Pitch changing mechanism and material moving device

Abstract

The utility model provides a pitch changing mechanism and a material moving device. The pitch changing mechanism comprises a supporting piece, a pitch changing driving piece, a plurality of positioning pieces, a plurality of connecting pieces and a clamping mechanism. At least one of the multiple positioning pieces is fixedly connected to the supporting piece, and the other positioning pieces are arranged on the supporting piece in a sliding mode within a set stroke; the variable-pitch driving piece is configured to drive at least one positioning piece slidably connected to the supporting piece to move so as to drive the other positioning pieces slidably connected to the supporting piece to move through the multiple connecting pieces. The clamping mechanism is configured to clamp the workpieces on the positioning pieces from the two opposite sides of each positioning piece after the multiple positioning pieces drive the multiple workpieces to change the distance. According to the distance changing mechanism, preliminary positioning of the workpiece in the distance changing process is achieved; after the distance change of the multiple workpieces is completed, the workpieces on the positioning piece are clamped through the clamping mechanism, accurate positioning of the workpieces is achieved, and the positioning accuracy of the workpieces entering the next manufacturing process is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of material conveying, and in particular to a distance-changing mechanism and a material-moving device. Background Art

[0002] In the process of processing and installation, a group of workpieces need to be transformed from centralized packaging to a dispersed state after they are received, so as to facilitate the positioning and grabbing of the subsequent work sections. When the workpieces are transformed from a centralized state to a dispersed state, it is necessary to perform a distance-changing operation on multiple workpieces. Currently, manual operations have low precision and great difficulty, which is not conducive to ensuring the precision of the workpieces in the process. Utility Model Content

[0003] In view of this, the present application provides a pitch changing mechanism to improve the pitch changing accuracy of a workpiece.

[0004] The present application proposes a variable distance mechanism, which includes a support, a variable distance driving member, a plurality of connecting members, a plurality of positioning members and a clamping mechanism. The variable distance driving member is arranged on the support; at least one of the plurality of positioning members is fixedly connected to the support, and the remaining positioning members are respectively slidably arranged on the support within a set stroke; the positioning member is configured to carry and adsorb workpieces; and each two adjacent positioning members are connected in relative sliding connection through a connecting member. The variable distance driving member is configured to drive at least one positioning member slidably connected to the support to move, so as to drive the remaining positioning members slidably connected to the support to move through the plurality of connecting members; the clamping mechanism is configured to clamp the workpieces on the positioning members from the opposite sides of each positioning member after the plurality of positioning members drive the plurality of workpieces to change their distances.

[0005] The above-mentioned pitch changing mechanism drives multiple positioning members to move through the pitch changing driving members, and the positioning members adsorb the workpieces to achieve preliminary positioning of the workpieces during the pitch changing process; after the pitch changing of multiple workpieces is completed, the workpieces on the positioning members are clamped by the clamping mechanism to achieve precise positioning of the workpieces, which is beneficial to the positioning accuracy of the workpieces entering the next process.

[0006] In a possible embodiment, the positioning member includes a positioning body and at least one suction cup, the positioning body is provided with an adsorption channel, and the adsorption channel is configured to be connected to a suction device; the suction cup is connected to the positioning body; the suction cup is provided with an adsorption port on the side away from the positioning body, the adsorption port is connected to the adsorption channel and is configured to adsorb the workpiece; the positioning body is provided with multiple supporting surfaces, the supporting surfaces are configured to support and position the workpiece, and the supporting surfaces and the suction cups are arranged alternately.

[0007] In the above embodiment, the plurality of support surfaces are configured to support the workpiece along the third direction to improve the accuracy of the positioning member in positioning the workpiece. The support surfaces and the suction cups are arranged alternately to improve the uniformity of the arrangement of the suction cups along the positioning body to optimize the distribution of the force of the plurality of suction cups to absorb the workpiece.

