Claw sleeve anti-loosening structure for riveting gun and riveting gun

Abstract

The claw sleeve anti-loosening structure for the riveting gun comprises a connecting shaft and a claw sleeve, external threads are arranged on the front end portion of the connecting shaft / the rear end portion of the claw sleeve, internal threads are arranged on the rear end portion of the claw sleeve / the front end portion of the connecting shaft, and the front end of the connecting shaft is connected with the rear end of the claw sleeve through the threads. A press-in type ball plunger and a limiting hole matched with the press-in type ball plunger are arranged at the connecting position of the connecting shaft and the claw sleeve. According to the scheme, the press-in type ball head plunger and the limiting hole are additionally arranged, the connecting shaft and the claw sleeve are prevented from loosening through the limiting function of the press-in type ball head plunger, circulation can be achieved, and the anti-loosening effect is achieved to the maximum extent; therefore, the possibility that the gun head assembly is damaged due to some misoperation is reduced, meanwhile, the period that the gun head assembly needs to be checked regularly / quantitatively can be prolonged, and the use efficiency of the gun head assembly is improved.

Description

Technical Field

[0001] The utility model relates to the field of rivet guns, in particular to an anti-loosening structure for a claw sleeve of a rivet gun and a rivet gun. Background Art

[0002] In the connection mode between the connecting shaft and the claw sleeve in the gun head assembly of the current market riveting power tool, a threaded connection mode is used for assembly. After tightening, it reaches a locked state. During the actual riveting process, a large force is generated during riveting, resulting in vibration. After using for a period of time, the connection between the threads will become loose. The more times it is used, the larger the size of the looseness will be, which will cause interference with the anvil, resulting in jamming of the machine and inability to use it normally; the service life of the supporting parts is reduced, and even the supporting parts can be directly damaged.

[0003] Currently in the market, there is another structure, that is, a groove is provided at the bottom end of the external thread of the connecting shaft, and an elastic ring is placed in the groove. The connection mode between the connecting shaft and the claw sleeve uses a threaded connection mode for assembly. After tightening, it reaches a locked state. During the actual riveting process, the elastic ring is squeezed and deformed, seriously worn, and easily broken. When reaching a certain number, the connection between the threads will still become loose. The more times it is used, the larger the size of the looseness will be, until it causes overfitting with the inner wall of the anvil and results in jamming, the machine cannot be used normally, the service life of the parts is reduced, and even the parts can be directly damaged. Therefore, during the use of the riveting power tool, it is necessary to regularly / quantitatively and frequently check the gun head assembly. Compared with the above structure without an elastic ring, the service life of this structure has a certain improvement, but it still cannot completely solve the problem of loosening of the connecting parts.

[0004] Therefore, how to solve the problem of loosening of the claw sleeve and extend the service life of the parts is an urgent problem to be solved at present. Summary of the Invention

[0005] For this purpose, it is necessary to provide an anti-loosening structure for a claw sleeve of a rivet gun and a rivet gun, which further limits the connecting shaft and the claw sleeve by setting a press-in ball plunger, so that the connecting shaft and the claw sleeve are not easily loosened, thereby extending the service life of the parts.

[0006] To achieve the above object, the inventor provides an anti-loosening structure for a claw sleeve of a rivet gun, including: a connecting shaft and a claw sleeve. The front end of the connecting shaft / the rear end of the claw sleeve is provided with an external thread, and the rear end of the claw sleeve / the front end of the connecting shaft is provided with an internal thread. The front end of the connecting shaft is threadedly connected to the rear end of the claw sleeve; a press-in ball plunger is provided at the connection between the connecting shaft and the claw sleeve, and a limiting hole adapted to the press-in ball plunger.

[0007] As a preferred structure of the utility model, the press-in ball plunger is arranged at the front end of the connecting shaft / the rear end of the claw sleeve, and the limiting hole is correspondingly arranged at the rear end of the claw sleeve / the front end of the connecting shaft.

[0008] As a preferred structure of the present utility model, an installation hole is provided at the front end of the connecting shaft provided with a press-in ball head plunger / at the rear end of the claw sleeve. The press-in ball head plunger is arranged in the installation hole, and the ball head of the press-in ball head plunger protrudes from the installation hole.

