A connection structure between the bucket wheel shaft and the bucket body of a material reclaimer

Abstract

This application discloses a connection structure between the bucket wheel shaft and the bucket body of a stacker-reclaimer, relating to the field of stacker-reclaimer technology. It includes a bucket wheel body and a bucket wheel shaft, connected by expansion sleeves. Expansion sleeves are respectively located on the left and right sides of the connection between the bucket wheel body and the bucket wheel shaft. A sealing end cap is provided on the outer side of the right expansion sleeve, while a split sleeve and a positioning sleeve are sequentially arranged on the outer side of the left expansion sleeve. Both the split sleeve and the positioning sleeve are fitted onto the bucket wheel shaft. The technical advantages of this application are: the double expansion sleeve design transmits axial force, radial force, bending moment, and torque. The torque transmission coefficient, axial force transmission coefficient, force transmission coefficient, and radial pressure coefficient of this scheme are all greater than the safety factor used, resulting in higher safety and durability; the detachable split sleeve allows for quick installation of the left expansion sleeve, while the expanded diameter ensures axial stability and achieves sealing of the left expansion sleeve; and the sealing end cap and baffle seal the right expansion sleeve and the bucket wheel shaft.

Description

Technical Field

[0001] This application relates to the field of stacking and reclaiming equipment technology, and in particular to a connection structure between the bucket wheel shaft and the bucket body of a reclaimer. Background Technology

[0002] The bucket wheel shaft of the reclaimer is a core component of bulk material handling equipment. One end is connected to the bucket wheel reducer to receive and transmit power, while the other end supports the bucket wheel body, enabling it to dig materials at a stable speed. It is typically forged from high-strength alloy structural steel such as 40CrNiMo, and undergoes heat treatment to improve its comprehensive mechanical properties, allowing it to withstand complex loads such as material impact and centrifugal force. The shaft body is designed with a variable diameter structure, a design that fully considers mechanical principles and practical working requirements. Different parts of the bucket wheel shaft experience different stresses in varying magnitudes and directions; the variable diameter structure allows the shaft to meet strength requirements while reasonably reducing its weight and material costs. At the connection between the shaft and the bucket wheel body, the drive unit drives the bucket wheel shaft to rotate, and the bucket wheel shaft drives the bucket wheel body to rotate through a splined pair with the gear sleeve. The bucket wheel shaft and bucket wheel body are connected by involute internal and external splines to transmit torque. The two positioning connections between the bucket wheel shaft and the gear sleeve serve both as centering points and as support points for bending moment loads.

[0003] In existing spline connection methods, machining the spline shaft requires specialized machine tools. Before machining, a machining process needs to be developed, and test templates need to be made based on different tooth counts, modules, and wire cutting. Rough machining is performed first, followed by finish machining to achieve the required precision. Furthermore, the external spline of the bucket wheel shaft and the internal spline of the wheel body are machined separately, and pre-assembly is required after machining. This necessitates the production of the bucket wheel shaft and wheel body in the same machining workshop, and the selection of the workshop location must meet the machining requirements, thus affecting production planning and schedule. Spline connections are purely mechanical connections, with a relatively loose key fit, leaving gaps. When the shaft end baffle becomes loose, dust can enter, causing key wear. If key teeth are damaged or severely worn during application, causing the key drive to malfunction, the spline shaft and key need to be replaced. The shaft and key need to be re-machined as needed, and replacement and installation are complex projects. Therefore, there is an urgent need for an alternative connection structure between the bucket wheel shaft and the bucket wheel body to replace the existing spline structure, improving durability and ease of replacement. Summary of the Invention

[0004] This device provides a connection structure between the bucket wheel shaft and the bucket body of a material reclaimer, and the specific implementation method is as follows:

[0005] Bucket wheel body and bucket wheel axle;

[0006] The two are connected by an expansion sleeve;

[0007] The expansion sleeves are respectively located on the left and right sides of the connection between the bucket wheel body and the bucket wheel shaft. The outer side of the right expansion sleeve is provided with a sealing end cap, and the outer side of the left expansion sleeve is provided with a split sleeve and a positioning sleeve in sequence. Both the split sleeve and the positioning sleeve are fitted onto the bucket wheel shaft, and the expansion sleeves on both sides are sealed by the split sleeve and the sealing end cap.

[0008] Based on the above technical solutions, the double-sided arrangement and sealing design of the expansion sleeve at the connection between the bucket wheel body and the bucket wheel shaft makes the connection force more uniform, effectively improves the torque transmission capacity, can better cope with the complex load during material handling operations, and enhances the overall structural stability; the right sealing end cover combined with the left split sleeve and positioning sleeve for sealing can prevent dust, material particles and water vapor from entering, avoid wear or corrosion of the expansion sleeve and bucket wheel shaft due to impurities, and extend the service life of the components.

