CN209902270U - Conveniently-detached chuck type center structure - Google Patents

Abstract

The utility model relates to a convenient top structure of chuck formula of dismantling, including axle center, collet chuck, spring, bearing frame, the axle center is equipped with the taper hole of intercommunication and the cylinder structure of straight blind hole for a terminal surface, and the lateral surface of its trompil one end is equipped with the screw thread, still includes lock nut, the spring is placed in straight blind hole, one end of collet chuck is the toper and places in the taper hole of axle center with the spring butt, lock nut passes and pushes down collet chuck back spiro union on the axle center, still includes a plurality of bearing on the bearing frame, the axle center is cup jointed in the bearing of bearing frame, and the work piece that the terminal surface is less or not allowed to remain the central point and do not have unnecessary length is processed promptly to the tiny processing tip that can be better, and its collet chuck dismantles and changes the convenience, and overall structure is simple, and convenient to use can effectively.

Description

Conveniently-detached chuck type center structure

Technical Field

The utility model relates to a digit control machine tool equipment especially relates to a convenient top structure of chuck formula of dismantling.

Background

The numerically controlled lathe is one of the widely used numerically controlled machines at present. The cutting tool is mainly used for cutting processing of inner and outer cylindrical surfaces of shaft parts or disc parts, inner and outer conical surfaces with any taper angles, complex rotary inner and outer curved surfaces, cylindrical threads, conical threads and the like. In general, for machining a long shaft part, one end of the part needs to be clamped on a main shaft chuck or a chuck, and the other end of the part needs to be pointed by a tip arranged on a tailstock for reprocessing, so that the part is prevented from being too long and being bent, deformed, broken and damaged when rotating at a high speed, and the concentricity of the part is ensured. However, the conventional center cannot finish machining a part having a small end face or not allowing a center point to be maintained without an excessive length because the tip portion of the center is tapered. And the machining precision of a common tip can be seriously influenced after the tip is worn and deformed, and the whole set of replacement can also increase the production cost.

Disclosure of Invention

An object of the utility model is to provide a convenient top structure of chuck formula of dismantling easily deals with the less condition of long axis class part terminal surface, its simple structure, convenient to use dismantles moreover and changes the convenience, reduces the replacement cost.

The utility model adopts the technical proposal that: the utility model provides a convenient top structure of chuck formula of dismantling, includes axle center, collet chuck, spring, bearing frame, the axle center is the cylinder structure that a terminal surface was equipped with the tapering hole and the straight blind hole of intercommunication, and the lateral surface of its trompil one end is equipped with the screw thread, still includes lock nut, the spring is placed in straight blind hole, one end of collet chuck is the toper and places in the tapering hole of axle center and spring butt, lock nut passes and pushes down collet chuck back spiro union on the axle center, still includes a plurality of bearing on the bearing frame, the axle center cup joints in the bearing of bearing frame.

Wherein, one end of the bearing seat is opened, and the other end is provided with a taper shank with Morse taper.

Wherein, the utility model discloses still include the gland ring of outband screw thread, the gland ring connects on the bearing frame with bearing frame open end threaded connection's lid.

The inner side of the gland ring is provided with a groove, and a sealing ring is arranged in the groove.

The end part of the taper shank, which is far away from the bearing seat, is provided with a threaded hole, and a screw is arranged on the threaded hole.

The bearing is a first ball bearing, a plane bearing and a second ball bearing which are sequentially arranged on the bearing seat from one end provided with the spring chuck, and further comprises a needle bearing sleeved at the tail part of the axis far away from the chuck.

Compared with the prior art, the utility model has the following advantage: the utility model discloses a convenient top structure of chuck formula of dismantling, adopt collet chuck's axle center structure, make unoperated state's collet chuck be in lax state with spring butt collet chuck, can freely install and remove the tip of major axis class work piece, operating condition's collet chuck overcomes spring force under the support of work piece tip is pressed, collet chuck tightens up and stable centre gripping work piece, can be better handle the tip tiny promptly the processing terminal surface less or not allow to remain the central point and do not have unnecessary length's work piece, its collet chuck dismantles and changes the convenience, the overall structure is simple, high durability and convenient use, can effectively reduce the replacement cost.

Drawings

Fig. 1 is a sectional view of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a schematic perspective view of the present invention.

Fig. 4 is a sectional view of the present invention in an applied state.

The numbers in the figure are 1-axis, 2-spring chuck, 3-spring, 4-bearing seat, 5-lock nut, 6-bearing, 61-first ball bearing, 62-plane bearing, 63-second ball bearing, 64-needle bearing, 7-gland ring, 71-groove, 8-sealing ring and 9-screw.

