Worm and gear transmission device and pan-tilt camera

Abstract

The utility model relates to the technical field of transmission devices, and provides a worm and gear transmission device and a pan-tilt camera, the worm and gear transmission device comprises a shell, a worm gear, a worm and a circulating pipe, and an accommodating cavity is formed in the shell; the worm gear and the worm are both arranged in the containing cavity and are both in running fit with the shell. Helical teeth and helical blades are arranged on the worm, the helical teeth are meshed with the worm gear, and the helical blades are arranged on at least one side of the helical teeth; one end of the circulating pipe is connected to one side of the shell, the other end of the circulating pipe is connected to the other side of the shell, a circulating flow channel is formed in the circulating pipe, and the circulating flow channel communicates with the containing cavity; the containing cavity and the circulating flow channel are both filled with lubricating agents, and when the worm drives the spiral blades to rotate synchronously, the lubricating agents are pushed to circularly flow in the containing cavity and the circulating flow channel. The friction coefficient between the tooth surfaces of the worm gear and the worm can be continuously reduced, the friction loss is reduced, the service life of the worm gear and the worm is prolonged, and the maintenance cost is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission device technical field especially relates to a worm gear transmission device and cloud platform camera. BACKGROUND

[0002] Cloud platform camera, such as heavy load cloud platform, is widely used in large-scale security monitoring and industrial automation equipment fields. The above application scenarios generally exist technical challenges such as harsh environmental conditions, large load torque, high positioning accuracy requirements, which puts forward strict requirements on the bearing capacity, running stability and environmental adaptability of the cloud platform transmission structure.

[0003] Worm gear transmission mechanism is widely used in the vertical transmission structure of heavy load cloud platform due to its unique self-locking characteristics, high reduction ratio advantage and compact mechanical structure, which can effectively prevent the reverse slip of heavy load cloud platform in the vertical direction due to gravity, and help to realize accurate torque amplification and position control. However, the sliding friction between the meshing tooth surfaces of worm gear transmission mechanism will cause the transmission efficiency to decrease significantly, and the heat accumulation caused by the severe friction will cause material thermal deformation, affecting the transmission accuracy and structural reliability. High linear speed sliding of meshing surface will accelerate tooth surface wear, especially in long-term heavy load working condition, which is easy to cause tooth distortion and even tooth failure, shortening the service life of transmission system.

[0004] To alleviate the wear problem of worm gear transmission mechanism, the related technology is to coat lubricating oil on the meshing surface of worm gear to reduce the friction coefficient. However, heavy load cloud platform is often deployed in special scenes such as border sentry, offshore island, forest fire prevention, etc. with poor traffic accessibility. Frequent lubrication and maintenance operation will greatly increase the operation and maintenance cost. INVENTION CONTENTS

[0005] The utility model provides a kind of worm gear transmission device and cloud platform camera to solve the above technical defects in prior art, which can continuously reduce the friction coefficient between worm gear tooth surfaces, reduce friction loss, thereby prolong the service life of worm gear and worm, significantly reduce maintenance cost.

[0006] The first aspect of the utility model provides a kind of worm gear transmission device, comprising:

[0007] Shell, internally structured into containing cavity;

[0008] Worm gear, is located in the containing cavity, and is rotationally matched with the shell;

[0009] Worm, is located in the containing cavity, and is rotationally matched with the shell;Spiral tooth and helical blade are provided on the worm, the spiral tooth is mutually engaged with the worm gear, and the helical blade is provided on at least one side of the spiral tooth;

[0010] A circulation pipe is connected to one side of the housing at one end and to the other side of the housing at the other end, and a circulation flow channel is formed inside the circulation pipe, which is in communication with the accommodating cavity;

[0011] The accommodating cavity and the circulation flow channel are filled with lubricant, and the helical blade pushes the lubricant to circulate in the accommodating cavity and the circulation flow channel when the helical blade is driven to rotate synchronously by the worm.

[0012] The worm gear transmission device further comprises:

[0013] An alternating magnetic field generator is arranged on the inner wall of the accommodating cavity and located at the position where the helical tooth and the worm gear are in meshing engagement, and the alternating magnetic field generator is used to generate an alternating magnetic field.

