Machine tool spindle

Abstract

The utility model provides a machine tool spindle which comprises a clamping seat, a spindle axis is arranged in the clamping seat, the spindle axis can rotate in the clamping seat, and a clamping assembly is arranged in the spindle axis. The clamping assembly comprises a spring, front push sleeves and a front push chuck, the two front push sleeves are arranged at the two ends of the axis of the main shaft respectively, the spring is arranged between the two front push sleeves, and the two ends of the spring abut against the front push sleeves on the two sides respectively; compared with the prior art, when raw materials of the same type need to be machined, the multiple sets of ejector pins are driven by a machine tool to gradually extrude inwards, the front push sleeves on the two sides contract inwards so that the inclined slope faces can be away from the inclined conical face, the unlimited tightening parts can be opened, and workers can take and place the raw materials conveniently; and then the machine tool is far away, the front push sleeve automatically resets under the action of the spring, so that the tightening part is compressed, and the raw materials are clamped in the main shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool spindles, in particular to a machine tool spindle. Background Art

[0002] When it is necessary to process the workpiece, it is often necessary to use a fixture to clamp the raw material to be processed. When processing relatively regular rod-shaped raw materials, CNC lathes are often used for turning. The existing lathe spindles mostly use three-jaw chucks to clamp the raw materials. The three-jaw chuck has a large clamping range and also has an excellent clamping effect. However, the three-jaw chuck often requires the use of tools for auxiliary tightening, otherwise it is easy to affect the processing quality of the workpiece, and it takes a long time to load and remove the workpiece, affecting the processing efficiency.

[0003] In order to improve the processing efficiency, hydraulic or pneumatic force is often installed on the spindle as the clamping power. However, after a long period of processing, oil leakage or air leakage is prone to occur, resulting in reduced clamping force, oil leakage, and air leakage. After oil leakage and air leakage occur, the maintenance workload is very large, which will also affect the processing efficiency. Therefore, a more efficient spindle is needed to adapt to batch processing. Utility Model Content

[0004] The utility model aims to provide a machine tool spindle, aiming to solve the problem that the existing lathe spindles have low efficiency when performing batch processing.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a machine tool spindle, including a clamping seat, a spindle axis is arranged in the clamping seat, the spindle axis can rotate in the clamping seat, and a clamping assembly is arranged in the spindle axis; the clamping assembly includes a spring, a front push sleeve and a front push chuck, a front push sleeve is respectively provided at both ends of the spindle axis, the spring is arranged between the two front push sleeves, and the two ends of the spring are respectively against the front push sleeves on both sides; a front push chuck is respectively installed in the front push sleeves on both sides, and the front push chuck is used to clamp the workpiece; a front pressure cover is respectively provided on both sides of the spindle axis, and the front pressure cover is used to limit the front push chuck and the front push sleeve to the spindle axis.

[0006] Furthermore, a tightening part is provided on the front push chuck, and a plurality of groups of slots are provided at the tightening part, the slots divide the tightening part into a plurality of sections, the tightening part is provided with an inclined convexity at the divided part, an inclined conical surface is provided on the inclined convexity, and the taper of the inclined conical surface is between 1:1.5 and 1:2; an inclined slope surface corresponding to the inclined conical surface is provided on the front push sleeve, and the taper of the inclined slope surface is consistent with the taper of the inclined conical surface.

[0007] Furthermore, a clamping pad is provided on the side of the tightening portion away from the inclined protrusion.

[0008] Furthermore, a plurality of groups of ejector pins are arranged on the front gland, one end of the ejector pins is located outside the front gland, and the other end is against the front push sleeve.

[0009] Furthermore, a bearing chamber is provided between the clamping seat and the axis of the main shaft, and the bearing chamber is used to place the rotating shaft bearing.

[0010] Furthermore, a bearing outer pressure ring and a bearing inner pressure ring are arranged at one end of the bearing chamber, and the bearing inner pressure ring and the bearing outer pressure ring are used to seal the bearing chamber. The bearing inner pressure ring is installed on the main shaft axis, and the bearing outer pressure ring is installed on the clamp seat.

[0011] Furthermore, waterproof covers are installed on the outer pressure ring of the bearing and the clamp seat, and a labyrinth sealing mechanism is provided at the connection between the inner pressure ring of the bearing, the outer pressure ring of the bearing, and the clamp seat and the main shaft axis.

