Rotating shaft structure and heliostat rotating shaft structure

Abstract

The utility model discloses a rotating shaft structure and a heliostat rotating shaft structure. The rotating shaft structure comprises a fixed support and a rotating support, a pin shaft is arranged between the fixed support and the rotating support in a penetrating mode, the fixed support is fixedly connected with the pin shaft through a fixing assembly, and the rotating support is rotationally connected with the pin shaft through a bearing. The heliostat rotating shaft structure comprises a heliostat torsion tube, a heliostat rotating frame and the rotating shaft structure, the heliostat torsion tube is a fixed support, and the heliostat rotating frame is a rotating support. The method has the beneficial effects that the precision requirement for component manufacturing is lowered, machining of part of components is avoided, and the manufacturing cost is lowered; a transmission gap is eliminated, and the motion precision is improved; and standardization and normalization of the parts are facilitated, the manufacturing cost of the standardized parts is reduced, and market application is improved.

Description

Technical Field

[0001] This application belongs to the technical field of rotary hinges, and specifically relates to a rotating shaft structure and a heliostat rotating shaft structure, which can be applied to heliostats in the field of solar energy utilization. Background Art

[0002] In the heliostat structure, at least two rotating shafts are always required to enable the mirror surface to face the desired direction. The rotating shafts can be various types of rotary speed reducers, or the change in the angle of the triangular hinge mechanism formed by the linear push rod stroke. Since the motion mechanism of the heliostat requires high motion accuracy, these hinge connections often mean very small shaft-hole fit clearances.

[0003] In the prior art, it is usually obtained by machining the parts of the mating holes (usually paired coaxial holes) after welding, so as to obtain high dimensional accuracy (IT7) and coaxiality (less than 0.04 mm). This undoubtedly raises the requirements for machine tools in component manufacturing and increases the manufacturing cost.

[0004] Reference Figure 1 And Figure 2 As shown in and , two situations of a typical hinge structure are shown: The structure is divided into a fixed bracket 1, a rotating bracket 2, a bearing 3, and a pin shaft 4. Usually, both the fixed bracket and the rotating bracket are called brackets. The fixed bracket and the pin shaft are fixedly connected, and the rotating bracket and the pin shaft achieve rotary motion through the bearing. Usually, the rotating shaft requires a certain span so that the mechanism can withstand the torque of the equipment. For the sake of manufacturing economy, a pair of coaxial shaft-hole fits usually appear in pairs to achieve this purpose. Thus, in the fixed bracket and the rotating bracket, a pair of shaft holes 11, called the first shaft hole and the second shaft hole, will appear. In order to achieve a smaller assembly clearance and at the same time ensure that the hinge structure can rotate easily, in the existing solutions, the holes of the rotating bracket and the fixed bracket need to be machined to ensure accuracy, that is, the geometric dimension accuracy of a single hole is usually IT7 or higher, and the coaxiality of a pair of holes is usually IT7 and higher, and the shaft-hole fit accuracy is usually H7 / f7 or higher. This undoubtedly increases the investment in equipment, prolongs the manufacturing cycle, and increases the manufacturing cost.

[0005] In fact, the connection between the fixed bracket and the pin shaft only needs to eliminate the clearance, as long as the fixation of the two is achieved and it does not have an adverse effect on the hinge between the pin shaft and the rotating bracket.

[0006] Reference Figure 3As shown, in some small and medium-sized heliostats, a "flange bushing 6" is adopted to achieve this purpose. There is a necessary assembly gap between the bushing part of this design and the pin shaft. The flange part is fixed to the bracket through bolts 7, and it is fixed to the bracket by means of the friction of the contact surface. In this scheme, since the flange contact surface is not perpendicular to the bushing shaft hole, it cannot be fully contacted during installation. In addition, the friction connection method may also cause movement between the flange bushing and the bracket due to reasons such as loosening of the fasteners, thus affecting the movement accuracy. Utility Model Content

[0007] The purpose of this application is to provide a rotating shaft structure and a heliostat rotating shaft structure, which solve the problems of high machining accuracy requirements for shaft-hole mating parts and high requirements for machine tools.

