Horizontal rotation driving module for projector

Abstract

The utility model discloses a horizontal rotation driving module of a projector, which comprises a module shell, a driving motor and a driving rotating shaft, the driving motor and the driving rotating shaft are respectively arranged in a shell accommodating cavity of the module shell, and the upper end part of the driving rotating shaft protrudes and extends to the upper end side of the module shell; a reduction gear set, a worm and gear transmission pair and a rotating shaft gear are arranged in a shell containing cavity of the module shell, a worm of the worm and gear transmission pair is connected with a power output shaft of the driving motor, and the rotating shaft gear is arranged on the periphery of the driving rotating shaft in a sleeving mode and is in clearance fit with the driving rotating shaft. The driving motor, the worm and gear transmission pair, the reduction gear pair and the rotating shaft gear are in driving connection in sequence; a lower-end nut is screwed at the lower end of the driving rotating shaft, a compression spring is sleeved at the upper end of the driving rotating shaft, the lower end of the compression spring abuts against the rotating shaft gear, and the rotating shaft gear abuts against and makes contact with the lower-end nut. By means of the structural design, the device has the advantages of being novel in structural design and good in stability and reliability.

Description

Technical Field

[0001] This utility model relates to the field of projector technology, and in particular to a projector horizontal rotation drive module. Background Technology

[0002] A Chinese utility model patent with patent number ZL202122028008.7 and patent name entitled "Multi-angle Adjustable Projector" discloses the following technical solution: A multi-angle adjustable projector includes a projector body and a rotating assembly for driving the projector body to rotate in the horizontal direction; the rotating assembly includes a housing, a rotary motor, a first driving gear, a first driven gear, a first bearing, and a first connecting shaft. One side wall of the housing is fixedly connected to the other end of the second connecting shaft. The rotary motor is fixed to the bottom wall of the housing. The first bearing is fixed to the top wall of the housing. The first driving gear is disposed at the output end of the rotary motor. The first driven gear is meshed with the first driving gear. One end of the first connecting shaft is fixedly connected to the first driven gear. The other end of the first connecting shaft passes through the first bearing and is fixedly connected to the projector body.

[0003] During the process of the aforementioned rotating component driving the projector body to rotate in the horizontal direction, the rotating motor drives the first drive gear to rotate, the first drive gear drives the first driven gear to rotate, and the first driven gear drives the projector body to rotate through the first connecting shaft, thereby realizing the horizontal angle adjustment of the projector body.

[0004] It should be noted that the aforementioned rotating component used to drive the projector body to rotate horizontally has the following drawbacks, specifically:

[0005] Defect 1: The rotary motor drives the first connecting shaft and the projector body to rotate horizontally through a gear transmission pair consisting of a first driving gear and a first driven gear. This drive module cannot achieve locking and positioning of the projector body, that is, it cannot guarantee that the projector body is locked in the required position, resulting in poor stability and reliability.

[0006] Defect 2: When the projector body is subjected to a large external impact, due to the lack of a slip protection structure, the projector body will directly transmit the force to the rotating motor, which can easily cause damage to the rotating motor and result in poor stability and reliability. Utility Model Content

[0007] The purpose of this utility model is to provide a projector horizontal rotation drive module that addresses the shortcomings of existing technologies. This projector horizontal rotation drive module has a novel structural design and good stability and reliability.

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0009] A projector horizontal rotation drive module includes a module housing, a drive motor, and a drive shaft. The drive shaft is rotatably mounted on the module housing and arranged vertically. The module housing has a housing cavity formed inside. The drive motor and the drive shaft are respectively installed in the housing cavity, and the upper end of the drive shaft protrudes and extends to the upper side of the module housing.

[0010] The module housing contains a reduction gear set, a worm gear transmission pair, and a rotating shaft gear. The worm of the worm gear transmission pair is connected to the power output shaft of the drive motor. The rotating shaft gear is fitted around the drive shaft with a clearance fit. The drive motor, worm gear transmission pair, reduction gear set, and rotating shaft gear are sequentially connected and driven.

