Lamp arm multi-stage driving structure

Abstract

The utility model relates to a multi-stage driving structure of a lamp arm part. The multi-stage driving structure comprises a driving motor fixedly arranged in an arm part bracket, a driving wheel is arranged on an output shaft of the driving motor; the driving wheel is connected with a driven wheel through a first connecting belt; a second driven wheel is coaxially arranged on the driven wheel; the second driven wheel is connected with a third driven wheel through a second connecting belt; the third driven wheel is fixedly connected with the connecting seat; the connecting seat is fixedly connected with the lamp base; and a first bearing is arranged between the arm bracket and the connecting seat. According to the multi-stage driving structure, the requirement for flatness or longitudinal space pulling of the bottom (transverse connecting part) of the arm support in a traditional structure is abandoned. The multi-stage transmission structure is arranged in the arm support, driving can be achieved without depending on the bottom space of the arm support in a specific shape, the design of the arm support can be more flexible, and waste of the inner space caused by structural limitation is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of lighting fixtures, and in particular to a multi-stage drive structure for the arm of a lighting fixture. Background Technology

[0002] In the field of searchlights and stage lighting, rotating lamp heads are commonly used equipment. Their basic structure includes a base, an arm support, and a lamp head. The arm support is typically designed with a U-shape, and the lamp head is mounted between two opposing arms of the arm support via a rotating connection, allowing for flexible rotation of the lamp head. The bottom of the arm support is rotatably connected to the base, enabling the entire arm support to rotate relative to the base, thereby adjusting the lighting angle of the lamp.

[0003] Currently, there are several pressing issues to be addressed in the technical solutions for driving the rotation of the arm bracket. A common approach is to house the drive motor inside the arm bracket to rotate it relative to the base. However, this design requires the bottom of the arm bracket, specifically the lateral connection between the two opposing arms, to remain relatively flat to provide sufficient installation space for the drive motor. In practical applications, this requirement imposes numerous limitations on the structural design of the arm bracket. For example, in scenarios where the overall appearance and compactness of the lighting fixture are critical, maintaining a flat bottom for the arm bracket may result in a less aesthetically pleasing and streamlined shape for the fixture, and may also make it difficult to meet the space constraints of installation.

[0004] Another approach is to increase the longitudinal space of the lateral connection of the boom support to create sufficient space for the drive motor installation. However, this approach also has drawbacks. On the one hand, increasing the longitudinal space will increase the amount of material used in the boom support, raising production costs; on the other hand, this structural change is not conducive to the rational utilization of the internal space of the boom support. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides a multi-stage drive structure for the arm of a lamp.

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] A multi-stage drive structure for a lamp arm includes a drive motor fixedly mounted inside an arm support; a drive wheel is mounted on the output shaft of the drive motor; a driven wheel is connected to the drive wheel via a first connecting belt; a second driven wheel is coaxially mounted on the driven wheel; the second driven wheel is connected to a third driven wheel via a second connecting belt; the third driven wheel is fixedly connected to a connecting seat; the connecting seat is fixedly connected to a lamp base; and a first bearing is provided between the arm support and the connecting seat.

[0008] Furthermore, the driven wheel is connected to a central shaft at its center; the bottom of the central shaft is fixedly connected to a support frame inside the arm bracket; and the top of the central shaft is fixedly connected to the support frame via a support plate.

[0009] Furthermore, a waterproof control box is rotatably connected to the top of the third driven wheel; a second bearing and an oil seal are fitted into the waterproof control box and the inner side of the third driven wheel; the waterproof control box is connected to the interior of the connecting seat.

[0010] Furthermore, a limiting plate is fixedly provided on the top of the third driven wheel; the limiting plate is provided with a plurality of limiting grooves; and a push-pull rod that cooperates with the limiting grooves is fixedly connected to the arm bracket to limit the rotation position of the arm bracket.

