Conveying mechanism, directional gripping system and nut runner

Abstract

The application relates to the technical field of nut mounting equipment, and discloses a conveying mechanism, a directional clamping system and a nut driving machine. The conveying mechanism is used for conveying plastic nuts. The plastic nut comprises a main body part in the shape of a strip and an open end arranged at one end of the main body part. An annular boss is arranged on the outer periphery of the open end. The conveying mechanism comprises a vibrating disc used for containing the plastic nut, and a conveying track connected to the outlet of the vibrating disc. The conveying track comprises a containing cavity and a step part arranged at the opening of the containing cavity. The vibrating disc is used for driving the plastic nut to jump, so that when the plastic nut enters the conveying track from the outlet of the vibrating disc, the main body part is located in the containing cavity and the annular boss is overlapped with the step part. The application prevents the plastic nut from being skewed during transportation through the limiting action of the containing cavity and the step part, maintains the position accuracy of the plastic nut during transportation in the vertical posture, so that the clamping mechanism of the nut driving machine can correctly clamp the plastic nut, and the normal nut driving operation is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to nut mounting equipment technical field, specifically relates to a conveying mechanism, directional clamping system and nut driver. BACKGROUND

[0002] At present, when the parts of the liquid inlet pipe and the gas collecting pipe of the air conditioner are assembled, the nut driver is often used to screw the plastic nut to the copper nut of the copper pipe of the liquid inlet pipe and the gas collecting pipe, so as to realize the pre-assembly of the parts on the liquid inlet pipe and the gas collecting pipe before leaving the factory. Therefore, the nut driver is widely used as a device integrating automatic feeding of plastic nut, automatic moving of copper pipe, automatic nut driving and automatic unloading.

[0003] Because the shape of the plastic nut is irregular, and the plastic nut has different shapes during conveying, when the nut driver performs automatic feeding operation, the feeding mechanism is easy to clamp the plastic nut, so that the plastic nut cannot be placed into the tightening head mold during unloading, thereby causing the nut driving operation to be unable to be normally completed, and affecting the production efficiency. SUMMARY

[0004] Therefore, the present application provides a conveying mechanism to solve the problem that the plastic nut is easy to be clamped during the operation of the nut driver, and the nut driving operation cannot be normally completed. Meanwhile, the present application provides a directional clamping system, and the present application provides a nut driver.

[0005] In the first aspect, the present application provides a conveying mechanism for conveying plastic nuts, wherein the plastic nut comprises a main body part in the shape of a strip and an open end provided at one end of the main body part, and an annular boss is provided on the outer periphery of the open end.

[0006] The conveying mechanism comprises:

[0007] A vibrating disc is used to hold the plastic nut.

[0008] A conveying track is connected to the outlet of the vibrating disc, and the conveying track comprises a containing cavity and a stepped portion, and the stepped portion is provided at the opening of the containing cavity.

[0009] The vibrating disc is used to drive the plastic nut to jump, so that when the plastic nut enters the conveying track from the outlet of the vibrating disc, the main body part is located in the containing cavity and the annular boss is lapped on the stepped portion.

[0010] Beneficial effects: the application provides a conveying mechanism, which drives the plastic nut to jump by the vibration of the vibration disc, so as to change the posture of the plastic nut in the vibration disc; the conveying track with the accommodating cavity and the step part is connected to the outlet of the vibration disc, when the plastic nut in the vertical posture jumps to the outlet of the vibration disc, the main body part can be placed in the accommodating cavity and the annular boss can be overlapped on the step part, so that the plastic nut in the vertical posture can enter the conveying track from the outlet of the vibration disc, the limiting action of the accommodating cavity and the step part prevents the plastic nut from being skewed during transportation, keeps the position accuracy of the plastic nut in the vertical posture during transportation, so that the clamping mechanism of the nut driver correctly clamps the plastic nut, thereby ensuring the normal operation of the nut driver.

[0011] In an alternative embodiment, the width of the accommodating cavity is smaller than the diameter of the annular boss, and the width of the accommodating cavity is greater than the outer diameter of the main body part.

[0012] Beneficial effects: the width of the accommodating cavity is greater than the outer diameter of the main body part to facilitate the plastic nut to smoothly enter the accommodating cavity of the conveying track; the width of the accommodating cavity is smaller than the diameter of the annular boss to facilitate the limiting of the plastic nut by the step part, avoiding the plastic nut from being skewed or inverted.

[0013] In an alternative embodiment, the outer periphery of the main body part is provided with a rib, a plurality of ribs are arranged along the outer periphery of the main body part and arranged opposite to each other, and the width of the accommodating cavity is greater than the distance between the two opposite ribs.

