Spherical intermediate support structure for screw shaft

Abstract

The utility model discloses a spherical middle supporting structure for a screw shaft, which comprises a supporting shaft, an arc-shaped wear-resistant surface is annularly arranged in the middle of the supporting shaft, and flanges for connecting the screw shaft are fixed at two ends of the supporting shaft; the bearing bush assembly is located on the periphery of the arc-shaped wear-resisting face, and the supporting shaft and the bearing bush assembly rotate relative to each other; a bearing bush seat is fixed on the hanger, the bearing bush seat is fixedly connected with the bearing bush assembly, the hanger, the bearing bush seat and the bearing bush assembly provide bearing points for a bearing shaft, and the eccentric transmission device is simple in structure, provides a middle support for a long-distance screw shaft, and can also realize eccentric transmission of the screw shafts at two ends.

Description

Technical Field

[0001] This utility model belongs to the field of large-span spiral shaft transmission technology, specifically relating to a spherical intermediate support structure for a spiral shaft. Background Technology

[0002] When the length of the helical shaft is too long, the rigidity of a single helix cannot meet the usage requirements, so an intermediate support point is added in the middle. The traditional intermediate support point is achieved by adding a bearing to the intermediate support shaft. If the helix length is too long and the front and rear helices are not concentric, since the traditional intermediate support shaft is cylindrical and fixed, the torque caused by the misalignment of the front and rear helical shafts can only be borne by the intermediate support bearing, which can easily lead to the breakage of the intermediate support shaft.

[0003] Therefore, how to provide a spherical intermediate support structure for a helical shaft is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a spherical intermediate support structure for a helical shaft, which avoids the problem of shaft breakage caused by eccentricity at both ends during long-distance helical shaft transmission, and can also realize eccentricity compensation for long-distance helical shaft transmission.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a spherical intermediate support structure for a spiral shaft, comprising:

[0006] The support shaft has an arc-shaped wear-resistant surface in the middle, and flanges for connecting the spiral shaft are fixed at both ends of the support shaft.

[0007] A bearing assembly, the bearing assembly being located on the outer periphery of the arc-shaped wear-resistant surface, and the support shaft rotating relative to the bearing assembly;

[0008] The device includes a suspension system with a bearing seat fixed to it. The bearing seat is fixedly connected to the bearing assembly. The suspension system, bearing seat, and bearing assembly provide a bearing point for the support shaft.

[0009] The beneficial effects of this utility model are as follows: The support shaft is used to connect two spiral shafts to achieve the purpose of long-distance spiral conveying or transmission. The spiral shaft can be used as a spiral auger for long-distance material conveying. The arc-shaped wear-resistant surface design can compensate for the eccentric angle at both ends of the spiral shaft when it rotates over a long distance. Compared with a cylindrical intermediate support shaft, it is not easy to break. In addition, the long-distance spiral conveying uses the support shaft and bearing assembly and the hanging to avoid large deflection changes in long-distance spiral conveying, effectively providing intermediate support and improving the reliability of long-distance spiral conveying or transmission.

[0010] Preferably, the arc-shaped wear-resistant surface has a plurality of carbide pillar mounting holes spaced apart in the middle and corresponding circumferential direction. Carbide pillars are installed in the carbide pillar mounting holes and slide in contact with the inner sidewall of the bearing assembly.

[0011] The resulting technical effect is that carbide column mounting holes are provided on the arc-shaped wear-resistant surface, and the bearing-type sliding connection between the support shaft and the bearing assembly is realized by using the carbide columns.

[0012] Preferably, the bearing assembly includes two sets of half bearings, and the half bearings are provided with a plurality of connecting holes for connecting to the bearing seat.

[0013] The resulting technical effect is that the two sets of half-bearing shells are easy to assemble, and the half-bearing shells can be installed onto the bearing shell seat using bolts.

[0014] Preferably, two half-bearing bushes cooperate to form a bushing structure. The inner sidewall of the half-bearing bushes is provided with multiple embedding holes. A hard alloy wear-resistant block is fixedly connected in the embedding holes. The hard alloy wear-resistant block can slide in contact with the arc-shaped wear-resistant surface.

