CN221251417U - Signal steering gear with automatic centering function - Google Patents
Signal steering gear with automatic centering function Download PDFInfo
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- CN221251417U CN221251417U CN202322906776.7U CN202322906776U CN221251417U CN 221251417 U CN221251417 U CN 221251417U CN 202322906776 U CN202322906776 U CN 202322906776U CN 221251417 U CN221251417 U CN 221251417U
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- ball screw
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- steering gear
- screw nut
- pcb
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- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000006698 induction Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- IYZWUWBAFUBNCH-UHFFFAOYSA-N 2,6-dichlorobiphenyl Chemical compound ClC1=CC=CC(Cl)=C1C1=CC=CC=C1 IYZWUWBAFUBNCH-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Abstract
The utility model discloses a signal steering gear with an automatic centering function, which comprises a ball screw, a bearing seat, a screw rod nut, an elastic resetting device, a limit sliding rod, a sliding block, a speed reducer, a magnet mounting seat, a magnet, a PCB (printed circuit board) and a PCB mounting seat, wherein the ball screw is arranged on the bearing seat; the multi-turn rotary power of the external steering wheel is transmitted to the speed reducer through the ball screw, the multi-turn rotary motion is converted into single-turn internal rotation through the conversion of the speed reducer, the mechanical rotary motion is converted into electric signal output through the relative rotary motion of the magnet and the PCB, the rebound characteristic of the spring is utilized as a power source for returning, the ball screw nut is driven to linearly move back to the middle position, the ball screw is driven to rotate so that the magnet and the PCB relatively move, and a return signal is output. The signal steering gear with the automatic centering function is reasonable in structural arrangement, and angle signals adopt a non-contact magnetic induction technology, so that the signal steering gear has the advantages of no abrasion, no maintenance and high reliability.
Description
Technical Field
The utility model relates to the technical field of steering gears, in particular to a signal steering gear with an automatic centering function.
Background
In recent years, unmanned technology has been widely applied to specific engineering equipment and special vehicles (such as sanitation, agricultural machinery, mining vehicles and the like), and full-drive-by-wire technology has also been more widely applied. However, for special equipment or vehicles, a man-machine driving mode is still required to be reserved, namely, the man-machine driving is realized so as to realize the full coverage of the equipment or the vehicles in special occasions and working conditions.
The existing full-steer-by-wire has the advantages of quick response, high precision, simple installation and arrangement and the like, but the existing full-steer-by-wire has no mechanical or other interfaces, so that the existing full-steer-by-wire can only generally respond to electric signal instructions; or because of space or position constraints of the whole vehicle, the mechanical linkage transmission arrangement is very complex and difficult to achieve with the steering wheel of the cab. In addition, encoders or potentiometers and the like are used as steering command signal devices in the current market, but the steering command signal devices have no operation torque feedback and no automatic centering function, and the operation torque is small (light), so that the equipment and the vehicle have poor operation experience, and even the steering wheel swings along with the vibration or the swinging of the vehicle body due to the small operation torque, so that the safety risk exists. And because of the limitations of devices such as an encoder, a potentiometer and the like, the position of the device or the vehicle, which is turned on by the wire, needs to be recalibrated after the device or the vehicle is electrified every time, so that the program is complex, and the potential safety hazard is increased.
Disclosure of utility model
The utility model aims to provide a signal steering gear with an automatic centering function, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the utility model provides a signal steering gear with an automatic centering function, which comprises a ball screw, a bearing seat, a screw nut, an elastic resetting device, a limit sliding rod, a sliding block, a speed reducer, a magnet mounting seat, a magnet, a PCB and a PCB mounting seat; the two ends of the ball screw are respectively and rotatably arranged on the two bearing seats through bearings, the screw nut is arranged on the ball screw, and the two axial sides of the screw nut are respectively provided with an elastic reset device; the limiting sliding rods are arranged on two radial sides of the ball screw and are parallel to the ball screw, two ends of each limiting sliding rod are fixedly connected with the two bearing seats respectively, each limiting sliding rod is sleeved with one sliding block in a sliding manner, and the sliding blocks are fixedly connected with the screw nuts; one end of the ball screw is used for being connected with a steering wheel, the other end of the ball screw is in transmission connection with the input end of the speed reducer, the output end of the speed reducer is fixedly connected with the magnet mounting seat, the magnet is mounted on one side, far away from the speed reducer, of the magnet mounting seat, the PCB is adjacently arranged on one side of the magnet, and the PCB is fixedly mounted on the PCB mounting seat.
