Stage lamp with improved sealing stability

Abstract

The utility model relates to a stage lamp of promoting sealing stability, including the lamp head with the light emission, the arm pivoted in the lamp head and the machine case of supporting arm, and the arm and the machine case pass through the rotation subassembly and pivot each other between, rotation subassembly includes: centre pivot, shaft sleeve, and the shaft sleeve and centre pivot rotatable coaxially each other, and the shaft sleeve can select fixedly connected in the machine case or arm, and the centre pivot is connected in another component correspondingly, sealing ring, the outer periphery of sleeve is established in the shaft sleeve, makes the rotation subassembly and the machine case and / or arm sealed between, support bearing, the outer periphery of sleeve is connected in the shaft sleeve, and the outer ring of support bearing is opposite fixed with the machine case or arm, makes support bearing to the shaft sleeve constitute radial support. The utility model improves the support structure of rotation subassembly, solves the sealing failure problem of uneven stress of the rotating part under heavy load or side hanging working condition in the prior art, and further promotes the sealing reliability of stage lamp under a variety of application scenarios.

Description

Technical Field

[0001] This utility model relates to the field of stage lighting technology, and in particular to a stage light that improves sealing stability. Background Technology

[0002] Stage lights, especially moving head lights with high integration and power, are becoming increasingly larger and heavier, while the requirements for waterproof and dustproof performance are also becoming more stringent. To achieve waterproofing, current designs generally use sealing rings at key joints such as the chassis and arm, and the light head and arm.

[0003] However, traditional sealing structures face significant challenges for large and heavy stage lights. When the light fixture is side-mounted, its substantial weight generates a tipping moment. This moment causes rotating components to tilt slightly, resulting in uneven pressure distribution between the components and the sealing ring: excessive pressure on one side accelerates wear, while gaps may appear on the other side, compromising the seal's integrity. This problem is further exacerbated by the centrifugal force generated when the light head or arm rotates at high speed.

[0004] Prolonged uneven stress can cause permanent deformation of the sealing ring, eventually leading to seal failure. This allows rainwater and dust to penetrate the equipment, contaminating lubricated components and seriously threatening the safety of core electronic components such as the drive board and control board, significantly shortening the equipment's lifespan. Therefore, developing a rotary sealing structure that can withstand uneven torque and ensure long-term stability and reliability is a current technical challenge in the stage lighting industry. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, this utility model provides a stage light that improves sealing stability. It aims to solve the sealing failure problem caused by uneven stress on the rotating parts under heavy load or side hanging conditions in the prior art by improving the support structure of the rotating components, thereby improving the sealing reliability of the stage light in various application scenarios.

[0006] This utility model discloses a stage light with improved sealing stability, comprising a lamp head that emits light, an arm pivotally connected to the lamp head, and a housing supporting the arm. The arm and the housing are pivotally connected to each other via a rotating assembly. The rotating assembly includes:

[0007] Central axis;

[0008] A bushing, which is rotatably and coaxially connected to a central shaft, is optionally fixedly connected to the chassis or arm, and the central shaft is correspondingly connected to another component;

[0009] A sealing ring is fitted around the outer periphery of the bushing to seal the rotating assembly with the chassis and / or arm;

[0010] A support bearing is fitted onto the outer circumference of the bushing. The outer ring of the support bearing is fixed relative to the chassis or the arm, so that the support bearing provides radial support to the bushing.

[0011] Specifically, the key feature of this invention is that the rotating assembly also includes a support bearing. The inner ring of this support bearing is fitted onto the outer circumference of the bushing, located near the sealing ring. Unlike the internal bearing used for rotation, the outer ring of this support bearing is securely connected to the housing / arm via a direct or indirect means, such as through a large bearing ring. During operation, when the weight of the arm and lamp head generates a tilting moment due to side mounting, or centrifugal force during high-speed rotation, these loads, which would otherwise cause the bushing to tilt or radially deflect, are transmitted through the bushing to the inner ring of the support bearing. Because the outer ring of the support bearing is firmly fixed to the rigid housing, it provides a strong external radial support point for the bushing. These loads are then effectively transferred and distributed across the overall structure of the housing through the support bearing, thereby suppressing the tilting and deflection of the bushing.