[0008] In a possible embodiment, the clamping mechanism includes a plurality of first clamping members, a plurality of second clamping members, a clamping drive, and a first support plate and a second support plate connected to the clamping drive; the plurality of first clamping members are sequentially arranged on the first support plate, and the plurality of second clamping members are sequentially arranged on the second support plate; the clamping drive is configured to drive the first support plate and the second support plate to move in opposite directions to drive each first clamping member and a corresponding second clamping member to move in opposite directions to clamp or release the corresponding workpiece.

[0009] In the above embodiment, the first support plate and the second support plate drive multiple first clamping members and multiple second clamping members to move, so that when multiple positioning members drive multiple workpieces to move to change the distance and preliminarily position the workpieces, the first clamping members and the second clamping members are clamped on opposite sides of the workpieces to achieve secondary positioning of the multiple workpieces, so as to further improve the positioning accuracy of the workpieces.

[0010] In a possible embodiment, the distance changing mechanism also includes a transfer drive member, and the clamping mechanism is connected to the transfer drive member; the transfer drive member is configured to drive the first clamping member to move between two adjacent positioning members, and the second clamping member to move between another two adjacent positioning members, or to move the first clamping member and the second clamping member out from between multiple positioning members.

[0011] In the above embodiment, the plurality of positioning members drive the plurality of workpieces to disperse, and the transfer drive member drives the first clamping member on the first support plate and the second clamping member on the second support plate to move between the plurality of positioning members, thereby making the first clamping member and the corresponding second clamping member located on opposite sides of the workpiece, so as to facilitate adapting to the situation where the spacing between the plurality of workpieces is small before the distance is changed. In addition, the transfer drive member drives the first support plate and the second support plate and drives the first clamping member and the second clamping member to move out from between the plurality of positioning members, so as to facilitate the placement of the workpiece on the positioning member, and reduce the risk of interference with the workpiece or the loading mechanism for loading the workpiece.

[0012] In a possible embodiment, the variable pitch drive member includes a rotating drive member, a gear and two racks; the two racks are disposed on both sides of the gear and are respectively meshed with the gears; the rotating drive member is configured to drive the gear to rotate so as to drive the two racks to move in opposite directions; two positioning members located at both ends of the multiple positioning members are connected to the two racks in a one-to-one correspondence; a positioning member located in the middle of the multiple positioning members is fixedly connected to the support member; and each two adjacent positioning members are enabled to slide relative to each other within a set stroke through a connecting member.

[0013] In the above embodiment, the gear drives the two racks to move in opposite directions, so that the multiple positioning members are divided into two groups moving in opposite directions, and a driving structure is realized through a rotating driving member, thereby reducing the movement stroke of the positioning members, so as to facilitate adapting to the large span distance change between multiple workpieces.

[0014] In a possible implementation, the connecting member is provided with a stopper and a connecting member, wherein the connecting member is fixedly connected to one of two adjacent positioning members, and the stopper stops at a side of the other of the two adjacent positioning members away from the connecting member.

[0015] In the above embodiment, two adjacent positioning members are relatively far apart until one of the positioning members is stopped by the stop portion, and the maximum distance between the two positioning members is reached; the two positioning members are relatively close to each other until the two positioning members abut against each other, and the minimum distance between the two positioning members is reached; thereby, the two adjacent positioning members are able to slide relative to each other within a set stroke.

[0016] In a possible implementation, one of two adjacent positioning members is provided with an avoidance groove, which is configured to pass through the positioning member along the sliding direction of the positioning member and is used to avoid a connecting member connected between the two adjacent positioning members.

[0017] In the above embodiment, the connecting member moves in the avoidance groove of the positioning member, which is beneficial for the layout of the connecting member between the two positioning members, thereby reducing the space occupied outside the positioning members and facilitating the reduction of the size of the pitch-changing mechanism.

[0018] In a possible implementation, the support member includes a support body and a guide rod, the guide rod is fixed to the support body, the positioning member is provided with a sliding hole, and the guide rod is sequentially passed through the sliding holes of the plurality of positioning members.

