Positioning device

Abstract

This invention relates to a positioning device, comprising: a base including a plurality of positioning holes, a first receiving groove, a second receiving groove, and a first flow channel, the first flow channel communicating with the second receiving groove; a clamping assembly disposed in the first receiving groove, including a plurality of clamping blocks, a push block, and at least one reset assembly, the push block being laterally able to push against the plurality of clamping blocks to engage with the plurality of positioning holes, each clamping block having a sliding inclined surface, the push block having a plurality of pushing inclined surfaces around its periphery, each pushing inclined surface slidably abutting against a sliding inclined surface, each reset assembly including a connecting member and at least one elastic unit, the connecting member passing through the plurality of clamping blocks, the at least one elastic unit springing against one of the clamping blocks and the connecting member; and a piston, capable of driving the push block to move relative to the plurality of clamping blocks.

Description

Technical Field

[0001] This invention relates to positioning devices, and in particular to a technical improvement of a positioning device for positioning a component to be positioned. Prior Technology

[0002] Positioning devices can be used in precision machining, CNC machining, mold making, five-axis machining and other fields. They can position objects (such as positioning fixtures, vises, jigs, workpieces, cutting tools, molds, etc.) on them, and allow objects to be transferred between different positioning devices or repeatedly installed in the same positioning device while maintaining accurate positioning.

[0003] The conventional positioning device uses a screw to connect first and second locking components. By rotating the screw, the first and second locking components can be adjusted to lock the first and second posts of an object. By rotating the screw in the opposite direction, the first and second locking components can be released from locking the first and second posts of the object.

[0004] However, the conventional technique of using a screw to adjust the first and second locking components to lock and release the first and second inserts results in a slow adjustment speed. Frequent replacement of components leads to wasted time and reduced work efficiency. Furthermore, thread wear affects locking accuracy, and long-term use may cause thread loosening, resulting in unstable clamping force.

[0005] Therefore, it is necessary to provide a novel and progressive positioning device to solve the above-mentioned problems. Summary of the Invention

[0006] The main objective of this invention is to provide a positioning device that can stably and quickly position and detach from the part to be positioned.

[0007] To achieve the above objectives, the present invention provides a positioning device comprising: a base including a plurality of positioning holes, a first receiving groove, a second receiving groove, and a first flow channel, the first flow channel communicating with the second receiving groove; a clamping assembly disposed in the first receiving groove, the clamping assembly including a plurality of clamping blocks, a push block, and at least one reset assembly, the push block being laterally pushed against the plurality of clamping blocks to engage with the plurality of positioning holes, each clamping block having a sliding inclined surface, the push block having a plurality of pushing inclined surfaces around its periphery, each pushing inclined surface and a sliding inclined surface being slidably abutting against each other, each reset assembly including a connector and at least one elastic unit, the connector passing through the plurality of clamping blocks, the at least one elastic unit springing against one of the clamping blocks and the connector; and a piston movably disposed in the second receiving groove, the piston abutting against the inner annular wall of the second receiving groove, the piston being able to drive the push block to move relative to the plurality of clamping blocks. Simple Explanation of the Diagram

[0008] Figure 1 is a perspective view of an embodiment of the present invention. Figure 2 is an exploded view of an embodiment of the present invention. Figure 3 is a partial enlarged view of an embodiment of the present invention. Figure 4 is an exploded view of a clamping component according to an embodiment of the present invention. Figure 5 is another exploded view of an embodiment of the present invention. Figure 6 is an exploded view of an embodiment of the present invention and one of the components to be positioned. Figures 7, 9, and 11 are schematic diagrams of a piston being pressed down according to an embodiment of the present invention. Figures 8 and 10 are schematic diagrams of the piston being pushed upwards according to an embodiment of the present invention. Figure 12 shows the grooves in which the multiple clamping blocks disengage from the multiple positioning structure according to an embodiment of the present invention. Figure 13 shows the grooves in the multiple positioning structure of the multiple clamping blocks according to an embodiment of the present invention. Figure 14 shows the pusher in the first position according to an embodiment of the present invention. Figure 15 shows the pusher in the second position according to an embodiment of the present invention. Implementation

[0009] The following examples illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention. The use of "a" or "at least one" before the terms mentioned herein is not a limitation on the quantity, and may also be "multiple" depending on the requirements. Such variations in quantity are also within the scope of protection, and are therefore stated in advance.

