Safety device of nailing device

Abstract

The utility model discloses a safety device of a nailing device, which relates to the technical field of nailing devices and comprises a safety seat, a self-limiting component, a locking component and an unlocking component. The safety seat comprises a nail tube connecting section and a limiting connecting section, and a lantern ring cover is fixed at the rear end of the limiting connecting section; the locking assembly is movably installed at the rear end of the limiting connecting section and has a locking state and an unlocking state, the nailing rod can be locked in the locking state, and locking of the nailing rod can be relieved in the unlocking state; the self-limiting assembly is installed on the safety base and used for limiting rotation of the locking assembly, and limitation of the locking assembly can be relieved when the nail pipe is pressed. The unlocking assembly is controlled to enable the locking assembly with the limitation removed to be switched between the locking state and the unlocking state. According to the safety device, a double-locking structure is adopted, locking can be released only when the nail pipe reaches the designated position and unlocking is controlled at the same time, the safety of the nailing device is improved, and the structural strength of the nailing rod is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nail drivers, in particular to a safety device for nail drivers. Background Art

[0002] Nailers are currently essential hand tools for carpentry and construction. Nailers drive nails directly into steel, concrete, brickwork or rock substrates, thereby firmly connecting components to be fixed (such as doors and windows, insulation boards, sound insulation layers, decorations, pipes, steel parts, wood products, etc.) to the substrate. Compared with other fastening methods, using nailers to fasten nails has the advantages of being fast, convenient and effective.

[0003] In view of the particularity that improper use of nailers may cause safety accidents, existing nailers are usually equipped with safety devices. For example, the patent document with publication number CN114750111A discloses a double-cylinder electric nailer, in which the nailer uses a limit release mechanism including an opening and closing limit part and a toggle assembly as a safety device to lock and limit the firing pin. However, this safety structure requires a toggle tooth to be set on the firing pin, which not only reduces the structural strength of the firing pin, but also makes it unsuitable for firing pins without tooth structures.

[0004] For this reason, it is necessary to propose new improvements to the existing safety devices. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned technical problems existing in the prior art, and to provide a nail driver safety device, which adopts a double locking structure and can release the lock only when the nail tube reaches the specified position and is unlocked at the same time. At the same time, there is no need to set a toggle tooth on the nail rod, which not only improves the safety of the nail driver, but also ensures the structural strength of the nail rod.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A nail driver safety device comprises a safety seat, a self-limiting component, a locking component and an unlocking component; wherein:

[0008] The safety seat comprises a nail-tube connecting section and a position-limiting connecting section fixed into one body, a pressable nail tube is installed at the front end of the nail-tube connecting section, and a collar cover for connecting with the nailing cylinder is fixed at the rear end of the position-limiting connecting section;

[0009] The safety seat has a nailing channel for the nailing rod to pass through, and the inner diameter of the nailing channel corresponding to the nail tube connecting section is larger than the inner diameter of the nailing channel corresponding to the limit connecting section;

[0010] The locking assembly is movably mounted at the rear end of the position-limiting connection section, and has a locking state and an unlocking state. The nailing rod can be locked in the locking state, and the nailing rod can be unlocked in the unlocking state.

[0011] The self-limiting assembly is installed on the safety seat to limit the rotation of the locking assembly, and can release the restriction of the locking assembly when pressing the nail tube;

[0012] The unlocking assembly is controlled to switch the locking assembly, which releases the restriction, between a locked state and an unlocked state.

[0013] The locking assembly comprises an axial ring, a locking pin and a needle roller, the axial ring being rotatably sleeved on the limiting connection section, the self-limiting assembly being able to limit the rotation of the locking assembly through the axial ring, and the unlocking assembly being controlled to enable the axial ring to rotate and control the state of the locking assembly; the inner surface of the axial ring is provided with symmetrical axial locking grooves, the locking pins are respectively movably arranged between the axial locking grooves through the through holes on the limiting connection section, the inner end of the locking pin is located in the nailing channel, the outer end of the locking pin is located outside the safety seat and is provided with a locking step and an unlocking step which cooperate with the axial locking groove, and the needle rollers are respectively arranged between the outer end of the locking pin and the axial locking groove; when the axial ring is controlled to rotate until the needle roller is located between the axial locking groove and the locking step, the locking assembly is in a locked state, the locking pin moves inward and reduces the inner end spacing to lock the nailing rod; when the axial ring is controlled to rotate until the needle roller is located between the axial locking groove and the unlocking step, the locking assembly is in an unlocked state, the locking pin can move outward and release the locking of the nailing rod.

[0014] The limiting connecting section is provided with an anti-rotation concave surface which is located in the same plane as the end surface of the outer end of the through hole. The outer diameter of the outer end of the locking pin is larger than the inner diameter of the through hole, and the inner side of the outer end of the locking pin is clearance-matched with the anti-rotation concave surface; the inner end of the locking pin is respectively provided with a locking inclined surface for clearance-matching with the inclined surface at the end of the nailing rod and a rotation-stopping inclined surface for clearance-matching with the axial side plane of the nailing rod.