[0011] A lower nut is screwed onto the lower end of the drive shaft. The shaft gear is located on the upper side of the lower nut. A compression spring is fitted onto the upper end of the drive shaft. The lower end of the compression spring abuts against the shaft gear, and the shaft gear is in pressure contact with the lower nut.

[0012] The drive shaft anti-rotation sleeve includes an upper spring washer located on the upper end side of the compression spring and a lower spring washer located on the lower end side of the compression spring. The upper end of the compression spring abuts against the upper spring washer, and the lower end of the compression spring abuts against the lower spring washer.

[0013] The upper surface of the upper spring washer is in contact with the module housing, and the lower surface of the lower spring washer is in contact with the rotating shaft gear.

[0014] An auxiliary washer is fitted around the drive shaft between the lower end nut and the shaft gear to prevent rotation. The shaft gear, the auxiliary washer, and the lower end nut press against each other in sequence from top to bottom.

[0015] The upper end of the drive shaft is screwed with an upper nut on the upper side of the module housing, and a connecting seat is fitted on the upper end of the drive shaft to prevent rotation. The connecting seat is vertically positioned between the module housing and the upper nut.

[0016] The reduction gear set includes an input gear and an output gear. The input gear is integrated with the worm wheel of the worm gear transmission pair, and the output gear meshes with the shaft gear.

[0017] The core of the drive shaft has a vertical through hole.

[0018] Compared with the prior art, the present invention has the following beneficial effects, specifically:

[0019] 1. The transmission assembly located between the drive shaft and the drive motor of this utility model includes a worm gear transmission pair and a reduction gear pair. The worm gear transmission pair and the reduction gear pair can realize the high torque output of the drive motor, thus making this utility model suitable for the rotation drive of heavy projectors. The worm gear transmission pair has a self-locking function. When the projector rotates to the required angle position, this utility model can effectively lock the projector in the required position, with good stability and reliability.

[0020] 2. This utility model has a slip protection function, which can effectively improve the stability and reliability during use;

[0021] 3. The projector horizontal rotation drive module of this utility model has the advantages of novel structural design and good stability and reliability. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is an exploded view of the present invention.

[0025] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0026] Figure 4 This is a partial structural schematic diagram of the present invention.

[0027] exist Figures 1 to 4 This includes:

[0028] 1-Module housing; 11-Housing cavity; 2-Drive motor; 3-Drive shaft; 31-Shaft through hole; 4-Reduction gear pair; 41-Input gear; 42-Output gear; 5-Worm gear transmission pair; 51-Worm; 52-Worm gear; 6-Shaft gear; 71-Lower nut; 72-Upper nut; 8-Compression spring; 91-Upper spring washer; 92-Lower spring washer; 93-Auxiliary washer; 100-Connecting seat. Detailed Implementation

[0029] The present invention will now be described in conjunction with specific embodiments.

[0030] Example 1, as Figures 1 to 4As shown, a projector horizontal rotation drive module includes a module housing 1, a drive motor 2, and a drive shaft 3. The drive shaft 3 is rotatably mounted on the module housing 1 and arranged vertically. The module housing 1 has a housing cavity 11 formed inside. The drive motor 2 and the drive shaft 3 are respectively installed in the housing cavity 11, and the upper end of the drive shaft 3 protrudes and extends to the upper side of the module housing 1.

[0031] Among them, such as Figures 2 to 4 As shown, the module housing 1 is equipped with a reduction gear set, a worm gear transmission pair 5, and a rotating shaft gear 6 within the housing cavity 11. The worm 51 of the worm gear transmission pair 5 is connected to the power output shaft of the drive motor 2. The rotating shaft gear 6 is fitted around the drive shaft 3 with a clearance fit. The drive motor 2, the worm gear transmission pair 5, the reduction gear pair 4, and the rotating shaft gear 6 are sequentially connected and driven.

[0032] Furthermore, such as Figures 2 to 4 As shown, a lower end nut 71 is screwed onto the lower end of the drive shaft 3, and the shaft gear 6 is located on the upper end side of the lower end nut 71. A compression spring 8 is fitted onto the upper end of the drive shaft 3, and the lower end of the compression spring 8 abuts against the shaft gear 6, and the shaft gear 6 is in abutting contact with the lower end nut 71.

