CN116292644B - Radar transmission device - Google Patents
Radar transmission device Download PDFInfo
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- CN116292644B CN116292644B CN202310553006.0A CN202310553006A CN116292644B CN 116292644 B CN116292644 B CN 116292644B CN 202310553006 A CN202310553006 A CN 202310553006A CN 116292644 B CN116292644 B CN 116292644B
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- ring
- ball bearing
- contact ball
- angular contact
- transmission shaft
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/061—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing mounting a plurality of bearings side by side
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/063—Fixing them on the shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/123—Wound springs
- F16F15/1232—Wound springs characterised by the spring mounting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The application relates to the technical field of radar detection and discloses a radar transmission device. The radar transmission device includes: the transmission shaft is provided with a first flange; the first angular contact ball bearing comprises a first outer ring and a first inner ring; the first angular contact ball bearing and the second angular contact ball bearing are sleeved on the transmission shaft in parallel; the pre-tightening assembly is detachably connected with one end of the transmission shaft and can move along the axial direction of the transmission shaft; one end of the first inner ring, which is away from the second inner ring, is abutted with the first flange, and one end of the second inner ring, which is away from the first inner ring, is abutted with the pre-tightening assembly. The scheme provided by the application solves the problem of lower axial positioning precision of the transmission shaft of the radar bearing, and can improve the axial positioning precision of the transmission shaft.
Description
Technical Field
The application relates to the technical field of radar detection, in particular to a radar transmission device.
Background
The radar scanning technology is to obtain coordinate data of the object surface in the form of an array point cloud by non-contact high-speed laser scanning. Radar drives typically have a drive shaft and a radar bearing mounted over the drive shaft, which is a miniature bearing capable of carrying the combined loads, which is a critical component for radar azimuth control and rotation. The radar bearing can bear combined loads such as axial force, radial force, overturning moment and the like caused by self gravity and external load.
In the related art, the vehicle-mounted radar can be folded and folded when not in operation, and needs to be unfolded and erected in the operation process, so that the transmission shaft of the radar transmission device is required to be accurately positioned in the radial direction and the axial direction. However, the positioning accuracy of the radar bearing in the axial direction of the transmission shaft is still to be improved, when the transmission shaft is in a vertical state in Lei Dayun, the inner ring and the outer ring of the radar bearing vibrate relatively to enable the transmission shaft to displace in the axial direction, and the detection accuracy of the radar is affected.
Disclosure of Invention
In order to solve or partially solve the problems existing in the related art, the application provides a radar transmission device capable of improving the axial positioning accuracy of the transmission device.
The application provides a radar transmission device, comprising: the transmission shaft is provided with a first flange; the first angular contact ball bearing comprises a first outer ring and a first inner ring; the first angular contact ball bearing and the second angular contact ball bearing are sleeved on the transmission shaft in parallel; the pre-tightening assembly is detachably connected with one end of the transmission shaft and can move along the axial direction of the transmission shaft; one end of the first inner ring, which is away from the second inner ring, is abutted with the first flange, and one end of the second inner ring, which is away from the first inner ring, is abutted with the pre-tightening assembly.
Further, the first outer ring is abutted to the second outer ring, a gap is reserved between the first inner ring and the second inner ring, and the first angular contact ball bearing and the second angular contact ball bearing are installed in a back-to-back mode.
Further, sealing rings are respectively arranged on the first angular contact ball bearing and the second angular contact ball bearing, the outer peripheral surface of the sealing ring of the first angular contact ball bearing is connected with the first outer ring, and the outer peripheral surface of the sealing ring of the second angular contact ball bearing is connected with the second outer ring.
Further, the sealing ring is arranged on one side, close to the first flange, of the first angular contact ball bearing, and the sealing rings are respectively arranged on two opposite sides of the second angular contact ball bearing; and the inner peripheral surface of the sealing ring positioned on the first angular contact ball bearing is in clearance fit with the first flange, and the inner peripheral surface of the sealing ring positioned on the second angular contact ball bearing is in clearance fit with the second inner ring.
