CN117260632A - Sleeved type force supply mechanism and nail gun - Google Patents

Abstract

The utility model belongs to the technical field of fastening equipment, and relates to a sleeved force supply mechanism and a nail gun. The nail gun of the present utility model has a driving device with a sleeved force supply mechanism. The sleeved force supply mechanism comprises a cylinder body, a rod seat, a nail shooting rod and a spring unit, wherein the spring unit is freely installed between the rod seat and the rear side part, the spring unit is provided with at least two spring groups, each spring group comprises at least one inner spring and an outer spring sleeved with the at least one inner spring, and the spiral direction of the outer spring is opposite to that of the adjacent inner spring of the outer spring. Each spring group can form a larger comprehensive elastic coefficient in a unit space to provide larger nail shooting power so as to meet the requirement of high-power nail shooting gun. In addition, the spiral directions of the two springs are opposite, so that the internal spring and the external spring can be prevented from interfering with each other when being compressed or stretched, and the internal energy loss is reduced.

Description

Sleeved type force supply mechanism and nail gun

Technical Field

The utility model belongs to the technical field of fastening equipment, and relates to a sleeved force supply mechanism and a nail gun.

Background

At present, most of the existing nailing guns are pneumatic nailing guns, the pneumatic nailing guns need to supplement air pressure, auxiliary equipment such as an air compressor needs to be connected through special wires when in use, and the pneumatic nailing gun is easy to be constrained by the length of the wires and the auxiliary equipment during operation, so that the pneumatic nailing gun is not convenient enough.

The Chinese patent with the patent number 201921395877.X discloses a nailing gun, which comprises a gun body, a gun clip assembly and a nailing member, wherein the gun body comprises a power supply mechanism and a nailing gun nozzle, the gun clip assembly is arranged on the nailing gun nozzle, the inner end of the nailing member is inserted into the power supply mechanism, the outer end of the nailing member is arranged on the nailing gun nozzle, a driving mechanism is further arranged on the gun body and comprises a driving motor, a driving wheel is rotatably arranged on the driving motor, a plurality of teeth are distributed on the driving wheel, and a plurality of tooth sockets matched with the teeth are formed on the nailing member.

The force supply mechanism comprises a guide cylinder and a driving spring, the driving motor enables the nailing member to move back to the nailing direction through the driving wheel, so that the driving spring is compressed, then, the driving wheel is separated from the nailing member, and the nailing member is ejected at a high speed under the action of the driving spring, so that nailing is realized. Compared with a pneumatic nailing gun, the pneumatic nailing gun does not need auxiliary equipment such as an air compressor and the like, and does not need an air pipe for connection, so that the structure of the nailing gun is greatly simplified, and the pneumatic nailing gun is convenient to carry and operate.

However, this type of nailing gun has a problem of insufficient nailing force, and cannot meet the nailing requirements of high-power nailing guns.

Disclosure of Invention

In order to solve the above problems, a sleeved force supply mechanism and a nail gun are provided.

The utility model adopts the following technical scheme:

the utility model complements a sleeved force supply mechanism, which comprises: a cylinder disposed within the nail gun and having a front side and a rear side; the rod seat is movably arranged in the cylinder body and divides the cylinder body into a front side cavity and a rear side cavity; the nail shooting rod is fixedly combined with the rod seat and provided with a nail shooting end extending out of the front side part for shooting nails; a spring unit freely installed between the lever seat and the rear side portion, wherein the spring unit has at least two spring groups, each of which includes at least one inner spring and an outer spring sheathing the at least one inner spring inside; the outer spring is opposite to the spiral direction of the inner spring adjacent to the outer spring.

The sleeved force supply mechanism provided by the utility model can also have the characteristic that the spring group comprises more than two inner springs with different diameters, the inner springs and the outer springs are coaxially arranged, and the spiral directions of the adjacent two inner springs are opposite.

The sleeved force supply mechanism of the present utility model may be characterized in that the spring group includes a plurality of inner springs having the same diameter, and the plurality of inner springs are arranged inside the outer spring in a central symmetry manner.

The sleeved force supply mechanism supplemented by the utility model can also have the characteristic that the at least two spring groups are arranged in parallel and symmetrically distributed around the central extension line of the nail shooting rod.

