Hydraulic oscillating cylinder with oil inlet quantity adjusting device

Abstract

The utility model provides a hydraulic oscillating cylinder with an oil inlet quantity adjusting device, which is provided with an outer shell, an oil balance valve is arranged outside the outer shell, a first valve and a second valve are arranged on the oil balance valve, and the first valve and the second valve are respectively communicated with two oil ways inside the oil balance valve. The outer side ports of the first valve and the second valve are connected with a first buffering oil pipe and a second buffering oil pipe respectively, and the first buffering oil pipe and the second buffering oil pipe are both oil pipes with angles. The oil inlet quantity adjusting device is arranged on the hydraulic oscillating cylinder, so that the oil inlet pressure can be adjusted, and when the excavator works in a narrow space or meets a position with a high requirement on an excavating slope, the oil inlet pressure is reduced by adjusting the oil inlet quantity adjusting device, so that the oscillating amplitude and the oscillating speed of the oscillating cylinder are reduced; the swing cylinder can quickly and accurately swing to a required angle, so that the operation time is saved, and the working efficiency is improved. The utility model can be widely applied to hydraulic oscillating cylinders.

Description

Technical Field

[0001] This utility model relates to a hydraulic swing cylinder, and more particularly to a hydraulic swing cylinder with an oil inlet adjustment device. Background Technology

[0002] Hydraulic swing cylinders are devices with a spiral structure that can use hydraulics to generate very high torque in a very small space. They are widely used in excavators, loaders, road machinery and other fields.

[0003] However, since most swing cylinders do not have an oil inlet adjustment device, many problems arise when the swing cylinder is in operation. For example, when the excavator encounters a narrow space or a position with a high requirement for digging slope during normal digging operations, there are stricter requirements for the swing accuracy of the swing cylinder.

[0004] In actual operation, because the swing cylinder has a large swing amplitude and a fast swing speed, it usually needs to swing repeatedly many times to achieve the required swing angle, which wastes operation time and reduces work efficiency. In addition, the frequent small-range back-and-forth swing of the swing cylinder will reduce the service life of the relevant meshing parts inside the swing cylinder. Utility Model Content

[0005] This utility model addresses the above-mentioned technical problems by providing a hydraulic swing cylinder with an oil inlet adjustment device. By installing the oil inlet adjustment device on the hydraulic swing cylinder, the oil inlet pressure can be adjusted. When the excavator is operating in a narrow space or encountering a position requiring a high digging slope, the oil inlet pressure can be reduced by adjusting the oil inlet adjustment device, thereby reducing the swing amplitude and swing speed of the swing cylinder. The swing cylinder can swing quickly and accurately to the required angle, saving operation time and improving work efficiency.

[0006] Therefore, the technical solution of this utility model is a hydraulic swing cylinder with an oil inlet adjustment device, which has an outer shell, a main shaft inside the outer shell, a left section of the main shaft and a left section of the outer shell, a right side bushing on the outer circumference of the left section of the main shaft, the inner circumference of the right side bushing and the outer circumference of the left section of the main shaft being sealed and fixedly connected, and the outer circumference of the right side bushing and the right section of the outer shell being rotatably sealed.

[0007] The inner circumferential surface of the outer casing is provided with an internal gear ring located inside the oil cavity. A rotary piston is provided between the internal gear ring and the main shaft. The inner and outer circumferences on one axial side of the rotary piston are respectively meshed and rotatably connected with the outer circumference of the main shaft and the inner circumference of the internal gear ring. The inner and outer circumferences on the other axial side of the rotary piston are respectively rotatably and sealingly connected with the outer circumference of the main shaft and the inner circumference of the outer casing.

[0008] An oil chamber is provided between the outer casing, the main shaft, and the right-side bushing. The rotating piston divides the oil chamber into a left oil chamber and a right oil chamber.

[0009] The outer casing is provided with a left oil hole and a right oil hole, the left oil hole is connected to the left oil cavity, and the right oil hole is connected to the right oil cavity;

[0010] An oil balance valve is fixedly installed at the upper part of the outer casing. The oil balance valve is provided with a first oil passage and a second oil passage, and the first oil passage and the second oil passage extend to the outside of the oil balance valve on both sides.

