A swivel head for a skewer center frame

Abstract

The utility model relates to a kind of oblique car center frame rotary top head in oblique bed center frame technical field, comprising: intermediate top head, axial sliding connection in center frame frame body;The intermediate top head head end is equipped with rotary top wheel, tail end is isosceles trapezoidal structure and is equipped with the driving equipment that drives its axial movement;Side top head, it has two, and respectively symmetrically distributed in the upper and lower sides of the intermediate top head;The side top head rotation is connected in center frame frame body, its head end is equipped with rotary top wheel, tail end is equipped with follower wheel, to facilitate under the slope effect of the isosceles trapezoidal structure Outward movement;The utility model is through the slope cooperation of isosceles trapezoidal structure and follower wheel in intermediate top head tail end, by driving equipment drives the axial movement of intermediate top head, while, two side top heads also act, so that three rotary top wheels clamp workpiece, for the workpiece of same diameter, it can improve clamping efficiency, also can improve the consistency of clamping force.

Description

Technical Field

[0001] This utility model relates to the field of slant bed center frame technology, and in particular to a rotating mandrel for a slant bed center frame. Background Technology

[0002] The slant bed lathe is a high-precision, high-efficiency automated machine tool. Equipped with a multi-station turret or power turret, it possesses a wide range of machining capabilities, capable of processing straight cylinders, slanted cylinders, arcs, and various complex workpieces such as threads, grooves, and worm gears. If the workpiece has a large length-to-diameter ratio and low rigidity, a center rest is required for support. This reduces the degree of bending deformation of the workpiece under external forces during machining, thereby minimizing the impact on the machining accuracy.

[0003] Existing lathe center rests generally consist of a center rest body (C-type seat) and three mandrel / support devices arranged along its circumference. For example, Chinese patent application CN104668976A discloses a lathe center rest and Chinese patent application CN111958269B discloses a slant bed center rest. Although this device can hold the workpiece by clamping it with three mandrels, the three mandrels are independently adjustable, the adjustment efficiency needs to be improved, and it is difficult to ensure the consistency of the clamping force on the workpiece.

[0004] To address this, we designed a slant car center frame rotating mandrel. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a rotating mandrel for a slant car center frame.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A slant car center frame rotating mandrel includes:

[0008] The intermediate top head is slidably connected to the central frame body along the axial direction; the intermediate top head is provided with a rotating top wheel at its head end and an isosceles trapezoidal structure at its tail end and is provided with a drive device to drive its axial movement.

[0009] There are two side tops, which are symmetrically distributed on the upper and lower sides of the middle top; the side tops are rotatably connected to the central frame, and the front end is provided with a rotating top wheel and the rear end is provided with a follower wheel, so as to move outward under the action of the inclined surface of the isosceles trapezoidal structure;

[0010] A spring, located between the two side tops, is used to pull the tail end of the side tops so that the closed follower wheel always engages with the inclined surface of the isosceles trapezoidal structure.

[0011] Furthermore, the intermediate top has a through hole running vertically through it, through which the spring moves.

[0012] Furthermore, the spring is a tension spring, and it is connected to the position of its tail end corresponding to the central axis of the side top head.

[0013] Furthermore, a fixed wheel seat is fixedly installed at the head end of the intermediate top head, and a corresponding rotating top wheel is installed on the rotating top wheel through a pin shaft.

[0014] Furthermore, the head end of the side top head is slidably connected to an adjustable wheel seat along its tangential direction, and the adjustable wheel seat is equipped with a corresponding rotating top wheel via a pin.

[0015] The side top end is provided with an adjusting stud along its tangential direction. The adjusting stud is rotatably connected to the side top or the adjustable wheel seat, and is threadedly engaged with the adjustable wheel seat or the side top.

[0016] Furthermore, the adjustable wheel seat is provided with a sliding column, and the side top is provided with a slide rail that cooperates with the sliding column.

[0017] Furthermore, the rotating top wheel is rotatably connected to the pin shaft via a bearing.

