Electric nail gun

Abstract

The utility model discloses an electric nail gun. The electric nail gun comprises a shell, a reciprocating linear motor, a first rack and a second rack are arranged in the shell, the first rack is arranged at the output end of the reciprocating linear motor and driven by the reciprocating linear motor to reciprocate, and a firing pin support is fixed to one end of the second rack; a striker support is arranged on the first rack, a striker is arranged on the striker support, the striker is parallel to the second rack, the first rack and the second rack are in linkage through a gear set, and then reciprocating motion of the second rack is formed through reciprocating motion transmission of the first rack. The device has the beneficial effects that linkage and power transmission are achieved by arranging the gear set between the first rack and the second rack, linear motion of the reciprocating linear motor is transmitted to the second rack through meshing of the gear and the racks, and the second rack and the rivet on the second rack are driven to reciprocate in the linear direction; flexible deformation is avoided, the overall structure is compact, the size is smaller, and carrying is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical manufacturing, in particular to an electric nail gun. Background Art

[0002] Electric nail guns (electric nail guns) are a type of nail gun, which is very different from traditional air nail guns and is a new type of nail gun. Compared with air nail guns, electric nail guns have the advantages of being lighter, less noisy, more energy-efficient, easier to carry, and more cost-effective, so they are widely used in construction, decoration, furniture manufacturing and other fields.

[0003] At present, most of the electric nail guns on the power tool market achieve linear motion by converting the rotary motion of a rotary motor into linear motion, or by using electromagnets in the prior art such as patent CN105082065B, invention name "electromagnetic nail gun". In the above method, the rotary motion of the rotary motor is converted into linear motion, and the mechanism structure required is relatively complex, requiring a deceleration mechanism and a rotary conversion linear mechanism. At the same time, it is necessary to ensure that the rotation process is continuous. In addition, an extreme trigger mechanism is required to realize the electric nailing operation. In addition, the common point of the above two methods is that the linear driving force of the two methods is unidirectional, and the return force is basically reset by a spring. During long-term use, the spring will inevitably fatigue and deform, which will affect the nailing stroke and greatly affect the service life of the electric nail gun.

[0004] Furthermore, in the prior art including the above patents, a connecting rod and a lever part are provided at the end of the linear motion, and the connecting rod drives the lever to rotate within a certain range around the pivot point, thereby driving the striker to move back and forth along its axis to achieve the nailing operation. Since the end of the lever away from the connecting rod is in direct contact with the end of the striker and exerts a force on the striker, the part where the lever contacts the striker is the force point. During long-term use, the force point of the lever will produce flexural deformation, that is, its end will deform in the opposite direction of the striker, thereby affecting the formation of the striker. Therefore, during use, the nail will be stuck between the outlet of the nail clamp cavity and the striker channel, affecting the nailing efficiency.

[0005] To solve the above problems, designing an electric nail gun is an important technical problem that those skilled in the art need to solve. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems existing in the prior art and to provide an electric nail gun.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] An electric nail gun comprises a shell; a reciprocating linear motor, a first rack and a second rack are arranged in the shell, the first rack is arranged at the output end of the reciprocating linear motor and is driven by the motor to produce reciprocating motion, and a striker bracket is fixed to one end of the second rack; a striker is arranged on the striker bracket, and the striker is arranged parallel to the second rack, the first rack and the second rack are linked by a gear set, so that the reciprocating motion of the first rack is transmitted to form the reciprocating motion of the second rack.

[0009] Preferably, the gear set includes a first gear and a second gear that are coaxially fixed, the radius and the number of teeth of the second gear are larger than the radius and the number of teeth of the first gear, the first rack is meshed with the first gear, and the second rack is meshed with the second gear; the first gear and the second gear are synchronously driven by the first rack and make rotational motion.

[0010] Preferably, the first rack is a double-tooth structure.

[0011] Preferably, a balancing gear meshing with the first rack is further provided in the housing, and the balancing gear and the first gear are arranged on two sides of the first rack opposite to each other to balance the normal force of the first rack.