[0014] Beneficial effects: the outer periphery of the main body part is provided with a rib to facilitate the clamping mechanism of the nut driver to clamp the plastic nut; the width of the accommodating cavity is greater than the distance between the two opposite ribs, so that the position of the rib of the main body part in the plastic nut can smoothly enter the accommodating cavity of the conveying track for limiting and transportation.

[0015] In an alternative embodiment, the end of the conveying track is provided with a limiting groove in communication with the accommodating cavity, and the limiting groove is shaped with the rib.

[0016] Beneficial effects: the limiting groove at the end of the conveying track is shaped with the rib, so that the plastic nut transported in the conveying track is further limited at the end of the conveying track, that is, one rib of the plastic nut is embedded in the limiting groove at the end of the conveying track, so as to improve the clamping position accuracy of the clamping mechanism of the nut driver to clamp the plastic nut.

[0017] In an alternative embodiment, the side of the limiting groove close to the accommodating cavity is provided with a let-in groove, and the let-in groove is in a circular arc structure.

[0018] Beneficial effects: The limiting groove is provided with a circular arc structure to guide the convex rib of the plastic nut, so that the convex rib of the plastic nut is smoothly embedded in the limiting groove.

[0019] In a second aspect, the present application further provides a directional clamping system for clamping a plastic nut, which comprises:

[0020] The conveying mechanism described in the above embodiment is used for conveying the plastic nut, and the end of the conveying track is provided with a avoiding part; when the plastic nut is conveyed to the avoiding part, the main body part of the plastic nut is exposed from the conveying track;

[0021] The directional clamping mechanism is provided with a clamp for clamping the plastic nut, and the clamping inner cavity of the clamp is profiled with the outer peripheral contour of the plastic nut.

[0022] Beneficial effects: The present application provides a directional clamping system, which sets an avoiding part at the end of the conveying track to expose the main body part of the plastic nut from the conveying track, so that the clamp of the clamping mechanism can clamp the plastic nut; the clamping inner cavity of the clamp is profiled with the outer peripheral contour of the plastic nut, which prevents the clamp from being skewed when clamping the plastic nut, maintains the vertical posture of the plastic nut entering the next station and ensures the positional accuracy, so that the nut driving mechanism of the nut driver can smoothly drive the plastic nut to rotate, thereby ensuring the normal operation of the nut driving operation.

[0023] In an alternative embodiment, the clamp comprises a plurality of clamping jaws, which are openably and closably arranged and form the clamping inner cavity in combination;

[0024] The clamping jaw is provided with a vertical groove and an arc-shaped groove, the vertical groove is profiled with the convex rib of the plastic nut, and the arc-shaped groove is profiled with the annular boss of the plastic nut.

[0025] Beneficial effects: When the clamp clamps the plastic nut, the vertical groove of the clamping jaw corresponds and cooperates with the convex rib of the plastic nut, and the arc-shaped groove of the clamping jaw corresponds and cooperates with the annular boss of the plastic nut, thereby realizing the stable clamping of the clamp on the plastic nut.

[0026] In an alternative embodiment, the directional clamping mechanism further comprises:

[0027] The lifting driving member is connected with the clamp, and the lifting driving member is used for driving the clamp to lift;

[0028] The translation driving member is connected with the lifting driving member, and the translation driving member is used for driving the lifting driving member to move horizontally.

[0029] Beneficial effects: the clamp is driven to move correspondingly by the lifting driving member and the translation driving member, so that the plastic nut clamped by the clamp is transported to the next station, and is prepared for the screwing operation of the plastic nut.

[0030] In a third aspect, the present application further provides a nut driver for screwing plastic nuts to cooperating workpieces, the nut driver comprising:

[0031] The directional clamping system described in the above embodiments is used for clamping plastic nuts.

[0032] The nut driver system is provided with a screwing head for containing the plastic nuts, and the screwing head is driven to rotate to screw the plastic nuts to the cooperating workpieces.

[0033] The alignment assembly comprises a sensing member and a sensor, the sensing member is connected to the outside of the screwing head and can rotate synchronously with the screwing head, and the sensor is fixedly installed and correspondingly arranged with the sensing member.

[0034] After the plastic nuts are screwed to the cooperating workpieces, the screwing head is driven to rotate to the state that the sensing member is aligned with the sensor and stops rotating.

[0035] Beneficial effects: the present application provides a nut driver, which utilizes the screwing head of the nut driver system to screw plastic nuts to cooperating workpieces for screwing operation; the position sensing between the sensing member and the sensor in the alignment assembly ensures that the screwing head stops at a fixed position each time, so as to facilitate the screwing head to accurately receive the nuts next time and smoothly perform the next screwing operation, thereby ensuring the normal operation of the nut driving operation.

[0036] In an optional embodiment, the sensing member is provided on a sensing rod extending in the radial direction of the screwing head, and the sensor is provided as a proximity sensor.

