Dustproof structure of breaking hammer

Abstract

The utility model belongs to the technical field of breaking hammers, and particularly relates to a dustproof structure of a breaking hammer. The breaking hammer solves the problems that an existing breaking hammer is prone to black oil, and the service life of hydraulic oil is short. According to the dustproof structure of the breaking hammer, the breaking hammer comprises a front cylinder body and a drill rod, the front cylinder body is provided with a channel allowing the drill rod to penetrate through and stretch into the channel, and the dustproof structure of the breaking hammer is characterized by comprising a dustproof boss which is located on the peripheral wall of the drill rod and arranged in a protruding mode in the radial direction; the projection of the channel in the axis direction of the drill rod is located on the inner side of the outer edge of the dustproof boss, and the dustproof boss is provided with a guide structure capable of guiding and dispersing dust towards the outer side. Dust is prevented from impacting the outer sleeve, the black oil phenomenon is reduced, and the service life of hydraulic oil is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of breaking hammer, concretely relates to a dustproof structure of breaking hammer. BACKGROUND

[0002] When the hydraulic breaking hammer is working, the rock dust on the tip of the drill rod will be stirred up by the collision between the drill rod and the rock, and will impact the lower end face of the front cylinder body. The dust will enter the inside of the front cylinder body through the contact gap between the front cylinder body and the drill rod, and some of the dust will enter the middle cylinder body through the front cylinder body, polluting the hydraulic oil and causing the black oil phenomenon, which affects the normal work of the hydraulic breaking hammer.

[0003] For example, the utility model discloses a kind of water mist dustproof devices of breaking hammer, and the water mist dustproof device is located in the lower part of breaking hammer main body, and when breaking operation, the device is equipped with spray head, and when breaking operation, the water that is sprayed by the spray head of this dustproof device forms water mist around the operation point of breaking hammer drill rod, thereby achieving dustproof effect.

[0004] But the above-mentioned water mist dustproof device needs to be set on excavator Additional water tank or need to be connected with additional water pipe, the structure is more complex, increase the load of excavator, and also consume a large amount of water resources in actual use. SUMMARY

[0005] The utility model aims at the above-mentioned problems existing in prior art, and provides a kind of dustproof structure of breaking hammer, and the technical problems to be solved by the utility model are: how to prevent dust impact outer cover, reduce the occurrence of black oil phenomenon, increase the service life of hydraulic oil.

[0006] The utility model can be realized by the following technical schemes:

[0007] A kind of dustproof structure of breaking hammer, breaking hammer includes front cylinder body and drill rod, the channel that the drill rod passes through and extends inside is formed on the front cylinder body, and the dustproof structure of breaking hammer includes the dustproof boss that is set along radial direction on the outer peripheral wall of drill rod, the projection of the channel along drill rod axis direction is located in the outer edge of dustproof boss inner side, and the guide structure that can guide dust to outside is arranged on the dustproof boss.

[0008] Dustproof boss is arranged on drill rod, the projection of the channel along drill rod axis direction is located in the outer edge of dustproof boss inner side, when breaking hammer works, dust is usually generated at the bottom end of drill rod, dustproof boss can prevent dust from directly impacting the channel, the guide structure on dustproof boss can guide dust to outside, further prevent dust from entering the channel, prevent dust from impacting front cylinder body, reduce the occurrence of black oil phenomenon, increase the service life of hydraulic oil.

[0009] In the dustproof structure of the breaking hammer, the dustproof boss comprises an upper platform body and a lower platform body, the outer surface of the lower platform body comprises a guide conical surface one towards the bottom end of the drill rod, and the bottom end diameter of the guide conical surface one is smaller than the top end diameter.

[0010] In the dustproof structure of the breaking hammer, the dustproof boss comprises an upper platform body and a lower platform body, the outer surface of the lower platform body comprises a guide conical surface one towards the bottom end of the drill rod, and the bottom end diameter of the guide conical surface one is smaller than the top end diameter.

