A fixing structure of a lengthened shaft sleeve of a slewing reducer of a reclaimer

Abstract

The utility model belongs to the drive technology field of reclaimer, and relates to a fixing structure for the extension shaft sleeve of the slewing reducer of reclaimer, including slewing steel structure platform, upper locating ring, lower locating ring and extension shaft sleeve, the upper locating ring is installed on the upper end surface of the upper slewing steel structure platform, the lower locating ring is installed on the lower slewing steel structure platform, the upper end of the extension shaft sleeve is connected on the upper locating ring through the cooperation of screw and nut after extending out the mounting hole of the upper end slewing steel structure platform, and the lower end of the extension shaft sleeve is inserted into the lower locating ring. The utility model installs the upper part of extension shaft sleeve on the upper end slewing steel structure platform, which is convenient for installation, facilitates daily overhaul and maintenance, and guarantees the stability of the inner drive shaft when impact load is encountered through the connection of bolt and the pressure connection of reducer.

Description

Technical Field

[0001] This utility model belongs to the field of material handling machine drive technology, and relates to a fixing structure for the extension shaft sleeve of the rotary reducer of the material handling machine. Background Technology

[0002] The QL6000.55 bucket wheel reclaimer features a slewing bearing-type support structure. Its slewing mechanism mainly consists of a drive reducer, a torque limiting coupling, a vertical planetary reducer, a drive pinion, and a slewing gear ring.

[0003] The working principle of the rotary mechanism is as follows: power is provided by a reducer, and force is transmitted through a coupling. A torque-limiting coupling protects the reducer from torque fluctuations, and a vertical planetary reducer drives the rotary gears for transmission. To balance the torque in the horizontal and vertical directions and the lifting torque, the rotary reducer has two positioning rings: the upper positioning ring secures the main body of the rotary reducer, and the lower positioning ring secures the reducer extension sleeve, limiting its lateral twisting and ensuring vertical gear meshing.

[0004] During operation, the material reclaimer experiences constant fluctuations in material reclaiming volume due to stratification of the material pile or unstable reclaiming rate. Consequently, uneven force transmission occurs at the gear meshing part of the rotary mechanism. When the rotary mechanism starts or stops, a huge rotational inertial torque is generated. Due to the small clearance between the lower positioning ring and the extension sleeve, coupled with the impact of the force during gear meshing, a certain shearing force is generated on the sleeve structure, causing the flange connecting bolts of the extension shaft sleeve to break. Since the bolt connection part is not easily observed inside the reclaimer's housing structure, in severe cases, the sleeve may fall off, causing machine damage and affecting production operations. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a fixing structure for the extension shaft sleeve of the rotary reducer of the material handling machine.

[0006] The technical problem solved by this utility model is achieved through the following technical solution: A fixing structure for the extension shaft sleeve of a rotary reducer of a material handling machine includes a rotary steel structure platform, an upper positioning ring, a lower positioning ring, and an extension shaft sleeve. The rotary steel structure platforms are arranged parallel to each other at intervals. Each rotary steel structure platform is provided with a mounting hole. An upper positioning ring concentric with the mounting hole is installed on the upper end face of the upper rotary steel structure platform, and a lower positioning ring is installed in the inner ring of the mounting hole of the lower rotary steel structure platform. The extension shaft sleeve is characterized in that: the upper end of the extension shaft sleeve extends out of the mounting hole of the upper rotary steel structure platform and is connected to the upper positioning ring by the cooperation of screws and nuts, and the lower end of the extension shaft sleeve is inserted into the lower positioning ring.

[0007] Furthermore, the extension shaft sleeve includes a sleeve body, a lower snap-fit ​​groove that opens downwards, and an upper snap-fit ​​stepped groove that opens upwards. The upper snap-fit ​​stepped groove and the lower snap-fit ​​groove are respectively formed at the upper and lower ends of the sleeve body. The flange face of the upper snap-fit ​​stepped groove is a flange face, which is placed on the upper positioning ring. The reducer flange, the flange face of the upper snap-fit ​​stepped groove, and the upper positioning ring are connected by bolts and nuts.

[0008] The advantages and positive effects of this utility model are: This fixing structure for the extension shaft sleeve of the rotary reducer of a material handling machine is designed to mount the upper part of the extension shaft sleeve onto the upper rotary steel structure platform, instead of the existing design where the extension shaft sleeve is installed between the upper and lower rotary steel structure platforms. This simplifies both installation and routine inspection and maintenance. Furthermore, the bolted connection and the press-fit of the reducer further ensure the stability of the installation, guaranteeing the stability of the internal drive shaft under impact loads. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the extension shaft sleeve of this utility model.

