A gun head of a rivet gun

Abstract

This utility model discloses a rivet gun head, including a sleeve. The inner cavity of the sleeve has a rivet mechanism and a transmission mechanism arranged sequentially from front to back along its axial direction. A clamping sleeve of the rivet mechanism is slidably disposed within the inner cavity of the sleeve along its axial direction, and its rear end is connected to the transmission mechanism. The inner cavity of the clamping sleeve has claws and a top core arranged sequentially from front to back. The claws are arranged in a ring to form a conical claw structure, with the outer conical surface of the claw structure abutting against the conical surface at the front of the inner cavity of the clamping sleeve. The top core abuts against the mating inclined surface at the rear end of the corresponding claw through its front abutting inclined surface, and a first spring abuts between the rear end of the top core and the transmission mechanism. The abutting inclined surfaces are arranged in a ring to form a prismatic structure, with an edge between adjacent abutting inclined surfaces. The transmission mechanism is adapted to be connected to the driving device of the rivet gun. This utility model effectively constrains the position of each claw, preventing excessive spacing between adjacent claws and effectively avoiding the occurrence of rivet jamming.

Description

Technical Field

[0001] This utility model relates to the field of rivet gun technology, specifically to a rivet gun head. Background Technology

[0002] In the prior art, Chinese patent document CN203887142U describes the structure of an electric rivet gun head. Please refer to [link / reference needed]. Figure 1 As shown, in this gun head structure, the open clamp sleeve (i.e., the top core 4 in this application) abuts against the rear end of the rivet pull head (i.e., the claw 3 in this application) through the conical surface at its front end.

[0003] When the claw 3 engages with the conical surface of the top core 4, the claw 3 rotates around the conical surface of the top core 4. Therefore, the conical surface of the top core 4 cannot precisely position the distribution of the three claws 3 at an angle; that is, the positions of the three claws are unconstrained and prone to change. Specifically, when the distance between two claws 3 is large, when the rivet shank is inserted into the center of the three claws, there is a certain probability that the rivet shank will get stuck between the two claws 3 with the larger distance, resulting in a stuck rivet shank. Frequent stuck rivet shanks and the need to clean them will affect the working efficiency of the rivet gun.

[0004] In summary, the existing rivet gun head cannot effectively constrain the position of the claw plates and cannot effectively control the spacing between adjacent claw plates. Utility Model Content

[0005] This utility model proposes a rivet gun head to solve the technical problem that the existing rivet gun heads cannot effectively constrain the position of the claw pieces and cannot effectively control the spacing between adjacent claw pieces.

[0006] The present invention discloses a rivet gun head, including a sleeve, wherein the inner cavity of the sleeve has a rivet mechanism and a transmission mechanism arranged sequentially from front to back along its axial direction. The riveting mechanism includes a sleeve, which is slidably disposed in the inner cavity of the sleeve along the axial direction of the sleeve, and its rear end is connected to the transmission mechanism; the inner cavity of the sleeve has claws and a top core arranged sequentially from front to back; the claws are arranged in a ring to form a conical claw structure, and the outer conical surface of the claw structure abuts against the conical surface at the front of the inner cavity of the sleeve; the top core abuts against the mating inclined surface at the rear end of the corresponding claw through its front end abutting inclined surface, and a first spring abuts between the rear end of the top core and the transmission mechanism; the abutting inclined surfaces are arranged in a ring to form a prismatic structure, and an edge is provided between two adjacent abutting inclined surfaces; The transmission mechanism is adapted to be connected to the drive device of the rivet gun to drive the rivet mechanism to move. Through the cooperation of the abutting inclined surface, the front part of the inner cavity of the jacket, and the edge, the position of each claw is effectively constrained, preventing the distance between adjacent claws from being too large, effectively avoiding the situation of the rivet rod getting stuck, and improving the working efficiency of the rivet gun.

[0007] Optionally, there are at least three claw plates and at least three abutting inclined surfaces; The angle between the abutting inclined surface and the axial direction of the sleeve is 110° to 130°. The mating inclined surface is parallel to the corresponding abutting inclined surface. This scheme ensures that the top core abuts against the gripper under the action of the first spring, thereby causing the outer conical surface of the gripper structure to abut against the inner cavity of the sleeve. Optionally, there are three claw plates, six abutting inclined surfaces, and six edges. Using the above scheme, the six abutting inclined surfaces form a hexagonal surface, which has a small contact area with the claw plates, thereby reducing friction between the core and the claw plates.

