CN220087043U - Driving shaft supporting structure and driving motor - Google Patents

Abstract

The utility model discloses a driving shaft supporting structure and a driving motor, wherein the driving shaft supporting structure comprises a base and a sliding sleeve, the base is provided with a mounting hole and an oil filling hole, and the oil filling hole is communicated with the mounting hole; the sliding sleeve comprises a sleeve part and a hollow hole penetrating through the sleeve part; the sleeve part is fixed in the mounting hole, the hollow hole is sleeved outside the driving shaft, the sleeve part is provided with at least one through hole, the inner wall of the hollow hole is provided with a first oil groove, and the through hole is communicated with the mounting hole and the first oil groove. Through above-mentioned scheme for drive shaft bearing structure has stronger anti electric corrosion ability, and can satisfy driving motor high-speed rotatory demand with lower cost.

Description

Driving shaft supporting structure and driving motor

Technical Field

The utility model relates to the technical field of electric automobiles, in particular to a driving shaft supporting structure and a driving motor.

Background

The existing electric automobile driving motor comprises a driving shaft and a rolling bearing arranged at the end part of the driving shaft, wherein an outer ring of the rolling bearing is assembled on a shell. The rolling bearing is used for bearing the rotation of the driving shaft, the working rotating speed of the driving motor of the current advanced electric automobile is up to 2-3 ten thousand rpm, and the current rolling bearing is difficult to meet the requirement.

Because the high temperature can be generated when the shaft voltage discharges, the bearing is easy to damage and can not work normally. Therefore, a shaft voltage lead-out structure is usually also connected between the drive shaft and the housing. The oil-cooled motor enables the shaft voltage guiding structure to work in an oil environment, which presents great challenges for reliability, and the shaft voltage guiding structure is an additional component, and has complex structure and high price.

Disclosure of Invention

The utility model mainly solves the technical problem of providing a driving shaft supporting structure and a driving motor, which have stronger electric corrosion resistance and can meet the requirement of high-speed rotation of the driving motor with lower cost.

In order to solve the technical problems, the utility model adopts a technical scheme that: the driving shaft supporting structure comprises a base and a sliding sleeve, wherein the base is provided with a mounting hole and an oil filling hole, and the oil filling hole is communicated with the mounting hole; the sliding sleeve comprises a sleeve part and a hollow hole penetrating through the sleeve part; the sleeve part is fixed in the mounting hole, the hollow hole is sleeved outside the driving shaft, the sleeve part is provided with at least one through hole, the inner wall of the hollow hole is provided with a first oil groove, and the through hole is communicated with the mounting hole and the first oil groove.

Preferably, the first oil groove comprises a first sub oil groove, and the first sub oil groove is arc-shaped; the through holes comprise first through holes, and the first through holes are communicated with the first sub-oil grooves.

Preferably, the first oil groove further comprises a second sub-oil groove, the second sub-oil groove is arc-shaped, and an included angle is formed between an extension path of the first sub-oil groove and an extension path of the second sub-oil groove; the through holes further comprise second through holes, the second through holes are communicated with the second sub-oil grooves, and coverage of the first oil grooves in the circumferential direction is improved.

Preferably, the first sub-oil groove and the second sub-oil groove are both in spiral structures, the spiral structures are coaxially arranged with the sliding sleeve, the first sub-oil groove and the second sub-oil groove are intersected on the inner wall, and the first through hole and the second through hole are overlapped at the intersection position.

Preferably, the first through hole and the second through hole each comprise a first hole section connected with the first oil groove and a second hole section connected with the mounting hole, wherein the inner diameter of the first hole section is smaller than that of the second hole section, and the second hole section is a trapezoid hole.

Preferably, the inner wall of mounting hole is equipped with holds the oil groove, hold the oil groove and encircle the mounting hole, the oil filler point with the through-hole all with Rong Youcao intercommunication, there is not the assembly requirement in circumference to sliding sleeve and base, and oil gets into earlier in holding the oil groove from the oil filler point, and then gets into in the sliding sleeve through the through-hole. And the oil containing groove can play a certain role in oil storage, can continuously supply oil for the sliding sleeve for a long time, and ensures the reliability of the sliding sleeve.