[0010] Explanation of reference numerals in the attached figures 1-Reducer, 2-Reducer flange, 3-Flange face, 4-Upper positioning ring, 5-Rotating steel structure platform, 6-Extension shaft sleeve, 7-Lower positioning ring, 8-Upper fastening step groove, 9-Sleeve body, 10-Lower fastening groove with downward opening. Detailed Implementation

[0011] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings: This utility model is a redesigned and optimized version of the original extended shaft sleeve structure installed on the rotary reducer structure. The upper end face (flange face) of the newly designed extended shaft sleeve is fixed to the outside and connected to the upper main body of the reducer, thus solving the problem of its installation stability.

[0012] The rotary reducer structure includes a reducer body, an extension shaft, an extension shaft sleeve, a drive pinion, etc. The installation method of the extension shaft sleeve has been changed from inside the material handling machine box structure to the outside, and the flange face at its upper end has been enlarged to match the flange on the reducer body.

[0013] The specific technical solution is as follows: A fixing structure for the extension shaft sleeve of a rotary reducer of a material handling machine includes a rotary steel structure platform 5, an upper positioning ring 4, a lower positioning ring 7, and an extension shaft sleeve 6. The rotary steel structure platforms are arranged parallel to each other at intervals. Each rotary steel structure platform is provided with a mounting hole. An upper positioning ring concentric with the mounting hole is installed on the upper end face of the upper rotary steel structure platform, and a lower positioning ring is installed in the inner ring of the mounting hole of the lower rotary steel structure platform. The innovation is that the upper end of the extension shaft sleeve extends out of the mounting hole of the upper rotary steel structure platform and is connected to the upper positioning ring by the cooperation of screws and nuts. The lower end of the extension shaft sleeve is inserted into the lower positioning ring.

[0014] The extension shaft sleeve is an integrally formed structure, comprising a sleeve body 9, a downward-opening lower fastening groove 10, and an upward-opening upper fastening step groove 8. The sleeve body, the downward-opening lower fastening groove, and the upward-opening upper fastening step groove are axially interconnected. The drive shaft of the reducer 1 is mounted inside the extension shaft sleeve. An upper fastening step groove and a lower fastening groove are respectively formed at the upper and lower ends of the sleeve body. The flange face of the upper fastening step groove is a flange face 3, which is placed on the upper positioning ring. The reducer flange 2, the flange face of the upper fastening step groove, and the upper positioning ring are connected by bolts and nuts.

[0015] The upper positioning ring of the described rotary reducer structure is made of 69mm thick Q235A steel and has 24 M30 long bolt holes, which are welded and fixed to the upper rotary platform base. The central position is the mounting position for the vertical rotary reducer, with bolt holes arranged around the circumference to connect the rotary reducer to the upper positioning ring. The extension shaft sleeve flange has 24 M30 bolt holes, with a flange diameter of 830mm and an increased thickness of 95mm, connecting to the upper positioning ring and the main reducer structure.

[0016] After installation, this utility model, through on-site debugging and a period of operation and break-in, has maintained good operating conditions. The flange face of the extension shaft sleeve of the rotary reducer is also in a condition that facilitates daily inspection and subsequent replacement and maintenance, thus extending the service life of the rotary gears. Currently, the modified rotary reducer is running smoothly, and daily inspections have shown that the reducer is still in good operating condition, with no abnormal noise or vibration.

[0017] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A fixing structure for the extension shaft sleeve of a rotary reducer of a material handling machine, comprising a rotary steel structure platform, an upper positioning ring, a lower positioning ring, and an extension shaft sleeve, wherein the rotary steel structure platforms are arranged parallel to each other at intervals, and each rotary steel structure platform is provided with a mounting hole; an upper positioning ring concentric with the mounting hole is installed on the upper end face of the upper rotary steel structure platform, and a lower positioning ring is installed in the inner ring of the mounting hole of the lower rotary steel structure platform, characterized in that: The upper end of the extension shaft sleeve extends out of the mounting hole of the upper rotating steel structure platform and is connected to the upper positioning ring by screws and nuts. The lower end of the extension shaft sleeve is inserted into the lower positioning ring.

2. The fixing structure for the extension shaft sleeve of the rotary reducer of a material handling machine according to claim 1, characterized in that: The extension shaft sleeve includes a sleeve body, a lower snap-fit ​​groove with a downward opening, and an upper snap-fit ​​stepped groove with an upward opening. The upper snap-fit ​​stepped groove and the lower snap-fit ​​groove are respectively formed at the upper and lower ends of the sleeve body. The flange face of the upper snap-fit ​​stepped groove is a flange face, which is placed on the upper positioning ring. The reducer flange, the flange face of the upper snap-fit ​​stepped groove, and the upper positioning ring are connected by bolts and nuts.

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