Base rotating mechanism for moving head lamp and stage lamp

Abstract

The base rotating mechanism comprises a base and a U-shaped frame arranged on the base, the rotating mechanism is arranged between the U-shaped frame and the base, a belt is wound on the rotating mechanism in the horizontal direction, and the other end of the belt is connected with a rotating motor. The rotating mechanism comprises a rotating main shaft, a bearing assembly is arranged on the outer side of the rotating main shaft in a sleeving mode, an annular oil seal is arranged between the bearing assembly and the rotating main shaft in a sleeving mode, an annular gasket is further arranged between the oil seal and the side wall of the rotating main shaft, and the annular gasket is in interference fit and is connected to the outer side of the rotating main shaft in a sleeving mode; an annular dustproof lip and an annular sealing lip are arranged on the surface, facing the U-shaped frame, of the oil seal, the dustproof lip is located on the outer side of the sealing lip, the dustproof lip and the sealing lip abut against the bearing assembly in the longitudinal direction, a groove is formed between the dustproof lip and the sealing lip, and a slope structure is formed between the bottom of the groove and the dustproof lip and between the bottom of the groove and the sealing lip.

Description

Technical Field

[0001] The utility model belongs to the field of moving head lights, and in particular relates to a base rotating mechanism for a moving head light and a stage light. Background Art

[0002] Moving head lights, high-tech products integrating electronics, mechanics, and optics, are widely used in venues such as stages and public squares. They offer a wide range of functions, including dimming, focusing, zooming, pattern combinations, rotation, prismatic effects, light color, three-primary color combinations, and soft light effects. They can project an infinite variety of patterns, creating a rich and diverse artistic effect. Due to their powerful functionality and diverse control methods, moving head lights are widely used in various venues, including stage performances, concerts, music concerts, and theaters. In these settings, they can create a variety of unique lighting effects, providing audiences with a more stunning visual experience.

[0003] Existing moving head lights are generally designed as stage lighting equipment capable of varying the projection angle horizontally and vertically. They primarily consist of a base module, a U-shaped frame module, and a lamp head module. The U-shaped frame module primarily enables the lamp head to rotate freely up and down, left and right, and forward and backward, producing a variety of dynamic lighting effects. With the continuous development of the cultural and tourism industries and urban landscape lighting, modern stage lighting fixtures are widely used outdoors and in rainy environments. Therefore, these lamps must be waterproofed in their housings or structures to meet all-round waterproofing requirements. Specifically, an oil seal is installed on the central axis of the rotating section where the U-shaped frame connects to the base and lamp head to ensure a waterproof seal in rainy environments. This oil seal is primarily made of nitrile rubber, which offers excellent sealing and wear resistance. However, because the central axis of the projection rotating section must pass through the lamp head's power and signal connection cables, an aluminum shaft is typically used for the central control structure. Over time, the contact area between the central axis and the oil seal can easily wear, causing unusual noises, poor sealing, or reduced strength. Summary of the Invention

[0004] In response to the problems in the related art, the utility model proposes a base rotating mechanism and a stage light for a moving head light, in which a stainless steel annular gasket is arranged between the rotating main shaft and the oil seal. The annular gasket has an interference fit with the rotating main shaft to prevent the rotating main shaft from contacting the oil seal and causing wear, abnormal noise or poor sealing.

[0005] The utility model is achieved in this way:

[0006] A base rotating mechanism for a moving head light comprises a base and a U-shaped frame arranged on the base, a rotating mechanism being arranged between the U-shaped frame and the base, a belt being wound around the rotating mechanism in a horizontal direction, the other end of the belt being connected to a rotating motor, and the rotating mechanism being driven to rotate by the rotating motor;

[0007] The rotating mechanism includes a rotating main shaft, a bearing assembly is sleeved on the outer side of the rotating main shaft, an annular oil seal is sleeved between the bearing assembly and the rotating main shaft, and a stainless steel annular gasket is further provided between the oil seal and the side wall of the rotating main shaft, the annular gasket is interference fit and sleeved on the outer side of the rotating main shaft;

[0008] The oil seal is provided with an annular dust lip and a sealing lip on the side facing the U-shaped frame. The dust lip is located on the outside of the sealing lip. The dust lip and the sealing lip abut against the bearing assembly in the longitudinal direction. A groove is provided between the dust lip and the sealing lip. The bottom of the groove and the dust lip and the sealing lip form an inclined structure. The dust lip and the sealing lip are provided with a protective layer.