[0015] The number of the locking pins and the number of the rolling needles are both two, and the locking pins and the rolling needles are symmetrically arranged.

[0016] The self-limiting component comprises a limit unlocking piece, an axial sliding groove, an axial limiting groove, a stroke hole, a pressure plate and a spring, the axial limiting groove is arranged on the inner surface of the axial ring, the axial sliding groove is arranged on the outer surface of the limiting connecting section and corresponds to the axial limit groove, the stroke hole is arranged at the rear end of the nail tube connecting section and is communicated with the axial sliding groove, the pressure plate is fixed to the rear end of the nail tube connecting section, and the limit unlocking piece is movably arranged in the axial sliding groove by the pressure plate; a lower controlled part is fixed at the front end of the limit unlocking piece, the lower controlled part extends into the nail tube connecting section through the stroke hole and is controlled by the nail tube, and an upper limit head is fixed at the rear end of the limit unlocking piece and extends into the axial limiting groove for limiting the rotation of the axial ring, and the spring abuts against the upper limit head through the sleeve ring cover; the lower controlled part can drive the upper limit head to move backward to the outside of the axial limiting groove when pressing the nail tube to release the restriction of the locking assembly, and the spring can automatically reset the upper limit head and restore the restriction on the locking assembly when the lower controlled part loses the pressing force.

[0017] The end surface of the collar cover is provided with an embedding hole, and the spring is installed on the safety seat through the embedding hole.

[0018] The unlocking assembly includes a control member, a steel rope, an arc-shaped slot, a positioning block and a return spring. The arc-shaped slot is arranged on the radial circumference of the axial ring. The collar covers at both ends of the arc-shaped slot are respectively provided with limiting notches. One end of the steel rope is arranged at the first limiting notch through the positioning block, and the other end is connected to the control member through the second limiting notch after bypassing the arc-shaped slot. The return spring is installed between the positioning block and the limiting notch. The control member can be controlled to rotate the axial ring and control the state of the locking assembly through the steel rope and the return spring.

[0019] An axial slot hole communicating with the nail driving channel is provided on the upper part of the nail tube connecting section, a block for blocking the nail driving rod is movably connected to the axial slot hole through a pin, and an avoidance notch for avoiding nail shooting is provided at the lower end of the block. The block is perpendicular to the nail tube connecting section in a natural state, and can be rotated to be parallel to the nail tube connecting section when the nail tube is pressed.

[0020] A return spring is fixed on the safety seat to keep the stopper and the nail tube connecting section vertical.

[0021] The nail tube is movably connected to the nail tube connecting section through an elastic connecting component, the elastic connecting component includes a pre-compression spring and a pin, the middle and rear parts of the nail tube are respectively provided with a ring platform and an axial limiting concave surface, the rear part of the nail tube is movably inserted in the nail tube connecting section, the pin is fixed at the front part of the nail tube connecting section and clamped in the axial limiting concave surface; the pre-compression spring is located between the ring platform and the nail tube connecting section.

[0022] By adopting the above technical solution, the beneficial technical effects of the utility model are:

[0023] 1. The safety device described in the utility model is mainly composed of a safety seat, a self-limiting component, a locking component and an unlocking component. Based on this specific structure,

[0024] First of all, the utility model can form a double locking structure for the nail rod by cooperating with the locking component and the self-limiting component. The nail rod can be unlocked only when the nail tube reaches the specified position and is unlocked by the unlocking component at the same time. Otherwise, the nail rod will remain in the locked state, which greatly ensures the safety of the nail driver during use.

[0025] Secondly, the utility model does not need to be provided with structures such as toggling teeth on the nail driving rod, and thus the structure of the nail driving rod can be simplified while ensuring the structural strength of the nail driving rod, and the utility model is more practical.

[0026] Finally, the utility model can release the double insurance locking by pressing the nail tube and releasing the unlocking component, and also has the advantage of easy operation.

[0027] 2. The utility model adopts a locking assembly with a specific structure. First, since the nail rod has a huge thrust when storing energy, the sliding friction between the parts in the entire device will be very large when locked, and it is difficult to unlock by manpower. The use of a roller needle can convert sliding friction into rolling friction, greatly reducing the force required for unlocking, so that the device can be easily unlocked by manpower and is more lightweight and convenient.

[0028] 3. The utility model adopts a self-limiting component with a specific structure, which has the advantages of effectively reducing the number of parts, reducing the difficulty of structural design, reducing transmission actions and improving limiting reliability.

[0029] 4. The utility model adopts an unlocking component with a specific structure, which can set the unlocking action of the axial ring to rotate around the axis. This action form can basically avoid accidental unlocking due to falling, collision, vibration, etc., which is conducive to greatly improving safety.

