Air cylinder structure convenient to exhaust and hammer drill adopting air cylinder structure

Abstract

The air cylinder structure convenient to exhaust comprises a cylinder body, a piston cavity is formed in the cylinder body, and a connecting hole is formed in one end of the cylinder body; an exhaust groove is formed in the outer side of the cylinder body and communicated to the end of the cylinder body, and a main exhaust hole communicated with the piston cavity is formed in the exhaust groove. A brand new exhaust structure design is adopted on the cylinder body, the exhaust effect of the air cylinder can be guaranteed when the hammer drill operates at high frequency through the designed exhaust groove and the matched exhaust hole, exhaust can be well guaranteed when the impact piston mechanism does reciprocating motion, and then the service life of parts of the impact piston mechanism is prolonged. And meanwhile, one end of the exhaust groove is communicated to the connecting hole, the cylinder body is in swing connection with a transmission structure of the driving motor through the connecting hole, exhaust gas in the exhaust groove is communicated to the connecting hole, heat dissipation can be conducted on rotating connection, and then the service life between the parts is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hammer drills, in particular to a cylinder structure convenient for exhausting air and a hammer drill adopting the structure. Background Art

[0002] Hammer drill is an impact tool we commonly use. An impact piston mechanism is provided inside the hammer drill. The impact piston mechanism is connected to the driving motor through transmission. The driving motor drives the impact piston mechanism to reciprocate through the crankshaft eccentric pin assembly.

[0003] The reciprocating motion of the impact piston mechanism is actually the relative motion between the cylinder and the piston, and the work is carried out by generating air pressure thrust through the relative motion between the cylinder and the piston. Therefore, a structure is generally provided on the cylinder to ensure normal operation. The existing exhaust structure is usually a simple exhaust hole provided on the cylinder, but the existing structural method has a poor exhaust effect. When the hammer drill moves relative to each other at a high frequency, a good exhaust effect cannot be guaranteed, which reduces the life of the impact piston mechanism components. Therefore, technical improvements are needed to address the defects of the existing structure. Summary of the invention

[0004] The purpose of the utility model is to solve the problems raised in the above background technology and to provide a cylinder structure which is convenient for exhausting gas and a hammer drill adopting the structure.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a cylinder structure that is convenient for exhaust, including a cylinder body, a piston chamber is provided in the cylinder body, and a connecting hole is provided at one end of the cylinder body; an exhaust groove is provided on the outside of the cylinder body, the exhaust groove leads to the end of the cylinder body, and a main exhaust hole communicating with the piston chamber is provided in the exhaust groove.

[0006] In the above-mentioned cylinder structure for facilitating exhaust, the other end of the exhaust groove leads to the connecting hole.

[0007] In the above-mentioned cylinder structure for facilitating exhaust, the cross section of the exhaust groove is designed to be semi-elliptical, and the main exhaust hole is located at the center bottom of the exhaust groove.

[0008] In the above-mentioned cylinder structure that facilitates exhaust, the center point of the main exhaust hole is located on the center line of the bottom of the exhaust groove.

[0009] In the above-mentioned cylinder structure that is convenient for exhausting, an auxiliary exhaust hole is further provided in the exhaust groove, and the center point of the auxiliary exhaust hole is also located on the center line of the bottom of the exhaust groove and on the same straight line as the center point of the main exhaust hole.

[0010] In the above-mentioned cylinder structure that facilitates exhaust, the distance L1 from the central axis of the auxiliary exhaust hole to the bottom of the piston chamber is equal to the distance L2 from the central axis of the main exhaust hole to the end of the cylinder body.

[0011] A hammer drill comprises the above-mentioned cylinder structure.

[0012] The utility model has the following beneficial effects:

[0013] The utility model adopts a brand-new exhaust structure design on the cylinder body. Through the designed exhaust groove and the exhaust hole designed in combination, the exhaust effect of the cylinder can be guaranteed when the hammer drill runs at a high frequency, and the exhaust when the impact piston mechanism makes a reciprocating motion can be well guaranteed, thereby prolonging the life of the impact piston mechanism components.

[0014] At the same time, one end of the exhaust groove leads to the connecting hole, and the cylinder body is swingably connected to the transmission structure of the drive motor through the connecting hole. The exhaust gas in the exhaust groove passes to the connecting hole to dissipate the heat of the rotating connection, thereby further improving the service life of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional structural diagram of the utility model;

[0016] Figure 2 It is a planar structural diagram of the utility model. DETAILED DESCRIPTION

[0017] The utility model is further described in conjunction with the accompanying drawings.

