Locking mandrel capable of rapidly positioning

Abstract

The utility model relates to the technical field of lathe machining, in particular to a locking mandrel capable of being quickly positioned, a first nut is screwed, the first nut is in threaded connection with a mandrel main body, so that the first nut slides on the mandrel main body when the first nut is screwed, and the first nut is screwed to rotate around the mandrel main body. When the push plate slides forwards, the push rod pushes the dragging plate to slide forwards, the dragging plate enables the six supporting rods to rotate at the same time, the six supporting rods abut against the inner wall of the workpiece, and due to the fact that the six supporting rods are completely the same, when all the six supporting rods abut against the inner wall of the workpiece, the pushing plate is pushed to slide in the sliding groove. The axis of the workpiece coincides with the axis of the mandrel body, positioning of the workpiece is completed, the supporting rod is pulled to rotate by rotating the first nut, adjustment of the length from the tail end of the supporting rod to the axis of the mandrel body is completed, and the effect that the axis position of the workpiece can be rapidly positioned is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe processing, in particular to a locking mandrel which can be quickly positioned. Background Art

[0002] Lathes are machine tools that mainly use turning tools to turn rotating workpieces. Drills, reamer, reamers, taps, dies and knurling tools can also be used on lathes for corresponding processing. Lathes are mainly used to process shafts, discs, sleeves and other workpieces with rotating surfaces. They are the most widely used type of machine tools in machinery manufacturing and repair factories.

[0003] At present, the existing core shaft (such as patent number: CN208169319U) discloses a core shaft, including a shaft body, a cylindrical mounting groove is opened on one side of the shaft body, a mounting hole is opened in the middle position of the inner wall of the mounting groove, a central axis hole arranged in the horizontal direction is opened on the inner wall of the mounting hole, and fixing holes symmetrically arranged and located on the shaft body are opened on both sides of the mounting groove. A sleeve is threadedly connected to the inner wall of the mounting hole, and the inner ring of the sleeve is fixedly sleeved with a cylinder arranged in the horizontal direction. A bearing fixedly sleeved with the outer ring of the cylinder is provided on one side of the sleeve, and the outer ring of the bearing is fixedly sleeved with a protective plate with a convex structure. The outer ring of the protective plate close to one end of the sleeve is fixedly sleeved with a fixing plate, and a groove is opened on the side of the protective plate away from the sleeve. The utility model can provide a protective measure for the core shaft during processing and use to prevent the core shaft surface from being seriously scratched by the hub flange and affecting the product quality. At the same time, the core shaft is convenient for discharging internal aluminum chips during processing, and it is convenient to fix the protective plate.

[0004] However, in the process of implementing the above technical solution, it was found that there are at least the following technical problems: when processing a cylindrical workpiece, the existing mandrel needs to be measured first to determine the axis position of the workpiece before it can be fixed and installed for use, and the operation steps are too cumbersome. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a locking mandrel that can be quickly positioned, which solves the technical problem that the existing mandrel, when processing a cylindrical workpiece, needs to be measured first to determine the axis position of the workpiece before it can be fixed and installed for use, and the operating steps are too cumbersome.

[0007] (II) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A locking spindle that can be quickly positioned comprises a spindle body, six support rods are evenly rotatably mounted on the side ends of the spindle body, four slide grooves are provided on the spindle body, a support plate is fixedly mounted on the inner side wall of the spindle body, a push plate is slidably mounted inside the slide groove, a push rod is fixedly mounted on the side end of the push plate, and a drag plate is fixedly mounted on the side end of the push rod; the drag plate is slidably connected to the six support rods, a first nut is threadedly mounted on the outer side wall of the spindle body, and a second nut is threadedly mounted on the outer side wall of the spindle body; the first nut is rotatably connected to the push plate, and six through holes are provided on the first nut.

[0010] Preferably: a push ring is rotatably mounted on the side end of the second nut.

[0011] Preferably, six insert blocks are evenly fixedly mounted on the side ends of the push ring.

