WO2023241112A1 - Combined force supply mechanism, driving device, and nail gun - Google Patents

Abstract

A combined force supply mechanism, comprising a cylinder body (11), a rod seat (12), a nail shooting rod (13), and a spring unit, wherein the spring unit is provided with: at least two layers of layered spring portions (14) arranged in a moving direction of the rod seat (12); and a linkage sheet (15) arranged between two adjacent layers of layered spring portions (14) and configured to link the two layers of layered spring portions (14), wherein each layer of layered spring portion (14) comprises at least one force supply spring (141), all of the force supply springs (141) in each layer of layered spring portion (14) are of the same type, and the force supply springs (141) in the two adjacent layers of layered spring portions (14) are of different types. After a plurality of layers of layered spring portions (14) are combined with each other, a larger comprehensive elastic coefficient can be formed in a unit space to supplement a larger nail shooting power and meet the use of a high-power nail gun. The present invention further relates to a driving device having the combined force supply mechanism, and a nail gun having the driving device.

Description

A combined power supply mechanism, driving device and nail gun Technical field

The invention belongs to the technical field of fastening equipment and relates to a combined power supply mechanism, a driving device and a nail gun.

Background technique

At present, most of the existing nailing guns are pneumatic nailing guns. The pneumatic nailing guns require supplementary air pressure. When used, they need to be connected to auxiliary equipment such as air compressors through dedicated wires. During operation, they are easily affected by the length of the wire and the auxiliary equipment. constraints, not convenient enough.

The Chinese utility model patent with patent number 201921395877. On the gun nozzle, the inner end of the nailing component is inserted into the power supply mechanism, and the outer end is set on the nailing gun nozzle. The gun body is also provided with a driving mechanism. The driving mechanism includes a driving motor, and a driving wheel is provided for rotation on the driving motor. , a number of teeth are distributed on the driving wheel, and a number of tooth slots are provided on the nailing member to cooperate with the teeth.

The power supply mechanism includes a guide cylinder and a driving spring. The driving motor moves the nailing component back to the nailing direction through the driving wheel, thereby compressing the driving spring. Then, the driving wheel is separated from the nailing component, and the nailing component is driven by the driving spring. High-speed injection to achieve nail shooting. Compared with the pneumatic nailing gun, it does not require auxiliary equipment such as an air compressor, nor does it require a trachea to connect, which greatly simplifies the structure of the nailing gun, making it easy to carry and operate.

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

Contents of the invention

In order to solve the above problems, a combined power supply mechanism, a driving device and a nail gun are added.

The present invention adopts the following technical solutions:

The invention supplements a combined power supply mechanism, which includes: a cylinder body, which is arranged in the nail gun and has a front side part and a rear side part; a rod base is movably arranged in the cylinder body and divides the cylinder body into The front side cavity and the rear side cavity; the nail shooting rod is fixedly combined with the rod base and has a nail shooting end extending out of the front side for nail shooting; the spring unit is freely installed between the rod base and the rear side part. , wherein the spring unit has: at least two layers of spring parts, arranged along the moving direction of the rod base; and a linkage piece, arranged on two adjacent layers of spring parts. between the two layers and used for linkage between the two layers of spring parts. Each layer of the layer spring parts includes at least one power supply spring, and all the power supply springs in each layer of the layer spring parts are are of the same type; the power supply springs in the spring portions of two adjacent layers are of different types.

The supplementary combined power supply mechanism of the present invention may also have the feature that the power supply spring of the first type serves as the first type of spring, the power supply spring of the second type serves as the second type of spring, and the power supply spring of the second type serves as the second type of spring. The first type of spring and the second type of spring are respectively composed of two different types of equal distance springs, variable distance springs and sleeved springs. The sleeved spring has at least one inner spring and the at least one inner spring is sleeved inside. external spring.

The combined power supply mechanism supplemented by the present invention can also have the feature that the first type of spring and the second type of spring are respectively composed of cylindrical springs, conical springs, medium concave springs, and medium convex springs. Two compositions.

