Air hammer device with good sealing performance
By using a sealing gasket composed of flexible and rigid layers in the pneumatic hammer device, the problem of air leakage in the pneumatic hammer was solved, resulting in better sealing performance and extended service life.
Patent Information
- Application Number
- CN202520479513.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-18
AI Technical Summary
Existing pneumatic hammer devices are prone to leakage of high-pressure gas from the gap between the sealing surface and the metal joint during operation, resulting in air leakage and affecting the sealing effect.
The gasket features a cavity design, consisting of a flexible layer and a rigid layer. The flexible layer deforms under high pressure to make close contact with the air inlet, while the rigid layer provides support. Combined with an annular groove and a gasket, it stabilizes airflow and enhances sealing.
It improves the airtightness of the air hammer device, prevents air leakage, extends its service life, and maintains airflow stability.
Smart Images
Figure CN223779053U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to air hammer device technical field, more specifically it relates to a sealed air hammer device. BACKGROUND
[0002] At present, the pneumatic hammer is the advanced powder falling device at home and abroad. Its working principle is that compressed air is used as power to release the hammer head inside instantaneously to strike the bottom, and the strong impact force is transmitted to the hopper wall surface, effectively breaking the arch bridge formed by the material, loosening the accumulated material, and achieving the purpose of smooth unloading. It is used to automatically prevent the adhesion, blockage and bridging of powder in the pipeline, hopper and silo during conveying, and is widely used in powder processing industries such as chemical industry, food, cement, pharmaceutical and plastic.
[0003] However, the existing technology still has some defects. The existing air hammer is directly connected with the air pump interface through threads, and the instantaneous air pressure in the cavity during the operation of the air hammer is much higher than that of the pneumatic tool. High-pressure gas is easy to leak from the gap between the sealing surface and the metal joint, resulting in air leakage. UTILITY MODEL CONTENTS
[0004] In view of the deficiencies of the prior art, the utility model provides a sealed air hammer device.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: including air hammer body, the air hammer body includes upper cover, air hammer outer cover, the air hammer outer cover is provided with the air hammer inner chamber that passes through, the air hammer inner chamber is provided with the corresponding hammer core, the hammer core is provided with the compression spring for reset, the compression spring is close to the hammer core, the upper cover is provided with the air inlet that links to the air hammer inner chamber, the air hammer outer cover is provided with the air outlet for balancing the air pressure of the air hammer inner chamber, the air outlet is close to the lower part of the air hammer shell, the air hammer inner chamber is provided with the sealing gasket with cavity, the sealing gasket is close to the air inlet.
[0006] The utility model is further provided as follows: the sealing gasket is provided with fixed protrusion, and the upper cover is provided with the corresponding recess.
[0007] The utility model is further provided as follows: the sealing gasket includes flexible layer, hard layer, the hard layer is arranged on the upper layer and lower layer of sealing gasket, and the flexible layer is arranged in the middle layer of sealing gasket.
[0008] The utility model is further provided as follows: the cavity is arranged in the flexible layer.
[0009] The utility model is further provided as follows: the air hammer inner chamber is provided with the gasket plate corresponding to the air hammer outer cover, and the gasket plate is close to the upper cover.
[0010] The utility model is further provided as follows: the hammer core is provided with a plurality of annular grooves.
[0011] In summary, the present invention has the following beneficial effects: by setting a sealing gasket with a cavity, when the present invention is working, the air pressure in the inner cavity of the air hammer increases and the sealing gasket is compressed. The compressed sealing gasket will deform and come into close contact with the air inlet, forming a good sealing surface. Moreover, as the air pressure increases, a better sealing effect can be obtained, so that the present invention can obtain better airtightness and avoid air leakage. Attached Figure Description
[0012] Fig. 1 This is a schematic diagram of the structure of this embodiment;
[0013] Fig. 2 This is a cross-sectional view of this embodiment;
[0014] Fig. 3 This is a schematic diagram of the sealing gasket structure in this embodiment;
[0015] Reference numerals in the attached drawings: 1. Air hammer body; 2. Top cover; 21. Air inlet; 22. Cavity; 3. Air hammer outer sleeve; 31. Air hammer inner cavity; 32. Air outlet; 4. Hammer core; 41. Annular groove; 42. Compression spring; 43. Pad; 5. Sealing gasket; 51. Fixing protrusion; 52. Flexible layer; 53. Hard layer; 54. Cavity. Detailed Implementation
[0016] The present invention will be further described in detail below with reference to the accompanying drawings.
[0017] This embodiment discloses a well-sealed pneumatic hammer device, such as... Figs. 1-2 As shown, the device includes a pneumatic hammer body 1, which includes an upper cover 2 and a pneumatic hammer outer sleeve 3. The pneumatic hammer outer sleeve 3 has a through-hole pneumatic hammer cavity 31. The pneumatic hammer cavity 31 has a corresponding hammer core 4. The hammer core 4 is pushed by the air pressure when the pressure in the pneumatic hammer cavity 31 increases. The hammer core 4 has a compression spring 42 for resetting. The compression spring 42 is close to the hammer core 4. When the hammer core 4 moves, the compression spring 42 is compressed. The elastic force generated by the compression spring 42 acts on the hammer core 4. When the air pressure thrust decreases, the elastic force generated by the compression spring 42 will push the pushed-out hammer core 4 back to its original position. The upper cover 2 has an air inlet 21 that connects to the pneumatic hammer cavity 31. The pneumatic hammer outer sleeve 3 has an air outlet 32 for balancing the air pressure in the pneumatic hammer cavity 31. The air outlet 32 is close to the lower part of the pneumatic hammer outer sleeve. The pneumatic hammer cavity 31 has a sealing gasket 5 with a cavity 54. The sealing gasket 5 is close to the air inlet 21.
