86results about How to "Constant transmission ratio" patented technology

The invention relates to a gear and a method for designing and machining the same. The gear is particularly characterized in that each of tooth crest curved surfaces and tooth root curved surfaces is a part of a convex ring surface or a concave ring surface, each of the tooth crest curved surfaces and the tooth root curved surfaces of the involute gear with the concave and convex ring surfaces is a part of a ring surface, an arc circularly rotates around an axis of the gear to form the ring surface, a tooth profile curve of the end section of each gear tooth is an involute, and the teeth are synchronously distributed around a center point of the tooth width. By the aid of the gear, three gear transmission forms can be realized, the gear not only can be used for driving of parallel axes, but also can be used for driving of intersecting axes with small axial intersect angles, high axis deflection installation errors are permitted when the gear is used for driving of parallel axes, the axial intersect angles are allowed to dynamically change when the gear is used for driving of intersecting axes, transmission ratio can keep constant when the gear is used for driving of parallel axes and driving of intersecting axes, and the gear teeth are not interfered with each other. By the aid of the method for designing the gear, the involute gear with the ring surfaces is divided into a plurality of tiny tapered involute gears, geometric parameter design of the involute gear with the ring surfaces is carried out, and a process of the method is carried out simply, conveniently and feasibly.

The invention discloses a heavy-load SCARA (selective compliance assembly robot arm) transfer robot and belongs to the technical field of industrial robots. The robot comprises a rack, a first rotating joint, a second rotating joint and a wrist mechanism, an engine seat in the rack is fixedly connected with a big-arm steel wheel flange in the first rotating joint through bolts, a big arm in the first rotating joint is fixedly connected with a second harmonic speed reducer in the second rotating joint through bolts, and a small arm in the second rotating joint is connected with the wrist mechanism through a deep groove ball bearing and a double row angular contact ball bearing. The heavy-load SCARA transfer robot has the advantages of compact structure, easiness in machining and manufacturing, low machining cost, high load carrying capacity and relatively simple transmission.

The invention discloses a downward-pushing magnetic material wet molding hydraulic machine and a use method thereof and belongs to the magnetic material wet forming field. The downward-pushing magnetic material wet molding hydraulic machine comprises a downward-pushing pressing structure. The downward-pushing magnetic material wet molding hydraulic machine further comprises a mechanical limiting structure, a packing structure, a blank fetching system, a double-oil cylinder balance system and a mould surface cleaning system; the downward-pushing pressing structure comprises an upper mould seat, a pushing rod, a large-bore oil cylinder, a fixing mould frame and a lower mould hydraulic cylinder, wherein the upper mould seat is driven by the large-bore oil cylinder, the pushing rod is located in the fixing mould frame, and the fixing mould frame is connected with the lower mould hydraulic cylinder, the large-bore oil cylinder and the lower mould hydraulic cylinder are both communicated with a hydraulic station; the mechanical limiting structure includes a horizontal mechanical limiting structure and a longitudinal mechanical limiting structure; the horizontal mechanical limiting structure comprises the pushing rod and the fixing mould frame; a fixing mould cavity is arranged in the fixing mould frame; the pushing rod is located in the fixing mould cavity in the fixing mould frame; and the longitudinal mechanical limiting structure includes a servo motor A and a transmission mechanism. With the downward-pushing magnetic material wet molding hydraulic machine and the use method thereof adopted, product formation error is small, and the pollution source of slurry to hydraulic oil can be eliminated.

The invention relates to the field of civic building machines, in particular to a road cutting robot and a construction method thereof. A robot body comprises a base, a marked line, a moving table and a cutting device. The base can be put on horizontal ground or inclined ground and provides a track where the moving table continuously moves forwards linearly; the moving table can drive the cutting device on the base to integrally and horizontally move leftwards and rightwards, and can independently move by separating from the base; the cutting device drives a blade used for cutting to integrally swing to adjust cutting depth during one-time forming, and during different strokes, the integral swinging radius of the blade used for cutting is adjusted to adjust the maximum cutting depth. The construction method includes the steps of planning, installing, setting and information feedback. The road cutting robot is easy to operate, wide in application range and can adjust the maximum cutting depth during each stroke.

