CN210305786U

CN210305786U - Automatic driving device for tail seat mandrel of machine tool

Info

Publication number: CN210305786U
Application number: CN201921004769.5U
Authority: CN
Inventors: 闫宏超; 夏科军; 鄢明亮; 于海阔
Original assignee: Hardinge Precision Machinery Jiaxing Co Ltd
Current assignee: Hardinge Precision Machinery Jiaxing Co Ltd
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2020-04-14
Anticipated expiration: 2029-06-29

Abstract

The utility model relates to an automatic driving device for a tailstock mandrel of a machine tool, wherein the tailstock body is provided with a driving installation hole communicated with the front end of the tailstock body, the mandrel is movably arranged in the driving installation hole, a screw rod is in threaded connection with the tailstock body, coaxial with the mandrel and provided with a shaft shoulder, the inner end of the screw rod is arranged in the spring mounting hole, the driving spring is arranged in the spring mounting hole, its both ends are pressed respectively on the diapire in the spring mounting hole and the shaft shoulder of screw rod, its characterized in that still includes first connecting rod, movable guide bar and cylinder, and the rear end of dabber is connected to first connecting rod, and the movably setting of movable guide bar is on the tailstock body, has to the convex drive of first connecting rod one side and keeps off the shoulder, and the drive keeps off the shoulder in the place ahead of first connecting rod, and first connecting rod can support to lean on and keep off the shoulder, and the cylinder is installed on the tailstock body, and its piston rod is connected with movable guide bar. The utility model discloses a drive spring provides the top to the dabber and leans on power, has the top and leans on power output process soft and have the advantage of inhaling the shake.

Description

Automatic driving device for tail seat mandrel of machine tool

Technical Field

The utility model belongs to the technical field of the machine tool part, especially a lathe tailstock dabber automatic drive device.

Background

A tailstock, which is an important component and on which a tip for supporting a workpiece against the tailstock and a spindle for supporting and driving the tip are mounted, is generally installed on a rotary machine tool (such as a grinding machine, a lathe, etc.) to position 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 driven through a spindle on the tailstock, so that the other end of the workpiece is supported by a spindle driving center.

In the prior art, a single manual lever or hydraulic driving mode is usually adopted to drive the mandrel, and for supporting light and small workpieces, the manual lever or hydraulic driving force is too large, so that certain power waste exists, and meanwhile, the workpieces are deformed due to excessive abutting, and the processing of the workpieces is not facilitated.

The previous chinese patent (application No. 201820974070.0) of the present applicant proposes a tailstock of a machine tool with a center driving and adjusting device, and discloses a technical scheme for driving a tailstock mandrel by using elastic force formed by spring compression, which can provide a proper abutting force when supporting a light and small workpiece, but has a space for further development in the mechanism of mandrel retraction.

Disclosure of Invention

In order to solve the problem, the utility model provides a lathe tailstock dabber drive arrangement to make the top of dabber lean on power output more level and smooth, and optimize the dabber and return the design.

In order to achieve the above object, the present invention provides an automatic driving device for a tailstock core shaft of a machine tool, comprising a tailstock body, a core shaft, a screw rod, a driving spring, wherein the tailstock body is provided with a driving installation hole communicated with the front end of the tailstock body, the core shaft is movably arranged in the driving installation hole, the front end and the rear end of the core shaft extend out of the driving installation hole, the front section and the rear section of the core shaft are respectively provided with a top installation hole and a spring installation hole which are communicated, the screw rod is in threaded connection with the tailstock body, is coaxial with the core shaft and is provided with a shaft shoulder, the inner end of the screw rod is arranged in the spring installation hole, the driving spring is arranged in the spring installation hole, the two ends of the driving spring are respectively pressed on the bottom wall in the spring installation hole and the shaft shoulder of the screw rod, the automatic driving device is characterized by further comprising a first connecting rod, a movable guide rod and a cylinder, the first connecting, the tailstock structure comprises a driving retaining shoulder protruding towards one side of a first connecting rod, the driving retaining shoulder is arranged in front of the first connecting rod, the first connecting rod can abut against the driving retaining shoulder, a cylinder is installed on a tailstock body, and a piston rod of the cylinder is connected with a movable guide rod.