Further, the signal steering gear further comprises two limiting blocks sleeved on the ball screw, and the two limiting blocks are fixedly arranged on the inner sides of the two bearing seats respectively; the elastic reset device is arranged between the limiting block and the screw nut in a compression mode, namely, no matter the screw nut moves to any position, the elastic reset device is always in a compression state, and the limiting block also limits the elastic reset device to move in the radial direction of the ball screw.
Further, the elastic reset device is a reset spring, one end of the reset spring is sleeved on the limiting block and is fixedly connected with the limiting block, and the other end of the elastic reset device is fixedly connected with the screw nut.
Further, the number of the limiting sliding rods is two, the two limiting sliding rods are symmetrically arranged on two radial sides of the ball screw, and two ends of each limiting sliding rod penetrate through the two bearing seats respectively and are fixedly connected with the bearing seats through nuts.
Further, threads are arranged at two ends of the limiting sliding rod.
Further, the screw nut is fixedly connected with the sliding block through a connecting piece, a through hole for installing the screw nut and a first connecting hole for fixedly connecting with the screw nut are formed in a connecting plate of the connecting piece, and second connecting holes for connecting with the two sliding blocks are formed in two side plates of the connecting piece.
Further, the signal steering gear further comprises a first shell part arranged between the two bearing seats, a second shell part arranged between the bearing seats and the PCB mounting seat, and a third shell part fixedly connected with the outer side of the PCB mounting seat.
Compared with the prior art, the utility model has the following beneficial effects:
According to the signal steering gear with the automatic centering function, external multi-turn rotary power is transmitted to the speed reducer through the ball screw, the multi-turn rotary motion is converted into single-turn internal rotation through the conversion of the speed reducer, the mechanical rotary motion is converted into electric signal output through the relative rotary motion of the magnet and the PCB, the rebound characteristic of the spring is used as a centering power source for resetting, the ball screw nut is driven to linearly move back to the middle position, the ball screw is driven to rotate so that the magnet and the PCB relatively move, and a steering signal is output; the signal steering device is applied to an engineering-level linear chassis, so that the steering wheel has an automatic centering function and an operating force feedback function. The angle signal of the signal steering gear adopts a non-contact magnetic induction technology, and has the advantages of no abrasion, no maintenance, high reliability and the like.
In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The utility model will be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic view of a longitudinal cross-sectional structure along the length direction of a signal steering gear with an automatic centering function according to the present utility model;
FIG. 2 is a schematic perspective view of a signal steering gear with automatic centering function (the internal structure is shown) according to the present utility model;
The device comprises a 1-ball screw, a 2-bearing seat, a 3-screw nut, a 4-elastic resetting device, a 5-limit sliding rod, a 6-sliding block, a 7-speed reducer, an 8-magnet mounting seat, a 9-magnet, a 10-PCB (printed circuit board), an 11-limit block, a 12-nut, a 13-connecting piece, a 14-PCB mounting seat, a 15-first shell part, a 16-second shell part and a 17-third shell part.
Detailed Description
Embodiments of the utility model are described in detail below with reference to the attached drawings, but the utility model can be implemented in a number of different ways, which are defined and covered by the claims.
