CN210589569U - Positioning device and processing equipment - Google Patents

Abstract

The utility model provides a positioning device, which comprises a clamping piece, a first driving mechanism, a guide piece, a limiting piece, a holding piece and a second driving mechanism; the clamping piece is provided with a first gap and can be opened and closed under the driving of the first driving mechanism so as to change the width of the first gap; the guide piece is adjacent to the clamping piece, a second gap is formed in the guide piece, and the second gap is in butt joint with the second gap; the limiting piece is arranged at one end of the second gap far away from the first gap; the abutting piece can move towards the second gap and approach the limiting piece under the driving of the second driving mechanism, or move towards the outside of the second gap and leave the limiting piece; when the second driving mechanism drives the abutting piece to move towards the second gap and approach the limiting piece, the first driving mechanism drives the clamping piece to close so as to narrow the first gap. The utility model also provides a processingequipment. The utility model discloses a scheme can reliably fix a position the work piece, and then guarantees the machining precision.

Description

Positioning device and processing equipment

Technical Field

The utility model relates to a circuit board processing technology field especially relates to a positioner and processing equipment.

Background

When a circuit board is processed (for example, punched), the circuit board needs to be stably clamped and accurately positioned. The reliable location of circuit board can't be accomplished to traditional frock, influences the machining precision.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a positioner and processing equipment including positioner can reliably fix a position work piece such as circuit board.

A positioning device comprises a clamping piece, a first driving mechanism, a guide piece, a limiting piece, a butting piece and a second driving mechanism; the clamping piece is provided with a first gap and can be opened and closed under the driving of the first driving mechanism so as to change the width of the first gap; the guide piece is adjacent to the clamping piece, a second gap is formed in the guide piece, and the second gap is in butt joint with the second gap; the limiting piece is arranged at one end, far away from the first gap, of the second gap; the abutting piece can move towards the second gap and approach to the limiting piece under the driving of the second driving mechanism, or move towards the outside of the second gap and get away from the limiting piece; when the second driving mechanism drives the abutting piece to move towards the second gap and approach the limiting piece, the first driving mechanism drives the clamping piece to close so as to narrow the first gap.

The machining equipment comprises a machining device and the positioning device, wherein the machining device is used for machining a workpiece positioned by the positioning device.

The utility model discloses a scheme has the holder in first gap, has the guide in second gap, with the locating part that the guide is adjacent through the design to and can the immigration second gap in and be close to the support of locating part and hold, can carry out the centre gripping to two positions on the work piece, thereby fix a position the circuit board. The workpiece can be ensured to accurately reach a processing position through the matching design of the abutting piece and the limiting piece; because the workpiece is limited by two points, the workpiece cannot swing, and therefore the workpiece can be stably borne on the clamping piece and the guide piece. Therefore, the scheme can reliably position the workpiece, and further ensures the machining precision.

Drawings

To more clearly illustrate the structural features and effects of the present invention, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic view of an assembly structure of the positioning device of the present invention at a viewing angle;

FIG. 2 is a schematic view of a portion of the enlarged structure at A in FIG. 1;

FIG. 3 is a schematic view of an assembled structure of the positioning device of FIG. 1 from another perspective;

fig. 4 is a schematic structural view of a holding member in the positioning device of the present invention;

fig. 5 is a schematic view of an assembly structure of the second driving mechanism in the positioning device according to the present invention;

FIG. 6 is a schematic view of a first transmission member of the second drive mechanism of FIG. 5;

fig. 7 is a schematic structural diagram of a position limiting element in the positioning device according to the present invention;

fig. 8 is a schematic view of an assembly structure of the first driving mechanism in the positioning device according to the present invention;

fig. 9 is a partially enlarged schematic view of a portion B in fig. 1.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiment provides a positioning device which can be used for positioning a workpiece. The workpiece includes, but is not limited to, a circuit board. When the workpiece is a circuit board, both sides of the board surface (surface with the normal line in the thickness direction) of the circuit board may be pre-fitted with a positioning portion (not limited to a pin, a column, a block, a bar, or the like) for positioning the circuit board (described in detail later). After the machining is completed, the positioning portion may be removed. Of course, the workpiece may be another workpiece having a shape similar to that of the circuit board.

