Oil-immersed steering gear

Abstract

To provide an oil-immersed steering gear that prevents wear of the gear, ensures a stable output speed, extends a service life of the steering gear, and does not generate abnormal noise even when used for a long period.SOLUTION: An oil-immersed steering gear comprises a housing assembly. In the housing assembly, a control chamber and an oil-immersed chamber are provided separately. The oil-immersed chamber is filled with liquid gear oil. In the control chamber, a control plate is housed. The control plate is provided with a motor and a potentiometer. An output end of the motor is drivingly connected to an output shaft of the potentiometer by a gear drive unit. The gear drive unit is positioned within the oil-immersed chamber and immersed in the liquid gear oil. The output shaft rotates through the oil-immersed chamber, and extends outside the housing assembly.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to the technical field of steering gears, and more particularly to oil-immersed steering gears. [Background technology]

[0002] The steering gear is the driver of the position (angle) servo, and constantly changes and maintains the angle. Currently, it is used in airplanes, submarine models, remote controlled robots, etc. It is widely used in various fields, such as high-end remote control toys such as bots.

[0003] A typical steering gear mainly consists of a reduction gear set, a position feedback potentiometer, The output shaft of the steering gear is The control circuit board is connected to the feedback potentiometer and receives the control signal from the signal line. The IC in the control circuit board receives the signal and drives the motor to rotate, which in turn drives a series of gears. After driving the gear set and slowing it down, the power is transmitted to the output steering wheel, and while the steering wheel is rotating, It drives a position feedback potentiometer, which is used for feedback. The control circuit board outputs a voltage signal to the motor to control the rotation direction and Determine the rotation speed and stop the target.

[0004] In a conventional steering gear, the reduction gear set is generally located in an enclosed room, and the reduction gear Each gear in the set is meshed with a spur gear to increase the rotation speed of the steering gear and steer In order to prevent damage to the ring gear, the reduction gear assembled in the steering gear is generally Grease is applied to the tooth surface of each gear to form a film of lubricating oil on the tooth surface of each gear, and the meshing parts are This ensures that the gears are in a fluid lubricated state, preventing friction and wear between the gears. The amount of grease applied to the ring gear is limited, so the steering After the gears have been in operation for a period of time, the grease dries out and the gears wear out, causing the steering gear to become loose. This reduces the force speed, affects the service life of the steering gear, and in severe cases can cause abnormal noise. To live.

[0005] Therefore, the inventor is working on designing a steering gear that solves the above problems. Summary of the Invention

[0006] The objective of the present invention is to provide a noiseless oil pump with stable output speed and extended service life. To provide a submerged steering gear.

[0007] To achieve the above objectives, the technical solutions adopted in the present invention are as follows:

[0008] An oil-immersed steering gear having a housing assembly, A control chamber and an oil-immersed chamber are provided separately in the assembly, and the oil-immersed chamber is filled with liquid gear oil; A control board is housed in the control chamber, and a motor and a potentiometer are provided on the control board; The output end of the motor is drivingly connected to the output shaft of a potentiometer by a gear drive unit. The gear drive unit is located in an oil immersion chamber and is immersed in liquid gear oil. The shaft rotates through an oil-immersed chamber and extends outside the housing assembly.

[0009] As an improvement to the oil-immersed steering gear of the present invention, an output end surface of the housing assembly is provided with An oil injection hole is provided, the oil injection hole is connected to the oil immersion chamber, and a sealing screw is sealed in the oil injection hole. It is set up as follows.

[0010] As an improvement of the oil-immersed steering gear of the present invention, the side of the housing assembly is provided with the An oil drain hole communicating with the oil immersion chamber is provided, and a transparent oil viewing cover is provided and sealed on the oil drain hole. It is being done.

[0011] As an improvement of the oil-immersed steering gear of the present invention, the oil-immersed chamber and the control chamber are individually aligned in a row. The housing assembly includes an upper cover, an intermediate case, and a lower cover. the upper cover is provided on the upper part of the intermediate case in a sealed manner to form an oil immersion chamber; The lower cover is sealingly mounted to the bottom of the intermediate case to define the control chamber.

