CN210160225U

CN210160225U - Enhanced spindle structure

Info

Publication number: CN210160225U
Application number: CN201920495032.1U
Authority: CN
Inventors: 刘中平; 梁海金
Original assignee: Jiangxi Dingli Spinning Equipment Co ltd
Current assignee: Jiangxi Dingli Spinning Equipment Co ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-03-20
Anticipated expiration: 2029-04-12

Abstract

The utility model discloses an enhanced spindle structure, which comprises a spindle body, a shell, a front end cover, a rear end cover, a first aligning roller bearing, a second aligning roller bearing, a first thrust roller bearing and a second thrust roller bearing; the spindle body is reasonably provided with a first step part, a second step part, a third step part, a fourth step part and a fifth step part, and the spindle body is matched with a first self-aligning roller bearing, a second self-aligning roller bearing, a first thrust roller bearing and a second thrust roller bearing, wherein the first self-aligning roller bearing and the second self-aligning roller bearing can bear radial load and axial load with bidirectional effect, the first thrust roller bearing and the second thrust roller bearing can bear axial and radial combined load mainly comprising axial load, the friction factor is lower, the rotating speed of the processing spindle is effectively improved, the processing efficiency is high, the spindle body has a self-aligning effect, the processing precision is effectively improved, the bearing capacity of the whole spindle structure is increased, the spindle body can bear 60T stress in the axial and radial directions, in addition, a cooling pipeline is arranged, the spindle body can be effectively cooled, the spindle body can work for.

Description

Enhanced spindle structure

Technical Field

The utility model relates to a main shaft technical field, concretely relates to use enhancement mode main shaft structure in spinning-lathe.

Background

Spin forming is a processing method of spin forming a metal plate along the shape of the outer periphery of a forming die by using a spin pressing mechanism, and can be applied to processing metal products taking an axis as a symmetrical processing center, such as kitchenware products like a kettle, a pot and a bowl, electrical parts like a lampshade and a loudspeaker part, automobile parts like a wheel and a wheel cover, and various products like a tank, a container and a cover.

The motion precision and the structural rigidity of a main shaft component of the existing numerical control spinning machine are important factors for determining the processing quality and the cutting efficiency. The indexes for measuring the performance of the main shaft part mainly comprise rotation precision and load strength, namely radial and axial runout in the direction of processing precision when the main shaft rotates under load, and some existing main shaft structures adopt a deep groove ball bearing arrangement structure. When the double deep groove ball bearing is used, the double deep groove ball bearing is easy to damage due to more axial force, and the service life is short; some employ oil-impregnated bearing structures. When the oil-retaining bearing is used, the friction force is increased due to axial stress, and the processing efficiency is influenced; and the load capacity is poor, and the application range is small.

SUMMERY OF THE UTILITY MODEL

To the above, an object of the utility model is to provide an enhancement mode main shaft structure that structural design is ingenious, reasonable, and load capacity is big and job stabilization nature is good.

In order to achieve the above purpose, the utility model provides a technical scheme is: an enhanced spindle structure comprises a spindle body, a shell, a front end cover, a rear end cover, a first self-aligning roller bearing, a second self-aligning roller bearing, a first thrust roller bearing and a second thrust roller bearing, wherein the spindle body is reduced in a step shape from front to back to form a first step part, a second step part, a third step part, a fourth step part and a fifth step part in sequence, an annular bulge is arranged in the middle of an inner cavity of the shell, the spindle body is arranged on the inner cavity of the shell through the first self-aligning roller bearing, the second self-aligning roller bearing, the first thrust roller bearing and the second thrust roller bearing, the first self-aligning roller bearing and the first thrust roller bearing are sequentially sleeved on the third step part, a jacking inner ring of the first thrust roller bearing is pressed on the inner ring of the first self-aligning roller bearing, an outer ring of the first thrust roller bearing is pressed on the side wall of the annular bulge, the second thrust roller bearing and the second self-aligning roller bearing are sequentially sleeved on a fourth step part, the outer ring of the second thrust roller bearing is pressed against the other side wall of the annular protrusion, the inner ring of the second thrust roller bearing is pressed against the inner ring of the second self-aligning roller bearing, the front end cover and the rear end cover are correspondingly covered at two ends of the shell, the first step part and the second step part of the spindle body penetrate through the front end cover to extend out, a first rotary sealing ring is arranged between the second step part and the front end cover, and a fifth step part of the spindle body extends into the rear end cover and is provided with a second rotary sealing ring.

