Electric C-shaped nail gun

Abstract

The invention provides an electric C-shaped nail gun which comprises a machine shell, a driver, a transmission module, a driving screw and two clamping pieces, the driver is arranged in the machine shell and can be powered to move, the transmission module is connected with the driver, the driving screw is provided with external threads and is screwed with the transmission module, the external threads are trapezoidal threads, the clamping pieces are arranged on the machine shell in a pivoted mode, and the clamping pieces are connected with the driving module. The driver can drive the guide screw rod through transmission of the transmission module, the guide screw rod moves linearly, the abutting assembly abuts against the two clamping pieces to rotate relative to the machine shell, and therefore the clamping parts of the two clamping pieces get close to each other, and the C-shaped nail is formed in a clamping and pressing mode. According to the C-type nail gun, the torque provided by the driver is converted into linear movement of the guide screw through the trapezoidal threads, the transmission efficiency can be improved, and the overall power density of the C-type nail gun is increased.

Description

Technical Field

[0001] The invention relates to the technical field of nail guns, and in particular to an electric C-type nail gun capable of improving transmission efficiency. Background Art

[0002] A C-type nail gun is a tool used to form C-shaped nails. After the nozzle of the C-type nail gun is aimed at the object to be fastened, the trigger of the C-type nail gun is pulled, and the nozzle of the C-type nail gun moves to clamp the nail piece, so that the nail piece is formed into a C-shaped nail and fastens the target object.

[0003] A transmission structure of an existing C-type nail gun includes a screw rod, through which the rotational power provided by a motor is converted into linear motion, and the gun nozzle is driven to open and close to clamp the C-type nail. However, the screw rods used in the existing C-type nail guns are mostly screw rods with metric (ISO) triangular threads (i.e., mechanical threads used for general bolts and screws, or V-type threads). Since the thread angle of the metric triangular thread is about 60°, the angle is relatively large, the friction force during rotation is also relatively large, and the pitch of the metric triangular thread is relatively short, the ideal power transmission efficiency (or transmission efficiency) of the metric triangular thread is only about 15% to 20%, and the actual situation is usually lower. Summary of the invention

[0004] In order to solve the problem that the transmission screw in the existing C-type nail gun adopts metric triangular thread and has low power transmission efficiency, the purpose of the present invention is to provide an electric C-type nail gun that can improve the transmission efficiency.

[0005] The electric C-type nail gun proposed by the present invention to solve the technical problem comprises:

[0006] a housing;

[0007] A driver, disposed in the housing, the driver being capable of moving when powered;

[0008] a transmission module connected to the driver;

[0009] a lead screw, the lead screw having an external thread that is threadedly engaged with the transmission module, the external thread being a trapezoidal thread, and a push-up assembly being fixedly disposed on the lead screw; and

[0010] Two clamping members, each of which is pivotally mounted on the housing, and each of which comprises a clamping portion;

[0011] When the driver moves, it can drive the lead screw through the transmission module, so that the lead screw moves linearly and the abutting assembly abuts against the two clamping members, so that the two clamping members rotate relative to the housing and the clamping parts of the two clamping members approach each other.

[0012] As described above, the electric C-type nail gun, wherein the external thread of the lead screw has a lead greater than or equal to 5 mm.

[0013] As described above, the electric C-type nail gun, wherein the transmission module includes a first gear and a transmission member, the first gear is fixed on an output shaft of the driver, the transmission member is meshed with the first gear and threaded with the lead screw, the transmission member is driven by the first gear to rotate, and drives the lead screw to move linearly.

[0014] As described above, the electric C-type nail gun, wherein the length of the transmission member is greater than the length of the first gear.

[0015] As described above, the electric C-type nail gun, wherein the transmission module is detachably disposed in the casing.

[0016] As described above, the electric C-type nail gun, wherein the two clamping members are arranged opposite to each other, each of the clamping members includes an extension arm located opposite to the clamping portion, the clamping member is pivoted to a pivot of the housing and is located between the clamping portion and the extension arm, and the abutting assembly includes two abutting wheels, and the two abutting wheels can move linearly together with the lead screw, thereby respectively abutting the extension arms of the two clamping members, so that the extension arms of the two clamping members are moved away from each other.

[0017] As described above, the electric C-type nail gun, wherein the abutment assembly includes a abutment plate, and the abutment plate can move linearly together with the lead screw to abut the clamping parts of the two clamping members, so that the clamping parts of the two clamping members are separated from each other.

[0018] As described above, the electric C-type nail gun, wherein the driver includes a motor and a reduction mechanism, the reduction mechanism is connected to the motor, the motor outputs a torque, and the torque can be increased by the reduction mechanism and transmitted to the lead screw.

[0019] As described above, the electric C-type nail gun, wherein the motor is a permanent magnet synchronous motor.

