Bearing fixing device for vulcanizing drum of drum vulcanizing machine

Abstract

The present invention relates to a bearing fixing device, specifically a bearing fixing device for a vulcanizing drum of a drum vulcanizer, comprising a vulcanizing drum shaft head, a bearing seat and a tapered sleeve; the bearing support part on the vulcanizing drum shaft head comprises a first bearing support part at the outer end and a second bearing support part at the inner end; the bearing seat sleeve is arranged outside the bearing support part, and the tapered sleeve is sleeved on the first bearing support part; a distance sleeve is arranged at the inner end of the first bearing support part, and a tapered sleeve pressing device is arranged on the first bearing support part outside the tapered sleeve, and the tapered sleeve pressing device comprises a sleeve external thread Haver ring, a locking internal thread ring and a piston ring. The present invention can ensure that the bearing support center is close to the design value to the maximum extent, and can ensure that the tapered sleeve is smoothly pressed into the bearing tapered hole to achieve complete fit, so as to ensure that the bearing support force is stable and reliable, and the installation is convenient, the cost is saved, and the disassembly is convenient.

Description

Technical Field

[0001] The invention relates to a bearing fixing device, in particular to a vulcanizing drum bearing fixing device for a drum type vulcanizing machine. Background Art

[0002] With the development of economy, people's living standards are constantly improving, and people's requirements for the stability and reliability of mechanical equipment are also constantly increasing. As one of the most commonly used parts in mechanical equipment, with the rapid development of bearing technology at home and abroad, the structure, tolerance and internal clearance of the bearing itself can meet most of the use requirements. Among many equipment failures caused by bearing damage, the unreasonable installation and fixing device of the bearing accounts for a certain proportion. This puts higher requirements on the fixing device of the bearing. The vulcanizing drum bearing of the drum vulcanizer generally adopts a bearing with a taper on the inner hole. The roller surface diameter and length of the vulcanizing drum are relatively large. The difficulty of machining the tapered shaft head directly on the cylindrical grinder increases with the increase of the roller surface diameter and length, and the cost also increases accordingly. With the widespread application of some large-sized drum vulcanizers, in order to save costs, most of them process the bearing support position of the shaft head into a cylinder, and form a support by combining the tapered sleeve transition with the tapered bore bearing. During the assembly process of the tapered sleeve and the tapered bore bearing, it is necessary to ensure the accuracy of the bearing support position and the fit between the tapered sleeve and the inner conical surface of the bearing. The conventional practice is to use a pressure plate and bolts to push the tapered sleeve into the inner conical surface of the bearing. Since the bolts must be tightened one by one, it is inevitable that the tapered sleeve is pushed in partially first and the other parts follow. Therefore, the tapered sleeve is very likely to be tilted and cannot achieve complete fit of the conical surface, which leads to uneven force on the bearing support, affecting the service life and increasing operating costs. Summary of the invention

[0003] The present invention aims to solve the above-mentioned problems and provides a vulcanizing drum bearing fixing device for a drum vulcanizer, which can effectively reduce the bearing support position deviation and the uneven bearing force of the drum vulcanizer, ensure the stability of the vulcanizing drum, ensure the safe and stable operation of the vulcanizer, and save maintenance costs.

[0004] According to the technical solution of the present invention, the vulcanizing drum bearing fixing device of the drum vulcanizer comprises a vulcanizing drum shaft head, a bearing seat and a tapered sleeve; the vulcanizing drum shaft head is provided with a bearing support part, the bearing support part comprises a first bearing support part at the outer end and a second bearing support part at the inner end, and the diameter of the first bearing support part is smaller than that of the second bearing support part; the bearing seat sleeve is arranged outside the bearing support part, the inner end of the bearing seat is provided with an inner pressure cover, the outer end of the bearing seat is provided with an outer pressure cover, an inner oil seal cover is provided between the inner pressure cover and the second bearing support part, and an outer oil seal cover is provided between the outer pressure cover and the first bearing support part; the tapered sleeve is sleeved on the first bearing support part; the inner end of the first bearing support part is provided with a distance sleeve, and the first bearing support part between the tapered sleeve and the outer pressure cover is provided with a tapered sleeve pressing device, the tapered sleeve pressing device comprises an external threaded Haver ring sleeved on the first bearing support part, a locking internal thread ring installed on the external threaded Haver ring by thread, and a piston ring installed in an annular groove on the inner end surface of the locking internal thread ring, and a quick connector mounting hole is opened on the locking internal thread ring.