[0012] As a preferred embodiment of this utility model, the rotating assembly further includes:

[0013] Install the collar and securely connect it to the chassis or the arm;

[0014] The outer ring of the support bearing and the outer ring of the sealing ring both abut against the inner wall of the mounting ring.

[0015] As a preferred embodiment of this utility model, the rotating assembly further includes a bearing pressure plate;

[0016] The mounting ring is provided with a receiving groove for accommodating the support bearing, and its inner sidewall abuts against the outer ring of the support bearing;

[0017] The bearing pressure plate is fixedly abutted against the end face of the mounting ring and presses the outer ring of the support bearing tightly at the position of the receiving groove.

[0018] As a preferred embodiment of this utility model, the mounting collar is further provided with a mounting groove for mounting at least part of the sealing ring, and the outer ring of the sealing ring abuts against the inner sidewall of the mounting groove.

[0019] As a preferred embodiment of this utility model, the outer periphery of the bushing is provided with a bushing step for supporting the inner ring of the support bearing;

[0020] The rotating assembly also includes a bearing end cap;

[0021] The bearing end cap is sleeved on the end of the bushing, and the bearing end cap and the stepped surface of the bushing step are clamped together on the inner ring of the supporting bearing from opposite sides.

[0022] As a preferred embodiment of the present invention, the rotating assembly further includes at least two inner bearings; each of the inner bearings is axially spaced and sleeved between the bushing and the central shaft;

[0023] The inner side of the middle cover plate of the bearing end cap abuts against the outer ring of one of the inner bearings at the end position of the bushing.

[0024] As a preferred embodiment of this utility model, the outer circumference of the central shaft is integrally formed with a first rotating shaft step for supporting the inner ring of the inner bearing;

[0025] The rotating assembly also includes an upper pressure plate, which is coaxially sleeved on the central shaft and located away from the first rotating shaft step;

[0026] The inner bearings are spaced apart by bushings, and each inner bearing and bushing is clamped between the upper pressure plate and the first rotating shaft step.

[0027] As a preferred embodiment of the present invention, it further includes a drive assembly for driving the bushing to rotate around the central axis. The drive assembly includes a driven wheel fixedly connected to the central axis, a transmission belt, and a motor fixed relative to the bushing. The driven wheel is driven to the motor via the transmission belt.

[0028] As a preferred embodiment of the present invention, the chassis includes a bottom plate and at least two side cover plates disposed on the bottom plate and connected to each other.

[0029] One end of the central shaft is fixed to the base plate, and the other end extends out of the chassis towards the arm;

[0030] The bushing is fixedly connected to the horizontal support of the arm.

[0031] The support bearing is fixedly connected to the chassis via a mounting bracket; the mounting bracket is connected to the end of each side cover plate away from the base plate.

[0032] As a preferred embodiment of this utility model, a fixed base is provided on the base plate, and the central shaft is integrally formed / fixedly connected to the fixed base.

[0033] As a preferred embodiment of this utility model, one end of the bushing is connected to the horizontal support, and the other end extends into the interior of the housing and is pivotally connected to the central shaft, and both the sealing ring and the support bearing are located inside the housing.

[0034] As a preferred embodiment of this utility model, the outer circumference of the central shaft is integrally formed with a second rotating shaft step; a positioning piece fixedly sleeved on the central shaft is provided between the outer side of the middle cover plate of the bearing end cover and the second rotating shaft step.

[0035] The rotation angle range of the bushing is limited by the radial flange on the outer periphery of the positioning piece;

[0036] Among them, the positioning piece abuts against the outer side of the middle cover plate of the bearing end cover and the positioning piece abuts against the second rotating shaft step.