Further, still include the camshaft, the camshaft rotationally sets up on the tailstock body, and the inner end of camshaft is equipped with eccentric gyro wheel, and eccentric gyro wheel's rim is hugged closely first connecting rod, rotates the camshaft, and eccentric gyro wheel can promote first connecting rod and dabber at axial displacement.

Further, the first connecting rod is provided with a guide hole, the movable guide rod penetrates through the guide hole, and the first connecting rod can move back and forth along the movable guide rod.

Further, be equipped with the handle on the camshaft, the handle is outside at the tailstock body. The mandrel can be returned by pulling the handle, and the operation is convenient and reliable.

Further, the tailstock body comprises a rear cover plate and a first flange plate, the rear cover plate is located at the rear end of the tailstock body, the first flange plate is arranged on the rear cover plate and is provided with a threaded hole, the threaded through hole is coaxially arranged with the core shaft, and the screw rod is in threaded connection with the threaded through hole.

Further, be provided with two or more linear bearing between dabber and the drive mounting hole, adjacent two be provided with the bush between the linear bearing, be provided with the oil groove on the outer periphery on the bush, be provided with a plurality of oilholes that circumference array distributes on the oil groove.

Further, be provided with the oil filler point on the tailstock body, the oil filler point link up to the oil groove on the bush. The device has the function of easily injecting lubricating oil into the core shaft.

Furthermore, the front end of the driving installation hole is provided with a blocking cover, and the rear end of the driving installation hole is provided with an elastic check ring.

Further, the tailstock body comprises a second flange plate positioned at the top, and the cam shaft is rotatably arranged on the second flange plate through a bearing and is arranged above the first connecting rod.

The utility model adopts the driving spring to provide the jacking force for the mandrel, and has the advantages of soft output process of the jacking force and vibration absorption; the simple screwing motion of the screw rod is converted into the axial movement of the screw rod, so that pretightening force is applied to the driving spring, namely the jacking force of the mandrel and a top tip on the mandrel on a workpiece is adjusted, and the operation is very convenient and fast; the cylinder and the movable guide rod are abutted against the first connecting rod, so that the cylinder drives the piston rod to retract, the retraction of the first connecting rod and the mandrel is realized, and the device is convenient and reliable. The utility model discloses still provide manual return dabber and top mode, realize the return of dabber through rotating the camshaft, convenient operation is reliable. Furthermore, the utility model discloses the dabber that still has easy operation pours into lubricating oil function into.

Drawings

FIG. 1 is a schematic perspective view of an automatic driving device for a tailstock mandrel of a machine tool;

FIG. 2 is a top view of the automatic tailstock mandrel driving device of the machine tool shown in FIG. 1;

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

fig. 4 is a schematic structural view of the middle tail seat body of the present invention;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 4;

fig. 6 is a cross-sectional view of the central spindle of the present invention;

FIG. 7 is a sectional view taken along line B-B of FIG. 2;

fig. 8 is a schematic structural view of the middle camshaft of the present invention;

fig. 9 is a schematic structural diagram of the first connecting rod of the present invention.

In the figure: 1-a tail seat body, 2-a mandrel, 3-a rear cover plate, 4-a handle, 5-a screw rod, 7-a camshaft, 8-a first connecting rod, 9-a driving spring, 10-a second flange plate, 11-a blocking cover, 12-a linear bearing, 13-a lining, 14-an elastic retainer ring, 15-a cylinder and 16-a first flange plate, 17-movable guide rod, 17 a-driving retaining shoulder, 18-tip, 19-guiding linear bearing, 101-driving mounting hole, 102-driving bin, 103-top flange mounting hole, 104-oil injection hole, 201-tip mounting hole, 202-spring mounting hole, 301-cylinder mounting preformed hole, 701-eccentric roller, 801-guide hole, 802-through hole and 803-retaining shoulder.

