CN217603170U

CN217603170U - Laser radar bearing

Info

Publication number: CN217603170U
Application number: CN202220831613.XU
Authority: CN
Inventors: 肖�琳; 毕寒冰; 罗玉芹
Original assignee: SHANGHAI TIANAN BEARING CO Ltd
Current assignee: SHANGHAI TIANAN BEARING CO Ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-10-18
Anticipated expiration: 2032-04-06

Abstract

The utility model relates to a laser radar bearing, including bearing inner race, be equipped with the flange of installation location usefulness on the outer cylinder of bearing inner race, form bearing inner race and bearing frame integral structure, set up a plurality of installation screw holes on the flange, be equipped with the biserial raceway in the bearing inner race to connect two bearing inner races through biserial raceway and steel ball cooperation, set up a spacer ring between two bearing inner races, and have certain clearance between spacer ring and two bearing inner races. The utility model discloses with bearing inner race and bearing frame integration, removed the processing and the installation of bearing frame from, broken through the poor bottleneck problem of bearing frame precision, improved bearing moving concentricity, reduced the running noise of bearing for user's installation effectiveness has solved the inconsistent high low temperature operating stability problem that causes of bearing frame and bearing material coefficient of thermal expansion. After the inner rings of the two bearings and the space ring are matched and clamped, self-pretightening is realized, and the problem that the pretightening force of the original structure is difficult to control is solved.

Description

Laser radar bearing

Technical Field

The utility model relates to a mechanical laser radar, especially a bearing for mechanical laser radar.

Background

Lidar is a sensor used to acquire precise position information, like the human eye. The working principle is that a laser signal is emitted to a target, then the signal reflected by the target is compared with the emitted signal, and after processing, the relevant information of the target can be obtained. Such as parameters of object distance, orientation, altitude, speed, attitude, and even shape. The laser radar generally adopts a brushless motor to drive a scanning system, in order to ensure the rotational stability of the scanning system, the volume of the whole radar is reduced as much as possible while the rigidity of a rotating shaft of the scanning system is ensured, lubricating grease does not leak at high temperature, the starting torque of the radar is small at low temperature, the noise of the whole radar is tested by a sound level meter, and the power consumption of the whole radar is low.

At present, the domestic mechanical laser radar technology, the stability of the internal mechanical structure of the radar, and the precision, reliability and stability of the radar have certain gaps compared with those of the radar at abroad. Lidar bearings are a core component of lidar. Because the laser radar has strict requirements on angular displacement rigidity, axial rigidity, radial rigidity, high and low temperature, current fluctuation, rotating speed fluctuation, low-power starting and noise, the assembly efficiency of the bearing with the original structure (see figure 1) is low, two flange bearings are required to be respectively installed at two ends of a bearing seat, the matching tolerance of the bearing seat and the excircle of the bearing needs to be strictly controlled, the bearing seat is limited by poor concentricity of materials and processing modes, the rotation precision of a precision bearing is influenced, the rigidity control difficulty is high, the inner rings of two sets of bearings are emptied, the axial displacement quantity of the two inner rings is uncontrollable, the larger the axial displacement quantity is, the larger the pretightening force is, the consistency of the pretightening force is poor, the signal emission and recovery of the laser radar are influenced, the accuracy of the laser radar is reduced, and further, the high research and development cost and the slow development of the domestic high-end laser radar are aggravated. The utility model discloses a structural innovation has solved above-mentioned problem.

Disclosure of Invention

For solving the problem that prior art exists, the utility model provides a laser radar bearing.

In order to achieve the purpose, the utility model adopts the technical proposal that: the utility model provides a laser radar bearing, includes bearing inner race, be equipped with the flange of installation location usefulness on the outer cylinder of bearing inner race, form bearing inner race and bearing frame integral structure, set up a plurality of installation screw holes on the flange, be equipped with the biserial raceway in the bearing inner race to through biserial raceway and steel ball cooperation connection two bearing inner races, set up a space ring between two bearing inner races, and have certain clearance between space ring and two bearing inner races.