[0037] Beneficial effects: the position sensing between the sensing rod and the proximity sensor ensures that the screwing head stops at a fixed position each time. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0039] Figure 1 The structure diagram of the conveying mechanism, the directional clamping system and the nut driver provided by the present application;

[0040] Figure 2 Structure diagram of the plastic nut provided by the present application;

[0041] Figure 3 Front view of the plastic nut provided by the present application;

[0042] Figure 4 Structure diagram of the conveying mechanism provided by the present application;

[0043] Figure 5 Top view of the conveying mechanism provided by the present application;

[0044] Figure 6 Structure diagram of the conveying track provided by the present application;

[0045] Figure 7 Structure diagram of the conveying track provided by the present application from another perspective;

[0046] Figure 8 Structure diagram of the Figure 7 Partial enlarged diagram of A in the structure diagram of the present application;

[0047] Figure 9 Structure diagram of the directional clamping mechanism provided by the present application;

[0048] Figure 10 Top view of the directional clamping mechanism provided by the present application;

[0049] Figure 11 Front view of the directional clamping mechanism provided by the present application;

[0050] Figure 12 Sectional view of the clamp provided by the present application;

[0051] Figure 13 Structure diagram of the clamping jaw provided by the present application;

[0052] Figure 14 Sectional view of the clamping jaw provided by the present application;

[0053] Figure 15 Side view of the conveying mechanism, the directional clamping system and the nut driver provided by the present application;

[0054] Figure 16 Top view of the conveying mechanism, the directional clamping system and the nut driver provided by the present application;

[0055] Figure 17 Front view of the conveying mechanism, the directional clamping system and the nut driver provided by the present application;

[0056] Figure 18 Structure diagram of the workpiece provided by the present application;

[0057] Figure 19 Structure diagram of nut driving system provided by the present application;

[0058] Figure 20 Structure diagram of nut driving system provided by the present application;

[0059] Figure 21 Structure diagram of nut driving system provided by the present application;

[0060] Figure 22 Structure diagram of nut driving system provided by the present application.

[0061] Explanation of reference signs:

[0062] 1, vibration disc; 11, outlet;

[0063] 2, conveying track; 21, accommodating cavity; 22, step part; 23, limiting groove; 24, giving way groove; 25, avoiding part;

[0064] 10, plastic nut; 101, main body part; 1011, convex rib; 102, annular boss;

[0065] 20, conveying mechanism;

[0066] 30, directional clamping mechanism;

[0067] 301, clamp; 3011, clamping jaw; 30111, vertical groove; 30112, arc-shaped groove;

[0068] 302, lifting driving part;

[0069] 303, translation driving part;

[0070] 304, clamping cylinder;

[0071] 100, nut driving system; 1001, nut driving head; 10011, assembly cavity; 1002, inductive part; 1003, sensor; 1004, speed reducer; 1005, servo motor; 1006, lifting screw; 1007, lifting motor;

[0072] 200, matched workpiece. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0074] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0075] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict.

[0077] The embodiments of the present application will be described below in conjunction with Figures 1-22 .

[0078] According to an embodiment of the present application, on the one hand, as shown in Figure 1 , Figure 4 , Figure 5 , Figure 6 , a conveying mechanism is provided for conveying a plastic nut 10, which includes a main body portion 101 in the shape of a long strip and an open end provided at one end of the main body portion 101, and an annular boss 102 is provided on the outer periphery of the open end.

[0079] Specifically, as shown in Figure 2 , Figure 3 , the plastic nut 10 is in the shape of a long strip as a whole, one end of the main body portion 101 is provided as an open end, the open end is internally threaded, and is used to assemble and form a threaded connection with the copper nut of the liquid inlet pipe and the gas collecting pipe; the annular boss 102 on the outer periphery of the open end is arranged along the circumference of the open end, and is in the shape of a ring as a whole and extends outwardly from the outer periphery of the main body portion 101 in the radial direction of the main body portion 101.

[0080] The conveying mechanism comprises a vibrating disc 1 and a conveying track 2.

[0081] The vibrating disc 1 is used for containing plastic nuts 10; the conveying track 2 is connected to the outlet 11 of the vibrating disc 1, and comprises a containing cavity 21 and a step portion 22 arranged at the opening of the containing cavity 21; the vibrating disc 1 is used for driving the plastic nuts 10 to jump, so that when the plastic nuts 10 enter the conveying track 2 from the outlet 11 of the vibrating disc 1, the main body portion 101 is located in the containing cavity 21 and the annular boss 102 is overlapped on the step portion 22.

