Gun head mechanism for riveting device

Abstract

The gun head mechanism comprises a gun head body, a material belt and an ejector rod, the gun head body comprises a first channel arranged in the axial direction of the gun head body in a penetrating mode and a second channel arranged in the radial direction of the gun head body in a penetrating mode, the material belt is arranged in the second channel in a penetrating mode and used for conveying rivets, and the ejector rod is arranged in the first channel in a penetrating mode. The gun head mechanism further comprises a nail guide assembly, the nail guide assembly comprises a connector, a gun nozzle, a pipe sleeve and an elastic piece, the gun nozzle is fixedly connected with the gun head body through the connector, the gun nozzle comprises a body part and an extension part formed by outwards protruding the body part in the radial direction, and the extension part abuts against the riveting face of the product to be riveted. The pipe sleeve is arranged in the gun nozzle, the pipe sleeve is formed by splicing a plurality of arc pieces, and a guide channel coaxially communicating with the first channel is formed in the pipe sleeve; and the elastic piece is hooped on the peripheral surface of the pipe sleeve. The riveting device can solve the problems of rivet overturning and rivet inclining in the riveting process of the riveting device.

Description

TECHNICAL FIELD

[0001] The utility model relates to riveting equipment technical field, especially relate to a gun head mechanism for rivet device. BACKGROUND

[0002] As a commonly used fixed connection mode in mechanical processing, rivet connection has the advantages of low cost, high connection fastening, etc.

[0003] The existing rivet device is easy to turn over in the gun nozzle channel when riveting, which causes the problem of turning over, especially for short nails (4-6mm), the probability of turning over and skewing is very high, which seriously affects the production efficiency. UTILITY MODEL CONTENT

[0004] In view of the deficiency of prior art, the utility model provides a gun head mechanism for rivet device to solve the problem of turning over and skewing of rivet device in the riveting process.

[0005] The utility model realizes the following technical scheme:

[0006] A gun head mechanism for rivet device, including gun head body, material belt and ejector rod, the gun head body includes first channel along the axial direction of the gun head body and second channel along the radial direction of the gun head body, the material belt is set in the second channel for conveying rivet, the ejector rod is set in the first channel, the gun head mechanism further includes rivet guide assembly, the rivet guide assembly includes:

[0007] Connecting head, the connecting head is fixed on the gun head body;

[0008] Gun nozzle, the gun nozzle is fixed on the connecting head, and the gun nozzle includes body part and extension part formed by the body part and outwardly protruding along the radial direction, the extension part abuts on the riveting surface of the product to be riveted;

[0009] Pipe sleeve, the pipe sleeve is arranged in the gun nozzle, the pipe sleeve is formed by a plurality of petal circular arc pieces, and the pipe sleeve is formed with a guide channel coaxially communicated with the first channel;

[0010] Elastic piece, the elastic piece is clamped on the outer circumferential surface of the pipe sleeve.

[0011] Further, the outer circumferential surface of the pipe sleeve is concave and forms an annular groove for mounting the elastic piece.

[0012] Further, the axial section of the gun nozzle is in the shape of a convex.

[0013] Further, the extension part is in the shape of a cylinder.

[0014] Further, the outer diameter d of the extension part is 28-36mm.

[0015] Further, the outer diameter d of the extension part is 32mm.

[0016] Further, the outer peripheral surface of the body part is formed with a flat surface, and the locking member abuts against the flat surface through the connecting head.

[0017] Further, the tube sleeve extends radially outward near the axial end of the connecting head to form a limiting part, one side of the limiting part abuts against the connecting head, and the other side abuts against the end of the body part away from the extension part.

[0018] Further, the inner wall of the connecting head has a first flared opening with a large lower part and a small upper part, the upper end of the tube sleeve has a second flared opening formed on the inner wall, the inner diameter of the bottom end of the first flared opening is smaller than the inner diameter of the top end of the second flared opening, and the second flared opening is formed on the radially inner side of the limiting part.

