, or other types.

[0043] In this embodiment of the invention, the central axes of the intermediate shaft 21 of the primary transmission mechanism 2 and the transmission shaft 31 of the secondary transmission mechanism 3 are arranged in parallel, and their central axes intersect with the central axis of the output shaft 11 of the motor 1. The primary gear structure 22 drives the output shaft 11 and the intermediate shaft 21, and the secondary gear structure 32 drives the intermediate shaft 21 and the transmission shaft 31. The transmission shaft 31 is used to drive the working head 4. Thus, the output shaft 11 of the motor 1 drives the working head 4 to work through the primary transmission mechanism 2 and the secondary transmission mechanism 3.

[0044] By setting a two-stage gear transmission, the overall transmission ratio of the gear mechanism can be increased, thereby reducing the rotational speed of the transmission shaft 31 and increasing the output torque. This increases the output torque of the grooving machine 100, allowing it to adapt to torque requirements under different working conditions and improving work efficiency. Furthermore, the central axes of the output shaft 11, intermediate shaft 21, and transmission shaft 31 are coplanar, enabling better alignment of the first-stage gear structure 22 and the second-stage gear structure 32. This reduces additional stress, wear, or energy loss caused by shaft misalignment, thus ensuring transmission stability and efficiency.

[0045] The existing grooving machine, when using a single-stage bevel gear drive, has a maximum output torque of 4.5 N·m to 5 N·m. After replacing the single-stage bevel gear drive with a two-stage gear drive, the maximum output torque of the grooving machine 100 can be increased to 6.28 N·m.

[0046] Understandably, in existing technologies, grooving machines typically employ a single-stage gear transmission structure, meaning they achieve transmission through two bevel gears. Since the gear ratio is proportional to their pitch circle diameter, a significant difference in diameter between the two bevel gears is necessary to achieve a given transmission ratio. To achieve this, the diameter of the smaller bevel gear is further reduced, while the diameter of the larger bevel gear is further increased. Because the smaller bevel gear's diameter is too small, its lifespan is short, thus affecting the grooving machine's lifespan. Simultaneously, because the larger bevel gear's diameter is too large, the distance between the outer edge of the headstock and the rotation axis of the larger bevel gear is large, resulting in a smaller distance between the outer edge of the working head and the outer edge of the headstock, further affecting the grooving machine's cutting depth.

[0047] In this embodiment of the invention, the grooving machine 100 is provided with a primary transmission mechanism 2 and a secondary transmission mechanism 3. In this design, the overall transmission ratio of the gear mechanism is allocated to the secondary gear transmission structure. Therefore, compared to the primary gear transmission of the prior art, the transmission ratio allocated to each stage of the gear transmission in this design is smaller, thereby reducing the diameter difference between the large and small gears in each stage. This allows for an increase in the diameter of the small gear, thus extending its service life and consequently extending the service life of the grooving machine 100.

[0048] Taking existing grooving machines as an example, the service life of the gears in existing grooving machines using single-stage bevel gear transmission is typically around 300 hours. After replacing the single-stage bevel gear transmission with a two-stage gear transmission, when the service life test of grooving machine 100 reached 320 hours, only slight wear was observed in the gears. Thus, the service life of grooving machine 100 is significantly extended.

[0049] At the same time, the diameter of the large gear is reduced, especially the diameter of the large gear in the secondary gear structure 32, which reduces the distance from the central axis of the transmission shaft 31 to the outer edge of the head shell 52, and thus increases the distance from the outer edge of the working head 4 to the outer edge of the head shell 52, thereby increasing the grooving depth and expanding the application range of the grooving machine 100.

[0050] Taking existing grooving machines as an example, when using a single-stage bevel gear drive, the cutting depth of the existing grooving machine is between 60mm and 65mm. In this application, by replacing the single-stage bevel gear drive with a two-stage gear drive, the diameter of the large gear decreases, thus increasing the distance from the outer edge of the working head 4 to the outer edge of the head shell 52, and increasing the cutting depth of the grooving machine 100 to 72mm.

[0051] Please see Figure 2 and Figure 3 In one embodiment, the primary gear structure 22 includes a first bevel gear 221 and a second bevel gear 222 that mesh with each other. The first bevel gear 221 is sleeved on the outer periphery of the output shaft 11 and can rotate coaxially with the output shaft 11. The second bevel gear 222 is sleeved on the outer periphery of the intermediate shaft 21 and can drive the intermediate shaft 21 to rotate coaxially.

