A drive shaft for the grinding wheel of a tobacco shredder

Abstract

This utility model relates to the field of transmission shaft technology, and in particular to a transmission shaft for a grinding wheel of a tobacco shredder. It includes a transmission shaft body, with a mounting hole at the center of one end of the transmission shaft body. A through hole, coaxial with and connected to the mounting hole, is located in the center of the transmission shaft body. The through hole includes a small section and a large section, with the diameter of the small section being smaller than the diameters of the mounting hole and the large section. A push rod is slidably installed within the through hole. The push rod includes a small-diameter portion slidably connected to the small section and a large-diameter portion slidably connected to the large section. A return spring is sleeved on the small-diameter portion. A cover plate is detachably connected to the large section near the large-diameter portion, and an clearance hole is located in the center of the cover plate. This utility model, through its unique design of the through hole, push rod, return spring, and cover plate, improves upon existing technology by enabling convenient and quick disassembly of the motor in the tobacco shredder's grinding device, greatly improving disassembly efficiency. Simultaneously, the structure is simple, facilitating installation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft technology, and in particular to a transmission shaft for a grinding wheel of a tobacco shredder. Background Technology

[0002] When disassembling the motor, the existing grinding device of the tobacco shredder can only pull the motor out. In actual operation, it requires two or more people to use a flathead screwdriver to pry the motor up from both sides. However, it is difficult to achieve equal force on both sides, making it difficult to pull the motor out. If the force is not applied properly, the motor shaft may be bent, or even the motor may be rendered unusable.

[0003] In view of this, Chinese utility model patent with publication number CN204195512U discloses a grinding wheel drive shaft for a tobacco shredder. Although it allows a single person to disassemble the motor without damaging the motor shaft, the method of pushing the motor out by rotating the screw is slow, inefficient, and cumbersome to operate.

[0004] Therefore, it is necessary to improve upon the shortcomings of the existing technologies mentioned above. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a transmission shaft for the grinding wheel of a tobacco shredder, which addresses the shortcomings of the prior art and solves the problems of low efficiency and cumbersome operation in the disassembly of the motor in the grinding device of the tobacco shredder.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a transmission shaft for a grinding wheel of a tobacco shredder, comprising a transmission shaft body, wherein a mounting hole for connecting to a motor shaft is provided at the middle of one end of the transmission shaft body, and a through hole coaxial with and connected to the mounting hole is provided at the middle of the transmission shaft body, the through hole comprising a small hole section near the mounting hole and a large hole section away from the mounting hole, the diameter of the small hole section being smaller than the diameters of the mounting hole and the large hole section, a push rod being slidably installed in the through hole, the push rod comprising a small diameter portion slidably connected to the small hole section and a large diameter portion slidably connected to the large hole section, a return spring being sleeved on the small diameter portion, one end of the return spring abutting against the inner bottom surface of the large hole section and the other end abutting against the side surface of the large diameter portion, a cover plate being detachably connected to the large hole section near the large diameter portion and capable of abutting against the large diameter portion, the cover plate having an avoidance hole in the middle.

[0007] By using the above technical solution, a tool is passed through the clearance hole on the cover plate, and the large diameter part of the push rod is pushed forcefully, causing the push rod to slide along the through hole, compressing the return spring. The small diameter part of the push rod extends out of the small hole section, which can easily push the motor out. After the tool is retracted and the pushing force is removed, the small diameter part of the push rod retracts into the small hole section under the elastic force of the return spring. The operation process is convenient and quick, which can greatly improve the disassembly efficiency of the motor.

[0008] A further provision of the above technical solution is as follows: several protruding locking blocks are symmetrically arranged on the peripheral side of the cover plate, and an avoidance groove corresponding to and matching the locking blocks is provided on the inner wall of the large hole section. The bottom of the avoidance groove is connected to an arc-shaped locking groove, and the locking blocks can be locked into the locking groove.

[0009] Using the above technical solution, when assembling the cover plate, first align the cover plate's locking block with the clearance groove and slide it into the locking groove position, then rotate the cover plate so that the locking block is locked into the locking groove and fixed, thereby realizing the detachable connection between the cover plate and the large hole section on the drive shaft body, which facilitates the installation and maintenance of components such as the push rod and the return spring.

[0010] A further feature of the above technical solution is that the cover plate has several notches and grooves on the periphery of the clearance hole.

[0011] By adopting the above technical solution, the notch groove at the clearance hole on the cover plate makes it easy to rotate the cover plate with tools, thereby making it easy to disassemble and assemble the cover plate.

[0012] A further provision of the above technical solution is that: the outer circumferential surfaces at both ends of the transmission shaft body are provided with a first step and a second step for assembling bearings, and the end of the transmission shaft body near the large hole section is provided with a third step for assembling a grinding wheel.

[0013] By adopting the above technical solution, the setting of the first step, the second step and the third step facilitates the installation and cooperation of the transmission shaft body with the bearing and the grinding wheel, and ensures the overall stability of the device.

[0014] The beneficial effects achieved by this utility model are: through the unique design of through hole, top rod, return spring and cover plate, the disassembly operation of the motor of the grinding device of tobacco shredder is convenient and quick, which can greatly improve the disassembly efficiency of the motor. At the same time, the structure is simple and easy to install and maintain. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model; Figure 2 This is an exploded structural diagram of an embodiment of the present invention; Figure 3 yes Figure 2 A partial view at point A in the middle; Figure 4 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model; Figure 5 This is a cross-sectional structural diagram of the transmission shaft body in an embodiment of this utility model.

