Saw cylinder and saw cylinder delinting machine

Abstract

The utility model discloses a saw drum and a saw drum delinting machine. The saw drum comprises a saw shaft, shaft necks arranged at two ends of the saw shaft, and a shaft body arranged between the two shaft necks; the saw blades are fixedly sleeved on the shaft body in groups and are provided with saw blade center holes; and the bearing assembly is used for supporting the shaft neck, and the aperture of the center hole of the saw blade is larger than the outer diameter of an outer ring of a bearing matched with the bearing assembly. According to the saw barrel, the saw blade is convenient to replace, and the damage to the bearing is small or no damage is caused.

Description

Technical Field

[0001] The utility model relates to a saw barrel equipped with a saw barrel depilating machine and also relates to a saw barrel depilating machine equipped with the saw barrel. Background Art

[0002] The saw barrel is one of the necessary and most important parts of the saw barrel de-linting machine. It should be known that the cotton seed roll in the saw barrel de-linting machine mainly relies on the scraping of the saw blade on the saw barrel to achieve the separation of short lint and cotton seeds. In other words, the saw barrel is the core component of the saw barrel de-linting machine.

[0003] It should be known that cotton seeds are continuously fed into the saw barrel delinting machine, and the cotton seeds flow state is usually called cotton seed roll. The cotton seed roll has a certain thickness and compactness. At the same time, the saw barrel has a certain rotation speed during the delinting process, which makes the saw blade and the cotton seed roll squeeze and rub against each other, and the saw blade wears quickly. When the saw blade wears to a certain extent, the delinting effect will be greatly reduced. Therefore, the saw blade needs to be replaced in time to ensure that the saw barrel has a good delinting effect. This replacement is periodic. There is also a situation where the saw blade has to be replaced, that is, a certain saw blade is damaged, which will inevitably increase the frequency of saw blade replacement.

[0004] The saw barrel used in traditional saw barrel depilation machines has a relatively small inner diameter of the saw blade, and the corresponding saw shaft is relatively thin. When replacing the saw blade, it is necessary to first remove the bearings at both ends of the saw shaft and the corresponding bearing housing, and then install the bearings at both ends after the saw blade is replaced. This kind of saw barrel structure not only has complicated steps when disassembling and assembling the saw blade, but also because the inner ring of the bearing and the saw shaft fit tightly (generally an interference fit), it is often necessary to use a puller method to disassemble the bearing. This disassembly method is very easy to damage the bearing, and may even cause the bearing to disintegrate or the bearing ring to break, which may also cause injuries. It can be seen from this that the saw blade of the saw barrel used in traditional saw barrel depilation machines is difficult to assemble and disassemble. In the case of repeated disassembly and assembly, the gap between the bearing and the saw shaft will increase, greatly reducing the service life of the bearing; each time the bearing shell is disassembled, it is necessary to re-lubricate it, and the lubricating oil is easy to leak, which increases the difficulty of workshop cleanliness. Utility Model Content

[0005] The utility model aims to provide a saw barrel which is convenient for replacing saw blades and causes little or no damage to bearings. The utility model also provides a saw barrel depilatory machine equipped with the saw barrel.

[0006] According to a first aspect of an embodiment of the utility model, a saw cylinder is provided, which is a saw cylinder equipped with a saw cylinder depilation machine, and the saw cylinder comprises:

[0007] A saw shaft, wherein both ends of the saw shaft have shaft necks and a shaft body between the two shaft necks;

[0008] Saw blades are fixedly sleeved on the shaft body in groups and have a saw blade center hole;

[0009] The bearing assembly is used to support the shaft neck, and the diameter of the center hole of the saw blade is larger than the outer diameter of the outer ring of the bearing equipped with the bearing assembly.

[0010] Optionally, the diameter of the central hole of the saw blade is larger than the diameter of the circumscribed circle of the cross section of the bearing assembly.

[0011] Optionally, the center hole of the saw blade is provided with a first protrusion or a first groove;

[0012] The shaft body is correspondingly provided with a second groove or a second protrusion, so that the circumferential positioning and connection between the saw blade and the shaft body are formed through the cooperation of the protrusion or the groove.

