A rivet gun

Abstract

The present invention provides a rivet gun, characterized in that it comprises a first handle, a second handle, a transmission mechanism and a clamping and pulling mechanism, the first handle is fixedly connected to or integrated with a shell body that defines the clamping and pulling mechanism, and the second handle can rotate relative to the first handle around a first fixed axis; the clamping and pulling mechanism comprises a pull rod with a tooth groove; the transmission mechanism comprises a gear member with a gear end that can rotate around the second fixed axis, and the gear end of the gear member is configured to cooperate with the tooth groove of the pull rod; the second handle is connected to the transmission mechanism, and is configured to drive the gear member of the transmission mechanism to rotate when the second handle is rotated and opened relative to the first handle, and the gear member pushes the pull rod forward through the cooperation between the gear end and the tooth groove; when the second handle is rotated and closed relative to the first handle, it drives the gear member of the transmission mechanism to rotate, and the gear end of the gear member pulls the pull rod backward through the cooperation with the tooth groove.

Description

Technical Field

[0001] The invention relates to a hand tool, in particular to a rivet gun. Background Art

[0002] The traditional connecting rod type rivet gun includes a handle and a pull rod. The handle, the pull rod and the connecting rod form a planar connecting rod structure. When in use, the handle is closed to retract the pull rod through the connecting rod, and the pull rod breaks the rivet through the clamping mouth. In this way, when the pull rod is pulled up, it is subjected to the oblique pulling force of the connecting rod. Therefore, in the force, there is a large component of force perpendicular to the pull rod. If the force is uneven, the pull rod will tilt, resulting in poor riveting quality or even failure; in addition, the vertical pull rod component becomes larger, and the parallel pull rod component becomes smaller, so the combined force required to break the same rivet becomes larger, making the manual rivet gun difficult to use. Therefore, there is a need in the prior art to provide a more reliable and labor-saving rivet gun. Summary of the invention

[0003] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a more reliable and labor-saving rivet gun.

[0004] To achieve the above-mentioned purpose, the present invention provides a rivet gun, characterized in that it includes a first handle, a second handle, a transmission mechanism and a clamping and pulling mechanism, the first handle is fixedly connected to or integrated with a shell body that defines the clamping and pulling mechanism, and the second handle can rotate relative to the first handle around a first fixed axis; the clamping and pulling mechanism includes a pull rod with a tooth groove; the transmission mechanism includes a gear member with a gear end that can rotate around a second fixed axis, and the gear end of the gear member is configured to cooperate with the tooth groove of the pull rod; the second handle is connected to the transmission mechanism, and is configured to drive the gear member of the transmission mechanism to rotate when the second handle is rotated and opened relative to the first handle, and the gear member pushes the pull rod forward through the cooperation between the gear end and the tooth groove; when the second handle is rotated and closed relative to the first handle, it drives the gear member of the transmission mechanism to rotate, and the gear end of the gear member pulls the pull rod backward through the cooperation with the tooth groove.

[0005] In one embodiment, the transmission mechanism includes a connecting rod, and the connecting rod is configured to transmit the movement of the second handle to the gear member. Further, the first end of the connecting rod is rotatably connected to the second handle through a first pin, and the second end of the connecting rod is rotatably connected to the tail end of the gear member through a second pin. The second handle, the connecting rod and the gear member are configured to form a double rocker mechanism. The connecting line of the axis of the first fixed shaft, the second fixed shaft, the first pin and the second pin is configured to be a parallelogram.

[0006] In another embodiment, the gear element is formed by stacking multiple pieces.

[0007] In another embodiment, a torsion spring is disposed between the first handle and the second handle.

[0008] In another embodiment, the clamping and pulling mechanism also includes a push rod, a spring, a claw, a limit piece and an introduction head. The claw is arranged in the inner cavity of the limit piece. The claw and the limit piece are provided with mutually matching inclined surfaces. The push rod and the spring are arranged in the inner cavity of the pull rod in sequence. The limit piece is sleeved on the pull rod. The clamping and pulling mechanism is arranged so that when the pull rod is pushed forward, the introduction head abuts against the claw, so that the claw compresses the spring through the push rod, the inclined surfaces disengage from each other, and the claw opens; when the pull rod is pulled backward, under the action of the restoring force of the spring, the push rod pushes the claw to make the inclined surfaces engage with each other, and the claw is tightened under the reaction force of the inclined surfaces.

