Steel rail milling and grinding mechanism
By designing a rail milling and grinding mechanism including a frame, a slip mechanism and a driven mechanism, the problem that traditional rail grinding mechanism cannot repair fat edge damage is solved, and rapid and effective rail milling and grinding is achieved, and the motor and milling cutters are protected.
Patent Information
- Application Number
- CN202422210513.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-10
AI Technical Summary
Traditional rail grinding mechanisms cannot effectively repair rails with fat edge damage and cannot meet daily track maintenance needs.
A rail milling and grinding mechanism is designed, including a frame, a sliding mechanism and a driven mechanism, which is driven by a motor and a milling cutter pulley drive, combining a plane thrust bearing and an angular contact ball bearing to ensure the axial fixation of the milling cutter during high-speed rotation operation.
This mechanism can quickly mill the rail fat edges, avoiding the motor stop caused by lag during high-speed milling and grinding, protecting the motor from damage, and ensuring the normal operation of the milling cutter.
Smart Images
Figure CN223033767U_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of railway equipment maintenance and repair, and particularly relates to a rail milling and grinding mechanism. Background Art
[0002] With the rapid development of China's railways, the railway mileage has increased sharply. Among them, the safety of rails is closely related to the safety of railway operation. As the operating mileage of railway rails increases, the probability of side flash on the rails also increases sharply. Therefore, in the face of rails with flash, the traditional rail grinding mechanism can no longer meet the daily track maintenance needs, and there is an urgent need for a rail milling and grinding mechanism to repair the rails damaged by track flash. Utility Model Content
[0003] The purpose of the present utility model is to provide a rail milling and grinding mechanism, which can not only quickly mill the track flash, but also be installed on other equipment, is small and portable, greatly improves the work efficiency, and solves the problems raised in the above background art.
[0004] The technical solution adopted by the present invention is as follows: A rail milling and grinding mechanism, characterized by comprising: a frame, a sliding mechanism and a driven mechanism. The frame is slidably connected to the sliding mechanism. A lead screw nut is arranged on the top of the frame, and a top lead screw matched with the lead screw nut is arranged on the sliding mechanism. The top lead screw is in threaded connection with the lead screw nut; the sliding mechanism is fixed to the driven mechanism; the sliding mechanism is provided with a motor pulley driven by a motor, and the driven mechanism is provided with a milling cutter pulley and a milling cutter through a milling cutter transmission shaft that can rotate axially. The milling cutter pulley is connected to the motor pulley by a belt.
[0005] Further, the frame has a fixed frame, slide rails arranged on both inner walls of the fixed frame, and sliders moving along the slide rails. The lead screw nut is fixed to the top of the fixed frame by bolts; the slide rails are bolted to the fixed frame; the sliders are bolted to the sliding mechanism.
[0006] Further, the sliding mechanism includes a sliding frame, a motor mounting bracket, a lead screw, a handwheel, a pedestal bearing, a motor, a motor pulley and a locking nut; the upper end of the lead screw is connected to the handwheel, and the lower end of the lead screw is connected to the pedestal bearing; the pedestal bearing is bolted to the sliding frame; the motor mounting bracket is welded to the sliding frame; the motor is bolted to the motor mounting bracket; the motor pulley is fixed to the output shaft of the motor by a locking nut, and the slider is bolted to the sliding frame.
[0007] Further, the driven mechanism includes a milling cutter mounting bracket, a milling cutter, a milling cutter locking nut, an end cover, a milling cutter pulley, a milling cutter transmission shaft, a flat thrust bearing, an angular contact ball bearing, and a flat key; the end cover is bolted to the milling cutter mounting bracket; the milling cutter and the milling cutter pulley are sleeved on the milling cutter transmission shaft through the flat key and fixed by the milling cutter locking nut; the flat thrust bearing and the angular contact ball bearing are sleeved on the milling cutter transmission shaft, and the end cover is sleeved and installed on the outside.
[0008] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows: by setting a pulley between the motor and the milling cutter, the motor damage caused by the sudden stop of the motor due to the jamming of the milling cutter during the high-speed milling and grinding of the rail flash is avoided; by setting a flat thrust bearing and an angular contact ball bearing in the driven mechanism, the axial fixation of the milling cutter during the high-speed rotation operation is ensured. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0010] Figure 2 It is a schematic diagram of the overall structure of the present utility model in another direction.
[0011] Figure 3 It is a schematic diagram of the frame structure.
[0012] Figure 4 It is a schematic diagram of the sliding mechanism structure.
