A tailstock center device with fine adjustment function

Abstract

The present invention discloses a tailstock center device with a fine-tuning function, including a seat body, a mandrel for center installation, and a fine-tuning mechanism for radial deflection of the mandrel. The mandrel is inserted into the seat body, the fine-tuning mechanism is arranged on the seat body, and the fine-tuning mechanism is connected to the mandrel in a transmission manner. The present invention is provided with a fine-tuning mechanism for radial deflection of the mandrel. The fine-tuning shaft of the fine-tuning mechanism drives the radial deflection of the mandrel through a fine-tuning deflection member. One end of the fine-tuning deflection member is arranged on the mandrel, and the other end is arranged in the annular groove of the fine-tuning shaft. The fine-tuning deflection member abuts against the side wall of the annular groove, and the mandrel is driven to move through such cooperation. The abutting surface between the fine-tuning deflection member and the side wall of the annular groove is an arc surface. The contact point between the fine-tuning deflection member and the side wall of the annular groove will adaptively move up and down with the axial movement of the fine-tuning shaft, thereby driving the radial deflection of the mandrel. The present invention does not need to deflect the entire device to achieve the deflection of the mandrel. The operation is simple, the adjustment error is small and the precision is high, thereby ensuring a high precision and ensuring the processing accuracy of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of processing machinery, in particular to a tailstock center device with a fine-tuning function. Background Art

[0002] In the processing of various precision workpieces, in order to ensure the accuracy and coaxiality of the workpiece, a center is installed on the tailstock of the machine tool to support the workpiece. The application of the center is very extensive. On the one hand, it supports the workpiece, and on the other hand, it serves as a reference positioning. It is an indispensable auxiliary tool in lathe processing.

[0003] When grinding high-precision external cylindrical surfaces, the center axes of the two centers are required to be parallel to the movement of the worktable. When the parallelism of the center axes of the two centers to the movement of the worktable changes, it is necessary to adjust the runout of the center axes of the two centers to eliminate the parallelism error. However, this can only be achieved by adjusting the runout of the mounting table of the tailstock center device. The operation is cumbersome, the adjustment error is large, and the precision is low, which leads to inaccurate workpiece processing. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a tailstock center device with a fine-tuning function.

[0005] The present invention discloses a tailstock center device with fine adjustment function, comprising:

[0006] seat body;

[0007] A mandrel, which passes through the seat body and is used for installing the top; and

[0008] The fine-tuning mechanism is arranged on the seat body, the fine-tuning mechanism is drivingly connected with the core shaft, and the fine-tuning mechanism is used for the radial deflection of the core shaft.

[0009] According to one embodiment of the present invention, the fine-tuning mechanism includes a fine-tuning shaft and a fine-tuning device, the fine-tuning shaft is passed through the seat body, the fine-tuning device is arranged on the seat body, one end of the fine-tuning shaft extends toward the core shaft, the fine-tuning device is transmission connected to the end of the fine-tuning shaft away from the core shaft, and the end of the fine-tuning shaft close to the core shaft is transmission connected to the core shaft.

[0010] According to one embodiment of the present invention, the fine-tuning shaft and the core shaft are perpendicular to each other, the fine-tuning device drives the fine-tuning shaft to move axially, and the axial movement of the fine-tuning shaft drives the core shaft to deflect radially.

[0011] According to one embodiment of the present invention, the fine-tuning mechanism also includes a fine-tuning deflection member, one end of which is arranged on the core shaft, and the other end of which is abutted against the fine-tuning shaft, and the abutting surface between the fine-tuning deflection member and the fine-tuning shaft is a circular arc surface.

[0012] According to one embodiment of the present invention, the core shaft is provided with a mounting groove near the fine-tuning shaft, the fine-tuning shaft is provided with an annular groove near the core shaft, one end of the fine-tuning deflection member is arranged in the mounting groove, the other end of the fine-tuning deflection member is arranged in the annular groove, the fine-tuning deflection member is abutted against the side wall of the annular groove, and the arc surface is arranged on the side of the fine-tuning deflection member facing the side wall of the annular groove.