[0009] The annular gasket is made of stainless steel and is tightly fitted to the rotating main shaft through an interference fit. The annular gasket is sealed with the oil seal to ensure that the side of the annular gasket connecting the oil seal is smooth, sealed and waterproof.

[0010] The two side surfaces of the oil seal are respectively connected to the annular gasket and the bearing assembly.

[0011] Preferably, the bearing assembly includes a bearing seat, which is connected to the U-shaped frame; an upper and a lower bearing are provided in the bearing seat, and the bearings are double-row ball bearings.

[0012] Specifically, conventional bearings are used, while double-row ball bearings can improve the clearance between the bearing balls and their inner rings, main shafts, etc., thereby avoiding the problem of shaking of the U-shaped frame body and preventing the lamp body from shaking due to stopping after horizontally rotating its projection direction, making the projection of the lamp more accurate; at the same time, the base and the rotating mechanism have a stronger carrying capacity and a smaller friction coefficient, which enables the projection direction of the lamp to be faster, smoother and more accurate, and can effectively improve the lighting effect of the lamp projection. The friction coefficient between the base and the rotating mechanism becomes smaller, making the rotating part smoother, which can effectively increase the service life of the lamp.

[0013] Preferably, the protective layer is a polytetrafluoroethylene layer.

[0014] The oil seal is made of nitrile rubber, and the dust lip and the sealing lip are provided with polytetrafluoroethylene and are integrally formed with the nitrile rubber.

[0015] Preferably, an outer ring washer and an inner ring washer are provided between the upper and lower bearings; the inner ring washer is sleeved on the outside of the rotating main shaft and connected to the rotating main shaft; the outer ring washer is sleeved on the outside of the inner ring washer and connected to the bearing seat.

[0016] Specifically, the outer ring washer and the inner ring washer are arranged side by side in the outer layer and the inner layer, and the outer ring washer and the inner ring washer are not in contact with each other; the outer ring washer and the inner ring washer are respectively abutted between the upper and lower bearings.

[0017] Preferably, the edge of the rotating main shaft close to the side where the base is located protrudes outward to form an annular boss, and the annular gasket is connected to the annular boss.

[0018] Specifically, the annular boss is connected to the base, that is, the annular boss is seated on the base, and the lower end of the annular gasket abuts against the annular boss.

[0019] Preferably, a coil spring is provided in the oil seal, and the position of the coil spring corresponds to that of the sealing lip.

[0020] Specifically, the oil seal can prevent rainwater from entering the lamp while the linkage bearing assembly rotates; the spiral spring ring is located on the inner ring, at a position corresponding to the sealing lip.

[0021] A metal frame is also provided inside the oil seal to make the overall structure of the oil seal stable.

[0022] Preferably, a retaining spring washer is sleeved on the outer side of the rotating main shaft, and one end of the retaining spring washer faces the base and abuts against the bearing assembly.

[0023] Specifically, the retaining spring washer mainly limits the bearing assembly from the top to ensure that the bearing assembly is sleeved on the rotating main shaft.

[0024] Preferably, an elastic retaining ring is sleeved on the outer side of the rotating main shaft, and the retaining spring washer faces one end of the U-shaped frame and abuts against the elastic retaining ring.

[0025] Specifically, the elastic retaining ring is clamped on the rotating main shaft and connected to the retaining spring washer to fix the retaining spring washer; at the same time, it can also prevent the elastic retaining ring, bearing assembly, U-shaped frame and other lamp body structures from loosening and falling when the lamp is hung upside down, preventing safety hazards.

[0026] Preferably, a large pulley is provided at one end of the rotating main shaft close to the U-shaped frame, and a belt is wound around the large pulley.

[0027] Specifically, the other end of the belt is wound around the rotating motor, thereby driving the rotating mechanism to rotate through the rotating motor.

[0028] Preferably, the rotating main shaft is connected to the base, and an anti-slip flange is provided at one end of the rotating main shaft close to the base.

[0029] Specifically, the anti-slip flange is connected to the inner side of the rotating main shaft through threads; the base is located between the anti-slip flange and the annular boss of the rotating main shaft. The anti-slip flange can prevent the screws of the rotating main shaft from loosening, which may cause the lamp body to loosen and fall off when the lamp is hung upside down.

[0030] A stage light employs the base rotating mechanism for a moving head light as described above.

