Spiral conveying device

Abstract

The utility model relates to the technical field of spiral conveying, in particular to a spiral conveying device. The screw assembly comprises a screw and a screw driving shaft, the screw is rotatably arranged on the rotary supporting assembly, one end of the screw driving shaft is connected with the screw, and the other end of the screw driving shaft is provided with a first shaft section, a second shaft section and a third shaft section; the limiting plate is fixedly arranged relative to the rotary supporting assembly; the limiting plate is provided with a limiting groove, the second shaft section is sleeved with the limiting plate through the limiting groove, and the limiting plate is located between the two limiting faces; the thrust bearing is arranged in the first shaft section of the screw rod assembly; the thrust bearing abuts against the position between the limiting plate and the first shaft shoulder. According to the spiral conveying device, direct contact between the screw assembly and the limiting plate is avoided, and then the end of the screw assembly is prevented from being abraded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screw conveying, in particular to a screw conveying device. BACKGROUND

[0002] The screw conveying device is a mechanical device that pushes the material to move to realize conveying by driving the screw to rotate through a power source.

[0003] In a known implementation, the screw conveying device includes a motor, a screw assembly connected to the output shaft of the motor and configured to be rotatable, and a limiting plate arranged at the end of the screw assembly and used to axially limit the screw assembly. When the screw conveying device is running, the motor drives the screw assembly to rotate, so that the screw groove on the circumferential surface of the screw assembly carries the material to move along the axial direction of the screw assembly, while the screw assembly is subjected to the reaction force from the material along the axial direction of the screw assembly, so that the screw assembly is offset in the axial direction, and finally the end of the screw assembly moves relative to the limiting plate, causing the end of the screw assembly to wear. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a screw conveying device to avoid wear of the end of the screw assembly.

[0005] To achieve the above-mentioned purpose, the present application provides a screw conveying device, comprising:

[0006] a rotating support assembly;

[0007] a screw assembly, comprising a screw and a screw driving shaft, the screw being rotatably arranged on the rotating support assembly, one end of the screw driving shaft being connected to the screw, the other end of the screw driving shaft being provided with a first shaft section, a second shaft section and a third shaft section, the first shaft section, the second shaft section and the third shaft section being arranged in sequence in the direction away from the screw, the first shaft section having a first shaft shoulder close to the screw, the diameter of the second shaft section being smaller than the diameter of the first shaft section and the diameter of the third shaft section, so as to form limiting surfaces at both ends of the second shaft section, the diameter of the third shaft section being smaller than or equal to the diameter of the first shaft section;

[0008] a limiting plate, the limiting plate being fixedly arranged relative to the rotating support assembly, the limiting plate being provided with a limiting groove, the limiting plate being sleeved on the second shaft section through the limiting groove, and the limiting plate being located between the two limiting surfaces; and

[0009] a thrust bearing, the thrust bearing being arranged in the first shaft section of the screw assembly;

[0010] wherein the thrust bearing is arranged between the limiting plate and the first shaft shoulder.

[0011] Compared with the prior art, the embodiments of the present application at least have the following beneficial effects:

[0012] When the screw assembly is axially offset, the thrust bearing is clamped between the first shaft shoulder and the limiting plate, avoiding direct contact between the screw drive shaft and the limiting plate, and further avoiding wear of the screw drive shaft. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A cross-sectional view of a screw conveying device according to an embodiment of the present application is shown.

[0014] Figure 2 A schematic view of a screw drive shaft according to an embodiment of the present application is shown.

[0015] Figure 3 A schematic view of a limiting plate according to an embodiment of the present application is shown.

[0016] In the drawings:

[0017] 10, rotary support assembly;

[0018] 20, screw assembly; 21, screw; 211, helical groove; 22, screw drive shaft; 221, first shaft section; 222, second shaft section; 223, third shaft section; 224, shaft body; 225, first shaft shoulder; 226, limiting surface;

[0019] 40, transmission assembly; 41, first pulley;

[0020] 50, thrust bearing;

[0021] 60, limiting plate; 61, limiting groove; 62, connecting hole;

[0022] 70, fixing ring. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be further described below in conjunction with the drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all.