[0018] Furthermore, the inclined surface of the isosceles trapezoidal structure is provided with a raceway along its length to cooperate with the follower wheel.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. By using the isosceles trapezoidal structure at the tail end of the middle mandrel and the inclined surface of the follower wheel, the middle mandrel is driven to move axially by the drive device, and the two side mandrels also move accordingly, so that the three rotating top wheels clamp the workpiece. For workpieces of the same diameter, this can improve both clamping efficiency and the consistency of clamping force.

[0021] 2. The adjustable wheel seat at the head end of the side top head cooperates with the adjusting stud. By rotating the adjusting stud, the rotating top wheel can be driven to move along the slide, realizing rapid fine adjustment of the clamping position, adapting to the processing needs of workpieces of different diameters, without the need to disassemble or replace parts, thus increasing versatility. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the second structure of this utility model;

[0024] Figure 3 This is a front view of the second structure of this utility model;

[0025] Figure 4 for Figure 3 AA section view;

[0026] Figure 5 This is a diagram showing the second structure of this utility model after it is assembled with the central frame.

[0027] In the diagram: 1. Central top head; 11. Hole; 12. Raceway; 2. Rotating top wheel; 3. Drive device; 4. Side top head; 41. Slide rail; 5. Follower wheel; 6. Spring; 7. Fixed wheel seat; 8. Adjustable wheel seat; 81. Sliding column; 9. Adjusting stud; 10. Bearing. Detailed Implementation

[0028] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0029] Example 1, in conjunction with Appendix Figure 1 A rotating mandrel for a slant car center frame includes a central mandrel 1, a side mandrel 4, and a spring 6.

[0030] The intermediate top head 1 is slidably connected to the central frame body (not shown in the figure) along the axial direction, that is, the intermediate top head 1 can move relative to the central frame body along its own axial direction. A fixed wheel seat 7 is fixedly installed at its head end, and a rotating top wheel 2 is installed through a pin. The rotating top wheel 2 is rotatably connected to the pin through a bearing 10.

[0031] The tail end of the intermediate mandrel 1 is designed as an isosceles trapezoidal structure, and the inclined surface of the trapezoidal structure has a raceway 12 along the length direction for cooperating with the follower wheel 5. The tail end of the intermediate mandrel 1 is connected to a drive device 3, such as a hydraulic cylinder, servo motor or pneumatic cylinder, which can push the intermediate mandrel 1 to move axially.

[0032] There are two side top heads 4. The two side top heads 4 are symmetrically distributed on the upper and lower sides of the middle top head 1, and are rotatably connected to the central frame body through a rotating shaft.

[0033] The head end of the side top head 4 is provided with an adjustable wheel seat 8, and a rotating top wheel 2 is installed through a pin. The rotating top wheel 2 is rotatably connected to the pin through a bearing 10.

[0034] A follower wheel 5 is installed at the tail end of the side top head 4, and the follower wheel 5 contacts the raceway 12 of the middle top head 1.

[0035] Spring 6 consists of two independent tension springs, which are symmetrically arranged on the upper and lower sides of the middle top 1.

[0036] One end of the spring 6 is fixedly connected to the side of the intermediate top head 1, and the other end is connected to the corresponding side top head 4. The tension of the spring 6 ensures that the follower wheel 5 is always in close contact with the raceway 12 of the intermediate top head 1, ensuring that the head of the side top head 4 is in an open state for easy loading and unloading.

[0037] Working principle:

[0038] When the drive device 3 pushes the intermediate mandrel 1 to move axially toward the workpiece, the isosceles trapezoidal structure at its tail end squeezes the follower wheel 5 through the inclined plane, forcing the two side mandrels 4 to swing outward around the axis of rotation, thereby driving the rotating top wheel 2 to clamp the workpiece.

[0039] When the drive device 3 retracts, the tension of the two springs 6 pulls the tail end of the side top head 4 inward, causing the follower wheel 5 to reset along the raceway 12, and the rotating top wheel 2 to release the workpiece.

