Driven shaft for belt conveyor and belt conveyor

Abstract

The utility model discloses a belt conveyor and a driven shaft for the belt conveyor, the driven shaft for the belt conveyor comprises a roller shaft, the two ends of the roller shaft are sequentially provided with a first step part and a connecting rod which extend outwards along the axial direction of the roller shaft; the shaft sleeve is detachably arranged on the connecting rod in a sleeving mode, and one end of the shaft sleeve abuts against the first step part; and the locking assembly is arranged at the position where the shaft sleeve abuts against the first step part in a sleeving mode, and the locking assembly is used for locking the shaft sleeve and the first step part so that the shaft sleeve and the connecting rod can synchronously rotate together. According to the utility model, the maintenance labor intensity can be reduced, and the fault maintenance time is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of transportation equipment, especially relates to a passive shaft for belt conveyor and belt conveyor. BACKGROUND

[0002] The belt conveyor is the commonly used material conveying equipment in tobacco industry, adopts the active roller, the passive roller to the annular conveyor belt and is tensioned. By motor speed reducer through chain drive drives the active roller rotation, thereby drives the belt conveyor operation. A common fault form of the belt conveyor is that the journal position of the wheel shaft of the passive roller cooperated with the bearing is easy to wear. For this kind of fault, the usual processing measure is to disassemble the bearing, and the passive roller is disassembled, the journal is carried out surfacing welding, finish machining, so that it restores the original size accuracy. However, the passive roller is heavy, especially the high-altitude belt conveyor, often needs 3-4 repair workers to cooperate and takes 2 hours to complete the disassembly and assembly work, and the processing time needs about 3 hours to complete, and the production continuity is greatly influenced. SUMMARY

[0003] The utility model discloses a kind of passive shaft for belt conveyor and belt conveyor, which can reduce maintenance labor intensity, shorten fault maintenance time.

[0004] To solve the above technical problems, the embodiment of the utility model provides a kind of passive shaft for belt conveyor, comprising:

[0005] Roller shaft, the two ends of roller shaft are sequentially provided with first step portion and connecting rod outwardly protruding along the axial direction of roller shaft;

[0006] Shaft sleeve, detachably sleeved on connecting rod, one end of shaft sleeve is in abutment with first step portion;

[0007] Locking assembly, sleeved at the position where shaft sleeve and first step portion are in abutment, locking assembly is used to lock shaft sleeve and first step portion, so that shaft sleeve can be synchronously rotated with connecting rod.

[0008] According to another specific embodiment of the utility model, the inside of shaft sleeve is provided with internal thread, and the circumferential surface of connecting rod is provided with external thread, and shaft sleeve is threadedly connected with connecting rod.

[0009] According to another specific embodiment of the utility model, the thread direction of connecting rod at the two ends of roller shaft is opposite.

[0010] According to another specific embodiment of the utility model, the shaft sleeve includes second step portion and journal portion, the outer diameter of second step portion is equal to the outer diameter of first step portion, and greater than the outer diameter of journal portion.

[0011] According to another specific embodiment of the present application, two tenon grooves are arranged on the circumferential surface of the end of the shaft neck part away from the second step part, and the two tenon grooves are arranged opposite to each other along the radial direction of the shaft neck part.

[0012] According to another specific embodiment of the present application, the locking assembly comprises a hoop and a bolt, the hoop is provided with a circular through hole, the circular through hole is arranged on the outer circumferential surface of the first step part and the second step part, one side of the hoop is provided with an opening in communication with the circular through hole, two threaded holes are arranged on the two sides of the opening and in communication with each other, and the bolt is sequentially inserted into the two threaded holes and is in threaded connection with the threaded holes to lock the hoop.

[0013] According to another specific embodiment of the present application, a positioning shoulder is arranged on the end surface of the side of the hoop away from the roller shaft.

[0014] According to another specific embodiment of the present application, the length of the positioning shoulder in the axial direction is not more than the position of the second step part connected with the shaft neck part.

[0015] According to another specific embodiment of the present application, along the axial direction of the driven shaft, the end surface of the positioning shoulder is located between the two end surfaces of the second step part, and the outer diameter of the positioning shoulder is smaller than the outer diameter of the body of the hoop.