[0030] 5. The utility model provides a locking bevel and a rotation-stopping bevel at the inner end of the locking pin. Since the distance that the locking pin exits the through hole is limited, the locking bevel and the rotation-stopping bevel can always cooperate with the end bevel and the axial side plane clearance on the nailing rod, thereby preventing the nailing rod from rotating during use and affecting the locking effect. In addition, by cooperating with the anti-rotation concave surface and the outer end clearance of the locking pin, on the one hand, it can prevent the locking pin from entering the safety seat completely and causing the locking to fail, and on the other hand, it can prevent the locking pin from rotating in the through hole, so that the locking pin is always facing the piston rod.

[0031] 6. The utility model can form a third level of locking protection for the nail rod through a block with a specific structure, which can be a third level of protection to prevent the nail rod from being accidentally triggered. In addition, the block is also controlled to open by the nail tube, and no unlocking process is added, so it also does not affect the operation and nailing efficiency.

[0032] 7. The utility model connects the nail tube through an elastic connecting assembly, which is not only simple in structure but also conducive to the automatic resetting of the nail tube after the nailing device is nailed. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0034] Figure 2 It is a schematic diagram of the exploded structure of the utility model;

[0035] Figure 3 It is a left-side structural schematic diagram of the utility model;

[0036] Figure 4 This is a schematic diagram of the main structure of the insurance seat;

[0037] Figure 5 The schematic diagram of the structure of the insurance seat from a top view;

[0038] Figure 6 It is a schematic diagram of the left view of the safety seat;

[0039] Figure 7 It is a schematic diagram of the structure of the axial ring in the locking assembly;

[0040] Figure 8 It is a schematic diagram of the planar structure of the locking pin in the locking assembly;

[0041] Fig. 9 It is a schematic diagram of the three-dimensional structure of the locking pin in the locking assembly;

[0042] Fig.10 It is a schematic diagram of the structure when the locking assembly is in a locked state;

[0043] Fig.11 It is a schematic diagram of the structure when the locking assembly is in the unlocked state;

[0044] Fig.12 This is a schematic diagram of the planar structure of the utility model installed on a nailing machine;

[0045] Fig.13 for Fig.12 Schematic diagram of the decomposition structure.

[0046] The following are marked in the figure: 1. main cylinder, 2. auxiliary cylinder, 3. rear end cylinder cover, 4. nail pipe, 5. nailing rod, 6. main piston transmission device, 7. electric drive device, 8. safety device;

[0047] 4.1, ring table, 4.2, axial limit concave surface, 4.3, pre-compression spring, 4.4, pin shaft;

[0048] 8.1, safety seat, 8.2, self-limiting component, 8.3, locking component, 8.4, unlocking component, 8.5, collar cover, 8.6, nailing channel, 8.7, axial ring, 8.8, locking pin, 8.9, needle roller, 8.10, axial locking groove, 8.11, locking inclined surface, 8.12, locking step, 8.13, unlocking step, 8.14, limiting unlocking piece, 8.15, axial slide groove, 8.16, axial limiting groove, 8.17, travel hole, 8.18, pressure plate, 8.19, lower controlled part, 8.20, upper limit head, 8.21, embedded hole, 8.22, steel rope, 8.23, arc-shaped slot, 8.24, positioning block, 8.25, limiting notch, 8.26, axial slot hole, 8.27, stopper, 8.28, anti-rotation inclined surface. DETAILED DESCRIPTION

[0049] Example 1

[0050] This embodiment provides a nail driver safety device, which is mainly used in single / double cylinder nail drivers, for example, it can be used in the nail driver disclosed in the patent document with publication number CN117047708A. The safety device includes a safety seat 8.1, a self-limiting component 8.2, a locking component 8.3 and an unlocking component 8.4; wherein,

[0051] like Figure 1-6 As shown, the safety seat 8.1 is a cylindrical structure, which includes a nail tube connecting section and a limiting connecting section fixed into one. The front end of the nail tube connecting section is movably mounted with a pressable nail tube 4 through an elastic connecting assembly. When the nail tube 4 is pressed, the nail tube 4 can move toward the limiting connecting section. After the nail tube 4 is released, the nail tube 4 automatically resets under the action of the elastic connecting assembly. The rear end of the limiting connecting section is fixed with a collar cover 8.5. The collar cover 8.5 includes an end face perpendicular to the safety seat 8.1 and a collar parallel to the safety seat 8.1. The safety seat 8.1 can be connected to the cylinder of the nail driver through the collar cover 8.5. When the safety device is applied to a double-cylinder nail driver, the collar cover 8.5 is used to be fixed to the front end of the main cylinder 1.

[0052] In addition, the safety seat 8.1 has a nailing channel 8.6 for the nailing rod 5 to pass through, and the inner diameter of the nailing channel 8.6 corresponding to the nail tube connecting section is larger than the inner diameter of the nailing channel 8.6 corresponding to the limiting connecting section. In this embodiment, the inner diameter of the nail tube connecting section is set to be larger than the inner diameter of the limiting connecting section, which facilitates the subsequent control of the action of the self-limiting component 8.2 by the nail tube 4.

