CN214985617U - End surface internal circulation ball type electric power steering gear - Google Patents
End surface internal circulation ball type electric power steering gear Download PDFInfo
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- CN214985617U CN214985617U CN202121033307.3U CN202121033307U CN214985617U CN 214985617 U CN214985617 U CN 214985617U CN 202121033307 U CN202121033307 U CN 202121033307U CN 214985617 U CN214985617 U CN 214985617U
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Abstract
The utility model discloses an electronic power assisted steering ware of terminal surface inner loop circulation ball formula relates to commercial car technical field, include: the steering gear comprises a steering gear shell assembly, a side cover assembly, a speed reducer assembly, an input shaft assembly, a motor and controller assembly, a rocker arm shaft assembly, an upper shaft sleeve assembly, a ball screw assembly and a lower shaft sleeve assembly. The ball screw assembly includes: ball screw, ball nut, reverser, steel ball, and pressing plate. One end of the ball screw is connected with the input shaft assembly through a torsion bar, the ball nut is sleeved on the ball screw, the steel ball is arranged in a rolling path of the ball screw and the ball nut to transmit torque, and circularly enters the rolling path through the reverser, the rolling path of the reverser is tangent to the rolling path formed by combining the ball screw and the ball nut, the reversers are clamped in the ball nut, one end of each reverser is one, and the two reversers are fixed on the ball nut through a pressing plate. The utility model provides an outer loop structure pipe problem of easily becoming invalid, noise reduction, life-span has certain spreading value.
Description
Technical Field
The utility model relates to an electronic power assisted steering field specifically is an electronic power assisted steering ware of terminal surface inner loop ball formula, becomes the output torque of rocking arm axle through the ball screw is vice with the output torque of motor.
Background
The existing circulating ball type electric power steering gear basically changes the output torque of a motor into the output torque of a rocker shaft through a ball screw pair, a gear sector rack pair mechanism is used for transmitting the torque from the ball screw pair to the rocker shaft, the resistance of the rocker shaft can generate a larger radial component force when the rocker shaft rotates, a part for circulating steel balls is a guide pipe, the thickness of the wall of the guide pipe cannot be too large due to the limitation of a product structure, and when the steel balls move into a reverse guide pipe from a stressed state in a raceway, a certain impact force can be generated, the impact force acts on the reverse guide pipe, water drops and stones penetrate, and the service life of the steering gear cannot be reached if the structural design and the strength design of the reverse guide pipe are unreasonable. The fact also proves that the ball screw pair of the recirculating ball type electric power steering gear fails because the ball screw pair is stuck due to the deformation and the breakage of the reverse guide pipe in the large part, the product fails, the design life of the product cannot be reached, and safety accidents can be caused.
Disclosure of Invention
An object of the utility model is to provide an end surface inner loop circulation ball formula electric power steering to solve the problem that provides in the above-mentioned technical background.
The technical scheme of the utility model is that: the utility model provides an electronic power assisted steering ware of terminal surface inner loop circulation ball formula which the structure includes inner loop ball screw assembly, its characterized in that: the ball screw assembly is characterized in that a ball nut (13) is sleeved on a ball screw (11), a steel ball (15) is arranged in a roller path formed by combining the ball screw (11) and the ball nut (13) to transmit torque and circularly enters the roller path through an reverser (14), the roller path of the reverser (14) is tangent to the roller path formed by combining the ball screw (11) and the ball nut (13), the reversers (14) are clamped in the ball nut (13), one end and two ends are fixed on the ball nut (13) through pressing plates (12), ball screw bearings (19) are pressed at two ends of the ball screw (11) in the ball screw assembly, an upper shaft sleeve assembly (16) is sleeved at the long end of the ball screw (11) in the ball screw assembly, the long end of the ball screw (11) in the ball screw assembly is connected with an input shaft assembly (6) through a torsion bar, and the upper shaft sleeve assembly (16) is fixed with a steering gear shell assembly (1) through threads, the steering gear comprises a steering gear shell assembly (1), a speed reducer assembly (5) and a motor and controller assembly (7), wherein the speed reducer assembly (5) is connected with the motor and controller assembly (7) through a coupler and a bolt, the short end of a ball screw (11) in the ball screw assembly is sleeved with a lower shaft sleeve assembly (10), the lower shaft sleeve assembly (10) is connected with the steering gear shell assembly (1) through threads and adjusts the clearance of a ball screw bearing (19), the lower shaft sleeve assembly is fixed with the steering gear shell assembly (1) through a lower shaft sleeve locking nut (9), a rocker arm shaft bearing (17) is arranged in the steering gear shell assembly (1) in a pressing mode, the rocker arm shaft bearing (17) is sleeved with a rocker arm shaft assembly (8), a sector on the rocker arm shaft assembly (8) and a rack on the ball nut (13) form a sector rack pair (18), and the rocker arm shaft assembly (8) is connected with an adjusting screw (2), adjusting screw (2) pass through the screw thread and be connected with side cap assembly (4), side cap assembly (4) pass through the bolt and be connected and fixed with steering gear shell assembly (1), side cap assembly (4) middling pressure be equipped with rocking arm shaft bearing (17), rocking arm shaft bearing (17) cup joint rocking arm shaft assembly (8) in order to do benefit to its rotation, adjusting screw (2) adjust the clearance of well sector rack pair (18) after fixed with adjusting screw lock nut (3) and side cap assembly (4).
