CN219718002U - Motor shaft sealing structure - Google Patents

Abstract

The utility model relates to a motor shaft sealing structure which comprises a motor shaft body, wherein a shaft sleeve is sleeved on the motor shaft body, a plurality of through holes for leading out wires to pass through are formed in the shaft sleeve, and sealing sleeves which are in sealing fit with the inner walls of the through holes are sleeved on the leading out wires. According to the motor, the sealing sleeve on the outgoing line is matched with the first hole section of the through hole to form a first layer of seal, the sealant is filled into the third hole section of the through hole through the sealant filling hole, and the gap between the outgoing line and the third hole section is filled to form a second layer of seal, so that the waterproof and dustproof sealing effect between the motor shaft body and the shaft sleeve is guaranteed through the sealing structure, and the running reliability of the motor is improved.

Description

Motor shaft sealing structure

Technical Field

The utility model relates to the technical field of motor shaft sealing, in particular to a motor shaft sealing structure.

Background

The hub motor for the electric vehicle in the current market generally adopts a wire outlet mode that holes are formed in a motor shaft, and an outgoing wire penetrates out of a wire hole of the motor shaft. However, the wire outlet mode has the following problems that a thin wall phenomenon is generated after the motor shaft is perforated, so that the mechanical strength of the motor shaft is reduced. And the outgoing line needs to turn when passing out from the motor shaft wire hole, the outgoing line perforation degree of difficulty is great to make the outer insulating layer of outgoing line impaired easily, influence insulating strength.

Various improvements are made for the related art in the above, and some patents are also filed, for example, chinese patent with the publication number of CN201937429U discloses an outgoing line device of a brushless motor of an electric vehicle, which comprises a motor shaft, a bearing, a motor housing and an end cover, wherein a connected hub is arranged outside the motor housing, a stator and a rotor are arranged in the motor housing, a short shaft sleeve is sleeved on the outer wall of the motor shaft, a phase line outgoing line hole and a Hall signal outgoing line hole are formed in the short shaft sleeve, the phase line outgoing line of the motor passes through the phase line outgoing line hole, and the Hall signal outgoing line passes through the Hall signal outgoing line hole.

The inventor considers that the electric vehicle brushless motor of this kind of structure, motor phase lead wire pass the phase line wire hole, and hall signal lead wire passes hall signal wire hole, but has the clearance between the inside wall of motor phase lead wire and phase line wire hole, has the clearance between hall signal lead wire and the inside wall of hall signal wire hole, and this makes external water, mud, dust etc. easily enter into inside the motor through this clearance, leads to the motor to damage, therefore has certain improvement.

Disclosure of Invention

In order to improve the waterproof sealing effect, the utility model provides a motor shaft sealing structure.

The utility model provides a motor shaft sealing structure which adopts the following technical scheme:

the utility model provides a motor shaft seal structure, includes the motor shaft body, cup jointed the axle sleeve on the motor shaft body, be equipped with a plurality of through-holes that are used for supplying the lead-out wire to pass through on the axle sleeve, the cover is equipped with on the lead-out wire with through-hole inner wall sealing fit's seal cover.

Optionally, the through hole includes first hole section, second hole section and third hole section along its axial direction in proper order, and the lead-out wire passes first hole section, second hole section and third hole section respectively, the seal cover is located in the first hole section in order with the inner wall sealing fit of first hole section.

Optionally, the shaft sleeve is provided with a glue injection hole along a radial direction of the shaft sleeve, and the glue injection hole is used for communicating the outer surface of the shaft sleeve with the third hole section.

Optionally, a plurality of annular ribs are arranged on the outer wall of the sealing sleeve and are abutted with the inner wall of the first hole section, and the annular ribs are distributed along the axial direction of the sealing sleeve.

Optionally, the annular rib is obliquely arranged along the threading direction of the outgoing line.

Optionally, the outer surface of the sealing sleeve is provided with a tapered surface, the tapered surface extends from a middle position of the sealing sleeve to an end of the sealing sleeve, and the tapered surface of the sealing sleeve is used for being embedded into the second hole section.