[0012] In an improvement of the oil-immersed steering gear of the present invention, the motor is located in a control room, An input shaft is provided at the output end of the motor, and both the input shaft and the motor are mounted in a housing assembly. Sealed connection.

[0013] As an improvement of the oil-immersed steering gear of the present invention, the end face of the motor is provided with a motor seal ring. a housing assembly having an outer portion of the input shaft and an outer portion of the input shaft sealingly connected to the housing assembly by a motor oil lug; A lubricant seal is provided to seal the housing assembly.

[0014] As an improvement of the oil-immersed steering gear of the present invention, the gear drive unit has a first stage and a second stage. Gears, 2nd stage helical gear sets, 3rd stage helical gear sets, 4th stage helical gear sets and a fifth stage helical gear, the first stage helical gear being on an input shaft, the fifth stage helical gear is on the output shaft, and the first stage helical gear is in turn connected to the second stage helical gear set, the third stage helical gear set, The fourth stage helical gear set drives the fifth stage helical gear.

[0015] As an improvement of the oil-immersed steering gear of the present invention, a second stage is provided between the output shaft and the input shaft. A fourth stage gear shaft is provided, and the second stage and fourth stage gear shafts are located in the oil immersion chamber and have two ends. are rotatably connected to the first bearing and the housing assembly, and the second bearing and the The first and fourth helical gear sets are all attached to the second and fourth gear shafts. Located.

[0016] As an improvement to the oil-immersed steering gear of the present invention, a positioning portion is provided at the bottom of the oil-immersed chamber. The first stage helical gear is positioned in the positioning portion, and the helical teeth of the first stage helical gear are positioned. the third stage helical gear set is disposed on a third stage gear shaft, and the third stage teeth The axle is arranged coaxially with the positioning portion, and one end of the third stage gear shaft is fitted to one third bearing. the other end of the third stage gear shaft is rotatably connected to the housing assembly by The third bearing is fitted to the outside of the positioning portion and is rotatably connected to the positioning portion by a third bearing. .

[0017] As an improvement of the oil-immersed steering gear of the present invention, the potentiometer is located in the control chamber. and both ends of the output shaft are rotatably connected to the housing assembly by fourth bearings. The output shaft is connected to the housing adapter via an output shaft oil seal at each end. The assembly is hermetically connected.

[0018] Compared with the prior art, the oil-immersed steering gear of the present invention has a gear drive unit in an oil-immersed chamber. By immersing it in liquid gear oil, the meshing parts of the gear drive unit are kept in a fluid lubricated state for a long period of time. This avoids gear wear, ensures a stable output speed, and extends the service life of the steering gear. Even if the number is increased and the device is used for a long period of time, no abnormal noise will be generated. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a three-dimensional view of the oil-immersed steering gear of the present invention. [Diagram 2] FIG. 2 is a three-dimensional exploded view of the oil-immersed steering gear of the present invention. [Diagram 3] FIG. 2 is another exploded view of the oil-immersed steering gear of the present invention. [Figure 4] 1 is an enlarged cross-sectional view of an oil-immersed steering gear according to the present invention.

[0020] 1, lower cover; 2, intermediate case; 21, sealing material; 22, positioning part; 3, upper cover ;31, oil filling hole;311, sealing screw;312, sealing ring;32, oil sight glass bar; 321, oil peep seal ring; 322, oil drain hole; 4, control plate; 41, motor ;411, motor oil seal; 412, motor seal ring; 42, potentiometer ;43, sealing screw cap;5, input shaft;51, first stage helical gear;6, second stage and fourth stage gear shaft; 61, second stage helical gear; 62, second stage coaxial helical gear; 63, fourth stage helical gear; 64, fourth stage coaxial helical gear; 65, first bearing; 7, third stage gear shaft; 71, 3rd stage helical gear; 72, 3rd stage coaxial helical gear; 73, 2nd bearing; 74, 3rd bearing; 8 , output shaft; 81, 5th stage helical gear; 82, 4th bearing; 83, output shaft oil seal; 84 , output gear. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It is for the purpose of clarity and is not intended to limit the scope of protection of the present invention.