[0014] The lubricant comprises lubricating grease doped with nano-magnetic particles, which is suitable for being heated under the action of the alternating magnetic field.

[0015] The worm gear transmission device further comprises:

[0016] A temperature sensor is arranged on the inner wall of the accommodating cavity and used to detect the temperature in the accommodating cavity.

[0017] A control unit is electrically connected to the temperature sensor and the alternating magnetic field generator, respectively, and used to receive the temperature information detected by the temperature sensor and control the operation of the alternating magnetic field generator based on the temperature information.

[0018] The worm gear transmission device further comprises:

[0019] The worm gear transmission device further comprises:

[0020] The worm gear transmission device further comprises:

[0021] The worm gear transmission device further comprises:

[0022] The worm gear transmission device further comprises:

[0023] The worm gear transmission device further comprises:

[0024] A first sub- containing cavity for containing the worm wheel;

[0025] A second sub- containing cavity in communication with the first sub- containing cavity, the second sub- containing cavity for containing the worm;

[0026] Wherein, the circulation flow channel is in communication with the second sub- containing cavity.

[0027] The second aspect of the utility model provides a cloud platform camera, comprising:

[0028] The base assembly is internally provided with a driving part;

[0029] The camera main body is arranged in the base assembly;

[0030] And the worm and worm gear drive device of any one described, worm and worm gear drive device is arranged in the inside of base assembly, and with driving part transmission cooperation, be used for driving camera main body rotation.

[0031] According to the cloud platform camera provided by the utility model, the base assembly comprises:

[0032] The base main body;

[0033] The mounting main body is arranged in the base main body;

[0034] Wherein, the driving part and the worm and worm gear drive device are arranged in the inside of the mounting main body, and the driving part is in transmission cooperation with the worm and worm gear drive device through the transmission part.

[0035] The worm and worm gear drive device provided by the utility model seals the worm wheel and the worm in the containing cavity of the shell body, connects the circulation pipe on both sides of the shell body, sets up the spiral tooth and the spiral blade on the worm, the spiral tooth is mutually engaged with the worm wheel, and the spiral blade is arranged on at least one side of the spiral tooth.

[0036] After the worm and worm gear drive device is assembled, the containing cavity and the circulation flow channel are filled with appropriate lubricant.When the power source drives the worm to rotate, the spiral tooth on the worm is engaged with the tooth surface of the worm wheel to realize power transmission.At the same time, the spiral blade on the worm rotates synchronously with the worm, and the rotation of the spiral blade is like a small propeller, which pushes the lubricant to flow in the containing cavity.Because the circulation flow channel is in communication with the containing cavity, the lubricant in the containing cavity will enter the circulation flow channel of the circulation pipe under the pushing of the spiral blade, and then flow back to the containing cavity from the other end of the circulation pipe, forming a complete circulation flow path.

[0037] Due to the lubricant can be circulated in the containing cavity and the circulation flow channel, the tooth surfaces of the worm wheel and the worm can continuously be supplied with fresh and sufficient lubricant, compared with the traditional static lubrication mode, the circulating lubrication mode can better reduce the friction coefficient between the tooth surfaces, reduce the friction loss, thereby effectively prolonging the service life of the worm wheel and the worm, significantly reducing the maintenance frequency and the maintenance cost, especially for the worm wheel and worm transmission device applied in the heavy load holder such as border defense, island, forest and the like, the advantage of reducing the maintenance cost is more obvious.

[0038] In addition, the circulating lubrication reduces the friction between the tooth surfaces, reduces the energy loss, thereby improving the transmission efficiency and ensuring that the worm wheel and worm transmission device is more reliable in transmission.

[0039] The holder camera provided by the utility model has all the advantages of the worm wheel and worm transmission device. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0041] Figure 1 It is the structure schematic view of the worm wheel and worm transmission device provided by the embodiment of the utility model.

[0042] Figure 2 It is the sectional view of the worm wheel and worm transmission device provided by the embodiment of the utility model.