[0019] In the above embodiment, the guide rod provides movement guidance and support for the multiple positioning members, so that the multiple positioning members can move smoothly relative to each other.

[0020] In a possible implementation, the pitch changing mechanism further includes a sensor, and the sensor is configured to sense positions of the plurality of positioning members to provide feedback on the pitch changing completion status of the plurality of positioning members.

[0021] In the above embodiment, the sensor enables the transfer drive member to drive the clamping mechanism to move toward the multiple positioning members when the multiple positioning members complete the distance change, so as to clamp the workpiece through the first clamping member and the second clamping member, complete the secondary positioning of the workpiece, and improve the accuracy of the distance change mechanism in positioning the workpiece.

[0022] The present application also proposes a material transfer device, which includes a loading mechanism, a pitch-changing mechanism and a unloading mechanism. The loading mechanism is configured to transfer multiple workpieces to the pitch-changing mechanism, the pitch-changing mechanism is configured to change the spacing of multiple workpieces, and the unloading mechanism is configured to unload multiple workpieces after the pitch-changing mechanism is loaded. The pitch-changing mechanism includes a support, a pitch-changing driving member and multiple positioning members. The pitch-changing driving member is arranged on the support; at least one of the multiple positioning members is fixedly connected to the support, and the other positioning members are respectively slidably arranged on the support within a set stroke; each positioning member is provided with an adsorption channel and at least one adsorption port connected to the adsorption channel, the adsorption channel is configured to connect to an air suction device, and the adsorption port is configured to adsorb the workpiece; the pitch-changing driving member is configured to drive at least one positioning member slidably connected to the support to move, so as to drive the other positioning members slidably connected to the support to move.

[0023] The material moving device drives multiple positioning members to move through the variable pitch driving member, and the positioning member adsorbs the workpiece. The positioning member is located on one side of the workpiece to adsorb and fix the workpiece, and there is no need to extend into both sides of the workpiece to clamp the workpiece, which is conducive to adapting to the situation where multiple workpieces have a small spacing when they are in the aggregated state. In addition, the adsorption channel and adsorption port are directly opened on the positioning member, and there is no need to add a structure for grabbing the workpiece on the positioning member, which is conducive to simplifying the structure of the variable pitch mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a material transfer device provided in an embodiment of the present application.

[0025] Figure 2 for Figure 1 Schematic diagram of the distance changing mechanism in the material transfer device shown.

[0026] Figure 3 for Figure 2 Schematic diagram of the pitch changing mechanism removing the clamping mechanism shown.

[0027] Figure 4 for Figure 3 The schematic diagram of the disassembled pitch changing mechanism shown is shown with the support member removed.

[0028] Figure 5 for Figure 2 A schematic cross-sectional view of a positioning member in the pitch changing mechanism shown.

[0029] Figure 6 for Figure 2 Schematic diagram of the clamping mechanism in the variable pitch mechanism shown.

