High-stability laser radar driving rotating shaft structure
By setting two groups of bearings in the lidar drive rotation shaft, and setting a wave-shaped gasket and shock-absorbing pads between the two groups of bearings, the problem of easy eccentric damage to the rotation shaft in the prior art is solved, and higher stability and service life are achieved.
Patent Information
- Application Number
- CN202420608229.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The existing lidar drive rotary shaft is supported by only two bearings, which easily leads to eccentric damage, increasing maintenance and repair costs.
A lidar-driven rotation shaft structure including a central shaft and a shaft sleeve is designed. By setting two groups of bearings in the shaft sleeve, and setting a wave-shaped gasket and shock-absorbing rubber pads between the two groups of bearings, the stability and concentricity during rotation operation are improved.
It effectively improves stability and concentricity during rotational operation, reduces the possibility of eccentric damage, extends service life, and reduces maintenance and repair costs.
Smart Images
Figure CN222599827U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of laser radar drive shafts, in particular to a laser radar drive rotating shaft structure with high stability. Background Art
[0002] When the laser radar is in operation, it needs to rotate continuously, and the rotation speed can reach more than one thousand revolutions per minute. If the durability and operation stability of the laser radar shaft do not meet the requirements, it will lead to a short service life and increase the frequency, time and cost of subsequent maintenance. Therefore, there are very high requirements for the durability of the laser radar shaft and the stability of the rotation operation.
[0003] The existing rotating shafts used to drive laser radars are supported by two bearings at a certain distance from each other. This support structure gives the rotating shaft a certain stability and concentricity. However, since the laser radar is located at the top of the rotating shaft and is heavy, supporting the rotating shaft with only two bearings can easily cause the rotating shaft to be eccentric, and the bearings near the top are easily damaged, increasing the maintenance and repair costs of the laser radar. Utility Model Content
[0004] The purpose of the utility model is to provide a laser radar driving rotating shaft structure with high stability, aiming to improve the existing rotating shaft for driving the laser radar, which supports the rotating shaft only by two bearings. Since the laser radar is located at the top of the rotating shaft, its weight is large, which can easily cause the rotating shaft to be eccentric, and the bearings near the top are easily damaged, thereby increasing the maintenance cost of the laser radar.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a laser radar driving rotating shaft structure with high stability, including a center shaft and a sleeve, the upper end of the sleeve is provided with a small-diameter cylindrical hole, and the lower end is provided with a large-diameter cylindrical hole, and the small-diameter cylindrical hole and the large-diameter cylindrical hole share a common center axis; at least a first bearing and a second bearing are arranged in the small-diameter cylindrical hole, and at least a third bearing and a fourth bearing are arranged in the large-diameter cylindrical hole, and the outer diameters of the third bearing and the fourth bearing are the same and are both larger than the outer diameters of the first bearing and the second bearing; the center shaft passes through the sleeve, and each bearing is connected to the center shaft in cooperation; the upper end of the center shaft is provided with a shaft end cover, and the lower end is provided with a connecting shaft rod for connecting to the rotating shaft of the driving motor, and the center shaft, the shaft end cover and the connecting shaft rod rotate synchronously.
[0006] Furthermore, a threaded rod structure is provided at the upper and lower ends of the central shaft, the shaft end cover is threadedly connected to the threaded rod structure at the upper end of the central shaft, and the threaded rod structure at the upper end of the central shaft passes through the shaft end cover; the connecting shaft rod is sleeved on the lower end of the central shaft and is threadedly connected to the threaded rod structure provided at the lower end of the central shaft.
[0007] Furthermore, the shaft end cover is in a truncated cone shape, and the diameter of the upper end is larger than the diameter of the lower end. There is a certain gap between the shaft end cover and the shaft sleeve, and the upper end of the shaft end cover protrudes from the upper end port of the shaft sleeve.
[0008] Furthermore, the first bearing is located above the second bearing, a corrugated gasket and a shock-absorbing rubber pad are arranged between the first bearing and the second bearing, and a shock-absorbing rubber pad is arranged between the first bearing and the shaft end cover.
