Multi-stage anti-fouling and anti-impurity protection structure for hydraulic breaking hammer

Abstract

The utility model discloses a multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaking hammer, and relates to the technical field of hydraulic breaking hammers. The hydraulic cylinder comprises a middle cylinder, a piston is inserted in the middle cylinder, a front cylinder is sleeved on the surface of the piston, and a front cylinder neck bush is arranged in the front cylinder. According to the structure, dust and metal chippings which are attached to the outer wall of the piston and then enter the middle cylinder of the breaking hammer can be reduced, the phenomenon of black oil caused by hydraulic oil pollution due to the fact that the dust and the metal chippings enter the middle cylinder and are mixed with hydraulic oil is avoided, and adverse effects of polluted hydraulic oil on an excavator hydraulic system are avoided; low-pressure hydraulic oil enters the second-stage dustproof mechanism, hydraulic oil flowing spirals are formed on the surface of the piston, impurities between the piston and the middle cylinder can be cleaned, the impurities are timely discharged into an oil return channel through a spiral oil channel, enter a main machine and are finally filtered through a filter, and piston strain caused by the fact that chippings are clamped in gaps is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic breaker hammers, in particular to a multi-stage anti-fouling and anti-impurity protection structure for hydraulic breaker hammers. Background Art

[0002] The high-pressure oil of the excavator enters the lower oil chamber of the hydraulic breaker piston, and the piston moves upward under the push of the high-pressure oil. When the piston moves upward to the reversing oil channel, the reversing oil channel is connected to the high-pressure oil, and the high-pressure oil is passed into the reversing oil chamber of the reversing valve. Under the pressure difference caused by the area difference, the valve core moves to the other side. After moving into place, the high-pressure hydraulic oil of the valve core enters the upper oil chamber of the piston. The upper and lower oil chambers of the piston are subjected to high pressure at the same time. Because the upper end area is larger than the lower end area, the upper and lower pressure differences caused by the upper and lower area differences are generated. The thrust generated by the high-pressure oil is downward, and together with the compressed nitrogen pressure and the weight of the piston, the piston is pushed downward quickly to hammer the drill rod to break the stone. When the piston hammers the drill rod, the reversing oil channel is connected to the return oil, the high pressure in the reversing oil chamber disappears, and the valve core moves back to reset. The valve core closes the passage between the high-pressure hydraulic oil and the upper oil chamber of the piston and connects the upper oil chamber of the piston to return oil. End a working process. The hydraulic oil returns to the excavator when the piston moves upward next time. In the approximate implementation scheme, a dust seal is set at the front section of the middle cylinder, and the dustproof effect is limited.

[0003] Therefore, the prior art has the following defects:

[0004] When the conventional breaker hammer without this structure is working, external dust and metal debris enter the inner cylinder of the breaker hammer, causing the piston to pull the cylinder and wear when it moves up and down in the cylinder. At the same time, dust and metal debris enter the inner cylinder and mix with the hydraulic oil, causing the hydraulic oil to be polluted and blackened. The polluted hydraulic oil will have adverse effects on the normal operation of the excavator, including but not limited to wear of the excavator hydraulic system, and scratches in severe cases. When the piston moves up and down in the cylinder, the impurities in the gap between the piston and the cylinder cannot be discharged in time, causing the piston to pull the cylinder.

[0005] For this purpose, a multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker is proposed. Utility Model Content

[0006] The purpose of the utility model is to solve the problems raised in the above background technology and provide a multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker.

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] A multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker comprises a middle cylinder, a piston is inserted into the middle cylinder, a front cylinder is sleeved on the surface of the piston, a front cylinder inner liner is arranged inside the front cylinder, a hammer drill rod is inserted into the front cylinder inner liner, a front cylinder dustproof ring is sleeved inside the front cylinder, and the piston and the front cylinder dustproof ring are inserted in an inserted manner, a secondary dustproof mechanism is arranged inside the middle cylinder, a primary dustproof mechanism is arranged inside the front cylinder, and the primary dustproof mechanism and the secondary dustproof mechanism are used to seal the piston.

