Rotary speed reducer and heliostat

Abstract

The invention provides a rotary speed reducer and a heliostat. The rotary speed reducer comprises a driving motor; the first end of the clutch assembly is in transmission connection with the output shaft of the driving motor; the transmission assembly is in transmission connection with the second end of the clutch assembly; wherein the second end of the clutch assembly is provided with a first limiting position and a second limiting position which are communicated with each other, and the clutch assembly is configured to be of a transmission configuration and a clutch configuration; in the transmission configuration, the clutch assembly is connected with the transmission assembly through the first limiting position, the clutch assembly is configured to be pre-compressed so that relative friction force can be generated between the clutch assembly and the transmission assembly, and the relative friction force is larger than driving force output by the driving motor output shaft to the clutch assembly during normal transmission. When the transmission assembly is blocked, the driving force output by the output shaft of the driving motor to the clutch assembly is gradually increased to be larger than the relative friction force, the transmission relation between the clutch assembly and the output shaft of the driving motor is relieved, and the clutch assembly is switched to the clutch structure.

Description

Technical Field

[0001] The invention belongs to the technical field of solar thermal power generation, and in particular relates to a rotary reducer and a heliostat. Background Art

[0002] Tower solar thermal power stations use directional reflectors (heliostats) to reflect sunlight and focus it on a central heat exchanger (absorber) to convert energy into electricity. To ensure the efficiency of solar energy utilization, heliostats track the sun through multi-axis rotation, including pitch, azimuth and roll angles. The azimuth direction of the heliostat is generally driven by a rotary reducer, and ensuring the continuous normal operation of the motor driven by the rotary reducer plays an important role in the stability of the heliostat system.

[0003] Most solar thermal power stations are located in environments with high solar energy resources and strong winds and sand. Due to the long-term harsh environment such as wind, sand, and low temperature, there are great challenges to the stable operation of the transmission structure between the motor and the worm gear and the heliostat's sun-tracking function. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a rotary reducer and a heliostat, which utilize a clutch assembly disposed between a transmission assembly and an output shaft of a drive motor to automatically disengage the transmission connection between the transmission assembly and the output shaft of the drive motor when the transmission is blocked, thereby solving the problem of motor stalling caused by factors such as wind, sand, and low temperature, and ensuring that the motor is not damaged.

[0005] The technical solution provided by the present invention is: a rotary reducer, comprising: Drive motor; A clutch assembly, a first end of which is drivingly connected to the output shaft of the drive motor; A transmission assembly is transmission-connected to the second end of the clutch assembly; wherein the second end of the clutch assembly is provided with a first limit position and a second limit position which are interconnected, and the clutch assembly is configured as a transmission configuration and a clutch configuration; In the transmission configuration, the clutch assembly is connected to the transmission assembly through the first limit position, and the clutch assembly is configured to be pre-compressed so that a relative friction force is generated between the clutch assembly and the transmission assembly, and the relative friction force is greater than the driving force output by the output shaft of the drive motor to the clutch assembly during normal transmission; When the transmission assembly is blocked, the driving force output by the output shaft of the drive motor to the clutch assembly gradually increases to be greater than the relative friction force, and the transmission assembly switches from being connected to the first limit position of the clutch assembly to being connected to the second limit position of the clutch assembly. At the same time, the clutch assembly makes an axial displacement to release the transmission relationship with the output shaft of the drive motor, and the clutch assembly switches to the clutch configuration.

[0006] Preferably, the clutch assembly includes a connecting clutch and a clutch spring, the first end of the connecting clutch is sleeved on the output shaft of the driving motor, the second end of the connecting clutch is sleeved on the first end of the transmission assembly, and a flange is provided on the outer periphery of the connecting clutch. When the transmission assembly is connected to the first limit position of the connecting clutch, the clutch spring is arranged between the driving motor and the flange and the clutch spring is sleeved on the clutch assembly.

