CN212665801U

CN212665801U - Fine adjustment structure of grinding machine tailstock

Info

Publication number: CN212665801U
Application number: CN202020961381.0U
Authority: CN
Inventors: 曹宏波; 刘先榜
Original assignee: Hardinge Precision Machinery Jiaxing Co Ltd
Current assignee: Hardinge Precision Machinery Jiaxing Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-03-09
Anticipated expiration: 2030-05-29

Abstract

The utility model relates to a fine setting structure of grinding machine tailstock, tailstock upper portion and tailstock lower part are equipped with the upper portion cavity and the lower part cavity that link up respectively, and the hand wheel rotationally sets up tailstock upper portion, its characterized in that still includes the lead screw structure, and the lead screw structure includes lead screw, upper nut and lower nut, and the lead screw has the upper thread and the lower screw thread of upper thread below, and the upper thread is different with the helical pitch of lower screw thread, and the upper nut is fixed in the upper portion cavity on tailstock upper portion, and with the last screw-thread fit of lead screw, the lower nut is fixed in the lower part cavity of tailstock lower part, and with the lower screw-thread fit of lead screw, all has the ball between upper nut, lower nut and the lead screw, lead screw and hand wheel connection, and tailstock upper portion and tailstock lower part rotate relatively. The utility model realizes the change of the distance between the two nuts through the lead difference of the two nuts, and has high adjusting precision; the upper nut and the lower nut are in ball transmission with the screw rod, so that the adjustment is not laborious, the jamming cannot occur, and the operation is very convenient and fast.

Description

Fine adjustment structure of grinding machine tailstock

Technical Field

The utility model relates to the technical field of machine tools, especially a fine setting structure of grinding machine tailstock.

Background

A tailstock is usually installed on a rotary machine tool (such as a grinding machine, a lathe, etc.) to position a workpiece, and the tailstock is an important component of the machine tool and is provided with a tip for supporting the workpiece. In a grinding machine, a tailstock is usually arranged on one side of a workbench and is in slidable fit connection with the workbench, a spindle device is arranged on the other side of the workbench opposite to the tailstock, one end of a workpiece with a long axial length is clamped through the spindle device, and the other end of the workpiece is supported against the other end of the workpiece through a tip on a driving tailstock. The centre and the main shaft need to have strict coaxiality, and for different types of workpieces, the positioning of a common tailstock is often difficult to ensure the accuracy, and the stability of the coaxiality is difficult to ensure. In order to ensure that the tip can accurately position different workpieces, a mandrel taper fine adjustment mechanism is arranged on the tailstock in production so as to adjust the specific position of the tip. Current dabber tapering fine-tuning, including hand wheel, screw rod and nut, the hand wheel rotationally installs on tailstock upper portion and is connected with the screw rod, nut fixed mounting in the tailstock lower part and with the screw rod cooperation, drive the screw rod through rotatory hand wheel and rotate the position that changes the nut on the screw rod to change the gap size between tailstock upper portion and the lower part, thereby reach the fine setting dabber tapering, but this structure is twisted and is moved the screw rod and make its rotation very hard, and adjusts the precision deviation big.

Disclosure of Invention

In order to solve the problem, the utility model provides a fine setting structure of grinding machine tailstock to reduce the dynamics that needs when adjusting and improve and adjust the precision.

In order to achieve the above object, the present invention provides a fine adjustment structure for a grinder tailstock, the tailstock is provided with a through hole and a gap, the gap is arranged on one side of the through hole and communicated with the through hole, the tailstock comprises a tailstock upper portion and a tailstock lower portion, the gap is arranged on one side of the through hole to separate the tailstock upper portion and the tailstock lower portion, the tailstock upper portion and the tailstock lower portion are respectively provided with an upper cavity and a lower cavity which are communicated, and a hand wheel is rotatably arranged on the tailstock upper portion, the fine adjustment structure is characterized by further comprising a lead screw structure, the lead screw structure comprises a lead screw, an upper nut and a lower nut, the lead screw is provided with an upper thread and a lower thread below the upper thread, the upper thread is different from the lower thread in lead, the upper nut is fixed in the upper cavity of the tailstock upper portion and matched with the upper thread of the lead screw, the lower nut is fixed in the lower cavity, balls are arranged between the upper nut and the screw rod and between the lower nut and the screw rod, and the screw rod is connected with the hand wheel and can rotate relative to the upper part of the tailstock and the lower part of the tailstock.

The utility model provides a fine setting structure of grinding machine tailstock, lead screw and hand wheel connection, with different lead screw thread matched with upper nut and lower nut on the lead screw fix respectively on tailstock upper portion and tailstock lower part, twist the hand wheel, the distance between upper nut and the lower nut has changed, namely the size in gap has changed, thereby realized the tapering fine setting of dabber, realize the change of two nut distances through the lead difference of two nuts, the regulation precision is high; through ball transmission between the upper nut and the lower nut and the screw rod, manual rotation is very easy, clamping is avoided, adjustment is not easy, and operation is convenient and fast.

Drawings

FIG. 1 is a schematic structural diagram of a tailstock of a grinding machine;

FIG. 2 is a right side view of the tailstock of the grinding machine of FIG. 1;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

fig. 4 is a cross-sectional view of a lead screw configuration.

The present invention will be described in further detail with reference to the accompanying drawings.

Detailed Description

Referring to fig. 1 and 2, the tailstock is provided with a through hole 13 and a slit 14, and the slit 14 is arranged on one side of the through hole 13 and is communicated with the through hole 13. The tailstock comprises a tailstock upper part 11 and a tailstock lower part 12, wherein the tailstock upper part 11 and the tailstock lower part 12 are separated by a gap 14 on one side of a through hole 13, and the tailstock upper part 11 and the tailstock lower part 12 are connected together on the other side of the through hole 13. The center 10 is arranged on the upper part 11 of the tailstock, and the position of the center 10 can be adjusted by adjusting the size of the gap 14 through a lead screw structure, so that the fine adjustment of the taper of the mandrel is realized.

