CN219529787U - Novel leak protection oil return structure is used to construction lift speed reducer - Google Patents

Abstract

A novel leak-proof oil return structure for a construction lifting speed reducer belongs to the technical field of construction lifting speed reducers. The motor is characterized in that the motor comprises a motor, a reduction gearbox and a front cover for mounting the motor on the reduction gearbox, a motor shaft in the motor drives a gear pair in the reduction gearbox to be meshed and driven, a bearing seat and an oil seal seat are convexly arranged on the inner side of the front cover, an inner ring of a bearing of the motor is supported on the motor shaft, and an outer ring of the bearing is supported on the bearing seat: the motor side oil seal and the reduction box side oil seal are sleeved on the shaft section of the motor shaft, which is positioned at the bearing and the shaft end, in a spacing mode, the outer rings of the motor side oil seal and the reduction box side oil seal are matched with an oil seal seat, an annular oil cavity is formed by surrounding the motor side oil seal, the reduction box side oil seal, the motor shaft and the oil seal seat, and an oil return hole communicated with the reduction box is formed in the position, corresponding to the oil cavity, of the oil seal seat. The advantages are that: lubricating oil in the reduction gearbox is prevented from leaking into the motor after the lip of the oil seal is worn, and the service life of the motor is prolonged.

Description

Novel leak protection oil return structure is used to construction lift speed reducer

Technical Field

The utility model belongs to the technical field of construction lifting speed reducers, and particularly relates to a novel leakage-proof oil return structure for a construction lifting speed reducer.

Background

In the past construction lifting speed reducer, a motor is in transmission connection with a reduction gearbox through a coupler, so that the size of the whole speed reducer is relatively large, along with the development of the construction lifting speed reducer towards miniaturization trend, the components are required to be integrated, and the coupler is omitted from the motor and the reduction gearbox to adopt a direct connection mode. However, in the construction lift speed reducer that directly links, the motor shaft of motor stretches into the reducing gear box and gear pair meshing transmission, and the motor directly drives the reducing gear box operation, installs the oil blanket between motor and reducing gear box, prevents that lubricating oil in the reducing gear box from getting into the motor, and after the reducing gear operation certain time, the oil blanket lip wearing and tearing, lubricating oil in the reducing gear box will leak in the motor, and then influences motor work and shortens its life, finally has to change the motor. The replacement of the motor is troublesome for the direct-connection type construction hoist speed reducer, and the on-site disassembly and assembly are difficult, so that the sealing performance between the motor part and the reduction box part must be improved if the service life of the construction hoist speed reducer is to be ensured.

In view of the above prior art, there is a need for a rational improvement of the shaft seal structure of the existing construction hoist speed reducer. To this end, the inventors have advantageously devised that the technical solutions described below are created in this context.

Disclosure of Invention

The utility model aims to provide a novel leakage-proof oil return structure for a construction lifting speed reducer, which is provided with two oil seals, wherein an oil return hole is formed in an oil seal seat between the two oil seals, so that lubricating oil in a speed reducer is prevented from leaking into a motor after the lip of the oil seal is worn, and the service life of the motor is effectively prolonged.

The utility model accomplishes the task like this, a construction hoist reducer is with novel leak protection oil return structure, including motor, reducing gear box and install the protecgulum on the reducing gear box with the motor, the motor shaft in the motor drives the gear pair meshing transmission in the reducing gear box, the inboard of protecgulum protruding is equipped with bearing frame and oil blanket seat, the inner circle of the bearing of motor supports on the motor shaft, and the outer lane of bearing supports on the bearing frame, and characteristics are: the motor side oil seal and the reduction box side oil seal are sleeved on the shaft section of the motor shaft, which is positioned at the bearing and the shaft end, in a spacing mode, the outer rings of the motor side oil seal and the reduction box side oil seal are matched with an oil seal seat, an annular oil cavity is formed by surrounding the motor side oil seal, the reduction box side oil seal, the motor shaft and the oil seal seat, and an oil return hole communicated with the reduction box is formed in the position, corresponding to the oil cavity, of the oil seal seat.