[0009] Furthermore, the third bearing is located above the fourth bearing, and a corrugated gasket and a shock-absorbing rubber pad are arranged between the third bearing and the fourth bearing.
[0010] Furthermore, the outer diameter of the corrugated gasket is smaller than the inner diameter of the shock-absorbing rubber pad, the corrugated gasket is connected to the inner ring of the connected bearing, and the shock-absorbing rubber pad is connected to the outer ring of the connected bearing.
[0011] Furthermore, the shaft end cover presses the first bearing and the second bearing, so that the corrugated gasket and the shock-absorbing rubber pad arranged in the small-diameter cylindrical hole of the sleeve are in a compressed state; the connecting shaft rod presses the third bearing and the fourth bearing, so that the corrugated gasket and the shock-absorbing rubber pad arranged in the large-diameter cylindrical hole of the sleeve are in a compressed state.
[0012] Furthermore, a connecting through hole is provided between the small-diameter cylindrical hole and the large-diameter cylindrical hole of the sleeve, and the connecting through hole is a cylindrical through hole structure, and the central axis passes through the connecting through hole.
[0013] Furthermore, the aperture of the lower end of the small-diameter cylindrical hole is the same as the outer diameter of the second bearing, the aperture of the upper end of the connecting through hole is larger than the outer diameter of the inner ring of the second bearing and smaller than the aperture of the small-diameter cylindrical hole, and the inner wall of the sleeve forms a first retaining ring portion at the position where the connecting through hole and the small-diameter cylindrical hole are connected, and the first retaining ring portion is used to limit the outer ring of the second bearing.
[0014] Furthermore, the aperture of the large diameter cylindrical hole is the same as the outer diameter of the third bearing, the aperture of the lower end of the connecting through hole is larger than the outer diameter of the inner ring of the third bearing and smaller than the aperture of the large diameter cylindrical hole, and the inner wall of the sleeve forms a second retaining ring portion at the position where the connecting through hole and the large diameter cylindrical hole are connected, and the second retaining ring portion is used to limit the outer ring of the third bearing.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. The utility model sets two sets of bearings, one above and one below, at a certain distance from each other, and the outer diameter of the lower set of bearings is larger than that of the upper set of bearings, which effectively improves the stability during rotation operation, and has higher concentricity and is not easy to be eccentric. The bearings close to the top are also not easy to be damaged, which makes the service life of the utility model longer and reduces the maintenance and repair costs of the laser radar in the later stage.
[0017] 2. A corrugated gasket and a shock-absorbing rubber pad are arranged between the two groups of bearings of the utility model, and the corrugated gasket and the shock-absorbing rubber pad are in a compressed state, which improves the shock-absorbing effect of the utility model and makes the noise and vibration small during the operation of the utility model.
[0018] 3. The shaft end cover of the utility model is fixed on the central shaft by means of a threaded connection, and there is a certain gap between the shaft end cover and the shaft sleeve. After the shaft end cover is assembled, the shaft end cover protrudes from the port of the shaft sleeve, which effectively avoids friction between the laser radar base and the shaft sleeve.
[0019] 4. The utility model is provided with a shaft sleeve, and each bearing is arranged inside the shaft sleeve, which facilitates the installation of the laser radar base and improves the assembly efficiency of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0021] Figure 2 It is a three-dimensional structural schematic diagram of the utility model when the shaft sleeve is removed;
[0022] Figure 3 It is a schematic diagram of the explosion structure of the utility model;
[0023] Figure 4 It is a three-dimensional structural schematic diagram of the utility model when the shaft sleeve, the second bearing, the fourth bearing and the connecting shaft rod are removed.