[0082] In the above embodiment, the plastic nuts 10 are driven to jump by the vibration of the vibrating disc 1, so as to change the posture of the plastic nuts 10 in the vibrating disc 1; the conveying track 2 comprising the containing cavity 21 and the step portion 22 is connected to the outlet 11 of the vibrating disc 1, and when the plastic nuts 10 in vertical posture enter the conveying track 2 from the outlet 11 of the vibrating disc 1, the main body portion 101 can be located in the containing cavity 21 and the annular boss 102 can be overlapped on the step portion 22, so that the plastic nuts 10 in vertical posture can enter the conveying track 2 from the outlet 11 of the vibrating disc 1, and the containing cavity 21 and the step portion 22 can limit the plastic nuts 10 from being skewed during transportation, so as to keep the plastic nuts 10 in vertical posture and accurate in position, so that the clamping mechanism of the nut driver can correctly clamp the plastic nuts 10, thereby ensuring the normal operation of the nut driver.

[0083] Specifically, the width of the containing cavity 21 in the conveying track 2 is designed to be slightly larger than the outer diameter of the main body portion 101 of the plastic nuts 10, so that the plastic nuts 10 can smoothly enter the containing cavity 21 of the conveying track 2 under the vibration of the vibrating disc 1; and the width of the containing cavity 21 is slightly smaller than the diameter of the annular boss 102 of the plastic nuts 10, so that the annular boss 102 of the plastic nuts 10 can be overlapped on the step portion 22 to avoid skewing, and the annular boss 102 overlapped on the step portion 22 for conveying can also ensure that the opening end of the main body portion 101 is always upward, avoiding the plastic nuts 10 from being inverted in the containing cavity 21.

[0084] Further, two vibrating discs 1 are arranged in one nut driver in the embodiment, and two sets of track conveying tracks 2 are connected respectively, so as to improve the transportation efficiency.

[0085] In some embodiments, as shown in Figure 2 , Figure 6 the width of the containing cavity 21 is smaller than the diameter of the annular boss 102, and the width of the containing cavity 21 is larger than the outer diameter of the main body portion 101.

[0086] In the above embodiments, the width of the accommodating cavity 21 is greater than the outer diameter of the body part 101 to facilitate the plastic nut 10 to smoothly enter the accommodating cavity 21 of the conveying track 2; and the width of the accommodating cavity 21 is less than the diameter of the annular boss 102 to facilitate the plastic nut 10 to be positioned by the step part 22, so as to avoid the plastic nut 10 to be skewed or inverted.

[0087] Specifically, in the embodiment, the width of the accommodating cavity 21 of the conveying track 2 is 16.4 mm, the diameter of the annular boss 102 of the plastic nut 10 is 18 mm, and the outer diameter of the body part 101 of the plastic nut 10 is 16 mm, so as to meet the design requirement that the width of the accommodating cavity 21 is less than the diameter of the annular boss 102 and greater than the outer diameter of the body part 101. Of course, under the premise of meeting the above design requirement, the above dimensions can be adaptively adjusted within a certain range for different types of equipment.

[0088] In some embodiments, as shown in Figure 2 , Figure 6 , the outer periphery of the body part 101 is provided with a plurality of ribs 1011 which are arranged at intervals along the outer periphery of the body part 101 and oppositely arranged in pairs, and the width of the accommodating cavity 21 is greater than the distance between the oppositely arranged two ribs 1011.

[0089] In the above embodiments, the outer periphery of the body part 101 is provided with a plurality of ribs 1011 to facilitate the gripping mechanism of the nut driver to grip the plastic nut 10; and the width of the accommodating cavity 21 is greater than the distance between the oppositely arranged two ribs 1011 to facilitate the position of the ribs 1011 of the body part 101 in the plastic nut 10 to smoothly enter the accommodating cavity 21 of the conveying track 2 for positioning and transportation.

[0090] Specifically, a plurality of ribs 1011 are uniformly arranged at intervals along the vertical direction of the outer periphery of the body part 101 to facilitate the gripping mechanism of the nut driver to grip the plastic nut 10 by specially setting the claw; in the embodiment, the oppositely arranged two ribs 1011 are symmetrically arranged, and the distance between the oppositely arranged two ribs 1011 is 16 mm, which can smoothly enter the accommodating cavity 21 of the conveying track 2 with a width of 16.4 mm for positioning and transportation.

[0091] Further, six ribs 1011 are uniformly arranged at intervals along the vertical direction of the outer periphery of the body part 101, and by optimizing the size, one group of oppositely arranged two ribs 1011 of the plastic nut 10 is transported along the extension direction of the conveying track 2, and two ribs 1011 are distributed on both sides of the group of ribs 1011, and the part of the annular boss 102 between the two adjacent ribs 1011 of the plastic nut 10 is overlapped on the step part 22 during transportation.

[0092] In some embodiments, as shown in Figure 2 , Figure 7 ,Figure 8 As shown, the end of the conveying track 2 is provided with a limiting groove 23 in communication with the accommodating cavity 21, and the limiting groove 23 is shaped in imitation of the protruding rib 1011.