[0008] The purpose of this application is achieved through the following technical solutions:

[0009] A rotating shaft structure includes a fixed bracket and a rotating bracket. A pin shaft is jointly passed through between the fixed bracket and the rotating bracket. The fixed bracket and the pin shaft are fixedly connected through a fixing component, and the rotating bracket and the pin shaft are rotatably connected through a bearing.

[0010] Further, the pin shafts are arranged symmetrically left and right.

[0011] Further, the pin shaft includes a cylindrical section, and a bearing is provided between the cylindrical section and the rotating bracket.

[0012] Further, the cylindrical section is provided with a hardened surface.

[0013] Further, the fixing component includes an expansion sleeve. The pin shaft includes a frustum section, and an expansion sleeve is provided between the frustum section and the fixed bracket. The conical surface of the frustum section fits and matches with the conical inner surface of the expansion sleeve.

[0014] Further, the fixing component further includes a retaining ring and a locking nut. The pin shaft includes a screw head, and the locking nut is threadedly connected to the screw head. The locking nut squeezes the retaining ring inward, and the retaining ring squeezes the expansion sleeve inward.

[0015] Further, the retaining ring and the locking nut are of a split structure, or the retaining ring and the locking nut are of an integral structure.

[0016] Further, the screw head is a mechanical screw head or a hydraulic screw head.

[0017] Further, the expansion sleeve is provided with an expansion slit axially.

[0018] A heliostat rotating shaft structure includes a heliostat torsion tube and a heliostat rotating frame, and further includes the above-mentioned rotating shaft structure. The heliostat torsion tube is the fixed bracket, and the heliostat rotating frame is the rotating bracket.

[0019] This application uses a pin shaft with an expansion effect, which has the functions of fixed connection of a "pin" and rotational movement of a "shaft". It is installed on two components that need to perform rotational movement. Due to the large span of the rotating shaft, a pair of coaxial hinge connections are required, thus achieving:

[0020] 1. By separating the design of the "pin" and the "shaft", a more economical and reliable design is achieved.

[0021] 2. The part connected to the shaft: Usually a more economical component, which is machined to ensure dimensional accuracy and coaxiality; in the expansion pin, the shaft part is connected to this, and the shaft has high machining accuracy (IT7 or higher), surface roughness, and wear resistance.

[0022] 3. The part connected to the pin: The higher-value component only undergoes machining of the parts. After assembly, due to welding deformation, etc., the coaxiality of the paired holes is not good. However, through the expansion structure and the positioning function of the shaft connection component, the assembly gap between the pin shaft and the component can be eliminated.

[0023] Advantages of this application:

[0024] 1. Reduces the accuracy requirements for component manufacturing, avoids machining of some components, and reduces manufacturing costs.

[0025] 2. Eliminates transmission clearance and improves motion accuracy.

[0026] 3. Facilitates the standardization and specification of components, which is beneficial to reducing the manufacturing costs of standardized components and improving market application.

[0027] The main solution of the foregoing application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in this application; and in this application, (each non-conflicting alternative) can be freely combined with each other and with other alternatives. Those skilled in the art can understand that there are various combinations based on the prior art and common general knowledge after understanding this solution, all of which are the technical solutions to be protected in this application, and are not enumerated herein. Brief Description of the Drawings

[0028] Figure 1 is a schematic diagram of a typical hinge structure Figure 1 .

[0029] Figure 2 is a schematic diagram of a typical hinge structure Figure 2 .

[0030] Figure 3 is a schematic diagram of a flange bushing hinge structure.

[0031] Figure 4 is a schematic diagram of the structure of Embodiment 1 of this application.

[0032] Figure 5 It is a schematic structural diagram of the fixing component in Embodiment 1 of the present application.

[0033] Figure 6 It is a schematic structural diagram of the pin shaft in Embodiment 1 of the present application.

[0034] Figure 7 It is a schematic structural diagram of the expansion sleeve in Embodiment 1 of the present application

[0035] Figure 8 It is a schematic structural diagram of Embodiment 2 of the present application.