[0012] Furthermore, a small pulley is arranged on the axis of the main shaft.

[0013] Compared with the prior art, the utility model provides a machine tool spindle. When the same type of raw material needs to be processed, multiple groups of ejectors are gradually squeezed inwardly under the drive of the machine tool, and the front push sleeves on both sides are contracted inwardly to make the inclined slope surface away from the inclined cone surface, and the tightening part without restriction is opened to facilitate the staff to take and place the raw material; then the machine tool is moved away, and the front push sleeve is automatically reset under the action of the spring to make the tightening part compressed, so that the raw material is clamped in the spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional cross-sectional view of the utility model;

[0015] Figure 2 It is the installation view of the utility model;

[0016] Figure 3 It is an exploded view of the utility model;

[0017] Figure 4 It is a three-dimensional cross-sectional view of the clamping seat in the utility model;

[0018] Figure 5 It is a three-dimensional cross-sectional view of the main shaft axis of the utility model;

[0019] Figure 6 It is a three-dimensional cross-sectional view of the clamping assembly in the utility model;

[0020] Figure 7 It is a three-dimensional cross-sectional view of the front push sleeve and the front push chuck in the utility model;

[0021] Figure 8 It is a three-dimensional view of the forward push chuck in the utility model;

[0022] Fig. 9It is a three-dimensional view of the front push sleeve in the utility model;

[0023] Fig.10 It is a three-dimensional cross-sectional view of the inner pressure ring of the bearing in the utility model;

[0024] Fig.11 yes Fig.10 A partial enlarged view of part A.

[0025] Description of reference numerals:

[0026] Among them; 1. clamping seat; 2. spindle axis; 3. clamping assembly; 30. spring; 31. forward push sleeve; 310. inclined slope; 32. forward push chuck; 320. tightening part; 321. oblique convex; 322. inclined cone; 323. slot; 324. clamping pad; 33. front pressure cover; 34. ejector pin; 4. inner pressure ring of bearing; 5. outer pressure ring of bearing; 6. bearing chamber; 7. waterproof cover plate; 8. small pulley; 9. transverse movement mechanism; 90. loosen the fixing ring. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with specific embodiments.

[0028] In the present utility model, unless otherwise clearly specified and limited, when terms such as "set on", "connected", and "connected" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through one or more intermediate media. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. The directional words that appear in the present utility model are to better illustrate the characteristics of the features and the relationship between the features. It should be understood that when the placement direction of the present utility model changes, the characteristics of the features and the direction of the relationship between the features also change accordingly. Therefore, the directional words do not constitute an absolute limitation on the characteristics of the features and the relationship between the features in space, but only play a relative limitation role.

[0029] like Figures 1 to 11 As shown, the utility model provides a machine tool processing spindle, including a clamping seat 1, a spindle axis 2 is arranged in the clamping seat 1, the spindle axis 2 can rotate in the clamping seat 1, and a clamping assembly 3 is arranged in the spindle axis 2; the clamping assembly 3 includes a spring 30, a front thrust sleeve 31 and a front thrust chuck 32, a front thrust sleeve 31 is respectively provided at both ends of the spindle axis 2, the spring 30 is arranged between the two front thrust sleeves 31, and the two ends of the spring 30 are respectively against the front thrust sleeves 31 on both sides; a front thrust chuck 32 is respectively installed in the front thrust sleeves 31 on both sides, and the front thrust chuck 32 is used to clamp the workpiece; a front pressure cover 33 is respectively provided on both sides of the spindle axis 2, and the front pressure cover 33 is used to limit the front thrust chuck 32 and the front thrust sleeve 31 in the spindle axis 2.

[0030] In this embodiment, a tightening portion 320 is provided on the front push chuck 32, and a plurality of groups of slots 323 are provided at the tightening portion 320. The slots 323 divide the tightening portion 320 into a plurality of sections. The tightening portion 320 is provided with an inclined protrusion 321 at the divided portion, and an inclined conical surface 322 is provided on the inclined protrusion 321, and the taper of the inclined conical surface 322 is between 1:1.5 and 1:2; an inclined slope surface 310 corresponding to the inclined conical surface 322 is provided on the front push sleeve 31, and the taper of the inclined slope surface 310 is consistent with the taper of the inclined conical surface 322.