[0010] Please refer to Figures 1 to 15, which show one embodiment of the present invention. The positioning device 1 of the present invention includes: a base 10, a clamping assembly 20 and a piston 40.

[0011] The base 10 includes a plurality of positioning holes 11, a first receiving groove 12, a second receiving groove 13, and a first flow channel 14, the first flow channel 14 communicating with the second receiving groove 13. The clamping assembly 20 is disposed in the first receiving groove 12. The clamping assembly 20 includes a plurality of clamping blocks 21, a push block 22, and at least one reset assembly 30. The push block 22 can laterally push against the plurality of clamping blocks 21 to engage with the plurality of positioning holes 11. Each clamping block 21 is provided with a sliding inclined surface 211. The push block 22 is provided with a plurality of pushing inclined surfaces 221 on its periphery. Each pushing inclined surface 221 and a sliding inclined surface 211 can slide relative to each other.

[0012] Each reset assembly 30 includes a connector 31 and at least one elastic unit 32. The connector 31 passes through the plurality of clamping blocks 21, and the elastic unit 32 springs against one of the clamping blocks 21 and the connector 31. In this embodiment, it springs against the expanded diameter section of the connector 31. The piston 40 is movably disposed in the second receiving groove 13. The piston 40 abuts against the inner annular wall of the second receiving groove 13, and the piston 40 can drive the push block 22 to move relative to the plurality of clamping blocks 21.

[0013] To further explain, each of the positioning holes 11 extends along an axial direction L1, which is transverse to one of the sliding directions S of each of the clamping blocks 21. The plurality of positioning holes 11 are provided with a plurality of positioning structures 3 (such as inserts) for a part to be positioned 2 (such as a positioning fixture, vise, clamp, workpiece to be processed, cutting tool, mold, etc.) that can be detachably accommodated therein. The plurality of clamping blocks 21 can be selectively engaged or disengaged from one of the grooves 4 of each of the positioning structures 3. The axial direction L1 is perpendicular to the sliding direction S, so as to quickly position and release the part to be positioned 2.

[0014] In use, fluid (e.g., gas or liquid) can be selectively introduced into the first flow channel 14, and the piston 40 is pushed up to drive the push block 22 to move upward along the axial direction L1 (as shown in Figure 8). This causes the push block 22 to laterally push against the plurality of clamping blocks 21, moving away from each other along the extension direction of the connector 31, and engaging with the plurality of positioning holes 11 and the grooves 4 of each positioning structure 3 (as shown in Figure 13), and elastically compressing each elastic unit 32 to achieve a positioning effect. Conversely, when the piston 40 and the push block 22 move downward to reset (as shown in Figure 7), each elastic unit 32 pushes the plurality of clamping blocks 21 closer to each other along the extension direction of the connector 31 to reset (as shown in Figure 9), thereby disengaging from the plurality of positioning holes 11 and the grooves 4 of each positioning structure 3 and releasing the positioning.

[0015] In this way, with a simple structure, the plurality of clamping blocks 21 can be moved away from and closer to each other stably and smoothly, without being prone to swaying, so as to quickly position and detach from the positioning member 2.

[0016] Specifically, each connector 31 includes two screws 311 (which may be bolts or headed screws) and a nut 312. Each screw 311 is fitted with a clamping block 21. The nut 312 screws the threaded sections of the two screws 311. Each clamping block 21 can move relative to one of the screws 311. Preferably, each reset assembly 30 includes a plurality of elastic units 32. Each elastic unit 32 springs against one of the screws 311 and one of the clamping blocks 21, so that each screw 311 guides the clamping blocks 21 to move stably relative to each other.