Referring to fig. 1 and 2, the present embodiment provides a signal steering gear with an automatic centering function, which includes a ball screw 1, a bearing seat 2, a screw nut 3, an elastic reset device 4, a limit sliding rod 5, a sliding block 6, a speed reducer 7, a magnet mounting seat 8, a magnet 9, a PCB board 10 and a PCB board mounting seat 14; the specific structure is as follows:
Two ends of the ball screw 1 are respectively rotatably arranged on the two bearing seats 2 through bearings, and two ends of the ball screw 1 respectively extend to the outer sides of the two bearing seats 2. The screw nut 3 is arranged on the ball screw 1, and an elastic resetting device 4 is respectively arranged at two axial sides of the screw nut 3; the limiting sliding rods 5 are arranged on at least one radial side of the ball screw 1, the limiting sliding rods 5 are parallel to the ball screw 1, two ends of each limiting sliding rod 5 are fixedly connected with the two bearing seats 2 respectively, a sliding block 6 is sleeved on each limiting sliding rod 5 in a sliding manner, and the sliding blocks 6 are fixedly connected with the screw nuts 3; the structure is characterized in that the rotation of the screw nut is limited by at least one limiting sliding rod fixed on the bearing seat, so that the screw nut can only move along the axial direction of the ball screw when the ball screw rotates. One end of the ball screw 1 is used for being connected with a steering wheel, the other end of the ball screw 1 is in transmission connection with the input end of the speed reducer 7, the output end of the speed reducer 7 is fixedly connected with the magnet mounting seat 8, the magnet 9 is mounted on one side, far away from the speed reducer 7, of the magnet mounting seat 8, the PCB 10 is adjacently arranged on one side of the magnet 9, and the PCB 10 is fixedly mounted on the PCB mounting seat 14. Specifically, the PCB board and the magnet are arranged in a non-contact way, the gap between the magnet and the PCB board is 1-3 mm, and the center of the shaft is aligned. When the magnet and the PCB rotate relatively, the angle detection is carried out by adopting a Giant Magnetoresistance (GMR) principle under the action of a rotating magnetic field, so that cosine signals and sine signals are generated under the action of the rotating magnetic field read by an induction chip on the PCB, and the PCB MCU carries out arithmetic processing such as arctangent and the like and then converts and outputs the electric signals.
In a specific embodiment, the signal steering gear further comprises two limiting blocks 11 sleeved on the ball screw 1, and the two limiting blocks 11 are fixedly arranged on the inner sides of the two bearing seats 2 respectively; the elastic resetting device 4 is arranged between the limiting block 11 and the screw nut 3 in a compressed mode, namely, no matter the screw nut 3 moves to any position, the elastic resetting device 4 is always in a compressed state, and the limiting block 11 also limits the elastic resetting device 4 to move in the radial direction of the ball screw 1. Specifically, the elastic reset device 4 is a reset spring, one end of the reset spring is sleeved on the limiting block 11 and is fixedly connected with the limiting block, and the other end of the elastic reset device 4 is fixedly connected with the screw nut 3. Those skilled in the art will appreciate that the greater the spring rate, the greater the force to feedback with the external steering wheel, and the less the force to feedback with the external steering wheel, for the same length of the return spring; under the condition that the elastic coefficients are the same, the length dimension has only the influence of the external dimension on the electric signal steering gear, and has no influence on the function.
In a specific embodiment, two limit sliding rods 5 are provided, the two limit sliding rods 5 are symmetrically arranged on two radial sides of the ball screw 1, and two ends of each limit sliding rod 5 respectively penetrate through two bearing seats 2 and are fixedly connected with the bearing seats 2 through nuts 12. Wherein both ends of the limit sliding rod 5 are provided with threads, and the structure is convenient for fixing the limit sliding rod with the bearing seat through nuts.
In a specific embodiment, the screw nut 3 is fixedly connected with the sliding blocks 6 through the connecting piece 13, a through hole for installing the screw nut and a first connecting hole for fixedly connecting with the screw nut are formed in the middle connecting plate of the connecting piece 13, and second connecting holes for connecting with the two sliding blocks 6 are formed in the two side plates of the connecting piece 13. The connecting piece 13 is fixedly connected with the screw nut 3 and the sliding block 6 respectively through bolts.
In a specific embodiment, the signal diverter further comprises a first housing part 15 arranged between the two bearing blocks 2, a second housing part 16 arranged between the bearing blocks 2 and the PCB board mounting seat 14, and a third housing part 17 arranged outside the PCB board mounting seat 14 and fixedly connected thereto. The casing portion that this structure set up is used for protecting the inner structure of signal steering gear, plays dampproofing, dirt-proof effect.