[0013] Optionally, there is a pair of first protrusions disposed on the saw blade, and the two corresponding first protrusions are symmetrical about the axis of the saw blade;

[0014] A pair of second grooves are provided on the shaft body, and the two corresponding second grooves are symmetrical about the axis of the shaft body;

[0015] The second groove is a through groove or a half through groove in the axial direction of the shaft body. When a half through groove is used, the two corresponding half through grooves are disconnected in the middle of the shaft body.

[0016] Optionally, the second groove on the shaft body is opened on the positioning protrusion on the shaft body;

[0017] Correspondingly, the positioning protrusion extends parallel to the axis direction of the shaft body.

[0018] Optionally, the shaft body further includes a pair of supporting protrusions to assist in supporting the center hole of the saw blade; two protrusions in the pair of supporting protrusions and two protrusions in the positioning protrusions are evenly distributed in the circumference of the shaft body.

[0019] Optionally, the component used to evenly space the saw blades on the shaft body is a spacer ring sleeved on the shaft body.

[0020] Optionally, the spacer includes an inner ring and an outer ring, and a spoke plate between the inner ring and the outer ring to connect the inner ring and the outer ring in a radial direction;

[0021] The inner ring is flush with the outer ring at both ends, and the thickness of the spoke is smaller than the width of the inner ring, thereby forming a weight-reducing structure.

[0022] Optionally, baffles or clamping nuts are used to position and lock the saw blade assembly at both ends of the shaft body;

[0023] When a baffle is used, the baffle is an annular plate, and the inner hole diameter of the baffle is smaller than the outer diameter of the shaft body and is sleeved on the shaft section outside the shaft body and fixed to the end face of the shaft body by axial screws.

[0024] According to a second aspect of an embodiment of the utility model, a saw barrel depilator is provided, which comprises the saw barrel described in the first aspect of an embodiment of the utility model.

[0025] It should be known that the saw barrel equipped with the saw barrel depilator is usually installed on the wall panel of the saw barrel depilator using a pair of bearing assemblies. Since the saw blade can also be understood as a consumable, it needs to be replaced regularly or replaced according to the damage of the saw blade. One of the purposes that needs to be considered is to facilitate the replacement of the saw blade. In the embodiment of the utility model, since the center hole diameter of the saw blade on the saw barrel is larger than the outer diameter of the outer ring of the bearing in the bearing assembly, in other words, the saw blade can be directly removed from the saw barrel without removing the bearing. It should be known that the disassembly and assembly of the bearing is very troublesome, and often requires the use of special tooling and the cooperation of hydraulic equipment for disassembly and assembly. Since there is no need to remove the bearing from the saw shaft, the efficiency of saw blade replacement is greatly improved. Under this condition, the bearing will not be damaged or the damage is relatively small, which increases the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the front view structure of the saw barrel in one embodiment.

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of a saw shaft in one embodiment.

[0028] Figure 3 It is a schematic diagram of the assembly state of the saw blade and the spacer ring in one embodiment when the bearing assembly is not removed.

[0029] Figure 4 Schematic diagram of the main structure of the spacer ring in one embodiment.

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of a bearing assembly in one embodiment.

[0031] In the figure: 1. saw shaft, 2. bearing assembly, 3. clamping nut, 4. process hole, 5. saw blade, 6. spacer, 7. shaft head, 8. shaft neck, 9. smooth shaft section, 10. screw hole, 11. circumferential positioning protrusion, 12. half-through groove, 13. shaft body, 14. support protrusion, 15. positioning groove, 16. weight reduction hole, 17. outer ring, 18. inner ring, 19. ring groove, 20. end cover, 21. bearing, 22. bearing seat. DETAILED DESCRIPTION

[0032] There are two types of failure of the saw blade 5 of the saw barrel on the saw barrel delinting machine: wear failure and fracture failure. The former is mainly caused by friction with cotton seeds, while the latter is caused by collision between heavy impurities contained in the cotton seeds and the saw blade 5. The former is often periodic, that is, the saw blade 5 needs to be replaced periodically, while the latter needs to be replaced according to the damage of the saw blade 5, and has a relatively high randomness.

[0033] The above two failure modes may require the saw barrel to be disassembled from the saw barrel depilator, and then all or part of the saw blade 5 is replaced. The two failure modes determine that the saw barrel is disassembled from the saw barrel depilator at a relatively high frequency. The bearing 21 is most damaged when replacing the saw blade 5, and one disassembly may cause damage to the bearing 21.

