CN213258350U - Mechanical equipment lead screw assembly prestretches structure - Google Patents

Abstract

The utility model relates to a mechanical equipment lead screw assembly prestretches structure, be used for mechanical numerical control lathe, including lead screw and prestretching subassembly, the lead screw includes the lead screw body of integrated into one piece, set up lead screw axle and lead screw nut at the lead screw body both ends separately, prestretch the subassembly and establish on the lead screw axle, prestretch the subassembly and include the bearing, accurate nut, bearing frame, spacer ring, bearing gland, the bearing is installed and is fixed in the bearing frame and wear to establish on the lead screw axle, leave the clearance between the terminal surface of bearing and lead screw body, bearing gland establishes at the terminal surface of bearing frame and with bearing surface butt, spacer ring passes bearing gland and supports and establishes on the surface of bearing, accurate nut wears to establish in the outer end of this lead screw axle and is used for locking correction thermal expansion elongated lead screw, the utility model optimizes the zero distance butt between lead screw body and the bearing to have 1-2 mm's clearance between the two, can prevent from, the normal use of the bearing is ensured, and the service life of the bearing is prolonged.

Description

Mechanical equipment lead screw assembly prestretches structure

Technical Field

The utility model relates to a lathe technical field indicates a mechanical equipment lead screw assembly prestretches structure especially.

Background

Its lead screw assembly structure of current mechanical numerical control lathe generally is with the bearing butt, and when equipment operation, can take place relative motion and generate heat between lead screw and the screw-nut, the lead screw can grow (within 0.2 mm) after the thermal expansion, not only can die the bearing, makes the bearing atress too big and lead to the action unsmooth, shortens its life, can influence the normal use of equipment finally, still can influence the machining precision of part, reduces the product percent of pass.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a protection bearing, guarantee machining precision's mechanical equipment lead screw assembly prestretches structure.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a structure is prestretched in mechanical equipment lead screw assembly, is used for mechanical numerical control lathe, including lead screw and prestretching subassembly, the lead screw includes integrated into one piece's lead screw body, sets up lead screw axle and the lead screw nut at lead screw body both ends respectively, prestretch the subassembly and establish on the lead screw axle, prestretch the subassembly and include bearing, accurate nut, bearing frame, spacer ring, bearing gland, the bearing installation is fixed in the bearing frame and wears to establish on the lead screw axle, leave the clearance between the terminal surface of bearing and lead screw body, the bearing gland is established at the terminal surface of bearing frame and with bearing surface butt, the spacer ring passes the bearing gland and supports and establish on the surface of bearing, accurate nut wears to establish in the outer end of this lead screw axle and is used for locking the correction thermal.

Preferably, the gap distance is 1-2 mm.

The beneficial effects of the utility model reside in that: the utility model optimizes the zero distance between the screw rod body and the bearing to a clearance of 1-2mm between the two, thereby preventing the bearing from being deadly jacked after the screw rod body is thermally expanded, ensuring the normal use of the bearing, prolonging the service life of the bearing,

the lead screw with the changed size after thermal expansion is corrected by the precision nut, so that the precision of the processed part can be ensured,

the bearing seat, the bearing gland and the spacing ring can stabilize the position of the bearing and prevent the bearing from shifting due to movement.

Drawings

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

FIG. 2 is an enlarged view of FIG. 1 at B

FIG. 3 is a schematic view of the structure of a mechanical numerically controlled lathe.

Fig. 4 is an enlarged view of fig. 3 at a.

Fig. 5 is an exploded view of a mechanical numerically controlled lathe.

Fig. 6 is a plan view of the mechanical numerically controlled lathe.

Description of reference numerals: 1. a base; 11. a boss; 12. installing an inclined plane; 2. a main spindle box; 3. a screw drive mechanism; 31. a screw rod body; 32. a screw shaft; 33. a pre-tensioning assembly; 331. a bearing; 332. a bearing seat; 333. a bearing gland; 334. a spacer ring; 335. precision nuts; 4, an X-axis slide rail; an X-axis slide block; 6, a Z-axis supporting plate; 7, Z-axis slide rail; 8, a Z-axis slide block; 9. a work table; 10. a back spindle assembly; 20. an anti-collision limit induction component; 21. a pushing device; 22. an inductive switch; 23. a detection rod; 30. and an inner protection metal plate.

