CN116493973A - A kind of fixture with rotating function - Google Patents

Abstract

The invention discloses a tooling fixture with a rotating function, which comprises a base and a turntable whose center of rotation is positioned, the turntable is capable of rotating along the center of turn on the base, and a clamping device for fixing workpieces is arranged on the turntable , between the base and the turntable is provided with an elastic support device that can drive the turntable to lift, the elastic support device includes rolling elements that can provide rolling friction for the rotation of the turntable, and between the turntable and the base A locking device that can press the turntable on the base and drive the rolling parts back into the elastic support device; the tooling fixture adopting this technical solution, because the elastic support device is arranged between the turntable and the base, the elastic support device can be used when the turntable rotates. Provide support for the turntable and provide rolling friction, and in the locked state of the turntable, the elastic support device is compressed to make the opposite planes of the turntable and the base contact, ensuring reliable locking of the turntable and guaranteed flatness.

Description

A kind of fixture with rotating function

technical field

The present invention relates to work fixtures.

Background technique

Tooling fixtures provide clamping for parts during machining to facilitate equipment processing. Some parts need to process multiple surfaces of parts in general bed processing. When using traditional tooling fixtures for processing, it is necessary to continuously clamp the workpiece to adjust the position of the workpiece. Make the surface of the workpiece to be processed in the processing position. However, the secondary clamping of the workpiece is not only prone to errors, but also takes time and effort. Therefore, a tooling fixture with a rotary function is designed for this workpiece that needs to be processed on multiple surfaces. By rotating The turntable adjusts the position of the surface to be processed of the workpiece. The traditional frictional contact between the turntable and the base results in large resistance during rotation and inconvenient operation. Therefore, it is necessary to improve the smoothness of the turntable's rotation, such as a multi-station milling rotary fixture disclosed in patent 201620519683.6 , including a fixed base and a rotating table, the rotating table is set on the fixed base through bearings and rotating pins, although the rotation resistance of the rotating turntable is reduced, but because the bottom surface of the rotating table does not contact the top surface of the fixed base, the locking of the turntable is unstable and difficult Leveling.

Contents of the invention

In order to solve the problem of large rotation resistance of the turntable in the prior art and the unstable locking state of the turntable and the base, the technical solution adopted in the present invention is:

A tool fixture with a rotating function, comprising a base and a turntable positioned at the center of rotation, the turntable can rotate along the center of rotation on the base, a clamping device for fixing a workpiece is arranged on the turntable, and the An elastic support device that can drive the turntable to lift is provided between the base and the turntable. The elastic support device includes rolling elements that can provide rolling friction for the rotation of the turntable. A locking device that tightens on the base and drives the rolling element back into the elastic support device.

Further, a positioning structure for positioning the rotation angle of the turntable is also provided between the turntable and the base; the positioning structure is a pin hole and a pin or a keyway and a key.

Further, the elastic support device is arranged on the turntable or the base, and a mounting groove for the elastic support device to be embedded is arranged on the turntable or the base.

Further, the elastic support device includes an elastic member, the rolling member is a plane bearing, and the axis of the plane bearing is coaxial with the rotation center of the turntable.

Further, the elastic supporting device is provided with a group along the circumference of the center of rotation, and the elastic supporting device includes a mounting sleeve, and a movable sleeve for installing rolling elements is floatingly arranged in the mounting sleeve. The sleeve is provided with an elastic piece that drives the movable sleeve to protrude from the movable sleeve. An adjusting piece for adjusting the compression of the elastic piece is provided on the installation sleeve. bit pieces.

Further, the locking device is a shaft and a pressing block arranged at the center of the turntable.

Further, the locking device includes a set of pull rods, each of which is provided with a pressure block arranged in the circumferential direction of the base, and each of the pull rods is threadedly connected with a nut that drives the pressure block to be folded, and each of the pull rods Linkages are hinged between the pull rods; crimping parts are provided at both ends of the press block, and crimping grooves that cooperate with the crimping parts are arranged on the turntable and the base, and at least one of the crimping parts The buckling groove which is wedge-shaped and matched with the wedge-shaped buckling part has an inclined surface.