[0005] Furthermore, a hole communicating with the annular groove is formed on the outer end surface of the locking internal thread ring, a micrometer is installed in the hole, and a measuring needle of the micrometer contacts the shoulder of the piston ring.

[0006] Furthermore, an annular groove is formed on the first bearing support portion, and the externally threaded Haver ring is installed in the annular groove.

[0007] Furthermore, an O-ring is provided between the piston ring and the locking internal thread ring.

[0008] The beneficial effects of the present invention are as follows: the use of a modifiable distance sleeve can ensure that the bearing support center is as close to the design value as possible; the use of a tapered sleeve to fix the bearing can greatly reduce the processing cost of the vulcanization drum shaft head and save costs; the use of a locking internal thread ring, more precisely a hydraulic nut, can ensure that the tapered sleeve is steadily pressed into the tapered hole of the bearing to achieve complete fit, thereby ensuring that the bearing support force is stable and reliable and that the installation is convenient; the tapered sleeve can be removed by using a hydraulic nut that matches the thread of the tapered sleeve to push the tapered sleeve out of the tapered hole of the bearing, thereby facilitating disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention.

[0010] Explanation of the accompanying drawings: 1-vulcanization drum shaft head, 2-inner oil seal cover, 3-inner pressure cover, 4-bearing seat, 5-spacer sleeve, 6-bearing, 7-taper sleeve, 8-piston ring, 9-O-ring, 10-locking internal thread ring, 11-external thread Haverd ring, 12-external pressure cover, 13-external oil seal cover. DETAILED DESCRIPTION

[0011] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0012] As shown in the figure: a bearing fixing device for a vulcanizing drum of a drum vulcanizer includes a vulcanizing drum shaft head 1, a bearing seat 4 and a tapered sleeve 7. A bearing support portion is provided on the vulcanizing drum shaft head 1, and the bearing support portion includes a first bearing support portion at the outer end and a second bearing support portion at the inner end, and the diameter of the first bearing support portion is smaller than that of the second bearing support portion. The bearing seat 4 is sleeved outside the bearing support portion, and an inner pressure cover 3 is provided at the inner end of the bearing seat 4, and an outer pressure cover 12 is provided at the outer end of the bearing seat 4. An inner oil seal cover 2 is provided between the inner pressure cover 3 and the second bearing support portion, and an outer oil seal cover 13 is provided between the outer pressure cover 12 and the first bearing support portion. The tapered sleeve 7 is sleeved on the first bearing support portion. A distance sleeve 5 is provided at the inner end of the first bearing support portion. A tapered sleeve pressing device is provided on the first bearing support portion between the tapered sleeve 7 and the outer pressure cover 12, and the tapered sleeve pressing device includes an external threaded Haver ring 11, a locking internal threaded ring 10 and a piston ring 8. The external threaded Haver ring 11 is sleeved on the first bearing support part, and the locking internal threaded ring 10 is installed on the external threaded Haver ring 11. It is a steel ring with an internal thread hole and a groove on one side. The piston ring 8 is installed in the annular groove on the inner end face of the locking internal threaded ring 10. A quick connector mounting hole is opened on the locking internal threaded ring 10. The quick connector mounting hole is a threaded hole for connecting the high-pressure oil pipe of the hydraulic pump; there are two locking internal threaded rings 10, one of which is on the outer end face of the locking internal threaded ring 10, and the other is on the side wall of the locking internal threaded ring 10 (the hole must be plugged with a screw plug when not in use).