Preferably, the distance between the first oil groove end and the opposite end surfaces of the sleeve part is greater than 0. The first oil groove does not penetrate through the sliding sleeve in the axial direction, a closed cavity is formed between the first oil groove and the outer wall of the driving shaft, so that oil can form certain oil pressure in the closed cavity, the driving shaft is suspended in the hollow hole, the friction force between the driving shaft and the sliding sleeve is reduced, and the loss is reduced.

Preferably, the sliding sleeve further comprises a flange end portion, the flange end portion is connected with one end of the sleeve portion, a second oil groove is formed in the end face, away from the sleeve portion, of the flange end portion, the second oil groove extends to be communicated with the hollow hole, and the second oil groove is used for guiding oil between the flange end portion and the driving shaft, and lubricating and cooling the area.

Preferably, the through hole penetrates through the sleeve part, a first opening is formed in the inner wall of the sleeve part, a second opening is formed in the outer wall of the sleeve part, the first opening is located in the first oil groove, and the second opening is located in the oil containing groove.

In order to solve the technical problems, the utility model adopts another technical scheme that: there is provided a drive motor comprising a drive shaft and a drive shaft support structure as described in any of the embodiments.

The beneficial effects of the utility model are as follows: compared with the prior art, the driving shaft supporting structure and the driving motor are provided with the sliding sleeve and the base for supporting the driving shaft, wherein the sliding sleeve is sleeved at the end part of the driving shaft, high temperature is not easy to generate when the voltage of the driving shaft discharges due to the fact that the sliding sleeve is in surface contact with the driving shaft, and even if part of points of the sliding sleeve are damaged due to discharge, other positions of the inner wall of the sliding sleeve can still support the driving shaft to continuously rotate at high speed, so that the driving shaft has strong electric corrosion resistance. The base forms an oil way with the oil injection hole on the base, the through hole on the sliding sleeve and the first oil groove when the sliding sleeve is fixed, so that oil is introduced between the sliding sleeve and the driving shaft from the outside, the effects of lubrication and cooling are achieved, and the high-speed rotation requirement of the driving shaft is met. The utility model has simple structure, does not need to additionally arrange a shaft voltage leading-out structure, and reduces the cost.

Drawings

FIG. 1 is a schematic view of an embodiment of a drive shaft support structure of the present utility model;

FIG. 2 is a schematic view of a base according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an embodiment of a sliding sleeve according to the present utility model;

FIG. 4 is a schematic view of another embodiment of a sliding sleeve of the present utility model;

FIG. 5 is a schematic view of another embodiment of a sliding sleeve of the present utility model;

fig. 6 is a cross-sectional view of another embodiment of the sliding sleeve of the present utility model.

Detailed Description

In order to make the objects, technical solutions and effects of the present utility model clearer and more specific, the present utility model will be described in further detail below with reference to the accompanying drawings and examples. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a supporting structure for a driving shaft according to the present utility model. The drive shaft support structure includes a sliding sleeve 100 and a base 200. Fig. 2 is a schematic structural view of an embodiment of the base of the present utility model, as shown in fig. 2. The base 200 is provided with a mounting hole 200a and an oil filler hole 201, and the oil filler hole 201 communicates with the mounting hole 200 a. Fig. 3 is a schematic structural view of an embodiment of the sliding sleeve according to the present utility model, as shown in fig. 3. The sliding sleeve 100 includes a sleeve portion 104 and a hollow hole 104a penetrating the sleeve portion 104; as shown in fig. 1, the sleeve portion 104 is fixed in the mounting hole 200a, the hollow hole 104a is sleeved outside the driving shaft 300, as shown in fig. 3, the sleeve portion 104 is provided with at least one through hole 102, the inner wall of the hollow hole 104a is provided with a first oil groove 101, and the through hole 102 is communicated with the mounting hole 200a and the first oil groove 101.

The utility model is provided with the sliding sleeve 100 and the base 200 for supporting the driving shaft, wherein the sliding sleeve 100 is sleeved at the end part of the driving shaft 300, the driving shaft 300 rotates in the hollow hole 104a, the inner wall of the sleeve part 104 of the sliding sleeve 100 is in surface contact with the outer peripheral surface of the end part of the driving shaft 300, high temperature is not easy to generate when the shaft voltage discharges due to larger contact range, and even if part of the sliding sleeve 100 is damaged due to discharge, other positions of the inner wall of the sleeve part 104 can still support the driving shaft 300 to continuously rotate at high speed, so that the electric corrosion resistance is higher. While the base 200 fixes the sliding sleeve 100, the oil filling hole 201 on the base and the through hole 102 and the first oil groove 101 on the sliding sleeve 100 form an oil path, so that oil is led to the inner wall of the sleeve part 104, and along with the rotation of the driving shaft 300, the oil is brought between the sliding sleeve 100 and the driving shaft 300, thereby achieving the effects of lubrication and cooling and meeting the high-speed rotation requirement of the driving shaft 300. The utility model has simple structure, does not need to additionally arrange a shaft voltage leading-out structure, and reduces the cost.