As shown in fig. 1 to 3, the positioning device 10 may include a clamping member 11, a first driving mechanism 16, a guiding member 12, a limiting member 14, an abutting member 13, and a second driving mechanism 17. In fig. 1, the positioning portions 101 and 102 are shown on the circuit board 100 for clarity, and the surface of the circuit board 100 on which the positioning portions are mounted faces the viewer.

Wherein, the clamping member 11 has a first gap 11a, and the clamping member 11 can be opened and closed under the driving of the first driving mechanism 16 to change the width of the first gap 11 a. The circuit board 100 may be circulated onto the holder 11 and moved on the holder 11 (the surface of the circuit board 100 on which the positioning portions are mounted faces the holder 11). Accordingly, the two positioning portions 101 and 102 of the circuit board 100 extend into the first slot 11a and pass through the first slot 11 a. The first slit 11a may be narrowed to clamp one of the positioning portions 102 so that the circuit board 100 cannot move; of course, the first slit 11a may also be widened to loosen the positioning portion 102, so that the circuit board 100 may be restored to move. In the present embodiment, the clamping member 11 may have a plate shape, and the surface size of the clamping member 11 is determined to stably support the circuit board 100. The clamping member 11 may be a split part, the first gap 11a being a gap between different parts of the clamping member 11. The first slit 11a may extend from one end of the clip 11 to the opposite end to penetrate the entire clip 11, so that the positioning portions 102, 102 of the circuit board 100 enter the first slit 11a from one end of the clip 11; alternatively, the first slit 11a may only penetrate one end of the clamping member 11, that is, the first slit 11a is only formed in a partial area, but not in the entire area, between the two opposite ends of the clamping member 11, and the positioning portions 101 and 102 of the circuit board 100 reach one end of the clamping member 11 and then continue to reach an entrance of the first slit 11a, where the first slit 11a can not enter. The first driving mechanism 16 may be disposed on one side of the clamping member 11 (e.g., below the clamping member 11 in the view of fig. 1), and the first driving mechanism 16 may be any component, mechanism or device capable of providing a driving force. In other embodiments, the shape and configuration of the clamp 11 may be designed as desired.

The guide 12 is adjacent to the clamping member 11, a second gap 12a is formed in the guide 12, and the second gap 12a is abutted with the second gap 12 a. The guide 12 is used to guide the circuit board 100. Specifically, the circuit board 100 can move onto the guide 12 through the clamping member 11, and part of the circuit board stays on the surface of the guide 12, and the other part stays on the surface of the clamping member 11. One positioning portion 101 of the circuit board 100 can pass through the first slit 11a into the second slit 12a, the second slit 12a guides and limits the positioning, and the other positioning portion 102 remains in the first slit 11 a. In the present embodiment, the guide 12 may be an integral member or a split member, and when the split member is used, the second slit 12a is a gap between different portions of the guide 12.

The stopper 14 is disposed at an end of the second slit 12a away from the first slit 11 a. The limiting member 14 is used for limiting the circuit board 100. Specifically, the positioning portion 101 of the circuit board 100 located in the second gap 12a may abut against the limiting member 14, and the limiting member 14 limits the circuit board 100 by abutting against the positioning portion 101 (which will be described later). In this embodiment, the limiting member 14 may be substantially in a square block shape, the limiting member 14 may be spliced with the guiding member 12, and a surface of the limiting member 14 may be opposite to an opening at an end of the second slit 12a far from the first slit 11 a. Preferably, the limiting member 14 can be embedded into the guiding member 12, that is, an installation groove is formed on the guiding member 12, the installation groove is communicated with the second gap 12a, and the limiting member 14 is installed in the installation groove. Of course, the structure and position design of the stopper 14 is not limited thereto.