[0030] Main component symbols

[0031] Material transfer device 200

[0032] Feeding mechanism 201

[0033] Feeding mechanism 203

[0034] Sensor 205

[0035] Pitch change mechanism 100

[0036] Support member 10

[0037] Support body 11

[0038] Guide rod 13

[0039] Variable pitch drive 20

[0040] Rotating drive member 21

[0041] Gear 23

[0042] Rack 25

[0043] Positioning piece 30

[0044] Positioning subject 31

[0045] Support surface 311

[0046] Avoidance slot 313

[0047] Suction cup 33

[0048] Adsorption channel 301

[0049] Adsorption port 303

[0050] Slide hole 305

[0051] Connector 40

[0052] Stopper 41

[0053] Connecting part 43

[0054] Clamping mechanism 50

[0055] The first clamping member 51

[0056] The second clamping member 52

[0057] Clamping drive 53

[0058] First support plate 54

[0059] Second support plate 55

[0060] Bracket 56

[0061] Transfer drive 60

[0062] Workpiece 300

[0063] First direction X

[0064] Second direction Y

[0065] The third direction Z

[0066] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0067] In order to further illustrate the technical means and effects adopted by the present application to achieve the intended application purpose, the following is combined with the drawings and implementation methods. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0069] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0070] Please also see Figure 1 and Figure 2 One embodiment of the present application proposes a distance-changing mechanism 100 for changing the distance between a plurality of workpieces 300 and positioning the workpieces 300 so as to facilitate the workpieces 300 to enter the next process. One embodiment of the present application also proposes a material transfer device 200 including the distance-changing mechanism 100. The material transfer device 200 also includes a loading mechanism 201 and a unloading mechanism 203. The loading mechanism 201 is used to transfer the gathered plurality of workpieces 300 to the distance-changing mechanism 100. After the distance between the plurality of workpieces 300 is changed by the distance-changing mechanism 100, the unloading mechanism 203 transfers them to the equipment (not shown) of the next process.

[0071] See also Figure 2 and Figure 3The pitch-changing mechanism 100 includes a support member 10, a pitch-changing driving member 20, a plurality of positioning members 30 and a clamping mechanism 50. The pitch-changing driving member 20 is disposed on the support member 10. Each positioning member 30 is used to position at least one workpiece 300. One of the plurality of positioning members 30 is fixedly connected to the support member 10, and the remaining positioning members 30 are respectively slidably disposed on the support member 10 within a set stroke. The sliding positioning member 30 moves relative to the plurality of fixed positioning members 30, thereby driving the workpieces 300 on the two positioning members 30 to move relative to each other, so as to change the spacing between the workpieces 300. Each positioning member 30 is configured to adsorb the workpiece 300 to achieve preliminary positioning of the workpiece 300. The clamping mechanism 50 is configured to clamp the workpiece 300 on the positioning member 30 from the opposite sides of each positioning member 30 after the plurality of positioning members 30 drive the workpiece 300 to change the pitch, so as to achieve precise positioning of the workpiece 300.

[0072] Each positioning member 30 is provided with an adsorption channel 301 and at least one adsorption port 303 connected to the adsorption channel 301. The adsorption channel 301 is configured to be connected to an air suction device (not shown). The adsorption port 303 is used to adsorb the workpiece 300.

[0073] In one embodiment, each positioning member 30 is provided with two suction ports 303 to enhance the suction force, but the invention is not limited thereto. It is understood that in other embodiments, each positioning member 30 may also be provided with one suction port 303 or multiple suction ports 303 of other numbers such as three or four.

[0074] The pitch changing mechanism 100 drives the multiple positioning members 30 to move through the pitch changing driving member 20, and the positioning members 30 adsorb the workpiece 300 to achieve preliminary positioning of the workpiece 300 during the pitch changing process; after the pitch changing of the multiple workpieces 300 is completed, the workpiece 300 on the positioning member 30 is clamped by the clamping mechanism 50 to achieve precise positioning of the workpiece 300, which is beneficial to the positioning accuracy of the workpiece 300 entering the next process.

[0075] The positioning member 30 is located on one side of the workpiece 300 to achieve adsorption and fixation of the workpiece 300 without extending into both sides of the workpiece 300 to clamp the workpiece 300, thereby facilitating adaptation to the situation where multiple workpieces 300 have a small distance between them in the aggregated state.

[0076] The distance changing mechanism 100 can automatically change the distance of a plurality of workpieces 300 , thereby reducing the difficulty of grasping the workpieces 300 and improving efficiency.

[0077] In addition, the adsorption channel 301 and the adsorption port 303 are directly provided on the positioning member 30 , and there is no need to add a structure for grabbing the workpiece 300 on the positioning member 30 , which helps to simplify the structure of the variable pitch mechanism 100 .

[0078] For the convenience of subsequent description, the first direction X is defined as parallel to the sliding direction of the positioning member 30, the second direction Y is defined as perpendicular to the sliding direction of the positioning member 30, and the third direction Z is defined as a vertical direction. The first direction X, the second direction Y and the third direction Z are perpendicular to each other, but are not limited to this.