[0009] As a preferred structure of the present utility model, the press-in ball head plunger is arranged in the non-threaded area at the front end of the connecting shaft / at the rear end of the claw sleeve, and the limiting hole is arranged in the non-threaded area at the rear end of the claw sleeve / at the front end of the connecting shaft.

[0010] As a preferred structure of the present utility model, at least two press-in ball head plungers are provided. Two or more press-in ball head plungers are evenly distributed around the axis of the connecting shaft / claw sleeve, and the number and setting position of the limiting holes correspond to those of the press-in ball head plungers.

[0011] As a preferred structure of the present utility model, a groove is provided in the middle of the external thread area, and an elastic ring is arranged in the groove.

[0012] To achieve the above object, the inventor also provides a rivet gun, including: a transmission mechanism, a riveting mechanism and a clamping jaw, and further including the anti-loosening structure for the claw sleeve of the rivet gun according to any one of the above invention contents. The transmission mechanism is in transmission connection with the riveting mechanism, the riveting mechanism is connected with the connecting shaft, the connecting shaft is in threaded connection with the claw sleeve, and the clamping jaw is arranged at the front end of the connecting shaft and sleeved in the claw sleeve.

[0013] Different from the prior art, the beneficial effects achieved by the above technical solutions are as follows:

[0014] In this solution, in addition to using internal / external thread assembly connection between the connecting shaft and the claw sleeve, a press-in ball head plunger and a limiting hole for the ball head are added, which greatly reduces the looseness generated during riveting. If loosening occurs, the limiting function of the press-in ball head plunger can prevent further loosening, and this can be repeated to achieve the maximum anti-loosening effect; thus reducing the possibility of damage to the gun head assembly caused by certain misoperations, and at the same time, the cycle for regularly / quantitatively checking the gun head assembly can be extended, increasing the service efficiency of the gun head assembly; in addition, in this solution, the elastic ring is arranged in the middle of the external thread area, which not only avoids the situation that the elastic ring is squeezed and damaged when arranged at the bottom or front end of the external thread, but also can effectively generate a damping force to play a buffering role when vibration and force are generated at the moment of nail breakage. This structure can effectively extend the service life of the elastic ring. Description of the Drawings

[0015] Figure 1 Schematic diagram of the anti-loosening structure for the claw sleeve of the rivet gun described in the specific implementation manner;

[0016] Figure 2Stereogram of the anti-loosening structure of the claw sleeve for a rivet gun described in the specific implementation manner;

[0017] Figure 3 Exploded view of the anti-loosening structure of the claw sleeve for a rivet gun described in the specific implementation manner;

[0018] Figure 4 Partial structure cross-sectional view of the rivet gun described in the specific implementation manner.

[0019] Explanation of reference numerals:

[0020] 101, connecting shaft; 102, claw sleeve; 103, external thread; 104, internal thread; 105, press-in ball head plunger; 106, limit hole; 107, mounting hole; 108, groove; 109, elastic ring; 201, riveting mechanism; 202, clamping jaw. Specific implementation manner

[0021] To explain in detail the technical content, structural features, achieved objectives and effects of the technical solution, the following is described in detail with specific embodiments in conjunction with the accompanying drawings.

[0022] As Figures 1 to 3 shown, this embodiment provides an anti-loosening structure for a claw sleeve of a rivet gun, including: a connecting shaft 101 and a claw sleeve 102. An external thread 103 is provided at the front end of the connecting shaft 101 / the rear end of the claw sleeve 102, and an internal thread 104 is provided at the rear end of the claw sleeve 102 / the front end of the connecting shaft 101. The front end of the connecting shaft 101 is threadedly connected to the rear end of the claw sleeve 102. A press-in ball head plunger 105 is provided at the connection between the connecting shaft and the claw sleeve, and a limit hole 106 adapted to the press-in ball head plunger.

[0023] In the above embodiment, when the external thread 103 is provided at the front end of the connecting shaft 101, the internal thread 104 is correspondingly provided at the rear end of the claw sleeve 102; when the external thread 103 is provided at the rear end of the claw sleeve 102, the internal thread 104 is correspondingly provided at the front end of the connecting shaft 101; as Figure 2 and Figure 3 shown, in this embodiment, the external thread 103 is provided at the front end of the connecting shaft 101, and the internal thread 104 is provided at the rear end of the claw sleeve 102.

