A connecting structure of a cylinder body and a rear end cover in a gas compression energy storage mechanism of an electric nail gun

Abstract

The utility model discloses a kind of connecting structure of cylinder body and rear end cover in electric nail gun gas compression energy storage mechanism, including rear end cover and coaxially arranged inner cylinder, outer cylinder, the outer wall of the inner cylinder is spaced apart and is provided with several connection ribs integrally formed with outer cylinder in circumferential direction, the rear end face of the inner cylinder is retracted a distance relative to the rear end face of outer cylinder and forms an installation space, at least one adapter plate is provided in this installation space, several locking holes and fixed holes are provided on adapter plate, each locking hole is fixed on the rear end face of inner cylinder or / and the mounting seat on the inner wall of outer cylinder by locking screw, while each fixed hole is connected with the mounting post on rear end cover by fixed screw and realizes the fixed connection of rear end cover in outer cylinder. The present application realizes the connection between rear end cover and cylinder by built-in fixed connection structure, with compact structure, good sealing effect, the characteristics of economical processing cost.

Description

Technical Field

[0001] This invention relates to a gas compression energy storage mechanism for an electric nail gun, specifically a connection structure between the cylinder and the rear end cover in a gas compression energy storage mechanism for an electric nail gun. Background Technology

[0002] Patent CN219902040U discloses an integrated cylinder structure for an electric nail gun gas compression energy storage mechanism, specifically disclosing a rear end cover and an inner cylinder and an outer cylinder arranged coaxially. The outer wall of the inner cylinder is provided with several connecting ribs integrally formed with the outer cylinder along the circumferential direction. The rear end cover is provided with an outer circle, and the outer wall of the outer circle is provided with an external thread that connects to the internal thread of the tail end of the outer cylinder. In order to ensure the connection is sealed, a sealing rubber ring is provided between the outer circle and the tail end of the outer cylinder.

[0003] After years of use, it has been found that the above-mentioned structure with a large-diameter external thread directly set on the outer circle has great shortcomings. During the assembly process, the rotation of the external thread will inevitably cause the sealing ring to rotate to a certain extent. The rotation of the sealing ring will cause it to shift and deform, which may lead to seal failure in severe cases, and then cause problems with the sealing of the cylinder and the rear end cover.

[0004] And such Figure 1 As shown, this is the second type of connection structure between the cylinder block and the rear end cover currently on the market. This connection structure has multiple protruding connecting components spaced circumferentially between the outer contours of the rear end cover 1′ and the outer cylinder block 2′. Each connecting component includes a connecting part 11′ on the rear end cover and a connecting part 21′ on the outer cylinder block. The corresponding connecting parts 11′ and 21′ are connected by screws 3′. Although this axial assembly connection structure can solve the problem of rotational displacement and deformation of the sealing ring during the assembly process of the rear end cover 1′ and the outer cylinder block 2′, it will increase the overall volume and make it more difficult to process the cylinder block. Compared with other parts, the protruding setting of the connecting part 21′ on the outer cylinder block will increase the processing difficulty of the surface of the outer cylinder block 2′. During processing, excess consumables from other parts need to be cut off, which not only causes a large amount of consumable waste, but also greatly increases the processing time of a single cylinder block, thus inevitably increasing the production cost of the cylinder block. Summary of the Invention

[0005] To address the aforementioned problems, this invention designs a connection structure between the cylinder and the rear end cover in an electric nail gun gas compression energy storage mechanism. This structure achieves the connection between the rear end cover and the cylinder through a built-in fixed connection structure, featuring a compact structure, good sealing effect, and economical processing cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A connection structure between the cylinder and the rear end cover in a gas compression energy storage mechanism for an electric nail gun includes a rear end cover and an inner cylinder and an outer cylinder arranged coaxially. The outer wall of the inner cylinder has several connecting ribs integrally formed with the outer cylinder at circumferential intervals. The characteristic feature is that the rear end face of the inner cylinder is recessed inwards relative to the rear end face of the outer cylinder by a certain distance to form an installation space. At least one adapter plate is provided in this installation space. The adapter plate has several locking holes and fixing holes. Each locking hole is fixed to a mounting seat on the rear end face of the inner cylinder and / or the inner wall of the outer cylinder by locking screws. Simultaneously, each fixing hole is connected to a mounting post on the rear end cover by fixing screws to achieve a fixed connection between the rear end cover and the outer cylinder.