[0013] According to one embodiment of the present invention, the fine-tuning device includes a fine-tuning knob seat and a fine-tuning knob, the fine-tuning knob seat is arranged on the seat body, the fine-tuning knob is rotatably arranged on the fine-tuning knob seat, and the end of the fine-tuning shaft away from the core shaft is connected to the fine-tuning knob and is threadedly connected to the fine-tuning knob seat.

[0014] According to one embodiment of the present invention, the fine-tuning mechanism also includes a fine-tuning shaft clamping device, which is arranged on the seat body, connected to the end of the fine-tuning shaft close to the core shaft, and is used to apply a clamping force to the fine-tuning shaft.

[0015] According to one embodiment of the present invention, the fine-tuning mechanism includes a fine-tuning shaft clamping base and a fine-tuning shaft clamping elastic member, the fine-tuning shaft clamping base is arranged on the seat body, one end of the fine-tuning shaft clamping elastic member is against the fine-tuning shaft clamping base, and the other end of the fine-tuning shaft clamping elastic member is against the end of the fine-tuning shaft close to the core shaft.

[0016] According to one embodiment of the present invention, an axial adjustment mechanism is further included. The axial adjustment mechanism is arranged on the seat body, the axial adjustment mechanism is transmission-connected to the core shaft, and the axial adjustment mechanism is used for axial movement of the core shaft.

[0017] According to one embodiment of the present invention, the axial adjustment mechanism includes an axial adjustment transmission member and an axial adjustment device. The axial adjustment transmission member is arranged in the seat body and is transmission-connected to the core shaft. The axial adjustment device is transmission-connected to the axial adjustment transmission member. The axial adjustment device drives the core shaft to move axially through the axial adjustment transmission member.

[0018] Compared with the prior art, the tailstock center device with fine adjustment function of the present invention has the following advantages:

[0019] The tailstock center device with fine-tuning function of the present invention is provided with a fine-tuning mechanism for radial deflection of the core shaft. The fine-tuning shaft of the fine-tuning mechanism drives the radial deflection of the core shaft through a fine-tuning deflection member. One end of the fine-tuning deflection member is arranged on the core shaft, and the other end is arranged in the annular groove of the fine-tuning shaft. The fine-tuning deflection member abuts against the side wall of the annular groove, and the core shaft is driven to move through such cooperation. The abutting surface between the fine-tuning deflection member and the side wall of the annular groove is an arc surface. The contact point between the fine-tuning deflection member and the side wall of the annular groove will adaptively move up and down with the axial movement of the fine-tuning shaft, thereby driving the radial deflection of the core shaft. The present invention realizes the deflection of the core shaft without the need to deflect the entire device. The operation is simple, the adjustment error is small and the accuracy is high, thereby ensuring a high precision and ensuring the processing accuracy of the workpiece.

[0020] In addition, the present invention is also provided with an axial adjustment mechanism, through which the position of the core shaft is adjusted to adapt to workpieces of different lengths, and there is no need to move the entire device, the operation is simple, and the processing accuracy of the workpiece is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is a partial structural exploded view of the tailstock center device with fine adjustment function in the embodiment;

[0023] Figure 2 It is a structural schematic diagram of the tailstock center device with fine adjustment function in the embodiment;

[0024] Figure 3 A top view of a tailstock center device with a fine-tuning function in an embodiment;

[0025] Figure 4 for Figure 3 Structural cross-sectional view of the P1-P1 plane;

[0026] Figure 5 for Figure 3 Structural cross-sectional view of the P2-P2 plane;

[0027] Figure 6 for Figure 4 Enlarged view of area A in the middle.

[0028] Figure 7 for Figure 4 Enlarged view of area B in the middle.

[0029] Figure 8 It is a structural schematic diagram of the mandrel in the embodiment;

[0030] Fig. 9It is a structural schematic diagram of the fine-tuning deflection member in the embodiment;

[0031] Fig.10 A schematic diagram of the structure of the axial adjustment control member in the embodiment.