[0008] Optionally, a transition surface is provided between two adjacent abutting inclined surfaces, and the transition surface is a curved surface; The transition surface is located at the outer edge of the front end of the mandrel. By employing this scheme, a transition surface is provided between two adjacent abutting inclined surfaces to reduce the contact area between the mandrel and the claw, thereby reducing friction between them. Optionally, there are three claw plates, six abutting inclined surfaces, and six transition surfaces.

[0009] Optionally, the rear end of the jacket is threadedly connected to the transmission mechanism; A limiting sleeve is provided between the jacket and the transmission mechanism; the limiting sleeve is disposed in the inner cavity of the sleeve; the limiting sleeve is slidably sleeved on the outside of the transmission mechanism along the axial direction of the sleeve; the inner ring of the limiting sleeve is provided with a first anti-rotation surface that cooperates with the front outer wall of the transmission mechanism. The rear end of the clamp is provided with a limiting notch, and the front end of the limiting sleeve is provided with an insertion protrusion that mates with the limiting notch. A second spring abuts against the rear end of the limiting sleeve and the transmission mechanism. This design effectively prevents the threaded connection between the clamp and the push-pull rod sleeve from loosening.

[0010] Optionally, the transmission mechanism includes a push-pull sleeve and a push-pull screw; The push-pull rod sleeve is slidably disposed in the inner cavity of the sleeve along the axial direction of the sleeve via an external hexagonal structure; the front end of the push-pull rod sleeve is connected to the rear end of the clamp, and the rear end of the push-pull rod sleeve is threadedly connected to the front end of the push-pull screw. The first spring abuts between the rear end of the top core and the front end of the push-pull rod sleeve; The rear end of the push-pull screw is rotatably mounted inside the sleeve via a bearing, and the rear end of the push-pull screw is adapted to be connected to the drive device of the rivet gun. This design allows the sleeve to slide.

[0011] Optionally, a third spring is sleeved on the push-pull screw, and the front and rear ends of the third spring abut against the push-pull screw sleeve and the bearing, respectively.

[0012] Optionally, a retaining ring is embedded within the sleeve for engaging the bearing, and the retaining ring is located behind the bearing. This design effectively secures the bearing.

[0013] Optionally, the front end of the sleeve is provided with a plug, and the plug has a through hole for inserting a rivet. With this design, the rivet shank is inserted into the center of the gripper structure through the through hole of the plug.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: By cooperating with the inclined plane, the front of the inner cavity of the jacket, and the edge, the position of each claw is effectively constrained, preventing the gap between two adjacent claws from being too large, effectively avoiding the situation of the rivet rod getting stuck, and improving the working efficiency of the rivet gun. By setting a limiting sleeve between the threaded connection sleeve and the push-pull rod sleeve, the loosening of the threaded connection between the sleeve and the push-pull rod sleeve can be effectively prevented.

[0015] The above description of the disclosed content and the following description of the embodiments are intended to demonstrate and explain the spirit and principle of the present invention, and to provide a further explanation of the scope of the patent application of the present invention. Attached Figure Description

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the top core and the claw plate in the prior art; Figure 2 This is a cross-sectional view of the gun head in this utility model; Figure 3 This is a partial explosion diagram of the gun head in this utility model; Figure 4 This is a schematic diagram (a) of the top core in this utility model; Figure 5 This is a schematic diagram of the claw plate in this utility model; Figure 6 This is a schematic diagram (II) of the top core in this utility model.

[0018] Explanation of icon numbers: 1. Sleeve; 2. Jacket; 201. Limiting notch; 3. Claw plate; 301. Mating bevel; 4. Top core; 401. Abutting bevel; 402. Edge; 403. Transition surface; 5. First spring; 6. Limiting sleeve; 601. First anti-rotation surface; 602. Insertion protrusion; 7. Second spring; 8. Push-pull rod sleeve; 801. External hexagonal structure; 802. Second anti-rotation surface; 9. Push-pull screw; 10. Third spring; 11. Bearing; 12. Snap ring; 13. Plug. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0020] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0021] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0022] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0023] Example 1 This embodiment discloses a rivet gun head. Please refer to [link / reference]. Figures 2-5 As shown, the head of the rivet gun includes a sleeve 1, a rivet mechanism, and a transmission mechanism, all three being coaxially arranged. In this embodiment, the axial direction of the sleeve 1 is front-to-back. The sleeve 1 is a hollow cylindrical body with openings at both ends. The inner cavity of the sleeve 1 is coaxially arranged with the sleeve 1. The rivet mechanism and the transmission mechanism are arranged sequentially from front to back along the axial direction of the inner cavity of the sleeve 1.

