Gear transmission and pan-tilt camera

Abstract

The present invention discloses a gear transmission device and a pan-tilt camera. The gear transmission device includes a base, a motor, a driving gear, and a driven gear. One side of the motor is rotatably connected to the base, and the other side is connected to the base via an elastic member. The driving gear is mounted on the output shaft of the motor. The driven gear is rotatably mounted on the base and meshes with the driving gear. The elastic member pulls the motor toward the driven gear to fully mesh the driving gear and the driven gear. The gear transmission device of the present invention automatically compensates for gear meshing clearance, thereby improving transmission accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission devices, and in particular to a gear transmission device and a pan / tilt camera using the gear transmission device. Background Art

[0002] In industrial automation, most gear transmissions are connected by structural components, with two meshing gears maintaining a fixed relative position. Traditional gear transmissions can wear out over long periods of time, making it difficult for the transmission's output to maintain its original accuracy. In gear transmissions requiring precise positioning, gear wear requires complex disassembly, manual adjustment to eliminate meshing clearances, and reinstallation. Summary of the Invention

[0003] The main purpose of the present invention is to provide a gear transmission device, which is intended to automatically compensate for gear meshing clearance and improve transmission accuracy.

[0004] To achieve the above-mentioned object, the gear transmission device proposed by the present invention includes:

[0005] base;

[0006] a motor, one side of the motor being rotatably connected to the base, and the other side of the motor being connected to the base via an elastic member;

[0007] A driving gear, the driving gear being provided on the output shaft of the motor; and

[0008] A driven gear, the driven gear being rotatably mounted on the base and meshing with the driving gear;

[0009] The elastic member pulls the motor to deflect toward the driven gear, so that the driving gear is fully engaged with the driven gear.

[0010] Optionally, the motor is arranged on one side of the base, the driven gear and the driving gear are arranged on the side of the base facing away from the motor, the base is provided with a through hole corresponding to the driving gear, the output shaft of the motor is movably passed through the through hole and connected to the driving gear.

[0011] Optionally, the diameter of the through hole is larger than the diameter of the output shaft.

[0012] Optionally, a mounting post is provided on the side of the base facing the motor, and the mounting post is arranged adjacent to the motor. A first connecting ear and a second connecting ear are respectively provided on opposite sides of the motor, and the first connecting ear is rotatably connected to the mounting post, and the second connecting ear is connected to the elastic member.

[0013] Optionally, the gear transmission device further includes a rotating assembly, which includes a sleeve and a connecting plate provided on the outer peripheral wall of the sleeve, the sleeve is rotatably sleeved on the mounting column, and the connecting plate is connected to the first connecting ear.

[0014] Optionally, a limiting hole is provided at one end of the mounting post facing away from the base, the rotating assembly further comprises a limiting member, one end of the limiting member is passed through the limiting hole, the other end of the limiting member is provided with a stop platform, the stop platform, the mounting post and the base together form a limiting groove, the sleeve is rotatably sleeved on the mounting post and movably limited in the limiting groove;

[0015] And / or, the first connecting ear is provided with a first connecting hole, the connecting plate is provided with a fixing hole, and the rotating assembly further comprises a fixing member, the fixing member sequentially passing through the fixing hole and the first connecting hole to connect the first connecting ear and the connecting plate;

[0016] And / or, a side edge of the connecting plate adjacent to the motor is an arc-shaped edge, and the arc-shaped edge is adapted to the outer wall surface of the motor.

[0017] Optionally, a limiting column is further provided on the side of the base facing the motor, and the limiting column is spaced apart from the mounting column. The elastic member is a tension spring, one end of the tension spring is sleeved on the limiting column, and the other end is connected to the second connecting ear.

[0018] Optionally, a fixing column is further provided on the side of the base facing the motor, and the fixing column is arranged adjacent to the limiting column. The gear transmission device also includes a pressure plate, which is connected to the end of the fixing column away from the base, and the pressure plate abuts against the end of the limiting column away from the base.

[0019] Optionally, a convex rib is provided on a side of the base facing the motor, and the convex rib is arranged around the through hole and movably abuts against an end face of the motor.

