Transmission mechanism and pan-tilt camera

Abstract

The transmission mechanism comprises a fixing support, a driven wheel, a motor, a driving wheel and a transmission belt, the fixing support is provided with an installation opening and two fixing holes, the two fixing holes are formed in the two opposite sides of the installation opening in the radial direction of the installation opening respectively, and the driven wheel is connected to the fixing support; a motor base of the motor is arranged on the side, away from the driven wheel, of the fixed support, and a motor shaft of the motor penetrates through the mounting opening; the driving wheel is connected to a motor shaft; the transmission belt is arranged between the driven wheel and the driving wheel; wherein the motor base can rotate in the direction close to or away from the driven wheel relative to the mounting opening by taking a first fastening piece arranged in one of the fixing holes in a penetrating manner as a rotating shaft, and the transmission belt is configured to be preassembled between the driven wheel and the driving wheel by moving a motor shaft by a preset distance in the direction close to the driven wheel; and the transmission belt is tensioned by moving the motor shaft in a direction away from the driven wheel.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission mechanisms, in particular to a transmission mechanism and a pan / tilt camera. Background Art

[0002] When installing a transmission mechanism, the driven pulley is usually fixed first. One end of the gear is chamfered to facilitate belt installation. The driving pulley assembly is then fixed, and the belt is installed last. However, due to the preload on the belt, this installation method is difficult and there is a risk of the belt coming out. Utility Model Content

[0003] Based on this, it is necessary to provide a transmission mechanism to address the technical problem that the belt is difficult to install in the belt transmission method of the existing technology.

[0004] A transmission mechanism, comprising:

[0005] A fixing bracket, wherein the fixing bracket is provided with a mounting opening and two fixing holes, wherein the two fixing holes are respectively provided on opposite sides of the mounting opening along the radial direction of the mounting opening;

[0006] A driven wheel connected to the fixed bracket;

[0007] a motor, wherein the motor seat of the motor is arranged on a side of the fixing bracket away from the driven wheel, and the motor shaft of the motor is passed through the mounting opening;

[0008] A driving wheel connected to the motor shaft;

[0009] A transmission belt is stretched between the driven wheel and the driving wheel;

[0010] In which, the motor seat can rotate relative to the installation port in a direction close to or away from the driven wheel with the first fastener inserted into one of the fixing holes as the rotation axis, and the transmission belt is configured to be pre-installed between the driven wheel and the driving wheel by moving the motor shaft a preset distance in a direction close to the driven wheel, and to tighten the transmission belt by moving the motor shaft in a direction away from the driven wheel.

[0011] The present technical solution provides a transmission mechanism, in which a fixed bracket is used to support and connect a driven wheel, a motor, a driving wheel, a transmission belt, etc. By fixedly connecting the driving wheel to the motor shaft, the driving wheel is driven to rotate by the motor, and the driven wheel is connected to the fixed bracket, so that the transmission belt tensioned between the driven wheel and the driving wheel moves relative to the fixed bracket under the drive of the driven wheel, thereby realizing the transmission function. In the present technical solution, two fixing holes are provided on the fixed bracket, so that the first fastener and the second fastener pass through the two fixing holes respectively, so as to fix the motor base and the fixed bracket, so that the motor base can be fixed relative to the fixed bracket, thereby ensuring the normal operation of the transmission mechanism. A mounting port is provided on the fixed bracket so that the motor shaft of the motor can pass through, thereby facilitating connection with the driving wheel. The motor base is configured to rotate relative to the mounting opening, using a first fastener inserted into one of the fixing holes as the rotation axis, toward or away from the driven pulley. When installing the belt, the motor base is rotated to move the motor shaft toward the driven pulley by a preset distance, thereby reducing the distance between the driven pulley and the driving pulley, thereby facilitating the pre-installation of the transmission belt between the driven and driving pulleys. The motor base is then rotated in the opposite direction, causing the motor base to move the motor shaft away from the driven pulley, thereby tightening the transmission belt between the driving and driven pulleys. This facilitates transmission belt installation and improves the efficiency of transmission belt installation and replacement.

[0012] In one embodiment, the two fixing holes are defined as a first fixing hole for the first fastener to pass through and a second fixing hole for the second fastener to pass through; the fixing bracket is constructed with:

[0013] A guide groove is provided between the second fixing hole and the mounting opening. The guide groove is constructed as an arc concentric with the first fixing hole. The guide groove is for the third fastener to pass through and serves as a rotation guide for the motor base relative to the fixing bracket.