[0024] In the figure: 1. center shaft; 2. sleeve; 3. first bearing; 4. second bearing; 5. third bearing; 6. fourth bearing; 7. shaft end cover; 8. connecting shaft rod; 9. corrugated gasket; 10. shock-absorbing rubber pad. DETAILED DESCRIPTION
[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0026] The following is a further description with reference to the accompanying drawings and specific embodiments:
[0027] A laser radar driving rotating shaft structure with high stability, such as Figure 1-Figure 3 As shown, it includes a central shaft 1 and a sleeve 2. The upper end of the sleeve 2 is provided with a small-diameter cylindrical hole, and the lower end is provided with a large-diameter cylindrical hole. There is a connecting through hole between the small-diameter cylindrical hole and the large-diameter cylindrical hole. The connecting through hole is a cylindrical through hole structure. The aperture of the connecting through hole is smaller than the aperture of the small-diameter cylindrical hole. The aperture of the small-diameter cylindrical hole is smaller than the aperture of the large-diameter cylindrical hole. The small-diameter cylindrical hole, the large-diameter cylindrical hole and the connecting through hole share a central axis. The central shaft 1 passes through the small-diameter cylindrical hole, the connecting through hole and the large-diameter cylindrical hole. A first bearing 3 and a second bearing 4 are provided in the small-diameter cylindrical hole of the sleeve 2. The first bearing 3 and the second bearing 4 are two identical bearings. The outer diameters of the first bearing 3 and the second bearing 4 are the same as the aperture of the small-diameter cylindrical hole. The first bearing 3 and the second bearing 4 are both assembled on the central shaft 1. A third bearing 5 and a fourth bearing 6 are arranged in the large diameter cylindrical hole of the sleeve 2. The third bearing 5 and the fourth bearing 6 are two identical bearings. The outer diameters of the third bearing 5 and the fourth bearing 6 are the same as the aperture of the large diameter cylindrical hole, and are both larger than the outer diameters of the first bearing 3 and the second bearing 4. The third bearing 5 and the fourth bearing 6 are also assembled on the center shaft 1.
[0028] In some exemplary embodiments, in addition to the first bearing 3 and the second bearing 4, the small-diameter cylindrical hole of the sleeve 2 is also provided with other bearings that are the same as the first bearing 3 and the second bearing 4. Similarly, in addition to the third bearing 5 and the fourth bearing 6, the large-diameter cylindrical hole of the sleeve 2 is also provided with other bearings that are the same as the third bearing 5 and the fourth bearing 6. In other words, three or more bearings can be provided in both the small-diameter cylindrical hole and the large-diameter cylindrical hole of the sleeve 2.
[0029] like Figure 1-4As shown, the first bearing 3 is located above the second bearing 4, and a corrugated gasket 9 and a shock-absorbing rubber pad 10 are arranged between the first bearing 3 and the second bearing 4. The third bearing 5 is located above the fourth bearing 6, and a corrugated gasket 9 and a shock-absorbing rubber pad 10 are also arranged between the third bearing 5 and the fourth bearing 6. The upper and lower ends of the central shaft 1 are both provided with a threaded rod structure, and a shaft end cover 7 is threadedly installed on the threaded rod structure at the upper end of the central shaft 1, and a shock-absorbing rubber pad 10 is also arranged between the first bearing 3 and the shaft end cover 7. The shaft end cover 7 presses the first bearing 3 and the second bearing 4, so that the corrugated gasket 9 and the shock-absorbing rubber pad 10 between the first bearing 3 and the second bearing 4 of the sleeve 2 and the shock-absorbing rubber pad 10 between the shaft end cover 7 and the first bearing 3 are all in a compressed state. The aperture of the upper end of the connecting through hole is larger than the outer diameter of the inner ring of the second bearing 4, and the inner wall of the sleeve 2 forms a first retaining ring portion at the position where the connecting through hole and the small-diameter cylindrical hole are connected, and the first retaining ring portion is used to limit the outer ring of the second bearing 4. The threaded rod structure at the upper end of the central shaft 1 passes through the shaft end cover 7. The shaft end cover 7 is truncated cone-shaped, and its upper end diameter is larger than the lower end diameter. There is a certain gap between the shaft end cover 7 and the sleeve 2, and the upper end of the shaft end cover 7 protrudes from the upper port of the sleeve 2.