[0015] The resulting technical effect is that the embedded holes are used to install wear-resistant blocks, which are specifically fixed in the corresponding holes by copper welding. When the two ends of the spiral shaft are eccentric, the half-shaft bushing slides in contact with the arc-shaped wear-resistant surface, which does not affect the transmission effect of the spiral shaft, and the middle support shaft is not easily twisted off.

[0016] Preferably, the embedded hole is a frustum hole, and the cemented carbide wear-resistant block has a frustum structure.

[0017] The resulting technical effect is that the frustum hole can be matched with the frustum-shaped wear-resistant block, making the wear-resistant block and the half-bearing bushing stable and not easy to dislodge. The cemented carbide has a strong wear resistance, long service life and is not easy to wear. The specific bearing bush can also be made of cemented carbide.

[0018] Preferably, the large end of the cemented carbide wear-resistant block is close to the inner side of the half-shaft bearing, and the large end face of the cemented carbide wear-resistant block extends a certain distance beyond the inner wall of the half-shaft bearing.

[0019] The resulting technical effect is that the wear-resistant block first bears the friction and wear of the component, avoiding direct friction and wear of the component on the inner wall surface of the half-shaft bearing, thereby extending the service life of the component. Attached Figure Description

[0020] Figure 1 This is an assembly drawing of a spherical intermediate support structure for a spiral shaft according to the present invention;

[0021] Figure 2 This is a schematic diagram of a spherical intermediate support structure for a spiral shaft according to the present invention;

[0022] Figure 3 This is a structural diagram of a half-bearing bush of a spherical intermediate support structure for a spiral shaft according to this utility model;

[0023] Figure 4 for Figure 3 Cross-sectional view;

[0024] Figure 5 for Figure 3 An exterior illustration.

[0025] 1 Support shaft, 2 Arc-shaped wear-resistant surface, 3 Flange, 4 Spiral shaft, 5 Bearing assembly, 51 Half bearing, 52 Carbide wear-resistant block, 53 Connecting hole, 6 Hanger, 7 Bearing seat, 8 Carbide column mounting hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] See appendix to this utility model Figures 1 to 5 According to an embodiment of the present invention, a spherical intermediate support structure for a spiral shaft includes:

[0028] The support shaft 1 has an arc-shaped wear-resistant surface 2 in the middle. Both ends of the support shaft 1 are fixed with flanges 3 for connecting the screw shaft 4. The connection with the screw shaft is achieved through the flanges. In specific applications, the screw shaft can be a screw conveyor auger for conveying materials.

[0029] The bearing assembly 5 is located on the outer periphery of the arc-shaped wear-resistant surface 2. The support shaft 1 rotates relative to the bearing assembly 5. Unlike the cylindrical shaft, when the cylindrical shaft rotates eccentrically at the ends of the two helical shafts, the intermediate support shaft is fixed in a column shape and can only be subjected to the torque caused by the eccentricity of the front and rear helical shafts by the intermediate support bearing, which can lead to the breakage of the intermediate support shaft. The bearing assembly does not restrict the arc-shaped wear-resistant surface of the support shaft in the axial direction.

[0030] The suspension 6 has a bearing seat 7 fixed on it. The bearing seat 7 is fixedly connected to the bearing assembly 5. The suspension 6, bearing seat 7 and bearing assembly 5 provide the bearing point for the support shaft 1, improving the stability of the long-distance spiral shaft transmission structure.

[0031] In other embodiments, the arc-shaped wear-resistant surface 2 has a plurality of carbide column mounting holes 8 spaced apart in the middle and corresponding circumferential direction. Carbide columns are installed in the carbide column mounting holes 8. The carbide columns are slidably connected to the inner sidewall of the bearing assembly 5. It can be understood that the intermediate support shaft, together with the carbide columns and the bearing assembly, constitutes a bearing structure, so that when the intermediate support shaft rotates with the helical shaft, it will not affect the installation of the bearing assembly.