[0014] In this technical solution, by providing the above guide groove on the fixed bracket for the third fastener to pass through, it is convenient to guide the rotation of the motor base relative to the fixed bracket, so that the rotation of the motor base relative to the fixed bracket is smoother and more reliable.

[0015] In one embodiment, the third fastener is constructed with a step bolt, the optical axis section of the step bolt is arranged in the guide groove and passes through the first mounting hole opened in the motor base, and the threaded section of the step bolt is used for fastening with a nut.

[0016] The third fastener is configured in the form of a stepped bolt. When the smooth shaft section of the stepped bolt is arranged in the guide groove, it is convenient to cooperate with the groove wall of the guide groove to guide the rotation of the motor base relative to the fixed bracket. Moreover, by the cooperation of the smooth shaft section and the guide groove, the frictional resistance between the two can be reduced, making the guiding smoother. A first mounting hole corresponding to the guide groove is provided on the motor base to facilitate the stepped bolt passing through the first mounting hole, so that the motor base can be driven to move relative to the fixed bracket along the guide groove while the stepped bolt moves relative to the guide groove.

[0017] In one embodiment, one side of the motor base facing the fixed bracket has two ear plates arranged along the radial direction of the motor shaft. The first mounting hole is provided on one of the ear plates, and a second mounting hole corresponding to the second fixing hole is formed on the other ear plate.

[0018] By providing the ear plates on the motor base as described above and arranging the second mounting hole on the ear plate, the fixed connection between the motor base and the fixed bracket can be ensured without damaging other structures of the motor.

[0019] In one embodiment, the transmission mechanism further includes:

[0020] A lock piece is arranged on the side of the fixed bracket facing away from the motor base. The lock piece is provided with openings corresponding to the first fixing hole and the second fixing hole for the first fastener and the second fastener to pass through to fix the motor base.

[0021] By arranging the lock piece on the side of the fixed bracket facing away from the motor base, the reliability of the fixed connection between the electrolytic seat and the fixed bracket can be ensured.

[0022] In one embodiment, a first notch is provided on the edge of the lock piece facing the motor. The first notch corresponds to the mounting opening to avoid the motor shaft.

[0023] By providing the first notch corresponding to the mounting opening on the lock piece, the motor shaft can be avoided through the first notch, thereby preventing interference between the lock piece and the motor shaft.

[0024] In one embodiment, a second notch corresponding to the guide groove is provided on the edge of the lock piece facing the motor. The second notch is used for the third fastener to pass through.

[0025] By providing a second notch corresponding to the guide groove on the locking plate, on the one hand, it is convenient to pass the fastener through the second notch and the guide groove to guide the rotation of the motor base relative to the fixed bracket; on the other hand, providing the second notch in the form of a notch greatly reduces the position offset and alignment accuracy requirements between the second notch and the guide groove during the process of the fastener moving along the guide groove relative to the fixed bracket, thereby reducing the dimensional accuracy of the guide groove and the second notch, and thus reducing production costs.

[0026] In one embodiment, the locking piece is further provided with a folding portion extending in a direction away from the fixing bracket, and the folding portion is provided at an end portion of the locking piece close to the guide groove.

[0027] By providing the above-mentioned folding portion on the locking plate, when installing the transmission belt, force can be applied to the folding portion to drag the motor base to move relative to the fixed bracket, thereby improving the convenience of installing the transmission belt.

[0028] In one embodiment, the transmission mechanism further includes a mounting shaft, the mounting shaft is fixedly connected to the fixed bracket, and the driven wheel is rotatably connected to the mounting shaft.

[0029] By fixedly connecting the mounting shaft to the fixed bracket, the driven wheel is rotationally connected to the mounting shaft, so that the driven wheel can rotate relative to the fixed bracket.

[0030] In one embodiment, flanges extending in a radial direction are provided at both ends of the driven wheel and the driving wheel along their own axial directions to block the transmission belt.

[0031] Flanges extending in the radial direction are provided at both ends of the driven wheel and the driving wheel along their own axial directions, so that the transmission belt is blocked by the flanges, thereby preventing the transmission belt from falling off.

[0032] A pan-tilt camera comprises the transmission mechanism described above.