[0079] See also Figure 3 and Figure 5 In one embodiment, the positioning member 30 includes a positioning body 31 and a plurality of suction cups 33. An adsorption channel 301 is provided inside the positioning body 31, and the adsorption channel 301 is connected to the suction device. The number of the suction cups 33 is two, but not limited thereto. The two suction cups 33 are connected to the positioning body 31 and are connected to the adsorption channel 301. Each suction cup 33 is configured to adsorb the workpiece 300 along a third direction Z. It can be understood that in other embodiments, the plurality of positioning members 30 may also be arranged along the third direction Z, and the suction cups 33 adsorb the workpiece 300 along the first direction X or the second direction Y.

[0080] In one embodiment, the positioning body 31 is substantially a rectangular block structure, and the adsorption channel 301 passes through two adjacent sides of the positioning body 31 , but is not limited thereto.

[0081] The positioning body 31 is provided with a plurality of supporting surfaces 311. The plurality of supporting surfaces 311 are configured to support the workpiece 300 along the third direction Z to improve the accuracy of the positioning member 30 in positioning the workpiece 300. The supporting surfaces 311 and the suction cups 33 are alternately arranged to improve the uniformity of the arrangement of the suction cups 33 along the positioning body 31 to optimize the distribution of the force of the plurality of suction cups 33 adsorbing the workpiece 300.

[0082] It can be understood that in other embodiments, the number of the supporting surface 311 and / or the suction cup 33 can also be one or another number.

[0083] In one embodiment, the number of the positioning members 30 is ten, but not limited thereto. The ten positioning members 30 are sequentially arranged along the sliding direction of the positioning members 30. Along the first direction X, the positioning members 30 ranked six are fixedly connected to the support member 10; the positioning members 30 ranked one to five and seven to ten are respectively slidably arranged on the support member 10, and move toward or away from the positioning member 30 ranked six, respectively, so as to realize the gathering or dispersion of the plurality of positioning members 30.

[0084] It can be understood that in other embodiments, a positioning member 30 located at an end of the plurality of positioning members 30 is fixedly connected to the support member 10 , and the remaining positioning members 30 are slidably connected to the support member 10 .

[0085] See also Figure 3 and Figure 4In one embodiment, the pitch-changing mechanism 100 further includes a plurality of connecting members 40. The pitch-changing driving member 20 includes a rotating driving member 21, a gear 23 and two racks 25. The two racks 25 are disposed on both sides of the gear 23 and mesh with the gear 23 respectively. The rotating driving member 21 is configured to drive the gear 23 to rotate so as to drive the two racks 25 to move in opposite directions. The two positioning members 30 located at both ends of the plurality of positioning members 30 are connected to the two racks 25 in a one-to-one correspondence. Each two adjacent positioning members 30 are realized to slide relative to each other within a set stroke through a connecting member 40. The two racks 25 respectively drive the corresponding positioning members 30 to move toward the positioning members 30 fixed to the support member 10, and the plurality of positioning members 30 located on both sides of the support member 10 are respectively moved in sequence by the action of the connecting member 40 until the positioning members 30 located at both ends move into place, thereby realizing the pitch change between the plurality of positioning members 30, and then realizing the pitch change between the workpieces 300 positioned at the positioning members 30.

[0086] The gear 23 drives the two racks 25 to move in opposite directions, so that the multiple positioning members 30 are divided into two groups moving in opposite directions. The driving structure of a rotating driving member 21 is used to reduce the movement stroke of the positioning members 30, so as to adapt to the large span distance change between multiple workpieces 300.

[0087] In addition, the gear 23 and the rack 25 cooperate with each other with high precision, which is beneficial to the pitch change precision of the plurality of positioning members 30 , thereby improving the positioning precision of the workpiece 300 .