[0052] As mentioned above, "the central axes of the intermediate shaft 21 and the output shaft 11 are arranged intersectingly." By setting the first bevel gear 221 and the second bevel gear 222, the output shaft 11 and the intermediate shaft 21 are connected by a transmission, thereby realizing the conversion of speed and torque when the axes intersect.

[0053] Furthermore, to achieve the purpose of speed reduction and torque increase, the transmission ratio of the first-stage gear structure 22 is set to be greater than 1. To achieve the predetermined transmission ratio, the diameter of the first bevel gear 221 is set to be smaller than the diameter of the second bevel gear 222, and the number of teeth of the first bevel gear 221 is smaller than the number of teeth of the second bevel gear 222. At this time, the first bevel gear 221 rotates at a high speed, the second bevel gear 222 rotates at a low speed, but the torque increases proportionally.

[0054] This invention does not impose specific limitations on the included angle between the central axis of the intermediate shaft 21 and the central axis of the output shaft 11. Based on the transmission structure of the first bevel gear 221 and the second bevel gear 222, the central axis of the intermediate shaft 21 and the central axis of the output shaft 11 are usually arranged perpendicularly.

[0055] Please see Figure 2 and Figure 3 In one embodiment, the secondary gear structure 32 includes a first spur gear 321 and a second spur gear 322 that mesh with each other. The first spur gear 321 is sleeved on the outer periphery of the intermediate shaft 21 and can rotate coaxially with the intermediate shaft 21. The second spur gear 322 is sleeved on the outer periphery of the transmission shaft 31 and can drive the transmission shaft 31 to rotate coaxially.

[0056] Similarly, to achieve the purpose of speed reduction and torque increase, the transmission ratio of the two-stage gear structure 32 is set to be greater than 1. To achieve the predetermined transmission ratio, the diameter of the first spur gear 321 is set to be smaller than the diameter of the second spur gear 322, and the number of teeth of the first spur gear 321 is smaller than the number of teeth of the second spur gear 322. At this time, the first spur gear 321 rotates at a higher speed, while the second spur gear 322 rotates at a lower speed, but the torque increases proportionally.

[0057] As described above, both the second bevel gear 222 and the first spur gear 321 are fitted onto the intermediate shaft 21, and are spaced apart axially on the intermediate shaft 21. The intermediate shaft 21 has a radially enlarged portion located between the second bevel gear 222 and the first spur gear 321 to axially separate the second bevel gear 222 and the first spur gear 321, ensuring smooth operation of each gear.

[0058] Based on the specific structures of the first-stage gear structure 22 and the second-stage gear structure 32 described above, the transmission paths of the motor 1, the first-stage gear structure 22, and the second-stage gear structure 32 are explained in detail. When the motor 1 is turned on, its output shaft 11 rotates. Through the meshing of the first bevel gear 221 and the second bevel gear 222, the intermediate shaft 21 is driven to rotate. Furthermore, when the intermediate shaft 21 rotates, it can drive the first spur gear 321 to rotate coaxially. Through the meshing of the first spur gear 321 and the second spur gear 322, the transmission shaft 31 is driven to rotate. The transmission shaft 31 is connected to the working head 4 to drive the working head 4 to operate.

[0059] Following on from the previous statement, "Both the primary transmission mechanism 2 and the secondary transmission mechanism 3 are located inside the head housing 52, and the secondary transmission mechanism 3 is connected to the working head 4." Please refer to... Figure 2 and Figure 4 The shape of the head shell 52 is adapted to the outer contour of the primary transmission mechanism 2 and the outer contour of the secondary transmission mechanism 3; wherein, the transmission shaft 31 passes through the head shell 52 and is connected to the working head 4 on the outside of the head shell 52.

[0060] Specifically, please refer to Figure 3 and Figure 4The primary gear structure 22 includes a second bevel gear 222 sleeved on the outer periphery of the intermediate shaft 21. The head shell 52 is partially expanded outward at the position corresponding to the second bevel gear 222 to avoid obstructing the second bevel gear 222. Continuing from the previous point, "In order to achieve the purpose of deceleration and torque increase, the transmission ratio of the primary gear structure 22 is set to be greater than 1, and the diameter of the first bevel gear 221 is smaller than the diameter of the second bevel gear 222." Because the diameter of the second bevel gear 222 is larger, the head shell 52 needs to be partially expanded outward at the position corresponding to the second bevel gear 222, thereby forming a first clearance portion 521 to provide accommodating space for the second bevel gear 222.

