CN217552431U

CN217552431U - Inclined expansion type clamping mechanism and tool gripper

Info

Publication number: CN217552431U
Application number: CN202123161901.3U
Authority: CN
Inventors: 刘仁杰
Original assignee: Shanghai Daomi Technology Co ltd
Current assignee: Shanghai Daomi Technology Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-10-11
Anticipated expiration: 2031-12-16

Abstract

The inclined expansion type clamping mechanism and the tool gripper are characterized in that slopes are respectively arranged on the mutually contacted end faces of a rod sleeve and a stressed pressing sleeve of the positioning shaft rod; when the pull rod drives the stressed pressure sleeve and the rod sleeve to do axial relative motion, the stressed pressure sleeve expands outwards along the slope in the radial direction and further compresses the inner wall of the hole, and clamping of the workpiece is completed. The utility model discloses a radially outwards remove along the atress pressure cover that the inclined plane expands outward, enlarge the diameter, and then compress tightly and produce frictional force with the inner wall in the hole of work piece to accomplish the centre gripping of work piece, the centre gripping effect is good, the security performance is good, and the commonality is stronger.

Description

Oblique expanding type clamping mechanism and tool gripper

Technical Field

The utility model belongs to the technical field of the industry anchor clamps tongs and specifically relates to an oblique bloated formula fixture and instrument tongs.

Background

Industrial clamp grippers are widely used in the production lines of the mechanical industry, and are generally used for gripping, handling workpieces or operating tools according to a fixed procedure. The shape, the size inequality of different work pieces, if during snatching with article area of contact not enough, perhaps the condition that the unable centre gripping of work piece, and then break away from can appear if hang the position of getting, the shape of reserving, can influence the production progress. In addition, the structure of the existing industrial clamp gripper is complex, and the manufacturing cost is high; and the universality is not high, and the use is more complicated.

Disclosure of Invention

The utility model discloses a solve current problem, aim at providing an oblique bloated formula fixture and instrument tongs.

In order to achieve the purpose, the technical scheme adopted by the utility model is used for grabbing the workpiece, and comprises a positioning shaft lever, a stress pressing sleeve and a hole arranged on the workpiece; wherein, the rod sleeve of the positioning shaft lever and the end surface contacted with the stress pressing sleeve are respectively provided with a slope; when the pull rod drives the stressed pressure sleeve and the rod sleeve to do axial relative motion, the stressed pressure sleeve expands outwards along the slope in the radial direction and further compresses the inner wall of the hole, and clamping of the workpiece is completed.

In some embodiments, the rod sleeve of the positioning shaft is provided with a central hole for the rod body of the pull rod to pass through, and the upper end of the pull rod is driven by the driving unit to move axially along the rod sleeve.

In some embodiments, the driving unit is fixed on the upper end face of the positioning shaft rod, and the output end of the driving unit drives the pull rod to move linearly.

In some embodiments, the force-bearing pressing sleeve is also provided with a through inner hole, the rod body of the pull rod penetrates through the through inner hole, and the lower end of the pull rod is fixedly connected with the force-bearing pressing sleeve.

In some embodiments, the lower end of the pull rod is provided with a step protruding outwards in the radial direction, and the step is connected with the lower end face of the stressed pressing sleeve.

In some embodiments, the lower end of the pull rod is provided with a taper angle to facilitate insertion into the bore.

In some embodiments, the slope includes a first slope and a second slope, which are respectively formed by parallel beveling at the same angle on the mutually contacted end surfaces of the rod sleeve and the stressed pressing sleeve.

In some embodiments, the outer wall of the positioning shaft body and the outer wall of the stressed pressing sleeve have the same diameter.

The utility model also provides a tool gripper, which comprises the inclined expansion type clamping mechanism; at least one hole is arranged on the workpiece to be grabbed.

Compared with the prior art, the utility model has the advantages that the stressed pressing sleeve expanding outwards along the inclined plane moves outwards in the radial direction, the diameter is enlarged, and the stressed pressing sleeve is further pressed against the inner wall of the hole of the workpiece to generate friction force, so as to clamp the workpiece; the clamping and releasing operation can be carried out through corresponding structures only by arranging holes for fixing shapes on different workpieces, and the clamping effect is good, the safety performance is good, and the universality is strong.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the present invention;

fig. 3 is an explanatory view (release state) of the embodiment of the present invention;

fig. 4 is an explanatory view (expansion state) of the embodiment of the present invention;

referring to the attached drawings, the positioning shaft lever 1, a lever sleeve 1A, a first slope 1B, a middle hole 1C, a stress pressing sleeve 2, a through inner hole 2A, a second slope 2B, a pull rod 3, a pull rod outer wall 3A, a taper angle 3B, a step 3C, a driving unit 4, a fixing hole 4A, a workpiece 5 and a hole 5A are arranged in the positioning shaft lever.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings.

Referring to fig. 1 and 2, fig. 1 and 2 show an embodiment of the present invention, which mainly includes a positioning shaft rod 1, a stress pressing sleeve 2, and a hole 5A formed on a workpiece 5. The rod body of the pull rod 3 penetrates through the middle hole of the rod sleeve 1A and the through inner hole of the stress pressing sleeve 2 and is connected with the lower end face of the stress pressing sleeve 2. The pull rod 3 and the stressed pressing sleeve 2 are coaxial and can move relatively along the axial direction together.