The abutting member 13 is adjacent to the limiting member 14 and the second gap 12a, and is used for pressing the positioning portion 101 on the circuit board 100, which is located in the second gap 12a, so that the positioning portion abuts against the surface of the limiting member 14, and the circuit board 100 is limited. Specifically, the abutting member 13 can move toward the second gap 12a and approach the limiting member 14 under the driving of the second driving mechanism 17. At this time, the abutting member 13 may contact the positioning portion 101 of the circuit board 100 in the second gap 12a and push the positioning portion to the limiting member 14 (meanwhile, the circuit board 100 also moves toward the limiting member 14). When the supporting member 13 reaches the predetermined position, the supporting member 13 presses the positioning portion 101 against the limiting member 14, so that the positioning portion 101 is stably clamped between the limiting member 14 and the supporting member 13 (which is convenient for processing the circuit board 100). Of course, the supporting member 13 can also be driven by the second driving mechanism 17 to move reversely to gradually withdraw from the second gap 12a and move away from the limiting member 14, so as to release the positioning portion 101, and facilitate the retrieving of the circuit board 100 (after the circuit board 100 is processed, the circuit board 100 needs to be retrieved). When the second driving mechanism 17 drives the abutting member 13 to move into the second gap 12a and approach the limiting member 14, the first driving mechanism 16 drives the clamping member 11 to close so as to narrow the first gap 11a, that is, in the process that the abutting member 13 and the limiting member 14 clamp one positioning portion 101, the clamping member 11 gradually clamps the other positioning portion 102, so that two opposite portions on the circuit board 100 are limited, and the circuit board 100 is positioned. In the present embodiment, the first driving mechanism 16 and the second driving mechanism 17 can be driven substantially synchronously, so that the action of the abutting member 13 approaching the limiting member 14 and clamping one positioning portion 101 together with the limiting member 14 starts and ends substantially simultaneously with the action of the clamping member 11 clamping the other positioning portion 102. Both the holding member 13 and the second driving mechanism 17 can be located at one side of the guide member 12 (e.g., below the guide member 12 in the view of fig. 1). The holding member 13 may have any suitable structure, and the second driving mechanism 17 may be any component, mechanism or device capable of providing a driving force.

As shown in fig. 1-3, in the present embodiment, the positioning device 10 may further include a platform 15, the clamping member 11, the guiding member 12, and the limiting member 14 are mounted on one surface of the platform 15, and the abutting member 13, the first driving mechanism 16, and the second driving mechanism 17 are mounted on the other surface of the platform 15. The platform 15 may be provided with a plurality of mounting structures, such as mounting grooves, mounting platforms, positioning holes, cavities, slits, etc., to mount and support the above components/mechanisms well, thereby facilitating the accommodation and movement of the components/mechanisms. In addition, the surface of the platform 15 may also be used to carry the circuit board 100. By designing the platform 15, the positioning device 10 can be compact in structure and accurate in positioning. Of course, the design of the platform 15 is not essential.

The positioning device 10 of the present embodiment is configured with a clamping member 11 having a first gap 11a, a guiding member 12 having a second gap 12a, a limiting member 14 adjacent to the guiding member 12, and a supporting member 13 capable of moving into the second gap 12a and approaching to the limiting member 14, so as to clamp two locations on the circuit board 100, thereby positioning the circuit board 100. Through the matching design of the abutting piece 13 and the limiting piece 14, the circuit board 100 can be ensured to accurately reach the processing position; since the circuit board 100 is limited by two points, the circuit board 100 does not shake, and therefore the circuit board 100 can be smoothly carried on the clamping member 11 and the guide member 12. Therefore, the positioning device 10 can reliably position the circuit board 100, thereby ensuring the processing precision.