The sleeved force supply mechanism supplemented by the utility model can also have the characteristic that the spring unit comprises: at least two layers of spring parts are distributed along the moving direction of the rod seat; and the linkage piece is arranged between two adjacent layer spring parts and is used for enabling the two layers of layer spring parts to be linked, and each layer spring part is provided with at least one spring group.

The sleeved force supply mechanism supplemented by the utility model can also have the characteristic that the spiral direction of the outer spring of each layer of the spring part is the same; the outer springs of the adjacent two layers of the spring parts are opposite in spiral direction.

The sleeved force supply mechanism according to the present utility model may be characterized in that the layer spring portion provided near the front side portion is a front layer spring portion, the layer spring portion provided near the rear side portion is a rear layer spring portion, the front layer spring portion and the rear layer spring portion have different overall elastic coefficients, and the front layer spring portion or the rear layer spring portion has at least two spring groups arranged in parallel and are symmetrically distributed around a central extension line of the nail rod.

The sleeved force supply mechanism supplemented by the utility model can also have the characteristic that the rod seat comprises a front buffer piece for buffering the vibration of the front layer spring part; the rear side portion includes a rear cushion for cushioning vibrations of the rear spring portion.

The sleeved force supply mechanism supplemented by the utility model can also have the characteristics that a plurality of symmetrically arranged guide rods are arranged in the cylinder body, two ends of each guide rod are respectively fixed with the front side part and the rear side part, the rod seat is movably arranged on the guide rods, at least one layer of spring part comprises spring groups with the same number as the guide rods, and each group of spring groups is respectively arranged on the corresponding guide rods; the linkage piece is provided with a plurality of mounting parts movably arranged on the guide rod and at least one guide rod part; one end of the other layer spring part is arranged on the guide rod part, and the other end of the other layer spring part is arranged on the rear side part of the cylinder body or the rod seat.

The utility model complements a driving device which is arranged in a nail gun and is used for supplementing the power of a nail, and is characterized by comprising the following components: the sleeved force supply mechanism is used for supplementing the power of the nail shooting; and the driving mechanism is used for driving the sleeved force supply mechanism to generate power, wherein the force supply mechanism is the sleeved force supply mechanism.

The utility model complements a nail gun, which is characterized by comprising: and the driving device is used for supplementing the power of the nail shooting, wherein the driving device is the driving device.

The actions and effects of the utility model

The nail gun has a driving device and the driving device is provided with a sleeved type force supply mechanism. The sleeved force supply mechanism comprises a cylinder body, a rod seat, a nail shooting rod and a spring unit, wherein the spring unit is freely installed between the rod seat and the rear side part, the spring unit is provided with at least two spring groups, each spring group comprises at least one inner spring and an outer spring sleeved with the at least one inner spring, and the spiral direction of the outer spring is opposite to that of the adjacent inner spring of the outer spring. Each spring group consists of an inner spring and an outer spring, and after the inner spring and the outer spring are combined with each other, a larger comprehensive elastic coefficient can be formed in a unit space to supplement larger nail shooting power, so that the high-power nail shooting gun is satisfied. In addition, the spiral directions of the two springs are opposite, so that the internal spring and the external spring can be prevented from interfering with each other when being compressed or stretched, and the internal energy loss is reduced; and the combined force of the two can be more concentrated.

In addition, the layer spring portion that sets up near the front portion is as preceding layer spring portion, and the setting is near the back side the layer spring portion is as back layer spring portion, preceding layer spring portion and back layer spring portion's comprehensive elasticity coefficient is different, can make the spring unit rebound after penetrating the nail in-process, through the different acceleration that leads to of the different resilience force of two layer spring portions, causes two layer spring portions to cushion each other, reduces the acceleration of resilience to offset partial resilience force. The impact force acting on the cylinder body is reduced, and the vibration reduction effect is realized. Meanwhile, the rebound acceleration is reduced, so that the vibration time of the spring unit is also reduced, the working stability of the nail gun is ensured, and the labor intensity of a user is reduced.