[0011] In the dustproof structure of the breaking hammer, the outer surface of the lower platform body further comprises a guide conical surface two towards the bottom end of the drill rod, the guide conical surface two is located between the guide conical surface one and the upper platform body, the bottom end diameter of the guide conical surface two is smaller than the top end diameter, and the included angle between the guide conical surface one and the guide conical surface two is obtuse.

[0012] In the dustproof structure of the breaking hammer, the lower platform body further comprises a concave guide arc surface two, which is located between the guide conical surface one and the upper platform body.

[0013] In the dustproof structure of the breaking hammer, the diameter of the upper platform body is greater than or equal to the maximum diameter of the lower platform body.

[0014] In the dustproof structure of the breaking hammer, the height of the lower platform body is at least twice the height of the upper platform body.

[0015] In the dustproof structure of the breaking hammer, the upper platform body comprises a platform surface towards the front cylinder body, the drill rod is located in the front cylinder body and can reciprocate along the axis thereof, and when the drill rod moves towards the top to the maximum position, the platform surface has a spacing with the front cylinder body.

[0016] In the dustproof structure of the breaking hammer, the upper platform body further comprises a guide arc surface three above the platform surface, the guide arc surface three is concave, and the guide arc surface three is towards the front cylinder body.

[0017] Compared with the prior art, the dustproof structure of the breaking hammer has the following advantages:

[0018] 1. The projection of the upper passage of the front cylinder body along the axial direction of the drill rod is located inside the outer edge of the dustproof boss, which can effectively prevent dust from directly impacting the passage during the reciprocating movement of the drill rod.

[0019] 2. The drill rod is provided with a boss, and through the guide structure on the boss, air flows along the guide structure during the reciprocating movement of the drill rod, thereby guiding dust to the outside of the drill rod, preventing dust from entering the front cylinder body to cause black oil phenomenon, and increasing the service life of hydraulic oil.

[0020] 3, the arc surface three on the drill rod, under the reciprocating movement of the drill rod, the space between the table and the front cylinder is extruded to produce, resulting in increased pressure, airflow will act on the guide arc surface three to promote the dust on the table to be discharged to the outside of the drill rod. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a cross-sectional view of the drill rod in the front cylinder in example one.

[0022] Figure 2 is a three-dimensional structure schematic diagram of the drill rod in example one.

[0023] Figure 3 is a schematic diagram of the drill rod in example two.

[0024] Figure 4 is a schematic diagram of the drill rod in example three.

[0025] In the figure, 1, the front cylinder; 1a, the channel; 1b, the inner sleeve; 1c, the outer sleeve; 1d, the body; 2, the drill rod; 2a, the guide arc surface three; 3, the dustproof boss; 4, the upper table body; 4a, the table; 5, the lower table body; 5a, the guide arc surface one; 5b, the guide conical surface one; 5c, the guide conical surface two; 5d, the guide arc surface two. DETAILED DESCRIPTION

[0026] The following is a specific embodiment of the present application and further describes the technical scheme of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0027] Example one

[0028] As shown in Figure 1 and Figure 2 , the breaking hammer in the embodiment includes a front cylinder 1 and a drill rod 2, the front cylinder 1 has a channel 1a for the drill rod 2 to enter the inside, the drill rod 2 can reciprocate in the front cylinder 1, the dustproof structure of the breaking hammer includes a dustproof boss 3 radially protruding on the outer peripheral wall of the drill rod 2, the projection of the channel 1a along the axis direction of the drill rod 2 is located inside the outer edge of the dustproof boss 3, the projection of the channel 1a along the axis direction of the drill rod 2 is located inside the outer edge of the dustproof boss 3, when the breaking hammer works, dust is usually generated at the bottom end of the drill rod 2, the dustproof boss 3 can prevent the dust from directly rushing into the channel 1a, the dustproof boss 3 is provided with a guide structure capable of guiding and dispersing the dust outward, the guide structure can guide the dust outward, further preventing the dust from entering the channel 1a, preventing the dust from impacting the front cylinder 1, reducing the occurrence of black oil phenomenon, and increasing the service life of hydraulic oil.