Detailed Description

Referring to fig. 1-6, the present invention relates to a screw rod pre-tensioning structure for mechanical equipment, which is used in a mechanical numerically controlled lathe, and includes a screw rod and a pre-tensioning assembly 33, the screw rod includes a screw rod body 31 formed integrally and a screw rod shaft 32 and a screw rod nut separately arranged on the screw rod body 31, the pre-tensioning assembly 33 includes a bearing seat 332, a bearing 331, a bearing gland 333, a spacer ring 334 and a precision nut 335, the bearing 331 is arranged on the screw rod shaft 32 in a penetrating manner and has a gap D with the end surface of the screw rod body 31, the distance of the gap D is 1-2mm, the bearing seat 332 is arranged outside the bearing 331 in a pressing manner, the bearing gland 333 is arranged on the outer end surface of the bearing seat 332 and abuts against the surface of the bearing 331, the spacer ring 334 is arranged on the surface of the bearing 331 in a penetrating manner, the three are used for fixing the position of the bearing 331, the precision nut 335 is arranged on the outer end of the connecting shaft 32, since the lead screw becomes longer after thermal expansion, which affects the dimensional accuracy of the machined parts, the dimensional correction of the heated lead screw by the precision nut 335 can ensure the machining accuracy and the normal use of the bearing 331 and the whole equipment.

A mechanical numerical control lathe applying the mechanical equipment screw rod assembly pretension structure comprises a base 1, the base 1 is provided with a boss 11, the boss 11 is provided with an installation inclined plane 12, the installation inclined plane 12 is provided with a moving mechanism, one side of the boss 11 is provided with a main spindle box 2 which is vertical to the base 1, compared with the spindle box 2 which is obliquely arranged on the existing mechanical lathe, the mounting difficulty is reduced, the mounting and the maintenance are simple and convenient, a single-layer inner protection metal plate 30 is arranged between the boss 11 and the spindle box 2, compared with the existing lathe for installing the multilayer inner protective metal plate 30, the single-layer inner protective metal plate 30 is convenient to install, low in cost, smooth in action and free of noise when the equipment runs, low in failure rate, simple, attractive and convenient to maintain, the moving mechanism is connected with a workbench 9, a back spindle assembly 10 is arranged on the workbench 9, and an anti-collision limiting induction assembly 20 is connected to the back spindle assembly 10.

Preferably, the anti-collision limit sensing assembly 20 comprises a pushing device 21, a sensing switch 22 and a detection rod 23, the sensing switch 22 is connected to the pushing device 21, the detection rod 23 is connected to the sensing switch 22, the pushing device 21 is connected with a limit plate, and the moving distance of the workbench 9 can be limited by changing the position of the limit plate.

Preferably, the moving mechanism includes an X-axis moving mechanism and a Z-axis moving mechanism, the Z-axis moving mechanism is disposed on the X-axis moving mechanism, and the worktable 9 is disposed on the Z-axis moving mechanism.

Preferably, the X-axis moving mechanism includes a screw rod transmission mechanism 3, X-axis slide rails 4 and X-axis slide blocks 5 transversely arranged on the installation inclined plane 12, the two X-axis slide rails 4 are respectively arranged on two sides of the screw rod transmission mechanism 3, the X-axis slide blocks 5 are respectively arranged on the two X-axis slide rails 4 in a sliding manner, and the Z-axis moving mechanism is arranged on the X-axis slide blocks 5 and is connected with the screw rod through screw rod nuts in a transmission manner.

Preferably, the Z-axis moving mechanism includes a Z-axis supporting plate 6 perpendicular to the X-axis moving mechanism, a lead screw transmission mechanism 3, Z-axis sliding rails 7, and Z-axis sliding blocks 8 provided on the Z-axis supporting plate 6, the lead screw transmission mechanism 3 has the same structure as the lead screw transmission mechanism 3 of the X-axis moving mechanism, the two Z-axis sliding rails 7 are respectively provided on two sides of the lead screw transmission mechanism 3, the plurality of Z-axis sliding blocks 8 are respectively provided on the two Z-axis sliding rails 7, and the worktable 9 is provided on the plurality of Z-axis sliding blocks 8, and can move in the X-axis direction or the Z-axis direction along with the X-axis moving mechanism or the Z-axis moving mechanism, thereby adjusting the relative position of the back main shaft assembly 10 and the main spindle box 2.

The above embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by the technical solution of the present invention by those skilled in the art are all within the scope of the present invention as defined by the claims.

Claims (2)

1. The utility model provides a structure is prestretched in mechanical equipment lead screw assembly for mechanical numerical control lathe, its characterized in that: the pre-tensioning device comprises a screw rod and a pre-tensioning assembly, wherein the screw rod comprises an integrally formed screw rod body, a screw rod shaft and a screw rod nut which are respectively arranged at two ends of the screw rod body, the pre-tensioning assembly is arranged on the screw rod shaft, the pre-tensioning assembly comprises a bearing, a precision nut, a bearing seat, a spacing ring and a bearing gland, the bearing is installed and fixed in the bearing seat and penetrates through the screw rod shaft, a gap is reserved between the bearing and the end face of the screw rod body, the bearing gland is arranged on the end face of the bearing seat and is abutted to the surface of the bearing, the spacing ring penetrates through the bearing gland and is abutted to the surface of the bearing, and the precision nut is arranged at the outer end of.

2. The mechanical equipment screw rod assembling pre-tensioning structure according to claim 1, characterized in that: the gap distance is 1-2 mm.

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