Referring to fig. 3 and 4, the lead screw structure includes a lead screw 40, an upper nut 41 and a lower nut 42, the lead screw 40 has two threads: an upper thread and a lower thread, the lower thread being below the upper thread, the upper thread and the lower thread having different leads, the two threads being separated from each other by a distance in the middle of the lead screw 40. The lead screw 40 is screwed into an upper nut 41 and a lower nut 42, the upper nut 41 is engaged with the upper thread of the lead screw 40, the lower nut 42 is engaged with the lower thread of the lead screw 40, and the lead screw 40 is rotatable relative to the upper nut 41 and the lower nut 42. Balls are arranged between the screw 40 and the upper nut 41 and between the screw 40 and the lower nut 42. The upper tailstock 11 and the lower tailstock 12 are respectively provided with a through upper cavity and a through lower cavity, the upper bushing 5 is fixed at the upper end part of the upper cavity through a screw, the upper nut 41 is arranged in the upper cavity, the outer wall of the upper nut 41 is provided with an upper shaft shoulder, and the upper bushing 5 is pressed on the upper shaft shoulder of the upper nut 41. The lower nut 42 is arranged in the lower cavity, the lower bushing 6 is fixed at the lower end part of the lower cavity through a screw, a lower shaft shoulder is arranged on the outer wall of the lower nut 42, and the lower bushing 6 is pressed on the lower shaft shoulder of the lower nut 42. The lower end of the lower nut 42 extends out of the lower bushing 6 and is connected with a fixing ring 7, and the fixing ring 7 is fixedly arranged on the lower part 12 of the tailstock. The upper nut 41 is fixed in the upper cavity, the lower nut 42 is fixed in the lower cavity, the upper nut 41 and the lower nut 42 cannot do vertical movement and rotary movement through the matching of the upper nut 41 and the upper bushing 5 and the matching of the lower nut 42, the lower bushing 6 and the fixing ring 7, the work is reliable, and the installation and the disassembly are very convenient.

The fixing seat 9 is fixedly arranged on the tailstock upper part 11, and above the upper bushing 5, the middle part of the fixing seat 9 is provided with a through hole, and the bearing 8 is arranged in the through hole. The hand wheel shaft 3 is arranged on a bearing 8 and can rotate relative to the fixed seat 9 and the tailstock upper part 11. The upper end of the hand wheel shaft 3 is connected with the hand wheel 2 on the upper part 11 of the tailstock through a screw, and the lower end is connected with the screw rod 40 through a screw. The hand wheel shaft 3 connects the hand wheel 2 and the lead screw 40 together, and is rotatable with respect to the tailstock upper portion 11 and the tailstock lower portion 12 together with the hand wheel 2 and the lead screw 40. The hand wheel 2 is screwed manually, the hand wheel 2 drives the screw rod 40 with the lead difference to rotate, the upper nut 41 and the lower nut 42 cannot do up-down movement and rotation movement, the screw rod 40 rotates relative to the upper nut 41 and the lower nut 42, so that the distance between the upper nut 41 and the lower nut 42 is changed, namely the size of the gap 14 is changed, the fine adjustment of the taper of the mandrel is realized, the change of the distance between the two nuts is realized through the lead difference of the two nuts, and the adjustment precision is high. The relative rotation between the screw 40 and the upper nut 41 and between the screw 40 and the lower nut 42 is transmitted by the ball bearings, the manual rotation is very easy and the jamming is not generated.

Claims

1. The fine adjustment structure of the grinder tailstock is characterized by further comprising a lead screw structure, wherein the lead screw structure comprises a lead screw, an upper nut and a lower nut, the lead screw is provided with an upper thread and a lower thread below the upper thread, the upper thread is different from the lead of the lower thread, the upper nut is fixed in the upper cavity of the upper part of the tailstock and is matched with the upper thread of the lead screw, the lower nut is fixed in the lower cavity of the lower part of the tailstock and is matched with the lower thread of the lead screw, and the upper nut and the lead screw are communicated with each other, The lower nut and the screw rod are provided with balls, and the screw rod is connected with the hand wheel and can rotate relative to the upper part of the tailstock and the lower part of the tailstock.

2. The fine adjustment structure for the tailstock of a grinding machine as claimed in claim 1, further comprising a hand wheel shaft rotatably arranged at the upper part of the tailstock, wherein the upper end of the hand wheel shaft is connected with the hand wheel, and the lower end of the hand wheel shaft is connected with the screw rod.

3. The fine adjustment structure for the tailstock of a grinding machine as claimed in claim 2, characterized in that an upper bushing is fixed at the upper end of the upper cavity of the upper part of the tailstock, the upper nut is provided with an upper shaft shoulder, and the upper bushing presses on the upper shaft shoulder.

4. The fine adjustment structure of the tailstock of a grinding machine as claimed in claim 3, characterized in that a lower bushing is fixed at the lower end of the lower cavity of the lower part of the tailstock, and the lower nut has a lower shoulder on which the lower bushing presses.

5. The fine tuning structure of the tailstock of a grinding machine as claimed in claim 4, characterized in that the tailstock is provided with a fixed seat at the upper part, and the screw rod is rotatably mounted on the fixed seat through a bearing.

6. The fine adjustment structure of the tailstock of a grinding machine as claimed in claim 5, characterized in that the lower end of the lower nut extends out of the lower bushing and is connected with a fixing ring, and the fixing ring is mounted at the lower part of the tailstock.