Dustproof structure and nail gun

Abstract

The utility model provides a dustproof structure and a nail gun. The dustproof structure comprises a firing pin, a nail cover and a sealing piece, and the firing pin is provided with a first end and a second end; the nail cover is provided with a through hole for the first end to pass through; and the sealing piece is arranged on the firing pin in a sleeving mode and abuts against the side, away from the second end, of the nail cover, an annular sealing lip is arranged on the surface, away from the second end, of the sealing piece in a protruding mode, and the annular sealing lip is gradually inclined towards the firing pin in the direction from the second end to the first end. According to the dustproof structure, the sealing piece is arranged between the first end of the firing pin and the penetrating hole of the pin cover, the annular sealing lip of the sealing piece is inclined, when the firing pin moves in the direction from the first end to the second end, air rapidly flows through the gap between the annular sealing lip and the firing pin, and the pressure difference is formed between the two ends of the annular sealing lip; at the moment, the annular sealing lip can be pressed to the peripheral side face of the first end of the firing pin under the action of the pressure intensity difference, so that the sealing effect is achieved, and foreign matter such as chippings or broken nails is prevented from entering the nail gun.

Description

TECHNICAL FIELD

[0001] The utility model embodiment relates to electric tool technical field, especially relates to a dustproof structure and nail gun. BACKGROUND

[0002] Nail gun because work will cause impact to wall body or board etc, thereby produce a large amount of debris or broken nail and various foreign matters, if foreign matter enters the inside of nail gun, not only can exacerbate the wear and tear between the moving components of nail gun inside, influence the service life of nail gun, and still can increase the risk of nail gun work jam. CONTENT

[0003] The utility model embodiment is to provide a dustproof structure and nail gun, aims at avoiding the problem that foreign matter enters the inside of nail gun and causes internal parts wear and tear and jam.

[0004] To solve the above technical problem, the utility model embodiment provides a dustproof structure, comprising:

[0005] The plunger has a first end and a second end opposite in the extension direction of the plunger;

[0006] The nail cover is provided with a through hole for the first end to pass through, and the plunger is movably arranged relative to the nail cover along the extension direction of the plunger;

[0007] The sealing element is sleeved on the plunger, abuts against one side of the nail cover away from the second end, and has an annular sealing lip protruding from the surface away from the second end, which is gradually inclined towards the plunger in the direction from the second end to the first end;

[0008] Wherein, when the plunger is static, the annular sealing lip and the plunger are gap-fitted; when the plunger moves along the direction from the first end to the second end, the annular sealing lip is attached to the peripheral side surface of the plunger.

[0009] Preferably, the surface of the nail cover away from the second end is provided with a mounting groove, the through hole is arranged on the groove bottom wall of the mounting groove, and the sealing element is arranged in the mounting groove and abuts against the groove bottom wall of the mounting groove.

[0010] Preferably, the sealing element comprises a sealing element main body sleeved on the plunger, and the annular sealing lip is arranged on the sealing element main body, and the sealing element main body and the plunger are gap-fitted.

[0011] Preferably, the dustproof structure further comprises a pressing element arranged in the mounting groove, and the pressing element abuts against one side of the sealing element away from the second end.

[0012] Preferably, the pressing member is annularly arranged and sleeved on the striker.

[0013] Preferably, the pressing member is movably arranged in the mounting groove along the extending direction of the striker.

[0014] Preferably, the outer circumferential surface of the pressing member is provided with external threads, and the inner groove sidewall of the mounting groove is provided with internal threads threadedly matched with the external threads.

[0015] Preferably, the pressing member is provided with a notch on the surface away from the second end, so as to rotate and adjust the pressing member along the extending direction of the striker through the notch.

[0016] Preferably, the inner diameter of the pressing member is greater than the outer diameter of one end of the annular sealing lip close to the second end.

[0017] To achieve the above object, the utility model also provides a nail gun, which comprises:

[0018] The dustproof structure is the dustproof structure mentioned above.

[0019] The driver is power-coupled with the second end of the striker in the dustproof structure, so as to drive the striker to move along the extending direction of the striker relative to the nail cover in the dustproof structure through the driver.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The dustproof structure of the utility model is provided with a sealing member between the first end of the striker and the perforation of the nail cover, the annular sealing lip of the sealing member is of an inclined shape, the inner diameter of the annular sealing lip is greater than the diameter of the first end of the striker, when the striker moves along the direction from the first end to the second end, air quickly flows through the gap between the annular sealing lip and the striker, the two ends of the annular sealing lip form a pressure difference, at this time, the annular sealing lip will be pressed to the circumferential surface of the first end of the striker under the action of the pressure difference, so as to realize the sealing effect, thereby preventing foreign matters such as chippings or broken nails from entering the inside of the nail gun. BRIEF DESCRIPTION OF DRAWINGS

[0022] One or more embodiments are exemplarily illustrated by pictures in the drawings corresponding thereto, which do not constitute limitation on the embodiments, and elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified, and the drawings do not constitute proportional limitation.