[0019] Further, a through hole for placing the tube sleeve is formed in the body part, the inner wall forming the through hole is provided with a stepped part, the axial end of the tube sleeve away from the connecting head abuts against the upper end surface of the stepped part, and the lower end surface of the stepped part is coplanar with the abutting surface of the extension part.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] 1. The tube sleeve in the guide pin assembly is spliced by a plurality of arc pieces, the arc pieces provide uniform hoop holding stress on the rivet pushed by the ejector rod, so that the rivet maintains posture balance and does not deviate under the action of the hoop holding stress, the rivet is prevented from turning, tilting or deforming due to uneven stress, and the failure or quality problem caused by the stress problem is reduced.

[0022] 2. By controlling the outer diameter d of the extension part of the gun nozzle to be within 28-36mm, it is ensured that the gun nozzle has a larger contact area with the riveting surface of the product to be riveted, more uniform pressure distribution is achieved, the rivet edge of the riveting surface is prevented from collapsing during riveting, appearance unqualified is avoided, and the quality effect of the riveted product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the gun head mechanism;

[0024] Figure 2 It is a sectional view of the gun head mechanism;

[0025] Figure 3 It is a sectional view of part of the gun head mechanism;

[0026] Figure 4 is an exploded view of the guide pin assembly;

[0027] Figure 5 is a sectional view of the gun nozzle;

[0028] Figure 6 is a structural schematic view of the sleeve.

[0029] 1, gun head body; 10, first channel; 11, second channel; 2, material belt; 20, rivet; 3, ejector rod; 4, guide pin assembly; 40, connecting head; 400, first flared opening; 41, gun nozzle; 410, body part; 412, flat surface; 413, through hole; 414, stepped part; 415, upper end surface; 416, lower end surface; 411, extension part; 417, abutting surface; 42, sleeve; 420, circular arc piece; 421, guide channel; 422, annular groove; 423, limiting part; 424, second flared opening; 43, elastic member; 5, locking member. DETAILED DESCRIPTION

[0030] The utility model technical scheme will be further described in detail below in combination with the preferred embodiments and the drawings. In the description of the utility model, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as limiting the utility model.

[0031] As Figures 1-6As shown, the utility model discloses a gun head mechanism for rivet device, including gun head body 1, material belt 2 and top rod 3, gun head body 1 includes the first passageway 10 who sets up along the axial direction of gun head body 1 and the second passageway 11 who sets up along the radial direction of gun head body 1, material belt 2 is used for conveying rivet 20 and is set in the second passageway 11, and top rod 3 is set in the first passageway 10, and the top end of top rod 3 is connected with the power head (not shown in the drawing) of riveting device. Top rod 3 is driven under the power head, and pushes rivet 20 on material belt 2 to move along the first passageway 10 to riveting position, realizes accurate riveting. Gun head body 1 is made of high-strength material, and durability is ensured. Material belt 2 is designed flexibly, and is convenient for quick replacement, and work efficiency is improved.

[0032] The gun head mechanism further includes a guide pin assembly 4 located at the front end of the gun head body 1 for guiding the rivet 20 to accurately enter the riveting position. The guide pin assembly 4 includes a connecting head 40, a gun nozzle 41, a sleeve 42, and an elastic member 43. The gun nozzle 41 is fixedly connected to the front end of the gun head body 1 through the connecting head 40. The sleeve 42 is arranged in the gun nozzle 41, and the sleeve 42 is formed by splicing a plurality of arc segments 420. The sleeve 42 has a guide channel 421 formed inside and coaxially communicated with the first passageway 10. The elastic member 43 is clamped on the outer circumferential surface of the sleeve 42. The sleeve 42 in the guide pin assembly 4 is formed by splicing a plurality of arc segments 420. The arc segments 420 provide uniform hoop gripping stress for the rivet 20 pushed by the top rod 3, so that the rivet 20 maintains a balanced posture under the action of the hoop gripping stress and does not deviate. This avoids the rivet 20 from turning over, tilting, or deforming due to uneven stress, and reduces faults or quality problems caused by stress problems. The elastic member 43 applies a constant pressure on the outer circumferential surface of the sleeve 42 to ensure that the arc segments 420 are tightly fitted, further optimizing the guiding accuracy of the rivet 20. The overall design not only improves the stability of riveting, but also prolongs the service life of the equipment, and is suitable for high-precision riveting requirements.

