Electric spindle

Abstract

An electric spindle comprises a spindle body and a supporting seat, the spindle body is provided with a shell and a rotating shaft rotationally supported in the shell, the rear end of the rotating shaft extends out of the shell, a material containing hole is formed in the rotating shaft, and a material outlet communicated with the material containing hole is formed in the front end of the rotating shaft. A material inlet communicated with the material storage hole is formed in the rear end of the rotating shaft; the supporting seat is arranged on the periphery of the rear end of the rotating shaft and is fixed with the shell; a first bearing is arranged on the periphery, corresponding to the rear end of the rotating shaft, of the supporting base, and the rear end of the rotating shaft is supported in the first bearing. The supporting seat supports the part, extending out of the rear end of the shell, of the rotating shaft through the first bearing, vibration generated when the motorized spindle operates at a high rotating speed is reduced through the supporting effect, and therefore the stability of the motorized spindle at the high rotating speed is improved, the workpiece machining quality is improved, and noise generated during machining is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric main shaft, especially be applied to the electric main shaft of precision longitudinal cutting numerical control lathe. BACKGROUND

[0002] Longitudinal cutting numerical control lathe is also called as the heart type numerical control lathe, or main shaft box mobile type numerical control lathe, belongs to precision machining equipment, can complete simultaneously once car, milling, drilling, boring, attack, carving and so on compound processing, mainly used for the batch processing of precision hardware, shaft type non-standard parts, and electric main shaft is the key component of longitudinal cutting numerical control lathe. CONTENT

[0003] The utility model aims at providing a kind of electric main shaft to improve the stability of electric main shaft under high speed.

[0004] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] An electric main shaft, comprising:

[0006] A main shaft body has a housing, a rotating shaft is rotatably supported in the housing, the rear end of the rotating shaft extends out of the housing, a material receiving hole is provided in the rotating shaft, a material outlet communicating with the material receiving hole is provided at the front end of the rotating shaft, and a material inlet communicating with the material receiving hole is provided at the rear end of the rotating shaft; and

[0007] A support seat is provided on the outer periphery of the rear end of the rotating shaft and is fixed with the housing.

[0008] The support seat is provided with a first bearing corresponding to the outer periphery of the rear end of the rotating shaft, and the rear end of the rotating shaft is supported in the first bearing.

[0009] The first bearing is provided with a bearing seat, the support seat is provided with a mounting hole of the bearing seat, the bearing seat is gap-fitted with the mounting hole, and the bearing seat is detachably connected with the support seat.

[0010] In some embodiments, the bearing seat is provided with a bearing inlet at the end away from the housing, the bearing inlet is provided with a bearing gland, the bearing gland is detachably connected with the bearing seat, and the outer ring of the first bearing is pressed from the axis direction of the rotating shaft.

[0011] In some embodiments, the bearing gland comprises a short tube, the inner end of which is pressed against the outer ring of the first bearing, and a flange plate connected with the outer end of the short tube and detachably connected with the bearing seat.

[0012] In some embodiments, the rear end of the rotating shaft is provided with a shaft shoulder, the inner ring of the first bearing is connected with the shaft shoulder, and the end of the inner ring is pressed against the stepped portion of the shaft shoulder.

[0013] In some embodiments, the material receiving hole is provided with a clamping hole for the external clamp to extend into, corresponding to the position of the support seat.

[0014] In some embodiments, the shell is provided with a stator, and the rotating shaft is provided with a rotor corresponding to the stator.

[0015] In some embodiments, the front end and the rear end of the shell are respectively provided with a second bearing, and the rotating shaft is further supported by the second bearing.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] The support seat supports the part of the rotating shaft extending out of the rear end of the shell through the first bearing, the supporting action reduces the vibration of the electric spindle when it runs at high speed, thereby improving the stability of the electric spindle at high speed, improving the workpiece machining quality, and reducing the noise during machining. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The figure is a schematic view of some embodiments of the electric spindle;

[0019] Figure 2 The figure is a sectional view thereof;

[0020] Figure 3 The figure is Figure 2 The figure is an enlarged view of the A part in the middle;

[0021] Reference signs:

[0022] 100, main shaft body; 110, shell; 120, rotating shaft; 121, rear end; 122, material inlet; 123, clamping hole; 124, material receiving hole; 125, material outlet; 126, shaft shoulder; 130, motor; 131, stator; 132, rotor; 140, second bearing; 200, support seat; 300, first bearing; 400, bearing gland; 410, short pipe; 420, flange; 500, bearing seat; 501, bearing placement inlet. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only some of the embodiments of the utility model, but not all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial......), the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), if the specific posture changes, then the directionality indication also changes accordingly.