[0088] In one embodiment, the connecting member 40 is provided with a stopper 41 and a connecting portion 43. The connecting portion 43 is fixedly connected to one of the two adjacent positioning members 30. The stopper 41 stops at the other of the two adjacent positioning members 30 on the side away from the connecting portion 43. The two adjacent positioning members 30 are relatively far away from each other until one of the positioning members 30 is stopped by the stopper 41, and the maximum distance between the two positioning members 30 is reached; the two positioning members 30 are relatively close to each other until the two positioning members 30 abut against each other, and the minimum distance between the two positioning members 30 is reached; thereby, the two adjacent positioning members 30 are realized to slide relative to each other within the set stroke.

[0089] In one embodiment, one of the two adjacent positioning members 30 is provided with an avoidance groove 313. The avoidance groove 313 is configured to penetrate the positioning member 30 along the sliding direction of the positioning member 30, and is used to avoid the connecting member 40 connected between the two adjacent positioning members 30, so as to facilitate the layout of the connecting member 40 between the two positioning members 30, thereby reducing the space occupied outside the positioning member 30, and facilitating the size of the variable pitch mechanism 100.

[0090] In one embodiment, the support member 10 includes a support body 11 and a guide rod 13. The guide rod 13 is fixed to the support body 11. The positioning member 30 is provided with a sliding hole 305. Figure 5 The guide rod 13 is sequentially inserted into the slide holes 305 of the plurality of positioning members 30. The guide rod 13 provides movement guidance and support for the plurality of positioning members 30, so that the plurality of positioning members 30 can move relatively smoothly.

[0091] In one embodiment, please refer to Figure 2 and Figure 6 The clamping mechanism 50 includes a plurality of first clamping members 51, a plurality of second clamping members 52, a clamping driving member 53, a first support plate 54 and a second support plate 55. The plurality of first clamping members 51 are sequentially arranged on the first support plate 54, and the plurality of second clamping members 52 are sequentially arranged on the second support plate 55.

[0092] In one embodiment, the clamping drive member 53 is a pneumatic clamping claw cylinder, but is not limited thereto. For example, in another embodiment, the clamping drive member 53 is an electric cylinder structure.

[0093] The first support plate 54 and the second support plate 55 are respectively connected to the clamping driving member 53. In one embodiment, the number of the clamping driving members 53 is two, and both ends of the first support plate 54 are respectively connected to the two clamping driving members 53, and both ends of the second support plate 55 are respectively connected to the two clamping driving members 53, so as to improve the stability of the first support plate 54 supporting the first clamping member 51 and the stability of the second support plate 55 supporting the second clamping member 52.

[0094] The clamping driving member 53 is configured to drive the first support plate 54 and the second support plate 55 to move in opposite directions along the first direction X, so as to drive each first clamping member 51 and a corresponding second clamping member 52 to move in opposite directions to clamp or release the corresponding workpiece 300 .

[0095] The first support plate 54 and the second support plate 55 drive the multiple first clamping members 51 and the multiple second clamping members 52 to move, so that when the multiple positioning members 30 drive the multiple workpieces 300 to move to change the distance and preliminarily position the workpieces 300, the first clamping members 51 and the second clamping members 52 are clamped on the opposite sides of the workpieces 300 to achieve secondary positioning of the multiple workpieces 300, so as to further improve the positioning accuracy of the workpieces 300.

[0096] It can be understood that in other embodiments, the clamping mechanism 50 can also be omitted.

[0097] In one embodiment, the variable distance mechanism 100 further includes a transfer drive 60. The clamping mechanism 50 is connected to the transfer drive 60. The transfer drive 60 is configured to drive the first clamping member 51 to move between two adjacent positioning members 30, and the second clamping member 52 to move between two other adjacent positioning members 30, or to move the first clamping member 51 and the second clamping member 52 out from between a plurality of positioning members 30.

[0098] In one embodiment, there are two transfer driving members 60, and the pitch changing mechanism 100 further includes a bracket 56. Both ends of the bracket 56 are connected to the two transfer driving members 60. The clamping driving member 53 of the clamping mechanism 50 is installed on the bracket 56, so that the transfer driving member 60 drives the clamping driving member 53 and drives the first support plate 54 and the second support plate 55 to move.

