Base belt transmission structure

Abstract

The utility model relates to a base belt transmission structure. The base belt transmission structure comprises a transmission belt connected with an arm part, one end of the transmission belt is connected with a synchronous wheel, and the other end is connected with a transmission wheel; the transmission wheel is connected with a motor output shaft; the middle of the transmission belt is connected with an automatic tensioning assembly. The automatic tensioning assembly comprises an adjusting plate; the adjusting plate is connected with the rotating shaft and can rotate around the rotating shaft; the adjusting plate is connected with a tensioning wheel which abuts against the transmission belt in a matched mode. The adjusting plate is connected with a spring through a first fixing part, wherein the spring applies force to the adjusting plate all the time so that the adjusting plate can drive the tensioning wheel to tend to move towards the transmission belt with the rotating shaft as the rotating center, and the tensioning wheel can be tightly attached to the transmission belt. The tensioning wheel can be automatically adjusted through the automatic tensioning assembly, so that the tensioning wheel can abut against the transmission belt all the time, and it is guaranteed that the transmission belt is in a tensioned state all the time; and through automatic adjustment of the tightness of the transmission belt, the bad problem caused by manual adjustment is avoided, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of stage lights, in particular to a base belt drive structure. Background Art

[0002] Stage lights usually include a base assembly and a lamp head assembly. The lamp head assembly is rotatably connected to the base assembly through an arm; and the rotation angle of the lamp head assembly is controlled by a transmission belt mechanism, so as to achieve the purpose of the stage light shaking its head, and the projection position can also be adjusted to the desired position.

[0003] In the prior art, in order to more accurately adjust the rotation angle of the lamp head assembly, a synchronous belt and a belt gear are usually used in cooperation; for example, the structure disclosed in the Chinese utility model patent with the patent publication number CN206398659U does not provide a tension pulley, resulting in the inability to adjust the tightness of the transmission belt (synchronous belt). When the transmission belt is too loose, the motor is prone to losing steps or being uncontrollable when driving the belt. When it is too tight, there is easy to generate noise and abnormal noise, and the belt is also prone to break. And for some driving mechanisms provided with tension pulleys, although the tightness of the transmission belt can be controlled, the position of the tension pulley is fixed, which is not conducive to the adjustment of the tightness of the transmission belt.

[0004] A belt tension adjustment device disclosed in the Chinese utility model patent with the patent publication number CN221503899U can ensure the adjustment direction of the belt adjustment block through the cooperation of a slider and a guide groove, and at the same time reduce the occupation of the thickness space by the belt adjustment block; the transmission belt can be easily adjusted for tightness by using the adjustment device, which is convenient for installation and disassembly; although the tightness of the belt can be adjusted, it needs to be disassembled for adjustment and cannot achieve automatic adjustment of the belt tightness. Summary of the Utility Model

[0005] In order to solve the above problems of the prior art, the utility model provides a base belt drive structure.

[0006] In order to achieve the above object, the main technical solutions adopted by the utility model include:

[0007] A base belt drive structure includes a drive belt connected to an arm; one end of the drive belt is connected with a synchronous pulley, and the other end is connected with a drive pulley; the drive pulley is connected to the output shaft of a motor; an automatic tensioning component is connected to the middle of the drive belt; the automatic tensioning component includes an adjustment plate; the adjustment plate is connected to a rotating shaft and can rotate around the rotating shaft; a tension pulley in abutting cooperation with the drive belt is connected to the adjustment plate; the adjustment plate is connected with a spring through a first fixing part, and the spring always applies a force to the adjustment plate so that the adjustment plate drives the tension pulley to have a tendency to move towards the drive belt with the rotating shaft as the rotation center and makes the tension pulley closely adhere to the drive belt.

[0008] Further, a guiding groove is provided on the regulating plate; a guiding member is fitted in the guiding groove.

[0009] Further, one end of the spring away from the first fixing portion is connected to the second fixing portion.

[0010] Further, the tension pulley is provided with edge guards located on both sides of the transmission belt.

[0011] Further, the arm portion includes an arm sheet metal fixedly connected to the base; an outer cover of the arm is connected to the outside of the arm sheet metal; the transmission belt is arranged in the internal space formed after the connection of the arm sheet metal and the outer cover of the arm.