Preferably, the raceway of the reverser (14) is tangent to the raceway combined by the ball screw (11) and the ball nut (13);
preferably, the reversers (14) are snapped into the ball nut (13), one at each end, for a total of two.
Preferably, the reverser (14) is formed by powder metallurgy of high-density alloy iron powder.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses in the ball screw is vice, replace the intubate extrinsic cycle with the terminal surface inner loop, with the reverser (see figure 4) and need not reverse pipe to the possibility of circulating ball formula electric power steering ware inefficacy has been reduced.
The utility model discloses among the ball screw pair, the reverser intensity of design is high, and the joint groove on ball nut is processed easily, has reduced ball nut's the processing degree of difficulty.
The utility model discloses in the ball screw is vice, the reverser raceway of design is tangent in the raceway that ball and ball nut make up, and the impulsive force that produces when making the ball outflow ball and the raceway that ball nut make up as far as possible is used in another steel ball to reduce the impact, noise reduction, increase of service life.
The utility model discloses in the ball screw is vice, the reverser is installed at ball nut both ends, compact structure, and occupation space is little to the installation space of automobile inner part has been increased.
Drawings
Fig. 1 is a three-dimensional schematic diagram of the overall appearance structure of the present invention.
Figure 2 is a three-dimensional schematic drawing of the present invention with the diverter housing and motor and controller assembly removed and the ball nut cut open.
FIG. 3 is a three-dimensional schematic view of a ball screw assembly with a ball nut broken away.
Fig. 4 is a three-dimensional schematic view of the space in which two reversers are installed in a ball screw assembly.
Wherein: 1-a steering gear shell assembly, 2-an adjusting screw, 3-an adjusting screw locking nut, 4-a side cover assembly, 5-a speed reducer assembly, 6-an input shaft assembly, 7-a motor and controller assembly, 8-a rocker shaft assembly, 9-a lower shaft sleeve locking nut, 10-a lower shaft sleeve assembly, 11-a ball screw, 12-a pressing plate, 13-a ball nut, 14-an inverter, 15-a steel ball, 16-an upper shaft sleeve assembly, 17-a rocker shaft bearing, 18-a sector rack pair and 19-a ball screw bearing.
Detailed Description
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings 1-4. The specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
The utility model provides a technical scheme: the utility model provides an electronic power assisted steering ware of terminal surface inner loop circulation ball formula which the structure includes inner loop ball screw assembly, its characterized in that: the ball screw assembly is characterized in that a ball nut (13) is sleeved on a ball screw (11), a steel ball (15) is arranged in a roller path formed by combining the ball screw (11) and the ball nut (13) to transmit torque and enters the roller path again through an reverser (14), the roller path of the reverser (14) is tangent to the roller path formed by combining the ball screw (11) and the ball nut (13), the reversers (14) are clamped in the ball nut (13), one end and two ends are fixed on the ball nut (13) through pressing plates (12), ball screw bearings (19) are pressed at two ends of the ball screw (11) in the ball screw assembly, an upper shaft sleeve assembly (16) is sleeved at the long end of the ball screw (11) in the ball screw assembly, the long end of the ball screw (11) in the ball screw assembly is connected with an input shaft assembly (6) through a torsion bar, and the upper shaft sleeve assembly (16) is fixed with a steering gear shell assembly (1) through threads, the steering gear comprises a steering gear shell assembly (1), a speed reducer assembly (5) and a motor and controller assembly (7), wherein the speed reducer assembly (5) is connected with the motor and controller assembly (7) through a coupler and a bolt, the short end of a ball screw (11) in the ball screw assembly is sleeved with a lower shaft sleeve assembly (10), the lower shaft sleeve assembly (10) is connected with the steering gear shell assembly (1) through threads and adjusts the clearance of a ball screw bearing (19), the lower shaft sleeve assembly is fixed with the steering gear shell assembly (1) through a lower shaft sleeve locking nut (9), a rocker arm shaft bearing (17) is arranged in the steering gear shell assembly (1) in a pressing mode, the rocker arm shaft bearing (17) is sleeved with a rocker arm shaft assembly (8), a sector on the rocker arm shaft assembly (8) and a rack on the ball nut (13) form a sector rack pair (18), and the rocker arm shaft assembly (8) is connected with an adjusting screw (2), adjusting screw (2) pass through the screw thread and be connected with side cap assembly (4), side cap assembly (4) pass through the bolt and be connected and fixed with steering gear shell assembly (1), side cap assembly (4) middling pressure be equipped with rocking arm shaft bearing (17), rocking arm shaft bearing (17) cup joint rocking arm shaft assembly (8) in order to do benefit to its rotation, adjusting screw (2) adjust the clearance of well sector rack pair (18) after fixed with adjusting screw lock nut (3) and side cap assembly (4).
