CN213593327U

CN213593327U - Special tailstock center mechanism for large-scale circular engraving machine

Info

Publication number: CN213593327U
Application number: CN202022134619.5U
Authority: CN
Inventors: 马家功; 耿陶
Original assignee: Jiahe Intelligent Manufacturing Engineering Shandong Co ltd
Current assignee: Jiahe Intelligent Manufacturing Engineering Shandong Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-07-02
Anticipated expiration: 2030-09-25

Abstract

The utility model provides a special tailstock top mechanism of large-scale circular engraving machine, including tailstock exocoel and top, the inside of tailstock exocoel is provided with the center cover, the outside of tailstock exocoel is provided with the locking bolt, top grafting is in the one end of center cover, the front end of center cover is provided with the front end gland, be provided with the oil blanket between front end gland and the top, deep groove ball bearing has set gradually between top and the center cover, cylindrical roller bearing, tapered roller bearing and angular contact bearing, the other end of center cover is provided with the lead screw hole, be provided with the lead screw in the lead screw hole, be provided with screw nut and T type lock nut on the lead screw, be provided with rear end gland between T type lock nut and the tailstock exocoel, be provided with the bush between rear end gland and the tailstock exocoel, be provided with thrust ball bearing and oil blanket between bush and the tailstock exocoel. This device has higher tight ability in top, wearability, connection leakproofness and controllability, reasonable in design, simple structure, and the practicality is stronger, is fit for extensive the popularization.

Description

Special tailstock center mechanism for large-scale circular engraving machine

Technical Field

The utility model belongs to the technical field of the circular engraver equipment, especially, relate to a special tailstock top mechanism of large-scale circular engraver.

Background

The numerical control relief machine tool comprises a plane engraving machine and a circular engraving machine, and the circular engraving machine can perform spatial three-dimensional engraving on a workpiece. Large stone materials are generally subjected to three-dimensional carving by adopting a large circular carving machine. The tailstock for the large-scale circular engraving machine is used for clamping one end of a workpiece, and the tip can be over against the center of the workpiece so as to guarantee the circular engraving quality.

At present, a tailstock center is used as a clamping part of a circular engraving machine and plays a supporting and centering role for a workpiece together with a headstock. The existing tailstock adopts a sleeve telescopic structure, a centre shaft does not rotate, and a centre which is pressed against a centering hole on the end face of a workpiece does not rotate. Because the workpiece is tightly jacked by adopting a dead center structure, when a large-volume workpiece is clamped, the surface of a center and the inner surface of a center hole of the workpiece are seriously rubbed and damaged due to the workpiece, so that the quality of the circular engraving is reduced and even the workpiece is scrapped; moreover, the existing tailstock has insufficient sealing property and waterproofness near the tip end part, so that water is easily fed into the tailstock to influence the service life of the tip; moreover, the extension length of the tip on the tailstock is inconvenient to adjust.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the top technical problem who exists of foretell tailstock, provide a reasonable in design, simple structure, be convenient for adjust, bearing capacity is higher, leakproofness and waterproof nature are better and have the special tailstock top mechanism of large-scale circular engraving machine of gyration function.

In order to achieve the above object, the technical solution adopted by the present invention is that, the special tailstock center mechanism for large circular engraving machine provided by the present invention comprises a tailstock outer cavity, wherein a center is arranged inside the tailstock outer cavity, a center sleeve is arranged inside the tailstock outer cavity, a locking bolt penetrating through the side wall of the tailstock outer cavity and connected to the center sleeve is arranged outside the tailstock outer cavity, the center is inserted into one end of the center sleeve, the center comprises a first shaft shoulder, a second shaft shoulder and a third shaft shoulder which are sequentially distributed from front to back, a first step hole, a second step hole and a third step hole are sequentially arranged inside the center sleeve from front to back, a front end gland is arranged on the first shaft shoulder, the front end gland is pressed with the first step hole, the front end gland is provided with an oil seal groove distributed around the center on one side of the front end gland facing the center sleeve, an oil seal is arranged between the oil seal groove and the center, a deep groove ball bearing and a cylindrical roller bearing are arranged between the outer side of the second shaft shoulder and the first-order hole in parallel, a tapered roller bearing is arranged between the outer side of the third shaft shoulder and the second-order hole, two angular contact bearings are arranged between the tail end of the tip and the third-order hole, the other end of the center sleeve is provided with a screw nut which is arranged on a screw, one end of the screw is matched with a screw hole arranged at the center of the center sleeve, the other end of the screw rod is provided with a T-shaped locking nut which comprises a nut and an adjusting rod arranged on the side surface of the nut, a rear end gland is arranged between the T-shaped locking nut and the tailstock outer cavity, a bushing is arranged between the rear end gland and the tailstock outer cavity, and a thrust ball bearing is arranged between the bushing and the tailstock outer cavity, and an oil seal is arranged between the bushing and the rear end pressure cover.

