A tobacco cutter feed mechanism

Abstract

The utility model discloses a tobacco shredding machine feed mechanism, it includes screw rod toothing shaft, the surface of screw rod toothing shaft is equipped with thread, the outside of screw rod toothing shaft is connected with push knife block, two protection sleeves are symmetrically arranged to the upper and lower sides of push knife block, the inside of two protection sleeves all is provided with spring piece, the below of protection sleeve is provided with compensation ring, the top of screw rod toothing shaft is equipped with axle end shaft sleeve, the bottom of screw rod toothing shaft is equipped with axle end shaft sleeve, the surface of axle end shaft sleeve and axle end shaft sleeve all are set up a plurality of lubricating oil hole, the inside of lubricating oil hole is inserted with lubricating stick, the end of screw rod toothing shaft is seted up ring groove, and the inside of ring groove is connected with snap spring ring. The utility model has characteristics such as reasonable structure design, good dustproof effect, and the setting of protection sleeve can always carry out dustproof to screw rod toothing shaft surface in the moving process of push knife block.

Description

Technical Field

[0001] This utility model relates to the field of tobacco equipment technology, and in particular to a feeding mechanism for a tobacco shredder. Background Technology

[0002] In the tobacco processing industry, the SQ218 stem cutter is an important production equipment. Its cutting feed mechanism adopts a spatial crank-connecting rod planetary gear system, which can realize precise and stable cutting action. In the process of tobacco stem processing, it undertakes the key task of cutting the stems to the specified size, and plays a vital role in ensuring the quality of tobacco products and production efficiency.

[0003] However, the current mechanism has significant technical flaws. The feed mechanism lacks effective dust prevention measures. In actual production environments, a large amount of dust is unavoidable in the workshop, and numerous particulate contaminants are generated during the grinding and dressing of the grinding wheel. This dust and particles easily enter the feed mechanism, especially the area where the needle roller bearing is externally mounted to the feed bearing. As a key component for precise transmission in the feed mechanism, the needle roller bearing's internal lubrication environment is quickly disrupted by dust and particles, leading to a sharp increase in frictional resistance between the needle rollers and the inner and outer rings of the bearing. Over time, the needle roller bearing frequently jams and fails, severely affecting the normal operation of the stem cutter. This frequent jamming not only significantly increases equipment maintenance costs and downtime, reducing production efficiency, but also affects the precision and quality of stem cutting due to inaccurate feed, thus negatively impacting the quality of tobacco products. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a feeding mechanism for a tobacco shredder, which can solve the technical problem that the feeding mechanism in the prior art lacks dustproof measures, and dust and particles can easily enter its interior, causing the parts to jam and be damaged.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A feeding mechanism for a tobacco shredder includes a lead screw shaft with threads on its surface. A pusher block is connected to the outside of the lead screw shaft. Two protective sleeves are symmetrically arranged on the upper and lower sides of the pusher block. A spring is installed inside each of the two protective sleeves. A compensation ring is installed below the protective sleeves. A shaft end sleeve is fitted on the top of the lead screw shaft, and a shaft end sleeve is fitted on the bottom of the lead screw shaft. Several lubrication oil holes are opened on the surface of both the shaft end sleeve and the shaft end sleeve. A lubricating rod is inserted into the lubrication oil holes. An annular groove is opened at the end of the lead screw shaft, and a retaining ring is engaged inside the annular groove.

[0006] Furthermore, the lead screw includes a drive lead screw and a gear disposed on its surface. The gear is fixedly connected to the outer surface of one end of the drive lead screw. A certain length of thread is provided on the surface of the drive lead screw below the gear, and the pusher block is threadedly connected to the outer surface of the drive lead screw.