[0053] like Figure 1-3As shown, the locking assembly 8.3 is movably installed at the rear end of the limiting connection section, and the locking assembly 8.3 has a locking state and an unlocking state. In the locking state, the nailing rod 5 can be locked, and in the unlocking state, the nailing rod 5 can be unlocked. It should be noted that (a limiting structure is provided on the safety seat 8.1 and / or the axial ring 8.7, and the limiting structure enables the locking assembly 8.3 to only rotate radially at a certain angle, but not to move axially), and the locking and unlocking of the nailing rod 5 can be achieved by controlling the rotation of the locking assembly 8.3.

[0054] like Figure 1-3 As shown, the self-limiting assembly 8.2 is installed on the safety seat 8.1 and is controlled by the nail tube 4. Its function is to limit the rotation of the locking assembly 8.3 to improve the safety of the nail driver. Specifically, on the one hand, it can automatically limit the rotation of the locking assembly 8.3 in the locked state, so that the locking assembly 8.3 cannot be unlocked, thereby improving the safety effect of the safety device; on the other hand, it can release the restriction of the locking assembly 8.3 when the nail tube 4 is pressed to the set position, so that the locking assembly 8.3 can be unlocked.

[0055] like Figure 1-3 As shown, the unlocking assembly 8.4 is connected to the locking assembly 8.3, and the unlocking assembly 8.4 is controlled to switch the unlocked locking assembly 8.3 between the locked state and the unlocked state. That is, when the restriction of the locking assembly 8.3 is released by pressing the nail tube 4, the locking assembly 8.3 is controlled to rotate by the unlocking assembly 8.4, that is, the locking assembly 8.3 can be switched from the locked state to the unlocked state, or from the unlocked state to the locked state, thereby realizing the smooth nailing of the nailing device.

[0056] According to the preferred implementation of this embodiment, Figure 1-3 As shown in Figures 7-9, the locking assembly 8.3 includes an axial ring 8.7, a locking pin 8.8 and a roller needle 8.9. The axial ring 8.7 is rotatably mounted on the limiting connecting section. The self-limiting assembly 8.2 can limit the rotation of the locking assembly 8.3 through the axial ring 8.7. The unlocking assembly 8.4 can be controlled to rotate the axial ring 8.7 and control the state of the locking assembly 8.3 (control the locking assembly 8.3 to switch to a locked state or an unlocked state).

[0057] by Figure 7Taking the direction shown as an example, two symmetrical axial locking grooves 8.10 are provided on both sides of the inner surface of the axial ring 8.7, through holes are respectively opened on both sides of the limiting connection section near the collar cover 8.5, and the locking pin 8.8 is movably arranged between the axial locking grooves 8.10 through the through holes, the inner end of the locking pin 8.8 is located in the nailing channel 8.6, the outer end of the locking pin 8.8 is located outside the safety seat 8.1, and the needle roller 8.9 is respectively arranged between the outer end of the locking pin 8.8 and the axial locking groove 8.10. The outer end of the locking pin 8.8 has an inclined surface, and the inclined surface is respectively provided with a locking step 8.12 and an unlocking step 8.13 that cooperate with the axial locking groove 8.10, and the locking step 8.12 and the unlocking step 8.13 both have a certain degree of concavity to facilitate the limiting needle roller 8.9.

[0058] Furthermore, the spacing between the locking step 8.12 and the axial locking groove 8.10 is smaller than the spacing between the unlocking step 8.13 and the axial locking groove 8.10. When the needle roller 8.9 is located between the axial locking groove 8.10 and the locking step 8.12, the locking pin 8.8 is supported by the needle roller 8.9 and cannot move; when the needle roller 8.9 is located between the axial locking groove 8.10 and the unlocking step 8.13, the locking pin 8.8 can move outward to release the lock.

[0059] Furthermore, Fig.10 , 11 As shown, when the axial ring 8.7 is controlled to rotate until the roller needle 8.9 is located between the axial locking groove 8.10 and the locking step 8.12, the locking assembly 8.3 is in a locked state, at which time the locking pin 8.8 moves inwards and reduces the inner end spacing to lock the nailing rod 5; when the axial ring 8.7 is controlled to rotate until the roller needle 8.9 is located between the axial locking groove 8.10 and the unlocking step 8.13, the locking assembly 8.3 is in an unlocked state, at which time the locking pin 8.8 can move outwards and release the locking of the nailing rod 5. When in use, the nailing rod 5 will increase the inner end spacing of the locking pin 8.8 under the action of the nailing pressure to achieve nailing.

[0060] Furthermore, Figure 8 , 9 As shown, the limit connection section is provided with an anti-rotation concave surface located in the same plane as the outer end surface of the through hole, the outer diameter of the outer end of the locking pin 8.8 is larger than the inner diameter of the through hole, and the inner side of the outer end of the locking pin 8.8 is located in the anti-rotation concave surface and has a clearance fit with the anti-rotation concave surface. Since the inner side of the outer end of the locking pin 8.8 is located in the anti-rotation concave surface, the clearance fit structure between the anti-rotation concave surface and the anti-rotation concave surface can prevent the locking pin 8.8 from rotating, thereby ensuring a more accurate and stable locking effect.