Drawings

FIG. 1 is a schematic view of the nail gun of the present utility model;

FIG. 2 is a schematic view of the structure of the force supply mechanism, the driving mechanism and the gun nozzle of the present utility model;

FIG. 3 is a schematic view of the structure of the force supply mechanism and the gun nozzle of the present utility model;

FIG. 4 is a cross-sectional view of the drive mechanism and gun nozzle of the present utility model;

FIG. 5 is a cross-sectional view of the force supply mechanism and gun nozzle of the present utility model;

FIG. 6 is a schematic view of the coaxial arrangement of the spring package of the present utility model;

FIG. 7 is a schematic view of a symmetrical arrangement of a plurality of inner springs in a spring stack according to the present utility model;

FIG. 8 is a cross-sectional view of a second force providing mechanism of the present utility model;

FIG. 9 is a cross-sectional view of a third force supply mechanism of the present utility model;

FIG. 10 is a schematic illustration of one dimension of the inner spring of the present utility model;

fig. 11 is a schematic dimensional view of the outer spring of the present utility model.

1-a force supply mechanism; 2-a driving mechanism; 3-a housing; a 4-lithium battery module; 5-gun nozzle; 6-a nail feeding device; 11-a cylinder; 111-front side; 112-a rear side; 12-a rod seat; 13-shooting a nail rod;

14-layer spring portion; 141-a spring set; 1411-an inner spring; 1412-outer springs; 15-a linkage piece; 151-mounting part; 152-a guide rod portion; 16-a guide bar; 17-a cushioning member; 18-front cushioning; 19-rear cushioning;

20-driving a platform; 21-notched gears; 211-tooth; 212-notch portion; 22-speed reducer; 23-driving a motor; 24-cam; 25-limit switches; 26-drive teeth.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings and examples.

Embodiment one:

FIG. 1 is a schematic view of the structure of the nail gun of the present utility model.

As shown in fig. 1, the nail gun includes a gun nozzle 5, a nail feeding device 6, a driving device, a lithium battery module 4, and a housing 3.

The gun nozzle 5 is internally provided with a transmitting channel and is provided with a shooting outlet used for shooting nails; the nail feeding device 6 is provided with a nail passing channel, nails are arranged in the nail passing channel, and the emission channel is connected with the nail passing channel; the rear end of the gun nozzle 5 is provided with a driving device for driving the nail. The driving device is externally wrapped with a shell 3, a handle extends behind the shell 3, a lithium battery module 4 for supplementing energy to the driving mechanism 2 is arranged at the lower end of the handle, and a nail shooting switch for controlling the driving device is arranged at the upper end of the handle.

FIG. 2 is a schematic diagram of the structure of the force supply mechanism, the driving mechanism and the gun nozzle of the present utility model.

As shown in fig. 2, the drive device includes a force supply mechanism 1 and a drive mechanism 2.

Wherein, the force supply mechanism 1 is arranged at the rear end of the gun nozzle 5 and is used for supplementing the power for striking nails; the driving mechanism 2 is provided on one side of the force supply mechanism 1 as an external device of the force supply mechanism 1 for controlling the force supply mechanism 1 to strike nails.

Fig. 3 is a schematic structural view of the force supply mechanism and the gun nozzle of the present utility model, and fig. 4 is a sectional view of the driving mechanism and the gun nozzle of the present utility model.

As shown in fig. 3 and 4, a driving platform 20 is integrally formed on one side of the front side 111, a driving mechanism 2 is arranged on the driving platform 20, and the driving mechanism 2 comprises driving teeth 26 arranged on one side of the nail shooting rod 13, a notch gear 21 mounted on the driving platform 20, a speed reducer 22 and a driving motor 23.

The output end of the driving motor 23 is connected with the input end of the speed reducer 22, the notch gear 21 is arranged at the output end of the speed reducer 22, and the notch gear 21 is provided with a tooth part 211 meshed with the driving tooth 26 and a notch part 212 not meshed with the driving tooth 26.

Wherein, for easy installation, the driving platform 20 is perpendicular to the working surface of the front side 111. The driving motor 23 is mounted on the lower end face of the driving platform 20 through a speed reducer 22, and the notch gear 21 is mounted on the upper end face of the driving platform 20. A cam 24 and a limit switch 25 are also arranged above the notch gear 21, and the cam 24 and the notch gear 21 synchronously rotate. When the convex portion of the cam 24 touches the limit switch 25, the limit switch 25 controls the drive motor 23 to stop rotating.

The lithium battery module 4 supplies power to the driving motor 23, and the nail shooting switch is used for controlling the driving motor 23 to work.