[0009] Optionally, the split sleeve is a split structure, which includes a first arc plate and a second arc plate, which are clamped to the bucket wheel shaft by bolts.

[0010] Preferably, the side of the split sleeve facing the expansion sleeve is flared, and its diameter is wider than the installation position of the expansion sleeve.

[0011] Based on the above technical solutions, the split sleeve is easy to install and disassemble, and there is no need to completely disassemble the bucket wheel shaft and bucket wheel body during maintenance, which greatly reduces maintenance difficulty and downtime; the positioning sleeve provides positioning for the expansion sleeve, ensuring assembly accuracy, ensuring coaxiality during equipment operation, reducing vibration and noise, and improving the reliability and efficiency of the reclaimer.

[0012] Preferably, a drive unit is connected to one end of the bucket wheel shaft, and a bearing seat is provided on the bucket wheel shaft.

[0013] Preferably, the positioning sleeve is cylindrical, with its two ends abutting against the bearing seat and the split sleeve, respectively.

[0014] Preferably, a baffle is provided at the other end of the bucket wheel axle.

[0015] Based on the above technical solution, at the left expansion sleeve position, the split sleeve facing the expansion sleeve is designed with a flared shape and the diameter is wider than the expansion sleeve installation position. This can effectively prevent the split sleeve from acting axially on the expansion sleeve during operation. The buffer space formed by the flared opening allows for a moderate gap between the split sleeve and the expansion sleeve in the axial direction. When the reclaimer operates and generates vibration, impact, or slight displacement between components, the split sleeve will not directly squeeze the expansion sleeve due to axial force, preventing the expansion sleeve from being deformed or loosened due to additional axial stress, further improving the stability and safety of the reclaimer operation.

[0016] Preferably, the first arc-shaped plate and the second arc-shaped plate are interlocked in a stepped, staggered manner.

[0017] Preferably, the bucket wheel body is rotatably mounted on the bucket wheel body support.

[0018] In summary, this application includes the following beneficial technical effects:

[0019] 1. This utility model directly supports the entire bucket wheel body on the double expansion sleeve through the double expansion sleeve design. The expansion sleeve bears axial force, radial force, and bending moment, and transmits torque. The torque transmission coefficient, axial force transmission coefficient, force transmission coefficient, and radial pressure coefficient of this solution are all greater than the safety factor used, resulting in higher safety and durability.

[0020] 2. By setting a detachable split sleeve, this utility model not only satisfies the need for quick installation of the left expansion sleeve, but also achieves a seal on the left expansion sleeve while ensuring axial stability through the expanded diameter.

[0021] 3. This utility model has a simple structure. By setting a sealing end cover and a baffle, the right side expansion sleeve and bucket wheel shaft are sealed. Attached Figure Description

[0022] Figure 1 It is a cross-sectional view of the structure from the front using existing technology;

[0023] Figure 2 This is a cross-sectional view of the front structure of this utility model;

[0024] Figure 3 This is a utility model Figure 2 Enlarged view of the middle section structure;

[0025] Figure 4 This is a schematic diagram of the structure of the bearing housing and bucket wheel body in this utility model;

[0026] Figure 5 This is a schematic diagram of the expansion sleeve in this utility model;

[0027] Figure 6 This is a schematic diagram of the split sleeve in this utility model;

[0028] Figure 7 This is a schematic diagram of the structure after the application of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Bucket wheel shaft; 2. Positioning sleeve; 3. Split sleeve; 4. Sealing end cover; 5. Expansion sleeve; 6. Baffle; 7. Drive unit; 8. Bearing housing; 9. Bearing housing; 10. Bucket wheel body; 11. Spline.

[0031] 301. First arc-shaped plate; 302. Second arc-shaped plate; 303. Bolt; 304. Expanded diameter shape. Detailed Implementation

[0032] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0033] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0034] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0035] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0036] This application discloses a connection structure between the bucket wheel shaft and the bucket body of a material handling machine.

[0037] Example 1

[0038] Reference Figures 1 to 3 This embodiment discloses a connection structure between the bucket wheel shaft and the bucket body of a material handling machine, including a bucket wheel body 9 and a bucket wheel shaft 1, which are connected by an expansion sleeve 5. The expansion sleeve 5 is respectively provided on the left and right sides of the connection between the bucket wheel body 9 and the bucket wheel shaft 1. In this structure, the expansion sleeve 5 is a double expansion sleeve layout.