The specific implementation mode is as follows:

in order to enhance the understanding of the present invention, the following detailed description will be made in conjunction with the embodiments and the accompanying drawings. The utility model discloses the accessible is implemented as follows:

referring to fig. 1 to 4, the conveniently detachable chuck type center structure comprises an axis 1, a collet chuck 2, a spring 3 and a bearing seat 4, wherein the axis 1 is a cylindrical structure with an end face provided with a taper hole and a straight blind hole which are communicated, and the outer side face of one end with an opening is provided with a thread. The spring chuck device is characterized by further comprising a locking nut 5, the spring 3 is placed in the straight blind hole, one end of the spring chuck 2 is conical and is placed in the taper hole of the shaft center 1 to be abutted against the spring 3, and the locking nut 5 penetrates through and presses the spring chuck 2 and then is screwed on the shaft center 1, so that the spring chuck 2 is guaranteed against falling off.

When the self-tightening clamp is in a working state, a workpiece is embedded into the spring clamp 2 and forms an axial acting force, the spring clamp 2 generates elastic deformation under the constraint of the taper hole, the clamp hole is reduced, the workpiece is automatically clamped, and the self-tightening function is achieved. When the machining is finished, the external force on the spring chuck 2 is removed, the spring 3 pushes the spring chuck 2 out for certain displacement, the chuck hole is restored to the original size, the part is loosened, the self-loosening function is realized, and the center of a workpiece with a small end part, namely a small machined end surface or a workpiece without an excessive length and without allowing a central point to be reserved is finished by replacing a common center. The machining center also comprises a plurality of bearings 6 on the bearing seat 4, the shaft center 1 is sleeved in the bearings 6 of the bearing seat 4, the concentricity of the shaft center 1 is ensured through the bearings 6, and the machining quality of the center precision is ensured.

The bearing seat 4 is provided with an opening at one end and a taper shank with Morse taper at the other end, the bearing 6 and the shaft center 1 are inserted into one end of the opening, the taper shank with Morse taper at the other end can be quickly and conveniently assembled and disassembled on a taper hole of the machine tool tailstock, and the concentricity is ensured.

Wherein, the utility model discloses still include gland ring 7 of outband screw thread, gland ring 7 connects on bearing frame 4 with 4 opening end threaded connection's of bearing frame lid, and is further, gland ring 7 inboard is equipped with recess 71, be provided with sealing washer 8 in the recess 71, restriction bearing 6 and axle center 1 stable the installing on bearing frame 4, recess 71 and sealing washer 8 set up moreover and can prevent outside cutting fluid entering bearing frame 4 internal damage bearing 6.

The end part of the taper shank, which is far away from the bearing seat 4, is provided with a threaded hole, the threaded hole is provided with a screw 9, the dustproof and waterproof effects are achieved, and the screw 9 can be taken out to facilitate the disassembly and maintenance of the shaft center 1.

Specifically, the bearing 6 is a first ball bearing 61, a plane bearing 62 and a second ball bearing 63 which are sequentially arranged on the bearing seat 4 from one end provided with the collet chuck 2, and further comprises a needle bearing 64 which is sleeved at the tail part of the shaft center 1 far away from the collet chuck, wherein the first bearing and the second bearing are supported, the plane bearing 62 in the middle improves the axial load capacity of the tip, the needle bearing 64 is arranged at the tail end to stabilize the shaft center 1 and improve the radial load capacity of the tip, the concentricity of the shaft center 1 is further ensured, and the precision of tip processing is improved.

Finally, it should be noted that: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a convenient centre structure of chuck formula of dismantling which characterized in that: including axle center, collet chuck, spring, bearing frame, the axle center is the cylinder structure that an end face was equipped with the tapering hole of intercommunication and straight blind hole, and the lateral surface of its trompil one end is equipped with the screw thread, still includes lock nut, the spring is placed in straight blind hole, collet chuck's one end is the toper and places in the tapering hole of axle center with the spring butt, lock nut passes and pushes down collet chuck back spiro union on the axle center, still includes a plurality of bearing on the bearing frame, the axle center cup joints in the bearing of bearing frame.

2. A removable cartridge center arrangement as recited in claim 1, wherein: one end of the bearing seat is open, and the other end of the bearing seat is provided with a taper shank with Morse taper.

3. A removable cartridge center construction as claimed in claim 2, wherein: the bearing seat is characterized by further comprising a gland ring with external threads, and the gland ring is connected with a cover of the opening end of the bearing seat in a threaded manner and is connected onto the bearing seat.

4. A removable cartridge center construction as claimed in claim 3, wherein: the gland ring is characterized in that a groove is formed in the inner side of the gland ring, and a sealing ring is arranged in the groove.

5. A removable cartridge center construction as claimed in claim 2, wherein: the end part of the taper shank, which is far away from the bearing seat, is provided with a threaded hole, and a screw is arranged on the threaded hole.

6. A removable cartridge center arrangement as recited in claim 1, wherein: the bearing is a first ball bearing, a plane bearing and a second ball bearing which are sequentially arranged on the bearing seat from one end provided with the spring chuck, and also comprises a needle bearing sleeved at the tail part of the axis far away from the chuck.

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