Nailing machine

Abstract

The invention relates to a nailing machine which comprises a closed first air cylinder and a closed second air cylinder arranged outside the first air cylinder, and a working cavity of the first air cylinder is communicated with a working cavity of the second air cylinder. A first piston is arranged in the first air cylinder, a firing pin is fixedly connected to the first piston, and a limiting part is arranged on the firing pin; the nailing machine further comprises a latch mechanism, the latch mechanism comprises a latch arm, a transmission shaft and a swing rod arm, the latch arm is connected to the upper portion of the transmission shaft, the swing rod arm is connected to the lower portion of the transmission shaft, and at least one of the latch arm and the swing rod arm is connected with the transmission shaft in a limited rotation mode. According to the nailing machine, the specific latch mechanism is adopted as a braking mechanism, limited rotation design with a buffering function and an elastic component are adopted, and the problems that due to the fact that a crank arm connected with the motor assembly rigidly impacts a braking piece, all connecting pieces are rapidly abraded and loosened can be partially solved.

Description

Technical Field

[0001] This invention belongs to the field of mechanical manufacturing technology and relates to a nailing device, specifically a nailing machine. Background Technology

[0002] A nail gun, also known as a nail drive, includes electric nail guns, pneumatic nail guns, gas nail guns, and manual nail guns. Pneumatic nail guns, also called pneumatic nailers, mostly use an air pump to generate high-pressure gas, which drives a firing pin in the nail gun cylinder to hammer the nails in the nail clip or eject the nails. Typically, the nail gun body consists of the gun body, cylinder, balance valve, switch assembly, firing pin assembly, nozzle, and magazine. Utilizing the pressure difference between compressed air and atmospheric pressure, the firing pin reciprocates within the cylinder via a trigger switch. The magazine consists of the head, cover, fixed magazine, and movable magazine. A compression or tension spring feeds the nail into the magazine slot, and when the firing pin exits the nozzle, the nail is ejected.

[0003] Electric nail drivers use compressed air as power, which drives a firing pin to strike nails and other fasteners. To allow the gas to better store energy and ensure that the compressed gas reaches a certain pressure before activating the firing pin to strike the nail, thus guaranteeing a powerful and effective nail strike, a braking mechanism is typically installed on the nail driver.

[0004] In existing braking mechanisms, the crank arm hard impact braking mechanism connected to the motor assembly has no buffering effect. Under actual high-intensity working conditions, it will not only cause rapid wear between the two, but also cause rapid wear and loosening of the connecting parts of the braking mechanism, ultimately leading to serious consequences such as brake failure.

[0005] Therefore, there is a need to provide a nailing machine to at least partially solve the above problems. Summary of the Invention

[0006] This invention provides a nailing machine that uses a specific latching mechanism as a braking mechanism. It incorporates a limited rotation design with a buffering effect and elastic components, which can partially solve the problems of rapid wear and loosening between connecting parts caused by the hard impact of the crank arm on the braking mechanism.

[0007] According to one aspect of the present invention, a nailing machine is provided, the nailing machine comprising a closed first cylinder and a second cylinder disposed outside the first cylinder and closed, the working chambers of the first cylinder and the second cylinder being in communication with each other; a first piston is provided inside the first cylinder and a striking pin is fixedly connected to the first piston, the striking pin being provided with a limiting part;

[0008] The nailing machine also includes a latching mechanism, which includes a latching arm, a drive shaft, and a rocker arm. The latching arm is connected to the upper part of the drive shaft, and the rocker arm is connected to the lower part of the drive shaft. At least one of the latching arm and the rocker arm is rotatably connected to the drive shaft.

[0009] The second cylinder is equipped with a second piston, which is driven by a motor assembly to reciprocate between a first position and a second position. When the second piston is near the first position, the first piston moves inward and is engaged by the latch arm on the limiting part of the firing pin. When the second piston is near the second position, the motor assembly drives the rocker arm to rotate to a certain angle and then drives the latch arm to disengage from the limiting part.

