Shaft sleeve, roller, conveying mechanism and side sealing mechanism of small packaging machine

Abstract

The utility model discloses a shaft sleeve, a roller, a conveying mechanism and a side sealing mechanism of a small packaging machine, and relates to the field of side sealing mechanisms of small packaging machines, the shaft sleeve comprises an inner sleeve made of steel and an outer sleeve made of polytetrafluoroethylene, the outer side wall of the inner sleeve is provided with an annular step for installing the outer sleeve, and the outer sleeve is fixedly sleeved on the annular step; the outer sleeve is provided with stripes used for increasing friction force. The roller comprises a central shaft and the shaft sleeve; the conveying mechanism comprises a belt, a driving roller and a driven roller; the side sealing mechanism comprises a conveying mechanism and a high-temperature ironing plate. According to the utility model, the shaft sleeve is easier to process a flat key groove, and the abrasion of the shaft sleeve in a high-temperature environment is reduced, so that the roller can adapt to the working environment of packaging paper by a small packaging machine for a long time.

Description

Technical Field

[0001] The utility model relates to the field of side sealing mechanisms for small package machines, in particular to a shaft sleeve, a roller conveying mechanism and a side sealing mechanism for a small package machine. Background Art

[0002] The small packing machine used in paper mills is a machine for packing tissue paper, which has a side sealing mechanism; the side sealing mechanism is a structure that uses a high-temperature belt to fit the side of the tissue paper package and heat-seal the packaging film. The belt is not only a component in the conveying mechanism for conveying tissue paper packages, but also a high-temperature heat conduction component with a high temperature (usually 180°C). The conveying mechanism includes an active roller, a driven roller, and a belt surrounding the active roller and the driven roller. The active roller and the driven roller tighten the belt to achieve circumferential movement of the active roller with the belt.

[0003] For the active roller, its structure is a rotating shaft connected to the driving mechanism and a sleeve mounted on the rotating shaft. The sleeve is connected to the rotating shaft by a flat key parallel to the axial direction so that the sleeve can rotate with the rotating shaft; for the driven roller, its structure is a fixed shaft and a sleeve mounted on the fixed shaft. A bearing is provided between the sleeve and the fixed shaft so that the sleeve can rotate relative to the fixed shaft; the main function of the driven roller is to tighten the belt. The belt is mounted on the sleeves of the active roller and the driven roller, and the friction force is used to achieve the purpose of the active roller moving with the belt.

[0004] During the actual production process, technical personnel in this field found that the sleeve was very easy to wear, and the belt was not properly tightened after long-term use, affecting product quality. After analysis, it was found that due to the process requirements of small package machines for packaging tissue bags, the belt had a high temperature, causing the sleeve to work in a high temperature environment for a long time. In addition, the sleeve itself was made of nylon (in order to ensure the friction between the sleeve and the belt, the sleeve was made of nylon), and the sleeve expanded due to heat, which aggravated the damage to the sleeve caused by belt friction. Secondly, since the nylon sleeve is not conductive, when processing the sleeve, the traditional wire cutting method is used to process the flat keyway on the sleeve, and conductive components need to be installed, which makes the processing of the sleeve more complicated.

[0005] Therefore, it is necessary to propose a new side sealing mechanism to adapt to the working environment of the small package machine for packaging tissue paper for a long time. Utility Model Content

[0006] The purpose of the utility model is to provide a shaft sleeve, a roller, a conveying mechanism and a side sealing mechanism for a small package machine in response to the above-mentioned problems, which can make it easier to process the flat key groove of the shaft sleeve and reduce the wear of the shaft sleeve in a high temperature environment, so that the roller can adapt to the working environment of the small package machine for packaging tissue paper for a long time.

[0007] The technical solution adopted by the utility model is as follows: a shaft sleeve, including an inner sleeve made of steel and an outer sleeve made of polytetrafluoroethylene, the outer side wall of the inner sleeve is provided with an annular step for installing the outer sleeve, and the outer sleeve is fixedly mounted on the annular step; the outer sleeve is provided with stripes for increasing friction.