The working principle of the signal steering gear with the automatic centering function is as follows: the ball screw 1 is driven to rotate by the steering wheel, the sliding block 6 and the limiting sliding rod 5 enable the screw nut to be incapable of rotating and only capable of moving along the axial direction of the limiting sliding rod, the ball screw 1 rotates to drive the speed reducer 7 to rotate, the speed reducer converts multiple-turn rotation of the steering wheel into single-turn rotation, and the chassis steering is realized through converting the magnet 9 and the serial number PCB 10 into electric signal output. The ball screw 1 rotates to enable the sliding block 6 to slide on the limiting sliding rod, after the steering wheel rotates to a certain number of turns, the screw nut 2 on the ball screw 1 can prop against the limiting block 11, so that the ball screw 1 is limited to rotate, a reset spring can be compressed in the rotating process of the ball screw 1, the reset spring can rebound automatically after being compressed, the screw nut is driven to enable the ball screw 1 to rotate reversely, and the ball screw 1 is enabled to return to the initial middle position.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The signal steering gear with the automatic centering function is characterized by comprising a ball screw (1), a bearing seat (2), a screw nut (3), an elastic resetting device (4), a limit sliding rod (5), a sliding block (6), a speed reducer (7), a magnet mounting seat (8), a magnet (9), a PCB (10) and a PCB mounting seat (14); the two ends of the ball screw (1) are respectively rotatably arranged on the two bearing seats (2) through bearings, the screw nut (3) is arranged on the ball screw (1), and the elastic reset devices (4) are respectively arranged on the two axial sides of the screw nut (3); the limiting sliding rods (5) are arranged on two radial sides of the ball screw (1), the limiting sliding rods (5) are parallel to the ball screw (1), two ends of each limiting sliding rod (5) are fixedly connected with two bearing seats (2) respectively, each limiting sliding rod (5) is sleeved with one sliding block (6) in a sliding mode, and the sliding blocks (6) are fixedly connected with a screw nut (3) connecting piece; one end of ball screw (1) is used for being connected with the steering wheel, the other end of ball screw (1) with the input transmission of speed reducer (7) is connected, the output of speed reducer (7) with magnet mount pad (8) fixed connection, magnet (9) are installed magnet mount pad (8) are kept away from one side of speed reducer (7), PCB board (10) are adjacent to be set up one side of magnet (9), PCB board (10) fixed mounting is in on PCB board mount pad (14).
2. The signal steering gear according to claim 1, further comprising two limiting blocks (11) sleeved on the ball screw (1), wherein the two limiting blocks (11) are fixedly arranged on the inner sides of the two bearing seats (2) respectively; the elastic reset device (4) is arranged between the limiting block (11) and the screw nut (3) in a compressed mode, namely, the elastic reset device (4) is always in a compressed state and the limiting block (11) also limits the elastic reset device (4) to move radially through the ball screw (1) no matter the screw nut (3) moves to any position.
3. The signal steering gear according to claim 2, wherein the elastic reset device (4) is a reset spring, one end of the reset spring is sleeved on the limiting block (11) and is fixedly connected with the limiting block, and the other end of the elastic reset device (4) is fixedly connected with the screw nut (3).
4. The signal steering gear according to claim 1, wherein the number of the limit sliding rods (5) is two, the two limit sliding rods (5) are symmetrically arranged on two radial sides of the ball screw (1), and two ends of each limit sliding rod (5) respectively penetrate through the two bearing seats (2) and are fixedly connected with the bearing seats (2) through nuts (12).
5. The signal steering gear according to claim 4, characterized in that both ends of the limit slide bar (5) are provided with threads.
6. The signal steering gear according to claim 4, wherein the screw nut (3) is fixedly connected with the sliding blocks (6) through a connecting piece (13), a through hole for installing the screw nut and a first connecting hole for fixedly connecting with the screw nut are formed in a connecting plate of the connecting piece (13), and second connecting holes for connecting with the two sliding blocks (6) are formed in two side plates of the connecting piece (13).
7. The signal diverter according to any one of claims 1-6, characterized in that the signal diverter further comprises a first housing part (15) arranged between two of the bearing housings (2), a second housing part (16) arranged between the bearing housings (2), the PCB board mounting (14) and a third housing part (17) arranged outside the PCB board mounting (14) and fixedly connected thereto.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221251417U true CN221251417U (en) | 2024-07-02 |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |