CN201128076Y - Tool retracting mechanism for Morse taper tool shank - Google Patents

Abstract

The utility model relates to a move back the sword mechanism, especially relate to sword mechanism is moved back to mo formula tapering handle of a knife. A main shaft sleeve (10) is sleeved on the lower portion of a main shaft (11) and is connected with the main shaft (11) through an upper bearing assembly (16) and a lower bearing assembly (17), a pin (19) abuts against the lower end of the main shaft sleeve (10), a transverse shaft gear (12) is arranged on the main shaft sleeve (10) and is matched with the tooth position on the main shaft sleeve (10), a long hole is formed in the main shaft (11) and is connected with a cutter handle groove (18) in the lower end of the main shaft (11), and a cutter withdrawing shaft (1) is arranged in the long hole. The utility model does not need any auxiliary tool when retracting the cutter, and does not need to align the position of the cutter retracting groove hole, and the cutter retracting operation is rapid and simple; when the cutter is withdrawn, the cutter can be held by hands, the cutter cannot fall off, a tool is not required to be in contact with the main shaft, the operator cannot be hurt even if the main shaft is suddenly started, and the safety of people, machines, cutters and workpieces is guaranteed.

Description

Morse taper handle retracting mechanism

technical field

The utility model relates to a knife retracting mechanism, in particular to a Morse taper knife handle retracting mechanism.

Background technique

Drills, reamers, and small-sized milling cutters and other commonly used tools are connected to the taper hole of the machine tool spindle with a Morse taper shank. This kind of taper shank has a small taper (mostly below 3°), high positioning accuracy, and easy connection. The force is very large and the self-locking property is very good, so it is widely used, especially the drilling machine (or drilling and milling machine) basically adopts this tool and spindle connection method. This connection method is very simple to install the tool, but not easy to withdraw the tool. Because of the large self-locking force of the connection, there must be sufficient axial force to withdraw the tool holder.

There are three most popular retraction methods for Morse taper holders:

1. Wedge iron retraction method: This is a common method with the longest application time. When parking the tool and withdrawing the tool, insert the wedge iron into the horizontal groove hole of the main shaft to make it contact with the flat tail of the tool handle, and then hammer the end of the large end of the wedge iron with a hammer, and use its axial component force to withdraw from the tool handle. This kind of operation is time-consuming and labor-intensive, and it also requires operating skills. If you are not careful, the tool will suddenly fall off or the wedge iron will fall through the spindle, causing damage to the tool, workpiece or worktable. If the spindle starts suddenly, the consequences will be more serious. This is very unsafe. Furthermore, when the tool is retracted, the spindle will also be subjected to radial force impacts to cause bending deformation and affect the rotation accuracy of the spindle. This method is mainly used for vertical (bench) drilling machines (or drilling and milling machines).

型，退刀时手持特制的L型退刀扳手插入退刀槽孔内用力扳动(必要时也用榔头击打扳手)退刀。这种方法比上法方便，但同样不安全，如扳动时手握不紧而滑脱则更不安全，这种方法主轴没有了径向力，但退刀槽孔的改型则削弱了主轴的刚度。这种方法为摇臂钻床所广泛采用，立式钻床也有应用。2. Retraction wrench method: pull the spindle retraction groove by type to

Type, when withdrawing the knife, hold a special L-shaped tool withdrawal wrench and insert it into the knife withdrawal slot and pull it hard (if necessary, hit the wrench with a hammer) to withdraw the knife. This method is more convenient than the above method, but it is also unsafe. It is even more unsafe if the hand is not tightly gripped and slipped when pulling. This method has no radial force on the main shaft, but the modification of the undercut hole weakens the main shaft. stiffness. This method is widely used in radial drilling machines, and vertical drilling machines are also used.

