CN218266779U - Rotating structure and laser sensor - Google Patents

Abstract

The application is applicable to the technical field of bearings, and provides a rotating structure and a laser sensor, wherein the laser sensor comprises a rotating structure, and the rotating structure comprises a fixed main body, a rotating shaft and a bearing; the rotating body is rotatable relative to the stationary body; the rotating shaft is connected with the rotating main body; the bearing is assembled on the fixed main body and sleeved on the rotating shaft; a first fit clearance is formed between the inner peripheral side of the bearing and the outer peripheral side of the rotating shaft, and the range of the first fit clearance is 0.005 mm-0.025 mm. So set up for less fit clearance has between bearing and the pivot, can solve the poor problem that leads to the fit clearance between pivot and each bearing big of the axiality between a plurality of bearings, and then slow down the pivot for the problem of bearing slope, thereby help improving pivot and rotating body's rotational stability, thereby when revolution mechanic is applied to laser sensor, reduce laser sensor's the angle of pitch tolerance.

Description

Rotating structure and laser sensor

Technical Field

The application belongs to the technical field of bearings, and particularly relates to a rotating structure and a laser sensor.

Background

The rotating structure generally includes a fixed body and a rotating body capable of rotating relative to the fixed body, and the rotating body and the fixed body are assembled through a rotating shaft and a bearing. In the traditional scheme, the number of the bearings is generally set to be a plurality of, and the inner rings of the plurality of bearings are all sleeved on the rotating shaft.

However, due to the influence of the assembly process, the coaxiality difference inevitably exists among the bearings, so that a large fit clearance exists between each bearing and the rotating shaft, the rotating shaft is easy to incline relative to the bearings, and the rotating stability of the rotating shaft is not favorably maintained; based on this, when the rotating structure is applied to the laser sensor, it is easy to make the laser sensor have a large pitch angle tolerance.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the embodiment of the application is as follows: the utility model provides a rotating structure, aims at solving the technical problem that the rotating structure's rotational stability is poor among the relevant art.

In order to solve the technical problem, the embodiment of the application adopts the following technical scheme:

in a first aspect, a rotating structure is provided, including:

a fixed main body;

a rotating body rotatable with respect to the fixed body;

a rotating shaft connected to the rotating body;

the bearing is assembled on the fixed main body and sleeved on the rotating shaft; a first fit clearance is formed between the inner peripheral side of the bearing and the outer peripheral side of the rotating shaft, and the range of the first fit clearance is 0.005 mm-0.025 mm.

In one embodiment, the first mating clearance is in a range of 0.01mm to 0.02mm.

In one embodiment, the bearing is an oil bearing, and the bearing is configured to have an oil content in the range of 18% to 22%.

In one embodiment, the number of oil bearings is one.

In one embodiment, one end of the rotating shaft is connected to the rotating body, and the outer periphery of the other end of the rotating shaft is provided with a first chamfer which is a round angle.

In one embodiment, two opposite end parts of the bearing along the axial direction are respectively provided with a second chamfer, and the second chamfers are arranged on the inner peripheral side of the bearing;

and/or third chamfers are arranged at two opposite end parts of the bearing along the axial direction, and the third chamfers are arranged on the outer peripheral side of the bearing.

In one embodiment, the rotating structure further includes a first gasket, the first gasket is sleeved outside the rotating shaft and is abutted between the bearing and the rotating body along the axial direction of the rotating shaft.

In one embodiment, the rotating structure further includes a limiting member, an annular groove is formed on an outer peripheral side of the rotating shaft, the limiting member is disposed around the rotating shaft, and is limited in the annular groove along an axial direction of the rotating shaft, and abuts against a side of the bearing back to the rotating body along the axial direction of the rotating shaft.

In one embodiment, the rotating structure further includes a second gasket, the second gasket is sleeved outside the rotating shaft and abuts against between the bearing and the limiting member along the axial direction of the rotating shaft.

In a second aspect, there is provided a laser sensor comprising:

a sensor body;

and the sensor body is assembled on the rotating body of the rotating structure.

The rotating structure and the laser sensor provided by the embodiment of the application have the beneficial effects that:

the embodiment of the application provides a revolution mechanic, realize the assembly through pivot and bearing between fixed main part and the revolution main part, and the fit clearance scope between the inner periphery side of bearing and the periphery side of pivot is 0.005mm ~ 0.025mm, make like this to have less fit clearance between bearing and the pivot, can solve the poor big problem of fit clearance that leads to between pivot and each bearing of axiality between a plurality of bearings, and then slow down the problem of pivot for the bearing slope, thereby help improving the rotational stability of pivot and revolution main part, and then when revolution mechanic is applied to laser sensor, reduce laser sensor's angle of pitch tolerance.