[0037] As a preferred embodiment of this utility model, the sealing ring is configured as an oil seal.

[0038] As a preferred embodiment of this utility model, the sealing ring is configured as a skeleton oil seal.

[0039] The main technical effect of this invention for improving the sealing stability of a stage light is as follows: In the traditional rotating structure of a stage light, the support of the bushing relies solely on the internal bearing between it and the central shaft. When the bushing extends significantly and bears a large radial load, its structure resembles a cantilever beam, which is prone to slight deflection under external forces. This deflection directly leads to uneven stress on the sealing ring fitted around its outer periphery; one side of the sealing ring is excessively compressed, while the other side may have a gap, resulting in unilateral wear, permanent deformation, and even seal failure during long-term operation. This invention fundamentally changes the stress model of the bushing by adding a support bearing to the outer periphery of the bushing and fixing its outer ring to the chassis, arm, or lamp head. This support bearing is equivalent to adding a stable far-end support point to the original cantilever structure, transforming the "cantilever support" into a more stable "two-end support" or "large-span support" structure. This support bearing mainly bears and offsets the radial load and overturning moment generated by the equipment's own weight and dynamic operating forces, ensuring that the bushing maintains a high degree of coaxiality and positional stability during rotation. Because the bushing's posture is stabilized, the sealing ring on its outer circumference can maintain a uniform and constant contact pressure throughout the entire circumference. Its sealing performance will not be affected by changes in external load, thus effectively avoiding the risk of local failure, ensuring the stage light's long-term waterproof and dustproof performance, and improving the overall reliability of the machine. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a structural diagram of the stage lamp of this utility model;

[0042] Figure 2 This is an exploded view of the pivotal structure of the chassis and the arm in this utility model.

[0043] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0044] Figure 4 This is an internal perspective view of the pivotal structure between the chassis and the arm in this utility model;

[0045] Figure 5 yes Figure 4 A magnified view of a portion of the image.

[0046] Figure label:

[0047] 1. Lamp head, 2. Arm, 3. Chassis, 4. Central shaft, 5. Bushing, 6. Sealing ring, 7. Support bearing, 8. Mounting bracket, 9. Mounting ring, 10. Bearing pressure plate, 11. Bushing step, 12. Bearing end cover, 13. Inner bearing, 14. Gasket, 15. First rotating shaft step, 16. Upper pressure plate, 17. Driven wheel, 18. Base plate, 19. Side cover plate, 20. Fixed base, 21. Horizontal bracket, 22. Second rotating shaft step, 23. Receiving groove, 24. Positioning piece, 25. Gasket. Detailed Implementation

[0048] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as limiting this utility model.

[0049] like Figures 1 to 5As shown in the illustration, this embodiment of a stage light with improved sealing stability includes a light-emitting head 1, an arm 2 for pivotally connecting and supporting the light head 1, and a housing 3 for supporting the arm 2. The housing 3 is equipped with a fixed mounting bracket 8, which can be a truss structure made of metal material, possessing high rigidity and strength. To achieve multi-dimensional beam projection, the light head 1 and arm 2, as well as the arm 2 and housing 3, are pivotally connected via rotating components. The arm 2 is pivotally connected to the housing 3 via the rotating components, thereby enabling relative rotation. This embodiment focuses on the rotating components used to connect the arm 2 and housing 3, enabling horizontal rotation; the same structure applies to the connection between the light head 1 and arm 2.