[0010] In one embodiment, the upper and / or lower part of the drive shaft is provided with a protruding key, the latch arm and / or rocker arm is provided with a key groove for accommodating the key, and the size of the key groove is larger than the key, so that the key can rotate a certain angle in the key groove.

[0011] In one embodiment, the upper and / or lower part of the drive shaft is provided with a flat part, and the latch arm and / or rocker arm is provided with a flat part groove to accommodate the flat part, and the size of the flat part groove is larger than the flat part, so that the flat part can rotate a certain angle in the flat part groove.

[0012] In one embodiment, the lower part of the drive shaft axially limits the rocker arm on the drive shaft via a bushing.

[0013] In one embodiment, the angle is 5 to 30 degrees, preferably 5 to 20 degrees, and more preferably 10 degrees.

[0014] In one embodiment, an elastic element is connected to the rocker arm, which can apply pressure to the rocker arm and transmit it to the latch arm via a drive shaft, so that the end of the latch arm abuts against the side wall of the firing pin.

[0015] In one embodiment, the nailing machine further includes a housing, on which the elastic element is disposed.

[0016] In one embodiment, the end of the latching arm is provided with a latching pin for engaging with the limiting portion of the firing pin.

[0017] In one embodiment, the latch arm is configured as a double-layer structure capable of accommodating the sidewall of the firing pin.

[0018] In one embodiment, the firing pin is a long strip-shaped plate, and the limiting part is a protrusion or groove formed on the side wall of the firing pin.

[0019] In one embodiment, the sidewall of the protrusion or groove includes a stop surface and a transition surface, the stop surface being perpendicular to or at an angle to the length direction of the firing pin, and the transition surface extending from the sidewall of the firing pin to the stop surface.

[0020] In one embodiment, the transition surface is an arc surface or an inclined plane structure; or, the transition surface is a plane parallel to the length direction of the firing pin combined with the arc surface structure or the inclined plane structure.

[0021] In one embodiment, the motor assembly includes a motor and a transmission assembly. The motor is a DC motor, and a crank arm that can rotate circumferentially about the output shaft axis is fixedly connected to the output shaft of the DC motor. One end of the crank arm is provided with a crank pin for driving the rocker arm to rotate, and the other end of the crank arm is pivotally connected to a connecting rod that is connected to the second piston.

[0022] According to another aspect of the present invention, another nailing machine is provided, the nailing machine comprising a closed first cylinder and a second cylinder disposed outside the first cylinder and closed, the working chamber of the first cylinder and the working chamber of the second cylinder being in communication with each other; a first piston is provided inside the first cylinder and a firing pin is fixedly connected to the first piston, the firing pin being provided with a limiting part;

[0023] The nailing machine also includes a second latching mechanism, which includes a second latching arm, a second drive shaft, and a second swing arm. The second latching arm is fixedly connected to the upper part of the second drive shaft, and the second swing arm is fixedly connected to the lower part of the drive shaft.

[0024] The second cylinder is equipped with a second piston, which is driven by a motor assembly to reciprocate between a first position and a second position. When the second piston is near the first position, the first piston moves inward and is engaged by the latching arm two on the limiting part of the firing pin. When the second piston is near the second position, the motor assembly drives the rocker arm two, the transmission shaft two, and the latching arm two to move away from the firing pin along a direction perpendicular to or at a certain angle to the length of the firing pin, thereby causing the latching arm two to disengage from the limiting part. The latching arm two is connected to a compression element, which enables the end of the latching arm two to abut against the side wall of the firing pin.

[0025] In one embodiment, the latch arm 2 moves along an upper track, which is perpendicular to or at an angle to the length direction of the firing pin; the bottom of the drive shaft 2 moves along a lower track, which is parallel to the upper track. Attached Figure Description

[0026] To better understand the above and other objects, features, advantages, and functions of the present invention, reference can be made to the preferred embodiments shown in the accompanying drawings. The same reference numerals in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of the invention and do not limit the scope of the invention in any way; the parts in the drawings are not drawn to scale.