[0034] The saw cylinder has typical characteristics of a rotating body, and has typical circumferential, axial and radial directions.

[0035] The shaft section of the traditional saw barrel used to install the saw blade 5, that is, the shaft body 13 is relatively thin. On the one hand, it can avoid the interference between the saw barrel and the ribs of the saw barrel depilator, and the design flexibility is relatively good. However, the rigidity of the shaft body 13 that is too thin is relatively low. Although the current saw shaft 1 is generally a tube shaft, in order to meet the overall rigidity requirements of the saw barrel, the hollow volume of the tube shaft is relatively small. In the embodiment of the present utility model, if the outer diameter of the shaft body is enlarged, the material used can be smaller. It should be known that for the same cross-sectional area, the more it is dispersed outward, the higher its shear section coefficient is. A typical application is a tube shaft, which has a stronger shear resistance than a solid shaft with the same cross-sectional area. Under this condition, although the outer diameter of the shaft body 13 of the saw shaft 1 used becomes larger, the overall weight can be relatively smaller, which can effectively reduce the burden of the drive device that drives the saw barrel to rotate.

[0036] Furthermore, in the embodiment of the utility model, the provided saw cylinder also includes a saw shaft 1, a saw blade 5, and a bearing assembly 2. The saw shaft 1, like the conventional saw shaft 1, has a journal 8 at both ends for mounting the bearing 21, and the main part of the saw shaft 1 located between the two journals 8 is the shaft body 13. Different from the conventional saw shaft 1, the outer diameter of the bearing 13 according to the embodiment of the utility model is relatively large, and its purpose is to adapt to the assembly of the saw blade 5 with a larger saw blade center hole.

[0037] Each saw shaft 1 is usually equipped with more than one hundred saw blades 5. As the saw shaft depilation machine becomes larger, saw shafts with more than two hundred saw blades 5 have also appeared. The saw blades 5 are generally evenly spaced on the saw shaft 1. This is common knowledge in the art and will not be described here. In the embodiment of the present invention, the relatively large diameter of the saw blade center hole of the saw blade 5 is the focus of improvement.

[0038] The diameter of the center hole of the saw blade is designed based on the bearing assembly 2. In some embodiments, the diameter of the center hole of the saw blade can be designed based only on the outer diameter of the outer ring of the bearing 21 in the bearing assembly 2 to reduce the impact on the design of other components, such as the matching relationship between the saw barrel and the ribs.

[0039] In some embodiments, the aperture of the center hole of the saw blade is directly designed based on the bearing assembly 2, that is, without opening the bearing assembly 2, it is only necessary to remove the bearing assembly 2 from the wall panel of the saw barrel depilator, and the saw blade 5 can be removed from the saw shaft 1 without disassembling the bearing assembly 2.

[0040] However, no matter whether the size of the bearing 21 is used as the design basis or the size of the bearing assembly 2 is used directly as the design basis, the design basis is very clear on the corresponding saw tube depilator, and it is easy for technicians in this field to realize it after reading the contents of this utility model.

[0041] In the embodiment of the utility model, it is a minimum requirement that the diameter of the center hole of the saw blade is larger than the outer diameter of the outer ring of the bearing 21 provided in the bearing assembly 2. Under this condition, the saw blade 5 can be removed from the saw shaft 1 without removing the bearing 21 from the saw shaft 1.

[0042] From the above description, it can be known that the component that is most damaged when replacing the saw blade 5 in the traditional saw barrel is the bearing 21. In other words, the rest of the bearing assembly 2 can be considered less. In terms of the efficiency of replacing the saw blade 5, a larger saw blade center hole is required so that the saw blade 5 can be replaced without disassembling the bearing assembly 2. In this case, the diameter of the saw blade center hole is required to be larger than the diameter of the circumscribed circle of the cross section of the bearing assembly 2. If other factors are considered, such as the size and assembly position of other components that cooperate with or are adjacent to the saw barrel on the saw barrel depilation machine, a relatively smaller saw blade center hole diameter can be selected, but it should also be larger than the outer diameter of the outer ring of the bearing 21.

