CN217683173U - Speed reducer sealing device and speed reducer - Google Patents

Abstract

The utility model relates to a sealing device discloses a speed reducer sealing device and speed reducer, including seal assembly and return line, seal assembly sets up on the end cover of speed reducer, seal assembly includes oil blanket, fixing device and seal baffle, seal baffle passes through fixing device installs on the end cover, just seal baffle with pass through between the pivot of speed reducer the oil blanket is sealed, in order to pass through seal baffle the oil blanket and the common vacuole formation of pivot of speed reducer, the cavity with pass through between the speed reducer return line is linked together, in order to pass through return line flows back the grease of oozing in the speed reducer. The utility model discloses can flow back through the grease with the speed reducer effluvium to this avoids the grease to ooze to the speed reducer outside.

Description

Speed reducer sealing device and speed reducer

Technical Field

The utility model relates to a sealing device especially relates to a speed reducer sealing device. In addition, still relate to a speed reducer.

Background

The reducer is large in size, although the sealing ring is arranged at the connecting end of the rotating shaft of the reducer, the reducer is large in impact load, the sealing ring is easy to wear and leak oil, the high-speed shaft at the sealing ring is small in abrasion due to long-term contact with the sealing ring, a cover needs to be uncovered and a tooth pulling adaptor needs to be replaced, workload is high, and time is long. The sealing ring needs to be replaced actually, and the sealing ring is generally replaced when the speed reducer is replaced regularly. The same phenomenon occurs when oil leaks at the output end of the output shaft. In addition, the oil leakage is serious, so that the oil quantity in the thin oil tank for supplying oil is insufficient, the minimum oil level height of the oil tank during normal operation is 250 mm, and the oil level height is often between 100 mm and 110 mm due to untimely or insufficient oil supplement, so that the oil pump often pumps air and residues (mainly sealant residues falling into the oil tank during maintenance of the speed reducer) in the oil tank, the oil pump is easy to damage, and the speed reducer is damaged due to insufficient oil supply or blockage of an oil supply pipe to form vicious circle

At present, the speed reducer is sealed by matching an end cover of the speed reducer with an oil seal. Although the existing sealing technology can meet the condition of no leakage when the speed reducer operates in the early stage, the oil seal of the speed reducer leaks due to the reasons of abrasion in long-term operation, low later-stage installation precision, uneven quality of spare parts and the like, and the requirement of on-site safety production is not met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the main technical problem that a speed reducer sealing device is provided, can seal many times to the speed reducer to can carry out outside backward flow and owing to the grease that oozes out to the speed reducer and owing to

The oil seal can be replaced without disassembly after being externally arranged.

The utility model discloses the technical problem that the second aspect will be solved provides a speed reducer, can flow back through the grease with the speed reducer seepage to this avoids the grease to ooze to the speed reducer outside.

In order to solve the technical problem, the utility model provides an aspect provides a speed reducer sealing device, including seal assembly and return line, seal assembly sets up on the end cover of speed reducer, seal assembly includes oil blanket, fixing device and seal baffle, seal baffle passes through fixing device installs on the end cover, just seal baffle with pass through between the pivot of speed reducer the oil blanket is sealed, in order to pass through seal baffle the oil blanket and the common vacuole formation of pivot of speed reducer, the cavity with pass through between the speed reducer return line is linked together, in order to pass through return line backward flow the grease of oozing in the speed reducer.

Preferably, the air outlet pipe is communicated with the cavity, and the connecting end of the air outlet pipe and the cavity is arranged at the top of the cavity. Through this preferred technical scheme, the setting of outlet duct can be with the inside and outside atmospheric pressure of balanced cavity for the grease that oozes in the speed reducer can flow back smoothly and enter the speed reducer.

Further preferably, the grease backflow prevention device further comprises a pressurizing device, wherein the pressurizing device is communicated with the air outlet pipe and is suitable for pressurizing the cavity so as to drive the grease in the cavity to backflow. Through this preferred technical scheme, can carry out the pressure boost to the cavity through supercharging device to this grease that accelerates to ooze in the end cover can flow back into in the speed reducer.