[0012] (III) Beneficial effects

[0013] 1. Put the cylindrical workpiece on the mandrel body and screw the first nut. Since the first nut and the mandrel body are threadedly connected, screwing the first nut will make the first nut slide on the mandrel body. While the first nut rotates around the mandrel body, the push plate rotates inside the first nut, thereby pushing the push plate to slide in the slide groove. When the push plate slides forward, the push rod will push the drag plate to slide forward, and the drag plate will cause the six struts to rotate at the same time. The six struts will resist the inner wall of the workpiece. Since the six struts are exactly the same, when all six struts resist the inner wall of the workpiece, the axis of the workpiece will coincide with the axis of the mandrel body, completing the positioning of the workpiece. The strut is pulled to rotate by rotating the first nut, and the length from the end of the strut to the axis of the mandrel body is adjusted, thereby achieving the effect of being able to quickly position the axis position of the workpiece.

[0014] 2. Twist the second nut. Since the second nut is threadedly connected to the spindle body, twisting the second nut will cause the second nut to slide on the spindle body. While the second nut rotates around the spindle body, the push ring rotates inside the second nut, thereby pushing the insert to slide inside the first nut. The inclined surface of the insert will press against the side end of the workpiece and the support rod to fix the workpiece during the forward movement, so that the workpiece will not shift during turning. The support plate inside the spindle body can increase the strength of the spindle body to avoid deformation during use. The insert is pushed forward and backward by rotating the second nut, thereby completing the fixation of the workpiece, thereby achieving the effect of making the workpiece more stable and not shifting during the processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the chute of the utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the mandrel body of the utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of a nut of the utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the drag plate of the utility model.

[0020] Legend: 1. Mandrel body; 2. Support rod; 3. Drag plate; 4. Push rod; 5. Push plate; 6. First nut; 7. Push ring; 8. Second nut; 9. Insert block; 11. Support plate; 12. Slide groove. DETAILED DESCRIPTION

[0021] The embodiment of the present application provides a locking spindle that can be quickly positioned, which effectively solves the problem of the existing spindle that, when processing a cylindrical workpiece, needs to be measured first to determine the axis position of the workpiece before it can be fixed and installed for use, and the technical problem of the operation steps being too cumbersome. The cylindrical workpiece is put on the spindle body, and the first nut is screwed. Since the first nut and the spindle body are threadedly connected, screwing the first nut will cause the first nut to slide on the spindle body. While the first nut rotates around the spindle body, the push plate rotates inside the first nut, thereby pushing the push plate to slide in the slide groove. When the push plate slides forward, the push rod will push the drag plate to slide forward. The drag plate will cause the six struts to rotate simultaneously, and the six struts will resist the inner wall of the workpiece. Since the six struts are exactly the same, when all six struts resist the inner wall of the workpiece, the axis of the workpiece will coincide with the axis of the spindle body, completing the work. The workpiece is positioned by rotating the first nut to pull the support rod to rotate, and the adjustment of the axial length from the end of the support rod to the core shaft body is completed, so as to achieve the effect of quickly positioning the axial position of the workpiece, and the second nut is turned. Since the second nut is threadedly connected to the core shaft body, turning the second nut will cause the second nut to slide on the core shaft body. While the second nut rotates around the core shaft body, the push ring rotates inside the second nut, thereby pushing the insert block to slide inside the first nut. The inclined surface of the insert block will press against the side end of the workpiece and fix the workpiece with the support rod during the forward movement, so that the workpiece will not deviate during turning. The support plate inside the core shaft body can increase the strength of the core shaft body and avoid deformation during use. The insert block is pushed forward and backward by rotating the second nut to complete the fixation of the workpiece, so as to achieve the effect of making the workpiece more stable and not deviating during the processing.

[0022] Example

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that the existing mandrel needs to be measured first when processing a cylindrical workpiece, and the axis position of the workpiece needs to be determined before it can be fixed and installed for use, and the operation steps are too complicated. The overall idea is as follows:

[0024] In view of the problems existing in the prior art, the utility model provides a locking mandrel that can be quickly positioned, a locking mandrel that can be quickly positioned, including a mandrel body 1, six support rods 2 are evenly rotatably installed on the side ends of the mandrel body 1, four slide grooves 12 are opened on the mandrel body 1, a support plate 11 is fixedly installed on the inner side wall of the mandrel body 1, a push plate 5 is slidably installed inside the slide groove 12, and a push rod 4 is fixedly installed on the side end of the push plate 5.

