CN205342800U - Tailstock of tight mode in many tops - Google Patents

Abstract

The utility model relates to a multi-tightening tailstock. Dense balls are arranged between the body shell and the sleeve; Place the spring, the small hole at the rear end of the sliding sleeve is connected with the connecting shaft at the front end of the small shaft, and the screw rod at the rear of the small shaft is connected with the driving sleeve; a piston rod is installed in the middle of the body shell, and a transition sleeve is installed at the rear end of the piston rod. A supporting shaft is installed on the rear end surface of the lower part of the shell, and the connecting sleeve is slidably matched on the supporting shaft, and the driving sleeve, the transition sleeve and the sleeve are fixedly connected together through the connecting rod. The utility model adopts a dense ball tail frame structure, so that the movement precision of the sleeve is high and the guidance is good; a hydraulic cylinder is arranged in the body shell to realize the purpose of the hydraulic system driving the movement of the sleeve; a spring adjustment mechanism is added at the rear end of the sleeve to realize the workpiece The purpose of spring tightening is to meet the needs of different tailstock spring tightening forces. In addition, the addition of a guide rod mechanism makes the movement of the sleeve driven by the piston rod more stable and reliable.

Description

Multi-tightening tailstock

technical field

The utility model relates to a tailstock of a machine tool, in particular to a tailstock of multi-top tightening mode used for grinding and processing slender shaft workpieces.

Background technique

The tailstock of the machine tool is an important part that cooperates with the headstock to support and center the workpiece. Its center height, top position and structure of the joint surface with the worktable are the same as the headstock. The top tightening of the workpiece is realized by the movement of the tailstock sleeve, and the realization of its moving movement is divided into two types: manual and hydraulic. Generally, the tailstock of small and medium-sized cylindrical grinders uses the thrust of the spring to support the workpiece. If the spring force is too small, the workpiece will not be supported firmly, which will not only affect the grinding accuracy, but may even cause accidents; if the spring force is too large, it will cause Small workpieces or slender shafts are deformed, so when designing a tailstock, it is very important to correctly design and select a spring with a reasonable structural size. In addition, when the user needs to grind slender shafts of various specifications, due to the different sizes of the slender shafts, the required clamping force is also different. At this time, different tailstock spring clamping forces are required. In this case Under normal circumstances, the general tailstock jacking structure is not competent.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a tailstock with multiple jacking modes, which can choose hydraulic jacking mode or spring mode to jack the workpiece, and the jacking force of the spring can be adjusted.

The technical solution adopted by the utility model to solve its technical problems is: a tailstock with multi-top tightening mode, including a body shell, a sleeve, dense balls, a spring seat, a spring, a sliding sleeve, a small shaft, a driving sleeve, and a connecting rod , piston rod, transition sleeve, support shaft, sleeve, the upper part of the body shell is equipped with a sleeve and the tip, and dense balls are installed between the body shell and the sleeve to move the sleeve forward and backward; the rear end of the sleeve The spring seat is fixedly connected, the sliding sleeve is slidably connected in the spring seat, and the spring is placed between the spring seat and the sliding sleeve. connection; the middle part of the body shell is equipped with a piston rod, and the rear end of the piston rod is equipped with a transition sleeve. The connecting rods are fixedly connected together, and the axes of the small shaft, the piston rod and the support shaft are parallel to the axis of the sleeve.

The body shell is fixed on the workbench by two pressing blocks. The transition sleeve is compressed on the piston rod by a nut. Pad blocks are housed in the sliding sleeve.

The beneficial effect of the utility model is that the structure of the utility model first adopts a dense ball tailstock structure, so the sleeve moves lightly and flexibly, and at the same time, because the balls adopt interference fit, the movement precision is high and the guiding performance is good. Secondly, the structure of the hydraulic cylinder is designed in the tailstock body shell, and the piston rod is driven to move through the hydraulic system. The piston rod and the tailstock sleeve are connected together through the connecting rod to realize the purpose of the hydraulic system driving the sleeve to move. Compared with the manual tailstock, the tailstock has a higher degree of automation and is easy to use on highly automated machine tools. At the same time, the spring seat, sliding sleeve, spring, small shaft and other parts are added to the rear end of the tailstock sleeve to achieve the purpose of spring tightening of the workpiece, and the spring tightening force can be adjusted by rotating the small shaft to achieve Realize the requirements of different tailstock spring tensioning forces that meet the needs of users. In addition, the addition of a guide rod mechanism makes the movement of the tailstock sleeve driven by the piston rod more stable and reliable.