The complementary combined power supply mechanism of the present invention may also have the feature that at least one of the layer spring parts includes a plurality of power supply springs arranged in parallel, and the plurality of power supply springs surround the ejector. The central extension line of the nail rod is symmetrically distributed,

The supplementary combined power supply mechanism of the present invention may also have the feature that the layer spring portion provided near the front side portion serves as the front layer spring portion, and the layer spring portion provided near the rear side portion serves as the front layer spring portion. The layer spring part serves as the rear layer spring part, the comprehensive elastic coefficients of the front layer spring part and the rear layer spring part are different, and the front layer spring part or the rear layer spring part has at least two power supply springs. They are arranged side by side and symmetrically distributed around the central extension line of the nailing rod.

The supplementary combined power supply mechanism of the present invention may also have the following features, wherein the rod base includes a front buffer for buffering the vibration of the front spring part, and the rear side part includes a rear buffer. Component used to buffer the vibration of the rear layer spring part.

The supplementary combined power supply mechanism of the present invention may also have the following features, wherein the cylinder body is provided with a plurality of centrally symmetrically arranged guide rods, and the two ends of each guide rod are respectively connected with the front side part. Fixed to the rear side part, the rod base is movably installed on a plurality of guide rods; at least one of the layer spring parts includes the same number of power supply springs as the guide rods, each One of the power supply springs is respectively installed on the corresponding guide rod.

The complementary combined power supply mechanism of the present invention may also have the following features, wherein the linkage piece has a plurality of mounting parts movably arranged on the guide rod and at least one guide rod part; the layer spring part One end is installed on the guide rod part, and the other end is installed on the rear side part of the cylinder or the rod seat.

The invention supplements a driving device, which is installed in the nail gun and used to supplement the power of nail shooting. It is characterized in that it includes: a combined power supply mechanism, used to supplement the power of nail shooting; and a driving mechanism, used to supplement the power of nail shooting. The combined power supply mechanism is driven to generate power, wherein the power supply mechanism is the above combined power supply mechanism.

The present invention supplements a nail gun, which is characterized in that it includes: a driving device for supplementing the power of nail shooting, wherein the driving device is the above-mentioned driving device.

Invention functions and effects

The nail gun according to the present invention has a driving device, and the driving device has a combined power supply mechanism. The combined power supply mechanism includes a cylinder, a rod base, a nail shooting rod and a spring unit. The spring unit is freely installed between the rod base and the rear side, wherein the spring unit has: at least two Layer-by-layer spring parts are arranged along the moving direction of the rod base; and a linkage piece is provided between two adjacent layers of the layer spring parts and is used to allow the two layers of the layer spring parts to link together, each The spring parts of each layer include at least one power supply spring, and all the power supply springs in the spring parts of each layer are of the same type; the power supply springs in the spring parts of two adjacent layers Springs are of different types. When multiple layers of spring parts are combined with each other, a larger comprehensive elastic coefficient can be formed in the unit space to supplement greater nail driving power and satisfy the use of high-power nail guns.

Wherein, the power supply spring of the layer spring part is a sleeve spring, and the sleeve springs each include at least one inner spring and an outer spring that sleeves the at least one inner spring inside, and the outer spring is opposite to the outer spring. The adjacent inner springs have opposite spiral directions. Each power supply spring is composed of an inner spring and an outer spring. When the two are combined, a larger comprehensive elastic coefficient can be formed in the unit space to supplement greater nail power and satisfy the use of high-power nail guns. In addition, the opposite spiral directions of the two prevent the inner and outer springs from interfering with each other when compressing or extending, reducing internal energy loss; it also helps the combined force of the two to be more concentrated.

Among them, due to the different comprehensive elastic coefficients of the two layers of spring parts, the spring unit can cause different accelerations caused by the different rebound forces of the two layers of spring parts during the rebound process of the two layers of spring parts. Buffering each other, reducing the acceleration of rebound, thereby offsetting part of the rebound force. This also reduces the impact force acting on the cylinder and achieves the vibration damping effect. At the same time, due to the reduced acceleration of rebound, the The vibration time of the spring unit ensures the stability of the nail gun and reduces the user's labor intensity.