In a specific embodiment of the present utility model, one end of the front cover is fixedly connected with a motor casing of the motor, and the other end of the front cover is fixedly connected with a box body of the reduction gearbox.

In another specific embodiment of the utility model, a step is machined on the shaft end of the motor shaft corresponding to the oil cavity.

In still another specific embodiment of the present utility model, a shaft section of the step, on which the motor-side oil seal is mounted, of the motor shaft on the motor side is a motor-side oil seal block, a shaft section of the step, on which the reduction-gearbox-side oil seal is mounted, of the motor shaft on the reduction gearbox side is a reduction-gearbox-side oil seal block, and the motor-side oil seal block and the reduction-gearbox-side oil seal block are processed to have different shaft diameters to form the step.

In still another specific embodiment of the present utility model, a slinger is sleeved on a side of the motor shaft, which is located near the reduction gearbox, of the reduction gearbox side oil seal.

The utility model has the beneficial effects that due to the adoption of the structure, the utility model has the following advantages: in order to prevent the lubricating oil in the reduction gearbox from entering the motor and building multiple protections, the oil retainer firstly blocks most of the lubricating oil which is thrown out by the rotation of the gear pair, and a small part of the lubricating oil which passes through the oil retainer is blocked by the oil seal at the side of the reduction gearbox, when the oil seal at the side of the reduction gearbox is worn, the lubricating oil which enters the oil cavity is blocked by a step on a motor shaft and thrown out from an oil return hole, and the oil seal at the side of the motor carries out final protection on the motor.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is an enlarged view of a portion a in fig. 1.

In the figure: 1. motor, 11, motor shaft, 111, shaft end, 112, step, 113, motor side oil seal gear 114, a reduction box side oil seal gear, 12, a motor shell and 13, a bearing; 2. a reduction gearbox and a box body 21; 3. the front cover, 31, the bearing seat, 32, the oil seal seat, 321, the oil return hole; 4. a motor side oil seal; 5. a reduction gearbox side oil seal; 6. an oil chamber; 7. oil slinger.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, any reference to the directions or azimuths of up, down, left, right, front and rear is based on the positions shown in the corresponding drawings, and therefore, should not be construed as a limitation on the technical solutions provided by the present utility model.

Referring to fig. 1 and 2, the utility model relates to a novel anti-leakage oil return structure for a construction lifting speed reducer, which comprises a motor 1, a speed reducer 2 and a front cover 3 for mounting the motor 1 on the speed reducer 2, wherein a motor shaft 11 in the motor 1 drives a gear pair in the speed reducer 2 to carry out meshing transmission, and specifically, a shaft end 111 of the motor shaft 11 carries out meshing transmission with the gear pair in the speed reducer 2. One end of the front cover 3 is fixedly connected with the motor shell 12 of the motor 1, and the other end is fixedly connected with the box body 21 of the reduction gearbox 2. The inner side of the front cover 3 is convexly provided with a circular bearing seat 31, and the bearing seat 31 extends towards the direction of the reduction gearbox 2 to form an oil seal seat 32. An inner ring of a bearing 13 of the motor 1 is supported on the motor shaft 11, and an outer ring of the bearing 13 is supported on a bearing seat 31. The motor side oil seal 4 and the reduction box side oil seal 5 are sleeved on the shaft section of the motor shaft 11, which is positioned on the bearing 13 and the shaft end 111, the outer rings of the motor side oil seal 4 and the reduction box side oil seal 5 are matched with the oil seal seat 32, and the motor side oil seal 4, the reduction box side oil seal 5, the motor shaft 11 and the oil seal seat 32 enclose an annular oil cavity 6. The oil seal seat 32 is provided with an oil return hole 321 communicated with the reduction gearbox 2 at a position corresponding to the oil cavity 6.

The step 112 is machined on the shaft section of the motor shaft 11 corresponding to the oil cavity 6, the shaft section of the motor shaft 11, which is positioned on one side of the motor 1, of the step 112 and is provided with the motor side oil seal rail 113, the shaft section of the motor shaft 11, which is positioned on one side of the reduction gearbox 2, of the step 112 and is provided with the reduction gearbox side oil seal rail 114, and the diameters of the shafts machined by the motor side oil seal rail 113 and the reduction gearbox side oil seal rail 114 are different, so that the step 112 is formed.

