Steering gear for automotive EPS

Abstract

The application provides a steering gear for automobile EPS and relates to the technical field of steering gears, which comprises a shell, a lubricating adding mechanism is arranged on one side of the shell, a supporting shell is arranged at the bottom of the shell, a shaft rod is rotatably arranged in the shell, a gear rod is fixedly connected to the bottom end of the shaft rod, a cross rod is slidably arranged on the inner wall of the supporting shell, and gear teeth are arranged on one side of the cross rod. When the gear rod needs to be injected with lubricant, the control valve is in an open state, the electric telescopic rod is retracted, the lubricant is discharged from the nozzle, the lubricant is in a colloidal shape, the lubricant is smeared on the gear rod, the lubricant on the gear rod moves downward under the action of gravity, the lubricant is soaked on the gear teeth when the lubricant flows to the gear teeth, and finally the gear teeth and the gear rod are coated with the lubricant, so that the abrasion between the gear teeth and the gear rod is reduced.

Description

Technical Field

[0001] This invention relates to the field of steering gear technology, and more particularly to a steering gear for automotive EPS. Background Technology

[0002] However, in existing technologies, with the development of technology, there are more and more steering gear products available. Among them, EPS type steering gears are the most widely used. Steering gears for EPS angle zero-position alignment belong to a type of EPS steering gear. In use, this type of steering gear is light at high speeds and stable at low speeds, providing a good feel. However, it is not suitable for some dry places. When used in particularly dry environments, the lubricant between the shaft and the crossbar in the steering gear will change with temperature and usage time. Prolonged use will lead to a significant reduction in lubricant, which in turn reduces the lubrication between the shaft and the crossbar. This results in severe wear at the meshing point of the shaft and the crossbar when the shaft rotates, reducing the product's service life. Therefore, a steering gear for automotive EPS is needed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies. With the development of technology, there are increasingly more steering gear products available, among which EPS (Electric Power Steering) type steering gears are the most widely used. Steering gears for EPS angle zero-position alignment are a type of EPS steering gear. These steering gears offer good feel, being light at high speeds and stable at low speeds. However, they are not suitable for dry environments. In particularly dry conditions, the lubricant between the shaft and crossbar in the steering gear changes with temperature and usage time. Prolonged use leads to a significant reduction in lubricant, resulting in decreased lubrication between the shaft and crossbar. This causes severe wear at the meshing point of the shaft and crossbar during rotation, reducing the product's lifespan.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a steering gear for automotive EPS, comprising a housing, a lubrication adding mechanism disposed on one side of the housing, a support shell disposed at the bottom of the housing, a shaft rotatably disposed inside the housing, a gear fixedly connected to the bottom end of the shaft, a crossbar slidably disposed on the inner wall of the support shell, teeth disposed on one side of the crossbar, the teeth meshing with the gear, a bearing disposed on the inner bottom surface of the housing, a rotating rod fixedly connected to the inner wall of the bearing, the top end of the rotating rod fixedly connected to the bottom end of the gear, the lubrication adding mechanism comprising a hydraulic tank, a curved tube fixedly connected to the bottom end of the hydraulic tank, two connecting pipes fixedly connected to one end of the curved tube, a control valve disposed inside the connecting pipe, one end of the connecting pipe fixedly penetrating into the interior of the housing, a nozzle fixedly connected to one end of the connecting pipe, a flexible plate fixedly sleeved on the outer surface of the nozzle, and a brush fixedly disposed on one side of the flexible plate.

[0005] In a preferred embodiment, a piston plate is slidably connected to the inner wall of the hydraulic tank, and a piston sleeve is fixedly fitted onto the outer surface of the piston plate.

[0006] The beneficial effect of adopting the above-mentioned further solution is that the lubricant inside the hydraulic tank can be discharged from the nozzle through the piston plate and piston sleeve.

[0007] In a preferred embodiment, two slide rods are fixedly connected to the top of the piston plate, and the top ends of the slide rods slide through to the top of the hydraulic tank. A connecting plate is fixedly connected between the top ends of the two slide rods, and two electric telescopic rods are fixedly installed at the bottom of the connecting plate.

[0008] The beneficial effect of adopting the above-mentioned further solution is that the movement of the piston plate can be better controlled by the electric telescopic rod, so as to facilitate the movement of the piston plate.

