Photovoltaic push rod with single-thrust bearing capable of bearing biaxial force

Abstract

The utility model relates to the technical field of photovoltaic push rods, and discloses a photovoltaic push rod with a single thrust bearing capable of bearing biaxial force, which comprises a telescopic rod, a screw rod and a thrust bearing, the telescopic rod is connected with the screw rod through an upper nut, the bottom end of the screw rod penetrates through the thrust bearing and is connected with a tail end cover through a positioning bearing, a guide sleeve is mounted on the screw rod, and the guide sleeve is connected with the screw rod through a positioning bearing. The guide sleeve is movably connected with the thrust bearing in an abutting mode, the thrust bearing is installed in the bearing fixing base, the bearing fixing base is installed in the reduction gearbox, the tail end cover is installed at the bottom of the reduction gearbox, and the bearing fixing base is connected with the tail end cover through a screw. The thrust bearing can adapt to axial loads in the inner direction and the outer direction by continuously converting stress surfaces, and normal operation of the photovoltaic push rod in the whole life cycle is guaranteed; the problem that when a traditional thrust bearing bears axial loads in two directions, balls in a retainer are prone to loosening is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of photovoltaic push rods, and more specifically, to a photovoltaic push rod with a single thrust bearing capable of withstanding biaxial forces. Background Technology

[0002] Currently, most photovoltaic linear actuators on the market are affected by the environment and need to withstand both axial thrust and tensile loads to cope with the weight of the bracket and the wind resistance around it. Since photovoltaic electric linear actuators started earlier and the product technology has gradually matured, coupled with the influence of the market economy, a low-cost, high-performance photovoltaic linear actuator is particularly important in the increasingly fierce industry competition.

[0003] When traditional thrust bearings are subjected to axial loads in both internal and external directions, the balls riveted in the cage will gradually loosen, the cage will wear rapidly, and the product life will be greatly reduced. In the long-term bidirectional load alternation environment, there is a risk of gearbox breakage due to material fatigue. Due to this limitation, traditional photovoltaic actuators mostly use two thrust bearings, which is costly and has low space utilization. Utility Model Content

[0004] The purpose of this invention is to provide a photovoltaic push rod with a single thrust bearing capable of withstanding dual axial forces, aiming to solve the problem in the prior art where the balls in the cage of a traditional thrust bearing are prone to loosening when subjected to axial loads in two directions.

[0005] This invention is implemented as follows: a photovoltaic push rod capable of withstanding biaxial forces with a single thrust bearing includes a telescopic rod, a screw, and a thrust bearing. The telescopic rod and the screw are connected by an upper nut. The bottom end of the screw passes through the thrust bearing and is connected to the tail end cover via a positioning bearing. A guide sleeve is installed on the screw, and the guide sleeve movably abuts against the thrust bearing. The thrust bearing is installed in a bearing fixing seat, which is installed in a gearbox. The tail end cover is installed on the bottom of the gearbox, and the bearing fixing seat and the tail end cover are connected by screws.

[0006] Furthermore, the bearing mounting base and the tail end cover are arranged vertically at intervals, and the thrust bearing is located between the bearing mounting base and the tail end cover.

[0007] Furthermore, the thrust bearing includes an upper ring, a cage, and a lower ring. The cage contains a plurality of balls, which are arranged circumferentially around the balls. The upper and lower rings are arranged vertically relative to each other, forming a rotational gap. The cage is located in the rotational gap. The upper and lower sides of the balls movably abut against the upper and lower rings, respectively. The top surface of the upper ring abuts against the inner wall of the bearing housing.

[0008] Furthermore, the bottom of the upper ring has an inwardly concave upper groove, and the top of the lower ring has an inwardly concave lower groove. A raceway is formed between the lower groove and the upper groove, and the outer side of the ball abuts against the inner sidewall of the raceway.

[0009] Furthermore, the cage includes an upper rotating frame and a lower rotating frame, which are connected by multiple positioning posts. Multiple roller grooves are formed between the upper and lower rotating frames, and the multiple roller grooves are arranged at intervals around the circumference of the cage. The balls are located in the roller grooves, and the upper and lower sides of the balls are exposed outside the roller grooves.

[0010] Furthermore, the screw is connected to a final stage gear that is connected to the drive motor, the guide sleeve is located between the final stage gear and the thrust bearing, and a sleeve is fitted on the screw, the sleeve being located between the final stage gear and the upper nut.

