CN214560223U

CN214560223U - Quick clamping device suitable for cylindrical workpiece

Info

Publication number: CN214560223U
Application number: CN202120267114.8U
Authority: CN
Inventors: 王磊; 聂强
Original assignee: Lian Wei Auto Parts Chonqging Co ltd
Current assignee: Lian Wei Auto Parts Chonqging Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-11-02
Anticipated expiration: 2031-01-29

Abstract

The utility model discloses a quick clamping device for cylinder work piece, including the base plate, be provided with three eccentric grip block on this base plate, three eccentric grip block is connected with the pivot respectively, and the pivot is rotated and is inserted and establish on the base plate, and is three enclose into the centre gripping district between the eccentric grip block, and three pivot is equipped with sleeve subassembly outward, is equipped with drive mechanism between this sleeve subassembly and the three pivot, and this sleeve subassembly acts on the pivot through drive mechanism and in order to drive threely the equidirectional synchronous rotation of eccentric grip block is equipped with canceling release mechanical system between every pivot and the base plate respectively. The utility model has the advantages that: the eccentric clamping block is driven to rotate through the sleeve component, the size of a clamping area is changed, and therefore the eccentric clamping block plays an interference clamping role on a clamped cylindrical workpiece, the clamped cylindrical workpiece is clamped rapidly, and the structural design of the eccentric clamping block can also adapt to different cylindrical workpieces with fluctuating outer diameters.

Description

Quick clamping device suitable for cylindrical workpiece

Technical Field

The utility model belongs to the technical field of detect the frock, concretely relates to quick clamping device suitable for cylinder work piece.

Background

When the cylindrical workpiece is subjected to torque detection, stable clamping is not easy to realize, and the method is especially suitable for small-size workpieces. Conventional collet chuck devices also have difficulty gripping certain workpieces because the optimum gripping area of the collet, which is spaced from the end face of the collet, may interfere with the portion of the workpiece other than the cylindrical portion of the workpiece and fail to grip the workpiece, or the overlap of the optimum gripping area and the cylindrical portion is short and unstable. For example, patent document CN2089859U discloses a quick-tightening, quick-loosening and high-efficiency chuck without using a wrench, which includes a parallelogram mechanism composed of three eccentric sleeves, a body, a connecting plate and three eccentric camshafts, and drives three cams with the same curved surface to rotate in the same direction, and the cams clamp cylindrical objects to be clamped and then self-lock. The structure processing has great difficulty, and the end part of the eccentric sleeve exceeds the cam, so that the clamped workpiece is influenced to enter between the cams, and the device is not suitable for detecting the workpiece with the cylinder.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a quick clamping device suitable for cylinder work piece.

The technical scheme is as follows:

the rapid clamping device is characterized by comprising a base plate, wherein three eccentric clamping blocks are arranged on the base plate, the three eccentric clamping blocks are respectively connected with a rotating shaft, the rotating shafts are rotatably inserted on the base plate, and the rotating shafts are arranged in parallel and distributed in a triangular shape, so that a clamping area is defined between the three eccentric clamping blocks;

sleeve assemblies are arranged outside the three rotating shafts, transmission mechanisms are arranged between the sleeve assemblies and the three rotating shafts, and the sleeve assemblies act on the rotating shafts through the transmission mechanisms to drive the three eccentric clamping blocks to synchronously rotate in the same direction;

and a reset mechanism is respectively arranged between each rotating shaft and the substrate.

Design more than adopting, its advantage lies in driving eccentric grip block through sleeve subassembly and rotates, changes the size in centre gripping district to make eccentric grip block play the interference clamping action to the cylinder work piece by the centre gripping, thereby press from both sides it tightly rapidly, the structural design of eccentric grip block can also adapt to the undulant different cylinder work pieces of external diameter, sleeve subassembly's turning force is relieved the back, and eccentric grip block is automatic re-setting under canceling release mechanical's drive.

As a preferred technical solution, the transmission mechanism includes a gear and a ring gear that are engaged with each other;

each rotating shaft is fixedly sleeved with one gear, the three gears are meshed with the same gear ring, and the gear ring surrounds all the gears;

the gear ring is externally provided with a sleeve assembly with adjustable holding inner diameter, and the sleeve assembly holds the gear ring.

By adopting the design, the gear ring is rotated through the sleeve component, so that the three gears meshed with the gear ring synchronously rotate.

As a preferred technical solution, the reset mechanism includes a torsion spring, the torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively fixed on the base plate and the gear.

