Crankshaft for tobacco machine

Abstract

The utility model relates to the technical field of crankshafts, in particular to a crankshaft for a tobacco machine, which comprises a shaft body and an eccentric block, the eccentric block is arranged at one end of the shaft body, the circle center of the eccentric block does not coincide with the circle center of the shaft body, one end of the eccentric block close to the shaft body is provided with a mounting part, and one end of the shaft body is provided with a mounting groove for the mounting part to insert. One end of the shaft body is provided with a first connecting hole which transversely penetrates to the other end of the shaft body by taking the circle center as the midpoint, and the eccentric block is provided with a second connecting hole which can be aligned with the first connecting hole.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft technology, specifically to a detachable crankshaft for a tobacco machine. Background Technology

[0002] The crankshaft, in conjunction with the connecting rod, converts the rotational motion of a motor or engine into reciprocating linear motion. For example, in the cigarette forming and tobacco leaf conveying mechanisms of tobacco machines, components need to perform linear reciprocating motion to complete operations such as compacting tobacco leaves and conveying and wrapping cigarette paper. The crankshaft is the core component that realizes this motion conversion.

[0003] However, during use, it was found that when the crankshaft drives the connecting rod of the tobacco machine, the surface of the crankshaft eccentric block is in continuous contact with the bearing liner. Long-term friction will increase the surface roughness and even cause grooves, which will cause abnormal vibration or noise during operation. Severe wear may even cause the connecting rod to loosen, the crankshaft to break, or even cause the tobacco machine to stop. Therefore, when the eccentric block wears, the entire crankshaft needs to be replaced, which increases the maintenance cost. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a crankshaft for a tobacco machine that allows for the separate replacement of the eccentric block, addressing the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crankshaft for a tobacco machine, comprising a shaft body and an eccentric block, wherein the eccentric block is disposed at one end of the shaft body, and the center of the eccentric block does not coincide with the center of the shaft body, characterized in that: the end of the eccentric block near the shaft body is provided with a mounting part, one end of the shaft body is provided with a mounting groove for the mounting part to be inserted, one end of the shaft body is provided with a first connecting hole extending laterally to the other end with the center as the midpoint, and the eccentric block is provided with a second connecting hole that can be aligned with the first connecting hole.

[0006] The above technical solution, compared with the existing technology in which the eccentric block cannot be disassembled and replaced separately, uses a mounting groove at one end of the shaft and a mounting part on the eccentric block, so that the eccentric block can be inserted into the mounting groove. After long-term use, when the eccentric block is worn, it can be removed and replaced with a new eccentric block, which greatly reduces maintenance costs.

[0007] A further feature of this invention is that the mounting part has a plurality of protruding mounting blocks along its outer circumferential direction, each mounting block has a first mounting hole in the center, the mounting groove has a connecting groove extending outward from the groove wall for the mounting block to be accommodated, the connecting groove has a second mounting hole corresponding to the first mounting hole, and the first mounting hole and the second mounting hole are connected by fasteners.

[0008] By adopting the above technical solution: through the setting of mounting blocks and connecting slots, during the installation process, the mounting blocks on the eccentric block mounting part are installed into the corresponding connecting slots, so that the first mounting hole and the second mounting hole are aligned and the fasteners are installed, which can improve the installation stability between the eccentric block and the shaft body and ensure the performance of the crankshaft during operation.

[0009] A further feature of this invention is that a plug-in post is provided in the middle of the end face of the mounting part, and a plug-in hole is provided in the mounting groove corresponding to the position of the plug-in post, so that the plug-in post can be inserted into the plug-in hole.

[0010] The above technical solution utilizes the insertion pins to provide positioning before installation. Simply align the insertion pins with the insertion holes and insert them. This also further enhances the connection between the eccentric block and the shaft.

[0011] A further feature of this invention is that a bar magnet A is provided on the end face of the mounting part, and a bar magnet B is embedded in the bottom of the mounting groove, wherein the bar magnet A and the bar magnet B can attract each other.

[0012] The above technical solution, through the setting of bar magnet A and bar magnet B, can further play a positioning role during the installation process, so that the first connecting hole and the second connecting hole can be aligned, thus not affecting the connection with the external structure.

[0013] A further feature of this invention is that a third connecting hole is provided on the end of the shaft away from the eccentric block, and an anti-loosening hole is provided in the middle of the shaft. The anti-loosening hole and the third connecting hole are perpendicular to each other and are connected to each other.

[0014] The above technical solution is adopted: by setting the third connecting hole and the anti-loosening hole, after the external mechanism is connected through the third connecting hole, the fastener is screwed into the anti-loosening hole to achieve the anti-loosening effect and ensure the use effect.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is an exploded view of the present invention.

[0018] Figure 3 This is a schematic diagram of the eccentric block structure of this utility model.

[0019] Figure 4 This is an exploded view of the mounting slot of this utility model.

[0020] Figure 5These are schematic diagrams of the overall structure of this utility model from different perspectives.