The utility model discloses work flow: the steering wheel is connected with an input shaft assembly (6) on the circulating ball type electric power steering gear through a transmission shaft, forward and reverse steering torques applied to the steering wheel are transmitted to the input shaft assembly (6) through the transmission shaft, the torsion bar is twisted and deformed by the rotation of the input shaft, so that the sensor is driven to generate corresponding signals and transmit the signals to the controller, the controller sends signals to the motor after operation, the motor works to generate corresponding forward and reverse steering torques, the steering torques of the motor are transmitted to the ball screw (11) through the reducer assembly (5), the steering torques of the ball screw (11) are transmitted to the ball nut (13) in the ball screw pair through the steel ball, so that the ball nut (13) is driven to reciprocate up and down, the up and down reciprocating motion of the ball nut (13) drives the sector rack pair (18) to rotate forward and backward, so that the rocker shaft assembly (8) is driven to rotate forward and backward, and the steering arm of the automobile, the vertical arm swings back and forth along with the vertical arm, and therefore the left and right steering of the automobile is achieved.
Claims (4)
1. The utility model provides an electronic power assisted steering ware of terminal surface inner loop circulation ball formula which the structure includes inner loop ball screw assembly, its characterized in that: the ball screw assembly is characterized in that a ball nut (13) is sleeved on a ball screw (11), a steel ball (15) is arranged in raceways of the ball screw (11) and the ball nut (13) to transmit torque and circularly enters the raceways through an inverter (14), the raceways of the inverter (14) are tangent to the raceways formed by the ball screw (11) and the ball nut (13), the inverters (14) are clamped in the ball nut (13), one end and two ends are fixed on the ball nut (13) through a pressing plate (12), ball screw bearings (19) are arranged at two ends of the ball screw (11) in the ball screw assembly in a pressing mode, a long end of the ball screw (11) in the ball screw assembly is sleeved with an upper shaft sleeve assembly (16), the long end of the ball screw (11) in the ball screw assembly is connected with an input shaft assembly (6) through a torsion bar, and the upper shaft sleeve assembly (16) is fixed with a steering gear shell assembly (1) through threads, the steering gear comprises a steering gear shell assembly (1), a speed reducer assembly (5) and a motor and controller assembly (7), wherein the speed reducer assembly (5) is connected with the motor and controller assembly (7) through a coupler and a bolt, the short end of a ball screw (11) in the ball screw assembly is sleeved with a lower shaft sleeve assembly (10), the lower shaft sleeve assembly (10) is connected with the steering gear shell assembly (1) through threads and adjusts the clearance of a ball screw bearing (19), the lower shaft sleeve assembly is fixed with the steering gear shell assembly (1) through a lower shaft sleeve locking nut (9), a rocker arm shaft bearing (17) is arranged in the steering gear shell assembly (1) in a pressing mode, the rocker arm shaft bearing (17) is sleeved with a rocker arm shaft assembly (8), a sector on the rocker arm shaft assembly (8) and a rack on the ball nut (13) form a sector rack pair (18), and the rocker arm shaft assembly (8) is connected with an adjusting screw (2), adjusting screw (2) pass through the screw thread and be connected with side cap assembly (4), side cap assembly (4) pass through the bolt and be connected and fixed with steering gear shell assembly (1), side cap assembly (4) middling pressure be equipped with rocking arm shaft bearing (17), rocking arm shaft bearing (17) cup joint rocking arm shaft assembly (8) in order to do benefit to its rotation, adjusting screw (2) adjust the clearance of well sector rack pair (18) after fixed with adjusting screw lock nut (3) and side cap assembly (4).
2. The end face internal circulation ball type electric power steering gear according to claim 1, characterized in that: the raceway of the reverser (14) is tangent to the raceway formed by combining the ball screw (11) and the ball nut (13).
3. The end face internal circulation ball type electric power steering gear according to claim 1, characterized in that: the reversers (14) are clamped in the ball nuts (13), and one end of each reverser is provided, and the reversers are two in total.
4. The end face internal circulation ball type electric power steering gear according to claim 1, characterized in that: the reverser (14) is formed by high-density alloy iron powder metallurgy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121033307.3U CN214985617U (en) | 2021-05-14 | 2021-05-14 | End surface internal circulation ball type electric power steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121033307.3U CN214985617U (en) | 2021-05-14 | 2021-05-14 | End surface internal circulation ball type electric power steering gear |
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| Publication Number | Publication Date |
|---|---|
| CN214985617U true CN214985617U (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121033307.3U Active CN214985617U (en) | 2021-05-14 | 2021-05-14 | End surface internal circulation ball type electric power steering gear |
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| CN (1) | CN214985617U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370484A (en) * | 2022-03-22 | 2022-04-19 | 天津德科智控股份有限公司 | Combined type reverser and ball screw nut device |
-
2021
- 2021-05-14 CN CN202121033307.3U patent/CN214985617U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370484A (en) * | 2022-03-22 | 2022-04-19 | 天津德科智控股份有限公司 | Combined type reverser and ball screw nut device |
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