[0022] 1 to 4, the oil-immersed steering gear includes a housing assembly, a control plate, 4, a motor 41, a potentiometer 42 and a gear drive unit, A control chamber and an oil-immersed chamber are provided separately in the assembly, and the oil-immersed chamber is filled with liquid gear oil. The chamber contains a control board 4, on which a motor 41 and a potentiometer 42 are mounted. The output end of the motor 41 is connected to the output shaft 8 of the potentiometer 42 via a gear drive unit. The gear drive unit is located in an oil immersion chamber and is immersed in liquid gear oil. The output shaft rotates through the oil-immersed chamber and extends outside the housing assembly.

[0023] Referring to FIG. 2 to FIG. 4, the housing assembly includes a bottom cover 1, an intermediate case 2, and a top cover 3, the top of the bottom cover 1 is concave and is secured to the center by four fastening screws. The bottom cover 1 is fixed to the intermediate case 2, and a seal material 21 is provided in the groove of the lid mating surface of the bottom cover 1. The bottom cover 1 is provided on the bottom of the intermediate case 2 in a sealed manner by the seal material 21. The control chamber is formed by the intermediate case 2, which is located between the bottom cover 1 and the top cover 3. The bottom of the case 2 is recessed to form a mounting panel at the top of the intermediate case 2. Another seal material 21 is provided in the groove of the mating surface of the upper cover 3. The oil immersion chamber is formed by sealing the oil immersion chamber at the top of the intermediate case 2. The positioning portion 22 extends vertically outwardly. The positioning portion 22 is annular and has a cutout on its side. The overall positioning portion 22 is located in the oil immersion chamber and protrudes from the bottom of the oil immersion chamber. The second bearing 73 is fitted outside the positioning portion 22, and the bottom of the upper cover 3 is recessed to accommodate four fixed bearings. It is fixedly connected to the intermediate case 2 by a screw, and the user can easily inject liquid gear oil into the oil immersion chamber. In order to prevent this, the output end surface of the upper cover 3 (i.e., the top of the upper cover 3) is provided with an oil immersion chamber. An oil filling hole 31 is provided which communicates with the oil immersion chamber, and the user can fill the oil filling hole 31 with an appropriate amount of oil. The gear oil is poured into the oil pouring hole 31, and the oil pouring hole 31 is sealed by a seal ring 312 and a sealing screw 311. The sealing screw 311 is provided to prevent the liquid gear oil in the oil immersion chamber from overflowing. An oil discharge hole 322 communicating with the oil immersion chamber is further provided on the side of the upper cover 3. The oil drain hole 322 is used to drain the liquid gear oil used in the oil immersion chamber. The oil drain hole 322 is sealed by the oil viewing cover 32 with the oil viewing oil seal 321. The oil level indicator is provided to allow the user to easily see the amount of liquid gear oil being poured in and the amount of accumulated oil in the oil immersion chamber. In addition, the oil viewing cover 32 is transparent.