[0061] Specifically, please refer to Figure 3 and Figure 4 The secondary gear structure 32 includes a second spur gear 322 sleeved on the outer periphery of the transmission shaft 31. The head shell 52 is partially expanded outward at the position corresponding to the second spur gear 322 to avoid obstructing the second spur gear 322. Continuing from the previous point, "In order to achieve the purpose of deceleration and torque increase, the transmission ratio of the secondary gear structure 32 is set to be greater than 1, and the diameter of the first spur gear 321 is smaller than the diameter of the second spur gear 322." Because the diameter of the second spur gear 322 is larger, the head shell 52 needs to be partially expanded outward at the position corresponding to the second spur gear 322, thereby forming a second clearance portion 522 to provide accommodating space for the second spur gear 322.

[0062] It should be noted that the above two technical features can be configured either individually or simultaneously. Specifically, in one embodiment, the above two technical features are configured simultaneously. That is, the head shell 52 is partially expanded outward at the positions corresponding to the second bevel gear 222 and the second spur gear 322, thereby providing accommodating space for the second bevel gear 222 and the second spur gear 322.

[0063] Continuing from the previous statement that "the drive shaft 31 passes through the head housing 52 and is connected to the working head 4 on the outside of the head housing 52," in order to facilitate the assembly of the drive shaft 31 and not affect its rotation, in one embodiment, please refer to... Figure 5 The head shell 52 has a through hole that connects to its interior. The drive shaft 31 passes through the through hole and is fitted into the head shell 52 with a clearance fit. The grooving machine 100 also includes a sealing ring 61, which is sandwiched between the inner wall of the through hole and the outer wall of the drive shaft 31.

[0064] In this embodiment, a through hole is provided on the head shell 52, and the drive shaft 31 passes through the through hole into the head shell 52. By setting a clearance fit between the drive shaft 31 and the through hole, the drive shaft 31 can rotate smoothly.

[0065] Specifically, please refer to Figure 5The grooving machine 100 also includes a dustproof ring 62, which is close to the working head 4 relative to the sealing ring 61. The dustproof ring 62 is sleeved on the outer periphery of the drive shaft 31 and its outer edge forms a labyrinth structure with the head shell 52.

[0066] In this embodiment, the drive shaft 31 is clearance-fitted with the through hole, meaning a gap is formed between the outer wall of the drive shaft 31 and the inner wall of the through hole. It is understood that to reduce wear on the primary gear structure 22 and the secondary gear structure 32, oil needs to be supplied to them. To prevent oil leakage from the gap, a sealing ring 61 is provided between the outer wall of the drive shaft 31 and the inner wall of the through hole, thereby preventing oil leakage. The sealing ring 61 is positioned close to the interior of the head housing 52 to improve the oil leakage prevention effect.

[0067] Meanwhile, an annular groove is formed on the end face of the head shell 52 near the working head, and the annular groove is arranged around the periphery of the through hole. The dustproof ring 62 has two opposite sides in the radial direction, and the two sides are connected at the ends near the working head 4. The inner side is sleeved on the outer periphery of the drive shaft 31, and the outer side is inserted into the annular groove, so that the dustproof ring 62 forms a labyrinth structure between the periphery of the through hole and the head shell 52, thereby preventing dust from entering the interior of the head shell 52.

[0068] In this embodiment, a dustproof ring 62 and a sealing ring 61 are spaced apart along the axial direction of the drive shaft 31, with the dustproof ring 62 closer to the working head 4 than the sealing ring 61. The dustproof ring 62 prevents external dust from entering the head housing 52, while the sealing ring 61 prevents lubricating oil from leaking out of the head housing 52. Each performs its function to jointly ensure the stable operation of the gear structure within the head housing 52.

[0069] To further stabilize the operation of the secondary gear structure 32, in one embodiment, please refer to... Figure 5 The drive shaft 31 includes a first end 311 and a second end 312, which are opposite to each other. The first end 311 passes through the head shell 52 and is connected to the working head 4 on the outside of the head shell 52.

[0070] The grooving machine 100 also includes a first bearing 71 and a second bearing 72. The first bearing 71 is located near the first end 311, with its inner ring fitted around the outer circumference of the drive shaft 31 and its outer ring fixed to the inner wall of the head shell 52. The second bearing 72 is located near the second end 312, with its inner ring fitted around the outer circumference of the drive shaft 31 and its outer ring fixed to the inner wall of the head shell 52. By providing the first bearing 71 and the second bearing 72, the first end 311 and the second end 312 of the drive shaft 31 are supported respectively, thereby ensuring the stable operation of the two-stage gear structure 32.