[0093] In the above embodiment, the limiting groove 23 at the end of the conveying track 2 is shaped in imitation of the protruding rib 1011, so as to further limit the plastic nut 10 transported in the conveying track 2 at the end of the conveying track 2, i.e. to make one protruding rib 1011 of the plastic nut 10 embedded in the limiting groove 23 at the end of the conveying track 2, so as to improve the accuracy of the clamping position of the clamping mechanism of the nut driving machine for clamping the plastic nut 10.

[0094] Specifically, the limiting groove 23 is arranged in the same direction as the extending direction of the conveying track 2 and located at the middle position of the edge at the end of the conveying track 2; in the embodiment, the six protruding ribs 1011 are uniformly arranged along the vertical direction on the outer periphery of the main body 101 of the plastic nut 10, and through the optimization of the size design, one set of two oppositely arranged protruding ribs 1011 of the plastic nut 10 are transported along the extending direction of the conveying track 2, at this time, one protruding rib 1011 in front of the plastic nut 10 will come to the end of the conveying track 2 in advance and be embedded in the limiting groove 23 at the end of the conveying track 2 for further limiting, so as to adjust the posture of the plastic nut 10 to at least one set of two oppositely arranged protruding ribs 1011 in the same direction as the extending direction of the conveying track 2, so as to be clamped by the clamping mechanism of the nut driving machine.

[0095] In some embodiments, as shown in Figure 2 , Figure 7 , Figure 8 As shown, the side of the limiting groove 23 close to the accommodating cavity 21 is provided with a giving groove 24 in the form of a circular arc.

[0096] In the above embodiment, the giving groove 24 in the form of a circular arc guides the protruding rib 1011 of the plastic nut 10, so as to make the protruding rib 1011 of the plastic nut 10 smoothly embedded in the limiting groove 23.

[0097] Specifically, by optimizing the size design, one of the two relatively arranged protrusions 1011 of the plastic nut 10 is transported along the extension direction of the conveying track 2, that is, the orientation of the two relatively arranged protrusions 1011 is actually offset by a small angle from the extension direction of the conveying track 2; by arranging the arc-shaped accommodation groove 24 communicating with the limiting groove 23, the protrusion 1011 in front of the plastic nut 10 reaching the end of the conveying track 2 first is guided by the accommodation groove 24 to drive the plastic nut 10 to rotate slightly to adjust the orientation of the protrusion 1011, so that the orientation of the two relatively arranged protrusions 1011 of the plastic nut 10 is completely consistent with the extension direction of the conveying track 2, thereby facilitating the protrusion 1011 of the plastic nut 10 to be smoothly embedded in the limiting groove 23. Moreover, the arc-shaped accommodation groove 24 can match the arc-shaped outer wall of the plastic nut 10 after the protrusion 1011 of the plastic nut 10 is smoothly embedded in the limiting groove 23, thereby further limiting the plastic nut 10.

[0098] Further, the accommodation groove 24 is provided with two, respectively located on both sides of the limiting groove 23.

[0099] According to the embodiment of the present application, on the other hand, as Figure 1 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 indicated, a directional clamping system is also provided for clamping the plastic nut 10, which comprises the conveying mechanism 20 and the directional clamping mechanism 30 of the above-mentioned embodiments.

[0100] The conveying mechanism 20 is used for conveying the plastic nut 10, and the end of the conveying track 2 in the conveying mechanism 20 is provided with a avoiding part 25; when the plastic nut 10 is conveyed to the avoiding part 25, the main body part 101 of the plastic nut 10 is exposed from the conveying track 2; the directional clamping mechanism 30 is provided with a clamp 301 for clamping the plastic nut 10, and the clamping inner cavity of the clamp 301 is shaped with the outer contour of the plastic nut 10.

[0101] In the above-mentioned embodiments, the avoiding part 25 is arranged at the end of the conveying track 2 to expose the main body part 101 of the plastic nut 10 from the conveying track 2, so as to facilitate the clamp 301 of the directional clamping mechanism 30 to clamp the plastic nut 10; the clamping inner cavity of the clamp 301 is shaped with the outer contour of the plastic nut 10, which prevents the clamp 301 from being skewed when clamping the plastic nut 10, maintains the vertical posture of the plastic nut 10 entering the next station and ensures the positional accuracy, so as to facilitate the nut driving mechanism of the nut driver to smoothly drive the plastic nut 10 to rotate, thereby ensuring the normal operation of the nut driving work.

[0102] Specifically, asFigure 6 、 Figure 9 As shown in FIG. 25, the avoiding part 25 is provided as two notches at the end of the conveying track 2, when the plastic nut 10 is transported to the end of the conveying track 2, the annular boss 102 and part of the body part 101 of the plastic nut 10 are exposed from the conveying track 2 by the avoiding part 25; the clamp 301 is driven by the clamping cylinder 304 to clamp the plastic nut 10 exposed from the conveying track 2 by the avoiding part 25 at the end of the conveying track 2.