[0017] To further explain, the nut 312 has a first internal thread section and a second internal thread section with opposite helical directions. One of the screw parts 311 is screwed into the first internal thread section, and the other screw part 311 is screwed into the second internal thread section. When the nut 312 is adjusted in either the forward or reverse direction, the two screw parts 311 can be brought closer or further apart, thereby adjusting the relative position between the plurality of clamping blocks 21 and improving the positioning accuracy.

[0018] Preferably, the push block 22 is provided with at least one slot 222, and the nut 312 is engaged in the at least one slot 222. The nut 312 can abut against the opposite two side walls of the slot 222 in one of the sliding directions S of each of the clamping blocks 21. In this embodiment, the clamping assembly 20 includes two reset assemblies 30. The push block 22 is provided with two slots 222 on opposite sides, and each clamping block 21 is disposed in one of the slots 222. Each screw 311 can pass through the clamping block 21 in the sliding direction S of each clamping block 21. In this way, each clamping block 21 can be confined in the slot 222 and will not move relative to the push block 22 in the sliding direction S, so as to fix the relative position of the two screws 311.

[0019] Preferably, the clamping assembly 20 further includes a plurality of spring-pushing members 23, which spring against the plurality of clamping blocks 21 and the base 10 and are parallel to each of the elastic units 32, so as to increase the spring-pushing force for resetting each clamping block 21 (as shown in Figures 12 and 13).

[0020] Each clamping block 21 has at least one (or a plurality of) balls 24 on one end face. The at least one (or a plurality of) balls 24 are in contact with the inner wall of the base 10, so that each clamping block 21 can slide stably and smoothly relative to the base 10 without easily wobbling.

[0021] The positioning device 1 further includes a plurality of pushing mechanisms 50. Each positioning hole 11 defines a central axis A, which extends along the axial direction L1. Each positioning hole 11 is open along the axial direction L1. The base 10 further includes a second flow channel 15 and a plurality of receiving holes 16. The second flow channel 15 connects the plurality of receiving holes 16 and the second receiving groove 13. The plurality of pushing mechanisms 50 are disposed within the plurality of receiving holes 16. Each pushing mechanism 50 can move relative to a receiving hole 16 along the axial direction L1 to protrude from one of the outer end faces of the base 10. Specifically, fluid can be selectively introduced into the first flow channel 14 and the second flow channel 15 by a drive unit such as a pneumatic cylinder.

[0022] Specifically, each of the pushing mechanisms 50 includes a pushing member 51, a spring abutment 52, and a sealing ring 53. The pushing member 51 can move relative to the receiving hole 16 between a first position and a second position. When the pushing member 51 is in the first position (as shown in Figure 14), the pushing member 51 is located inside the receiving hole 16. When the pushing member 51 is in the second position (as shown in Figure 15), the pushing member 51 protrudes from the outer end face of the base 10. The spring-loaded abutment 52 abuts against the inner wall of the pusher 51 and the receiving hole 16. The sealing ring 53 is disposed on the pusher 51 and abuts against the inner wall of the receiving hole 16. Each receiving hole 16 is further provided with a limiting ring 54. The limiting ring 54 can abut against the pusher 51 and move towards the second receiving groove 13. The limiting ring 54 is provided with a through hole 541, which connects the second receiving groove 13 and the receiving hole 16. In this embodiment, the limiting ring 54 is screwed into one of the receiving holes 16 so as to facilitate disassembly, assembly and replacement.