[0008] Furthermore, a countersunk hole is provided on the outer sleeve, and a connecting screw hole is provided at a corresponding position of the inner sleeve. A connecting screw passes through the countersunk hole and is threadedly connected to the connecting screw hole to achieve a detachable connection between the outer sleeve and the inner sleeve.

[0009] A roller comprises a central shaft and a sleeve, wherein the central shaft has a mounting position for mounting the sleeve, the sleeve is sleeved on the mounting position and a locking structure for locking the sleeve in the mounting position is connected to the central shaft; wherein:

[0010] If the roller is an active roller, a flat key is provided on the central shaft, and a key slot matching the flat key is provided on the inner sleeve, and the flat key is assembled in the key slot;

[0011] If the roller is a driven roller, the central shaft is rotatably connected to the sleeve.

[0012] Furthermore, for the driven roller, a bearing is fixedly arranged between the central shaft and the shaft sleeve.

[0013] Furthermore, the locking structure includes a locking plate, a locking convex ring arranged on the central axis, a locking screw and a locking screw hole arranged in the axial direction of the central axis; the locking screw passes through the locking plate and is threadedly connected to the locking screw hole, the sleeve is located between the locking plate and the locking convex ring, and the axial length of the installation position is lower than the axial length of the sleeve.

[0014] Furthermore, for the active roller, the end surface areas of the locking plate and the locking convex ring are both larger than the end surface area of ​​the central axis; for the driven roller, the end surface areas of the locking plate and the locking convex ring match the end surface area of ​​the inner ring of the bearing.

[0015] A conveying mechanism comprises a belt, a driving roller and a driven roller, wherein the driving roller and the driven roller are the rollers described above; the belt surrounds the driving roller and the driven roller, and the driving roller and the driven roller are respectively located at two ends of the belt to tighten the belt.

[0016] Furthermore, a limiting groove is provided on the shaft sleeve, and a limiting nail is provided on the inner side of the belt, and the limiting nail is assembled in the limiting groove.

[0017] A side sealing mechanism of a small bag machine includes two side sealing structures arranged in parallel, with a gap between the side sealing structures for placing a tissue bag in motion; the side sealing structure includes a high-temperature ironing plate with a high temperature and the conveying mechanism, the assembly position of the high-temperature ironing plate is located on the inner side of a belt and is in contact with the inner side of the belt; the central axis of the active roller is connected to a rotating motor, and the central axis of the driven roller is assembled on the frame of the small bag machine.

[0018] Furthermore, the high-temperature ironing plate is electrically connected to a power source; or the high-temperature ironing plate has a steam chamber, and the steam chamber is connected to a steam generating device.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0020] 1. The sleeve provided by the utility model is made of polytetrafluoroethylene, which has high temperature resistance and can be used for a long time at -180 to 260°C; and has a certain self-lubricating effect, which effectively reduces the wear of the sleeve, ensures that the belt can be in a taut state for a long time, and enables the roller to adapt to the working environment of the small package machine for packaging paper for a long time;

[0021] 2. The shaft sleeve provided by the utility model has stripes on its outer shell for increasing friction, so that the friction between the shaft sleeve and the belt can be guaranteed under the premise of using polytetrafluoroethylene material, so that the conveying mechanism can operate normally;

[0022] 3. The inner sleeve of the shaft sleeve disclosed by the utility model is made of steel material. The steel material has conductive properties, so that the shaft sleeve does not need to be equipped with conductive components when processing the keyway. The keyway can be processed by traditional wire cutting, saving processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of the shaft sleeve disclosed in the utility model;

[0025] Figure 2 This is a schematic diagram of the axial cross-sectional structure of the active roller disclosed in the utility model;

[0026] Figure 3 It is a schematic diagram of the circumferential cross-sectional structure of the active roller disclosed in the utility model;

[0027] Figure 4 This is a schematic diagram of the axial cross-sectional structure of the driven roller disclosed in the utility model;