The invention relates to a mechanical transmission device and particularly relates to an electronic sliding table. The electronic sliding table comprises a sliding table base, a guide rail is arranged on the sliding table base, a sliding fixation block structure, a front fixation block and a rear fixation block are arranged at the two ends of the sliding table base respectively, the rear fixation block is connected with a tail end fixation block, and a driving structure for driving the sliding fixation block structure to move is arranged in the tail end fixation block. The electronic sliding table has the advantages of being ingenious and simple in design, low in noise, wide in use range, convenient to mount, high in accuracy and acceptable to the majority of users.

The invention relates to a double-acting high-voltage sulfur hexafluoride circuit breaker. A double-acting transmission device is arranged between a moving contact assembly and a fixed arc contact. The double-acting transmission device comprises a driving gear rack and a fixed arc contact gear rack which are arranged in parallel and extend along the moving direction of the moving contact assembly. A gear which is simultaneously engaged with the two gear racks in a driving way is arranged between the driving gear rack and the fixed arc contact gear rack. A rib which is in parallel with the driving gear rack is arranged on one side of the back surface of the fixed arc contact gear rack. A roller which is simultaneously in rolling fit with the rib and the back surface of the fixed arc contact gear rack is arranged between the rib and the fixed arc contact gear rack. The lower end parts of the driving gear rack and the rib are fixedly connected onto the moving contact assembly and linearly move back and forth with the moving contact assembly. The driving gear rack is connected with the rib through a linkage plate. The driving gear rack drives the fixed arc contact gear rack to reversely move through the gear. The fixed arc contact gear rack is fixedly connected onto a fixed arc contact to drive the fixed arc contact to linearly move back and forth. The invention additionally relates to the double-acting transmission device of the double-acting high-voltage sulfur hexafluoride circuit breaker.

The invention discloses a rooftop linkage tracing photovoltaic stent and a photovoltaic power generation system, which belongs to the technical field of photovoltaic power generation equipment. The stent comprises a driving mechanism, guide rails and a component unit. The guide rails are laid on rooftop and are fixed. The component unit is arranged across two adjacent guide rails, and comprises a component frame, a sliding part and a connecting rod. The sliding part is arranged in the guide rails. One end of the connecting rod is hinged with the sliding part. The other end is hinged with the component frame. The driving mechanism is applied to the sliding part of the component unit. When the photovoltaic stent is used, the connecting rod is pushed to hold up or lay the component frame. The whole photovoltaic stent structure can be close to the rooftop plane, which effectively reduces wind resistance; the weight of the entire photovoltaic stent structure is light, which reduces the overall structural strength requirement; and the rooftop linkage tracing photovoltaic stent and the photovoltaic power generation system have the advantages of long service life, simple structure, reasonable design and easy manufacture.

The invention provides an interactive semi-automatic grating surface defect detection device and a method using the device, and relates to a defect detection device and the method using the device. The problems that an existing grating surface defect detection device is low in detection precision, low in detection efficiency, poor in anti-interference performance and high in cost are solved. According to the detection device, a motion control cabinet, a grating surface unfolding unit and a first image collecting system unit are sequentially arranged on a detection worktable from left to right in parallel, and a second image collecting system unit and the first image collecting system unit are connected. The defect detection method has the advantages of being high in automation degree, high in detection precision and detection efficiency, high in objectivity and not prone to causing eyestrain. Alignment of the position of a grating to be detected is achieved by driving an electric two-dimensional translation table, and the alignment mode has the advantages of being high in objectivity, high in positioning precision and good in stability compared with manual alignment. The device and the method are used for interactive semi-automatic grating surface defect detection.

The invention belongs to the technical field of deicing equipment, and in particular relates to an icebreaking roller which comprises a connecting rack, a roller rack, a rolling device and a vibrating device which are arranged on an icebreaking automobile, wherein the rolling device comprises an icebreaking roller body, a rotating sleeve and a connecting short shaft; and the vibrating device comprises a main vibrating shaft. The icebreaking roller is characterized in that the main vibrating shaft is rotationally connected with the icebreaking roller body; the main vibrating shaft is connected with the vibrating motor through a small synchronous pulley and a large synchronous pulley; the icebreaking roller body is connected with a driving motor through chain transmission; and the roller rack is connected with the connecting rack on the icebreaking automobile through a lifting device. The icebreaking roller provided by the invention has a floating vibration function, the icebreaking roller lightly touches the ground all the time, the ice on the road is transversely scraped and grinded by an impacting force generated by the main vibrating shaft, and power sources of vibration and rolling are separated, so that the icebreaking roller is high in overload bearing capability, good in icebreaking effect and high in breaking efficiency.