[0071] In the above embodiment, the secondary gear structure 32 includes a first spur gear 321 and a second spur gear 322. The first spur gear 321 is sleeved on the outer periphery of the intermediate shaft 21 and can rotate coaxially with the intermediate shaft 21. The second spur gear 322 is sleeved on the outer periphery of the transmission shaft 31 and can drive the transmission shaft 31 to rotate coaxially.

[0072] Since the first spur gear 321 and the second spur gear 322 are respectively fitted onto the outer circumference of the intermediate shaft 21 and the outer circumference of the transmission shaft 31, the first spur gear 321 and the second spur gear 322 are extremely prone to axial misalignment. In one embodiment, please refer to... Figure 5 The grooving machine 100 also includes a washer 63, which is sleeved on the outer periphery of the transmission shaft 31 and sandwiched between the second column gear 322 and the first bearing 71.

[0073] The washer 63 has a considerable thickness. By sandwiching the washer 63 between the second spur gear 322 and the first bearing 71, the washer 63 provides support for the second spur gear 322, ensuring the spacing between the second spur gear 322 and the first bearing 71. In this way, the first spur gear 321 and the second spur gear 322 can be aligned and kept meshed, thereby making the operation of the two-stage gear structure 32 stable.

[0074] Meanwhile, to avoid friction between the second spur gear 322, the first bearing 71, and the washer 63, in one embodiment, the inner rings of the second spur gear 322, the washer 63, and the first bearing 71 are arranged to rotate coaxially with the transmission shaft 31. Thus, the inner rings of the second spur gear 322, the washer 63, and the first bearing 71 are relatively stationary, resulting in no friction between them and reducing wear on the inner rings of the second spur gear 322, the washer 63, and the first bearing 71.

[0075] Following the previous statement that "the outer ring of the first bearing 71 is fixed to the inner wall of the head shell 52," in one embodiment, a countersunk hole is formed in the inner wall of the head shell 52. The central axes of the countersunk hole and the through hole coincide with the central axis of the drive shaft 31, and the countersunk hole and the through hole are adjacent to and interconnected. The inner diameter of the countersunk hole is larger than the inner diameter of the through hole, and a first stepped surface is formed at the connection between the countersunk hole and the through hole. The first bearing 71 is disposed in the countersunk hole and rests on the first stepped surface.

[0076] The inner wall of the head shell 52 is also provided with a retaining hole, and the central axis of the retaining hole and the countersunk hole coincides with the central axis of the transmission shaft 31. The retaining hole is located on the side of the countersunk hole away from the through hole, and the retaining hole and the countersunk hole are adjacent to each other and interconnected. The inner diameter of the retaining hole is larger than the inner diameter of the countersunk hole, and the connection between the retaining hole and the countersunk hole forms a second step surface. In order to prevent the first bearing 71 from moving axially along the transmission shaft 31 during the operation of the secondary gear structure 32, the grooving machine 100 also includes a pressure plate 65. The outer diameter part of the pressure plate 65 is engaged with the retaining hole, and the inner diameter part of the pressure plate 65 abuts against the upper end face of the first bearing 71 to fix the first bearing 71 in the axial direction of the transmission shaft 31.

[0077] This utility model does not impose specific limitations on the pressure plate 65. The pressure plate 65 can be set as a C-shaped pressure ring or as a clamp.

[0078] Similarly, to further stabilize the operation of the first-stage gear structure 22, in one embodiment, please refer to... Figure 5 The intermediate shaft 21 includes a third end 211 and a fourth end 212. The third end 211 is located on the same side as the first end 311, and the fourth end 212 is located on the same side as the second end 312. The grooving machine 100 also includes a third bearing 73 and a fourth bearing 74. The third bearing 73 is located near the third end 211, and its inner ring is fitted around the outer circumference of the intermediate shaft 21, while its outer ring is fixed to the inner wall of the head housing 52. The fourth bearing 74 is located near the fourth end 212, and its inner ring is fitted around the outer circumference of the intermediate shaft 21, while its outer ring is fixed to the inner wall of the head housing 52. By providing the third bearing 73 and the fourth bearing 74, the third end 211 and the fourth end 212 of the intermediate shaft 21 are supported respectively, thereby ensuring the stable operation of the first-stage gear structure 22.