[0028] Figure 5 It is a schematic diagram of the circumferential cross-sectional structure of the driven roller disclosed in the utility model;

[0029] Figure 6 It is a structural schematic diagram of the conveying mechanism disclosed in the utility model;

[0030] Figure 7 It is a structural schematic diagram of the side sealing mechanism disclosed in the utility model;

[0031] Markings in the figure: 1-sleeve; 11-outer sleeve; 111-counter sink; 12-inner sleeve; 121-limiting groove; 122-connecting screw hole; 123-keyway; 13-connecting screw; 2-active roller; 21-center shaft; 211-locking convex ring; 212-locking screw hole; 213-flat key; 22-locking plate; 23-locking screw; 3-driven roller; 31-bearing; 4-belt; 41-limiting nail; 5-side sealing structure; 51-high temperature ironing plate. DETAILED DESCRIPTION

[0032] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0033] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0034] Example 1

[0035] like Figure 1 As shown, a shaft sleeve comprises an inner sleeve 12 made of carbon steel and an outer sleeve 11 made of polytetrafluoroethylene. The outer sleeve 11 is made of polytetrafluoroethylene, has high temperature resistance, and can be used for a long time at -180 to 260°C; and has a certain self-lubricating effect, which effectively reduces the wear of the shaft sleeve 1, ensures that the belt 4 can be in a taut state for a long time, and enables the roller to adapt to the working environment of the small package machine for packaging tissue paper for a long time; the outer wall of the inner sleeve 12 is provided with an annular step for installing the outer sleeve 11, and the outer sleeve 11 is fixedly mounted on the annular step; the outer sleeve 11 is provided with stripes for increasing friction, so that the friction between the shaft sleeve 1 and the belt 4 can be guaranteed under the premise of using polytetrafluoroethylene material, so that the conveying mechanism can operate normally.

[0036] In this embodiment, the inner sleeve 12 is made of steel material, which has conductive properties, so that the shaft sleeve 1 does not need to be equipped with conductive components when processing the keyway 123, and the keyway 123 can be processed by traditional wire cutting, saving processing costs.

[0037] Example 2

[0038] Based on Example 1, a specific implementation method that can be implemented is further proposed.

[0039] The detachable connection between the outer sleeve 11 and the inner sleeve 12 facilitates replacement of the outer sleeve 11; if the shaft sleeve 1 is damaged, only the outer sleeve 11 needs to be replaced without replacing the entire shaft sleeve 1, thus saving replacement costs.

[0040] Furthermore, a countersunk hole 111 is provided on the outer sleeve 11, and a connecting screw hole 122 is provided at a corresponding position of the inner sleeve 12. The axial direction of the countersunk hole 111 and the connecting screw 13 is perpendicular to the axial direction of the outer sleeve 11 and the inner sleeve 12. The connecting screw 13 passes through the countersunk hole 111 and is threadedly connected with the connecting screw hole 122, thereby realizing a stable detachable fixed connection between the outer sleeve 11 and the inner sleeve 12.

[0041] Example 3

[0042] A roller, such as Figure 2 -like Figure 5 As shown, it includes a central shaft 21 and the sleeve 1 described in any one of the embodiments 1-2, the central shaft 21 has a mounting position for installing the sleeve 1, the sleeve 1 is sleeved on the mounting position and a locking structure for locking the sleeve 1 in the mounting position is connected to the central shaft 21, the locking mechanism locks the sleeve 1 to prevent the sleeve 1 from moving along the axial direction of the central shaft 21 during operation.

[0043] In this embodiment, if Figure 2-Figure 3 As shown, if the roller is an active roller 2, there needs to be no relative rotation between the sleeve 1 and the center shaft 21, that is, the circumferential position locking of the sleeve 1 and the center shaft 21 can be achieved by a key connection; specifically, a flat key 213 is provided on the center shaft 21, and a key slot 123 matching the flat key 213 is provided on the inner sleeve 12, the geometric dimensions of the flat key 213 match the geometric dimensions of the key slot 123, and the flat key 213 is assembled in the key slot 123.