Preferably, the end cover is provided with a mounting hole and a positioning hole, so that the mounting position of the sealing baffle plate can be positioned through the positioning hole, and the end cover is fixed at the oil outlet of the speed reducer through the mounting hole to form primary sealing. Through this preferred technical scheme, through the setting of mounting hole and locating hole, can will make the oil-out department at the speed reducer that the end cover can be swiftly stable install, the setting of locating hole enables seal assembly can be by stable the installation on the end cover.

Further preferably, the speed reducer and the connecting ends of the cavity and the return pipeline are sealed through sealing elements. Through this preferred technical scheme, seal return line and the link of speed reducer and cavity through the sealing member to this guarantees that return line and speed reducer and the link department of cavity can not ooze the grease, thereby influences return system's normal operating.

Preferably, a sealing ring is arranged at the joint of the end cover and the rotating shaft. Through this preferred technical scheme, still be equipped with the sealing washer in the junction of end cover and pivot, come the end cover through the sealing washer and further seal to this further improves the sealed effect of end cover, thereby avoids the grease in the speed reducer too much oozing and influence the normal operating of speed reducer.

Further preferably, a filtering screen is arranged at the joint of the return pipeline and the cavity. Through this preferred technical scheme, can filter the grease that the speed reducer built in to the backward flow in the cavity through the setting of filter screen to this guarantees the purity of the grease that the backward flow advances in the speed reducer, thereby avoids in the cavity or during external impurity sneaks into the grease of oozing out influence the holistic purity of grease in the speed reducer.

Preferably, the sealing baffle is a bent member.

Further preferably, the oil-sealed inner retainer ring is arranged in the cavity, so that the oil seal can be limited to move towards the interior of the speed reducer through the oil-sealed inner retainer ring. Through this preferred technical scheme, the setting of retaining ring can restrict the oil blanket and produce the displacement to the direction of speed reducer in the oil blanket to this guarantees the stability of oil blanket position, can further prevent that the grease from oozing through the cavity simultaneously.

The utility model discloses the second aspect provides a speed reducer, include the first aspect speed reducer sealing device.

Through the technical scheme, the utility model discloses a speed reducer sealing device is through setting up seal assembly on the end cover at the speed reducer, seal assembly adopts the mode that oil blanket and seal baffle combined together to seal, through installing the oil blanket between seal baffle and speed reducer pivot, make seal baffle, vacuole formation between oil blanket and the speed reducer pivot, the grease that the speed reducer oozes can flow into in this cavity, and be equipped with return line between the batch oil tank of cavity and speed reducer, return line flows back the grease that the speed reducer oozes in the cavity to the oil storage tank of speed reducer again, make the grease that oozes can be by cyclic utilization, with this grease that avoids oozing in the speed reducer flow to the speed reducer outside, thereby reach the effect that the speed reducer grease does not have the seepage.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

Fig. 1 is a schematic structural view of a sealing device of a speed reducer according to an embodiment of the present invention;

fig. 2 is a sectional view of a sealing device of a speed reducer according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an end cover of the sealing device of the speed reducer according to the embodiment of the present invention.