[0027] Figure 1 This is a schematic diagram of the connection structure of the latching mechanism according to the present invention (when the firing pin is ejected);

[0028] Figure 2 This is a schematic diagram of the connection structure of the latching mechanism according to the present invention (when the striking pin is engaged with the latching mechanism);

[0029] Figure 3 This is a partially enlarged structural schematic diagram of the latching mechanism according to the present invention;

[0030] Figure 4 This is a partially enlarged structural diagram (disassembled) of the latching mechanism according to the present invention;

[0031] Figure 5 This is a schematic diagram of the relationship between the rocker arm and the key according to the present invention;

[0032] Figure 6 This is a partially enlarged schematic diagram of another latching mechanism according to the present invention;

[0033] Figure 7 This is a partially enlarged structural diagram (disassembled) of another latching mechanism according to the present invention;

[0034] Figure 8 A schematic diagram of the connection structure of the latching mechanism according to the present invention (showing the location of the elastic element);

[0035] Figure 9 This is a schematic diagram of the connection structure of another latching mechanism according to the present invention (when the striking pin is engaged with the latching mechanism);

[0036] Figure 10 A schematic diagram of the connection structure of another latching mechanism according to the present invention (showing the internal connection relationship);

[0037] Figure 11 A schematic diagram of the connection structure of another latching mechanism according to the present invention (showing the top position relationship);

[0038] Figure 12 A schematic diagram of the connection structure of another latching mechanism according to the present invention (showing the positions of the crank arm and crank pin);

[0039] Figure 13This is a schematic diagram of the connection structure of another latching mechanism according to the present invention (showing the position of the lower track).

[0040] Figure label:

[0041] 1. First cylinder

[0042] 2 Second Cylinder

[0043] 3 firing pins

[0044] 31 Limiting section

[0045] 311 approach surface

[0046] 312 transition surface

[0047] 4 latching mechanism

[0048] 41 latch arm

[0049] 411 latch pin

[0050] 42 drive shaft

[0051] 421 key axis

[0052] 422 bushing

[0053] 423 flat position

[0054] 43-inch swing arm

[0055] 431 keyway groove

[0056] 432 flat groove

[0057] 5 motor components

[0058] 51 crank arm

[0059] 511 crank pin

[0060] 6 elastic elements

[0061] 7. Outer shell

[0062] 8. Latch mechanism two

[0063] 81 latch arm two

[0064] 811 compression element

[0065] 812 compression element baffle

[0066] 813 Upper Track

[0067] 82 drive shaft two

[0068] 83 swing arm two

[0069] 84 Lower Track

[0070] 9-Shotplate Track Detailed Implementation

[0071] Now, with reference to the accompanying drawings, specific embodiments of the present invention will be described in detail. The embodiments described herein are merely preferred embodiments of the invention; those skilled in the art can conceive of other ways to implement the invention based on these preferred embodiments, and such other ways also fall within the scope of the invention. In some embodiments, to avoid confusion with the present invention, some technical features known in the art have not been described.

[0072] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. In case of conflict, the present invention (including definitions) shall prevail. Only exemplary methods and materials are described below; similar or equivalent methods and materials described herein may be used in experiments or tests of this invention. The materials, methods, and examples disclosed in this invention are illustrative only and are not intended to be limiting. Regarding the description of numerical ranges in this invention, it is explicitly contemplated that each intermediate number has the same degree of precision. For example, for the range of 6 to 9, the numbers 7 and 8 are considered in addition to 6 and 9, and for the range of 6.0 to 7.0, the numbers 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, and 7.0 are explicitly contemplated.

[0073] Figures 1-13 A nailing machine according to the present invention is shown. It should first be noted that the directional and positional terms used in this invention should be understood as relative directions and positions, not absolute directions and positions. The directional and positional terms used in this invention can be referred to... Figures 1-13 The exemplary structure shown is explained.