Optionally, the motor shaft body is provided with a matching position for installing the shaft sleeve, the central position of the shaft sleeve is provided with a shaft hole for the motor shaft body to pass through, the matching position is provided with an annular groove, and an O-shaped ring matched with the inner wall of the shaft hole is installed in the annular groove.

Optionally, a plurality of through holes are disposed around the shaft hole.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. according to the motor, the sealing sleeve on the outgoing line is matched with the first hole section of the through hole to form a first layer of seal, the sealant is filled into the third hole section of the through hole through the sealant injection hole, and the gap between the outgoing line and the third hole section is filled to form a second layer of seal, so that the waterproof and dustproof sealing effect between the motor shaft body and the shaft sleeve is guaranteed by the sealing structure, and the running reliability of the motor is improved;

2. according to the utility model, the O-shaped ring on the motor shaft body is in sealing fit with the shaft hole of the shaft sleeve, so that the waterproof sealing effect of the shaft sleeve on the motor shaft body is further improved.

Drawings

Fig. 1 is a schematic structural view of a motor shaft sealing structure.

Fig. 2 is an exploded schematic view of a motor shaft sealing structure.

Fig. 3 is a schematic cross-sectional view of a sleeve.

Fig. 4 is a schematic cross-sectional view of a motor shaft body.

Reference numerals illustrate: 1. a motor shaft body; 2. a shaft sleeve; 3. a mating position; 4. a shaft hole; 5. a through hole; 51. a first bore section; 52. a second bore section; 53. a third bore section; 6. sealing sleeve; 7. annular rib; 8. a tapered surface; 9. a glue injection hole; 10. an annular groove; 11. an O-ring; 12. and (5) leading out wires.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-4.

The utility model provides a motor shaft seal structure, refers to fig. 1 and 2 and shows, includes motor shaft body 1 and axle sleeve 2, has the cooperation position 3 that is used for supplying axle sleeve 2 to install on the motor shaft body 1, and the central point of axle sleeve 2 puts and is equipped with the shaft hole 4 that is used for supplying motor shaft body 1 to pass, and axle sleeve 2 cup joints the cooperation position 3 of installing on motor shaft body 1 through shaft hole 4.

The shaft sleeve 2 is provided with a plurality of through holes 5 for leading-out wires 12 to pass through, the through holes 5 penetrate through two ends of the shaft sleeve 2 along the axial direction of the shaft sleeve 2, the plurality of through holes 5 are arranged around the shaft hole 4, and the leading-out wires 12 are sleeved with sealing sleeves 6 which are in sealing fit with the inner walls of the through holes 5. From this, form sealed cooperation through seal cover 6 and through-hole 5 inner wall to improve the waterproof dustproof sealed effect of axle sleeve 2 to, thereby avoid external dust and steam to enter into inside the motor from the gap between lead-out wire 12 and the through-hole 5, and then improve the operational reliability of motor.

Referring to fig. 3 and 4, the through hole 5 includes a first hole section 51, a second hole section 52 and a third hole section 53 in this order along the axial direction thereof, the lead-out wire 12 passes through the first hole section 51, the second hole section 52 and the third hole section 53, respectively, the first hole section 51 has a larger aperture than the second hole section 52, and the sealing sleeve 6 is located in the first hole section 51 to be in sealing engagement with the inner wall of the first hole section 51. Wherein, be provided with a plurality of annular bead 7 with first hole section 51 inner wall butt on the outer wall of seal cover 6, a plurality of annular bead 7 distribute along the axial direction of seal cover 6, annular bead 7 is followed lead-out wire 12 threading direction slope sets up to in the seal cover 6 gets into through-hole 5 of being convenient for. In one embodiment, the number of annular ribs 7 is three.

Wherein the outer surface of the sealing sleeve 6 is provided with a tapering surface 8, the tapering surface 8 extending from a middle position of the sealing sleeve 6 to an end of the sealing sleeve 6, the tapering surface 8 of the sealing sleeve 6 being intended for embedding into the second bore section 52. Through the structure setting of above-mentioned seal cover 6, the tapering face 8 of seal cover 6 can imbed in the second hole section 52, has improved the sealed effect between seal cover 6 and the second hole section 52, can improve the sealed effect between seal cover 6 and the first hole section 51 on the one hand through the setting of annular bead 7 to the annular bead 7 that the slope set up can improve the anticreep effect of seal cover 6 in the first hole section 51.

