Nut taking and discharging mechanism

Abstract

The utility model provides a nut taking and discharging mechanism which comprises a push rod assembly, a connecting plate and a push rod positioning plate, the connecting plate and the push rod positioning plate are arranged in a separated mode, and a push rod connected with the push rod positioning plate is arranged in the push rod assembly. A material suction bottom plate is fixedly arranged at the bottom of the connecting plate, a material taking hole capable of containing a nut is formed in the material suction bottom plate, a cavity is formed in the connecting plate, and an air nozzle communicated with the cavity is arranged on the connecting plate so that a negative pressure suction section communicated with the material taking hole can be formed in the cavity. Part of the rod section of the push rod extends into the cavity and can form a suction limiting state for the nut, and a sealing ring is arranged on the rod section, extending into the cavity, of the push rod. Negative pressure is formed in the cavity of the connecting plate by matching the air tap with negative pressure equipment, so that the gravity of the nut is counteracted through negative pressure suction force after the nut is jacked into the material taking hole with the matched size, and the adsorption effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of material taking and placing equipment, in particular to a nut taking and placing mechanism. Background Art

[0002] The assembly process of the middle frame of mobile phones and tablets often involves nut assembly and welding. The types and quantities of nuts involved in a single product are diverse and large. Currently, the assembly of middle frame nuts is mainly done manually. When there are many types of nuts, assemblers are prone to mixing and missing, which cannot meet the corresponding needs. Traditional feeding devices often use a single clamp to clamp and feed multiple times, which affects assembly efficiency. In addition, since the nut parts are small and light, and there are holes and protrusions in the middle of the nut, it is not convenient to directly take the material. Utility Model Content

[0003] The utility model aims to provide a material taking and placing mechanism which can simply and conveniently take and place nuts by means of negative pressure suction.

[0004] To this end, the utility model adopts the following technical solutions:

[0005] A nut picking and discharging mechanism comprises a push rod assembly and a connecting plate and a push rod positioning plate which are separately arranged, wherein a push rod connected to the push rod positioning plate is arranged in the push rod assembly; a suction base plate is fixedly arranged at the bottom of the connecting plate, a picking hole for placing nuts is opened in the suction base plate, a cavity is arranged in the connecting plate, an air nozzle connected to the cavity is arranged on the connecting plate, so that a negative pressure suction section connected to the picking hole is formed in the cavity, a partial rod section of the push rod extends into the cavity to form a suction limit state for the nut, and a sealing ring is arranged on the rod section of the push rod extending into the cavity.

[0006] Furthermore, the push rod is provided at its end with a connecting section extending into the material taking hole so as to push the nut out.

[0007] Furthermore: the push rod assembly is clamped with a guide sleeve in the push rod positioning plate, a limit cavity for the push rod to slide is set through the guide sleeve, and a clamping ring is set on the rod section of the push rod extending out of the limit cavity to enable the push rod to move in the same direction as the guide sleeve.

[0008] Furthermore: a spring connected to the push rod is arranged in the limiting cavity of the guide sleeve.

[0009] Furthermore: a push rod pressure plate is connected to the top of the push rod positioning plate, and the push rod pressure plate forms a limiting connection with the guide sleeve.

[0010] Furthermore: a cylinder is installed on the top of the connecting plate, and the piston rod of the cylinder is connected to the push rod positioning plate.

[0011] Furthermore, a guide hole is provided in the material suction bottom plate so that the material suction bottom plate and the fixture can be fitted together to cut the nuts.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model uses an air nozzle in conjunction with a negative pressure device to form a negative pressure in the cavity of the connecting plate, so that after the nut is pushed into the material-collecting hole of the matching size, the gravity of the nut is offset by the negative pressure suction force to achieve an adsorption effect. At the same time, the cavity of the connecting plate and the sealing ring on the push rod and the material-collecting hole form a vacuum circuit, so that there is a vacuum adsorption capacity when sucking materials, and no vacuum is broken when pushing out. The push rod assembly of the utility model adopts flexible pushing to ensure that the nut with a small tilt in the material-collecting hole is guided and pushed into the fixture, which ensures the assembly success rate and well protects the life of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structure assembly drawing of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the push rod assembly of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the negative pressure suction section formed by the utility model and the push rod assembly;

[0017] Figure 4 It is a schematic diagram of the suction bottom plate of the utility model.

[0018] The marks in the accompanying drawings are: 1-suction bottom plate, 11-feeding hole, 12-guiding hole, 2-connecting plate, 21-cavity, 3-cylinder, 4-push rod positioning plate, 5-push rod pressure plate, 51-connecting groove, 6-fixing plate, 7-pillar, 8-push rod assembly, 81-push rod, 811-connecting section, 82-guide sleeve, 821-boss, 822-limiting cavity, 83-spring, 84-circuit ring, 85-sealing ring, 9-air nozzle. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0020] like Figure 1-4As shown, a nut picking and discharging mechanism includes a push rod assembly 8 and a connecting plate 2 and a push rod positioning plate 4 which are separately arranged. A push rod 81 connected to the push rod positioning plate 4 is arranged in the push rod assembly 8; a suction base plate 1 which is connected and fixed to the connecting plate 2 is arranged at the bottom, and a picking hole 11 for placing a nut 10 is opened in the suction base plate 1; a cavity 21 is arranged in the connecting plate 2, and an air nozzle 9 which is connected to the cavity 21 is arranged on the connecting plate 2, so that a negative pressure suction section which is connected to the picking hole 11 is formed in the cavity 21; a part of the rod section of the push rod 81 extends into the cavity 21 to form a suction limit state or a flexible pushing state for the nut 10, and a sealing ring 85 is arranged on the rod section of the push rod 81 which extends into the cavity 21.

[0021] Correspondingly, the number of the material taking holes 11 on the material suction bottom plate 1 can be set to a plurality, and each material taking hole 11 is preferably matched with a single cavity 21 , and a gas nozzle 9 is separately provided for the cavity 21 .

[0022] Specifically, the push rod 81 is provided at its end with a connecting section 811 extending into the material collection hole 11, and the outer diameter of the connecting section 811 is smaller than the aperture of the material collection hole 11, so that an airflow path that provides continuous suction to the nut 10 is formed between the material collection hole 11 and the rod wall of the connecting section 811; and the outer diameter of the connecting section 811 is smaller than the outer diameter of the rod section of the push rod 81 extending into the cavity 21.

[0023] Specifically, in order to prevent the nut 10 from being unable to be pushed out when the push rod assembly 8 is slightly tilted in the material taking hole 11, the push rod assembly 8 is an elastically contractible assembly. The push rod assembly 8 is provided with a guide sleeve 82 in the push rod positioning plate 4, and a limit cavity 822 for the push rod 81 to slide is provided through the guide sleeve 82. The push rod 81 is provided with a clamping ring 84 on the rod section extending out of the limit cavity 822, so that the push rod 81 moves in the same direction as the guide sleeve 82 (such as Figure 2-3 The guide sleeve 82 has a spring 83 connected to the push rod 81 disposed in its limiting cavity 822, and the spring 83 can make the pushing process of the nut 10 smoother.

[0024] In addition, a push rod pressing plate 5 is connected to the top of the push rod positioning plate 4, and the push rod pressing plate 5 forms a limit connection with the guide sleeve 82. A connecting groove 51 is provided in the push rod pressing plate 5, and the connecting groove 51 is divided into two sections, the lower section is connected to the push rod positioning plate 4, and the upper section can be used for the push rod 81 to move; the corresponding guide sleeve 82 is provided with a boss 821 that matches the lower section of the connecting groove 51 on its pipe section extending out of the push rod positioning plate 4.

[0025] Specifically, a cylinder 3 is installed on the top of the connecting plate 2, and a pair of cylinders 3 are symmetrically arranged outside the range of the push rod assembly 8, and the piston rods of the cylinders 3 are connected to the push rod positioning plate 4. At the same time, in order to make the connection between the connecting plate 2 and the push rod positioning plate 4 more stable, an L-shaped limit block around the cylinder 3 can be installed on the top of the connecting plate 2.

[0026] In this embodiment, the material picking and discharging mechanism is also provided with a fixing plate 6 for facilitating its fixing on the required machine, and the fixing plate 6 is provided with a pillar 7 which passes through the push rod positioning plate 4, the push rod pressure plate 5 and is connected to the connecting plate 2; at the same time, in order to facilitate the fitting of the material picking and discharging mechanism with the fixture to carry out the unloading of the nut 10, a guide hole 12 which can be aligned with the positioning pin of the product fixture is opened in the suction bottom plate 1.

[0027] See also Figure 1-4 When the material taking and discharging mechanism takes and discharges the nut 10, the specific contents are as follows:

[0028] The whole mechanism is fixed on the transplanting shaft of the required machine through a fixing plate. When the mechanism moves to the upper material position of the nut 10, after the nut 10 is pushed into the feeding hole 11, the negative pressure device performs vacuum treatment on the cavity 21 through the air nozzle 9. The sealing ring 85 on the push rod 81 is closed, and a vacuum chamber with negative pressure suction is formed in the feeding hole 11 and the cavity 21. The negative pressure of the continuous suction offsets the gravity of the nut 10, so that the nut 10 is fixed in the feeding hole 11. The feeding hole 11 can accurately position the nut 10 for the subsequent introduction of the product.

[0029] Repeat the above steps to suck a specified number of nuts 10. After taking the material, move the mechanism to the discharge position. Align the guide hole 12 of the suction base plate 1 with the positioning pin of the product fixture until the suction base plate 1 fits the fixture, start the cylinder 3, and push the push rod positioning plate 4 and the push rod pressure plate 5 toward the suction base plate 1 through the piston rod of the cylinder 3, thereby driving the push rod 81 to push the nut 10 into the fixture. After the cylinder 3 is in place, close the negative pressure device and the air nozzle 9 to exhaust air so that all the nuts 10 can be loaded into the fixture at one time.

[0030] To prevent the nut 10 from being unable to be pushed out when the push rod assembly 8 is slightly tilted in the material collection hole 11, the nut 10 will compress the spring 83 by compressing the push rod 81. The nut 10 is pressed into the fixture under the action of the spring force, which not only ensures the success rate of assembly but also well protects the life of the fixture.

[0031] The above embodiment is only a preferred technical solution of the present invention. Those skilled in the art should understand that the technical solutions or parameters in the embodiments can be modified or replaced without departing from the principle and essence of the present invention, and all should be included in the protection scope of the present invention.

Claims

1. A nut picking and discharging mechanism, characterized in that: The invention comprises a push rod assembly (8) and a connecting plate (2) and a push rod positioning plate (4) which are separated from each other. The push rod assembly (8) is provided with a push rod (81) connected to the push rod positioning plate (4); a suction base plate (1) is fixedly provided at the bottom of the connecting plate (2), a material taking hole (11) for placing a nut (10) is provided in the suction base plate (1), a cavity (21) is provided in the connecting plate (2), an air nozzle (9) which is connected to the cavity (21) is provided on the connecting plate (2), so that a negative pressure suction section which is connected to the material taking hole (11) is formed in the cavity (21), a part of the rod section of the push rod (81) extends into the cavity (21) to form a suction limit state for the nut (10), and a sealing ring (85) is provided on the rod section of the push rod (81) which extends into the cavity (21).

2. A nut taking and discharging mechanism according to claim 1, characterized in that: The push rod (81) is provided at its end with a connecting section (811) extending into the material taking hole (11) so as to push out the nut (10).

3. A nut taking and discharging mechanism according to claim 1, characterized in that: The push rod assembly (8) is provided with a guide sleeve (82) in a clamped connection inside the push rod positioning plate (4); a limit cavity (822) is provided through the guide sleeve (82) for the push rod (81) to slide; a clamping ring (84) is provided on the rod section of the push rod (81) extending out of the limit cavity (822) so that the push rod (81) moves in the same direction as the guide sleeve (82).

4. A nut taking and discharging mechanism according to claim 3, characterized in that: The guide sleeve (82) has a spring (83) connected to the push rod (81) disposed in its limiting cavity (822).

5. A nut taking and discharging mechanism according to claim 3, characterized in that: The top of the push rod positioning plate (4) is connected to a push rod pressing plate (5), and the push rod pressing plate (5) forms a limiting connection with the guide sleeve (82).

6. A nut taking and discharging mechanism according to claim 1, characterized in that: A cylinder (3) is installed on the top of the connecting plate (2), and the piston rod of the cylinder (3) is connected to the push rod positioning plate (4).

7. A nut taking and discharging mechanism according to claim 1, characterized in that: A guide hole (12) is also provided in the material suction bottom plate (1) so that the material suction bottom plate (1) and the fixture can be fitted together to cut the nut (10).

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