[0074] In existing braking mechanisms, the crank arm hard impact braking mechanism connected to the motor assembly has no buffering effect. Under actual high-intensity working conditions, it will not only cause rapid wear between the two, but also cause rapid wear and loosening of the connecting parts of the braking mechanism, ultimately leading to serious consequences such as brake failure.

[0075] This invention provides a nailing machine that can partially solve the above-mentioned problems.

[0076] refer to Figures 1-8 A preferred embodiment of the nailing machine of the present invention includes the following structure:

[0077] A closed first cylinder 1 and a closed second cylinder 2 are provided outside the first cylinder 1. The working chambers of the first cylinder 1 and the second cylinder 2 are connected to each other. A first piston is provided inside the first cylinder 1 and a striker 3 is fixedly connected to the first piston. A limiting part 31 is provided on the striker 3.

[0078] The nailing machine also includes a latching mechanism 4, which includes a latching arm 41, a drive shaft 42, and a rocker arm 43. The latching arm 41 is connected to the upper part of the drive shaft 42, and the rocker arm 43 is connected to the lower part of the drive shaft 42. At least one of the latching arm 41 and the rocker arm 43 is rotatably connected to the drive shaft 42 (for example, the latching arm 41 is elastically and rotatably connected to the upper part of the drive shaft 42, and the rocker arm 43 is fixedly connected to the lower part of the drive shaft 42; or, the latching arm 41 is fixedly connected to the upper part of the drive shaft 42, and the rocker arm 43 is elastically and rotatably connected to the lower part of the drive shaft 42; or the latching arm 41 is elastically and rotatably connected to the upper part of the drive shaft 42, and the rocker arm 43 is elastically and rotatably connected to the lower part of the drive shaft 42).

[0079] The second cylinder 2 is equipped with a second piston, which is driven by the motor assembly 5 to reciprocate between a first position and a second position. When the second piston is near the first position, the first piston moves inward and is engaged by the latch arm 41 on the limiting part 31 of the firing pin 3. When the second piston is near the second position, the motor assembly 5 drives the rocker arm 43 to rotate to a certain angle and then drives the latch arm 41 to disengage from the limiting part 31.

[0080] The working principle of the nailing machine described in this invention is as follows: The motor assembly 5 drives the second piston to reciprocate within the second cylinder 2. The second piston can reach two extreme points: a first position and a second position. When the second piston reaches near the first position, a negative pressure is generated within the second cylinder 2. Since the first cylinder 1 and the second cylinder 2 are connected, they attract the first piston, causing it to move inward. The firing pin 3 also retracts into the first cylinder 1. After the first piston reaches its extreme position (or near it), the latch arm 41 engages with the limiting part 31 of the firing pin 3, limiting... The movement of the firing pin 3 is controlled, and then the motor assembly 5 drives the second piston to the next stroke. The second piston moves to the second position, and high-pressure gas is generated in the first cylinder 1 and the second cylinder 2. Since the first piston and the firing pin 3 are locked by the latch arm 41 and the limiting part 31, the first piston and the firing pin 3 remain stationary. When the second piston reaches the vicinity of the second position, the motor assembly 5 continues to work, triggering the latching mechanism 4, so that the latch arm 41 disengages from the limiting part 31. Under the push of the high-pressure gas, the firing pin 3 is launched quickly and powerfully along with the first piston.

[0081] In this invention, the latching mechanism 4 employs at least one of the latching arm 41 and the rocker arm 43, which is rotatably connected to the transmission shaft 42. This provides a certain buffering effect to reduce the problem of rapid wear and loosening between the connecting parts.