[0023] Figure 1 It is a structural schematic view of the dustproof structure in the utility model embodiment.

[0024] Figure 2 For Figure 1 Structure diagram of the nail gun in the middle of the plunger moving;

[0025] Figure 3 For Figure 1 Local enlarged view of A in the middle;

[0026] Figure 4 For Figure 1 Structure diagram of the sealing element and the pressing element in the middle;

[0027] Figure 5 Structure diagram of the nail gun in the embodiment of the utility model.

[0028] The utility model drawing label explanation:

[0029] Nail gun 1000, dustproof structure 100, plunger 1, first end 11, second end 12, rack portion 13, nail cover 2, perforation 21, installation groove 22, sealing element 3, annular sealing lip 31, sealing element main body 32, pressing element 4, outer thread 41, notch 42, piston 5, driver 200, motor 200a, driving wheel 300, cavity 400, gun nozzle 500, nail magazine 600.

[0030] The utility model aims at realizing, function characteristics and advantages will combine embodiment, with reference to the further description of attached drawing. Specific implementation

[0031] The technical scheme in the embodiment of the utility model will be described clearly and completely in combination with the drawings in the embodiment of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0032] It should be noted that if the embodiment of the utility model relates to directional indication (such as up, down, left, right, front, back …), the directional indication is only used to explain the relative position relationship, movement condition etc. between components in a certain specific posture (as shown in the drawing), if the specific posture changes, the directional indication also changes accordingly.

[0033] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0034] The dustproof structure can be used in a nail gun such as a lithium battery nail gun, Figures 1 to 4 A preferred embodiment of the dustproof structure provided by the present application is shown, Figure 5 A preferred embodiment of the nail gun provided by the present application is shown.

[0035] Please refer to Figures 1 to 4 In the embodiment, the dustproof structure 100 includes a striker 1, a nail cover 2 and a sealing element 3.

[0036] Please refer to Figure 1 And Figure 2 The striker 1 has a first end 11 and a second end 12 opposite in the extension direction of the striker 1.

[0037] Specifically, the first end 11 or the second end 12 is used to fire a fastener, and the first end 11 will be used to fire a fastener as an example in the following, and the extension direction of the striker 1 is defined as front and back, the first end 11 is the front end of the striker 1, and the second end 12 is the rear end of the striker 1, so that the striker 1 can fire the fastener from the rear side to the front through the first end 11.

[0038] Please refer to Figures 1 to 3 The nail cover 2 is provided with a through hole 21 for the first end 11 to pass through, and the striker 1 is arranged to be movable relative to the nail cover 2 along the extension direction of the striker 1.

[0039] Specifically, the through hole 21 penetrates the nail cover 2 front and back, so that the first end 11 of the striker 1 can pass through the nail cover 2 from the rear to the front at the through hole 21, and the striker 1 is arranged to be movable front and back relative to the nail cover 2. The rear end of the through hole 21 communicates with the inside of the nail gun 1000, and optionally, please refer to Figure 1 、 Figure 2 And Figure 5 In the embodiment, the inside of the nail gun 1000 is provided with a cavity 400, the cavity 400 is provided with a piston 5 capable of sliding front and back, and the second end 12 of the striker 1 is located inside the nail gun 1000 and connected to the piston 5, so that the piston 5 slides front and back when the striker 1 moves.

[0040] Referring to Figures 1 to 3 , the sealing member 3 is sleeved on the striker 1, the sealing member 3 abuts against one side of the nail cover 2 away from the second end 12, and an annular sealing lip 31 is protruded on the surface of the sealing member 3 away from the second end 12, and the annular sealing lip 31 is gradually inclined towards the striker 1 in the direction from the second end 12 to the first end 11; wherein, when the striker 1 is static, the annular sealing lip 31 and the striker 1 are gap-fitted; when the striker 1 moves in the direction from the first end 11 to the second end 12, the annular sealing lip 31 is attached to the peripheral side surface of the striker 1.

[0041] Specifically, the sealing member 3 is sleeved on the first end 11 of the striker 1, the sealing member 3 abuts against the front side of the nail cover 2, and an annular sealing lip 31 is protruded on the front surface of the sealing member 3, the annular sealing lip 31 is arranged along the circumferential direction of the striker 1, the annular sealing lip 31 is arranged around the first end 11 of the striker 1, and the outer diameter of the annular sealing lip 31 gradually decreases from back to front, so that the annular sealing lip 31 is gradually inclined towards the striker 1 from back to front.

