Split type cylinder body, air cylinder, force supply device and nail gun

Abstract

The utility model discloses a split type cylinder body, air cylinder, force supply device and nail gun, wherein the split type cylinder body comprises a cylinder head seat and an outer cylinder body, one end of the outer cylinder body is provided with an opening, the cylinder head seat and the outer cylinder body are arranged in a split mode, the cylinder head seat is fixedly assembled at the opening of the outer cylinder body, and the outer cylinder body is fixedly assembled at the opening of the outer cylinder body. The shape of an inner cavity is complex and casting defects are prone to occurring due to traditional integrated casting, the outer cylinder body and the cylinder head base can be machined separately, machining difficulty caused by a complex structure is avoided, the casting defects are reduced, the yield is improved, damaged parts are allowed to be replaced independently through a split structure, the air cylinder does not need to be replaced integrally, and the maintenance cost is reduced. The cylinder head seat and the outer cylinder body are independent parts, different materials can be adopted according to actual requirements, and the performance and the cost are further optimized.

Description

Technical Field

[0001] This utility model relates to the field of nail gun technology, and in particular to a split cylinder body, a cylinder, a power supply device, and a nail gun. Background Technology

[0002] In the construction and decoration industry, nail guns are widely used as efficient and convenient fastening tools for joining various materials. Their working principle primarily relies on a firing pin in an internal cylinder using high-pressure gas or spring force to rapidly impact the nail, thus driving it into the target material. However, the manufacturing process of the core component of the nail gun—the cylinder body—especially the design and production of the cylinder head seat, faces a series of technical challenges.

[0003] Currently, the cylinder body of nail guns is typically manufactured using a one-piece casting process. This method ensures the integrity and strength of the cylinder body structure while simplifying the manufacturing process. However, in practical applications, to allow the firing pin to pass smoothly and complete the firing action, a clearance hole must be provided on the side of the cylinder body facing the gun head. Considering the airtightness requirements of nail gun operation, this clearance hole needs to be minimized in size as much as possible to ensure that the internal pressure is not excessively high due to the hole size, which would lead to high airtightness design costs and affect the nail-shooting effect.

[0004] However, this design introduces new problems: the presence and size limitations of the clearance holes cause the cylinder head seat portion of the cylinder block to taper. While this structural feature contributes to airtightness, it significantly increases the complexity of the casting process. Specifically, the complex internal cavity shape not only places higher demands on mold design but also makes the casting process prone to defects such as incomplete filling and air bubble inclusions. These problems greatly affect the product yield and quality stability.

[0005] Furthermore, for the critical component of the cylinder head seat, the constriction structure may increase the difficulty of machining, especially when performing subsequent airtightness treatment. After casting, the surface of the complex part is rougher, which means that the surface of this part needs to be processed again in advance during the airtightness treatment, thus increasing the processing cost. Utility Model Content

[0006] In order to overcome at least one of the defects of the prior art, the present invention provides a split cylinder body, cylinder, power supply device and nail gun, which can solve the problems of high processing difficulty and poor processing accuracy caused by the integrated casting production of cylinder head seat and outer cylinder body.

[0007] The technical solution adopted by this utility model to solve its problem is:

[0008] A split-type cylinder block, comprising:

[0009] Cylinder head seat;

[0010] An outer cylinder body, wherein one end of the outer cylinder body is provided with an opening;

[0011] The cylinder head seat and the outer cylinder body are separately configured, and the cylinder head seat is fixedly assembled to the opening of the outer cylinder body.

[0012] Furthermore, the outer cylinder body is integrally formed by stretching profiles.

[0013] Furthermore, it also includes:

[0014] An inner cylinder body, wherein the inner cylinder body is disposed inside the outer cylinder body;

[0015] A bushing is fitted onto the inner cylinder body, and the bushing is sealed and fitted tightly to the inner cylinder body;

[0016] The outer wall of the bushing is sealed and fitted to the inner wall of the outer cylinder.