[0025] In addition, if the embodiments of the utility model have the description of "first" or "second" and the like, the description of "first" or "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0026] In combination Figures 1-3 , the electric spindle comprises a spindle body 100 and a support seat 200.

[0027] The spindle body 100 has a housing 110 and a rotating shaft 120, the rotating shaft 120 is rotatably supported in the housing 110, the rear end 121 of the rotating shaft 120 extends out of the housing 110, the rotating shaft 120 is provided with a material receiving hole 124, the front end of the rotating shaft 120 is provided with a material outlet 125 communicating with the material receiving hole 124, and the rear end 121 of the rotating shaft 120 is provided with a material inlet 122 communicating with the material receiving hole 124. During machining, the material (such as a steel bar) is placed into and fixed in the material receiving hole 124 from the material inlet 122, the front end of the material extends out of the material outlet 125, and the rotating shaft 120 rotates around its axis to drive the material to rotate.

[0028] The support seat 200 is arranged on the outer periphery of the rear end 121 of the rotating shaft 120, the support seat 200 is fixed to the housing 110 by screws, and the support seat 200 is used to support the matching mechanism of the electric spindle.

[0029] The support seat 200 is provided with a first bearing 300 corresponding to the outer periphery of the rear end 121 of the rotating shaft 120, the inner ring of the first bearing 300 is connected with the rotating shaft 120, the outer ring of the first bearing 300 is connected with the support seat 200, and the rear end 121 of the rotating shaft 120 is supported in the first bearing 300.

[0030] In the existing precision longitudinal cutting numerical control lathe, the electric spindle also has a support seat, but the support seat is only used to support the matching mechanism of the electric spindle, and the support seat does not support the rotating shaft of the electric spindle. The part of the rotating shaft that protrudes from the rear end of the shell is in an unsupported state. Moreover, the material is arranged in the rotating shaft through the front end and the rear end of the rotating shaft during processing, which increases the vibration of the rotating shaft during high-speed operation (more than 10,000 revolutions per minute), cannot guarantee the stability of the workpiece, and affects the processing quality of the workpiece. In the embodiment, the support seat 200 can support the part of the rotating shaft 120 that protrudes from the rear end of the shell 110 through the first bearing 300. The supporting action reduces the vibration of the electric spindle during high-speed operation, thereby improving the stability of the electric spindle at high speed, improving the processing quality of the workpiece, and reducing the noise during processing.

[0031] Further, the first bearing 300 is connected with the support seat 200 through the bearing seat 500. Specifically, the support seat 200 is provided with a mounting hole of the bearing seat 500, the bearing seat 500 is in clearance fit with the mounting hole, and the bearing seat 500 is detachably connected with the support seat 200 through screws. After the screws are loosened, the position of the bearing seat 500 in the mounting hole can be adjusted. In this way, the position of the first bearing 300 in the radial direction of the rotating shaft 120 can be adjusted, the coaxiality of the first bearing 300 and the rotating shaft 120 is guaranteed, and the wear of the first bearing 300 and the rotating shaft 120 is reduced.

[0032] Further, the end of the bearing seat 500 away from the shell 110 is provided with a bearing inlet 501, and the bearing inlet 501 is provided with a bearing gland 400. The bearing gland 400 is detachably connected with the bearing seat 500 through screws, and the bearing gland 400 presses the outer ring of the first bearing 300 from the axis direction of the rotating shaft 120. The bearing gland 400 presses the outer ring of the first bearing 300 in the bearing seat 500, guarantees that the first bearing 300 does not move in the bearing seat 500, and prolongs the service life of the first bearing 300.

[0033] Further, the bearing gland 400 includes a short pipe 410 and a flange plate 420. The inner end of the short pipe 410 is pressed against the outer ring of the first bearing 300, and the flange plate 420 is connected to the outer end of the short pipe 410. The flange plate 420 is detachably connected to the bearing seat 500 through screws. After the screws are loosened, the bearing gland 400 can be conveniently removed, and the first bearing 300 can be removed and replaced or maintained.