[0009] Furthermore, the secondary dustproof mechanism includes a low-pressure oil return channel, a primary spiral groove, a secondary spiral groove and a low-pressure oil inlet channel. The primary spiral groove and the secondary spiral groove are arranged in the middle cylinder, the low-pressure oil return channel is opened on the surface of the middle cylinder, and the low-pressure oil inlet channel is opened on the surface of the middle cylinder.

[0010] Furthermore, the small-diameter lower section of the piston ring is a piston dust-proof section, and the piston dust-proof section is used to cooperate with the front cylinder dust-proof ring to prevent dust when the piston hammers.

[0011] Furthermore, the first-level dustproof mechanism includes a front cylinder sealing groove and a plurality of steps. The front cylinder is provided with a front cylinder sealing groove, and the front cylinder sealing groove is used to install a front cylinder dustproof ring. The front cylinder is provided with a plurality of steps, and the plurality of steps are used to change the rebound direction of the splashes when the splashes hit this area when the piston hammers the drill rod.

[0012] Furthermore, the front cylinder dust ring is used for sealing when the piston hammers the drill rod.

[0013] Furthermore, the piston and the inner part of the middle cylinder are plugged in, and the primary spiral groove and the secondary spiral groove are arranged corresponding to the surface of the piston.

[0014] The beneficial effects of the utility model are as follows:

[0015] The primary dustproof mechanism is used to change the rebound direction of the splashes when the splashes hit this area when the piston and the hammer drill rod are struck, so as to reduce the number of splashes flying to the lower cylindrical surface of the piston. The front cylinder dustproof ring can be in relatively closed contact with the piston when the piston strikes the hammer drill rod. The front cylinder dustproof ring and the piston contact ring are located before the contact section with the middle cylinder when the piston moves up and down, which can block the splashing metal debris, butter and external dust generated when the piston strikes the hammer drill rod from going up, and effectively prevent the splashing metal debris, butter and external dust from adhering to the outer wall of the piston and following into the middle cylinder of the breaker, so as to avoid dust and metal debris from entering the middle cylinder and mixing with the hydraulic oil to cause hydraulic oil pollution and black oil phenomenon, so as to avoid the adverse effects of polluted hydraulic oil on the normal operation of the excavator, and prevent the wear of the hydraulic system. The low-pressure hydraulic oil enters the secondary dustproof mechanism, and forms a hydraulic oil flow spiral on the piston surface, which can clean the impurities between the piston and the middle cylinder and discharge them into the return oil channel in time through the spiral oil channel to enter the main engine and finally filter through the filter, so as to avoid the piston strain caused by debris stuck in the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the front cylinder of the utility model;

[0017] Figure 2 It is a cross-sectional view of the cylinder of the utility model;

[0018] Figure 3 It is a cross-sectional view of the assembly of the utility model;