[0043] At the same time, it should be known that the diameter of the center hole of the saw blade is larger than the diameter of the circumscribed circle of the cross section of the bearing assembly 2 and is also necessarily larger than the outer diameter of the outer ring of the bearing 21 equipped with the bearing assembly 2.

[0044] As mentioned above, since the center hole of the saw blade is based on the concept of the present invention, its design basis is clear. Under the concept of the present invention, it is relatively easy for technicians in this field to implement it, and no further details are given.

[0045] The following is an explanation of the structure or construction of the rest of the saw barrel. First, the assembly method of the saw blade 5 on the saw shaft 1. It should be known that the saw blade 5 is not only circumferentially connected to the saw shaft 1, but also axially connected. This is necessary and is well known to those skilled in the art. A known assembly method of the saw blade 5 on the saw shaft 1 can be selected.

[0046] In the embodiment of the utility model, a circumferential connection method of the saw blade 5 on the saw shaft 1 is also provided, wherein the center hole of the saw blade is provided with a first protrusion or a first groove; correspondingly, the shaft body 13 is provided with a second groove or a second protrusion, that is, the saw blade 5 and the shaft body 13 are in a matching relationship, one is provided with a protrusion, and the other is provided with a groove that can be circumferentially connected to the protrusion, so that the circumferential positioning and connection between the saw blade and the shaft body can be formed by the cooperation of the protrusion or the groove. If the center hole of the saw blade is provided with a first protrusion, then the shaft body 13 needs to be provided with a second groove, and the circumferential connection is achieved through the cooperation of the two.

[0047] This connection method is similar to a key connection and is essentially a type of key connection, except that the corresponding key or keyway is directly constructed on the saw blade 5 or the shaft body 13.

[0048] In order to improve the positioning accuracy and centering performance, a pair of first protrusions are provided on the saw blade 5, and the corresponding two first protrusions provided on the saw blade 5 are symmetrical about the axis of the saw blade 5; Figure 2 and Figure 3 In the illustrated structure, a pair of second grooves are provided on the shaft body 13 , and the two corresponding second grooves are symmetrical about the axis of the shaft body 13 .

[0049] The second groove is an axial through groove or half through groove 12 of the shaft body. When a half through groove 12 is used, the two corresponding half through grooves 12 are disconnected in the middle of the shaft body, that is, this can be a shaft body entity, or it can be a component installed later, so as to divide the saw blade 5 into two groups, so as to reduce the installation distance of the saw blade 5 and improve the reliability of axial positioning.

[0050] exist Figure 2 In the illustrated structure, the second groove on the shaft body 13 is opened on the positioning protrusion 11 on the shaft body; accordingly, the positioning protrusion 11 extends in a direction parallel to the axis of the shaft body 13. Under this condition, the saw blade 5 can reduce interference with the shaft body 13 during installation, and the efficiency of replacing the saw blade 5 can be improved.

[0051] The reduction of assembly interference should be appropriate, and the reliability of the saw blade 5 after assembly should be taken as a prerequisite. In order to further improve the reliability of assembly while meeting the assembly efficiency, Figure 2 As shown, the shaft body 13 also includes a pair of supporting protrusions 14 to assist in supporting the center hole of the saw blade; the two protrusions in the pair of supporting protrusions 14 and the two protrusions in the positioning protrusions 11 are evenly distributed around the shaft body 13, thereby improving the support reliability of the saw blade 5.

[0052] Regarding the realization of the predetermined interval between the saw blades 5, on the one hand, the saw blade 5 may have a hub sleeve, and the length of the hub sleeve is used to determine the distance between adjacent saw blades 5. On the other hand, a component specifically used for determining the distance may be provided to achieve the distance determination. In the embodiment of the utility model, a spacer 6 is used for determining the distance, that is, a spacer 6 is provided between adjacent saw blades 5, and the length of the spacer 6 is used to achieve the distance between adjacent saw blades 5.

[0053] Accordingly, the spacer ring 6 must be mounted on the shaft body 13 .

[0054] Figure 4 As shown, it is a weight-reducing design. As can be seen from the figure, the spacer 6 includes an inner ring 18 and an outer ring 17, and a spoke plate between the inner ring 18 and the outer ring 17 to radially connect the inner ring 17 and the outer ring 18; accordingly, the inner ring 17 and the outer ring 18 are flush at both ends for double positioning, and the thickness of the spoke plate is smaller than the width of the inner ring 17 to form a weight-reducing structure. In other words, it is equivalent to having an annular groove on the side end face of the spacer 6, and the annular groove can be opened on one end face of the spacer 6, or on both end faces of the spacer 6.