[0033] Beneficial effects of the utility model:

[0034] The utility model provides a transmission mechanism, in which a fixed bracket is used to support and connect a driven wheel, a motor, a driving wheel and a transmission belt. By fixedly connecting the driving wheel to the motor shaft, the driving wheel is driven to rotate by the motor, and the driven wheel is connected to the fixed bracket, so that the transmission belt tensioned between the driven wheel and the driving wheel moves relative to the fixed bracket under the drive of the driven wheel, thereby realizing the transmission function. In this technical solution, two fixing holes are provided on the fixed bracket, so that the first fastener and the second fastener pass through the two fixing holes respectively, so as to fix the motor base and the fixed bracket, so that the motor base can be fixed relative to the fixed bracket, thereby ensuring the normal operation of the transmission mechanism. A mounting port is provided on the fixed bracket so that the motor shaft of the motor can pass through, thereby facilitating connection with the driving wheel. The motor base is configured to rotate relative to the mounting opening, using a first fastener inserted into one of the fixing holes as the rotation axis, toward or away from the driven pulley. When installing the belt, the motor base is rotated to move the motor shaft toward the driven pulley by a preset distance, thereby reducing the distance between the driven pulley and the driving pulley, thereby facilitating the insertion of the transmission belt between the driven and driving pulleys. The motor base is then rotated in the opposite direction, causing the motor base to move the motor shaft away from the driven pulley, thereby tightening the transmission belt between the driving and driven pulleys. This facilitates installation of the transmission belt and improves the efficiency of belt installation and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic structural diagram of a transmission mechanism provided in one embodiment of the present utility model;

[0036] Figure 2 A schematic structural diagram of a transmission mechanism provided in one embodiment of the present utility model from another perspective;

[0037] Figure 3 A schematic diagram of the structure in which the fixed bracket is separated from the driven wheel and the driving wheel in the transmission mechanism provided by one embodiment of the present utility model;

[0038] Figure 4 This is an exploded schematic diagram of a transmission structure provided in one embodiment of the present utility model.

[0039] Reference numerals:

[0040] Fixed bracket 100; mounting opening 110; fixing hole 120; first fixing hole 121; second fixing hole 122; guide groove 130; driven pulley 200; flange 210; motor 300; motor shaft 310; motor base 320; ear plate 321; first mounting hole 3211; second mounting hole 3212; driving pulley 400; transmission belt 500; first fastener 601; second fastener 602; third fastener 603; locking plate 700; first notch 710; second notch 720; folded portion 730; mounting shaft 800. DETAILED DESCRIPTION

[0041] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. 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.

[0045] In the present utility model, unless otherwise clearly defined and limited, the first feature may be in direct contact with the second feature or in indirect contact with the second feature through an intermediate medium when the first feature is "on" or "under" the second feature. Moreover, when the first feature is "above", "over" or "on top of" the second feature, it may be directly above or obliquely above the second feature, or simply indicate that the first feature is at a higher level than the second feature in terms of horizontal height. When the first feature is "below", "beneath" or "underneath" the second feature, it may be directly below or obliquely below the second feature, or simply indicate that the first feature is at a lower level than the second feature in terms of horizontal height.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0047] In the current transmission mechanism, during installation, the driven wheel is always fixed first. One end of the gear has a chamfer to facilitate the installation of the belt. Then the driving wheel assembly is fixed, and finally the belt is installed. Since the belt has a certain pre-tightening force, it is difficult to install the belt and there is a risk of slipping off when using this installation method.

[0048] Based on this, the present utility model provides a transmission mechanism. By setting the motor base connected to the driving wheel to be rotatable around the first fastener relative to the mounting opening on the fixed bracket, the distance between the driven wheel and the driving wheel can be adjusted, so that when installing the belt, the distance between the driven wheel and the driving wheel is reduced to facilitate the installation of the belt.