Further, the radar transmission device further comprises a check ring sleeved on the first flange, and the check ring is located on one side of the sealing ring on the first angular contact ball bearing.
Further, the cross section of retaining ring is L shape, the inner peripheral face card of retaining ring is located on the first flange, the outer peripheral face of retaining ring with first outer lane clearance fit.
Further, an accommodating cavity is formed in the sealing ring and arranged along the circumferential direction of the sealing ring, and the accommodating cavity is provided with an opening formed along the inner circumferential surface of the sealing ring.
Further, the pre-tightening assembly comprises a compressing piece and a driving piece connected with the transmission shaft, wherein the driving piece is used for driving the compressing piece to move along the axial direction of the transmission shaft so as to enable the compressing piece to be abutted to the second inner ring.
Further, the pressing piece comprises a pressing plate, a pressing ring and an elastic piece, wherein the elastic piece is connected between the pressing plate and the pressing ring, the pressing ring is sleeved on the transmission shaft, and the pressing plate is positioned at the end part of the transmission shaft; the driving piece is in threaded connection with the transmission shaft, and the driving piece can drive the pressing plate to move along the axis of the transmission shaft when the driving piece rotates relative to the transmission shaft through the threaded connection, so that the pressing ring is abutted to the second inner ring.
Further, the radar transmission device further comprises a positioning sleeve, the positioning sleeve is sleeved on the first outer ring and the second outer ring, a second flange is arranged at one end, close to the second outer ring, of the positioning sleeve, and the second flange is abutted to the end part of the second outer ring; the first outer ring is provided with a third flange, and the third flange is abutted to one end, far away from the second flange, of the positioning sleeve.
The technical scheme provided by the application can comprise the following beneficial effects: through locating first angular contact ball bearing and second angular contact ball bearing side by side on the transmission shaft, first flange butt first inner circle has the effort towards the second inner circle to first inner circle, pretension subassembly butt second inner circle has the effort towards first inner circle to the second inner circle, can restrict the axial play of first angular contact ball bearing and second angular contact ball bearing under such two opposite effort, reduces the vibration of two bearing during operation, and then improves the axial positioning accuracy of transmission shaft.
Under the condition that the rest working conditions are unchanged, the load value (high pre-tightening value is 40N) of the bearing on a certain bearing vibrator is singly changed, and average values of 10N, 20N, 30N and 40N of multipoint low frequency, medium frequency and high frequency are measured respectively, so that four groups of tests are carried out, and the data are as follows.
Table a first set of bearing vibration measurement values
Table two second group type bearing vibration measurement values
Table three third group of model bearing vibration measurement values
Table four fourth group of model bearing vibration measurement values
Analysis:
four sets of experiments were performed to verify the reliability, rationality and accuracy of the experiments. Under the conditions of the same bearing test and four groups of different applied load forces, the bearing has small low, medium and high frequency values detected by the whole bearing when the bearing is subjected to a pre-tightening load of 40N. Low, medium and high frequency values are a trend that shows a decreasing trend, wherein the high frequency changes significantly. The pre-tightening is properly increased, so that the play can be reduced, the vibration of the bearing is further reduced, and the service life of the bearing is prolonged. The technical scheme of the application can also: the acting force of the pre-tightening assembly on the second inner ring can be adjusted by moving the pre-tightening assembly along the axial direction of the transmission shaft.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
FIG. 1 is a schematic diagram of a radar transmission according to an embodiment of the present application;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of a drive shaft according to an embodiment of the present application;
fig. 4 is a schematic structural view of another radar transmission device according to an embodiment of the present application.
Reference numerals:
the device comprises a transmission shaft, a first flange, a threaded hole, a first angular contact ball bearing, a first outer ring, a third flange, a first inner ring, a second angular contact ball bearing, a second outer ring, a third outer ring, a fourth inner ring, a pre-tightening component, a pressing plate, a pressing ring, a pressing component, a driving component, a sealing ring, a holding cavity, a 52-opening, a 6-retainer ring, a 7-locating sleeve and a second flange.