[0021] Figure 6 This is a cross-sectional view of the present invention.

[0022] Labeling: Shaft 1, Mounting groove 11, Connecting groove 111, Second mounting hole 111a, Insertion hole 112, Bar magnet B113, First connecting hole 12, Third connecting hole 13, Anti-loosening hole 14, Eccentric block 2, Mounting part 21, Mounting block 211, First mounting hole 211a, Insertion post 212, Bar magnet A213, Second connecting hole 22. Detailed Implementation

[0023] In the accompanying drawings of this specific embodiment and the disclosed embodiments, only the structures involved in the disclosed embodiments are involved. Other structures can be referred to with ordinary design. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of this utility model, they are protected by patent law.

[0024] like Figure 1-6 The crankshaft shown is for a tobacco machine and includes a shaft body 1 and an eccentric block 2. The eccentric block 2 is located at one end of the shaft body 1 and the center of the eccentric block 2 does not coincide with the center of the shaft body 1. The end of the eccentric block 2 near the shaft body 1 is provided with a mounting part 21. One end of the shaft body 1 is provided with a mounting groove 11 for the mounting part 21 to be inserted. One end of the shaft body 1 is provided with a first connecting hole 12 extending laterally to the other end with the center as the midpoint. The eccentric block 2 is provided with a second connecting hole 22 that can be aligned with the first connecting hole 12.

[0025] like Figure 2-4 The mounting part 21 shown has a plurality of protruding mounting blocks 211 along its outer circumferential direction. A first mounting hole 211a is provided in the center of the mounting block 211. The groove wall of the mounting groove 11 extends outward to provide a connecting groove 111 for the mounting block 211 to be accommodated. A second mounting hole 111a corresponding to the first mounting hole 211a is provided in the connecting groove 111. The first mounting hole 211a and the second mounting hole 111a are connected by fasteners.

[0026] like Figure 3-4 The mounting part 21 shown has a plug-in post 212 in the middle of its end face, and the mounting groove 11 has a plug-in hole 112 corresponding to the plug-in post 212. The plug-in post 212 can be inserted into the plug-in hole 112. The mounting part 21 has a bar magnet A213 on its end face, and a bar magnet B is embedded in the bottom of the mounting groove 11. The bar magnet A213 and the bar magnet B can attract each other.

[0027] like Figure 5-6The shaft 1 shown is provided with a third connecting hole 13 at the end away from the eccentric block 2, and an anti-loosening hole 14 is provided in the middle of the shaft 1. The anti-loosening hole 14 and the third connecting hole 13 are perpendicular to each other and are connected to each other.

[0028] In the use of this utility model, compared with the prior art where the eccentric block 2 cannot be disassembled and replaced individually, this utility model has a mounting groove 11 at one end of the shaft body 1 and a mounting part 21 on the eccentric block 2. The eccentric block 2 inserts the mounting part 21 into the mounting groove 11, and the mounting blocks 211 on the mounting part 21 of the eccentric block 2 are installed into the corresponding connecting grooves 111. After the first mounting hole 211a and the second mounting hole 111a are aligned, the fasteners are installed. After long-term use, when the eccentric block 2 wears out, it is only necessary to remove the eccentric block 2 and replace it with a new one, which greatly reduces the maintenance cost.

Claims

1. A crankshaft for a tobacco machine, comprising a shaft body and an eccentric block, wherein the eccentric block is disposed at one end of the shaft body, and the center of the eccentric block does not coincide with the center of the shaft body, characterized in that: The eccentric block has a mounting part at one end near the shaft, the shaft has a mounting groove at one end for the mounting part to be inserted, the shaft has a first connecting hole extending laterally to the other end with the center of the circle as the midpoint, and the eccentric block has a second connecting hole that can be aligned with the first connecting hole.

2. The crankshaft for a tobacco machine according to claim 1, characterized in that: The mounting part has a plurality of protruding mounting blocks along its outer circumferential direction. A first mounting hole is provided in the center of each mounting block. The groove wall of the mounting groove extends outward to provide a connecting groove for the mounting block to be accommodated. A second mounting hole corresponding to the first mounting hole is provided in the connecting groove. The first mounting hole and the second mounting hole are connected by fasteners.

3. A crankshaft for a tobacco machine according to claim 2, characterized in that: The mounting part has a plug-in post in the middle of its end face, and the mounting groove has a plug-in hole corresponding to the plug-in post position, so that the plug-in post can be inserted into the plug-in hole.

4. A crankshaft for a tobacco machine according to claim 3, characterized in that: A bar magnet A is provided on the end face of the mounting part, and a bar magnet B is embedded in the bottom of the mounting groove. The bar magnet A and the bar magnet B can attract each other.

5. A crankshaft for a tobacco machine according to any one of claims 1-4, characterized in that: The shaft is provided with a third connecting hole at the end away from the eccentric block, and an anti-loosening hole is provided in the middle of the shaft. The anti-loosening hole and the third connecting hole are perpendicular to each other and are connected to each other.

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