Locking device for in-furnace roller of heating furnace and hollow shaft of speed reducer

Abstract

The utility model relates to a locking device for a heating furnace inner roller and a speed reducer hollow shaft, and belongs to the technical field of wire and bar production equipment in the metallurgical industry. According to the technical scheme, the device comprises a hexagon socket screw (1), an inner locking sleeve (3), an outer locking sleeve (4), a fixing sleeve (5), a speed reducer hollow shaft (6) and an in-furnace roller shaft (7), the fixing sleeve (5) is fixed to the end of the speed reducer hollow shaft (6), the in-furnace roller shaft (7) is installed in the speed reducer hollow shaft (6), the inner locking sleeve (3) is arranged on the in-furnace roller shaft (7) in a sleeving mode, the outer locking sleeve (4) is arranged on the inner locking sleeve (3) in a sleeving mode, and the inner locking sleeve (3) is sleeved with the fixing sleeve (5). The outer locking sleeve (4) and the fixing sleeve (5) are connected together through a hexagon socket screw (1); the outer surface of the inner locking sleeve (3) has taper, and the inner diameter of the inner locking sleeve (3) is matched with the diameter of a furnace inner roller shaft (7). The roller shaft in the heating furnace and the hollow shaft of the speed reducer are convenient to install, enough torque can be transmitted, and the roller shaft in the heating furnace and the hollow shaft of the speed reducer are convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to a locking device for the inner roller of a heating furnace and the hollow shaft of a speed reducer, belonging to the technical field of bar and wire production equipment in the metallurgical industry. Background Art

[0002] In the production of high-speed wire rods, the heating furnace is a key control device in the production line, which includes mechanical equipment such as the charging and discharging roller table (also known as the inner roller of the furnace). The inner roller of the furnace consists of a speed reducer and a roller assembly. The speed reducer outputs with a hollow shaft. The driving side shaft of the roller assembly is inserted into the hollow shaft of the speed reducer, and the hollow shaft is compressed by bolts to cause the hollow shaft to deform and hold the roller shaft tightly to achieve torque transmission. The cooperation requirement between the hollow shaft and the roller shaft is H7 / h6. Otherwise, due to the small deformation amount generated by the hollow shaft, sufficient pre-tightening force cannot be generated between the hollow shaft and the roller shaft, and sufficient torque cannot be transmitted to achieve the transmission from the speed reducer to the roller. However, in actual assembly, the length of the hollow shaft is 350 mm, and this kind of H7 / h6 fitting and assembly is extremely difficult. Tools such as jacks need to be used, which are likely to cause assembly accidents such as shaft bending and speed reducer damage. In fact, during the assembly by workers, the outer diameter of the shaft is often ground to facilitate installation into the hollow shaft. This results in insufficient pre-tightening force between the hollow shaft and the roller shaft after compression, insufficient torque transmission during equipment operation, causing the speed reducer to rotate while the roller table does not rotate, resulting in equipment shutdown and longer heating time of the billets in the furnace, which not only affects the output but also the quality of some varieties. The emergency measure taken on-site is to weld the roller shaft and the hole, which brings another problem that when replacing the roller, the speed reducer and the roller shaft cannot be separated normally, and the speed reducer cannot be used anymore, causing waste of manpower and material resources. Content of the Utility Model

[0003] The purpose of the utility model is to provide a locking device for the inner roller of a heating furnace and the hollow shaft of a speed reducer, which is convenient for installing the roller shaft of the inner roller of the heating furnace and the hollow shaft of the speed reducer, can transmit sufficient torque, and is convenient for disassembly and assembly, so as to solve the problems existing in the background art.

[0004] The technical solution of the utility model is as follows:

[0005] A locking device for the inner roller of a heating furnace and the hollow shaft of a speed reducer includes an inner hexagon bolt, an inner locking sleeve, an outer locking sleeve, a fixed sleeve, the hollow shaft of the speed reducer, and the roller shaft of the inner roller of the furnace. The fixed sleeve is fixed at the end of the hollow shaft of the speed reducer. The roller shaft of the inner roller of the furnace is installed in the hollow shaft of the speed reducer. The inner locking sleeve is sleeved on the roller shaft of the inner roller of the furnace. The outer locking sleeve is sleeved on the inner locking sleeve. The outer locking sleeve and the fixed sleeve are connected together by an inner hexagon bolt.

[0006] The outer surface of the inner locking sleeve has a taper, and its inner diameter matches the diameter of the roller shaft of the inner roller of the furnace.

[0007] The inner surface of the outer locking sleeve has a taper, which is the same as the taper of the outer surface of the inner locking sleeve.

[0008] Both the inner locking sleeve and the outer locking sleeve are open sleeves.

[0009] The central hole of the fixed sleeve is a stepped hole that fits with the hollow shaft of the reducer and the outer locking sleeve, and a bolt hole that fits with the hexagon socket head cap screw is provided in the stepped hole.

[0010] A spring washer is provided on the hexagon socket head cap screw.

[0011] The beneficial effects of the present utility model are as follows: The roller shaft of the in-furnace roller of the heating furnace is conveniently installed with the hollow shaft of the reducer, can transmit sufficient torque, and is convenient for disassembly and assembly. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the present utility model;

[0013] Figure 2 It is the front view of the inner locking sleeve of the present utility model;

[0014] Figure 3 It is the side view of the inner locking sleeve of the present utility model;

[0015] Figure 4 It is the front view of the outer locking sleeve of the present utility model;

[0016] Figure 5 It is the side view of the outer locking sleeve of the present utility model;

[0017] Figure 6 It is the front view of the fixed sleeve of the present utility model;

[0018] Figure 7 It is the schematic diagram of the in-furnace roller shaft of the present utility model;

[0019] Figure 8 It is the schematic diagram of the hollow shaft of the reducer of the present utility model;

[0020] In the figure: hexagon socket head cap screw 1, spring washer 2, inner locking sleeve 3, outer locking sleeve 4, fixed sleeve 5, hollow shaft of reducer 6, in-furnace roller shaft 7, bolt hole 8. Detailed Description of the Preferred Embodiment

[0021] The present utility model will be further described below with reference to the drawings and by way of examples.