[0032] Description of reference numerals:

[0033] Seat body 1; spindle mounting hole 11; spindle sleeve 111; spindle guide sleeve 112; spindle sleeve limiter 113; fine-tuning shaft mounting hole 12; mounting cavity 13; spindle 2; top mounting hole 21; mounting groove 22; tooth 23; preload elastic member mounting hole 24; fine-tuning mechanism 3; fine-tuning shaft 31; ring stage 311; ring groove 312; fine-tuning device 32; fine-tuning knob seat 321; convex ring 3211; fine-tuning knob 322; fine-tuning deflection member 33; mounting portion 331; deflection portion 332; arc surface 3321; fine-tuning shaft preload device 34; fine-tuning shaft preload base 341; fine-tuning shaft preload elastic member 34 2; axial adjustment mechanism 4; axial adjustment transmission member 41; axial adjustment device 42; axial adjustment base 421; barrel 4211; mounting ring 4212; bearing 4213; axial adjustment control member 422; transmission part 4221; manual control part 4222; handle rod 4223; limiting part 4224; limiting groove 4225; limiting nut 4226; limiting screw 4227; first sealing cover 5; spindle pre-tightening device 6; spindle pre-tightening spacer 61; spacer inner spacer ring 611; spacer flange 612; spindle pre-tightening flange 62; flange screw head 63; adjustment hole 631; spindle pre-tightening elastic member 64. DETAILED DESCRIPTION

[0034] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0035] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] See also Figure 1-2 A tailstock center device with fine-tuning function includes a seat body 1, a core shaft 2 for center installation and a fine-tuning mechanism 3 for radial deflection of the core shaft 2. The core shaft 2 is passed through the seat body 1, the fine-tuning mechanism 3 is arranged on the seat body 1, and the fine-tuning mechanism 3 is connected to the core shaft 2 in a transmission manner.

[0037] See also Figure 1-5 The seat body 1 is provided with a spindle mounting hole 11, which passes through the seat body 1 horizontally; two spindle sleeves 111 are provided in the spindle mounting hole 11, and spindle guide sleeves 112 are respectively provided in the spindle sleeves 111, and the spindle 2 is passed through the spindle guide sleeves 112, and the spindle 2 and the spindle guide sleeves 112 are overfitted. In addition, a spindle sleeve limiting piece 113 is provided between the two spindle sleeves 111, and the two ends of the spindle sleeve limiting piece 113 are respectively against the ends of the spindle sleeves 111 to determine the relative position between the two spindle sleeves 111.

[0038] A top mounting hole 21 is provided at one end of the core shaft 2, and a first sealing cover 5 and a core shaft pre-tightening device 6 are provided on the base body 1. The first sealing cover 5 closes the end of the core shaft mounting hole 11 close to the top mounting hole 21, and the core shaft pre-tightening device 6 closes the end of the core shaft mounting hole 11 away from the top mounting hole 21. The end of the core shaft 2 close to the top mounting hole 21 extends out through the first sealing cover 5, and the end of the core shaft 2 away from the top mounting hole 21 is arranged in the core shaft pre-tightening device 6.

[0039] See also Figure 1 , 4 , 6 and 7, the fine-tuning mechanism 3 includes a fine-tuning shaft 31 and a fine-tuning device 32. The fine-tuning shaft 31 is passed through the seat body 1 and is transmission-connected to the core shaft 2. The fine-tuning device 32 is disposed on the seat body 1 and is transmission-connected to the end of the fine-tuning shaft 31 away from the core shaft 2. The fine-tuning device 32 drives the fine-tuning shaft 31 to move axially, and the axial movement of the fine-tuning shaft 31 drives the core shaft 2 to deflect radially.

[0040] The seat body 1 is provided with a fine-tuning shaft mounting hole 12 which horizontally penetrates the seat body 1 , and the fine-tuning shaft mounting hole 12 and the core shaft mounting hole 11 are perpendicular to each other and communicate with each other, and the fine-tuning shaft 31 is penetrated in the fine-tuning shaft mounting hole 12 .