[0012] Further, mounting holes are provided on the arm sheet metal; bearings are arranged in the mounting holes; the inner ring of the bearing is non-rotatably connected to the connecting seat; the connecting seat is non-rotatably connected to the synchronous pulley.

[0013] Further, a handle is movably connected to the arm sheet metal; a receiving groove for receiving the handle is provided on the outer cover of the arm.

[0014] Further, the handle includes a connecting portion movably connected to the arm sheet metal; the connecting portion includes a rotating portion and a limiting groove; a receiving cavity for receiving the connecting portion is provided on the arm sheet metal; a guiding sliding groove cooperating with the rotating portion and a limiting post cooperating with the limiting groove are arranged in the receiving cavity; the limiting post is arranged at the bottom of the receiving cavity; the axial direction of the limiting post is parallel to the extending direction of the guiding sliding groove.

[0015] Further, a limiting baffle is provided at one end of the guiding sliding groove away from the bottom of the receiving cavity; the extending direction of the guiding sliding groove is a horizontal direction.

[0016] The beneficial effects of the present utility model are as follows: through the automatic tensioning assembly, automatic adjustment of the tension pulley can be achieved, enabling it to always abut against the transmission belt, ensuring that the transmission belt is always in a tensioned state, and enabling the transmission pulley to maintain synchronous rotation with the synchronous pulley; through the automatic adjustment of the tightness of the transmission belt, adverse problems caused by manual adjustment are avoided, and the production efficiency is improved. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is an exploded view of the structure of the present utility model;

[0019] Figure 2 It is an enlarged view of part A of the present utility model;

[0020] Figure 3 It is an exploded view of the structure of the present utility model Figure 2 ;

[0021] Figure 4 It is an enlarged view of part B of the present utility model;

[0022] Figure 5 It is a schematic diagram of the arm part of the present utility model;

[0023] Figure 6 It is a cross-sectional view taken along line C-C of the present utility model;

[0024] Explanation of reference numerals in the drawings:

[0025] 100, arm part; 110, sheet metal of the arm part; 111, mounting hole; 112, connecting seat; 113, bearing; 114, accommodating cavity; 1141, guiding chute; 1142, limiting post; 1143, limiting baffle; 120, outer cover of the arm part; 121, handle; 1211, connecting part; 1212, rotating part; 1213, limiting groove; 122, accommodating groove; 130, drive belt; 131, synchronous pulley; 132, drive wheel; 133, motor output shaft; 140, base; 200, adjusting plate; 201, guiding groove; 202, guiding member; 210, tensioning pulley; 211, edge guard; 220, rotating shaft; 230, first fixing part; 240, spring; 250, second fixing part. Detailed implementation manners

[0026] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. shall be understood in a broad sense. For example, "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] For the embodiments, please refer to Figure 1-2 as shown in

[0030] A base belt drive structure includes a drive belt 130 connected to the arm portion 100; one end of the drive belt 130 is connected to a synchronous pulley 131, and the other end is connected to a drive pulley 132; the drive pulley 132 is connected to the motor output shaft 133; the rotation of the motor output shaft 133 drives the drive pulley 132 to rotate, and then drives the synchronous pulley 131 to rotate; the size of the synchronous pulley 131 is generally larger than that of the drive pulley 132; in order to ensure the normal operation of the drive belt 130, an automatic tensioning component is connected to the middle of the drive belt 130.

[0031] The automatic tensioning assembly includes an adjusting plate 200; the adjusting plate 200 is connected to a rotating shaft 220 and can rotate around the rotating shaft 220; the rotating shaft 220 can be a conventional rotating shaft 220 component or can be replaced by a screw. Since the adjusting plate 200 is a plate-like structure and the rotation angle requirement during the operation of the adjusting plate 200 is not large, the external thread on the screw has little influence on the rotation of the adjusting plate 200, so a screw can be used as the rotating shaft 220; using a screw as the rotating shaft 220 can facilitate installation, and the nut part of the screw can directly act as a limit for the adjusting plate 200 to prevent it from detaching from the screw, saving costs and reducing the installation difficulty; a tensioning wheel 210 that abuts and cooperates with the transmission belt 130 is connected to the adjusting plate 200; the adjusting plate 200 is connected to a spring 240 through a first fixing portion 230; the spring 240 always applies a force to the adjusting plate 200, so that the adjusting plate 200 can rotate around the rotating shaft 220 as the center of rotation, driving the tensioning wheel 210 to move towards the direction of the transmission belt 130, so that the tensioning wheel 210 always closely adheres to the transmission belt 130, realizing automatic tensioning of the transmission belt 130;

