CN107186519B

CN107186519B - Positioning mechanism

Info

Publication number: CN107186519B
Application number: CN201710476416.4A
Authority: CN
Inventors: 程品
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2017-06-21
Filing date: 2017-06-21
Publication date: 2024-03-19
Anticipated expiration: 2037-06-21
Also published as: CN107186519A

Abstract

The invention discloses a positioning mechanism, which comprises a driving mechanism, a first positioning pin and a second positioning pin, wherein the driving mechanism is provided with an extending end which can extend and retract relative to the driving mechanism, and the extending end is connected with the first positioning pin and the second positioning pin through a connecting plate; the device also comprises a fixed block used for fixing the driving mechanism at the lower end of the fixed block, and a positioning block used for placing a workpiece is arranged at the upper end of the fixed block; the fixed block is internally provided with a moving space for the connecting plate, the first locating pin and the second locating pin to move, and the first locating pin and the second locating pin are in sliding fit with the locating block and can penetrate through the locating block to extend out of the locating block or retract into the locating block. The positioning mechanism can accurately position the workpiece to be processed; but also can avoid interference to workpiece processing during blanking.

Description

Positioning mechanism

Technical Field

The invention relates to the field of machining in the metal industry, in particular to positioning of a workpiece, and more particularly relates to a positioning mechanism.

Background

In the metal machining industry, it is necessary to position and then machine a workpiece to be machined. But is particularly important for fine positioning problems in the metal working industry.

However, in production practice, there is a problem that the positioning hole of the workpiece to be machined is not in the machining structure, that is, the region where the positioning hole of the workpiece to be machined is to be milled, which requires blanking (separating the material from the base material) at that point. While in blanking, the common locating pin can certainly interfere with processing. In order to solve the problems, the prior art generally adopts the following method, wherein the positioning pin is stopped to be taken out during the processing process, and then blanking is performed; or milling off the pins in the blanking process.

It is apparent that the above methods have drawbacks in that the former causes an increase in the working time, and the latter causes a waste of the material of the positioning pin.

Disclosure of Invention

One purpose of the invention is to provide a device that can accurately position a workpiece to be processed; but also can avoid the interference to the workpiece during blanking.

According to a first aspect of the present invention, there is provided a positioning mechanism comprising a drive mechanism, a first positioning pin and a second positioning pin, the drive mechanism being provided with an extension end which is extendable and retractable relative thereto, the extension end being connected to the first positioning pin and the second positioning pin by a connecting plate; the device also comprises a fixed block used for fixing the driving mechanism at the lower end of the fixed block, and a positioning block used for placing a workpiece is arranged at the upper end of the fixed block; the fixed block is internally provided with a moving space for the connecting plate, the first locating pin and the second locating pin to move, and the first locating pin and the second locating pin are in sliding fit with the locating block and can penetrate through the locating block to extend out of the locating block or retract into the locating block.

Preferably, the moving space is arranged at the lower part of the fixed block, and the first locating pin and the second locating pin are in sliding fit with the upper part of the fixed block.

Preferably, a limiting block is arranged at the lower part of the fixed block, a groove and an avoidance channel are arranged at the position of the limiting block corresponding to the moving space, the avoidance channel is arranged at the lower part of the groove and is communicated with the groove, the bottom surface of the connecting plate is in releasable type against with the bottom surface of the groove, and the top surface of the connecting plate is in releasable type against with the plane of the fixed block facing the groove.

Preferably, the upper part of the limiting block is connected with the fixed block through a positioning component, and the lower part of the limiting block is fixed with the fixed block through a fastening component.

Preferably, the positioning component is arranged close to the corner of the upper part of the limiting block, and the fastening component is arranged close to the corner of the lower part of the limiting block.

Preferably, the connecting plate is fixed to the projecting end by a fastening member, and the first positioning pin and the second positioning pin are fixed to the connecting plate.

Preferably, the connecting plate is provided with two clamping grooves at positions on two sides of the extending end, and the first positioning pin and the second positioning pin are clamped in the corresponding clamping grooves.

Preferably, the first positioning pin and the second positioning pin are in clearance fit with the corresponding clamping grooves.

Preferably, the first positioning pin and the second positioning pin are in close sliding fit with the positioning block.

Preferably, the driving mechanism is a cylinder.

