Hydraulic swing motor

Abstract

The utility model discloses a hydraulic swing motor, and belongs to the technical field of hydraulic swing motors. Comprising a driving piece and an output piece, the driving piece comprises a first shell, the output piece comprises a second shell, the second shell is installed on the bottom face of the first shell, the first shell is cubic, the second shell is cylindrical, a rack is arranged in the first shell in a sliding mode, oil inlet holes are formed in the two ends of the first shell respectively, and pipe connectors are installed in the oil inlet holes; hydraulic rubber pipes are connected between the oil inlet holes and the side faces of the racks, the driving part further comprises an oil injection part, the oil injection part pumps hydraulic oil into the hydraulic rubber pipes, a rotating shaft is rotationally connected to the interior of the second shell, a gear is installed on the outer side of the rotating shaft and connected with the racks in a meshed mode, and the free end of the rotating shaft is located on the outer side of the second shell; the hydraulic swing motor can achieve the purpose of ensuring that hydraulic oil cannot leak inwards in a simple and convenient mode.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic swing motors, and specifically relates to a hydraulic swing motor. Background Art

[0002] A hydraulic swing motor, also known as a swing hydraulic cylinder, is a closely assembled fitting that combines very high torque using hydraulics in a very small space. It adopts a combined spiral tooth structure inside. The entire swing hydraulic cylinder can generate a relatively large torque in a small space. According to the different internal structures, it can be divided into a vane type structure and a gear-rack type structure.

[0003] At present, gear-rack type hydraulic swing motors generally have large internal leakage, resulting in a decrease in oil pressure, which in turn causes problems such as unstable load or movement jamming. At the same time, the existing motor sealing structure for preventing internal leakage is realized by a separate component, and the structure is complex. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hydraulic swing motor to solve the problems raised in the above background art.

[0005] In view of the above problems, the technical solution proposed by the utility model is:

[0006] A hydraulic swing motor includes a driving part and an output part. The driving part includes a first housing, and the output part includes a second housing. The second housing is installed on the bottom surface of the first housing. The first housing is cube-shaped, and the second housing is cylindrical. A rack is slidably arranged inside the first housing. Oil inlet holes are respectively arranged at both ends of the first housing. Pipe connectors are installed inside the oil inlet holes. Hydraulic hoses are connected between the oil inlet holes and the side surface of the rack. The driving part further includes an oil injection part, and the oil injection part pumps hydraulic oil into the hydraulic hoses. A rotating shaft is rotatably connected inside the second housing. A gear is installed on the outer side of the rotating shaft. The gear is meshed with the rack. The free end of the rotating shaft is located outside the second housing.

[0007] Further, the hydraulic hose sequentially includes an inner rubber layer, a reinforcing layer, and an outer rubber layer from the inside to the outside. The inner rubber layer and the outer rubber layer are both made of rubber material, and the reinforcing layer is made of fiber material.

[0008] The beneficial effect of adopting the above further scheme is that by using a pair of hydraulic hoses, the pumped hydraulic oil can only flow inside the hydraulic hoses. Both ends of the hydraulic hoses are sealed and installed, so the hydraulic oil will not leak out from the hydraulic hoses to ensure the sealing performance of the hydraulic swing motor. At the same time, both the inner rubber layer and the outer rubber layer are made of hydrogenated nitrile rubber, so they not only have high-pressure resistance to hydraulic oil but also have the ability to stretch, preventing the hydraulic hoses from hindering the movement of the rack.

[0009] Furthermore, the oil injection component includes a three-way valve. There are conduits connected between the two output ends of the three-way valve and a pair of the pipe connectors, and a first oil pump is connected to the input end of the three-way valve.

[0010] Furthermore, oil outlet pipes are communicated with the outside of a pair of the conduits, and the free ends of the oil outlet pipes are connected to a second oil pump through solenoid valves.

[0011] The beneficial effect of adopting the above further solution is that the input end of the first oil pump is connected to the fuel tank. The operation of the first oil pump can pump hydraulic oil into the three-way valve, and the three-way valve can determine which conduit the hydraulic oil flows into, so that the hydraulic oil acts on one end of the rack, causing the rack to move and driving the gear to rotate. Finally, torque is transmitted through the rotating shaft. Through the second oil pump and the solenoid valve, the hydraulic oil in the conduit can be discharged, thereby controlling the pressure of the hydraulic oil acting on one end of the rack. At the same time, the first pump is used to increase the pressure of the hydraulic oil on the other end of the rack, so as to achieve the purpose of reversing the movement of the rack.

