Speed reducer for metallurgical roller replacement

Abstract

The utility model discloses a metallurgical roller changing speed reducer which comprises a speed reducer box body, a worm and gear cavity and a planet carrier cavity are arranged in the speed reducer box body, a worm is connected with the worm and gear cavity in a penetrating mode, a worm gear is meshed below the worm, a worm gear shaft of the worm gear is coaxially connected with the shaft end of a sun gear, and a gear ring is arranged in the planet carrier cavity. A gear ring is arranged in the sun gear, a plurality of planet gears are meshed in the gear ring, all meshed with the tooth portion of the sun gear and rotatably and evenly distributed on a planet carrier through planet shafts, the planet carrier and the sun gear are coaxially arranged, and the output end of the planet carrier is externally connected with an output shaft connected with a chain wheel meshed with a rack matched with the roller changing vehicle to move. The device is simple in structure, the speed reducer first-stage planetary transmission mechanism is arranged, large-transmission-ratio output is achieved through a compact space, chain wheel rotation is more stable, the chain wheel is matched with the rack, the metallurgy roll changing vehicle is driven to move, the speed requirement for movement of the metallurgy roll changing vehicle is met, and safety and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reducers, in particular to a speed reducer for metallurgical roller replacement. Background Art

[0002] The finishing mill in a steel mill is a machine used to process steel, and the rolls are a key component. After a period of use, the rolls may wear out or develop cracks, affecting processing quality and efficiency. This necessitates the use of a roll-changing vehicle to replace the rolls. To ensure the vehicle arrives safely and smoothly at the designated location, it is often necessary to ensure stability and a suitable speed for the roll-changing process. Summary of the Invention

[0003] In view of the existing problems, the utility model provides a reducer for metallurgical roller changing, which has a compact structure, stable transmission and can achieve a large transmission ratio output.

[0004] To achieve the above-mentioned purpose, the utility model provides the following solutions: a reducer for metallurgical roller changing, comprising a reducer housing, characterized in that a worm gear chamber and a planetary carrier chamber are provided in the reducer housing, a worm is passed through the worm gear chamber, a worm is meshed with a worm wheel below the worm, the worm wheel shaft of the worm wheel is coaxially connected to the shaft end of the sun wheel, a gear ring is provided in the planetary carrier chamber, a plurality of planetary wheels are meshed in the gear ring, and the plurality of planetary wheels are all meshed with the teeth of the sun wheel, and the plurality of planetary wheels are rotatable via the planetary shaft and are evenly distributed on a planetary carrier coaxially arranged with the sun wheel, and the output end of the planetary carrier is externally connected to an output shaft connected to a sprocket meshed with a rack that cooperates with the movement of the roller changing vehicle.

[0005] Furthermore, both ends of the worm shaft of the worm wheel are supported on the inner wall of the worm gear chamber via bearings.

[0006] Furthermore, an internal spline is provided on the axis of the worm gear shaft, and an external spline meshing with the internal spline is provided on the sun gear shaft.

[0007] Furthermore, an annular limiting protrusion is provided on the inner wall of the worm gear shaft.

[0008] Furthermore, one end of the sun gear away from the tooth portion is provided with a limiting groove adapted to the annular limiting protrusion.

[0009] Furthermore, the planet carrier chamber includes a gear ring cover, and the gear ring is between the gear ring cover and the outer wall of the worm gear chamber and is fixedly connected to form the planet carrier chamber by bolts.

[0010] Furthermore, the planet carrier is coaxially arranged with the ring gear cover, a mounting hole is provided at the center of the ring gear cover, and the output end of the planet carrier is mounted in the mounting hole through a bearing.

[0011] Furthermore, the output end of the planetary carrier is provided with a shaft hole, and the output shaft and the output end of the planetary carrier are fixedly connected by inserting through the shaft hole.

[0012] Furthermore, the planetary carrier is provided with a cover body with a through hole in the center, the planetary shaft is fixed between the cover body and the planetary carrier, and the planetary gear is mounted on the planetary shaft through a bearing.