[0061] In addition, if Figure 8 , 9As shown, in order to effectively lock the nail rod 5 and prevent it from rotating, the locking bevel 8.11 and the anti-rotation bevel 8.28 are respectively provided on the inner end surface of the locking pin 8.8 in this embodiment. The locking bevel 8.11 and the anti-rotation bevel 8.28 are used to cooperate with the preset end bevel and axial side plane on the nail rod 5 respectively. Specifically, the anti-rotation bevel 8.28 always cooperates with the preset axial side plane on the nail rod 5 to prevent the nail rod 5 from rotating. When the nail rod 5 is locked by the locking pin 8.8, the end bevel on the nail rod 5 just presses on the locking bevel 8.11, thereby achieving effective locking and unlocking of the nail rod 5. Since the distance that the locking pin 8.8 exits the through hole is limited, the locking bevel 8.11 and the anti-rotation bevel 8.28 can always cooperate with the end bevel and axial side plane on the nail rod 5 to prevent the nail rod 5 from rotating during use and ensure a better locking effect.

[0062] Since the locking pin 8.8 of the present embodiment adopts a specific structure to cooperate with the rotatable axial ring 8.7, the locking pin 8.8 can be moved by the rotation of the axial ring 8.7 to achieve the purpose of unlocking. It does not require too much force to achieve automatic limiting of the nail rod 5 and automatic release of the axial ring 8.7.

[0063] In addition, in this embodiment, a limiting structure is provided on the safety seat 8.1 and / or the axial ring 8.7, and the limiting structure has the function of enabling the axial ring 8.7 to rotate radially only to a certain angle but not to move axially.

[0064] According to the preferred implementation of this embodiment, the number of locking pins 8.8 and the number of needle rollers 8.9 are both two, and the locking pins 8.8 and the needle rollers 8.9 are symmetrically arranged. However, as required, the number of locking pins 8.8 and the number of needle rollers 8.9 can also be set to three or more.

[0065] According to the preferred implementation of this embodiment, Figure 1-2As shown, the self-limiting assembly 8.2 includes a limit unlocking piece 8.14, an axial slide 8.15, an axial limit groove 8.16, a stroke hole 8.17, a pressure plate 8.18 and a spring (not shown in the figure). Among them, the axial limit groove 8.16 is provided on the upper inner surface of the axial ring 8.7, and the axial slide 8.15 is provided on the outer surface of the limit connection section and corresponds to the axial limit groove 8.16, and is specifically located directly below the axial limit groove 8.16. The stroke hole 8.17 is provided at the rear end of the nail tube connection section and communicates with the axial slide 8.15. The pressure plate 8.18 is fixed to the rear end of the nail tube connection section by screws, and the limit unlocking piece 8.14 is movably arranged in the axial slide 8.15 through the pressure plate 8.18. Under the action of the pressure plate 8.18, the limit unlocking piece 8.14 can only slide forward and backward along the axial slide 8.15. In addition, the front end of the limit unlocking piece 8.14 is fixed with a lower controlled part 8.19 extending vertically downward, and the lower controlled part 8.19 extends into the nail tube connecting section through the travel hole 8.17 and is controlled by the nail tube 4. The depth of the lower controlled part 8.19 is preferably controlled by the nail tube 4 but does not affect the nailing tube 4. When the nail tube 4 is pressed to a suitable position, the nail tube 4 will drive the lower controlled part 8.19 to move backward. The rear end of the limit unlocking piece 8.14 is fixed with an upper limit head 8.20 extending vertically upward, and the upper limit head 8.20 extends into the axial limit groove 8.16 to limit the rotation of the axial ring 8.7. The spring abuts against the upper limit head 8.20 through the collar cover 8.5 to keep the upper limit in the axial limit groove 8.16.

[0066] Specifically, when pressing the nail tube 4, the lower controlled part 8.19 can drive the upper limit head 8.20 to move backward to the outside of the axial limit groove 8.16 and release the restriction of the locking assembly 8.3, so that the locking assembly 8.3 can rotate. After releasing the nail tube 4, the lower controlled part 8.19 loses the pressing force, and the upper limit head 8.20 will automatically return to the axial limit groove 8.16 under the action of the spring and resume the restriction on the locking assembly 8.3.

[0067] It should be noted that the upper limit head 8.20 is arranged at the rear end of the axial ring 8.7 to prevent the axial ring 8.7 from automatically rotating during nailing, thereby causing a safety incident of failure of the limit of the nailing rod 5. Only when the nail tube 4 is manually compressed and reaches the specified position under the action of the pre-compression spring 4.3, so that the upper limit head 8.20 is disengaged from the axial locking groove 8.10, the locking assembly 8.3 can be unlocked.

[0068] According to the preferred implementation of this embodiment, there is a certain distance between the axial ring 8.7 and the end surface of the collar cover 8.5, and the distance allows the upper limit head 8.20 to extend out of the axial limit groove 8.16. In addition, the end surface of the collar cover 8.5 is provided with an embedded hole 8.21, and the spring can be installed on the safety seat 8.1 through the embedded hole 8.21.