[0024] 2 to 4, the oil immersion chamber and the control chamber are arranged vertically in a line, i.e., The immersion chamber is located directly below the control chamber, and the control panel 4, motor 41, and potentiometer 42 are all The control board 4 is fixed to the bottom of the control room, and the motor 41 is mounted perpendicular to the control board 4. and electrically connected to the control board 4. The input shaft 5 is coaxially connected to the output shaft of the motor 41. Both the input shaft 5 and the motor 41 are hermetically connected to the intermediate case 2. The output shaft of the motor 41 can be sealedly connected to the intermediate case 2, and the case end face of the motor 41 The motor 41 according to the present invention has an end face on which a motor The motor 41 has a case end face that is fitted with a motor seal ring 412. The input shaft 5 is sealed to the intermediate case 2 by a seal 411. The motor oil is inserted into the oil immersion chamber through the mounting panel of the intermediate case 2 and is then inserted into the oil immersion chamber. The input shaft 5 is fitted with a motor oil seal 411, and the input shaft 5 is fitted with a motor oil seal 411. The input shaft 5 is entirely located within the positioning portion 22 and is sealed to the mounting panel. The meter 42 is fixed to the intermediate case 2 and located above the control plate 4. is mounted at a distance from the motor 41, and the potentiometer 42 is electrically connected to the control board 4. The output shaft 8 is coaxially positioned and installed on the output shaft of the potentiometer 42. The input shaft 5 is provided with a gap therebetween, and the lower end of the output shaft 8 is the input end, and the upper end of the output shaft 8 is the output end. The output shaft 8 rotates and extends outside the upper cover 3 through the intermediate case 2 and the oil immersion chamber. Specifically, the input end and the output end of the output shaft 8 are provided with output shaft oil seals 8 along the axial direction. The third and fourth bearings 82 are fitted in an overlapping manner, and the two fourth bearings 82 are fitted in two output shaft oil seals. 83, and the input end of the output shaft 8 is rotatably connected to the intermediate case 2 by the lower fourth bearing 82. The input end of the output shaft 8 is connected to the intermediate case 2 by a lower output shaft oil seal 83. The output end of the output shaft 8 is rotatably connected to the upper cover 3 by a fourth bearing 82 above. The output end of the output shaft 8 is sealed and connected to the upper cover 3 by an upper output shaft oil seal 83. In order to connect the control board 4 to the power supply, the side walls of the intermediate case 2 are further provided with a wire for threading. An opening is provided, and a sealing screw cap 43 is provided to seal the opening. do.

[0025] 2 to 4, the gear drive unit may be composed of a spur gear, bevel gear The gear drive unit of the present invention may be composed of a bevel gear, The gear drive unit includes a first stage helical gear 51, a second stage helical gear set, and a third stage helical gear set. A wheel set, a fourth stage helical gear set, and a fifth stage helical gear 81, of which the fifth stage The helical gear 81 is located on the output shaft 8, the first stage helical gear 51 is a second stage helical gear set, The third helical gear set and the fourth helical gear set are passed in order to the fifth helical gear 81. The first stage helical gear 51 is coaxially mounted on the input shaft 5 and positioned within the positioning portion 22. A part of the first stage helical gear 51 is inserted into the notch on the side surface of the positioning portion 22. A second stage and a fourth stage gear shaft 6 are provided between the output shaft 8 and the input shaft 5. The second and fourth stage gear shafts 6 are located in the oil chamber, and the second and fourth stage gear shafts 6 are provided with first bearings 6 at both ends. The upper ends of the second and fourth stage gear shafts 6 are attached to the upper cover 3 by the upper first bearings 65. The lower ends of the second and fourth stage gear shafts 6 are supported intermediately by the lower second bearing 73. The second stage helical gear set and the fourth stage helical gear set are both rotatably connected to the case 2. These are also located on the second and fourth stage gear shafts 6, and the second stage helical gear set is the second stage helical gear 6 1 and a second stage coaxial helical gear 62, and a second stage coaxial helical gear 61 and a second stage coaxial helical gear 6 2 are coaxial gears, both of which are fitted on the same second and fourth stage gear shaft 6, and the second stage is helical. The gear 61 is located below the second stage coaxial helical gear 62. The second stage helical gear 61 is located below the first stage The third stage helical gear set is arranged coaxially with the positioning portion 22. A third bearing 74 is fitted to the tip of the third stage gear shaft 7, and the inner ring of the third bearing 74 is The third gear shaft 7 is fixedly connected to the upper cover 3, and the tip of the third gear shaft 7 is rotatably connected to the upper cover 3 by a third bearing 74. The third stage includes a third stage helical gear 71 and a third stage coaxial helical gear 72. The helical gear 72 and the third stage helical gear 71 are fitted to the third stage gear shaft 7 and are aligned in the same direction as the third stage gear shaft 7. The third stage helical gear 71 is fitted to the outside of the second bearing 73. The third stage helical gear 71 is rotatably connected to the positioning portion 22 by a second bearing 73, and the third stage helical gear 71 The fourth stage helical gear set is meshed with the second stage coaxial helical gear 62, and the fourth stage helical gear set is meshed with the fourth stage helical gear 6 The third and fourth stage coaxial helical gears 64 include a bevel gear at the lower end of the fourth stage coaxial helical gear 64. A fourth stage coaxial helical gear 64 is provided, and the entire fourth stage coaxial helical gear 64 is aligned with the upper end of the second stage and fourth stage gear shaft 6. The inner ring of the first bearing 65 and the fourth stage helical gear 63 are coaxially formed. The fourth stage helical gear 63 is fixedly fitted to the upper end of the helical gear 64 in order from the top. The fourth stage helical gear 63 is located above the third stage helical gear 64. 72, and the fifth stage helical gear 81 is fitted to the output shaft 8. The fifth stage helical gear 81 is The fourth stage coaxial helical gear 64 meshes with the helical gear, and the output end of the output shaft 8 is provided with an output gear 84. is further provided, and the output gear 84 is located outside the upper cover 3.