[0017] Furthermore, a first sealing element is provided between the inner wall of the insert and the outer wall of the inner cylinder, the first sealing element being used to seal the gap between the insert and the inner cylinder.

[0018] Furthermore, a second sealing element is provided between the inner wall of the outer cylinder and the outer wall of the bushing, the second sealing element being used to seal the gap between the outer cylinder and the bushing.

[0019] Furthermore, the cylinder head seat includes an insertion portion that inserts into the opening and an exposed portion that abuts against the end face of the outer cylinder body.

[0020] Furthermore, the cylinder head seat and the outer cylinder body are fixedly connected by bolts, or the cylinder head seat and the outer cylinder body adopt a threaded fixing structure.

[0021] This utility model also provides a cylinder, including the above-mentioned split cylinder body.

[0022] This utility model also provides a power supply device, including:

[0023] firing pin assembly;

[0024] In the aforementioned cylinder body, the striker assembly is slidably disposed inside the outer cylinder body, and the cylinder head seat is provided with a clearance hole for the striker assembly to pass through.

[0025] This utility model also provides a nail gun, including the above-mentioned power supply device.

[0026] In summary, the split-type cylinder body, cylinder, power supply device, and nail gun provided by this utility model have the following technical effects:

[0027] 1. Traditional one-piece casting results in complex internal cavity shapes, which are prone to casting defects (such as porosity and shrinkage). The outer cylinder block and cylinder head seat can be machined separately, avoiding machining difficulties caused by complex structures, reducing casting defects, and improving yield.

[0028] 2. The split design allows for the replacement of damaged parts (such as the cylinder head or outer cylinder block) individually, without the need to replace the entire cylinder, thus reducing maintenance costs.

[0029] 3. The cylinder head and outer cylinder block are independent components, and different materials can be used according to actual needs to further optimize performance and cost. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 This is a first-view exploded structural diagram of the present invention;

[0032] Figure 3 This is a second-view exploded structure diagram of the present invention;

[0033] Figure 4 This is a cross-sectional structural diagram of the cylinder head seat and outer cylinder body of this utility model, which are connected by bolts.

[0034] Figure 5 This is a cross-sectional view of the cylinder head seat and outer cylinder body of this utility model, which are connected by a threaded connection.

[0035] The meanings of the reference numerals in the attached drawings are as follows: 1. Cylinder head seat; 11. Insertion part; 12. Exposed part; 2. Outer cylinder body; 21. Opening; 3. Inner cylinder body; 4. Sleeve; 5. First seal; 6. Second seal. Detailed Implementation

[0036] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0037] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.

[0038] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0040] See Figures 1-5 This utility model discloses a split cylinder body, including a cylinder head seat 1 and an outer cylinder body 2. One end of the outer cylinder body 2 is provided with an opening 21. The cylinder head seat 1 and the outer cylinder body 2 are separately arranged, and the cylinder head seat 1 is fixedly assembled at the opening 21 of the outer cylinder body 2.

[0041] Specifically, the cylinder head seat 1 is located at the front end of the cylinder, responsible for supporting the striker assembly 7 and allowing the striker to pass through the clearance hole. The outer cylinder body 2 serves as the main frame of the cylinder, with an opening 21 at one end. The cylinder head seat 1 and the outer cylinder body 2 are separately set up, with the cylinder head seat 1 assembled at the opening 21. The separate setting of the cylinder head seat 1 and the outer cylinder body 2 facilitates the separate machining of the cylinder head seat 1 and the outer cylinder body 2, avoiding the complex internal shape of the cylinder body, which is prone to casting defects (such as porosity and shrinkage porosity) and reduces the yield.

[0042] In some embodiments, the outer cylinder body 2 is integrally formed by stretching a profile.