Preferably, the adjusting rod comprises a first adjusting pipe and a second adjusting pipe which are connected in a rotating mode, the length of the first adjusting pipe is smaller than that of the second adjusting pipe, a connecting column is arranged on the inner thread of the first adjusting pipe, and the connecting column is fixedly arranged on the side face of the nut.

Preferably, the number of the locking bolts is two, the locking bolts are arranged on the outer cavity of the tailstock side by side, and the end parts of the locking bolts are provided with hexagonal grooves.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. the utility model provides a special tailstock top mechanism of large-scale circular engraving machine adopts the top that has the gyration function to effectively improve its top tight ability to the work piece, especially to large-scale work piece to the form that utilizes multi-stage bearing and oil blanket has effectively guaranteed the connection leakproofness between top and the tailstock exocoel, and this device adopts lead screw, screw nut and T type lock nut to adjust top and the position of apex cover simultaneously, and maneuverability is higher, and reasonable in design moreover, simple structure is fit for extensive the popularization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a sectional view of a tailstock center mechanism specially used for a large circular engraving machine provided in the embodiment;

FIG. 2 is an isometric view of a special tailstock center mechanism of the large circular engraving machine provided by the embodiment;

in the above figures, 1, a tailstock outer cavity; 2. a tip; 21. a first shoulder; 22. a second shoulder; 23. a third shoulder; 3. a tip sleeve; 31. a first-order hole; 32. a second-order hole; 33. a third-order hole; 4. locking the bolt; 5. a front end gland; 6. oil sealing; 7. a deep groove ball bearing; 8. a cylindrical roller bearing; 9. a tapered roller bearing; 10. an angular contact bearing; 11. a lead screw nut; 12. a lead screw; 13. a T-shaped lock nut; 131. a nut; 132. adjusting a rod; 132a, a first regulating tube; 132b, a second regulating tube; 133. connecting columns; 14. the rear end is pressed and covered; 15. a bushing; 16. a thrust ball bearing.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Embodiment, as shown in fig. 1 and fig. 2, the utility model provides a special tailstock top mechanism of large-scale circular engraving machine, including tailstock exocoel 1, the inside of tailstock exocoel 1 is provided with top 2. The tailstock outer cavity 1 is the prior art, and the description of this embodiment is omitted. Because top 2 has important effect in the circular engraving machine course of working, so the utility model discloses the focus is to top and tailstock exocoel's connection structure and regulation structure provide the improvement to guarantee top 2 high strength, high wear resistance, long-life and higher controllability in the circular engraving machine.

Specifically, the utility model is provided with a center sleeve 3 in the tailstock outer cavity 1, a locking bolt 4 penetrating through the side wall of the tailstock outer cavity 1 and connected to the center sleeve is arranged on the outer side of the tailstock outer cavity 1, a center 2 is inserted into one end of the center sleeve 3, the center 2 comprises a first shaft shoulder 21, a second shaft shoulder 22 and a third shaft shoulder 23 which are sequentially distributed from front to back, a first-order hole 31, a second-order hole 32 and a third-order hole 33 are sequentially arranged in the center sleeve 3 from front to back, a front end gland 5 is arranged on the first shaft shoulder 21, the front end gland 5 is pressed with the first-order hole 21, an oil seal groove distributed around the center is arranged on one side of the front end gland 5 facing the center sleeve, an oil seal 6 is arranged between the oil seal groove and the center, a deep groove ball bearing 7 and a cylindrical roller bearing 8 are arranged between the outer side of the second shaft shoulder 22 and the first-order hole side by side, a tapered roller bearing 9 is arranged between the outer side of, two angular contact bearings 10 are arranged between the tail end of the tip 2 and the third-order hole, a lead screw nut 11 is arranged at the other end of the tip sleeve 3, the lead screw nut 11 is arranged on the lead screw 12, one end of the lead screw 12 is matched with a lead screw hole arranged at the center of the tip sleeve, a T-shaped locking nut 13 is arranged at the other end of the lead screw, the T-shaped locking nut 13 comprises a nut 131 and an adjusting rod 132 arranged on the side face of the nut, a rear end gland 14 is arranged between the T-shaped locking nut 13 and the tailstock outer cavity 1, a bushing 15 is arranged between the rear end gland 14 and the tailstock outer cavity 1, a thrust ball bearing 16 is arranged between the bushing 15 and the tailstock outer cavity 1, and an oil seal is arranged between the bushing 15 and. The lead screw 12 can be rotated by rotating the T-shaped locking nut 13, so that the lead screw nut 11 can make linear motion on the lead screw 12, the center sleeve 3 and the center 2 move towards the front side of the tailstock outer cavity 1 under the transmission of the lead screw, and the position of the center sleeve in the tailstock outer cavity can be fixed by tightening the locking bolt 4, so that the extension length of the center 2 can be adjusted. The connecting end of the screw 12 and the tailstock outer cavity 1 is supported by a bushing 15, and a thrust ball bearing 16 provides thrust capability, which is beneficial to improving the rotation stability of the screw 12 and the connection reliability of the rear end gland. The T-shaped lock nut 13 is simple in structure, small in duty, strong in operability and high in practicability.