As shown in fig. 4, in one embodiment, the holding member 13 may include a pivot portion 132 and a holding portion 131 that are integrally connected. As shown in fig. 1-4, the pivoting portion 132 is connected to the second driving mechanism 17, and the pivoting portion 132 can be driven by the second driving mechanism 17 to rotate. When rotating, the pivot portion 132 can drive the supporting portion 131 to rotate. The abutting portion 131 can be extended into the second gap 12a and close to the limiting member 14, or extended out of the second gap 12a and far away from the limiting member 14. Through the structural design and the movement design of the abutting piece 13, the advancing and the retreating of the abutting piece 13 can be conveniently realized, and the limiting and the releasing of the circuit board 100 are realized through a simple design. In other embodiments, the holding member 13 may have other structures and motions.

As shown in fig. 4, in an embodiment, an end of the supporting portion 131 away from the pivoting portion 132 may be bent toward the limiting member 14 to form a hook 131a, and an included angle between the hook 131a and the rest of the supporting portion 131 is substantially a right angle. When the circuit board 100 needs to be limited, the hook 131a can move toward the limiting member 14 and press on the positioning portion 101, so that the positioning portion 101 is sandwiched between the hook 131a and the limiting member 14. The significance of designing the hook 131a is: when the driving force is constant, the contact area of the hook 131a with the positioning part 101 is smaller, and the positioning part 101 can be more accurately pressed to be pushed to move; moreover, the area of the hook 131a in contact with the positioning portion 101 has a greater pressure, and the positioning portion 101 can be pressed against the stopper 14 more firmly, thereby increasing the positioning accuracy of the circuit board 100. In other embodiments, the hook 131a is not necessary, that is, the holding portion 131 may not be bent, but may be a rod, a block, a bar, or the like in a "straight-up and straight-down" manner.

As shown in fig. 5, in one embodiment, the second driving mechanism 17 may include a driving assembly 172 and a fixing seat 171. Referring to fig. 4 and 5, the adjacent portions 1321, 1322 of the pivot portion 132 are respectively rotatably connected to the driving element 172 and the fixing base 171. The driving component 172 is used for driving the pivoting portion 132 to rotate around the fixing seat 171. When the pivoting portion 132 rotates around the fixing seat 171, the pivoting portion 132 also rotates relative to the driving element 172. In this way, the advance and the retreat of the holding member 13 are realized by a simple design, and the limit and the release of the circuit board 100 are further realized. In other embodiments, such a design is not required.

As shown in fig. 5, in one embodiment, the driving assembly 172 may include a first driving source 1722 and a first transmission member 1721 connected thereto. The first driving source 1722 is used for driving the first transmission piece 1721 to reciprocate; as shown in fig. 5 and fig. 4, one end of the first transmission element 1721 away from the first driving source 1722 is rotatably connected to the pivot portion 132 to drive the pivot portion 132 to rotate around the fixing base 171. The first driving source 1722 may be, for example, a cylinder, an output shaft of which has a screw thread. As shown in fig. 6, the first transmission member 1721 may be, for example, a bracket including a connecting beam 17212 and two transmission arms 17211, 17213, where the two transmission arms 17211, 17213 are respectively connected to two opposite ends of the connecting beam 17212, one end of each transmission arm, which is away from the connecting beam 17212, is rotatably connected to the pivot portion 132 (for example, the abutting member 13 may be located between the two transmission arms 17211, 17213, and the two transmission arms 17211, 17213 are respectively rotatably engaged with two opposite surfaces of the pivot portion 132), a connection screw hole 17212a is formed in a portion of the connecting beam 17212, which is located between the two transmission arms 17211, 17213, and the output shaft of the air cylinder is inserted into the connection screw hole 17212a to form a threaded connection. The output shaft will drive the first transmission member 1721 to reciprocate after stretching, and the abutting member 13 will rotate under the combined action of the first transmission member 1721 and the fixed seat 171. Of course, in the present embodiment, the first driving source 1722 may be any member, mechanism, or device that can provide a driving force, and the first transmission 1721 may have any suitable structure. By adopting the driving component 172, the driving design can be simplified, the driving precision can be ensured, the accurate advance and return of the holding piece 13 can be realized, and the reliable limit of the circuit board 100 can be realized. In other embodiments, such a design of the drive assembly 172 is not required.