[0043] Specifically, the outer cylinder body 2 needs to withstand the high-pressure gas impact of the nail gun during operation. However, the casting process is prone to internal defects such as porosity, shrinkage, and cracks. These defects can expand into leakage channels under high-pressure cyclic loads, leading to the failure of the power supply structure. Based on these structural defects, the thickness of the outer cylinder body 2 is generally increased to compensate for the casting process defects, thus providing safety redundancy. Although with continuous improvement in casting technology, the porosity can be reduced to a very low level using advanced casting auxiliary equipment, the latent nature of porosity defects means that even with improved casting technology, it is still impossible to reduce the thickness of the outer cylinder body 2 during production. This means that the design thickness of the rear cover for safety redundancy must still be retained, leading to material waste, increased weight, larger size, and increased cost. Furthermore, during the assembly of the outer cylinder block 2 with other cylinder block components, it is necessary to assemble the outer cylinder block 2 with other cylinder block components. Correspondingly, there are requirements for the airtightness of the contact parts between the outer cylinder block 2 and other cylinder block components. However, the surface of the outer cylinder block 2 processed by the casting process is relatively rough and cannot be used directly in scenarios with high airtightness requirements and high air pressure. It is necessary to perform secondary surface processing on the cast back cover before it can be used, which leads to an increase in the number of processes, and consequently, an increase in time and production costs.

[0044] To address the aforementioned issues, the outer cylinder body 2 is integrally formed using profile stretching. The profile stretching process directly shapes the cylinder through the plastic deformation of sheet / bar metal (such as aluminum alloy or steel), creating a smooth inner cavity without the need for complex molds, thus avoiding the defects caused by the complex structure of traditional casting. Furthermore, the profile stretching process is mature and controllable, reducing material waste and improving production efficiency.

[0045] Furthermore, the surface roughness of the one-piece cast structure is poor, requiring additional machining (such as grinding and polishing) to meet airtightness requirements, which increases costs. The inner wall surface of the drawn outer cylinder 2 is smooth, requiring no further finishing and directly meeting sealing and assembly requirements. In particular, the opening 21 of the outer cylinder 2 requires a sealed connection; using a profile drawing process fully meets the airtightness requirements of the cylinder and also provides design and assembly convenience for the sealing treatment when the outer cylinder 2 is sealed to the subsequent bushing 4.

[0046] Furthermore, the profile stretching process directly forms the sheet metal, significantly improving material utilization (especially suitable for long cylindrical structures like the outer cylinder block 2). More importantly, profile stretching eliminates the need to consider structural defects inherent in casting production. Consequently, there is no need to reserve thickness redundancy for these defects. Therefore, during the machining of the outer cylinder block 2, its thickness can be reduced as much as possible while ensuring its strength meets requirements, thereby reducing its weight, volume, and production costs.

[0047] See Figure 2 and Figure 3 As shown, in some embodiments, the cylinder body further includes an inner cylinder body 3 and a sleeve 4. The inner cylinder body 3 is disposed inside the outer cylinder body 2, and the sleeve 4 is fitted on the inner cylinder body 3 and is sealed to the inner cylinder body 3. The outer wall of the sleeve 4 is sealed to the inner wall of the outer cylinder body 2.

[0048] Specifically, the cylinder body also includes an inner cylinder body 3 and a bushing 4. The inner cylinder body 3 is located inside the outer cylinder body 2, and the bushing 4 is fitted onto the inner cylinder body 3. The bushing 4 and the inner cylinder body 3 are sealed together, thus ensuring airtightness between the bushing 4 and the inner cylinder body 3. The outer wall of the bushing 4 is sealed together with the inner wall of the outer cylinder body 2, thus ensuring airtightness between the bushing 4 and the outer cylinder body 2, thereby achieving a seal at one end of the opening 21 of the outer cylinder body 2. The cylinder head seat 1 is located in the direction of the bushing 4 facing the opening 21. That is, based on the structure of setting the bushing 4, the cylinder head seat 1 does not need to bear the sealing function. Correspondingly, the cylinder head seat 1 can be produced using a casting process with lower production costs. Since the cylinder head seat 1 and the outer cylinder body 2 are set separately, the complexity of the inner cavity of the cylinder head seat 1 is greatly reduced. Correspondingly, the casting difficulty of the cylinder head seat 1 is reduced, and the casting yield is also higher.

