Asymmetric duplex V-shaped slot clamping jaw mechanism

Abstract

This utility model discloses an asymmetric dual-station V-groove gripper mechanism, comprising two gripper blocks arranged centrally symmetrically; a wedge block located between the two gripper blocks; and an output rod of a linear drive cylinder movably assembled with the gripper blocks via the wedge block. The wedge block utilizes the force generated by its inclined surface to ensure that the movement direction of the gripper blocks is perpendicular to the movement direction of the output rod. Each gripper block has a V-groove, with a first acute angle and a second acute angle formed on both sides of the V-groove. The protruding length of the first acute angle is shorter than that of the second acute angle. The inner wall of the V-groove has a first inner wall surface and a second inner wall surface. The first inner wall surface is concave relative to the second inner wall surface, and a transition ridge is formed at the junction of the first and second inner wall surfaces. The first inner wall surface is adjacent to the bottom of the V-groove, and the second inner wall surface is adjacent to the opening of the V-groove. This utility model facilitates a defined line contact with the workpiece during clamping and also avoids misalignment of the gripper blocks.

Description

Technical Field

[0001] This utility model relates to the field of clamping fixtures, specifically to an asymmetric dual-station V-groove gripper mechanism. Background Technology

[0002] In the field of automated machining and assembly, fixtures are crucial for workpiece positioning and clamping. Currently, most widely used gripper designs employ a dual-gripper, actively driven configuration, where a cylinder drives a pair of grippers to move closer together or further apart. Objectively speaking, this type of gripper meets the needs of most situations. However, in some special cases, while still satisfying clamping requirements, engineers are seeking more accurate gripper solutions with more detailed functionalities. Utility Model Content

[0003] The problem to be solved by this utility model is to provide an asymmetric dual-station V-groove gripper mechanism.

[0004] To solve the above problems, this utility model provides an asymmetric dual-station V-groove gripper mechanism. To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problems is as follows: An asymmetric dual-station V-groove gripper mechanism includes: gripper blocks, two gripper blocks arranged centrally symmetrically; a wedge block located between the two gripper blocks; and a linear drive cylinder, the output rod of which is movably assembled with the gripper blocks via the wedge block. The wedge block utilizes the component force generated by its inclined surface to make the movement direction of the gripper blocks perpendicular to the movement direction of the output rod. The gripper blocks have V-grooves, the V-grooves of the two gripper blocks opening towards each other and facing away from each other. The gripper blocks form a first acute angle and a second acute angle on both sides of the V-groove, the protruding length of the first acute angle being shorter than the protruding length of the second acute angle. The inner wall of the V-groove has a first inner wall surface and a second inner wall surface, the first inner wall surface being concave relative to the second inner wall surface, and a transition ridge line forming at the junction of the first and second inner wall surfaces. The first inner wall surface is adjacent to the bottom of the V-groove, and the second inner wall surface is adjacent to the opening of the V-groove.

[0005] As a further improvement of this utility model, the surface roughness of the first inner wall surface is greater than that of the second inner wall surface.

[0006] As a further improvement of this utility model, the wedge block has T-shaped blocks extending obliquely on both sides, and the gripper block and the T-shaped blocks are movably assembled through the T-shaped groove.

[0007] As a further improvement of this utility model, the T-shaped blocks on both sides of the wedge block are arranged in a mirror symmetrical manner, and the included angle between the extension directions of the T-shaped blocks on both sides of the wedge block is in the range of 35° to 45°.

[0008] As a further improvement of this utility model, a transition block is provided between the wedge block and the gripper block, and the T-shaped groove is recessed into the surface of the transition block.

[0009] As a further improvement of this utility model, a base plate is provided between the transition block and the gripper block. The base plate includes an integral flat plate and a convex rail. The gripper block has a recessed rail. The convex rail and the recessed rail are movably assembled with each other. The cross-sectional profiles of the convex rail and the recessed rail are both arc-shaped. The length extension direction of the convex rail is parallel to the movement direction of the output rod of the linear drive cylinder.

[0010] As a further improvement of this utility model, the flat plate has a countersunk hole, through which fasteners pass and fix the base plate and the transition block to each other.

[0011] As a further improvement of this utility model, the wedge block has a stepped hole in the middle, and one end of the output rod of the linear drive cylinder is coaxially fixed with a bolt, which passes through the stepped hole and is fixed.

[0012] As a further improvement of this utility model, the closer the wedge block is to the linear drive cylinder, the more the gripper blocks that are movably assembled on both sides of the wedge block move to the sides.

[0013] As a further improvement of this utility model, the linear drive cylinder is a linear pneumatic cylinder. The side wall of the cylinder body of the linear drive cylinder has two pneumatic ports, which respectively control the extension and retraction of the output rod of the linear drive cylinder.

[0014] The advantages of using the asymmetric dual-station V-groove gripper mechanism of this application are: First, the axial motion of the linear drive cylinder is converted into the vertical opening and closing motion of the gripper block by a wedge block, achieving a compact power transmission structure. Simultaneously, the asymmetrical V-groove design with back-to-back arrangement enables the gripper to have dual-station synchronous clamping capability.

[0015] Secondly, the inner wall of the V-groove adopts a structure in which the concave first inner wall surface and the convex second inner wall surface are combined with a transition ridge. This facilitates the formation of a defined line contact with the workpiece during clamping, which reduces the surface accuracy requirements of the workpiece and improves the repeatability of positioning.

[0016] Finally, the length difference between the first and second acute angles allows for adaptation to asymmetrical workpiece contours, while the relatively longer acute angles also serve as guides for entry into the slot, improving clamping compatibility and positioning accuracy. Furthermore, breaking the symmetry of the gripper blocks prevents mis-installation. Overall, it is a gripper mechanism with more refined technical details. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded view of one embodiment of the present invention; Figure 2 This is a perspective view of one embodiment of the present utility model; Figure 3 This is a top view of one embodiment of the present invention; Figure 4 This is a cross-sectional view (AA) of one embodiment of this utility model.

[0019] 1-Linear drive cylinder; 2-Bolt; 3-Wedge block; 301-Stepped hole; 302-T-block; 4-Transition block; 401-Straight surface; 402-T-groove; 5-Base plate; 501-Flat plate; 502-Protruding rail; 6-Claw block; 601-V-groove; 602-Concave rail; 603-First inner wall surface; 604-Second inner wall surface; 605-Transition ridge; 606-First acute angle; 607-Second acute angle; 7-Hex socket head cap screw. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments: To achieve the purpose of this utility model, an asymmetric dual-station V-groove gripper mechanism includes: gripper blocks 6, with two gripper blocks 6 arranged centrally symmetrically; a wedge block 3 located between the two gripper blocks 6; and a linear drive cylinder 1, the output rod of which is movably assembled with the gripper blocks 6 via the wedge block 3. The wedge block 3 utilizes the component force generated by its inclined surface to make the movement direction of the gripper blocks 6 perpendicular to the movement direction of the output rod. The gripper blocks 6 have V-grooves 601, with the V-grooves 601 of the two gripper blocks 6 opening towards each other. A first acute angle portion 606 and a second acute angle portion 607 are formed on both sides of the V-groove 601, with the protruding length of the first acute angle portion 606 shorter than the protruding length of the second acute angle portion 607. The inner wall of the V-groove 601 has a first inner wall surface 603 and a second inner wall surface 604. The first inner wall surface 603 is concave relative to the second inner wall surface 604. A transition ridge 605 is formed at the junction of the first inner wall surface 603 and the second inner wall surface 604. The first inner wall surface 603 is adjacent to the bottom of the V-groove 601, and the second inner wall surface 604 is adjacent to the opening of the V-groove 601.

[0021] In some other embodiments of this utility model, the surface roughness of the first inner wall surface 603 is greater than the surface roughness of the second inner wall surface 604.

[0022] The beneficial effects of adopting the above technical solution are: the higher surface roughness of the first inner wall surface 603 increases the anti-slip friction with the workpiece, and the lower surface roughness of the second inner wall surface 604 facilitates the workpiece to slide into the positioning, thus jointly improving the clamping reliability.

[0023] In some other embodiments of this utility model, the wedge block 3 has T-shaped blocks 302 extending obliquely on both sides, and the gripper block 6 and the T-shaped blocks 302 are movably assembled through the T-shaped groove 402.

[0024] The beneficial effects of adopting the above technical solution are: the inclined T-shaped block 302 of the wedge block 3 cooperates with the T-shaped groove 402 of the gripper block 6 to constrain the motion trajectory while bearing lateral force and preventing the mechanism from dislodging.

[0025] like Figure 4 As shown, in some other embodiments of this utility model, the T-shaped blocks 302 on both sides of the wedge block 3 are arranged in a mirror-symmetric manner, and the included angle between the extending directions of the T-shaped blocks 302 on both sides of the wedge block 3 is in the range of 35° to 45°. Preferably, it is 40°.

[0026] In addition, the cross-sectional profiles of T-block 302 and T-groove 402 are both T-shaped.

[0027] The beneficial effects of adopting the above technical solution are: the T-shaped block 302 is mirror symmetrical and has an included angle of 35° to 45°, which can optimize the wedge force transmission efficiency and ensure the balance between the opening and closing stroke of the gripper block 6 and the driving force.

[0028] In some other embodiments of this utility model, a transition block 4 is provided between the wedge block 3 and the gripper block 6, and the T-shaped groove 402 is recessed in the surface of the transition block 4.

[0029] The beneficial effects of adopting the above technical solution are: the transition block 4 is designed to be separate, and its surface T-groove 402 reduces the assembly wear of the wedge block 3 and the gripper block 6, making it easier to maintain and replace.

[0030] In some other embodiments of this utility model, a base plate 5 is provided between the transition block 4 and the gripper block 6. The base plate 5 includes an integral flat plate portion 501 and a convex rail portion 502. The gripper block 6 has a recessed rail portion 602 on its surface. The convex rail portion 502 and the recessed rail portion 602 are movably assembled with each other. The cross-sectional contours of the convex rail portion 502 and the recessed rail portion 602 are both arc-shaped. The length extension direction of the convex rail portion 502 is parallel to the movement direction of the output rod of the linear drive cylinder 1.

[0031] The beneficial effects of adopting the above technical solution are as follows: the superior arc-shaped convex rail portion 502 of the base plate 5 cooperates with the concave rail portion 602 of the gripper block 6 to provide low-resistance sliding guidance, and the convex rail portion 502 is parallel to the direction of movement of the output rod, ensuring the linearity of the gripper's opening and closing. In addition, the superior arc shape can also prevent the convex rail portion 502 and the concave rail portion 602 from easily becoming loose.

[0032] In some other embodiments of this utility model, the flat plate portion 501 has a countersunk hole through which a fastener passes and fixes the base plate 5 and the transition block 4 to each other.

[0033] like Figure 1 As shown, the countersunk hole is fitted with an internal hex bolt 7, which fixes the base plate 5 and the transition block 4 together.

[0034] The beneficial effects of adopting the above technical solution are: the countersunk hole of the flat plate 501, together with the fastener, realizes the base plate 5 and the transition block 4 without protrusion, thereby facilitating the full surface contact between the gripper block 6 and the base plate 5.

[0035] like Figure 4 As shown, in some other embodiments of this utility model, the wedge block 3 has a stepped hole 301 in the middle, and one end of the output rod of the linear drive cylinder 1 is coaxially fixed with a bolt 2, which passes through the stepped hole 301 and is fixed.

[0036] The beneficial effects of adopting the above technical solution are: the bolt 2 passes through the stepped hole 301 of the wedge block 3 to connect the output rod, which is equivalent to extending the output rod on the one hand, and provides axial detachable fixation on the other hand, which facilitates the replacement or maintenance of the wedge block 3.

[0037] In some other embodiments of this utility model, the closer the wedge block 3 is to the linear drive cylinder 1, the more the gripper blocks 6 that are movably assembled on both sides of the wedge block 3 move to the sides.

[0038] The beneficial effects of adopting the above technical solution are: when the wedge block 3 approaches the linear drive cylinder 1, it drives the gripper block 6 to move outward, thus clarifying the motion logic of the mechanism and ensuring the reliability of the clamping action.