[0099] In one embodiment, the first support plate 54 and the second support plate 55 move along the first direction X under the drive of the clamping driver 53 , and the first support plate 54 and the second support plate 55 move along the second direction Y under the drive of the transfer driver 60 .

[0100] The multiple positioning members 30 drive the multiple workpieces 300 to disperse, and the transfer drive member 60 drives the first clamping member 51 on the first support plate 54 and the second clamping member 52 on the second support plate 55 to move between the multiple positioning members 30, so that the first clamping member 51 and the corresponding second clamping member 52 are located on the opposite sides of the workpiece 300, so as to adapt to the situation where the distance between the multiple workpieces 300 is smaller before the distance is changed.

[0101] In addition, the transfer drive 60 drives the first support plate 54 and the second support plate 55 and drives the first clamping member 51 and the second clamping member 52 to move out from between the multiple positioning members 30, so as to facilitate the placement of the workpiece 300 on the positioning member 30, thereby reducing the risk of interference with the workpiece 300 or the loading mechanism 201 used to load the workpiece 300.

[0102] It is understandable that in other embodiments, the transfer driving member 60 can also drive the clamping mechanism 50 to move along the third direction Z, so that the first clamping member 51 and the second clamping member 52 are moved between the plurality of positioning members 30 .

[0103] In one embodiment, the pitch changing mechanism 100 further includes a sensor 205. The sensor 205 is configured to sense the positions of the plurality of positioning members 30 to provide feedback on the pitch changing completion of the plurality of positioning members 30. The transfer drive member 60 can drive the clamping mechanism 50 to move toward the plurality of positioning members 30 when the pitch changing of the plurality of positioning members 30 is completed, so as to clamp the workpiece 300 through the first clamping member 51 and the second clamping member 52, thereby completing the secondary positioning of the workpiece 300 and improving the accuracy of the pitch changing mechanism 100 in positioning the workpiece 300.

[0104] The above-mentioned pitch-changing mechanism 100 drives the multiple positioning members 30 to move through the pitch-changing driving member 20, and the positioning members 30 adsorb the workpiece 300. The positioning members 30 are located on one side of the workpiece 300 to adsorb and fix the workpiece 300, without extending into both sides of the workpiece 300 to clamp the workpiece 300, thereby facilitating the adaptation of the situation where multiple workpieces 300 have a small spacing when in the aggregated state. In addition, the adsorption channel 301 and the adsorption port 303 are directly provided on the positioning member 30, and there is no need to add a structure for grabbing the workpiece 300 on the positioning member 30, which is conducive to simplifying the structure of the pitch-changing mechanism 100.

[0105] The transmission matching accuracy of the gear 23 and the rack 25 is relatively high, which is beneficial to improving the repeat positioning accuracy of multiple positioning members 30, and further beneficial to improving the position accuracy of the distance changing mechanism 100 before and after repeated distance changing of multiple workpieces 300, so as to facilitate the transmission of workpieces 300 between the loading mechanism 201 and the unloading mechanism 203 and the distance changing mechanism 100.

[0106] The positive and negative rotations of the gear 23 drive the two racks 25 and the plurality of positioning members 30 to gather in the middle or disperse to both sides, which is conducive to adapting to the variable pitch of the plurality of workpieces 300 with a large span.

[0107] The stopper 41 of the connecting member 40 stops the positioning body 31 , so that the multiple positioning members 30 are physically contacted and positioned through the connecting member 40 , further improving the positioning accuracy of the multiple workpieces 300 on the multiple positioning members 30 before and after the distance change.

[0108] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A pitch-changing mechanism, characterized in that: include: Supports; A plurality of positioning members, each of which is configured to carry and absorb a workpiece; At least one of the plurality of positioning members is fixedly connected to the support member, and the remaining positioning members are slidably disposed on the support member within a set stroke. A plurality of connecting members, wherein each two adjacent positioning members are connected in a relative sliding manner via one of the connecting members; a variable pitch driving member, arranged on the support member; the variable pitch driving member is configured to drive at least one of the positioning members slidably connected to the support member to move, so as to drive the remaining positioning members slidably connected to the support member to move through a plurality of the connecting members; and The clamping mechanism is configured to clamp the workpieces on the positioning members from opposite sides of each positioning member after the positioning members drive the workpieces to change their distances.