[0032] In one embodiment, after the spring 240 is stretched, it applies a pulling force to force the tensioning wheel 210 to always abut against the transmission belt 130; as Figure 2 shown, the lower end of the spring 240 is connected to the adjusting plate 200 through the first fixing portion 230, and the upper end of the spring 240 is connected to a second fixing portion 250; at this time, the spring 240 is stretched. Since the position of the second fixing portion 250 is fixed, the spring 240 has a tendency to contract, which will drive the adjusting plate 200 to have a tendency to rotate counterclockwise, and the tensioning wheel 210 can always abut against the transmission belt 130; in this embodiment, the shape of the adjusting plate 200 is similar to a triangle, and the first fixing portion 230, the rotating shaft 220, and the tensioning wheel 210 are respectively arranged at a corner; it should be understood that the shape of the adjusting plate 200 can also be any other shape, as long as the position of the first fixing portion 230 is set away from the rotating shaft 220, it can drive the adjusting plate 200 to rotate around the rotating shaft 220, so as to utilize the force applied by the spring 240; the second fixing portion 250 can be a screw fixedly connected to the arm sheet metal 110;

[0033] In one embodiment, after the spring 240 is compressed, it applies a pushing force to force the tensioning wheel 210 to always abut against the transmission belt 130, see Figure 2 , in this state, as long as the second fixing portion 250 is arranged below the first fixing portion 230, the elastic force of the compressed spring 240 can be used to push the adjusting plate 200 to have a tendency to rotate counterclockwise;

[0034] In one embodiment, a guiding groove 201 is provided on the adjusting plate 200, and a guiding member 202 is fitted in the guiding groove 201; the guiding member 202 can be a screw fixedly connected to the arm sheet metal 110; the cooperation between the guiding groove 201 and the guiding member 202 can improve the stability of the rotation of the adjusting plate 200 and can also be used to limit the rotatable angle of the adjusting plate 200;

[0035] In one embodiment, edge guards 211 are provided on the tension pulley 210 on both sides of the transmission belt 130; the edge guards 211 abut against the edges of the transmission belt 130 to ensure the stability of the abutment between the tension pulley 210 and the transmission belt 130;

[0036] In one embodiment, the arm portion 100 includes an arm sheet metal 110 fixedly connected to the base 140; an outer cover 120 of the arm is connected to the outside of the arm sheet metal 110; the transmission belt 130 is disposed in the internal space formed after the connection between the arm sheet metal 110 and the outer cover 120 of the arm; mounting holes 111 are provided on the arm sheet metal 110; bearings 113 are provided in the mounting holes 111; the outer ring of the bearing 113 is connected to the mounting hole 111; the inner ring of the bearing 113 is non-rotatably connected to the connecting seat 112; the connecting seat 112 is non-rotatably connected to the synchronous pulley 131; the synchronous pulley 131 is fixedly connected to the connecting seat 112 by several screws to form a non-rotatable connection; the connecting seat 112 is connected to the lamp head assembly, and when the synchronous pulley 131 rotates, the lamp head assembly can be driven to rotate, realizing the swinging action of the stage lamp;