[0011] The first oil passage and the second oil passage are respectively equipped with a first valve and a second valve on one side port, and the other side ports of the first oil passage and the second oil passage are respectively connected to the left oil hole and the right oil hole;

[0012] One end of the first valve is connected to the first oil circuit, and the other end of the first valve is provided with a first buffer oil pipe. The first buffer oil pipe is connected to the first valve and is an angled oil pipe.

[0013] One end of the second valve is connected to the second oil circuit, and the other end of the second valve is provided with a second buffer oil pipe. The second buffer oil pipe is connected to the second valve and is an angled oil pipe.

[0014] Preferably, the openings of the first and second buffer oil pipes on the side away from the oil balance valve face towards the lower end of the housing.

[0015] Preferably, a first buffer oil pipe support plate is provided between the first buffer oil pipe and the outer shell, and the first buffer oil pipe and the outer shell are fixedly connected by the first buffer oil pipe support plate.

[0016] A second buffer oil pipe support plate is provided between the second buffer oil pipe and the outer shell, and the second buffer oil pipe and the outer shell are fixedly connected by the second buffer oil pipe support plate.

[0017] Preferably, the first valve and the second valve can be remotely controlled via wired or wireless means.

[0018] Preferably, the first buffer oil pipe, the first valve, the first oil passage, and the left oil hole together form the left oil channel, and a temperature sensor and a pressure sensor are provided on the left oil channel;

[0019] The second buffer oil pipe, the second valve, the second oil circuit, and the right oil hole together form the right oil channel, and a temperature sensor and a pressure sensor are installed on the right oil channel.

[0020] Preferably, a groove is provided on the outer circumference of the port on the first oil line that is connected to the left oil hole, and an oil sealing ring is provided in the groove. The first oil line and the left oil hole are sealed and connected by the oil sealing ring.

[0021] The second oil passage has a groove on the outer circumference of the port on the side that connects to the right oil hole. An oil sealing ring is installed in the groove, and the second oil passage and the right oil hole are sealed and connected through the oil sealing ring.

[0022] Preferably, the oil balance valve is fixed to the housing by screw locking.

[0023] The beneficial effects of this utility model are that by providing a first valve and a second valve on one side port of the first oil circuit and the second oil circuit respectively, the first valve and the second valve can respectively control the pressure of oil transmission and the amount of oil transmission within the same time period, thereby controlling the pressure of oil entering the left oil hole and the left oil chamber and the amount of oil entering the left oil hole and the left oil chamber within the same time period, thereby controlling the speed of the rotary piston and the main shaft rotating synchronously, and finally realizing that the swing cylinder can swing to the required angle quickly and accurately, saving operation time and improving work efficiency.

[0024] Meanwhile, a first buffer oil pipe and a second buffer oil pipe are installed on the outside of the first valve and the second valve respectively. Furthermore, the first buffer oil pipe and the second buffer oil pipe are designed as angled oil pipes, which can play a certain buffering role during the oil transmission process, preventing the oil from being transmitted in a straight line and causing excessive oil pressure impact on the relevant components in the swing cylinder, thereby reducing the service life of the relevant components.

[0025] Furthermore, since the openings of the first and second buffer oil pipes on the side furthest from the oil balance valve face the lower end of the housing, and in actual operation, the axial ends of the housing are used to connect the output load, and the lower end of the housing is connected to the input mechanical arm through a fixed seat, thus, facing the openings of the first and second buffer oil pipes towards the lower end of the housing can effectively prevent interference between the relevant oil circuits on the first and second buffer oil pipes and the swing range of the swing cylinder. Attached Figure Description

[0026] Figure 1 This is a perspective view of the utility model;

[0027] Figure 2 This is another perspective view of the present invention;

[0028] Figure 3 This is the front view of this utility model;

[0029] Figure 4 This is a utility model Figure 3 Sectional view of AA;

[0030] Figure 5 This is a utility model Figure 4 Enlarged view of section B in the middle.