Description of the drawings

Figure 1 is a schematic structural diagram of a nail gun according to the present invention;

Figure 2 is a schematic structural diagram of the power supply mechanism, driving mechanism and gun nozzle of the present invention;

Figure 3 is a schematic structural diagram of the power supply mechanism and the gun nozzle of the present invention;

Figure 4 is a cross-sectional view of the driving mechanism and the gun nozzle of the present invention;

Figure 5 is a cross-sectional view of the power supply mechanism and the gun nozzle of the present invention;

Figure 6 is a cross-sectional view of the power supply mechanism of the present invention;

Figure 7 is a schematic structural diagram of the first variable pitch spring of the present invention;

Figure 8 is a schematic structural diagram of the second variable pitch spring of the present invention;

Figure 9 is a schematic structural diagram of the third variable pitch spring of the present invention;

Figure 10 is a schematic structural diagram of the coaxial arrangement of sleeved springs according to the present invention;

Figure 11 is a schematic structural diagram of a plurality of inner springs arranged symmetrically in the sleeve spring of the present invention.

1-power supply mechanism; 2-driving mechanism; 3-casing; 4-lithium battery module; 5-gun nozzle; 6-nail feeding device;

11-cylinder; 111-front side part; 112-rear side part; 12-rod seat; 13-nail rod;

14-layer spring part; 141-power supply spring; 1411-inner spring; 1412 outer spring; 142-variable distance spring; 1421-variable distance section; 1422-equal distance section; 1423-first equal distance section; 1424-th Two equidistant sections; 1425-transition section; 15-linkage piece; 151-installation part; 152-guide rod part; 16-guide rod; 17-buffer member; 18-front buffer; 19-rear buffer;

20-Driving platform; 21-Notch gear; 211-Tooth part; 212-Notch part; 22-Reducer; 23-Driving motor; 24-Cam; 25-Limit switch; 26-Driving teeth.

Detailed ways

Specific implementations of the present invention will be described below with reference to the drawings and examples.

Example 1:

Figure 1 is a schematic structural diagram of a nail gun according to the present invention.

As shown in Figure 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 equipped with a launching channel and has an ejection outlet for shooting nails; the nail feeding device 6 has a nail passing channel, nails are installed in the nail passing channel, and the launching channel is connected to the nail passing channel; the rear end of the gun nozzle 5 A driving device for driving the nail is provided. The driving device is wrapped with a casing 3. A handle extends behind the casing 3. A lithium battery module 4 is installed at the lower end of the handle to replenish energy for the driving mechanism 2. A nail switch for controlling the driving device is disposed at the upper end of the handle.

Figure 2 is a schematic structural diagram of the power supply mechanism, the driving mechanism and the gun nozzle of the present invention, and Figure 3 is a schematic structural diagram of the power supply mechanism and the gun nozzle of the present invention.

As shown in Figure 2, the driving device includes a power supply mechanism 1 and a driving mechanism 2.

Among them, the power supply mechanism 1 is arranged at the rear end of the gun nozzle 5 and is used to supplement the power of striking the nail; the driving mechanism 2 is arranged on one side of the power supply mechanism 1 as an external device of the power supply mechanism 1 and is used to control the power supply. Mechanism 1 strikes the nail.

Figure 4 is a cross-sectional view of the driving mechanism and the gun nozzle of the present invention.

As shown in Figure 4, one side of the front side portion 111 is integrally formed with a driving platform 20. The driving platform 20 is provided with a driving mechanism 2. The driving mechanism 2 includes a driving tooth 26 provided on one side of the nail rod 13 and is installed on the driving platform. Notch gear 21, reducer 22 and drive motor 23 on 20.

The output end of the drive motor 23 is connected to the input end of the reducer 22, and the output end of the reducer 22 is installed with a notched gear 21. The notched gear 21 has a tooth portion 211 that meshes with the driving teeth 26 and a notch portion that does not mesh with the driving teeth 26. 212.

