CN214305161U

CN214305161U - Improved structure of reducer output shaft for calcium carbonate vertical mill

Info

Publication number: CN214305161U
Application number: CN202023002772.9U
Authority: CN
Inventors: 高鉴英; 王昆; 吴宏登; 邱志康; 罗方; 曹海军; 王秀芹
Original assignee: Jiangsu Jinxiang Transmission Equipment Co ltd
Current assignee: Jiangsu Jinxiang Transmission Equipment Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-09-28
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses an improved structure of a speed reducer output shaft for a calcium carbonate vertical mill, wherein an output shaft (7) is vertically arranged in a box body (1) through a first self-aligning bearing (8) and a second self-aligning bearing (10), and an output gear (9) is arranged in the middle of the output shaft (7); the upper end of the output shaft (7) is provided with threads, the upper end of the output shaft (7) is matched with an inner hole of the rotary table (4) and is fixed through a pin (5) and a round nut (6), and the rotary table (4) is supported on the case cover (2) through a first thrust bearing (3); the lower end of the output shaft (7) is provided with a bearing step, the inner ring of the second thrust bearing (11) is fixed at the lower end of the output shaft (7), and the outer ring of the second thrust bearing (11) is fixedly arranged on the end cover (12). The utility model discloses an output shaft adopts levogyration round nut interference to connect the carousel, guarantees the axial positioning of output shaft, prevents that the output shaft from moving down, increases output shaft lower extreme thrust bearing, effectively resists impact force and torsion that come from the mill vibration production, guarantees to move more reliably.

Description

Improved structure of reducer output shaft for calcium carbonate vertical mill

Technical Field

The utility model relates to the field of machinary, concretely relates to vertical mill of calcium carbonate is with improvement structure of speed reducer output shaft.

Background

With the development of economy, the demand of the current domestic and foreign markets for calcium carbonate products is continuously increased, the vertical grinding machine is the main equipment for producing and processing calcium carbonate, and the quality of the vertical grinding machine directly influences the service performance and the economic performance of the grinding machine.

The speed reducer for the vertical mill is a key component of a mill production line, the turntable is a power output part of the speed reducer for the vertical mill, the turntable is connected with the grinding disc to drive the grinding disc to rotate, and under the centrifugal force of the rotation of the grinding disc, raw materials are pushed to the grinding rollers to be ground. The turntable is connected with an output shaft in a speed reducer for the vertical mill to realize the synchronous rotation of the turntable and the output shaft, and the torque force and the axial thrust generated by the huge impact and vibration of raw materials and the grinding roller need to be borne. In the existing speed reducer for multiple vertical mills, a pin and a bolt are adopted to fix a turntable and an output shaft together through a pressing plate, and in the using process, the bolt is broken and the output shaft moves downwards sometimes, so that the serious consequences that the speed reducer cannot normally operate and a production line stops production are caused.

Therefore, it is desirable to provide an improved structure of an output shaft of a reducer for a calcium carbonate vertical mill to solve the above technical problems.

Disclosure of Invention

The utility model aims to provide a: the improved structure of the output shaft of the speed reducer for the calcium carbonate vertical mill has the advantages that required parts are reasonably selected, the performance is reliable, large impact load can be borne, downward movement of the output shaft due to stress can be prevented, the structure is more reasonable, and the use requirement is met.

The technical solution of the utility model is that: the improved structure of the output shaft of the speed reducer for the calcium carbonate vertical mill comprises a box body, a box cover, an output shaft and an output gear, wherein the output shaft is vertically arranged in the box body through a first self-aligning bearing and a second self-aligning bearing at two ends, and the output gear is arranged in the middle of the output shaft; the method is characterized in that: the upper end of the output shaft is integrally provided with threads, the upper end of the output shaft is matched and connected with an inner hole of the rotary table, the joint surface is axially fixed with the rotary table through a pin and a round nut, and the rotary table is supported on the case cover through a first thrust bearing; the lower end of the output shaft is integrally provided with a bearing step, the inner ring of the second thrust bearing is fixed at the lower end of the output shaft, and the outer ring of the second thrust bearing is fixedly arranged on the end cover.

Wherein, carousel and output shaft adopt interference fit.

Wherein, the whole screw thread of output shaft upper end design is the levogyration, and carousel and output shaft adopt levogyration round nut axial fixity.

Wherein the axial force of the output gear is upward.

Wherein, No. two thrust bearing and end cover adopt the clearance 0.3mm cooperation.

Compared with the prior art, the utility model, the advantage lies in:

1. the output shaft and the rotary table are connected through the interference fit pin, and the torque of the speed reducer is transmitted to the rotary table through interference friction and the pin.