The inventors of the present invention found that, in the prior art, a common positioning pin must interfere with the processing at the time of blanking. The technical task to be achieved or the technical problem to be solved by the present invention is therefore a new technical solution, which has never been conceived or not yet been contemplated by the person skilled in the art.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a cross-sectional view of a positioning mechanism of the present invention.

Fig. 2 is a left side view of the positioning mechanism of the present invention.

Fig. 3 is a schematic structural view of a first positioning pin and a second positioning pin of the positioning mechanism and a connecting plate.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1 to 3, the positioning mechanism of the present invention includes a driving mechanism 1, a first positioning pin 2, a second positioning pin 3, a fixed block 6, and a positioning block 5. Preferably, the driving mechanism 1 may be a cylinder. The driving mechanism 1 is provided with an extending end 11 which can extend and retract relative to the driving mechanism, the extending end 11 is connected with the first positioning pin 2 and the second positioning pin 3 through the connecting plate 4, and the first positioning pin 2 and the second positioning pin 3 can do telescopic motion under the driving of the driving mechanism. The driving mechanism 1 is arranged at the lower end of the fixed block 6, the positioning block 5 is arranged at the upper end of the fixed block, and a workpiece 10 to be processed is placed on the positioning block 5. The fixed block 6 is internally provided with a moving space for the connecting plate 4, the first positioning pin 2 and the second positioning pin 3 to move so as to prevent interference between the connecting plate 4 and the fixed block 6 when the first positioning pin 2 and the second positioning pin 3 do telescopic movement. The first positioning pin 2 and the second positioning pin 3 are slidably connected with the positioning block 5, and can extend out of the positioning block 5 or retract into the positioning block. In this way, before the workpiece 10 to be processed is processed, the first positioning pin 2 and the second positioning pin 3 slide and stretch out relative to the positioning block 5 under the drive of the driving mechanism 1, and play a role in positioning the workpiece 10 to be processed on the positioning block 5. When the workpiece 10 is required to be blanked, the first positioning pin 2 and the second positioning pin 3 slide and retract relative to the positioning block 5 under the drive of the driving mechanism 1, so that the loss caused by the need of processing the first positioning pin 2 and the second positioning pin 3 in the blanking process is avoided.

Preferably, the first positioning pin 2 and the second positioning pin 3 are in sliding fit with the positioning block 5, so that the first positioning pin 2 and the second positioning pin 3 are prevented from shaking in sliding, and positioning accuracy is ensured.

Referring to fig. 1, the moving space is disposed at the lower portion of the fixed block 6, the first positioning pin 2 and the second positioning pin 3 are slidably connected with the upper portion of the fixed block 6, and the upper portion of the fixed block 6 plays a guiding role in the telescopic movement of the first positioning pin 2 and the second positioning pin 3, so that the extending or retracting movement of the first positioning pin 2 and the second positioning pin 3 is more stable.

Referring to fig. 1, a stopper 7 is provided at a lower portion of the fixed block 6, and a groove 71 and a relief passage 72 are provided at a position of the stopper 7 corresponding to the moving space. The connection plate 4, the first positioning pin 2 and the second positioning pin 3 can move within the groove 71. The escape passage 72 is provided at a lower portion of the groove 71, and the escape passage 72 has a width smaller than that of the groove 71 and communicates with the groove 71. When the connecting plate 4, the first positioning pin 2 and the second positioning pin 3 move downwards, the parts of the first positioning pin 2 and the second positioning pin 3, which are positioned at the lower part of the connecting plate 4, can be avoided in the avoidance channel 72, so that the influence on the movable distance of the first positioning pin 2 and the second positioning pin 3 is avoided. Further, the bottom surface of the connecting plate 4 is releasably abutted against the bottom surface 711 of the groove, and the top surface of the connecting plate 4 is releasably abutted against the plane 61 of the fixing block facing the groove 71. That is, when the first positioning pin 2 and the second positioning pin 3 make the projecting movement, the connection plate 4 moves upward in the groove 71, and when the top surface of the connection plate 4 abuts against the plane 61 of the fixing block facing the groove 71, the projecting movement of the first positioning pin 2 and the second positioning pin 3 is restricted to reach the most distant projecting position. When the first positioning pin 2 and the second positioning pin 3 make a retracting movement, the connection plate 4 moves downward in the groove 71, and when the bottom surface of the connection plate 4 abuts against the bottom surface 711 of the groove, the retracting movement of the first positioning pin 2 and the second positioning pin 3 is restricted to the farthest retracting position.