In order to facilitate installation, the working surface of the driving platform 20 and the front side part 111 are perpendicular to each other. The driving motor 23 is installed on the lower end surface of the driving platform 20 through the reducer 22, and the notched gear 21 is installed on the upper end surface of the driving platform 20. A cam 24 and a limit switch 25 are also provided above the notched gear 21, and the cam 24 and the notched gear 21 rotate synchronously. When the convex portion of the cam 24 touches the limit switch 25, the limit switch 25 controls the driving motor 23 to stop rotating.

Among them, the lithium battery module 4 supplies power to the driving motor 23, and the nail switch is used to control the operation of the driving motor 23.

The driving teeth 26 are disposed on the side of the nail rod 13 close to the notched gear 21 and mesh with the tooth portion 211 of the notched gear 21 . The length of all the driving teeth 26 is adapted to the compression length of the spring unit, and the number of teeth of the tooth portion 211 is adapted to the number of teeth of all the driving teeth 26 . In this embodiment, the tooth portion 211 occupies approximately 3/4 of the circumference of the notch tooth circle, and the notch 212 occupies approximately 1/4 of the circumference of the notch tooth circle. At this time, The notched gear 21 rotates 270°, and the movement amount of the nail shooting rod 13 must satisfy the compression of the spring unit to the nail shooting position.

When the tooth portion 211 meshes with the driving teeth 26, the rotation of the notch gear 21 can drive the nail rod 13 to move; when the notch portion 212 faces the nail rod 13, that is, the tooth portion 211 does not mesh with the driving teeth 26, at this time, the nail is fired. The rod 13 is in a state constrained by the notch gear 21 and can realize nail shooting.

Figure 5 is a cross-sectional view of the power supply mechanism and the gun nozzle of the present invention.

As shown in FIG. 5 , the power supply mechanism 1 includes a cylinder 11 , a rod base 12 , a nail rod 13 , a spring unit and a buffer member 17 .

The cylinder body 11 is made of metal material. The cylinder body 11 has a front side part 111 and a rear side part 112. The front side part 111 and the rear side part 112 can be integrally formed at the front and rear ends of the cylinder body, or they can be separately provided at the front and rear ends of the cylinder body. The front and rear ends of the cylinder. This embodiment is arranged in separate parts, that is, the front and rear ends of the cylinder 11 are respectively fixed with a front side part 111 and a rear side part 112 through screws, and the front side part 111 is equipped with a gun nozzle 5 .

The cylinder 11 has a plurality of symmetrically arranged guide rods 16. Both ends of each guide rod 16 are respectively fixed to the front side part 111 and the rear side part 112. The rod base 12 can It is movably mounted on a plurality of guide rods 16. Specifically, the front and rear ends of the guide rod 1 are provided with mounting protrusions, and the front side portion 111 and the rear side portion 112 are provided with mounting grooves that match the shape of the corresponding mounting protrusions, so The guide rod 1 is fixed in the cylinder 11 through the mounting groove.

A rod base 12 and a nailing rod 13 are movably installed inside the cylinder 11. The rod base 1 is provided with a mounting hole that matches the shape of the guide rod 16. The rod base 1 is movably mounted on the guide rod through the mounting hole. 16, the rod seat 12 divides the cylinder 11 into a front side chamber and a rear side chamber. The nailing rod 13 has a mounting end installed on the rod base 12 and a nailing end extending out of the front side 111 for striking nails. Specifically, a mounting post extends from the middle of the front end surface of the rod base 12. The mounting post is provided with a mounting groove. The mounting end of the nail rod 13 is inserted into the mounting groove and is fixedly connected through the mounting pin. The nail end of the nail rod 13 passes through the front side portion 111 and then extends into the firing channel of the gun nozzle 5 and is used to impact nails.

Figure 6 is a cross-sectional view of the power supply mechanism of the present invention.

As shown in FIG. 6 , the spring unit has at least two layers of spring parts 14 and linkage pieces 15 .

The layer spring portion 14 is arranged along the moving direction of the rod base 12 . Wherein, each layer of the layer spring portion 14 has at least one said power supply spring 141, and all the said power supply springs 141 in each layer of the layer spring portion 14 are of the same type. The power supply springs 141 in the layer spring portion 14 are of different types.

The linkage piece 15 is disposed between two adjacent layer spring portions 14 and is used to allow the two layers of the layer spring portions 14 to interlock.