[0007] More specifically, the aforementioned adapter plate is provided with several air vents.

[0008] More specifically, the aforementioned rear end cover is provided with an outer circular portion that can be inserted into the outer cylinder body, and the rear end cover is provided with a connecting outer edge on the outer side of the outer circular portion, and a sealing ring is provided between the connecting outer edge and the sealing groove on the rear end face of the outer cylinder body.

[0009] More specifically, the aforementioned adapter plate adopts a one-piece molded structure or is composed of multiple thin plates stacked together.

[0010] This invention achieves an internal fixed connection between the rear end cover and the outer cylinder body through the inward retraction of the inner cylinder body tail and the setting of the adapter plate. This connection structure not only fundamentally solves the problem of displacement and deformation of the sealing ring during assembly, but also eliminates the problem of outward protrusion of the rear end cover and the outer cylinder body surface. It has the characteristics of good sealing performance, simple processing and economical cost. Attached Figure Description

[0011] Figure 1 A three-dimensional structural diagram of the existing structure with an outwardly protruding connecting part; Figure 2 A cross-sectional view of the present invention; Figure 3 An exploded view of the three-dimensional structure of the present invention; Figure 4 A three-dimensional structural exploded view of the present invention from another perspective; Figure 5 A three-dimensional structural diagram of the adapter plate of the present invention; Among them, Figure 1 In the middle, 1′—rear end cover, 2′—outer cylinder body, 11′—connecting part on the rear end cover, 21′—connecting part on the outer cylinder body, 3′—screw; exist Figure 2-5In the middle section, 1—rear end cover, 11—mounting post, 12—outer circle, 13—connecting outer edge, 2—outer cylinder body, 21—mounting seat, 22—sealing groove, 3—inner cylinder body, 31—connecting rib, 32—rear end face of the inner cylinder body, 4—installation space, 5—adapter plate, 5a—thin plate, 51—locking hole, 511—locking screw, 52—fixing hole, 521—fixing screw, 522—notched gasket, 53—vent hole, 6—sealing ring. Detailed Implementation

[0012] like Figure 2-5 As shown, a connection structure between the cylinder and the rear end cover in a gas compression energy storage mechanism for an electric nail gun includes a rear end cover 1 and an outer cylinder 2 and an inner cylinder 3 coaxially arranged. The outer wall of the inner cylinder 3 is provided with a plurality of connecting ribs 31 integrally formed with the outer cylinder 2 at circumferential intervals. The inner cavity of the inner cylinder 3 constitutes the working piston chamber, and the gap between the inner and outer cylinders constitutes the gas storage chamber.

[0013] The rear end face 32 of the inner cylinder is recessed by a certain distance relative to the rear end face of the outer cylinder 2 to form an installation space 4, which also serves as an airflow channel connecting the piston chamber and the gas storage chamber.

[0014] The installation space is provided with at least one adapter plate 5. This illustration only describes the structure with two adapter plates 5. In practice, depending on the cylinder block size, one or more adapter plates 5 can be selected, and the resulting technical effect is the same as that with two adapter plates 5, so it will not be repeated here. To ensure balanced force distribution, the two adapter plates 5 are evenly spaced along the circumference.

[0015] The adapter plate 5 is provided with a plurality of locking holes 51 and fixing holes 52. Each locking hole 51 is used to fix the adapter plate 5 to the rear end face of the inner cylinder 3 by locking screws 511, or the locking hole 51 is used to fix the adapter plate 5 to the mounting seat 21 on the inner wall of the outer cylinder 2 by locking screws 511, or the locking hole 51 is used to fix the adapter plate 5 to both the rear end face of the inner cylinder 3 and the mounting seat 21 on the inner wall of the outer cylinder 2 by locking screws 511. The third structure is used in this figure. In practice, the first or second structure can also be selected as needed.