[0023] The piston 40 blocks the first flow channel 14 and the second flow channel 15 on opposite sides; each of the receiving holes 16 and each of the positioning holes 11 are also open along the axial direction L1. Thus, when fluid (gas or liquid) is introduced into the second flow channel 15, each of the pushers 51 can be pushed up (moving from the first position to the second position) and the piston 40 can be pressed down at the same time, that is, the clamps 21 can be released from limiting the plurality of positioning structures 3 (operation as shown in Figures 13 to 12) and the plurality of positioning structures 3 of the object to be positioned 2 can be pushed away from each of the positioning holes 11, so that each of the positioning structures 3 can be quickly and smoothly disengaged; in addition, when the fluid pushes each of the pushers 51, the spring abutment 52 can be used to spring each of the pushers 51 back to the first position.

[0024] 1: Positioning device 2: Component to be positioned 3: Positioning Structure 4: Groove 10: Base 11: Positioning hole 12: First receiving slot 13: Second receiving slot 14: First Stream 15: Second flow channel 16: Reception Hole 20: Clamping assembly 21: Clamp 211:Sliding on the slope 22: Push Block 221: Push against the inclined surface 222: Card Slot 23: Spring-loaded component 24: Ball bearing 30: Reset component 31: Connector 311: Screws 312: Nut 32: Elastic Unit 40: Piston 50: Top-pushing mechanism 51: Pushing component 52: Spring-loaded parts 53: Sealing ring 54: Limiting ring 541: Through hole S: Sliding direction A: Central axis L1: Axial direction

Claims

1. A positioning device, comprising: A base includes a plurality of positioning holes, a first receiving groove, a second receiving groove, and a first flow channel, the first flow channel being connected to the second receiving groove; A clamping assembly, disposed in the first receiving groove, includes a plurality of clamping blocks, a push block, and at least one reset assembly. The push block can laterally push against the plurality of clamping blocks to engage with the plurality of positioning holes. Each clamping block is provided with a sliding inclined surface. The push block is provided with a plurality of pushing inclined surfaces around its periphery. Each pushing inclined surface and a sliding inclined surface can slide relative to each other. Each reset assembly includes a connector and at least one elastic unit. The connector passes through the plurality of clamping blocks, and the at least one elastic unit springs against one of the clamping blocks and the connector. A piston is movably disposed in the second receiving groove and abuts against the inner annular wall of the second receiving groove. The piston can drive the push block to move relative to the plurality of clamping blocks. Each connector includes two screws and a nut. Each screw passes through one of the clamping blocks, and the nut screws the two screws. Each clamping block can move relative to one of the screws.

2. The positioning device as claimed in claim 1, wherein each of the reset components includes a plurality of the elastic elements, each of the elastic elements springing back between a screw and a clamping block.

3. The positioning device as claimed in claim 2, wherein the push block is provided with at least one slot, the nut is engaged in the at least one slot, and the nut can abut against the opposite two side walls of the slot in one of the sliding directions of the clamping blocks.

4. A positioning device, comprising: A base includes a plurality of positioning holes, a first receiving groove, a second receiving groove, and a first flow channel, the first flow channel being connected to the second receiving groove; A clamping assembly, disposed in the first receiving groove, includes a plurality of clamping blocks, a push block, and at least one reset assembly. The push block can laterally push against the plurality of clamping blocks to engage with the plurality of positioning holes. Each clamping block is provided with a sliding inclined surface. The push block is provided with a plurality of pushing inclined surfaces around its periphery. Each pushing inclined surface and a sliding inclined surface can slide against each other. Each reset assembly includes a connector and at least one elastic unit. The connector passes through the plurality of clamping blocks, and the at least one elastic unit springs against one of the clamping blocks and the connector. A piston is movably disposed in the second receiving groove, circumferentially abutting the inner annular wall of the second receiving groove. The piston can drive the push block to move relative to the plurality of clamping blocks. The clamping assembly further includes a plurality of spring-push members, which spring against the plurality of clamping blocks and the base and are parallel to each of the elastic units.