[0020] The technical effect that can be obtained by the technical means of the present invention is that compared with the existing C-type nail gun whose screw adopts metric triangular thread and has low transmission efficiency, the electric C-type nail gun of the present invention, in which the external thread of the lead screw adopts a trapezoidal thread with a relatively small thread angle, reduces the friction during thread transmission, and when the torque provided by the driver is converted into the linear motion of the lead screw by utilizing the external thread, the transmission efficiency can be effectively improved, and the overall power density of the C-type nail gun can be increased, thereby making the volume of the C-type nail gun smaller and the weight lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1A three-dimensional appearance diagram of a preferred embodiment of the present invention;

[0022] Figure 2 A side view of a preferred embodiment of the present invention with part of the housing omitted;

[0023] Figure 3 A block diagram of electrical connections of a preferred embodiment of the present invention;

[0024] Figure 4 It is an enlarged side view of a partial cross section of a preferred embodiment of the present invention;

[0025] Figure 5 A partially enlarged side cross-sectional view of a lead screw according to a preferred embodiment of the present invention;

[0026] Figure 6 A motion diagram showing a side view of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to understand the technical features and practical effects of the present invention in detail and to realize the invention according to the present invention, the preferred embodiments shown in the accompanying drawings are described in detail as follows:

[0028] like Figure 1 and Figure 2 As shown, the electric C-type nail gun of the preferred embodiment of the present invention includes a housing 10, a driver 20, a transmission module 30, a lead screw 40 and two clamping members 50. The housing 10 is the main structure of the electric C-type nail gun. The driver 20, the transmission module 30 and the lead screw 40 are installed in the housing 10. The clamping member 50 is installed on the housing 10. The transmission module 30 is connected to the driver 20 and is screwed with the lead screw 40, so that the driver 20 can drive the lead screw 40 through the transmission module 30, and then the two clamping members 50 clamp and press a nail material into a C-type nail to engage the target object.

[0029] like Figure 1 and Figure 2 As shown, the housing 10 includes a rear seat 11, a gun body 12, and a handle 13 connected to each other. The front end of the rear seat 11 is connected to the rear end of the gun body 12 and the top of the handle 13. The driver 20 is arranged in the rear seat 11, and the clamping member 50 is installed on the gun body 12. The housing 10 also includes a trigger 14, which is movably arranged on the handle 13. The user can activate the driver 20 by pressing the trigger 14. In the preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, the trigger 14 is connected to a start switch 15, the driver 20 includes a motor 21, and a circuit board 16 may be provided in the handle 13. The circuit board 16 is electrically connected to the start switch 15 and the motor 21. When the trigger 14 is pressed, the motor 21 can be started by the start switch 15 and the circuit board 16 using an electronic control method.

[0030] In a preferred embodiment of the present invention, the motor 21 is a permanent magnet synchronous motor, which has the advantages of being small in size and being able to reach a high speed in a short time. Figure 2 As shown, the driver 20 also includes a reduction mechanism 22, which is connected to the motor 21. The motor 21 can output a torque to the reduction mechanism 22. The aforementioned torque can be increased by the gear set inside the reduction mechanism 22 and transmitted to the lead screw 40, so that the lead screw 40 moves linearly. The detailed structure and operation principle of the motor 21 and the reduction mechanism 22 are conventional technical means in the prior art and will not be repeated here.

[0031] like Figure 2 and Figure 4 As shown, the transmission module 30 includes a housing 300, a first gear 31 and a transmission member 32. The housing 300 is fixed in the rear seat 11 of the casing 10. The first gear 31 and the transmission member 32 are arranged in the housing 300. The first gear 31 is fixed on an output shaft provided by the reduction mechanism 22 of the driver 20, so that the first gear 31 rotates synchronously with the output shaft of the reduction mechanism 22. The transmission member 32 is rotatably arranged in the housing 300 and meshes with the first gear 31. The transmission member 32 is provided with an internal thread and is threaded with the lead screw 40 through an external thread. After the driver 20 is started, the torque output by the motor 21 is increased through the reduction mechanism 22, and is transmitted through the first gear 31 and the transmission member 32, driving the lead screw 40 to move linearly forward or backward. Among them, the transmission ratio of the meshing of the first gear 31 and the transmission member 32 can be set according to needs, and no restrictions are made here.