The driving teeth 26 are provided on the side of the nail shooting bar 13 near the notch gear 21, and intermesh with the teeth 211 of the notch gear 21. Wherein the length of all the driving teeth 26 is adapted to the compressed length of the spring unit, and the number of teeth 211 is adapted to the number of teeth of all the driving teeth 26. In this embodiment, the tooth 211 occupies about 3/4 of the circumference of the tooth theory of the notch, the notch 212 occupies about 1/4 of the circumference of the tooth theory of the notch, and at this time, the notch gear 21 rotates 270 °, the moving amount of the nail shooting rod 13 is required to satisfy the compression of the spring unit to the nail shooting position.

When the tooth part 211 is meshed with the driving tooth 26, the rotation of the notch gear 21 can drive the nail shooting rod 13 to move; when the notch 212 is opposite to the nail-shooting bar 13, that is, the tooth 211 does not engage with the driving tooth 26, the nail-shooting bar 13 is in a state of being restrained by the notch-free gear 21, and thus nail shooting can be achieved.

Fig. 5 is a cross-sectional view of the force supply mechanism and gun nozzle of the present utility model.

As shown in fig. 5, the force supply mechanism 1 includes a cylinder 11, a rod seat 12, a nail shooting rod 13, a spring unit, and a buffer member 17.

The cylinder 11 is made of a metal material, and the cylinder 11 has a front side 111 and a rear side 112, and the front side 111 and the rear side 112 may be integrally formed at front and rear ends of the cylinder or may be separately disposed at the front and rear ends of the cylinder. In this embodiment, the front and rear ends of the cylinder 11 are respectively fixed with a front side 111 and a rear side 112 by screws, and the front side 111 is provided with the gun nozzle 5.

The cylinder 11 is provided with a plurality of symmetrically arranged guide rods 16, two ends of each guide rod 16 are respectively fixed with the front side part 111 and the rear side part 112, and the rod seat 12 is movably arranged on the guide rods 16. Specifically, the front and rear ends of the guide rod 1 are provided with mounting posts, the front side 111 and the rear side 112 are provided with mounting grooves adapted to the corresponding shapes of the mounting posts, and the guide rod 1 is fixed in the cylinder 11 through the mounting grooves.

The inside movable mounting of cylinder body 11 has pole seat 12 and penetrates nail pole 13, offer the mounting hole with guide bar 16 looks adaptation on the pole seat 1, pole seat 1 is through the mounting hole activity setting on the guide bar 16, pole seat 12 is cut apart cylinder body 11 into front side chamber and rear side chamber. The nail-shooting bar 13 has a mounting end mounted on the bar base 12 and a nail-shooting end extending from the front side 111 for striking a nail. Specifically, a mounting post is extended from the middle of the front end surface of the rod seat 12, a mounting groove is provided on the mounting post, and the mounting end of the nail shooting rod 13 is inserted in the mounting groove and fixedly connected through a mounting pin. The firing end of the shank 13 extends through the front side 111 and into the firing channel of the gun nozzle 5 and is used to strike a nail.

A spring unit is freely mounted between the rod seat and the rear side, wherein the spring unit has at least two spring groups 141, each of the spring groups 141 comprising at least one inner spring 1411 and an outer spring 1412 having the at least one inner spring pocket 1411 provided therein, the outer spring 1412 being in a spiral direction opposite to the inner spring 1411 adjacent to the outer spring 1412.

The spring groups 141 are arranged in parallel, sleeved on the corresponding guide rods 16, and symmetrically distributed around the central extension line of the nail shooting rod 13.

In this embodiment, two spring sets are provided, two guide rods 16 are also provided, the two spring sets are vertically distributed in the inner cavity of the cylinder 11, and each spring set is sleeved on a corresponding guide rod 16 and symmetrically distributed around the central extension line of the nail shooting rod 13. In this way, the resultant force of the spring assembly can be effectively concentrated on the nail shooting rod 13 during nail shooting.

The spring set comprises an inner spring 1411 and an outer spring 1422 which are the same in length, are coaxially arranged and sleeved on the same guide rod 16.

The spring assembly of this embodiment has the following advantages:

1. on the premise of not enlarging the cylinder body 11, the comprehensive elastic coefficient of the spring group is increased to obtain the elastic force as large as possible, so that the spring group can generate larger nail shooting power.

2. The ratio of the maximum load force of the outer spring 1422 to the maximum load force of the inner spring 1411 is 5:2.