[0011] Furthermore, the push-pull rod is disposed within the guide block; the guide block is fixedly connected to the support frame within the arm bracket; a limit block is fixedly connected to the push-pull rod; the guide block is provided with a guide groove that cooperates with the limit block; and a push-pull handle extending out of the arm bracket is connected to the end of the push-pull rod away from the limit plate.

[0012] Furthermore, a bearing seat is provided outside the connecting seat; the bearing seat is fixedly connected to the bottom of the arm bracket; a first bearing is provided between the bearing seat and the connecting seat.

[0013] Furthermore, two first bearings are provided, located at the upper and lower ends of the bearing housing, respectively.

[0014] Furthermore, both the connecting seat and the bearing seat have through holes in the middle.

[0015] The beneficial effects of this invention are as follows: This multi-stage drive structure eliminates the requirements of traditional structures regarding the flatness of the bottom (lateral connection part) of the arm bracket or the height of the longitudinal space. By setting a multi-stage transmission structure inside the arm bracket, drive can be achieved without relying on the space at the bottom of the arm bracket with a specific shape, making the design of the arm bracket more flexible and effectively avoiding the waste of internal space caused by structural limitations. The multi-stage drive structure can achieve the same or even better driving effect in a smaller space. The various transmission components cooperate with each other and are compactly arranged inside the arm bracket, making the overall structure of the lamp more compact. At the same time, the multi-stage transmission can also achieve a deceleration effect, and the deceleration ratio can be designed according to needs, thereby more precisely adjusting the rotation angle of the third driven wheel. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural view of the present invention;

[0018] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0019] Figure 3 This is an enlarged view of part A of this utility model;

[0020] Figure 4 This is an enlarged view of part B of this utility model;

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Arm support; 101. Support frame; 102. Support plate; 103. Bearing seat; 110. Drive motor; 111. Drive wheel; 112. First connecting belt; 113. Driven wheel; 114. Central shaft; 115. Second driven wheel; 116. Second connecting belt; 117. Third driven wheel; 120. Connecting seat; 130. First bearing; 140. Waterproof control box; 141. Second bearing; 142. Oil seal; 150. Limiting plate; 151. Limiting groove; 160. Push-pull rod; 161. Guide block; 162. Limiting block; 163. Guide groove; 164. Push-pull handle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] For an example, please refer to... Figure 1-4 As shown:

[0027] A multi-stage drive structure for a lamp arm includes a drive motor 110 fixedly mounted inside an arm support 100; a drive wheel 111 is mounted on the output shaft of the drive motor 110; a driven wheel 113 is connected to the drive wheel 111 via a first connecting belt 112; a second driven wheel 115 is coaxially mounted on the driven wheel 113; the second driven wheel 115 is connected to a third driven wheel 117 via a second connecting belt 116; the third driven wheel 117 is fixedly connected to a connecting seat 120; the connecting seat 120 is fixedly connected to a lamp base; and a first bearing 130 is provided between the arm support 100 and the connecting seat 120.

[0028] This multi-stage drive structure eliminates the requirements of traditional structures regarding the flatness of the bottom (lateral connection part) of the arm bracket 100 or the vertical space increase. By setting a multi-stage transmission structure inside the arm bracket 100, drive can be achieved without relying on the space at the bottom of the arm bracket 100 with a specific shape, making the design of the arm bracket 100 more flexible and effectively avoiding the waste of internal space caused by structural limitations. The multi-stage drive structure can achieve the same or even better drive effect in a smaller space. The various transmission components cooperate with each other and are compactly arranged inside the arm bracket 100, making the overall structure of the lamp more compact. At the same time, the multi-stage transmission can also achieve a deceleration effect, and the reduction ratio can be designed according to needs, thereby more precisely adjusting the rotation angle of the third driven wheel 117.

[0029] In one embodiment, the drive wheel 111, driven wheel 113, second driven wheel 115, and third driven wheel 117 can be configured as synchronous belt pulleys, and the first connecting belt 112 and second connecting belt 116 can be configured as synchronous belts, thereby improving the accuracy of transmission.