The tooling fixture adopting this technical solution, since an elastic supporting device is arranged between the turntable and the base, when the turntable rotates, the elastic supporting device provides support for the turntable and provides rolling friction, and when the turntable is locked, the elastic supporting device is compressed so that The relative planes of the turntable and the base are in contact to ensure that the turntable is locked reliably and the flatness can be guaranteed.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a sectional view of Fig. 1;

Fig. 3 is a schematic diagram of the structure of the first embodiment of the elastic support device of the present invention and the first embodiment of the positioning structure of the rotary center of the turntable;

Fig. 4 is a schematic diagram of the structure of the second embodiment of the elastic support device of the present invention and the second embodiment of the positioning structure of the rotary center of the turntable;

Fig. 5 is the structure schematic diagram of embodiment 2 of the elastic supporting device of the present invention, wherein (a) is an exploded view, and (b) is a cross-sectional view;

6 is an overall schematic diagram of the structure of the locking device of the present invention;

Fig. 7 is a partial sectional view of the locking device in Fig. 6 .

Detailed ways

In order to better understand the concept of the present invention, the technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The fixture shown in Figure 1 includes a base 1, on which a turntable 2 is arranged, and on the turntable 2, a clamping device 3 is arranged, and the clamping device 3 is used to clamp the workpiece A on the turntable 2, when the turntable 2 rotates Drive the workpiece to rotate synchronously.

As shown in Figure 2, the clamping device 3 includes a fixed shaft 3-1 installed on the turntable 2, one end of the fixed shaft 3-1 protrudes from the upper end surface of the turntable 2, and the position where the fixed shaft 3-1 extends out of the upper end surface of the turntable 2 A pressing plate 3-2 is provided, and the pressing plate 3-2 can press and fix the workpiece on the turntable 2 through the nut 3-3. Of course, only one embodiment is shown in the drawings, and a pneumatic Jaws, etc. are used as clamping devices to fix clamping parts.

In order to keep the center of rotation of the turntable 2 from changing, as shown in Figures 2 and 4, a positioning shaft 7 is provided on the base 1, and the positioning shaft 7 penetrates into the turntable 2 so that the turntable can rotate around the positioning shaft 7. In this embodiment, the positioning The shaft 7 is fixedly connected with the turntable 2 so that the positioning shaft 7 rotates in the base 1. In order to avoid wear and tear, a shaft sleeve 7-1 is arranged between the positioning shaft 7 and the base 1. In this structure, the positioning shaft 7 and the fixed shaft 3- 1 can be taken as a whole. Of course, the positioning shaft 7 can also be fixed with the base 1 so that the turntable 2 can rotate around the positioning shaft 7. In order to avoid displacement between the fixed shaft 3-1 and the workpiece for clamping the workpiece, or to loosen the workpiece when rotating the turntable, this When the fixed shaft 3-1 is not integrated with the positioning shaft 7, it is arranged in the turntable 2. In addition to the way of positioning the center of rotation of the turntable through the positioning shaft 7 given in Figures 2 and 4, as shown in Figure 3, a rib 8 can be provided on the edge of the base 1 to constrain the circumference of the turntable 2 so as to locate the center of rotation of the turntable .

In order to make the turntable 2 rotate with less resistance and more smoothly, an elastic support device 4 is arranged between the turntable 2 and the base 1. The elastic support device 4 can be arranged on the turntable 2 or the base 1, and is elastic when the turntable 2 is in a rotating state. The support device 4 provides a support for the turntable, so that the bottom surface of the turntable 2 does not contact the top surface of the base 1 to reduce friction, and the elastic support device 4 can provide rolling friction for the turntable 2, so that the resistance when rotating the turntable 2 is smaller Rotation is smoother. A locking device 5 is also provided between the base 1 and the turntable 2, and the locking device 5 can apply pressure to the turntable 2 to compress the elastic support device 4 back into the base 1 or the turntable 2 so as to eliminate the gap between the turntable 2 and the base 1. distance between the bottom surface of the turntable 2 and the top surface of the base 1, so that the turntable 2 is locked to the base 1 to prevent it from rotating under the action of external force. On the one hand, the bottom surface of the turntable 2 and the top surface of the base 1 can provide Larger frictional force, in addition, the top surface of the base 1 can provide plane support for the turntable 2 to ensure the flatness of the turntable 2 .