Description of drawings

Fig. 1 is the structural cross-sectional view of the tailstock of the multi-jack mode of the present utility model.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1, a multi-tightening tailstock includes a body shell 1, a sleeve 2, dense balls 3, a spring seat 4, a spring 5, a sliding sleeve 6, a cushion block 7, a small shaft 8, and a driving sleeve 9. Connecting rod 10, piston rod 11, transition sleeve 12, support shaft 13, sleeve 14.

The body shell 1 is fixed on the workbench by two pressing blocks. The top is installed in the sleeve 2, and the dense balls 3 are interposed between the body shell 1 and the sleeve 2, so that the sleeve 2 can move left and right to realize the top tightness of the workpiece. The movement of the sleeve 2 is light, flexible, high in precision and good in guiding. The spring seat 4 is fixed on the right end of the sleeve 2 by screws, and moves with the sleeve 2 simultaneously. The spring 5 is placed in the spring seat 4, and the spring 5 is pressed in the spring seat 4 by the sliding sleeve 6. Small shaft 8 front ends are inserted in the aperture of sliding sleeve 6, and the rear end of small shaft 8 is made of screw mandrel, and screw mandrel and driving sleeve 9 can realize relative movement. The spacer 7 is installed in the sliding sleeve 6 . Rotating the small shaft 8 can adjust the amount of movement between the sliding sleeve 6 and the spring seat 4 to adjust the compressed length of the spring 5, so as to obtain different spring clamping forces. The connecting rod 10 firmly connects the driving sleeve 9, the transition sleeve 12 and the sleeve 14 together. The transition sleeve 12 is compressed on the piston rod 11 by a nut, and the transition sleeve 12 is driven by the piston rod 11 to move. The support shaft 13 is fixed on the body shell, and the axis of the support shaft 13 is parallel to the ideal axis of the sleeve 2. When the sleeve 14 moves left and right on the support shaft 13, it plays the role of guiding and positioning the movement of the sleeve.

The use of the dense ball structure of the utility model makes the movement of the sleeve light and flexible, and at the same time, because the balls adopt interference fit, the movement precision is high and the guiding performance is good. When the method of hydraulically tightening the workpiece is needed, turn the small shaft clockwise. Since the piston rod does not move at this time, the connecting rod is still and the driving sleeve does not move, and the thread between the small shaft and the driving sleeve makes the small Axis moves to the left. After the piston rod moves to make the tip press against the workpiece, the sliding sleeve and the spring seat are pressed tightly, and the spring loses its effect. The hydraulic system provides the clamping force of the tip of the tailstock to the workpiece; Axis to move the minor axis to the right. After the piston rod moves so that the tip bears against the workpiece, there is a moving amount between the sliding sleeve and the spring seat. At this time, the spring is effective, and the compression length of the spring can be adjusted by adjusting the moving amount between the sliding sleeve and the spring seat, and different spring tension force. The support shaft is fixed on the body shell, and the axis of the support shaft is parallel to the ideal axis of the sleeve. When the sleeve moves left and right on the support shaft, it plays a role in guiding and positioning the movement of the sleeve.

Claims (4)

1. one kind, hold out against the tailstock of mode more, including body shell (1), sleeve (2), intensive ball (3), spring base (4), spring (5), slip cap (6), little axle (8), drive set (9), connecting rod (10), piston rod (11), spacer shell (12), supporting axle (13), set (14), it is characterized in that: described body shell (1) top is built with sleeve (2) and top, equipped with the intensive ball (3) making sleeve (2) forward and backward movement between body shell (1) and sleeve (2)；Described sleeve (2) rear end is fixing connects spring base (4), be slidably connected in spring base (4) slip cap (6), spring (5) is placed between spring base (4) and slip cap (6), the connection axle of the aperture of slip cap (6) rear end and little axle (8) front end is connected, and the screw mandrel at little axle (8) rear portion is connected with driving set (9)；Described body shell (1) middle part is built with piston rod (11), piston rod (11) rear end is equipped with spacer shell (12), equipped with supporting axle (13) on the rear end face of described body shell (1) bottom, the upper sliding connection set (14) of supporting axle (13), described drive set (9), spacer shell (12), set (14) be fixed together by connecting rod (10), and little axle (8), piston rod (11), supporting axle (13) axis parallel with the axis of sleeve (2).

2. the tailstock holding out against mode according to claim 1 more, it is characterised in that: described body shell (1) is fixing on the table by two compact heaps.

3. the tailstock holding out against mode according to claim 1 more, it is characterised in that: described spacer shell (12) is pressed on piston rod (11) by nut.

4. the tailstock holding out against mode according to claim 1 more, it is characterised in that: equipped with cushion block (7) in described slip cap (6).