2. The pitch-changing mechanism according to claim 1, characterized in that: The positioning member comprises a positioning body and at least one suction cup, the positioning body is provided with an adsorption channel, and the adsorption channel is configured to communicate with an air suction device; The suction cup is connected to the positioning body; a suction port is provided on a side of the suction cup away from the positioning body, the suction port is connected to the suction channel and is configured to suck the workpiece; The positioning body is provided with a plurality of supporting surfaces, and the supporting surfaces are configured to support and position the workpiece, and the supporting surfaces and the suction cups are arranged alternately.

3. The pitch-changing mechanism according to claim 1, characterized in that: The clamping mechanism comprises a plurality of first clamping members, a plurality of second clamping members, a clamping driving member, and a first supporting plate and a second supporting plate connected to the clamping driving member; A plurality of the first clamping members are sequentially arranged on the first supporting plate, and a plurality of the second clamping members are sequentially arranged on the second supporting plate; The clamping driving member is configured to drive the first support plate and the second support plate to move in opposite directions, so as to drive each of the first clamping members and a corresponding one of the second clamping members to move in opposite directions, so as to clamp or release the corresponding workpiece.

4. The pitch-changing mechanism according to claim 3, characterized in that: The variable pitch mechanism further comprises a transfer driving member, and the clamping mechanism is connected to the transfer driving member; The transfer drive is configured to drive the first clamping member to move between two adjacent positioning members, and the second clamping member to move between another two adjacent positioning members, or to move the first clamping member and the second clamping member out from between a plurality of positioning members.

5. The pitch-changing mechanism according to any one of claims 1 to 4, characterized in that: The variable pitch drive member includes a rotating drive member, a gear and two racks; The two racks are disposed on both sides of the gear and mesh with the gears respectively; the rotation driving member is configured to drive the gear to rotate so as to drive the two racks to move in opposite directions; the two positioning members located at both ends of the plurality of positioning members are connected to the two racks in a one-to-one correspondence; a certain positioning member located in the middle of the plurality of positioning members is fixedly connected to the support member; Each two adjacent positioning members can slide relative to each other within a set stroke through one connecting member.

6. The pitch-changing mechanism according to claim 5, characterized in that: The connecting member is provided with a stopper and a connecting portion, wherein the connecting portion is fixedly connected to one of the two adjacent positioning members, and the stopper stops at a side of the other of the two adjacent positioning members away from the connecting portion.

7. The pitch-changing mechanism according to claim 5, characterized in that: One of the two adjacent positioning members is provided with an avoidance groove, and the avoidance groove is configured to penetrate the positioning member along the sliding direction of the positioning member and is used to avoid the connecting member connected between the two adjacent positioning members.

8. The pitch-changing mechanism according to claim 1, characterized in that: The support member comprises a support body and a guide rod, the guide rod is fixed to the support body, the positioning member is provided with a sliding hole, and the guide rod is sequentially passed through the sliding holes of the plurality of positioning members.

9. The pitch-changing mechanism according to claim 1, characterized in that: The pitch changing mechanism further includes a sensor, which is configured to sense positions of the plurality of positioning members to provide feedback on pitch changing completion status of the plurality of positioning members.

10. A material transfer device, characterized in that: It comprises a loading mechanism, an unloading mechanism and a distance-changing mechanism as claimed in any one of claims 1 to 9, wherein the loading mechanism is configured to transfer a plurality of workpieces to the distance-changing mechanism, the distance-changing mechanism is configured to change the spacing between the plurality of workpieces, and the unloading mechanism is configured to unload the plurality of workpieces after the distance is changed on the distance-changing mechanism.

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