[0029] Further, as shown in Figure 1As shown, the front cylinder body 1 includes a body 1d, an inner sleeve 1b and an outer sleeve 1c, the inner sleeve 1b is located inside the front cylinder body 1, the outer sleeve 1c is located at the bottom end of the front cylinder body 1, the body 1d has a space inside which can accommodate the drill rod 2, at least part of the outer sleeve 1c is located outside the body 1d, the passage 1a in this embodiment can refer to the port of the outer sleeve 1c. In other breaking hammers, the outer sleeve 1c can not be contained or other components can be used to define the space inside the body 1d for the drill rod 2 to enter, and the passage 1a thereof defines the opening at the lowermost end of the front cylinder body 1.

[0030] Further, as shown in Figure 1 and Figure 2 , the dust prevention boss 3 includes an upper platform body 4 and a lower platform body 5, the lower platform body 5 includes a guide arc surface 1 5a towards the bottom end of the drill rod 2, which belongs to the guide structure. The guide arc surface 1 5a is concave, the diameter of the bottom end of the guide arc surface 1 5a is smaller than that of the top end, and the diameter of the guide arc surface 1 5a gradually increases from bottom to top along the axial direction of the drill rod 2. The setting of the guide arc surface 1 5a can further promote the dust on the platform 4a to be blown off when the dust comes up along the drill rod 2 and reaches the guide arc surface 1 5a, which will be dispersed around along the guide arc surface 1 5a, avoiding the dust directly impacting the front cylinder body 1, especially impacting the passage 1a, thereby achieving the effect of dust prevention.

[0031] Further, as shown in Figure 1 and Figure 2 , the diameter of the upper platform body 4 is greater than or equal to the maximum diameter of the lower platform body 5, and the relationship between the maximum diameters of the platform body and the lower platform body 5 prevents the dust from gathering again after being guided by the lower platform body 5. The height of the lower platform body 5 is at least twice the height of the upper platform body 4. The height of the upper and lower platform bodies 5 is at least twice the height of the upper platform body 4, and the dust guide path of the lower platform body 5 is large, which can better prevent the dust from impacting the passage 1a of the front cylinder body 1.

[0032] Further, as shown in Figure 1 , the upper platform body 4 includes a platform 4a towards the front cylinder body 1, the drill rod 2 located inside the front cylinder body 1 can reciprocate along its axial line, when the drill rod 2 moves towards the top to the maximum position, the platform 4a has a spacing with the front cylinder body 1, thereby preventing the dust prevention boss 3 from colliding with the front cylinder body 1. When the drill rod 2 reciprocates, the spacing between the platform 4a and the front cylinder body 1 changes, the space between the platform 4a and the front cylinder body 1 is extruded, resulting in an increase in pressure, which promotes the dust scattered on the platform 4a to be blown off. There is also a guide arc surface 3 2a above the upper platform body 4 which is connected with the platform 4a, the guide arc surface 3 2a is concave, and the guide arc surface 3 2a is towards the front cylinder body 1. The setting of the guide arc surface 3 2a can further promote the dust on the platform 4a to be blown off.

[0033] Embodiment two

[0034] The embodiment is substantially same as the above-mentioned embodiments, and the difference is that, as shown in Figure 3 The guiding structure in the embodiment is slightly different from that in the first embodiment, the outer surface of the lower base body 5 comprises a guiding conical surface 5b towards the bottom end of the drill rod 2, the diameter of the bottom end of the guiding conical surface 5b is smaller than that of the top end, the outer surface of the lower base body 5 further comprises a guiding conical surface 5c towards the bottom end of the drill rod 2, the guiding conical surface 5c is located between the guiding conical surface 5b and the upper base body 4, the diameter of the bottom end of the guiding conical surface 5c is smaller than that of the top end, and the included angle between the guiding conical surface 5b and the guiding conical surface 5c is obtuse.