[0049] Refer to Figures 1 to 3, an embodiment of the present utility model provides a transmission mechanism, which includes a fixed bracket 100, a driven wheel 200, a motor 300, a driving wheel 400 and a transmission belt 500. The fixed bracket 100 is provided with an installation opening 110 and two fixing holes 120. The two fixing holes 120 are respectively arranged on the opposite sides of the installation opening 110 along the radial direction of the installation opening 110. The driven wheel 200 is connected to the fixed bracket 100; the motor base 320 of the motor 300 is arranged on the side of the fixed bracket 100 away from the driven wheel 200, and the motor shaft 310 of the motor 300 passes through the installation opening 110; the driving wheel 400 is connected to the motor shaft 310; the transmission belt 500 is stretched between the driven wheel 200 and the driving wheel 400; wherein, the motor base 320 can rotate relative to the installation opening 110 along the direction of approaching or departing from the driven wheel 200 with a first fastener passing through one of the fixing holes 120 as the rotation axis, and the transmission belt 500 is configured to be pre-installed between the driven wheel and the driving wheel after moving the motor shaft 310 along the direction of approaching the driven wheel 200 by a preset distance, and the transmission belt 500 is tensioned by moving the motor shaft 310 along the direction of departing from the driven wheel 200.

[0050] This embodiment provides a transmission mechanism. The fixed bracket 100 is used to support and connect the driven wheel 200, the motor 300, the driving wheel 400, the transmission belt 500, etc. By fixedly connecting the driving wheel 400 to the motor shaft 310, the driving wheel 400 is driven to rotate by the motor 300. The driven wheel 200 is connected to the fixed bracket 100, so that the transmission belt 500 tensioned between the driven wheel 200 and the driving wheel 400 moves relative to the fixed bracket 100 under the drive of the driven wheel 200, thereby realizing the transmission function. In this technical solution, two fixing holes 120 are provided on the fixed bracket 100 to facilitate the first fastener and the second fastener to pass through the two fixing holes 120 respectively to connect the motor base 320 to the fixed bracket 100, so that the motor base 320 can be fixed relative to the fixed bracket 100, thus ensuring the normal operation of the transmission mechanism. An installation opening 110 is provided on the fixed bracket 100 to facilitate the motor shaft 310 of the motor 300 to pass through, so as to facilitate the connection with the driving wheel 400. The motor base 320 is arranged in a form that can rotate relative to the fixed bracket 100 with the first fastener 601 passing through one of the fixing holes 120 as the rotation axis. When installing the belt, by rotating the motor base 320, the motor shaft 310 moves a preset distance in the direction close to the driven wheel 200, so as to reduce the distance between the driven wheel 200 and the driving wheel 400, and then it is convenient to put the transmission belt 500 on between the driven wheel 200 and the driving wheel 400. Then, by reversely rotating the motor base 320, the motor base 320 drives the motor shaft 310 to move in the direction away from the driven wheel 200, so that the transmission belt 500 is tensioned between the driving wheel 400 and the driven wheel 200. In this way, it is beneficial to install the transmission belt 500 and improve the installation and replacement efficiency of the transmission belt 500.

[0051] Specifically, the fixed bracket 100 is a plate-like structure. The driving wheel 400 and the driven wheel 200 are arranged at intervals, and the transmission belt 500 is a belt. Convex teeth extending along the respective axis directions are provided on the outer peripheral surfaces of the driving wheel 400 and the driven wheel 200, and tooth grooves meshing with the convex teeth are provided on the inner surface of the belt. In this way, when the belt is tensioned between the driving wheel 400 and the driven wheel 200, power transmission can be realized through the mutual meshing of the convex teeth and the tooth grooves.

[0052] It should be noted that the transmission mechanism provided in this embodiment is used in products that need to rotate. For example, in this embodiment, the transmission mechanism is used to drive the rotation of a pan-tilt camera. Specifically, the pan-tilt camera is connected to the driven wheel 200, the driving wheel 400 drives the transmission belt 500 to move, the transmission belt 500 drives the driven wheel 200 to rotate, so that the driven wheel 200 drives the pan-tilt camera to rotate.

[0053] Such as Figures 1 to 4As shown, in one embodiment, two fixing holes 120 are defined as a first fixing hole 121 for a first fastener 601 to pass through and a second fixing hole 122 for a second fastener 602 to pass through; a guiding groove 130 is formed on the fixing bracket 100, and the guiding groove 130 is arranged between the second fixing hole 122 and the mounting opening 110. The guiding groove 130 is configured as an arc concentric with the first fixing hole 121. The guiding groove 130 is for a third fastener 603 to pass through, so as to guide the rotation of the motor base 320 relative to the fixing bracket 100.

[0054] By providing the guiding groove 130 on the fixing bracket 100 as described above for the third fastener 603 to pass through, it is convenient to guide the rotation of the motor base 320 relative to the fixing bracket 100, so that the rotation of the motor base 320 relative to the fixing bracket 100 is more stable and reliable.

