CN220060463U - Oil supplementing pump sealing element of continuously variable transmission - Google Patents

Abstract

The utility model provides a continuously variable transmission oil supplementing pump sealing member, includes sealing seat, rotatory bearing seal and O shape circle, the bottom surface laminating of sealing seat is in the terminal surface of inner rotor, outer rotor and little casing, the top surface laminating of sealing seat is in the terminal surface of big casing to pack into sealing seat and little casing, the laminating department of big casing respectively with O shape circle, the inner circle coaxial of sealing seat is equipped with rotatory bearing seal, rotatory bearing seal cooperation sets up in the pivot, little casing, sealing seat and big casing all cooperate and are equipped with the pinhole, and fix in proper order with the locating pin. The utility model improves the baffle plate in the existing oil supplementing pump into the sealing seat, and the rotary oil seal is added in the gap between the sealing seat and the rotating shaft to isolate the oil suction port of the oil supplementing pump and the inner cavity of the shell, thereby solving the problem that the oil supplementing pump is affected by insufficient sealing property to smoothly input and output oil, and simultaneously preventing impurity particles in oil from being sucked together and preventing the oil from directly entering an internal system through the oil supplementing pump without filtering.

Description

Oil supplementing pump sealing element of continuously variable transmission

Technical Field

The utility model relates to the technical field of transmission oil supplementing pumps, in particular to a sealing element of a continuously variable transmission oil supplementing pump.

Background

At present, a hydrostatic drive device (HST) is commonly used for walking hydraulic pressure of an agricultural harvester, in the existing structure, an oil supplementing pump and a shell are not sealed and isolated by using an effective sealing piece, and an existing partition plate is insufficient in tightness due to the fact that gaps exist between the oil supplementing pump and a rotating shaft, oil is absorbed from an inner cavity of the shell in the use process, oil channeling is caused, the smooth oil inlet and outlet of the oil is affected, impurity particles in oil returning of the shell are sucked together, and adverse effects are caused on service lives of an inner rotor and an outer rotor of the oil supplementing pump.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a sealing member for a supplemental pump of a continuously variable transmission, so as to solve the problem that insufficient sealing performance affects smooth oil inlet and outlet of the supplemental pump.

The utility model is realized by the following technical scheme:

the utility model provides a continuously variable transmission oil supplementing pump sealing member, includes sealing seat, rotatory bearing seal and O shape circle, the bottom surface laminating of sealing seat is in the terminal surface of inner rotor, outer rotor and little casing, the top surface laminating of sealing seat is in the terminal surface of big casing to pack into sealing seat and little casing, the laminating department of big casing respectively with O shape circle, the inner circle coaxial of sealing seat is equipped with rotatory bearing seal, rotatory bearing seal cooperation sets up in the pivot, little casing, sealing seat and big casing all cooperate and are equipped with the pinhole, and fix in proper order with the locating pin.

Preferably, the sealing seat comprises a transverse cover plate and a concave table, a rotary shaft seal attached to the inner side wall is coaxially installed in the concave table, the bottom surface of the transverse cover plate is attached to the end surfaces of the inner rotor, the outer rotor and the small shell, the top surface of the transverse cover plate and the outer side wall of the concave table are attached to the end surface of the large shell, one end of the rotating shaft is provided with a third connecting portion, a second connecting portion and a first connecting portion from a bearing seat matched with the rotating shaft to the end of the rotating shaft, a flat key is arranged on the surface of the first connecting portion, the first connecting portion is inserted into the inner ring of the inner rotor and then is connected with the flat key, the surfaces of the second connecting portion and the third connecting portion are smooth, the inner ring of the transverse cover plate and the second connecting portion are in clearance fit, and the rotary shaft seal is matched with the third connecting portion.

Preferably, an O-shaped ring is matched between the rotary shaft seal and the transverse cover plate.

Preferably, a spring energy storage sealing ring is matched between the rotary shaft seal and the transverse cover plate.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model improves the baffle plate in the existing oil supplementing pump into the sealing seat, and the rotary oil seal is added in the gap between the sealing seat and the rotating shaft to isolate the oil suction port of the oil supplementing pump and the inner cavity of the shell, thereby solving the problem that the oil supplementing pump is affected by insufficient sealing property to smoothly input and output oil, and simultaneously preventing impurity particles in oil from being sucked together and preventing the oil from directly entering an internal system through the oil supplementing pump without filtering.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a seal for a supplemental pump of a continuously variable transmission of the present utility model;

FIG. 2 is an exploded view of the oil supplementing pump of the continuously variable transmission of the present utility model;

FIG. 3 is a schematic view of the connection between the seal holder, rotary shaft seal and the housing and shaft of the present utility model.