[0035] In the embodiment, the guiding conical surface 5b and the guiding conical surface 5c are used to guide the dust, the included angle between the guiding conical surface 5b and the guiding conical surface 5c can increase the contact area with the air when the drill rod 2 moves downward, increase the air flow speed on the guiding conical surface 5c, and thus increase the moving speed of the dust to the outside.

[0036] Embodiment three

[0037] The embodiment is substantially same as the second embodiment, and the difference is that, as shown in Figure 4 The lower base body 5 further comprises a guiding arc surface 5d arranged in a concave manner, and the guiding arc surface 5d is located between the guiding conical surface 5b and the upper base body 4.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A dustproof structure of a breaking hammer including a front cylinder (1) having a passage (la) through which a drill rod (2) passes and protrudes into the inside, and the drill rod (2), characterized in that, The dustproof structure of the breaking hammer comprises a dustproof boss (3) radially protruding on the outer wall of the drill rod (2), the projection of the channel (1a) along the axis of the drill rod (2) is located inside the outer edge of the dustproof boss (3), and the dustproof boss (3) is provided with a guide structure capable of guiding and dispersing dust outward.

2. The dust-proof structure of a breaking hammer according to claim 1, characterized by The dustproof boss (3) comprises an upper boss body (4) and a lower boss body (5), the lower boss body (5) comprises a guide arc surface I (5a) towards the bottom end of the drill rod (2), the guide arc surface I (5a) is concave, the diameter of the bottom end of the guide arc surface I (5a) is smaller than that of the top end, and the diameter of the guide arc surface I (5a) gradually increases from bottom to top along the axial direction of the drill rod (2).

3. The dust-proof structure of a breaking hammer according to claim 1, characterized by The dustproof boss (3) comprises an upper boss body (4) and a lower boss body (5), the outer surface of the lower boss body (5) comprises a guide conical surface I (5b) towards the bottom end of the drill rod (2), and the diameter of the bottom end of the guide conical surface I (5b) is smaller than that of the top end.

4. The dust-proof structure of a breaking hammer according to claim 3, characterized in that, The outer surface of the lower boss body (5) further comprises a guide conical surface II (5c) towards the bottom end of the drill rod (2), the guide conical surface II (5c) is located between the guide conical surface I (5b) and the upper boss body (4), the diameter of the bottom end of the guide conical surface II (5c) is smaller than that of the top end, and the included angle between the guide conical surface I (5b) and the guide conical surface II (5c) is obtuse.

5. The dust-proof structure of a breaking hammer according to claim 4, characterized in that, The lower boss body (5) further comprises a concave guide arc surface II (5d), which is located between the guide conical surface I (5b) and the upper boss body (4).

6. The dust-proof structure of a breaking hammer according to claim 2 or 3 or 4 or 5, characterized in that, The diameter of the upper boss body (4) is greater than or equal to the maximum diameter of the lower boss body (5).

7. The dust-proof structure of a breaking hammer according to claim 2 or 3 or 4 or 5, characterized in that, The height of the lower boss body (5) is at least twice the height of the upper boss body (4).

8. The dust-proof structure of a breaking hammer according to claim 2 or 3 or 4 or 5, characterized in that, The upper boss body (4) comprises a table surface (4a) towards the front cylinder body (1), the drill rod (2) is located in the front cylinder body (1) and can reciprocate along the axis thereof, and when the drill rod (2) moves to the maximum position towards the top, the table surface (4a) has a spacing with the front cylinder body (1).

9. The dust-proof structure of a breaking hammer according to claim 8, characterized by The upper boss body (4) further comprises a guide arc surface III (2a) above the table surface (4a), the guide arc surface III (2a) is concave, and the guide arc surface III (2a) is towards the front cylinder body (1).

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