[0033] It should be noted that the projector can be installed and connected to the upper end of the drive shaft 3, that is, the projector is located on the upper side of the module housing 1. When working, the projector rotates synchronously with the drive shaft 3.

[0034] In the process of driving the projector to rotate horizontally by the projector horizontal rotation drive module in this embodiment 1, the drive motor 2 drives the drive shaft 3 to rotate by sequentially driving the worm gear transmission pair 5, the reduction gear pair 4 and the rotating shaft gear 6. The drive shaft 3 then drives the projector to rotate synchronously, so as to realize the horizontal rotation adjustment angle position of the projector.

[0035] It should be emphasized that the transmission assembly located between the drive shaft 3 and the drive motor 2 in this embodiment includes a worm gear 51 transmission pair and a reduction gear pair 4. The worm gear transmission pair 51 and the reduction gear pair 4 enable the drive motor 2 to output high torque, thus making this embodiment suitable for rotating and driving heavy projectors. Furthermore, the worm gear transmission pair 51 has a self-locking function; when the projector rotates to the desired angle position, this embodiment can effectively lock the projector in the desired position, ensuring good stability and reliability.

[0036] It should be further emphasized that the elastic force of the compression spring 8 on the rotating shaft gear 6 creates a frictional force between the rotating shaft gear 6 and the lower nut 71. This frictional force causes the drive shaft 3 and the rotating shaft gear 6 to rotate synchronously. When the projector is subjected to a large external impact, the impact force will overcome the aforementioned frictional force and cause relative rotation between the rotating shaft gear 6 and the drive shaft 3, i.e., slippage. This prevents the impact force from being directly transmitted to the drive motor 2 and causing damage to the drive motor 2. Therefore, the projector horizontal rotation drive module of this embodiment has a slippage protection structure to effectively improve the stability and reliability during use.

[0037] In summary, the projector horizontal rotation drive module of this embodiment has the advantages of novel structural design and good stability and reliability through the above structural design.

[0038] Example 2, as Figures 2 to 4 As shown, the difference between this embodiment 2 and embodiment 1 is that the drive shaft 3 anti-rotation sleeve is equipped with an upper spring washer located on the upper end side of the compression spring 8 and a lower spring washer located on the lower end side of the compression spring 8. The upper end of the compression spring 8 abuts against the upper spring washer, and the lower end of the compression spring 8 abuts against the lower spring washer.

[0039] The upper surface of the upper spring washer is in contact with the module housing 1, and the lower surface of the lower spring washer is in contact with the rotating shaft gear 6.

[0040] Through the above-mentioned upper spring washer and lower spring washer design, this embodiment 2 can effectively increase the frictional force between the drive shaft 3 and the shaft gear 6.

[0041] It should be explained that the upper and lower spring washers of the drive shaft 3 are flat in shape, and the center holes of the upper and lower spring washers are flat holes. The above-mentioned flat structure can effectively ensure that the upper and lower spring washers are anti-rotationally fitted around the drive shaft 3.

[0042] Example 3, as Figure 2 and Figure 3 As shown, the difference between this embodiment 3 and embodiment 1 is that: an auxiliary washer 93 is fitted around the outer periphery of the drive shaft 3 between the lower end nut 71 and the shaft gear 6 to prevent rotation. The shaft gear 6, the auxiliary washer 93 and the lower end nut 71 press against each other in sequence from top to bottom.

[0043] The auxiliary shim 93 in this embodiment can effectively increase the frictional force between the drive shaft 3 and the shaft gear 6.

[0044] It should be explained that the auxiliary shim 93 of the drive shaft 3 is flat in shape, and the center hole of the auxiliary shim 93 is a flat hole. The above-mentioned flat structure can effectively ensure that the auxiliary shim 93 is fitted around the drive shaft 3 to prevent rotation.

[0045] Example 4, as Figures 1 to 3 The difference between this embodiment four and embodiment one is that: the upper end of the drive shaft 3 is screwed with an upper nut 72 on the upper end of the module housing 1, and the upper end of the drive shaft 3 is fitted with a connecting seat 100 to prevent rotation, and the connecting seat 100 is vertically limited between the module housing 1 and the upper nut 72.