The invention relates to a motor vehicle steering mechanism, in particular to an electric power steering box. The electric power steering box comprises a left steering ball, a rack, an assist motor, a steering box shell, an input shaft and a right steering ball, wherein the left end of the steering box shell is provided with a supporting ring; the rack is assembled inside the supporting ring; the left steering ball and the right steering ball are installed at the left and right ends of the rack respectively; the assist motor is installed on a supporting frame of the steering box shell through bolts; a first transmission gear is arranged on an output shaft of the assist motor; the other end of the output shaft of the assist motor is installed in the steering box shell through a ball bearing; the rack is provided with a steel ball lower spiral groove; a transmission nut is assembled on the spiral groove of the rack; the first transmission gear on the output shaft of the assist motor is matched with a second transmission gear on the transmission nut; the transmission nut is installed on a boss of the steering box shell through a needle bearing. The electric power steering box solves the technical problems that a rack power-assisting type steering box is low in transmission efficiency, large in heat value and the like in the prior art.

The invention relates to a high voltage sulfur hexafluoride breaker and a double acting transmission device of the high voltage sulfur hexafluoride breaker. The high voltage sulfur hexafluoride breaker comprises a silent arc contact, a stationary contact assembly and a moving contact assembly. The double acting transmission device is arranged between the stationary contact assembly and the moving contact assembly. The moving contact assembly drives the silent arc contact to move reversely through the double acting transmission device. The double acting transmission device comprises a driving rack and a silent arc contact rack which are parallel and extend along a moving direction of the moving contact assembly. A gear in engaged transmission with the two racks simultaneously is arranged between the driving rack and the silent arc contact rack. The position of a rotary shaft of the gear is fixedly arranged. The driving rack is fixedly connected onto the moving contact assembly and reciprocates linearly with the moving contact assembly. The driving rack drives the silent arc contact rack to move reversely through the gear, and the silent arc contact rack is fixedly connected onto the silent arc contact and drives the silent arc contact to reciprocate linearly. According to the high voltage sulfur hexafluoride breaker and the double acting transmission device of the high voltage sulfur hexafluoride breaker provided by the invention, the structure is simple, the cost is low, and the requirement of the breaker on the opening speed is met better.

The invention discloses a printing and dyeing device with a uniform dyeing effect and a replaceable template for mechanical automated spinning and relates to the technical field of printing and dyeingof textiles. The printing and dyeing device with the uniform dyeing effect and the replaceable template for mechanical automated spinning comprises supporting feet, a drying chamber and a dyeing chamber, the drying chamber is formed above the supporting feet, and the dyeing chamber is formed in the right side of the drying chamber; a bottom plate is fixed to the top surfaces of the supporting feet, a discharging roller is connected to the rear portion of a first supporting rod, a drying mechanism is disposed in the drying chamber, and limiting blocks are fixed in the dyeing chamber. Accordingto the printing and dyeing device with the uniform dyeing effect and the replaceable template for mechanical automated spinning, the position of a spinning cloth can be automatically adjusted, thereis no need to require a lot of manpower when the device is used, the device is convenient to use, the spinning cloth after printing and dyeing are completed can be dried, the overall efficiency of processing the spinning cloth is improved, and printing and dyeing patterns can be replaced.

The invention provides a synchronous belt main transmission balanced driving rack and pinion elevator. A power transmission system is a synchronous belt main transmission system, the driving system is a balanced driving system, a power dragging system is a permanent magnet DC motor system or a permanent magnet AC synchronous motor system, the balanced driving means that the driving force for driving an elevator car is in left-right symmetry, front-back symmetry, and top-bottom symmetry, The power transmission relation of the synchronous belt main transmission system is that a main power transformation transmission system drives a power shunting transmission system, the power shunting transmission system drives a rack and pinion balanced driving system. A brake wheel coaxial with a motor shaft is equipped with a double-backup power-lossing band-type brake, a 'power-off star connection' unit circuit integrating electrical interlocking and mechanical interlocking is arranged in an electrical control system. The elevator has the beneficial effects of alleviating the self-weight, improving effective transport capacity, and saving energy.