[0013] During installation, the locking inner thread ring 10 is screwed onto the matching thread of the outer thread Haver ring 11, and the piston ring 8 is retracted into the annular groove of the locking inner thread ring 10 until the piston ring 8 reaches the outer end surface of the tapered sleeve 7, and the thread of the locking inner thread ring 10 is engaged with the outer thread of the outer thread Haver ring 11 as much as possible. When high-pressure oil is pumped into the oil chamber between the locking inner thread ring 10 and the piston ring 8, the piston ring 8 is pressed to push the tapered sleeve 7 into the tapered hole of the bearing 6. According to the principle of equal pressure, the force generated by the piston ring 8 on the tapered sleeve 7 is evenly distributed over the entire circumferential surface, so the tapered sleeve 7 is completely fitted into the tapered hole of the bearing 6. After installation, loosen the oil return valve of the hydraulic pump to allow the high-pressure oil to flow back into the pump from between the locking inner thread ring 10 and the piston ring 8. Continue to screw the locking inner thread ring 10 inward until the piston ring 8 is completely retracted into the groove of the locking inner thread ring 10, and apply appropriate tightening force, and the bearing 6 is completely locked in the required position.

[0014] Specifically, a hole communicating with the annular groove is formed on the outer end surface of the locking internal thread ring 10, and a micrometer is installed in the hole. The measuring needle of the micrometer contacts the shoulder of the piston ring 8, which is used to accurately measure the axial displacement of the piston ring 8. An annular groove is formed on the first bearing support, and the external threaded Haversian ring 11 is installed in the annular groove to ensure installation stability. There are two O-rings 9 between the locking internal thread ring 10 and the piston ring 8 to ensure the sealing of the structure.

[0015] The invention is a bearing fixing device which is tightened by hydraulic pressure. The tightening force and the displacement of the tapered sleeve pushed into the tapered hole of the bearing can be strictly controlled. The structure is simple and reliable and the maintenance is convenient.

Claims

1. A vulcanizing drum bearing fixing device for a drum vulcanizer, comprising a vulcanizing drum shaft head (1), a bearing seat (4) and a tapered sleeve (7); a bearing support portion is provided on the vulcanizing drum shaft head (1), the bearing support portion comprises a first bearing support portion at an outer end and a second bearing support portion at an inner end, the diameter of the first bearing support portion being smaller than that of the second bearing support portion; the bearing seat (4) is sleeved outside the bearing support portion, an inner pressure cover (3) is provided at the inner end of the bearing seat (4), an outer pressure cover (12) is provided at the outer end of the bearing seat (4), an inner oil seal cover (2) is provided between the inner pressure cover (3) and the second bearing support portion, and an outer oil seal cover (13) is provided between the outer pressure cover (12) and the first bearing support portion; the tapered sleeve (7) is sleeved on the first bearing support portion; It is characterized in that A distance sleeve (5) is provided at the inner end of the first bearing support portion, and a tapered sleeve pressing device is provided on the first bearing support portion between the tapered sleeve (7) and the outer pressure cover (12), the tapered sleeve pressing device comprising an external threaded Haver ring (11) sleeved on the first bearing support portion, a locking internal threaded ring (10) threadedly mounted on the external threaded Haver ring (11), and a piston ring (8) mounted in an annular groove on the inner end surface of the locking internal threaded ring (10), wherein a quick connector mounting hole is provided on the locking internal threaded ring (10).

2. The vulcanizing drum bearing fixing device of a drum vulcanizing machine according to claim 1, It is characterized in that A hole communicating with the annular groove is formed on the outer end surface of the locking internal thread ring (10), a micrometer is installed in the hole, and the measuring needle of the micrometer contacts the shaft shoulder of the piston ring (8).

3. The vulcanizing drum bearing fixing device of a drum vulcanizing machine according to claim 1, It is characterized in that An annular groove is formed on the first bearing support portion, and the externally threaded Haver ring (11) is installed in the annular groove.

4. The vulcanizing drum bearing fixing device of a drum vulcanizing machine according to claim 1, It is characterized in that An O-type sealing ring (9) is provided between the piston ring (8) and the locking internal thread ring (10).

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