3. Drive shaft retraction method: The structure of the main shaft system has been greatly changed: the main shaft is shortened and hollow, and a spline hole sleeve is inserted at the upper hole end, and the transmission shaft on the top of the main shaft is extended downward to form a spline shaft extending into the main shaft Inside, and reduce the lower section of the spline shaft to the optical axis and push it into the upper part of the relief hole. There is no need for any tool when withdrawing the tool, just shake the horizontal axis gear and impact the main shaft system to the lower end of the drive shaft, then the tool can be withdrawn. This method is convenient and quick to withdraw the tool, and it is also possible to hold the tool tightly by hand. It is safer than the above two methods, but the disadvantage is that the transmission shaft is subjected to impact force; the diameter and length of the spline connection are limited, resulting in insufficient spline contact strength. This method can only be used on light, small drill presses.

Contents of the invention

The purpose of the invention of the utility model is to provide a convenient and labor-saving Morse taper tool handle withdrawal mechanism.

The technical scheme that the utility model adopts is:

Morse taper tool holder retracting mechanism, the main shaft sleeve is set on the lower part of the main shaft, and is connected with the main shaft through the upper bearing assembly and the lower bearing assembly. : The main shaft is provided with a long hole connected to the tool handle groove at the lower end of the main shaft, the retracting shaft is placed in the long hole, and a part of its end enters the tool handle groove;

The upper end of the retracting shaft is supported in the hole of the bushing. The outer circle of the bushing is closely matched with the hole at the end of the main shaft. There is a keyway inside the bushing. The upper end of the retracting shaft is provided with a pin and inserted into the keyway. There is a table at the lower end of the retracting shaft. It is fixed on the spindle table by a spring, and the lower end surface of the retracting shaft is a spherical end surface;

The tool retracting seat is fixed on the top cover of the spindle box, and the top of the tool retracting seat is provided with an adjusting screw, which is tightened and locked by a thin nut;

Slotted round nuts are arranged on both sides of the contact between the main shaft and the upper end of the main shaft sleeve, and the positioning shaft is in contact with the slotted round nut and is provided with a bayonet card located on the main shaft sleeve.

The function of the pin in the utility model is to prevent the relative rotation of the retracting shaft and the main shaft but to move axially. The effect of spring is to hold up the retracting shaft and make it break away from the flat tail of the knife handle. The tool retracting seat is fixed on the top cover of the spindle box. There is an adjusting screw on the top of the tool retracting seat, which is tightened and locked by a thin nut. The adjusting screw is used to adjust the retracting position of the tool retracting shaft. After the adjustment is completed, lock it with a thin nut . This adjustment is done during assembly and the user does not have to readjust. In the utility model, the main shaft sleeve is connected with the main shaft by means of the upper bearing assembly and the lower bearing assembly. There are slotted round nuts on both sides of the contact point of the upper end, which can move upward against the main shaft sleeve, and the lower end of the main shaft sleeve is moved downward against the main shaft sleeve by a pin, so that the rotation of the horizontal axis gear drives the main shaft sleeve to move up and down, and at the same time drives the main shaft to move up and down .

When the main shaft is at the upper position of the stroke, the upper end of the retracting shaft has been in contact with the adjusting screw, but its lower end is not in contact with the flat tail of the knife handle, so it is impossible to withdraw the knife. This position is limited by the positioning axis. When it is necessary to retract the tool, pull out the positioning shaft first, so that the main shaft sleeve can exceed the upper limit position by a certain distance (usually 3-5mm), then shake the horizontal axis gear to move the main shaft system upwards, and the upper end of the retracting shaft bumps against the adjustment screw The lower end cannot continue to move up, and its lower end contacts the flat tail of the knife handle and pushes the knife handle out to complete the knife retraction action. The upper and lower ends of the retracting shaft of this structure are supported. When the tool is not retracted, it is firmly pressed against the lower end of the bush by the action of the spring. Therefore, the retracting shaft does not move relative to the main shaft when the tool is not retracted, and will not rotate with the main shaft. Vibration and noise are generated.

The utility model does not need to use any auxiliary tools when withdrawing the tool, and does not need to align the position of the tool withdrawing slot hole. Sudden start will not hurt the operator. The safety of people, machines, tools and workpieces is guaranteed; the spindle system is not subject to radial force when retracting the tool, and the tool retracting groove does not need to be modified, which is conducive to maintaining the accuracy and rigidity of the spindle; the spindle only needs to be made hollow, and its outer The connection size of the spline does not change, and the contact strength of the spline connection will not be affected.