[0055] In this embodiment, the diameter of the mounting opening 110 is larger than the diameter of the motor shaft 310, so that the motor shaft 310 has a moving space within the mounting opening 110. Specifically, when the motor base 320 rotates relative to the fixing bracket 100 around the first fastener 601, the motor shaft 310 can move within the mounting opening 110, so as to realize that the motor shaft 310 can move in a direction closer to or farther from the driven wheel 200. It can be understood that the diameter of the mounting opening 110 should be smaller than the size of the motor base 320, so as to prevent the motor base 320 from passing through the mounting opening 110, and further ensure that the driving wheel 400 and the motor base 320 are respectively located on opposite sides of the fixing bracket 100. There is no limitation on the specific structure of the fixing hole 120, which can be a through hole or a threaded hole, depending on the specific fastening method.

[0056] As Figures 1 to 4 As shown, in one embodiment, the third fastener 603 is configured as a stepped bolt. The smooth shaft section of the stepped bolt is arranged in the guiding groove 130 and passes through a first mounting hole 3211 formed in the motor base 320, and the threaded section of the stepped bolt is used for fastening with a nut.

[0057] Setting the third fastener 603 in the form of a stepped bolt makes it convenient to cooperate with the groove wall of the guiding groove 130 when the smooth shaft section of the stepped bolt is arranged in the guiding groove 130, so as to realize the guiding of the rotation of the motor base 320 relative to the fixing bracket 100. Moreover, by the cooperation of the smooth shaft section and the guiding groove 130, the frictional resistance between the two can be reduced, so that the guiding is smoother. And a first mounting hole 3211 corresponding to the guiding groove 130 is provided on the motor base 320, so as to facilitate the stepped bolt to pass through the first mounting hole 3211, so that the motor base 320 can be driven to move relative to the fixing bracket 100 along the guiding groove 130 while the stepped bolt moves relative to the guiding groove 130.

[0058] It will be appreciated that the outer surface of the optical axis section in the stepped bolt is a smooth cylindrical structure, while the threaded section is provided with external threads. In this embodiment, a stepped bolt can be installed in the first fixing hole 121 and the guide groove 130, while a conventional bolt can be installed in the second fixing hole 122. This configuration is because the stepped bolt in the first fixing hole 121 serves as a rotating axis. When the motor base 320 rotates relative to the fixed bracket 100, the stepped bolt rotates relative to the first fixing hole 121. This reduces friction between the optical axis section and the wall of the first fixing hole 121, preventing damage to the optical axis section and the wall, thereby ensuring the service life of the fastener 600 and the fixed bracket 100. The first mounting hole 3211 is a through hole.

[0059] like Figures 1 to 4 As shown, in one embodiment, the motor base 320 has two lugs 321 arranged along the radial direction of the motor shaft 310 on the side facing the fixing bracket 100. A first mounting hole 3211 is provided on one lug 321, and a second mounting hole 3212 corresponding to the first fixing hole 121 is configured on the other lug 321. By providing the above-mentioned lugs 321 on the motor base 320 and providing the second mounting holes 3212 on the lugs 321, the fixed connection between the motor base 320 and the fixing bracket 100 is ensured without damaging other structures of the motor 300. The second mounting holes 3212 can be configured as threaded holes or through holes.

[0060] like Figures 1 to 3 As shown, in one embodiment, the transmission mechanism further includes a locking plate 700, which is disposed on a side of the fixing bracket 100 facing away from the motor base 320. The locking plate 700 is provided with an opening corresponding to the first fixing hole 121 for the first fastener 601 to pass through to fix the motor base 320. By providing the locking plate 700 on the side of the fixing bracket 100 facing away from the motor base 320, the reliability of the fixed connection between the motor base 320 and the fixing bracket 100 is ensured.

[0061] In this embodiment, the locking piece 700 is a sheet-like structure, and the locking piece 700 is generally arc-shaped. This ensures that the locking piece 700 can be smaller while ensuring the fixing effect on the motor base 320, thereby saving space and reducing production costs. The opening provided in the locking piece 700 corresponding to the first fixing hole 121 is a through hole.

