CN102730524A

CN102730524A - Tractor

Info

Publication number: CN102730524A
Application number: CN2012102207411A
Authority: CN
Inventors: 朱龙; 席荣盛; 张雷泉
Original assignee: Kinetek De Sheng Foshan Motor Co Ltd
Current assignee: Kinetek De Sheng Foshan Motor Co Ltd
Priority date: 2012-06-29
Filing date: 2012-06-29
Publication date: 2012-10-17

Abstract

The invention relates to a tractor for an elevator. The tractor comprises a rotor, a stator, a rotation shaft, a traction wheel, a non-sealing bearing, a non-sealing bearing outer cover, a non-sealing bearing inner cover, a rear bearing, a rear bearing cover and an oil inlet channel; the rotation shaft is arranged on the stator through the non-sealing bearing and the rear bearing; the oil inlet channel is communicated with an oil cavity of the non-sealing bearing; and the non-sealing bearing inner cover or the non-sealing bearing outer cover is provided with a pressure relief port which is communicated with the oil cavity of the non-sealing bearing and an oil collector. The tractor is reasonable in structural design; an automatic pressure reliving device is arranged on the oil cavity of the non-sealing bearing, so that liquid oil or gaseous oil in the oil cavity of the non-sealing bearing can be prevented from entering the stator, the rotor or other components; and therefore, the tractor is effectively protected, the accidents of the elevator are avoided, and the safety performance of the elevator is improved. The oil collector is arranged outside the rear bearing cover, so that the tractor is not needed to be transformed greatly, cost is not increased, and the automatic pressure relieving device also has the effect of discharging oil.

Description

Towing machine

Technical field

The present invention relates to the towing machine that a kind of elevator is used.

Background technology

Existing towing machine comprises rotor, stator, rotating shaft, traction sheave, no sealed bearings, no sealed bearings enclosing cover, no sealed bearings inner cap, rear bearing, rear bearing cover, oil inlet passage and oil drain passage; Rotating shaft is installed in the stator through no sealed bearings and rear bearing; Oil inlet passage is communicated with the oil pocket of no sealed bearings; Oil drain passage is communicated with the oil pocket of no sealed bearings; Be provided with plug cock in the oil drain passage, plug cock only just can be opened when towing machine is shut down, and plug cock must keep the shutoff to oil drain passage under the towing machine mode of operation.Push the lipid lubricant through oil inlet passage toward no sealed bearings oil pocket.If when the contaminated needs of lubricant are changed, have only shutdown to open plug cock and just can discharge the lipid lubricant.

In the middle of actual use, when the user clamp-ons more grease toward no sealed bearings oil pocket sometimes, owing to expanding with heat and contract with cold; The oil pocket of no sealed bearings will can not contained any more grease; Oil pressure increases, and when arriving certain numerical value greatly, must find the relative thin weakness of the no sealed bearings oil circuit of sealing; Leakage of oil pressure release then causes elevator to have an accident.

Summary of the invention

Therefore, the object of the present invention is to provide a kind of towing machine of drain pressure automatically when making oil pressure in the no sealed bearings oil pocket meet or exceed certain standard in working order down.

Above-mentioned purpose realizes through following technical scheme.

A kind of towing machine; Comprise rotor, stator, rotating shaft, traction sheave, no sealed bearings, no sealed bearings enclosing cover, no sealed bearings inner cap, rear bearing, rear bearing cover, oil inlet passage; Rotating shaft is installed on stator through no sealed bearings and rear bearing; Oil inlet passage is communicated with the oil pocket of no sealed bearings, said no sealed bearings inner cap or do not have sealed bearings and be covered with pressure relief opening outward, and pressure relief opening is communicated with no sealed bearings oil pocket and collector tank.

Above-mentioned purpose also can be done following further perfect.

The said pressure relief opening outside is provided with the pressure release screw, and the pressure release screw axial is hollow, the inner pressure relief opening that inserts of pressure release screw, and pressure release screw outer end is communicated with collector tank.Also can do further to change is exactly that said pressure release screw outer end is communicated with overflow oil tube, and overflow oil tube is communicated with collector tank.

Above-mentioned pressure relief opening position is not higher than the axle center of rotating shaft.

Structure of the present invention is established rationally; Oil pocket through to no sealed bearings increases an automatic discharging pressure power apparatus; The liquid state or the gaseous state oil that can prevent not have in the sealed bearings oil pocket get in stator, rotor or other parts; Protect towing machine effectively, prevented that elevator from having an accident, improved the safety performance of elevator.Because collector tank is installed on the rear bearing cover outside, need not do too much change to towing machine, does not increase cost, this automatic discharging pressure power apparatus also plays the oil extraction effect simultaneously.