[0011] Furthermore, the outer periphery of the guide sleeve is provided with an upper retaining ring, the bottom of which abuts against the top of the upper ring, and the upper retaining ring is located between the upper ring and the final stage gear.

[0012] Furthermore, the final stage gear meshes with the drive motor via a reduction gear assembly.

[0013] Furthermore, a spline nut is connected to the screw, and a lower retaining ring is protruding from the outer periphery of the spline nut. The top of the lower retaining ring abuts against the bottom of the lower ring, and the lower retaining ring is located between the lower ring and the positioning bearing.

[0014] Furthermore, a retaining washer is connected to the spline nut, and the retaining washer is fixed to the bottom of the lower retaining ring by a lower nut, which is threadedly connected to the screw.

[0015] Compared with the prior art, the single thrust bearing provided by this utility model can withstand photovoltaic push rods with biaxial forces. The thrust bearing can adapt to axial loads in both internal and external directions by continuously changing the force-bearing surface, ensuring the normal operation of the photovoltaic push rod throughout its entire life cycle. Moreover, the gearbox does not participate in the transmission of axial loads, avoiding the risk of gearbox breakage due to material fatigue in a long-term biaxial load alternating environment. It also solves the problem that the balls in the cage of traditional thrust bearings are prone to loosening when bearing axial loads in both directions. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a photovoltaic push rod with a single thrust bearing capable of withstanding biaxial forces, provided by this utility model.

[0017] Figure 2This is a cross-sectional structural diagram of a photovoltaic push rod with a single thrust bearing capable of withstanding biaxial forces, provided by this utility model.

[0018] Figure 3 This is a three-dimensional exploded view of a photovoltaic push rod with a single thrust bearing capable of withstanding biaxial forces, provided by this utility model.

[0019] Figure 4 This is a top-view exploded perspective view of the thrust bearing provided by this utility model;

[0020] Figure 5 This is a bottom-view exploded perspective view of the thrust bearing provided by this utility model.

[0021] In the diagram: telescopic rod 10, screw 20, thrust bearing 30, bearing mounting seat 40, gearbox 50, tail end cover 60, drive motor 70, reduction gear assembly 80, screw 90, upper nut 21, positioning bearing 22, guide sleeve 23, final stage gear 24, sleeve 25, spline nut 26, lower nut 27, upper retaining ring 231, lower retaining ring 261, stop washer 262, upper ring 41, retainer 42, lower ring 43, ball 44, upper groove 411, upper rotating frame 421, lower rotating frame 422, positioning pin 423, roller groove 424, lower groove 431. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Reference Figure 1-5 The image shown is a preferred embodiment of the present invention.

[0026] A photovoltaic actuator with a single thrust bearing 30 capable of withstanding biaxial forces includes a telescopic rod 10, a screw 20, and a thrust bearing 30. The telescopic rod 10 and the screw 20 are connected by an upper nut 21. The bottom end of the screw 20 passes through the thrust bearing 30 and is connected to the tail end cover 60 through a positioning bearing 22. A guide sleeve 23 is installed on the screw 20, and the guide sleeve 23 movably abuts against the thrust bearing 30. The thrust bearing 30 is installed in a bearing fixing seat 40, which is installed in a gearbox 50. The tail end cover 60 is installed on the bottom of the gearbox 50, and the bearing fixing seat 40 and the tail end cover 60 are connected by screws 90.

[0027] The single thrust bearing 30 provided above can withstand photovoltaic push rods with biaxial forces. The thrust bearing 30 can adapt to axial loads in both internal and external directions by continuously changing the force-bearing surface, ensuring the normal operation of the photovoltaic push rod throughout its entire life cycle. Furthermore, the gearbox 50 does not participate in the transmission of axial loads, avoiding the risk of gearbox 50 breaking due to material fatigue in a long-term biaxial load alternating environment. This solves the problem that the balls 44 in the cage 42 of the traditional thrust bearing 30 are prone to loosening when bearing axial loads in both directions.

[0028] When the telescopic rod 10 is subjected to an outward pulling force, the load is transmitted through the telescopic rod 10 to the upper nut 21, the upper nut 21 to the screw 20, the screw 20 to the thrust bearing 30, the thrust bearing 30 to the bearing mounting seat 40, and finally acts on the 6 screws 90 that lock the bearing mounting seat 40.