[0013] Furthermore, a mounting groove is provided on the outer wall of the worm gear chamber, and a hollow connecting column is provided on the outer side of the cover body, and the hollow connecting column is arranged in the mounting groove through a bearing.

[0014] The beneficial effects of the utility model are: by setting up a planetary transmission mechanism of a reducer, a larger transmission ratio output is achieved in a compact space, the rotation of the sprocket is made more stable, and the sprocket and the rack are used to drive the metallurgical roll changing car to move, thereby meeting the speed requirements of the metallurgical roll changing car and being safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 A partial schematic diagram of the worm.

[0017] Figure numerals: reducer housing 1; worm gear chamber 2; planetary carrier chamber 3; worm 4; worm wheel 5; sun gear 6; ring gear 7; planetary gear 8; planetary shaft 9; planetary carrier 10; output shaft 11; annular limiting protrusion 12; limiting groove 13; ring gear cover 14; cover body 15; mounting groove 16; hollow connecting column 17; roller changing vehicle body 18; sprocket 19; rack 20. DETAILED DESCRIPTION

[0018] The present invention will be further described with reference to the accompanying drawings.

[0019] refer to Figure 1 , Figure 2A reducer for metallurgical roll changing includes a reducer housing 1, a roll changing vehicle body 18 is fixed to the reducer housing 1 by bolts, a worm gear chamber 2 and a planetary carrier chamber 3 are respectively provided in the reducer housing 1, a worm 4 is passed through the upper part of the worm gear chamber 2 through a bearing, the input end of the worm 4 is connected to the drive motor, and a worm wheel 5 is meshed with the lower end of the worm 2. The worm wheel shaft of the worm wheel 5 is supported on the inner wall of the worm gear chamber 2 through a bearing, the worm wheel shaft of the worm wheel 5 is coaxially connected to the shaft end of the sun gear 6, an internal spline is provided on the axis center of the worm wheel shaft, and an external spline meshing with the internal spline is provided on the shaft end of the sun gear 6 The outer spline of the sun gear 6 is inserted into the axis position of the worm gear 5 and matched with its inner spline. The worm gear 5 and the sun gear 6 are driven by the spline. The spline is used to make the transmission more stable. An annular limiting protrusion 12 is provided on the inner wall of the axis of the worm gear 5. A limiting groove 13 that cooperates with the annular limiting protrusion 12 is provided on the end of the sun gear 6 away from the sun gear tooth portion to limit the sun gear 6. The tooth portion of the sun gear 6 is located in the planetary carrier chamber 3. The planetary carrier chamber 3 includes a gear ring cover 14. The gear ring 7 is between the gear ring cover 14 and the outer wall of the worm gear chamber 1 and is fixed by bolts to form a planetary carrier chamber. Chamber 3, a plurality of planetary gears 8 are meshed in the ring gear 7, and the plurality of planetary gears 8 are meshed with the teeth of the sun gear 6. The plurality of planetary gears 8 are evenly distributed on the planetary carrier 10 coaxially arranged with the sun gear 6 through the planetary shaft 9 and the bearings. The planetary carrier 10 is coaxially arranged with the ring gear cover 14. The center of the ring gear cover 14 is provided with a mounting hole. The output end of the planetary carrier 10 is mounted in the mounting hole through a bearing. The output end of the planetary carrier 10 is provided with an axial hole. The output shaft 11 is fixedly connected to the output end of the planetary carrier 10 by inserting bolts into the axial hole. The planetary carrier 10 is provided with a cover body 15 with a through hole in the center. The planetary shaft 9 is fixed on Between the cover body 15 and the planetary carrier 10, the planetary gear 8 is mounted on the planetary shaft 9 through a bearing. A hollow connecting column 17 is provided on the outside of the cover body 15. A mounting groove 16 is provided on the outer wall of the worm gear chamber 2. The hollow connecting column 17 is arranged in the mounting groove 16 through a bearing, so that the rotation of the planetary carrier 10 is more stable. The sun gear 6, the ring gear 7, the planetary gear 8 and the planetary carrier constitute a planetary transmission mechanism for transmission. A sprocket 19 is fixedly connected to the output shaft 11. The sprocket 19 engages with the rack 20 that moves with the roll changing vehicle body 18. The sprocket 19 rotates, driving the roll changing vehicle to move along the direction of the rack 20.