[0016] The embodiment of the present application also provides a belt conveyor, which comprises the driven roller and the bearing as described above, and the shaft sleeve is at least partially inserted into the bearing.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] The driven roller is divided into two parts of the roller shaft and the shaft sleeve in the present application, and the shaft sleeve is detachably connected with the connecting rod on the roller shaft, the shaft sleeve is locked on the roller shaft through the locking assembly, so that the shaft sleeve and the roller shaft rotate synchronously. When in use, the shaft sleeve is installed to the inner ring of the bearing, so that when the shaft sleeve is worn, the shaft sleeve can be replaced by only loosening the locking assembly and dismounting the shaft sleeve of the roller shaft, without dismounting the roller shaft, thereby reducing the labor intensity of maintenance and shortening the fault maintenance time. In addition, when the driven roller is reserved, the size of the roller shaft is various, and the size of the shaft neck is uniform. Since the shaft sleeve and the roller shaft of the driven roller in the present application are detachably connected, only the roller shaft with the corresponding size and the shaft sleeve with the uniform size need to be reserved, thereby simplifying the spare parts reservation and saving the inventory cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 An exploded schematic view of the driven roller for the belt conveyor provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0020] The following is an explanation of the implementation of the present invention by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide an in-depth understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0023] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0024] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0026] The applicant has found through research that the main reasons why the journal of the passive roller in the prior art is prone to wear are as follows:

[0027] The journal of the passive roller is connected to the bearing. Unless the bearing fails, there is no relative sliding between the journal and the bearing. However, if the bearing fails, the rolling resistance of the bearing inner ring exceeds the effective retaining capacity of the retaining screw, and the bearing may even become stuck and unable to rotate. At this point, the journal and the bearing inner ring will slide relative to each other. The bearing inner ring is typically made of high-carbon chromium steel through a hardening process, which greatly exceeds the hardness of the journal steel, thus causing wear on the journal.

[0028] like Figure 1 As shown, Figure 1 A driven shaft for a belt conveyor provided in one embodiment of the present invention. In this embodiment, the driven shaft for a belt conveyor includes:

[0029] The roller shaft 1 has a first step portion 11 and a connecting rod 12 extending outward along the axial direction of the roller shaft 1 at both ends of the roller shaft 1.

[0030] The sleeve 2 is detachably mounted on the connecting rod 12, with one end of the sleeve 2 abutting against the first step 11;

[0031] The locking assembly 3 is sleeved on the position where the sleeve 2 abuts the first step portion 11. The locking assembly 3 is used to lock the sleeve 2 and the first step portion 11, that is, the locking assembly 3 can lock the sleeve 2 on the first step portion 11 so that the sleeve 2 can rotate synchronously with the connecting rod 12.

[0032] With this technical solution, the passive roller is divided into two parts: a roller shaft 1 and a sleeve 2. The sleeve 2 is detachably connected to the connecting rod 12 on the roller shaft 1. The sleeve 2 is locked to the roller shaft 1 by the locking assembly 3 to ensure that the sleeve 2 and the roller shaft 1 rotate synchronously. During use, the sleeve 2 is installed on the inner ring of the bearing. Therefore, when the sleeve 2 is worn, it is only necessary to loosen the locking assembly 3 and remove the sleeve 2 from the roller shaft 1 to complete the replacement of the sleeve 2 without removing the roller shaft 1, thereby reducing the maintenance labor intensity and shortening the fault repair time. In addition, when stocking passive rollers, the roller shaft 1 has a variety of sizes, while the size of the shaft neck is uniform. Since the sleeve 2 of the passive roller in the utility model is detachably connected to the roller shaft 1, it is only necessary to stock roller shafts 1 of corresponding sizes and sleeves 2 of uniform sizes, which simplifies the spare parts reserve and saves inventory costs.

[0033] Specifically, the roller shaft 1 is cylindrical, with end caps at each end. A first step 11 and a connecting rod 12 are sequentially provided on the outside of the end caps and located along the axis of the roller shaft 1. A sleeve 2 is removably attached to and fits over the connecting rod 12. The end of the sleeve 2 facing the first step 11 abuts against the first step 11. After the sleeve 2 is fitted onto the connecting rod 12, the locking assembly 3 locks the sleeve 2 to the first step 11, enabling synchronous rotation of the sleeve 2 and the roller shaft 1.

[0034] For example, the interior of the sleeve 2 is provided with an internal thread, the circumferential surface of the connecting rod 12 is provided with an external thread, and the sleeve 2 is threadedly connected to the connecting rod 12.

[0035] By adopting this technical solution, the sleeve 2 is threadedly connected to the connecting rod 12, which can increase the connection strength and prevent the sleeve 2 from being displaced in the axial direction.