[0024] The riveting mechanism includes a sleeve 2, claw plates 3, and a top core 4. The sleeve 2 is a hollow cylindrical body open at both ends. The sleeve 2 is slidably disposed within the inner cavity of the sleeve 1 along its axial direction, and its rear end is connected to a transmission mechanism. The inner cavity of the sleeve 2 contains, from front to back, claw plates 3 and a top core 4. There are at least three claw plates 3, arranged in a conical gripping structure around the axis of the sleeve 1. The sleeve 2, the gripping structure, and the top core 4 are coaxially arranged.

[0025] The outer conical surface of the gripper structure abuts against the conical surface at the front of the inner cavity of the sleeve 2. The top core 4 abuts against the mating inclined surface 301 at the rear end of the corresponding claw 3 via its front abutting inclined surface 401. A first spring 5 abuts against the rear end of the top core 4 and the transmission mechanism. The transmission mechanism is adapted to be connected to the drive device of the rivet gun to drive the rivet mechanism to move along the axial direction of the sleeve 1. Both the abutting inclined surface 401 and the mating inclined surface 301 are inclined surfaces, and the mating inclined surface 301 is parallel to the corresponding abutting inclined surface 401. There are at least three abutting inclined surfaces 401, arranged in a ring around the axis of the sleeve 1 to form a faceted structure, and an edge 402 is provided between adjacent abutting inclined surfaces 401.

[0026] The driving device includes, but is not limited to, a manual driving device or an electric driving device.

[0027] In this embodiment, the driving device is the drive motor in the electric drive device.

[0028] Specifically, the top core 4 abuts against the gripper structure under the action of the first spring 5, thereby causing the outer conical surface of the gripper structure to abut against the inner cavity of the sleeve 2. When the outer conical surface of the gripper structure abuts against the inner cavity of the sleeve 2, the conical surface of the inner cavity of the sleeve 2 limits the outer conical surface of the claw piece 3, so that the claw piece 3 can only rotate around the axis of the sleeve 2. Since both the abutting inclined surface 401 and the mating inclined surface 301 are inclined surfaces, the claw piece 3 can only slide along the abutting inclined surface 401; therefore, when the outer conical surface of the gripper structure abuts against the inner cavity of the sleeve 2, due to the mutual cooperation between the inner cavity of the sleeve 2 and the abutting inclined surface 401, the claw piece 3 cannot rotate around the axis of the sleeve 2, that is, the claw piece 3 cannot rotate freely.

[0029] Furthermore, since there is a ridge 402 between two adjacent abutting inclined surfaces 401, that is, the front end of the top core 4 has a protruding ridge. When the outer conical surface of the gripper structure abuts against the inner cavity of the sleeve 2, if the gripper 3 wants to rotate from the original abutting inclined surface 401 to the adjacent abutting inclined surface 401 via the adjacent ridge 402, the radius of rotation of the gripper 3 around the axis of the sleeve 2 needs to be increased. At this time, since the inner cavity of the sleeve 2 limits the outer conical surface of the gripper 3, the radius of rotation of the gripper 3 cannot be increased, which in turn causes the gripper 3 to be unable to rotate from the original abutting inclined surface 401 to the adjacent abutting inclined surface 401.

[0030] In summary, with the cooperation of the opposing inclined surface 401, the front part of the inner cavity of the sleeve 2, and the edge 402, the position of each claw 3 is effectively constrained, preventing the gap between two adjacent claws 3 from being too large, effectively avoiding the situation of the rivet rod getting stuck, and improving the working efficiency of the rivet gun.

[0031] In this embodiment, the angle between the abutting inclined surface 401 and the axial direction of the sleeve 1 is 110° to 130°. Preferably, the angle between the abutting inclined surface 401 and the axial direction of the sleeve 1 is 120°.

[0032] In this embodiment, there are three claw pieces 3. There are six abutting inclined surfaces 401 and six edges 402. The three claw pieces 3 are distributed on three non-adjacent abutting inclined surfaces 401. The six abutting inclined surfaces 401 form a hexagonal facet. Compared to a triangular facet formed by only three abutting inclined surfaces 401, the contact area between the hexagonal facet and the claw pieces 3 is smaller, thus reducing friction between the core 4 and the claw pieces 3.