[0020] The present invention further provides a pan-tilt camera, which includes a camera and the gear transmission device as described above, wherein the driven gear of the gear transmission device is connected to the camera.

[0021] The technical solution of the present invention utilizes a motor that is rotatably mounted on a base and connected to the base via an elastic member on the other side. The motor can then rotate by a certain angle relative to the base, using the side rotatably connected to the base as the center of rotation. This allows the motor to be pulled by the elastic member and deflected by the base. In this way, a driving gear is mounted on the motor's output shaft, meshing with a driven gear on the base. When a gap forms between the two gears due to wear, the elastic member pulls the motor toward the driven gear, automatically eliminating the gap between the two gears and ensuring full engagement. This achieves automatic compensation for backlash after gear wear, improving transmission accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of an embodiment of a gear transmission device of the present invention;

[0024] Figure 2 An exploded view of an embodiment of a gear transmission device of the present invention;

[0025] Figure 3 A top view of an embodiment of a gear transmission device of the present invention;

[0026] Figure 4 It is a bottom view of an embodiment of a gear transmission device of the present invention.

[0027] Description of Figure Numbers:

[0028] Label name Label name 100 gear transmission 3 elastic parts 1 base 4 driving gear 11 Via 5 driven gear 12 Mounting Column 6 Rotating components 121 Limiting hole 61 sleeve 13 First connecting ear 62 Connecting plate 131 First connecting hole 621 fixing holes 14 Second connecting ear 63 Limiting parts 15 Limit column 631 Stop platform 16 Fixed column 64 Fixing parts 17 ribs 7 pressure plate 2 motor

[0029] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention provides a gear transmission device 100 .

[0034] Please refer to Figure 1 、 Figure 3 and Figure 4 In an embodiment of the present invention, the gear transmission device 100 includes a base 1, a motor 2, a driving gear 4 and a driven gear 5. One side of the motor 2 is rotatably connected to the base 1, and the other side is connected to the base 1 through an elastic member 3; the driving gear 4 is provided on the output shaft of the motor 2; the driven gear 5 is rotatably provided on the base 1 and meshes with the driving gear 4; wherein the elastic member 3 pulls the motor 2 toward the driven gear 5 to deflect so that the driving gear 4 and the driven gear 5 are fully meshed.

[0035] In this embodiment, the motor 2 and the driven gear 5 are arranged on the same side of the base 1 (not shown). It can be understood that by providing a groove on the base 1, the motor 2 is partially accommodated in the groove. At the same time, two connecting parts are convexly provided on the outer peripheral surface of the motor 2, one connecting part is rotatably connected to the base 1, and the other connecting part is connected to the base 1 through the elastic member 3. In other words, the base 1 is arranged in a "J" shape. Specifically, the motor 2 can be connected to the periphery of the groove notch. At the same time, the base 1 is rotatably provided with a driven gear 5, which meshes with the driving gear 4 on the output shaft. Of course, in other embodiments, the motor 2 and the driven gear 5 can also be arranged on opposite sides of the base 1, and the output shaft of the motor 2 passes through the base 1 and is connected to the driving gear 4, which meshes with the driven gear 5.

[0036] Specifically, elastic member 3 extends in the direction of the line connecting driving gear 4 and driven gear 5. One end of elastic member 3 is connected to motor 2, while the other end extends toward driven gear 5 and is connected to base 1. Thus, the elastic force generated by elastic member 3 pulls motor 2, causing driving gear 4 to consistently move toward driven gear 5. Elastic member 3 can optionally be a spring, rubber band, or other elastic material, without limitation.

[0037] In this embodiment, the rotational connection between the motor 2 and the base 1 can be connected through a rotating connector, or a rotating shaft can be set on the base 1, and an axial hole can be set on one side of the motor 2, and the rotating shaft is passed through the axial hole to achieve the rotational connection.