[0036] Furthermore, the thread directions of the connecting rods 12 at both ends of the roller shaft 1 are opposite.

[0037] Specifically, the internal threads of the sleeves 2 mounted on the connecting rods 12 at both ends of the roller shaft 1 are left-handed and right-handed, respectively. The roller shaft 1 rotates during operation. Therefore, since the connecting rods 12 on either side of the roller shaft 1 move clockwise and counterclockwise, respectively, the relative motion trends of the sleeves 2 and the connecting rods 12 during operation are clockwise and counterclockwise, respectively. When the roller shaft 1 rotates, the sleeve 2 on the side rotating clockwise relative to the connecting rod 12 moves counterclockwise. Therefore, the internal threads of the sleeve 2 on that side are left-handed, while the sleeve 2 on the side rotating counterclockwise is right-handed.

[0038] This technical solution can prevent the threaded connection between the sleeve 2 and the connecting rod 12 from loosening when the roller shaft 1 rotates, thereby reliably connecting the sleeve 2 to the roller shaft 1.

[0039] During use, anti-rust grease can be applied to both the shaft sleeve 2 and the connecting rod 12 to prevent the shaft sleeve 2 and the connecting rod 12 from getting stuck.

[0040] Furthermore, the sleeve 2 includes a second step portion 21 and a journal portion 22. The outer diameter of the second step portion 21 is equal to the outer diameter of the first step portion 11 and larger than the outer diameter of the journal portion 22. The journal portion 22 is used to be inserted into the bearing.

[0041] By adopting this technical solution, by setting the outer diameter of the second step portion 21 to be equal to the outer diameter of the first step portion 11, the second step portion 21 can be flush with the circumferential surface of the first step portion 11, so that the locking assembly 3 can contact the circumferential surfaces of the second step portion 21 and the first step portion 11 at the same time, increasing the contact area and improving the connection strength.

[0042] Furthermore, two tenon grooves 23 are provided on the circumferential surface of the end of the journal portion 22 away from the second step portion 21 , and the two tenon grooves 23 are arranged opposite to each other along the radial direction of the journal portion 22 .

[0043] Specifically, two mortises 23 are provided on the end of the sleeve 2, distal from the second step 21, and correspond to each other in the radial direction of the sleeve 2. The mortises 23 are located on the outer surface of the sleeve 2, and the bottom surface of the mortises 23 is flat. This technical solution facilitates the use of tools such as wrenches to apply force to the sleeve 2, thereby facilitating assembly and disassembly of the sleeve 2.

[0044] Furthermore, the locking assembly includes a clamp 31 and a bolt 32. A circular through hole 311 is provided on the clamp 31, and the circular through hole 311 is sleeved on the outer circumferential surface of the first step portion 11 and the second step portion 21. One side of the clamp 31 is provided with an opening connected to the circular through hole 311, and both sides of the opening are respectively provided with threaded holes that penetrate each other. The bolt 32 is inserted into the two threaded holes in turn and is threadedly connected to the threaded holes to lock the clamp 31.

[0045] Specifically, the clamp 31 is annular with one side open. A circular through hole 311 in the clamp 31 is designed to fit over the outer circumference of the first step 11 and the second step 21. Threaded holes are provided on either side of the opening. By inserting and tightening bolts 32 into the threaded holes, an interference fit is formed between the clamp 31 and the first and second step 11, 21 surfaces. The clamp 31's radial thickness allows it to withstand tangential forces, thereby strengthening the connection between the sleeve 2 and the connecting rod 12.

[0046] In one embodiment, the axial length of the clamp 31 is set to be consistent with the axial length of the first step portion 11 and the second step portion 21 .

[0047] In another embodiment, a positioning shoulder 312 is provided on the end surface of the clamp 31 facing away from the roller shaft 1 .

[0048] Optionally, along the axial direction of the passive shaft, the end surface of the positioning boss 32 is located between the two end surfaces of the second step portion 21 , and the outer diameter of the positioning boss 312 is smaller than the outer diameter of the body of the clamp 31 .

[0049] With this technical solution, a positioning boss 312 is provided on the end of the circular through hole 311 near the sleeve 2, extending axially outward from the end. The outer diameter of the positioning boss 312 is smaller than the outer diameter of the main body of the clamp 31. When the clamp 31 is fitted over the outside of the first step 11 and the second step 21, the positioning boss 312 can contact the second step 21, thereby increasing the contact area between the clamp 31 and the first step 11 and improving the connection strength. Furthermore, the radial thickness of the positioning boss 312 is smaller than the radial thickness of the main body of the clamp 31, which reduces the contact area between the end of the clamp 31 and the bearing, thereby preventing large-scale friction and heat generation.

