Tail supporting device for machining screw

Abstract

A tail supporting device for machining a screw comprises a workbench, a driving seat fixedly arranged on the left portion of the workbench and a tail seat arranged on the right portion of the workbench in a sliding mode, a bearing seat I is arranged on the upper portion of the tail seat in a sliding mode in the front-back direction through a lead screw sliding block mechanism, and a lifting adjusting mechanism is arranged between the lower portion of the bearing seat I and the lead screw sliding block mechanism. A positioning shaft is rotationally installed in the middle of the bearing seat I in the horizontal direction, a three-jaw chuck I is installed at the left end of the positioning shaft, a three-jaw chuck is arranged on the right side of the driving seat, and the three-jaw chuck and the three-jaw chuck I are used for clamping and positioning the two ends of the screw. According to the device, the three-jaw chuck I replaces a tip in the prior art to position the tail of the screw, the structure of the positioned screw is more stable, the screw is not prone to shaking in the machining process, and the machining precision is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tail support device of processing screw rod. BACKGROUND

[0002] The processing of plastic products is completed by a plastic extruder, which is composed of a feeding system, a heating system and a feeding screw rod. The plastic extruder can heat fixed plastic particles to a molten state and then extrude them into a corresponding mold to obtain the required plastic products after cooling. The screw rod is one of the core components of the extruder, which functions to transport, compact, melt, stir and press the plastic. The existing screw rod processing device generally clamps and positions one end of the screw rod by a hydraulic chuck and clamps and positions the other end of the screw rod by a center. Point contact is formed between the center and the screw rod, and the contact area is small. When the length and size of the screw rod are large, the overall weight is also increased synchronously. The center clamping method is prone to cause unstable positioning of the screw rod, and the screw rod shakes during processing, which affects the processing precision of the product. SUMMARY

[0003] In view of the deficiencies in the above problems, the utility model provides a tail support device of processing screw rod.

[0004] To achieve the above purpose, the utility model provides a tail support device of processing screw rod, which comprises a workbench, a driving seat fixed to the left part of the workbench, a tailstock slidingly arranged on the right part of the workbench, a bearing seat I slidingly arranged on the upper part of the tailstock through a screw block mechanism in the front and back directions, a lifting adjusting mechanism arranged between the lower part of the bearing seat I and the screw block mechanism, a positioning shaft rotatably installed in the middle part of the bearing seat I in the horizontal direction, a three-jaw chuck I installed on the left end of the positioning shaft, a three-jaw chuck arranged on the right side of the driving seat, and the three-jaw chuck and the three-jaw chuck I are used for clamping and positioning the two ends of the screw rod.

[0005] As a further improvement of the utility model, the lower part of the tailstock is slidingly matched with the workbench through a sliding rail, and a side pushing air cylinder is connected to the right side of the tailstock.

[0006] As a further improvement of the utility model, the screw block mechanism comprises a sliding block, the lower part of the sliding block is slidingly matched with the tailstock through a sliding rail I, the middle part of the sliding block is threadedly connected with a screw rod, the screw rod is connected with the tailstock through a bearing seat at both ends, and one end of the screw rod is provided with a hand wheel.

[0007] As a further improvement of the utility model, a limiting pin is inserted between the hand wheel and the corresponding bearing seat.

[0008] As a further improvement of the utility model, the lifting adjusting mechanism comprises a positioning bolt, the lower part of the positioning bolt is fixed with the sliding block, and the upper part of the positioning bolt passes through the bearing seat I and is locked and limited by a locking nut.

[0009] As a further improvement of the utility model, bearings are arranged between the bearing seat I and the positioning shaft, the bearings are arranged in pairs, a bushing is arranged between the bearings, and the bearing seat I is provided with a cover on both sides to form axial limitation on the bearings.

[0010] The utility model has the advantages of:

[0011] The device replaces the tail part of the screw by the three-jaw chuck I in the prior art to position the screw, the structure of the positioned screw is more stable, and the screw is not prone to shaking during machining, thereby ensuring machining precision; the three-jaw chuck I is fixed to the end of the positioning shaft and rotationally connected with the bearing seat I, the bearing seat I can be adjusted in the front-rear direction and the up-down height position relative to the tailstock, so that the central axis of the three-jaw chuck I is kept consistent with the center of the three-jaw chuck on the right side of the driving seat, and positioning precision is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front view of the tail part supporting device for machining a screw of the utility model.

[0013] Figure 2 It is a front view of the tail part supporting device for machining a screw of the utility model. Figure 1 It is a front view of the tail part supporting device for machining a screw of the utility model.