Detailed Description

Referring to fig. 1 to 3, the automatic driving device for the tailstock mandrel of the machine tool comprises a tailstock body 1, a mandrel 2, a screw rod 5 and a driving spring 9. Referring to fig. 4 and 5, the tailstock body 1 has a driving installation hole 101 and a driving cabin 102, the driving installation hole 101 communicates with the front end of the tailstock body 1, the driving cabin 102 communicates with the rear end of the tailstock body, and the front end of the driving cabin 102 communicates with the rear end of the driving installation hole 101. Referring to fig. 3, the mandrel 2 is disposed in the driving installation hole 101, penetrates through the entire driving installation hole 101, the front end of the mandrel extends out of the front end of the driving installation hole 101 to the outside of the tailstock body 1, the rear end of the mandrel extends out of the rear end of the driving installation hole 101 and is located in the driving chamber 102, and the mandrel 2 can move back and forth in the axial direction relative to the tailstock body 1. One, two or more linear bearings 12 are arranged between the mandrel 2 and the driving installation hole 101, a bush 13 is arranged between two adjacent linear bearings 12, an oil groove is arranged on the outer circumferential surface of the bush 13, and a plurality of oil holes distributed in a circumferential array are arranged on the oil groove. Referring to fig. 4, the upper end of the tailstock body 1 corresponding to the position of the bush 13 is provided with an oil filling hole 104, and the oil filling hole 104 penetrates through an oil groove on the bush, so that the spindle has the function of easily injecting lubricating oil. The drive mounting hole 101 is provided at its front end with a stopper cap 11 and at its rear end with a circlip 14 to exert axial restraint on the linear bearing 12 located in the drive mounting hole 101.

Referring to fig. 6, the front section of the mandrel 2 is provided with a tip mounting hole 201, the rear section is provided with a spring mounting hole 202, the tip mounting hole 201 is communicated with the spring mounting hole 202, and the two together run through the whole mandrel 2. The tailstock body 1 comprises a rear cover plate 3 and a first flange 16, the rear cover plate 3 is located at the rear end of the tailstock body, the rear end of the drive bin 102 is sealed by the rear cover plate 3, the first flange 16 is arranged on the rear cover plate 3, the first flange 16 is provided with a threaded hole, and the threaded hole is coaxially arranged with the mandrel 2. The screw 5 is in threaded connection with the threaded through hole on the first flange 16, is coaxial with the mandrel 2, and has a shoulder, and the inner end of the screw 5 is in the spring mounting hole 202. The drive spring 9 is arranged in the spring mounting hole 101, the front end of the drive spring is pressed on the bottom wall in the spring mounting hole 10, the rear end of the drive spring is pressed on the shaft shoulder of the screw rod 5, and the inner end of the screw rod 5 is sleeved in the drive spring 9. The rear end of the screw 5 extends beyond the first flange 16. When the screw 5 is screwed, the screw 5 moves forward while rotating, the screw 5 pushes the driving spring 9, and the driving spring 9 retracts and pushes the mandrel 2 to move in the front end direction and extend out of the tailstock body 1.

The first connecting rod 8 is connected with the rear end of the mandrel 2 in the driving cabin 102 of the tailstock body 1 and moves together with the mandrel 2. Referring to fig. 9, the first link 8 is provided with a through guide hole 801 and a through hole 802, and a shoulder 803 is provided above the through hole 802. The screw 5 passes through the through hole 802 and can move back and forth relative to the through hole 802.

Referring to fig. 3 and 4, the tailstock body 1 comprises a second flange 10 at the top, and the second flange 10 is mounted in the flange mounting hole 103. The camshaft 7 is rotatably disposed on the second flange 10, above the first link 8, and is rotatable relative to the tailstock body 1 and the first link 8. One or more bearings are arranged between the camshaft 7 and the second flange plate 10, the outer ring of each bearing is inserted into a bearing hole formed in the second flange plate, and the inner ring of each bearing is sleeved on the camshaft.

Referring to fig. 8, the cam shaft 7 is provided with an eccentric roller 701 at the inner end, the rim of the eccentric roller 701 abuts against the shoulder 803 of the first connecting rod 8, and the cam shaft 7 is rotated, so that the eccentric roller 701 pushes the first connecting rod 8 and the mandrel 2 to move in the axial direction. The handle 4 is fixedly connected with the top end of the camshaft 7 and is arranged outside the tailstock body 1, so that the handle 4 is linked with the camshaft 7.