[0024] In the above embodiment, the press-in ball head plunger 105 can be provided at the front end of the connecting shaft / the rear end of the claw sleeve, and the limit hole 106 is correspondingly provided at the rear end of the claw sleeve / the front end of the connecting shaft. As Figure 3 shown, in this embodiment, the press-in ball head plunger 105 is provided at the front end of the connecting shaft, and the limit hole 106 is correspondingly provided at the rear end of the claw sleeve.

[0025] In the above embodiments, in order to facilitate the setting of the press-in ball head plunger 105, a mounting hole 107 is provided at the front end of the connecting shaft / the rear end of the claw sleeve. The press-in ball head plunger 105 is arranged in the mounting hole 107, and the ball head of the press-in ball head plunger protrudes from the mounting hole. In this way, the ball head can be engaged with the limiting hole, and under the action of a large force, the ball head can retract into the plunger, so that the ball head can be re-engaged and fixed after being displaced.

[0026] In some embodiments, the press-in ball head plunger 105 is arranged in the non-threaded area at the front end of the connecting shaft / the rear end of the claw sleeve, and the limiting hole 106 is arranged in the non-threaded area at the rear end of the claw sleeve / the front end of the connecting shaft. As Figure 2 and Figure 3 shown, in this embodiment, the press-in ball head plunger 105 is arranged in the non-threaded area at the rear of the external thread provided at the front end of the connecting shaft; the limiting hole 106 is arranged in the non-threaded area at the front of the internal thread provided at the rear end of the claw sleeve. In this way, damage to the ball head during the rotation of the thread can be avoided, and the connecting shaft 101 and the claw sleeve 102 can be better fitted.

[0027] In certain embodiments, there are at least two press-in ball head plungers 105, and two or more press-in ball head plungers are evenly distributed around the axis of the connecting shaft / claw sleeve. The number and setting position of the limiting holes 106 are correspondingly set with the press-in ball head plungers. As Figure 2 and Figure 3 shown, there are two press-in ball head plungers 105, which are symmetrically arranged at the front end of the connecting shaft 101, and the limiting holes 106 are correspondingly arranged at the rear end of the claw sleeve, with four evenly distributed. That is, the number of the limiting holes 106 corresponding to the press-in ball head plungers 105 means that the number of the limiting holes 106 is not less than the number of the press-in ball head plungers. The setting position of the limiting holes corresponding to the press-in ball head plungers means that the setting position of the limiting holes can make the press-in ball head plungers just fit into the limiting holes after the connecting shaft and the claw sleeve are connected.

[0028] As Figure 2 and Figure 3 shown, in this embodiment, a groove 108 is provided in the middle of the external thread area, and an elastic ring 109 is arranged in the groove. When the rivet gun performs riveting work, when the rivet is pulled off and continues to move backward and then forward in a reciprocating motion, the threaded connection between the connecting shaft and the claw sleeve will gradually loosen under the vibration and large force generated during the forward and backward movement and the pulling off of the rivet. When loosening, an elastic ring, such as an O-ring rubber ring, is built into the thread of the connecting shaft, which plays a buffering and damping role for the thread of the claw sleeve and slows down the loosening dimension; and setting the groove and the elastic ring in the middle of the thread area can effectively reduce the extrusion of the elastic ring by the end parts when the connecting shaft and the claw sleeve are fitted, causing damage and reducing the performance of the elastic ring.

[0029] As Figure 4 shown, in this embodiment, a rivet gun is further provided, which includes a transmission mechanism, a riveting mechanism 201 and a jaw 202, and also includes the anti-loosening structure for the jaw sleeve of the rivet gun described in any one of the above embodiments. The transmission mechanism is in transmission connection with the riveting mechanism 201. The riveting mechanism 201 is connected to a connecting shaft 101. The connecting shaft 101 is in threaded connection with a jaw sleeve 102. The jaw 202 is arranged at the front end of the connecting shaft 101 and is sleeved inside the jaw sleeve 102. In this embodiment, the driving mechanism of the rivet gun can be an in-built motor or an external motor. The transmission mechanism is arranged inside the cavity of the rivet gun, is in transmission connection with the driving mechanism, and is in transmission connection with the riveting mechanism to drive the riveting mechanism to perform reciprocating motion to realize the riveting operation.

