An electric nail gun

Abstract

The present invention discloses an electric nail gun, comprising a motor, a reduction device, a transmission mechanism and an actuator; the actuator is configured such that the transmission mechanism first drives a punch to enter a force storage stroke, compresses a spring to store force, and releases the spring after reaching the end of the force storage stroke, so that the punch starts a nailing stroke under the action of the spring, and at the end of the nailing stroke, a firing pin on the punch performs nailing; wherein, an air buffer device is also included, and the air buffer device is configured to perform end buffering on the nailing stroke of the punch; an air buffer cavity is provided in the air buffer device, and the punch moves in the air buffer cavity and is sealed by a buffer sealing ring.

Description

Technical Field

[0001] The invention relates to the field of electric tools, and in particular to an electric nail gun. Background Art

[0002] The working principle of the electric nail gun is that the motor starts to rotate after power is turned on, and the actuator is driven by the reduction device to drive the punch from the lowest point of the stroke to the highest point to compress the spring. When the highest point of the nailing stroke is reached, the restoring force of the spring pushes the punch pin to nail.

[0003] When the spring of an existing electric nail gun is compressed, the spring terminal directly applies force to the rear end of the nail gun housing. After long-term use, the nail gun housing is easily damaged at this location.

[0004] The existing punch is buffered and stopped by a buffer rubber pad at the end of the nailing stroke. The impact of the punch on the rubber pad will generate a large noise every time the nail is struck. In addition, the rubber pad may be damaged under the long-term impact force of the punch, so it needs to be replaced regularly.

[0005] Most of the existing transmission devices are structures of camshafts and sliders that cooperate with each other, and the stroke is relatively small, so long nails cannot be driven. Summary of the invention

[0006] In order to solve the above problems, the present invention provides an electric nail gun, including a motor, a reduction device, a transmission mechanism and an actuator; the actuator is configured to first drive the punch to enter a power storage stroke by the transmission mechanism, compress the spring to store power, and release the spring after reaching the end of the power storage stroke, so that the punch starts a nailing stroke under the action of the spring, and at the end of the nailing stroke, the firing pin on the punch performs nailing; wherein, it also includes an air buffer device, the air buffer device is configured to perform end buffering for the nailing stroke of the punch; an air buffer chamber is provided in the air buffer device, and when the punch is in the air buffer chamber, it is sealed by a buffer sealing ring.

[0007] Furthermore, an outer sleeve is arranged outside the punch, and the punch reciprocates inside the outer sleeve.

[0008] Furthermore, an end cover is arranged at the rear end of the outer sleeve, and the spring is arranged between the punch and the end cover.

[0009] Furthermore, the tail of the punch is cylindrical, and the front end of the spring is accommodated and abuts against the inside of the cylinder.

[0010] Furthermore, the air buffer device is a sleeve mounted on the front end of the outer sleeve.

[0011] Furthermore, an open slot is provided on the outer sleeve, and the fixed connecting piece on the punch extends out of the open slot and is connected to the transmission mechanism.

[0012] Furthermore, a buffer sealing ring is arranged on the air buffer device.

[0013] Furthermore, a buffer sealing ring is arranged on the punch.

[0014] Furthermore, a rubber buffer pad is provided in the air buffer cavity.

[0015] Furthermore, the transmission mechanism includes a sector-shaped sprocket and a roller row matched therewith, the roller row is arranged in the slide groove, and the fixed connection piece is fixedly installed on the roller row.

[0016] The technical effects of the present invention are:

[0017] 1. Air cushioning is used to replace or partially share the cushioning effect of the original rubber cushion, so that the rubber cushion can be eliminated, or the load of the rubber cushion is reduced, its life is increased, and the noise is reduced.

[0018] 2. The spring mechanism is stored in the outer sleeve, and the nail gun shell is no longer directly subjected to force, thus avoiding damage after long-term use.

[0019] 3. The fan-shaped sprocket and roller row are used to replace the camshaft and slider structure to solve the problem that the original stroke is relatively small and cannot drive long nails.

[0020] 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

[0021] Figure 1 It is a schematic diagram of the overall assembly of an electric nail gun in a preferred embodiment of the present invention;

[0022] Figure 2 It is a three-dimensional schematic diagram of a nailing action execution mechanism in a preferred embodiment of the present invention;

[0023] Figure 3 It is a three-dimensional schematic diagram of a nailing action execution mechanism after removing the outer sleeve in a preferred embodiment of the present invention;

[0024] Figure 4 is a cross-sectional schematic diagram of a nailing action execution mechanism in a preferred embodiment of the present invention;

[0025] Figure 5 is a cross-sectional schematic diagram of a nailing action actuator in another preferred embodiment of the present invention;

[0026] Figure 6 is a three-dimensional schematic diagram of a sprocket and a roller row in a preferred embodiment of the present invention;