Optionally, with continued reference to fig. 2, the inner wall of the mounting hole 200a is provided with an oil receiving groove 202, rong Youcao 202 surrounds the mounting hole 200a, and the oil filling hole 201 and the through hole are both in communication with Rong Youcao. Since the oil receiving groove 202 is provided along the circumferential direction, there is no requirement for assembling the sliding sleeve 100 and the base 200 in the circumferential direction, and oil enters the oil receiving groove 202 from the oil filling hole 201 and then enters the sliding sleeve 100 through the through hole 102. And the oil containing groove 202 can play a certain role in oil storage, can continuously supply oil for the sliding sleeve 100 for a long time, and ensures the reliability of the sliding sleeve 100.

Optionally, with continued reference to fig. 3, the sliding sleeve 100 further includes a flange end 105, where the flange end 105 is connected to one end of the sleeve portion 104, and an end surface of the flange end 105 away from the sleeve portion 104 is provided with a second oil groove 103, where the second oil groove 103 extends to communicate with the hollow hole 104 a. Referring to fig. 1, the flange end 105 serves to axially limit the driving shaft 300, and the second oil groove 103 serves to guide oil between the flange end 105 and the driving shaft 300, to lubricate and cool this region. Specifically, the second oil grooves 103 extend radially along the sliding sleeve 100, and the plurality of second oil grooves 103 may be uniformly distributed on the outer end surface of the flange end 105 in the circumferential direction.

Alternatively, with continued reference to fig. 3, in the present embodiment, the first oil groove 101 includes a first sub-oil groove 1011 and a second sub-oil groove 1012, and the first sub-oil groove 1011 and the second sub-oil groove 1012 are each arc-shaped; the through-holes 102 include a first through-hole 1021 and a second through-hole 1022, the first through-hole 1021 being in communication with the first sub-oil groove 1011, and the second through-hole 1022 being in communication with the second sub-oil groove 1012. In the present embodiment, the first sub-oil groove 1011 and the second sub-oil groove 1012 are centrally symmetric along the central axis of the sliding sleeve 100, so that the oil introduced by the first through hole 1021 and the second through hole 1022 can be uniformly distributed on the inner wall of the hollow hole 104 a. Preferably, the orthographic projections of the first sub-oil groove 1011 and the second sub-oil groove 1012 in the axial direction are formed in a ring shape, that is, the first sub-oil groove 1011 and the second sub-oil groove 1012 circumferentially cover the hollow hole 104a so that the oil can entirely cover between the hollow hole 104a and the drive shaft 300 in the circumferential direction. In the present embodiment, the first sub-oil groove 1011 and the second sub-oil groove 1012 are parallel. Further, the orthographic projections of the first sub-oil groove 1011 and the second sub-oil groove 1012 in the axial direction are semi-circles connected end to end, that is, there is no gap between the orthographic projections of the first sub-oil groove 1011 and the second sub-oil groove 1012, and they are not overlapped with each other, so that the occupation ratio of the first oil groove 101 on the inner wall of the hollow hole 104a is reduced to the minimum on the premise of meeting the circumferential coverage, and the enough contact area between the sliding sleeve 100 and the driving shaft 300 is ensured, thereby ensuring the enough electric corrosion resistance. In other embodiments, the first oil groove 101 may include three or more sub-oil grooves, and a plurality of sub-oil grooves may be uniformly distributed in the axial direction.