[0013] Figure 5 It is a schematic diagram of the driven mechanism structure.
[0014] Figure 6 It is a schematic diagram of the driven mechanism in another direction.
[0015] Figure 7 It is Figure 6 the A-A cross-sectional view of
[0016] The reference numerals in the drawings are indicated as follows:
[0017] 1 - frame; 2 - sliding mechanism; 3 - driven mechanism; 4 - belt; 11 - fixed frame; 12 - lead screw nut; 13 - slide rail; 14 - slider; 21 - sliding frame; 22 - motor mounting bracket; 23 - lead screw; 24 - hand wheel; 25 - pedestal bearing; 26 - motor; 27 - motor pulley; 28 - locking nut; 31 - milling cutter mounting bracket; 32 - milling cutter; 33 - milling cutter locking nut; 34 - end cover; 35 - milling cutter pulley; 36 - milling cutter transmission shaft; 37 - flat thrust bearing; 38 - angular contact ball bearing; 39 - flat key. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] To further illustrate each embodiment, the present utility model provides attached drawings, which are a part of the disclosure of the present utility model. They are mainly used to illustrate the embodiments and can cooperate with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.
[0019] As Figures 1-4 shown, the rail milling mechanism provided in this embodiment includes a frame 1, a sliding mechanism 2, a driven mechanism 3, and a belt 4. A slide rail 13 is installed on the frame 1 by bolts, and the slide rail 13 is slidably connected to a slider 14 fixedly installed on the side of the sliding mechanism 2 by bolts. The screw nut 12 at the top of the frame 1 is threadedly connected to the screw rod 23 at the top of the sliding mechanism 2. After turning the handwheel 24, the screw rod 23 rotates accordingly, and the sliding mechanism 2 and the frame 1 move up and down relative to each other through the slide rail 13 and the slider 14 installed on the side. The sliding mechanism 2 is bolted to the driven mechanism 3, and at the same time, the motor pulley 27 and the milling cutter pulley 35 are connected by a belt 4. There are vertical oblong holes in the bolt connection holes between the motor mounting bracket 22 and the milling cutter mounting bracket 31, so that the sliding mechanism 2 and the driven mechanism 3 can be adjusted by the relative mounting position to ensure that the belt 4 has an appropriate elastic force during installation to enable the normal operation of the milling cutter 32.
[0020] In this embodiment, as Figures 5-7 shown, the sliding mechanism 2 includes a sliding frame 21, a motor mounting bracket 22, a screw rod 23, a handwheel 24, a pedestal bearing 25, a motor 26, a motor pulley 27, and a locking nut 28. The upper end of the screw rod 23 is fixed to the handwheel 24, and the lower end is connected to the pedestal bearing 25. The screw rod 23 is axially fixed to the pedestal bearing 25 and can rotate relative to each other circumferentially. The pedestal bearing 25 is bolted to the sliding frame 21. The motor mounting bracket 22 is welded to the sliding frame 21; the motor 26 is bolted to the sliding frame 21 to provide the power for the rotation of the milling cutter 32. The motor pulley 27 is fixed to the output shaft of the motor 26 by a locking nut 28.
[0021] In this embodiment, the driven mechanism 3 includes a milling cutter mounting bracket 31, a milling cutter 32, a milling cutter locking nut 33, an end cover 34, a milling cutter pulley 35, a milling cutter transmission shaft 36, a flat thrust bearing 37, an angular contact ball bearing 38, and a flat key 39. The end cover 34 is bolted to the milling cutter mounting bracket 31. An inner bearing mounting boss is provided inside the end cover 34. The end cover 34 and the milling cutter transmission shaft 36 are in clearance fit with the flat thrust bearing 37 and in interference fit with the angular contact ball bearing 38. The milling cutter 32 and the milling cutter pulley 35 are sleeved on the milling cutter transmission shaft 36 and fixed by the flat key 39 and the milling cutter locking nut 33. One end of the milling cutter transmission shaft 36 where it is installed with the end cover 34 is provided with a square shaft, and the other end is provided with a thread for mating connection with the milling cutter locking nut 33. The setting of the square shaft helps to provide a wrench clamping position when replacing the milling cutter 32. The flat thrust bearing 37 and the angular contact ball bearing 38 are sleeved and installed on the milling cutter transmission shaft 36.