[0082] Please refer to Figures 4-5 In a preferred embodiment, the rocker arm 43 is elastically and rotatably connected to the lower part of the drive shaft 42. In this case, the lower part of the drive shaft 42 has a protruding key 421, and the rocker arm 43 has a keyway groove 431 to accommodate the key 421. The size of the keyway groove 431 is larger than that of the key 421, allowing the key 421 to rotate a certain angle within the keyway groove 431. To achieve a better buffering effect, the angle is 5 to 30 degrees, preferably 5 to 20 degrees, and more preferably 10 degrees.

[0083] In another preferred embodiment, the latching arm 41 is elastically and rotatably connected to the upper part of the drive shaft 42. In this case, the upper part of the drive shaft 42 has a protruding key 421, and the latching arm 41 has a keyway 431 for accommodating the key 421. The keyway 431 is larger than the key 421, allowing the key 421 to rotate a certain angle within the keyway 431. To achieve a better buffering effect, the angle is 5 to 30 degrees, preferably 5 to 20 degrees, and more preferably 10 degrees.

[0084] In another preferred embodiment, the latch arm 41 is elastically and rotatably connected to the upper part of the drive shaft 42, and the rocker arm 43 is elastically and rotatably connected to the lower part of the drive shaft 42. In this case, both the upper and lower parts of the drive shaft 42 are provided with protruding key 421, and both the latch arm 41 and the rocker arm 43 are provided with keyway grooves 431 to accommodate the key 421. The size of the keyway groove 431 is larger than that of the key 421, allowing the key 421 to rotate a certain angle within the keyway groove 431. To achieve a better buffering effect, the sum of the rotation angles of the latch arm 41 and the rocker arm 43 is 5 to 30 degrees, preferably 5 to 20 degrees, and more preferably 10 degrees.

[0085] In the aforementioned nailing machine, the upper and / or lower part of the drive shaft 42 is provided with at least one key 421. For example, one to four keys 421 may be provided. To ensure the strength of the drive shaft 42, preferably, two to three keys 421 are provided, more preferably, two keys 421 are provided. When two to four keys 421 are provided, all keys 421 are symmetrically arranged around the drive shaft 42. As a non-limiting embodiment, the keys 421 may be integrally formed with the drive shaft 42.

[0086] Please refer to Figures 6-7 As another preferred alternative embodiment, the protruding key 421 can be replaced by a flat portion 423 provided on the drive shaft 42, and the key groove 431 can be replaced by a flat portion groove 432. As a non-limiting embodiment, the flat portion 423 is formed by milling the upper or lower part of the drive shaft 42.

[0087] like Figure 4 As shown, furthermore, to ensure a good fit and fixation between the rocker arm 43 and the drive shaft 42, the lower part of the drive shaft 42 is axially limited on the drive shaft 42 by a bushing 422. The rocker arm 43 is not fixed to the drive shaft 42; it can slide or rotate on the drive shaft. The sliding distance is limited by the distance between the drive shaft 42 and the bushing 422, while the bushing 422 is interference-fitted onto the outer casing 7.

[0088] Please refer to Figure 2 and Figure 8 In a preferred embodiment, an elastic element 6 is connected to the rocker arm 43. The elastic element 6 can apply pressure to the rocker arm 43, which is then transmitted to the latch arm 41 via the drive shaft 42, so that the end of the latch arm 41 abuts against the side wall of the firing pin 3. The specific location of the elastic element 6 is not limited, as long as the above-mentioned effect is achieved. In a preferred embodiment, the nailing machine also includes a housing 7, and the elastic element 6 is disposed on the housing 7. The specific structure and material of the elastic element 6 are not limited, as long as the above-mentioned effect is achieved. In a preferred embodiment, the elastic element 6 is a torsion spring.

[0089] like Figure 5 As shown, in a preferred embodiment, the rocker arm 43 is in the initial position due to the torque of the elastic element 6. When the rocker arm 43 rotates, the drive shaft 42 will not rotate immediately because there is a gap between the rocker arm 43 and the key 421 (or flat part 423). The drive shaft 42 will only rotate when the rocker arm 43 moves to a specific position. Simultaneously, the elastic element 6 provides a certain buffering effect. In another preferred embodiment, when the latch arm 41 is connected to the elastic element 6, its working principle is similar to the first preferred embodiment; the elastic element 6 provides a certain buffering effect.