Furthermore, after the two bearing inner rings and the space ring are matched and axially clamped, the axial displacement of the two bearing inner rings is limited and controlled in the required displacement by the space ring, and self-pre-tightening is realized.

Furthermore, a plurality of arc grooves are arranged on the edge of the flange.

Furthermore, the plurality of mounting threaded holes and the arc grooves are uniformly distributed or non-uniformly distributed on the flange according to the structural requirement of a host.

Furthermore, the bearing outer ring is provided with an inclined flange, so that two rows of steel balls can be smoothly loaded into two rows of raceways respectively.

Furthermore, a crown-shaped retainer is respectively assembled between the bearing outer ring and the two bearing inner rings, and the crown-shaped retainer uniformly separates a plurality of steel balls.

Furthermore, dust covers or sealing rings are assembled on two sides of the laser radar bearing.

Further, a radial clearance of 2-100 microns is arranged in the laser radar bearing, and the radial clearance comprises 2 microns and 100 microns.

Further, the laser radar bearing is filled with low-volatility grease, and the low-volatility grease accounts for 5% -50% of the inner space of the bearing and comprises 5% and 50%.

The utility model has the advantages that:

the utility model discloses a laser radar bearing, with bearing inner race and bearing frame integration, the processing and the installation of bearing frame have been removed from, have broken through the poor bottleneck problem of bearing frame precision, have improved bearing moving concentricity, have reduced the running noise of bearing for user's installation effectiveness has solved the high low temperature running stability problem that bearing frame and bearing material coefficient of thermal expansion inconsistent caused. The double-row roller paths and the inclined flanges are arranged in the bearing outer ring, so that two rows of steel balls can be smoothly loaded into the two rows of roller paths respectively, two bearing inner rings are arranged, the spacer ring with the height selected and matched is arranged between the two bearing inner rings, and the axial displacement of the two bearing inner rings and the spacer ring after matched clamping is measured and controlled within a certain range (see figure 4), namely the axial rigidity and the pretightening force are controlled within a certain range. When the bearing is used, the two bearing inner rings and the space ring are matched and clamped, so that self-pretightening is realized, and the axial displacement of the two inner rings is limited by the space ring, so that the pretightening force is stable and controllable, and the problem that the pretightening force of the original structure is difficult to control is solved. Meanwhile, the bearing seat and the bearing are integrated, so that the actual occupied space of the bearing is larger in the original limited space, the model with larger size can be selected, the rated load of the bearing is improved, and the service life of the bearing is prolonged.

Therefore, the utility model discloses an above-mentioned two technical scheme of point all improve the radar precision, accelerated radar installation effectiveness greatly, realize batchization, scale more easily.

Drawings

FIG. 1 is a schematic diagram of a prior art bearing structure for a lidar;

FIG. 2 is a cross-sectional view of the lidar bearing structure of the present invention;

fig. 3 is a side view of the lidar-bearing structure of the present invention;

fig. 4 is the utility model discloses a laser radar bearing axle clearance measures principle schematic diagram.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 2 and 3, an embodiment of the present invention provides a laser radar bearing, which includes a bearing outer ring 1, a bearing inner ring 2, a spacer ring 3, a crown-shaped holder 7, a steel ball 6, and a dust cover or a seal ring 8.

The outer cylinder of the bearing outer ring 1 is provided with a flange 4 for mounting and positioning, a plurality of mounting threaded holes 5 are uniformly or non-uniformly distributed on the flange 4, and the bearing outer ring 1 has the function of a bearing seat.

A double-row raceway is arranged in the bearing outer ring 1, the two bearing inner rings 2 are connected through the double-row raceway and steel balls 6 in a matched mode, a space ring 3 is arranged between the two bearing inner rings 2, and a certain gap is formed between the space ring 3 and the two bearing inner rings. After the two bearing inner rings 2 and the space ring 3 are matched and axially clamped, as shown in fig. 4, the axial displacement of the two bearing inner rings 2 can be controlled in the required displacement, so that self-pre-tightening is realized, and the problem that the pre-tightening force of the original structure is difficult to control is solved.