[0018] To further improve the design, the sealing gasket 5 is provided with a fixing protrusion 51, and the upper cover 2 is provided with a corresponding recess 22. The cooperation between the fixing protrusion 51 and the recess 22 allows the sealing gasket 5 to be easily and stably mounted on the upper cover 2, preventing movement or deflection that could damage the sealing surface.
[0019] As Fig. 3 The sealing gasket 5 includes a flexible layer 52 and a hard layer 53, the hard layer 53 is arranged on the upper and lower layers of the sealing gasket 5, and the flexible layer 52 is arranged in the middle layer of the sealing gasket 5. The hard layer 53 is made of hard plastic, and the hard layer 53 is arranged to provide support for the sealing gasket 5 and maintain the shape of the sealing gasket 5, so that the sealing gasket 5 does not deviate under pressure. The flexible layer 52 is made of flexible rubber and is easy to deform under pressure. When the sealing gasket 5 is subjected to air pressure, the hard layer 53 is pressed to push the flexible layer 52 to deform, and the deformed flexible layer 52 contacts and tightly abuts the adjacent air inlet 21 to form a good sealing surface. The deformation of the flexible layer 52 increases with the increase of the pressure, and the sealing effect of the sealing gasket 5 increases with the increase of the pressure.
[0020] Further improvement, the cavity 54 is arranged in the flexible layer 52. The arrangement of the cavity increases the deformation amount of the flexible layer 52 under pressure, so that the pressure in the air hammer inner cavity 31 can more easily push the sealing gasket 5 to deform the flexible layer 52, so that the sealing gasket 5 is more closely contacted with the air inlet 21, and the sealing gasket 5 obtains better sealing effect.
[0021] Further improvement, the air hammer inner cavity 31 is provided with a pad plate 43 matched with the air hammer outer sleeve 3, and the pad plate 43 is close to the upper cover 2. The pad plate 43 provides a more flat contact surface when the hammer core 4 is reset. When the hammer core 4 is reset by the elastic force of the compression spring 42, the movement end will impact the air hammer inner cavity 31. The pad plate 43 makes the force distribution more uniform when the hammer core 4 impacts, avoiding the hammer core 4 directly impacting the air hammer inner cavity 31 when reset by the spring force, and increasing the service life of the hammer core 4 and the air hammer outer sleeve 3.
[0022] Further improvement, the hammer core 4 is provided with a plurality of annular grooves 41. The annular grooves 41 are air flow adjusting channels, and compressed air drives the piston or impact component to vibrate through the channel in the hammer core 4. The annular grooves have the same effect as the air flow distributor, which adjusts the air flow direction and pressure distribution to ensure that the air pressure of the hammer core 4 is stable during high-speed reciprocating motion, and avoids air flow disorder to cause vibration efficiency to decrease.
[0023] The working principle of the utility model
[0024] The utility model uses, the air inlet 21 connects air pump interface, air pump interface will input airflow to air hammer inner chamber 31, the air pressure of air hammer inner chamber 31 upper part will rapidly rise, the air pressure of rising will press to hammer core 4 and gasket 5, hammer core 4 will be under the push of pressure and move downward, gasket 5 will be under the push of pressure and extrude and change shape upward, the sealing layer will be tightly attached to air inlet 21 and obtain good sealing effect, when the air pressure reduces, the compression spring 42 will push hammer core 4 and reset, the hammer core 4 of resetting will hit the backing plate 43 in the movement end, the backing plate 43 will reduce the impact that hammer core 4 receives and increase the service life.
[0025] The above only is the preferred embodiment of the utility model, and is not used for limiting the utility model, and any modification, equivalent replacement, improvement etc. that is made within the design concept of the utility model should be contained in the protection scope of the utility model.
Claims
1. A sealed air hammer device comprising an air hammer body (1), characterized by: The pneumatic hammer body (1) comprises an upper cover (2) and a pneumatic hammer jacket (3), the pneumatic hammer jacket (3) is provided with a through pneumatic hammer inner cavity (31), the pneumatic hammer inner cavity (31) is provided with a corresponding hammer core (4), the hammer core (4) is provided with a compression spring (42) for resetting, the compression spring (42) is close to the hammer core (4), the upper cover (2) is provided with an air inlet (21) communicating with the pneumatic hammer inner cavity (31), the pneumatic hammer jacket (3) is provided with an air outlet (32) for balancing the air pressure of the pneumatic hammer inner cavity (31), the air outlet (32) is close to the lower part of the pneumatic hammer jacket, the pneumatic hammer inner cavity (31) is provided with a sealing gasket (5) with a cavity (54), and the sealing gasket (5) is close to the air inlet (21).
2. A sealed air hammer device as defined in claim 1, wherein: The sealing gasket (5) is provided with a fixing protrusion (51), and the upper cover (2) is provided with a corresponding recess (22).
3. The sealed air hammer device of claim 1, wherein: The sealing gasket (5) comprises a flexible layer (52) and a hard layer (53), the hard layer (53) is arranged on the upper and lower layers of the sealing gasket (5), and the flexible layer (52) is arranged on the middle layer of the sealing gasket (5).
4. The sealed air hammer device of claim 2, wherein: The cavity (54) is arranged on the flexible layer (52).
5. The sealed air hammer device of claim 1, wherein: The pneumatic hammer inner cavity (31) is provided with a gasket plate (43) corresponding to the pneumatic hammer jacket (3), and the gasket plate (43) is close to the upper cover (2).
6. The sealed air hammer device of claim 1, wherein: The hammer core (4) is provided with a plurality of annular grooves (41).