[0032] Further, if Figure 2 and Figure 4 As shown, in a preferred embodiment of the present invention, the length of the transmission member 32 is greater than the length of the first gear 31. Specifically, the transmission member 32 includes a second gear 33 and a guide cylinder 34. The second gear 33 is meshed with the first gear 31. The internal thread of the transmission member 32 is arranged in the guide cylinder 34, wherein the length of the first gear 31 is the same as the length of the second gear 33 and is smaller than the length of the guide cylinder 34. The longer transmission member 32 increases the length of the threaded engagement between the transmission module 30 and the lead screw 40, thereby making the transmission more stable and the lead screw 40 less likely to have a yaw movement other than linear movement. In addition, the transmission module 30 is also provided with a bearing, which is arranged between the housing 300 and the transmission member 32 to ensure that the transmission member 32 is stably fixed in a fixed position in the housing 300 and can rotate smoothly relative to the housing 300.

[0033] In addition, in a preferred embodiment of the present invention, the transmission module 30 is detachably disposed in the casing 10, that is, the first gear 31 and the second gear 33 and the guide cylinder 34 of the transmission member 32 are disposed in the outer shell 300, and the outer shell 300 is fixed to the casing 10 by bolts. In other embodiments, the first gear 31 and the transmission member 32 can also be directly fixed in the casing 10. The advantage of the preferred embodiment of the present invention is that, by utilizing the overall detachable design of the transmission module 30, during installation, the other components of the transmission module 30 can be externally installed on the outer shell 300, and the outer shell 300 can be directly locked on the casing 10, without having to fix all the components of the transmission module 30 to the casing 10 one by one. Not only is installation and disassembly more convenient, but the overall positioning accuracy of the transmission module 30 is also better.

[0034] In a preferred embodiment of the present invention, an internal thread is provided on the transmission member 32 to be threadedly engaged with the lead screw 40. In other embodiments, the transmission module 30 may also use other mechanisms other than the gear set of the first gear 31 and the transmission member 32 for transmission. As long as the transmission module 30 is connected to the driver 20 for transmission and is threadedly engaged with the lead screw 40, the torque output by the driver 20 can be transmitted to the lead screw 40, so that the lead screw 40 moves linearly. The actual form of the transmission module 30 is not limited to the preferred embodiment of the present invention.

[0035] like Figure 4 As shown, the lead screw 40 has an external thread 41, and the external thread 41 matches the internal thread of the transmission member 32, wherein the external thread 41 is a trapezoidal thread, such as Figure 5 As shown, the trapezoidal thread refers to the cross-section of the external thread 41 being an isosceles trapezoid, and the external thread 41 has a thread angle θ, the thread angle θ is 30°, wherein; the external thread 41 also has a lead P, the lead P refers to the axial distance that the lead screw 40 advances when the external thread 41 rotates one circle. In a preferred embodiment of the present invention, since the external thread 41 is a single-thread thread, the pitch of the external thread 41 is equivalent to the lead P of the external thread 41. In addition, in a preferred embodiment of the present invention, the lead P of the external thread 41 is greater than or equal to 5 mm, and the lead screw 40 has a higher lead, which can increase the linear movement rate of the lead screw 40 and improve the power transmission efficiency of the lead screw 40 to more than 80%.

[0036] like Figure 4 As shown, each clamping member 50 is pivotally mounted on the gun body 12 of the housing 10 and includes a clamping portion 51. A push assembly 42 is fixedly mounted at one end of the lead screw 40. When the lead screw 40 moves linearly, the push assembly 42 moves linearly together and pushes against the two clamping members 50, so that the two clamping members 50 rotate relative to the housing 10 and the clamping portions 51 of the two clamping members 50 approach each other. By the clamping portions 51 of the two clamping members 50 approaching each other and being in a clamping state, the effect of clamping and pressing the aforementioned nail member into a C-shaped nail is achieved.

[0037] Specifically, if Figure 4 As shown, in a preferred embodiment of the present invention, each clamping member 50 further includes an extension arm 52, the extension arm 52 is opposite to the clamping portion 51, the extension arm 52 and the clamping portion 51 are respectively located at the tail and head of the clamping member 50, and the pivot axis of the clamping member 50 pivotally disposed on the housing 10 is located between the extension arm 52 and the clamping portion 51. Figure 2 and Figure 6 As shown, the top-resisting assembly 42 includes a base and two pulley blocks arranged on the base and arranged side by side up and down, each pulley block includes two top-resisting wheels 43 arranged coaxially and at intervals, and the lead screw 40 is directed toward Figure 6 When the right side of the pulley moves linearly, the top wheels 43 of the two pulley sets move toward Figure 6 The right side of the two clamping members 50 moves linearly, thereby respectively pressing against the extension arms 52 of the two clamping members 50, causing the two clamping members 50 to rotate, and the extension arms 52 of the two clamping members 50 move away from each other. The clamping portions 51 of the two clamping members 50 then approach each other and squeeze the nail piece as the two clamping members 50 rotate, so as to clamp and press the nail piece into a C-shaped nail.