3. to ensure concentric relationship of the combination springs, the inner and outer springs 1411, 1422 are counter-helical in direction, thus preventing the inner and outer springs from skewing or interfering with each other during compression or extension.

4. Because the rotation direction and the load of the spring are different, the generated resonance is not in the same frequency, and the vibration after acting is greatly reduced, thereby improving the comfort degree after nailing.

The front end of the spring group is provided with a front buffer piece 18, the rear end of the spring group is provided with a rear buffer piece 19, and the front buffer piece 18 and the rear buffer piece 19 are annular and sleeved on the corresponding guide rods 16.

Further, the inner wall of the front side 111 of the cylinder 11 is provided with a damper 17, and the outer edge of the damper 17 abuts against the inner wall of the metal cylinder 11. After the shooting, the rod seat 12 hits the buffering member 17, the buffering member 17 contracts, and the impact force is rapidly transmitted to the cylinder 11, thereby achieving rapid transfer and dissipation.

Wherein the cushioning members 17, the front cushioning members 18, and the rear cushioning members 19 are all made of rubber or elastic plastic.

< modification 1-1>

FIG. 6 is a schematic view of the coaxial arrangement of the spring package of the present utility model; FIG. 7 is a schematic view of a symmetrical arrangement of a plurality of innersprings in a spring stack in accordance with the utility model.

When the spring stack contains a plurality of inner springs, the following nested form exists:

first suit form: the spring group comprises more than two inner springs with different diameters, the inner springs and the outer springs are coaxially arranged, and spiral directions of two adjacent inner springs are opposite.

As shown in fig. 6, the spring set includes two inner springs 1411 and one outer spring 1412 with different diameters, which are sequentially sleeved on the same guide rod 16 according to the diameters, the smaller the diameter of the inner spring is, the closer the inner spring is to the guide rod 16, the smaller diameter of the inner spring 1411 is consistent with the spiral direction of the outer spring 1412, and the spiral direction of the middle inner spring 1411 is opposite to the spiral direction of the other two.

The spring assembly of this modification has the following advantages:

1. on the premise of not enlarging the cylinder body 11, the comprehensive elastic coefficient of the spring group can be further increased, and larger nail shooting power is provided.

2. Through different setting modes of the spiral direction, the concentric relation of the combined springs can be ensured, and the inner spring and the outer spring are prevented from being skewed or interfering with each other.

3. Because the rotation direction, the mass and the rigidity of the springs are different, the vibration frequencies of the springs are inconsistent after compression and release work, so that the springs cannot resonate, and the reaction forces of the springs can offset one part of the springs, so that the vibration after work is greatly reduced, the vibration reduction effect and the nailing effect are improved, and the nailing is more labor-saving and comfortable.

4. Under the condition of obtaining certain spring force, the spring set has the advantages of small volume, convenient installation and the like.

Second suit form: the spring group comprises a plurality of inner springs with the same diameter, and the inner springs are symmetrically arranged inside the outer springs.

As shown in fig. 7, the spring group includes three inner springs 1411 and one outer spring 1412 with the same diameter, and the three guide rods 16 are uniformly distributed circumferentially around the central extension line of the nail-shooting rod 13. The inner springs 1411 are arranged in parallel and are respectively sleeved on the corresponding guide rods 16.

Wherein the spiral direction of the two inner springs 1411 is opposite to the spiral direction of the outer spring 1412, and the spiral direction of the other inner spring 1411 is the same as the spiral direction of the outer spring 1412.

This modification makes full use of the space inside the outer spring 1412, and increases the overall spring rate of the spring assembly.

Compared with the first sleeving form, the inner springs 1411 in the second sleeving form are respectively sleeved on the corresponding guide rods 16, and the positions of the inner springs are relatively fixed, so that the possibility of collision between the springs can be greatly reduced, and interference between the springs is avoided.

Embodiment two:

the present embodiment provides the structure of the second force supply mechanism:

the spring unit has at least two layers of spring portions 14 and a linkage piece 15.

The layer spring portions 14 are arranged along the moving direction of the lever seat. Wherein each layer of the spring part has at least one spring group, each spring group 141 comprises at least one inner spring 1411 and an outer spring 1412 having the at least one inner spring sleeve 1411 disposed therein, and the outer spring 1412 is opposite to the inner spring 1411 adjacent to the outer spring 1412 in spiral direction.