Correspondingly, the laser sensor that this application embodiment provided, owing to adopted the revolution mechanic who relates to above, it is little equally to have the fit clearance of pivot and bearing for pivot and rotating body have higher rotational stability's advantage, and then can solve the advantage of the big problem of laser sensor's angle of pitch tolerance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of a rotating structure provided in an embodiment of the present application;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a cross-sectional view of an oil-impregnated bearing associated shaft of the rotating structure provided in FIG. 1;

FIG. 5 is an enlarged view taken at A in FIG. 3;

FIG. 6 is a partial enlarged view of a rotating shaft of the rotating structure provided in FIG. 2;

fig. 7 is a perspective cross-sectional view of the oil impregnated bearing of the rotational structure provided in fig. 1.

Wherein, in the figures, the various reference numbers:

10-a stationary body; 101-assembly holes; 20-a rotating body; 30-a rotating shaft; 301-an annular groove; 40-a bearing; 50-a first shim; 60-a stop; 70-a second gasket; a-a first chamfer; b-a second chamfer; c-a third chamfer; l-first fit clearance.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise, wherein two or more includes two.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The following detailed description is made with reference to the accompanying drawings and examples:

referring to fig. 1, a first aspect of the embodiments of the present application provides a laser sensor, which includes a sensor body and a rotating structure, where the sensor body is disposed on the rotating structure and can be driven by the rotating structure to rotate. Wherein, the sensor body can be selected as laser radar.

Referring to fig. 1 to 4, a second aspect of the present invention provides a rotating structure, which includes a fixed body 10, a rotating body 20, a rotating shaft 30 and a bearing 40.

The rotating body 20 is rotatable with respect to the fixed body 10, and the rotating shaft 30 is connected to the rotating body 20 such that the rotating shaft 30 is rotatable with respect to the fixed body 10 together with the rotating body 20. The rotating body 20 and the rotating shaft 30 may be integrally formed by injection molding, or may be separately connected by gluing, screwing, or screwing.

The bearing 40 is assembled to the fixing body 10, and the bearing 40 is sleeved on the rotating shaft 30, so that the rotating shaft 30 can rotate together with the rotating body 20 relative to the fixing body 10 under the action of the bearing 40. Specifically, as shown in fig. 1 and 3, the fixing body 10 is provided with an assembling hole 101, the bearing 40 is assembled in the assembling hole 101, and the bearing 40 is sleeved on the rotating shaft 30, so that the bearing 40 can support the rotating shaft 30.

A first fit clearance L is provided between the inner peripheral side of the bearing 40 and the outer peripheral side of the rotating shaft 30, and the range of the first fit clearance L is 0.005mm to 0.025mm; in other words, the diameter of the circle defined by the inner circumference of the bearing 40 is greater than the diameter of the circle defined by the outer circumference of the rotating shaft 30, and the size difference between the diameter of the bearing 40 and the diameter of the rotating shaft 30 ranges from 0.005mm to 0.025mm, so that there is a small assembly gap between the bearing 40 and the rotating shaft 30, and thus there is a good coaxiality between the bearing 40 and the rotating shaft 30. The first fit clearance L may be 0.006, 0.008, 0.009, 0.01, 0.011, 0.013, 0.015, 0.02, 0.021, 0.022, or the like, as long as it is in the range of 0.005mm to 0.025mm.

When the rotating structure is applied to a laser sensor, the sensor body is fixed to the rotating body 20 and can be driven by the rotating body 20 and the rotating shaft 30 to rotate relative to the fixed body 10.

According to the rotating structure provided by the embodiment of the application, the fixing body 10 and the rotating body 20 are assembled through the rotating shaft 30 and the bearing 40, and the fit clearance range between the inner periphery side of the bearing 40 and the outer periphery side of the rotating shaft 30 is 0.005 mm-0.025 mm, so that a smaller fit clearance is formed between the bearing 40 and the rotating shaft 30, the problem that the fit clearance between the rotating shaft 30 and each bearing 40 is large due to the fact that the coaxiality difference between a plurality of bearings 40 can be solved, better coaxiality is formed between the bearing 40 and the rotating shaft 30, the problem that the rotating shaft 30 inclines relative to the bearing 40 can be relieved, the rotating stability of the rotating shaft 30 and the rotating body 20 can be improved, and when the rotating structure is applied to a laser sensor, the pitch angle tolerance of the laser sensor is reduced. Correspondingly, the laser sensor provided by the embodiment of the application has the advantages that due to the adoption of the rotating structure, the fit clearance between the rotating shaft 30 and the bearing 40 is small, the rotating shaft 30 and the rotating body 20 have high rotating stability, and the problem of large pitch angle tolerance of the laser sensor can be solved.