Detailed Description
Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While embodiments of the present application are illustrated in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the related art, the vehicle-mounted radar can be folded and folded when not in operation, and needs to be unfolded and erected in the operation process, so that the transmission shaft of the radar transmission device is required to be accurately positioned in the radial direction and the axial direction. However, the positioning accuracy of the radar bearing in the axial direction of the transmission shaft is still to be improved, when the transmission shaft is in a vertical state in Lei Dayun, the inner ring and the outer ring of the radar bearing vibrate relatively to enable the transmission shaft to displace in the axial direction, and the detection accuracy of the radar is affected.
In view of the above problems, embodiments of the present application provide a radar transmission device capable of improving the axial positioning accuracy of the transmission.
The following describes the technical scheme of the embodiment of the present application in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, an embodiment of the present application provides a radar transmission device including a transmission shaft 1, a first angular contact ball bearing 2, a second angular contact ball bearing 3, and a pretensioning assembly 4, wherein a sectional state of the first angular contact ball bearing 2 and the second angular contact ball bearing 3 is shown in fig. 1.
The transmission shaft 1 is provided with a first flange 11, the first angular contact ball bearing 2 comprises a first outer ring 21 and a first inner ring 22, the second angular contact ball bearing 3 comprises a second outer ring 31 and a second inner ring 32, the first angular contact ball bearing 2 and the second angular contact ball bearing 3 are sleeved on the transmission shaft 1 in parallel, and the transmission shaft 1 can rotate synchronously with the first inner ring 22 and the second inner ring 32 when the radar works.
The pretension assembly 4 is detachably connected with one end of the drive shaft 1, and the pretension assembly 4 can move along the axial direction of the drive shaft 1. One end of the first inner ring 22 facing away from the second inner ring 32 abuts against the first flange 11, and one end of the second inner ring 32 facing away from the first inner ring 22 abuts against the pretensioning assembly 4. The first flange 11 is shown to the right of the first inner race 22 and the pretensioning assembly 4 is shown to the left of the second inner race 32.
Based on the above scheme, through locating first angular contact ball bearing 2 and second angular contact ball bearing 3 parallel cover on transmission shaft 1, first flange 11 butt first inner circle 22 has the effort towards second inner circle 32 to first inner circle 22, pretension subassembly 4 butt second inner circle 32 has the effort towards first inner circle 22 to second inner circle 32, can restrict the axial play of first angular contact ball bearing 2 and second angular contact ball bearing 3 under such two opposite effort, reduce the axial float of two bearing during operation, restrict transmission shaft 1 and move in the axial, and then improve the axial positioning accuracy of transmission shaft 1, guarantee the detection precision of radar. In addition, by moving the pretensioning assembly 4 in the axial direction of the drive shaft 1, the magnitude of the acting force of the pretensioning assembly 4 on the second inner ring 32 can be adjusted, and precise control of the pretensioning force of the first angular contact ball bearing 2 and the second angular contact ball bearing 3 can be realized.
In practical implementation, the radar can be installed at one end of the transmission shaft 1 far away from the pre-tightening assembly 4, and the transmission shaft 1 rotates to drive the radar to rotate. It should be noted that the radar transmission device of the embodiment of the application can be applied to automobiles, cleaning robots, service robots, storage robots, inspection robots and other devices.
Further, when a pair of angular contact ball bearings is subjected to a load in both directions in the axial direction, the two angular contact ball bearings may be mounted face to face or back to back. The first angular contact ball bearing 2 and the second angular contact ball bearing 3 of the present embodiment are mounted in a back-to-back manner.