As an improvement of the present invention, one side of the inner ring of the first thrust roller bearing is pressed against the second step portion, and the other side is pressed against the inner ring of the first aligning roller bearing through the first snare.

As an improvement of the utility model, the one end position that fourth step portion is close to fifth step portion is equipped with the nut, second thrust roller bearing's outer lane roof pressure is in on another lateral wall of annular bulge, this second thrust roller bearing's inner circle is in through second snare roof pressure on second self-aligning roller bearing's inner circle one side, this second self-aligning roller bearing's inner circle opposite side is through third snare roof pressure on the nut.

As an improvement of the utility model, the terminal surface central point of first step portion puts and is equipped with the toper boss, and the inclined plane angle of this toper boss is 7 ~ 9 degrees.

As an improvement of the present invention, the end face peripheral position of the first step portion is provided with a plurality of screw holes in a circle-symmetrical manner.

As an improvement of the present invention, the first thrust roller bearing and the second thrust roller bearing are oriented in opposite directions.

As an improvement of the present invention, the outer wall of the housing is partially and radially protruded to form a thickened portion, and a cooling pipeline is provided in the thickened portion.

As an improvement of the present invention, an assembly cavity for installing the overrunning clutch is provided at the center of the end face of the fifth step portion, and an opening corresponding to the assembly cavity is provided on the rear end cap.

As an improvement of the utility model, the radial increase of the inboard one end of open-ended form with the concave position of fifth step portion appearance profile looks adaptation, the rotatory sealing washer of second is located this concave position.

As an improvement of the utility model, first self-aligning roller bearing's model is 22226E, second self-aligning roller bearing's model is 22224E, first thrust roller bearing's model is 29326E, second thrust roller bearing's model is 29324E.

As an improvement of the utility model, be equipped with the mounting hole on cross roller bearing's the outer lane, the screw passes backshell and flexbile gear in proper order and twists this mounting hole.

The utility model has the advantages that: the utility model discloses structural design is ingenious, rationally be equipped with first step portion, second step portion, third step portion, fourth step portion and fifth step portion on the main shaft body, and through with first self-aligning roller bearing, second self-aligning roller bearing, first thrust roller bearing and second thrust roller bearing cooperate, first, second self-aligning roller bearing can bear radial load outside, can also bear the axial load of two-way effect, and be equipped with first, second thrust roller bearing additional, can bear the axle that axial load is the owner, radial combined load, friction factor is lower, effectively improve processing main shaft rotational speed, machining efficiency is high, and have the aligning effect, effectively promote the machining precision, and increased the bearing capacity of whole main shaft structure, increase of service life; the first rotary sealing ring and the second rotary sealing ring are arranged, the sealing effect is good, foreign matters are prevented from entering the main shaft structure, the working stability is ensured, and in addition, the cooling pipeline is arranged, so that the main shaft body can be effectively cooled, the main shaft can work for a long time, and the service life of the main shaft is prolonged.

The present invention will be further explained with reference to the drawings and the embodiments.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the spindle body of the present invention.

Fig. 3 is a schematic structural diagram of the middle housing of the present invention.

Fig. 4 is a schematic structural diagram of the middle rear end cover of the present invention.

Detailed Description

Referring to fig. 1 to 4, the enhanced spindle structure provided in this embodiment includes a spindle body 1, a housing 2, a front end cover 3, a rear end cover 4, a first self-aligning roller bearing 5, a second self-aligning roller bearing 6, a first thrust roller bearing 7, and a second thrust roller bearing 8.

In this embodiment, the first self-aligning roller bearing 5 is preferably a self-aligning roller bearing of type 22226E, the second self-aligning roller bearing 6 is preferably a self-aligning roller bearing of type 22224E, and the first thrust roller bearing 7 is preferably a thrust roller bearing of type 29326E. The second thrust roller bearing 8 is preferably a thrust roller bearing of type 29324E. In other embodiments, the self-aligning roller bearing and the thrust roller bearing of the corresponding model can be selected according to the size of the main shaft structure and the required bearing pressure.