[0090] Please see Figure 3In a preferred embodiment, the end of the latching arm 41 is provided with a latching pin 411 for engaging with the limiting portion 31 of the firing pin 3. As a further preferred embodiment, the latching arm 41 is configured with a double-layer structure to accommodate the sidewall of the firing pin 3. This design improves the structural stability of the latching arm 41 while increasing the stability between it and the firing pin 3.

[0091] Please continue reading Figure 1 In one embodiment, the firing pin 3 is an elongated plate, and the limiting portion 31 is a protrusion formed on the side wall of the firing pin 3. The side wall of the protrusion includes a bearing surface 311 and a transition surface 312. The bearing surface 311 is perpendicular to or at an angle to the length direction of the firing pin 3, and the transition surface 312 extends from the side wall of the firing pin 3 to the bearing surface 311. In another embodiment (not shown), the firing pin 3 is an elongated plate, and the limiting portion 31 is a keyway groove formed on the side wall of the firing pin 3. The groove wall of the keyway groove includes a bearing surface and a transition surface. The bearing surface is perpendicular to or at an angle to the length direction of the firing pin 3, and the transition surface extends from the side wall of the firing pin 3 to the bearing surface. As a preferred embodiment, the transition surface is an arc surface or an inclined plane structure; or, the transition surface is a plane parallel to the length direction of the firing pin 3 combined with an arc surface or an inclined plane structure.

[0092] like Figure 1 As shown, in one embodiment, the motor assembly 5 includes a motor and a transmission assembly (e.g., a gearbox assembly). The motor is a DC motor, and a crank arm 51 that can rotate circumferentially about the output shaft axis is fixedly connected to the output shaft of the DC motor. One end of the crank arm 51 is provided with a crank pin 511 for driving the rocker arm 43 to rotate, and the other end of the crank arm 51 is pivotally connected to a connecting rod connected to the second piston.

[0093] Please see Figures 9-13 According to another aspect of the invention, another nailing machine is provided, which can also partially solve the problems of rapid wear and loosening between connecting parts caused by the hard impact of the crank arm on the brake.

[0094] In this type of nailing machine, such as Figures 9-10 As shown, the nailing machine includes a closed first cylinder 1 and a second cylinder 2 disposed outside the first cylinder 1 and closed. The working chambers of the first cylinder 1 and the second cylinder 2 are connected to each other. A first piston is provided inside the first cylinder 1 and a striking pin 3 is fixedly connected to the first piston. A limiting part 31 is provided on the striking pin 3.

[0095] The nailing machine also includes a latching mechanism 2 8, which includes a latching arm 2 81, a transmission shaft 2 82, and a swing arm 2 83. The latching arm 2 81 is fixedly connected to the upper part of the transmission shaft 2 82, and the swing arm 2 83 is fixedly connected to the lower part of the transmission shaft 2 82.

[0096] The second cylinder 2 is equipped with a second piston, which is driven by the motor assembly 5 to reciprocate between a first position and a second position. When the second piston is near the first position, the first piston moves inward and is engaged by the latch arm 81 on the limiting part 31 of the firing pin 3. When the second piston is near the second position, the motor assembly 5 drives the rocker arm 83, the transmission shaft 82, and the latch arm 81 to move away from the firing pin 3 along a direction perpendicular to or at a certain angle to the length of the firing pin 3, thereby causing the latch arm 81 to disengage from the limiting part 31. The latch arm 81 is connected to a compression element 811, which allows the end of the latch arm 81 to abut against the side wall of the firing pin 3.

[0097] In this embodiment, the compression element 811, as an elastic component, can act as a buffer when the crank arm impacts the rocker arm 83, at least partially preventing problems such as rapid wear and loosening between the connecting parts. The specific structure and material of the compression element 811 are not limited, as long as the above-mentioned effects are achieved. As a preferred embodiment, the compression element 811 is a compression spring or compression rubber.