In one embodiment, the first fitting clearance L ranges from 0.01mm to 0.02mm, and specifically, the first fitting clearance L may be 0.011, 0.012, 0.013, 0.015, 0.017, 0.019, or the like, as long as it is in the range of 0.01mm to 0.02mm. With such an arrangement, the size difference between the rotating shaft 30 and the bearing 40 is smaller, the fit clearance between the rotating shaft 30 and the bearing 40 is reduced, and the coaxiality between the bearing 40 and the rotating shaft 30 can be further improved, so as to improve the rotation stability of the rotating shaft 30 and the rotating body 20.

In one embodiment, the bearing 40 is an oil bearing. So set up, on the one hand for bearing 40 has seted up the microporous structure to can carry out oil through this microporous structure, like this, when pivot 30 rotated for fixed main part 10 with rotating body 20 in the lump, bearing 40 can slowly produce oil through the microporous structure above that in rotatory process, with realize lubricating, drag reduction effect effectively, and then help improving the rotation flexibility of pivot 30 and rotating body 20. When the bearing 40 discharges oil through the microporous structure, the oil can flow between the bearing 40 and the rotating shaft 30, so as to achieve the lubricating and drag-reducing effects between the bearing 40 and the rotating shaft 30, and further reduce the resistance of the rotating shaft 30 to the rotation of the bearing 40, that is, reduce the resistance caused by the small fit clearance between the rotating shaft 30 and the bearing 40. On the other hand, the oiliness bearing is the nonstandard spare, the oiliness bearing is when using, can design the axial dimensions of oiliness bearing according to the application demand of reality, so can improve the area of contact of oiliness bearing and pivot 30, and then improve the support dynamics of oiliness bearing to pivot 30, thereby do benefit to the rotational stability who improves pivot 30 and main rotating body 20, and thus, need not to set up a plurality of bearings 40, and then can solve the poor big problem of fit clearance that leads to between pivot 30 and the bearing 40 of a plurality of bearings 40's axiality, make the axiality that has the preferred between bearing 40 and the pivot 30, and then slow down the problem of pivot 30 for the slope of bearing 40.

In one embodiment, the oil bearing is configured to have an oil content in the range of 18% to 22%. It should be noted that, based on the range design of the first fit clearance L, a small fit clearance is provided between the outer circumferential side of the rotating shaft 30 and the inner circumferential side of the bearing 40, so that a large resistance is easily provided between the rotating shaft 30 and the bearing 40, and by configuring the oil content range of the oil-retaining bearing to be 18% to 22%, the resistance between the rotating shaft 30 and the bearing 40 can be effectively reduced by the oil amount coming out of the oil-retaining bearing, and thus the rotation flexibility of the rotating shaft 30 is improved on the basis of improving the coaxiality between the rotating shaft 30 and the bearing 40. The oil content of the oil-retaining bearing may be 19%, 20%, 21%, or the like, and may be in the range of 18% to 22%.

Wherein, when designing the oil-impregnated bearing, the oil content of the oil-impregnated bearing can be adjusted by adjusting the number and size of the micro-porous structure of the oil-impregnated bearing, that is, by changing the structure of the bearing 40, the oil content of the bearing 40 can be changed.

In one embodiment, as shown in fig. 1 to 3, the number of the bearings 40 is one, which can avoid the problem of poor coaxiality of the plurality of bearings 40, and thus help to maintain the coaxiality between the rotating shaft 30 and the bearings 40, so as to improve the rotational stability of the rotating shaft 30 and the rotating body 20 and reduce the pitch angle tolerance of the laser sensor. In addition, due to the arrangement of the single bearing 40, the use of materials is reduced, the cost is reduced, the assembly steps of the rotating structure are simplified in process, the bearing 40 only needs to be pressed into the fixing main body 10 once, and the process is simple, short in time consumption and low in cost.