Furthermore, the centre 3 in the device does rotary motion in the centre sleeve 3, so that the friction of the centre in the process of jacking the workpiece can be effectively reduced, the service life of the centre can be prolonged, and the centre has stronger jacking capability particularly for large-size workpieces. A multi-stage bearing is arranged between the centre 2 and the centre sleeve 3 for rotational support, and different bearings have different bearing performances, for example, a deep groove ball bearing 7 has small friction coefficient and high limit rotation speed, mainly bears radial load and also can bear a certain amount of axial load, but because the radial force of the front end of the centre is larger and the central stability requirement of the front end of the centre is higher, the radial force of a workpiece acting on the centre can be effectively borne by the front end of the second shoulder arranged at the front end of the second shoulder, so that the stability of the front end of the centre is ensured; the internal structure of the cylindrical roller bearing 8 adopts rollers which are arranged in parallel, and space retainers or isolating blocks are arranged between the rollers, so that the inclination of the rollers or the mutual friction between the rollers can be prevented, and the increase of the rotating torque is effectively prevented; the tapered roller bearing 9 belongs to a separation type bearing, an inner ring and an outer ring of the tapered roller bearing are respectively provided with a tapered raceway, rollers of the tapered roller bearing 9 of the device adopt a single-row structure, can bear radial load and single-direction axial load, and when bearing the radial load, an axial component force can be generated and can be tightly pressed with an axial direction between a tip and a workpiece; the angular contact ball bearing 10 mainly bears large unidirectional axial load and radial load, can work at high rotating speed, and ensures the stability of the tip 2 in the process of high-speed rotation with a workpiece. Meanwhile, the multistage round holes and the multistage shaft shoulders arranged between the center 2 and the center sleeve 3 of the device can fully ensure the stability of corresponding bearing stations, and are favorable for prolonging the actual service life of the center. In addition, the device adopts the oil seals 6 between the screw 12 and the tailstock outer cavity 1 and between the tip 2 and the tailstock outer cavity 1, so that the connection sealing performance of the device can be fully improved, and the running performance of the device is improved.

In order to improve T type lock nut 13's practicality, the utility model provides an adjust pole 132 including rotating first control tube 132a and the second control tube 132b of connecting, first control tube 132 a's length is less than second control tube 132 b's length, and first control tube 132 a's internal thread is provided with spliced pole 133, and spliced pole 133 is fixed to be set up in the side of nut 131. This device will be shorter spliced pole 133 welding on the nut, and adjust pole 132 and adopt the assembled connection, can reduce T type lock nut 13's cost of scrapping like this, improve the top security of walking the in-process of tailstock through the angle that changes first control tube and second control tube moreover, and the practicality is stronger.

For top cover at the inside stability of tailstock exocoel, the utility model provides a locking bolt 4 is total two and set up side by side on tailstock exocoel 1, increases the locking node quantity to top cover 4, and locking bolt's tip is provided with the hexagonal groove in order to conveniently utilizing hexagonal spanner to relax or tighten it moreover.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. A tailstock center mechanism special for a large-scale circular engraving machine comprises a tailstock outer cavity, wherein a center is arranged inside the tailstock outer cavity, and is characterized in that a center sleeve is arranged inside the tailstock outer cavity, a locking bolt penetrating through the side wall of the tailstock outer cavity and connected to the center sleeve is arranged on the outer side of the tailstock outer cavity, the center is inserted into one end of the center sleeve, the center comprises a first shaft shoulder, a second shaft shoulder and a third shaft shoulder which are sequentially distributed from front to back, a first-step hole, a second-step hole and a third-step hole are sequentially arranged inside the center sleeve from front to back, a front end gland is arranged on the first shaft shoulder and is in press fit with the first-step hole, an oil seal groove distributed around the center is arranged on one side of the front end gland facing the center sleeve, an oil seal is arranged between the oil seal groove and the center, a deep groove ball bearing and a cylindrical roller bearing are arranged between the outer side of the second shaft shoulder and the first-step hole side by side, the novel tailstock structure comprises a third shaft shoulder, a second-order hole, a third shaft shoulder.

2. The special tailstock center mechanism for the large circular engraving machine as claimed in claim 1, wherein the adjusting rod comprises a first adjusting pipe and a second adjusting pipe which are rotatably connected, the length of the first adjusting pipe is smaller than that of the second adjusting pipe, a connecting column is arranged on the inner thread of the first adjusting pipe, and the connecting column is fixedly arranged on the side surface of the nut.

3. The special tailstock center mechanism for the large circular engraving machine as claimed in claim 2, wherein the locking bolts are arranged on the tailstock outer cavity side by side, and hexagonal grooves are formed in the end portions of the locking bolts.