[0038] The technical solution of the present invention is to rotatably mount one side of motor 2 on base 1, and connect the other side of motor 2 to base 1 via elastic member 3. Motor 2 can then use the side rotatably connected to base 1 as the center of rotation, pulled by elastic member 3, to deflect relative to base 1 by a certain angle. In this way, a driving gear 4 is disposed on the output shaft of motor 2, and driving gear 4 meshes with a driven gear 5 on base 1. When a gap forms between the two gears due to wear, elastic member 3 pulls motor 2 toward driven gear 5, automatically eliminating the gap between driving gear 4 and driven gear 5, and ensuring full meshing of driving gear 4 and driven gear 5. This achieves automatic compensation for backlash after gear wear, improving transmission accuracy.

[0039] like Figure 2 As shown, in one embodiment, the motor 2 is arranged on one side of the base 1, the driven gear 5 and the driving gear 4 are arranged on the side of the base 1 facing away from the motor 2, and the base 1 is provided with a through hole 11 corresponding to the driving gear 4. The output shaft of the motor 2 is movably passed through the through hole 11 and connected to the driving gear 4.

[0040] In this embodiment, the base 1 is plate-shaped, and the motor 2 is disposed on one side of the base 1. It is understood that when the gear transmission device 100 is mounted horizontally, the base 1 is on a horizontal surface, and the motor 2 is located on the upper surface of the base 1, supported by the upper surface of the base 1. Furthermore, in one embodiment, the diameter of the through hole 11 is larger than the diameter of the output shaft. Thus, the output shaft can move through the through hole 11 and mesh with the driven gear 5 via the driving gear 4 to achieve transmission, preventing the wall of the through hole 11 from blocking the output shaft and affecting the deflection of the motor 2. In one embodiment, a rib 17 is provided on the side of the base 1 facing the motor 2. The rib 17 is disposed around the through hole 11 and movably abuts against the end face of the motor 2. It is understood that when the motor 2 is supported by the base 1, the rib 17 movably abuts against the end face of the motor 2, preventing the motor 2 from directly abutting the base 1, reducing the contact area with the motor 2, and facilitating the deflection of the motor 2.

[0041] In this embodiment, the base 1 is further provided with a rotating shaft, to which the driven gear 5 is fixed, allowing rotation relative to the base 1. A mounting hole is also provided at the center of the rotating shaft, which can be used to connect to an external device. For example, the rotating shaft can be mounted in the mounting hole. In other words, the driving gear 4 drives the driven gear 5 to rotate, thereby driving the external device through the rotating shaft. This allows transmission to be achieved by meshing the external device with the driven gear 5, or by attaching the rotating shaft through the mounting hole to connect to the external device, improving adaptability.

[0042] In one embodiment, a mounting post 12 is provided on the side of the base 1 facing the motor 2. The mounting post 12 is arranged adjacent to the motor 2. A first connecting ear 131 and a second connecting ear 14 are respectively provided on opposite sides of the motor 2. The first connecting ear 131 is rotatably connected to the mounting post 12, and the second connecting ear 14 is connected to the elastic member 3.

[0043] In this embodiment, the first connecting ear 131 and the second connecting ear 14 are located on opposite sides of the motor 2 and are arranged adjacent to the base 1 to facilitate connection with the base 1. Optionally, the mounting post 12 and the base 1 adopt an integrally formed structure to facilitate production and reduce installation steps. Of course, welding, clamping or threaded connection can also be used for connection, which is not limited here. Specifically, the mounting post 12 is arranged adjacent to the first connecting ear 131. Optionally, a rotation hole is opened on the first connecting ear 131, and the first connecting ear 131 is rotated and sleeved on the mounting post 12 through the rotation hole to achieve rotational connection between the motor 2 and the base 1. Of course, the mounting post 12 and the first connecting ear 131 can also be connected separately by a rotating rod, specifically by rotating one end of the rotating rod onto the mounting post 12 and the other end fixedly connected to the first connecting ear 131, such as a screw connection, to achieve rotation of the motor 2. At the same time, the second connecting ear 14 is connected to one end of the elastic member 3 by clamping or sleeve connection.

[0044] In one embodiment, the gear transmission device 100 further includes a rotating assembly 6 , which includes a sleeve 61 and a connecting plate 62 provided on the outer peripheral wall of the sleeve 61 . The sleeve 61 is rotatably sleeved on the mounting column 12 , and the connecting plate 62 is connected to the first connecting ear 131 .