[0009] In another embodiment, a needle roller or a ball roller is provided between the pull rod and the housing. In other embodiments, the first handle and the second handle are provided with a handle sleeve, and the handle sleeve of the first handle is provided with a protrusion suitable for finger gripping; the first handle and the second handle are also provided with a plurality of spare guide heads of different specifications; and the tails of the first handle and the second handle are also provided with a buckle.

[0010] The beneficial effects of the present invention are as follows: the tooth-type cooperation can achieve a closer linear pulling of the rivet than the connecting rod type; the radial force of the pull rod is reduced, which is more labor-saving; the lever principle is used, and the handle saves effort; the teeth are punched into sheet metal, avoiding the conventional tooth milling process, saving costs.

[0011] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of a rivet gun according to an embodiment of the present invention.

[0013] Figure 2 yes Figure 1 sectional view of .

[0014] Figure 3 yes Figure 1 Schematic diagram of the center tie rod.

[0015] Figure 4 yes Figure 1 Schematic diagram of the gear parts.

[0016] Figure 5 is a schematic diagram of a ball according to an embodiment of the present invention.

[0017] Figure 6 is a schematic diagram of a needle roller according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1 , 2 As shown in FIG. 3 , a rivet gun according to a specific embodiment of the present invention comprises a handle 1 and a handle 2. The first handle 1 is fixedly connected to or integrated with the housing 3 of the gun body, and the handle 2 can rotate relative to the handle 1 around a fixed axis 201 .

[0020] The rivet gun according to the present invention includes a transmission mechanism and a clamping and pulling mechanism. In this embodiment, the transmission mechanism includes a gear member 5 that can rotate around a fixed axis 501, and the gear member 5 has a gear end; the clamping and pulling mechanism includes a pull rod 4, and the pull rod 4 is provided with a tooth groove 401, and the gear end of the gear member 5 cooperates with the tooth groove 401 of the pull rod 4. The opening and closing action of the handle 2 of the rivet gun according to the present invention drives the gear member to rotate, and then transmits it to the pull rod 4 through the cooperation of the gear member and the tooth groove, thereby converting it into a linear motion of the pull rod 4. For those skilled in the art, there are many forms and mechanisms that can realize such transmission, such as a gear mechanism, or a connecting rod mechanism disclosed below, and the present invention does not intend to limit this. In this embodiment, the transmission mechanism includes a connecting rod 51, one end of the connecting rod 51 is rotatably connected to the handle 2 through a pin 202, and the other end is rotatably connected to the gear member 5 through a pin 502. The handle 2, the gear member 5 and the connecting rod 51 actually constitute a double rocker mechanism. In this embodiment, the connecting line between the fixed shaft 201, 501 and the pin shaft 202, 502 forms a parallelogram. In this embodiment, the clamping and pulling mechanism also includes a push rod 44, a spring 45, a claw 43, a limiter 42 and an introduction head 41. The claw 43 is arranged in the inner cavity of the limiter 42, and the claw 43 and the limiter 42 are provided with mutually matching inclined surfaces. The push rod 44 and the spring 45 are arranged in the inner cavity of the pull rod 4 in sequence, and the limiter 42 is sleeved on the pull rod 4. The clamping and pulling mechanism in this embodiment is configured such that when the pull rod 4 is pushed forward, the introduction head 41 abuts against the claw 43, so that the claw 43 compresses the spring 45 through the push rod 44, the inclined surfaces are separated from each other, and the claw 43 opens; when the pull rod 4 is pulled backward, under the action of the restoring force of the spring 45, the push rod 44 pushes the claw 43 to make the inclined surfaces engage with each other, and the claw 43 is tightened under the reaction force of the inclined surfaces.