[0034] Further, the rear end 121 of the rotating shaft 120 is provided with a shaft shoulder 126, and the shaft shoulder 126 is connected with the inner ring of the first bearing 300. The end of the inner ring is pressed against the stepped portion of the shaft shoulder 126, and the first bearing 300 is axially positioned, thereby guaranteeing the accurate positioning of the first bearing 300 in the rotating shaft 120.

[0035] In some embodiments, the material receiving hole 124 is provided with a clamping hole 123 corresponding to the position of the support seat 200, and during processing, the clamp on the support seat 200 extends into the material receiving hole 124 through the clamping hole 123 to clamp and fix the material in the material receiving hole 124.

[0036] Further, the housing 110 is provided with a stator 131, and the rotating shaft 120 is provided with a rotor 132 corresponding to the stator 131 to form a motor 130. During processing, the motor 130 is powered, the rotor 132 rotates, and the rotor 132 drives the rotating shaft 120 to rotate.

[0037] Further, the front end and the rear end 121 of the housing 110 are respectively provided with a second bearing 140 through a bearing seat, and the rotating shaft 120 is rotatably supported in the housing 110 through the second bearing 140.

[0038] The above detailed description of the present application through specific embodiments is only limited to helping those skilled in the art to understand the content of the present application, and cannot be understood as a limitation on the protection scope of the present application. Various decorations, equivalent transformations and the like of the above-mentioned scheme by those skilled in the art under the concept of the present application shall be included in the protection scope of the present application.

Claims

1. An electric spindle, characterized by, The electric spindle comprises a spindle body (100) having a housing (110), a rotating shaft (120) rotatably supported in the housing (110), a rear end (121) of the rotating shaft (120) extending out of the housing (110), a material receiving hole (124) provided in the rotating shaft (120), a material outlet (125) provided at a front end of the rotating shaft (120) and communicating with the material receiving hole (124), and a material inlet (122) provided at the rear end (121) of the rotating shaft (120) and communicating with the material receiving hole (124); and a support base (200) provided at an outer periphery of the rear end (121) of the rotating shaft (120) and fixed to the housing (110). The support base (200) is provided with a first bearing (300) corresponding to the outer periphery of the rear end (121) of the rotating shaft (120), and the rear end (121) of the rotating shaft (120) is supported in the first bearing (300).

2. The electric spindle according to claim 1, wherein the first bearing (300) is provided with a bearing seat (500), the support base (200) is provided with a mounting hole of the bearing seat (500), the bearing seat (500) is in clearance fit with the mounting hole, and the bearing seat (500) is detachably connected to the support base (200).

3. The electric spindle according to claim 2, wherein the bearing seat (500) is provided with a bearing installation opening (501) at an end away from the housing (110), the bearing installation opening (501) is provided with a bearing gland (400), the bearing gland (400) is detachably connected to the bearing seat (500), and the bearing gland (400) compresses an outer ring of the first bearing (300) from an axial direction of the rotating shaft (120).

4. The electric spindle according to claim 3, wherein the bearing gland (400) comprises a short pipe (410) compressing the outer ring of the first bearing (300) at an inner end thereof, and a flange plate (420) connected to an outer end of the short pipe (410) and detachably connected to the bearing seat (500).

5. The electric spindle according to claim 1, wherein the rear end (121) of the rotating shaft (120) is provided with a shaft shoulder (126), the shaft shoulder (126) is connected to an inner ring of the first bearing (300), and an end of the inner ring is compressed against a stepped portion of the shaft shoulder (126).

6. The electric spindle according to claim 1, wherein the material receiving hole (124) is provided with a clamping hole (123) corresponding to a position of the support base (200) and allowing an external clamp to extend into the clamping hole (123).

7. The electric spindle according to claim 1, wherein the housing (110) is provided with a stator (131), and the rotating shaft (120) is provided with a rotor (132) corresponding to the stator (131).

8. The electric spindle according to claim 1, wherein the housing (110) is provided with a second bearing (140) at a front end and a rear end thereof respectively, and the rotating shaft (120) is further supported in the second bearing (140). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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