[0024] In the present application, some orientation words are defined. Without making the opposite statement, the orientation words used such as "up", "down", "left", "right", "inner", "outer" are used for the convenience of understanding, and thus do not constitute a limitation on the protection scope of the present application.

[0025] In the present application, unless specifically defined and limited otherwise, the "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The "under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0026] In the description of the present application, unless specifically defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] As shown in Figure 1 , the screw conveying device of the embodiment of the present application comprises a rotating support assembly 10 and a screw assembly 20.

[0028] As an example, the rotating support assembly 10 can be a fixedly arranged component such as a rack, a bearing seat, etc. The number of rotating support assemblies 10 can be two, and the screw assembly 20 is installed between the two rotating support assemblies 10. The rotating support assembly 10 can have a mounting hole to facilitate the installation of the screw assembly 20 to the rotating support assembly 10.

[0029] It should be noted that in the embodiment of the present application, the axis of the mounting hole extends in the horizontal direction as an example to illustrate the specific structure of the screw conveying device. However, in other embodiments not shown, the axis of the mounting hole can also be inclined or extend along the vertical direction.

[0030] As shown in Figure 1 , the screw assembly 20 is rotatably arranged in the mounting hole of the rotating support assembly, for example, the screw assembly 20 is rotatably mounted to the mounting hole through a bearing (not shown).

[0031] In Figure 1 , the axis of the screw assembly 20 coincides with the axis of the mounting hole. That is, the axis of the screw assembly 20 extends in the horizontal direction.

[0032] As an example, the screw assembly 20 can include a screw 21 and a screw drive shaft 22, an end of the screw 21 can be mounted on the rotating support assembly, and the screw drive shaft 22 is arranged at the end of the screw 21 and fixedly arranged with the screw 21, so that the screw 21 and the screw drive shaft 22 can rotate synchronously.

[0033] The axis of the screw 21 and the axis of the screw drive shaft 22 can be parallel to each other or coincide with each other.

[0034] The screw 21 can be rotatably mounted in the mounting hole through a bearing. The screw drive shaft 22 can be connected to the rotating drive assembly, so as to drive the screw 21 to rotate in the mounting hole.

[0035] The diameter of the screw 21 can be greater than the diameter of the screw drive shaft 22, so that the screw drive shaft 22 is inserted in the screw 21. However, in other embodiments not shown, the diameter of the screw 21 can also be smaller than the diameter of the screw drive shaft 22, so that the screw 21 is inserted in the screw drive shaft 22.

[0036] As shown in Figure 1 , the screw conveyor can further include a rotating drive assembly (not shown). The rotating drive assembly is connected to the screw assembly 20, for example, connected to the screw drive shaft 22, so as to drive the screw assembly 20 to rotate around the axis.

[0037] As an example, the rotating drive assembly can include a motor (not shown), and an output shaft of the motor is connected to the screw assembly 20, so as to automatically drive the screw assembly 20 to rotate.

[0038] As shown in Figure 1 , the screw conveyor can further include a transmission assembly 40. The transmission assembly 40 is connected between the rotating drive assembly and the screw assembly 20.

[0039] As an example, the transmission assembly 40 can be a belt transmission assembly, so as to transmit the rotating motion of the rotating drive assembly to the screw assembly 20. Specifically, the transmission assembly 40 can include a first pulley 41, a second pulley, and a belt, the first pulley 41 is connected to the screw drive shaft 22, the second pulley is connected to the rotating drive assembly, and the belt is connected between the first pulley 41 and the second pulley.

[0040] As shown in Figure 1 , the circumferential surface of the screw assembly 20 or the screw 21 is provided with a helical groove 211 for pushing the material (not shown) to move along the axis of the screw assembly 20. Specifically, when the screw assembly 20 rotates around its own axis, the helical groove 211 rotates correspondingly, so that the material in the helical groove 211 moves, and as a result, the material moves along the axis of the screw assembly 20.