[0007] Preferably, the first limit position and the second limit position are connected to form an L-shaped key groove, the short side of the L-shaped key groove is the first limit position and is perpendicular to the length extension direction of the connecting clutch, the long side of the L-shaped key groove is the second limit position and is parallel to the length extension direction of the connecting clutch, and the distance between the first end face of the first limit position and the first end of the connecting clutch is greater than the distance between the first end face of the second limit position and the first end of the connecting clutch; wherein, the first end face of the first limit position is the abutment face of the first limit position closest to the first end of the connecting clutch, and the first end face of the second limit position is the abutment face of the second limit position closest to the first end of the connecting clutch.

[0008] Preferably, in the transmission configuration, the clutch spring is configured to be pre-compressed so that the first end face of the first limit position elastically abuts against a transmission protrusion of the transmission assembly. When the driving motor drives the clutch assembly, the relative friction force between the first end face of the first limit position and a transmission protrusion of the transmission assembly drives the transmission assembly to rotate.

[0009] Preferably, the first end of the connecting clutch is provided with an arc-shaped keyway, and the outer wall of the output shaft of the driving motor is provided with a driving protrusion that cooperates with the arc-shaped keyway.

[0010] Preferably, the transmission assembly includes a worm and a worm wheel, the outer periphery of the worm is provided with a transmission lug, the worm is connected to the connecting clutch via the transmission lug, and the worm wheel and the worm are connected via a multi-tooth meshing transmission.

[0011] Based on the same concept, the present invention further provides a heliostat, comprising a heliostat body and a slewing reducer applied to any one of the above items, wherein the heliostat body is connected to a power output end of a transmission assembly of the slewing reducer.

[0012] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art: The present invention configures a clutch assembly capable of switching between a transmission configuration and a clutch configuration between the output shaft of the driving motor and the transmission assembly. When the transmission is blocked to a certain threshold, the clutch assembly can automatically switch from the transmission configuration to the clutch configuration, thereby releasing the transmission connection relationship and avoiding damage to the motor. Specifically, the core innovation of this embodiment is that, in the transmission configuration, the clutch assembly is configured to be pre-compressed so that the clutch assembly and the transmission assembly are in a mutually abutting and pressing state. When the output shaft of the driving motor rotates, there is a tendency for relative movement between the clutch assembly and the transmission assembly, thereby generating relative friction. When the transmission is not blocked, the relative friction is greater than the driving force output by the output shaft of the driving motor to the clutch assembly, so that the clutch assembly and the transmission assembly can remain relatively still to achieve normal transmission movement. When the transmission of the transmission assembly is blocked, the clutch assembly still rotates under the drive of the drive motor output shaft, thereby causing the torque of the motor relative to the transmission assembly to gradually increase until the output torque of the motor makes the driving force output by the motor output shaft to the clutch assembly greater than the relative friction force, thereby switching the transmission assembly from the first limit position connected to the clutch assembly to the second limit position connected to the clutch assembly. At this time, the clutch assembly makes an axial displacement to release the transmission relationship with the drive motor output shaft, and the drive motor output shaft can rotate freely without being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein: Figure 1 It is a cross-sectional view of the rotary reducer of the present invention; Figure 2 A schematic diagram of a clutch connection according to the present invention; Figure 3 This is a diagram of the motor worm connection structure in the normal operating state of the present invention; Figure 4 This is a diagram of the motor worm connection structure when the rotary reducer of the present invention is stuck; Figure 5 Schematic diagram of the heliostat of the present invention.