[0062] like Figures 1 to 3As shown, in one embodiment, a first notch 710 is provided at one side edge of the locking piece 700 facing the motor 300. The first notch 710 corresponds to the mounting opening 110 to avoid the motor shaft 310. By providing the first notch 710 corresponding to the mounting opening 110 on the locking piece 700, the motor shaft 310 can be avoided through the first notch 710, thereby preventing interference between the locking piece 700 and the motor shaft 310. At one side edge of the locking piece 700 facing the motor 300, a second notch 720 corresponding to the guiding groove 130 is provided. The second notch 720 is used for the third fastener 603 to pass through. By providing the second notch 720 corresponding to the guiding groove 130 on the locking piece 700, on the one hand, it is convenient for the third fastener 603 to pass through the second notch 720 and the guiding groove 130 to guide the rotation of the motor base 320 relative to the fixed bracket 100; on the other hand, by setting the second notch 720 in the form of a notch, the requirement for the position offset and alignment accuracy between the second notch 720 and the guiding groove 130 during the movement of the third fastener 603 along the guiding groove 130 relative to the fixed bracket 100 is greatly reduced, so that the dimensional accuracy of the guiding groove 130 and the second notch 720 can be reduced, thereby reducing the production cost.

[0063] In this embodiment, both the first notch 710 and the second notch 720 are arc-shaped notches. The opening radius of the first notch 710 can be the same as the radius of the mounting opening 110, or can be set to be slightly larger than the radius of the mounting opening 110. For the radius of the second notch 720, it depends on the size of the corresponding third fastener 603.

[0064] As Figures 1 to 3 As shown, in one embodiment, the locking piece 700 is further provided with a folding portion 730 extending in a direction away from the fixed bracket 100. The folding portion 730 is provided at the end of the locking piece 700 close to the guiding groove 130. By providing the folding portion 730 on the locking piece 700 as above, when installing the transmission belt 500, the force can be applied to the folding portion 730 to drag the motor base 320 to move relative to the fixed bracket 100, thereby improving the convenience during the installation of the transmission belt 500.

[0065] The folding portion 730 is provided at the end of the locking piece 700 at the end far from the rotation center. In this way, when installing the belt, the folding portion 730 can be dragged, so that one end of the locking piece 700 rotates around the first fastener 601 in the first fixing hole 121, thereby driving the motor base 320 to rotate relative to the fixed bracket 100.

[0066] As Figures 1 to 3As shown, in one embodiment, the transmission mechanism further includes a mounting shaft 800, which is fixedly connected to the fixed bracket 100, and the driven wheel 200 is rotatably connected to the mounting shaft 800. By fixedly connecting the mounting shaft 800 to the fixed bracket 100, the driven wheel 200 is rotatably connected to the mounting shaft 800, thereby enabling the driven wheel 200 to rotate relative to the fixed bracket 100.

[0067] Specifically, a bearing is provided between the driven wheel 200 and the mounting shaft 800 , thereby enabling the driven wheel 200 to rotate around the mounting shaft 800 .

[0068] like Figures 1 to 3 As shown in one embodiment, flanges 210 extending in the radial direction are provided at both ends of the driven wheel 200 and the driving wheel 400 along their own axial directions to block the transmission belt 500. By providing the flanges 210 extending in the radial direction at both ends of the driven wheel 200 and the driving wheel 400 along their own axial directions, the transmission belt 500 is blocked by the flanges 210, thereby preventing the transmission belt 500 from falling off.

[0069] Specifically, flanges 210 are provided at both ends of the driven pulley 200 and the driving pulley 400 along the axial direction, so that an annular groove is formed between the two flanges 210 , and the belt is provided in the annular groove, so that the belt is limited by the flanges 210 .

[0070] An embodiment of the present invention further provides a pan-tilt camera, which includes the above transmission mechanism.

[0071] Reference Figures 1 to 4 , the installation method of the transmission mechanism provided by the utility model is as follows:

[0072] First, the driven wheel 200 is connected to the mounting shaft fixed to the fixing bracket 100. Then, a stepped bolt, also known as the first fastener 601, is passed through the opening on the locking plate 700, the first fixing hole 121 on the fixing bracket 100, and the second mounting hole 3212 on the motor base 320 in sequence, thereby preliminarily connecting the motor base 320 to the fixing bracket 100. Then, another stepped bolt, also known as the third fastener 603, is passed through the second notch 720 on the locking plate 700, the guide groove 130 on the fixing bracket 100, and the first mounting hole 3211 on the motor base 320 in sequence. The stepped bolt is not tightened, allowing it to move along the guide groove 130, thereby allowing the motor base 320 to rotate around the stepped bolt set in the second mounting hole 3212, thereby reducing the distance between the driving wheel 400 and the driven wheel 200. When the motor base 320 is rotated until the distance between the driving pulley 400 and the driven pulley 200 is minimized, the transmission belt 500 is placed between the master and slave pulleys 400 and the driven pulley 200. After the transmission belt 500 is installed, the locking plate 700 is pushed, thereby pushing the motor base 320 and the driving pulley 400 to the predetermined position. At this point, the transmission belt 500 will gradually tighten, generating a preload force. Finally, all the step bolts are tightened, and the fastening bolt, i.e., the second fastener 602, is inserted through the opening in the locking plate 700 and the second fixing hole 122 in the fixing bracket 100. The locking plate is then locked to limit the step bolt in the guide slot 130 and prevent the step bolt from moving along the guide slot 130.

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A transmission mechanism, characterized in that, The transmission mechanism comprises: A fixing bracket, wherein the fixing bracket is provided with a mounting opening and two fixing holes, wherein the two fixing holes are respectively provided on opposite sides of the mounting opening along the radial direction of the mounting opening; A driven wheel connected to the fixed bracket; a motor, wherein the motor seat of the motor is arranged on a side of the fixing bracket away from the driven wheel, and the motor shaft of the motor is passed through the mounting opening; A driving wheel connected to the motor shaft; A transmission belt is stretched between the driven wheel and the driving wheel; In which, the motor seat can rotate relative to the installation port in a direction close to or away from the driven wheel with the first fastener inserted into one of the fixing holes as the rotation axis, and the transmission belt is configured to be pre-installed between the driven wheel and the driving wheel by moving the motor shaft a preset distance in a direction close to the driven wheel, and to tighten the transmission belt by moving the motor shaft in a direction away from the driven wheel.

2. The transmission mechanism according to claim 1, wherein The two fixing holes are defined as a first fixing hole for the first fastener to pass through and a second fixing hole for the second fastener to pass through; the fixing bracket is constructed with: A guide groove is provided between the second fixing hole and the mounting opening. The guide groove is constructed as an arc concentric with the first fixing hole. The guide groove is for the third fastener to pass through and serves as a rotation guide for the motor base relative to the fixing bracket.

3. The transmission mechanism according to claim 2, characterized in that, The third fastener is constructed as a step bolt, the optical axis section of the step bolt is arranged in the guide groove and passes through the first mounting hole opened on the motor base, and the threaded section of the step bolt is used for fastening with a nut.

4. The transmission mechanism according to claim 3, characterized in that, The motor base has two ear plates arranged along the radial direction of the motor shaft on one side facing the fixing bracket, the first mounting hole is provided on one of the ear plates, and the second mounting hole corresponding to the first fixing hole is constructed on the other ear plate.

5. The transmission mechanism according to claim 2, characterized in that, The transmission mechanism further comprises: A locking plate is provided on a side of the fixing bracket away from the motor base. The locking plate is provided with openings corresponding to the first fixing hole and the second fixing hole for the first fastener and the second fastener to pass through to fix the motor base.

6. The transmission mechanism according to claim 5, characterized in that, A first notch is provided on one side edge of the locking piece facing the motor, and the first notch corresponds to the mounting opening to avoid the motor shaft.

7. The transmission mechanism according to claim 5, characterized in that, A second notch corresponding to the guide groove is provided on one side edge of the locking piece facing the motor, and the second notch is used for the third fastener to pass through.

8. The transmission mechanism according to claim 5, wherein The locking piece is further provided with a folding portion extending in a direction away from the fixing bracket, and the folding portion is provided at an end portion of the locking piece close to the guide groove.

9. The transmission mechanism according to any one of claims 1-8, characterized in that, The transmission mechanism further includes a mounting shaft, the mounting shaft is fixedly connected to the fixing bracket, and the driven wheel is rotatably connected to the mounting shaft.

10. The transmission mechanism according to any one of claims 1-8, characterized in that, Both ends of the driven wheel and the driving wheel along their own axial directions are provided with flanges extending in the radial direction to block the transmission belt.

11. A pan-tilt camera, characterized in that, It comprises the transmission mechanism according to any one of claims 1-10.

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