[0016] The markings in the diagram are: 1. Drive shaft body; 11. Mounting hole; 12. Through hole; 121. Small hole section; 122. Large hole section; 13. First step; 14. Second step; 15. Third step; 16. Clearance groove; 161. Slot; 2. Push rod; 21. Small diameter section; 22. Large diameter section; 3. Return spring; 4. Cover plate; 41. Clearance hole; 42. Locking block; 43. Notch groove. Detailed Implementation

[0017] 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.

[0018] like Figure 1-5 As shown, a drive shaft for a grinding wheel of a tobacco shredder includes a drive shaft body 1. A mounting hole 11 for connecting to a motor shaft is provided at the middle of one end of the drive shaft body 1. A through hole 12, coaxial with and connected to the mounting hole 11, is provided at the middle of the drive shaft body 1. The through hole 12 includes a small hole section 121 near the mounting hole 11 and a large hole section 122 away from the mounting hole 11. The diameter of the small hole section 121 is smaller than the diameters of the mounting hole 11 and the large hole section 122. A push rod 2 is slidably installed inside the section 122. The push rod 2 includes a small-diameter part 21 that is slidably connected to the small-diameter section 121 and a large-diameter part 22 that is slidably connected to the large-diameter section 122. A return spring 3 is sleeved on the small-diameter part 21. One end of the return spring 3 abuts against the inner bottom surface of the large-diameter section 122, and the other end abuts against the side surface of the large-diameter part 22. A cover plate 4 that can abut against the large-diameter part 22 is detachably connected to the large-diameter section 122 near the large-diameter part 22. A clearance hole 41 is provided in the middle of the cover plate 4. Several protruding locking blocks 42 are symmetrically provided on the peripheral side of the cover plate 4. A clearance groove 16 that matches the locking blocks 42 is provided on the inner wall of the large-diameter section 122. The bottom of the clearance groove 16 is connected to an arc-shaped locking groove 161, and the locking blocks 42 can be locked into the locking groove 161. Several notches 43 are opened on the periphery of the clearance hole 41 on the cover plate 4. The outer circumferential surfaces at both ends of the drive shaft body 1 are provided with a first step 13 and a second step 14 for assembling bearings, and the end of the drive shaft body 1 near the large hole section 122 is provided with a third step 15 for assembling a grinding wheel. In the above embodiment, when it is necessary to disassemble the motor, a tool is used to push the large-diameter portion 22 of the push rod 2 through the clearance hole 41 on the cover plate 4, causing the push rod 2 to slide along the through hole 12, compressing the return spring 3. The small-diameter portion 21 of the push rod 2 extends out of the small hole section 121, and the motor can be easily pushed out. After the tool is withdrawn and the pushing force is removed, the small-diameter portion 21 of the push rod 2 retracts into the small hole section 121 under the elastic force of the return spring 3. This utility model, through the unique structural design of the through hole 12, the push rod 2, the return spring 3, and the cover plate 4, realizes a convenient and quick disassembly operation of the motor of the tobacco shredder grinding device, which can greatly improve the disassembly efficiency of the motor. At the same time, the structure is simple and easy to install and maintain.

Claims

1. A tobacco cutter grinding wheel drive shaft, comprising a drive shaft body (1), a middle part of one end of the drive shaft body (1) is provided with a mounting hole (11) for connecting with a motor shaft, and a middle part of the drive shaft body (1) is provided with a through hole (12) coaxial and communicated with the mounting hole (11), characterized in that: The through hole (12) includes a small hole section (121) near the mounting hole (11) and a large hole section (122) away from the mounting hole (11). The diameter of the small hole section (121) is smaller than the diameters of the mounting hole (11) and the large hole section (122). A push rod (2) is slidably installed in the through hole (12). The push rod (2) includes a small diameter portion (21) slidably connected to the small hole section (121) and a portion slidably connected to the large hole section (122). The large-diameter section (22) is slidably connected, and the small-diameter section (21) is fitted with a return spring (3). One end of the return spring (3) abuts against the inner bottom surface of the large-diameter section (122), and the other end abuts against the side surface of the large-diameter section (22). The large-diameter section (122) is detachably connected to the large-diameter section (22) and a cover plate (4) that abuts against the large-diameter section (22). The cover plate (4) has a clearance hole (41) in the middle.

2. A tobacco cutter blade sharpening wheel drive shaft as defined in claim 1, characterized in that: The cover plate (4) has several symmetrical protruding locking blocks (42) on its peripheral side. The inner wall of the large hole section (122) is provided with a relief groove (16) that corresponds to and matches the locking block (42). The bottom of the relief groove (16) is connected to an arc-shaped locking groove (161). The locking block (42) can be locked into the locking groove (161).

3. A tobacco cutter blade sharpening wheel drive shaft as defined in claim 2, characterized in that: The cover plate (4) has several notches (43) on the periphery of the clearance hole (41).

4. A tobacco cutter blade sharpening wheel drive shaft according to any one of claims 1 to 3, characterized in that: The transmission shaft body (1) has a first step (13) and a second step (14) for assembling bearings on the outer circumferential surfaces at both ends, and a third step (15) for assembling grinding wheel discs is provided at the end of the transmission shaft body (1) near the large hole section (122).

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