[0022] The working principle of the present utility model is as follows: When the rail milling and grinding mechanism works, turning the handwheel 24 drives the lead screw 23 to rotate in the lead screw nut 12. At the same time, the slide rail 13 installed on the fixed frame 11 and the slider 14 on the sliding frame 21 slide relative to each other, realizing the up and down movement of the sliding mechanism 2; the bolt connection holes between the motor mounting bracket 22 and the milling cutter mounting bracket 31 are set as slotted holes, so that the relative mounting position between the sliding mechanism 2 and the driven mechanism 3 can be adjusted, ensuring the pre-tightening force required for the normal operation of the belt 4 and the milling cutter 32. At the same time, through belt drive, it effectively prevents the problems of motor and personnel damage caused by jamming when the milling cutter mills the fat edge of the rail. Through the stepped shaft structure provided by the milling cutter transmission shaft 36 and the combined action with the flat thrust bearing 37 and the angular contact ball bearing 38, the axial and circumferential fixation of the milling cutter 32 is realized, and the axial pre-tightening force required for the normal rotary milling operation of the milling cutter 32 is provided.
[0023] In summary, by means of the above technical solutions of the present utility model, a split-type simulation training operation console for a subway driver's cab is provided, and a reduction of nearly 1:1 of the actual driving operation console of this type of subway driver's cab is completed, ensuring the authenticity, safety and effectiveness of subway driver training; at the same time, compared with the overall forming process of fiberglass, the overall forming process of sheet metal welding can not only improve the overall strength of the console body, but also greatly save the production and manufacturing costs.
[0024] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation", "rotation connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0025] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A rail milling mechanism, characterized in that include: A frame (1), a sliding mechanism (2) and a driven mechanism (3), wherein the frame (1) is slidably connected to the sliding mechanism (2), a screw nut (12) is arranged on the top of the frame (1), the sliding mechanism (2) is provided with a top screw (23) matched with the screw nut (12), and the top screw (23) is threadedly connected to the screw nut (12); the sliding mechanism (2) and the driven mechanism (3) are fixed; the sliding mechanism (2) is provided with a motor pulley (27) driven by a motor (26), and the driven mechanism (3) is provided with a milling cutter pulley (35) and a milling cutter (32) via an axially rotatable milling cutter transmission shaft (36), and the milling cutter pulley (35) is connected to the motor pulley (27) via a belt (4).
2. A rail milling mechanism according to claim 1, characterized in that: The frame (1) comprises a fixed frame (11), slide rails (13) arranged on inner walls on both sides of the fixed frame (11), and sliders (14) moving along the slide rails (13); the screw nut (12) is fixed to the top of the fixed frame (11) by bolts; the slide rails (13) are bolted to the fixed frame (11); and the slider (14) is bolted to the sliding mechanism (2).
3. A rail milling mechanism according to claim 2, characterized in that: The sliding mechanism (2) comprises a sliding frame (21), a motor mounting frame (22), a screw (23), a hand wheel (24), a seat bearing (25), a motor (26), a motor pulley (27) and a locking nut (28); the upper end of the screw (23) is connected to the hand wheel (24), and the lower end of the screw (23) is connected to the seat bearing (25); the seat bearing (25) is bolted to the sliding frame (21); the motor mounting frame (22) is welded to the sliding frame (21); the motor (26) is bolted to the motor mounting frame (22); the motor pulley (27) is fixed to the output shaft of the motor (26) via the locking nut (28), and the slider (14) is bolted to the sliding frame (21).
4. A rail milling mechanism according to claim 3, characterized in that: The driven mechanism (3) comprises a milling cutter mounting frame (31), a milling cutter (32), a milling cutter locking nut (33), an end cover (34), a milling cutter pulley (35), a milling cutter transmission shaft (36), a plane thrust bearing (37), an angular contact ball bearing (38) and a flat key (39); the end cover (34) is bolted to the milling cutter mounting frame (31); the milling cutter (32) and the milling cutter pulley (35) are sleeved on the milling cutter transmission shaft (36) via the flat key (39) and fixed via the milling cutter locking nut (33); the plane thrust bearing (37) and the angular contact ball bearing (38) are sleeved on the milling cutter transmission shaft (36), and the end cover (34) is sleeved on the outer side.
5. A rail milling mechanism according to claim 4, characterized in that: One end of the milling cutter transmission shaft (36) and the end cover (34) is mounted with a square shaft.
6. A rail milling mechanism according to claim 5, characterized in that: The motor mounting frame (22) is provided with a vertically arranged oblong hole, and the milling cutter mounting frame (31) of the driven mechanism (3) is fixed by passing bolts through the oblong hole.