A multi-station variable distance mechanism

Abstract

The present invention discloses a multi-station pitch-changing mechanism, comprising a fixed seat, a mounting groove is provided on one side of the fixed seat, and multiple limit steps are provided on the upper and lower sides of the mounting groove, and a pair of parallel guide rods, a pitch-changing shaft and a plurality of movable blocks are provided in the mounting groove; the fixed seat is provided with a slide rail mechanism above the mounting groove, and the slide rail mechanism comprises a fixed base plate, a pair of parallel guide rails are provided on the fixed base plate, and a plurality of sliders are slidably connected to the guide rails, and the plurality of sliders are in a one-to-one correspondence with the plurality of movable blocks, and each of the sliders is connected to an air valve block, and the air valve block is connected to a vertical ventilation hard pipe, and the ventilation hard pipe extends through and extends to the bottom of the corresponding suction nozzle mounting part, and is connected to a second suction nozzle; the present invention can realize multiple products with regular spacing, and perform position change of a specified distance, which is convenient for batch grabbing of materials and greatly improves the production capacity of the equipment.

Description

Technical Field

[0001] The invention relates to the field of automated assembly equipment, and in particular to a multi-station variable distance mechanism. Background Art

[0002] In an automated production line, the spacing between parts produced at the previous process station is different from the spacing between parts required at the next process station. A variable distance mechanism is needed to achieve variable distance grasping and docking between the upper and lower stations.

[0003] Some of the existing variable pitch mechanisms are only capable of variable pitch for large sizes and large spacings, while others are restricted by the limitations of the variable pitch structure and are difficult to adapt to batch changes, thus affecting the production capacity of the equipment.

[0004] The Chinese invention patent with application number CN201721500047.X disclosed a multi-station equidistant pitch variable mechanism on August 3, 2018, including a pitch variable mechanism, which is installed on the Z-axis of the SCARA robot. The pitch variable mechanism includes one or more pitch variable nozzle mounting plates, oil-free bushings, pitch variable guide shafts, pitch variable shafts, guide shaft fixing plates, cylinders, mounting seats, pitch variable limit plates and pitch variable main boards. The mounting seats are arranged on one side of the entire mechanism, and a suction cup is arranged at the bottom of each pitch variable nozzle mounting plate. The cylinder is arranged on one side of the pitch variable shaft, and one or more pitch variable limit plates are installed on the pitch variable shaft. The bottoms of the pitch variable limit plates are connected to the pitch variable nozzle mounting plates; the multi-station equidistant pitch variable mechanism realizes stamping (or die cutting) and packaging automated online production, reduces the turnover links of products in the production process, reduces the investment in equipment and production personnel, avoids abnormalities caused by excessively long production processes, and simplifies product processes.

[0005] The drawback of the above solution is that the functional structure is relatively simple and is only suitable for dedicated production lines and batch grabbing of single products. It is difficult to adapt to products with different structural sizes on the production line, and there is still room for improvement in product versatility. Summary of the invention

[0006] The purpose of the present invention is to provide a multi-station distance-changing mechanism to address the problems existing in the prior art, which can realize the position change of multiple products with regular spacing by a specified distance, facilitate batch grabbing of materials, and greatly improve the production capacity of the equipment.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A multi-station pitch-changing mechanism, comprising a fixed seat, a mounting groove is provided on one side of the fixed seat, and multiple limit steps are provided on the upper and lower sides of the mounting groove, a pair of parallel guide rods, a pitch-changing shaft and a plurality of movable blocks are provided in the mounting groove, one end of the guide rod is fixed to the side wall of the mounting groove, and the plurality of movable blocks each comprise a nozzle mounting portion and a sliding limit portion, the nozzle mounting portion extends out of the mounting groove and is connected with a first nozzle, the sliding limit portion is slidably connected with two guide rods, the pitch-changing shaft passes through the sliding limit portions of all the movable blocks and one end is connected with a pitch-changing driving device; the fixed seat is provided with a slide rail mechanism above the mounting groove, the slide rail mechanism comprises a fixed base plate, a pair of parallel guide rails are provided on the fixed base plate, a plurality of sliders are slidably connected to the guide rails, and the plurality of sliders are in a one-to-one correspondence with the plurality of movable blocks, each of the sliders is connected to an air valve block, the air valve block is connected to a vertical ventilation hard pipe, the ventilation hard pipe passes through and extends to the bottom of the corresponding nozzle mounting portion, and is connected to a second nozzle.

