CN214699157U - Piston assembly and nailing device - Google Patents

Abstract

The application discloses piston assembly and nailing device relates to nailing technical field. The piston assembly includes: the piston comprises a piston body, a piston rod and a piston connecting piece arranged between the piston body and the piston rod; one end fixed connection piston body of piston connector, the other end contact connection piston rod, and the piston rod is close to the one end of piston connector and is provided with the position piece that ends, and the position piece cooperates with the piston connector, prevents piston rod and piston connector relative rotation. The piston connecting piece is arranged between the piston body and the piston rod, one end of the piston connecting piece is fixedly connected with the piston body, and the other end of the piston connecting piece is in contact connection with the piston rod, so that when the piston rod is damaged, the whole piston assembly does not need to be replaced together, the cost is saved, or the piston rod does not need to be replaced after the piston assembly is detached from the nailing device, the time is saved, the piston rod can be easily detached from the nailing device independently, and the operation is convenient; by providing a stop member, the piston rod and the piston coupling are prevented from relative rotation.

Description

Piston assembly and nailing device

Technical Field

The application relates to the technical field of nailing, especially, relate to a piston assembly and nailing device.

Background

Most current nailers (or nailers) require a piston assembly to be used, and a piston rod (or firing pin) of the piston assembly is used to strike a nail so as to facilitate accurate driving of the nail into an object. The piston and the piston rod of the existing piston assembly are integrated or connected together in a threaded or riveting mode, and the piston rod are not easy to separate. In the use process, if the piston rod is damaged and needs to be replaced, the piston assembly must be replaced together; and for the energy storage type nailing device, high-pressure gas or gas-liquid mixture is stored in the cylinder body, if the piston assembly is replaced, the high-pressure gas or gas-liquid mixture in the cylinder body needs to be discharged, and after the piston assembly is replaced, the high-pressure gas or gas-liquid mixture is refilled into the cylinder body. Since the injection of high-pressure gas or gas-liquid mixture requires a dedicated injection tool or device, it is difficult for the user to perform such an operation, and the user must go to a special maintenance shop or manufacturer to replace the piston assembly, which causes inconvenience to the user. Therefore, when the piston rod is damaged, the piston assembly needs to be replaced together or the piston rod needs to be replaced after the piston assembly is detached from the nailing device, and the detachment and the installation are troublesome.

SUMMERY OF THE UTILITY MODEL

The application provides a piston assembly and nailing device for solve the problem among the prior art.

In order to solve the above problems, the present application provides:

a piston assembly, comprising: the piston comprises a piston body, a piston rod and a piston coupling piece arranged between the piston body and the piston rod;

one end of the piston connecting piece is fixedly connected with the piston body, the other end of the piston connecting piece is connected with the piston rod in a contact mode, a stopping piece is arranged at one end, close to the piston connecting piece, of the piston rod, and the stopping piece is matched with the piston connecting piece to prevent the piston rod and the piston connecting piece from rotating relatively.

As a further alternative of the piston assembly, the piston coupling includes a first connecting portion connecting the piston body and a second connecting portion connecting the piston rod.

As a further alternative of the piston assembly, the second connecting portion of the piston coupling member is provided with a latching groove along a radial direction, and the latching groove is matched with the stopper.

As a further alternative of the piston assembly, a side of the piston body near the piston coupling is provided with a convex portion, and the convex portion is fixedly connected with the first connecting portion.

As a further alternative of the piston assembly, the convex portion is provided with an internal thread, and an external thread is provided on an outer side wall of the first connecting portion, so that the convex portion and the first connecting portion are cooperatively connected with each other through the internal thread and the external thread.

As a further alternative of the piston assembly, one end of the piston rod near the piston coupling is provided with a third connecting portion, and the stopper is provided in a radial direction of the third connecting portion.

As a further alternative of the piston assembly, an end of the piston rod remote from the piston coupling is provided with a striking portion for striking a nail into an object.

The present application further provides:

a nailing device comprises the piston assembly.

As a further alternative of the nailing device, the middle part of the piston rod is provided with a plurality of meshing teeth which are engaged with a gear in the nailing device.

As a further alternative of the nailing device, a groove is formed in the side wall of the piston body, and a sealing ring is arranged in the groove, so that the cylinder body of the nailing device is closed.