The oil-saving device comprises a small shell 1, an oil inlet 2, an inner rotor 3, an outer rotor 4, a rotating shaft 5, a first connecting part 501, a second connecting part 502, a third connecting part 503, a flat key 6, a sealing seat 7, a transverse cover plate 701, a concave table 702, a rotary shaft seal 8, a large shell 9, an O-shaped ring 10, an oil outlet 11 and a positioning pin 12.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Fig. 1-3 show a continuously variable transmission oil supplementing pump sealing member, which comprises a sealing seat 7, a rotary shaft seal 8 and an O-shaped ring 10, wherein the bottom surface of the sealing seat 7 is attached to the end surfaces of an inner rotor 3, an outer rotor 4 and a small shell 1, the top surface of the sealing seat 7 is attached to the end surface of a large shell 9, the O-shaped ring 10 is respectively arranged at the attachment positions of the sealing seat 7, the small shell 1 and the large shell 9, the O-shaped ring is used for isolating outside air and medium in a sealing cavity, and the end surface is kept to form a liquid film, so that the functions of sealing, balancing pressure and lubricating a section are achieved. The inner ring of the sealing seat 7 is coaxially provided with a rotary shaft seal 8, the rotary shaft seal 8 is matched with the rotary shaft 5, and the small shell 1, the sealing seat 7 and the large shell 9 are matched with pin holes and are sequentially fixed by positioning pins 12. Through increasing rotatory oil blanket 8 in the space between sealing seat 7 and pivot 5, keep apart oil pump oil suction port and casing inner chamber, solved the problem that the leakproofness is not enough and influence oil pump business turn over smoothly.

Specifically, as shown in fig. 3, the seal seat 7 includes a transverse cover plate 701 and a concave table 702, the concave table 702 is coaxially provided with a rotary shaft seal 8 attached to the inner side wall, the bottom surface of the transverse cover plate 701 is attached to the inner rotor 3, the outer rotor 4 and the end surface of the small housing 1, the top surface of the transverse cover plate 701 and the outer side wall of the concave table 702 are attached to the end surface of the large housing 9, one end of the rotating shaft 5 is sequentially provided with a third connecting portion 503, a second connecting portion 502 and a first connecting portion 501 from the position where the rotating shaft seal 5 is matched with the bearing seat to the end of the rotating shaft, the surface of the first connecting portion 501 is provided with a flat key 6, the flat key is connected with the inner ring of the inner rotor 3 after the flat key is inserted into the inner ring of the inner rotor, the surfaces of the second connecting portion 502 and the third connecting portion 503 are smooth, the inner ring of the transverse cover plate 701 and the second connecting portion 502 are in clearance fit, and the rotary shaft seal 8 is matched with the third connecting portion 503.

As an embodiment of the present utility model, an O-ring 10 may be provided between the rotary shaft seal 8 and the cross plate 701 in a mating manner, and the O-ring may provide a sealing effect.

As another embodiment of the present utility model, a spring energy storage sealing ring can be matched between the rotary shaft seal 8 and the transverse cover plate 701, and is installed in the corresponding groove, the spring is pressed to form outward tension force, the sealing lip is urged to cling to the sealing groove, and the spring permanently provides elastic force for the sealing lip, so that the abrasion of the sealing shell and the eccentricity of the matched parts can be compensated, and the sealing from vacuum to low pressure range can be formed. The system pressure also assists the spring to store energy, the greater the pressure, the more fully the sealing lip is attached to the groove, thereby forming a high pressure seal, and therefore being suitable for the situation of high pressure oil.

The working principle of the utility model is as follows: as shown in fig. 1, the rotating shaft 5 rotates to drive the inner rotor 3 and the outer rotor 4 to rotate correspondingly, so that the oil inlet 2 forms negative pressure to suck oil, the sealing seat 7 and the rotating shaft seal 8 seal the cavity between the rotating shaft 5 and the large shell 9, and the oil is smoothly extruded from the gap between the rotors to the oil outlet 11.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (4)

1. The utility model provides a continuously variable transmission oil compensating pump sealing member which characterized in that: including seal receptacle (7), rotatory bearing seal (8) and O shape circle (10), the bottom surface laminating of seal receptacle (7) is equipped with the pinhole in the terminal surface of inner rotor (3), outer rotor (4) and little casing (1), the top surface laminating of seal receptacle (7) is equipped with the laminating department of seal receptacle (7) and little casing (1), big casing (9) respectively with O shape circle (10), the inner circle coaxial of seal receptacle (7) is equipped with rotatory bearing seal (8), rotatory bearing seal (8) cooperation sets up in pivot (5), little casing (1), seal receptacle (7) and big casing (9) all cooperate and are equipped with the pinhole to fix in proper order with locating pin (12).

2. The continuously variable transmission supplemental pump seal according to claim 1, wherein: the sealing seat (7) comprises a transverse cover plate (701) and a concave table (702), a rotary shaft seal (8) attached to the inner side wall is coaxially arranged in the concave table (702), the bottom surface of the transverse cover plate (701) is attached to the end surfaces of the inner rotor (3), the outer rotor (4) and the small shell (1), the top surface of the transverse cover plate (701) and the outer side wall of the concave table (702) are attached to the end surface of the large shell (9), one end of the rotating shaft (5) is sequentially provided with a third connecting part (503), a second connecting part (502) and a first connecting part (501) from a bearing seat matched with the rotating shaft seal, the surface of the first connecting part (501) is provided with a flat key (6), the flat key is connected with the inner ring of the inner rotor (3), the surfaces of the second connecting part (502) and the third connecting part (503) are smooth, the inner ring of the transverse cover plate (701) and the second connecting part (502) are in clearance fit, and the rotary shaft seal (8) is matched with the third connecting part (503).

3. The continuously variable transmission supplemental pump seal according to claim 2, wherein: an O-shaped ring (10) is matched between the rotary shaft seal (8) and the transverse cover plate (701).

4. The continuously variable transmission supplemental pump seal according to claim 2, wherein: a spring energy storage sealing ring is matched between the rotary shaft seal (8) and the transverse cover plate (701).