[0029] As the telescopic rod 10 retracts inward under load, it drives the screw 20 to rotate. At this time, the lower ring 43 of the thrust bearing 30 and the ball 44 retainer 42 rotate simultaneously, while the upper ring 41 remains stationary. When the telescopic rod 10 is subjected to an inward thrust, the load is transmitted through the telescopic rod 10 to the upper nut 21, the upper nut 21 to the screw 20, the screw 20 to the guide sleeve 23, the guide sleeve 23 to the thrust bearing 30, and finally acts on the tail end cap 60.

[0030] As the telescopic rod 10 extends outward under load, it drives the screw 20 to rotate. At this time, the upper ring 41 of the thrust bearing 30 and the ball 44 and the cage 42 rotate simultaneously, while the lower ring 43 remains stationary.

[0031] In summary, the optimized photovoltaic actuator, with its thrust bearing 30, can adapt to axial loads in both internal and external directions by continuously changing the force-bearing surface, ensuring the normal operation of the photovoltaic actuator throughout its entire lifespan.

[0032] In this embodiment, the bearing mounting base 40 and the tail end cover 60 are arranged vertically at intervals, and the thrust bearing 30 is located between the bearing mounting base 40 and the tail end cover 60. In this way, the bearing mounting base 40 can better apply the axial load to the tail end cover 60.

[0033] In this embodiment, the thrust bearing 30 includes an upper ring 41, a cage 42, and a lower ring 43. The cage 42 is provided with a plurality of balls 44, which are arranged circumferentially around the balls 44. The upper ring 41 and the lower ring 43 are arranged vertically relative to each other, forming a rotational gap. The cage 42 is located in the rotational gap. The upper and lower sides of the balls 44 movably abut against the upper ring 41 and the lower ring 43, respectively. The top surface of the upper ring 41 abuts against the inner wall of the bearing mounting seat 40.

[0034] The bottom of the upper ring 41 has an inwardly concave upper groove 411, and the top of the lower ring 43 has an inwardly concave lower groove 431. A raceway is formed between the lower groove 431 and the upper groove 411, and the outer side of the ball 44 abuts against the inner sidewall of the raceway.

[0035] The thrust bearing 30 eliminates the traditional riveted metal cage 42, using an upper ring 41 and a lower ring 43 in conjunction with the cage 42 to fix the balls 44 of the thrust bearing 30, with an appropriate clearance. After all the balls 44 are installed in the cage 42, the upper ring 41 and the lower ring 43 are closed on the upper and lower sides of the cage 42, allowing the balls 44 to rotate freely in the raceway and preventing them from falling out. This allows the upper ring 41 and the lower ring 43 to rotate independently, enabling the thrust bearing 30 to adapt to axial loads in both internal and external directions by continuously changing the force-bearing surface, ensuring the normal operation of the photovoltaic push rod throughout its entire life cycle. The distinction between the inner diameter of the shaft ring and the seat ring of the thrust bearing 30 is eliminated, and their inner diameters are adjusted to be consistent, allowing for arbitrary assembly. This avoids the risk of reduced product life caused by reverse installation of the shaft ring and the seat ring, and an appropriate clearance is set between them to prevent shaking or wear during rotation.

[0036] In this embodiment, the retainer 42 includes an upper rotating frame 421 and a lower rotating frame 422. The upper rotating frame 421 and the lower rotating frame 422 are connected by a plurality of positioning posts 423. A plurality of roller grooves 424 are formed between the upper rotating frame 421 and the lower rotating frame 422. The plurality of roller grooves 424 are arranged at intervals around the circumference of the retainer 42. The balls 44 are located in the roller grooves 424, and the upper and lower sides of the balls 44 are exposed outside the roller grooves 424 respectively.

[0037] The thrust bearing 30 eliminates the traditional riveted metal cage 42, using an upper rotating cage 421 and a lower rotating cage 422 to fix the balls 44 of the thrust bearing 30, and sets an appropriate clearance. After all the balls 44 are installed in multiple grooves 424, the upper rotating cage 421 and the lower rotating cage 422 are closed to form the cage 42, which is fixed by a positioning pin 423 and a reverse buckle, allowing the balls 44 to rotate freely within the cage 42 and preventing them from falling out. The distinction between the inner diameter of the shaft ring and the seat ring of the thrust bearing 30 is eliminated, and their inner diameters are adjusted to be consistent, allowing them to be assembled arbitrarily. This avoids the risk of reduced product life caused by reverse installation of the shaft ring and the seat ring, and sets an appropriate clearance between them and the mating parts to prevent shaking or wear during rotation.