[0012] Preferably, the balancing gear is exactly the same model as the first gear.

[0013] Preferably, the second gear is a half gear structure.

[0014] Preferably, there are two first racks, the tails of which are fixedly connected to the output end of the reciprocating linear motor, each first rack is meshed with one of the first gears, and the second gear is located between the two first gears.

[0015] Preferably, the striker bracket is connected to the slide rod through a guide sleeve; the slide rod is fixed on the slide rod bracket and is arranged parallel to the second rack.

[0016] Preferably, a buffer body is provided at the end of the slide rod, and the buffer body comprises a buffer spring and an elastic body, and the buffer spring is provided between the elastic body and the slide rod bracket.

[0017] Preferably, an energy storage spring is also provided between the striker bracket and the slide rod bracket.

[0018] The advantages of the technical solution of the utility model are mainly reflected in:

[0019] The linkage and power transmission are realized by arranging a gear set between the first rack and the second rack. Specifically, the first gear and the second gear are coaxially fixed and mesh with the first rack and the second rack respectively, so that the linear motion of the reciprocating linear motor is transmitted to the second rack, and the second rack and the nail thereon are driven to reciprocate in a linear direction, and the speed is increased during the power transmission process. The reciprocating linear motion can be realized without adding an extreme trigger mechanism, and no flexible deformation will occur, which effectively prevents the nail from being stuck between the outlet of the nail clamp cavity and the nail channel, thereby improving the nailing efficiency. The overall structure is compact, the volume is smaller, and it is easy to carry.

[0020] The first rack and the second rack can be set at an angle, and the angle can be adjusted according to the use requirements to meet the nailing requirements of different use places to achieve the best ergonomic design;

[0021] A balancing gear is arranged on the first rack, and the balancing gear is arranged opposite to the first gear; when in use, the balancing gear and the first gear rotate synchronously relative to each other along the first rack, which can offset the forces exerted on the first rack by both, thereby ensuring that the first rack is always coaxially arranged with the reciprocating linear motor, ensuring force balance, effectively preventing deformation of the first rack, and extending the service life of the electric nail gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 : A cross-sectional view of the overall structure of a preferred embodiment of the utility model;

[0023] Figure 2 : A partial structural cross-sectional view of the initial state of the preferred embodiment of the utility model;

[0024] Figure 3 : An end view of the initial state of the preferred embodiment of the utility model;

[0025] Figure 4 : A top view of the initial state of the preferred embodiment of the utility model;

[0026] Figure 5 : A partial structural cross-sectional view of the terminal state of a preferred embodiment of the utility model;

[0027] Figure 6 : The end view of the terminal state of the preferred embodiment of the utility model;

[0028] Figure 7 : A top view of the terminal state of a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0029] The purpose, advantages and features of the present invention will be illustrated and explained through the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0030] like Figures 1 to 7 As shown, the utility model discloses an electric nail gun, including a housing 10; a reciprocating linear motor 1, a first rack 2, and a second rack 3 are arranged in the housing 10. The first rack 2 is arranged at the output end of the reciprocating linear motor 1 and is driven thereby to produce reciprocating motion. The reciprocating linear motor 1 can be arranged in the housing 10 in a horizontal direction or obliquely; that is, the first rack 2 and the second rack 3 can be arranged at an angle, and the angle range between the two can be between 0°-180°, and further, the optimal angle range is preferably between -30°-90°; the angle between the first rack 2 and the second rack 3 can be adjusted according to the use requirements to meet the nailing requirements of different use places, so as to achieve the best ergonomic design.

[0031] The first rack 2 and the second rack 3 are linked via a gear set, so that the reciprocating motion of the first rack 2 is transmitted to form the reciprocating motion of the second rack 3 .