[0043] Figure 3 It is the local structure schematic view of the worm wheel and worm transmission device provided by the embodiment of the utility model.

[0044] Figure 4 It is the lateral sectional view of the worm wheel and worm transmission device provided by the embodiment of the utility model.

[0045] Figure 5 It is the control block diagram of the worm wheel and worm transmission device provided by the embodiment of the utility model.

[0046] Figure 6 It is the perspective view of the holder camera provided by the embodiment of the utility model.

[0047] Figure 7 It is Figure 6 The local perspective view of the holder camera shown in the figure.

[0048] Reference signs:

[0049] 100. Worm gear;

[0050] 10. Housing; 11. Accommodation cavity; 111. First sub-accommodation cavity; 112. Second sub-accommodation cavity; 20. Worm; 30. Worm gear; 31. Spiral tooth; 32. Spiral blade; 40. Circulation pipe; 41. Circulation runner; 42. Radiating fin; 50. Alternating magnetic field generator; 60. Temperature sensor; 70. Control unit;

[0051] 200. Base assembly; 210. Base body; 220. Mounting body;

[0052] 300. Camera body; 400. Driving member; 500. Transmission component. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the present application.

[0054] In the description of the embodiments of the present application, it should be noted that unless explicitly defined and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0055] In the embodiments of the present application, unless explicitly defined and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0056] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0057] Figure 1 It is the structural schematic diagram of the worm gear drive device provided by the utility model embodiment. Figure 2 It is the sectional view of the worm gear drive device provided by the utility model embodiment. Figure 3 It is the local structural schematic diagram of the worm gear drive device provided by the utility model embodiment.

[0058] Referring to Figures 1 to 3 The utility model embodiment provides a worm gear drive device 100 can be applied to the electronic equipment such as cloud platform camera, ball machine, this worm gear drive device 100 includes shell 10, worm wheel 20, worm 30 and circulation pipe 40.

[0059] Shell 10 can adopt high-strength aluminum alloy material to be made, the shape of shell 10 can be set according to the overall shape of worm wheel 20 and worm 30.The internal structure of shell 10 is made into containing cavity 11, and the shape of containing cavity 11 is adapted to the overall shape of worm wheel 20 and worm 30.

[0060] Worm wheel 20 and worm 30 are all arranged in containing cavity 11, that is, shell 10 is wrapped and arranged on the outside of worm wheel 20 and worm 30.Worm wheel 20 is connected with the support shaft of the following camera main body 300, and the support shaft is rotatably matched with shell 10 through a bearing;worm 30 is rotatably matched with shell 10 through a bearing.

[0061] Spiral tooth 31 and spiral blade 32 are arranged on worm 30, and the main part of worm 30, spiral blade 32 and spiral tooth 31 can be integrally formed.The helix angle of spiral tooth 31 can be set according to the actual transmission ratio requirement, and spiral tooth 31 is engaged with worm wheel 20, and spiral blade 32 is arranged on at least one side of spiral tooth 31, that is, spiral blade 32 can be arranged on any one side of spiral tooth 31, and spiral blade 32 can also be arranged on both sides of spiral tooth 31.

[0062] The circulating pipe 40 can be made of stainless steel pipe, and the pipe diameter of the circulating pipe 40 is set according to the flow requirement of the lubricant. The connection between the circulating pipe 40 and the shell 10 is flange connection with good sealing performance, and a rubber sealing ring such as a fluorine rubber sealing ring is installed at the connection to prevent leakage of the lubricant.

[0063] One end of the circulating pipe 40 is connected to one side of the shell 10, and the other end is connected to the other side of the shell 10, and the circulating flow channel 41 is formed in the circulating pipe 40.