[0009] In a preferred embodiment, a first mounting shell is fixedly installed on the outer surface of the electric telescopic rod, and one side of the first mounting shell is fixedly connected to one side of the hydraulic tank.

[0010] The beneficial effect of adopting the above-mentioned further solution is that the electric telescopic pole can be fixed by the first mounting shell, thereby increasing the structural stability of the electric telescopic pole.

[0011] In a preferred embodiment, a support plate is provided between one side of the two connecting pipes, the top of the support plate is fixedly connected to the bottom of the outer shell, the bottom of the support plate is fixedly connected to the top of the support shell, and a second mounting shell is fixedly connected to the outer surface of the connecting pipe, with one side of the second mounting shell fixedly connected to one side of the support plate.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the connecting pipe can be supported and fixed by the second mounting shell, thereby increasing the structural stability of the connecting pipe.

[0013] In a preferred embodiment, a fixing hole is provided on one side of the support plate, and a support rod is fixedly connected to the inner wall of the fixing hole. Both ends of the support rod are fixedly connected to fixing plates, and one side of the fixing plate is fixedly connected to one side of the hydraulic tank.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the hydraulic tank can be supported and fixed by the fixing plate and the support rod, thereby increasing the structural stability of the hydraulic tank.

[0015] In a preferred embodiment, a storage mechanism is provided on the top of the support shell. The storage mechanism includes a base, a storage box is fixedly connected to the top of the base, a box cover is provided on the top of the storage box, a mounting base is fixedly connected to one side of the storage box, and a transfer pump is fixedly connected to the inner wall of the mounting base.

[0016] The beneficial effects of adopting the above-mentioned further solutions are: the base can support the storage tank, while the mounting base can better support the transfer pump, thereby increasing the structural stability of the equipment.

[0017] In a preferred embodiment, the input end of the transfer pump is fixedly connected to a first fixed pipe, one end of which is fixedly inserted into the interior of the storage tank. The output end of the transfer pump is fixedly connected to a second fixed pipe, and the top end of the second fixed pipe is fixedly connected to a one-way valve. The top end of the one-way valve is fixedly connected to the bottom of the hydraulic tank.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the one-way valve can prevent the lubricant inside the hydraulic tank from entering the interior of the second fixed pipe, thereby increasing the sealing effect to a certain extent.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0020] 1. In this invention, when lubricant needs to be injected into the rack, the control valve is open and the electric telescopic rod retracts, eventually discharging the lubricant from the nozzle. The lubricant is in a colloidal form and is gradually applied to the rack. Under the influence of gravity, the lubricant on the rack moves downwards little by little. When the lubricant flows onto the teeth, it soaks into them, ultimately ensuring that both the teeth and the rack are covered with lubricant, thus reducing wear between them.

[0021] 2. In this invention, when the lubricant inside the hydraulic tank is insufficient, the control valve is in a closed state. At this time, the lubricant inside the storage tank is brought into the check valve through the first fixed pipe and the second fixed pipe by the transfer pump. The check valve can only flow upward. When the transfer pump is turned on, the electric telescopic rod rises slowly, which allows the lubricant inside the storage tank to enter the hydraulic tank. Attached Figure Description

[0022] Figure 1 A perspective view of a steering gear for an automotive EPS is provided by the present invention;

[0023] Figure 2 This invention provides a partial sectional perspective view of the support housing and outer casing of a steering gear for an automotive EPS.

[0024] Figure 3 This invention provides a perspective view of the lubrication addition mechanism of a steering gear for an automotive EPS (Electric Power Steering) device;

[0025] Figure 4 A perspective cross-sectional view of the hydraulic tank of a steering gear for an automobile EPS is provided for the present invention.

[0026] Figure 5 This invention provides a perspective view of the structure of the nozzle of a steering gear for an automotive EPS (Electric Power Steering) device;

[0027] Figure 6 This invention provides a perspective view of the structure of the second mounting housing of a steering gear for an automobile EPS.