[0014] Description of reference numerals: 1: heliostat body; 2: rotary reducer; 3: column; 4: worm wheel; 5: worm; 501: transmission bump; 6: drive motor; 601: drive bump; 7: connection clutch; 701: first limit position; 702: second limit position; 703: arc keyway; 8: clutch spring; 9: box body. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0016] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0017] First embodiment This embodiment provides a rotary reducer 2, comprising: Driving motor 6; A clutch assembly, a first end of which is drivingly connected to the output shaft of the drive motor 6; A transmission assembly is transmission-connected to the second end of the clutch assembly; wherein the second end of the clutch assembly is provided with a first limit position 701 and a second limit position 702 which are interconnected, and the clutch assembly is configured as a transmission configuration and a clutch configuration; In the transmission configuration, the clutch assembly is connected to the transmission assembly via the first limit position 701, and the clutch assembly is configured to be pre-compressed so that a relative friction force is generated between the clutch assembly and the transmission assembly, and the relative friction force is greater than the driving force output by the output shaft of the drive motor 6 to the clutch assembly during normal transmission; When the transmission assembly is blocked, the driving force output by the output shaft of the drive motor 6 to the clutch assembly gradually increases to be greater than the relative friction force, and the transmission assembly switches from being connected to the first limit point 701 of the clutch assembly to being connected to the second limit point 702 of the clutch assembly. At the same time, the clutch assembly makes an axial displacement to release the transmission relationship with the output shaft of the drive motor 6, and the clutch assembly switches to the clutch configuration.

[0018] In this embodiment, a clutch assembly capable of switching between a transmission configuration and a clutch configuration is configured between the output shaft of the drive motor 6 and the transmission assembly. When the transmission is blocked to a certain threshold, the clutch assembly can automatically switch from the transmission configuration to the clutch configuration, thereby releasing the transmission connection relationship and avoiding damage to the motor. Specifically, the core innovation of this embodiment is that, in the transmission configuration, the clutch assembly is configured to be pre-compressed so that the clutch assembly and the transmission assembly are in a mutually abutting and pressing state. When the output shaft of the drive motor 6 rotates, there is a tendency for relative movement between the clutch assembly and the transmission assembly, thereby generating relative friction. When the transmission is not blocked, the relative friction is greater than the driving force output by the output shaft of the drive motor 6 to the clutch assembly, so that the clutch assembly and the transmission assembly can remain relatively stationary to achieve normal transmission movement. When the transmission of the transmission assembly is blocked, since the clutch assembly still rotates under the drive of the output shaft of the drive motor 6, the torque of the motor relative to the transmission assembly gradually increases until the output torque of the motor makes the driving force output by the motor output shaft to the clutch assembly greater than the relative friction force, so that the transmission assembly switches from being connected to the first limit point 701 of the clutch assembly to being connected to the second limit point 702 of the clutch assembly. At this time, the clutch assembly makes an axial displacement to release the transmission relationship with the output shaft of the drive motor 6, and the output shaft of the drive motor 6 can rotate freely without being blocked.

[0019] This embodiment adopts a technical solution of mechanical direct switching. Compared with collecting the output parameters of the motor through sensors and then using software to determine whether the motor is blocked and then outputting control instructions to control the motor to stop rotating, the control method is more direct and almost no intermediate information processing process is required. Instead, the judgment and the release of the transmission connection relationship are made directly, which is quick to respond and more reliable. By reasonably selecting design parameters such as the friction between the clutch assembly and the transmission assembly, the friction between the clutch assembly and the transmission assembly can be moderate during normal transmission, which not only ensures the transmission efficiency but also reduces energy loss. At the same time, when the transmission assembly is blocked, it can be switched to the clutch configuration in time to avoid motor blockage and damage.

[0020] See also Figure 1 Preferably, the clutch assembly includes a connecting clutch 7 and a clutch spring 8, the first end of the connecting clutch 7 is sleeved on the output shaft of the driving motor 6, the second end of the connecting clutch 7 is sleeved on the first end of the transmission assembly, and a flange is provided on the outer periphery of the connecting clutch 7. When the transmission assembly is connected to the first limit point 701 of the connecting clutch 7, the clutch spring 8 is arranged between the driving motor 6 and the flange and the clutch spring 8 is sleeved on the clutch assembly.

[0021] The technical solution of this embodiment provides a specific implementation of a clutch assembly, including a connecting clutch 7 and a clutch spring 8. A flange is provided on the outer periphery of the connecting clutch 7. When the transmission assembly is connected to the first limit point 701 of the connecting clutch 7, the clutch spring 8 is arranged between the drive motor 6 and the flange in a compressed state. The elastic force generated by the clutch spring 8 causes the connecting clutch 7 and the transmission assembly to be pressed and abutted against each other.