Specifically, as shown in fig. 1 and 2, in the present embodiment, the first outer ring 21 is in contact with the second outer ring 31, a gap is provided between the first inner ring 22 and the second inner ring 32, and the first angular ball bearing 2 and the second angular ball bearing 3 are mounted in a back-to-back manner. In this way, the biasing force of the pretensioning assembly 4 against the second inner race 32 is rightward, the biasing force of the first flange 11 against the first inner race 22 is leftward, and the axial play of the first angular ball bearing 2 and the second angular ball bearing 3 is collectively eliminated, thereby restricting the left-right movement of the propeller shaft 1 in the axial direction. The back-to-back mounting provides a greater force point of application span than the face-to-face mounting, resulting in a more rigid drive shaft 1. The first inner ring 22 and the second inner ring 32 still have a gap after being abutted by the first flange 11 and the pretensioning assembly 4, so that the first outer ring 21 and the second outer ring 31 can be ensured to be always in an abutting state, and the first outer ring 21 and the second outer ring 31 are prevented from generating relative movement. The outer rings of the two bearings are respectively provided with a locking inclined plane, so that the steel balls can be conveniently installed.
Grease for lubrication is usually injected into the bearing to ensure smooth rotation of the bearing. In order to prevent grease from leaking, in the present embodiment, as shown in fig. 1 and 2, the first angular ball bearing 2 and the second angular ball bearing 3 are provided with seal rings 5, respectively, the outer peripheral surface of the seal ring 5 located in the first angular ball bearing 2 is connected to the first outer ring 21, and the outer peripheral surface of the seal ring 5 located in the second angular ball bearing 3 is connected to the second outer ring 31. Specifically, the sealing ring 5 is located between the outer ring and the inner ring, is annular, and prevents grease from flowing out of the bearing. In this embodiment, the seal ring 5 is connected to the outer ring, so that the seal ring 5 and the outer ring will be stationary when the inner ring rotates.
As shown in fig. 1 and 2, in the present embodiment, a sealing ring 5 is provided on one side of the first angular contact ball bearing 2 near the first flange 11, and sealing rings 5 are provided on two opposite sides of the second angular contact ball bearing 3; the inner peripheral surface of the seal ring 5 located in the first angular ball bearing 2 is in clearance fit with the first flange 11, and the inner peripheral surface of the seal ring 5 located in the second angular ball bearing 3 is in clearance fit with the second inner ring 32.
Specifically, the seal ring 5 provided on the side of the first angular contact ball bearing 2 close to the first flange 11 is used to prevent grease inside the first angular contact ball bearing 2 from flowing from the right side to the outside of the bearing. And a seal ring 5 arranged on the left side of the second angular ball bearing 3 is used for preventing grease inside the second angular ball bearing 3 from flowing out of the second angular ball bearing 3 from the left side. The sealing ring 5 arranged on the right side of the second angular contact ball bearing 3 is used for preventing grease inside the second angular contact ball bearing 3 from flowing into the first angular contact ball bearing 2 and simultaneously preventing grease inside the first angular contact ball bearing 2 from flowing into the second angular contact ball bearing 3 so as to ensure that sufficient grease is arranged in both bearings. Since the first outer ring 21 and the second outer ring 31 are abutted, the gap between the two inner rings is small, so that the left side of the first angular contact ball bearing 2 is not provided with the seal ring 5, and the grease can be ensured not to flow outside the channel.
In addition, the inner peripheral surface of the sealing ring 5 on the first angular contact ball bearing 2 is in clearance fit with the first flange 11, and the inner peripheral surface of the sealing ring 5 on the second angular contact ball bearing 3 is in clearance fit with the second inner ring 32, so that the inner ring and the transmission shaft 1 do not contact with the sealing ring 5 when rotating, non-contact sealing is realized, the friction moment of the bearing is low relative to contact sealing, the rotation torque is small, the abrasion of the bearing is reduced, the rapid increase of the internal temperature of the bearing is prevented, and the service life of the bearing is prolonged.
As shown in fig. 1 and 2, in the present embodiment, the radar transmission device further includes a retainer ring 6 sleeved on the first flange 11, and the retainer ring 6 is located on one side of the sealing ring 5 on the first angular contact ball bearing 2. The retainer ring 6 is used for further blocking the grease overflowing from the first corner contact ball bearing 2, increasing the grease axial leakage passage and playing the role of radial and axial sealing. When the transmission shaft 1 vertically rotates, impurities on the retainer ring 6 can be automatically thrown out by utilizing the centrifugal force of the impurities. Optionally, the cross section of the retainer ring 6 is L-shaped, and can block grease leakage in both the axial direction and the radial direction.