[0012] Furthermore, a bearing is installed inside the second housing, and the inner ring of the bearing is installed on the outside of the rotating shaft.

[0013] The beneficial effect of adopting the above further solution is that one end of the rotating shaft is connected to the second housing. The inner ring of the bearing is installed on the rotating shaft, and the outer ring of the bearing is connected to the inner wall of the second housing, thereby improving the stability of the rotating shaft through the bearing.

[0014] Furthermore, a connection port is provided at the connection between the first housing and the second housing, and the meshing part of the gear and the rack is located inside the connection port.

[0015] Furthermore, both the first housing and the second housing are made of metal.

[0016] Compared with the prior art, the beneficial effect of the present utility model is that for this hydraulic swing motor, by using a pair of hydraulic hoses, the pumped hydraulic oil will only flow inside the hydraulic hoses. Both ends of the hydraulic hoses are sealed and installed, so the hydraulic oil will not leak out of the hydraulic hoses, thus ensuring the stability of the operation of the hydraulic swing motor. At the same time, this sealing method only uses a pair of hydraulic hoses, so it is simpler than the existing sealing methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the first three-dimensional structural schematic diagram of the hydraulic swing motor disclosed in the embodiment of the present utility model;

[0018] Figure 2 It is the second structural schematic diagram of the hydraulic swing motor disclosed in the embodiment of the present utility model;

[0019] Figure 3 Explosion structure schematic diagram of the hydraulic swing motor disclosed in the embodiment of the present utility model;

[0020] Figure 4 Cross-sectional structure schematic diagram of the hydraulic swing motor disclosed in the embodiment of the present utility model.

[0021] In the figure: 100, driving member; 1001, first housing; 1002, conduit; 1003, three-way valve; 1004, oil inlet hole; 1005, rack; 1006, hydraulic hose; 1007, pipe connector; 1008, oil outlet pipe; 200, output member; 2001, second housing; 2002, bearing; 2003, rotating shaft; 2004, gear; 2005, connection port. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1 - Figure 4, the present utility model provides a technical solution: a hydraulic swing motor, comprising a driving member 100 and an output member 200. The driving member 100 includes a first housing 1001, and the output member 200 includes a second housing 2001. The second housing 2001 is installed on the bottom surface of the first housing 1001, and the first housing 1001 is cube-shaped, while the second housing 2001 is cylindrical. A rack 1005 is slidably disposed inside the first housing 1001. Oil inlet holes 1004 are respectively provided at both ends of the first housing 1001, and pipe connectors 1007 are installed inside the oil inlet holes 1004. Hydraulic hoses 1006 are connected between the sides of the oil inlet holes 1004 and the rack 1005. The driving member 100 further includes an oil injection member, and the oil injection member pumps hydraulic oil into the hydraulic hoses 1006. A rotating shaft 2003 is rotatably connected inside the second housing 2001, and a gear 2004 is installed on the outer side of the rotating shaft 2003. The gear 2004 is meshed with the rack 1005. The free end of the rotating shaft 2003 is located outside the second housing 2001. The hydraulic hose 1006 sequentially includes an inner rubber layer, a reinforcing layer, and an outer rubber layer from the inside to the outside. Both the inner rubber layer and the outer rubber layer are made of rubber material, and the reinforcing layer is made of fiber material. By using a pair of hydraulic hoses 1006, the pumped hydraulic oil will only flow inside the hydraulic hoses 1006, and both ends of the hydraulic hoses 1006 are sealed and installed, so the hydraulic oil will not leak out from the hydraulic hoses 1006 to ensure the sealing performance of the hydraulic swing motor. At the same time, both the inner rubber layer and the outer rubber layer are made of hydrogenated nitrile rubber, so they not only have high-pressure resistance to hydraulic oil but also have the ability to stretch, so that the hydraulic hoses 1006 will not hinder the movement of the rack 1005.

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figure 1 - Figure 4, the present utility model provides a technical solution: a hydraulic swing motor. The oil injection part includes a three-way valve 1003. There are conduits 1002 connected between the two output ends of the three-way valve 1003 and a pair of pipe connectors 1007. The input end of the three-way valve 1003 is connected to a first oil pump. An oil outlet pipe 1008 is communicated with the outside of each of the pair of conduits 1002, and the free ends of the oil outlet pipes 1008 are connected to a second oil pump through solenoid valves. The input end of the first oil pump is connected to a fuel tank. The operation of the first oil pump can pump hydraulic oil into the three-way valve 1003, and the three-way valve 1003 can determine which conduit 1002 the hydraulic oil flows into, so that the hydraulic oil acts on one end of the rack 1005, causing the rack 1005 to move, driving the gear 2004 to rotate, and transmitting torque through the rotating shaft 2003. Through the second oil pump and the solenoid valve, the hydraulic oil in the conduit 1002 can be discharged, thereby controlling the pressure of the hydraulic oil acting on one end of the rack 1005. At the same time, the first pump is used to increase the pressure of the hydraulic oil on the other end of the rack 1005, so as to achieve the purpose of reversing the movement of the rack 1005. Finally, the rack 1005 fits against the inner wall of the first housing 1001, thereby completing the limitation of the rack 1005 and ensuring the linear movement of the rack 1005.