[0045] In this embodiment, the sleeve 61 and the connecting plate 62 can optionally be connected by an integrally formed structure or by welding to improve connection stability. It is understood that the inner wall of the sleeve 61 is adapted to the outer wall of the mounting post 12 so that it can be rotatably sleeved on the mounting post 12. The connection method between the connecting plate 62 and the first connecting ear 131 can optionally be a snap connection, adhesive bonding, welding, or screw connection. In one embodiment, the first connecting ear 131 is provided with a first connecting hole 131, and the connecting plate 62 is provided with a fixing hole 621. The rotating assembly 6 also includes a fixing member 64, which passes through the fixing hole 621 and the first connecting hole 131 in sequence to connect the first connecting ear 131 and the connecting plate 62. The fixing member 64 can optionally be a screw or bolt. It is understood that there is a gap between the connecting plate 62 and the base 1. When the elastic member 3 pulls the motor 2 to rotate, the motor 2 is connected to the connecting plate 62 to rotate relative to the base 1 through the sleeve 61. It is understandable that during the installation process, the connecting plate 62 may be connected to the first connecting ear 131 first, and then the motor 2 may be installed on the base 1 , and the sleeve 61 may be sleeved on the mounting column 12 .

[0046] In one embodiment, one side of the connecting plate 62 adjacent to the motor 2 is an arcuate side, which mates with the outer wall of the motor 2. It will be appreciated that, since the mounting post 12 is positioned adjacent to the motor 2, when the sleeve 61 is sleeved on the mounting post 12, the sleeve 61 is dimensioned so as not to contact the motor 2. In this case, one side of the connecting plate 62 is an arcuate side that mates with the outer wall of the motor 2, and a certain gap exists between the connecting plate 62 and the motor 2. Therefore, when the sleeve 61 rotates, the motor 2 can slide along the arcuate side of the connecting plate 62.

[0047] Please continue to refer to Figure 2 In one embodiment, a limiting hole 121 is provided at one end of the mounting post 12 facing away from the base 1, and the rotating assembly 6 further includes a limiting member 63, one end of the limiting member 63 is passed through the limiting hole 121, and the other end of the limiting member 63 is provided with a stop platform 631, and the stop platform 631, the mounting post 12 and the base 1 are enclosed to form a limiting groove, and the sleeve 61 is rotatably sleeved on the mounting post 12 and movably limited in the limiting groove.

[0048] In this embodiment, the limiting hole 121 is adapted to the limiting member 63, and the limiting member 63 can be optionally a screw, a pin, or a rivet, etc., which is not limited here. When the limiting member 63 is installed in the limiting hole 121, the stopper 631 of the limiting member 63, the mounting column 12, and the base 1 are enclosed to form a limiting groove to limit the sleeve 61 mounted on the mounting column 12 to prevent the sleeve 61 from falling off. It is understandable that the sleeve 61 is first mounted on the mounting column 12, and then one end of the limiting member 63 is inserted into the limiting hole 121. At this time, there is a certain gap between the side of the stopper 631 facing the sleeve 61 and the sleeve 61, such as 2mm or 3mm, so as to prevent the stopper 631 from abutting against the sleeve 61 and affecting the rotation of the sleeve 61.

[0049] In one embodiment, a limiting column 15 is further provided on the side of the base 1 facing the motor 2. The limiting column 15 is spaced apart from the mounting column 12. The elastic member 3 is a tension spring. One end of the tension spring is sleeved on the limiting column 15, and the other end is connected to the second connecting ear 14.

[0050] In this embodiment, a hook is provided at one end of the tension spring and a snap ring at the other. Furthermore, a snap hole is provided in the second connecting lug 14. The hook of the tension spring is hooked into the snap hole of the second connecting lug 14, and the snap ring is sleeved onto the retaining post 15, facilitating installation and improving installation efficiency. Optionally, the retaining post 15 and the base 1 can be integrally formed or welded together. It is understood that the retaining post 15 is closer to the driven gear 5 than the driving gear 4.