[0022] Refer to the attached Figure 1-8, A locking device for the in-furnace roller and the hollow shaft of the speed reducer of a heating furnace, which includes an internal hexagon bolt 1, an internal locking sleeve 3, an external locking sleeve 4, a fixing sleeve 5, the hollow shaft 6 of the speed reducer, and the roller shaft 7 of the in-furnace roller. The fixing sleeve 5 is fixed at the end of the hollow shaft 6 of the speed reducer. The roller shaft 7 of the in-furnace roller is installed inside the hollow shaft 6 of the speed reducer. The internal locking sleeve 3 is sleeved on the roller shaft 7 of the in-furnace roller. The external locking sleeve 4 is sleeved on the internal locking sleeve 3. The external locking sleeve 4 and the fixing sleeve 5 are connected together by the internal hexagon bolt 1.

[0023] In this embodiment, as Figure 2 , 3 shown, the outer surface of the internal locking sleeve 3 has a taper and is an open structure, and its inner diameter matches the diameter of the roller shaft 7 of the in-furnace roller;

[0024] As Figure 4 , 5 shown, the inner surface of the external locking sleeve 4 has a taper, and its taper is the same as that of the outer surface of the internal locking sleeve 3 and is an open structure. In this way, when the internal locking sleeve 3 and the external locking sleeve 4 are used in combination, the inner diameter of the internal locking sleeve 3 can be shrunk and the outer diameter of the external locking sleeve 4 can be expanded, so as to transmit the torque from the speed reducer to the roller;

[0025] As Figure 6 shown, the central hole of the fixing sleeve 5 is a stepped hole that matches the hollow shaft 6 of the speed reducer and the external locking sleeve 4, and a bolt hole 8 that matches the internal hexagon bolt 1 is provided in the stepped hole;

[0026] As Figure 7 , 8 shown, for the part of the roller shaft 7 of the in-furnace roller that is matched with the hollow shaft 6 of the speed reducer, 30 mm is left at the root, and the fit with the hollow shaft 6 of the speed reducer is an interference fit to play a positioning role, and the rest is a small clearance fit to facilitate the installation of the roller into the hollow shaft of the speed reducer.

[0027] As shown in the appendix Figure 1 shown, during assembly, first, the fixing sleeve 5 is hot-fitted onto the hollow shaft 6 of the speed reducer and welded appropriately; then, the roller shaft 7 of the in-furnace roller is installed inside the hollow shaft 6 of the speed reducer; secondly, as shown in the figure, the internal locking sleeve 3 and the external locking sleeve 4 are successively installed on the roller shaft 7 of the in-furnace roller. The internal hexagon screw 1 is sleeved with a spring washer 2 and then passes through the through hole of the external locking sleeve 4 and is screwed into the bolt hole 8 of the fixing sleeve 5. The internal hexagon bolt 1 is tightened. Through the taper action of the internal locking sleeve 3 and the external locking sleeve 4, the inner diameter of the internal locking sleeve 3 is shrunk and the outer diameter of the external locking sleeve 4 is expanded, so as to hold the fixing sleeve 5 and the roller shaft 7 of the in-furnace roller tightly and transmit the torque by friction.

Claims

1. A locking device for the in-furnace roller and the hollow shaft of the speed reducer of a heating furnace, characterized in that: It includes an internal hexagon bolt (1), an internal locking sleeve (3), an external locking sleeve (4), a fixing sleeve (5), a hollow shaft of a speed reducer (6) and a roller shaft of an in-furnace roller (7). The fixing sleeve (5) is fixed at the end of the hollow shaft of the speed reducer (6). The roller shaft of the in-furnace roller (7) is installed inside the hollow shaft of the speed reducer (6). The internal locking sleeve (3) is sleeved on the roller shaft of the in-furnace roller (7). The external locking sleeve (4) is sleeved on the internal locking sleeve (3). The external locking sleeve (4) and the fixing sleeve (5) are connected together by the internal hexagon bolt (1).

2. The locking device for the in-furnace roller and the hollow shaft of the speed reducer of a heating furnace according to claim 1, characterized in that: The outer surface of the internal locking sleeve (3) has a taper, and its inner diameter matches the diameter of the roller shaft of the in-furnace roller (7).

3. A locking device for the inner roller of a heating furnace and the hollow shaft of a speed reducer according to claim 2, characterized in that: The inner surface of the external locking sleeve (4) has a taper, and its taper is the same as that of the outer surface of the internal locking sleeve (3).

4. A locking device for the in-furnace roller and the hollow shaft of the speed reducer of a heating furnace according to claim 3, characterized in that: Both the internal locking sleeve (3) and the external locking sleeve (4) are split sleeves.

5. A locking device for the in-furnace roller and the hollow shaft of the speed reducer of a heating furnace according to claim 1, characterized in that: The central hole of the fixing sleeve (5) is a stepped hole that mates with the hollow shaft of the speed reducer (6) and the external locking sleeve (4). A bolt hole (8) that mates with the internal hexagon bolt (1) is provided in the stepped hole.

6. A locking device for the in-furnace roller and the hollow shaft of the speed reducer of a heating furnace according to claim 1, characterized in that: A spring washer (2) is provided on the internal hexagon bolt (1).

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