Referring to fig. 7, the tailstock body 1 is provided with a movable guide rod 17, the movable guide rod 17 is located in the driving chamber, the front end of the movable guide rod 17 is movably connected with the tailstock body 1 through a guide linear bearing 19 embedded in the tailstock body 1, a space for the movable guide rod to move forward is arranged in the tailstock body, and the rear end of the movable guide rod passes through and extends out of the rear cover plate 3. The movable guide rod 17 is provided with a driving shoulder 17a, and the driving shoulder 17a is located in front of the first connecting rod 8, is closer to the front end of the mandrel 2 than the first connecting rod 8, and is specifically located between the guiding linear bearing 19 and the first connecting rod 8. The movable guide rod 17 passes through the guide hole 801 on the first connecting rod 8, the first connecting rod 8 moves back and forth along the movable guide rod 17, when the first connecting rod 8 leans against the driving shoulder 17a, the first connecting rod 8 can drive the movable guide rod 17 to move forward, and the movable guide rod 17 can also drive the first connecting rod 8 to move backward. The cylinder 15 is installed on the tailstock body 1, and outside the back shroud 3, and the piston rod of the cylinder 15 and the movable guide bar 17 fixed connection, when the piston rod contracts, the driving shoulder will drive the first connecting rod 8 to move to the rear end direction of the tailstock body.

The working process is as follows:

the centre 18 is inserted into the centre mounting hole 201 at the front end of the mandrel 2, and when the centre 18 props against the end part of a workpiece to be processed, the centre 18 is fastened due to the conical surface matching with the centre mounting hole; by screwing the screw rod 5 with a wrench, the screw rod 5 abuts against the driving spring 9, the driving spring 9 abuts against the mandrel 2, the mandrel 2 drives the first connecting rod 8 to move towards the front end of the tailstock body 1 along the axial direction of the mandrel, the first connecting rod 8 drives the movable guide rod 17 to move together, in the process, the electromagnetic valve for controlling the movement of the cylinder 15 needs to be powered off, so that the gas in the cylinder can be smoothly discharged, and the piston rod of the cylinder 15 moves along with the movable guide rod 17; when the driving shoulder 17a of the movable guide rod 17 abuts against the inner wall of the tailstock body at the position of the guide linear bearing, the first connecting rod 8 and the mandrel 2 cannot move continuously to the front of the tailstock body, the screw is continuously screwed, the driving spring is compressed to generate a pre-tightening force, and the required pre-tightening force is determined according to actual processing conditions; when the tail seat needs to be abutted against a workpiece, the telescopic rod of the air cylinder 15 is controlled to retract through the electromagnetic valve, the electromagnetic valve is connected with the air cylinder through an air pipe, and the action of the electromagnetic valve is controlled through a PLC (programmable logic controller) positioned in the numerical control system; when the center 18 retracts to a certain distance into the tailstock body 1, a workpiece is installed in a reserved space, after the workpiece is aligned, the piston rod of the cylinder is driven by the electromagnetic valve to move in the reverse direction, and the center extends out of the tailstock body again until the center abuts against the end part of the workpiece, so that abutting force is applied to the workpiece; and a signal wire for identifying a stroke end point and a stroke starting point is arranged on the cylinder and is used as a stroke limit for the extension and contraction of the tip and the mandrel.

The device also provides a mode of manually returning the core shaft and the tip, the core shaft 2 drives the first connecting rod 8 to move to the front end of the tailstock body along the axial direction of the core shaft, the blocking shoulder part on the first connecting rod 8 supports against the eccentric roller 701 of the cam shaft to enable the eccentric roller to rotate while rotating along the axis of the cam shaft 7, the handle 4 rotates synchronously at the moment, when the driving blocking shoulder part of the movable guide rod 17 supports against the inner wall of the tailstock body at the position of the guide linear bearing, the first connecting rod 8 and the core shaft 2 cannot continuously move to the front of the tailstock body, the screw rod is continuously screwed at the moment, the driving spring is compressed to generate pretightening force, and the required pretightening force is determined according to actual processing conditions; when the tailstock needs to be propped against a workpiece, the handle is pulled off by hands, so that the eccentric cam props against the shoulder blocking part of the first connecting rod to move towards the rear end of the tailstock body, and the core shaft and the tip can retract towards the inside of the tailstock body; when the tip retracts to one end of the tailstock body for a distance, a workpiece is installed in a reserved space, after the workpiece is placed, the handle is slowly loosened, the handle rotates under the driving action of the compression energy of the driving spring, the tip extends out of the tailstock body again until the tip abuts against the end of the workpiece, and abutting force is applied to the workpiece.