The linkage piece 15 is disposed between two adjacent layer spring portions and is used for linking the two layer spring portions.

When the layer spring portion 14 of each layer has only one group of spring groups 141, all the spring groups 141 may be arranged in series, and the spring groups 141 of adjacent layers may be combined by the linkage piece.

In this embodiment, the integrated elastic coefficients of the two-layer spring portions are set to be different. Because the comprehensive elastic coefficients of the two layers of spring parts are different, the spring unit can rebound after shooting nails, and different accelerations caused by different rebound forces of the two layers of spring parts cause the two layers of spring parts to buffer each other, so that rebound acceleration is reduced, and the rebound force of the portion is offset. The impact force acting on the cylinder body is reduced, and the vibration reduction effect is realized. Meanwhile, the rebound acceleration is reduced, so that the vibration time of the spring unit is also reduced, the working stability of the nail gun is ensured, and the labor intensity of a user is reduced.

In addition, in the same spring set 141, the resonance generated by the different rotation directions and loads of the inner spring sleeve 1411 and the outer spring 1412 is not in the same frequency, so that the vibration after working can be further reduced, and the comfort degree after nailing can be further improved.

< modification example 2-1>

Fig. 8 is a cross-sectional view of a second force supply mechanism of the present utility model.

As shown in fig. 8, the layer spring portion disposed near the front side portion serves as a front layer spring portion, the layer spring portion disposed near the rear side portion serves as a rear layer spring portion, and the front layer spring portion or the rear layer spring portion has at least two spring groups disposed in parallel and is symmetrically distributed around a central extension line of the nail-shooting rod.

Preferably, the outer spring spiral direction of each layer of the layer spring portion is the same; the outer springs of the adjacent two layers of the spring parts are opposite in spiral direction. Specifically, in the front layer spring portion, the spiral direction of the outer springs 1412 of the spring groups arranged in parallel is the same as the spiral direction of the outer springs 1412 of the spring groups of the rear layer spring portion.

Because the rotation direction and the load of the spring are different, the generated resonance is not in the same frequency, and the vibration after acting is greatly reduced, thereby improving the comfort degree after nailing.

In this embodiment, two parallel spring groups 141 are disposed in the front layer spring portion, and one group 141 is disposed in the rear layer spring portion.

As shown in fig. 10, there is provided a dimensional parameter of the inner spring 1411 having a spring outer diameter of 15.5mm, a length of 86mm, a pitch of 5.6mm, and a spring wire diameter of 1.5mm.

As shown in fig. 11, there is provided a dimensional parameter of the outer spring 1412 having a spring outer diameter of 20.6mm, a length of 86mm, a pitch of 9.7mm and a spring wire diameter of 2.5mm.

Two symmetrically arranged guide rods are arranged in the cylinder body, two ends of each guide rod are respectively fixed with the front side part and the rear side part, and the rod seat is movably arranged on a plurality of guide rods 16. The spring groups 141 of the front spring part are respectively sleeved on the corresponding guide rods 16.

In order to facilitate the installation with the rear spring portion, the linkage piece 15 has a plurality of installation portions 151 movably provided on the guide bar 16 and at least one guide bar portion 152. The two mounting portions 151 are provided, and the two mounting portions are provided with mounting holes adapted to the shape of the guide rod, and are sleeved on the guide rod 16, and the mounting portions 151 abut against one end of the spring group 141 corresponding to the front layer spring portion. The guide rod portion 152 is extended from the center of the rear side of the linkage piece 15, one end of the rear spring portion is mounted on the guide rod portion 152, and the other end is mounted on the rear side portion 112 of the cylinder 11.

As shown in FIG. 8, the combination mode of connecting the internal and external spring sets in series is adopted, and under the condition of certain resultant force of the springs, the spring sets connected in series are equally divided into corresponding force values, so that the spring sets can be prevented from being excessively compressed, the springs of the spring sets are prevented from being prematurely fatigued, and the service life of the springs is prolonged.

If a group of spring groups 141 are arranged in the front layer spring part, and two groups of parallel spring groups 141 are arranged in the rear layer spring part, the position of the linkage piece 15 is reversed, so that one end of the front layer spring part is arranged on the guide rod part 152, and the other end is arranged on the rod seat 12.