As shown in fig. 4, the present embodiment employs a spacer 3 with a selected height between two inner bearing rings 2. The mounting shaft 10 is penetrated in the two bearing inner rings 2, the flange at the front end of the mounting shaft 10 is abutted against the side end face of the front bearing inner ring 2, and the rear end of the mounting shaft 10 is clamped and locked by the clamping nut 11 on the rear bearing inner ring 2. The axial displacement of the two bearing inner rings 2 and the spacer 3 after matched clamping is measured and controlled within a certain range, namely the axial rigidity and the pretightening force are controlled within a certain range.

Preferably, the flange 4 is provided with a plurality of circular arc grooves 9 on the edge.

Preferably, the plurality of mounting threaded holes 5 and the arc grooves 9 are uniformly or non-uniformly distributed on the flange 4 according to the requirement of a host structure.

Preferably, the bearing outer ring 1 is provided with a sloping rib 12 so that two rows of steel balls 6 can be smoothly loaded into two rows of raceways, respectively.

Preferably, a crown-shaped retainer 7 is respectively assembled between the bearing outer ring 1 and the two bearing inner rings 2, and the crown-shaped retainer 7 uniformly separates a plurality of steel balls 6.

Preferably, the bearings are fitted on both sides with dust caps or sealing rings 8.

Preferably, a radial play of 2 to 100 microns, including 2 microns and 100 microns, is provided inside the bearing.

Preferably, the filling of the low-volatility grease in the bearing accounts for 5% -50%, including 5% and 50% of the inner space of the bearing.

The utility model discloses a laser radar bearing, with bearing inner race and bearing frame integration, the processing and the installation of bearing frame have been removed from, have broken through the poor bottleneck problem of bearing frame precision, have improved bearing moving concentricity, have reduced the running noise of bearing for user's installation effectiveness has solved the high low temperature running stability problem that bearing frame and bearing material coefficient of thermal expansion inconsistent caused.

Claims

1. The laser radar bearing comprises a bearing outer ring and a bearing inner ring, and is characterized in that: the bearing outer ring outer cylinder is provided with a flange for mounting and positioning to form a bearing outer ring and bearing seat integrated structure, the flange is provided with a plurality of mounting threaded holes, a double-row raceway is arranged in the bearing outer ring, the two bearing inner rings are connected through the double-row raceway and a steel ball in a matched mode, a spacer ring is arranged between the two bearing inner rings, and a certain gap is formed between the spacer ring and the two bearing inner rings.

2. Lidar bearing according to claim 1, wherein: when the two bearing inner rings and the space ring are matched and axially clamped, the axial displacement of the two bearing inner rings is limited and controlled in the required displacement by the space ring, and self-pre-tightening is realized.

3. Lidar bearing according to claim 1, wherein: and a plurality of arc grooves are arranged on the edge of the flange.

4. The lidar bearing of claim 3, wherein: the installation threaded holes and the arc grooves are uniformly distributed or non-uniformly distributed on the flange according to the structural requirement of a host.

5. The lidar bearing of claim 1, wherein: the bearing outer ring is provided with an inclined flange, so that two rows of steel balls can be respectively and smoothly loaded into two rows of raceways.

6. The lidar bearing of claim 1, wherein: and crown-shaped retainers are respectively assembled between the bearing outer ring and the two bearing inner rings and uniformly separate a plurality of steel balls.

7. The lidar bearing of claim 1, wherein: and dust covers or sealing rings are assembled on two sides of the laser radar bearing.

8. The lidar bearing of claim 1, wherein: the laser radar bearing is internally provided with a radial clearance of 2-100 micrometers, including 2 micrometers and 100 micrometers.

9. The lidar bearing of claim 1, wherein: the laser radar bearing is filled with low-volatility grease, and the low-volatility grease accounts for 5% -50% of the inner space of the bearing and comprises 5% and 50%.