As shown in fig. 7, in one embodiment, the limiting member 14 may have a limiting groove 14a, and the opening of the limiting groove 14a faces the second slit 12 a. The limiting groove 14a may extend from one surface of the limiting member 14 to the opposite surface along the thickness direction of the limiting member 14. The cross-sectional shape of the position-limiting groove 14a may be designed as required to allow the positioning portion 101 to be caught therein (described later), for example, the cross-sectional shape of the position-limiting groove 14a may be formed by connecting a partial rectangle and a partial trapezoid. The opening of the stopper groove 14a may abut against the second slit 12a, so that the positioning portion 101 may enter the stopper groove 14a from the second slit 12a (described later). Accordingly, the abutting piece 13 can move towards the second gap 12a and approach the limiting groove 14a under the driving of the second driving mechanism 17. When the abutting piece 13 reaches the set position, the positioning portion 101 is pressed on the groove wall of the limiting groove 14a by the abutting piece 13, so that the positioning portion 101 is limited between the groove wall of the limiting groove 14a and the abutting piece 13, thereby facilitating the positioning of the circuit board 100. The design of the position-limiting groove 14a can prevent the positioning portion 101 from shaking, and can increase the position-limiting precision of the positioning portion 101, thereby increasing the positioning reliability of the circuit board 100. In other embodiments, the limiting groove 14a is not necessary, that is, the limiting member 14 can limit the positioning portion 101 by a flat surface.

In one embodiment, the positioning device 10 may further include a sensor mounted on the guide 12 proximate to the stop 14. For example, the sensor may be mounted in a mounting hole in the guide 12 adjacent the stop 14. The sensor is used for generating a detection signal when the positioning portion 101 is detected (the positioning portion 101 travels from the first gap 11a to the second gap 12 a. when the positioning portion 101 enters the detection distance of the sensor, the sensor can send out the detection signal.), the detection signal is used for triggering the first driving mechanism 16 and the second driving mechanism 17 to provide driving force, so that the abutting member 13 moves towards the second gap 12a and approaches the limiting member 14, and the clamping member 11 is closed to narrow the first gap 11a, so as to position the circuit board 100. The sensor may be any device capable of sensing the target object. It should be understood that the detection signals of the sensors are sent to the controller for processing, and the first driving mechanism 16 and the second driving mechanism 17 are also controlled by the controller. The controller may be part of the positioning device 10 (e.g., integrated with the sensor) or may be a control device external to the positioning device 10. Through the design sensor, can carry out the location operation of circuit board 100 voluntarily, greatly promote production efficiency. In other embodiments, a sensor is not required.

As shown in fig. 1, in one embodiment, the clamping member 11 may include a first clamping member 111 and a second clamping member 112, and the first clamping member 111 and the second clamping member 112 are arranged side by side and spaced apart from each other with a first gap 11a formed therebetween. The first driving mechanism 16 is connected to the first clamping member 111 to drive the first clamping member 111 to move away from or close to the second clamping member 112 to change the width of the first gap 11 a; the movement pattern of the first clamp 111 may be a translation. The second clamp 112 may be fixed (e.g., to the platform 15). The first clamping member 111 and the second clamping member 112 may be plate-shaped, and have a surface size that can stably support the circuit board 100. The clamping piece 11 is set to be only single-side movable, so that the motion control can be simplified, the motion precision is improved, and the positioning precision is further facilitated. In other embodiments, the first and second clamping members 111, 112 may each move toward or away from each other.