[0103] In some embodiments, as shown in FIG. 26, the clamp 301 includes a plurality of clamping jaws 3011, and the plurality of clamping jaws 3011 are arranged to be opened and closed and form a clamping inner cavity; the clamping jaw 3011 is provided with a vertical groove 30111 and an arc-shaped groove 30112, the vertical groove 30111 is shaped with the convex rib 1011 of the plastic nut 10, and the arc-shaped groove 30112 is shaped with the annular boss 102 of the plastic nut 10. Figure 12 、 Figure 13 、 Figure 14 As shown in FIG. 26, the clamp 301 includes a plurality of clamping jaws 3011, and the plurality of clamping jaws 3011 are arranged to be opened and closed and form a clamping inner cavity; the clamping jaw 3011 is provided with a vertical groove 30111 and an arc-shaped groove 30112, the vertical groove 30111 is shaped with the convex rib 1011 of the plastic nut 10, and the arc-shaped groove 30112 is shaped with the annular boss 102 of the plastic nut 10.

[0104] In the above embodiments, when the clamp 301 clamps the plastic nut 10, the vertical groove 30111 of the clamping jaw 3011 corresponds to the convex rib 1011 of the plastic nut 10, and the arc-shaped groove 30112 of the clamping jaw 3011 corresponds to the annular boss 102 of the plastic nut 10, thereby realizing the stable clamping of the clamp 301 to the plastic nut 10.

[0105] Specifically, in the present embodiment, the body part 101 of the plastic nut 10 is provided with six convex ribs 1011 along the vertical direction at equal intervals; the clamp 301 is provided with three clamping jaws 3011 of the same specification, each clamping jaw 3011 is provided with an arc-shaped groove 30112 of the same height; the middle part of each clamping jaw 3011 is provided with a vertical groove 30111 for cooperating with one convex rib 1011 of the plastic nut 10, and the two sides of each clamping jaw 3011 are further provided with two vertical clearance grooves, the width of the vertical clearance groove is half of the width of the vertical groove 30111, when the clamp 301 is closed, the two vertical clearance grooves between the adjacent two clamping jaws 3011 are close to each other and form a groove structure of the same size as the vertical groove 30111, which can also cooperate with one convex rib 1011 of the plastic nut 10; in this way, the three arc-shaped grooves 30112 on the three clamping jaws 3011 of the same specification form a whole circular groove body which cooperates with the annular boss 102 of the plastic nut 10, and the one vertical groove 30111 and the two vertical clearance grooves on each of the three clamping jaws 3011 of the same specification form six vertical grooves 30111 at equal intervals or groove structures of the same size as the vertical groove 30111, thereby cooperating with the six convex ribs 1011 of the plastic nut 10.

[0106] In some embodiments, as shown in FIG. 27, the clamp 301 includes a plurality of clamping jaws 3011, and the plurality of clamping jaws 3011 are arranged to be opened and closed and form a clamping inner cavity; the clamping jaw 3011 is provided with a vertical groove 30111 and an arc-shaped groove 30112, the vertical groove 30111 is shaped with the convex rib 1011 of the plastic nut 10, and the arc-shaped groove 30112 is shaped with the annular boss 102 of the plastic nut 10. Figure 9 、 Figure 10、 Figure 11 The directional clamping mechanism 30 further comprises a lifting driving member 302 and a horizontal driving member 303.

[0107] The lifting driving member 302 is connected with the clamp 301 and is used to drive the clamp 301 to lift; the horizontal driving member 303 is connected with the lifting driving member 302 and is used to drive the lifting driving member 302 to move horizontally.

[0108] In the above embodiment, the clamp 301 is driven to move correspondingly by the lifting driving member 302 and the horizontal driving member 303, so as to transport the plastic nut 10 clamped by the clamp 301 to the next work station and prepare for the screwing operation of the plastic nut 10.

[0109] Specifically, the lifting driving member 302 is a lifting cylinder, and the horizontal driving member 303 is a horizontal cylinder.

[0110] According to the embodiment of the present application, in another aspect, as Figure 1 、 Figure 15 、 Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21 、 Figure 22 As shown, a nut driver is further provided, which is used to screw the plastic nut 10 to the matched workpiece 200, and the nut driver comprises the directional clamping system, the nut driving system 100 and the alignment assembly.