[0019] Figure numerals: 01, middle cylinder; 01-01, low-pressure oil return channel, 01-02, primary spiral groove; 01-03, secondary spiral groove; 01-04, low-pressure oil inlet channel; 02, piston; 02-01, piston dustproof section; 03, front cylinder; 0301, front cylinder dustproof ring; 03-01, front cylinder sealing groove; 0302, front cylinder inner sleeve; 03-02, multi-step steps; 04, hammer drill rod. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] like Figures 1 to 3As shown, a multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker includes a middle cylinder 01, a piston 02 is inserted into the middle cylinder 01, a front cylinder 03 is sleeved on the surface of the piston 02, a front cylinder inner sleeve 0302 is arranged inside the front cylinder 03, and a hammer drill rod 04 is inserted into the front cylinder inner sleeve 0302, a front cylinder dustproof ring 0301 is sleeved inside the front cylinder 03, and the piston 02 and the front cylinder dustproof ring 0301 are inserted in an arrangement, a secondary dustproof mechanism is arranged inside the middle cylinder 01, a primary dustproof mechanism is arranged inside the front cylinder 03, and the primary dustproof mechanism and the secondary dustproof mechanism are used to seal the piston 02. More specifically, the primary dustproof mechanism is used to change the rebound direction of the splashes when the splashes hit this area when the piston 02 strikes the drill rod 04, thereby reducing the amount of splashes flying to the lower cylindrical surface of the piston 02. The front cylinder dustproof ring 0301 can be in relatively closed contact with the piston 02 when the piston 02 strikes the drill rod 04. The front cylinder dustproof ring 0301 and the piston 02 contact ring are located before the contact section with the middle cylinder 01 when the piston 02 moves up and down, which can block the splashing metal debris, butter and external dust generated when the piston 02 strikes the drill rod 04 from going up, effectively preventing the splashing metal debris, butter and external dust from going up. External dust adheres to the outer wall of piston 02 and follows it into the middle cylinder 01 of the breaker, preventing dust and metal debris from entering the middle cylinder 01 and mixing with the hydraulic oil to cause hydraulic oil pollution and black oil phenomenon, avoiding the adverse effects of polluted hydraulic oil on the normal operation of the excavator and preventing hydraulic system wear. Low-pressure hydraulic oil enters the secondary dust prevention mechanism and forms a hydraulic oil flow spiral on the surface of piston 02, which can clean impurities between piston 02 and middle cylinder 01 and discharge them into the return oil channel in time through the spiral oil channel to enter the main engine and finally pass through the filter to avoid piston strain caused by debris stuck in the gap.

[0025] The secondary dust prevention mechanism includes a low-pressure oil return passage 01-01, a primary spiral groove 01-02, a secondary spiral groove 01-03 and a low-pressure oil inlet passage 01-04. The middle cylinder 01 is provided with a primary spiral groove 01-02 and a secondary spiral groove 01-03. The surface of the middle cylinder 01 is provided with a low-pressure oil return passage 01-01, and the surface of the middle cylinder 01 is provided with a low-pressure oil inlet passage 01-04. More specifically, the low-pressure hydraulic oil enters the primary spiral groove 01-02 and the secondary spiral groove 01-03 through the low-pressure oil inlet passage 01-04, and forms a hydraulic oil flow spiral on the surface of the piston 02, which can clean the impurities between the piston 02 and the middle cylinder 01 and discharge them into the main engine in time through the low-pressure oil return passage 01-01 and finally filter through the filter, thereby avoiding piston strain caused by debris stuck in the gap.

[0026] The piston 02 ring small diameter lower section is the piston dust section 02-01, which is used to cooperate with the front cylinder dust ring 0301 to prevent dust when the piston 02 is hammered. More specifically, the piston dust section 02-01 cooperates with the front cylinder dust ring 0301 to prevent dust when the piston 02 hammers the drill rod 04.

[0027] The primary dustproof mechanism includes a front cylinder sealing groove 03-01 and a multi-step step 03-02. The front cylinder 03 is provided with a front cylinder sealing groove 03-01, and the front cylinder sealing groove 03-01 is used to install a front cylinder dustproof ring 0301. The front cylinder 03 is provided with a multi-step step 03-02, and the multi-step step 03-02 is used to change the rebound direction of the splashes when the splashes hit this area when the piston 02 hammers the hammer drill rod 04. More specifically, the multi-step step 03-02 is used to change the rebound direction of the splashes when the splashes hit this area when the piston 02 hammers the hammer drill rod 04, thereby reducing the amount of splashes flying to the lower cylindrical surface of the piston 02.

[0028] The front cylinder dustproof ring 0301 is used for sealing when the piston 02 hammers the drill rod 04. More specifically, the front cylinder dustproof ring 0301 is used to prevent dust during hammering.

[0029] The piston 02 is internally plugged into the middle cylinder 01, and the primary spiral groove 01-02 and the secondary spiral groove 01-03 are arranged correspondingly to the surface of the piston 02. More specifically, the primary spiral groove 01-02 and the secondary spiral groove 01-03 are arranged correspondingly to the surface of the piston 02, thereby forming a hydraulic oil flow spiral on the surface of the piston 02.