[0026] Referring to FIG. 1 to FIG. 4, the operation principle of the oil-immersed steering gear of the present invention is as follows: .

[0027] The motor 41 controls the rotation of the input shaft 5, which drives the rotation of the first stage helical gear 51. , the first stage helical gear 51 drives the rotation of the second stage helical gear 61, and the second stage coaxial helical gear 62 is a third stage helical gear, and the second stage coaxial helical gear 62 rotates synchronously with the second stage helical gear 61. The third stage coaxial helical gear 72 drives the rotation of the third stage helical gear 71. Accordingly, the third stage coaxial helical gear 72 drives the rotation of the fourth stage coaxial helical gear 64, The fourth stage coaxial helical gear 64 rotates synchronously with the fourth stage helical gear 63. drives the rotation of the fifth stage helical gear 81, which in turn drives the rotation of the output shaft 8, and the output gear 84 With the rotation of the output shaft 8, the rotation of the steering wheel is controlled and the potentiometer 42 is driven. The potentiometer 42 controls the motor 41 via the control board 4. Control the direction and speed of rotation to stop the target.

[0028] Referring to FIG. 1 to FIG. 4, the oil injection method of the oil-immersed steering gear of the present invention is as follows. do.

[0029] Open the sealing screw 311 directly and inject an appropriate amount of liquid gear oil into the oil immersion chamber through the oil injection hole 31. At the same time, the amount of liquid gear oil in the oil immersion chamber was observed through the oil observation cover 32. Inject an appropriate amount of liquid gear oil into the oil immersion chamber, and stop injecting oil until each helical gear is immersed. Then, the oil injection hole 31 is sealed and closed using the sealing screw 311 to prevent the liquid gear oil in the oil immersion chamber from Prevent overflow.

[0030] Referring to FIG. 1 to FIG. 4, the oil change method of the oil-immersed steering gear of the present invention is as follows. do.

[0031] When the user removes the oil viewing cover 32 directly, the liquid gear oil used in the oil immersion chamber is The oil can be poured out from the oil outlet hole 322, and the oil observation cover 32 is closed and the sealing screw 311 is tightened. When opened, liquid gear oil can be poured in through the oil filling hole 31.

[0032] The oil-immersed steering gear of the present invention has the following beneficial technical effects.

[0033] (1) A gear transmission unit is installed in the oil immersion chamber, and multiple helical gears are used to transmit the power. Improve the accuracy of tearing gear.

[0034] (2) Each helical gear is immersed in the liquid gear oil in the oil immersion chamber, and the meshing parts of the gear drive unit are flushed. By maintaining the lubrication condition for a long time, it prevents gear wear and ensures a stable output speed. This extends the service life of the steering gear and prevents noise even after long-term use.

[0035] (3) Each gear shaft is rotatably connected to the housing assembly by a bearing, and is sensitive to the effects of temperature The temperature of each gear shaft rises with the rotation of the helical gear, and even if the gear shaft expands due to heat, The gear shaft also does not exhibit the locking phenomenon.

[0036] (4) The mounting panel of the intermediate case 2 separates the inside of the case assembly, separating the oil immersion chamber and the control chamber. The motor 41, the potentiometer 42 and the control plate 4 are tightly separated from the gear drive unit. A seal is installed to enhance the waterproof performance of the entire steering gear.

