Automobile electric power steering worm
By employing a retaining ring groove to fix the bearing and a flow guide tube structure in the electric power steering worm gear of automobiles, the coaxiality problem between the worm gear and the bearing is solved, self-lubrication is achieved, and the stability and service life of the system are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI KOAL AUTOMOBILE ACCESSORY CO LTD
- Filing Date
- 2024-12-23
- Publication Date
- 2026-04-10
AI Technical Summary
In existing automotive electric power steering systems, the poor coaxiality between the worm gear and the bearing leads to poor centering and guidance, a non-compact structure, and a tendency for axial movement. Furthermore, manual lubrication is required, and self-lubrication is not possible.
An electric power steering worm gear for automobiles was designed. It uses a snap ring groove to fix the bearing and combines a guide tube and a distributor structure to achieve automatic distribution and uniform distribution of lubricating oil. This ensures that the worm gear and the bearing are fixed as a whole, resulting in a compact structure. By providing a lubricating oil storage chamber inside the worm gear body, self-lubrication is achieved using centrifugal force.
It effectively prevents axial wear between the worm and the bearing, thus improving service life. Its compact structure and rigidity further enhance its service life. It also achieves self-lubrication of the worm, reducing the need for manual maintenance.
Smart Images
Figure CN224104141U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile parts, and particularly relates to an automobile electric power steering worm. BACKGROUND
[0002] The steering worm in the automobile electric power steering system is generally a light shaft worm, which is connected with the motor end by press fitting or a shaft coupling. Since the connecting parts are increased, the coaxiality is inevitably increased, and the centering and guiding are poor. In addition, the structure of the connecting mode is not compact, which causes the axial movement of the worm during movement, accelerates the wear of the parts, reduces the service life, and simultaneously, the existing automobile steering worm needs manual lubrication and cannot realize self-lubrication of the worm and the worm gear. SUMMARY
[0003] In view of the problems in the above background technology, the utility model aims to provide an automobile electric power steering worm to solve the problems in the above background technology.
[0004] To achieve the above technical purpose, the utility model adopts the following technical scheme:
[0005] An automobile electric power steering worm, comprising a worm body, a snap spring groove of a bearing is arranged on a connecting shaft at one end of the worm body, a snap spring is clamped in the snap spring groove, the snap spring abuts against one side of the bearing, a mounting groove and an assembly hole are sequentially arranged on a connecting shaft at the other end of the worm body, a storage cavity of lubricating oil is arranged in the worm body, a flow guide pipe is arranged on the head of the worm body and is communicated with the storage cavity, and an oil outlet hole is arranged on the tooth part of the worm body and is communicated with the storage cavity.
[0006] Further limitedly, the worm body comprises a tooth part, a first end part and a second end part, the tooth part is fixedly connected between the first end part and the second end part, the first end part is located at the upper end, the bearing is assembled and connected with the second end part, and the flow guide pipe is connected between the first end part and the tooth part.
[0007] Further limitedly, a flow dividing cylinder is fixedly and assembled connected in the storage cavity of the tooth part, a plurality of separation plates are uniformly fixedly connected in the flow dividing cylinder from top to bottom, a through hole for communicating the flow dividing cylinder is arranged in the middle part of the separation plate, and the oil outlet hole arranged on the tooth part is communicated with the flow dividing cylinder.
[0008] Further limitedly, an overflow pipe is fixedly connected above the through hole arranged on the flow dividing cylinder, and the overflow pipes adjacent in the up-down direction are staggered.
[0009] Further limitedly, the oil outlet holes arranged on the tooth part are located on the same line.
[0010] Further limited, one end of the flow guide pipe is located at the side wall of the first end.
[0011] Compared with the prior art, the utility model has the following advantages:
[0012] The worm of the utility model fixes the bearing by spring groove and spring, effectively prevents the axial mutual abrasion of the worm and the bearing during work, fixes the bearing and the worm as a whole, has more compact structure and better rigidity, and finally effectively reduces the mutual abrasion between components and prolongs the service life.