[0064] After the worm gear transmission device 100 is assembled, the accommodating cavity 11 and the circulating flow channel 41 are filled with an appropriate amount of lubricant. When the power source drives the worm 30 to rotate, the helical teeth 31 on the worm 30 mesh with the tooth surface of the worm gear 20 to achieve power transmission. At the same time, the helical blade 32 on the worm 30 rotates synchronously with the worm 30, and the rotation of the helical blade 32 is like a small propeller to push the lubricant to flow in the accommodating cavity 11. Since the circulating flow channel 41 is in communication with the accommodating cavity 11, under the pushing of the helical blade 32, the lubricant in the accommodating cavity 11 will enter the circulating flow channel 41 of the circulating pipe 40, and then flow back to the accommodating cavity 11 from the other end of the circulating pipe 40, forming a complete circulating flow path.

[0065] Under the low-speed heavy-load working condition, due to the pushing action of the helical blade 32, even if the lubricant is subjected to a larger pressure at the meshing position of the tooth surface, it can be supplemented and circulated in time, so that the tooth surface is always in a good lubrication state.

[0066] Under the high-speed working condition, the helical blade 32 can effectively stir and push the lubricant in the accommodating cavity 11, prevent the lubricant from being locally gathered or lost due to centrifugal force and other factors, and ensure the stable lubrication of the entire transmission device.

[0067] It can be understood that the worm gear transmission device 100 provided by the embodiment of the utility model, by sealingly installing the worm gear 20 and the worm 30 in the accommodating cavity 11 of the shell 10, connecting the circulating pipe 40 on both sides of the shell 10, and arranging the helical teeth 31 and the helical blade 32 on the worm 30, the helical teeth 31 and the worm gear 20 are meshed with each other, and the helical blade 32 is arranged on at least one side of the helical teeth 31.

[0068] When the power source drives the worm 30 to rotate, the helical teeth 31 on the worm 30 mesh with the tooth surface of the worm wheel 20 to realize power transmission. At the same time, the helical blades 32 on the worm 30 rotate synchronously with the worm 30, and the helical blades 32 push the lubricant to flow. Since the circulation flow channel 41 is communicated with the containing cavity 11, under the pushing of the helical blades 32, the lubricant in the containing cavity 11 enters the circulation flow channel 41 of the circulation pipe 40, and then flows back to the containing cavity 11 from the other end of the circulation pipe 40, to form a complete circulation flow path.

[0069] Since the lubricant can circulate and flow in the containing cavity 11 and the circulation flow channel 41, the tooth surfaces of the worm wheel 20 and the worm 30 can continuously be supplied with fresh and sufficient lubricant. Compared with the traditional static lubrication mode, the circulation lubrication mode can better reduce the friction coefficient between the tooth surfaces, reduce the friction loss, thereby effectively prolonging the service life of the worm wheel 20 and the worm 30, and significantly reducing the maintenance frequency and maintenance cost. The advantage of reducing the maintenance cost is more obvious, especially for the worm and worm gear transmission device 100 applied in a heavy-load holder such as a border defense, an island, a forest and the like.

[0070] In addition, the circulation lubrication reduces the friction between the tooth surfaces and reduces the energy loss, thereby improving the transmission efficiency and ensuring that the transmission of the worm and worm gear transmission device 100 is more reliable.

[0071] Figure 4 is a lateral sectional view of the worm and worm gear transmission device 100 provided by an embodiment of the utility model. Figure 5 is a control block diagram of the worm and worm gear transmission device 100 provided by an embodiment of the utility model.

[0072] Referring to Figure 4 and Figure 5 In some embodiments of the utility model, the worm and worm gear transmission device 100 further comprises an alternating magnetic field generator 50, which can adopt the form of an electromagnetic coil. For example, the coil is wound by high-temperature-resistant enameled copper wire, and the wire diameter is selected according to the required magnetic field strength and power requirement. The alternating magnetic field generator 50 can be arranged on the inner wall of the containing cavity 11 through a bolt or the like structure and located at the position where the helical teeth 31 and the worm wheel 20 mesh with each other, so as to ensure that the alternating magnetic field generated by the alternating magnetic field generator 50 can effectively act on the lubricant in the meshing area.