[0031] Compared with the prior art, the present invention achieves the following beneficial effects:

[0032] The utility model provides a base rotating mechanism for a moving head light and a stage light, wherein a bearing assembly and an oil seal are sleeved on the outer side of a rotating main shaft, a stainless steel annular gasket is provided between the oil seal and the side wall of the rotating main shaft, and an interference fit is achieved between the annular gasket and the rotating main shaft, while ensuring that the mating surfaces of the annular gasket and the oil seal are smooth and sealed and waterproof, thereby avoiding problems such as easy wear caused by direct contact between the rotating main shaft and the oil seal, abnormal noise, poor sealing, or poor strength of the rotating main shaft.

[0033] The oil seal is equipped with an annular dust lip and a sealing lip, and there is an inclined surface structure between the dust lip and the sealing lip. Since the oil seal is made of nitrile rubber, a protective layer is added between the dust lip and the sealing lip, and the inclined surface structure is combined to enhance the elasticity, sealing, wear resistance, high and low temperature resistance, and corrosion resistance of the oil seal lip. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a product schematic diagram of a base rotation mechanism for a moving head light in an embodiment of the utility model;

[0035] Figure 2 This is a schematic diagram of the connection structure of a base rotating mechanism for a moving head light in an embodiment of the utility model;

[0036] Figure 3 This is a structural diagram of a base rotating mechanism for a moving head light in an embodiment of the present utility model;

[0037] Figure 4 This is an exploded schematic diagram of a base rotating mechanism for a moving head light in an embodiment of the present utility model;

[0038] Figure 5 This is a cross-sectional schematic diagram of a base rotating mechanism for a moving head light in an embodiment of the present utility model;

[0039] Figure 6 This is a schematic cross-sectional view of an oil seal of a base rotating mechanism for a moving head light in an embodiment of the present utility model;

[0040] Figure 7 This is a schematic diagram of the position of an annular washer of a base rotating mechanism for a moving head light in an embodiment of the present utility model.

[0041] Reference numerals:

[0042] 1. Base; 2. U-shaped frame; 3. Belt; 4. Rotating motor;

[0043] 5. Rotating mechanism; 51. Rotating main shaft; 511. Annular boss; 52. Bearing assembly; 521. Bearing seat; 522. Double-row ball bearing; 53. Oil seal; 531. Dust lip; 532. Sealing lip; 533. Groove; 534. Helical spring ring; 535. Metal frame; 54. Annular gasket; 55. Inner ring gasket; 551. Outer ring gasket; 56. Circlip gasket; 57. Circlip; 58. Large pulley; 59. Anti-slip flange. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] Example

[0046] like Figures 1 to 7 A base 1 rotating mechanism 5 for a moving head light includes a base 1 and a U-shaped frame 2 arranged on the base 1. A rotating mechanism 5 is provided between the U-shaped frame 2 and the base 1. A belt 3 is wound around the rotating mechanism 5 in the horizontal direction. The other end of the belt 3 is connected to a rotating motor 4. The rotating motor 4 drives the rotating mechanism 5 to rotate.

[0047] The rotating mechanism 5 includes a rotating main shaft 51, a bearing assembly 52 is sleeved on the outer side of the rotating main shaft 51, an annular oil seal 53 is sleeved between the bearing assembly 52 and the rotating main shaft 51, and a stainless steel annular gasket 54 is further provided between the oil seal 53 and the side wall of the rotating main shaft 51. The annular gasket 54 is interference fit and sleeved on the outer side of the rotating main shaft 51;

[0048] The oil seal 53 is provided with an annular dust lip 531 and a sealing lip 532 on the side facing the U-shaped frame 2. The dust lip 531 is located on the outside of the sealing lip 532. The dust lip 531 and the sealing lip 532 abut against the bearing assembly 52 from the longitudinal direction. A groove 533 is provided between the dust lip 531 and the sealing lip 532. The bottom of the groove 533 and the dust lip 531 and the sealing lip 532 form an inclined structure. The dust lip 531 and the sealing lip 532 are provided with a protective layer.

[0049] The annular gasket 54 is made of stainless steel and is tightly fitted to the rotating main shaft 51 through an interference fit. The annular gasket 54 is sealed with the oil seal 53 to ensure that the surface where the annular gasket 54 meets the oil seal 53 is smooth, sealed and waterproof.

[0050] The protective layer is a polytetrafluoroethylene layer.

[0051] The oil seal 53 is made of nitrile rubber, and the dust lip 531 and the sealing lip 532 are provided with polytetrafluoroethylene and are integrally formed with the nitrile rubber.

[0052] The two side surfaces of the oil seal 53 are connected to the annular gasket 54 and the bearing assembly 52 respectively.