The beneficial effect of this application is:

the application provides a piston assembly, through setting up the piston connector between piston body and piston rod, and one end of the piston connector is fixedly connected to the piston body detachably, another end contacts and connects the piston rod, when the piston rod is damaged, do not need to change the whole piston assembly together, save the cost, or does not need to dismantle the piston assembly from nailing device and then change the piston rod, save time, and then can take off the piston rod from contacting and connecting of piston rod and piston connector of the nailing device directly and easily alone, easy to operate; and one end of the piston rod close to the piston connector is provided with a stop member, and the piston rod and the piston connector are prevented from rotating relatively through the cooperation of the stop member and the piston connector.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 shows a schematic view of an assembled disassembled piston assembly of the present application;

FIG. 2 shows a schematic cross-sectional view of a piston assembly of the present application;

FIG. 3 is a schematic illustration of a piston coupling of the piston assembly of the present application;

FIG. 4 is a schematic illustration of a piston body of the piston assembly of the present application;

FIG. 5 is a schematic diagram of a piston rod of the piston assembly of the present application;

fig. 6 is a partially sectional structural schematic view showing a nailing device of the present application in a first state;

fig. 7 is a partially sectional structural schematic view showing a nailing device of the present application in a second state.

Description of the main element symbols:

10-a piston assembly; 100-a piston body; 110-a convex part; 120-grooves; 130-a sealing ring; 200-a piston coupling; 210-a first connection; 220-a second connection; 221-a snap groove; 300-a piston rod; 310-a third connection; 311-a stop member; 320-a strike portion; 330-meshing teeth; 340-hanging the table;

20-cylinder body; 30-a gear; 40-buffer cushion.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

Referring to fig. 1, the present application provides a piston assembly 10, which includes a piston body 100, a piston rod 300, and a piston coupling member 200 disposed between the piston body 100 and the piston rod 300, wherein one end of the piston coupling member 200 is used for fixedly connecting the piston body 100, so that the piston coupling member 200 is not easily separated from the piston body 100, and the other end of the piston coupling member 200 is used for contacting and connecting the piston rod 300, so that the piston rod 300 can be easily removed from the piston assembly 10; when the piston rod 300 is damaged during the use of the piston assembly 10, the damaged piston rod 300 can be easily removed and replaced by directly removing a partial cover plate and the like in the use device, so that the operation is convenient, and the cost and the time are saved.

Specifically, the connection between the piston connector 200 and the piston body 100 can be a detachable fixed connection, which is convenient for connection; the connection between the piston coupling 200 and the piston rod 300 can also be configured to be detachably connected, so as to realize the portable disassembly and assembly of the piston rod 300.

The end of the piston rod 300 close to the piston coupling member 200 is provided with a stop member 311, and the stop member 311 is connected with the piston coupling member 200 in a matching manner, so as to prevent the piston rod 300 and the piston coupling member 200 from rotating relatively, thereby affecting the operation of the piston assembly 10.

Further, with continued reference to fig. 2 and 3, the piston coupling 200 includes a first connecting portion 210 and a second connecting portion 220, wherein the first connecting portion 210 is used for connecting the piston body 100, and the second connecting portion 220 is used for connecting the piston rod 300, so as to achieve indirect connection of the piston rod 300 to the piston body 100, and when the piston rod 300 is damaged, the piston rod 300 is easily detached from the piston body 100.

Specifically, the first connecting portion 210 of the piston coupling member 200 is detachably connected to the piston body 100, and the second connecting portion 220 is detachably connected to the piston rod 300, so that the piston assembly 10 is convenient to mount and dismount; the second connecting portion 220 of the piston coupling member 200 has a cavity opened from an end surface thereof for accommodating one end of the piston rod 300, thereby achieving a contact connection between the piston rod 300 and the piston coupling member 200.

Further, referring to fig. 2 and fig. 3, the second connecting portion 220 of the piston coupling member 200 is provided with a locking groove 221 along the radial direction thereof, and the locking groove 221 is matched with the stop member 311 on the piston rod 300 to prevent the piston rod 300 and the piston coupling member 200 from rotating relatively.

Specifically, the shape of the locking groove 221 along the opening direction thereof may be a U-shaped groove or a V-shaped groove having an opening in one direction, and the locking groove 221 may be configured as a locking hole, that is, a through hole is formed along the radial direction on the side wall of the second connecting portion 220 to be a locking hole, so as to limit the relative rotation between the piston rod 300 and the piston coupling member 200.

In this embodiment, the locking groove 221 is a U-shaped groove, and the width of the locking groove 221 is not less than the width of the stop piece 311, so as to ensure that the stop piece 311 can be accommodated in the locking groove 221, thereby preventing relative rotation; correspondingly, the stop member 311 on the piston rod 300 is configured to be non-detachable, and because the structure of the stop member 311 is relatively small, the stop member 311 is configured to be non-detachable and connected to the piston rod 300, so that the stop member can be prevented from falling off and being lost.