Description of drawings

Fig. 1 is the structural representation of present embodiment 1.

Fig. 2 is the enlarged diagram of no sealed bearings, mainly reflects the concrete structure of two hydraulic fluid ports.

Fig. 3 is the structural representation of embodiment 2.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description.

Embodiment 1; In conjunction with Fig. 1 and Fig. 2; A kind of towing machine; Comprise rotor 1, stator 2, rotating shaft 3, traction sheave 4, no sealed bearings 5, no sealed bearings enclosing cover 6, no sealed bearings inner cap 7, rear bearing 8, rear bearing cover 9, oil inlet passage 10, rotating shaft 3 is installed on stator 2 through no sealed bearings 5 and rear bearing 8, and oil inlet passage 10 passes traction sheave 4, no sealed bearings enclosing cover 6, stator 2 respectively and is communicated with the oil pocket 12 of no sealed bearings.

Be lower than rotating shaft 3 shaft core positions at no sealed bearings inner cap 7 and be provided with pressure relief opening 13; Pressure relief opening 13 inboards are communicated with the oil pocket 12 of no sealed bearings; Pressure relief opening 13 outsides are provided with pressure release screw 14, and pressure release screw 14 is axially hollow, the pressure release screw 14 inner pressure relief openings 13 that insert; Pressure release screw 14 outer ends are connected with overflow oil tube 15, and overflow oil tube 15 passes rear bearing cover 9 and is connected with collector tank 16.When pushing grease toward no sealed bearings oil pocket, grease also can be squeezed into pressure relief opening, to stop up pressure relief opening; Temperature build-up after no sealed bearings rotates a period of time, grease transfers liquid state and gaseous state to by half curdled appearance, and the oil pocket internal pressure raises; Also liquefy slowly of the grease in the pressure relief opening simultaneously because the aperture of pressure relief opening, pressure release screw and overflow oil tube is thinner, in certain pressure is arranged; Have only when the internal pressure of no sealed bearings oil pocket is higher than the pressure at pressure relief opening place; Overflow oil tube could be drained, and to reduce the pressure in the no sealed bearings oil pocket, prevents not have past other parts seepage of oil in the sealed bearings oil pocket.

Embodiment 2; In conjunction with Fig. 3; A kind of towing machine; Comprise rotor 1, stator 2, rotating shaft 3, traction sheave 4, no sealed bearings 5, no sealed bearings enclosing cover 6, no sealed bearings inner cap 7, rear bearing 8, rear bearing cover 9, oil inlet passage 10, rotating shaft 3 is installed on stator 2 through no sealed bearings 5 and rear bearing 8, and oil inlet passage 10 passes traction sheave 4, no sealed bearings enclosing cover 6, stator 2 respectively and is communicated with the oil pocket 12 of no sealed bearings.

Be lower than rotating shaft 3 shaft core positions at no sealed bearings enclosing cover 6 and be provided with pressure relief opening 13; Pressure relief opening 13 inboards are communicated with the oil pocket 12 of no sealed bearings; Pressure relief opening 13 outsides are provided with pressure release screw 14; Pressure release screw 14 is axially hollow, the pressure release screw 14 inner pressure relief openings 13 that insert, and pressure release screw 14 outer ends are communicated with collector tank 16.

Claims

1. towing machine; Comprise rotor, stator, rotating shaft, traction sheave, no sealed bearings, no sealed bearings enclosing cover, no sealed bearings inner cap, rear bearing, rear bearing cover, oil inlet passage; Rotating shaft is installed on stator through no sealed bearings and rear bearing; Oil inlet passage is communicated with the oil pocket of no sealed bearings, it is characterized in that: said no sealed bearings inner cap or do not have sealed bearings and be covered with pressure relief opening outward, pressure relief opening is communicated with no sealed bearings oil pocket and collector tank.

2. towing machine according to claim 1 is characterized in that: the said pressure relief opening outside is provided with the pressure release screw, and the pressure release screw axial is hollow, the inner pressure relief opening that inserts of pressure release screw, and pressure release screw outer end is communicated with collector tank.

3. towing machine according to claim 2 is characterized in that: said pressure release screw outer end is communicated with overflow oil tube, and overflow oil tube is communicated with collector tank.

4. according to claim 1 or the described towing machine of 3 arbitrary claims, it is characterized in that: said pressure relief opening position is not higher than the axle center of rotating shaft.