[0007] Furthermore, the two protective sleeves provided on the upper and lower sides of the pusher block are the upper sleeve and the lower sleeve, respectively. The upper sleeve and the lower sleeve are symmetrically fitted on the outside of the threads arranged on the surface of the lead screw shaft on the upper and lower sides of the pusher block. The upper sleeve and the lower sleeve can be folded and extended under the action of the springs installed inside them. The compensation ring is fitted on the surface of the lead screw shaft below the lower sleeve. The bottom end face of the compensation ring is embedded with a number of balls at equal intervals in a ring.

[0008] Furthermore, there are two annular grooves, which are respectively formed on the top outer surface and the bottom outer surface of the lead screw shaft.

[0009] Compared with the prior art, the technical solution described in this utility model has the following beneficial effects: 1. This utility model features a reasonable structural design and good dustproof effect. By setting foldable and telescopic protective sleeves on the upper and lower sides of the pusher block, the protective sleeves can extend and retract as the pusher block moves on the surface of the lead screw shaft, always protecting the surface of the lead screw shaft from dust, effectively preventing the entry of dust, particles and other contaminants, extending the service life of the lead screw shaft, and ensuring transmission accuracy. The setting of the compensation ring ensures that the protective sleeve is firmly against the upper and lower sides of the pusher block, further enhancing the protective effect of the protective sleeve and preventing the parts from jamming and being damaged. 2. This utility model, by inserting lubricating rods into the lubrication holes opened on the surfaces of the shaft end sleeve and the shaft end sleeve, not only fully meets the lubricating oil film thickness requirements, ensuring the lubrication effect during the rotation of the shaft end sleeve and reducing friction, but also fills the gaps, effectively reducing the fitting clearance and preventing dust, wear particles, and moisture condensation from entering the interior of the shaft end sleeve and the shaft end sleeve, thus avoiding affecting their rotation performance. Other beneficial effects of this invention will be further explained in the following specific embodiments. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the separation of the lead screw shaft and the retaining ring of this utility model; Figure 3 This is a schematic diagram of the structure of the protective sleeve of this utility model; Figure 4 This is a schematic diagram of the interior of the protective sleeve of this utility model; Figure 5 This is a schematic diagram of the structure of the shaft end sleeve of this utility model; Figure 6 This is a schematic diagram of the structure of the shaft end sleeve of this utility model; The components are: 1. Lead screw shaft; 2. Pusher block; 3. Protective sleeve; 4. Spring component; 5. Compensating ring; 501. Ball bearing; 6. Shaft end sleeve; 7. Shaft end sleeve; 8. Lubrication oil hole; 9. Lubricating rod; 10. Ring groove; 11. Snap ring. Detailed Implementation

[0011] 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.

[0012] In the description of this utility model, it should be understood that the terms "above", "below", "front", "back", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0013] In this utility model, unless otherwise explicitly specified and limited, the terms "setting," "installing," "connecting," "linking," "fixing," and "communicating" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0014] like Figures 1 to 6 As shown, this utility model provides a feeding mechanism for a tobacco shredder. It includes a lead screw shaft 1, the surface of which is threaded, a pusher block 2 connected to the outside of the lead screw shaft 1, two protective sleeves 3 symmetrically arranged on the upper and lower sides of the pusher block 2, a spring 4 inside each of the two protective sleeves 3, a compensation ring 5 below the protective sleeve 3, a shaft end sleeve 6 fitted on the top of the lead screw shaft 1, a shaft end sleeve 7 fitted on the bottom of the lead screw shaft 1, a plurality of lubrication oil receiving holes 8 on the surface of both the shaft end sleeve 6 and the shaft end sleeve 7, a lubrication rod 9 inserted inside the lubrication oil receiving holes 8, and an annular groove 10 formed at the end of the lead screw shaft 1, a retaining ring 11 engaging inside the annular groove 10.