Reference numerals

1. Speed reducer 2 seal assembly

21. Oil seal 22 fixing device

23. Sealing baffle 3 rotating shaft

4. Speed reducer coupling 5 return line

6. 7 end covers of outlet duct

71. Positioning hole 72 mounting hole

8. Cavity 9 supercharging device

10. Oil seal inner retainer ring 11 filtering screen

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It should be understood that the description herein is provided for illustration and explanation of the invention and is not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and for example, the term "connected" may be either a fixed connection, a detachable connection, or an integral connection; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The utility model discloses an embodiment of 1 sealing device of speed reducer, as shown in figure 1, including seal assembly 2 and return line 5, seal assembly 2 sets up between 1's end cover 7 of speed reducer and speed reducer coupling wheel 4, and 1's end cover 7 of speed reducer is as the seal part of 1 hydraulic fluid port of speed reducer, and it can play first sealed effect to speed reducer 1, and sets up seal assembly 2 and can be on 7's basis of end cover on end cover 7, to 1 business turn over secondary seal of speed reducer to can be better carry out the sealing treatment to speed reducer 1, avoid 1 oil impregnate of speed reducer. The sealing assembly 2 comprises an oil seal 21, a fixing device 22 and a sealing baffle plate 23, the sealing baffle plate 23 is installed on the end cover 7 through the fixing device 22, the sealing baffle plate 23 is arranged along the rotating shaft 3 of the speed reducer 1, the oil seal 21 is arranged between the sealing baffle plate 23 and the rotating shaft 3 of the speed reducer 1, so that a cavity 8 can be formed by the sealing baffle plate 23, the oil seal 21 and the rotating shaft 3 of the speed reducer 1 together, when the speed reducer 1 seeps oil, the seeped oil flows into the cavity 8 after flowing through the end cover 7, the cavity 8 is arranged around the rotating shaft 3 of the speed reducer 1, therefore, after the oil seeps out from the speed reducer 1, the seeped oil can be collected to the bottom of the cavity 8 along the end cover 7 under the action of gravity, link to each other through return line 5 between the oil storage tank of cavity 8 and speed reducer 1, return line 5 sets up the bottom at cavity 8, assemble behind cavity 8 bottom when the grease of seepage, return line 5 can carry out the water conservancy diversion with the grease of assembling in cavity 8 bottom, finally with the grease of seepage leading-in again to speed reducer 1 in the oil storage tank, wherein, return line 5 sets up the outside in speed reducer 1 main part, therefore, can accomplish the outside backward flow to the grease of seepage and the recycle of grease through return line 5, adopt this backward flow mode can avoid the problem emergence of speed reducer 1 grease seepage to speed reducer 1 surface, reach the effect that speed reducer 1 does not have the seepage with this. In addition, because the oil seal 21 is directly installed between the sealing baffle plate 23 and the rotating shaft 3 of the speed reducer 1, when the oil seal 21 needs to be replaced, the oil seal 21 can be replaced without detaching the sealing baffle plate 23, so that the oil seal is more convenient to replace.

The utility model discloses an embodiment of 1 sealing device of speed reducer, as shown in figure 1, still include outlet duct 6, outlet duct 6 links to each other with cavity 8, can communicate cavity 8 and external atmosphere through setting up of outlet duct 6 to this atmospheric pressure and the external atmospheric pressure in the balanced cavity 8. Avoid the in-process that grease in the speed reducer 1 oozes, because the pressure in cavity 8 is crossed lowly and leads to the unable smooth oil storage tank to speed reducer 1 of along return line 5 of oil storage of oozing out to make the unable external circulation of accomplishing between the oil storage tank of oozing out and speed reducer 1, consequently, adopt venthole and outside air to be linked together, can guarantee that the grease that oozes out in the cavity 8 can be smooth flow to the oil storage tank from return line 5, thereby form the outside reflux system of oozing the grease.

Specifically, in order to avoid impurities such as dust in the outside air to flow into the cavity 8 through the outlet duct 6, a filtering device can be arranged at the communication position of the outlet duct 6 and the cavity 8, for example, a filter screen, a filter element and the like can be adopted, when the outside air flows into the cavity 8 along the outlet duct 6, the impurities contained in the air contact with the filtering device at the moment, the impurities contained in the air are adsorbed behind the filtering device, therefore, the filtered air enters the cavity 8, the impurities contained in the impurities cannot be mixed with the oil leaked out of the speed reducer 1, the purity of the leaked oil is ensured, the leaked oil can be prevented from flowing back into the oil storage tank of the speed reducer 1 again, the impurities are mixed with the oil in the oil storage tank, and when the oil mixed with the impurities acts on the lubrication of the speed reducer 1, the rotating shaft 3 of the speed reducer 1 is easily seriously worn, and the service life of the speed reducer 1 is influenced.