[0111] The directional clamping system is used to clamp the plastic nut 10; the nut driving system 100 is provided with a screwing head 1001 for containing the plastic nut 10, the screwing head 1001 is driven to rotate to screw the plastic nut 10 to the matched workpiece 200; the alignment assembly comprises a sensing member 1002 and a sensor 1003, the sensing member 1002 is connected to the outside of the screwing head 1001 and can rotate synchronously with the screwing head 1001, the sensor 1003 is fixedly installed and is correspondingly arranged with the sensing member 1002; after the plastic nut 10 is screwed to the matched workpiece 200, the screwing head 1001 is driven to rotate to the state that the sensing member 1002 is aligned with the sensor 1003 and stops rotating.

[0112] In the above embodiment, the screwing head 1001 of the nut driving system 100 is used to screw the plastic nut 10 to the matched workpiece 200 to perform the screwing operation; the position sensing is performed between the sensing member 1002 and the sensor 1003 in the alignment assembly, so as to ensure that the screwing head 1001 stops at a fixed position each time, so as to facilitate the screwing head 1001 to accurately receive the nut next time and smoothly perform the next screwing operation, thereby ensuring the normal operation of the nut driving operation.

[0113] Specifically, as shown in Figure 19 , Figure 20 the interior of the screwing head 1001 is provided with a hexagonal assembly cavity 10011, the plastic nut 10 is placed in the assembly cavity 10011 under the driving action of the directional clamping mechanism 30, and the six protrusions 1011 of the plastic nut 10 are limited in the six positions of the assembly cavity 10011 one by one, so that the screwing head 1001 drives the plastic nut 10 to rotate for screwing operation when driven.

[0114] Further, as shown in Figure 18 , the cooperating workpiece 200 is a copper nut of a copper pipe serving as a liquid inlet pipe or a gas collecting pipe, after the plastic nut 10 is placed in the assembly cavity 10011 of the screwing head 1001, the manipulator clamps the cooperating workpiece 200 and fixes it above the screwing head 1001, and the nut driving system 100 drives the screwing head 1001 to move and rotate to assemble the plastic nut 10 to the cooperating workpiece 200.

[0115] Further, as shown in Figure 19 , Figure 21 the nut driving system 100 further comprises a speed reducer 1004, a servo motor 1005, a lifting lead screw 1006 and a lifting motor 1007. The speed reducer 1004 and the servo motor 1005 are in transmission connection with the screwing head 1001 for driving the screwing head 1001 to rotate at a constant speed, two speed reducers 1004 are installed on a mounting plate, so that the two groups of screwing heads 1001, speed reducers 1004 and servo motors 1005 can be lifted synchronously with the mounting plate; the lifting lead screw 1006 is in transmission connection with the mounting plate and is driven by the lifting motor 1007 to drive the mounting plate and the two groups of screwing heads 1001, speed reducers 1004 and servo motors 1005 on it to lift synchronously, so as to adjust the height position of the screwing head 1001 and the plastic nut 10 therein.

[0116] In some embodiments, as shown in Figure 19 , Figure 21 the inductor 1002 is arranged on an inductive rod extending in the radial direction of the screwing head 1001, and the sensor 1003 is a proximity sensor.

[0117] In the above embodiments, the inductive rod and the proximity sensor are used for position sensing to realize that the screwing head 1001 stops at a fixed position each time.

[0118] Specifically, the sensor 1003 is installed on the mounting plate provided with the speed reducer 1004 through a vertical plate.

[0119] The working mode of the nut driving machine provided by the embodiment is as follows:

[0120] The plastic nut 10 is bounced in the vibration disc 1 and enters the conveying track 2 from the outlet 11 of the vibration disc 1 in a vertical posture, and the main body 101 of the plastic nut 10 is placed in the accommodating cavity 21 and the annular boss 102 is overlapped on the stepped portion 22 when the plastic nut 10 is in the conveying track 2, and is transported in a posture that one set of two opposite convex ribs 1011 is directed along the extension direction of the conveying track 2; when the plastic nut 10 is transported to the end of the conveying track 2, the set of two opposite convex ribs 1011 of the plastic nut 10 is guided by the orientation of the displacement slot 24 to be completely consistent with the extension direction of the conveying track 2, and the front convex rib 1011 is smoothly embedded in the limiting slot 23, at this time, the main body 101 of the plastic nut 10 is exposed from the conveying track 2 at the displacement portion 25 at the end of the conveying track 2; the directional clamping mechanism 30 drives the clamping cylinder 304 and the clamp 301 on the clamping cylinder 304 to operate by the lifting drive 302 and the translation drive 303, clamps the plastic nut 10 by the three clamping jaws 3011 on the clamp 301 which are profiled with the outer contour of the plastic nut 10, and transports the plastic nut 10 to the screwing head 1001 of the nut tightening system 100 by the lifting drive 302 and the translation drive 303; the mechanical hand clamps the workpiece 200 and fixes it above the screwing head 1001, the lifting screw 1006 and the lifting motor 1007 of the nut tightening system 100 drive the screwing head 1001 to move upward to the position where the plastic nut 10 contacts the workpiece 200 in the screwing head 1001, the reduction gear 1004 and the servo motor 1005 of the nut tightening system 100 drive the screwing head 1001 to rotate to screw the plastic nut 10 to the workpiece 200; then the lifting screw 1006 and the lifting motor 1007 of the nut tightening system 100 drive the screwing head 1001 to move downward to reset, at this time, the screwing head 1001 rotates at a reduced speed under the action of inertia, the inductor 1002 in the inductor 1002 fixedly connected outside the screwing head 1001 is stopped at a fixed position under the position sensing action of the sensor 1003, and is ready to accept the plastic nut 10 in the next operation.

