Double-oil-return structure of breaking hammer cylinder body

Abstract

The utility model discloses a double oil return structure of a breaking hammer cylinder body, which comprises a cylinder body, the middle upper ends of the left side and the right side of the cylinder body are respectively provided with an oil inlet channel, and the middle ends of the left side and the right side of the cylinder body are respectively provided with an oil return channel. The hydraulic oil in the device can further provide auxiliary power for the piston rod to impact the drill rod with the help of the energy storage mechanism, so that the crushing performance of the device is improved, and the stability of the hydraulic oil in the device is kept; the oil filtering mechanisms are arranged on the left side and the right side of the cylinder body, hydraulic oil in the device can drive filtering in the oil returning process, pollutants in the hydraulic oil are prevented from influencing work of the device, meanwhile, the interior of each oil filtering mechanism cleans a filtering frame under cooperation of a vortex fan and a cleaning frame, and the oil filtering mechanisms achieve the self-cleaning effect; therefore, the service time of the mechanism is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field related to a breaker hammer, in particular to a double oil return structure of a breaker hammer cylinder. Background Art

[0002] The traditional hydraulic breaker cylinder structure is usually only equipped with one high-pressure oil channel and one return oil channel, and these oil channels are generally located on the same side of the cylinder. However, this design has some problems. First, since there is only one return oil channel, when the hydraulic oil flows from the high-pressure oil channel into the front oil tank, due to the single-sided oil inflow, the high-pressure hydraulic oil may have a greater impact force on the cylinder, thereby affecting the stability and service life of the cylinder. Secondly, the design of only one return oil channel may also cause the hydraulic oil to flow unsmoothly, thus affecting the working efficiency of the hydraulic breaker.

[0003] Existing hydraulic breaker hammers, such as the Chinese utility model patent with patent number: CN201921672475.X, discloses "A double oil return structure of a breaker cylinder body". In this device, two oil guide passages that penetrate the middle cylinder body are provided on the middle cylinder body, and plugs are provided at the openings of the corresponding oil guide passages at both ends of the middle cylinder body. The inner peripheral wall of the middle cylinder body at the front end of the piston cavity is provided with a return oil ring channel 1 and a return oil ring channel 2. The return oil ring channel 1 and the two oil guide passages are provided with a connecting oil channel 1 to connect them, and the return oil ring channel 2 and the two oil guide passages are provided with a connecting oil channel 2 to connect them. The inner peripheral wall of the middle cylinder body at the rear end of the piston cavity is provided with a circulating oil passage, and the circulating oil passage is provided with a connecting oil passage 3 to connect them with the two oil guide passages. This device has the advantages of good lubrication effect and reduced wear.

[0004] Although the above device has certain advantages, it still has certain defects:

[0005] 1. The device does not filter the hydraulic oil. Dirt may be generated inside the device during operation, and these dirt may affect the normal operation of the device.

[0006] 2. The device does not provide further assistance to the movement of the piston, and does not maintain the oil pressure fit and stability inside the device, which is not conducive to the overall working efficiency of the device. Utility Model Content

[0007] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a double oil return structure of a breaker hammer cylinder.

[0008] The utility model is realized by constructing a double oil return structure of a breaker cylinder body, the device comprises a cylinder body, the middle upper ends of the left and right sides of the cylinder body are respectively provided with oil inlet channels, the middle ends of the left and right sides of the cylinder body are respectively provided with oil return channels, the left and right sides of the cylinder body are respectively provided with reversing valves, and the middle end of the cylinder body is provided with a piston rod;

[0009] Energy storage mechanism, the left and right cavities inside the cylinder are respectively provided with energy storage mechanisms; oil filter mechanism, the left and right sides of the cylinder are respectively provided with oil filter mechanisms;

[0010] The energy storage mechanism includes: a cover plate, the lower ends of the left and right sides of the cylinder body are fixedly connected to the cover plate by bolts respectively, a connecting rod is provided in the through hole at the middle end of the cover plate, the threaded part at the left end of the connecting rod is threadedly connected to the nut, the middle end of the right side of the cover plate is fixedly connected to the left end of the energy storage spring, and the energy storage spring covers the right end of the connecting rod, the right ends of the connecting rod and the energy storage spring are fixedly connected to the left side of the first piston plate, and a connecting arm is provided at the upper end of the left side of the first piston plate, and the connecting arm is rotatably connected to the roller in the left groove.