[0037] (5) By providing an oil injection hole 31 in the upper cover 3, liquid gear oil can be injected into the oil immersion chamber. The oil viewing cover 32 makes it easy to pour in the gear oil, and the liquid gear oil in the oil immersion chamber can be easily observed. The amount of liquid gear oil injected must be checked at all times. If the amount of liquid gear oil injected does not reach the hydrodynamic lubrication conditions, the gears may become unstable. Prevents friction and wear.

[0038] The above disclosure is merely a preferred embodiment of the present invention, and is not intended to limit the protection scope of the present invention. Therefore, equivalent modifications made in accordance with the scope of the present invention are not permitted. However, it is still within the scope of the present invention.

Claims

1. An oil-immersed steering gear, A housing assembly is provided, and a control chamber and an oil immersion chamber are individually disposed in the housing assembly. a control plate is accommodated in the control chamber; and The control plate is provided with a motor and a potentiometer, and the output end of the motor is connected to a gear drive unit. The gear drive unit is connected to the output shaft of the potentiometer by a gear. The output shaft rotates through the oil-immersed chamber and is immersed in liquid gear oil. extends outside the ring assembly, The motor is located in the control chamber, and an input shaft is provided at an output end of the motor. Both of said motors are hermetically connected to said housing assembly; The gear drive unit includes a first stage helical gear, a second stage helical gear set, a third stage helical gear set, a wheel set, a fourth stage helical gear set and a fifth stage helical gear, The fifth stage helical gear is on the input shaft, the fifth stage helical gear is on the output shaft, and the first stage helical gear is on the second stage The fifth stage is made up of a second stage helical gear set, a third stage helical gear set, and a fourth stage helical gear set. Drive connection to helical gear, A positioning portion is provided at the bottom of the oil immersion chamber, and the first stage helical gear is The third stage helical gear set is located at the position where the helical gear is exposed to the positioning portion. The third stage gear shaft is disposed coaxially with the positioning portion, and the third stage gear shaft is disposed coaxially with the positioning portion. One end of the third stage gear shaft is rotatably connected to the housing assembly by a third bearing. The other end of the third stage gear shaft is fitted to the outside of the positioning portion and is also fitted to another third bearing. and rotatably connected to the positioning portion. An oil-immersed steering gear.

2. An oil injection hole communicating with the oil immersion chamber is provided on the output end surface of the housing assembly, 2. The oil immersion type according to claim 1, characterized in that a sealing screw is provided in the oil injection hole to seal it. Steering gear.

3. An oil drain hole communicating with the oil immersion chamber is provided on a side surface of the housing assembly, 2. The oil supply device according to claim 1, wherein a transparent oil viewing cover is provided and sealed on the outlet hole. Oil-immersed steering gear.

4. The oil immersion chamber and the control chamber are individually arranged in a line, and the housing assembly is A cover, an intermediate case, and a lower cover, the upper cover being attached to the upper part of the intermediate case. The lower cover is sealed to the bottom of the intermediate case to form an oil immersion chamber.

2. The oil-immersed steering system of claim 1, further comprising a control chamber. gear.

5. An end face of the motor is sealingly connected to the housing assembly by a motor seal ring. an outer portion of the input shaft is sealed to the housing assembly by a motor oil seal; 5. The oil-immersed steering gear according to claim 4, further comprising:

6. A second stage and a fourth stage gear shaft are provided between the output shaft and the input shaft, and the second stage and the fourth stage gear shafts are provided between the output shaft and the input shaft. The axle is located in the oil-immersed chamber and its two ends are respectively connected to the first bearing and the housing assembly. wherein the second stage helical gear set and the fourth stage helical gear set are rotatably connected by and are all located on the second and fourth stage gear shafts, respectively. Steering gear.

7. The potentiometer is located in the control chamber, and both ends of the output shaft are respectively mounted on fourth bearings. the housing assembly is rotatably connected to the output shaft, and both ends of the output shaft are a shaft oil seal sealingly connected to the housing assembly; Item 2. An oil-immersed steering gear according to item 1.

Images