By adopting the design, the structure is simple and reliable, and the torsion spring can enable the rotating shaft and the eccentric clamping block to automatically reset after the rotating acting force is relieved.

As a preferred technical scheme, the gear and the gear ring are both positioned between the base plate and the eccentric clamping block;

the base plate is provided with a mounting hole facing the face of the gear, the torsional spring is arranged in the mounting hole, and two ends of the torsional spring are respectively abutted against the inner wall of the mounting hole and the gear.

By adopting the design, the installation of the torsion spring is convenient, and the interference of the outside to the torsion spring is prevented.

As a preferred technical scheme, the sleeve component comprises an inner cylinder and an outer cylinder which are nested with each other, at least two sliding block holes radially penetrate through the inner cylinder, all the sliding block holes are distributed annularly, and a holding sliding block is arranged in each sliding block hole;

the inner side surfaces of all the holding sliding blocks abut against the outer wall of the gear ring to hold the gear ring, and the outer side surfaces of the holding sliding blocks are matched with the inclined wedges on the inner wall of the outer cylinder;

the outer cylinder is in threaded fit with the inner cylinder.

By adopting the design, the size of the internal diameter of the sleeve assembly is conveniently changed by adjusting the outer sleeve, the clamping assembly inside the sleeve assembly can be replaced, and different clamping assemblies can be used for clamped objects of different models.

As a preferred technical scheme, a positioning groove is formed in the inner side face of the holding sliding block, a positioning convex strip is integrally formed on the outer wall of the gear ring, and the positioning convex strip corresponds to the positioning groove one to one.

As a preferred technical scheme, one end of the inner cylinder is attached to the base plate, the end part of the inner cylinder is penetrated with the sliding block hole, the sliding block hole penetrates out of the end part of the inner cylinder, and the inner wall of the sliding block hole is provided with an anti-falling lug which extends inwards;

the shape of the holding sliding block is matched with that of the sliding block hole, and the holding sliding block holds the gear ring after extending out of the end part of the inner cylinder;

the inner side face of one end, extending out of the inner cylinder, of the holding sliding block corresponds to the base plate and the gear ring and is provided with an avoiding step.

By adopting the design, the holding sliding block is prevented from being separated.

Compared with the prior art, the beneficial effects of the utility model are that: drive eccentric grip block through sleeve subassembly and rotate, change the size in centre gripping district to make eccentric grip block play the interference clamping action to the cylinder work piece by the centre gripping, thereby press from both sides it tightly rapidly, the structural design of eccentric grip block can also adapt to the undulant different cylinder work pieces of external diameter, and the back is removed to sleeve subassembly's turning force, and eccentric grip block is automatic re-setting under canceling release mechanical system's drive.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a front view of the present invention;

fig. 3 is a top view of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is an enlarged view of the portion m of FIG. 4;

fig. 6 is a schematic structural view of the sleeve assembly.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

As shown in fig. 1 to 3, a fast clamping device suitable for a cylindrical workpiece includes a substrate 1, three eccentric clamping blocks 2 are arranged on the substrate 1, the three eccentric clamping blocks 2 are respectively connected with a rotating shaft 3, the rotating shaft 3 is rotatably inserted on the substrate 1, and the rotating shafts 3 are arranged in parallel and are distributed in a triangular shape, so that a clamping area is defined between the three eccentric clamping blocks 2. The substrate 1, the eccentric clamping block 2 and the rotating shaft 3 form a clamping assembly. Three be equipped with sleeve subassembly outside the pivot 3, this sleeve subassembly and three be equipped with drive mechanism between the pivot 3, this sleeve subassembly passes through drive mechanism acts on pivot 3 is in order to drive three 2 syntropy synchronous rotations of eccentric centre gripping piece, every pivot 3 with be equipped with canceling release mechanical system respectively between the base plate 1. The eccentric clamping blocks 2 are cylindrical, and the diameter of an inscribed circle between the side walls of the circumferential surfaces of the three eccentric clamping blocks 2 is equal to the diameter of a cylindrical workpiece which can be clamped by the clamping area.

In order to facilitate the processing and prevent the eccentric phenomenon during the clamping. The distances between every two of the three rotating shafts 3 are equal, and the three rotating shafts are circumferentially and uniformly distributed around the clamping area. When the sleeve component drives the rotating shaft 3 to rotate to any position, the distances from the three eccentric clamping blocks 2 to the central line of the clamping area are equal.