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1 - Figure 4 , the present utility model provides a technical solution: a hydraulic swing motor. A bearing 2002 is installed inside the second housing 2001. The inner ring of the bearing 2002 is installed on the outside of the rotating shaft 2003. One end of the rotating shaft 2003 is connected to the second housing 2001. The inner ring of the bearing 2002 is installed on the rotating shaft 2003, and the outer ring of the bearing 2002 is connected to the inner wall of the second housing 2001, thereby improving the stability of the rotating shaft 2003 through the bearing 2002.

[0028] Specifically, the working principle of this hydraulic swing motor is as follows: When in use, connect the free end of the rotating shaft 2003 to the component to be driven, connect the input end of the first pump and the output end of the second pump to the fuel tank, then start the first pump and control the three-way valve 1003. The operation of the first oil pump can pump hydraulic oil into the three-way valve 1003, and the three-way valve 1003 can determine which conduit 1002 the hydraulic oil flows into, so that the hydraulic oil acts on one end of the rack 1005, causing the rack 1005 to move and driving the gear 2004 to rotate. Finally, torque is transmitted through the rotating shaft 2003 to make the component swing. The operation of the second oil pump and the solenoid valve can discharge the hydraulic oil in the conduit 1002, thereby controlling the pressure of the hydraulic oil acting on one end of the rack 1005. At the same time, the first pump is used to increase the pressure of the hydraulic oil on the other end of the rack 1005, so as to achieve the purpose of reversing the movement of the rack 1005 and making the component swing in the reverse direction.

Claims

1. A hydraulic swing motor, characterized in that, It includes a driving member (100) and an output member (200). The driving member (100) includes a first housing (1001). The output member (200) includes a second housing (2001). The second housing (2001) is installed on the bottom surface of the first housing (1001). The first housing (1001) is cube-shaped, and the second housing (2001) is cylindrical. A rack (1005) is slidably arranged inside the first housing (1001). Oil inlet holes (1004) are respectively arranged at both ends of the first housing (1001). A pipe connector (1007) is installed inside the oil inlet hole (1004). Hydraulic hoses (1006) are connected between the oil inlet hole (1004) and the side surface of the rack (1005). The driving member (100) further includes an oil injection member, and the oil injection member pumps hydraulic oil into the hydraulic hose (1006). A rotating shaft (2003) is rotatably connected inside the second housing (2001). A gear (2004) is installed on the outer side of the rotating shaft (2003). The gear (2004) is meshed with the rack (1005). The free end of the rotating shaft (2003) is located outside the second housing (2001).

2. The hydraulic swing motor according to claim 1, wherein, The hydraulic hose (1006) sequentially includes an inner rubber layer, a reinforcing layer, and an outer rubber layer from inside to outside. Both the inner rubber layer and the outer rubber layer are made of rubber material, and the reinforcing layer is made of fiber material.

3. The hydraulic swing motor according to claim 1, characterized in that, The oil injection member includes a three-way valve (1003). Guide pipes (1002) are connected between the two output ends of the three-way valve (1003) and a pair of the pipe connectors (1007). The input end of the three-way valve (1003) is connected to a first oil pump.

4. The hydraulic swing motor according to claim 3, characterized in that, Oil outlet pipes (1008) are communicated with the outer sides of a pair of the guide pipes (1002), and the free ends of the oil outlet pipes (1008) are connected to a second oil pump through solenoid valves.

5. A hydraulic swing motor according to claim 1, characterized in that A bearing (2002) is installed inside the second housing (2001), and the inner ring of the bearing (2002) is installed on the outer side of the rotating shaft (2003).

6. A hydraulic swing motor according to claim 1, characterized in that, A connection port (2005) is arranged at the connection between the first housing (1001) and the second housing (2001), and the meshing part of the gear (2004) and the rack (1005) is located inside the connection port (2005).

7. A hydraulic swing motor according to claim 1, characterized in that, Both the first housing (1001) and the second housing (2001) are made of metal material.

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