Referring to fig. 1 and 2, the spindle body 1 is reduced from front to back in a stepped manner to form a first step portion 11, a second step portion 12, a third step portion 13, a fourth step portion 14 and a fifth step portion 15 in sequence.

A fitting cavity 16 is provided at the center of the end face of the fifth stepped portion 15, and an opening 41 corresponding to the fitting cavity 16 is provided in the rear end cover 4. The assembly cavity 16 can be used for installing an overrunning clutch, and convenience is brought to installation and use.

The end face center position of first step portion 11 is equipped with toper boss 17, and the inclined plane angle an of this toper boss 17 is 7 ~ 9 degrees, and preferred 8 degrees can be assembled with the centre hole of pinch roller fast, and has the aligning effect, effectively promotes the assembly precision. A plurality of screw holes 18 are symmetrically arranged at the periphery of the end face of the first step part 11. The conical boss 17 can be well matched with the pinch roller, a screw penetrates through a mounting hole in the pinch roller and is screwed into the screw hole 18, the purpose of fixing the pinch roller on the main shaft body 1 is achieved, and the assembly is simple and convenient.

Referring to fig. 1 and 3, an annular protrusion 21 is disposed in a middle position of an inner cavity of the housing 2, and the spindle body 1 is disposed in the inner cavity of the housing 2 through the first self-aligning roller bearing 5, the second self-aligning roller bearing 6, the first thrust roller bearing 7 and the second thrust roller bearing 8, preferably, the first thrust roller bearing 7 and the second thrust roller bearing 8 are opposite in orientation and can bear axial loads acting in two directions.

The first self-aligning roller bearing 5 and the first thrust roller bearing 7 are sequentially sleeved on the third step part 13, an inner ring of the first thrust roller bearing 7 is pressed on the inner ring of the first self-aligning roller bearing 5, specifically, one side of the inner ring of the first thrust roller bearing 7 is pressed on the second step part 12, and the other side of the inner ring of the first thrust roller bearing 5 is pressed on the inner ring of the first self-aligning roller bearing 5 through the first snare 91. The outer ring of the first thrust roller bearing 7 presses against the side wall of the annular projection 21.

The second thrust roller bearing 8 and the second self-aligning roller bearing 6 are sequentially sleeved on the fourth step portion 14, an outer ring of the second thrust roller bearing 8 is pressed against the other side wall of the annular protrusion 21, an inner ring of the second thrust roller bearing 8 is pressed against an inner ring of the second self-aligning roller bearing 6, specifically, a nut 92 is arranged at one end of the fourth step portion 14 close to the fifth step portion 15, an outer ring of the second thrust roller bearing 8 is pressed against the other side wall of the annular protrusion 21, an inner ring of the second thrust roller bearing 8 is pressed against one side of the inner ring of the second self-aligning roller bearing 6 through a second ring sleeve 93, and the other side of the inner ring of the second self-aligning roller bearing 6 is pressed against the nut 92 through a third ring sleeve 94.

The front end cover 3 and the rear end cover 4 are correspondingly covered at two ends of the shell 2, the first step portion 11 and the second step portion 12 of the main shaft body 1 penetrate through the front end cover 3 to extend out, a first rotary sealing ring 95 is arranged between the second step portion 12 and the front end cover 3, the fifth step portion 15 of the main shaft body 1 extends into the rear end cover 4, and a second rotary sealing ring 96 is arranged between the fifth step portion 15 and the rear end cover 4. Specifically, one end of the inner side of the opening 41 is radially enlarged to form a concave position 42 matched with the outline of the fifth step part 15, and the second rotary sealing ring 96 is positioned on the concave position 42. The first rotary sealing ring 95 and the second rotary sealing ring 96 are additionally arranged, the sealing effect is good, foreign matters are effectively prevented from entering the main shaft structure, the working stability is ensured,

in order to improve the heat dissipation effect of the spindle, a thickened portion 22 is formed on the outer wall of the housing 2 in a local radial protruding manner, and a cooling pipeline 23 is arranged in the thickened portion 22. The cooling pipeline 23 is connected with cooling oil, and can effectively cool the main shaft body 1, so that the main shaft body can work for a long time, and the service life of the main shaft is prolonged.