[0046] The mounting bracket 100 of the drive shaft 3 is flat, and the mounting hole of the mounting bracket 100 is a flat hole. The above-mentioned flat structure can effectively ensure that the mounting bracket 100 is fixed to the outside of the drive shaft 3.

[0047] The projector can be installed on the connector 100, that is, the drive shaft 3 drives the projector to rotate horizontally through the connector 100.

[0048] Example 5, as Figure 4 As shown, the difference between this embodiment five and embodiment one is that the reduction gear set is provided with an input end gear 41 and an output end gear 42. The input end gear 41 and the worm wheel 52 of the worm gear transmission pair 5 are an integral structure, and the output end gear 42 meshes with the rotating shaft gear 6.

[0049] Example 6, as Figures 1 to 4 As shown, the difference between this sixth embodiment and the first embodiment is that the core of the drive shaft 3 is provided with a vertical through hole 31.

[0050] The through hole 31 of the drive shaft 3 can serve as a cable passage, allowing the projector's connection cable to pass through.

[0051] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A projector horizontal rotation drive module, comprising a module housing (1), a drive motor (2), and a drive shaft (3), wherein the drive shaft (3) is rotatably mounted on the module housing (1) and arranged vertically, the module housing (1) has a housing cavity (11) formed inside, the drive motor (2) and the drive shaft (3) are respectively installed in the housing cavity (11), and the upper end of the drive shaft (3) protrudes and extends to the upper end side of the module housing (1); Its features are: The module housing (1) is equipped with a reduction gear set, a worm gear transmission pair (5), and a rotating shaft gear (6) in the housing cavity (11). The worm (51) of the worm gear transmission pair (5) is connected to the power output shaft of the drive motor (2). The rotating shaft gear (6) is fitted around the drive shaft (3) and the rotating shaft gear (6) is clearance-fitted with the drive shaft (3). The drive motor (2), the worm gear transmission pair (5), the reduction gear pair (4), and the rotating shaft gear (6) are sequentially connected and driven. The lower end of the drive shaft (3) is screwed with a lower end nut (71), the shaft gear (6) is located on the upper side of the lower end nut (71), and the upper end of the drive shaft (3) is fitted with a compression spring (8). The lower end of the compression spring (8) abuts against the shaft gear (6), and the shaft gear (6) presses against the lower end nut (71).

2. The projector horizontal rotation drive module according to claim 1, characterized in that: The drive shaft (3) anti-rotation sleeve is equipped with an upper spring washer located on the upper end side of the compression spring (8) and a lower spring washer located on the lower end side of the compression spring (8). The upper end of the compression spring (8) abuts against the upper spring washer, and the lower end of the compression spring (8) abuts against the lower spring washer. The upper surface of the upper spring washer is in contact with the module housing (1), and the lower surface of the lower spring washer is in contact with the rotating shaft gear (6).

3. The projector horizontal rotation drive module according to claim 1, characterized in that: An auxiliary washer (93) is fitted around the drive shaft (3) between the lower end nut (71) and the shaft gear (6) to prevent rotation. The shaft gear (6), the auxiliary washer (93) and the lower end nut (71) press against each other from top to bottom.

4. A projector horizontal rotation drive module according to claim 1, characterized in that: The upper end of the drive shaft (3) is screwed with an upper nut (72) on the upper side of the module housing (1). The upper end of the drive shaft (3) is fitted with a connecting seat (100) to prevent rotation. The connecting seat (100) is vertically limited between the module housing (1) and the upper nut (72).

5. A projector horizontal rotation drive module according to claim 1, characterized in that: The reduction gear set is provided with an input end gear (41) and an output end gear (42). The input end gear (41) and the worm wheel (52) of the worm gear transmission pair (5) are integrated into one structure. The output end gear (42) meshes with the rotating shaft gear (6).

6. A projector horizontal rotation drive module according to claim 1, characterized in that: The core of the drive shaft (3) has a vertical through hole (31).

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