More specifically, in order to prevent grease in the cavity 8 from flowing into the oil storage tank of the speed reducer 1 smoothly along the return line 5, the other end of the air outlet pipe 6 may be connected to a pressure increasing device 9, the cavity 8 may be pressurized by the pressure increasing device 9, so as to increase the atmospheric pressure in the cavity 8, and the atmospheric pressure in the cavity 8 is increased to be greater than the atmospheric pressure in the oil storage tank of the speed reducer 1, so as to allow grease seeped out from the cavity 8 to flow into the oil storage tank of the speed reducer 1 through the return line 5 under the action of the atmospheric pressure.

The utility model discloses an embodiment of speed reducer 1 sealing device, as shown in fig. 3, in order to install the stable oil-out at speed reducer 1 of end cover 7, consequently be provided with a plurality of mounting holes 72 and locating hole 71 on end cover 7, through the setting of locating hole 71 for end cover 7 can accurately install in the oil-out department of speed reducer 1. In addition, the positioning hole 71 is arranged to enable the end cover 7 to be matched with a bayonet of the positioning hole 71 of the oil outlet of the speed reducer 1, so that the end cover 7 and the oil outlet of the speed reducer 1 can be stably installed. The setting of locating hole 71 can also make between end cover 7 and the speed reducer 1 in the in-process of installation more convenient, locating hole 71 bayonet socket of seting up on locating hole 71 through the end cover 7 corresponds with the speed reducer 1, during the installation, only need pass the locating hole 71 of end cover 7 and set up the locating hole 71 bayonet socket on the speed reducer 1 with fixing bolt in order, then locking can accomplish the installation fixed to end cover 7, in addition, the fixed mounting of end cover 7 has realized the first seal to the oil-out of speed reducer 1, can greatly reduce the oozing volume of the grease in the speed reducer 1. Because the end cover 7 is further provided with the sealing assembly 2, the sealing assembly 2 and the end cover 7 are fixed through the mounting hole 72, the bolt hole formed in the sealing assembly 2 corresponds to the mounting hole 72 formed in the end cover 7, and then the sealing assembly 2 is fixedly mounted on the end cover 7 by sequentially penetrating the sealing assembly 2 and the mounting hole 72 through the fixing bolt.

The utility model discloses an embodiment of 1 sealing device of speed reducer, speed reducer 1 adopts the sealing member sealed with return line 5's link, through setting up the sealing member at link between them to this avoids return line 5 to go back the in-process that advances speed reducer 1 with the grease reflux of effluvium, produces the secondary seepage in speed reducer 1 and return line 5's link mouth department. In addition, a sealing member for sealing is also provided at the connection end between the cavity 8 and the return line 5, so as to prevent oil leakage at the connection end between the cavity 8 and the return line 5 during the process of returning the oil.

Specifically, the sealing ring is arranged at the joint of the end cover 7 and the rotating shaft 3, the sealing effect of the end cover 7 can be further improved and guaranteed through the arrangement of the sealing ring, the amount of oil liquid seeped out from the end cover 7 at the oil outlet of the speed reducer 1 is reduced, in addition, the arrangement of the sealing ring can not only seal the oil inside the speed reducer 1, and the phenomenon that the rotating shaft 3 of the speed reducer 1 seeps out through the rotating shaft 3 of the speed reducer 1 in the motion process is avoided. The arrangement of the sealing ring can also prevent impurities in the cavity 8 from being directly mixed into the oil storage tank of the speed reducer 1 from the rotating shaft 3 of the speed reducer 1, so that the quality of grease in the oil storage tank of the speed reducer 1 is influenced.