As shown in fig. 8, in one embodiment, the first driving mechanism 16 may include a second driving source 161 and a second transmission member 163. The second transmission member 163 is rotatably connected between the second driving source 161 and the first clamping member 111, i.e. the second transmission member 163 is located between the second driving source 161 and the first clamping member 111 and is rotatably connected to both of them. The second transmission member 163 includes, but is not limited to, a plate, a block, and a rod. The second driving source 161 is used for driving the second transmission member 163 to rotate back and forth so as to drive the first clamping member 111 to move away from or close to the second clamping member 112. The second driving source 161 may be any member/mechanism/device that can provide a driving force, such as a cylinder. When the second driving source 161 is an air cylinder, the output shaft of the air cylinder can be screwed to an adapter 162, and the adapter 162 is rotatably connected to the second transmission member 163, so as to solve the problem that the output shaft of the air cylinder is inconvenient to directly rotate and screw with the second transmission member 163. By designing the transmission member, the moving direction output by the second driving source 161 can be converted into the moving direction of the first clamping member 111 (the two moving directions may have an included angle, for example, 90 degrees). By adopting the first driving mechanism 16, the driving design can be simplified, the driving precision can be ensured, the accurate opening and closing of the clamping piece 11 can be realized, and the reliable limiting of the circuit board 100 can be realized. In other embodiments, such a design of the first drive mechanism 16 is not required.

As shown in fig. 8, in one embodiment, the first drive mechanism 16 may further include a movable rod 164 and a third transmission 165. One end of the movable rod 164 is rotatably connected to the second transmission member 163, the other end thereof is rotatably connected to the third transmission member 165, and the third transmission member 165 is rotatably connected between the movable rod 164 and the first clamping member 111. When the second driving source 161 outputs the driving force, the second transmission member 163 rotates reciprocally to drive the movable rod 164 to move reciprocally, thereby driving the third transmission member 165 to rotate reciprocally. Therefore, under the driving of the second transmission piece 163 and the third transmission piece 165, the first clamping member 111 moves away from or close to the second clamping member 112. That is, in the embodiment, two positions on the first clamping member 111 are driven simultaneously (two points are stressed), and at this time, the movement of the first clamping member 111 is smoother, and no shaking or instability occurs. The second transmission member 163 and the third transmission member 165 may be opposite to the two ends of the first clamping member 111 as much as possible to uniformly apply force to the first clamping member 111. In other embodiments, the movable rod 164 and the third transmission member 165 are not required, and the first clamping member 111 may be stressed at a single point.

As shown in fig. 9, in one embodiment, the width of the portion of the first slit 11a adjacent to the second slit 12a is greater than the width of the remaining portion of the first slit 11 a; and/or the width of the portion of the second slit 12a adjacent to the first slit 11a is greater than the width of the remaining portion of the second slit 12 a. That is, at the intersection of the first slit 11a and the second slit 12a, the slit widths of both are larger, and the slit widths of the other positions are smaller. Preferably, the slit width may be gradually changed in a wider area of the first slit 11a and the second slit 12 a. The variable slit width design of the first slit 11a and the second slit 12a facilitates the positioning portion 101 on the circuit board 100 to enter the second slit 12a from the first slit 11a or retreat from the second slit 12a into the first slit 11a more easily and without obstruction. In other embodiments, the slit width of the first slit 11a and/or the second slit 12a may be constant.

The embodiment also provides a processing device, which comprises a processing device and any one of the positioning devices 10. The machining device is used for machining the workpiece positioned by the positioning device 10. For example, the processing device may be a punching device, or may be a device that performs other processing. Because the positioning device 10 can reliably position the workpiece, the processing precision of the processing equipment is also ensured.