[0055] In order to further reduce weight, weight-reducing holes 16 are evenly distributed on the spoke plate. It should be noted that since the spacer 6 mainly bears axial loads, the spoke plate only needs to satisfy the radial connection between the inner ring 18 and the outer ring 17. The other loads it carries are very small, and the spoke plate can be relatively thin.

[0056] exist Figure 1 and Figure 2 In the embodiment, the two ends of the shaft body 13 are locked and positioned with baffles or clamping nuts 3 for the saw blade assembly. When the clamping nuts 3 are used, Figure 2 The optical axis section 9 in the embodiment needs to have an external thread, and the clamping nut 3 cooperates with the external thread to achieve locking.

[0057] If a baffle is used, and a round baffle is used, then Figure 2 The optical axis section 9 is mounted on the baffle, and the outer diameter of the optical axis section is smaller than the end face diameter of the shaft body 13. At this time, there is an exposed end face of the shaft body 13 between the two, and a screw hole 10 is opened on the end face of the shaft body for fixing the circular baffle. Correspondingly, an assembly hole aligned with the screw hole 10 is opened on the circular baffle.

Claims

1. A saw cylinder, which is a saw cylinder for a saw cylinder depilation machine, characterized in that: The saw cylinder comprises: A saw shaft, wherein both ends of the saw shaft have shaft necks and a shaft body between the two shaft necks; Saw blades are fixedly sleeved on the shaft body in groups and have a saw blade center hole; The bearing assembly is used to support the shaft neck, and the diameter of the center hole of the saw blade is larger than the outer diameter of the outer ring of the bearing equipped with the bearing assembly.

2. The saw cylinder according to claim 1, characterized in that: The diameter of the central hole of the saw blade is larger than the diameter of the circumscribed circle of the cross section of the bearing assembly.

3. The saw cylinder according to claim 1, characterized in that: The center hole of the saw blade is provided with a first protrusion or a first groove; The shaft body is correspondingly provided with a second groove or a second protrusion, so that the circumferential positioning and connection between the saw blade and the shaft body are formed through the cooperation of the protrusion or the groove.

4. The saw cylinder according to claim 3, characterized in that: A pair of first protrusions are arranged on the saw blade, and the two corresponding first protrusions are symmetrical about the axis of the saw blade; A pair of second grooves are provided on the shaft body, and the two corresponding second grooves are symmetrical about the axis of the shaft body; The second groove is a through groove or a half through groove in the axial direction of the shaft body. When a half through groove is used, the two corresponding half through grooves are disconnected in the middle of the shaft body.

5. The saw cylinder according to claim 4, characterized in that: The second groove on the shaft body is opened on the positioning protrusion on the shaft body; Correspondingly, the positioning protrusion extends parallel to the axis direction of the shaft body.

6. The saw cylinder according to claim 5, characterized in that: The shaft body also includes a pair of supporting protrusions to assist in supporting the center hole of the saw blade; two protrusions in the pair of supporting protrusions and two protrusions in the positioning protrusions are evenly distributed in the circumferential direction of the shaft body.

7. The saw cylinder according to claim 1, characterized in that: The component used for evenly spacing the saw blades on the shaft body is a spacer sleeved on the shaft body.

8. The saw cylinder according to claim 7, characterized in that The spacer includes an inner ring and an outer ring, and a spoke plate between the inner ring and the outer ring to connect the inner ring and the outer ring in a radial direction; The inner ring is flush with the outer ring at both ends, and the thickness of the spoke is smaller than the width of the inner ring, thereby forming a weight-reducing structure.

9. The saw cylinder according to claim 1, characterized in that: The saw blade assembly is positioned and locked with baffles or compression nuts at both ends of the shaft body; When a baffle is used, the baffle is an annular plate, and the inner hole diameter of the baffle is smaller than the outer diameter of the shaft body and is sleeved on the shaft section outside the shaft body and fixed to the end face of the shaft body by axial screws.

10. A saw tube depilatory machine, characterized in that: The invention comprises the saw cylinder as described in any one of claims 1 to 9.

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