In order to further improve the sealability of the bearing, as shown in fig. 2, in the present embodiment, a housing chamber 51 provided along the circumferential direction of the seal ring 5 is provided in the seal ring 5, and the housing chamber 51 has an opening 52 provided along the inner circumferential surface of the seal ring 5. In this way, the grease leaking from the gap can enter the accommodating chamber 51 from the opening 52, the accommodating chamber 51 is secondarily secured against the grease leakage, and the opening 52 can also form a boundary oil film with the first flange 11 or the second inner ring 32, thereby better performing the functions of sealing and reducing the leakage amount.
In some embodiments, as shown in fig. 1, the pre-tightening assembly 4 includes a pressing member 41 and a driving member 42 connected to the transmission shaft 1, where the driving member 42 is configured to drive the pressing member 41 to move along the axial direction of the transmission shaft 1 so as to abut the pressing member 41 against the second inner ring 32. Specifically, the transmission shaft 1 has a force on the driving member 42, the driving member 42 has a force on the pressing member 41, and the pressing member 41 transmits the force to the second inner ring 32.
In this embodiment, the pressing member 41 includes a pressing plate 411, a pressing ring 412 and an elastic member 413, the elastic member 413 is connected between the pressing plate 411 and the pressing ring 412, the pressing ring 412 is sleeved on the transmission shaft 1, and the pressing plate 411 is located at an end of the transmission shaft 1; the driving member 42 is screwed with the transmission shaft 1, and when the driving member 42 rotates relative to the transmission shaft 1 through the screwed connection, the pressing plate 411 can be driven to move along the axis of the transmission shaft 1, so that the pressing ring 412 abuts against the second inner ring 32. Thus, the two bearings can be pre-tightened through the rotary driving piece 42, so that the whole axial pre-tightening operation process is simple and convenient, and the pre-tightening efficiency is improved.
Specifically, when the driving member 42 abuts against the pressing plate 411 and the driving member 42 rotates, the pressing plate 411 can be pushed to move along the axial direction of the transmission shaft 1, and the pressing plate 411 drives the pressing ring 412 to move through the elastic member 413 until the pressing ring 412 abuts against the second inner ring 32 and has a certain acting force on the second inner ring 32.
The force of the pressing ring 412 against the second inner ring 32 can be converted by the deformation of the elastic member 413, and specifically, the pressing force of the pressing ring 412 against the second inner ring 32 can be precisely controlled by controlling the gap between the pressing plate 411 and the pressing ring 412. The accuracy requirement of radar transmission is higher, and the magnitude of the pretightning force that the bearing receives can influence the resistance magnitude such as frictional force that need overcome when the bearing rotates, and then influences the required driving force of drive transmission shaft 1, consequently through the accurate control second inner circle 32 size of the pressure that receives of elastic component 413, can guarantee the accuracy of radar operation.
In addition, because of the axial tolerance between the driving member 42 and the driving shaft 1, when the driving member 42 pushes the pressing plate 411 to move and controls the moving distance of the pressing plate 411 in the axial direction of the driving shaft 1, a certain error will exist in the moving distance of the pressing plate 411, and if the pressing plate 411 is directly and rigidly connected to the pressing ring 412, the error will be transmitted to the pressing ring 412, so that the pressing force of the pressing ring 412 to the second inner ring 32 cannot be accurately controlled. By providing the elastic member 413 between the pressing plate 411 and the pressing ring 412, the influence of the fit tolerance between the driving member 42 and the transmission shaft 1 is eliminated, and precise control of the pretightening force is ensured.
Alternatively, the elastic member 413 is a spring, and the springs may be plural and distributed circumferentially around the axis of the transmission shaft 1; the spring can also be one and sleeved on the transmission shaft 1.