[0042] The annular sealing lip 31 and the first end 11 of the striker 1 are gap-fitted, that is, the inner diameter of the smallest part of the annular sealing lip 31 (i.e. the front end of the annular sealing lip 31) is slightly larger than the diameter of the first end 11 of the striker 1, so that a gap is formed between the annular sealing lip 31 and the first end 11 of the striker 1, which can reduce the frictional resistance between the striker 1 and the sealing member 3. During the backward movement of the striker 1, a negative pressure is formed near the striker 1 of the annular sealing lip 31, that is, a negative pressure is formed at the rear end of the annular sealing lip (the negative pressure is smaller than the atmospheric pressure at the front end of the annular sealing lip 31), at this time, the annular sealing lip 31 will be pressed towards the peripheral side surface of the first end 11 of the striker 1 under the action of the pressure difference, so as to achieve the sealing effect, thereby preventing foreign matters such as debris or broken nails from entering the inside of the nail gun 1000 from between the striker 1 and the nail cover 2.

[0043] The sealing member 3 is fixedly arranged on the nail cover 2, and the sealing member 3 does not interfere with the forward and backward movement of the striker 1. Optionally, referring to Figure 1 , Figure 2 and Figure 4 , in this embodiment, the sealing member 3 comprises a sealing member body 32 sleeved on the striker 1, the annular sealing lip 31 is arranged on the sealing member body 32, and the sealing member body 32 and the striker 1 are gap-fitted.

[0044] Specifically, the sealing member 3 comprises a ring-shaped sealing lip 31 and a sealing member body 32, the sealing member body 32 is arranged in a circular ring shape or a cylindrical shape, the ring-shaped sealing lip 31 is located at the front side of the sealing member body 32, and the rear end of the ring-shaped sealing lip 31 is connected to the front surface of the sealing member body 32. The inner diameter of the sealing member body 32 is larger than the diameter of the first end 11 of the striker 1, so that the sealing member body 32 and the striker 1 are in clearance fit, so that the sealing member 3 can avoid interfering with the forward and backward movement of the striker 1.

[0045] The dustproof structure 100 of the utility model sets up the sealing member 3 between the first end 11 of the striker 1 and the perforation 21 of the nail cover 2, the ring-shaped sealing lip 31 of the sealing member 3 is in an inclined shape, and the inner diameter of the ring-shaped sealing lip 31 is larger than the diameter of the first end 11 of the striker 1, when the striker 1 moves along the direction from the first end 11 to the second end 12, the front and rear ends of the ring-shaped sealing lip 31 form a pressure difference (negative pressure is generated at the rear end), at this time, the ring-shaped sealing lip 31 will be pressed to the peripheral side surface of the first end 11 of the striker 1 under the action of the pressure difference, so as to realize the sealing effect, thereby preventing foreign matters such as chippings or broken nails from entering the inside of the nail gun 1000.

[0046] The specific setting position of the sealing member 3 on the nail cover 2 can be set according to the actual situation, and optionally, please refer to Figures 1 to 3 In the embodiment, the nail cover 2 is provided with a mounting groove 22 on the surface away from the second end 12, the perforation 21 is arranged on the groove bottom wall of the mounting groove 22, and the sealing member 3 is arranged in the mounting groove 22 and abuts against the groove bottom wall of the mounting groove 22.

[0047] Specifically, the nail cover 2 is provided with the mounting groove 22 with the slot opening facing forward on the front surface, the shape of the mounting groove 22 is generally matched with the shape of the sealing member body 32, the sealing member 3 is fixedly arranged in the mounting groove 22, and the rear surface of the sealing member body 32 abuts against the groove bottom wall of the mounting groove 22, by arranging the mounting groove 22 for accommodating the sealing member 3 on the nail cover 2, the installation and positioning of the sealing member 3 on the nail cover 2 can be realized.

[0048] Please refer to Figure 1 and Figure 5 , the slot opening of the mounting groove 22 is generally provided with a muzzle 500 extending along the front and rear directions, the rear end of the muzzle 500 communicates with the mounting groove 22, the nail gun 1000 comprises a nail magazine assembly 600, the muzzle 500 communicates with the upper end of the nail magazine assembly 600, so that the fasteners in the nail magazine assembly 600 can enter the muzzle 500. During the forward movement of the striker 1, the first end 11 of the striker 1 will enter the muzzle 500 from the mounting groove 22, so that the first end 11 of the striker 1 can fire the fasteners in the muzzle 500 forward.