In other embodiments, the locking groove 221 is a through hole, and correspondingly, the stop member 311 of the piston rod 300 is detachably connected, that is, a through hole is formed in the sidewall of the second connecting portion 220 of the piston coupling member 200 along the radial direction thereof, and correspondingly, another through hole with the same size is formed in the sidewall of the third connecting portion 310 of the piston rod 300 along the radial direction thereof, when the piston rod 300 is installed, the third connecting portion 310 of the piston rod 300 is received in the cavity of the second connecting portion 220 of the piston coupling member 200, the through hole of the piston rod 300 and the through hole of the piston coupling member 200 are aligned with each other, and then the stop member 311 is inserted through the through hole to restrict the rotation, and the stop member 311 acts as a pin to prevent the rotation of the piston rod 300 and the piston coupling member 200.

Further, with reference to fig. 2 and fig. 4, a protrusion 110 is disposed on a side of the piston body 100 close to the piston coupling member 200, and the protrusion 110 is used for connecting with the first connection portion 210 and is fixedly connected.

Specifically, the protrusion 110 and the piston body 100 may be integrated, so that the whole body is relatively stable; the protrusion 110 and the piston body 100 may be separated, and the protrusion 110 may be connected to the piston body 100 by welding or bolting.

Preferably, in the present embodiment, the convex portion 110 is integrally provided with the piston body 100, and the overall stability and strength are good.

Further, a cavity is formed in the convex portion 110, an internal thread is formed on the inner side wall of the convex portion 110, an external thread is formed on the outer side wall of the first connecting portion 210, and the internal thread and the external thread can be matched with each other, so that the convex portion 110 and the first connecting portion 210 are matched with each other.

In some embodiments, the first connecting portion 210 may be connected to the piston body 100 by bolts or the like, so that the first connecting portion 210 and the piston body 100 can be firmly connected together.

Further, with continued reference to fig. 2 and 5, one end of the piston rod 300 near the piston coupling element 200 is provided with a third connecting portion 310, and the stop member 311 is disposed along a radial direction of the third connecting portion 310.

Specifically, the stopper 311 may be a round pin body, a square pin body, or other cylindrical body.

In the present embodiment, the stop member 311 is fixedly disposed on the piston rod 300 and is non-detachably connected to the piston rod 300, i.e. the stop member 311 is integrally disposed with the piston rod 300.

In other embodiments, the stop member 311 and the piston rod 300 may be provided in a separate manner, a through hole is formed in a side wall of the third connecting portion 310 of the piston rod 300 along a radial direction thereof, and the stop member 311 passes through the through hole and is connected to the piston rod 300 by a non-detachable manner such as welding connection or other detachable connection manners.

Further, with continued reference to fig. 2 and 5, the end of the piston rod 300 away from the piston coupling element 200 is provided with an impact portion 320, and the impact portion 320 can be used for impacting a nail, thereby facilitating the nail to be driven into an object.

The piston assembly 10 provided by the application realizes the limitation of the relative rotation of the piston rod 300 and the piston coupling 200 by arranging the piston coupling 200 between the piston body 100 and the piston rod 300, and simultaneously realizing the thread fixed connection between the first connecting part 210 of the piston coupling 200 and the convex part 110 of the piston body 100, and the second connecting part 220 of the piston coupling 200 is provided with the locking groove 221 to be matched with the stop part 311 of the third connecting part 310 of the piston rod 300; and the second connection part 220 of the piston coupling 200 is in contact connection with the piston rod 300, thereby achieving easy disassembly and assembly of the piston rod 300.

Example two

Referring to fig. 6 and 7, a nailing device is also provided including a piston assembly 10 provided in the first embodiment. The nailing device comprises a sealed cylinder body 20, wherein high-pressure gas or gas-liquid mixture is stored in the cylinder body 20 to provide certain pressure; the nailing device may also include an irregular gear 30.

Further, referring to fig. 5, the middle of the piston rod 300 of the piston assembly 10 is further provided with a plurality of engaging teeth 330, and the engaging teeth 330 can cooperate with the teeth on the irregular gear 30 to push the piston assembly 10 toward the upper portion of the cylinder 20, so as to store a certain pressure for subsequent nailing.

Specifically, the number and position of the meshing teeth 330 on the piston rod 300 can be adjusted accordingly according to the number of teeth of the irregular gear 30 in the nailing device; the piston rod 300 is further provided with a hanging stand 340 at a side thereof adjacent to the third connecting portion 310, which prevents the piston rod 300 from falling off during use of the nailing device.