In one embodiment, referring to fig. 3, 5 and 6, one end of the rotating shaft 30 along the axial direction is connected to the rotating body 20, and the outer periphery of the other end is provided with a first chamfer a, wherein the first chamfer a is a rounded corner, that is, the first chamfer a is a convex rounded corner. Specifically, when the rotating shaft 30 and the bearing 40 are assembled, one end of the rotating shaft 30, which is far away from the rotating body 20, is pressed into the bearing 40, so as to achieve the assembly between the rotating shaft 30 and the bearing 40, and one end of the rotating shaft 30, which is far away from the rotating body 20, is provided with a first chamfer a which is a round angle, which is helpful for preventing the rotating shaft 30 from scratching the bearing 40 when the rotating shaft 30 is installed in the bearing 40, so that the phenomenon that the bearing 40 is damaged to cause the bearing 40 to damage the supporting effect of the bearing 30 can be avoided, and when the bearing 40 is an oil-containing bearing, the phenomenon that the rotating shaft 30 scratches the bearing 40 to cause the oil-containing rate of the bearing 40 to change can also be avoided.

In one embodiment, referring to fig. 3, 5 and 7, the bearing 40 is provided with a second chamfer b at two opposite ends along the axial direction, and the second chamfer b is provided at the inner peripheral side of the bearing 40. For example, as shown in fig. 5 and 7, the two opposite end portions of the bearing 40 in the axial direction are an upper end portion and a lower end portion, respectively, and when the rotating shaft 30 is assembled to the bearing 40, the upper end portion of the bearing 40 is close to the rotating body 20 and the lower end portion is far from the rotating body 20. The inner peripheral side of the upper end portion and the inner peripheral side of the lower end portion of the bearing 40 are both provided with the second chamfer angle b, and the second chamfer angle b is set so that the inner peripheral side of the upper end portion of the bearing 40 is gradually enlarged upward in the axial direction and the inner peripheral side of the lower end portion of the bearing 40 is gradually enlarged downward in the axial direction, thereby facilitating the installation of the rotating shaft 30 into the bearing 40. The second chamfer b may be a C-shaped corner or a rounded corner.

In an embodiment, referring to fig. 3, 5 and 7, the bearing 40 is provided with third chamfers c at two opposite ends along the axial direction, and the third chamfers c are disposed at the outer circumferential side of the bearing 40. For example, as shown in fig. 5 and 7, the third chamfer c is provided on the outer peripheral side of the upper end portion of the bearing 40 and the outer peripheral side of the lower end portion of the bearing 40, and the third chamfer c is provided to facilitate the mounting of the bearing 40 into the stationary body 10. The third chamfer C may be a C-shaped corner or a rounded corner.

The bearing 40 may be provided with only the second chamfer b, only the third chamfer c, or both the second chamfer b and the third chamfer c.

In an embodiment, referring to fig. 2, fig. 3 and fig. 5, the rotating structure further includes a first gasket 50, and the first gasket 50 is sleeved outside the rotating shaft 30 and is supported between the bearing 40 and the rotating body 20 along the axial direction of the rotating shaft 30. It can be understood that, the first spacer 50 is used to isolate the rotating body 20 from the bearing 40, so that friction between the rotating body 20 and the bearing 40 during rotation can be avoided, thereby reducing resistance to rotation of the rotating body 20 relative to the bearing 40, and contributing to improving flexibility and stability of rotation of the rotating body 20 and the rotating shaft 30. The first spacer 50 is rotatable relative to the rotating shaft 30, that is, the first spacer 50 can be rotated properly by the rotating body 20 to maintain the rotational flexibility of the rotating body 20.

In an embodiment, referring to fig. 2, fig. 3, fig. 5 and fig. 6, the rotation structure further includes a limiting member 60, an annular groove 301 is formed on an outer peripheral side of an end of the rotation shaft 30 axially far away from the rotation body 20, the limiting member 60 is disposed around the rotation shaft 30 and is limited in the annular groove 301 along the axial direction of the rotation shaft 30, and the limiting member 60 further abuts against a side of the bearing 40 facing away from the rotation body 20 along the axial direction of the rotation shaft 30. It should be understood that the retaining member 60 is disposed at an end of the bearing 40 axially opposite to the first spacer 50, that is, the retaining member 60 and the first spacer 50 are disposed at an interval along the axial direction of the rotating shaft 30, and the bearing 40 is axially abutted between the first spacer 50 and the retaining member 60.

It should be noted that the limiting element 60 is axially limited in the annular groove 301 of the rotating shaft 30 and abuts against one side of the bearing 40 facing away from the rotating body 20, so that the axial limiting between the rotating shaft 30 and the bearing 40 is realized through the limiting element 60, the rotating shaft 30 can be prevented from being axially pulled out of the bearing 40, and the assembling stability and the firmness of the rotating shaft 30 and the bearing 40 can be improved.

Optionally, as shown in fig. 2, 3 and 5, the limiting member 60 is a snap spring, and the limiting member 60 is detachably snapped in the annular groove 301. So set up, when assembling bearing 40 and pivot 30, pack into bearing 40 with the one end of pivot 30 dorsad rotating body 20 earlier, then with the jump ring joint in ring channel 301, prevent that pivot 30 from extracting from bearing 40.