[0031] Explanation of symbols in the diagram:

[0032] 1. Outer casing; 2. Oil balance valve; 3. First valve; 4. Second valve; 5. First buffer oil pipe; 6. Second buffer oil pipe; 7. First buffer oil pipe support plate; 8. Second buffer oil pipe support plate; 9. Main shaft; 10. Right side bushing; 11. Rotary piston; 12. Meshing internal gear ring; 13. Oil chamber; 1301. Left oil chamber; 1302. Right oil chamber; 14. First oil passage; 15. Second oil passage; 16. Left oil hole; 17. Right oil hole; 18. Oil sealing ring; 19. Fixed seat. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments.

[0034] pass Figures 1-5 As can be seen, the hydraulic swing cylinder with oil inlet adjustment device has an outer shell 1. Inside the outer shell 1 is a main shaft 9. The left section of the main shaft 9 is rotatably and sealed to the left section of the outer shell 1. The outer circumference of the left section of the main shaft 9 is provided with a right bushing 10. The inner circumference of the right bushing 10 is sealed and fixedly connected to the outer circumference of the left section of the main shaft 9. The outer circumference of the right bushing 10 is rotatably and sealed to the right section of the outer shell 1. The synchronous rotation of the main shaft 9 and the right bushing 10 ultimately realizes the normal swing operation of the swing cylinder.

[0035] An internal gear ring 12 is provided on the inner circumferential surface of the outer casing 1, located inside the oil cavity 13. A rotary piston 11 is provided between the internal gear ring 12 and the main shaft 9. The inner and outer circumferences on one axial side of the rotary piston 11 are respectively meshed and rotatably connected to the outer circumference of the main shaft 9 and the inner circumference of the internal gear ring 12. The inner and outer circumferences on the other axial side of the rotary piston 11 are respectively rotatably and sealingly connected to the outer circumference of the main shaft 9 and the inner circumference of the outer casing 1.

[0036] An oil chamber 13 is provided between the outer casing 1, the main shaft 9, and the right bushing 10. The rotating piston 11 divides the oil chamber 13 into a left oil chamber 1301 and a right oil chamber 1302. The outer casing 1 is provided with a left oil hole 16 and a right oil hole 17. The left oil hole 16 is connected to the left oil chamber 1301, and the right oil hole 17 is connected to the right oil chamber 1302. External oil enters the left oil chamber 1301 and the right oil chamber 1302 through the left oil hole 16 and the right oil hole 17, respectively, pushing the rotating piston 11 to rotate and translate left and right. While the rotating piston 11 rotates and translates left and right, under the meshing action of the rotating piston 11 with the main shaft 9 and the meshing internal gear ring 12, the main shaft 9 is driven to rotate in the forward and reverse directions, realizing the normal swing operation of the swing cylinder.

[0037] An oil balance valve 2 is fixedly installed at the upper part of the outer casing 1. The oil balance valve 2 can balance the stability of oil transmission and prevent the oil pressure from fluctuating during oil transmission.

[0038] The oil balance valve 2 is provided with a first oil passage 14 and a second oil passage 15. The first oil passage 14 and the second oil passage 15 extend to the outside of the oil balance valve 2 on both sides. A first valve 3 and a second valve 4 are provided on one side of the first oil passage 14 and the second oil passage 15 respectively. The other side of the first oil passage 14 and the second oil passage 15 are connected to the left oil hole 16 and the right oil hole 17 respectively.

[0039] The first valve 3 and the second valve 4 can control the pressure of the oil transmission and the amount of oil in the same time period, respectively. Similarly, they can control the pressure of the oil entering the left oil hole 16 and the left oil chamber 1301 and the amount of oil entering the left oil hole 16 and the left oil chamber 1301 in the same time period, and finally control the speed at which the rotary piston 11 rotates synchronously with the main shaft 9.