Referring to fig. 3 and 4, the third hole section 53 has a larger diameter than the second hole section 52, a filling gap is formed between the third hole section 53 and the outgoing line 12, the sleeve 2 is provided with a glue injection hole 9 along a radial direction thereof, and the glue injection hole 9 is used for communicating the outer surface of the sleeve 2 with the third hole section 53. It should be noted that the number of glue injection holes 9 on the sleeve 2 is the same as the number of through holes 5, i.e. each glue injection hole 9 communicates with the third hole section 53 of the corresponding through hole 5. The sealant can be injected into the filling gap between the third hole section 53 and the outgoing line 12 through the sealant injection hole 9 to seal.

Therefore, the sealing sleeve 6 on the outgoing line 12 is matched with the first hole section 51 of the through hole 5 to form a first layer of sealing, the sealant is filled into the third hole section 53 of the through hole 5 through the sealant filling hole 9, and the gap between the outgoing line 12 and the third hole section 53 is filled to form a second layer of sealing, and the sealing structure ensures the waterproof and dustproof sealing effect between the motor shaft body 1 and the shaft sleeve 2 and improves the running reliability of the motor.

Referring to fig. 1 and 4, an annular groove 10 is formed in a matching position 3 of a motor shaft body 1, an O-ring 11 is installed in the annular groove 10, and when a shaft sleeve 2 is sleeved and installed on the matching position 3 of the motor shaft body 1, the O-ring 11 is used for being matched with the inner wall of a shaft hole 4, so that the installation sealing effect between the shaft sleeve 2 and the motor shaft body 1 is improved.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. The utility model provides a motor shaft seal structure, includes motor shaft body (1), its characterized in that, cup joint axle sleeve (2) on motor shaft body (1), be equipped with on axle sleeve (2) and be used for supplying a plurality of through-holes (5) that lead-out wire (12) passed through, the cover is equipped with on lead-out wire (12) with through-hole (5) inner wall sealing fit's seal cover (6).

2. A motor shaft sealing structure according to claim 1, characterized in that the through hole (5) comprises a first hole section (51), a second hole section (52) and a third hole section (53) in sequence along the axial direction thereof, the outgoing line (12) passes through the first hole section (51), the second hole section (52) and the third hole section (53) respectively, and the sealing sleeve (6) is positioned in the first hole section (51) to be in sealing fit with the inner wall of the first hole section (51).

3. The motor shaft sealing structure according to claim 2, wherein the shaft sleeve (2) is provided with a glue injection hole (9) along a radial direction thereof, and the glue injection hole (9) is used for communicating an outer surface of the shaft sleeve (2) with the third hole section (53).

4. The motor shaft sealing structure according to claim 2, wherein a plurality of annular ribs (7) abutted against the inner wall of the first hole section (51) are arranged on the outer wall of the sealing sleeve (6), and the plurality of annular ribs (7) are distributed along the axial direction of the sealing sleeve (6).

5. The motor shaft seal structure according to claim 4, wherein the annular rib (7) is provided obliquely in the threading direction of the lead-out wire (12).

6. A motor shaft sealing arrangement according to claim 2, characterized in that the outer surface of the sealing sleeve (6) is provided with a tapering surface (8), which tapering surface (8) extends from a middle position of the sealing sleeve (6) to an end of the sealing sleeve (6), which tapering surface (8) of the sealing sleeve (6) is intended to be embedded in the second bore section (52).

7. The motor shaft sealing structure according to claim 1, wherein the motor shaft body (1) is provided with a matching position (3) for installing a shaft sleeve (2), a shaft hole (4) for allowing the motor shaft body (1) to pass through is arranged at the central position of the shaft sleeve (2), the matching position (3) is provided with an annular groove (10), and an O-shaped ring (11) matched with the inner wall of the shaft hole (4) is installed in the annular groove (10).

8. A motor shaft sealing structure according to claim 7, characterized in that a plurality of the through holes (5) are provided around the shaft hole (4).