[0073] The lubricant comprises a lubricating grease doped with nano magnetic particles, the nano magnetic particles can be selected from ferric oxide nano particles, have good magnetic response capability, and have good chemical stability. The lubricating grease can be a lithium-based lubricating grease with mineral oil as base oil, and the viscosity of the base oil is selected according to the working condition of the worm gear transmission device 100. A certain proportion of ferric oxide nano particles is added to the lithium-based lubricating grease, and the nano particles are uniformly dispersed in the lubricating grease through a mixing process such as high-speed stirring.

[0074] Due to the fact that the nano magnetic particles are doped in the lubricant, the nano magnetic particles can be rapidly heated under the action of the alternating magnetic field to achieve the purpose of temperature regulation. Moreover, due to the fact that the nano magnetic particles are doped in the lubricant, the heat conduction capacity of the lubricating grease can be improved.

[0075] When the alternating magnetic field generator 50 works, an alternating magnetic field is generated, and under the action of the alternating magnetic field, the nano magnetic particles are magnetized and vibrate. With the magnetization and vibration of the nano magnetic particles, friction occurs inside the lubricating grease, so that the temperature of the lubricating grease is raised, that is, the temperature of the lubricating grease in the meshing area is raised, the viscosity of the lubricating grease is reduced, and the lubricating grease is more easily filled between the meshing surfaces, so that better lubrication effect can be achieved, and the transmission efficiency can be effectively improved. At the same time, the alternating magnetic field continuously acts, so that the temperature raising effect of the lubricating grease and the good fluidity of the lubricating grease are ensured.

[0076] For example, in a low-temperature environment, the viscosity of the traditional lubricating grease increases, which causes the worm gear 20 and the worm 30 to be difficult to start. However, the lubricating grease doped with nano magnetic particles and subjected to the action of the alternating magnetic field can reduce the viscosity through magnetic field heating when starting, so that the starting performance of the transmission device in a low-temperature environment is improved. Moreover, due to the fact that the alternating magnetic field raises the temperature and reduces the viscosity of the lubricating grease, the lubricating grease can be more rapidly and fully filled between the meshing surfaces of the worm gear 20 and the worm 30, so that the friction and wear between the meshing surfaces are reduced, and the service life of the worm gear transmission device 100 is prolonged.

[0077] Continuously referring to Figure 4 and Figure 5 In some embodiments of the utility model, the worm gear transmission device 100 further comprises a temperature sensor 60 and a control unit 70, the temperature sensor 60 is fixed to the inner wall of the containing cavity 11 through a screw or the like, and is used for detecting the temperature in the containing cavity 11. The control unit 70 is electrically connected with the temperature sensor 60 and the alternating magnetic field generator 50 respectively, is used for receiving the temperature information detected by the temperature sensor 60, and controls the alternating magnetic field generator 50 to work based on the temperature information.

[0078] The temperature sensor 60 can be a thermocouple temperature sensor, which can meet the measurement requirements of the worm gear transmission device 100 under different temperature conditions in the accommodating cavity 11. The control unit 70 can be a circuit system with a microcontroller (MCU) as the core. The connection between the control unit 70 and the temperature sensor 60 adopts an analog input interface. The analog voltage signal output by the temperature sensor 60 is converted into a digital signal through an analog-to-digital conversion circuit, so that the microcontroller can read the temperature value. The connection between the control unit 70 and the alternating magnetic field generator 50 is through a digital output interface. According to the control logic, the corresponding control signal is output to adjust the working state of the alternating magnetic field generator 50.

[0079] The temperature threshold can be set before the gimbal camera using the worm gear transmission device 100 is used. For example, a lower limit temperature value T1 and an upper limit temperature value T2 are set.

[0080] When the gimbal camera is powered on and the worm gear transmission device 100 starts to work, the temperature sensor 60 monitors the temperature in the accommodating cavity 11 in real time. For example, when the worm gear transmission device 100 just starts to run, the temperature in the accommodating cavity 11 is low, and the temperature sensor 60 sends the first temperature value (such as 15°C) detected to the control unit 70.