[0050] Specifically, the rotating assembly includes a central shaft 4 and a bushing 5 coaxially fitted around the outer periphery of the central shaft 4. In this embodiment, the central shaft 4 serves as a fixed component, connected to the housing 3; while the bushing 5 serves as a rotating component, connected to the arm 2, and rotates around the central shaft 4 via internal bearings. To prevent external moisture, dust, etc., from entering the equipment, a sealing ring 6 is provided on the outer periphery of the bushing 5. This sealing ring 6 forms a reliable seal between the relatively rotatable bushing 5 and the fixed housing 3. The sealing ring 6 is an oil seal, more specifically a skeleton oil seal. This skeleton oil seal has an elastic lip that forms a dynamic seal with the outer periphery of the bushing 5, and a metal outer ring that fits with its outer diameter to form a static seal with the inner wall of the mounting ring 9.

[0051] The key technical solution of this embodiment lies in the addition of a support bearing 7 to the rotating assembly. To facilitate the installation and fixation of the support bearing 7, its outer ring is fixed to the housing 3 via a mounting bracket 8, achieving effective load transfer. This support bearing 7 is also fitted around the outer circumference of the bushing 5, with its inner ring tightly fitted to the outer circumferential surface of the bushing 5, while its outer ring is directly or indirectly fixed to the housing 3 via a certain structure. By adding this support bearing 7, a robust radial support point is provided for the originally relatively cantilevered bushing 5. When the stage light is side-mounted, the weight of the lamp head 1 and arm 2 generates an overturning moment acting on the bushing 5; when the stage light rotates at high speed, centrifugal force also causes the bushing 5 to sway radially. The presence of the support bearing 7 effectively bears and counteracts these radial loads and overturning moments, directly transferring these forces to the more stable structure of the housing 3. This ensures that the bushing 5 maintains a stable posture and high coaxiality during both static and dynamic processes, avoiding tilting or vibration. Since the sealing ring 6 is also fitted on the bushing 5, the stability of the bushing 5 directly ensures that the lip of the sealing ring 6 is subjected to uniform force on the entire circumference, thereby avoiding excessive wear or deformation on one side due to uneven force, thus preventing seal failure and helping to improve the reliability and service life of the stage light in harsh environments.

[0052] To further optimize the mounting structure and ensure accuracy, the rotating assembly also includes a mounting ring 9. This mounting ring 9 is pre-fixed to the mounting bracket 8, and its inner wall is precision-machined to form a standard mounting reference surface. The outer rings of the support bearing 7 and the sealing ring 6 are both fitted and fixed to the inner wall of this mounting ring 9. The advantage of this design is that it integrates the mounting seats for the high-precision bearings and sealing rings into a single, easily machined mounting ring 9, thereby simplifying the machining of complex main components (such as the mounting bracket 8). More importantly, it ensures extremely high coaxiality between the support bearing 7 and the sealing ring 6 after installation, which is a crucial prerequisite for effective support and reliable sealing.

[0053] To reliably position the support bearing 7 axially, the mounting ring 9 is machined with a receiving groove 23 for accommodating the support bearing 7. The inner diameter of the receiving groove 23 is adapted to the outer diameter of the outer ring of the support bearing 7, so the inner sidewall of the receiving groove 23 abuts against the outer ring of the support bearing 7, allowing the outer ring of the support bearing 7 to be stably placed in the groove. Simultaneously, the rotating assembly also includes a bearing pressure plate 10, which is fixed to the end face of the mounting ring 9 by bolts or other fasteners. The bearing pressure plate 10 applies pressure to the end face of the outer ring of the support bearing 7 at the location of the receiving groove 23, firmly pressing it into the mounting groove to prevent axial movement.

[0054] Accordingly, to secure the inner ring of the support bearing 7, the outer circumference of the bushing 5 is integrally formed with a bushing step 11 for abutting one end face of the inner ring of the support bearing 7. Simultaneously, the rotating assembly also provides a bearing end cap 12, which is fitted onto the end of the bushing 5. The outer ring end face of the bearing end cap 12 and the stepped surface of the bushing step 11 together abut and clamp the inner ring of the support bearing 7 from two opposing sides, achieving precise positioning and fixation of the inner ring of the support bearing 7 on the bushing 5.