[0036] In the figure: 1 - fixing bracket, 2 - slewing bracket, 3 - bearing, 4 - pin shaft, 5 - fixing component, 6 - flange bushing, 7 - bolt, 11 - shaft hole, 41 - cylindrical section, 42 - hardened surface, 43 - frustum section, 44 - conical surface, 45 - screw head, 46 - mechanical screw head, 47 - hydraulic screw head, 48 - pin head, 51 - expansion sleeve, 52 - retaining ring, 53 - lock nut, 511 - conical inner surface, 512 - expansion joint, 8 - heliostat torsion tube, 9 - heliostat slewing frame. Detailed implementation manners

[0037] The present application will be further described below in conjunction with specific embodiments and the accompanying drawings.

[0038] Embodiment 1

[0039] Refer to Figures 3 to 7 As shown, a shaft structure includes a fixing bracket 1, a slewing bracket 2, a bearing 3, a pin shaft 4 and a fixing component 5. Both the fixing bracket 1 and the slewing bracket 2 are single, while the bearing 3, the pin shaft 4 and the fixing component 5 each include a set (two pieces). Two shaft holes 11 (coaxial) for installation are provided on both types of brackets.

[0040] A pin shaft 4 is commonly passed through between the fixing bracket 1 and the slewing bracket 2. The two pin shafts 4 are arranged symmetrically left and right to ensure that the bearing, the pin shaft and the fixing component appear in pairs and are on the same axis, and a very high coaxiality is formed. The fixing bracket 1 and the pin shaft 4 are fixedly connected through the fixing component 5, and the two need to be fixed to ensure the stability of the pin shaft 4. The slewing bracket 2 and the pin shaft 4 are rotatably connected through the bearing 3, and the two can rotate along the common axis of the pin shaft through the bearing.

[0041] The pin shaft 4 is an integral structure, including a pin head 48, a cylindrical section 41, a frustum section 43 and a screw head 45 arranged in sequence along the axis. The pin head 48 is a cylindrical structure with a diameter larger than the shaft hole 11, and it is clamped outside the slewing bracket 2 to achieve axial limit of the pin shaft 4.

[0042] The cylindrical section 41 is used to fixedly arrange the bearing 3. A bearing 3 is provided between the cylindrical section 41 and the shaft hole 11 of the slewing support 2 to realize the relative slewing movement of the slewing support 2 along the bearing 3. The cylindrical section 41 is provided with a hardened surface 42, with a hardness greater than 500 HV, a roughness lower than Ra0.4, a dimensional accuracy higher than IT7, and good anti-corrosion ability.

[0043] The frustum section 43 and the screw head 45 are used to fixedly arrange the fixing component. The frustum section 43 is used to fixedly arrange the expansion sleeve 51, and the frustum section 43 is provided with a conical surface 44 with a taper. The fixing component includes an expansion sleeve 51, a retaining ring 52, and a lock nut 53. The expansion sleeve 51 is a circular sleeve-like structure, and its inner circle is a conical inner surface 511 with the same taper as the tapered part of the pin shaft.

[0044] An expansion sleeve 51 is provided between the frustum section 43 and the fixed support 1. The conical surface 44 of the frustum section 43 fits and matches with the conical inner surface 511 of the expansion sleeve 51. The two conical surfaces preferably have an angle of ∠1:10 to ∠1:20 and maintain the same taper. The expansion sleeve 51 being inwardly squeezed fits and fastens with the frustum section 43 through the taper. At the same time, the tension of the taper acts on the inner wall of the shaft hole 11 outwardly, thereby realizing the fixation of the pin shaft 4 and the fixed support 1.

[0045] According to different usage situations, the expansion sleeve 51 may or may not have slots, that is, the expansion sleeve structure including expansion joints is also one of the options in this solution. When the expansion sleeve 51 is provided with an axially opened expansion joint 512, it is more conducive to the self-deformation and diameter expansion of the expansion sleeve 51.