[0013] The utility model discloses a flow guide pipe makes lubricating oil enter the storage cavity, and the lubricating oil is lubricated to the worm gear through the oil outlet hole under the action of centrifugal force in the process that the worm rotates, and manual smearing of the worm is not needed, and the good meshing of the worm gear is kept.
[0014] The utility model discloses a flow guide pipe makes lubricating oil enter the storage cavity, and the lubricating oil is lubricated to the worm gear through the oil outlet hole under the action of centrifugal force in the process that the worm rotates, and manual smearing of the worm is not needed, and the good meshing of the worm gear is kept. BRIEF DESCRIPTION OF DRAWINGS
[0015] The utility model can be further illustrated by the non-limiting embodiment shown in the drawings.
[0016] Figure 1 It is a structural schematic diagram of the utility model of a kind of automobile electric power steering worm;
[0017] Figure 2 It is a structural schematic diagram of the utility model of a kind of automobile electric power steering worm bearing assembly structure;
[0018] Figure 3 It is a structural schematic diagram of the utility model of worm horizontal placement structure;
[0019] Figure 4 It is the explosion diagram of each component of the utility model;
[0020] Figure 5 It is a sectional view of the utility model of a kind of automobile electric power steering worm;
[0021] Figure 6 It is a structural schematic diagram of the utility model of shunt cylinder structure;
[0022] Figure 7 It is the sectional view of the utility model of shunt cylinder.
[0023] The main element symbols are explained as follows:
[0024] worm body 1, tooth part 101, first end part 102, second end part 103, circlip groove 11, mounting groove 13, storage cavity 14;
[0025] circlip 2;
[0026] bearing 3;
[0027] flow guide pipe 4;
[0028] shunt cylinder 5, separation plate 51. DETAILED DESCRIPTION
[0029] In order for those skilled in the art to better understand the utility model, the technical solutions of the utility model are further described below in combination with the drawings and examples.
[0030] As shown in Figure 1 An automobile electric power steering worm includes a worm body 1, a connecting shaft at one end of the worm body 1 is provided with a bearing circlip groove 11, a circlip 2 is clamped in the circlip groove 11, the circlip 2 abuts against one side of a bearing 3, a connecting shaft at the other end of the worm body 1 is sequentially provided with an assembly hole and a mounting groove 13, the inside of the worm body 1 is provided with a storage cavity 14 of lubricating oil, the head of the worm body 1 is provided with a flow guide pipe 4, and the tooth part of the worm body 1 is provided with an oil outlet hole communicating with the storage cavity 14.
[0031] The technical solutions of the embodiment are adopted, the circlip groove 11 is used for mounting the circlip 2, the circlip 2 is used for positioning one side of the bearing 3, the bearing is prevented from being deviated, the assembly hole is used for assembling the motor, the flow guide pipe 4 is used for providing lubricating oil in the storage cavity 14, the lubricating oil in the storage cavity 14 is discharged from the oil outlet hole, the lubricating oil in the flow guide pipe 4 is controlled to flow out at a fixed time and a fixed amount, thereby the oil amount in the storage cavity 14 is controlled, and the worm and gear are kept in a lubricated state.
[0032] Referring to Figure 1 and Figure 4 : the worm body 1 includes a tooth part 101, a first end part 102 and a second end part 103, the tooth part 101 is fixedly connected between the first end part 102 and the second end part 103, the first end part 102 is located at the upper end, the bearing 3 is assembled and connected with the second end part 103, and the flow guide pipe 4 is connected between the first end part 102 and the tooth part 101. In the embodiment, the lubricating oil enters the storage cavity 14 from the flow guide pipe 4, the flow guide pipe 4 is located at the upper part of the worm body 1, and the lubricating oil falls to the lower part of the storage cavity 14 under the action of its own gravity.