[0041] It can be understood that the material is subjected to the force of the screw assembly 20 and thus moves axially, so the material also exerts a reaction force on the screw groove 211, the direction of the reaction force is parallel to the axial direction of the screw assembly 20 and opposite to the moving direction of the material, under the action of the reaction force, the screw assembly 20 will move slightly axially, that is, the shaft will be offset. Figure 1 The direction of the shaft offset is shown in the middle of the figure.

[0042] As Figure 1 shown, the screw conveyor further comprises a limiting plate 60 and a thrust bearing 50. The limiting plate 60 is used for axial limiting of the screw assembly 20. The thrust bearing 50 is used to avoid direct contact between the screw assembly 20 and the limiting plate 60, thereby avoiding wear of the screw assembly 20, especially the screw drive shaft 22.

[0043] As Figure 2 shown, the screw drive shaft 22 comprises a shaft body 224, a first shaft section 221, a second shaft section 222 and a third shaft section 223, one end of the shaft body 224 is connected with the screw 21, the other end of the shaft body 224 is connected with the first shaft section 221, and the second shaft section 222 is connected between the first shaft section 221 and the third shaft section 223. That is, the first shaft section 221, the second shaft section 222 and the third shaft section 223 are arranged in sequence in the direction away from the screw 21.

[0044] As Figure 2 shown, the diameter of the first shaft section 221 is smaller than the diameter of the shaft body 224, so that a first shaft shoulder 225 is formed at the connection between the first shaft section 221 and the shaft body 224, that is, the first shaft section 221 has a first shaft shoulder 225 close to the screw. The thrust bearing 50 is arranged on the first shaft section 221, and the side of the thrust bearing 50 close to the screw 21 abuts against the first shaft shoulder 225.

[0045] As Figure 2 shown, the diameter of the second shaft section 222 is smaller than the diameter of the first shaft section 221, and the diameter of the second shaft section 222 is smaller than the diameter of the third shaft section 223, so that a radially extending limiting surface 226 is formed at the connection between the second shaft section 222 and the first shaft section 221 and at the connection between the second shaft section 222 and the third shaft section 223 respectively. The limiting plate 60 is sleeved on the second shaft section 222 through the limiting groove 61, and is located between the two limiting surfaces 226, that is, the limiting plate 60 is limited in the second shaft section 222, and the limiting plate 60 cannot enter the first shaft section 221 and / or the third shaft section 223 by moving the limiting plate axially. In addition, the thrust bearing 50 is abutted between the limiting plate 60 and the first shaft shoulder 225.

[0046] As Figure 2As shown, the diameter of the third shaft segment 223 is less than or equal to the diameter of the first shaft segment 221, so that the thrust bearing 50 can pass through the third shaft segment 223 and the second shaft segment 222 to reach the first shaft segment 221.

[0047] In combination Figure 1 and Figure 2 As shown, the limit plate 60 is fixedly arranged relative to the rotary support assembly, and along the axial offset direction of the screw assembly 20, the first shaft shoulder 225, the thrust bearing 50, and the limit plate 60 are arranged in sequence. When the screw assembly 20 is axially offset, the first shaft shoulder 225 moves to the left, the first shaft shoulder 225 contacts the right side surface of the thrust bearing 50, and exerts a leftward force on the right side surface of the thrust bearing 50, so that the thrust bearing 50 moves to the left, and then the left side surface of the thrust bearing 50 abuts against the right side surface of the limit plate 60. The limit plate 60 limits the thrust bearing 50 from continuing to move to the left. At this time, the thrust bearing 50 is clamped between the first shaft shoulder 225 and the limit plate 60, and the limit plate 60 and the first shaft shoulder 225 do not directly contact each other, but indirectly contact each other through the thrust bearing 50, thereby avoiding wear of the screw assembly 20, especially the screw drive shaft 22.

[0048] As shown in Figure 1 The thrust bearing 50 includes a first side surface (i.e., the right side surface in Figure 1 ) close to the screw and a second side surface (i.e., the left side surface in Figure 1 ) away from the screw. The first side surface can abut against the first shaft shoulder 222, and the second side surface can abut against the limit plate 60.