[0009] This solution is applied in the field of 3C product automated assembly production lines. It is suitable for batch grabbing and transferring small parts products during the production process, with high efficiency and good versatility.

[0010] In this solution, the movable block is guided by the guide rod and driven by the pitch-changing shaft to move linearly in the installation groove. The movable block drives the suction nozzle to move to achieve pitch change.

[0011] Specifically, several movable blocks have two types of variable distance forms. One is that all movable blocks are close together to the right, and at this time, there is a minimum distance between several suction nozzles; the other is that all movable blocks are driven by the variable distance shaft and move to the left until they are limited by the corresponding steps of the multi-level limiting steps. At this time, the distance between all movable blocks is the maximum, and the distance between several suction nozzles is also the maximum.

[0012] The improvement of this solution is that the suction nozzle includes a first suction nozzle and a second suction nozzle, wherein the first suction nozzle is installed at the end of the movable block, and the second suction nozzle is installed in the middle of the movable block. The first suction nozzle and the second suction nozzle have different air inlet channels, and the suction can be controlled separately, thereby improving the versatility of the product;

[0013] A slide rail mechanism is provided, which includes a guide slide rail, a slider, an air valve block, and a ventilation tube. The ventilation tube runs through the movable block. When the movable block is driven to move by the pitch-changing shaft, the ventilation tube is also driven to move linearly. The upper end of the ventilation tube drives the slider to move on the guide slide rail, which is convenient for visually observing the pitch-changing form of the movable block and detecting whether the pitch-changing is in place.

[0014] The slide block is connected to the guide rail, and the air valve block is connected to the ventilation tube that passes through the movable block, so that the ventilation tube has the function of upper and lower limit on the movable block, so as to prevent the movable block from loosening or slightly rotating along the variable pitch axis, thereby affecting the accuracy of grabbing material products.

[0015] Furthermore, the sliding limit parts of several movable blocks are all provided with coaxial variable pitch through holes, and the apertures of the variable pitch through holes of several movable blocks increase from left to right; the variable pitch shaft is provided with a stepped diameter-changing structure, and the outer diameter of the variable pitch shaft increases gradually from left to right in a stepped manner. In the process of the variable pitch shaft moving to the left, each step of the stepped diameter-changing structure of the variable pitch shaft abuts against the variable pitch through hole of a movable block until the movable block abuts against the multi-stage limit steps on the upper and lower sides of the mounting groove, thereby increasing the spacing between the movable blocks.

[0016] Furthermore, the movable block at the far left is fixedly connected to the left end of the pitch-changing shaft, and the movable block at the far right is fixedly connected to the right end of the guide rod. When the pitch-changing shaft moves to the left, the movable block at the far left is also driven to squeeze other movable blocks to the left until all movable blocks are squeezed together to achieve the minimum spacing of the pitch change and realize rapid pitch change.

[0017] Furthermore, the number of the movable blocks is 5 to 12, the number of the multi-stage limiting steps of the installation slot is greater than or equal to the number of the movable blocks, and the length of each stage of the multi-stage limiting steps is the same. By making the length of each stage of the multi-stage limiting steps the same, the movable blocks have a uniform spacing distance when the variable distance is the maximum, which is convenient for batch material removal.

[0018] Furthermore, the variable pitch drive device includes a slide cylinder, a drive plate, and a push rod. The slide cylinder is fixedly installed on a side opposite to the mounting groove. The movable end of the slide cylinder is connected to the drive plate, and the drive plate is connected to the push rod. A notch is provided on one side of the mounting groove, and the push rod passes through the notch and is connected to the variable pitch shaft.

[0019] Furthermore, the sliding limit parts of the plurality of movable blocks are each provided with two guide through holes cooperating with the guide rods, and the two guide rods respectively penetrate the two through holes of the sliding limit part.