Referring to fig. 1, the upper part of the stopper 7 is connected to the fixed block 6 via a positioning member 8, and the position between the stopper 7 and the fixed block 6 is determined. The stopper 7 is fixed to the fixed block 6 by a fastening member 9 at the lower portion of the stopper 7. The positioning member may be a pin, and the fastening member may be a bolt, but is not limited thereto.

Preferably, referring to fig. 2, the positioning member 8 is disposed near the corner of the upper portion of the stopper 7, and the fastening member 9 is disposed near the corner of the lower portion of the stopper 7, so that positioning and fixing can be accomplished at the corner of the stopper 7. Preferably, the two positioning parts 8 arranged at the edges and corners are arranged in opposite directions, so that the relative movement between the limiting block 7 and the fixed block 6 is reduced, and the positioning is more accurate. Similarly, the two fixing parts 9 arranged at the edges and corners are arranged in opposite directions, so that the fixing is firmer.

Referring to fig. 3, the connection plate 4 is fixed to the projecting end 11 by a fastening member 12, and the first and second positioning pins 2 and 3 are fixed to the connection plate 4. Bolts may be used here to secure the connection plate 4 to the projecting end 11, but are not limited to the bolts.

Preferably, the connecting plate 4 is provided with two clamping grooves 41 at positions on two sides of the extending end 11, and the first positioning pin 2 and the second positioning pin 3 are clamped in the corresponding clamping grooves 41, so that the clamping installation not only reduces parts required for installation, but also is firm and reliable in installation.

Preferably, the first positioning pin 2 and the second positioning pin 3 are in clearance fit with the corresponding clamping grooves 41, so that the clamping phenomenon of the first positioning pin 2 and the second positioning pin 3 when floating up and down caused by errors of the driving mechanism 1 and the like is prevented.

While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The positioning mechanism is characterized by comprising a driving mechanism, a first positioning pin and a second positioning pin, wherein the driving mechanism is provided with an extending end which can extend and retract relative to the driving mechanism, and the extending end is connected with the first positioning pin and the second positioning pin through a connecting plate; the device also comprises a fixed block used for fixing the driving mechanism at the lower end of the fixed block, and a positioning block used for placing a workpiece is arranged at the upper end of the fixed block; the fixed block is internally provided with a moving space for the connecting plate, the first locating pin and the second locating pin to move, the first locating pin and the second locating pin are in close sliding fit with the locating block, and the first locating pin and the second locating pin can penetrate through the locating block to extend out of the locating block so as to locate a workpiece on the locating block; or retract into the positioning block to release the positioning of the workpiece on the positioning block;

the moving space is arranged at the lower part of the fixed block, and the first locating pin and the second locating pin are in sliding fit with the upper part of the fixed block; a limiting block is arranged at the lower part of the fixed block, a groove and an avoidance channel are arranged at the position of the limiting block corresponding to the moving space, and the avoidance channel is arranged at the lower part of the groove and communicated with the groove;

the connecting plate is fixed on the extending end through a fastening part, and the first locating pin and the second locating pin are fixed on the connecting plate.

2. The positioning mechanism of claim 1, wherein a bottom surface of the connecting plate is releasably abutted against a bottom surface of the groove, and a top surface of the connecting plate is releasably abutted against a plane of the fixed block facing the groove.

3. The positioning mechanism according to claim 2, wherein an upper portion of the stopper is connected to the fixed block by a positioning member, and a lower portion of the stopper is fixed to the fixed block by a fastening member.

4. A positioning mechanism according to claim 3, wherein the positioning member is disposed adjacent to the corner of the upper portion of the stopper, and the fastening member is disposed adjacent to the corner of the lower portion of the stopper.

5. The positioning mechanism according to claim 1, wherein the connecting plate is provided with two clamping grooves at positions on both sides of the protruding end, and the first positioning pin and the second positioning pin are clamped in the corresponding clamping grooves.

6. The positioning mechanism of claim 5, wherein the first and second positioning pins are in clearance fit with respective corresponding detents.

7. The positioning mechanism of any of claims 1-4, wherein the drive mechanism is a cylinder.