[0015] In the embodiments described in this utility model, the lead screw gear 1 includes a drive lead screw and a shaft tooth disposed on its surface. The shaft tooth is fixedly connected to the outer surface of one end of the drive lead screw. A certain length of thread is provided on the surface of the drive lead screw below the shaft tooth. The pusher block 2 is threadedly connected to the outer surface of the drive lead screw. By rotating the lead screw gear 1, the pusher block 2 can be driven to move along the axial direction of the drive lead screw.

[0016] In the embodiments described in this utility model, the two protective sleeves 3 provided on the upper and lower sides of the pusher block 2 are respectively an upper sleeve and a lower sleeve. The upper sleeve and the lower sleeve are symmetrically fitted onto the outside of the threads arranged on the surface of the lead screw shaft 1 on the upper and lower sides of the pusher block 2. The upper sleeve and the lower sleeve can fold and extend under the action of the spring 4 provided inside them. When the pusher block 2 moves on the surface of the lead screw shaft 1, the protective sleeve 3 can extend and extend accordingly, always protecting the threaded part on the surface of the lead screw shaft 1 from dust, effectively preventing dust, particles and other contaminants from entering the thread gap, preventing the threads from wearing due to contamination, and extending the lead screw teeth. The service life of shaft 1 ensures transmission accuracy. The compensation ring 5 is sleeved on the surface of the lead screw shaft 1 below the lower protective sleeve. Under the support of the spring 4 inside the protective sleeve 3, the compensation ring 5 can make the protective sleeve 3 firmly abut against the upper and lower sides of the pusher block 2, so as to further enhance the protective effect of the protective sleeve 3. The bottom end face of the compensation ring 5 is embedded with several balls 501 at equal intervals in a ring. When the compensation ring 5 is under force, the balls 501 can make the compensation ring 5 bear force evenly, avoiding local wear or sealing problems caused by uneven force, thus improving the service life and protective reliability of the compensation ring 5.

[0017] In the embodiments described in this utility model, both the shaft end sleeve 6 and the shaft end sleeve 7 are made of high-strength brass. This material has the characteristics of high strength, high hardness, corrosion resistance, and good machinability. The sliding bearings made of high-strength brass that are used in conjunction with the shaft end sleeve 6 and the shaft end sleeve 7 can meet the applicable requirements of low load, low speed, and low temperature rise, and can be used in corrosive media. Inserting the lubricating rod 9 into the lubrication oil receiving hole 8 can not only fully meet the requirements of lubricating oil film thickness and ensure the lubrication effect when the shaft end sleeve 6 and the shaft end sleeve 7 rotate, reducing friction, but also fill the gap, effectively reducing the fitting clearance, preventing dust, wear particles, and moisture condensation from entering the interior of the shaft end sleeve 6 and the shaft end sleeve 7, avoiding affecting their rotation effect, and ensuring the stability and reliability of the equipment operation. Specifically, the lubricating rod 9 is mainly made of a cylindrical polymer filler rod by mixing solid lubricants such as graphite and molybdenum disulfide. The materials and methods for making the lubricating rod 9 are existing technologies and are not within the scope of protection claimed by this utility model.

[0018] In the embodiments described in this utility model, there are two annular grooves 10. The two annular grooves 10 are respectively opened on the outer surface of the top end and the outer surface of the bottom end of the lead screw shaft 1. By inserting the retaining ring 11 into the annular groove 10, the position of the shaft end sleeve 6 and the shaft end sleeve 7, which are sleeved and installed on the top and bottom of the lead screw shaft 1, is limited. During the rotation of the lead screw shaft 1, the shaft end sleeve 6 and the shaft end sleeve 7 are effectively prevented from falling off, thus ensuring the accuracy of the position of each component and the stability of the structure.