[0040] Example 2, in conjunction with Appendix Figure 2-5 A rotating top head for a slant car center frame, which differs from Embodiment 1 in that: the middle top head 1 is provided with a through hole 11, which is located near the isosceles trapezoidal structure.

[0041] In this embodiment, the spring 6 is a single tension spring that passes through the hole 11 in the central top head 1 and is connected to two side top heads 4 at both ends. Preferably, the spring 6 is connected to a position near the tail end of the side top head 4.

[0042] Example 3, in conjunction with Appendix Figure 3-4 A type of inclined car center frame rotating top head, based on embodiment one or two: the side top head 4 is provided with a slide 41 along its tangential direction at its head end.

[0043] The adjustable wheel seat 8 is slidably connected to the slide rail 41 via a sliding pin 81, and its position is adjusted by an adjusting stud 9. The adjusting stud 9 is rotatably connected to the side top head 4 and threadedly engaged with the adjustable wheel seat 8. Rotating the adjusting stud 9 drives the adjustable wheel seat 8 to move along the slide rail 41, thereby adjusting the clamping position of the rotating top wheel 2. In other words, the position of the adjustable wheel seat 8 can be finely adjusted by adjusting the adjusting stud 9 to meet the clamping requirements of workpieces with different diameters.

[0044] In other embodiments, the adjusting stud 9 is rotatably connected to the adjustable wheel seat 8 and threadedly engaged with the side top head 4. Rotating the adjusting stud 9 can drive the adjustable wheel seat 8 to move along the slide 41, thereby adjusting the clamping position of the rotating top wheel 2.

[0045] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A swaged mandrel rotating adapter, comprising: include: The intermediate top head (1) is slidably connected to the central frame body along the axial direction; the intermediate top head (1) is provided with a rotating top wheel (2) at the head end and an isosceles trapezoidal structure at the tail end and is provided with a driving device (3) to drive its axial movement. The side top head (4) has two, which are symmetrically distributed on the upper and lower sides of the middle top head (1); the side top head (4) is rotatably connected to the central frame body, and its head end is provided with a rotating top wheel (2) and its tail end is provided with a follower wheel (5) so as to move outward under the action of the inclined surface of the isosceles trapezoidal structure; A spring (6) is located between the two side tops (4) to pull the tail end of the side tops (4) so ​​that the closed follower wheel (5) always engages with the inclined surface of the isosceles trapezoidal structure.

2. The inclined plane center frame rotating mandrel according to claim 1, characterized in that: The middle top (1) has a through hole (11) running vertically through it, and the spring (6) moves through the hole (11).

3. A slant car center frame rotating mandrel according to claim 1 or 2, characterized in that: The spring (6) is a tension spring and is connected to the position of its tail end corresponding to the central axis of the side top head (4).

4. The inclined car center frame rotating mandrel according to claim 1, characterized in that: The intermediate top head (1) is fixedly mounted with a fixed wheel seat (7), and the rotating top wheel (2) is mounted with a corresponding rotating top wheel (2) through a pin.

5. A slant car center frame rotating mandrel according to claim 1, characterized in that: The side top head (4) is slidably connected to an adjustable wheel seat (8) along its tangential direction. The adjustable wheel seat (8) is equipped with a corresponding rotating top wheel (2) via a pin. The side top head (4) is provided with an adjusting stud (9) along its tangential direction at its head end. The adjusting stud (9) is rotatably connected to the side top head (4) or the adjustable wheel seat (8) and is threadedly engaged with the adjustable wheel seat (8) or the side top head (4).

6. A slant car center frame rotating mandrel according to claim 5, characterized in that: The adjustable wheel seat (8) is provided with a sliding column (81), and the side top head (4) is provided with a slide rail (41) that cooperates with the sliding column (81).

7. A slant car center frame rotating mandrel according to claim 4 or 5, characterized in that: The rotating top wheel (2) is rotatably connected to the pin shaft via a bearing (10).

8. A slant car center frame rotating mandrel according to claim 1, characterized in that: The inclined surface of the isosceles trapezoidal structure is provided with a raceway (12) along its length direction to cooperate with the follower wheel (5).

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