[0022] See also Figure 2 Preferably, the first limit position 701 and the second limit position 702 are connected to form an L-shaped key groove, the short side of the L-shaped key groove is the first limit position 701 and is perpendicular to the length extension direction of the connecting clutch 7, the long side of the L-shaped key groove is the second limit position 702 and is parallel to the length extension direction of the connecting clutch 7, and the distance between the first end face of the first limit position 701 and the first end of the connecting clutch 7 is greater than the distance between the first end face of the second limit position 702 and the first end of the connecting clutch 7; wherein, the first end face of the first limit position 701 is the abutting face of the first limit position 701 closest to the first end of the connecting clutch 7, and the first end face of the second limit position 702 is the abutting face of the second limit position 702 closest to the first end of the connecting clutch 7.

[0023] See also Figure 2 This embodiment provides a specific implementation of the first limit position 701 and the second limit position 702. The first end surface of the first limit position 701 abuts against the transmission component and provides relative friction for driving the transmission. When the transmission component is blocked, the connecting clutch 7 is still driven by the output shaft of the driving motor 6 to continue to rotate, so that the transmission component lags behind the first limit position 701 and slides to the second limit position 702. The elastic force of the clutch spring 8 at this time drives the connecting clutch 7 to move axially, and then the first end of the connecting clutch 7 releases the transmission relationship with the motor output shaft, and the motor rotates freely. Figure 2 , the first end surface of the first limit position 701 is the surface of the short side of the L-shaped keyway closest to the connection clutch 7, and the first end surface of the second limit position 702 is the surface of the long side of the L-shaped keyway closest to the connection clutch 7. Of course, based on the same concept, the connected keyway including the first limit position 701 and the second limit position 702 can also be in other shapes as long as the switching of the transmission configuration and the clutch configuration can be achieved.

[0024] Preferably, in the transmission configuration, the clutch spring 8 is configured to be pre-compressed so that the first end surface of the first limit point 701 elastically abuts against a transmission protrusion 501 of the transmission assembly. When the drive motor 6 drives the clutch assembly, the relative friction force between the first end surface of the first limit point 701 and a transmission protrusion 501 of the transmission assembly drives the transmission assembly to rotate.

[0025] The technical solution of this embodiment is based on the fact that the clutch spring 8 is configured to provide elastic force for pre-compression so that the first section of the first limit position 701 elastically abuts against a transmission protrusion 501 of the transmission assembly, thereby generating relative friction to achieve effective transmission.

[0026] Preferably, the first end of the connecting clutch 7 is provided with an arc-shaped keyway 703 , and the outer wall of the output shaft of the driving motor 6 is provided with a driving protrusion that cooperates with the arc-shaped keyway 703 .

[0027] The technical solution of this embodiment provides a specific implementation method for the transmission connection between the clutch 7 and the output shaft of the drive motor 6. The arc key groove 703 can not only realize the transmission connection, but also enable the drive protrusion to effectively exit the arc key groove 703 when the transmission connection between the clutch 7 and the output shaft of the drive motor 6 is released.

[0028] Preferably, the transmission assembly includes a worm 5 and a worm wheel 4, the outer periphery of the worm 5 is provided with a transmission protrusion 501, the worm 5 is connected to the connecting clutch 7 via the transmission protrusion 501, and the worm wheel 4 and the worm 5 are connected via a multi-tooth meshing transmission.

[0029] The technical solution of this embodiment provides a composition embodiment of a transmission assembly, and the worm 5 is connected with the multi-tooth meshing transmission of the turbine to make the transmission relationship more stable and reliable.

[0030] See also Figure 3 and Figure 4 , respectively showing the state diagrams between the various components of the transmission configuration and the clutch configuration.

[0031] Embodiment 2 See also Figure 5 This embodiment provides a heliostat, including a heliostat body 1 and a rotary reducer 2 applied to any one of the above items, wherein the heliostat body 1 is connected to a power output end of a transmission assembly of the rotary reducer 2.