[0051] In one embodiment, a fixing column 16 is further provided on the side of the base 1 facing the motor 2, and the fixing column 16 is arranged adjacent to the limiting column 15. The gear transmission device 100 also includes a pressure plate 7, which is connected to the end of the fixing column 16 away from the base 1, and the pressure plate 7 abuts against the end of the limiting column 15 away from the base 1.

[0052] In this embodiment, the pressure plate 7 abuts one end of the limiting post 15. After the tension spring is installed, one end of the tension spring is sleeved on the limiting post 15, preventing the tension spring from falling off and improving the installation stability of the tension spring. Optionally, the pressure plate 7 and the fixing post 16 are connected by a detachable connection method such as a snap connection, a screw connection, or a pin connection to improve the convenience of assembly and disassembly. This connection method is not limited here.

[0053] The present invention further provides a pan-tilt camera, comprising a camera head and a gear transmission device 100. The specific structure of the gear transmission device 100 is similar to that of the aforementioned embodiments. Since the present pan-tilt camera utilizes all the technical solutions of all the aforementioned embodiments, it at least possesses all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore, a detailed description thereof will not be repeated here. Specifically, the driven gear 5 of the gear transmission device 100 is connected to the camera head.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. A gear transmission device, characterized in that: The gear transmission device comprises: base; a motor, one side of the motor being rotatably connected to the base, and the other side of the motor being connected to the base via an elastic member; A driving gear, the driving gear being provided on the output shaft of the motor; and A driven gear, the driven gear being rotatably mounted on the base and meshing with the driving gear; Wherein, the elastic member pulls the motor to deflect toward the driven gear, so that the driving gear and the driven gear are fully engaged; The motor is arranged on one side of the base, the driven gear and the driving gear are arranged on the side of the base facing away from the motor, the base is provided with a through hole corresponding to the driving gear, the output shaft of the motor is movably arranged through the through hole and connected to the driving gear; A mounting post is provided on a side of the base facing the motor, the mounting post is arranged adjacent to the motor, and a first connecting ear and a second connecting ear are respectively provided on opposite sides of the motor, the first connecting ear is rotatably connected to the mounting post, and the second connecting ear is connected to the elastic member; The gear transmission device further includes a rotating assembly, the rotating assembly including a sleeve and a connecting plate provided on the outer peripheral wall of the sleeve, the sleeve is rotatably sleeved on the mounting post, and the connecting plate is connected to the first connecting ear; A side edge of the connecting plate adjacent to the motor is an arc-shaped edge, and the arc-shaped edge is adapted to the outer wall surface of the motor.

2. The gear transmission device according to claim 1, characterized in that: The diameter of the through hole is larger than the diameter of the output shaft.

3. The gear transmission device according to claim 1, wherein: A limiting hole is provided at one end of the mounting post facing away from the base, the rotating assembly further comprises a limiting member, one end of the limiting member is passed through the limiting hole, and the other end of the limiting member is provided with a stop platform, the stop platform, the mounting post and the base together form a limiting groove, the sleeve is rotatably sleeved on the mounting post and movably limited in the limiting groove; And / or, the first connecting ear is provided with a first connecting hole, the connecting plate is provided with a fixing hole, and the rotating assembly further includes a fixing member, which passes through the fixing hole and the first connecting hole in sequence to connect the first connecting ear and the connecting plate.

4. The gear transmission device according to claim 1, wherein: A limiting column is further provided on the side of the base facing the motor. The limiting column is spaced apart from the mounting column. The elastic member is a tension spring. One end of the tension spring is sleeved on the limiting column, and the other end is connected to the second connecting ear.

5. The gear transmission device according to claim 4, characterized in that: A fixing column is also provided on the side of the base facing the motor, and the fixing column is arranged adjacent to the limiting column. The gear transmission device also includes a pressure plate, which is connected to the end of the fixing column away from the base, and the pressure plate abuts against the end of the limiting column away from the base.

6. The gear transmission device according to claim 1, wherein: A convex rib is provided on a side of the base facing the motor. The convex rib is arranged around the through hole and movably abuts against the end surface of the motor.

7. A PTZ camera, characterized in that: The PTZ camera comprises: Camera; and The gear transmission device according to any one of claims 1 to 6, wherein the driven gear of the gear transmission device is connected to the camera.

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