In the initial state, the side wall of the eccentric clamping block 2 with the minimum distance from the axis of the rotating shaft 3 faces the center of the clamping area. At this time, the diameter of an inscribed circle between the circumferential side walls of the three eccentric clamping blocks 2 is the largest, and the inscribed circle is the largest cylindrical workpiece which can be clamped by the clamping assembly. When the side wall of the eccentric clamping block 2 with the largest distance from the axial lead of the rotating shaft 3 faces the center of the clamping area, the diameter of an inscribed circle between the side walls of the circumferential surfaces of the three eccentric clamping blocks 2 is the smallest cylindrical workpiece which can be clamped by the clamping assembly. In this embodiment, the diameter deviation between the minimum cylindrical workpiece and the maximum cylindrical workpiece is 2-3 mm.

The cylindrical workpiece to be clamped extends into the clamping area, then the sleeve assembly is rotated to drive the three eccentric clamping blocks 2 to synchronously rotate in the same direction, and the side wall, which is far away from the axis of the rotating shaft 3 and has a larger distance, of the eccentric clamping blocks 2 turns to the center of the clamping area, so that the clamping area is reduced, interference clamping is generated on the cylindrical workpiece, and the cylindrical workpiece is clamped tightly.

Specifically, as shown in fig. 1, 3 and 4, the transmission mechanism includes a gear 5 and a ring gear 6 that mesh with each other. Each fixed cover is equipped with one gear 5 on the pivot 3 respectively, three gear 5 is with same gear ring 6 meshes, gear ring 6 encircles all gear 5. The gear ring 6 is externally provided with a sleeve assembly with adjustable holding inner diameter, and the sleeve assembly holds the gear ring 6. The gear 5 and the gear ring 6 are both located between the base plate 1 and the eccentric clamping block 2. The eccentric clamping block 2 is cylindrical, the rotating shaft 3 is connected with a square rod, the square rod is arranged in the eccentric clamping block 2 in a penetrating mode, and the central line of the square rod deviates from the axial lead of the cylindrical workpiece.

As shown in fig. 5, the return mechanism includes a torsion spring 4. The base plate 1 is provided with a mounting hole on the surface facing the gear 5, the mounting hole is internally provided with the torsion spring 4, the torsion spring 4 is sleeved on the rotating shaft 3, and two ends of the torsion spring 4 are respectively abutted against the inner wall of the mounting hole and the gear 5. The utility model provides a fixed form does, and the one side just to the mounting hole is provided with the hangers on the gear 5, and in the hangers was worn to establish by the one end of torsional spring 4, the other end supported and leaned on the mounting hole inner wall.

As shown in fig. 6, the sleeve assembly comprises an inner cylinder 7 and an outer cylinder 8 which are nested with each other. One end of the inner cylinder 7 is in contact with the base plate 1, and a slider hole 71 is radially inserted through the end. At least two sliding block holes 71 are formed, all the sliding block holes 71 are distributed annularly, and each sliding block hole 71 is internally provided with a holding sliding block 9.

To facilitate clamping, the end of the inner barrel 7 is prevented from interfering with workpiece clamping. The slider hole 71 penetrates out of the end of the inner cylinder 7. The holding slide block 9 holds the gear ring 6 after extending out of the end part of the inner cylinder 7. And an avoiding step is arranged on the inner side surface of one end of the holding slide block 9 extending out of the inner cylinder 7, corresponding to the base plate 1 and the gear ring 6.

In order to prevent the holding slide block 9 from falling out of the end part of the inner cylinder 7. The inner wall of the slider hole 71 is provided with an inward-extending retaining projection 72, and the retaining projection 72 is arranged along the sliding direction of the clasping slider 9. The shape of the holding slide block 9 is matched with that of the slide block hole 71, and the holding slide block 9 is provided with an anti-falling groove corresponding to the anti-falling lug 72.

The inner side surfaces of all the holding sliders 9 abut against the outer wall of the gear ring 6 to hold the same. Positioning groove 91 has been seted up to the medial surface of holding

slider

9, 6 outer wall integrated into one piece of ring gear have location sand grip 61, location sand grip 61 with positioning groove 91 one-to-one. Therefore, the holding slide block 9 and the gear ring 6 are held tightly to prevent slipping.