[0081] After the control unit 70 receives the temperature value, it compares it with the set temperature threshold. When the first temperature value is lower than the lower limit temperature value T1, the control unit 70 sends a control signal to the alternating magnetic field generator 50 according to the preset control logic, to increase the magnetic field strength or frequency of the alternating magnetic field generator 50. After receiving the control signal, the alternating magnetic field generator 50 adjusts its working state to generate a stronger or higher frequency alternating magnetic field. Under the action of the alternating magnetic field, the lubricating grease doped with nano-magnetic particles starts to heat up rapidly, reducing the viscosity and thus improving the lubrication effect.

[0082] As the worm gear transmission device 100 continues to run, the temperature in the accommodating cavity 11 gradually rises. When the temperature sensor 60 detects a second temperature value (such as 30°C), if the second temperature is between T1 and T2, the control unit 70 maintains the current working state of the alternating magnetic field generator 50. In some special working conditions, the temperature in the accommodating cavity 11 rises, and the temperature sensor 60 detects a third temperature value that exceeds the upper limit temperature value T2 (50°C). The temperature sensor 60 sends the third temperature value to the control unit 70. The control unit 70 then sends a control signal to the alternating magnetic field generator 50 to reduce its working strength or frequency, so that the heating speed of the lubricating grease slows down or stops heating, preventing the lubricating grease from deteriorating due to overheating.

[0083] It can be understood that the worm gear transmission device 100 provided by the embodiment of the utility model can accurately control the temperature in the containing cavity 11 through the cooperative work of the temperature sensor 60, the alternating magnetic field generator 50 and the control unit 70. The temperature of the lubricating grease is always kept in a suitable range, avoiding the problems of viscosity increase, poor lubrication caused by too low temperature and lubricating grease deterioration caused by too high temperature.

[0084] Whether in the rapid heating stage after low-temperature starting or in the high-temperature control stage after long-time running, the worm gear transmission device 100 can adaptively adjust the working state of the alternating magnetic field generator 50, ensuring that the transmission device has good lubrication and stable performance under different working conditions. Temperature control helps to maintain the performance of the lubricating grease, thereby reducing the wear of the worm wheel 20 and the worm 30. Since the lubrication effect is always in good condition, the situation of overheating and deterioration of the lubricating grease is avoided, prolonging the service life of the worm gear transmission device 100.

[0085] Continuing to refer to Figure 1 and Figure 2 In some embodiments of the utility model, the outer wall surface of the circulating pipe 40 is arrayed or spirally provided with heat dissipation fins 42.

[0086] The heat dissipation fins 42 can be provided in the form of rectangular fins, circular fins or spiral structures, and the heat dissipation fins 42 can be connected to the outer wall surface of the circulating pipe 40 by welding.

[0087] When the worm gear transmission device 100 is running, the meshing area will heat up under the action of friction, and the temperature of the lubricant will rise. In the circulating pipe 40, the lubricant transfers heat to the inner wall of the circulating pipe 40, and the metal wall surface of the circulating pipe 40 is a good conductor of heat, which will quickly conduct from the inner wall to the outer wall. Since the heat dissipation fins 42 are tightly connected to the outer wall of the circulating pipe 40, the heat is further conducted to the heat dissipation fins 42, and the heat is dissipated from the heat dissipation fins 42 to the surrounding air.

[0088] Since the heat dissipation fins 42 have a large surface area, the contact area with the air is increased, and the heat is transferred to the air by convection and radiation, which can accelerate the dissipation of heat and gradually reduce the temperature of the heat dissipation fins 42, while also reducing the temperature of the lubricant in the circulating pipe 40.

[0089] It can be understood that the embodiment of the utility model can maintain the viscosity, lubrication performance and other characteristics of the lubricant by effectively reducing the temperature of the lubricant. Stable lubricant performance can reduce the friction and wear between the worm wheel 20 and the worm 30, prolonging the service life of the transmission device.

[0090] For example, in some high temperature working conditions, such as the long time high load operation of the worm and gear transmission device 100, the heat dissipation fins 42 can timely dissipate the heat in the circulating pipe 40, ensure the normal operation of the transmission device, and improve the adaptability of the transmission device to high temperature working conditions.