[0069] According to the preferred implementation of this embodiment, Figure 1-3 As shown, the unlocking assembly 8.4 includes a control member (not shown in the figure), a steel rope 8.22, an arc-shaped slot 8.23, a positioning block 8.24 and a return spring (not shown in the figure). The control member can be installed on the housing of the nail driver, the arc-shaped slot 8.23 ​​is arranged on the radial circumference of the axial ring 8.7, and the collar covers 8.5 at both ends of the arc-shaped slot 8.23 ​​are respectively provided with limiting notches 8.25. One end of the steel rope 8.22 is arranged at the first limiting notch 8.25 through the positioning block 8.24, and the other end is connected to the control member through the second limiting notch 8.25 after bypassing the arc-shaped slot 8.23. The return spring is installed between the positioning block 8.24 and the limiting notch 8.25. The control member can be controlled to rotate the axial ring 8.7 and control the state of the locking assembly 8.3 through the steel rope 8.22 and the return spring.

[0070] It should be noted that the control member is a conventional structure. For example, it may include a retractable trigger and related structural members such as a pulley, and the retractable trigger may be composed of conventional structures such as a guide rod, a spring, and a trigger body. In actual use, when the locking assembly 8.3 is released from restriction, the trigger body is pulled, and the trigger body can drive the axial ring 8.7 to rotate through the steel rope 8.22, thereby switching the locking assembly 8.3 to the unlocked state. After the trigger body is released, the axial ring 8.7 will automatically reset under the action of the reset spring and switch the locking assembly 8.3 to the locked state.

[0071] According to the preferred implementation of this embodiment, Figure 1-3 As shown, the elastic connection assembly includes a pre-compression spring 4.3 and a pin 4.4. The middle and rear parts of the nail tube 4 are provided with a ring platform 4.1 and an axial limit concave surface 4.2 respectively. The rear part of the nail tube 4 is movably inserted in the nail tube connection section. The pin 4.4 is fixed at the front part of the nail tube connection section and is clamped in the axial limit concave surface 4.2. The pre-compression spring 4.3 is located between the ring platform 4.1 and the nail tube connection section. In actual use, by pressing the nail tube 4 to move backward along the nailing channel 8.6, the self-limiting assembly 8.2 can be controlled to release the restriction of the locking assembly 8.3. After nailing is completed, the nail tube 4 is released, and the nail tube 4 can be automatically reset under the action of the pre-compression spring 4.3 to facilitate the next nailing.

[0072] Figure 12-13The schematic diagram of the structure in which the safety device 8 is installed on a nailing machine is shown. As can be seen from the attached figure, the nailing machine includes a main cylinder 1 and a sub-cylinder 2 fixed up and down, a nail tube 4 is installed at the front end of the main cylinder 1 through the safety device 8, a nail box is connected to the lower part of the safety seat 8.1 of the safety device 8, and the nails in the nail box can automatically enter the nailing channel 8.6. The main cylinder 1 and the sub-cylinder 2 are connected through the rear end cylinder cover 3. The main cylinder 1 is provided with a main piston, and the sub-cylinder 2 is provided with a sub-piston. One end of the nailing rod 5 is fixed on the main piston, and the other end extends into the nail tube 4 through the safety device 8. The front end of the sub-cylinder 2 is fixed with an electric drive device 7, which mainly includes a motor and a screw structure connected to the sub-piston, and its function is to control the reciprocating motion of the sub-piston. The main piston transmission device 6 mainly includes a transmission pulley, and is connected between the main piston and the sub-piston through the rear end cylinder cover 3.

[0073] The working principle of this embodiment is:

[0074] 1. The electric drive device 7 controls the auxiliary piston to move from back to front ( Fig.12 The auxiliary piston will drive the main piston and nail rod 5 to move from front to back through the main piston transmission device 6 ( Fig.12 When the main piston moves to the rear end of the main cylinder 1, the nail driving rod 5 is located at the rear side (right side) of the locking pin 8.8. At this time, due to the special structure of the safety device 8 and the tight contact structure of the roller needle 8.9 against the locking pin 8.8, the inner end spacing of the locking pin 8.8 is reduced and the nail driving rod 5 is locked.

[0075] 2. The electric drive device 7 controls the auxiliary piston to move from front to back ( Fig.12 The air in the auxiliary cylinder 2 is compressed to become high-pressure gas, completing the compression energy storage process of the nail driver.

[0076] 3. Place the nail tube 4 against the object to be operated, press the nail tube 4, and when the nail tube 4 moves backward to a suitable position, it will push the upper limit head 8.20 of the limit unlocking piece 8.14 to move backward and disengage from the axial limit groove 8.16, thereby releasing the limit function of the locking assembly 8.3. At this time, the control member pulls the steel rope 8.22, and the axial ring 8.7 will drive the roller needle 8.9 to rotate counterclockwise, and the locking pin 8.8 will lose the support of the roller needle 8.9 and move outward. The nail rod 5 will push the locking pin 8.8 under the drive of the high-pressure gas, and then push the nail into the base to complete the nailing process. Then release the nail tube 4, and the safety device 8 will automatically reset to facilitate the next nailing.