[0044] Furthermore, the length direction of the keyway 123 penetrates the inner sleeve 12 of the shaft sleeve 1. This design allows the shaft sleeve 1 and the central shaft 21 to be assembled by plugging, thereby achieving the purpose of convenient installation.

[0045] It should be noted that the central shaft 21 in the active roller 2 is connected to the shaft sleeve 1 via a flat key 213 , so that the shaft sleeve 1 can be detachable and the replacement of the shaft sleeve 1 is convenient.

[0046] In this embodiment, if Figure 4-Figure 5 As shown, if the roller is a driven roller 3, the center shaft 21 is rotationally connected to the sleeve 1, that is, the sleeve 1 is sleeved on the installation position and the sleeve 1 and the center shaft 21 are not circumferentially locked. The rotational connection ensures that the sleeve 1 on the driven roller 3 can follow the rotation, thereby ensuring the stability of the circumferential movement of the belt 4.

[0047] Example 4

[0048] Based on Example 3, a feasible specific implementation method is further proposed.

[0049] For the driven roller 3, a bearing 31 is fixedly arranged between the center shaft 21 and the sleeve 1, and the bearing 31 is utilized to improve the stability of relative rotation between the center shaft 21 and the sleeve 1. When the locking mechanism locks the sleeve 1, it only needs to lock the position of the bearing 31, thereby reducing the end face wear of the sleeve 1.

[0050] Example 5

[0051] Based on the implementation methods described in any one of Examples 3-4, a feasible specific implementation method is further proposed.

[0052] like Figure 2-Figure 5 As shown, the locking mechanism includes a locking plate 22 and a locking convex ring 211 arranged on the central shaft 21. The outer diameter of the locking convex ring 211 is larger than the outer diameter of the central shaft 21, and the axis of the locking convex ring 211 is colinear with the axis of the central shaft 21. The position between the locking convex ring 211 and the end face of the central shaft 21 is the installation position; the locking mechanism also includes a locking screw 23 and a locking screw hole 212 arranged in the axial direction of the central shaft 21; the locking screw 23 passes through the locking plate 22 and is threadedly connected with the locking screw hole 212, the sleeve 1 is located between the locking plate 22 and the locking convex ring 211, and the axial length of the installation position is lower than the axial length of the sleeve 1, ensuring that the locking screw 23 presses the locking plate 22 against the end face of the sleeve 1 or the bearing 31, effectively preventing the sleeve 1 from moving along the axial direction of the central shaft 21 during operation.

[0053] Furthermore, for the active roller 2, the end surface areas of the locking plate 22 and the locking cam 211 are both larger than the end surface area of ​​the center shaft 21, that is, the locking plate 22 and the locking cam 211 can be in close contact with the end surface of the sleeve 1, which can not only prevent the sleeve 1 in the active roller 2 from moving along the direction of the center shaft 21 during operation, but also improve the position stability between the sleeve 1 and the center shaft 21 through the locking plate 22 and the locking cam 211, thereby reducing the possibility of circumferential movement.

[0054] Furthermore, for the driven roller 3, the end surface areas of the locking plate 22 and the locking cam 211 are matched with the inner ring end surface area of ​​the bearing 31, that is, the locking plate 22 and the locking cam 211 can be in close contact with the inner ring end surface of the bearing 31, and will not be in close contact with the end surface of the sleeve 1 in the driven roller 3; the locking plate 22 cooperates with the sleeve 1, and the locking cam 211 cooperates with the sleeve 1 to lock the bearing 31 at the corresponding position, and the bearings 31 at both ends of the sleeve 1 constrain the sleeve 1 (steps can be set at both ends of the sleeve 1 for installing the bearing 31 to achieve the purpose of locking), which can not only prevent the sleeve 1 from moving along the axial direction of the center shaft 21 during operation, but also ensure that there is no end surface friction between the sleeve 1 and the locking plate 22 and the locking cam 211, thereby ensuring the rotation stability of the sleeve 1.