[0049] See Figures 2-4 As shown, in some embodiments, a first sealing element 5 is provided between the inner wall of the bushing 4 and the outer wall of the inner cylinder 3. The first sealing element 5 is used to seal the gap between the bushing 4 and the inner cylinder 3.

[0050] Specifically, when the insert 4 is fitted onto the inner cylinder 3, the insert 4 and the inner cylinder 3 have a fitting part, and the first sealing member 5 is located at the fitting part to seal the gap between the insert 4 and the inner cylinder 3, thereby achieving the airtightness requirement.

[0051] Optionally, the inner wall of the bushing 4 and / or the outer wall of the inner cylinder 3 may be provided with a groove at the position where the first seal 5 is assembled, so as to limit the first seal 5, facilitate the installation of the first seal 5, and prevent the first seal 5 from being displaced.

[0052] Of course, multiple first seals 5 can be provided as needed, and correspondingly, the number of grooves used to limit the first seals 5 can also be set accordingly, so as to effectively limit each first seal 5.

[0053] See Figures 2-4 As shown, in some embodiments, a second seal 6 is provided between the inner wall of the outer cylinder 2 and the outer wall of the bushing 4. The second seal 6 is used to seal the gap between the outer cylinder 2 and the bushing 4.

[0054] Similarly, when the insert 4 is installed inside the outer cylinder 2, the outer wall of the insert 4 is at least partially in contact with the inner wall of the outer cylinder 2. The second sealing element 6 is installed on the part where the outer wall of the insert 4 is in contact with the inner wall of the outer cylinder 2, and is used to seal the gap between the outer cylinder 2 and the insert 4, thereby achieving the airtightness requirement.

[0055] Optionally, the inner wall of the outer cylinder 2 and / or the outer wall of the bushing 4 may be provided with a groove at the position where the second seal 6 is assembled, so as to limit the second seal 6, facilitate the installation of the second seal 6, and prevent the second seal 6 from being displaced.

[0056] Of course, multiple second seals 6 can be provided as needed, and correspondingly, the number of grooves used to limit the second seals 6 can also be set accordingly, so as to effectively limit each second seal 6.

[0057] See Figure 2 and Figure 3 As shown, in some embodiments, the cylinder head seat 1 includes an insertion portion 11 with an insertion opening 21 and an exposed portion 12 that abuts against the end face of the outer cylinder body 2.

[0058] Specifically, the cylinder head seat 1 includes an insertion part 11 and an exposed part 12. The insertion part 11 is used to insert into the opening 21 of the outer cylinder body 2, and the exposed part 12 is the part of the cylinder head seat 1 located outside the outer cylinder body 2, providing protection for the end face of the outer cylinder body 2.

[0059] Optionally, the outer wall of the insertion part 11 fits snugly against the inner wall of the outer cylinder 2, so that the insertion part 11 can support the opening 21 of the outer cylinder 2 and ensure that the outer cylinder 2 is not easily deformed.

[0060] In some embodiments, the cylinder head seat 1 and the outer cylinder body 2 are fixedly connected by bolts, or the cylinder head seat 1 and the outer cylinder body 2 are fixed by threads.

[0061] Specifically, when the cylinder head seat 1 and the outer cylinder body 2 are connected by bolts, refer to... Figure 4 As shown, corresponding connecting ears are provided on the outer surfaces of the outer cylinder body 2 and the cylinder head seat 1, and bolts are used to connect and fix them. The specific number of bolts used can be set according to specific needs. Correspondingly, multiple connecting ears are also provided on the outer cylinder body 2 and the cylinder head seat 1 for bolt installation.