In order to further improve the vibration damping effect, the lever seat includes a front buffer 18 for buffering the vibration of the front layer spring portion; the rear side portion includes a rear cushion 19 for cushioning vibrations of the rear spring portion.

< modification example 2-2>

Fig. 9 is a cross-sectional view of a third force supply mechanism of the present utility model.

As shown in fig. 9, two parallel spring groups 141 are provided in the front layer spring portion of the present embodiment, and two parallel spring groups 141 are also provided in the rear layer spring portion. The two spring groups 141 of the front layer spring part and the rear layer spring part are respectively sleeved on the two guide rods 16 and interact with each other through the linkage piece 15, and the linkage piece 15 only has two mounting parts 151 movably arranged on the guide rods 16.

As shown in fig. 9, this modification can provide a larger driving force than modification 2-1.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model in this way, therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (10)

1. A power mechanism is established to cover, installs in the nail gun for provide the power of penetrating the nail, its characterized in that includes:

a cylinder disposed within the nail gun and having a front side and a rear side;

the rod seat is movably arranged in the cylinder body and divides the cylinder body into a front side cavity and a rear side cavity;

the nail shooting rod is fixedly combined with the rod seat and provided with a nail shooting end which extends out of the front side part and is used for shooting nails; and

a spring unit freely installed between the lever seat and the rear side portion,

wherein the spring unit has at least two spring groups,

each spring group comprises at least one inner spring and an outer spring sleeved with the at least one inner spring;

the outer spring is opposite to the spiral direction of the inner spring adjacent to the outer spring.

2. A sleeved force supply mechanism according to claim 1 and wherein:

wherein the spring group comprises more than two inner springs with different diameters,

the inner spring and the outer spring are coaxially arranged,

the spiral directions of the adjacent two inner springs are opposite.

3. A sleeved force supply mechanism according to claim 1 and wherein:

wherein the spring group comprises a plurality of inner springs with the same diameter,

the plurality of inner springs are arranged inside the outer springs in a central symmetry manner.

4. A sleeved force supply mechanism according to any one of claims 1-3 and wherein:

the at least two spring groups are arranged in parallel and symmetrically distributed around the central extension line of the nail shooting rod.

5. A sleeved force supply mechanism according to any one of claims 1-3 and wherein:

wherein the spring unit has:

at least two layers of spring parts are distributed along the moving direction of the rod seat; and

the linkage piece is arranged between two adjacent layer spring parts and is used for linking the two layers of layer spring parts,

each layer of the layer spring part is provided with at least one spring group.

6. The sleeved force supply mechanism of claim 5, wherein:

wherein the outer spring spiral direction of each layer of the layer spring portion is the same;

the outer springs of the adjacent two layers of the spring parts are opposite in spiral direction.

7. The sleeved force supply mechanism of claim 6, wherein:

wherein the layer spring portion provided near the front side portion serves as a front layer spring portion,

the layer spring portion provided near the rear side portion serves as a rear layer spring portion,

the front layer spring part and the rear layer spring part have different comprehensive elastic coefficients,

the front layer spring part or the rear layer spring part is provided with at least two spring groups which are arranged in parallel and symmetrically distributed around the central extension line of the nail shooting rod.

8. The sleeved force supply mechanism of claim 7, wherein:

wherein the rod seat comprises a front buffer piece for buffering the vibration of the front layer spring part;

the rear side portion includes a rear cushion for cushioning vibrations of the rear spring portion.

9. The sleeved force supply mechanism of claim 5, wherein:

wherein a plurality of symmetrically arranged guide rods are arranged in the cylinder body, two ends of each guide rod are respectively fixed with the front side part and the rear side part,

the rod seat is movably arranged on a plurality of the guide rods,

at least one layer of the spring parts comprises the spring groups with the same number as the guide rods,

each group of springs is respectively arranged on the corresponding guide rod;

the linkage piece is provided with a plurality of mounting parts movably arranged on the guide rod and at least one guide rod part;

one end of the other layer spring part is arranged on the guide rod part, and the other end of the other layer spring part is arranged on the rear side part of the cylinder body or the rod seat.

10. A nail gun, comprising:

a driving device, which has:

the sleeved force supply mechanism is used for providing power for shooting nails; and

a driving unit for driving the sleeved force supply mechanism to generate the power,

wherein the sleeved force supply mechanism is the sleeved force supply mechanism of any one of claims 1-9.