[0033] In theory, the more the number of arc segments 420 of the sleeve 42, the more uniform the hoop gripping stress distribution obtained by the outer circumferential surface of the rivet cap of the rivet 20. However, considering the control of production cost, the number of arc segments 420 should not be excessively divided. In actual production, the sleeve 42 is preferably composed of two or three arc segments 420. By optimizing the number of arc segments 420, the stable guidance of the rivet 20 is ensured, and the manufacturing cost is effectively controlled, achieving a balance between performance and economy.

[0034] The outer circumferential surface of the sleeve 42 is concave and has an annular groove 422 for mounting the elastic member 43. The annular groove 422 is designed cleverly to ensure that the elastic member 43 is stably mounted, so that the elastic member 43 can provide continuous and uniform pressure, further optimizing the guiding effect of the sleeve 42 on the rivet 20, and improving the stability and durability of the overall structure.

[0035] The pipe sleeve 42 extends radially outward to form a limiting portion 423 near the axial end of the connector 40, one side of the limiting portion 423 abuts against the connector 40, and the other side abuts against the end of the body portion 410 away from the extending portion 411, which effectively prevents the pipe sleeve 42 from axial displacement during riveting.

[0036] As shown in Figure 3 , the inner wall of the connector 40 has a first flared opening 400 with a large upper part and a small lower part, and the upper end of the pipe sleeve 42 has a second flared opening 424 formed on the inner wall, the inner diameter of the bottom end of the first flared opening 400 is smaller than the inner diameter of the top end of the second flared opening 424, and the second flared opening 424 is formed on the radially inner side of the limiting portion 423. This design cleverly utilizes the size difference of the flared opening, ensuring smooth transition of the rivet 20 when entering the pipe sleeve 42 from the connector 40, avoiding jamming or deflection caused by sudden size change, and further improving the smoothness and accuracy of riveting.

[0037] In this embodiment, referring to Figure 5 , the axial section of the gun nozzle 41 is in the shape of a convex character, which is beneficial to enhance the stability and guidance during riveting, ensuring the best effect of each riveting.

[0038] Specifically, the gun nozzle 41 includes a body portion 410 and an extending portion 411 protruding radially outward from the body portion 410, and the extending portion 411 abuts against the riveting surface of the product to be riveted. By providing the extending portion 411, the gun nozzle 41 can have a larger contact area with the riveting surface of the product to be riveted, achieving more uniform pressure distribution and avoiding collapse of the rivet edge of the riveting surface during riveting, which can cause appearance defects.

[0039] In this embodiment, the extending portion 411 is in the shape of a cylinder, which has a diameter larger than that of the body portion 410, ensuring close fitting with the riveting surface and improving the stability of riveting. The cylindrical design simplifies the manufacturing process, reduces costs, and maintains good mechanical properties, ensuring that it is not easily deformed during long-term use. In addition, the abutting surface 417 of the extending portion 411 is finely polished, which is smooth in surface, avoiding scratching the riveting surface of the product during riveting, and improving the quality of the product to be riveted. Furthermore, the transition area between the body portion 410 and the extending portion 411 and the edge area of the bottom of the extending portion 411 adopt a circular arc transition, which further improves the overall strength and aesthetics of the structure, ensuring the stability of the riveting operation and the perfect appearance of the product.

[0040] In the embodiment, the outer diameter d of the extension part 411 is 28-36 mm. In this size range, the collapse of the riveting surface of the gun nozzle 41 due to excessive pressure on the riveting surface can be avoided, which affects the appearance. Also, the gun nozzle 41 can not exceed the riveting surface of the product to be riveted due to the excessive radial size. In the embodiment, the outer diameter d of the extension part 411 is preferably 32 mm.