5. The positioning device as claimed in claim 1, wherein one end face of each of the clamping blocks is provided with at least one ball, the at least one ball contacting an inner wall of one of the bases.

6. The positioning device as claimed in claim 1, wherein each of the positioning holes extends along an axial direction transverse to one of the sliding directions of each of the clamping blocks, the plurality of positioning holes being detachably accommodated in a plurality of positioning structures of a member to be positioned, and the plurality of clamping blocks being selectively engaged with or disengaged from one of the grooves of each of the positioning structures.

7. A positioning device, comprising: A base includes a plurality of positioning holes, a first receiving groove, a second receiving groove, and a first flow channel, the first flow channel being connected to the second receiving groove; A clamping assembly, disposed in the first receiving groove, includes a plurality of clamping blocks, a push block, and at least one reset assembly. The push block can laterally push against the plurality of clamping blocks to engage with the plurality of positioning holes. Each clamping block is provided with a sliding inclined surface, and the push block has a plurality of pushing inclined surfaces around its periphery. Each pushing inclined surface and a sliding inclined surface can slidably abut against each other. Each reset assembly includes a connector and at least one elastic unit. The connector passes through the plurality of clamping blocks, and the at least one elastic unit springs against one of the clamping blocks and the connector. A piston is also included, which is movable. The piston is movably disposed in the second receiving groove and abuts against the inner annular wall of the second receiving groove. The piston can drive the push block to move relative to the plurality of clamping blocks. The positioning device further includes a plurality of pushing mechanisms. Each positioning hole defines a central axis, which extends along an axial direction. The base further includes a second flow channel and a plurality of receiving holes. The second flow channel connects the plurality of receiving holes and the second receiving groove. The plurality of pushing mechanisms are disposed in the plurality of receiving holes. Each pushing mechanism can move relative to a receiving hole along the axial direction to protrude from one of the outer end faces of the base.

8. The positioning device as claimed in claim 7, wherein the second flow channel communicates with the second receiving groove, and the piston blocks the first flow channel and the second flow channel on opposite sides.

9. As described in claim 3, the positioning device includes two reset components, two slots on opposite sides of the push block, and each clamping block disposed in one of the slots; each screw can pass through the clamping block along the sliding direction of each clamping block; the clamping component further includes a plurality of spring pushers, which spring against the plurality of clamping blocks and the base and are parallel to each elastic unit; one end face of each clamping block is provided with at least one ball, which contacts one inner wall of the base; each positioning hole extends along an axial direction, which is transverse to the sliding direction of each clamping block, and the plurality of positioning holes allow a plurality of positioning structures of the object to be positioned to be detachably accommodated therein, and the plurality of clamping blocks can selectively engage or disengage from a groove of each positioning structure; the positioning device further includes a plurality of push mechanisms, each positioning hole defines a central axis, which extends along an axial direction, and each positioning hole is open along the axial direction; the base further includes a second flow channel and a plurality of The plurality of accommodating holes are connected by a second flow channel. A plurality of pushing mechanisms are disposed within the plurality of accommodating holes. Each pushing mechanism can move axially relative to one of the accommodating holes to protrude from one of the outer end faces of the base. The second flow channel connects to a second receiving groove. The piston blocks the first flow channel and the second flow channel on opposite sides. Each pushing mechanism includes a pushing member, a spring-loaded member, and a sealing ring. The pushing member can move relative to the accommodating hole between a first position and a second position. When the piston... When the pusher is in the first position, the pusher is located inside the receiving hole. When the pusher is in the second position, the pusher protrudes from the outer end face of the base. The spring abutment abuts against the pusher and the inner wall of the receiving hole. The sealing ring is provided on the pusher and abuts against the inner wall of the receiving hole. Each receiving hole is further provided with a limiting ring. The limiting ring can abut against the pusher and move towards the second receiving groove. The limiting ring is provided with a through hole that connects the second receiving groove and the receiving hole.

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