[0030] In summary: the primary dustproof mechanism is used to change the rebound direction of the splashes when the splashes hit this area when the piston 02 and the hammer drill rod 04 hit this area, thereby reducing the number of splashes flying to the lower cylindrical surface of the piston 02. The front cylinder dustproof ring 0301 can be in relatively closed contact with the piston 02 when the piston 02 hits the hammer drill rod 04. The front cylinder dustproof ring 0301 and the piston 02 contact ring are located before the contact section with the middle cylinder 01 when the piston 02 moves up and down. It can block the splashing metal debris, butter and external dust generated when the piston 02 hits the hammer drill rod 04 from going up, effectively preventing the splashing metal debris, butter and external dust from going up. The dust adheres to the outer wall of the piston 02 and follows it into the middle cylinder 01 of the breaker, preventing dust and metal debris from entering the middle cylinder 01 and mixing with the hydraulic oil to cause hydraulic oil pollution and black oil phenomenon, avoiding the adverse effects of polluted hydraulic oil on the normal operation of the excavator and preventing hydraulic system wear. The low-pressure hydraulic oil enters the secondary dust prevention mechanism and forms a hydraulic oil flow spiral on the surface of the piston 02, which can clean the impurities between the piston 02 and the middle cylinder 01 and discharge them into the return oil channel in time through the spiral oil channel to enter the main engine and finally pass through the filter to avoid piston strain caused by debris stuck in the gap.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker, characterized in that: The utility model comprises a middle cylinder (01), wherein a piston (02) is inserted into the middle cylinder (01), a front cylinder (03) is sleeved on the surface of the piston (02), a front cylinder inner sleeve (0302) is arranged inside the front cylinder (03), and a hammer drill rod (04) is inserted into the front cylinder inner sleeve (0302), a front cylinder dustproof ring (0301) is sleeved inside the front cylinder (03), and the piston (02) and the front cylinder dustproof ring (0301) are inserted into each other, a secondary dustproof mechanism is arranged inside the middle cylinder (01), and a primary dustproof mechanism is arranged inside the front cylinder (03), and the primary dustproof mechanism and the secondary dustproof mechanism are used to seal the piston (02).

2. A multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker according to claim 1, characterized in that: The secondary dust prevention mechanism comprises a low-pressure oil return passage (01-01), a primary spiral groove (01-02), a secondary spiral groove (01-03) and a low-pressure oil inlet passage (01-04); the primary spiral groove (01-02) and the secondary spiral groove (01-03) are arranged in the middle cylinder (01); the low-pressure oil return passage (01-01) is opened on the surface of the middle cylinder (01); and the low-pressure oil inlet passage (01-04) is opened on the surface of the middle cylinder (01).

3. The multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker according to claim 1 is characterized in that: The piston (02) ring small diameter lower section is the piston dustproof section (02-01), and the piston dustproof section (02-01) is used to cooperate with the front cylinder dustproof ring (0301) to prevent dust when the piston (02) is hammered.

4. The multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker according to claim 1 is characterized in that: The primary dustproof mechanism comprises a front cylinder sealing groove (03-01) and a plurality of steps (03-02); the front cylinder (03) is provided with a front cylinder sealing groove (03-01), and the front cylinder sealing groove (03-01) is used for installing a front cylinder dustproof ring (0301); the front cylinder (03) is provided with a plurality of steps (03-02), and the plurality of steps (03-02) are used for changing the rebound direction of splashes when splashes hit this area when the piston (02) hammers the drill rod (04).

5. The multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker according to claim 1, characterized in that: The front cylinder dustproof ring (0301) is used for sealing when the piston (02) hammers the drill rod (04).

6. A multi-stage anti-fouling and anti-impurity protection structure for a hydraulic breaker according to claim 2, characterized in that: The piston (02) is plugged into the interior of the middle cylinder (01), and the primary spiral groove (01-02) and the secondary spiral groove (01-03) are arranged corresponding to the surface of the piston (02).

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