[0077] Example 2

[0078] In order to further improve the safety of the safety device, this embodiment adds a third safety structure based on the embodiment 1. Figure 1-2As shown, an axial slot 8.26 communicating with the nailing channel 8.6 is provided in the middle of the upper part of the nail tube connecting section, and a stopper 8.27 for blocking the nailing rod 5 is provided in the axial slot 8.26. The upper end of the stopper 8.27 is movably connected in the axial slot 8.26 by a pin, and the lower end of the stopper 8.27 can rotate around the pin and can be perpendicular to the nail tube connecting section in a natural state, thereby playing a role in blocking the nailing rod 5. The stopper 8.27 is also controlled by the nail tube 4. When the nail tube 4 is pressed to move backward, the nail tube 4 can push the stopper 8.27 to rotate to be parallel to the nail tube connecting section, thereby releasing the blocking of the nailing rod 5.

[0079] According to the preferred implementation of this embodiment, in order to make the stopper 8.27 continuously play a blocking role, a return spring (not shown in the figure) is fixed on the safety seat 8.1 to keep the stopper 8.27 and the nail tube connecting section perpendicular. Preferably, one end of the return spring can be fixed to the front end of the pressure plate 8.18, and the other end can be fixed to the upper end of the stopper 8.27. Under the action of the return spring, no matter how the nail driver is placed, the stopper 8.27 will continue to be perpendicular to the nail tube connecting section, thereby playing a continuous safety role.

[0080] According to a preferred implementation of this embodiment, a clearance notch for evading nails is provided at the lower end of the stopper 8.27. The clearance notch may be V-shaped or U-shaped, so as to prevent the nails from affecting the stopper 8.27 from rotating smoothly.

[0081] In actual use, the block 8.27 can play a dual role of protection when the locking assembly 8.3 fails to lock and limit the nail driving rod 5 in time and when the nail driving rod 5 is accidentally triggered.

[0082] The above description is only a specific implementation method of the present utility model. Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes; all disclosed features, or all methods or steps in the process, except for mutually exclusive features and / or steps, can be combined in any way.

Claims

1. A nail driver safety device, Features: It comprises a safety seat (8.1), a self-limiting component (8.2), a locking component (8.3) and an unlocking component (8.4); wherein: The safety seat (8.1) comprises a nail tube connecting section and a position limiting connecting section fixed together, the front end of the nail tube connecting section is provided with a pressable nail tube (4), and the rear end of the position limiting connecting section is provided with a collar cover (8.5) for connecting to a nail driving cylinder; The safety seat (8.1) has a nailing channel (8.6) for the nailing rod (5) to pass through, and the inner diameter of the nailing channel (8.6) corresponding to the nail tube connecting section is larger than the inner diameter of the nailing channel (8.6) corresponding to the limit connecting section; The locking assembly (8.3) is movably mounted at the rear end of the limiting connection section, and the locking assembly (8.3) has a locked state and an unlocked state. In the locked state, the nail driving rod (5) can be locked, and in the unlocked state, the nail driving rod (5) can be unlocked. The self-limiting component (8.2) is installed on the safety seat (8.1) to limit the rotation of the locking component (8.3), and can release the restriction of the locking component (8.3) when the nail tube (4) is pressed; The unlocking component (8.4) is controlled to enable the locking component (8.3) that releases the restriction to switch between a locked state and an unlocked state.

2. A nail driver safety device according to claim 1, Features: The locking assembly (8.3) comprises an axial ring (8.7), a locking pin (8.8) and a needle roller (8.9); the axial ring (8.7) is rotatably sleeved on the limiting connection section; the self-limiting assembly (8.2) can limit the rotation of the locking assembly (8.3) through the axial ring (8.7); the unlocking assembly (8.4) can be controlled to rotate the axial ring (8.7) and control the state of the locking assembly (8.3); the inner surface of the axial ring (8.7) is provided with symmetrical axial locking grooves (8.10); the locking pins (8.8) are movably arranged between the axial locking grooves (8.10) through the through holes on the limiting connection section; the inner end of the locking pin (8.8) is located in the nailing channel (8.6); the outer end of the locking pin (8.8) is located outside the safety seat (8.1) and is provided with a locking member connected to the axial locking groove (8.10); The locking step (8.12) and the unlocking step (8.13) matched with the tightening groove (8.10) and the needle roller (8.9) are respectively arranged between the outer end of the locking pin (8.8) and the axial locking groove (8.10); when the axial ring (8.7) is controlled to rotate until the needle roller (8.9) is located between the axial locking groove (8.10) and the locking step (8.12), the locking assembly (8.3) is in a locked state, and the locking pin (8.8) moves inwardly and reduces the inner end spacing to lock the nail driving rod (5); when the axial ring (8.7) is controlled to rotate until the needle roller (8.9) is located between the axial locking groove (8.10) and the unlocking step (8.13), the locking assembly (8.3) is in an unlocked state, and the locking pin (8.8) can move outwardly and release the locking of the nail driving rod (5).