[0032] Specific, combined Figure 1 , Figure 2 and Figure 5 As shown, the gear set includes a first gear 21 and a second gear 22 that are coaxially fixed, wherein the first rack 2 is meshed with the first gear 21, and the second rack 3 is meshed with the second gear 22. Further, the radius and the number of teeth of the second gear 22 are greater than the radius and the number of teeth of the first gear 21. It can be seen that after starting the reciprocating linear motor 1, the first gear 21 and the second gear 22 move synchronously along the setting direction of the first rack 2, and the second gear 22 rotates and drives the second rack 3 to reciprocate along its axial direction. The stroke transmission is realized by the first gear 21 and the second gear 22, and the second gear 22 amplifies the stroke of the first gear 21, so as to realize the short-stroke reciprocating linear motor driven nailing operation. Further, in the present application, it is preferred to design the output stroke of the electric nail gun to be 55mm, and its stroke transmission ratio is preferably 5.5:1. In other embodiments, the output formation and transmission ratio of the electric nail gun can be adjusted according to demand. The smaller the transmission ratio, the smaller the volume of the transmission mechanism. Therefore, compared with the prior art, the present application has the advantages of compact structure, small volume and easy to carry.

[0033] Furthermore, in the present application, the first rack 2 is preferably as follows Figure 4 or Figure 7 The double-tooth structure shown, that is, the upper and lower surfaces of the first rack 2 are evenly distributed with meshing teeth. The housing 10 is also provided with a balancing gear 23 meshing with the first rack 2, and the balancing gear 23 and the first gear 21 are arranged on both sides of the first rack 2 opposite to each other to balance the normal force of the first rack 2; and the balancing gear 23 and the first gear 21 are exactly the same model, making the overall design more economical and simple. The balancing gear 23 always applies a certain force to one side of the first rack 2, effectively preventing the first gear 21 from applying a force to the first rack 2 during the movement on the first rack 2, causing the first rack 2 to be offset due to the unidirectional force, affecting the concentricity of the first rack 2 and the reciprocating linear motor 1. The balancing gear 23 and the first gear 21 can offset each other's forces on the first rack 2 during the movement on the first rack 2, ensuring that the first rack 2 is always coaxially arranged with the reciprocating linear motor 1, ensuring the concentricity of the two so that the forces are balanced, effectively preventing the first rack 2 from being deformed, and extending the service life of the electric nail gun.

[0034] like Figure 3 or Figure 6 As shown, in the present application, two first racks 2 are preferably provided, and the tails of the two first racks 2 are fixedly connected to the output end of the reciprocating linear motor 1, each first rack 2 is meshed with one first gear 21, and the second gear 22 is located between the two first gears 21, and in the present application, the second gear 22 is preferably a half gear structure, which can effectively reduce the overall mass of the electric nail gun and achieve lightweight. It can be seen that the first rack 2 is symmetrically arranged on both sides of the axis of the motor shaft of the reciprocating linear motor 1, and the second gear 22 is centrally arranged between the two first racks 2, which further increases the structural stability and ensures the balance of the overall structure.

[0035] like Figures 2 to 6As shown, the second rack 3 is preferably a single-tooth structure, one end of which is fixed with a striker bracket 4. Specifically, the striker bracket 4 is connected to the slide bar 51 through a guide sleeve 405; the slide bar 51 is fixed on the slide bar bracket 5, and is arranged in parallel on both sides of the second rack 3. A bearing structure can be optionally provided between the guide sleeve 405 and the slide bar 51 to further reduce the friction between the striker bracket 4 and the slide bar 51. A striker 41 is provided on the striker bracket 4, and the striker 41 is arranged parallel to the second rack 3. The second rack 3 is driven by the second gear 22 to reciprocate along a setting direction parallel to the slide bar 51. At the same time, the slide bar 51 can limit and guide the second rack 3, effectively preventing the first rack 3 from shaking or deviating during movement, and ensuring that the electric nail gun can normally and stably output the nails to be installed. As shown Figure 1 As shown, the nails to be installed are arranged in the nail clamp chamber 6, and the nail clamp chamber 6 is arranged on one side of the housing 10 and is perpendicular to the arrangement direction of the striker 41. The outlet of the nail clamp chamber 6 is connected to the striker channel, and the striker 41 acts on the nail located at the outlet of the nail clamp chamber 6 and discharges it from the outlet of the striker channel to achieve the nailing operation.