And one side, close to the reduction gearbox 2, of the motor shaft 11, which is positioned on the reduction gearbox side oil seal 5, is sleeved with a oil retainer 7, and most of lubricating oil thrown out by the rotation of a gear pair in the reduction gearbox 2 is blocked.

With continued reference to fig. 1 and 2, the working principle of the leak-proof oil return structure of the present utility model is: when the motor side oil seal 4 and the reduction box side oil seal 5 are in a normal state, the reduction box side oil seal 5 can block lubricating oil entering through the oil retainer 7 in the reduction box 2, so that the lubricating oil is prevented from entering the motor 1, and at the moment, oil gas in the reduction box 2 can lubricate the motor side oil seal 4 through the arranged oil return hole 321. After the subsequent motor 1 runs at a high speed for a certain period, the oil seal lip wear starts to leak oil, the anti-leakage oil return structure starts to work, the lubricating oil permeated by the speed reduction box side oil seal 5 is immersed into the oil cavity 6 along the rotating motor shaft 11, the step 112 on the motor shaft 11 can prevent the lubricating oil from moving to the motor side oil seal 4 and being thrown to the periphery of the oil cavity 6 by centrifugal force, and finally the lubricating oil flows back into the speed reduction box 2 through the oil return hole 321, so that the speed reduction box can be ensured not to leak oil even if the oil seal lip wear.

Claims (5)

1. The utility model provides a construction lift speed reducer is with novel leak protection oil return structure, includes motor (1), reducing gear box (2) and installs protecgulum (3) on reducing gear box (2) with motor (1), motor shaft (11) in motor (1) drive gear pair meshing transmission in reducing gear box (2), the inboard of protecgulum (3) is protruding to be equipped with bearing frame (31) and oil blanket seat (32), the inner circle of bearing (13) of motor (1) supports on motor shaft (11), and the outer lane of bearing (13) supports on bearing frame (31), its characterized in that: the motor is characterized in that a motor side oil seal (4) and a reduction gearbox side oil seal (5) are sleeved on the shaft section of the motor shaft (11) which is positioned on the bearing (13) and the shaft end (111), the outer ring of the motor side oil seal (4) and the outer ring of the reduction gearbox side oil seal (5) are matched with an oil seal seat (32), an annular oil cavity (6) is formed by encircling the motor side oil seal (4), the reduction gearbox side oil seal (5), the motor shaft (11) and the oil seal seat (32), and an oil return hole (321) communicated with the reduction gearbox (2) is formed in the position, corresponding to the oil cavity (6), of the oil seal seat (32).

2. The novel leak-proof oil return structure for a construction hoist speed reducer according to claim 1, wherein: one end of the front cover (3) is fixedly connected with a motor shell (12) of the motor (1), and the other end of the front cover is fixedly connected with a box body (21) of the reduction gearbox (2).

3. The novel leak-proof oil return structure for a construction hoist speed reducer according to claim 1, wherein: a step (112) is machined on the shaft end of the motor shaft (11) corresponding to the oil cavity (6).

4. The novel leak-proof oil return structure for a construction hoist speed reducer according to claim 3, wherein: the shaft section of the motor side oil seal (4) of the motor shaft (11) positioned on one side of the motor (1) of the step (112) is a motor side oil seal gear (113), the shaft section of the motor shaft (11) positioned on one side of the reduction gearbox (2) of the step (112) and provided with the reduction gearbox side oil seal (5) is a reduction gearbox side oil seal gear (114), and the diameters of the shafts processed by the motor side oil seal gear (113) and the reduction gearbox side oil seal gear (114) are different to form the step (112).

5. The novel leak-proof oil return structure for a construction hoist speed reducer according to claim 1, wherein: and an oil retainer (7) is sleeved on one side, close to the reduction gearbox (2), of the motor shaft (11), which is positioned on the reduction gearbox side oil seal (5).