The utility model discloses an embodiment of 1 sealing device of speed reducer, as shown in fig. 2, still be equipped with filter screen 11 in return line 5 and cavity 8's junction, can be at the in-process of backward flow through filter screen 11's setting, screen out the impurity in the grease in the cavity 8, thereby guarantee to the purity of the grease of 1 internal reflux of speed reducer, the grease of avoiding oozing is mingled with other impurity in cavity 8, thereby lead to the in-process at the grease backward flow, the impurity in the cavity 8 blocks up return line 5, thereby arouse that return line 5's circulation is not smooth. In addition, if the aperture of the filtering screen 11 is large, after a part of small-particle-size fixed particles are mixed in the grease and flow back into the oil storage tank of the speed reducer 1, the mixed fixed particles can be dispersed into the whole oil storage tank, so when the rotating shaft 3 of the speed reducer 1 rotates, the grease can rub against the rotating shaft 3 of the speed reducer 1, the outer surface layer of the rotating shaft 3 of the speed reducer 1 can be greatly damaged, the rotating shaft 3 of the speed reducer 1 is abraded by the mixed fixed particles, and the service life of the rotating shaft 3 of the speed reducer 1 is greatly influenced.

The utility model discloses an embodiment of 1 sealing device of speed reducer, as shown in fig. 2, seal baffle 23 sets up to the component of bending, specifically buckles to the direction of keeping away from 1 pivot 3 of speed reducer and being close to 1 pivot 3 of speed reducer respectively for the both ends with seal baffle 23, with seal baffle 23 to the one end and the end cover 7 fixed connection of keeping away from 1 pivot 3 direction of speed reducer and buckling, carries out circumference parcel with 1 pivot 3 of speed reducer to the one end of being close to 3 direction of 1 pivot of speed reducer and buckling of seal baffle 23. After the sealing baffle 23 is installed, a cavity 8 is formed between the sealing baffle 23 and the rotating shaft 3 of the speed reducer 1, and the cavity 8 can be used for storing grease seeped out from the speed reducer 1.

An oil seal 21 is further provided between the seal retainer 23 and the rotation shaft 3 of the reduction gear 1, and the oil seal 21 is attached to one end of the seal retainer 23 bent toward the rotation shaft 3 of the reduction gear 1. The cavity 8 can be sealed in the length direction of the rotating shaft 3 of the speed reducer 1 through the oil seal 21, the positioning effect of the outer edge of the oil seal 21 in the cavity is mainly relied on, and after oil stored in the cavity 8 is increased continuously, the sealing lip of the oil seal 21 is in contact with the surface of the rotating shaft 3 to form dynamic sealing. Wherein, the outer fringe of oil blanket 21 is in order to guarantee the static seal of oil blanket 21 in cavity 8 and the stability of the position of oil blanket 21, makes its assembly of being convenient for, and it adopts the structural style of rubber material parcel metal framework to with the outer fringe department design of oil blanket 21 by the chamfer, and still design on the outer fringe of oil blanket 21 and increase the adhesive force of oil blanket 21 by the slot, avoid oil blanket 21 to receive to produce after the oil pressure and retreat or crooked, also increased the fit tolerance of oil blanket 21, improved the reliability of the static seal of oil blanket 21. In addition, the oil seal 21, which has an outer edge designed as a metal outer frame, is suitable for secure mounting in the cavity 8 and precise mounting. When the grease in the cavity 8 is excessive and the excessive grease impacts the oil seal 21 to a certain extent, because the sealing lip of the oil seal 21 is made of an elastic material, the sealing lip of the oil seal 21 is offset toward the rotating shaft 3 of the speed reducer 1 after being acted by oil pressure until the sealing lip of the oil seal 21 abuts against the rotating shaft 3 of the speed reducer 1 and generates interference fit, so that dynamic sealing of the oil seal 21 is completed, and after the grease in the cavity 8 smoothly flows back into the oil storage tank of the speed reducer 1, the sealing lip of the oil seal 21, which is spread by the grease, returns to the initial state again, and in the initial state, the sealing lip of the oil seal 21 only abuts against the rotating shaft 3 of the speed reducer 1 and does not generate interference fit with the rotating shaft 3 of the speed reducer 1.