[0036] like Figures 2 to 3 or Figures 5 and 6 As shown, a buffer body 52 is provided at the bottom end of the slide bar 51, and the buffer body 52 includes a buffer spring and an elastic body, and the buffer spring is arranged between the elastic body and the slide bar bracket 5. The buffer body 52 performs a buffering process before the striker bracket 4 moves downward to the limit position, effectively reducing the rupture of the striker bracket or the slide bar bracket caused by hard contact, and extending their service life.

[0037] Furthermore, an energy storage spring 53 is provided between the striker bracket 4 and the slide rod bracket 5. When the striker bracket 4 is driven by the second gear 22 to move upward, the energy storage spring 53 can reduce the collision between the second rack 3 and the slide rod bracket 52, ensuring that the stroke of the striker 41 remains unchanged. At the same time, during the downward movement of the striker bracket 4, the energy storage spring 53 exerts a certain force on it, so as to effectively prevent the nail from being stuck between the outlet of the nail clamp cavity 6 and the striker channel, thereby improving the nailing efficiency.

[0038] There are many implementation methods of the utility model, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. An electric nail gun, characterized in that: The invention comprises a housing (10); a reciprocating linear motor (1), a first rack (2), and a second rack (3) are arranged in the housing (10); the first rack (2) is arranged at the output end of the reciprocating linear motor (1) and is driven thereby to generate reciprocating motion; a striker bracket (4) is fixed to one end of the second rack (3); a striker (41) is arranged on the striker bracket (4), and the striker (41) is arranged parallel to the second rack (3); the first rack (2) and the second rack (3) are linked via a gear set, so that the reciprocating motion of the first rack (2) is transmitted to form the reciprocating motion of the second rack (3).

2. An electric nail gun according to claim 1, characterized in that: The gear set comprises a first gear (21) and a second gear (22) which are coaxially fixedly arranged, the radius and the number of teeth of the second gear (22) being greater than the radius and the number of teeth of the first gear (21), the first rack (2) being meshed with the first gear (21), and the second rack (3) being meshed with the second gear (22); the first gear (21) and the second gear (22) are synchronously driven by the first rack (2) and perform rotational motion.

3. An electric nail gun according to claim 2, characterized in that: The first rack (2) is a double-tooth structure.

4. The electric nail gun according to claim 3, characterized in that: A balancing gear (23) meshing with the first rack (2) is also provided in the housing (10); the balancing gear (23) and the first gear (21) are arranged on both sides of the first rack (2) opposite to each other, so as to balance the normal force of the first rack (2).

5. The electric nail gun according to claim 4, characterized in that: The balancing gear (23) is of exactly the same model as the first gear (21).

6. The electric nail gun according to claim 5, characterized in that: The second gear (22) is a half gear structure.

7. An electric nail gun according to any one of claims 2 to 6, characterized in that: There are two first racks (2), the tails of which are fixedly connected to the output end of the reciprocating linear motor (1), each first rack (2) is meshed with one of the first gears (21), and the second gear (22) is located between the two first gears (21).

8. An electric nail gun according to any one of claims 1 to 6, characterized in that: The striker bracket (4) is connected to the slide bar (51) via a guide sleeve (405); the slide bar (51) is fixed on the slide bar bracket (5) and is arranged parallel to the second rack (3).

9. The electric nail gun according to claim 8, characterized in that: A buffer body (52) is provided at the end of the slide rod (51), the buffer body (52) comprising a buffer spring and an elastic body, the buffer spring being provided between the elastic body and the slide rod bracket (5).

10. The electric nail gun according to claim 9, characterized in that: An energy storage spring (53) is also provided between the striker bracket (4) and the slide rod bracket (5).

Images