[0053] The edge of the rotating main shaft 51 close to the base 1 is protruded outward to form an annular boss 511 , and the annular gasket 54 is connected to the annular boss 511 .

[0054] The annular boss 511 is connected to the base 1 , that is, the annular boss 511 is seated on the base 1 , and the lower end of the annular gasket 54 abuts against the annular boss 511 .

[0055] A coil spring 534 is provided in the oil seal 53 , and the position of the coil spring 534 corresponds to the position of the sealing lip 532 .

[0056] The oil seal 53 can prevent rainwater from entering the lamp when the linkage bearing assembly 52 rotates; the spiral spring ring 534 is located on the inner ring, at a position corresponding to the sealing lip 532.

[0057] A metal frame 535 is further provided in the oil seal 53 to stabilize the overall structure of the oil seal 53 .

[0058] The bearing assembly 52 includes a bearing seat 521 , which is connected to the U-shaped frame 2 ; an upper bearing and a lower bearing are provided in the bearing seat 521 , and the bearings are double-row ball bearings 522 .

[0059] Currently, when a moving head light stops at the end of a projection change, there is light beam or spot jitter due to bearing clearance or assembly errors in the rotating parts. Or the lamp is preset and programmed to project a fixed point at a certain position, but the fixed point is inaccurate when the preset program is called again. These all affect the performance effect. At the same time, the rotating parts of the lamp are relatively worn out. In severe cases, it will cause abnormal noise in the rotating parts, affecting the overall service life of the lamp.

[0060] In the traditional way, two ordinary bearings are used for the bearings of the rotating part, while the present embodiment uses two double-row ball bearings 522, which can improve the matching clearance between the balls of the bearings and their inner rings, main shafts, etc., avoid the problem of shaking of the U-shaped frame 2 body, and prevent the lamp body from shaking due to stopping after horizontally rotating its projection direction, so that the projection of the lamp is more accurate; at the same time, the bearing capacity of the base 1 and the rotating mechanism 5 is also stronger, and the friction coefficient is smaller, so that the projection direction of the lamp is faster, smoother and more accurate, which can effectively improve the lighting effect of the lamp projection. The friction coefficient of the base 1 and the rotating mechanism 5 becomes smaller, making the rotation part smoother, which can effectively improve the service life of the lamp.

[0061] An outer ring washer 551 and an inner ring washer 55 are provided between the upper and lower bearings; the inner ring washer 55 is sleeved on the outside of the rotating main shaft 51 and connected to the rotating main shaft 51; the outer ring washer 551 is sleeved on the outside of the inner ring washer 55 and connected to the bearing seat 521.

[0062] The outer ring washer 551 and the inner ring washer 55 are arranged side by side in the outer layer and the inner layer, and the outer ring washer 551 and the inner ring washer 55 are not in contact with each other; the outer ring washer 551 and the inner ring washer 55 are respectively abutted between the upper and lower bearings.

[0063] A retaining spring washer 56 is sleeved on the outer side of the rotating main shaft 51 . One end of the retaining spring washer 56 faces the base 1 and abuts against the bearing assembly 52 .

[0064] The retaining spring washer 56 mainly limits the bearing assembly 52 from the top to ensure that the bearing assembly 52 is sleeved on the rotating main shaft 51.

[0065] An elastic circlip 57 is sleeved on the outer side of the rotating main shaft 51 , and the retaining spring washer 56 faces one end of the U-shaped frame 2 and abuts against the elastic circlip 57 .

[0066] The elastic retaining ring 57 is clamped on the rotating main shaft 51 and connected to the retaining spring washer 56 to fix the retaining spring washer 56; at the same time, it can also prevent the elastic retaining ring 57, bearing assembly 52, U-shaped frame 2 and other lamp body structures from loosening and falling when the lamp is hung upside down, thereby preventing safety hazards.

[0067] A large pulley 58 is provided at one end of the rotating main shaft 51 close to the U-shaped frame 2 , and a belt 3 is wound around the large pulley 58 .

[0068] The other end of the belt 3 is wound around the rotary motor 4 , thereby driving the rotary mechanism 5 to rotate through the rotary motor 4 .

[0069] The rotating main shaft 51 is connected to the base 1 , and an anti-drop flange 59 is provided at one end of the rotating main shaft 51 close to the base 1 .

[0070] The anti-slip flange 59 is connected to the inner side of the rotating main shaft 51 through threads; the base 1 is located between the anti-slip flange 59 and the annular boss 511 of the rotating main shaft 51. The anti-slip flange 59 can prevent the screws of the rotating main shaft 51 from loosening, which may cause the lamp body to loosen and fall off when the lamp is hung upside down.