[0033] Please see Figures 2-3 As shown, the transmission mechanism includes a push-pull rod sleeve 8 and a push-pull screw 9 from front to back. The push-pull rod sleeve 8 is slidably disposed in the inner cavity of the sleeve 1 along the axial direction of the sleeve 1 via an external hexagonal structure 801. The external hexagonal structure 801 engages with the inner cavity of the sleeve 1 to prevent the push-pull rod sleeve 8 from rotating within the sleeve 1. The front end of the push-pull rod sleeve 8 is connected to the rear end of the clamp 2. The rear end of the push-pull rod sleeve 8 is threadedly connected to the front end of the push-pull screw 9. The rear end of the push-pull screw 9 is rotatably disposed within the sleeve 1 via a bearing 11. The rear end of the push-pull screw 9 is adapted to be connected to the drive device of a rivet gun.

[0034] The push-pull rod sleeve 8 is located behind the top core 4. Specifically, the front end face of the push-pull rod sleeve 8 has a receiving groove. The rear end of the top core 4 extends into the receiving groove. A first spring 5 is sleeved on the rear end of the top core 4, and the front and rear ends of the first spring 5 abut against the rear end faces of the top core 4 and the receiving groove, respectively.

[0035] Furthermore, a third spring 10 is fitted onto the push-pull screw 9. The front and rear ends of the third spring 10 abut against the push-pull rod sleeve 8 and the bearing 11, respectively.

[0036] In this embodiment, in order to effectively fix the bearing 11, a retaining ring 12 for locking the bearing 11 is embedded in the sleeve 1, and the retaining ring 12 is located behind the bearing 11.

[0037] In this embodiment, the front end of the sleeve 1 is provided with a plug 13. The plug 13 has a through hole for inserting a rivet. The through hole is coaxially arranged with the sleeve 1.

[0038] Please see Figures 2-3 As shown, to reduce the difficulty of disassembling and assembling the riveting mechanism and the transmission mechanism, the rear end of the clamp 2 is threadedly connected to the front end of the push-pull rod sleeve 8. To prevent relative rotation between the clamp 2 and the push-pull rod sleeve 8, which could loosen the threaded connection, a limiting sleeve 6 is provided between the clamp 2 and the push-pull rod sleeve 8. Specifically, the limiting sleeve 6 is located in the inner cavity of the sleeve 1. The limiting sleeve 6 is slidably fitted onto the outer front part of the push-pull rod sleeve 8 along the axial direction of the sleeve 1. The inner ring of the limiting sleeve 6 has a first anti-rotation surface 601 that mates with the outer front wall of the push-pull rod sleeve 8. The outer front wall of the push-pull rod sleeve 8 has a second anti-rotation surface 802 that mates with the first anti-rotation surface 601 to prevent the limiting sleeve 6 from rotating. The rear end of the clamp 2 has a limiting notch 201. The front end of the limiting sleeve 6 has an insertion protrusion 602 that mates with the limiting notch 201. A second spring 7 abuts between the rear end of the limiting sleeve 6 and the protruding edge of the push-pull rod sleeve 8.

[0039] Under the action of the second spring 7, the insertion protrusion 602 of the limiting sleeve 6 is inserted into the limiting notch 201. Under the action of the second anti-rotation surface 802, the limiting sleeve 6 cannot rotate relative to the push-pull rod sleeve 8, thereby preventing the clamp 2 from rotating relative to the push-pull rod sleeve 8.

[0040] The working principle of this embodiment: The shank of the rivet is inserted into the center of the clamping structure through the through hole of the plug 13; The driving device of the rivet gun is connected to the rear end of the push-pull screw 9. The driving device drives the push-pull screw 9 to rotate so that the push-pull rod sleeve 8, which is threadedly connected to the push-pull screw 9, slides along the axial direction of the sleeve 1. The push-pull rod sleeve 8 drives the clamp 2, the claw 3 and the top core 4 to slide along the axial direction of the sleeve 1. The claw structure drives the rivet shank to move linearly, thereby realizing the rivet action of the gun head.

[0041] This embodiment effectively constrains the position of each claw piece by using the cooperation of the abutting inclined surface, the front part of the inner cavity of the jacket, and the edge, preventing the gap between adjacent claw pieces from being too large, effectively avoiding the situation of the rivet rod getting stuck, and improving the working efficiency of the rivet gun; by setting a limiting sleeve between the threaded jacket and the push-pull rod sleeve, it effectively prevents the threaded connection between the jacket and the push-pull rod sleeve from loosening.

[0042] Example 2 The difference between this embodiment and Embodiment 1 is that, please refer to... Figure 6 As shown, in this embodiment, a transition surface 403 is also provided between two adjacent abutting inclined surfaces 401 to reduce the contact area between the top core 4 and the claw plate 3.

[0043] Specifically, the transition surface 403 is a curved surface. The transition surface 403 is located at the outer edge of the front end of the top core 4.