[0030] In the specific implementation process of the above embodiment, when the rivet gun is performing riveting work, after the rivet is pulled off, it continuously runs backward, and then in the process of reciprocating forward and backward, the threaded connection between the connecting shaft and the jaw sleeve will generate vibration and large acting forces during the backward and forward running and when pulling off the rivet, and gradually loosen. When loosening, the elastic ring built into the thread of the connecting shaft plays a buffering and damping role for the thread of the jaw sleeve, slowing down the loosening dimension. However, when the rivet gun performs riveting work to reach a certain quantity or continuously works for a certain period of time, the jaw sleeve and the connecting shaft will still loosen. At this time, the ball steel bead of the press-in type ball head plunger is stuck in the limit hole at the tail end of the jaw sleeve, restricting the possibility of further loosening of the jaw sleeve. The ball steel bead of the press-in type ball head plunger is elastic. Assuming that due to an extremely huge acting force or other reasons, the steel bead slides out of the limit hole, at this time, the elastic ring built into the thread of the connecting shaft still plays a buffering and damping role for the thread of the jaw sleeve. When the rivet gun performs riveting work to reach a certain quantity or continuously works for a certain period of time, it gradually loosens. When the jaw sleeve loosens and rotates counterclockwise by a certain angle, the ball steel bead of the press-in type ball head plunger will slide into the next limit hole again, playing a limiting role again, and so on in a cycle.

[0031] It should be noted that although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, any changes and modifications made to the embodiments described in this article, or equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, and directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A loosening prevention structure for a claw sleeve of a rivet gun, comprising: A connecting shaft and a claw sleeve, an external thread is provided at the front end of the connecting shaft / the rear end of the claw sleeve, an internal thread is provided at the rear end of the claw sleeve / the front end of the connecting shaft, and the front end of the connecting shaft is threadedly connected to the rear end of the claw sleeve; characterized in that, a press-in ball plunger is provided at the connection between the connecting shaft and the claw sleeve, and a limiting hole adapted to the press-in ball plunger.

2. The anti-loosening structure of the claw sleeve for a rivet gun according to claim 1, characterized in that: The press-in ball plunger is provided at the front end of the connecting shaft / the rear end of the claw sleeve, and the limiting hole is correspondingly provided at the rear end of the claw sleeve / the front end of the connecting shaft.

3. The anti-loosening structure of the claw sleeve for a rivet gun according to claim 2, characterized in that: The front end of the connecting shaft / the rear end of the claw sleeve provided with the press-in ball plunger is provided with a mounting hole, the press-in ball plunger is arranged in the mounting hole, and the ball head of the press-in ball plunger protrudes from the mounting hole.

4. The anti-loosening structure of the claw sleeve for a rivet gun according to claim 2, characterized in that: The press-in ball plunger is arranged in the non-threaded area at the front end of the connecting shaft / the rear end of the claw sleeve, and the limiting hole is arranged in the non-threaded area at the rear end of the claw sleeve / the front end of the connecting shaft.

5. The anti-loosening structure of the claw sleeve for a rivet gun according to claim 1, wherein: At least two press-in ball plungers are provided, and two or more press-in ball plungers are evenly arranged around the axis of the connecting shaft / the claw sleeve, and the number and arrangement position of the limiting holes correspond to those of the press-in ball plungers.

6. The anti-loosening structure of the claw sleeve for a rivet gun according to any one of claims 1 to 5, characterized in that: A groove is provided in the middle of the external thread area, and an elastic ring is provided in the groove.

7. A rivet gun, comprising: A transmission mechanism, a riveting mechanism and a clamping jaw, characterized in that: it further includes the anti-loosening structure of the claw sleeve for a rivet gun according to any one of claims 1 to 6 above, the transmission mechanism is in transmission connection with the riveting mechanism, the riveting mechanism is connected to the connecting shaft, the connecting shaft is threadedly connected to the claw sleeve, and the clamping jaw is arranged at the front end of the connecting shaft and sleeved in the claw sleeve.

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