[0039] like Figure 2 As shown, in some other embodiments of this utility model, the linear drive cylinder 1 is a linear pneumatic cylinder. The side wall of the cylinder body of the linear drive cylinder 1 is provided with two pneumatic ports, which respectively control the extension and retraction of the output rod of the linear drive cylinder.

[0040] The advantages of adopting the above technical solution are: linear cylinder drive combined with dual pneumatic interface control, fast response and low cost, meeting the cycle time requirements of automated production lines.

[0041] To clearly demonstrate the structure of each component. Figure 1 compared to Figures 2 to 4 , Figure 1The linear drive cylinder 1 is hidden inside.

[0042] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. An asymmetric duplex V-slot gripper mechanism, characterized in that, include: The gripper blocks are arranged symmetrically in a central configuration. A wedge-shaped block is located between two gripper blocks; A linear drive cylinder, wherein the output rod of the linear drive cylinder is movably assembled with a gripper block via a wedge block, and the wedge block utilizes the component force generated by its own inclined surface to make the movement direction of the gripper block perpendicular to the movement direction of the output rod; The gripper block has a V-shaped groove, and the V-shaped grooves of the two gripper blocks open to each other and face away from each other. The gripper block forms a first acute angle and a second acute angle on both sides of the V-shaped groove, and the protrusion length of the first acute angle is shorter than the protrusion length of the second acute angle. The inner wall of the V-shaped groove has a first inner wall surface and a second inner wall surface. The first inner wall surface is concave relative to the second inner wall surface. A transition ridge is formed at the junction of the first inner wall surface and the second inner wall surface. The first inner wall surface is adjacent to the bottom of the V-shaped groove, and the second inner wall surface is adjacent to the opening of the V-shaped groove.

2. The asymmetric dual-station V-groove gripper mechanism according to claim 1, characterized in that: The surface roughness of the first inner wall surface is greater than that of the second inner wall surface.

3. The asymmetric dual-station V-groove gripper mechanism according to claim 1, characterized in that: The wedge-shaped block has T-shaped blocks extending obliquely on both sides, and the gripper block and the T-shaped blocks are movably assembled through the T-shaped groove.

4. The asymmetric dual-station V-groove gripper mechanism according to claim 1, characterized in that: The T-shaped blocks on both sides of the wedge are arranged in a mirror-symmetric manner, and the included angle between the extension directions of the T-shaped blocks on both sides of the wedge ranges from 35° to 45°.

5. The asymmetric dual-station V-groove gripper mechanism according to claim 3, characterized in that: A transition block is provided between the wedge block and the gripper block, and the T-shaped groove is recessed into the surface of the transition block.

6. The asymmetric dual-station V-groove gripper mechanism according to claim 5, characterized in that: A base plate is provided between the transition block and the gripper block. The base plate includes an integral flat plate and a convex rail. The surface of the gripper block is recessed with a concave rail. The convex rail and the concave rail are movably assembled with each other. The cross-sectional profiles of the convex rail and the concave rail are both arc-shaped. The length extension direction of the convex rail is parallel to the movement direction of the output rod of the linear drive cylinder.

7. The asymmetric dual-station V-groove gripper mechanism according to claim 6, characterized in that: The flat plate has a countersunk hole through which a fastener passes and fixes the base plate and the transition block together.

8. The asymmetric dual-station V-groove gripper mechanism according to claim 1, characterized in that: The wedge-shaped block has a stepped hole in the middle, and one end of the output rod of the linear drive cylinder is coaxially fixed with a bolt, which passes through the stepped hole and is fixed.

9. The asymmetric dual-station V-groove gripper mechanism according to claim 1, characterized in that: The closer the wedge block is to the linear drive cylinder, the more the gripper blocks that are movably assembled on both sides of the wedge block move to the sides.

10. The asymmetric dual-station V-groove gripper mechanism according to claim 1, characterized in that: The linear drive cylinder is a linear pneumatic cylinder. The side wall of the cylinder body of the linear drive cylinder has two pneumatic ports, which respectively control the extension and retraction of the output rod of the linear drive cylinder.

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