[0041] The fine-tuning device 32 includes a fine-tuning knob seat 321 and a fine-tuning knob 322. The fine-tuning knob seat 321 is fixed on the seat body 1, and the fine-tuning knob 322 is rotatably set on the fine-tuning knob seat 321. The end of the fine-tuning shaft 31 away from the core shaft 2 is connected to the fine-tuning knob 322 and is threadedly connected to the fine-tuning knob seat 321. When the fine-tuning knob 322 is rotated, the fine-tuning shaft 31 is driven to rotate, and the axial movement of the fine-tuning shaft 31 is realized through the threaded cooperation between the fine-tuning shaft 31 and the fine-tuning knob seat 321.

[0042] See also Figure 4 and 6 The inner bottom wall of the fine-tuning knob 322 can be abutted against the end face of the fine-tuning knob seat 321, and a ring stage 311 is provided at the end of the fine-tuning shaft 31 close to the fine-tuning knob seat 321. The fine-tuning knob seat 321 is provided with a convex ring 3211, which extends into the fine-tuning shaft mounting hole 12 and can be abutted against the ring stage 311. The axial movement range of the fine-tuning shaft 31 is limited by the cooperation between the inner bottom wall of the fine-tuning knob 322 and the end face of the fine-tuning knob seat 321, and the cooperation between the convex ring 3211 and the ring stage 311.

[0043] See also Figure 4 and Figure 7-9 The fine-tuning shaft 31 is connected to the core shaft 2 through the fine-tuning deflection member 33, and the fine-tuning deflection member 33 is installed on the core shaft 2 by screws. The fine-tuning deflection member 33 includes a mounting portion 331 and a deflection portion 332, and the mounting portion 331 is arranged on the deflection portion 332; the core shaft 2 is provided with a mounting groove 22 on the side facing the fine-tuning shaft 31, and the fine-tuning shaft 31 is provided with an annular groove 312 corresponding to the mounting groove 22, the mounting portion 331 is arranged in the mounting groove 22, and the deflection portion 332 is arranged in the annular groove 312.

[0044] Furthermore, the deflection part 332 abuts against the side wall of the annular groove 312, and the abutment surface between the deflection part 332 and the side wall of the annular groove 312 is an arc surface 3321. When the fine-tuning shaft 31 moves axially, through the cooperation of the arc surface 3321 and the side wall of the annular groove 312, the contact point between the fine-tuning deflection part 33 and the side wall of the annular groove 312 will adaptively move up and down with the axial movement of the fine-tuning shaft 31, driving the deflection part 332 to perform a deflection action in the annular groove 312, and then driving the core shaft 2 to deflect axially. The deflection of the core shaft 2 is achieved without deflecting the entire device, the operation is simple, the adjustment error is small and the accuracy is high, thereby ensuring a high precision and ensuring the processing accuracy of the workpiece.

[0045] Preferably, the fine-tuning device 32 further includes a fine-tuning shaft pre-tightening device 34 for applying a pressing force to the fine-tuning shaft 31. Figure 1 and4 The fine-tuning shaft pre-tightening device 34 includes a fine-tuning shaft pre-tightening base 341 and a fine-tuning shaft pre-tightening elastic member 342. The fine-tuning shaft pre-tightening base 341 is fixed on the seat body 1. One end of the fine-tuning shaft pre-tightening elastic member 342 abuts against the fine-tuning shaft pre-tightening base 341, and the other end of the fine-tuning shaft pre-tightening elastic member 342 abuts against the end of the fine-tuning shaft 31 close to the core shaft 2. The fine-tuning shaft pre-tightening elastic member 342 is a spring.

[0046] See also Figure 1 and 4 This embodiment also includes an axial adjustment mechanism 4, which is arranged on the seat body 1 and is transmission-connected to the core shaft 2. The axial adjustment mechanism 4 is used to adjust the axial movement of the core shaft 2.