[0049] The sealing member 3 is fixedly arranged in the mounting groove 22. The specific fixing manner of the sealing member 3 can be set according to actual conditions. For example, the sealing member 3 can be fixedly arranged in the mounting groove 22 by clamping or interference fit. Figure 1 、 Figure 3 and Figure 4 In this embodiment, the dustproof structure 100 further comprises a pressing member 4 arranged in the mounting groove 22, and the pressing member 4 abuts against one side of the sealing member 3 away from the second end 12.

[0050] Specifically, the pressing member 4 is fixedly arranged in the mounting groove 22, and the pressing member 4 abuts against the front side of the sealing member body 32. In this way, the sealing member 3 is clamped by the pressing member 4 and the groove bottom wall of the mounting groove 22 from front to back, so that the sealing member 3 can be firmly fixed on the nail cover 2.

[0051] The specific shape of the pressing member 4 can be set according to actual conditions. For example, the pressing member 4 can be arranged in the shape of a ring or an arc. Figure 1 、 Figure 3 and Figure 4 In this embodiment, the pressing member 4 is arranged in the shape of a ring, and the pressing member 4 is sleeved on the striker 1.

[0052] Specifically, the pressing member 4 is arranged in the shape of a ring extending along the circumference of the striker 1. Arranging the pressing member 4 in the shape of a ring can increase the abutting area between the pressing member 4 and the sealing member 3, which is conducive to firmly fixing the sealing member 3 in the mounting groove 22. In the following, the pressing member 4 arranged in the shape of a ring will be taken as an example for introduction.

[0053] Optionally, please refer to Figure 1 、 Figure 3 and Figure 4 In this embodiment, the inner diameter of the pressing member 4 is greater than the outer diameter of one end of the annular sealing lip 31 close to the second end 12.

[0054] Specifically, the inner diameter of the pressing member 4 is greater than the inner diameter of the largest part of the annular sealing lip 31 (i.e., the rear end of the annular sealing lip 31), so that the annular sealing lip 31 is located on the inner side of the pressing member 4. In this way, interference between the annular sealing lip 31 and the pressing member 4 can be avoided.

[0055] Optionally, please refer to Figure 1 、 Figure 3 and Figure 4 In this embodiment, the pressing member 4 is arranged in the mounting groove 22 in a manner capable of being adjusted in the extension direction of the striker 1.

[0056] Specifically, the abutting member 4 is arranged in the mounting groove 22 in a forward and backward movable adjustment mode, so that the installation position of the abutting member 4 in the mounting groove 22 can be adjusted forward and backward. During the adjustment of the installation position of the abutting member 4 in the mounting groove 22 forward and backward, the pre-tightening force of the abutting member 4 on the sealing member 3 can be adjusted, so that the problem of sealing failure of the sealing member 3 due to wear can be compensated.

[0057] The specific implementation mode of the forward and backward movable adjustment of the abutting member 4 can be set according to actual conditions. For example, a clamping protrusion can be arranged on the outer circumferential side surface of the abutting member 4, a clamping groove which is clamped and matched with the clamping protrusion is arranged on the inner groove side wall of the mounting groove 22, and a plurality of clamping grooves are arranged forward and backward in intervals. Thus, the forward and backward movable adjustment of the abutting member 4 can be realized by selectively clamping and matching the clamping protrusion with the plurality of clamping grooves.

[0058] Optionally, referring to Figure 1 , Figure 3 and Figure 4 , in the embodiment, an outer thread 41 is arranged on the outer circumferential side surface of the abutting member 4, and an inner thread which is threadedly matched with the outer thread 41 is arranged on the inner groove side wall of the mounting groove 22.

[0059] Specifically, the abutting member 4 is fixedly arranged in the mounting groove 22 through the threaded structure, and the abutting member 4 is arranged in the mounting groove 22 in a forward and backward movable adjustment mode. Thus, the installation position of the abutting member 4 in the mounting groove 22 can be adjusted forward and backward by rotating the abutting member 4.

[0060] Further, referring to Figure 1 , Figure 3 and Figure 4 , in the embodiment, a notch 42 is arranged on the surface of the abutting member 4 away from the second end 12, so as to rotate and adjust the abutting member 4 along the extension direction of the striker 1 through the notch 42.

[0061] Specifically, the notch 42 is arranged on the front surface of the abutting member 4, and the notch 42 is usually arranged in a radial direction of the abutting member 4. When it is needed to rotate and adjust the abutting member 4, a tool only needs to be inserted into the notch 42, so that the abutting member 4 can be conveniently and labor-savingly rotated by the tool.