Specifically, seal assembly 2 still includes retaining ring 10 in the oil blanket, retaining ring 10 sets up in cavity 8 in the oil blanket, wherein, retaining ring 10 can set up in the oil blanket and be close to 1 end cover 7 one side of speed reducer, can set up and be close to 21 one side of oil blanket, through the setting of retaining ring 10 and oil blanket 21 baffle in the oil blanket, can limit oil blanket 21 in certain home range, this scope is no longer than the length of cavity 8, its home range mainly is the distance between retaining ring 10 to the 21 baffle of oil blanket in the oil blanket, in addition, the setting of retaining ring 10 not only can limit the home range of oil blanket 21 in the oil blanket, can also play certain hindrance effect to oozing of grease, when setting retaining ring 10 in the oil blanket is being close to end cover 7 department, retaining ring 10 can produce certain inhibitory action to the grease that end cover 7 department oozes in the oil blanket this moment, further reduce the interior grease of speed reducer 1 and spill over with this.

The utility model discloses an embodiment of speed reducer has used the utility model discloses the speed reducer sealing device of any embodiment, consequently also has above-mentioned advantage.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an implementation," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present disclosure, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims (10)

1. The utility model provides a speed reducer sealing device, characterized in that, includes seal assembly (2) and return line (5), seal assembly (2) sets up on end cover (7) of speed reducer (1), seal assembly (2) include oil blanket (21), fixing device (22) and seal baffle (23), seal baffle (23) are passed through fixing device (22) are installed on end cover (7), just seal baffle (23) with pass through between pivot (3) of speed reducer (1) oil blanket (21) are sealed, in order to pass through seal baffle (23) oil blanket (21) and pivot (3) of speed reducer (1) form cavity (8) jointly, cavity (8) with pass through between speed reducer (1) return line (5) are linked together, in order to pass through return line (5) backward flow the grease of oozing in speed reducer (1).

2. The sealing device of the speed reducer according to claim 1, further comprising an air outlet pipe (6), wherein the air outlet pipe (6) is communicated with the cavity (8), and a connecting end of the air outlet pipe (6) and the cavity (8) is arranged at the top of the cavity (8).

3. The sealing device of the speed reducer according to claim 2, further comprising a pressurizing device (9), wherein the pressurizing device (9) is communicated with the air outlet pipe (6), and the pressurizing device (9) is suitable for pressurizing the cavity (8) to drive the grease in the cavity (8) to flow back.

4. The sealing device of the speed reducer according to claim 1, wherein the end cover (7) is provided with a mounting hole (72) and a positioning hole (71) so that the mounting position of the sealing baffle (23) can be positioned through the positioning hole (71), and the end cover (7) is fixed at the oil outlet of the speed reducer (1) through the mounting hole (72) to form primary sealing.

5. The reducer sealing device according to any one of claims 1-4, wherein the reducer (1) and the connecting ends of the cavity (8) and the return line (5) are sealed by seals.

6. The reducer sealing device according to any one of claims 1 to 4, wherein a sealing ring is arranged at the joint of the end cover (7) and the rotating shaft (3).

7. The reducer sealing device according to any one of claims 1 to 4, wherein a filter screen (11) is provided at a connection of the return line (5) and the cavity (8).

8. The speed reducer sealing device according to any one of claims 1 to 4, wherein the sealing baffle (23) is a bent member.

9. The reducer sealing device according to claim 8, further comprising an oil seal inner retainer ring (10), wherein the oil seal inner retainer ring (10) is disposed in the cavity (8) so as to be able to limit displacement of the oil seal (21) towards the inside of the reducer (1) through the oil seal inner retainer ring (10).

10. A reducer comprising the reducer sealing device according to any one of claims 1 to 9.

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