[0098] In addition, to ensure the effective operation of the compression element 811, such as Figure 9 As shown, a compression element baffle 812 is provided on the opposite side of the latch arm 81. The compression element baffle 812 can be integrally formed with the housing 7, or it can be installed on the housing 7 as a separate component.

[0099] Please refer to Figures 9-13 In one embodiment, the second latch arm 81 moves along an upper track 813, which is perpendicular to or at an angle to the length direction of the firing pin 3; the bottom of the second drive shaft 82 moves along a lower track 84, which is parallel to the upper track 813. Specifically, the upper track 813 is disposed on the housing 7 and corresponds to the position of the latch arm 81. (See reference...) Figure 10 and Figure 13 The lower track 84 is disposed on the outer casing 7. The position of the lower track 84 corresponds to the bottom position of the transmission shaft 82. It can be integrally formed with the outer casing 7 or installed on the outer casing 7 as a separate wear-resistant component.

[0100] Furthermore, the other components of this alternative nailing machine are basically the same in function and implementation as the corresponding components of the first type of nailing machine, and will not be described in detail here.

[0101] In addition, the two types of nailing machines mentioned above also include other components, such as... Figure 7 As shown, the firing pin track 9 is used to protect the firing pin 3. Other structures of the nailing machine can utilize existing technologies and will not be described in detail here.

[0102] The above description of various embodiments of the present invention is provided for illustrative purposes to a person skilled in the art. It is not intended to limit the invention to a single disclosed embodiment. As taught above, those skilled in the art will understand various alternatives and variations of the invention. Therefore, although some alternative embodiments have been specifically described, those skilled in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all alternatives, modifications, and variations of the invention described herein, as well as other embodiments falling within the spirit and scope of the invention described above.

Claims

1. A nail-driving machine, characterized in that, The nailing machine includes a closed first cylinder (1) and a closed second cylinder (2) disposed outside the first cylinder (1). The working chamber of the first cylinder (1) and the working chamber of the second cylinder (2) are connected to each other. The first cylinder (1) is provided with a first piston and a striking pin (3) is fixedly connected to the first piston. The striking pin (3) is provided with a limiting part (31). The nailing machine also includes a latching mechanism (4), which includes a latching arm (41), a drive shaft (42), and a rocker arm (43). The latching arm (41) is connected to the upper part of the drive shaft (42), and the rocker arm (43) is connected to the lower part of the drive shaft (42). At least one of the latching arm (41) and the rocker arm (43) is rotatably connected to the drive shaft (42). The second cylinder (2) is provided with a second piston, and the second piston is driven by the motor assembly (5) to reciprocate between the first position and the second position of the second cylinder (2); when the second piston is near the first position, the first piston moves inward and is engaged by the latch arm (41) on the limiting part (31) of the firing pin (3); when the second piston is near the second position, the motor assembly (5) drives the rocker arm (43) to rotate to a certain angle and then drives the latch arm (41) to disengage from the limiting part (31).

2. The nailing machine according to claim 1, characterized in that, The upper and / or lower part of the drive shaft (42) is provided with a protruding key (421), and the latch arm (41) and / or rocker arm (43) are provided with a key groove (431) to accommodate the key (421), and the size of the key groove (431) is larger than that of the key (421), so that the key (421) can rotate a certain angle in the key groove (431).

3. A nailing machine according to claim 1, characterized in that, The upper and / or lower part of the drive shaft (42) is provided with a flat part (423), and the latch arm (41) and / or the rocker arm (43) are provided with a flat part groove (432) to accommodate the flat part (423). The size of the flat part groove (432) is larger than that of the flat part (423), so that the flat part (423) can rotate a certain angle in the flat part groove (432).