[0044] In this embodiment, there are three claw plates 3, six abutting inclined surfaces 401, and six transition surfaces 403.

[0045] This embodiment reduces the contact area between the core and the claw by setting a transition surface between two adjacent abutting inclined surfaces, thereby reducing the friction between the core and the claw.

[0046] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A rivet gun head, characterized in that, Includes a sleeve (1), the inner cavity of which has a riveting mechanism and a transmission mechanism in sequence from front to back along its axial direction; The riveting mechanism includes a sleeve (2), which is slidably disposed in the inner cavity of the sleeve (1) along the axial direction of the sleeve (1), and its rear end is connected to the transmission mechanism; the inner cavity of the sleeve (2) has claws (3) and a top core (4) in sequence from front to back; the claws (3) are arranged in a ring to form a conical claw structure, and the outer conical surface of the claw structure abuts against the conical surface at the front of the inner cavity of the sleeve (2); the top core (4) abuts against the mating inclined surface (301) at the rear end of the corresponding claw (3) through its front end abutting inclined surface (401), and a first spring (5) abuts between the rear end of the top core (4) and the transmission mechanism; the abutting inclined surfaces (401) are arranged in a ring to form a prismatic structure, and an edge (402) is provided between two adjacent abutting inclined surfaces (401). The transmission mechanism is adapted to be connected to the drive device of the rivet gun to drive the rivet mechanism to move.

2. The head of the rivet gun according to claim 1, characterized in that, The claws (3) are at least three in number, and the abutting inclined surfaces (401) are at least three in number; The angle between the abutting inclined surface (401) and the axial direction of the sleeve (1) is 110° to 130°; The mating inclined surface (301) is parallel to the corresponding abutting inclined surface (401).

3. The head of the rivet gun according to claim 2, characterized in that, There are three claw plates (3), six opposing inclined surfaces (401), and six edges (402).

4. The head of the rivet gun according to claim 1, characterized in that, A transition surface (403) is provided between two adjacent abutting inclined surfaces (401), and the transition surface (403) is a curved surface; The transition surface (403) is located at the outer edge of the front end of the top core (4).

5. The head of the rivet gun according to claim 4, characterized in that, There are three claw plates (3), six opposing inclined surfaces (401), and six transition surfaces (403).

6. The head of the rivet gun according to claim 1, characterized in that, The rear end of the sleeve (2) is threadedly connected to the transmission mechanism; A limiting sleeve (6) is provided between the jacket (2) and the transmission mechanism; the limiting sleeve (6) is disposed in the inner cavity of the sleeve (1); the limiting sleeve (6) is slidably sleeved on the outside of the transmission mechanism along the axial direction of the sleeve (1); the inner ring of the limiting sleeve (6) is provided with a first anti-rotation surface (601) that cooperates with the front outer wall of the transmission mechanism. The rear end of the sleeve (2) is provided with a limiting notch (201), the front end of the limiting sleeve (6) is provided with an insertion protrusion (602) that cooperates with the limiting notch (201), and the rear end of the limiting sleeve (6) is abutted against the transmission mechanism by a second spring (7).

7. The head of the rivet gun according to claim 1, characterized in that, The transmission mechanism includes a push-pull sleeve (8) and a push-pull screw (9); The push-pull rod sleeve (8) is slidably disposed in the inner cavity of the sleeve (1) along the axial direction of the sleeve (1) by means of an external hexagonal structure (801); the front end of the push-pull rod sleeve (8) is connected to the rear end of the clip (2), and the rear end of the push-pull rod sleeve (8) is threadedly connected to the front end of the push-pull screw (9). The first spring (5) abuts between the rear end of the top core (4) and the front end of the push-pull rod sleeve (8). The rear end of the push-pull screw (9) is rotatably disposed in the sleeve (1) via a bearing (11), and the rear end of the push-pull screw (9) is adapted to be connected to the drive device of the rivet gun.

8. The head of the rivet gun according to claim 7, characterized in that, A third spring (10) is sleeved on the push-pull screw (9), and the front and rear ends of the third spring (10) abut against the push-pull rod sleeve (8) and the bearing (11) respectively.

9. The head of the rivet gun according to claim 7, characterized in that, The sleeve (1) is fitted with a retaining ring (12) for engaging the bearing (11), and the retaining ring (12) is located behind the bearing (11).

10. The head of the rivet gun according to claim 1, characterized in that, The sleeve (1) is provided with a plug (13) at the front end, and the plug (13) has a through hole for inserting a rivet.

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