[0055] It should be noted that the existing locking method is to open a card slot on the central shaft 21, insert a card into the card slot, and limit the sleeve 1 or the bearing 31 by the card; compared with the existing locking method, the locking mechanism disclosed in this embodiment will not cause card wear and can provide preload force; wherein, card wear will cause the card to fit poorly with the sleeve 1 or the bearing 31, and the sleeve 1 and the bearing 31 are prone to movement after long-term use; providing sufficient preload force is due to the fact that the axial length of the installation position is lower than the axial length of the sleeve 1, which can effectively improve the locking effect.

[0056] Example 6

[0057] A conveying mechanism, such as Figure 6 As shown, it includes a belt 4, an active roller 2 and a driven roller 3, the active roller 2 and the driven roller 3 are the rollers described in any one of the implementation modes in Examples 3-5; the belt 4 surrounds the active roller 2 and the driven roller 3, and the active roller 2 and the driven roller 3 are respectively located at both ends of the belt 4 to tighten the belt 4; the active roller 2 rotates, moving with the belt 4, and the sleeve 1 of the driven roller 3 rotates with the belt 4, so that the belt 4 can rotate circumferentially, thereby achieving the purpose of circulating the tissue paper package.

[0058] Example 7

[0059] Based on Example 6, a feasible implementation method is further proposed.

[0060] A limiting groove 121 is provided on the inner sleeve 12 of the shaft sleeve 1, and a limiting nail 41 is provided on the inner side of the belt 4. The limiting nail 41 is assembled in the limiting groove 121. The limiting groove 121 limits the limiting nail 41 to ensure the stability of the position of the belt 4 and prevent the surface belt 4 from slipping along the axial direction during rotation.

[0061] Example 8

[0062] A side sealing mechanism for a small charter aircraft, such as Figure 7As shown, it includes two side sealing structures 5 arranged in parallel, and there is a gap between the side sealing structures 5 for placing the tissue paper package to move; the side sealing structure 5 includes a high-temperature ironing plate 51 with a high temperature and the conveying mechanism described in any one of the embodiments 6-7, and the assembly position of the high-temperature ironing plate 51 is located on the inner side of the belt 4 and is in contact with the inner side of the belt 4; the central axis 21 of the active roller 2 is connected to the rotating motor, and the central axis 21 of the driven roller 3 is assembled on the frame of the small bag machine.

[0063] In this embodiment, the rotating motor provides power for the conveying mechanism to convey the tissue paper package; specifically, the rotating motor drives the active roller 2 to rotate, and the active roller 2 drives the belt 4 to move circumferentially, and the outer side of the belt 4 is in close contact with the tissue paper package, that is, the belt 4 uses the friction between the belt and the tissue paper package to move the tissue paper package, thereby achieving the purpose of conveying the tissue paper package; further, the belt 4 is a Teflon high-temperature belt 4, which can evenly conduct the heat of the high-temperature ironing plate 51, and the packaging film on the side of the tissue paper package is heat-sealed under the action of heat.

[0064] It should be noted that the high-temperature ironing plate 51 is arranged on the inner side of the belt 4 and is in contact with the inner side of the belt 4, which ensures the stability of heat transfer of the belt 4 while preventing the installation position of the high-temperature ironing plate 51 from blocking the movement of the tissue bag.

[0065] Example 9

[0066] Based on Example 8, a feasible specific implementation method is further proposed.

[0067] Regarding the high-temperature ironing plate 51, the present embodiment proposes the following feasible implementation methods.

[0068] In a first embodiment, the high temperature ironing plate 51 is electrically connected to a power source. The high temperature ironing plate 51 is actually an electric heating plate, which obtains electrical energy from the power source and converts it into thermal energy, thereby providing high temperature.

[0069] In the second embodiment, the high temperature ironing plate 51 has a steam chamber, and the steam chamber is connected to a steam generating device. The steam generating device is a common device in paper mills, which can generate high temperature steam. After the high temperature steam is in the steam chamber of the high temperature steam engine, the high temperature ironing plate 51 has a high temperature.