When the layer spring portion 14 of each layer has only one power supply spring 141 , all the power supply springs 141 can be arranged in series, and the power supply springs 141 of adjacent layers are connected through the linkage piece 15 .

The power supply spring of the first type is used as the first type spring, and the power supply spring of the second type is used as the second type spring. The first type spring and the second type spring are respectively composed of an equal distance spring and a variable distance spring. 142. The sleeve spring may have two different configurations, or it may be a cylindrical spring, a conical spring, a concave spring, or a convex spring.

The type of spring in this embodiment is determined by factors such as the shape of the spring, equal distance/variable distance, and assembly method. Different types of springs are different if any of the above factors are different. In addition, the length, diameter, and elastic coefficient of the spring do not affect the type of spring. That is, even if the length, diameter, elastic coefficient and other factors of the spring are different, they are still regarded as the same type of spring.

Wherein, the layer spring portion provided close to the front side portion serves as the front layer spring portion, and the layer spring portion provided close to the rear side portion serves as the rear layer spring portion, and the front layer spring portion and the layer spring portion The rear layer spring portion has different comprehensive elastic coefficients. The front layer spring portion or the rear layer spring portion has at least two power supply springs arranged side by side and symmetrically distributed around the central extension line of the nail shooting rod.

In addition, the spiral directions of the power supply springs of each layer of spring parts are the same; the spiral directions of the power supply springs in two adjacent layers of spring parts are opposite. Specifically, in the front layer spring part, the spiral directions of the power supply springs arranged in parallel in each group are the same, and the spiral directions of the power supply springs in the rear layer spring part are all opposite.

The two layers of spring parts have different comprehensive elastic coefficients, which can cause the spring unit to buffer each other through different accelerations caused by the different rebound forces of the two layers of spring parts during the rebound process of the spring unit after firing the nail. Reduce the acceleration of rebound to offset part of the rebound force. This also reduces the impact force acting on the cylinder and achieves the vibration damping effect. At the same time, due to the reduced acceleration of rebound, the recoil force is also reduced, making nailing more labor-saving and comfortable.

As shown in Figure 6, the spring part of the front layer is provided with two parallel power supply springs 141, and the power supply springs are set springs; the rear layer spring part is provided with one power supply spring 141, and the power supply springs 141 are equidistant springs. .

In this embodiment, there are two power supply springs and two guide rods 16, which are distributed up and down in the inner cavity of the cylinder 11. Each power supply spring is sleeved on a corresponding guide rod 16. on and around The central extension line of the nail rod 13 is symmetrically distributed. In this way, when shooting nails, the resultant force of the power supply spring can be effectively concentrated on the nail shooting rod 13 .

Wherein, the set springs each include at least one inner spring 1411 and an outer spring 1412 that sets the at least one inner spring 1411 inside. The outer spring 1412 is adjacent to the outer spring 1412 in the spiral direction of the inner spring 1411. on the contrary.

Dimensional parameters of the inner spring 1411 and the outer spring 1412 are provided. The outer spring diameter of the inner spring 1411 is 15.5mm, the length is 86mm, the pitch is 5.6mm, and the spring wire diameter is 1.5mm. The outer spring 1412 has a spring outer diameter of 20.6mm, a length of 86mm, a pitch of 9.7mm, and a spring wire diameter of 2.5mm.

As shown in Figure 6, the set spring includes an inner spring 1411 and an outer spring 1422, which are coaxially arranged and sleeved on the same guide rod 16. In a limited space, the comprehensive force supply spring is increased. The elastic coefficient allows it to generate greater nail driving power. The spiral directions of the inner spring 1411 and the outer spring 1422 are opposite, so that they are less likely to interfere or tilt during compression or extension.

In addition to the advantages described above, due to the differences in rotation, mass, and stiffness of the springs, the vibration frequencies after compression and release are inconsistent, so the springs will not resonate, and the reaction forces of the springs will offset part of each other, greatly It reduces the vibration after work, improves the vibration damping effect and nailing effect, and also makes nailing more labor-saving and comfortable.