[0020] In this embodiment, the worm 4 is connected to an external drive motor to rotate, the worm 4 is engaged with the worm wheel 5 to drive the worm wheel 5 to rotate, the worm wheel 5 drives the sun gear 6 to rotate, the rotation of the sun gear 6 drives the planetary gear 8 to rotate and revolve around the sun gear 6 along the ring gear 7, driving the planetary carrier 10 to rotate, forming a first-level planetary transmission mechanism, achieving a larger transmission ratio output, making the sprocket 19 rotate more stably, thereby driving the sprocket 19 to rotate and cooperate with the rack 20, driving the roller changing vehicle body 18 to move safely and reliably.

[0021] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A speed reducer for metallurgical roller replacement, comprising a speed reducer housing, characterized in that: The reducer case is provided with a worm gear chamber and a planetary carrier chamber, the worm gear chamber is connected with a worm, a worm wheel is meshed below the worm, the worm wheel shaft of the worm wheel is coaxially connected to the shaft end of the sun gear, a gear ring is provided in the planetary carrier chamber, a plurality of planetary gears are meshed in the gear ring, and the plurality of planetary gears are all meshed with the teeth of the sun gear. The plurality of planetary gears are rotatable through the planetary shaft and are evenly distributed on the planetary carrier coaxially arranged with the sun gear, and the output end of the planetary carrier is externally connected with an output shaft connected to a sprocket meshed with a rack that cooperates with the movement of the roller changing car.

2. A speed reducer for metallurgical roller replacement according to claim 1, characterized in that: Both ends of the worm shaft of the worm wheel are supported on the inner wall of the worm gear chamber through bearings.

3. The reducer for metallurgical roller replacement according to claim 2, characterized in that: An internal spline is provided on the axis center of the worm gear shaft, and an external spline meshing with the internal spline is provided on the sun gear shaft.

4. A speed reducer for metallurgical roller replacement according to claim 3, characterized in that: An annular limiting protrusion is provided on the inner wall of the worm gear shaft.

5. The reducer for metallurgical roller replacement according to claim 4, characterized in that: An end of the sun gear away from the tooth portion is provided with a limiting groove adapted to the annular limiting protrusion.

6. The reducer for metallurgical roller replacement according to claim 1, characterized in that: The planet carrier chamber comprises a gear ring cover, wherein the gear ring is located between the gear ring cover and the outer wall of the worm gear chamber and is fixedly connected to form the planet carrier chamber by bolts.

7. The reducer for metallurgical roller replacement according to claim 6, characterized in that: The planet carrier is coaxially arranged with the gear ring cover. A mounting hole is arranged at the center of the gear ring cover. The output end of the planet carrier is mounted in the mounting hole through a bearing.

8. The reducer for metallurgical roller replacement according to claim 1, characterized in that: The output end of the planetary carrier is provided with a shaft hole, and the output shaft is fixedly connected to the output end of the planetary carrier through the shaft hole.

9. The reducer for metallurgical roller replacement according to claim 1, characterized in that: The planetary carrier is provided with a cover body with a through hole in the center, the planetary shaft is fixed between the cover body and the planetary carrier, and the planetary gear is mounted on the planetary shaft through a bearing.

10. The reducer for metallurgical roller replacement according to claim 9, characterized in that: An installation groove is provided on the outer wall of the worm gear chamber, and a hollow connecting column is provided on the outer side of the cover body. The hollow connecting column is arranged in the installation groove through a bearing.

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