As shown in fig. 1, in this embodiment, the driving member 42 is a nut, one end of the transmission shaft 1, which is close to the pretensioning component 4, is provided with a threaded hole 12, a screw (not shown in the drawing) is disposed in the threaded hole 12, and an end portion of the screw extends out of the threaded hole 12, passes through the pressing plate 411 and is in threaded engagement with the nut, and one side of the nut abuts against the pressing plate 411. In other embodiments, the driving member 42 may also be a bolt, where the bolt passes through the pressing plate 411 and then is in threaded engagement with the threaded hole 12, and the head of the bolt abuts against the pressing plate 411.
As shown in fig. 1 and 2, the transmission device of the present embodiment further includes a positioning sleeve 7, the positioning sleeve 7 is sleeved on the first outer ring 21 and the second outer ring 31, one end of the positioning sleeve 7, which is close to the second outer ring 31, is provided with a second flange 71, and the second flange 71 is abutted against the end of the second outer ring 31; the first outer ring 21 is provided with a third flange 211, and the third flange 211 is abutted against one end of the positioning sleeve 7, which is far away from the second flange 71.
Specifically, the positioning sleeve 7 is used for positioning the outer ring, the second angular contact ball bearing 3 and the first angular contact ball bearing 2 are sequentially installed in the positioning sleeve 7 during installation, the second flange 71 and the third flange 211 facilitate the axial positioning of the positioning sleeve 7, the installation and the fixation are facilitated, and the third flange 211 and the positioning sleeve 7 can be fixedly connected through bolts during installation.
As shown in fig. 4, the embodiment of the present application also provides another radar transmission device, which differs from the above-described embodiment only in that the pressing member 41, in this embodiment, the pressing member 41 includes the pressing plate 411 and the elastic member 413, and does not include the pressing ring 412 in the above-described embodiment. One end of the elastic member 413 is connected to the pressing plate 411, the other end of the elastic member is directly abutted to the second inner ring 32, and the driving member 42 can drive the pressing plate 411 to move along the axis of the transmission shaft 1 when relatively rotating with the transmission shaft 1 through threaded connection, so as to adjust the abutting force between the elastic member 413 and the second inner ring 32, thereby adjusting the pretightening force to the two bearings. This can reduce the part clamping ring 412 and thus the length dimension of the radar transmission. Specifically, the elastic member 413 may be a belleville spring, an extension spring, a compression spring, or the like. Other matters of the radar transmission device in this embodiment are the same as those in the above embodiment, and will not be described here again.
The foregoing description of embodiments of the application has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. A radar transmission device, comprising:
the transmission shaft is provided with a first flange;
the first angular contact ball bearing comprises a first outer ring and a first inner ring;
the first angular contact ball bearing and the second angular contact ball bearing are sleeved on the transmission shaft in parallel;
the pre-tightening assembly is detachably connected with one end of the transmission shaft and can move along the axial direction of the transmission shaft;
one end of the first inner ring, which is away from the second inner ring, is abutted with the first flange, and one end of the second inner ring, which is away from the first inner ring, is abutted with the pre-tightening assembly;
the first outer ring is abutted with the second outer ring, a gap is reserved between the first inner ring and the second inner ring, and the first angular contact ball bearing and the second angular contact ball bearing are installed in a back-to-back mode;
the positioning sleeve is sleeved on the first outer ring and the second outer ring, a second flange is arranged at one end, close to the second outer ring, of the positioning sleeve, and the second flange is abutted to the end part of the second outer ring;
the first outer ring is provided with a third flange, and the third flange is abutted to one end, far away from the second flange, of the positioning sleeve.
2. The radar transmission according to claim 1, wherein:
the first angular contact ball bearing and the second angular contact ball bearing are respectively provided with a sealing ring, the outer circumferential surface of the sealing ring positioned on the first angular contact ball bearing is connected with the first outer ring, and the outer circumferential surface of the sealing ring positioned on the second angular contact ball bearing is connected with the second outer ring.