[0041] As shown in Figure 4 The outer peripheral surface of the body part 410 is formed with a flat surface 412, and the locking member 5 abuts against the flat surface 412 through the connector 40, so that the locking member 5 and the body part 410 have sufficient contact area to form stable abutment and ensure stable locking.

[0042] As shown in Figure 5 The body part 410 is formed with a through hole 413 for placing the sleeve 42, and the inner wall of the through hole 413 is formed with a stepped part 414. The axial end of the sleeve 42 away from the connector 40 abuts against the upper end surface 415 of the stepped part 414, which cooperates with the limiting part 423 to further prevent the axial displacement of the sleeve 42 during riveting. The lower end surface 416 of the stepped part 414 is coplanar with the abutting surface 417 of the extension part 411, which further expands the contact area between the bottom of the gun nozzle 41 and the riveting surface, prevents the collapse of the rivet edge, affects the riveting effect, and causes the appearance to be unqualified.

[0043] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A gun head mechanism for a rivet device, comprising a gun head body (1), a material belt (2) and a punch rod (3), the gun head body (1) comprising a first channel (10) arranged through in an axial direction of the gun head body (1) and a second channel (11) arranged through in a radial direction of the gun head body (1), the material belt (2) being arranged through the second channel (11) for conveying a rivet (20), the punch rod (3) being arranged through the first channel (10), characterized in that, The gun head mechanism further comprises a nail guide assembly (4), which comprises: a connecting head (40) fixed to the gun head body (1); a gun nozzle (41) fixed to the connecting head (40), wherein the gun nozzle (41) comprises a body part (410) and an extension part (411) protruding radially outward from the body part (410), and the extension part (411) abuts the riveting surface of the product to be riveted; a sleeve (42) arranged in the gun nozzle (41), wherein the sleeve (42) is formed by splicing a plurality of petal-shaped arc pieces (420), and a guide channel (421) coaxially communicating with the first channel (10) is formed in the sleeve (42); a resilient member (43) wrapped around the outer circumferential surface of the sleeve (42).

2. A gun head mechanism for a rivet device according to claim 1, wherein, The outer circumferential surface of the sleeve (42) is concave and forms an annular groove (422) for mounting the resilient member (43).

3. The gun head mechanism for a rivet device according to claim 1, wherein The axial section of the gun nozzle (41) is in the shape of a convex letter.

4. The gun head mechanism for a rivet device of claim 1, wherein, The extension part (411) is in the shape of a cylinder.

5. The gun head mechanism for a rivet device of claim 1, wherein, The outer diameter d of the extension part (411) is 28-36 mm.

6. A gun head mechanism for a rivet device according to claim 5, wherein, The outer diameter d of the extension part (411) is 32 mm.

7. The gun head mechanism for a rivet device of claim 1, wherein, The outer circumferential surface of the body part (410) forms a flat surface (412), and a locking member (5) passes through the connecting head (40) and abuts against the flat surface (412).

8. The gun head mechanism for a rivet device of claim 1, wherein, The sleeve (42) extends radially outward near the axial end of the connecting head (40) to form a limiting part (423), one side of the limiting part (423) abuts against the connecting head (40), and the other side abuts against the end of the body part (410) away from the extension part (411).

9. A gun head mechanism for a rivet device according to claim 8, wherein, The inner wall of the connecting head (40) has a first flared opening (400) with a large upper part and a small lower part, the inner wall of the upper end of the sleeve (42) and the interface with the first flared opening (400) forms a second flared opening (424), the inner diameter of the bottom end of the first flared opening (400) is smaller than the inner diameter of the top end of the second flared opening (424), and the second flared opening (424) is formed radially inward of the limiting part (423).

10. The gun head mechanism for a rivet device of claim 1, wherein, The body part (410) has a through hole (413) for placing the sleeve (42), the inner wall forming the through hole (413) protrudes to form a step part (414), the axial end of the sleeve (42) away from the connecting head (40) abuts against the upper end surface (415) of the step part (414), and the lower end surface (416) of the step part (414) is coplanar with the abutting surface (417) of the extension part (411).

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