Claims (12)

1. A positioning device is characterized in that a positioning device is arranged on a base,

the clamping device comprises a clamping piece, a first driving mechanism, a guide piece, a limiting piece, a butting piece and a second driving mechanism; the clamping piece is provided with a first gap and can be opened and closed under the driving of the first driving mechanism so as to change the width of the first gap; the guide piece is adjacent to the clamping piece, a second gap is formed in the guide piece, and the second gap is in butt joint with the second gap; the limiting piece is arranged at one end, far away from the first gap, of the second gap; the abutting piece can move towards the second gap and approach to the limiting piece under the driving of the second driving mechanism, or move towards the outside of the second gap and get away from the limiting piece; when the second driving mechanism drives the abutting piece to move towards the second gap and approach the limiting piece, the first driving mechanism drives the clamping piece to close so as to narrow the first gap.

2. The positioning device of claim 1,

the abutting part comprises a pivoting part and an abutting part which are connected into a whole, the pivoting part is connected with the second driving mechanism, and the second driving mechanism can drive the pivoting part to rotate so as to drive the abutting part to rotatably extend into the second gap and approach the limiting part or rotatably extend out of the second gap and keep away from the limiting part.

3. The positioning device of claim 2,

one end of the abutting part, which is far away from the pivoting part, is bent towards the limiting part to form a hook.

4. The positioning device of claim 2,

the second driving mechanism comprises a driving component and a fixed seat, adjacent parts on the pivoting part are respectively in rotating connection with the driving component and the fixed seat, and the driving component can drive the pivoting part to rotate around the fixed seat; when the pivoting part rotates around the fixed seat, the pivoting part also rotates relative to the driving component.

5. The positioning device of claim 4,

the driving assembly comprises a first driving source and a first transmission piece which are connected, the first driving source is used for driving the first transmission piece to reciprocate, one end, far away from the first driving source, of the first transmission piece is connected with the pivoting portion in a rotating mode, and therefore the pivoting portion is driven to rotate around the fixing base.

6. The positioning device according to any one of claims 1 to 4,

the limiting piece is provided with a limiting groove, and an opening of the limiting groove faces the second gap; the abutting piece can move towards the second gap under the driving of the second driving mechanism and is close to the limiting groove.

7. The positioning device according to any one of claims 1 to 4,

the positioning device comprises a sensor, the sensor is mounted on the guide piece and close to the limiting piece, the sensor is used for generating a detection signal, the detection signal is used for triggering the first driving mechanism and the second driving mechanism to provide driving force, so that when the abutting piece moves towards the second gap and approaches the limiting piece, the clamping piece is closed to narrow the first gap.

8. The positioning device according to any one of claims 1 to 4,

the clamping piece comprises a first clamping piece and a second clamping piece which are arranged side by side at intervals, the first gap is formed between the first clamping piece and the second clamping piece, and a first driving mechanism is connected with the first clamping piece to drive the first clamping piece to be far away from or close to the second clamping piece to move so as to change the width of the first gap.

9. The positioning device of claim 8,

the first driving mechanism comprises a second driving source and a second transmission piece, the second transmission piece is rotatably connected between the second driving source and the first clamping piece, and the second driving source is used for driving the second transmission piece to rotate in a reciprocating mode so as to drive the first clamping piece to be far away from or close to the second clamping piece to move.

10. The positioning device of claim 9,

the first driving mechanism comprises a movable rod and a third transmission piece, one end of the movable rod is rotatably connected with the second transmission piece, the other opposite end of the movable rod is rotatably connected with the third transmission piece, and the third transmission piece is rotatably connected between the movable rod and the first clamping piece; when the second transmission piece rotates in a reciprocating mode, the movable rod can be driven to move in a reciprocating mode so as to drive the third transmission piece to rotate in a reciprocating mode, and therefore under the driving of the second transmission piece and the third transmission piece together, the first clamping piece moves away from or close to the second clamping piece.

11. The positioning device according to any one of claims 1 to 4,

the width of the part of the first gap close to the second gap is larger than that of the rest part of the first gap, and/or the width of the part of the second gap close to the first gap is larger than that of the rest part of the second gap.

12. A processing device is characterized in that,

comprising a machining device for machining a workpiece positioned by the positioning device and a positioning device according to any of claims 1-11.

Images