In addition, as shown in Figure 6, the spring units are arranged in a "triangular" shape, which can make the structure more stable.

In order to facilitate the installation with the rear layer spring part, the linkage piece 15 has a plurality of installation parts 151 movably arranged on the guide rod 16 and at least one guide rod part 152. There are two mounting portions 151 , which have mounting holes matching the shape of the guide rod, and are sleeved on the guide rod 16 . The mounting portion 151 abuts against the front layer. One end of the power supply spring 141 of the spring part. The guide rod portion 152 extends from the center of the rear side of the linkage piece 15. One end of the rear spring portion is installed on the guide rod portion 152, and the other end is installed on the cylinder 11. On the rear side 112. Specifically, the power supply spring of the rear spring portion is the isometric spring, and its spiral direction is opposite to the outer spring 1412 of the front spring portion.

In addition, the comprehensive elastic coefficients of the spring portions of the two layers are set to be different. Since the comprehensive elastic coefficients of the two layers of spring parts are different, the spring unit can buffer each other through different accelerations caused by the different rebound forces of the two layers of spring parts during the rebound process of the spring unit after shooting the nail. , reducing the acceleration of rebound, thereby offsetting part of the rebound force. This also reduces the impact force acting on the cylinder and achieves vibration reduction. effect. At the same time, due to the reduced acceleration of rebound, the vibration time of the spring unit is also reduced, ensuring the stability of the nail gun and reducing the user's labor intensity.

If one power supply spring 141 is provided in the front layer spring part and two parallel power supply springs 141 are provided in the rear layer spring part, it is only necessary to reverse the position of the linkage piece 15 so that one end of the front layer spring part It is installed on the guide rod part 152, and its other end is installed on the rod base 12.

In order to further improve the vibration damping effect, the rod base contains a front buffer 18 for buffering the vibration of the front spring part; the rear side part contains a rear buffer 19 for buffering the rear spring. Cushioning of external vibrations.

In addition, a buffer member 17 is also provided on the inner wall of the front side portion 111 of the cylinder 11 , and the outer edge of the buffer member 17 is close to the inner wall of the metal cylinder 11 . After the nail is fired, the rod base 12 hits the buffer member 17, and the buffer member 17 contracts, and at the same time, the impact force is quickly transmitted to the cylinder 11, thereby realizing rapid transfer and dissipation.

Among them, the buffer member 17, the front buffer 18 and the rear buffer 19 are all made of rubber or elastic plastic.

<Modification 1-1>

When the sleeve spring contains multiple inner springs, there are also the following sets of forms:

Figure 10 is a schematic structural diagram of the coaxial arrangement of the sleeve spring of the present invention, and Figure 11 is a schematic structural diagram of the symmetrical arrangement of multiple inner springs in the sleeve spring of the present invention.

The first set form: the set spring contains two or more inner springs with different diameters, the inner spring and the outer spring are coaxially arranged, and the spiral directions of two adjacent inner springs are opposite.

As shown in Figure 6, the sleeve spring includes two inner springs 1411 with different diameters and an outer spring 1412. The three are sleeved on the same guide rod 16 in sequence according to their diameters. The inner spring with the smallest diameter The spiral direction of 1411 and the outer spring 1412 is consistent, and the spiral direction of the middle inner spring 1411 is opposite to the spiral direction of the other two.

The spring group of this modification has the following advantages:

1. Without enlarging the cylinder 11, the comprehensive elastic coefficient of the spring group can be further increased to provide greater nail shooting power.

2. Through different settings of the spiral directions, the concentric relationship of the combined springs can be ensured and the inner and outer springs can be prevented from being skewed or interfering with each other.

3. Due to the difference in rotation, mass and stiffness of the springs, the vibration frequencies after compression and release are inconsistent with each other, so the springs will not resonate, and the reaction forces of the springs will offset part of each other, greatly reducing the vibration frequency after the work is done. Vibration improves the vibration damping effect and nailing effect, and also makes nailing more labor-saving and comfortable.

4. Under the condition of obtaining a certain spring strength, the spring group has the advantages of small size and easy installation.