During operation, cooperate with the main shaft body 1 through first thrust roller bearing 7, second thrust roller bearing 8, first self-aligning roller bearing 5, second self-aligning roller bearing 6, wherein outside first self-aligning roller bearing 5 and the second self-aligning roller bearing 6 can bear radial load, can also bear the axial load of two-way effect, first thrust roller bearing 7 and second thrust roller bearing 8 can bear axle, radial combined load that axial load is main, and friction factor is lower, effectively improves processing main shaft rotational speed, and machining efficiency is high to have the aligning effect, effectively promote the machining precision, increased the bearing capacity of whole main shaft structure moreover, can bear 60T's atress respectively in axial direction, application scope is wide.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used in the present specification, these terms are only used for convenience of description and do not limit the present invention, and the spindle structure having other structures the same as or similar to the spindle structure is within the protection scope of the present invention.

Claims

1. An enhanced spindle structure comprises a spindle body, a shell, a front end cover and a rear end cover, and is characterized by further comprising a first self-aligning roller bearing, a second self-aligning roller bearing, a first thrust roller bearing and a second thrust roller bearing, wherein the spindle body is reduced in a step shape from front to back to form a first step part, a second step part, a third step part, a fourth step part and a fifth step part in sequence, an annular bulge is arranged in the middle of an inner cavity of the shell, the spindle body is arranged on the inner cavity of the shell through the first self-aligning roller bearing, the second self-aligning roller bearing, the first thrust roller bearing and the second thrust roller bearing, the first self-aligning roller bearing and the first thrust roller bearing are sequentially sleeved on the third step part, and an inner ring of the first thrust roller bearing is pressed on the inner ring of the first self-aligning roller bearing, the outer ring of the first thrust roller bearing is pressed against the annular convex side wall, the second thrust roller bearing and the second self-aligning roller bearing are sequentially sleeved on the fourth step portion, the outer ring of the second thrust roller bearing is pressed against the other annular convex side wall, the inner ring of the second thrust roller bearing is pressed against the inner ring of the second self-aligning roller bearing, the front end cover and the rear end cover are correspondingly covered at two ends of the shell, the first step portion and the second step portion of the spindle body penetrate through the front end cover to extend out, a first rotary sealing ring is arranged between the second step portion and the front end cover, the fifth step portion of the spindle body extends into the rear end cover, and a second rotary sealing ring is arranged between the fifth step portion and the rear end cover.

2. The enhanced spindle structure according to claim 1, wherein: one side of the inner ring of the first thrust roller bearing is pressed on the second step part, and the other side of the inner ring of the first thrust roller bearing is pressed on the inner ring of the first self-aligning roller bearing through the first ring sleeve.

3. The enhanced spindle structure according to claim 1 or 2, wherein: a nut is arranged at one end of the fourth step part close to the fifth step part, the outer ring of the second thrust roller bearing is pressed against the other side wall of the annular protrusion, the inner ring of the second thrust roller bearing is pressed against one side of the inner ring of the second self-aligning roller bearing through a second ring sleeve, and the other side of the inner ring of the second self-aligning roller bearing is pressed against the nut through a third ring sleeve.

4. The enhanced spindle structure according to claim 1, wherein: the end face center position of the first step portion is provided with a conical boss, and the inclined plane angle of the conical boss is 7-9 degrees.

5. The enhanced spindle structure according to claim 4, wherein: the terminal surface peripheral position of first step portion is centre of a circle symmetry and is equipped with a plurality of screw holes.

6. The enhanced spindle structure according to claim 1, wherein: the first thrust roller bearing and the second thrust roller bearing are oppositely oriented.

7. The enhanced spindle structure according to claim 1, wherein: the outer wall of the shell is locally and radially bulged to form a thickened part, and a cooling pipeline is arranged in the thickened part.

8. The enhanced spindle structure according to claim 1, wherein: an assembly cavity for installing an overrunning clutch is arranged in the center of the end face of the fifth step part, and an opening corresponding to the assembly cavity is formed in the rear end cover.

9. The enhanced spindle structure of claim 8, wherein: one end of the inner side of the opening is radially enlarged to form a concave position matched with the outline of the fifth step part, and the second rotary sealing ring is positioned on the concave position.

10. The enhanced spindle structure according to any one of claims 4 to 9, wherein: the type of the first self-aligning roller bearing is 22226E, the type of the second self-aligning roller bearing is 22224E, the type of the first thrust roller bearing is 29326E, and the type of the second thrust roller bearing is 29324E.