Alternatively, referring to fig. 4, fig. 4 is a schematic structural view of another embodiment of the sliding sleeve of the present utility model. In the present embodiment, an angle is formed between the extending path of the first sub-oil groove 1011 and the extending path of the second sub-oil groove 1012. That is, the extension lines of the first sub-oil grooves 1011 and the extension lines of the second sub-oil grooves 1012 intersect, and thus the oil guide function can be achieved when the drive shaft (not shown) rotates forward and backward, respectively, due to the fact that the extension directions of the two are not identical. For example, when the drive shaft of the drive motor rotates in the forward direction, the drive shaft rotates in the forward direction with the oil distributed on the outer peripheral surface of the drive shaft along the extending path of the first sub-oil groove 1011; when the drive shaft is reversed, the drive shaft is reversed with the oil distributed along the extending path of the second sub-oil groove 1012 on the outer peripheral surface of the drive shaft.

Alternatively, referring to fig. 5, fig. 5 is a schematic structural view of another embodiment of the sliding sleeve of the present utility model. In the present embodiment, the first sub-oil groove 1011 and the second sub-oil groove 1012 intersect, and the first through-hole 1021 and the second through-hole 1022 coincide at the intersection position. Because the extending directions of the two are inconsistent, the oil guide function can be respectively realized when the driving shaft (not shown) rotates forwards and reversely. And since the first through hole 1021 and the second through hole 1022 overlap as one through hole, oil can be simultaneously introduced into the two sub-oil grooves through one through hole.

Referring to fig. 6, fig. 6 is a cross-sectional view of another embodiment of the sliding sleeve of the present utility model. In the present embodiment, the first sub-oil groove 1011 and the second sub-oil groove 1012 intersect, the first sub-oil groove 1011 and the second sub-oil groove 1012 are respectively provided with two, and the intersection position of each group of the first sub-oil groove 1011 and the second sub-oil groove 1012 is provided with the through hole 102. In this embodiment, the through hole 102 includes a first hole section 102a connected to the first oil groove 101 and a second hole section 102b connected to the mounting hole 200a, wherein the inner diameter of the first hole section 102a is smaller than the inner diameter of the second hole section 102b, and the second hole section 102b is a trapezoid hole. The second hole segment 102b is larger in opening, so that oil in the base can be sufficiently introduced into the first oil groove 101, and the probability of oil overflowing between the sliding sleeve 100 and the base is reduced. Specifically, the through hole 102 penetrates the sleeve portion 104 and forms a first opening (not shown) 102c in an inner wall of the sleeve portion 104, and forms a second opening 102d in an outer wall of the sleeve portion, the first opening 102c being located in the first oil groove 101, the second opening 102d being located in the oil receiving groove, the second opening 102d being larger than the first opening 102c.

Alternatively, with continued reference to fig. 6, the distance b between the end of the first oil groove 101 and the opposite end surfaces of the sleeve portion 104 is greater than 0. For example, the distance b between the end surface of the first sub oil groove 1011 away from the flange end 105 and the end surface of the sleeve portion 104 away from the flange end 105, the distance b between the end surface of the second sub oil groove 1012 close to the flange end 105 and the end surface of the flange end 105, and b may be 1mm, 2mm, or the like. Since the first oil groove 101 does not penetrate the sliding sleeve 100 in the axial direction, a closed cavity is formed between the first oil groove 101 and the outer wall of the driving shaft 300, so that oil can form a certain oil pressure in the closed cavity, and the driving shaft is suspended in the hollow hole 104a, thereby reducing friction force between the driving shaft and the sliding sleeve 100 and reducing loss. In other embodiments, the distance b between the end of the first oil groove 101 and the opposite end surfaces of the sleeve portion 104 may be equal to 0, i.e., the distance b penetrates the sliding sleeve 100 in the axial direction.

Optionally, in other embodiments, the first sub-oil groove 1011 and the second sub-oil groove 1012 are both in a spiral structure, the spiral structure is coaxially disposed with the sliding sleeve 100, the first sub-oil groove 1011 and the second sub-oil groove 1012 intersect on the inner wall, and the first through hole 1021 and the second through hole 1022 coincide at the intersection position. When the length of the sliding sleeve 100 in the axial direction is longer, the first sub-oil groove 1011 and the second sub-oil groove 1012 may have a spiral structure along the inner wall of the hollow hole 104a, so that the first sub-oil groove 1011 and the second sub-oil groove 1012 may form a plurality of intersecting points on the inner wall, each intersecting point may be provided with a through hole 102, corresponding to through holes with different axial positions, and may also be provided with a plurality of oil accommodating grooves 202, corresponding to the base 200, so that each position between the sliding sleeve 100 and the driving shaft 300 in the axial direction is sufficiently lubricated. In other embodiments, only one spiral first oil groove 101 may be provided. In other embodiments, the first oil groove 101 may have other arc shapes such as a wave shape.