[0019] Based on the above, the specific working principle of this utility model is as follows: First, one protective sleeve 3 is fitted onto the threaded outer surface of the lead screw shaft 1 near its top. Next, the pusher block 2 is threaded onto the outer surface of the lead screw shaft 1. Then, another protective sleeve 3 is fitted onto the threaded outer surface of the lead screw shaft 1 below the pusher block 2, and a compensation ring 5 is used to seal and limit the movement so that the two protective sleeves 3 are firmly abutted against the upper and lower sides of the pusher block 2 under the support of the spring 4 inside. Subsequently, the shaft end sleeve 6 and the shaft end sleeve 7 are fitted onto the top and bottom of the lead screw shaft 1, respectively. Finally, the retaining ring 11 is inserted into the ring groove 10 to limit the position of the shaft end sleeve 6 and the shaft end sleeve 7 fitted onto the top and bottom of the lead screw shaft 1, preventing them from falling off. This completes the assembly of the tobacco shredder feed mechanism components. The feeding mechanism of the tobacco shredder is installed in a predetermined position on the shredder. The lead screw 1 rotates under the drive of an external power source. The pusher block 2, which is threadedly connected to the lead screw 1, moves along the axial direction of the lead screw 1 under the drive of the lead screw 1. During the movement of the pusher block 2, the two protective sleeves 3 extend and retract according to the moving distance of the pusher block 2 under the action of the springs 4 installed inside them, so as to always maintain dust protection on the threaded part of the lead screw 1. The compensation ring 5 ensures the stable resistance of the two protective sleeves 3. The pusher block 2 is attached to the upper and lower sides, which enhances the protection effect. When the lead screw shaft 1 rotates, the shaft end sleeve 6 and the shaft end sleeve 7 play a supporting and positioning role. The lubricating rod 9 inserted into the lubrication oil hole 8 continuously provides lubrication to the shaft end sleeve 6 and the shaft end sleeve 7, reducing friction and preventing external contaminants from entering. The retaining ring 11 ensures that the shaft end sleeve 6 and the shaft end sleeve 7 will not fall off during the rotation of the lead screw shaft 1, ensuring the stable operation of the entire transmission system, thereby realizing the purpose of using the lead screw shaft 1 to drive the pusher block 2 to complete the corresponding mechanical action.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A feeding mechanism for a tobacco shredder, characterized in that: The device includes a lead screw shaft with threads on its surface. A pusher block is connected to the outside of the lead screw shaft. Two protective sleeves are symmetrically arranged on the upper and lower sides of the pusher block. A spring is installed inside each of the two protective sleeves. A compensation ring is installed below the protective sleeves. A shaft end sleeve is fitted on the top of the lead screw shaft, and a shaft end sleeve is fitted on the bottom of the lead screw shaft. Several lubrication oil holes are opened on the surface of both the shaft end sleeve and the shaft end sleeve. A lubricating rod is inserted into the lubrication oil holes. An annular groove is opened at the end of the lead screw shaft, and a retaining ring is engaged inside the annular groove.

2. The feeding mechanism of a tobacco shredder according to claim 1, characterized in that: The lead screw includes a drive lead screw and a gear set on its surface. The gear is fixedly connected to the outer surface of one end of the drive lead screw. The surface of the drive lead screw below the gear is provided with a certain length of thread. The pusher block is threadedly connected to the outer surface of the drive lead screw.

3. The feeding mechanism of a tobacco shredder according to claim 1, characterized in that: The upper and lower protective sleeves on the upper and lower sides of the pusher block are respectively the upper sleeve and the lower sleeve. The upper sleeve and the lower sleeve are symmetrically fitted on the outside of the threads on the surface of the lead screw shaft on the upper and lower sides of the pusher block. The upper sleeve and the lower sleeve can be folded and extended under the action of the springs installed inside them. The compensation ring is fitted on the surface of the lead screw shaft below the lower sleeve. The bottom end face of the compensation ring is embedded with a number of balls at equal intervals in a ring.

4. The feeding mechanism of a tobacco shredder according to claim 1, characterized in that: The number of annular grooves is set to two, with the two annular grooves respectively opened on the top outer surface and bottom outer surface of the lead screw shaft.

Images