[0031] Through the above-mentioned design scheme, under the action of the elastic force of the spring 30 itself, the front push sleeves 31 at both ends extend to both sides respectively, and the inclined protrusions 321 on both sides are pressed into the front push sleeve 31, and the divided tightening part 320 can swing inward or outward for a certain distance, and the inclined protrusions 321 pressed into the front push sleeve 31 can gradually tighten the tightening part 320; through force analysis, it can be obtained that when the taper is between 1:1.5 and 1:2, the clamping part needs a force several times that of the elastic force applied by the spring 30 to push the front push sleeve 31 inward, and the taper between 1:1.5 and 1:2 can ensure that the inclined slope surface 310 can smoothly press down the inclined cone surface 322.

[0032] In this embodiment, a clamping pad 324 is provided on the side of the tightening portion 320 away from the inclined protrusion 321. When it is necessary to process a material of another diameter, the staff only needs to replace the forward pushing chuck 32 with a clamping pad 324 of different thickness.

[0033] In this embodiment, a plurality of ejector pins 34 are disposed on the front pressure cover 33 , one end of the ejector pin 34 is located outside the front pressure cover 33 , and the other end thereof abuts against the front push sleeve 31 .

[0034] Through the above design, the multiple groups of ejector pins 34 on the front gland 33 can resist the front push sleeve 31 from different positions. When the ejector pins 34 are pressed down, the front push sleeve 31 is squeezed inward, the spring 30 is squeezed and contracted, and the front push sleeve 31 retreats to make the inclined conical surface 322 lose its restriction. The tightening part 320 that loses its restriction automatically unfolds under the action of its own elasticity, so that the staff can remove the processed workpiece and replace it with the raw material to be processed. After the raw material is replaced, the ejector pins 34 retreat, and the front push sleeve 31 is pushed out again under the action of the spring 30, the inclined slope 310 presses the inclined conical surface 322 to tighten the tightening part 320, and the clamping pad 324 clamps the raw material for processing.

[0035] A transverse movement mechanism 9 is provided on the machine tool. The transverse movement mechanism 9 can be moved on the machine tool. It only needs to install a loosening fixing ring 90 on the original transverse movement mechanism 9. The transverse movement mechanism 9 drives the loosening fixing ring 90 to approach or move away from the ejector pin 34. When the loosening fixing ring 90 presses the ejector pin 34, the tightening part 320 relaxes to facilitate the replacement of raw materials. When the transverse movement mechanism 9 drives the loosening fixing ring 90 to move away from the ejector pin 34, the spring 30 pushes the front push sleeve 31 to press the front push chuck 32 so that the tightening part 320 is tightened to clamp the raw material on the main shaft.

[0036] In this embodiment, a bearing chamber 6 is provided between the clamping seat 1 and the spindle axis 2, and the bearing chamber 6 is used to place the rotating shaft bearing.

[0037] In this embodiment, a bearing outer pressure ring 5 and a bearing inner pressure ring 4 are provided at one end of the bearing chamber 6. The bearing inner pressure ring 4 and the bearing outer pressure ring 5 are used to seal the bearing chamber 6. The bearing inner pressure ring 4 is installed on the main shaft axis 2, and the bearing outer pressure ring 5 is installed on the clamping seat 1.

[0038] Through the above-mentioned design scheme, the rotating shaft bearing can fix the main shaft axis 2 while ensuring the stable rotation of the main shaft axis 2 in the clamping seat 1. In this embodiment, a threaded portion is provided on the main shaft axis 2 and is threadedly connected with the bearing inner pressure ring 4. The bearing inner pressure ring 4 and the bearing outer pressure ring 5 cooperate with each other to seal the bearing chamber 6, thereby preventing external factors from interfering with the service life of the rotating shaft bearing.

[0039] In this embodiment, waterproof cover plates 7 are installed on the bearing outer pressure ring 5 and the clamp seat 1, and labyrinth sealing mechanisms are provided at the connection between the bearing inner pressure ring 4 and the bearing outer pressure ring 5, and the clamp seat 1 and the spindle axis 2. The waterproof cover plate 7 can prevent coolant and the like from penetrating into the bearing chamber 6 while being used for fastening. Together with the labyrinth sealing structures on both sides of the bearing chamber 6, it is ensured that the bearing in the bearing chamber 6 can always be immersed in lubricating oil, thereby ensuring the service life of the bearing.