[0027] Figure 7FIG. 1 is a cross-sectional view of a sprocket and roller row in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following describes several preferred embodiments of the present invention with reference to the drawings in the specification, so that the technical content is clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0029] In such Figure 1 In the electric nail gun shown, a motor 2 is arranged in a housing 1. The motor 2 drives the reduction gear 4 to rotate through the gear shaft 3. The fan-shaped sprocket 5 is coaxial with the reduction gear 4 and cooperates with the roller row 6. The roller row 6 is arranged in the slide groove 7 and can slide back and forth in the slide groove 7. The inner cylinder punch 10 is fixedly mounted on the roller row 6 through the fixed connection 16 and is located above the slide groove 7. Figure 2-3 As shown, an outer sleeve 8 is provided outside the inner cylinder punch 10. An open groove 15 is provided at the bottom of the outer sleeve 8. A fixed connection member 16 can move in the open groove 15. The inner cylinder punch 10 can slide in the outer sleeve 8 driven by the fixed connection member 16. An end cover 12 is installed at the rear end of the outer sleeve 8 through a thread. The spring 13 is arranged in the outer sleeve 8, one end of which is received and abutted against the inner cylinder of the inner cylinder punch 10, and the other end abuts against the inner surface of the end cover 12 of the outer sleeve 8. An air buffer sleeve 9 is installed at the front end of the outer sleeve 8 through a thread. A first buffer seal ring 17 located at the rear and a second buffer seal ring 18 located at the front are provided in the air buffer sleeve 9. The first buffer seal ring 17 and the second buffer seal ring 18 seal the inner cylinder punch 10 in the air buffer cavity 14 of the air buffer sleeve 9, and the inner cylinder punch 10 can move in the air buffer cavity 14.

[0030] like Figure 4As shown, when the motor 2 drives the reduction gear 4 to rotate through the gear shaft 3, the fan-shaped sprocket 5 on the reduction gear 4 rotates accordingly, thereby pushing the roller row 6 to move backward in the slide groove 7 and starting the force storage stroke. The roller row 6 drives the inner cylinder punch 10 to move backward together through the fixed connector 16, and compresses the spring 13 to store force. When the force storage stroke reaches the end point, the fan-shaped sprocket 5 rotates to the toothless position, disengages from the roller row 6, and the spring 13 is released. The restoring force of the spring 13 begins to push the inner cylinder punch 10 to move forward and start the nailing stroke. Due to the effect of the air buffer sleeve 9, the closer the inner cylinder punch 10 is to the end point of the nailing stroke, the greater the resistance of the air in the air buffer chamber 14 to the inner cylinder punch 10, and finally plays a buffering and stopping role like the rubber buffer pad in the prior art. In this embodiment, air buffering is used to completely replace the rubber pad buffering, and the noise of the punch hitting the rubber pad will not be generated during nailing, and there is no need to worry about the service life cycle of the rubber pad. The problem with this implementation is that, when the impact force is large and the punch speed is fast, the air cushion alone may produce a rebound effect.

[0031] Therefore, air and rubber cushions can also be used at the same time. Figure 5 As shown, in this embodiment, a rubber pad 19 is also provided in the air buffer chamber 14. In this way, the impact force of the punch is partially borne by the air buffer, and the rest is still borne by the rubber pad 19, which can reduce the impact noise, increase the life of the rubber pad, and reduce the rebound effect of the air buffer, achieving a better balance.

[0032] In this embodiment, it is installed on the air buffer sleeve to form a seal with the movable punch. In other embodiments, the buffer seal ring can also be installed on the punch, as long as a closed air buffer chamber can be formed. The present invention has no intention of limiting this.

[0033] In the above embodiment, when the spring is compressed, it abuts against the end cover of the outer sleeve and does not contact the outer shell, so the outer shell will not be damaged even if nailing is performed for a long time.

[0034] See also Figure 6-7 In the embodiment according to the present invention, a fan-shaped sprocket 5 is used to replace the conventional camshaft, and a roller row 6 is used to replace the conventional slider. The fan-shaped sprocket 5 has fan-shaped sprocket teeth 20. The roller row 6 is a strip-shaped rigid structure as a whole, and is provided with rollers 21 that cooperate with the fan-shaped sprocket teeth 20. The roller row 6 is connected to the fixed connector 16 through a fixing pin.

[0035] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in the field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An electric nail gun, characterized in that: It includes a motor, a reduction device, a transmission mechanism and an actuator; the actuator is configured to first drive the punch into a power storage stroke by the transmission mechanism, compress the spring to store power, and release the spring after reaching the end of the power storage stroke, so that the punch starts the nailing stroke under the action of the spring, and at the end of the nailing stroke, the firing pin on the punch performs nailing; wherein, the punch is an inner cylinder punch, an outer sleeve is arranged on the outside of the punch, the inner cylinder punch can reciprocate in the outer sleeve, the spring is arranged in the outer sleeve, one end of the spring is accommodated in and abuts against the cylinder of the inner cylinder punch; an air buffer sleeve is installed at the front end of the outer sleeve through a thread; a first buffer sealing ring located at the rear and a second buffer sealing ring located at the front are arranged in the air buffer sleeve; the first buffer sealing ring and the second buffer sealing ring seal the inner cylinder punch in the air buffer cavity of the air buffer sleeve, and the inner cylinder punch can move in the air buffer cavity.

2. The electric nail gun according to claim 1, wherein: An end cover is arranged at the rear end of the outer sleeve, and a spring is arranged between the punch and the end cover.

3. The electric nail gun according to claim 1, wherein: An open slot is arranged on the outer sleeve, and a fixed connecting piece on the punch extends out of the open slot and is connected to the transmission mechanism.

4. The electric nail gun according to claim 1, wherein: A rubber buffer pad is arranged in the air buffer cavity.

5. The electric nail gun according to claim 1, wherein: The transmission mechanism comprises a sector sprocket and a roller row matched therewith, the roller row is arranged in a slide groove, and a fixed connecting piece is fixedly installed on the roller row.

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