[0025] A drag plate 3 is fixedly installed on the side end of the push rod 4; the drag plate 3 is slidably connected to the six support rods 2, a first nut 6 is threadedly installed on the outer wall of the core shaft body 1, and a second nut 8 is threadedly installed on the outer wall of the core shaft body 1.

[0026] The first nut 6 is rotatably connected to the push plate 5 , and six through holes are formed on the first nut 6 . A push ring 7 is rotatably mounted on the side end of the second nut 8 , and six insert blocks 9 are evenly and fixedly mounted on the side end of the push ring 7 .

[0027] Working principle:

[0028] The first step is to put the cylindrical workpiece on the core shaft body 1 and screw the first nut 6. Since the first nut 6 and the core shaft body 1 are threadedly connected, screwing the first nut 6 will cause the first nut 6 to slide on the core shaft body 1. While the first nut 6 rotates around the core shaft body 1, the push plate 5 rotates inside the first nut 6, thereby pushing the push plate 5 to slide in the slide groove 12. When the push plate 5 slides forward, the push rod 4 will push the drag plate 3 to slide forward, and the drag plate 3 will cause the six support rods 2 to rotate at the same time. The six support rods 2 will resist the inner wall of the workpiece. Since the six support rods 2 are exactly the same, when all the six support rods 2 resist the inner wall of the workpiece, the axis of the workpiece will coincide with the axis of the core shaft body 1, completing the positioning of the workpiece, and the support rod 2 is pulled to rotate by rotating the first nut 6 to complete the adjustment of the length from the end of the support rod 2 to the axis of the core shaft body 1, thereby achieving the effect of being able to quickly position the axis position of the workpiece.

[0029] The second step is to screw the second nut 8. Since the second nut 8 is threadedly connected to the spindle body 1, screwing the second nut 8 will cause the second nut 8 to slide on the spindle body 1. While the second nut 8 rotates around the spindle body 1, the push ring 7 rotates inside the second nut 8, thereby pushing the insert block 9 to slide inside the first nut 6. The inclined surface of the insert block 9 will press against the side end of the workpiece and the support rod 2 to fix the workpiece during the forward movement, so that the workpiece will not shift during turning. The support plate 11 inside the spindle body 1 can increase the strength of the spindle body 1 to avoid deformation during use. The insert block 9 is pushed forward and backward by rotating the second nut 8 to complete the fixation of the workpiece, thereby achieving the effect of making the workpiece more stable and not shifting during the processing.

[0030] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A locking mandrel capable of rapid positioning, comprising a mandrel body (1), characterized in that: Six support rods (2) are evenly rotatably mounted on the side ends of the mandrel body (1), four slide grooves (12) are opened on the mandrel body (1), and a support plate (11) is fixedly mounted on the inner side wall of the mandrel body (1).

2. A fast positioning locking mandrel according to claim 1, characterized in that: A push plate (5) is slidably mounted inside the slide groove (12), and a push rod (4) is fixedly mounted on the side end of the push plate (5).

3. A fast positioning locking mandrel as claimed in claim 2, characterized in that: A drag plate (3) is fixedly mounted on the side end of the push rod (4); The drag plate (3) is slidably connected to the six support rods (2).

4. A fast-positionable locking mandrel according to claim 1, characterized in that: A first nut (6) is threadedly mounted on the outer wall of the mandrel body (1), and a second nut (8) is threadedly mounted on the outer wall of the mandrel body (1); The first nut (6) is rotatably connected to the push plate (5), and six through holes are formed on the first nut (6).

5. A fast-positionable locking mandrel as claimed in claim 4, characterized in that: A push ring (7) is rotatably mounted on the side end of the second nut (8).

6. A fast-positionable locking mandrel according to claim 5, characterized in that: Six insert blocks (9) are evenly and fixedly mounted on the side ends of the push ring (7).

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