[0049] As shown in Figure 3 The limit plate 60 further includes a connecting hole 62. A connecting member (e.g., a screw) passes through the connecting hole 62 and is connected to the rotary support assembly 10, so that the limit plate 60 is fixedly arranged on the rotary support assembly 10.

[0050] The limit slot 61 has an opening. The size of the opening allows the second shaft segment 222 to enter the limit slot 61. Specifically, the size of the opening can be greater than the diameter of the second shaft segment 222, so that the second shaft segment 222 can pass through the opening and enter the limit slot 61.

[0051] In the axial direction of the screw drive shaft 22, the limit surface 226 at least partially overlaps the limit plate 60, so that the limit plate 60 is limited within the second shaft segment 222. Specifically, the size of the limit slot 61 can be less than the diameter of the first shaft segment 221 and less than the diameter of the third shaft segment 223, so that the limit plate 60 is limited within the second shaft segment 222.

[0052] As shown in Figure 1 and Figure 2As shown, the screw conveying device further comprises a fixed ring 70 fixedly arranged on the shaft body 224, and the thrust bearing 50 abuts against the fixed ring 70 on the side close to the screw rod 21.

[0053] Although the present application has been described in detail with general description, specific embodiments and experiments, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, all belong to the scope of the present application claimed.

Claims

1. A screw conveyor, characterized in that, include: Rotary support assembly (10); A screw assembly (20) includes a screw (21) and a screw drive shaft (22). The screw (21) is rotatably mounted on the rotary support assembly (10). One end of the screw drive shaft (22) is connected to the screw (21), and the other end of the screw drive shaft (22) is provided with a first shaft segment (221), a second shaft segment (222), and a third shaft segment (223). The first shaft segment (221), the second shaft segment (222), and the third shaft segment (223) extend along the distal... The shaft segments are arranged sequentially in the direction away from the screw (21), the first shaft segment (221) has a first shoulder (225) near the screw, the diameter of the second shaft segment (222) is smaller than the diameter of the first shaft segment (221) and the diameter of the second shaft segment (222) is smaller than the diameter of the third shaft segment (223), so as to form a limiting surface (226) at both ends of the second shaft segment (222), and the diameter of the third shaft segment (223) is smaller than or equal to the diameter of the first shaft segment (221); A limiting plate (60) is fixedly disposed relative to the rotating support assembly (10). The limiting plate (60) is provided with a limiting groove (61). The limiting plate (60) is sleeved on the second shaft segment (222) through the limiting groove (61), and the limiting plate (60) is located between the two limiting surfaces (226). A thrust bearing (50) is disposed within the first shaft section (221) of the screw assembly (20); The thrust bearing (50) abuts against the limiting plate (60) and the first shoulder (225).

2. The screw conveyor according to claim 1, characterized in that, The screw conveyor also includes: A rotary drive assembly connected to the screw assembly (20) to drive the screw to rotate about its own axis.

3. The screw conveyor according to claim 2, characterized in that, The screw conveyor also includes: A transmission assembly (40) is connected between the rotary drive assembly and the screw assembly (20).

4. The screw conveyor according to claim 1, characterized in that, The screw conveyor also includes a retaining ring (70), and the screw drive shaft (22) also includes a shaft body (224). One end of the shaft body (224) is connected to the screw (21), and the other end of the shaft body (224) is connected to the first shaft segment (221). The retaining ring (70) is fixedly mounted on the shaft body (224), and the thrust bearing (50) abuts against the retaining ring (70) on the side near the screw (21).

5. The screw conveyor according to any one of claims 1 to 4, characterized in that, The thrust bearing (50) includes: A first side surface, the first side surface being the surface adjacent to the screw (21); and The second side is the surface away from the screw (21); The first side can abut against the first shoulder (225), and the second side can abut against the limiting plate (60).

6. The screw conveyor according to any one of claims 1 to 4, characterized in that, The limiting groove (61) has an opening, the size of which allows the second shaft segment (222) to enter the limiting groove (61).

7. The screw conveyor according to any one of claims 1 to 4, characterized in that, In the axial direction of the screw drive shaft (22), the limiting surface (226) at least partially overlaps with the limiting plate (60) so that the limiting plate (60) is confined within the second shaft segment (222).

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