[0091] With reference to the accompanying drawings Figure 1 and Figure 2 In some embodiments of the utility model, the heat dissipation fins 42 can be arranged as a plurality of rectangular heat dissipation fins 42, and the plurality of heat dissipation fins 42 are arranged in an axial array along the circulating pipe 40. The axial array arrangement of the plurality of heat dissipation fins 42 along the circulating pipe 40 can increase the contact area of the circulating pipe 40 with air, thereby improving the heat dissipation efficiency.

[0092] With reference to the accompanying drawings Figure 3 In some embodiments of the utility model, the rotation direction of the helical line of the spiral blade 32 is opposite to the rotation direction of the helical line of the spiral tooth 31. The reaction force of the spiral blade 32 pushing the lubricating oil can offset a part of the axial force of the worm 20 acting on the worm 30, thereby reducing the load of the thrust bearing of the worm 30, reducing the wear of the thrust bearing, and prolonging the service life of the bearing.

[0093] Further, the spiral blade 32 is arranged on both sides of the spiral tooth 31, the rotation direction of the helical line of the spiral blade 32 on both sides of the spiral tooth 31 is the same, and the rotation direction of the helical line of the spiral blade 32 on each side is opposite to the rotation direction of the helical line of the spiral tooth 31. Through a specific mechanical relationship, the axial force is compensated, so that the reaction force of the spiral blade 32 pushing the lubricating oil can offset a part of the axial force of the worm 20 acting on the worm 30, thereby reducing the load of the thrust bearing of the worm 30, reducing the wear of the thrust bearing, and prolonging the service life of the bearing.

[0094] That is, the spiral blade 32 on both sides of the spiral tooth 31 is divided into a spiral blade 32a and a spiral blade 32b, the rotation direction of the helical line of the spiral blade 32a and the spiral blade 32b is the same, and the rotation direction of the helical line of the spiral blade 32a and the spiral blade 32b is opposite to the rotation direction of the helical line of the spiral tooth 31.

[0095] With reference to the accompanying drawings Figure 1 and Figure 2 In some embodiments of the utility model, the accommodating cavity 11 includes a first sub-accommodating cavity 111 and a second sub-accommodating cavity 112. The shape of the first sub-accommodating cavity 111 is adapted to the shape of the worm 20, which can be circular. The first sub-accommodating cavity 111 is used to accommodate the worm 20.

[0096] The second sub-accommodating cavity 112 is in communication with the first sub-accommodating cavity 111, and the shape of the second sub-accommodating cavity 112 is adapted to the shape of the worm 30, which can be similar to a rectangle. The second sub-accommodating cavity 112 is used to accommodate the worm 30.

[0097] The circulation flow channel 41 is communicated with the second sub-containing cavity 112, that is, the inlet and outlet positions of the circulation pipe 40 are close to the spiral blades 32 of the front end and the rear end of the worm 30, so that the lubricant in the second sub-containing cavity 112 enters the circulation flow channel 41 of the circulation pipe 40, and then flows back to the containing cavity 11 from the other end of the circulation pipe 40, thereby forming a complete circulation flow path.

[0098] Figure 6 is a perspective view of the pan-tilt camera provided in the embodiment of the utility model. Figure 7 is Figure 6 is a partial perspective view of the pan-tilt camera shown in the figure.

[0099] Referring to Figure 6 and Figure 7 , the utility model further provides a pan-tilt camera, the pan-tilt camera includes base assembly 200, camera main body 300 and the worm and gear transmission device 100 of any one of above.

[0100] The inside of the base assembly 200 is provided with a driving part 400, and the camera main body 300 is arranged on the base assembly 200;The worm and gear transmission device 100 is arranged in the inside of the base assembly 200 and is in transmission cooperation with the driving part 400, and is used for driving the camera main body 300 to rotate.

[0101] Wherein, the driving part 400 (such as DC motor) is used as power source, is connected with the worm 30 shaft of the worm and gear transmission device 100 through transmission component 500 (such as gear transmission, belt transmission or shaft coupling), realizes the transmission of power.The worm wheel 20 is connected with the support shaft of the camera main body 300, when the worm wheel 20 rotates, can drive the camera main body 300 to rotate around the support shaft.