As shown in fig. 1, the present utility model also provides a drive motor including a drive rotor 400, a drive shaft 300, and a drive shaft support structure in any of the embodiments. The driving rotor 400 is fixedly arranged outside the driving shaft 300, and the driving rotor 400 drives the driving shaft 300 to rotate in the driving shaft supporting structure under the action of magnetic force.

Because the sliding sleeve 100 is in surface contact with the driving shaft 300, high temperature is not easy to generate when the shaft voltage discharges, and even if part of the position of the sliding sleeve 100 is damaged by discharge, other positions of the inner wall of the sliding sleeve 100 can still support the driving shaft 300 to continue rotating at high speed, so that the sliding sleeve has strong electric corrosion resistance. While the base 200 fixes the sliding sleeve 100, the oil injection hole 201 on the base, the through hole 102 on the sliding sleeve 100 and the first oil groove 101 form an oil path, so that oil is introduced between the sliding sleeve 100 and the driving shaft 300 from the outside, the effects of lubrication and cooling are achieved, and the high-speed rotation requirement of the driving shaft 300 is met. The utility model has simple structure, does not need to additionally arrange a shaft voltage leading-out structure, and reduces the cost.

The foregoing is only the embodiments of the present utility model, and therefore, the patent scope of the utility model is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the utility model.

Claims (10)

1. A drive shaft support structure for supporting a drive shaft, comprising:

the base is provided with a mounting hole and an oil filling hole, and the oil filling hole is communicated with the mounting hole;

the sliding sleeve comprises a sleeve part and a hollow hole penetrating through the sleeve part; the sleeve part is fixed in the mounting hole, the hollow hole is sleeved outside the driving shaft, the sleeve part is provided with at least one through hole, the inner wall of the hollow hole is provided with a first oil groove, and the through hole is communicated with the mounting hole and the first oil groove.

2. The drive shaft support structure of claim 1, wherein the drive shaft support structure is configured to support the drive shaft,

the first oil groove comprises a first sub-oil groove which is arc-shaped;

the through holes comprise first through holes, and the first through holes are communicated with the first sub-oil grooves.

3. The drive shaft support structure of claim 2, wherein,

the first oil groove further comprises a second sub-oil groove, the second sub-oil groove is arc-shaped, and an included angle is formed between the extending path of the first sub-oil groove and the extending path of the second sub-oil groove;

the through holes further comprise second through holes, and the second through holes are communicated with the second sub-oil grooves.

4. The drive shaft support structure of claim 3, wherein,

the first sub-oil grooves and the second sub-oil grooves are of spiral structures, the spiral structures are coaxially arranged with the sliding sleeve, the first sub-oil grooves and the second sub-oil grooves are intersected on the inner wall, and the first through holes are overlapped with the second through holes at the intersection positions.

5. The drive shaft support structure of claim 3, wherein the first through hole and the second through hole each comprise a first hole section connected to the first oil groove and a second hole section connected to the mounting hole, wherein an inner diameter of the first hole section is smaller than an inner diameter of the second hole section, and the second hole section is a trapezoidal hole.

6. The drive shaft support structure according to claim 1, wherein an inner wall of the mounting hole is provided with an oil receiving groove surrounding the mounting hole, and the oil filling hole and the through hole are both communicated with the oil receiving groove.

7. The drive shaft support structure according to any one of claims 1-6, wherein,

the distance between the end part of the first oil groove and the two opposite end surfaces of the sleeve part is larger than 0.

8. The drive shaft support structure of claim 7, wherein the drive shaft support structure is configured to support the drive shaft,

the sliding sleeve further comprises a flange end portion, the flange end portion is connected with one end of the sleeve portion, a second oil groove is formed in the end face, away from the sleeve portion, of the flange end portion, and the second oil groove extends to be communicated with the hollow hole.

9. The drive shaft support structure of claim 6, wherein the drive shaft support structure is configured to support the drive shaft,

the through hole penetrates through the sleeve part, a first opening is formed in the inner wall of the sleeve part, a second opening is formed in the outer wall of the sleeve part, the first opening is located in the first oil groove, and the second opening is located in the oil containing groove.

10. A driving motor is characterized in that,

comprising a drive shaft and a drive shaft support structure according to any of claims 1-9.