[0055] To ensure smooth rotation of the bushing 5 around the central shaft 4, at least two inner bearings 13 are provided between them, spaced axially. A spacer 14 is fitted between two adjacent inner bearings 13, fitting around the outer circumference of the central shaft 4. Its two end faces abut against the inner rings of the two adjacent inner bearings 13, providing both isolation and support. The aforementioned bearing end cap 12 not only secures the bearing 7 but also fixes the inner bearings 13. Specifically, the inner side of the middle cover plate of the bearing end cap 12 abuts against the outer ring of the upper inner bearing 13 at the end of the bushing 5, thus also providing axial positioning for the inner bearing 13.

[0056] To stably fix the inner bearing 13 and the bushing 14 assembly onto the central shaft 4, the outer circumference of the central shaft 4 is integrally formed with a first pivot step 15 for supporting the inner ring of the lowermost inner bearing 13. At a position away from the first pivot step 15, an upper pressure plate 16 is coaxially fitted onto the central shaft 4. By tightening the upper pressure plate 16, all the inner bearings 13 and bushings 14 can be securely clamped between the upper pressure plate 16 and the first pivot step 15, forming a stable internal rotational support structure.

[0057] Furthermore, the rotation of arm 2 is driven by a drive assembly, which drives bushing 5 to rotate around central shaft 4. The drive assembly includes a driven pulley 17 fixedly connected to central shaft 4, a transmission belt, and a motor fixed relative to bushing 5. The driven pulley 17 is typically a synchronous pulley, which is connected to the output shaft of the motor located inside arm 2 via a transmission belt, thereby achieving precise drive of bushing 5, and thus driving the entire arm 2 to rotate relative to housing 3.

[0058] In terms of overall layout, the chassis 3 can be composed of a base plate 18 and at least two side cover plates 19 that are spliced ​​together on it. The aforementioned mounting bracket 8 is connected to the end of each side cover plate 19 away from the base plate 18. One end of the central shaft 4 is firmly mounted on the base plate 18 by a fixed base 20, which can be integrally formed with the central shaft 4 or be a separate connection structure. The other end of the central shaft 4 faces the arm 2 and passes through the mounting bracket 8, which has a pivot hole for the rotating component to pass through. A horizontal bracket 21 is fixedly installed on the arm 2. One end of the bushing 5 is fixedly connected to the horizontal bracket 21, and the other end extends into the chassis 3, pivotally connected to the central shaft 4 through the aforementioned internal and external bearing system.

[0059] In addition, to limit the rotation angle of arm 2, a second rotating shaft step 22 is integrally formed on the outer periphery of the central shaft 4. A positioning piece 24 is fixedly sleeved between the outer side of the middle cover plate of the bearing end cover 12 and the second rotating shaft step 22. The outer periphery of the positioning piece 24 is provided with a radial flange, which can cooperate with a stop (not shown in the figure) provided on the bearing end cover 12 or other components that rotate with the bushing 5, thereby limiting the rotation angle of the bushing 5 within a preset range and preventing damage to the internal cables due to excessive rotation. On both sides of the positioning piece 24, that is, between it and the outer side of the middle cover plate of the bearing end cover 12, and between it and the second rotating shaft step 22, gaskets 25 can be held to adjust the clearance and reduce friction.