[0121] Although the embodiments of the present application have been described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the present application.

Claims

1. A conveying mechanism for conveying plastic nuts (10), the plastic nut (10) comprising a long strip-shaped main body (101) and an open end provided at one end of the main body (101), and an annular boss (102) provided at the outer periphery of the open end; characterized in that The conveying mechanism comprises: a vibrating disc (1) for containing the plastic nut (10); a conveying track (2) connected at the outlet (11) of the vibrating disc (1), the conveying track (2) comprising a containing cavity (21) and a stepped portion (22) provided at the opening of the containing cavity (21); the vibrating disc (1) is used to drive the plastic nut (10) to jump, so that when the plastic nut (10) enters the conveying track (2) from the outlet (11) of the vibrating disc (1), the main body (101) is located in the containing cavity (21) and the annular boss (102) is overlapped on the stepped portion (22); the outer periphery of the main body (101) is provided with a plurality of ribs (1011) arranged in pairs on the outer periphery of the main body (101), and the width of the containing cavity (21) is greater than the distance between the two ribs (1011) arranged in pairs; the end of the conveying track (2) is provided with a limiting groove (23) communicating with the containing cavity (21), and the limiting groove (23) is shaped with the ribs (1011).

2. The delivery mechanism of claim 1, wherein, The width of the containing cavity (21) is less than the diameter of the annular boss (102), and the width of the containing cavity (21) is greater than the outer diameter of the main body (101).

3. The delivery mechanism of claim 1, wherein, The side of the limiting groove (23) close to the containing cavity (21) is provided with a let-in groove (24) in the form of a circular arc.

4. A directional gripping system for gripping plastic nuts (10), characterized in that, The directional clamping system comprises: the conveying mechanism (20) of any one of claims 1-3, the end of the conveying track (2) of the conveying mechanism (20) is provided with a avoiding portion (25); when the plastic nut (10) is conveyed to the avoiding portion (25), the main body (101) of the plastic nut (10) is exposed from the conveying track (2); a directional clamping mechanism (30) provided with a clamp (301) for clamping the plastic nut (10), the clamping inner cavity of the clamp (301) is shaped with the outer periphery contour of the plastic nut (10).

5. The directional gripping system of claim 4, wherein, The clamp (301) comprises a plurality of clamping jaws (3011), and the plurality of clamping jaws (3011) are arranged in an openable and closable manner and form the clamping inner cavity; the clamping jaw (3011) is provided with a vertical groove (30111) and an arc-shaped groove (30112), the vertical groove (30111) is shaped with the rib (1011) of the plastic nut (10), and the arc-shaped groove (30112) is shaped with the annular boss (102) of the plastic nut (10).

6. The directional gripping system according to claim 4 or 5, characterized in that The directional clamping mechanism (30) further comprises: A lifting driving member (302) is connected with the clamp (301), and the lifting driving member (302) is used for driving the clamp (301) to lift and fall; A horizontal driving member (303) is connected with the lifting driving member (302), and the horizontal driving member (303) is used for driving the lifting driving member (302) to move horizontally.

7. A nut runner for screwing a plastic nut (10) to a mating workpiece (200), characterized in that, The nut tightening machine comprises: The directional clamping system according to any one of claims 4-6 is used for clamping a plastic nut (10); The nut tightening system (100) is provided with a screw head (1001) for containing the plastic nut (10), and the screw head (1001) is driven to rotate to screw the plastic nut (10) to the matched workpiece (200); The alignment assembly comprises a sensing member (1002) and a sensor (1003), the sensing member (1002) is connected to the outer side of the screw head (1001) and can rotate synchronously with the screw head (1001), and the sensor (1003) is fixedly installed and correspondingly arranged with the sensing member (1002); After the plastic nut (10) is screwed to the matched workpiece (200), the screw head (1001) is driven to rotate to the state that the sensing member (1002) is aligned with the sensor (1003) and stops rotating.

8. The nut runner of claim 7, wherein, The sensing member (1002) is arranged on a sensing rod extending in the radial direction of the screw head (1001), and the sensor (1003) is an approaching sensor.

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