3. The radar transmission according to claim 2, wherein:
the sealing ring is arranged on one side, close to the first flange, of the first angular contact ball bearing, and the sealing ring is respectively arranged on two opposite sides of the second angular contact ball bearing;
and the inner peripheral surface of the sealing ring positioned on the first angular contact ball bearing is in clearance fit with the first flange, and the inner peripheral surface of the sealing ring positioned on the second angular contact ball bearing is in clearance fit with the second inner ring.
4. A radar transmission according to claim 3, wherein:
the sealing ring is sleeved on the first flange, and the sealing ring is positioned on one side of the sealing ring on the first angular contact ball bearing.
5. The radar transmission device according to claim 4, wherein:
the cross-section of retaining ring is L shape, the inner peripheral face card of retaining ring is located on the first flange, the outer peripheral face of retaining ring with first outer lane clearance fit.
6. The radar transmission according to claim 2, wherein:
the sealing ring is internally provided with an accommodating cavity arranged along the circumferential direction of the sealing ring, and the accommodating cavity is provided with an opening arranged along the inner circumferential surface of the sealing ring.
7. The radar transmission according to claim 1, wherein:
the pre-tightening assembly comprises a pressing piece and a driving piece connected with the transmission shaft, wherein the driving piece is used for driving the pressing piece to move along the axial direction of the transmission shaft so as to enable the pressing piece to be abutted to the second inner ring.
8. The radar transmission device according to claim 7, wherein:
the pressing piece comprises a pressing plate, a pressing ring and an elastic piece, wherein the elastic piece is connected between the pressing plate and the pressing ring, the pressing ring is sleeved on the transmission shaft, and the pressing plate is positioned at the end part of the transmission shaft;
the driving piece is in threaded connection with the transmission shaft, and the driving piece can drive the pressing plate to move along the axis of the transmission shaft when the driving piece rotates relative to the transmission shaft through the threaded connection, so that the pressing ring is abutted to the second inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310553006.0A CN116292644B (en) | 2023-05-17 | 2023-05-17 | Radar transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310553006.0A CN116292644B (en) | 2023-05-17 | 2023-05-17 | Radar transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116292644A CN116292644A (en) | 2023-06-23 |
| CN116292644B true CN116292644B (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310553006.0A Active CN116292644B (en) | 2023-05-17 | 2023-05-17 | Radar transmission device |
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| Country | Link |
|---|---|
| CN (1) | CN116292644B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152461A (en) * | 2017-06-30 | 2017-09-12 | 中山市盈科轴承制造有限公司 | Nonstandard four-point contact ball |
| CN107830065A (en) * | 2017-12-04 | 2018-03-23 | 洛阳理工学院 | Paired thrust ball bearing pre-tightening apparatus |
| CN211145139U (en) * | 2019-08-21 | 2020-07-31 | 纳贝格轴承无锡有限公司 | Angular contact ball bearing pre-tightening mechanism |
| CN111795077A (en) * | 2020-06-09 | 2020-10-20 | 江苏理工学院 | Bearing preloading device |
| CN113944689A (en) * | 2021-09-30 | 2022-01-18 | 宁波市镇海银球轴承有限公司 | Axial pre-tightening double-row dustproof long-shaft deep groove ball bearing assembly structure |
-
2023
- 2023-05-17 CN CN202310553006.0A patent/CN116292644B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152461A (en) * | 2017-06-30 | 2017-09-12 | 中山市盈科轴承制造有限公司 | Nonstandard four-point contact ball |
| CN107830065A (en) * | 2017-12-04 | 2018-03-23 | 洛阳理工学院 | Paired thrust ball bearing pre-tightening apparatus |
| CN211145139U (en) * | 2019-08-21 | 2020-07-31 | 纳贝格轴承无锡有限公司 | Angular contact ball bearing pre-tightening mechanism |
| CN111795077A (en) * | 2020-06-09 | 2020-10-20 | 江苏理工学院 | Bearing preloading device |
| CN113944689A (en) * | 2021-09-30 | 2022-01-18 | 宁波市镇海银球轴承有限公司 | Axial pre-tightening double-row dustproof long-shaft deep groove ball bearing assembly structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116292644A (en) | 2023-06-23 |
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