[0030] In one embodiment, the driven wheel 113 is centrally connected to a central shaft 114; the bottom of the central shaft 114 is fixedly connected to a support frame 101 within the arm bracket 100; the top of the central shaft 114 is fixedly connected to the support frame 101 via a support plate 102. This double-fixing method effectively limits the displacement and swaying of the driven wheel 113 during operation; the fixed structures at both the bottom and top of the central shaft 114 ensure that the force experienced by the driven wheel 113 during operation is well distributed to the support frame 101 via the central shaft 114. Because the driven wheel 113 is in a stable position, its relative positional accuracy with the drive wheel 111 and the second driven wheel 115 can be guaranteed during multi-stage transmission; in one embodiment, the support plate 102 can be fixedly connected to the support frame 101 via a support column.

[0031] like Figure 1 , Figure 3As shown, in one embodiment, a waterproof control box 140 is rotatably connected to the top of the third driven wheel 117; a second bearing 141 and an oil seal 142 are fitted into the inner side of the waterproof control box 140 and the third driven wheel 117; the waterproof control box 140 is connected to the interior of the connecting seat 120. By placing the waterproof control box 140 on the top of the third driven wheel 117 and using the second bearing 141 and oil seal 142 to cooperate with the inner side of the third driven wheel 117, the waterproof function is concentrated in this key part, the waterproof control box 140. Since the waterproof control box 140 can ensure the waterproofness of itself and the connecting seat 120, the waterproof structure design inside the arm support 100 can be reduced. This means that there is no need to reserve a lot of space or adopt a complex waterproof structure inside the arm support 100, making the space utilization inside the arm support 100 more efficient, and also reducing the cost increase and maintenance difficulty caused by too many waterproof structures. The waterproof control box 140 is internally connected to the connector 120, enabling internal wiring. This internal wiring provides a waterproof channel for the lighting fixture's wiring. Internal wiring prevents messy exposed wires on the outside of the lighting fixture, reducing the impact of external factors (such as water, dust, and impacts) that could affect the fixture. It also makes the overall appearance of the lighting fixture cleaner and more aesthetically pleasing, meeting the design requirements of stage lighting and other similar equipment. In one embodiment, both the connector 120 and the bearing seat 103 have through holes in the middle, meaning that the connector 120 can connect internally to the lighting fixture base, thus enabling internal waterproof wiring between the arm bracket 100 and the lighting fixture base.

[0032] like Figure 4 As shown, in one embodiment, a limiting plate 150 is fixedly provided on the top of the third driven wheel 117; the limiting plate 150 is provided with a plurality of limiting grooves 151; a push-pull rod 160 that cooperates with the limiting grooves 151 is fixedly connected to the arm support 100 to limit the rotational position of the arm support 100. The rotational position of the arm support 100 can be precisely limited by the limiting grooves 151 on the limiting plate 150 and the push-pull rod 160 that cooperates with it on the arm support 100.

[0033] In one embodiment, the push-pull rod 160 is disposed within the guide block 161; the guide block 161 is fixedly connected to the support frame 101 within the arm bracket 100; a limit block 162 is fixedly connected to the push-pull rod 160; the guide block 161 is provided with a guide groove 163 that cooperates with the limit block 162; a push-pull handle 164 extending out of the arm bracket 100 is connected to the end of the push-pull rod 160 away from the limit plate 150, which allows the operator to easily operate the push-pull rod 160 without disassembling the lamp housing. During the movement of the push-pull rod 160, the cooperation of the guide block 161 and the guide groove 163 can prevent the push-pull rod 160 from deviating or shaking.