[0040] In this embodiment, a small pulley 8 is provided on the main shaft axis 2, and the small pulley 8 can be connected to the driving motor on the machine tool through linkage components such as a synchronous belt or a transmission chain. The main shaft axis 2 can be driven by the driving motor to drive the raw material to rotate.

[0041] Compared with the prior art, the present invention provides a machine tool processing spindle. When the same type of raw material needs to be processed, multiple groups of ejectors 34 are gradually squeezed inwardly under the drive of the machine tool, and the front push sleeves 31 on both sides shrink inwardly to make the inclined slope surface 310 away from the inclined cone surface 322, and the tightening part 320 without restriction opens to facilitate the staff to take and place the raw material; then the machine tool is moved away, and the front push sleeve 31 is automatically reset under the action of the spring 30 to make the tightening part 320 compressed, thereby clamping the raw material in the spindle.

[0042] In the absence of conflict, the above-mentioned embodiments and features thereof may be combined with each other.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A machine tool spindle, comprising a clamping seat (1), characterized in that: A spindle axis (2) is arranged in the clamping seat (1), and the spindle axis (2) can rotate in the clamping seat (1). A clamping assembly (3) is arranged in the spindle axis (2); the clamping assembly (3) comprises a spring (30), a front thrust sleeve (31) and a front thrust chuck (32); a front thrust sleeve (31) is respectively arranged at both ends of the spindle axis (2), the spring (30) is arranged between the two front thrust sleeves (31), and the two ends of the spring (30) are respectively pressed against the front thrust sleeves (31) on both sides; a front thrust chuck (32) is respectively installed in the front thrust sleeves (31) on both sides, and the front thrust chuck (32) is used to clamp a workpiece; a front pressure cover (33) is respectively arranged on both sides of the spindle axis (2), and the front pressure cover (33) is used to restrict the front thrust chuck (32) and the front thrust sleeve (31) in the spindle axis (2).

2. A machine tool spindle according to claim 1, characterized in that: A tightening portion (320) is arranged on the front push chuck (32), and a plurality of groups of slots (323) are arranged at the tightening portion (320), and the slots (323) divide the tightening portion (320) into a plurality of sections. The tightening portion (320) is provided with an inclined protrusion (321) at the divided portion, and an inclined conical surface (322) is arranged on the inclined protrusion (321), and the taper of the inclined conical surface (322) is between 1:1.5 and 1:2; an inclined slope surface (310) corresponding to the inclined conical surface (322) is arranged on the front push sleeve (31), and the taper of the inclined slope surface (310) is consistent with the taper of the inclined conical surface (322).

3. A machine tool spindle according to claim 2, characterized in that: A clamping pad (324) is provided on the side of the tightening portion (320) away from the inclined protrusion (321).

4. A machine tool spindle according to claim 1, characterized in that: A plurality of groups of ejector pins (34) are arranged on the front pressure cover (33), one end of the ejector pins (34) is located outside the front pressure cover (33), and the other end thereof abuts against the front push sleeve (31).

5. The machine tool spindle according to claim 1, characterized in that: A bearing chamber (6) is provided between the clamping seat (1) and the main shaft axis (2), and the bearing chamber (6) is used for accommodating a rotating shaft bearing.

6. A machine tool spindle according to claim 5, characterized in that: A bearing outer pressure ring (5) and a bearing inner pressure ring (4) are arranged at one end of the bearing chamber (6). The bearing inner pressure ring (4) and the bearing outer pressure ring (5) are used to seal the bearing chamber (6). The bearing inner pressure ring (4) is installed on the main shaft axis (2), and the bearing outer pressure ring (5) is installed on the clamping seat (1).

7. A machine tool spindle according to claim 6, characterized in that: A waterproof cover plate (7) is installed on both the bearing outer pressure ring (5) and the clamp seat (1), and a labyrinth sealing mechanism is provided at the connection between the bearing inner pressure ring (4) and the bearing outer pressure ring (5), and the clamp seat (1) and the main shaft axis (2).

8. The machine tool spindle according to claim 1, characterized in that: A small pulley (8) is arranged on the main shaft center (2).

Images