Further, referring to fig. 2 and 4, a groove 120 is formed on a side wall of the piston body 100 of the piston assembly 10, and a sealing ring 130 is disposed in the groove 120 to seal the cylinder 20, so as to prevent a high-pressure gas or a gas-liquid mixture in the cylinder 20 of the nailing device from leaking and further causing a failure of the nailing device.

The nailing device comprises two states in the using process, wherein the first state is an energy storage state to be nailed, and the second state is a nail pushing completion state (also a nailing completion state) of the piston assembly 10; fig. 6 shows the structural distribution of the nailing device in the first state, and fig. 7 shows the structural distribution of the nailing device in the second state.

Referring to fig. 6, in the process of the nailing device entering the first state, the irregular gear 30 rotates to drive the piston rod 300 to push the entire piston assembly 10 to move upward, and during the upward movement, the gas or gas-liquid mixture in the cylinder 20 is squeezed to increase the pressure or store energy; when the irregular gear 30 is rotated to the position of the last tooth, the piston assembly 10 is moved upward to the highest position accordingly, and the nailing device is in the first state.

Specifically, in the first state of the nailing device, the upper end of the piston rod 300 is pressed downward by the piston coupling 200, and the lower end engagement teeth 330 are pressed upward by the gear 30, so that the piston rod 300 is not disengaged from the piston coupling 200.

Referring to fig. 7, when the nailing device enters the second state, that is, when the irregular gear 30 rotates at the tooth-free position, the piston assembly 10 moves downward due to the gas or gas-liquid mixture with higher pressure in the cylinder 20, and the impact force of the downward movement causes the striking portion 320 of the piston rod 300 to strike the nail at the bottom, so that the nail can be quickly and easily nailed into the object.

In the process of downward movement of the piston assembly 10, correspondingly, one side of the irregular gear 30 close to the piston rod 300 is just the side without teeth, and after the nail is driven, the first tooth of the irregular gear 30 starts to rotate to the position of the first meshing tooth 330 at the upper end of the piston rod 300 for corresponding matching, so that the energy storage can be realized again.

Specifically, when the nailing device is in the second state, the upper portion of the piston body 100 is acted by the high-pressure gas or the gas-liquid mixture in the cylinder 20, the lower portion is acted by the reaction of the cushion pad 40, the resultant force applied thereto is zero, and the contact connection surface of the piston rod 300 and the piston coupling member 200 is in an unstressed loose state.

In the using process of the nailing device, if the piston rod 300 is damaged and needs to be replaced, the gear 30 is only required to be adjusted to be in a non-meshed state with the piston rod 300, and then parts such as bottom covers of the nailing device are detached, so that the piston rod 300 can be conveniently taken out for replacement, the whole piston assembly 10 does not need to be replaced, the operation is convenient, and the time and the cost are saved.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. A piston assembly, comprising: the piston comprises a piston body, a piston rod and a piston coupling piece arranged between the piston body and the piston rod;

one end of the piston connecting piece is fixedly connected with the piston body, the other end of the piston connecting piece is connected with the piston rod in a contact mode, a stopping piece is arranged at one end, close to the piston connecting piece, of the piston rod, and the stopping piece is matched with the piston connecting piece to prevent the piston rod and the piston connecting piece from rotating relatively.

2. The piston assembly of claim 1 wherein said piston coupling includes a first connecting portion and a second connecting portion, said first connecting portion connecting said piston body and said second connecting portion connecting said piston rod.

3. The piston assembly as set forth in claim 2 wherein said second connecting portion of said piston coupling member is formed with a latching groove in a radial direction, said latching groove being engaged with said stopper.

4. The piston assembly of claim 2 wherein said piston body is provided with a projection on a side thereof adjacent said piston coupling, said projection being fixedly connected to said first connecting portion.

5. The piston assembly of claim 4, wherein the protrusion is provided with an internal thread, and an external thread is provided on an outer side wall of the first connecting portion, so that the protrusion and the first connecting portion are cooperatively connected with each other through the internal thread and the external thread.

6. The piston assembly of claim 1 wherein said piston rod is provided with a third connecting portion at an end thereof adjacent said piston coupling, said stop member being disposed in a radial direction of said third connecting portion.

7. The piston assembly of claim 1 wherein an end of said piston rod remote from said piston coupling is provided with a striking portion for striking a nail into an object.

8. A nailing device comprising the piston assembly of any of claims 1 to 7.

9. The nailing device of claim 8, wherein the piston rod is provided with a plurality of engaging teeth at a central portion thereof, the engaging teeth cooperating with a gear in the nailing device.

10. The nailing device of claim 8, wherein a recess is provided in the sidewall of the piston body, and a sealing ring is provided in the recess to seal the cylinder of the nailing device.

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