Description of drawings:

Fig. 1 is a schematic diagram of the location of the utility model.

Fig. 2 is a structural schematic diagram of the utility model.

Detailed ways

As shown in Figures 1 and 2, 1 is the retracting shaft, 2 is the spring, 3 is the retracting seat, 4 is the bushing, 5 is the pin, 6 is the thin nut, 7 is the adjusting screw, 8 is the positioning shaft, and 9 is the Slotted round nut, 10 is the main shaft sleeve, 11 is the main shaft, 12 is the horizontal shaft gear, 13 is the keyway, 14 is the headstock top cover, 15 is the bayonet, 16 is the upper bearing assembly, 17 is the lower bearing assembly, 18 is Shank groove, 19 is pin.

In the utility model, the main shaft sleeve 10 is set on the lower part of the main shaft 11, and is connected with the main shaft 11 through the upper bearing assembly 16 and the lower bearing assembly 17. The pin 19 is against the lower end of the main shaft sleeve 10. The tooth positions on the sleeve 10 are matched, the main shaft 11 is provided with a long hole connected with the handle groove 18 at the lower end of the main shaft 11, the retracting shaft 1 is placed in the long hole, and the upper end of the retracting shaft 1 is supported in the hole of the bushing 4, The outer circle of the bushing 4 is closely matched with the hole at the end of the main shaft 11. The inner side of the bushing 4 is provided with a keyway 13. The upper end of the retracting shaft 1 is provided with a pin 5 and inserted into the keyway 13. The lower end of the retracting shaft 1 has a surface and is supported by a spring 2. Fixed on the main shaft 11 table, the lower end surface of the tool retracting shaft 1 is a spherical end surface; the tool retracting seat 3 is fixed on the top cover 14 of the spindle box, and the top of the tool retracting seat 3 is provided with an adjusting screw 7, which is tightened by a thin nut 6 Locking: slotted round nuts 9 are provided on both sides of the contact between the main shaft 11 and the upper end of the main shaft sleeve 10, and the positioning shaft 8 is in contact with the slotted round nut 9 and is provided with a bayonet 15 to be positioned on the main shaft sleeve 10.

The utility model operates like this: after the drilling machine stops operating, the positioning shaft 8 is pulled out, and then the horizontal axis gear 12 is shaken to make the main shaft sleeve 10 drive the main shaft to move upward, and the movement of the main shaft 11 makes the retracting shaft 1 through the spring 2 The upper end collides against the lower end of the adjusting screw 7 and cannot continue to move upward. The spherical end surface of the lower end of the retracting shaft 1 moves downwards due to the reaction force and contacts the flat tail of the handle and ejects the handle to complete the retracting action. The upper and lower ends of the retracting shaft of this structure are supported, and when the tool is not retracted, the spring 2 is used to hold the lower end surface of the bushing 4 firmly, so the retracting shaft 1 does not move relative to the main shaft 11 when the tool is not retracted, and it moves with the main shaft. 11 There will be no vibration and noise when rotating.

Claims (1)

1, Morse tapering handle of a knife retraction mechanism, collar bush is sleeved on the main shaft bottom, and be connected with main shaft with lower bearing component by the upper bearing (metal) assembly, the tooth position that collar bush is provided with on transverse axis gear and the collar bush is suitable, it is characterized in that: main shaft is provided with slotted hole and is connected with the handle of a knife groove of main shaft lower end, the withdrawing axle places in the slotted hole, and its terminal part enters the handle of a knife groove;

Withdrawing axle upper end is supported in the hole of lining, the cylindrical of lining and main shaft end aperture close-fitting, the lining inboard is provided with keyway, and withdrawing axle upper end is provided with pin and inserts in the keyway, withdrawing axle lower end has a table top and is fixed on the main shaft table top by spring, and withdrawing axle lower surface is a spherical end surface;

The withdrawing seat is fixed on the main spindle box top cover, and described withdrawing seat top is provided with adjustment screw, and screws locking by thin nut;

Main shaft and both sides, contact position, collar bush upper end are provided with slotted round nut, and locating shaft contacts and is provided with bayonet socket and is positioned on the collar bush with slotted round nut.