[0034] like Figure 2-3 As shown, in one embodiment, a bearing seat 103 is provided outside the connecting seat 120; the bearing seat 103 is fixedly connected to the bottom of the arm support 100; a first bearing 130 is provided between the bearing seat 103 and the connecting seat 120. The bearing can convert the sliding friction of the arm support 100 rotating relative to the connecting seat 120 into rolling friction. The frictional force of rolling friction is much smaller than that of sliding friction, which greatly reduces the frictional loss between the connecting seat 120 and the arm support 100 during rotation. The connection method between the bearing seat 103 and the connecting seat 120 and the arm support 100 can effectively distribute the force on the arm support 100 during rotation. In one embodiment, two first bearings 130 are provided, located at the upper and lower ends of the bearing seat 103 respectively, which can make the weight of the arm support 100 and the external forces (such as wind force, vibration, etc.) experienced by the lamp during use more evenly distributed on the bearing seat 103. In the actual use of the lamp, the force it experiences may be multi-directional. The arrangement of the upper and lower bearings can better cope with these complex force conditions.

[0035] Working principle: Since the connecting seat 120 is fixedly connected to the lamp base, the lamp base will not move during use. Therefore, the position of the third driven wheel 117 is relatively fixed. When the drive motor 110 is working, the transmission structure transmits the force in the opposite direction to the drive motor 110, which drives the arm bracket 100 to rotate, so as to realize the rotation of the arm bracket 100 relative to the lamp base.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-stage driving structure for a lamp arm, characterized in that: The device includes a drive motor (110) fixedly installed inside the arm support (100); a drive wheel (111) is provided on the output shaft of the drive motor (110); the drive wheel (111) is connected to a driven wheel (113) via a first connecting belt (112); a second driven wheel (115) is coaxially provided on the driven wheel (113); the second driven wheel (115) is connected to a third driven wheel (117) via a second connecting belt (116); the third driven wheel (117) is fixedly connected to a connecting seat (120); the connecting seat (120) is fixedly connected to a lamp base; and a first bearing (130) is provided between the arm support (100) and the connecting seat (120).

2. The multi-stage driving structure for a lamp arm according to claim 1, characterized in that: The driven wheel (113) is connected to a central shaft (114); the bottom of the central shaft (114) is fixedly connected to the support frame (101) inside the arm bracket (100); the top of the central shaft (114) is fixedly connected to the support frame (101) through a support plate (102).

3. The multi-stage drive structure for a lamp arm according to claim 1, characterized in that: A waterproof control box (140) is rotatably connected to the top of the third driven wheel (117); a second bearing (141) and an oil seal (142) are fitted inside the waterproof control box (140) and the third driven wheel (117); the waterproof control box (140) is internally connected to the connecting seat (120).

4. The multi-stage driving structure for a lamp arm according to claim 1, characterized in that: The top of the third driven wheel (117) is fixedly provided with a limiting plate (150); the limiting plate (150) is provided with a plurality of limiting grooves (151); the arm bracket (100) is fixedly connected with a push-pull rod (160) that cooperates with the limiting grooves (151) to limit the rotation position of the arm bracket (100).

5. The multi-stage drive structure for a lamp arm according to claim 4, characterized in that: The push-pull rod (160) is disposed inside the guide block (161); the guide block (161) is fixedly connected to the support frame (101) inside the arm bracket (100); a limit block (162) is fixedly connected to the push-pull rod (160); the guide block (161) is provided with a guide groove (163) that cooperates with the limit block (162); the end of the push-pull rod (160) away from the limit plate (150) is connected to a push-pull handle (164) that extends out of the arm bracket (100).

6. The multi-stage driving structure for a lamp arm according to claim 1, characterized in that: The connecting seat (120) is provided with a bearing seat (103); the bearing seat (103) is fixedly connected to the bottom of the arm support (100); a first bearing (130) is provided between the bearing seat (103) and the connecting seat (120).

7. The multi-stage driving structure for a lamp arm according to claim 6, characterized in that: Two first bearings (130) are provided, located at the upper and lower ends of the bearing housing (103) respectively.

8. The multi-stage driving structure for a lamp arm according to claim 6, characterized in that: Both the connecting seat (120) and the bearing seat (103) have through holes in the middle.

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