In an embodiment, referring to fig. 2, fig. 3 and fig. 5, the rotating structure further includes a second gasket 70, the second gasket 70 is sleeved outside the rotating shaft 30, and is supported between one end of the bearing 40 axially opposite to the rotating body 20 and the limiting member 60 along the axial direction of the rotating shaft 30.

Specifically, the second spacer 70 and the first spacer 50 are disposed at intervals along the axial direction of the rotating shaft 30, and are respectively disposed at two opposite ends of the bearing 40, that is, the bearing 40 is axially abutted between the first spacer 50 and the second spacer 70. The second spacer 70 abuts against one end of the bearing 40 axially opposite to the rotating body 20, so as to indirectly realize the abutting action of the limiting member 60 on the bearing 40.

It should be noted that, during the rotation of the rotating shaft 30 and the rotating body 20 relative to the fixed body 10, the limiting member 60 can rotate along with the rotating shaft 30. The second spacer 70 is disposed between the end of the bearing 40 opposite to the rotating body 20 and the limiting member 60, so as to realize isolation between the limiting member 60 and the bearing 40, and thus friction between the limiting member 60 and the bearing 40 can be avoided, so as to reduce resistance of the limiting member 60 to rotation of the bearing 40, further reduce resistance of relative rotation between the rotating body 20 and the fixed body 10, and contribute to improving flexibility and stability of rotation of the rotating body 20 and the rotating shaft 30. The second spacer 70 can rotate relative to the rotating shaft 30, that is, the second spacer 70 can rotate properly under the action of the limiting member 60, so as to maintain the rotational flexibility of the rotating shaft 30 and the rotating body 20.

The above-mentioned axial directions all refer to the direction Y illustrated in fig. 3, wherein the axial direction of the rotating shaft 30 is parallel to the axial direction of the bearing 40, and both refer to the above-mentioned axial directions, such as the direction Y illustrated in the figure.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A rotary structure, comprising:

a fixed body (10);

a rotating body (20) rotatable with respect to the stationary body (10);

a rotating shaft (30) connected to the rotating body (20);

a bearing (40) assembled to the fixed body (10) and sleeved on the rotating shaft (30); a first fit clearance (L) is provided between the inner peripheral side of the bearing (40) and the outer peripheral side of the rotating shaft (30), and the range of the first fit clearance (L) is 0.005 mm-0.025 mm.

2. The rotating structure according to claim 1, wherein the first fit clearance (L) ranges from 0.01mm to 0.02mm.

3. The rotating structure according to claim 1, wherein the bearing (40) is an oil-impregnated bearing, and the bearing (40) is configured such that an oil content thereof is in a range of 18% to 22%.

4. The rotating structure according to claim 3, wherein the number of the oil-impregnated bearings is one.

5. The rotating structure according to any one of claims 1 to 4, wherein one end portion of the rotating shaft (30) is connected to the rotating body (20), and an outer peripheral side of the other end portion is provided with a first chamfer (a), and the first chamfer (a) is a rounded corner.

6. The rotating structure according to any one of claims 1 to 4, wherein opposite end portions of the bearing (40) in the axial direction are each provided with a second chamfer (b) provided on an inner peripheral side of the bearing (40);

and/or third chamfers (c) are arranged at two opposite ends of the bearing (40) along the axial direction, and the third chamfers (c) are arranged on the outer peripheral side of the bearing (40).

7. The rotating structure according to any one of claims 1 to 4, further comprising a first gasket (50), wherein the first gasket (50) is sleeved outside the rotating shaft (30) and is supported between the bearing (40) and the rotating body (20) along the axial direction of the rotating shaft (30).

8. The rotating structure according to any one of claims 1 to 4, further comprising a limiting member (60), wherein an annular groove (301) is formed on an outer peripheral side of the rotating shaft (30), the limiting member (60) is disposed around the rotating shaft (30), is limited in the annular groove (301) along an axial direction of the rotating shaft (30), and abuts against a side of the bearing (40) facing away from the rotating body (20) along the axial direction of the rotating shaft (30).

9. The rotating structure according to claim 8, further comprising a second spacer (70), wherein the second spacer (70) is sleeved outside the rotating shaft (30) and abuts between the bearing (40) and the stopper (60) along the axial direction of the rotating shaft (30).

10. A laser sensor, comprising:

a sensor body;

the rotating structure according to any one of claims 1 to 9, said sensor body being mounted to said rotating body (20).

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