[0011] Preferably, the oil filter mechanism includes: an oil filter housing, the left and right sides of the cylinder body are respectively fixedly connected to the side protrusions of the oil filter housing, an oil inlet pipe is provided at the upper right end of the oil filter housing, and the right end of the oil inlet pipe is fixedly connected to the oil return channel, an oil outlet pipe is provided at the lower left end of the oil filter housing, a movable rod is provided in the middle movable cavity inside the oil filter housing, and a vortex fan is provided on the upper side of the upper end of the oil filter housing.

[0012] Preferably, a filter frame is provided on the top surface of the lower cavity inside the oil filter housing, a return spring is provided on the outside of the movable rod, and the left side of the return spring is fixedly connected to the oil filter housing, the right end of the movable rod is fixedly connected to the middle through hole of the second piston plate, and a cleaning rack is provided on the lower end shaft of the vortex fan.

[0013] Preferably, four groups of connecting arms and rollers are symmetrically provided at four locations on the left side of the first piston plate.

[0014] Preferably, the right end of the return spring contacts the left side surface of the second piston plate.

[0015] Preferably, cleaning brushes are conveniently provided on the four outer sides of the cleaning frame.

[0016] The utility model has the following advantages: The utility model provides a double oil return structure of a breaker cylinder body through improvement, which has the following improvements compared with the same type of equipment:

[0017] The double oil return structure of a breaker hammer cylinder body described in the utility model arranges an energy storage mechanism in the left and right cavities inside the cylinder body, so that the hydraulic oil inside the device can further provide auxiliary power for the piston rod to impact the drill rod with the help of the energy storage mechanism, thereby increasing the crushing performance of the device and maintaining the stability of the hydraulic oil inside the device.

[0018] The double oil return structure of a breaker hammer cylinder body described in the utility model arranges oil filter mechanisms on the left and right sides of the cylinder body, so that the hydraulic oil inside the device can be driven to be filtered during the oil return process, thereby preventing pollutants in the hydraulic oil from affecting the operation of the device. At the same time, the filter frame inside the oil filter mechanism is cleaned with the cooperation of the vortex fan and the cleaning rack, so that the oil filter mechanism can achieve a self-cleaning effect, thereby extending the service life of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the cylinder body of the utility model;

[0021] Figure 3 This is a schematic diagram of the front view structure of the energy storage mechanism of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the energy storage mechanism of the utility model;

[0023] Figure 5 This is a schematic diagram of the oil filter structure of the utility model;

[0024] Figure 6 It is a schematic diagram of the internal structure of the oil filter housing of the utility model.

[0025] Among them: cylinder body-1, oil inlet channel-2, oil return channel-3, reversing valve-4, piston rod-5, energy storage mechanism-6, cover plate-61, connecting rod-62, nut-63, energy storage spring-64, first piston plate-65, connecting arm-66, roller-67, oil filter mechanism-7, oil filter housing-71, oil inlet pipe-72, oil outlet pipe-73, movable rod-74, reset spring-75, second piston plate-76, vortex fan-77, cleaning rack-78, filter frame-79. DETAILED DESCRIPTION

[0026] The following will be combined with the attached Figure 1-6 The utility model is described in detail, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1:

[0027] See also Figure 1 and Figure 2The utility model provides a double oil return structure for a breaker cylinder body, wherein the upper and middle ends of the left and right sides of the cylinder body 1 are respectively provided with oil inlet passages 2, the middle ends of the left and right sides of the cylinder body 1 are respectively provided with oil return passages 3, the left and right sides of the cylinder body 1 are respectively provided with reversing valves 4, and the middle end of the cylinder body 1 is provided with a piston rod 5.

[0028] See also Figure 5 and Figure 6 The double oil return structure of a breaker cylinder body of the utility model comprises: the left and right sides of the cylinder body 1 are respectively fixedly connected to the side protrusions of the oil filter housing 71, an oil inlet pipe 72 is provided at the upper right end of the oil filter housing 71, and the right end of the oil inlet pipe 72 is fixedly connected to the oil return channel 3, an oil outlet pipe 73 is provided at the lower left end of the oil filter housing 71, a movable rod 74 is provided in the middle movable cavity inside the oil filter housing 71, and a vortex fan 77 is provided on the upper side of the upper end of the oil filter housing 71; a filter frame 79 is provided on the top surface of the lower cavity inside the oil filter housing 71, a return spring 75 is provided on the outer side of the movable rod 74, and the left side of the return spring 75 is fixedly connected to the oil filter housing 71, the right end of the movable rod 74 is fixedly connected to the middle end through hole of the second piston plate 76, and a cleaning frame 78 is provided on the lower end shaft of the vortex fan 77; the right end of the return spring 75 is in contact with the left side of the second piston plate 76; cleaning brushes are conveniently provided on the four sides of the outer side of the cleaning frame 78. Embodiment 2:

[0029] The utility model discloses a double oil return structure of a breaker hammer cylinder, wherein an energy storage mechanism 6 comprises: the lower ends of the left and right sides of the cylinder body 1 are fixedly connected to a cover plate 61 by bolts respectively, a connecting rod 62 is provided in a through hole at the middle end of the cover plate 61, a threaded portion at the left end of the connecting rod 62 is threadedly connected to a nut 63, a middle end of the right side of the cover plate 61 is fixedly connected to the left end of an energy storage spring 64, and the energy storage spring 64 covers the right end of the connecting rod 62, the right ends of the connecting rod 62 and the energy storage spring 64 are fixedly connected to the left side of a first piston plate 65, a connecting arm 66 is provided at the upper end on the left side of the first piston plate 65, and the connecting arm 66 is rotatably connected to a roller 67 in the left groove; four groups of connecting arms 66 and rollers 67 are symmetrically provided at four places on the left side of the first piston plate 65.

[0030] The utility model provides a double oil return structure of a breaker hammer cylinder body through improvement, and its working principle is as follows;

[0031] First, when using this device, first place the device in the working area, and then connect the device to the external oil pump;

[0032] Secondly, first, with the help of an external oil pump, the hydraulic oil enters the cylinder body 1 through the oil inlet channel 2. At this time, the hydraulic oil is blocked by the reversing valve 4 and can only move along the upper and lower paths of the oil inlet channel 2. The upper path pushes the reversing valve 4 back to reach the lower dead center, so that the reversing valve 4 connects the middle-end oil cylinder in the cylinder body 1 with the return oil channels 3 on both sides, and the lower path reaches the energy storage mechanism 6 and the middle-end oil cylinder in the cylinder body 1 at the same time, while pushing the first piston plate 65 to move outward along the connecting rod 62, the connecting arm 66 and the roller 67, and compressing the energy storage spring 64, while filling the middle-end oil cylinder in the cylinder body 1 with oil, driving the piston rod 5 to move upward, and the upper piston rod 5 squeezes the hydraulic oil out along the return oil channels 3 on the left and right sides, and the piston rod 5 When it moves to the top dead center, the oil circuit of the lower chamber of the reversing valve 4 is connected, and the hydraulic oil drives the bottom of the reversing valve 4 from the middle oil cylinder inside the cylinder body 1. Since the area of ​​the lower chamber of the reversing valve 4 is larger, the oil pressure is greater than that of the upper chamber, so the reversing valve 4 is pressurized and moves upward to connect the oil inlet channel 2 with the oil circuit of the middle oil cylinder inside the cylinder body 1. At this time, the piston rod 5 will be subjected to the oil pressure in the opposite direction, lose support and start to move downward. During this period, the top of the piston rod 5 will be subjected to the thrust of the compressed air chamber, and the upper side of the piston rod 5 will be subjected to the thrust generated by the energy storage spring 64 inside the energy storage mechanism 6 pushing the first piston plate 65 back, thereby accelerating the downward movement of the piston rod 5. The piston rod 5 will continuously squeeze the hydraulic oil on the lower side to its upper side, and finally hit the drill rod;

[0033] Third, at the same time, the cavity at the middle end of the piston rod 5 is connected to the lower chamber of the reversing valve 4 and starts to release pressure. The reversing valve 4 is pushed downward by the oil pressure on the upper side, pushing the hydraulic oil into the cavity at the middle end of the piston rod 5 and discharged from the oil return channel 3. The reversing valve 4 drives the bottom dead point again and connects the oil return channel 3 of the upper cylinder, thus starting the next cycle;

[0034] Fourth, when the hydraulic oil is discharged from the oil return channel 3, the hydraulic oil will enter the oil filter housing 71 through the oil inlet pipe 72, and the hydraulic oil will push the piston plate 76 to move left along the movable rod 74 and compress the reset spring 75. At the same time, the flow of hydraulic oil will drive the vortex fan 77 to rotate, so that the vortex fan 77 drives the cleaning frame 78 to rotate, and the cleaning frame 78 will drive the cleaning brush thereon to clean the inner wall of the filter frame 79, so that the hydraulic oil passes through the filter frame 79 from the oil outlet pipe 73 to the outside. The pollutants left behind will not clog the filter frame 79, thereby achieving a self-cleaning effect.