[0050] For example, a flange 13 is provided on each end face of the roller shaft 1. The flange 13 is annular and coincides with the axis of the roller shaft 1 and has the same outer diameter. This technical solution is easy to process and meets the requirements of use, and increases the contact area between the roller shaft 1 and the belt in the belt conveyor.

[0051] During use, after the roller shaft 1 is installed in the predetermined position, the sleeve 2 is placed on the connecting rod 12, and the second step portion 21 is abutted against the first step portion 11. After the hoop 31 is placed on the first step portion 11 and the second step portion 21, the hoop 31 is tightened with the bolt 32. The sleeve 2 is then installed on the bearing to complete the installation of the passive roller. When disassembly and maintenance are required, the bolt 32 is loosened in the original position to release the interference fit between the hoop 31 and the first step portion 11 and the second step portion 21, and the sleeve 2 is removed from the roller shaft 1. The shaft neck (i.e., the sleeve 2) can be replaced without removing the roller shaft 1.

[0052] The passive roller of the belt conveyor provided by the utility model reduces maintenance labor intensity, shortens fault repair time, simplifies the reserve of spare parts, and saves inventory costs.

[0053] The embodiment of the present invention further provides a belt conveyor, a bearing and a passive roller as described above, wherein the shaft sleeve 2 of the passive roller is at least partially inserted into the bearing.

[0054] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A driven shaft for a belt conveyor, characterized in that: include: A roller shaft (1), wherein both ends of the roller shaft (1) are provided with a first step portion (11) and a connecting rod (12) extending outward along the axial direction of the roller shaft (1); A shaft sleeve (2) is detachably sleeved on the connecting rod (12), and one end of the shaft sleeve (2) abuts against the first step portion (11); A locking assembly (3) is sleeved at a position where the shaft sleeve (2) and the first step portion (11) abut against each other, and the locking assembly (3) is used to lock the shaft sleeve (2) and the first step portion (11) so that the shaft sleeve (2) can rotate synchronously with the connecting rod (12).

2. The passive shaft according to claim 1, characterized in that: The interior of the shaft sleeve (2) is provided with an internal thread, the circumferential surface of the connecting rod (12) is provided with an external thread, and the shaft sleeve (2) is threadedly connected to the connecting rod (12).

3. The passive shaft according to claim 2, characterized in that: The thread directions of the connecting rods (12) located at both ends of the roller shaft (1) are opposite.

4. The passive shaft according to claim 1, characterized in that: The shaft sleeve (2) comprises a second step portion (21) and a shaft neck portion (22); the outer diameter of the second step portion (21) is equal to the outer diameter of the first step portion (11) and is larger than the outer diameter of the shaft neck portion (22).

5. The passive shaft according to claim 4, characterized in that: Two tongues and grooves (23) are provided on the circumferential surface of one end of the shaft neck (22) away from the second step portion (21), and the two tongues and grooves (23) are arranged opposite to each other along the radial direction of the shaft neck (22).

6. The passive shaft according to claim 4, characterized in that: The locking assembly includes a hoop (31) and a bolt (32). The hoop (31) is provided with a circular through hole (311). The circular through hole (311) is sleeved on the outer circumference of the first step portion (11) and the second step portion (21). One side of the hoop (31) is provided with an opening connected to the circular through hole (311). Both sides of the opening are provided with threaded holes that are connected to each other. The bolt (32) is inserted into the two threaded holes in sequence and is threadedly connected to the threaded holes to lock the hoop (31).

7. The passive shaft according to claim 6, characterized in that: A positioning boss (312) is provided on the end surface of the hoop (31) on the side facing away from the roller shaft (1).

8. The passive shaft according to claim 7, characterized in that: Along the axial direction of the passive shaft, the end face of the positioning boss (312) is located between the two end faces of the second step portion (21), and the outer diameter of the positioning boss (312) is smaller than the outer diameter of the body of the clamp (31).

9. The passive shaft according to claim 1, characterized in that: A convex edge (13) is provided on each of the two end surfaces of the roller shaft (1). The convex edge (13) is annular and coincides with the axis of the roller shaft (1) and has the same outer diameter.

10. A belt conveyor, characterized in that: It comprises the passive roller and the bearing according to any one of claims 1 to 9, wherein the sleeve (2) is at least partially inserted into the bearing.

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