The second sleeve form: the sleeve spring contains a plurality of inner springs of the same diameter, and the plurality of inner springs are symmetrically arranged inside the outer spring.

As shown in FIG. 11 , the sleeve spring includes three inner springs 1411 with the same diameter and one outer spring 1412 , and the guide rod 16 is provided with three. The inner springs 1411 are arranged in parallel, are respectively sleeved on the corresponding guide rods 16 , and are symmetrically distributed around the central extension line of the nail rod 13 .

Among them, 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.

Compared with the first set form, the inner springs 1411 of the second set form are respectively set on the corresponding guide rods 16, and the position is relatively fixed, which can greatly reduce the possibility of collision between springs, thereby avoiding the possibility of collision between springs. interference.

Example 2:

Wherein, the power supply spring of at least one layer of spring parts is a variable pitch spring.

Figure 7 is a schematic structural diagram of the first variable pitch spring of the present invention.

The variable pitch spring 142 is also called a variable pitch spring, that is, at different positions, the helix angle of the spring is different and the pitch t is also different.

The pitch-changing spring 142 has at least one pitch-changing section 1421, and the pitch t of the pitch-changing section 1421 gradually increases or decreases.

As shown in FIG. 7 , the pitch-changing spring 142 has two pitch-changing sections 1421 , and the two pitch-changing sections 1421 are both spirally formed by the same metal wire. The pitch t of one of the pitch-changing sections 1421 gradually decreases, and the pitch t of the other pitch-changing section 1421 gradually increases, so that the entire pitch-changing spring 142 has a small pitch in the middle and a large pitch at both ends.

In order to increase the nail driving power, the spring unit also has a plurality of variable pitch springs arranged in parallel, so The variable pitch springs have the same specifications and parameters, and are symmetrically distributed around the central extension line of the nail shooting rod. In order to better realize the deformation of the spring, the variable pitch spring is sleeved on the corresponding guide rod 16 .

When the spring unit has only one pitch-variable spring, the guide rod 16 may not be needed and the guide rod may be directly guided through the inner wall of the cylinder 11 to achieve the same effect.

Since the pitch of the variable-pitch spring itself is different, the vibration frequencies generated are also different. This causes different parts of the variable-pitch spring to produce different rebound forces after the compression and release work, resulting in different accelerations, which can cause them to The interiors offset each other, and the interior reduces the acceleration of the rebound, thereby offsetting part of the rebound force. This also reduces the impact force acting on the cylinder and achieves the vibration damping effect.

At the same time, due to the reduced acceleration of rebound, the vibration time of the spring unit is also reduced, ensuring the stability of the nail gun, reducing the user's labor intensity, and improving the nailing effect.

<Modification 2-1>

Wherein, the variable pitch spring has at least two equidistant sections with different pitches and a transition section connecting two adjacent equidistant sections, and the pitch of the same equidistant section is the same.

Figure 8 is a schematic structural diagram of the second variable pitch spring of the present invention.

The variable pitch spring also has at least one equidistant segment connected to the variable pitch segment, and the pitches of the equidistant segments are all the same.

As shown in Figure 8, the variable pitch spring 142 has a variable pitch section 1421 and an equal distance section 1422. The variable pitch section 1421 and the equal distance section 1422 are both spirally formed from the same metal wire. The pitch t of one of the variable-pitch sections 1421 gradually decreases, and the pitch t of the equal-spaced sections 1422 are all equal.

After the variable-pitch spring performs work after compression and release, due to its different pitch, the vibration frequencies generated are also different, which is beneficial to improving the nailing effect.

<Modification 2-2>

Figure 9 is a schematic structural diagram of the third variable pitch spring of the present invention.

As shown in Figure 9, the variable distance spring has a first equidistant section 1423, a second equidistant section 1424, and a transition section 1425 connecting the first equidistant section 1423 and the second equidistant section 1424. The first equidistant section 142, the second equidistant section 1424 and the transition section are all spirally formed from the same metal wire. The pitch of the first equidistant section 1423 is t1, and the pitch of the second equidistant section 1424 is t2. The pitch t1 of the first equidistant section 1423 is smaller than that of the second equidistant section 1424. Pitch t2.