[0038] In this embodiment, a final gear 24 that is connected to the drive motor 70 is connected to the screw 20. The guide sleeve 23 is located between the final gear 24 and the thrust bearing 30. A sleeve 25 is sleeved on the screw 20. The sleeve 25 is located between the final gear 24 and the upper nut 21.

[0039] As the telescopic rod 10 retracts inward under load, the drive motor 70 drives the screw 20 to rotate through the reduction gear assembly 80 in the reduction gearbox 50. At this time, the lower ring 43 of the thrust bearing 30 and the ball 44 retainer 42 rotate simultaneously, while the upper ring 41 remains stationary. When the telescopic rod 10 is subjected to an inward thrust, the load is transmitted through the telescopic rod 10 to the upper nut 21, the upper nut 21 to the screw 20, the screw 20 to the sleeve 25, the sleeve 25 to the final gear 24, the final gear 24 to the guide sleeve 23, the guide sleeve 23 to the thrust bearing 30, and finally acts on the tail end cover 60.

[0040] In this embodiment, an upper retaining ring 231 protrudes from the outer periphery of the guide sleeve 23. The bottom of the upper retaining ring 231 abuts against the top of the upper ring 41, and the upper retaining ring 231 is located between the upper ring 41 and the final stage gear 24. In this way, the guide sleeve 23 can transmit the load to the upper ring 41 of the thrust bearing 30 through the upper retaining ring 231.

[0041] In this embodiment, the final stage gear 24 meshes with the drive motor 70 through a reduction gear assembly 80. This prevents the reduction gearbox 50 from participating in the transmission of axial loads, avoiding the risk of the reduction gearbox 50 breaking due to material fatigue in a long-term bidirectional load alternating environment.

[0042] In this embodiment, a spline nut 26 is connected to the screw 20. A lower retaining ring 261 protrudes from the outer periphery of the spline nut 26. The top of the lower retaining ring 261 abuts against the bottom of the lower ring 43. The lower retaining ring 261 is located between the lower ring 43 and the positioning bearing 22. In this way, the spline nut 26 can transmit the load to the lower ring 43 of the thrust bearing 30 through the lower retaining ring 261.

[0043] In this embodiment, a retaining washer 262 is connected to the spline nut 26. The retaining washer 262 is fixed to the bottom of the lower retaining ring 261 by a lower nut 27, which is threadedly connected to the screw 20. In this way, the spline nut 26 can be fixed to the screw 20 by the lower nut 27 and the retaining washer 262.

[0044] When the telescopic rod 10 is subjected to an outward pulling force, the load is transmitted through the telescopic rod 10 to the upper nut 21, the upper nut 21 to the screw 20, the screw 20 to the spline nut 26, the spline nut 26 to the thrust bearing 30, the thrust bearing 30 to the bearing mounting seat 40, and finally acts on the six 13-M8 screws 90 that lock the bearing mounting seat 40.

[0045] As the telescopic rod 10 retracts inward under load, the drive motor 70 drives the screw 20 to rotate through the reduction gear assembly 80 in the reduction gearbox 50. At this time, the lower ring 43 of the thrust bearing 30 and the ball 44 retainer 42 rotate simultaneously, while the upper ring 41 remains stationary. When the telescopic rod 10 is subjected to an inward thrust, the load is transmitted through the telescopic rod 10 to the upper nut 21, the upper nut 21 to the screw 20, the screw 20 to the sleeve 25, the sleeve 25 to the final gear 24, the final gear 24 to the guide sleeve 23, the guide sleeve 23 to the thrust bearing 30, and finally acts on the tail end cover 60.

[0046] When the telescopic rod 10 extends outward under load, the drive motor 70 drives the screw 20 to rotate through the reduction gear assembly 80 in the reduction gearbox 50. At this time, the upper ring 41 of the thrust bearing 30 and the ball 44 retainer 42 rotate simultaneously, while the lower ring 43 remains stationary.