[0020] Furthermore, both upper and lower sides of the mounting slot are provided with variable distance limit modules, the multi-stage limit steps are provided on the upper side or the lower side of the variable distance limit module, and the variable distance limit module and the fixing seat are detachably installed. By providing a detachable variable distance limit module, variable distances of different spacings can be achieved, thereby increasing versatility.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. It can realize multiple products with regular spacing and change the position of the specified distance, which is convenient for batch grabbing of materials and greatly improves the production capacity of the equipment;

[0023] 2. The suction nozzle includes a first suction nozzle and a second suction nozzle, wherein the first suction nozzle is installed at the end of the movable block, and the second suction nozzle is installed in the middle of the movable block. The first suction nozzle and the second suction nozzle have different air inlet channels, and the suction can be controlled separately, thereby improving the versatility of the product;

[0024] 3. A slide rail mechanism is provided, which includes a guide slide rail, a slider, a valve block, and a ventilation tube. The ventilation tube runs through the movable block. When the movable block is driven to move by the pitch-changing shaft, the ventilation tube is also driven to move linearly. The upper end of the ventilation tube drives the slider to move on the guide slide rail, which is convenient for visually observing the pitch-changing form of the movable block and detecting whether the pitch-changing is in place.

[0025] 4. Connect the slider with the guide rail, and connect the air valve block with the ventilation tube that penetrates the movable block, so that the ventilation tube has the function of upper and lower limit on the movable block, to prevent the movable block from loosening or slightly rotating along the pitch axis, thereby affecting the accuracy of grabbing material products;

[0026] 5. By changing the connection position between the slider and the air valve block and adjusting the length of the ventilation tube, the height of the second suction nozzle can be adjusted to adapt to the grabbing of products of different sizes and increase the overall versatility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of a multi-station variable distance mechanism of the present invention;

[0028] Figure 2 This is a three-dimensional diagram of the present invention after the slide rail mechanism is disassembled;

[0029] Figure 3 For the present invention Figure 2 Rear side perspective stereogram in;

[0030] Figure 4 It is a disassembled three-dimensional diagram of the fixing seat of the present invention;

[0031] Figure 5 It is a disassembled stereoscopic diagram of the variable pitch shaft of the present invention;

[0032] Figure 6 It is a disassembled stereogram of the movable block of the present invention;

[0033] In the figure: 1. fixed seat; 2. mounting groove; 3. multi-stage limit step; 4. guide rod; 5. variable pitch shaft; 6. movable block; 601. nozzle mounting part; 602. sliding limit part; 7. first nozzle; 8. fixed base plate; 9. guide rail; 10. slider; 11. air valve block; 12. ventilation hard pipe; 13. second nozzle; 14. slide cylinder; 15. drive plate; 16. push rod; 17. variable pitch limit module. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "top", "bottom", "inside", "outside", "horizontal", "vertical", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] like Figures 1 to 6 As shown, a multi-station pitch-changing mechanism comprises a fixed seat 1, a mounting groove is provided on one side of the fixed seat 1, and multiple limiting steps 3 are provided on the upper and lower sides of the mounting groove 2. A pair of parallel guide rods 4, a pitch-changing shaft 5 and a plurality of movable blocks 6 are provided in the mounting groove 2. One end of the guide rod 4 is fixed to the side wall of the mounting groove 2. The plurality of movable blocks 6 each comprise a nozzle mounting portion 601 and a sliding limiting portion 602. The nozzle mounting portion 601 extends out of the mounting groove 2 and is connected to a first nozzle 7. The sliding limiting portion 602 is slidably connected to the two guide rods 4. The pitch-changing shaft 5 passes through all the The movable block 6 has a sliding limit portion 602 and one end connected to a variable pitch drive device; the fixed seat 1 is provided with a slide rail mechanism above the mounting groove 2, and the slide rail mechanism includes a fixed base plate 8, and the fixed base plate 8 is provided with a pair of parallel guide rails 9, and a plurality of sliders 10 are slidably connected to the guide rails 9, and a plurality of the sliders 10 are in a one-to-one correspondence with a plurality of the movable blocks 6, and each of the sliders 10 is connected to an air valve block 11, and the air valve block 11 is connected to a vertical ventilation hard pipe 12, and the ventilation hard pipe 12 extends through and extends to the bottom of the corresponding suction nozzle mounting portion 601, and is connected to a second suction nozzle 13.