[0035] The utility model provides a double oil return structure of a breaker hammer cylinder body through improvement. By arranging an energy storage mechanism 6 in the left and right cavities inside the cylinder body 1, the hydraulic oil inside the device can further provide auxiliary power for the piston rod 5 to impact the drill rod with the help of the energy storage mechanism 6, thereby increasing the crushing performance of the device and maintaining the stability of the hydraulic oil inside the device; by arranging the oil filter mechanism 7 on the left and right sides of the cylinder body 1, the hydraulic oil inside the device can be driven to be filtered during the oil return process, thereby preventing pollutants in the hydraulic oil from affecting the operation of the device, and at the same time, the filter frame 79 is cleaned inside the oil filter mechanism 7 with the cooperation of the vortex fan 77 and the cleaning frame 78, so that the oil filter mechanism 7 can achieve a self-cleaning effect, thereby extending the service life of the mechanism.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model, and the standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double oil return structure of a breaker cylinder, comprising a cylinder (1), wherein the middle upper ends of the left and right sides of the cylinder (1) are respectively provided with oil inlet passages (2), the middle ends of the left and right sides of the cylinder (1) are respectively provided with oil return passages (3), the left and right sides of the cylinder (1) are respectively provided with reversing valves (4), and the middle end of the cylinder (1) is provided with a piston rod (5); Features: Also includes: An energy storage mechanism (6), wherein the left and right cavities inside the cylinder body (1) are respectively provided with energy storage mechanisms (6); an oil filter mechanism (7), wherein the left and right sides of the cylinder body (1) are respectively provided with oil filter mechanisms (7); The energy storage mechanism (6) comprises a cover plate (61), the lower ends of the left and right sides of the cylinder body (1) are fixedly connected to the cover plate (61) by bolts respectively, a connecting rod (62) is provided in a through hole at the middle end of the cover plate (61), a threaded portion at the left end of the connecting rod (62) is threadedly connected to a nut (63), a middle end of the right side of the cover plate (61) is fixedly connected to the left end of an energy storage spring (64), and the energy storage spring (64) covers the right end of the connecting rod (62), the right ends of the connecting rod (62) and the energy storage spring (64) are fixedly connected to the left side of a first piston plate (65), and a connecting arm (66) is provided at the upper end of the left side of the first piston plate (65), and the connecting arm (66) is rotatably connected to a roller (67) in a left groove.

2. According to claim 1, the double oil return structure of the breaker cylinder is characterized in that: The oil filter mechanism (7) comprises: an oil filter housing (71); the left and right sides of the cylinder body (1) are respectively fixedly connected to the side protrusions of the oil filter housing (71); an oil inlet pipe (72) is provided at the upper right end of the oil filter housing (71); and the right end of the oil inlet pipe (72) is fixedly connected to the oil return passage (3); an oil outlet pipe (73) is provided at the lower left end of the oil filter housing (71); a movable rod (74) is provided in the middle movable cavity inside the oil filter housing (71); and a vortex fan (77) is provided at the upper side of the upper end of the oil filter housing (71).

3. According to claim 2, the double oil return structure of the breaker cylinder is characterized in that: A filter frame (79) is provided on the top surface of the lower cavity inside the oil filter housing (71), a return spring (75) is provided on the outer side of the movable rod (74), and the left side of the return spring (75) is fixedly connected to the oil filter housing (71), the right end of the movable rod (74) is fixedly connected to the middle end through hole of the second piston plate (76), and a cleaning frame (78) is provided on the lower end shaft of the vortex fan (77).

4. According to claim 3, the double oil return structure of the breaker cylinder is characterized in that: Four groups of connecting arms (66) and rollers (67) are symmetrically provided at four locations on the left side of the first piston plate (65).

5. According to claim 4, the double oil return structure of the breaker cylinder is characterized in that: The right end of the return spring (75) contacts the left side surface of the second piston plate (76).

6. The double oil return structure of a breaker cylinder according to claim 5 is characterized in that: Cleaning brushes are conveniently arranged on the four outer sides of the cleaning frame (78).

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