[0102] Further, the base assembly 200 includes base body 210 and installation body 220, and the installation body 220 is arranged on the base body 210;Wherein, the driving part 400 and the worm and gear transmission device 100 are arranged in the inside of the installation body 220, and the driving part 400 is in transmission cooperation with the worm and gear transmission device 100 through transmission component (belt).

[0103] It can be understood that the pan-tilt camera provided by the utility model has all the advantages of the above-mentioned worm and gear transmission device 100 because it includes the worm and gear transmission device 100, thereby improving the reliability of the heavy-load pan-tilt camera in high and low temperature environments and reducing the maintenance cost of the pan-tilt camera.

[0104] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A worm and gear transmission device, characterized by, The application relates to a worm gear transmission device. The application comprises: a shell, which is internally structured to form a containing cavity; a worm wheel, which is arranged in the containing cavity and rotationally cooperates with the shell; a worm, which is arranged in the containing cavity and rotationally cooperates with the shell; the worm is provided with helical teeth and helical blades; the helical teeth are in mesh with the worm wheel; the helical blades are arranged on at least one side of the helical teeth; a circulation pipe, one end of which is connected to one side of the shell, and the other end of which is connected to the other side of the shell; the circulation pipe is internally structured to form a circulation flow channel, which is in communication with the containing cavity; 2. The worm and gear transmission according to claim 1, characterized in that wherein the containing cavity and the circulation flow channel are filled with lubricant; when the worm drives the helical blades to rotate synchronously, the helical blades push the lubricant to flow in the containing cavity and the circulation flow channel. The application further comprises: an alternating magnetic field generator, which is arranged on the inner wall of the containing cavity and is located at the position where the helical teeth are in mesh with the worm wheel; the alternating magnetic field generator is used for generating an alternating magnetic field; 3. The worm and gear transmission according to claim 2, characterized in that wherein the lubricant comprises lubricating grease doped with nano-magnetic particles, which is suitable for being heated under the action of the alternating magnetic field. The application further comprises: a temperature sensor, which is arranged on the inner wall of the containing cavity and is used for detecting the temperature in the containing cavity; 4. The worm and gear drive of claim 1, wherein, a control unit, which is electrically connected with the temperature sensor and the alternating magnetic field generator respectively; the control unit is used for receiving the temperature information detected by the temperature sensor and controlling the alternating magnetic field generator to work based on the temperature information.

5. The worm and gear drive according to claim 4, characterized in that The outer wall surface of the circulation pipe is arrayed or helically provided with heat dissipation fins.

6. The worm and gear drive of claim 1, wherein, The heat dissipation fins are arranged in multiple; the multiple heat dissipation fins are arranged in an axial array along the circulation pipe.

7. The worm and gear drive according to claim 6, characterized in that The helical line of the helical blade is in the opposite direction to the helical line of the helical tooth. The helical blade is arranged on both sides of the helical tooth.

8. The worm and wheel gear according to any one of claims 1 to 7, characterized in that The helical lines of the helical blades on both sides of the helical tooth are in the same direction; the helical line of each helical blade is in the opposite direction to the helical line of the helical tooth. The containing cavity comprises: a first sub-containing cavity, which is used for containing the worm wheel; a second sub-containing cavity, which is in communication with the first sub-containing cavity and is used for containing the worm; 9. A pan-tilt camera, characterized by, wherein the circulation flow channel is in communication with the second sub-containing cavity. The application comprises: a base assembly, which is internally provided with a driving member; a camera main body, which is arranged in the base assembly; and 10. The pan-tilt camera of claim 9, wherein, the worm gear transmission device according to any one of claims 1 to 8, which is arranged in the interior of the base assembly and is in transmission cooperation with the driving member, and is used for driving the camera main body to rotate. The base assembly comprises: a base main body; a mounting main body, which is arranged in the base main body; wherein the driving member and the worm gear transmission device are both arranged in the interior of the mounting main body; the driving member is in transmission cooperation with the worm gear transmission device through a transmission component.

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