[0037] This solution is applied in the field of 3C product automated assembly production lines. It is suitable for batch grabbing and transferring small parts products during the production process, with high efficiency and good versatility.

[0038] In this solution, the movable block 6 is guided by the guide rod 4 and driven by the pitch-changing shaft 5 to move linearly in the mounting groove 2. The movable block 6 drives the suction nozzle to move to achieve pitch change.

[0039] Specifically, several movable blocks 6 have two variable distance forms. One is that all movable blocks 6 are close together to the right, and at this time, there is a minimum distance between several suction nozzles; the other is that all movable blocks 6 are driven by the variable distance shaft 5 and move to the left until they are limited by the corresponding steps of the multi-level limiting steps 3. At this time, the distance between all movable blocks 6 is the maximum, and the distance between several suction nozzles is also the maximum.

[0040] The improvement of this solution is that the suction nozzle includes a first suction nozzle 7 and a second suction nozzle 13, wherein the first suction nozzle 7 is installed at the end of the movable block 6, and the second suction nozzle 13 is installed in the middle of the movable block 6. The first suction nozzle 7 and the second suction nozzle 13 have different air inlet channels, and the suction can be controlled separately, thereby improving the versatility of the product;

[0041] A slide rail mechanism is provided, which includes a guide slide rail 9, a slider 10, an air valve block 11, and a ventilation tube 12. The ventilation tube 12 runs through the movable block 6. When the movable block 6 is driven to move by the pitch-changing shaft 5, the ventilation tube 12 is also driven to move linearly. The upper end of the ventilation tube 12 drives the slider 10 to move on the guide slide rail 9, which is convenient for visually observing the pitch-changing form of the movable block 6 and detecting whether the pitch-changing is in place.

[0042] The slide block 10 is connected to the guide rail 9, and the air valve block 11 is connected to the ventilation tube 12 which passes through the movable block 6, so that the ventilation tube 12 has the function of upper and lower limit on the movable block 6 to prevent the movable block 6 from loosening or slightly rotating along the variable pitch shaft 5, thereby affecting the accuracy of grabbing material products.

[0043] Furthermore, the sliding limit parts 602 of the plurality of movable blocks 6 are all provided with coaxial variable pitch through holes, and the apertures of the variable pitch through holes of the plurality of movable blocks 6 increase in sequence from left to right; the variable pitch shaft 5 is provided with a stepped diameter-changing structure, and the outer diameter of the variable pitch shaft 5 increases gradually in a stepped manner from left to right. In the process of the variable pitch shaft 5 moving to the left, each step of the stepped diameter-changing structure of the variable pitch shaft 5 abuts against a variable pitch through hole of the movable block 6 until the movable block 6 abuts against the multi-stage limit steps 3 on the upper and lower sides of the mounting groove 2, thereby increasing the spacing between the movable blocks 6.

[0044] Furthermore, the movable block 6 at the far left is fixedly connected to the left end of the pitch-changing shaft 5, and the movable block 6 at the far right is fixedly connected to the right end of the guide rod 4. When the pitch-changing shaft 5 moves to the left, the movable block 6 at the far left is also driven to squeeze other movable blocks 6 to the left until all movable blocks 6 are squeezed together to achieve the minimum spacing of the pitch change and realize rapid pitch change.

[0045] Furthermore, the number of the movable blocks 6 is 5 to 12, the number of the multi-stage limiting steps 3 of the mounting slot 2 is greater than or equal to the number of the movable blocks 6, and the length of each step of the multi-stage limiting steps 3 is the same. By making the length of each step of the multi-stage limiting steps 3 the same, the movable blocks 6 have a uniform spacing when the variable distance is the maximum, which is convenient for batch material removal.