[0070] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A bushing, characterized in that: The invention comprises an inner sleeve (12) made of steel and an outer sleeve (11) made of polytetrafluoroethylene. The outer wall of the inner sleeve (12) is provided with an annular step for mounting the outer sleeve (11). The outer sleeve (11) is fixedly mounted on the annular step. The outer sleeve (11) is provided with stripes for increasing friction.

2. The sleeve according to claim 1, characterized in that: The outer sleeve (11) is provided with a countersunk hole (111), and a connecting screw hole (122) is provided at a corresponding position of the inner sleeve (12). A connecting screw (13) passes through the countersunk hole (111) and is threadedly connected to the connecting screw hole (122) to achieve a detachable connection between the outer sleeve (11) and the inner sleeve (12).

3. A roller, characterized in that: The invention comprises a central shaft (21) and a sleeve (1) according to any one of claims 1 to 2, wherein the central shaft (21) has a mounting position for mounting the sleeve (1), the sleeve (1) is sleeved on the mounting position and a locking structure for locking the sleeve (1) in the mounting position is connected to the central shaft (21); wherein: If the roller is an active roller (2), a flat key (213) is provided on the central shaft (21), a keyway (123) matching the flat key (213) is provided on the inner sleeve (12), and the flat key (213) is assembled in the keyway (123); If the roller is a driven roller (3), the central shaft (21) is rotationally connected to the shaft sleeve (1).

4. The roller according to claim 3, characterized in that: For the driven roller (3), a bearing (31) is fixedly arranged between the central shaft (21) and the shaft sleeve (1).

5. The roller according to claim 4, characterized in that: The locking structure comprises a locking plate (22), a locking convex ring (211) arranged on the central shaft (21), a locking screw (23) and a locking screw hole (212) arranged in the axial direction of the central shaft (21); the locking screw (23) passes through the locking plate (22) and is threadedly connected to the locking screw hole (212); the shaft sleeve (1) is located between the locking plate (22) and the locking convex ring (211), and the axial length of the installation position is shorter than the axial length of the shaft sleeve (1).

6. The roller according to claim 5, characterized in that: For the active roller (2), the end surface areas of the locking plate (22) and the locking convex ring (211) are both larger than the end surface area of ​​the central shaft (21); for the driven roller (3), the end surface areas of the locking plate (22) and the locking convex ring (211) match the end surface area of ​​the inner ring of the bearing (31).

7. A conveying mechanism, characterized in that: It comprises a belt (4), a driving roller (2) and a driven roller (3), wherein the driving roller (2) and the driven roller (3) are the rollers described in any one of claims 3 to 6; the belt (4) surrounds the driving roller (2) and the driven roller (3), and the driving roller (2) and the driven roller (3) are respectively located at both ends of the belt (4) to tighten the belt (4).

8. The conveying mechanism according to claim 7, characterized in that: The shaft sleeve (1) is provided with a limiting groove (121), and the inner side of the belt (4) is provided with a limiting nail (41), and the limiting nail (41) is assembled in the limiting groove (121).

9. A side sealing mechanism for a small package machine, characterized in that: It comprises two side sealing structures (5) arranged in parallel, and there is a gap between the side sealing structures (5) for accommodating the movement of the tissue paper package; the side sealing structure (5) comprises a high-temperature ironing plate (51) with high temperature and the conveying mechanism according to any one of claims 7-8, and the assembly position of the high-temperature ironing plate (51) is located on the inner side of the belt (4) and is in contact with the inner side of the belt (4); the central axis (21) of the active roller (2) is connected to the rotating motor, and the central axis (21) of the driven roller (3) is assembled on the frame of the small package machine.

10. The side sealing mechanism according to claim 9, characterized in that: The high-temperature ironing plate (51) is electrically connected to a power source; or the high-temperature ironing plate (51) has a steam chamber, and the steam chamber is connected to a steam generating device.

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