[0018] See also Figure 1 , Figure 2 The utility model provides a cylinder structure that is convenient for exhausting, including a cylinder body 1, a piston chamber 2 is arranged in the cylinder body 1, and a connecting hole 3 is arranged at one end of the cylinder body 1; an exhaust groove 4 is arranged on the outside of the cylinder body 1, and the exhaust groove 4 leads to the end of the cylinder body 1, and a main exhaust hole 5 communicating with the piston chamber 2 is arranged in the exhaust groove 4.

[0019] The exhaust in the cylinder 1 can be exhausted quickly through the design of the exhaust groove 4 and the main exhaust hole 5, so that the exhaust effect of the cylinder can be guaranteed when the hammer drill is running at a high frequency, and the exhaust when the impact piston mechanism is reciprocating can be well guaranteed, thereby prolonging the life of the impact piston mechanism components.

[0020] Furthermore, the other end of the exhaust groove 4 leads to the connecting hole 3, and the cylinder body 1 is swingably connected to the transmission structure of the driving motor through the connecting hole 3. The exhaust gas in the exhaust groove 4 passes through the connecting hole 3 to dissipate the heat of the rotating connection, thereby further improving the service life of the components.

[0021] Furthermore, in order to ensure the exhaust gas discharge effect, the cross-section of the exhaust groove 4 is designed to be semi-elliptical, the main exhaust hole 5 is located at the center bottom of the exhaust groove 4, and the center point of the main exhaust hole 5 is located on the center line of the bottom of the exhaust groove 4.

[0022] Furthermore, an auxiliary exhaust hole 6 is also provided in the exhaust groove 4, and the center point of the auxiliary exhaust hole 6 is also located on the center line of the bottom of the exhaust groove 4 and on the same straight line as the center point of the main exhaust hole 5; the auxiliary exhaust hole 6 is provided in conjunction with the exhaust groove and the main exhaust hole 5 to better ensure the exhaust effect.

[0023] Furthermore, the distance L1 from the central axis of the auxiliary exhaust hole 6 to the bottom of the piston chamber 2 is equal to the distance L2 from the central axis of the main exhaust hole 5 to the end of the cylinder body (1).

[0024] The utility model also provides a hammer drill which adopts the above-mentioned cylinder structure.

[0025] The above is a detailed introduction to a cylinder structure that is convenient for exhaust and a hammer drill using the same provided in an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the technical solution disclosed by the utility model. At the same time, for a person skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation of the utility model.

Claims

1. A cylinder structure for facilitating exhaust, comprising a cylinder body (1), a piston chamber (2) being provided in the cylinder body (1), and a connecting hole (3) being provided at one end of the cylinder body (1); the characteristics are as follows: An exhaust groove (4) is provided on the outside of the cylinder body (1), the exhaust groove (4) leads to the end of the cylinder body (1), and a main exhaust hole (5) communicating with the piston chamber (2) is provided in the exhaust groove (4).

2. A cylinder structure for facilitating exhaust according to claim 1, characterized in that: The other end of the exhaust groove (4) leads to the connecting hole (3).

3. A cylinder structure for facilitating exhaust according to claim 1 or 2, characterized in that: The cross section of the exhaust groove (4) is designed to be semi-elliptical, and the main exhaust hole (5) is located at the center bottom of the exhaust groove (4).

4. A cylinder structure for facilitating exhaust according to claim 3, characterized in that: The center point of the main exhaust hole (5) is located on the center line of the bottom of the exhaust groove (4).

5. A cylinder structure for facilitating exhaust according to claim 4, characterized in that: The exhaust groove (4) is also provided with an auxiliary exhaust hole (6), the center point of the auxiliary exhaust hole (6) is also located on the center line of the bottom of the exhaust groove (4) and on the same straight line as the center point of the main exhaust hole (5).

6. A cylinder structure for facilitating exhaust according to claim 5, characterized in that: The distance L1 from the central axis of the auxiliary exhaust hole (6) to the bottom of the piston chamber (2) is equal to the distance L2 from the central axis of the main exhaust hole (5) to the end of the cylinder body (1).

7. A hammer drill, characterized in that: It comprises the cylinder structure described in any one of claims 1 to 6.

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