[0047] The axial adjustment mechanism 4 includes an axial adjustment transmission member 41 and an axial adjustment device 42. The axial adjustment transmission member 41 is arranged in the seat body 1 and is in transmission connection with the core shaft 2. The axial adjustment device 42 is arranged in the seat body 1 and is in transmission connection with the axial adjustment transmission member 41. The axial adjustment device 42 drives the core shaft 2 to move axially through the axial adjustment transmission member 41. The position of the core shaft 2 is adjusted through the axial adjustment mechanism 4 to adapt to workpieces of different lengths. There is no need to move the entire device, which is simple to operate and further improves the processing accuracy of the workpiece.

[0048] The seat body 1 is provided with a mounting cavity 13 with an opening facing upward, and the core shaft mounting hole 11 and the fine-tuning shaft mounting hole 12 are perpendicular to the mounting cavity 13 , and the mounting cavity 13 is communicated with the core shaft mounting hole 11 .

[0049] See also Figure 1 and 10 The axial adjustment device 42 includes an axial adjustment base 421 and an axial adjustment control member 422 rotatably arranged on the axial adjustment base 421. The axial adjustment base 421 includes a barrel 4211 and a mounting ring 4212 arranged outside the barrel 4211. The barrel 4211 is arranged on the opening of the mounting cavity 13, and one end of the barrel 4211 extends into the mounting cavity 13. The mounting ring 4212 is mounted on the seat body 1 and fixed to the seat body 1 by screws. The axial adjustment control member 422 includes a transmission part 4221 and a manual control part 4222 arranged on the transmission part 4221. The manual control part 4222 is rotatably arranged on the barrel 4211, and the transmission part 4221 extends into the mounting cavity 13 through the barrel 4211.

[0050] The axial adjustment transmission member 41 is arranged in the installation cavity 13 and is fixedly connected to the end of the transmission part 4221. When the manual control part 4222 rotates, the transmission part 4221 is driven to rotate, and then the axial adjustment transmission member 41 is driven to rotate. The axial adjustment transmission member 41 is a gear, and teeth 23 are provided on the side of the core shaft 2 facing the installation cavity 13. The axial adjustment control member 422 meshes with the teeth 23 to realize the transmission connection between the axial adjustment control member 422 and the core shaft 2. Among them, the length of the fine-tuning deflection member 33 corresponds to the length of the teeth 23.

[0051] In addition, a bearing 4213 for supporting the transmission part 4221 is provided in the barrel 4211, and the transmission part 4221 is inserted in the bearing 4213; a handle bar 4223 is also provided on the manual part 4222, which is convenient for the staff to adjust. A limiting part 4224 is also provided between the manual part 4222 and the transmission part 4221, and a limiting nut 4226 is provided in the limiting part 4224, and a limiting groove 4225 is provided on the outer side of the limiting part 4224. A limiting screw 4227 is fixed on the barrel 4211, and its end extends into the limiting groove 4225 and is connected to the limiting nut 4226, thereby limiting the axial adjustment range of the core shaft 2.

[0052] See also Figure 1 and 5 The spindle pre-tightening device 6 in this embodiment includes a spindle pre-tightening sleeve 61, a spindle pre-tightening flange 62 and a flange screw head 63. The spindle pre-tightening sleeve 61 is installed on the seat body 1 and closes the end of the spindle mounting hole 11 away from the top mounting hole 21. The spindle pre-tightening flange 62 is fixed on the end of the spindle pre-tightening sleeve 61, and the flange screw head 63 is screwed on the spindle pre-tightening flange 62.