[0047] In summary, the optimized photovoltaic actuator allows the thrust bearing 30 to adapt to axial loads in both internal and external directions by continuously changing the force-bearing surface, ensuring the normal operation of the photovoltaic actuator throughout its entire lifespan. Furthermore, the gearbox 50 does not participate in the transmission of axial loads, avoiding the risk of gearbox 50 breakage due to material fatigue in long-term bidirectional load alternation environments. In contrast, with traditional thrust bearings 30, when subjected to axial loads in both internal and external directions, the balls 44 riveted within the cage 42 gradually loosen, causing the cage 42 to wear rapidly and significantly reducing product lifespan. Due to this limitation, traditional photovoltaic actuators mostly use two thrust bearings 30, resulting in high cost and low space utilization. Compared to the photovoltaic actuator with the improved thrust bearing 30, the overlap ratio must be reduced for matching at the same installation distance, leading to relatively lower performance.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A photovoltaic actuator with a single thrust bearing capable of withstanding biaxial forces, characterized in that, The device includes a telescopic rod, a screw, and a thrust bearing. The telescopic rod and the screw are connected by an upper nut. The bottom end of the screw passes through the thrust bearing and is connected to the tail end cover via a positioning bearing. A guide sleeve is installed on the screw, and the guide sleeve movably abuts against the thrust bearing. The thrust bearing is installed in a bearing mounting seat, which is installed in a gearbox. The tail end cover is installed on the bottom of the gearbox, and the bearing mounting seat and the tail end cover are connected by screws.

2. The photovoltaic push rod capable of withstanding biaxial forces with a single thrust bearing as described in claim 1, characterized in that, The bearing mounting base and the tail end cover are arranged vertically at intervals, and the thrust bearing is located between the bearing mounting base and the tail end cover.

3. The photovoltaic push rod with a single thrust bearing capable of withstanding biaxial forces as described in claim 1, characterized in that, The thrust bearing includes an upper ring, a cage, and a lower ring. The cage contains a plurality of balls, which are arranged circumferentially around the balls. The upper and lower rings are arranged vertically relative to each other, forming a rotational gap. The cage is located in the rotational gap. The upper and lower sides of the balls respectively movably abut against the upper and lower rings. The top surface of the upper ring abuts against the inner wall of the bearing housing.

4. The photovoltaic push rod capable of withstanding biaxial forces with a single thrust bearing as described in claim 3, characterized in that, The bottom of the upper ring has an inwardly concave upper groove, and the top of the lower ring has an inwardly concave lower groove. A raceway is formed between the lower groove and the upper groove, and the outer side of the ball abuts against the inner sidewall of the raceway.

5. The photovoltaic push rod capable of withstanding biaxial forces with a single thrust bearing as described in claim 4, characterized in that, The cage includes an upper rotating frame and a lower rotating frame, which are connected by multiple positioning posts. Multiple roller grooves are formed between the upper and lower rotating frames, and the roller grooves are arranged at intervals around the circumference of the cage. The balls are located in the roller grooves, and the upper and lower sides of the balls are exposed outside the roller grooves.

6. The photovoltaic push rod capable of withstanding biaxial forces with a single thrust bearing as described in any one of claims 3 to 5, characterized in that, The screw is connected to a final stage gear that is connected to the drive motor. The guide sleeve is located between the final stage gear and the thrust bearing. A sleeve is fitted on the screw, and the sleeve is located between the final stage gear and the upper nut.

7. The photovoltaic push rod capable of withstanding biaxial forces with a single thrust bearing as described in claim 6, characterized in that, The guide sleeve has an upper retaining ring protruding from its outer periphery. The bottom of the upper retaining ring abuts against the top of the upper ring. The upper retaining ring is located between the upper ring and the final stage gear.

8. The photovoltaic push rod capable of withstanding biaxial forces with a single thrust bearing as described in claim 6, characterized in that, The final stage gear meshes with the drive motor via a reduction gear assembly.

9. The photovoltaic push rod capable of withstanding biaxial forces with a single thrust bearing as described in claim 7, characterized in that, A spline nut is connected to the screw, and a lower retaining ring is protruding from the outer periphery of the spline nut. The top of the lower retaining ring abuts against the bottom of the lower ring, and the lower retaining ring is located between the lower ring and the positioning bearing.

10. The photovoltaic push rod capable of withstanding biaxial forces with a single thrust bearing as described in claim 9, characterized in that, A retaining washer is connected to the spline nut. The retaining washer is fixed to the bottom of the lower retaining ring by a lower nut, which is threadedly connected to the screw.

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