2. The upper end of the output shaft is provided with an integral thread, and the output shaft and the turntable are axially fixed through the round nut, so that the axial positioning of the output shaft is ensured, and the output shaft is prevented from moving downwards.

3. The lower end of the output shaft is provided with an integral bearing step, a thrust bearing is assembled, the gravity of the output shaft and the gear and the extra impact force generated by the grinding disc are borne, and the reliable operation of the speed reducer is guaranteed.

4. From the top down, the carousel clockwise rotation, output shaft upper end screw thread and round nut are the levogyration, and the nut does not loosen when guaranteeing the output shaft operation.

5. The thrust bearing outer ring is installed on the end cover, and a clearance fit of 0.3mm is formed between the thrust bearing outer ring and the end cover.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: the self-aligning type double-shaft gearbox comprises a box body 1, a box cover 2, a first thrust bearing 3, a rotating disc 4, a pin 5, a round nut 6, an output shaft 7, a first self-aligning bearing 8, an output gear 9, a second self-aligning bearing 10, a second thrust bearing 11 and an end cover 12.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, which disclose, without limitation, specific configurations of embodiments of the present invention.

As shown in fig. 1, the improved structure of the output shaft of the speed reducer for the calcium carbonate vertical mill comprises a box body 1, a box cover 2, an output shaft 7 and an output gear 9, wherein the output shaft 7 is supported and vertically installed in the box body 1 through a first self-aligning bearing 8 and a second self-aligning bearing 10 at two ends, and the output gear 9 is installed in the middle of the output shaft 7; the method is characterized in that: the uppermost end of the output shaft 7 is integrally provided with threads, the upper end of the output shaft 7 is matched and connected with an inner hole of the rotary table 4, a joint surface is fixed with the rotary table 4 through a pin 5 and a round nut 6, and the rotary table 4 is supported on the case cover 2 through a first thrust bearing 3; the lower extreme of output shaft 7 is whole to be equipped with the bearing step, and No. two thrust bearing 11 inner races are fixed at the output shaft 7 lower extreme, and No. two thrust bearing 11 outer races fixed mounting is on end cover 12.

Wherein, carousel 4 and output shaft 7 adopt interference fit.

Wherein, the whole screw thread of output shaft 7 upper end design is the levogyration, and carousel 4 and output shaft 7 adopt the levogyration round nut axial fixity.

Wherein the axial force of the output gear 9 is upward.

Wherein, No. two thrust bearing 11 and end cover 12 adopt the clearance 0.3mm cooperation.

Compared with the prior art, the utility model: the fixation between the output shaft and the rotary table is changed into the fixation between a round nut instead of a bolt and a pressing plate; the lower part of the output shaft is provided with the thrust bearing, so that the bearing capacity is increased, and the running reliability of the speed reducer for the calcium carbonate vertical mill is ensured.

Claims

1. The improved structure of the output shaft of the speed reducer for the calcium carbonate vertical mill comprises a box body (1), a box cover (2), an output shaft (7) and an output gear (9), wherein the output shaft (7) is vertically installed in the box body (1) through a first self-aligning bearing (8) and a second self-aligning bearing (10) at two ends in a supporting mode, and the output gear (9) is installed in the middle of the output shaft (7); the method is characterized in that: the uppermost end of the output shaft (7) is integrally provided with threads, the upper end of the output shaft (7) is in fit connection with an inner hole of the rotary table (4), a joint surface is axially fixed with the rotary table (4) through a pin (5) and a round nut (6), and the rotary table (4) is supported on the case cover (2) through a first thrust bearing (3); the lower end of the output shaft (7) is integrally provided with a bearing step, the inner ring of the second thrust bearing (11) is fixed at the lower end of the output shaft (7), and the outer ring of the second thrust bearing (11) is fixedly arranged on the end cover (12).

2. The improved structure of the output shaft of the speed reducer for the calcium carbonate vertical mill as claimed in claim 1, is characterized in that: the rotary disc (4) is in interference fit with the output shaft (7).

3. The improved structure of the output shaft of the speed reducer for the calcium carbonate vertical mill as claimed in claim 1, is characterized in that: the upper end of the output shaft (7) is designed with integral threads which are left-handed, and the rotary disc (4) and the output shaft (7) are axially fixed by adopting a left-handed round nut.

4. The improved structure of the output shaft of the speed reducer for the calcium carbonate vertical mill as claimed in claim 1, is characterized in that: the axial force of the output gear (9) is upward.

5. The improved structure of the output shaft of the speed reducer for the calcium carbonate vertical mill as claimed in claim 1, is characterized in that: the second thrust bearing (11) and the end cover (12) are matched with each other by a gap of 0.3 mm.