[0021] like Figure 4 As shown, the gear member 5 in this embodiment is formed by stacking multiple tooth pieces 500 through a pin 503. The tooth piece material is spring steel (65Mn) or carbon steel, and the tooth profile is obtained by fine stamping of sheet metal, avoiding conventional milling processing technology and saving costs. When the tooth profile of the tooth block is small, in order to ensure the strength of the tooth, the tooth block material is preferably spring steel; when the tooth profile of the tooth block is large, conventional carbon steel material can be selected for processing.

[0022] like Figure 5 and 6As shown, in order to ensure that the pull rod 4 can obtain sufficient support without generating large friction during linear reciprocating motion, a ball or needle roller 300 can be set between the pull rod 4 and the shell 3 to achieve rolling friction between the pull rod 4 and the shell 3, reduce the wear between the pull rod 4 and the shell 3, and extend the product life.

[0023] In addition, a torsion spring 6 is provided on the handle 2 at the pin 202, so that the handle 2 has a reset function; a handle sleeve 11 is provided on the handle, and a protrusion 12 suitable for finger grip is provided on the handle sleeve 11 of the handle 1; a plurality of spare guide heads 41 of different specifications are also provided on the handle; and a snap-fit ​​part is also provided on the handle.

[0024] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A rivet gun, characterized in that: It includes a first handle, a second handle, a transmission mechanism and a clamping and pulling mechanism. The first handle is fixedly connected to or integrated with a housing defining the clamping and pulling mechanism, and the second handle can rotate relative to the first handle around a first fixed axis; The clamping and pulling mechanism comprises a pull rod with teeth and grooves; The transmission mechanism comprises a gear member having a gear end which is rotatable about a second fixed axis, wherein the gear end of the gear member is configured to cooperate with the tooth groove of the pull rod; The second handle is connected to the transmission mechanism, and is configured such that when the second handle is rotated and opened relative to the first handle, the gear member of the transmission mechanism is driven to rotate, and the gear member pushes the pull rod forward through the cooperation between the gear end and the tooth groove; when the second handle is rotated and closed relative to the first handle, the gear member of the transmission mechanism is driven to rotate, and the gear end of the gear member pulls the pull rod backward through the cooperation between the gear end and the tooth groove; The transmission mechanism includes a connecting rod, and the connecting rod is configured to transmit the movement of the second handle to the gear member; The first end of the connecting rod is rotatably connected to the second handle through a first pin shaft, and the second end of the connecting rod is rotatably connected to the tail end of the gear member through a second pin shaft.

2. The rivet gun according to claim 1, wherein: The second handle, the connecting rod and the gear member are arranged to form a double rocker mechanism.

3. The rivet gun according to claim 2, wherein: The connecting line of the axis centers of the first fixed axis, the second fixed axis, the first pin axis and the second pin axis is arranged to form a parallelogram.

4. The rivet gun according to claim 1, wherein: The gear member is formed by stacking multiple pieces.

5. The rivet gun according to claim 1, wherein: A torsion spring is arranged between the first handle and the second handle.

6. The rivet gun according to claim 1, wherein: The clamping and pulling mechanism also includes a push rod, a spring, a claw, a limit piece and an introduction head. The claw is arranged in the inner cavity of the limit piece. The claw and the limit piece are provided with mutually matching inclined surfaces. The push rod and the spring are arranged in the inner cavity of the pull rod in sequence. The limit piece is sleeved on the pull rod. The clamping and pulling mechanism is configured so that when the pull rod is pushed forward, the introduction head abuts against the claw, so that the claw compresses the spring through the push rod, the inclined surfaces disengage from each other, and the claw opens; when the pull rod is pulled backward, under the action of the restoring force of the spring, the push rod pushes the claw to make the inclined surfaces engage with each other, and the claw is tightened under the reaction force of the inclined surfaces.

7. The rivet gun according to claim 1, wherein: A needle roller or a ball roller is arranged between the pull rod and the housing.

8. The rivet gun according to claim 1, wherein: The first handle and the second handle are provided with a handle sleeve, and the handle sleeve of the first handle is provided with a protrusion suitable for finger gripping; the first handle and the second handle are also provided with a plurality of spare guide heads of different specifications; the tail of the first handle and the second handle is also provided with a snap-fit ​​piece.

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