Wherein, the mutually contacted end surfaces of the rod sleeve 1A of the positioning shaft lever 1 and the stressed pressing sleeve 2 are respectively provided with a first slope 1B and a second slope 2B; the first slope 1B and the second slope 2B are formed by parallel beveling at the same angle on the corresponding end surfaces of the rod sleeve 1A and the stress pressing sleeve 2 respectively, so that the first slope 1B and the second slope 2B can be combined into a straight rod or can relatively slide along the slope surface. The rod sleeve 1A of the positioning shaft lever 1 is provided with a middle hole 1C for the rod body of the pull rod 3 to pass through, the upper end of the pull rod 3 is preferably driven by a driving unit 4, the driving unit 4 (an air cylinder or a servo motor) is fixed on the upper end surface of the positioning shaft lever 1, and the output end of the driving unit 4 drives the pull rod 3 to do axial linear motion along the rod sleeve.

Referring to fig. 2, the stress pressing sleeve 2 is provided with a through inner hole 2A, the rod body of the pull rod 3 penetrates through the through inner hole 2A, and the lower end of the pull rod 3 is fixedly connected with the stress pressing sleeve 2. Furthermore, the lower end of the outer wall 3A of the pull rod is provided with a step 3C which protrudes outwards in the radial direction, the step 3C is connected with the lower end face of the stress pressing sleeve 2, and the stress pressing sleeve 2 can be driven to move along with the pull rod 3 when the pull rod moves.

Referring to fig. 4, in the present embodiment, the hole 5A is first inserted, and then the driving unit 4 drives the pull rod 3 to move upward, so that the forced pressing sleeve 2 moves upward under the action of the pull rod 3. Because the rod sleeve 1A of the positioning shaft rod 1 is a fixed part, the positioning shaft rod 1 is contacted with the stress pressing sleeve 2 through the first slope 1B and the second slope 2B, and radial force is generated through the slope surface at the moment, so that the stress pressing sleeve 2 penetrates through the inner hole 2A to move radially outwards in an inclined manner, the overall outer diameter is increased, the inner wall of the hole 5A is tightly propped, and the workpiece clamping of the unthreaded hole is realized.

Referring to fig. 3, when releasing, the driving unit 4 drives the pull rod 3 to move downwards, the stressed pressing sleeve 2 is in a free state due to the fact that the stressed pressing sleeve is not subjected to axial force, the hole 5A is not tightly supported, and releasing of the workpiece is achieved.

In addition, preferably, the lower end of the pull rod 3 is provided with a taper angle 3B, or the outer wall of the rod body of the positioning shaft lever 1 and the outer wall of the stress pressing sleeve 2 have the same diameter, so that the pull rod can be more conveniently inserted into the hole 5A of the workpiece 5.

The clamping force of the inclined strut of the hole 5A of the workpiece 5 can be multiplied by changing the inclination of the slope surface, so that the tool gripper can grip heavier workpieces without enlarging the driving unit 4, and the structure of the tool gripper can be very compact and light.

The utility model also provides a tool gripper on the mechanical arm, which comprises the in-hole expansion type clamping mechanism; and a hole 5A is provided on the workpiece 5 to be grasped. The operation and effect are the same as those of the above embodiments, and therefore are not described in detail.

The embodiments of the present invention have been described in conjunction with the accompanying drawings and examples, the structures of which are not intended to limit the present invention, and those skilled in the art can make modifications as required, and all changes and modifications within the scope of the appended claims are within the scope of protection.

Claims

1. The utility model provides an oblique expanding fixture for snatch the work piece, its characterized in that: comprises a positioning shaft lever, a stressed pressing sleeve and a hole arranged on a workpiece; wherein, the rod sleeve of the positioning shaft lever and the end surface of the stressed pressing sleeve which are contacted with each other are respectively provided with a slope;

the rod sleeve of the positioning shaft rod is provided with a middle hole for the rod body of the pull rod to pass through; the stress pressing sleeve is also provided with a through inner hole, the rod body of the pull rod penetrates through the middle hole of the rod sleeve and the through inner hole, and the lower end of the pull rod is fixedly connected with the stress pressing sleeve;

when the pull rod drives the stressed pressure sleeve and the rod sleeve to do axial relative motion, the stressed pressure sleeve expands outwards along the slope in the radial direction and further compresses the inner wall of the hole, and clamping of the workpiece is completed.

2. The oblique expansion gripper mechanism of claim 1, wherein: the upper end of the pull rod is driven by the driving unit to move axially along the rod sleeve.

3. The oblique expansion clamping mechanism of claim 2, wherein: the drive unit is fixed on the upper end face of the positioning shaft rod, and the output end of the drive unit drives the pull rod to do linear motion.

4. The oblique expansion clamping mechanism of claim 1, wherein: the lower end of the pull rod is provided with a step which protrudes outwards in the radial direction, and the step is connected with the lower end face of the stress pressing sleeve.

5. The oblique expansion clamping mechanism of claim 2, wherein: the lower end of the pull rod is provided with a taper angle which is convenient to insert into the hole.

6. The oblique expansion clamping mechanism of claim 1, wherein: the slope comprises a first slope and a second slope which are formed by parallel beveling at the same angle on the mutually contacted end surfaces of the rod sleeve and the stress pressing sleeve respectively.

7. The oblique expansion clamping mechanism of claim 6, wherein: the diameters of the outer wall of the rod body of the positioning shaft lever and the outer wall of the stress pressing sleeve are the same.

8. Instrument tongs, its characterized in that: comprising the tilt-expansion clamp mechanism of any one of claims 1-7; at least one hole is arranged on the workpiece to be grabbed.