[0037] As Figures 3-6 shown, in one embodiment, a handle 121 is movably connected to the arm sheet metal 110; a receiving groove 122 for receiving the handle 121 is provided on the arm sheet metal 110; the handle 121 includes a connecting portion 1211 movably connected to the arm sheet metal 110; the connecting portion 1211 includes a rotating portion 1212 and a limiting groove 1213; a receiving cavity 114 for receiving the connecting portion 1211 is provided on the arm sheet metal 110; a guiding sliding groove 1141 cooperating with the rotating portion 1212 and a limiting post 1142 cooperating with the limiting groove 1213 are provided in the receiving cavity 114; the limiting post 1142 is disposed at the bottom of the receiving cavity 114; the axial direction of the limiting post 1142 is parallel to the extending direction of the guiding sliding groove 1141, which can ensure that the limiting post 1142 can be smoothly inserted into the limiting groove 1213 during guiding; Figure 3 In the figure, the handle 121 is in the retracted state, and the rotating portion 1212 and Figure 4It is engaged with the right end of the middle guiding chute 1141. When in use, pick up the handle 121 and rotate it counterclockwise by 90°. At this time, the connecting part 1211 of the handle 121 will be relative to the accommodating cavity 114. Further push the handle 121 inward, and the rotating part 1212 will slide along the direction of the guiding chute 1141. The limiting post 1142 is inserted into the limiting groove 1213, and the position of the handle 121 is fixed. At this time, the handle 121 cannot rotate relative to the rotating part 1212, and the base 140 can be carried more conveniently; in an embodiment, the extending direction of the guiding chute 1141 is the horizontal direction, so that the handle 121 can be in a horizontal state after being fixed; in an embodiment, the position of the handle 121 can also be not fixed for use, and the handle 121 can be directly rotated to pick up the base 140; in an embodiment, a limiting baffle 1143 is provided at one end of the guiding chute 1141 away from the bottom of the accommodating cavity 114. By providing the limiting baffle 1143, the limiting baffle 1143 is used as a detachable structure, which can facilitate the installation and disassembly of the handle 121.

[0038] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A base belt transmission structure, characterized in that: The invention comprises a transmission belt (130) connected to an arm (100); one end of the transmission belt (130) is connected to a synchronous wheel (131), and the other end is connected to a transmission wheel (132); the transmission wheel (132) is connected to a motor output shaft (133); the middle part of the transmission belt (130) is connected to an automatic tensioning assembly; the automatic tensioning assembly comprises an adjustment plate (200); the adjustment plate (200) is connected to a rotating shaft (220) and can rotate around the rotating shaft (220) The adjusting plate (200) is connected to a tensioning wheel (210) that abuts against the transmission belt (130); the adjusting plate (200) is connected to a spring (240) through a first fixing portion (230) that always applies force to the adjusting plate (200) so that the adjusting plate (200) drives the tensioning wheel (210) with the rotating shaft (220) as the rotation center, has a tendency to move in the direction of the transmission belt (130), and makes the tensioning wheel (210) close to the transmission belt (130).

2. A base belt transmission structure according to claim 1, characterized in that: The adjustment plate (200) is provided with a guide groove (201); a guide piece (202) is matched in the guide groove (201).

3. A base belt transmission structure according to claim 1, characterized in that: One end of the spring (240) away from the first fixing portion (230) is connected to the second fixing portion (250).

4. A base belt transmission structure according to claim 1, characterized in that: The tension wheel (210) is provided with edge guards (211) located on both sides of the transmission belt (130).

5. The base belt transmission structure according to claim 1, characterized in that: The arm (100) comprises an arm sheet metal (110) fixedly connected to a base (140); the arm sheet metal (110) is externally connected to an arm outer cover (120); and the transmission belt (130) is arranged in an internal space formed after the arm sheet metal (110) and the arm outer cover (120) are connected.

6. A base belt transmission structure according to claim 5, characterized in that: The arm sheet metal (110) is provided with a mounting hole (111); a bearing (113) is provided in the mounting hole (111); the inner ring of the bearing (113) is connected to a connecting seat (112) in a rotation-proof manner; and the connecting seat (112) is connected to a synchronous wheel (131) in a rotation-proof manner.

7. A base belt transmission structure according to claim 5, characterized in that: A handle (121) is movably connected to the arm metal plate (110); and a receiving groove (122) for receiving the handle (121) is provided on the arm outer cover (120).

8. A base belt transmission structure according to claim 7, characterized in that: The handle (121) comprises a connecting portion (1211) movably connected to the arm sheet metal (110); the connecting portion (1211) comprises a rotating portion (1212) and a limiting groove (1213); a receiving cavity (114) capable of receiving the connecting portion (1211) is provided on the arm sheet metal (110); a guide groove (1141) cooperating with the rotating portion (1212) and a limiting column (1142) cooperating with the limiting groove (1213) are provided in the receiving cavity (114); the limiting column (1142) is arranged at the bottom of the receiving cavity (114); and the axial direction of the limiting column (1142) is parallel to the extension direction of the guide groove (1141).

9. A base belt transmission structure according to claim 8, characterized in that: A limiting baffle (1143) is provided at one end of the guide slot (1141) away from the bottom of the accommodating cavity (114); the extending direction of the guide slot (1141) is a horizontal direction.

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