[0033] Referring to Figure 5The shunt cylinder 5 is fixedly connected in the storage cavity 14 of the tooth part 101, a plurality of separation plates 51 are uniformly and fixedly connected in the shunt cylinder 5 from top to bottom, a through hole for communicating the shunt cylinder 5 up and down is arranged in the middle of the separation plate 51, and the oil outlet hole of the tooth part 101 is communicated with the shunt cylinder 5. The shunt cylinder is arranged in the storage cavity 14, the lubricating oil is separated through the separation plate 51, and thus the liquid in the lower part of the storage cavity 14 is not subjected to the pressure of the lubricating oil above.
[0034] With reference to Figures 6-7 The overflow pipe 52 is fixedly connected above the through hole of the shunt cylinder 5, and the adjacent overflow pipes 52 in the up-down direction are staggered. In the embodiment, the overflow pipe 52 is fixedly connected above the through hole, when the lubricating oil reaches the height of the overflow pipe 52, the lubricating oil flows into the upper side of the next separation plate 51 from the overflow pipe 52, the flow of the lubricating oil flowing out of the flow guide pipe 4 is controlled, and thus the amount of the lubricating oil above each separation plate 51 is the same, the lubricating oil flowing out of the oil outlet holes in the same position as the height of the overflow pipe 52 is relatively uniform, and the oil outlet holes are located close to the upper side of the separation plate 51, and the lubricating oil can flow out of the oil outlet holes.
[0035] With reference to Figure 1 And Figure 5 The oil outlet holes of the tooth part 101 are located on the same line, and the position of the oil outlet hole is further limited in the embodiment.
[0036] With reference to Figure 5 The connecting position of the flow guide pipe 4 is further limited in the embodiment, and one end of the flow guide pipe 4 is located at the side wall of the first end part 102.
[0037] The above embodiments only exemplarily illustrate the principle and effect of the utility model, and are not used for limiting the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and category of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the utility model should be covered by the claims of the utility model.
Claims
1. A motorized power steering worm for a vehicle, comprising a worm body (1), characterized in that: The connecting shaft of one end of the worm body (1) is provided with a bearing snap spring groove (11), the snap spring groove (11) is provided with a snap spring (2), the snap spring (2) is in abutment with one side of the bearing (3), the connecting shaft of the other end of the worm body (1) is sequentially provided with an assembly hole and an installation groove (13), the inside of the worm body (1) is provided with a storage cavity (14) of lubricating oil, the head of the worm body (1) is provided with a flow guide pipe (4), and the tooth part of the worm body (1) is provided with an oil outlet hole in communication with the storage cavity (14).
2. The electric power assisted steering worm for a vehicle as set forth in claim 1, characterized by: The worm body (1) comprises a tooth part (101), a first end part (102) and a second end part (103), the tooth part (101) is fixedly connected between the first end part (102) and the second end part (103), the first end part (102) is located at the upper end, the bearing (3) is assembled and connected with the second end part (103), and the flow guide pipe (4) is connected between the first end part (102) and the tooth part (101).
3. The electric power assisted steering worm for a vehicle as set forth in claim 2, characterized by: The storage cavity (14) of the tooth part (101) is fixedly assembled and connected with a shunt cylinder (5), a plurality of separation plates (51) are fixedly and uniformly connected in the shunt cylinder (5) from top to bottom, a through hole for communicating the shunt cylinder (5) up and down is formed in the middle of the separation plate (51), and the oil outlet hole of the tooth part (101) is in communication with the shunt cylinder (5).
4. The electric power assisted steering worm for a vehicle as set forth in claim 3, characterized by: The shunt cylinder (5) is fixedly connected with overflow pipes (52) above the through hole, and the overflow pipes (52) adjacent in the up-down direction are staggered.
5. The electric power assisted steering worm for a vehicle as set forth in claim 3, wherein: The oil outlet holes of the tooth part (101) are located on the same line.
6. The automotive electric power assisted steering worm as defined in claim 1, wherein: One end of the flow guide pipe (4) is located at the side wall of the first end part (102).