The elastic support device 4 includes a rolling element 4-1 that provides rolling friction for the rotary motion of the turntable 2. In the embodiment shown in FIG. An elastic piece 4-2 is arranged in the installation groove 9. In this embodiment, the elastic piece 4-2 is a spring piece. After assembly, the plane bearing and the spring piece are embedded in the installation groove 9, and the plane bearing is detached from the installation groove 9 by the action of the spring piece. , and then drive the turntable 2 to lift to separate the bottom surface of the turntable 2 from the top surface of the base 1, so that the turntable 2 rotates on the plane bearing, and the rolling friction provided by the plane bearing reduces the rotation resistance of the turntable. It is also necessary to pay attention to the plane The center of the bearing needs to keep coincident with the center of rotation of the turntable 2.

Or as shown in Figure 4 and Figure 5, a group of elastic supporting devices 4 is arranged around the center of rotation of the turntable, each elastic supporting device 4 includes a mounting sleeve 4-3, and a movable sleeve 4-4 is arranged in the mounting sleeve 4-3 With the elastic part 4-2, the bottom of the movable sleeve 4-4 is subject to the force of the elastic part 4-2 and has a tendency to break away from the installation sleeve, and the rolling part 4-1 is installed on the installation sleeve 4-3. In order to prevent the movable sleeve 4-4 from breaking away from the installation sleeve 4-3, and to limit the height of the installation sleeve 4-3, a limiter 4-6 is set on the installation sleeve 4-3, and the movable sleeve 4-4 A limit groove 4-61 is provided, and the limit of the movable sleeve 4-4 is realized by snapping the limit piece 4-6 into the limit groove 4-61. In order to improve the elastic force of the elastic member 4-2, an adjustment member 4-5 is provided at the bottom of the installation sleeve 4-3. The adjustment member 4-5 is a nut, and the compression amount of the elastic member 4-2 can be adjusted by screwing the nut to improve The elastic force of the elastic part, when the weight of the turntable 2 or the installed parts is large, offset the elastic force of the elastic part 4-2, it is necessary to increase the elastic force of the elastic part 4-2 to lift the turntable 2, that is, to realize the adjustment of the elastic part by adjusting the part 4-5 4-2 compression adjustment improves bounce. The rolling element 4-1 in this embodiment is a bearing, and balls can also be used as the rolling element 4-1.

In order to be able to grasp the rotation angle of the turntable 2 conveniently, a positioning structure 6 is arranged between the turntable 2 and the base 1. The positioning structure 6 shown in FIG. Set a group of keyways according to the division, when the turntable 2 needs to turn over a certain angle, make the corresponding keyway on the turntable 2 opposite to the corresponding keyway on the base and use the key to snap into the keyway for positioning, and this positioning structure 6 can cooperate with the lock The tightening device 5 further provides locking for the turntable 2 to prevent the turntable 2 from rotating during the processing of parts. In addition to the embodiment shown in the figure, the positioning and locking of the turntable can also be realized by the cooperation of pins and pin holes.

In order to enable the turntable 2 to be locked on the base 1, a locking device 5 is provided between the base 1 and the turntable 2. The locking device shown in Figures 1, 2, 6 and 7 includes a set of pull rods 5-1, the pull rod 5-1 is placed in the base 1 and one end passes through the side of the base 1, and one end of the pull rod 5-1 in the base 1 is hinged together through the linkage 5-4. In this embodiment, the linkage 5-4 is a ring, and the pull rod One end of 5-1 in the base 1 is hinged on the ring, and when one of the pull rods 5-1 moves axially, it can drive the other pull rods 5-1 to move axially through the linkage 5-4, of course The linkage 5-4 can also be a connecting rod or a flexible rope, etc., and one end of the pull rod 5-1 protruding from the base 1 is provided with a briquetting block 5-2 and is threadedly connected with a nut 5-3. When the nut 5-3 is screwed, it will The pressure block 5-2 is made to approach the base 1 and the turntable 2 axially along the pull rod 5-1, so when one of the nuts 5-3 is screwed, the other pull rods 5-1 can be driven to drive each pull rod due to the action of the linkage 5-4 The briquetting block 5-2 on the 5-1 is close to the base 1 and the turntable 2, so as to achieve the effect of fast locking, and the turntable 2 and the base 1 are respectively provided with a detaining groove 5-6, and at both ends of each briquetting block 5-2 As for the withholding part 5-5 in the detaining groove 5-6 is provided, the detaining part 5-5 is wedge-shaped and the detaining groove 5-6 is provided with an inclined surface matched with it. When the pressing block 5-2 moves closer to the base 1, the detaining part The 5-5 wedge-shaped structure squeezes the inclined surface of the holding groove 5-6 so that the turntable 2 is pressed against the base 1 to achieve locking. In this embodiment, the crimping portions 5-5 are all wedge-shaped and the crimping grooves 5-6 also have inclined surfaces. In theory, one crimping portion 5-5 in each pressing block 5-2 can be wedge-shaped and cooperate with the crimping grooves. 5-6 has an inclined surface, for example, the crimping portion 5-5 on one side of the turntable 2 is wedge-shaped, and the holding groove 5-6 on the turntable has an inclined surface to realize pressing the turntable 2 on the base 1. Of course, in addition to the locking device 5 provided in the accompanying drawings, it is also possible to lock the turntable 2 and the base 1 by using a shaft passing through the center of rotation of the turntable and a pressure block, that is, a shaft is fixed on the base (1), and the turntable cover Set on the shaft and take the shaft as the center of rotation, set a pressure block and a nut on the top of the shaft to lock the turntable 2 and the base 1 through the lock nut.