[0032] In some other embodiments, the bearing assembly 5 includes two sets of half bearings 51. The half bearings 51 are provided with a plurality of connecting holes 53 for connecting the bearing seat 7. The half bearings are easy to assemble with the intermediate support shaft and the bearing seat. The plurality of connecting holes are spaced apart in the middle circumferential direction to facilitate the installation of the half bearings and the bearing seat by fasteners, while preventing the half bearings from rotating with the intermediate support shaft.

[0033] In some other specific embodiments, two half-bearing bushes 51 cooperate to form a bushing structure. The inner sidewall of the half-bearing bushes 51 is provided with multiple embedding holes. Hard alloy wear-resistant blocks 52 are fixedly connected in the embedding holes. The hard alloy wear-resistant blocks 52 can slide in contact with the arc-shaped wear-resistant surface 2.

[0034] In some other specific embodiments, the embedding hole is a frustum hole, and the cemented carbide wear-resistant block 52 has a frustum structure. During installation, the wear-resistant block is fixed in the embedding hole by copper welding. The frustum structure of the wear-resistant block can improve the load-bearing capacity and also ensure the installation position of the wear-resistant block. The cemented carbide wear-resistant block has strong wear resistance and is not easy to wear, thereby improving the service life of the component.

[0035] In some other embodiments, the larger end of the wear-resistant block 52 is close to the inner side of the half-bearing bush 51, and the larger end face of the wear-resistant block 52 extends out of the inner sidewall of the half-bearing bush by a certain distance of 0.25 to 1 mm. This allows for preferential friction and wear of the wear-resistant block, thereby reducing the frictional wear of the component on the bearing bush.

[0036] The intermediate support spherical structure of this device can be used for self-alignment compensation when the ends of the front and rear helical shafts are not concentric, avoiding the breakage of the intermediate support shaft. At the same time, the intermediate support structure can strengthen the structural strength of the large-span shaft and ensure the transmission stability of the large-span shaft.

[0037] The apparatus and methods disclosed in the embodiments are described simply because they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the method section.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spherical intermediate support structure for a helical shaft, characterized in that, include: The support shaft (1) has an arc-shaped wear-resistant surface (2) in the middle, and flanges (3) for connecting the spiral shaft (4) are fixed at both ends of the support shaft (1). A bearing assembly (5) is located on the outer periphery of the arc-shaped wear-resistant surface (2), and the support shaft (1) rotates relative to the bearing assembly (5). A suspension (6) is provided, on which a bearing seat (7) is fixed. The bearing seat (7) is fixedly connected to the bearing assembly (5). The suspension (6), bearing seat (7) and bearing assembly (5) provide the bearing point for the support shaft (1).

2. The spherical intermediate support structure for a helical shaft according to claim 1, characterized in that, The arc-shaped wear-resistant surface (2) has a plurality of carbide column mounting holes (8) spaced apart in the middle and corresponding circumferential direction. Carbide columns are installed in the carbide column mounting holes (8) and the carbide columns slide in contact with the inner sidewall of the bearing assembly (5).

3. The spherical intermediate support structure for a helical shaft according to claim 2, characterized in that, The cross-section of the hard alloy column mounting hole (8) is circular or elongated.

4. The spherical intermediate support structure for a helical shaft according to claim 2, characterized in that, The bearing assembly (5) includes two sets of half bearings (51), and the half bearings (51) are provided with a plurality of connecting holes (53) for connecting the bearing seat (7).

5. A spherical intermediate support structure for a helical shaft according to claim 2, characterized in that, Two half-bearing bushes (51) cooperate to form a bushing structure. The inner sidewall of the half-bearing bushes (51) is provided with multiple embedding holes. A hard alloy wear-resistant block (52) is fixedly connected in the embedding hole. The hard alloy wear-resistant block (52) can slide in contact with the arc-shaped wear-resistant surface (2).

6. The spherical intermediate support structure for a helical shaft according to claim 5, characterized in that, The embedded hole is a frustum hole, and the cemented carbide wear-resistant block (52) has a frustum structure.

7. A spherical intermediate support structure for a helical shaft according to claim 6, characterized in that, The large end of the cemented carbide wear-resistant block (52) is close to the inner side of the half-shaft bearing (51), and the large end face of the cemented carbide wear-resistant block (52) extends a certain distance from the inner sidewall of the half-shaft bearing.

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