[0062] The utility model also provides a nail gun, the nail gun can be lithium electric nail gun and the like, Figure 5 a preferable embodiment of the nail gun provided by the utility model is shown.

[0063] Please refer to Figure 5In the embodiment, the nail gun 1000 comprises a dustproof structure 100 and a driver 200, the driver 200 is power-coupled with the second end 12 of the striker 1 in the dustproof structure 100, so as to drive the striker 1 to move along the extension direction of the striker 1 relative to the nail cover 2 in the dustproof structure 100.

[0064] Specifically, the driver 200 can be a motor 200a, and the following will be introduced by taking the driver 200 as the motor 200a as an example. The motor 200a is power-coupled with the second end 12 of the striker 1, and the motor 200a can drive the striker 1 to move forward and backward relative to the nail cover 2. Since the dustproof structure 100 adopts the technical solutions of the above-mentioned embodiments, the beneficial effects brought by the technical solutions of the above-mentioned embodiments are also possessed.

[0065] Optionally, referring to Figure 1 , Figure 2 and Figure 5 In the embodiment, the nail gun 1000 further comprises a driving wheel 300, the driving wheel 300 is arranged at the driving end of the driver 200, and a gear and rack transmission structure is arranged between the driving wheel 300 and the second end 12.

[0066] Specifically, the motor 200a is arranged at the lower side of the second end 12 of the striker 1, and the transmission shaft of the motor 200a is arranged upward, the transmission shaft of the motor 200a can be connected with the driving wheel 300 through a speed reducer, so that the motor 200a can drive the driving wheel 300 to rotate through the speed reducer. The gear and rack transmission structure comprises a tooth portion arranged at the driving wheel 300 and a rack portion 13 arranged at the second end 12, the rack portion 13 is arranged along the front and back directions and is engaged with the tooth portion, so that the rotating driving wheel 300 can drive the striker 1 to move forward and backward through the gear and rack transmission structure.

[0067] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the drawings, or direct / indirect application in other related technical fields under the utility model concept of the utility model is included in the patent protection range of the utility model.

Claims

1. A dustproof structure, characterized in that, include: A firing pin having a first end and a second end opposite each other in the extending direction of the firing pin; A nail cover having a through hole for the first end to pass through, and a firing pin configured to move relative to the nail cover along the extension direction of the firing pin; A sealing element is sleeved on the firing pin and abuts against the side of the nail cover away from the second end. An annular sealing lip is protruding on the surface of the sealing element away from the second end. When the firing pin is stationary, the annular sealing lip is in clearance fit with the firing pin; when the firing pin moves from the first end to the second end, the annular sealing lip is attached to the circumferential side of the firing pin.

2. The dustproof structure as described in claim 1, characterized in that, An installation groove is provided on the surface of the nail cover away from the second end, the through hole is provided on the bottom wall of the installation groove, and the sealing element is provided in the installation groove and abuts against the bottom wall of the installation groove.

3. The dustproof structure as described in claim 2, characterized in that, The sealing element includes a sealing element body sleeved on the firing pin, an annular sealing lip extending from the sealing element body, the annular sealing lip being gradually inclined toward the firing pin from the second end toward the first end, and the sealing element body and the firing pin being clearance-fitted.

4. The dustproof structure as described in claim 2, characterized in that, The dustproof structure also includes a pressing member, which is disposed in the mounting groove and abuts against the side of the seal away from the second end.

5. The dustproof structure as described in claim 4, characterized in that, The pressing member is arranged in a ring shape and is sleeved on the outside of the firing pin.

6. The dustproof structure as described in claim 5, characterized in that, The pressing member is movably disposed within the mounting groove along the extension direction of the firing pin.

7. The dustproof structure as described in claim 6, characterized in that, The outer peripheral side of the pressing member is provided with an external thread, and the inner side wall of the mounting groove is provided with an internal thread that forms a threaded engagement with the external thread.

8. The dustproof structure as described in claim 7, characterized in that, The surface of the pressing member away from the second end is provided with a notch, so that the pressing member can be rotated and adjusted along the extension direction of the firing pin through the notch.

9. The dustproof structure as described in claim 5, characterized in that, The inner diameter of the pressing member is larger than the outer diameter of the end of the annular sealing lip closest to the second end.

10. A nail gun, characterized in that, include: A dustproof structure, wherein the dustproof structure is the dustproof structure as described in any one of claims 1-9; An actuator, which is dynamically coupled to the second end of the striker in the dustproof structure, to drive the striker to move relative to the nail cover in the dustproof structure along the extension direction of the striker.

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