[0016] Each fixing hole 52 on the adapter plate 5 is connected to the mounting post 11 on the rear end cover 1 by fixing screws 521 to achieve a fixed connection between the rear end cover 1 and the outer cylinder body 2. In order to prevent loosening, a notched washer 522 is provided on the fixing screw 521.

[0017] Here, in order to ensure the sealing of the connection between the rear end cover 1 and the outer cylinder 2, the rear end cover 1 is provided with an outer circular part 12 that can be inserted into the outer cylinder. At the same time, the rear end cover 1 is provided with a connecting outer edge 13 on the outside of the outer circular part 11. A sealing ring 6 is provided between the connecting outer edge 13 and the sealing groove 22 provided on the rear end face of the outer cylinder 2.

[0018] In summary, this invention achieves internal fixation between the rear end cover 1 and the outer cylinder body 2 through the inward recessed design of the inner cylinder body 3 and the fixed connection of the adapter plate 5. During the entire installation process, the rear end cover 1 will not rotate relative to the outer cylinder body 2, fundamentally solving the problem of displacement and deformation caused by the passive rotation of the sealing ring 6 during assembly, thus ensuring the sealing performance between the rear end cover 1 and the outer cylinder body 2. Simultaneously, this internal fixed connection structure eliminates the problem of outward protrusion of the outer walls of the rear end cover 1 and the outer cylinder body 2, effectively simplifying the outer wall structure of the rear end cover 1 and the outer cylinder body 2. This not only simplifies processing but also avoids unnecessary material waste, resulting in cost-effectiveness.

[0019] Furthermore, to avoid obstructing the outlet of the inner cylinder 3, the adapter plate 5 is designed in a crescent shape so that it will not cover the rear outlet of the inner cylinder 3 after installation. Also, considering that the adapter plate 5 might obstruct the flow of air, it is provided with several air guide holes 53 to ensure smooth airflow.

[0020] The adapter plate 5 adopts an integral molding structure. However, in practice, considering the need for convenient processing and thickness adjustment, the adapter plate 5 can also be composed of multiple thin plates 5a stacked together. This illustration only describes the structure using double thin plates 5a.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A connection structure between the cylinder and the rear end cover in a gas compression energy storage mechanism for an electric nail gun, comprising a rear end cover (1) and an outer cylinder (2) and an inner cylinder (3) coaxially arranged, wherein a plurality of connecting ribs (31) integrally formed with the outer cylinder (2) are arranged at intervals along the circumferential direction on the outer wall of the inner cylinder (3), characterized in that: The rear end face (32) of the inner cylinder is recessed by a certain distance relative to the rear end face of the outer cylinder (2) to form an installation space (4). At least one adapter plate (5) is provided in the installation space (4). The adapter plate (5) is provided with several locking holes (51) and fixing holes (52). Each locking hole (51) fixes the adapter plate (5) to the mounting seat (21) on the rear end face of the inner cylinder (3) and / or the inner wall of the outer cylinder (2) by locking screws (511). At the same time, each fixing hole (52) is connected to the mounting post (11) on the rear end cover (1) by fixing screws (521) to realize the fixed connection of the rear end cover (1) to the outer cylinder (2).

2. The connection structure between the cylinder and the rear end cover in the gas compression energy storage mechanism of an electric nail gun as described in claim 1, characterized in that: The adapter plate (5) is provided with several air guide holes (53).

3. The connection structure between the cylinder and the rear end cover in the gas compression energy storage mechanism of an electric nail gun as described in claim 1 or 2, characterized in that: The rear end cover (1) is provided with an outer circular part (12) that can be inserted into the outer cylinder body. The rear end cover (1) is provided with a connecting outer edge (13) on the outside of the outer circular part (12). A sealing ring (6) is provided between the connecting outer edge (13) and the sealing groove (22) on the rear end face of the outer cylinder body (2).

4. The connection structure between the cylinder and the rear end cover in the gas compression energy storage mechanism of an electric nail gun as described in claim 1 or 2, characterized in that: The adapter plate (5) is made of an integral molding structure or is composed of multiple thin plates (5a) stacked together.

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