[0038] In addition, if Figure 4 As shown, in a preferred embodiment of the present invention, the top-resisting assembly 42 further includes a top-resisting piece 44, and the top-resisting piece 44 is disposed between the two top-resisting wheels 43 of each pulley block. Figure 6 As shown, when the lead screw 40 is directed toward Figure 6 When the right side of the linear movement, the top plate 44 is moved toward Figure 6 The right side of the lead screw 40 is linearly moved, thereby disengaging from between the clamping portions 51 of the two clamping members 50, so that the two clamping portions 51 can approach each other to clamp and press to form a C-shaped nail, and when the lead screw 40 is moved toward Figure 6 When the left side of the linear movement, the top plate 44 together toward Figure 6 The left side of the clamping member 50 is linearly moved and abuts against the clamping portions 51 of the two clamping members 50, pushing the clamping portions 51 of the two clamping members 50 apart and away from each other, and returning to the state as shown in FIG. Figure 4 The open state before the C-shaped nail is clamped is shown; in other embodiments, the two clamping members 50 can also be reset by setting a spring, which is not limited to the preferred embodiment of the present invention.

[0039] Compared with the existing C-type nail gun whose screw adopts metric triangular thread and has low transmission efficiency, the electric C-type nail gun of the present invention, in which the external thread 41 of the lead screw 40 adopts a trapezoidal thread with a relatively small thread angle, and the friction force of the external thread 41 during transmission is small. When the external thread 41 is used to convert the torque provided by the driver 20 into the linear motion of the lead screw 40, the transmission efficiency can be effectively improved, and the overall power density of the C-type nail gun can be increased, thereby making the volume of the C-type nail gun smaller and the weight lighter.

[0040] In the description of the preferred embodiment of the present invention, a trapezoidal thread external thread 41 is used, and its thread angle θ is 30°, which is the thread angle of the metric trapezoidal thread. In fact, the thread angle θ may slightly deviate from 30° due to the tolerance during manufacturing. In addition, the thread angle of the American trapezoidal thread is 29°. The above two can also achieve the effect of improving the transmission efficiency of the present invention. The thread angle of the trapezoidal thread described in the present invention is not limited to 30° in the preferred embodiment of the present invention.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician in the field, if they do not depart from the scope of the technical solution proposed by the present invention, use the technical content disclosed by the present invention to make partial changes or modifications to the equivalent embodiments, and do not depart from the technical solution content of the present invention, they are still within the protection scope of the present invention.

Claims

1. An electric C-type nail gun, characterized in that: include: a housing; A driver, disposed in the housing, the driver being capable of moving when powered; a transmission module connected to the driver; a lead screw, the lead screw having an external thread that is threadedly engaged with the transmission module, the external thread being a trapezoidal thread, and a push-up assembly being fixedly disposed on the lead screw; and Two clamping members, each of which is pivotally mounted on the housing, and each of which comprises a clamping portion; When the driver moves, it can drive the lead screw through the transmission module, so that the lead screw moves linearly and the abutting assembly abuts against the two clamping members, so that the two clamping members rotate relative to the housing and the clamping parts of the two clamping members approach each other.

2. The electric C-type nail gun according to claim 1, characterized in that: The external thread of the lead screw has a lead that is greater than or equal to 5 mm.

3. The electric C-type nail gun according to claim 1, characterized in that: The transmission module includes a first gear and a transmission member. The first gear is fixed on an output shaft of the driver. The transmission member is meshed with the first gear and threaded with the lead screw. The transmission member is driven by the first gear to rotate and drives the lead screw to move linearly.

4. The electric C-type nail gun according to claim 3, characterized in that: The length of the transmission member is greater than the length of the first gear.

5. The electric C-type nail gun according to claim 1, characterized in that: The transmission module is detachably arranged in the casing.

6. The electric C-type nail gun according to claim 1, characterized in that: The two clamping members are arranged opposite to each other, and each of the clamping members includes an extension arm opposite to the clamping portion. The clamping member is pivoted to a pivot of the housing and is located between the clamping portion and the extension arm. The abutting assembly includes two abutting wheels, and the two abutting wheels can move linearly together with the lead screw, thereby respectively abutting the extension arms of the two clamping members, so that the extension arms of the two clamping members are separated from each other.

7. The electric C-type nail gun according to claim 1 or 6, characterized in that: The abutting assembly includes an abutting piece, which can move linearly together with the lead screw to abut the clamping parts of the two clamping members, so that the clamping parts of the two clamping members are separated from each other.

8. The electric C-type nail gun according to claim 1, characterized in that: The driver includes a motor and a reduction mechanism, wherein the reduction mechanism is connected to the motor, and the motor outputs a torque, which can be increased by the reduction mechanism and transmitted to the lead screw.

9. The electric C-type nail gun according to claim 8, characterized in that: The motor is a permanent magnet synchronous motor.

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