[0079] In one embodiment, please refer to Figure 5 The head shell 52 includes a shell 523 and a cover 524, which are spliced ​​together axially on the intermediate shaft 21. The grooving machine 100 also includes a sealing ring 64, which is located at the splice between the shell 523 and the cover 524. One end of the drive shaft 31 passes through the cover 524 and is connected to the working head 4 on the outside of the cover 524.

[0080] Specifically, a groove is formed on the cover 524, extending circumferentially along the drive shaft 31. When the housing 523 is mated with the cover 524, the housing 523 is partially inserted into the groove. A receiving groove is provided around the groove wall. A sealing ring 64 is fitted onto the groove wall, partially contained within the receiving groove, and pressed against the housing 523. This makes installation of the housing 523 and the cover 524 easier and provides better sealing.

[0081] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A slotter, characterized in that, include: The motor has an output shaft; a primary transmission mechanism including an intermediate shaft and a primary gear structure, wherein the central axes of the intermediate shaft and the output shaft are intersecting, and the primary gear structure drivesly connects the output shaft and the intermediate shaft; and a secondary transmission mechanism including a transmission shaft and a secondary gear structure, wherein the secondary gear structure drivesly connects the intermediate shaft and the transmission shaft, the transmission shaft being used to drive a working head, and its central axis being parallel to the central axis of the intermediate shaft; the central axes of the output shaft, the intermediate shaft, and the transmission shaft are coplanar.

2. The slitter according to claim 1, characterized in that, The primary gear structure includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is sleeved on the outer circumference of the output shaft and can rotate coaxially with the output shaft. The second bevel gear is sleeved on the outer circumference of the intermediate shaft and can drive the intermediate shaft to rotate coaxially.

3. The slitter as claimed in claim 1, characterized in that The two-stage gear structure includes a first spur gear and a second spur gear that mesh with each other. The first spur gear is sleeved on the outer circumference of the intermediate shaft and can rotate coaxially with the intermediate shaft. The second spur gear is sleeved on the outer circumference of the transmission shaft and can drive the transmission shaft to rotate coaxially.

4. The slitter as claimed in claim 1, characterized in that The grooving machine includes a housing, which has a main housing and a head housing that are connected to each other. The motor is located inside the main housing, and the output shaft portion extends into the head housing; Both the primary transmission mechanism and the secondary transmission mechanism are located inside the head shell, and the shape of the head shell is adapted to the outer contour of the primary transmission mechanism and the outer contour of the secondary transmission mechanism. The drive shaft passes through the head shell and is connected to the working head on the outside of the head shell.

5. The slitter as claimed in claim 4, characterized in that The primary gear structure includes a second bevel gear sleeved on the outer periphery of the intermediate shaft, and the head housing is partially flared outward at the position corresponding to the second bevel gear to avoid obstructing the second bevel gear; and / or, The secondary gear structure includes a second spur gear sleeved on the outer periphery of the transmission shaft, and the head shell is partially expanded outward at the position corresponding to the second spur gear to avoid the second spur gear.

6. The slitter as claimed in claim 4, wherein, The head shell has a through hole that connects to its interior, and the drive shaft passes through the through hole into the head shell, with the drive shaft and the through hole having a clearance fit. The grooving machine also includes a sealing ring, which is sandwiched between the inner wall of the through hole and the outer wall of the drive shaft.

7. The slitter as claimed in claim 6, characterized in that The grooving machine also includes a dustproof ring, which is close to the working head relative to the sealing ring. The dustproof ring is sleeved on the outer periphery of the drive shaft and its outer edge forms a labyrinth structure with the head shell.

8. The slitter as claimed in claim 4, wherein, The drive shaft includes a first end and a second end opposite to each other. The first end passes through the head shell and is connected to the working head on the outside of the head shell. The grooving machine also includes: A first bearing is disposed near the first end, with its inner ring fitted around the outer periphery of the drive shaft and its outer ring fixed to the inner wall of the head shell; and, The second bearing is located near the second end, with its inner ring fitted around the outer circumference of the drive shaft and its outer ring fixed to the inner wall of the head shell.

9. The slitter according to claim 8, characterized in that, The secondary gear structure includes a second column gear sleeved on the outer periphery of the transmission shaft; The grooving machine also includes a washer, which is sleeved on the outer periphery of the drive shaft and sandwiched between the second spur gear and the first bearing.

10. The slitter as claimed in claim 4, wherein, The head shell includes a shell and a cover, which are spliced ​​together along the axial direction of the intermediate shaft; The grooving machine also includes a sealing ring, which is located at the joint between the housing and the cover. The drive shaft passes through the cover and is connected to the working head on the outside of the cover.

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