[0046] Furthermore, the variable pitch drive device includes a slide cylinder 14, a drive plate 15, and a push rod 16. The slide cylinder 14 is fixedly installed on the side opposite to the mounting groove 2. The movable end of the slide cylinder 14 is connected to the drive plate 15, and the drive plate 15 is connected to the push rod 16. A notch is provided on one side of the mounting groove 2, and the push rod 16 passes through the notch and is connected to the variable pitch shaft 5.

[0047] Furthermore, the sliding limit parts 602 of the plurality of movable blocks 6 are each provided with two guide through holes cooperating with the guide rod 4 , and the two guide rods 4 respectively penetrate the two through holes of the sliding limit part 602 .

[0048] Furthermore, both upper and lower sides of the mounting groove 2 are provided with variable distance limiting modules 17, the multi-stage limiting step 3 is provided on the upper side or the lower side of the variable distance limiting module 17, and the variable distance limiting module 17 is detachably installed with the fixing seat 1. By providing a detachable variable distance limiting module 17, variable distances of different spacings can be achieved, thereby increasing versatility.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-station variable distance mechanism, characterized in that: The cam is an axially parallel pair of movable blocks, and each movable block is provided with a pair of parallel guide rods, a pitch-changing shaft and a plurality of movable blocks. One end of the guide rod is fixed to the side wall of the mounting groove, and each movable block comprises a nozzle mounting portion and a sliding limiting portion. The nozzle mounting portion extends out of the mounting groove and is connected to a first nozzle. The sliding limiting portion is slidably connected to the two guide rods, the pitch-changing shaft passes through the sliding limiting portions of all the movable blocks and one end is connected to a pitch-changing driving device. The fixed seat is provided with a slide rail mechanism above the mounting groove, and the slide rail mechanism comprises a fixed base plate, a pair of parallel guide rails are provided on the fixed base plate, and a plurality of sliders are slidably connected to the guide rails, and the plurality of sliders are in a one-to-one correspondence with the plurality of movable blocks, and each slider is connected to an air valve block, and the air valve block is connected to a vertical ventilation hard pipe, and the ventilation hard pipe passes through and extends to the bottom of the corresponding nozzle mounting portion and is connected to a second nozzle.

2. A multi-station variable distance mechanism according to claim 1, characterized in that: The sliding limit parts of the plurality of movable blocks are all provided with coaxial variable pitch through holes, and the apertures of the variable pitch through holes of the plurality of movable blocks increase sequentially from left to right.

3. A multi-station variable distance mechanism according to claim 2, characterized in that: The pitch-variable shaft is provided with a stepped diameter-variable structure, and the outer diameter of the pitch-variable shaft increases gradually from left to right in a stepped manner.

4. A multi-station variable distance mechanism according to claim 3, characterized in that: The movable block located at the leftmost end is fixedly connected to the left end portion of the pitch-changing shaft, and the movable block located at the rightmost end is fixedly connected to the right end portion of the guide rod.

5. The multi-station variable distance mechanism according to claim 1, characterized in that: The number of the movable blocks is 5 to 12, the number of the multi-stage limiting steps of the installation slot is greater than or equal to the number of the movable blocks, and the length of each step of the multi-stage limiting steps is the same.

6. The multi-station variable distance mechanism according to claim 1, characterized in that: The variable pitch drive device includes a slide cylinder, a drive plate, and a push rod. The slide cylinder is fixedly installed on a side opposite to the mounting groove. The movable end of the slide cylinder is connected to the drive plate, and the drive plate is connected to the push rod. A notch is provided on one side of the mounting groove, and the push rod passes through the notch and is connected to the variable pitch shaft.

7. The multi-station variable distance mechanism according to claim 1, characterized in that: The sliding limit parts of the plurality of movable blocks are each provided with two guide through holes matched with the guide rods, and the two guide rods respectively penetrate the two through holes of the sliding limit part.

8. The multi-station variable distance mechanism according to claim 1, characterized in that: The upper and lower sides of the installation slot are both provided with variable distance limiting modules, the multi-stage limiting steps are arranged on the upper side or the lower side of the variable distance limiting module, and the variable distance limiting module and the fixing seat are detachably installed.

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