CN211731534U - Electric power steering gear with anti-loosening structure - Google Patents
Electric power steering gear with anti-loosening structure Download PDFInfo
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- CN211731534U CN211731534U CN201921486577.2U CN201921486577U CN211731534U CN 211731534 U CN211731534 U CN 211731534U CN 201921486577 U CN201921486577 U CN 201921486577U CN 211731534 U CN211731534 U CN 211731534U
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Abstract
The utility model relates to a take anti loosening structure's electric power steering ware comprises gear box casing, lock nut, wave form gasket, ball, wave form gasket and rack housing from a left side to the right side in proper order. The utility model discloses electric power steering gear of loose structure is prevented in area simple structure easily realizes, and locking effect is better, and factor of safety is higher. The utility model discloses a dual mode, combined action increases lock nut's locking effect. Firstly, increase the wave form gasket in ball bearing both sides, prevent that lock nut is not hard up through the axial force that the wave form gasket produced after being compressed. Secondly, a circle of annular groove is added on the back of the locking nut, and a corresponding structure is designed on the shell. After the locking nut is screwed down, the annular groove of the nut is pressed and riveted at the position corresponding to the notch of the shell through the tool, the threaded connection of the nut is damaged, and the anti-loosening effect is achieved.
Description
Technical Field
The utility model relates to an electric power steering gear, concretely relates to take anti loosening structure's electric power steering gear.
Background
With the continuous development of technology, electric power steering has been applied in the automotive field. Compared with other forms of electric power steering devices, the belt type electric power steering device can provide higher power assistance.
The belt type electric power steering gear is characterized in that rotation is transmitted between an output shaft of a power assisting motor and a belt wheel of a ball screw through a belt, the belt wheel is tightly pressed on a screw nut of the ball screw, and radial fastening is guaranteed through the tension force of a tolerance ring. The rotation of the motor is transmitted to the ball screw belt wheel through the belt, and the ball screw belt wheel drives the ball screw to move along the axial direction, so that the wheels are driven to turn.
When the steering operation is performed, the ball screw provides rack output force and simultaneously generates force with the same magnitude on the screw nut without stopping reciprocating. Therefore, the reliability of the connection between the ball screw lock nut and the housing becomes important. The locking nut has not hard up risk after receiving alternating load for a long time, in case locking nut is not hard up, can cause the unable transmission of motor helping hand to ball, and the helping hand is inefficacy, causes the incident.
Disclosure of Invention
An object of the utility model is to the not enough of above-mentioned prior art, provide a take anti loosening structure's electronic power steering ware, solved the locking problem between ball and the rack casing.
The utility model aims at realizing through the following technical scheme:
an electric power steering gear with a locking structure sequentially comprises a gear box shell 1, a locking nut 4, a waveform gasket II 6, a ball screw 3, a waveform gasket I5 and a rack shell 2 from left to right.
The gear box shell 1 is connected with the rack shell 2 through bolts; the ball screw 3 and the waveform gasket I5 are both arranged in the rack shell 2, and the waveform gasket I5 is arranged between the left end face of the bearing 31 of the ball screw 3 and the rack shell 2; the wave-shaped gasket II 6 is arranged on the right end face of the bearing 31, and the locking nut 4 is fixed with the rack shell 2 through threads.
Furthermore, five threaded holes are formed in the rack housing 2, five through holes are formed in the gear box housing 1, and the gear box housing 1 is connected with the rack housing 2 through five bolts.
Further, a circle of annular groove 41 is formed in the back of the locking nut 4 around the axis of the nut, a notch 21 corresponding to the annular groove 41 is formed in the rack housing 2, and the notch 21 can be used for pressure riveting the annular groove 41 through a pressure riveting punch 72 arranged on the tool 7.
Further, a positioning structure 71 matched with the press riveting punch 72 is further arranged on the tool 7.
Further, the notch 21 is formed by combining a triangular blind hole and a rectangular blind hole.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses electric power steering gear of loose structure is prevented in area simple structure easily realizes, and locking effect is better, and factor of safety is higher. The utility model discloses a dual mode, combined action increases lock nut's locking effect. Firstly, increase the wave form gasket in ball bearing both sides, prevent that lock nut is not hard up through the axial force that the wave form gasket produced after being compressed. Secondly, a circle of annular groove is added on the back of the locking nut, and a corresponding structure is designed on the shell. After the locking nut is screwed down, the annular groove of the nut is pressed and riveted at the position corresponding to the notch of the shell through the tool, the threaded connection of the nut is damaged, and the anti-loosening effect is achieved.
Drawings
FIG. 1 is a cross-sectional view of an electric power steering apparatus of the present invention;
FIG. 2 is a side view of the electric power steering apparatus according to the present invention;
FIG. 3 is a front view of the ball screw lock nut of the present invention;
fig. 4 is a cross-sectional view of the ball screw lock nut of the present invention;
FIG. 5 is a partial cross-sectional view of the ring groove of the ball screw lock nut of the present invention;
FIG. 6 is an isometric view of a rack housing of the electric steering gear of the present invention;
fig. 7 the utility model discloses lock nut is pressed and is riveted frock axonometric chart.
In the drawing, 1, a gear box shell 2, a rack shell 3, a ball screw 4, a locking nut 5, a waveform gasket I6, a waveform gasket II 21, a notch 22, a shell threaded hole 31, a bearing 41, an annular groove 71, a positioning structure 72 and a riveting punch are arranged.