[0028] Legend:

[0029] 1. Housing; 2. Lubrication addition mechanism; 3. Storage mechanism; 4. Support housing; 5. Shaft; 6. Gear rack; 7. Crossbar; 8. Tooth; 9. Bearing; 10. Rotating rod;

[0030] 21. Hydraulic tank; 22. Curved tube; 23. Connecting pipe; 24. Control valve; 25. Nozzle; 26. Flexible plate; 27. Brush; 28. Support plate; 29. ​​Support rod; 210. Fixing plate; 211. Slide rod; 212. Connecting plate; 213. Electric telescopic rod; 214. First mounting shell; 215. Piston plate; 216. Piston sleeve; 217. Second mounting shell;

[0031] 31. Base; 32. Storage tank; 33. Tank cover; 34. Mounting base; 35. Transfer pump; 36. First fixed pipe; 37. Second fixed pipe; 38. Check valve. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 1-6 As shown, the present invention provides a technical solution: a steering gear for automotive EPS, including a housing 1, a lubrication adding mechanism 2 provided on one side of the housing 1, a support shell 4 provided at the bottom of the housing 1, a shaft 5 rotatably provided inside the housing 1, a rack 6 fixedly connected to the bottom end of the shaft 5, a crossbar 7 slidably provided on the inner wall of the support shell 4, teeth 8 provided on one side of the crossbar 7, teeth 8 meshing with the rack 6, a bearing 9 provided on the inner bottom surface of the housing 1, a rotating rod 10 fixedly connected to the inner wall of the bearing 9, the top end of the rotating rod 10 fixedly connected to the bottom end of the rack 6, the lubrication adding mechanism 2 including a hydraulic tank 21, a curved tube 22 fixedly connected to the bottom end of the hydraulic tank 21, two connecting pipes 23 fixedly connected to one end of the curved tube 22, a control valve 24 provided inside the connecting pipe 23, and one end of the connecting pipe 23 fixedly penetrating the housing. Inside the hydraulic tank 21, a nozzle 25 is fixedly connected to one end of the connecting pipe 23. A flexible plate 26 is fixedly sleeved on the outer surface of the nozzle 25. A brush 27 is fixedly installed on one side of the flexible plate 26. A piston plate 215 is slidably connected to the inner wall of the hydraulic tank 21. A piston sleeve 216 is fixedly sleeved on the outer surface of the piston plate 215. The lubricant inside the hydraulic tank 21 can be discharged from the nozzle 25 through the piston plate 215 and the piston sleeve 216. Two sliding rods 211 are fixedly connected to the top of the piston plate 215. The top of the sliding rods 211 slides through to the top of the hydraulic tank 21. A connecting plate 212 is fixedly connected between the tops of the two sliding rods 211. Two electric telescopic rods 213 are fixedly installed at the bottom of the connecting plate 212. The movement of the piston plate 215 can be better controlled by the electric telescopic rods 213 to facilitate the movement of the piston plate 215.

[0035] In this embodiment, the system is used according to the dryness of the weather and the duration of steering. During use, when lubricant needs to be injected into the rack 6, the control valve 24 is open, and the electric telescopic rod 213 retracts. The retraction of the electric telescopic rod 213 moves the connecting plate 212, which in turn moves the piston plate 215. The piston plate 215 then moves the piston sleeve 216. At this time, the pressure near the bottom of the hydraulic tank 21 decreases due to the piston plate 215 and piston sleeve 216. The lubricant stored in the hydraulic tank 21 then enters the curved tube 22 and subsequently the two connecting pipes 23. Meanwhile, the control valve 24 remains open. Finally, the lubricant will be discharged from the nozzle 25. Since the lubricant is in colloidal form, it will be on the outer surface of the flexible plate 26 and will be absorbed by the brush 27 under gravity. When the shaft 5 rotates, it will drive the rack 6 to rotate. The rack 6 will rotate between the brushes 27, and the brushes 27 will brush the rack 6 with oil. At this time, the lubricant will be applied to the rack 6 little by little. The lubricant on the rack 6 will move downward little by little under the action of gravity. When the lubricant flows to the teeth 8, it will be absorbed by the teeth 8. Finally, the teeth 8 and the rack 6 will be covered with lubricant to reduce the wear between the teeth 8 and the rack 6.