[0053] A spacer ring 611 is provided inside the mandrel preload spacer 61 near the seat body 1, a spacer flange 612 is provided in the middle of the mandrel preload spacer 61, and the end of the mandrel 2 away from the top mounting hole 21 passes through the spacer ring 611 and is connected to the spacer flange 612. A mandrel preload elastic member 64 mounting hole 24 is provided at the end of the mandrel 2 away from the top mounting hole 21, one end of the mandrel preload elastic member 64 is arranged in the mandrel preload elastic member 64 mounting hole 24, and the other end is arranged in the flange screw head 63. The mandrel preload elastic member 64 is a spring, and the compression amount of the mandrel preload elastic member 64 can be adjusted by rotating the flange screw head 63; an adjustment hole 631 is provided on the flange screw head 63, so that the staff can use a tool to adjust the flange screw head 63, and the adjustment hole 631 in this embodiment is preferably a hexagonal hole.

[0054] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A tailstock center device with fine-tuning function, characterized in that: include: seat body; A mandrel, which passes through the seat body and is used for installing the top; and A fine-tuning mechanism is arranged on the seat body, the fine-tuning mechanism is drivingly connected with the mandrel, and the fine-tuning mechanism is used for radial deflection of the mandrel; The fine-tuning mechanism comprises a fine-tuning shaft and a fine-tuning device, wherein the fine-tuning shaft is passed through the seat body, the fine-tuning device is arranged on the seat body, one end of the fine-tuning shaft extends toward the mandrel, the fine-tuning device is in transmission connection with the end of the fine-tuning shaft away from the mandrel, and the end of the fine-tuning shaft close to the mandrel is in transmission connection with the mandrel; The fine-tuning shaft and the core shaft are perpendicular to each other, the fine-tuning device drives the fine-tuning shaft to move axially, and the axial movement of the fine-tuning shaft drives the core shaft to deflect radially; The fine-tuning mechanism further comprises a fine-tuning deflection member, which is mounted on the core shaft by means of screws, one end of the fine-tuning deflection member is arranged on the core shaft, the other end of the fine-tuning deflection member abuts against the fine-tuning shaft, and the abutting surface between the fine-tuning deflection member and the fine-tuning shaft is an arc surface; The mandrel is provided with a mounting groove near the fine-tuning shaft, the fine-tuning shaft is provided with an annular groove near the mandrel, one end of the fine-tuning deflection member is arranged in the mounting groove, the other end of the fine-tuning deflection member is arranged in the annular groove, the fine-tuning deflection member abuts against the side wall of the annular groove, and the arc surface is arranged on the side of the fine-tuning deflection member facing the side wall of the annular groove; The fine-tuning mechanism also includes a fine-tuning shaft pre-tightening device, which is arranged on the seat body and connected to the end of the fine-tuning shaft close to the core shaft, and is used to apply a pressing force to the fine-tuning shaft; The fine-tuning shaft pre-tightening device includes a fine-tuning shaft pre-tightening base and a fine-tuning shaft pre-tightening elastic member, wherein the fine-tuning shaft pre-tightening base is arranged on the base body, one end of the fine-tuning shaft pre-tightening elastic member abuts against the fine-tuning shaft pre-tightening base, and the other end of the fine-tuning shaft pre-tightening elastic member abuts against the end of the fine-tuning shaft close to the core shaft.

2. The tailstock center device with fine adjustment function according to claim 1 is characterized in that: The fine-tuning device comprises a fine-tuning knob seat and a fine-tuning knob, wherein the fine-tuning knob seat is arranged on the seat body, the fine-tuning knob is rotatably arranged on the fine-tuning knob seat, and the end of the fine-tuning shaft away from the core shaft is connected to the fine-tuning knob and is threadedly connected to the fine-tuning knob seat.

3. The tailstock center device with fine adjustment function according to claim 1 is characterized in that: It also includes an axial adjustment mechanism, which is arranged on the seat body, the axial adjustment mechanism is transmission-connected with the core shaft, and is used for axial movement of the core shaft.

4. The tailstock center device with fine adjustment function according to claim 3 is characterized in that: The axial adjustment mechanism includes an axial adjustment transmission member and an axial adjustment device. The axial adjustment transmission member is arranged in the seat body and is transmission-connected to the core shaft. The axial adjustment device is transmission-connected to the axial adjustment transmission member. The axial adjustment device drives the core shaft to move axially through the axial adjustment transmission member.

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