As shown in fig. 4, the outer side surface of the clasping slider 9 corresponding to the outer cylinder 8 is a tapered wedge surface 92, and the tapered wedge surface 92 is in tapered wedge fit with the inner wall of the outer cylinder 8. The outer cylinder 8 is in threaded fit with the inner cylinder 7. Knurling is processed on the outer wall of the outer barrel 8, and adjustment is facilitated. Through rotating the adjusting outer cylinder 8, the position of the holding slide block 9 on the radial direction of the inner cylinder 7 can be changed, so that the inner diameter of a holding area surrounded by all the holding slide blocks 9 is changed, and the replacement of an internal clamping component, a gear ring and the like can be allowed. Aiming at the cylindrical workpieces to be clamped with different sizes, clamping components with different sizes are processed in advance, and the requirements for field use can be met by using the same sleeve component.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims

1. The utility model provides a quick clamping device suitable for cylinder work piece which characterized in that: the clamping device comprises a substrate (1), wherein three eccentric clamping blocks (2) are arranged on the substrate (1), the three eccentric clamping blocks (2) are respectively connected with a rotating shaft (3), the rotating shafts (3) are rotatably inserted on the substrate (1), and the rotating shafts (3) are arranged in parallel and distributed in a triangular shape, so that a clamping area is defined by the three eccentric clamping blocks (2);

sleeve assemblies are arranged outside the three rotating shafts (3), transmission mechanisms are arranged between the sleeve assemblies and the three rotating shafts (3), and the sleeve assemblies act on the rotating shafts (3) through the transmission mechanisms to drive the three eccentric clamping blocks (2) to synchronously rotate in the same direction;

and a reset mechanism is respectively arranged between each rotating shaft (3) and the substrate (1).

2. Quick clamping device for cylindrical workpieces according to claim 1, characterised in that: the transmission mechanism comprises a gear (5) and a gear ring (6) which are meshed with each other;

each rotating shaft (3) is fixedly sleeved with one gear (5), the three gears (5) are meshed with the same gear ring (6), and the gear ring (6) surrounds all the gears (5);

the gear ring (6) is externally provided with a sleeve assembly with adjustable holding inner diameter, and the sleeve assembly holds the gear ring (6).

3. Quick clamping device for cylindrical workpieces according to claim 2, characterized in that: the reset mechanism comprises a torsion spring (4), the torsion spring (4) is sleeved on the rotating shaft (3), and two end parts of the torsion spring (4) are respectively fixed on the base plate (1) and the gear (5).

4. Quick clamping device for cylindrical workpieces according to claim 3, characterized in that: the gear (5) and the gear ring (6) are both positioned between the base plate (1) and the eccentric clamping block (2);

the base plate (1) is provided with a mounting hole on the surface facing the gear (5), the torsion spring (4) is arranged in the mounting hole, and two ends of the torsion spring (4) are respectively abutted against the inner wall of the mounting hole and the gear (5).

5. Quick clamping device for cylindrical workpieces according to claim 2, characterized in that: the sleeve component comprises an inner cylinder (7) and an outer cylinder (8) which are nested with each other, at least two sliding block holes (71) penetrate through the inner cylinder (7) in the radial direction, all the sliding block holes (71) are distributed annularly, and a holding sliding block (9) is arranged in each sliding block hole (71);

the inner side surfaces of all the holding sliding blocks (9) abut against the outer wall of the gear ring (6) to hold the gear ring, and the outer side surfaces of the holding sliding blocks (9) are matched with the inner wall wedge of the outer cylinder (8);

the outer cylinder (8) is in threaded fit with the inner cylinder (7).

6. Quick clamping device for cylindrical workpieces according to claim 5, characterized in that: positioning groove (91) have been seted up to the medial surface of holding slider (9), ring gear (6) outer wall integrated into one piece has location sand grip (61), location sand grip (61) with positioning groove (91) one-to-one.

7. Quick clamping device for cylindrical workpieces according to claim 5, characterized in that: one end of the inner cylinder (7) is attached to the base plate (1), the sliding block hole (71) penetrates through the end part, the sliding block hole (71) penetrates out of the end part of the inner cylinder (7), and an anti-falling lug (72) which extends inwards is arranged on the inner wall of the sliding block hole (71);

the shape of the holding slide block (9) is matched with that of the slide block hole (71), and the holding slide block (9) extends out of the end part of the inner cylinder (7) and holds the gear ring (6);

and the inner side surface of one end of the clasping slide block (9) extending out of the inner cylinder (7) corresponds to the base plate (1) and the gear ring (6) and is provided with an avoiding step.