3. A nail driver safety device according to claim 2, Features: The limit connection section is provided with an anti-rotation concave surface located in the same plane as the outer end surface of the through hole, the outer diameter of the outer end of the locking pin (8.8) is larger than the inner diameter of the through hole, and the inner side of the outer end of the locking pin (8.8) is clearance-matched with the anti-rotation concave surface; the inner end of the locking pin (8.8) is respectively provided with a locking inclined surface (8.11) for clearance-matching with the inclined surface of the end of the nailing rod (5) and a rotation-stopping inclined surface (8.28) for clearance-matching with the axial side plane of the nailing rod (5).

4. A nail driver safety device according to claim 2 or 3, Features: The number of the locking pins (8.8) and the number of the rolling needles (8.9) are both two, and the locking pins (8.8) and the rolling needles (8.9) are symmetrically arranged.

5. A nail driver safety device according to claim 2, Features: The self-limiting component (8.2) comprises a limiting unlocking piece (8.14), an axial sliding groove (8.15), an axial limiting groove (8.16), a travel hole (8.17), a pressure plate (8.18) and a spring, wherein the axial limiting groove (8.16) is provided on the inner surface of the axial ring (8.7), the axial sliding groove (8.15) is provided on the outer surface of the limiting connecting section and corresponds to the axial limiting groove (8.16), the travel hole (8.17) is provided at the rear end of the nail tube connecting section and communicates with the axial sliding groove (8.15), the pressure plate (8.18) is fixed at the rear end of the nail tube connecting section, and the limiting unlocking piece (8.14) is movably arranged in the axial sliding groove (8.15) through the pressure plate (8.18); A lower controlled portion (8.19) is fixed to the front end of the limit unlocking piece (8.14), and the lower controlled portion (8.19) extends into the nail tube connecting section through the travel hole (8.17) and is controlled by the nail tube (4). An upper limit head (8.20) is fixed to the rear end of the limit unlocking piece (8.14) and extends into the axial limit groove (8.16) for limiting the rotation of the axial ring (8.7), and a spring abuts against the upper limit head (8.20) through a collar cover (8.5); the lower controlled portion (8.19) can drive the upper limit head (8.20) to move backward to the outside of the axial limit groove (8.16) when pressing the nail tube (4) to release the restriction of the locking assembly (8.3), and the spring can automatically reset the upper limit head (8.20) and restore the restriction on the locking assembly (8.3) when the lower controlled portion (8.19) loses the pressing force.

6. A nail driver safety device according to claim 5, Features: An embedding hole (8.21) is provided on the end surface of the collar cover (8.5), and the spring is installed on the safety seat (8.1) through the embedding hole (8.21).

7. A nail driver safety device according to claim 2, Features: The unlocking assembly (8.4) comprises a control member, a steel rope (8.22), an arc-shaped slot (8.23), a positioning block (8.24) and a return spring. The arc-shaped slot (8.23) is arranged on the radial circumference of the axial ring (8.7). The collar covers (8.5) at both ends of the arc-shaped slot (8.23) are respectively provided with limit notches (8.25). One end of the steel rope (8.22) is arranged at a first limit notch (8.25) through the positioning block (8.24), and the other end is connected to the control member through a second limit notch (8.25) after bypassing the arc-shaped slot (8.23). The return spring is installed between the positioning block (8.24) and the limit notch (8.25). The control member can be controlled to rotate the axial ring (8.7) and control the state of the locking assembly (8.3) through the steel rope (8.22) and the return spring.

8. A nail driver safety device according to any one of claims 1-3 and 5-7, Features: An axial slot (8.26) communicating with the nail driving channel (8.6) is formed at the upper portion of the nail tube connecting section. A stopper (8.27) for blocking the nail driving rod (5) is movably connected in the axial slot (8.26) via a pin. A relief notch for avoiding nail driving is formed at the lower end of the stopper (8.27). The stopper (8.27) is perpendicular to the nail tube connecting section in a natural state and can rotate to be parallel to the nail tube connecting section when the nail tube (4) is pressed.

9. A nail driver safety device according to claim 8, Features: A return spring is fixed on the safety seat (8.1) to keep the stopper (8.27) and the nail-tube connecting section perpendicular.

10. A nail driver safety device according to claim 1, Features: The nail tube (4) is movably connected to the nail tube connecting section via an elastic connecting component, the elastic connecting component comprising a pre-compression spring (4.3) and a pin (4.4), the middle and rear portions of the nail tube (4) are respectively provided with an annular platform (4.1) and an axial limiting concave surface (4.2), the rear portion of the nail tube (4) is movably inserted into the nail tube connecting section, the pin (4.4) is fixed to the front portion of the nail tube connecting section and is clamped in the axial limiting concave surface (4.2); the pre-compression spring (4.3) is located between the annular platform (4.1) and the nail tube connecting section.

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