[0030] like Figure 1-4 As shown, the lower end of the central shaft 1 is provided with a connecting shaft 8 for connecting with the rotating shaft of the driving motor. The connecting shaft 8 is sleeved on the lower end of the central shaft 1 and is threadedly connected with the threaded rod structure provided at the lower end of the central shaft 1. Therefore, the upper end and the lower end of the central shaft 1 are respectively threadedly connected with the shaft end cover 7 and the connecting shaft 8, and the central shaft 1, the shaft end cover 7 and the connecting shaft 8 rotate synchronously. The connecting shaft 8 presses the third bearing 5 and the fourth bearing 6, so that the corrugated gasket 9 and the shock-absorbing rubber pad 10 between the third bearing 5 and the fourth bearing 6 are in a compressed state. The outer diameter of the corrugated gasket 9 is smaller than the inner diameter of the shock-absorbing rubber pad 10, the corrugated gasket 9 is connected to the inner ring of the connected bearing, and the shock-absorbing rubber pad 10 is connected to the outer ring of the connected bearing. The aperture of the lower end of the connecting through hole is larger than the outer diameter of the inner ring of the third bearing 5, and the inner wall of the sleeve 2 forms a second retaining ring portion at the position where the connecting through hole is connected to the large-diameter cylindrical hole, and the second retaining ring portion is used to limit the outer ring of the third bearing 5.
[0031] The working principle of the utility model is as follows: the connecting shaft 8 is connected to the rotating shaft of the driving motor, and the upper end of the central shaft 1 is connected to the base of the laser radar. When the driving motor rotates, its rotating shaft drives the connecting shaft 8 to rotate, and the connecting shaft 8 drives the central shaft 1 to rotate, thereby driving the laser radar to rotate. The utility model is provided with a sleeve 2, and each bearing is arranged inside the sleeve 2, which facilitates the installation of the laser radar base and improves the assembly efficiency of the whole machine. The utility model is provided with two sets of bearings, one above and one below, in the height direction. The bearings in each set of bearings are installed close to each other, and the two sets of bearings are arranged at a distance, and the outer diameter of the lower set of bearings is larger than the outer diameter of the upper set of bearings, which effectively improves the stability during the rotation operation, and the concentricity is higher, not easy to be eccentric, and the bearings close to the top are not easy to be damaged, so that the service life of the utility model is longer, and the maintenance and repair costs of the laser radar in the later stage are reduced. A corrugated gasket 9 and a shock-absorbing rubber pad 10 are arranged between the two sets of bearings of the utility model, and the corrugated gasket 9 and the shock-absorbing rubber pad 10 are in a compressed state, which improves the shock-absorbing effect of the utility model, so that the noise and vibration of the utility model during operation are small. In addition, the shaft end cover 7 of the utility model is fixed to the central shaft 1 by means of a threaded connection, and there is a certain gap between the shaft end cover 7 and the shaft sleeve 2. After the shaft end cover 7 is assembled, the shaft end cover 7 protrudes from the port of the shaft sleeve 2, effectively avoiding friction between the laser radar base and the shaft sleeve 2.
[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A laser radar driving rotating shaft structure with high stability, comprising a central shaft (1) and a shaft sleeve (2), characterized in that: The upper end of the sleeve (2) is provided with a small-diameter cylindrical hole, and the lower end is provided with a large-diameter cylindrical hole, and the small-diameter cylindrical hole and the large-diameter cylindrical hole share a central axis; at least a first bearing (3) and a second bearing (4) are provided in the small-diameter cylindrical hole, and at least a third bearing (5) and a fourth bearing (6) are provided in the large-diameter cylindrical hole, and the outer diameters of the third bearing (5) and the fourth bearing (6) are the same, and both are larger than the outer diameters of the first bearing (3) and the second bearing (4); the central shaft (1) passes through the sleeve (2), and each bearing is connected to the central shaft (1); the upper end of the central shaft (1) is provided with a shaft end cover (7), and the lower end is provided with a connecting shaft (8) for connecting to the rotating shaft of the driving motor, and the central shaft (1), the shaft end cover (7) and the connecting shaft (8) rotate synchronously.