Detailed Description
The invention will be further described with reference to the following examples:
as shown in fig. 1-7, the electric power steering gear with the anti-loosening structure comprises a gear box shell 1, a lock nut 4, a wave-shaped gasket ii 6, a ball screw 3, a wave-shaped gasket i 5 and a rack shell 2 from left to right in sequence.
The ball screw 3 and the waveform gasket I5 are both arranged in the left side shell 2, and the waveform gasket I5 is arranged between the left end face of the bearing 31 of the ball screw 3 and the rack shell 2;
the wave-shaped gasket II 6 is arranged on the right end face of the bearing 31, and the locking nut 4 is fixed with the rack shell 2 through threads;
the gearbox shell 1 is connected with the rack shell 2 through five bolts, five threaded holes are formed in the rack shell 2, five through holes are formed in the gearbox shell 1, and the bolts are screwed into the threaded holes of the rack shell 2 from one side of the gearbox shell 1.
Further, the back of the locking nut 4 is provided with a circle of annular groove 41 around the axis of the nut, the rack housing 2 is provided with a notch 21 corresponding to the annular groove 41, the notch 21 is formed by combining a triangular blind hole and a rectangular blind hole, and the notch 21 can be riveted to the annular groove 41 through a riveting punch 72 arranged on the tool 7.
Further, a positioning structure 71 matched with the press riveting punch 72 is further arranged on the tool 7. The tool 7 is not a component of the electric power steering gear with the anti-loosening structure, is only used for realizing the press riveting of the nut annular groove, and understands the realization process of the press riveting of the nut annular groove. The implementation method is that after the tool 7 and the rack housing 2 are positioned through the positioning structure 71, downward pressure is applied to the upper surface of the tool 7 through a machine, the upper body moves downward, and the annular groove 41 is pressed and riveted through the pressing and riveting punch 72. After the pressure riveting is finished, the pressure of the upper surface is unloaded, and the upper surface is rebounded through the middle spring to rebound to the original position.
Installation process of the electric power steering gear with the anti-loosening structure:
1. installing a waveform gasket in the rack shell 2, then inserting the ball screw 3 into the rack shell 2, and installing a waveform gasket I5 between the left end face of the bearing 31 and the rack shell 2;
2. mounting a wave-shaped gasket II 6 on the right end face of the bearing 31, and then screwing the locking nut 4 with the rack shell 2 through threads;
3. an annular groove 41 is processed on the locking nut 4, and a gap 21 is formed on the rack shell 2; after the locking nut is screwed, the groove 41 on the locking nut is pressed and riveted at the position of the shell notch 21 through a pressing and riveting punch head on the tool;
4. the tool 7 is provided with a positioning structure 71 and a riveting punch 72, and the positioning structure 71 is matched with the threaded hole 22 of the shell, so that accurate positioning is realized, and the damage of the riveting punch 72 to the shell in the riveting process is avoided;
5. after the locking nut 4 is screwed down, the wave-shaped gasket I5 and the wave-shaped gasket II 6 are extruded and deformed, so that the ball screw 3 is prevented from moving left and right in the shell; and provides outward force for the locking nut 4, and plays a role in preventing looseness by matching with the pressure riveting deformation of the locking nut 4.
Claims (5)
1. The utility model provides a take anti loosening structure's electric power steering gear which characterized in that: the gear box comprises a gear box shell (1), a locking nut (4), a waveform gasket II (6), a ball screw (3), a waveform gasket I (5) and a rack shell (2) from left to right in sequence;
the gear box shell (1) is connected with the rack shell (2) through bolts; the ball screw (3) and the waveform gasket I (5) are both arranged in the rack shell (2), and the waveform gasket I (5) is arranged between the left end surface of a bearing (31) of the ball screw (3) and the rack shell (2); the wave-shaped gasket II (6) is installed on the right end face of the bearing (31), and the locking nut (4) is fixed with the rack shell (2) through threads.
2. The electric power steering with the anti-loosening structure according to claim 1, characterized in that: the rack gear box is characterized in that five threaded holes are formed in the rack shell (2), five through holes are formed in the gear box shell (1), and the gear box shell (1) is connected with the rack shell (2) through five bolts.
3. The electric power steering with the anti-loosening structure according to claim 1, characterized in that: the back of the locking nut (4) is provided with a circle of annular groove (41) around the axis of the nut, the rack shell (2) is provided with a notch (21) corresponding to the annular groove (41), and the notch (21) can be pressed and riveted on the annular groove (41) through a pressing and riveting punch (72) arranged on the tool (7).
4. The electric power steering with the anti-loosening structure according to claim 3, characterized in that: and the tool (7) is also provided with a positioning structure (71) matched with the pressure riveting punch (72).
5. The electric power steering with the anti-loosening structure according to claim 3, characterized in that: the notch (21) is formed by combining a triangular blind hole and a rectangular blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921486577.2U CN211731534U (en) | 2019-09-09 | 2019-09-09 | Electric power steering gear with anti-loosening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921486577.2U CN211731534U (en) | 2019-09-09 | 2019-09-09 | Electric power steering gear with anti-loosening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211731534U true CN211731534U (en) | 2020-10-23 |
Family
ID=72849455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921486577.2U Active CN211731534U (en) | 2019-09-09 | 2019-09-09 | Electric power steering gear with anti-loosening structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211731534U (en) |
-
2019
- 2019-09-09 CN CN201921486577.2U patent/CN211731534U/en active Active
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