When there are multiple first equidistant sections 1423 and second equidistant sections 1424 , the first equidistant sections 1423 and the second equidistant sections 1424 are spaced apart and connected through the transition section 1425 .

After the variable-pitch spring performs work after compression and release, due to its different pitch, the vibration frequencies generated are also different, which is beneficial to improving the nailing effect.

The above-mentioned embodiments are only preferred embodiments of the present invention and do not limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention shall be covered by the protection of the present invention. within the range.

Claims (10)

1. A combined power supply mechanism is installed in a nail gun and used to provide power for nail shooting. It is characterized by including:

   A cylinder, disposed in the nail gun, has a front side part and a rear side part;

   A rod seat is movably arranged in the cylinder body, dividing the cylinder body into a front side chamber and a rear side chamber;

   A nail shooting rod, fixedly combined with the rod base, has a nail shooting end extending out of the front side for nail shooting; and

   a spring unit freely mounted between said rod base and said rear side,

   Wherein, the spring unit has:

   At least two layers of spring parts are arranged along the movement direction of the rod base; and

   The linkage piece is disposed between two adjacent layers of spring portions and is used to allow the two layers of spring portions to interlock,

   Each layer of the spring portion includes at least one power supply spring,

   All the power supply springs in the spring portion of each layer are of the same type;

   The power supply springs in the spring portions of two adjacent layers are of different types.
2. A combined power supply mechanism according to claim 1, characterized in that:

   The power supply spring of the first type serves as the first type of spring,

   The power supply spring of the second type serves as the second type of spring,

   The first type of spring and the second type of spring are respectively composed of two different types of equal distance springs, variable distance springs, and nested springs.

   Wherein, the sleeved spring has at least one inner spring and an outer spring that sleeves the at least one inner spring inside.
3. A combined power supply mechanism according to claim 2, characterized in that:

   Wherein, the first type of spring and the second type of spring are respectively composed of two different types of cylindrical springs, conical springs, medium concave springs and medium convex springs.
4. A combined power supply mechanism according to claim 1, characterized in that:

   Wherein, at least one of the layer spring parts includes a plurality of the power supply springs arranged in parallel,

   The plurality of power supply springs are symmetrically distributed around the central extension line of the nail shooting rod.
5. A combined power supply mechanism according to claim 1, characterized in that:

   Wherein, the layer spring portion provided close to the front side portion serves as the front layer spring portion,

   The layer spring portion provided close to the rear side serves as a rear layer spring portion,

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

   The front spring part or the rear spring part has at least two power supply springs arranged side by side and symmetrically distributed around the central extension line of the nail rod.
6. A combined power supply mechanism according to claim 5, characterized in that:

   Wherein, the rod base contains a front buffer for buffering the vibration of the front spring part;

   The rear side portion contains a rear buffer member for buffering the vibration of the rear layer spring portion.
7. A combined power supply mechanism according to claim 1, characterized in that:

   Wherein, the cylinder body is provided with a plurality of centrally symmetrically arranged guide rods, and the two ends of each guide rod are respectively fixed to the front side part and the rear side part,

   The rod base is movably installed on a plurality of the guide rods;

   At least one of the layer spring parts includes the same number of power supply springs as the guide rods,

   Each power supply spring is installed on the corresponding guide rod.
8. A combined power supply mechanism according to claim 1, characterized in that:

   Wherein, the linkage piece has a plurality of mounting parts movably arranged on the guide rod and at least one guide rod part;

   One end of one of the layer spring parts is installed on the guide rod part, and the other end of one of the layer spring parts is installed on the rear side part of the cylinder or the rod seat.
9. A driving device installed in a nail gun and used to provide power for nail shooting, which is characterized by including:

   A combined power supply mechanism is used to provide power for nail shooting; and

   A driving unit used to drive the combined power supply mechanism to generate the power,

   Wherein, the combined power supply mechanism is the combined power supply mechanism described in any one of claims 1-8.
10. A nail gun is characterized by including:

    Driving device, used to provide power for nail shooting,

    Wherein, the driving device is the driving device according to claim 9.