[0062] When the cylinder head seat 1 and the outer cylinder body 2 are connected by a threaded fixing structure, refer to Figure 5 As shown, specifically, the insertion part 11 of the cylinder head seat 1 is provided with an external thread, and the inner wall of the outer cylinder body 2 is provided with an internal thread that mates with the external thread. The fixed connection between the cylinder head seat 1 and the outer cylinder body 2 is completed through the mating of the internal and external threads.

[0063] This utility model also provides a cylinder, including the above-mentioned split cylinder body.

[0064] By adopting a split cylinder block design, the problems of high casting difficulty and poor casting precision caused by the complex structure of the cylinder head seat can be avoided.

[0065] This utility model also provides a power supply device, including a striker assembly 7 and the aforementioned split cylinder body. The striker assembly 7 is slidably disposed inside the outer cylinder body 2, and the cylinder head seat 1 is provided with an avoidance hole for the striker assembly 7 to pass through.

[0066] Optionally, the firing pin assembly 7 is located inside the outer cylinder 2 and is used to strike the nail to complete the nail firing. Correspondingly, the cylinder head seat 1 is provided with a clearance hole to provide a structural foundation for the firing pin assembly 7 to strike the nail.

[0067] This utility model also provides a nail gun, including the above-mentioned power supply device.

[0068] Optionally, the nail gun may also include a power supply device, wherein the inner cylinder 3 is located inside the outer cylinder 2, and the firing pin assembly 7 is located inside the inner cylinder 3. Correspondingly, the inner cylinder 3 is provided with a space for the firing pin assembly 7 to move and a through hole for the transfer assembly to pass through, thereby ensuring that the firing pin assembly 7 can slide freely inside the inner cylinder 3.

[0069] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A split-type cylinder block, characterized in that, include: Cylinder head seat (1); An outer cylinder body (2) has an opening (21) at one end; The cylinder head seat (1) and the outer cylinder body (2) are separately arranged, and the cylinder head seat (1) is fixedly assembled at the opening (21) of the outer cylinder body (2).

2. A split-type cylinder block according to claim 1, characterized in that, The outer cylinder body (2) is integrally formed by stretching profiles.

3. A split-type cylinder block according to claim 1 or 2, characterized in that, Also includes: Inner cylinder (3), the inner cylinder (3) is located inside the outer cylinder (2); A sleeve (4) is fitted onto the inner cylinder body (3), and the sleeve (4) is sealed and fitted to the inner cylinder body (3); The outer wall of the bushing (4) is sealed and fitted to the inner wall of the outer cylinder (2).

4. A split-type cylinder block according to claim 3, characterized in that, A first sealing element (5) is provided between the inner wall of the insert (4) and the outer wall of the inner cylinder (3), and the first sealing element (5) is used to seal the gap between the insert (4) and the inner cylinder (3).

5. A split-type cylinder block according to claim 3, characterized in that, A second sealing element (6) is provided between the inner wall of the outer cylinder (2) and the outer wall of the bushing (4), and the second sealing element (6) is used to seal the gap between the outer cylinder (2) and the bushing (4).

6. A split-type cylinder block according to claim 1 or 2, characterized in that, The cylinder head seat (1) includes an insertion part (11) that is inserted into the opening (21) and an exposed part (12) that abuts against the end face of the outer cylinder body (2).

7. A split-type cylinder block according to claim 1 or 2, characterized in that, The cylinder head seat (1) and the outer cylinder body (2) are fixedly connected by bolts, or the cylinder head seat (1) and the outer cylinder body (2) are fixed by threads.

8. A cylinder, characterized in that, Includes the split cylinder block as described in any one of claims 1-7.

9. A power supply device, characterized in that, include: Firing pin assembly (7); The cylinder body according to claim 8, wherein the striker assembly (7) is slidably disposed inside the outer cylinder body (2), and the cylinder head seat (1) is provided with a clearance hole for the striker assembly (7) to pass through.

10. A nail gun, characterized in that, Includes the power supply device as described in claim 9.

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