The handle comprises a handle positioned on the upper part and a driving disc positioned on the lower part, the handle and the driving disc are meshed and connected through a polygonal hole, the handle and the driving disc are attached to each other in the vertical direction through a constraint spring, after the handle of the handle is lifted, the handle is separated from the driving disc, the handle of the handle can be randomly rotated to a proper position, and the handle is pulled back by the constraint spring and is meshed with the driving disc again in a natural state.

Claims

1. An automatic driving device of a machine tool tailstock mandrel comprises a tailstock body (1), a mandrel (2), a screw rod (5) and a driving spring (9), wherein the tailstock body (1) is provided with a driving installation hole (101) communicated with the front end of the tailstock body, the mandrel (2) is movably arranged in the driving installation hole, the front end and the rear end of the mandrel extend out of the driving installation hole, the front section and the rear section of the mandrel are respectively provided with a top installation hole (201) and a spring installation hole (202) which are communicated, the screw rod (5) is in threaded connection with the tailstock body (1), is coaxial with the mandrel (2) and is provided with a shaft shoulder, the inner end of the screw rod is arranged in the spring installation hole, the driving spring (9) is arranged in the spring installation hole, and the two ends of the driving spring installation hole are respectively pressed on the bottom wall in the spring installation hole and the shaft shoulder of the screw rod, and is characterized by further comprising a first connecting rod (8), a movable guide rod, the rear end of dabber is connected in first connecting rod (8), and movable guide bar (17) are movably set up on tailstock body (1), have to the convex drive of first connecting rod (8) one side and keep off shoulder (17a), and the drive keeps off shoulder (17a) in the place ahead of first connecting rod (8), and first connecting rod (8) can support and lean on drive keeps off shoulder (17a), and cylinder (15) are installed on tailstock body (1), and its piston rod is connected with movable guide bar (17).

2. The automatic driving device for the tailstock mandrel of a machine tool according to claim 1, further comprising a cam shaft (7), wherein the cam shaft (7) is rotatably arranged on the tailstock body, an inner end of the cam shaft is provided with an eccentric roller (901), a rim of the eccentric roller abuts against the first connecting rod, and the cam shaft is rotated, and the eccentric roller can push the first connecting rod and the mandrel to move in the axial direction.

3. The automatic driving device for the tailstock mandrels of machine tools according to claim 2, characterized in that the first connecting rod (8) is provided with a guide hole (801) through which the movable guide rod (17) passes, and the first connecting rod can move back and forth along the movable guide rod (17).

4. The automatic driving device of a tailstock mandrel of a machine tool according to claim 3, characterized in that the camshaft (7) is provided with a handle (4) external to the tailstock body.

5. The automatic driving device for the tailstock mandrel of a machine tool according to claim 4, characterized in that the tailstock body (1) comprises a rear cover plate (3) and a first flange (16) at the rear end thereof, the first flange (16) is arranged on the rear cover plate (3), the first flange (16) has a threaded through hole, the threaded through hole is arranged coaxially with the mandrel (2), and the screw (5) is in threaded connection with the threaded through hole.

6. The automatic driving device for the tailstock mandrel of a machine tool as claimed in claim 5, wherein two or more linear bearings are disposed between the mandrel and the driving installation hole, a bushing is disposed between two adjacent linear bearings, an oil groove is disposed on an outer circumferential surface of the bushing, and a plurality of oil holes are disposed on the oil groove and distributed in a circumferential array.

7. The automatic driving device for the tailstock and the spindle of the machine tool as claimed in claim 6, wherein the tailstock body is provided with an oil filling hole, and the oil filling hole penetrates through an oil groove on the bushing.

8. The automatic driving device for the tailstock mandrel of a machine tool as claimed in claim 7, wherein the front end of the driving installation hole is provided with a stop cover, and the rear end of the driving installation hole is provided with a circlip.

9. The automatic driving device of the tailstock mandrel of a machine tool according to claim 8, characterized in that the tailstock body (1) comprises a second flange (10) at the top, on which second flange (10) the camshaft (7) is rotatably mounted by means of bearings, above the first connecting rod (8).