[0032] Its outstanding feature is that it adopts the rotary reducer 2 of the above-mentioned embodiment 1. Since solar thermal power stations are mostly located in environments with high solar energy resources and strong winds and sand, the heliostat can automatically disengage the transmission connection between the transmission component and the output shaft of the drive motor 6 when the transmission is blocked, thereby solving the motor blocking problem caused by factors such as wind, sand, and low temperature, and ensuring that the motor is not damaged.

[0033] See also Figure 1 The rotary reducer is arranged in the rotary reducer housing 9.

[0034] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A rotary reducer, characterized in that: include: Drive motor; A clutch assembly, a first end of which is drivingly connected to the output shaft of the drive motor; A transmission assembly is transmission-connected to the second end of the clutch assembly; wherein the second end of the clutch assembly is provided with a first limit position and a second limit position which are interconnected, and the clutch assembly is configured as a transmission configuration and a clutch configuration; In the transmission configuration, the clutch assembly is connected to the transmission assembly through the first limit position, and the clutch assembly is configured to be pre-compressed so that a relative friction force is generated between the clutch assembly and the transmission assembly, and the relative friction force is greater than the driving force output by the output shaft of the drive motor to the clutch assembly during normal transmission; When the transmission assembly is blocked, the driving force output by the output shaft of the drive motor to the clutch assembly gradually increases to be greater than the relative friction force, and the transmission assembly switches from being connected to the first limit position of the clutch assembly to being connected to the second limit position of the clutch assembly. At the same time, the clutch assembly makes an axial displacement to release the transmission relationship with the output shaft of the drive motor, and the clutch assembly switches to the clutch configuration.

2. The rotary reducer according to claim 1, characterized in that: The clutch assembly includes a connecting clutch and a clutch spring. The first end of the connecting clutch is sleeved on the output shaft of the driving motor, and the second end of the connecting clutch is sleeved on the first end of the transmission assembly. A flange is provided on the outer periphery of the connecting clutch. When the transmission assembly is connected to the first limit position of the connecting clutch, the clutch spring is arranged between the driving motor and the flange and the clutch spring is sleeved on the clutch assembly.

3. The rotary reducer according to claim 2, characterized in that: The first limit position and the second limit position are connected to form an L-shaped key groove, the short side of the L-shaped key groove is the first limit position and is perpendicular to the length extension direction of the connection clutch, the long side of the L-shaped key groove is the second limit position and is parallel to the length extension direction of the connection clutch, and the distance between the first end surface of the first limit position and the first end of the connection clutch is greater than the distance between the first end surface of the second limit position and the first end of the connection clutch; The first end surface of the first limit position is the abutment surface of the first limit position closest to the first end of the connecting clutch, and the first end surface of the second limit position is the abutment surface of the second limit position closest to the first end of the connecting clutch.

4. The rotary reducer according to claim 3, characterized in that: In the transmission configuration, the clutch spring is configured to be pre-compressed so that the first end face of the first limit position elastically abuts against a transmission protrusion of the transmission assembly. When the driving motor drives the clutch assembly, the relative friction force between the first end face of the first limit position and a transmission protrusion of the transmission assembly drives the transmission assembly to rotate.

5. The rotary reducer according to claim 2, characterized in that: The first end of the connecting clutch is provided with an arc-shaped keyway, and the outer wall of the output shaft of the driving motor is provided with a driving protrusion matched with the arc-shaped keyway.

6. The rotary reducer according to claim 2, characterized in that: The transmission assembly comprises a worm and a worm wheel. The outer periphery of the worm is provided with a transmission lug. The worm is connected to the connection clutch via the transmission lug. The worm wheel and the worm are connected via a multi-tooth meshing transmission.

7. A heliostat, characterized in that: It comprises a heliostat body and a slewing reducer as claimed in any one of claims 1 to 6, wherein the heliostat body is connected to a power output end of a transmission assembly of the slewing reducer.

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