[0014] In the drawing: 1, workbench; 2, driving seat; 3, three-jaw chuck; 4, screw; 5, sliding rail; 6, tailstock; 7, screw sliding block mechanism; 71, sliding block; 72, screw rod; 73, sliding rail I; 74, bearing seat; 75, hand wheel; 76, limiting pin; 8, side pushing air cylinder; 9, lifting adjusting mechanism; 91, positioning bolt; 92, locking nut; 10, bearing seat I; 101, bearing; 102, bushing; 103, cover; 11, positioning shaft; 12, three-jaw chuck I. DETAILED DESCRIPTION

[0015] As Figures 1-2The utility model discloses a tail support device of processing screw rod, including work table 1, the drive seat 2 of fixedly being established in the left part of work table 1, the tail seat 6 of sliding being established in the right part of work table 1, the lower part of tail seat 6 forms the sliding fit with work table 1 through slide rail 5, tail seat 6 right side connects side push air cylinder 8, bearing seat I 10 is slidingly established on the upper part of tail seat 6 through screw block mechanism 7 along the front and back direction, screw block mechanism 7 includes sliding block 71, the lower part of sliding block 71 forms the sliding fit with tail seat 6 through slide rail I 73, the middle part of sliding block 71 is connected with screw rod 72 threadedly, the front and back two ends of screw rod 72 are connected with tail seat 6 through bearing seat 74, one end of screw rod 72 is equipped with hand wheel 75, and the limiting pin 76 is inserted between hand wheel 75 and corresponding bearing seat 74, and the lower part between bearing seat I 10 and screw block mechanism 7 is equipped with lifting adjusting mechanism 9, and lifting adjusting mechanism 9 includes locating bolt 91, the lower part of locating bolt 91 is fixed with sliding block 71, the upper part of locating bolt 91 passes through bearing seat I 10 and is locked and limited through locking nut 92, the middle part of bearing seat I 10 is rotatably installed positioning shaft 11 along the horizontal direction, bearing 101 is equipped between bearing seat I 10 and positioning shaft 11, bearing 101 is arranged in pairs, and bushing 102 is equipped between bearing 101, and the both sides of bearing seat I 10 are equipped with the cover 103 of bearing 101 and form axial limit, and three jaw chuck I 12 is installed at the left end of positioning shaft 11, and three jaw chuck 3 is arranged at the right side of drive seat 2, and three jaw chuck 3 and three jaw chuck I 12 are used to hold and position the both ends of screw rod 4.

[0016] The device is positioned by three jaw chuck I instead of the existing technology top center to the tail of screw rod, and the structure of the screw rod after positioning is more stable, and the screw rod does not shake during processing, so that the machining precision is guaranteed.

[0017] In specific use, for the convenience of understanding the utility model, the description is made in combination with the drawings.

[0018] During work, the position of three jaw chuck I can be adjusted in cooperation with collimator first, so that the center of three jaw chuck I and three jaw chuck is kept consistent, when adjusting the front and back direction, the limiting pin between hand wheel and bearing seat is taken down first, the hand wheel is rotated to drive the synchronous rotation of screw rod, the rotary motion of screw rod is converted into the linear motion of sliding block, and the sliding block drives the whole bearing seat to adjust the position along the front and back direction, when adjusting the up and down position, the locking nut on the upper part of locating bolt is loosened, then the lower locking nut is rotated, the bearing seat I is adjusted to the specified height, and then the upper locking nut is tightened.

[0019] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tail support apparatus for machining a screw rod, characterized by: The utility model provides a workbench, drive seat (2) is fixed to left part of the workbench (1), tailstock (6) is slidably arranged in right part of the workbench (1), bearing seat I (10) is slidably arranged on the upper portion of tailstock (6) along the front and back direction through screw block mechanism (7), and the lower portion between bearing seat I (10) and screw block mechanism (7) is equipped with lifting adjusting mechanism (9), the middle part of bearing seat I (10) is rotatably installed positioning shaft (11) along the horizontal direction, three jaw chuck I (12) is installed to the left end of positioning shaft (11), three jaw chuck (3) is equipped on the right side of drive seat (2), and three jaw chuck (3) and three jaw chuck I (12) are used to hold and position the both ends of screw rod (4).

2. A tail support apparatus for machining a screw rod according to claim 1, characterized in that: The lower portion of tailstock (6) is slidably connected with the workbench (1) through slide rail (5), and the right side of tailstock (6) is connected with side pushing air cylinder (8).

3. A tail support apparatus for machining a screw rod as set forth in claim 1, characterized in that: The screw block mechanism (7) comprises a sliding block (71), the lower portion of the sliding block (71) is slidably connected with the tailstock (6) through slide rail I (73), the middle portion of the sliding block (71) is threadedly connected with a screw rod (72), the front and back ends of the screw rod (72) are connected with the tailstock (6) through bearing seat (74), and one end of the screw rod (72) is provided with a hand wheel (75).

4. A tail support apparatus for machining a screw rod as set forth in claim 3, characterized in that: A limiting pin (76) is arranged between the hand wheel (75) and the corresponding bearing seat (74).

5. A tail support apparatus for machining a screw rod as set forth in claim 3, characterized in that: The lifting adjusting mechanism (9) comprises a positioning bolt (91), the lower portion of the positioning bolt (91) is fixed with the sliding block (71), the upper portion of the positioning bolt (91) passes through bearing seat I (10) and is locked and limited by a locking nut (92).

6. A tail support apparatus for machining a screw rod as defined in claim 1, characterized in that: A bearing (101) is arranged between the bearing seat I (10) and the positioning shaft (11), the bearings (101) are arranged in pairs, a bushing (102) is arranged between the bearings (101), and cover plates (103) are arranged on both sides of the bearing seat I (10) to axially limit the bearings (101).

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