[0036] Example 2

[0037] like Figure 3-5 As shown, a first mounting shell 214 is fixedly installed on the outer surface of the electric telescopic rod 213. One side of the first mounting shell 214 is fixedly connected to one side of the hydraulic tank 21. The electric telescopic rod 213 can be fixed through the first mounting shell 214, increasing the structural stability of the electric telescopic rod 213. A support plate 28 is provided between one side of the two connecting pipes 23. The top of the support plate 28 is fixedly connected to the bottom of the outer shell 1, and the bottom of the support plate 28 is fixedly connected to the top of the support shell 4. A second mounting shell 217 is fixedly connected to the outer surface of the connecting pipe 23. One side of the second mounting shell 217 is fixedly connected to one side of the support plate 28. The second mounting shell 217 can support and fix the connecting pipe 23, increasing the structural stability of the connecting pipe 23. A fixing hole is opened on one side of the support plate 28, and a support rod 29 is fixedly connected to the inner wall of the fixing hole. Both ends of the support rod 29 are fixedly connected to fixing plates 210. One side of the fixing plate 210 is fixedly connected to one side of the hydraulic box 21. The hydraulic box 21 can be supported and fixed through the fixing plate 210 and the support rod 29, increasing the structural stability of the hydraulic box 21.

[0038] In this embodiment, during use, the electric telescopic rod 213 can be fixed by the first mounting shell 214, making the structure of the electric telescopic rod 213 stable. The second mounting shell 217 can be fixed by the support plate 28, thereby fixing the connecting pipe 23 by the second mounting shell 217. The support plate 28 is fixed to the support shell 4 and the outer shell 1, making the structure of the support plate 28 more stable. The hydraulic tank 21 is fixed by the support rod 29 and the support plate 28, thereby making the structure of the hydraulic tank 21 more stable.

[0039] Example 3

[0040] like Figure 1-3 As shown, a storage mechanism 3 is provided on the top of the support shell 4. The storage mechanism 3 includes a base 31, a storage box 32 is fixedly connected to the top of the base 31, a box cover 33 is provided on the top of the storage box 32, a mounting base 34 is fixedly connected to one side of the storage box 32, and a transfer pump 35 is fixedly connected to the inner wall of the mounting base 34. The base 31 can support the storage box 32, and the mounting base 34 can better support the transfer pump 35, increasing the structural stability of the equipment. The input end of the transfer pump 35 is fixedly connected to a first fixed pipe 36, one end of the first fixed pipe 36 is fixedly inserted into the interior of the storage box 32, and the output end of the transfer pump 35 is fixedly connected to a second fixed pipe 37. A one-way valve 38 is fixedly connected to the top end of the second fixed pipe 37, and the top end of the one-way valve 38 is fixedly connected to the bottom of the hydraulic tank 21. The one-way valve 38 can prevent the lubricant inside the hydraulic tank 21 from entering the interior of the second fixed pipe 37, increasing the sealing effect to a certain extent.

[0041] In this embodiment, when the lubricant inside the hydraulic tank 21 is insufficient, the control valve 24 is closed. At this time, the lubricant inside the storage tank 32 is brought into the check valve 38 through the first fixed pipe 36 and the second fixed pipe 37 by the transfer pump 35. The check valve 38 can only flow upward. When the transfer pump 35 is turned on, the electric telescopic rod 213 rises slowly, allowing the lubricant inside the storage tank 32 to enter the hydraulic tank 21.

[0042] Working principle:

[0043] like Figure 1-6As shown, the operation is based on the dryness of the weather and the duration of steering gear use. During use, when the rack 6 needs lubricant injection, the control valve 24 is open, and the electric telescopic rod 213 retracts. The retraction of the electric telescopic rod 213 moves the connecting plate 212, which in turn moves the piston plate 215, which in turn moves the piston sleeve 216. At this time, the pressure near the bottom of the hydraulic tank 21 is reduced by the piston plate 215 and the piston sleeve 216. The lubricant stored in the hydraulic tank 21 then enters the curved tube 22 and subsequently the two connecting pipes 23. Meanwhile, the control valve 24 is open, and the lubricant is finally discharged from the nozzle 25. Since the lubricant is in gel form, it remains on the outer surface of the flexible plate 26 and, by gravity, adheres to the brush 27. When the shaft 5 rotates, it will... The rotating gear 6 rotates between the brushes 27, which then apply lubricant to the gear 6. The lubricant on the gear 6 is gradually applied by the brushes 27, and under gravity, it moves downwards. When the lubricant reaches the teeth 8, it coats them, reducing wear between them. When the lubricant in the hydraulic tank 21 is insufficient, the control valve 24 is closed. The transfer pump 35 then pumps the lubricant from the storage tank 32 through the first fixed pipe 36 and the second fixed pipe 37 to the check valve 38. The check valve 38 only allows upward flow. When the transfer pump 35 is activated, the electric telescopic rod 213 slowly rises, allowing the lubricant from the storage tank 32 to enter the hydraulic tank 21.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A steering gear for automotive EPS, comprising a housing (1), characterized in that: A lubrication adding mechanism (2) is provided on one side of the outer shell (1). A support shell (4) is provided at the bottom of the outer shell (1). A shaft (5) is rotatably provided inside the outer shell (1). A gear (6) is fixedly connected to the bottom end of the shaft (5). A crossbar (7) is slidably provided on the inner wall of the support shell (4). A tooth (8) is provided on one side of the crossbar (7). The tooth (8) meshes with the gear (6). A bearing (9) is provided on the inner bottom surface of the outer shell (1). A rotating rod (10) is fixedly connected to the inner wall of the bearing (9). The top end of the rotating rod (10) is connected to the gear (6). The bottom end is fixedly connected. The lubrication adding mechanism (2) includes a hydraulic tank (21). The bottom end of the hydraulic tank (21) is fixedly connected to a curved tube (22). One end of the curved tube (22) is fixedly connected to two connecting tubes (23). A control valve (24) is provided inside the connecting tube (23). One end of the connecting tube (23) is fixedly penetrated into the interior of the outer shell (1). One end of the connecting tube (23) is fixedly connected to a nozzle (25). A flexible plate (26) is fixedly sleeved on the outer surface of the nozzle (25). A brush (27) is fixedly provided on one side of the flexible plate (26). The inner wall of the hydraulic tank (21) is slidably connected to a piston plate (215), and a piston sleeve (216) is fixedly sleeved on the outer surface of the piston plate (215). Two slide rods (211) are fixedly connected to the top of the piston plate (215). The top of the slide rods (211) slides through to the top of the hydraulic tank (21). A connecting plate (212) is fixedly connected between the tops of the two slide rods (211). Two electric telescopic rods (213) are fixedly installed at the bottom of the connecting plate (212). The outer surface of the electric telescopic rod (213) is fixedly mounted with a first mounting shell (214), and one side of the first mounting shell (214) is fixedly connected to one side of the hydraulic tank (21). A support plate (28) is provided between one side of the two connecting pipes (23). The top of the support plate (28) is fixedly connected to the bottom of the outer shell (1), and the bottom of the support plate (28) is fixedly connected to the top of the support shell (4). A second mounting shell (217) is fixedly connected to the outer surface of the connecting pipe (23). One side of the second mounting shell (217) is fixedly connected to one side of the support plate (28). A fixing hole is provided on one side of the support plate (28), and a support rod (29) is fixedly connected to the inner wall of the fixing hole. Both ends of the support rod (29) are fixedly connected to a fixing plate (210), and one side of the fixing plate (210) is fixedly connected to one side of the hydraulic box (21).

2. The steering gear for an automobile EPS according to claim 1, characterized in that: The top of the support shell (4) is provided with a storage mechanism (3), the storage mechanism (3) includes a base (31), the top of the base (31) is fixedly connected to a storage box (32), the top of the storage box (32) is provided with a box cover (33), a mounting base (34) is fixedly connected to one side of the storage box (32), and a transfer pump (35) is fixedly connected to the inner wall of the mounting base (34).

3. A steering gear for an automotive EPS according to claim 2, characterized in that: The input end of the transfer pump (35) is fixedly connected to a first fixed pipe (36), one end of which is fixedly inserted into the interior of the storage tank (32). The output end of the transfer pump (35) is fixedly connected to a second fixed pipe (37), and the top end of the second fixed pipe (37) is fixedly connected to a one-way valve (38). The top end of the one-way valve (38) is fixedly connected to the bottom of the hydraulic tank (21).

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