4. A nailing machine according to claim 1, characterized in that, The lower part of the drive shaft (42) uses a bushing (422) to axially limit the rocker arm (43) on the drive shaft (42).

5. A nailing machine according to claim 1, characterized in that, The angle is 5 to 30 degrees, preferably 5 to 20 degrees, and more preferably 10 degrees.

6. A nailing machine according to claim 1, characterized in that, An elastic element (6) is connected to the rocker arm (43). The elastic element (6) can apply pressure to the rocker arm (43) and then transmit it to the latch arm (41) through the transmission shaft (42) so that the end of the latch arm (41) abuts against the side wall of the firing pin (3).

7. A nailing machine according to claim 6, characterized in that, The nailing machine also includes a housing (7), and the elastic element (6) is disposed on the housing (7).

8. A nailing machine according to claim 1, characterized in that, The end of the latch arm (41) is provided with a latch pin (411) for engaging with the limiting part (31) of the firing pin (3).

9. A nailing machine according to claim 1, characterized in that, The latch arm (41) is configured as a double-layer structure, capable of accommodating the sidewall of the firing pin (3).

10. A nailing machine according to claim 1, characterized in that, The firing pin (3) is a long strip plate, and the limiting part (31) is a protrusion or groove opened on the side wall of the firing pin (3).

11. A nailing machine according to claim 10, characterized in that, The sidewall of the protrusion or groove includes a contact surface (311) and a transition surface (312). The contact surface (311) is perpendicular to or at a certain angle to the length direction of the firing pin (3). The transition surface (312) extends from the sidewall of the firing pin (3) to the contact surface (311).

12. A nailing machine according to claim 11, characterized in that, The transition surface is an arc surface or an inclined plane structure; or, the transition surface is a plane parallel to the length direction of the firing pin (3) combined on the arc surface structure or the inclined plane structure.

13. A nailing machine according to claim 1, characterized in that, The motor assembly (5) includes a motor and a transmission assembly. The motor is a DC motor. A crank arm (51) that can rotate circumferentially around the output shaft axis is fixedly connected to the output shaft of the DC motor. One end of the crank arm (51) is provided with a crank pin (511) for driving the rocker arm (43) to rotate. The other end of the crank arm (51) is pivotally connected to a connecting rod that is connected to the second piston.

14. A nailing machine, characterized in that, The nailing machine includes a closed first cylinder (1) and a closed second cylinder (2) disposed outside the first cylinder (1). The working chamber of the first cylinder (1) and the working chamber of the second cylinder (2) are connected to each other. The first cylinder (1) is provided with a first piston and a striking pin (3) is fixedly connected to the first piston. The striking pin (3) is provided with a limiting part (31). The nailing machine also includes a latching mechanism two (8), which includes a latching arm two (81), a transmission shaft two (82) and a swing arm two (83). The latching arm two (81) is fixedly connected to the upper part of the transmission shaft two (82), and the swing arm two (83) is fixedly connected to the lower part of the transmission shaft two (82). The second cylinder (2) is provided with a second piston, which is driven by the motor assembly (5) to reciprocate between the first position and the second position of the second cylinder (2); when the second piston is near the first position, the first piston moves inward and is engaged by the latch arm two (81) on the limiting part (31) of the firing pin (3); when the second piston is near the second position, the motor assembly (5) drives the swing arm two (83), the transmission shaft two (82) and the latch arm two (81) to move away from the firing pin (3) along the length direction of the firing pin (3) perpendicularly or at a certain angle, thereby causing the latch arm two (81) to disengage from the limiting part (31); wherein, the latch arm two (81) is connected to a compression element (811), and the compression element (811) can make the end of the latch arm two (81) abut against the side wall of the firing pin (3).

15. A nailing machine according to claim 14, characterized in that, The latch arm 2 (81) moves along the upper track (813), which is perpendicular to or at a certain angle to the length direction of the firing pin (3); the bottom of the drive shaft 2 (82) moves along the lower track (84), which is parallel to the upper track (813).

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