[0060] In summary, this embodiment innovatively adds a large-diameter external support bearing 7 to the traditional rotating assembly and designs a matching mounting and fixing structure, effectively separating the load-bearing function and sealing function of the rotating assembly. The support bearing 7 bears most of the radial load and overturning moment, ensuring the rotational stability of the bushing 5, thereby creating an ideal working environment for the sealing ring 6, ensuring uniform stress, effectively improving the reliability and durability of the seal, solving the sealing failure problem of large waterproof stage lights under complex working conditions, and ensuring the long-term stable operation of the equipment.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A stage light with improved sealing stability, comprising a lamp head (1) for emitting light, an arm (2) pivotally connected to the lamp head (1), and a housing (3) supporting the arm (2), wherein the arm (2) and the housing (3) are pivotally connected to each other via a rotating assembly; characterized in that, The rotating component includes: Central axis (4); A bushing (5) is rotatably and coaxially connected to a central shaft (4). The bushing (5) can be selectively fixed to the chassis (3) or the arm (2), and the central shaft (4) is correspondingly connected to another component. A sealing ring (6) is fitted around the outer periphery of the bushing (5) to seal the rotating assembly with the housing (3) and / or the arm (2); A support bearing (7) is fitted onto the outer circumference of the bushing (5). The outer ring of the support bearing (7) is fixed relative to the housing (3) or the arm (2), so that the support bearing (7) provides radial support to the bushing (5).

2. The stage light with improved sealing stability according to claim 1, characterized in that, The rotating assembly also includes: Install the collar (9) and fix it to the chassis (3) or the arm (2); The outer ring of the support bearing (7) and the outer ring of the sealing ring (6) both abut against the inner wall of the mounting ring (9).

3. The stage light with improved sealing stability according to claim 2, characterized in that, The rotating assembly also includes a bearing pressure plate (10); The mounting ring (9) is provided with a receiving groove (23) for accommodating the support bearing (7), and its inner sidewall abuts against the outer ring of the support bearing (7); The bearing pressure plate (10) is fixedly abutted against the end face of the mounting ring (9) and presses the outer ring of the support bearing (7) tightly at the position of the receiving groove (23).

4. The stage light with improved sealing stability according to claim 2, characterized in that, The mounting ring (9) is also provided with a mounting groove for mounting at least part of the sealing ring (6), and the outer ring of the sealing ring (6) abuts against the inner sidewall of the mounting groove.

5. The stage light with improved sealing stability according to claim 1, characterized in that, The sealing ring (6) is an oil seal.

6. The stage light with improved sealing stability according to claim 1, characterized in that, The outer periphery of the bushing (5) is provided with a bushing step (11) for abutting against the inner ring of the support bearing (7); The rotating assembly also includes a bearing end cap (12); The bearing end cap (12) is sleeved on the end of the bushing (5), and the bearing end cap (12) and the step surface of the bushing step (11) are clamped together on the inner ring of the support bearing (7) from opposite sides.

7. The stage light with improved sealing stability according to claim 1, characterized in that, The rotating assembly also includes at least two inner bearings (13); each of the inner bearings (13) is axially spaced and sleeved between the bushing (5) and the central shaft (4).

8. The stage light with improved sealing stability according to claim 1, characterized in that, It also includes a drive assembly for driving the bushing (5) to rotate around the central shaft (4). The drive assembly includes a driven wheel (17) fixedly connected to the central shaft (4), a transmission belt, and a motor fixed relative to the bushing (5). The driven wheel (17) is connected to the motor via the transmission belt.

9. The stage light with improved sealing stability according to claim 1, characterized in that, The chassis (3) includes a base plate (18) and at least two side cover plates (19) disposed on the base plate (18) and connected to each other; One end of the central shaft (4) is fixed to the base plate (18), and the other end extends out of the chassis (3) in the direction of the arm (2); The bushing (5) is fixedly connected to the horizontal support (21) of the arm (2).

10. The stage light with improved sealing stability according to claim 9, characterized in that, The support bearing (7) is fixedly connected to the chassis (3) via a mounting bracket (8); The mounting bracket (8) is connected to the end of each of the side cover plates (19) away from the base plate (18).

11. The stage light with improved sealing stability according to claim 9, characterized in that, One end of the bushing (5) is connected to the horizontal bracket (21), and the other end extends into the interior of the housing (3) and is pivotally connected to the central shaft (4). The sealing ring (6) and the support bearing (7) are both located inside the housing.

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