2. The laser radar driving rotating shaft structure with high stability according to claim 1, characterized in that: The upper and lower ends of the central shaft (1) are both provided with threaded rod structures; the shaft end cover (7) is threadably connected to the threaded rod structure at the upper end of the central shaft (1), and the threaded rod structure at the upper end of the central shaft (1) passes through the shaft end cover (7); the connecting shaft (8) is sleeved on the lower end of the central shaft (1) and is threadably connected to the threaded rod structure provided at the lower end of the central shaft (1).
3. The laser radar driving rotating shaft structure with high stability according to claim 2, characterized in that: The shaft end cover (7) is in the shape of a truncated cone, and the diameter of the upper end is larger than the diameter of the lower end. There is a certain gap between the shaft end cover (7) and the shaft sleeve (2), and the upper end of the shaft end cover (7) protrudes from the upper end of the shaft sleeve (2).
4. The laser radar driving rotating shaft structure with high stability according to claim 1, characterized in that: The first bearing (3) is located above the second bearing (4); a corrugated gasket (9) and a shock-absorbing rubber pad (10) are arranged between the first bearing (3) and the second bearing (4); and a shock-absorbing rubber pad (10) is arranged between the first bearing (3) and the shaft end cover (7).
5. The laser radar driving rotating shaft structure with high stability according to claim 4, characterized in that: The third bearing (5) is located above the fourth bearing (6), and a corrugated gasket (9) and a shock-absorbing rubber pad (10) are provided between the third bearing (5) and the fourth bearing (6).
6. The laser radar driving rotating shaft structure with high stability according to claim 5, characterized in that: The outer diameter of the corrugated gasket (9) is smaller than the inner diameter of the shock-absorbing rubber pad (10); the corrugated gasket (9) is connected to the inner ring of the connected bearing; and the shock-absorbing rubber pad (10) is connected to the outer ring of the connected bearing.
7. The laser radar driving rotating shaft structure with high stability according to claim 6, characterized in that: The shaft end cover (7) presses the first bearing (3) and the second bearing (4), so that the corrugated gasket (9) and the shock-absorbing rubber pad (10) arranged in the small-diameter cylindrical hole of the shaft sleeve (2) are in a compressed state; the connecting shaft rod (8) presses the third bearing (5) and the fourth bearing (6), so that the corrugated gasket (9) and the shock-absorbing rubber pad (10) arranged in the large-diameter cylindrical hole of the shaft sleeve (2) are in a compressed state.
8. The laser radar driving rotating shaft structure with high stability according to claim 1, characterized in that: A connecting through hole is provided between the small-diameter cylindrical hole and the large-diameter cylindrical hole of the shaft sleeve (2); the connecting through hole is a cylindrical through hole structure, and the central axis (1) passes through the connecting through hole.
9. The laser radar driving rotating shaft structure with high stability according to claim 8, characterized in that: The aperture of the small-diameter cylindrical hole is the same as the outer diameter of the second bearing (4); the aperture of the upper end of the connecting through hole is larger than the outer diameter of the inner ring of the second bearing (4) and smaller than the aperture of the small-diameter cylindrical hole; the inner wall of the sleeve (2) forms a first retaining ring portion at a position where the connecting through hole and the small-diameter cylindrical hole meet, and the first retaining ring portion is used to limit the outer ring of the second bearing (4).
10. The laser radar driving rotating shaft structure with high stability according to claim 8, characterized in that: The aperture of the large-diameter cylindrical hole is the same as the outer diameter of the third bearing (5); the aperture of the lower end of the connecting through hole is larger than the outer diameter of the inner ring of the third bearing (5) and smaller than the aperture of the large-diameter cylindrical hole; the inner wall of the sleeve (2) forms a second retaining ring portion at a position where the connecting through hole and the large-diameter cylindrical hole meet, and the second retaining ring portion is used to limit the outer ring of the third bearing (5).