[0039] A drive unit 7 is connected to one end of the bucket wheel shaft 1, and a bearing seat 8 is provided on the bucket wheel shaft 1. The bucket wheel body 9 is rotatably mounted on the bucket wheel body support 10. In this structure, a double-sided expansion sleeve 5 is used instead of the single-sided spline 11 structure in the prior art.

[0040] Example 2

[0041] Reference Figures 2 to 7 This embodiment also discloses a connection structure between the bucket wheel shaft and the bucket body of the material handling machine. The shell is a split structure. The outer side of the right expansion sleeve 5 is provided with a sealing end cap 4. The outer side of the left expansion sleeve 5 is provided with a split sleeve 3 and a positioning sleeve 2 in sequence. The split sleeve 3 and the positioning sleeve 2 are both sleeved on the bucket wheel shaft 1. The two expansion sleeves 5 on both sides are sealed by the split sleeve 3 and the sealing end cap 4. In this structure, the positioning sleeve 2 is cylindrical, and its two ends abut against the bearing seat 8 and the split sleeve 3 respectively. The other end of the bucket wheel shaft 1 is provided with a baffle 6.

[0042] The split sleeve 3 is a split structure, which includes a first arc plate 301 and a second arc plate 302. The two are clamped to the bucket wheel shaft 1 by bolts 303. In this structure, the side of the split sleeve 3 facing the expansion sleeve 5 is set as an flared opening 304, and its diameter is wider than the installation position of the expansion sleeve 5. The first arc plate 301 and the second arc plate 302 can be cross-joined in a stepped staggered manner.

[0043] The specific implementation process is as follows: between the bucket wheel shaft 1 and the bucket wheel body 9, an expansion sleeve 5 is installed on the right side, followed by a sealing end cap 4; after the expansion sleeve 5 is installed on the left side, a split sleeve 3 is installed, and the positioning sleeve 2 is used to axially abut against the split sleeve 3; after clamping with bolts 303, Loctite anti-loosening adhesive is applied to prevent loosening, and during assembly, a sealing gasket is used to tightly adhere to the bucket wheel body 9; during operation, the split sleeve 3 will not directly act on the expansion sleeve 5.

[0044] When replacing later, simply remove bolt 303, remove the split sleeve 3, and perform maintenance on the left expansion sleeve 5; the right expansion sleeve 5 can be replaced simply by removing the sealing end cover 4.

[0045] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A connection structure between the bucket wheel shaft and the bucket body of a material reclaimer, characterized in that, include: Bucket wheel body (9) and bucket wheel axle (1); The two are connected by an expansion sleeve (5); The expansion sleeves (5) are respectively located on the left and right sides of the connection between the bucket wheel body (9) and the bucket wheel shaft (1). The outer side of the expansion sleeve (5) on the right side is provided with a sealing end cap (4). The outer side of the expansion sleeve (5) on the left side is provided with a split sleeve (3) and a positioning sleeve (2) in sequence. The split sleeve (3) and the positioning sleeve (2) are both sleeved on the bucket wheel shaft (1). The expansion sleeves (5) on both sides are sealed by the split sleeve (3) and the sealing end cap (4).

2. The connection structure between the bucket wheel shaft and the bucket body of a material reclaimer according to claim 1, characterized in that, The split sleeve (3) is a split structure, which includes a first arc plate (301) and a second arc plate (302), which are clamped to the bucket wheel shaft (1) by bolts (303).

3. The connection structure between the bucket wheel shaft and the bucket body of a material reclaimer according to claim 2, characterized in that, The split sleeve (3) is flared (304) on the side facing the expansion sleeve (5), and its diameter is wider than the installation position of the expansion sleeve (5).

4. The connection structure between the bucket wheel shaft and the bucket body of a material reclaimer according to claim 1, characterized in that, A drive unit (7) is connected to one end of the bucket wheel shaft (1), and a bearing seat (8) is provided on the bucket wheel shaft (1).

5. The connection structure between the bucket wheel shaft and the bucket body of a material reclaimer according to claim 4, characterized in that, The positioning sleeve (2) is cylindrical, with its two ends abutting against the bearing seat (8) and the split sleeve (3), respectively.

6. The connection structure between the bucket wheel shaft and the bucket body of a material reclaimer according to claim 5, characterized in that, A baffle (6) is provided at the other end of the bucket wheel shaft (1).

7. The connection structure between the bucket wheel shaft and the bucket body of a material reclaimer according to claim 3, characterized in that, The first arc-shaped plate (301) and the second arc-shaped plate (302) are interlocked in a stepped manner.

8. The connection structure between the bucket wheel shaft and the bucket body of a material reclaimer according to claim 1, characterized in that, The bucket wheel body (9) is rotatably mounted on the bucket wheel body support (10).

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