[0046] The screw head 45 is used to fixedly arrange the lock nut 53. The lock nut 53 is threadedly connected to the screw head 45. As the lock nut 53 is screwed in and continuously squeezed inward, the lock nut 53 squeezes the retaining ring 52 inward, and the retaining ring 52 squeezes the expansion sleeve 51 inward, providing an inward acting force for the expansion sleeve 51 to enter.

[0047] The retaining ring 52 and the lock nut 53 are of a split structure, or the retaining ring 52 and the lock nut 53 are of an integral structure (nut with a flange), that is, the combination of the retaining ring and the lock nut into a nut with a flange is also one of the options in this solution.

[0048] The screw head 45 is a mechanical screw head 46 or a hydraulic screw head 47, that is, the threaded locking structure using a hydraulic method is also one of the options in this solution.

[0049] Embodiment 2

[0050] Reference Figure 8As shown in the figure, a heliostat rotating shaft structure, which is a typical connection structure in a heliostat, includes a heliostat torsion tube 8 and a heliostat slewing frame 9, and also includes the rotating shaft structure of Embodiment 1. The heliostat torsion tube 8 is a fixed bracket 1, and the heliostat slewing frame 9 is a slewing bracket 2. The connection between the two brackets is a pair of coaxial hinge parts (shaft-hole-bearing). In order to ensure as small a transmission clearance as possible, the shaft holes of the two components will be machined after being welded (surface anti-corrosion - such as hot-dip galvanizing).

[0051] Through the design of the above expansion pin, first ensure that the slewing frame is machined so that its shaft hole has good shaft hole dimensions and coaxiality of the two, and make the expansion pin part fit with it, and install a sliding bearing. The connection between the expansion pin and the torque tube is connected by a shrink fit sleeve to eliminate the clearance. Thus, the machining process of the torque tube is removed, thereby reducing the manufacturing cost.

[0052] The basic example of the present application and its various further selection examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in the present application. In the solution of the present application, each selection example can be arbitrarily combined with any basic example and selection example.

[0053] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotating shaft structure, comprising a fixed bracket (1) and a rotating bracket (2), characterized in that: A pin shaft (4) is commonly passed through between the described fixed support (1) and the slewing support (2). The fixed support (1) and the pin shaft (4) are fixedly connected through a fixing component (5), and the slewing support (2) and the pin shaft (4) are rotatably connected through a bearing (3).

2. The shaft structure according to claim 1, wherein: The described pin shaft (4) is arranged symmetrically left and right.

3. The shaft structure according to claim 1, wherein: The described pin shaft (4) includes a cylindrical section (41), and a bearing (3) is provided between the cylindrical section (41) and the slewing support (2).

4. The shaft structure according to claim 3, wherein: A hardened treatment surface (42) is provided on the described cylindrical section (41).

5. The shaft structure according to claim 1, wherein: The described fixing component includes a expansion sleeve (51). The pin shaft (4) includes a frustum section (43), and an expansion sleeve (51) is provided between the frustum section (43) and the fixed support (1). The conical surface (44) of the frustum section (43) is fitted and matched with the conical inner surface (511) of the expansion sleeve (51).

6. The shaft structure according to claim 5, characterized in that: The described fixing component further includes a retaining ring (52) and a locking nut (53). The pin shaft (4) includes a screw head (45). The locking nut (53) is threadedly connected to the screw head (45). The locking nut (53) presses the retaining ring (52) inward, and the retaining ring (52) presses the expansion sleeve (51) inward.

7. The shaft structure according to claim 6, characterized in that: The described retaining ring (52) and the locking nut (53) are of a split structure, or the retaining ring (52) and the locking nut (53) are of an integral structure.

8. The shaft structure according to claim 6, characterized in that: The described screw head (45) is a mechanical screw head (46) or a hydraulic screw head (47).

9. The rotating shaft structure according to claim 5, wherein: An expansion slit (512) is provided on the described expansion sleeve (51) axially.

10. A heliostat rotating shaft structure, comprising a heliostat torsion tube (8) and a heliostat rotary frame (9), characterized in that: It further includes a rotating shaft structure according to any one of claims 1 to 9. The heliostat torsion tube (8) is the fixed support (1), and the heliostat slewing frame (9) is the slewing support (2).

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