Claims (7)

1. A tooling fixture with a rotating function, comprising a base (1) and a turntable (2) positioned at the center of revolution, the turntable (2) can rotate along the center of revolution on the base (1), in the The turntable (2) is provided with a clamping device (3) for fixing the workpiece, which is characterized in that: an elastic support device ( 4), the elastic supporting device (4) includes a rolling element (4-1) that can provide rolling friction for the rotation of the turntable (2), and a device capable of Press the turntable (2) on the base (1) and drive the rolling element (4-1) to retract to the locking device (5) in the elastic support device (4). 2. A tooling fixture with a rotating function according to claim 1, characterized in that: a positioning structure for positioning the rotation angle of the turntable (2) is also provided between the turntable (2) and the base (1) ; The positioning structure (6) is a pin hole and a pin or a keyway and a key. 3. A tooling fixture with a rotating function according to claim 1, characterized in that: the elastic support device (4) is arranged on the turntable (2) or the base (1), on the turntable ( 2) or the base (1) is provided with an installation groove (9) for the elastic support device (4) to be embedded in. 4. A tooling fixture with a rotating function according to claim 3, characterized in that: said elastic supporting device (4) comprises an elastic piece (4-2), and said rolling piece (4-1) It is a plane bearing and the axis of the plane bearing is coaxial with the rotary center of the turntable. 5. A tool fixture with a rotating function according to claim 3, characterized in that: said elastic support device (4) is provided with a group along the circumference of the center of rotation, and said elastic support device (4) includes The installation sleeve (4-3), the movable sleeve (4-4) for installing the rolling element (4-1) is floatingly arranged in the installation sleeve (4-3), and the installation sleeve (4-3) ) is provided with an elastic piece (4-2) that drives the movable sleeve (4-4) out of the movable sleeve (4-4), and an elastic piece (4-2) is provided on the installation sleeve (4-3). 2) For the adjusting part (4-5) of the compression amount, a limiting part (4-6) is arranged on the installation sleeve (4-3) to limit the protruding length of the movable sleeve (4-4). 6. A work fixture with a rotating function according to claim 1, characterized in that: said locking device (5) is a shaft and a pressing block arranged at the center of the turntable (2). 7. A tool fixture with a rotating function according to claim 1, characterized in that: the locking device (5) comprises a set of pull rods (5-1), each of the pull rods (5-1) ) is provided with a briquetting block (5-2) arranged in the circumferential direction of the base (1), and a nut (5-2) that drives the briquetting block (5-2) to fold is screwed on each of the pull rods (5-1) 3), a linkage (5-4) is hinged between each of the pull rods (5-1); a crimping portion (5-5) is provided at both ends of the pressure block (5-2), and Both the turntable (2) and the base (1) are provided with holding grooves (5-6) that cooperate with the crimping parts (5-5), at least one of the crimping parts (5-5) is wedge-shaped and The buckling groove (5-6) matched with the wedge-shaped buckling part (5-5) has an inclined surface.