[0040] One end of the first valve 3 is connected to the first oil passage 14, and the other end of the first valve 3 is provided with a first buffer oil pipe 5. The first buffer oil pipe 5 is connected to the first valve 3. The first buffer oil pipe 5 is an angled oil pipe. One end of the second valve 4 is connected to the second oil passage 15, and the other end of the second valve 4 is provided with a second buffer oil pipe 6. The second buffer oil pipe 6 is connected to the second valve 4. The second buffer oil pipe 6 is an angled oil pipe.

[0041] By designing the first buffer oil pipe 5 and the second buffer oil pipe 6 as angled oil pipes, a certain buffering effect can be achieved during the oil transmission process, preventing the oil from being transmitted in a straight line and causing excessive oil pressure impact on the relevant components in the swing cylinder, thus reducing the service life of the relevant components.

[0042] The openings of the first buffer oil pipe 5 and the second buffer oil pipe 6 on the side away from the oil balance valve 2 are oriented towards the lower end of the housing 1. In actual operation, the two axial ends of the housing 1 are used to connect the output load, and the lower end of the housing 1 is connected to the input mechanical arm through the fixed seat 19. Therefore, oriented the openings of the first buffer oil pipe 5 and the second buffer oil pipe 6 towards the lower end of the housing 1 can effectively prevent interference between the relevant oil circuits on the first buffer oil pipe 5 and the second buffer oil pipe 6 and the swing range of the swing cylinder.

[0043] A first buffer oil pipe support plate 7 is provided between the first buffer oil pipe 5 and the outer shell 1, and the first buffer oil pipe 5 and the outer shell 1 are fixedly connected by the first buffer oil pipe support plate 7. A second buffer oil pipe support plate 8 is provided between the second buffer oil pipe 6 and the outer shell 1, and the second buffer oil pipe 6 and the outer shell 1 are fixedly connected by the second buffer oil pipe support plate 8. The first buffer oil pipe support plate 7 and the second buffer oil pipe support plate 8 respectively play a role in fixing and supporting the first buffer oil pipe 5 and the second buffer oil pipe 6, effectively preventing the first buffer oil pipe 5 and the second buffer oil pipe 6 from breaking when subjected to external impact, increasing the robustness of the first buffer oil pipe 5 and the second buffer oil pipe 6, and making them more suitable for harsh environments.

[0044] The first valve 3 and the second valve 4 can be remotely controlled via wired or wireless means. The first valve 3 and the second valve 4 can be mechanical or electronic valves. The control method can be remote adjustment via pure mechanical connection, electronic wired connection, or electronic wireless signal connection. Operators can achieve remote control from the control room, which is convenient and fast.

[0045] The first buffer oil pipe 5, the first valve 3, the first oil passage 14, and the left oil hole 16 together form the left oil channel. A temperature sensor and a pressure sensor are installed on the left oil channel. The second buffer oil pipe 6, the second valve 4, the second oil passage 15, and the right oil hole 17 together form the right oil channel. A temperature sensor and a pressure sensor are installed on the right oil channel. The temperature and pressure sensors can monitor the oil temperature and pressure in the left and right oil channels in real time. Other monitoring devices can also be connected to the left and right oil channels according to actual usage needs. The relevant monitoring devices can be connected by wired or wireless connection, and the operator can remotely view the real-time status of the swing cylinder.

[0046] The first oil passage 14 has a groove on the outer circumference of the port connected to the left oil hole 16, and an oil sealing ring 18 is provided in the groove. The first oil passage 14 and the left oil hole 16 are sealed and connected through the oil sealing ring 18. The second oil passage 15 has a groove on the outer circumference of the port connected to the right oil hole 17, and an oil sealing ring 18 is provided in the groove. The second oil passage 15 and the right oil hole 17 are sealed and connected through the oil sealing ring 18. By setting the oil sealing ring 18, hydraulic oil can be prevented from leaking outward from the gap between the first oil passage 14 and the left oil hole 16 and between the second oil passage 15 and the right oil hole 17.

[0047] The oil balance valve 2 is fixed to the outer casing 1 by screw locking, which makes it easy to disassemble and assemble the oil balance valve 2, bringing convenience to inspection and maintenance.