[0071] A stage light uses the base 1 rotating mechanism 5 for a moving head light as described above.

[0072] The utility model provides a base 1 rotating mechanism 5 and a stage light for a moving head light, wherein a stainless steel annular gasket 54 is provided between an oil seal 53 and a rotating main shaft 51 to prevent the contact portion between the rotating main shaft 51 and the oil seal 53 from being easily worn, thereby preventing abnormal noise from being generated or causing poor sealing or reduced strength of the rotating main shaft 51.

[0073] A layer of polytetrafluoroethylene is added to the lip of the oil seal 53 to form an integrated structure with the nitrile rubber of the oil seal 53 itself. The inclined structure of the dust lip 531 and the sealing lip 532 can enhance the elasticity, sealing, wear resistance, high and low temperature resistance, and corrosion resistance of the lip of the oil seal 53.

[0074] The bearings use double-row ball bearings 522 to prevent the U-shaped frame 2 main body and the projection position from shaking when they are stopped. This also makes the base 1 and the rotating main shaft 51 have a stronger load-bearing capacity and a smaller friction coefficient, thereby making the rotating parts smoother and the projection position of the lamp faster, more stable and more accurate, thereby improving the lighting effect and service life of the lamp.

[0075] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience only and do not constitute any limitation to the present invention.

Claims

1. A base rotating mechanism for a moving head light, comprising a base and a U-shaped frame mounted on the base, a rotating mechanism disposed between the U-shaped frame and the base, a belt being wound horizontally around the rotating mechanism, the other end of the belt being connected to a rotating motor, and the rotating mechanism being driven to rotate by the rotating motor; characterized in that: The rotating mechanism includes a rotating main shaft, a bearing assembly is sleeved on the outer side of the rotating main shaft, an annular oil seal is sleeved between the bearing assembly and the rotating main shaft, and a stainless steel annular gasket is further provided between the oil seal and the side wall of the rotating main shaft, the annular gasket is interference fit and sleeved on the outer side of the rotating main shaft; The oil seal is provided with an annular dust lip and a sealing lip on the side facing the U-shaped frame. The dust lip is located on the outside of the sealing lip. The dust lip and the sealing lip abut against the bearing assembly in the longitudinal direction. A groove is provided between the dust lip and the sealing lip. The bottom of the groove and the dust lip and the sealing lip form an inclined structure. The dust lip and the sealing lip are provided with a protective layer.

2. The base rotation mechanism for a moving head light according to claim 1, characterized in that: The bearing assembly includes a bearing seat, which is connected to the U-shaped frame; an upper and a lower bearing are arranged in the bearing seat, and the bearings are double-row ball bearings.

3. The base rotation mechanism for a moving head light according to claim 1, characterized in that: The protective layer is a polytetrafluoroethylene layer.

4. The base rotation mechanism for a moving head light according to claim 2, characterized in that: An outer ring washer and an inner ring washer are provided between the upper and lower bearings; the inner ring washer is sleeved on the outside of the rotating main shaft and connected to the rotating main shaft; the outer ring washer is sleeved on the outside of the inner ring washer and connected to the bearing seat.

5. The base rotation mechanism for a moving head light according to claim 1, characterized in that: The edge of the rotating main shaft close to the base is protruded outward to form an annular boss, and the annular gasket is connected to the annular boss.

6. The base rotating mechanism for a moving head light according to claim 1, characterized in that: A coil spring is provided in the oil seal, and the position of the coil spring corresponds to the position of the sealing lip.

7. The base rotating mechanism for a moving head light according to claim 1, characterized in that: A retaining spring washer is sleeved on the outer side of the rotating main shaft, and one end of the retaining spring washer faces the base and abuts against the bearing assembly.

8. The base rotating mechanism for a moving head light according to claim 7, characterized in that: An elastic circlip is sleeved on the outer side of the rotating main shaft, and the retaining spring washer faces one end of the U-shaped frame and abuts against the elastic circlip.

9. The base rotating mechanism for a moving head light according to claim 1, characterized in that: A large pulley is provided at one end of the rotating main shaft close to the U-shaped frame, and a belt is wound around the large pulley; the rotating main shaft is connected to the base, and an anti-slip flange is provided at one end of the rotating main shaft close to the base.

10. A stage light, characterized in that: A base rotating mechanism for a moving head light as claimed in any one of claims 1 to 9 is used.

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