[0048] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A hydraulic swing cylinder with an oil inlet quantity regulating device, characterized in that: The device has an outer shell, inside which is a main shaft. The left section of the main shaft is rotatably and sealed to the left section of the outer shell. The outer circumference of the left section of the main shaft is provided with a right-side bushing. The inner circumference of the right-side bushing is sealed and fixedly connected to the outer circumference of the left section of the main shaft. The outer circumference of the right-side bushing is rotatably and sealed to the right section of the outer shell. The inner circumferential surface of the outer casing is provided with an internal gear ring located inside the oil cavity. A rotating piston is provided between the internal gear ring and the main shaft. The inner and outer circumferences of the rotating piston on one axial side are respectively meshed and rotatably connected with the outer circumference of the main shaft and the inner circumference of the internal gear ring. The inner and outer circumferences of the rotating piston on the other axial side are respectively rotatably and sealingly connected with the outer circumference of the main shaft and the inner circumference of the outer casing. An oil chamber is provided between the outer shell, the main shaft, and the right side bushing, and the rotating piston divides the oil chamber into a left oil chamber and a right oil chamber. The outer casing is provided with a left oil hole and a right oil hole, the left oil hole is connected to the left oil cavity, and the right oil hole is connected to the right oil cavity; An oil balance valve is fixedly provided at the upper part of the outer shell. The oil balance valve is provided with a first oil passage and a second oil passage, and the first oil passage and the second oil passage extend to the outside of the oil balance valve on both sides. The first oil passage and the second oil passage are respectively equipped with a first valve and a second valve on one side port, and the other side ports of the first oil passage and the second oil passage are respectively connected to the left oil hole and the right oil hole; One end of the first valve is connected to the first oil circuit, and the other end of the first valve is provided with a first buffer oil pipe. The first buffer oil pipe is connected to the first valve and is an angled oil pipe. One end of the second valve is connected to the second oil circuit, and the other end of the second valve is provided with a second buffer oil pipe. The second buffer oil pipe is connected to the second valve and is an angled oil pipe.

2. The hydraulic swing cylinder with an oil inlet quantity regulating device according to claim 1, characterized in that: The openings of the first and second buffer oil pipes on the side away from the oil balance valve face towards the lower end of the outer casing.

3. The hydraulic swing cylinder with an oil inlet quantity regulating device according to claim 2, characterized in that: A first buffer oil pipe support plate is provided between the first buffer oil pipe and the outer shell, and the first buffer oil pipe and the outer shell are fixedly connected by the first buffer oil pipe support plate. A second buffer oil pipe support plate is provided between the second buffer oil pipe and the outer shell, and the second buffer oil pipe and the outer shell are fixedly connected by the second buffer oil pipe support plate.

4. The hydraulic swing cylinder with an oil inlet quantity adjustment device according to claim 3, characterized in that: The first valve and the second valve can be remotely controlled via wired or wireless means.

5. The hydraulic swing cylinder with an oil inlet quantity regulating device according to claim 4, characterized in that: The first buffer oil pipe, the first valve, the first oil passage, and the left oil hole together form the left oil channel, and a temperature sensor and a pressure sensor are provided on the left oil channel; The second buffer oil pipe, the second valve, the second oil passage, and the right oil hole together form the right oil channel, and a temperature sensor and a pressure sensor are provided on the right oil channel.

6. The hydraulic swing cylinder with an oil inlet quantity regulating device according to claim 5, characterized in that: The first oil passage has a groove on the outer circumference of the side port that communicates with the left oil hole, and an oil sealing ring is provided in the groove. The first oil passage and the left oil hole are sealed and connected by the oil sealing ring. The second oil passage has a groove on the outer circumference of the port on the side that communicates with the right oil hole. An oil sealing ring is provided in the groove, and the second oil passage and the right oil hole are sealed and connected by the oil sealing ring.

7. The hydraulic swing cylinder with an oil inlet quantity regulating device according to any one of claims 1-6, characterized in that: The oil balance valve is fixed to the housing by screw locking.

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