The invention discloses a structure of rope-driven mechanical arm rotation joint. The structure comprises a synchronous belt wheel shaft, a synchronous belt, an angle sensor, an arm joint bearing end plate, a deep groove ball bearing, an angular contact ball bearing and a mechanical arm connection clamping block, wherein the mechanical arm connection clamping block is provided with a connection hole and a steel wire rope through hole; the synchronous belt wheel shaft comprises a belt wheel end and a shaft end from top to bottom; a sensor containing hole, a sensor output shaft connection hole and a cross recessed countersunk head screw inner threaded hole are arranged along the axis of the synchronous belt wheel shaft in sequence; and the inner rings of the deep groove ball bearing and the angular contact ball bearing are respectively fixed at the upper part and the lower part of the belt wheel end through transition fit. According to the structure, the movement of the joint in a relatively large range can be realized; by adopting a detachable structure, the maintenance and carrying are convenient, the structure is simplified, the running efficiency of the joint is improved and the movement coupling of the joint is avoided; the problem that only stretching can be carried out and compression cannot be carried out in the rope driving process, the structure is simple, and stroke range is large, so that the structure is particularly suitable for being installed on the disabled and aged helping facilities such as wheelchairs and care beds.

Provided is a separation bed for a differential type pneumatic dry separator. A separation bed box body is connected with a transmission frame through an adjustment connection device, and a vibration exciter is installed at the bottom at one end of the transmission frame. Two ends of the separation bed respectively serve as a feeding port and a discharging port, a discharging blocking plate and a back plate respectively serve as two long sides of the rectangular box body, the bottom face of the separation bed box body is formed by multiple rectangular zigzag rubber screening plates, and the separation bed is arranged obliquely. When the separation bed is oblique in the length direction of the separation bed, and a longitudinal included angle formed by the bottom face of the separation bed and a horizontal plane is 4-10 degrees. When the separation bed is oblique in the width direction of the separation bed, and a transverse included angle formed by the bottom face of the separation bed and the transmission frame is 4-8 degrees. The separation bed has the advantages of being compact in structure, simple and convenient to operate, good in abrasion resistance, high in friction coefficient, small in noise, long in service life, stable in transmission, simple and convenient to maintain and good in antifouling property, having no need for lubrication and the like.

The invention provides a football storage device and belongs to the technical field of teaching tools. The invention adopts the technical scheme that the football storage device comprises a container,a storage device arranged on the inner side wall of the container and a fetching device arranged in the container. The football storage device provided by the invention has the beneficial effects that a large amount of footballs can be stored, so that the problem of less football storage amount in the common container is solved, and the purpose of convenient football fetching can be achieved; byadoption of the technical scheme, the space in a sports equipment room can be saved.

The invention discloses a synchronous belt, which relates to the technical field of belt drive. In the belt, a base body is provided with convex teeth which are arranged continuously and sequentially, the cross section has an annular shape, and the longitudinal section has a double-sized tooth bar shape. The synchronous belt can be widely applied to parallel shaft, intersected shaft, crossed shaft and multi-driven-wheel drive. The synchronous belt has the advantages of constant drive ratio, stable and flexible drive, low noise and high drive efficiency.

The invention discloses workpiece locating and clamping equipment. The workpiece locating and clamping equipment comprises a shell, wherein an active drying mechanism is arranged in the shell, the workpiece locating and clamping equipment also comprises a slave driving mechanism driven by virtue of the active drying mechanism, and the slave driving mechanism drives a clamping mechanism to act; theactive drying mechanism comprises a cylinder, a driving rack driven by the cylinder and a driving gear meshed with the driving rack; the slave driving mechanism comprises a screw connected with the driving gear, and two sides of the screw are respectively meshed with a first driven gear and a second driven gear; the slave driving mechanism is arranged in a fixation frame, the screw runs through the fixation frame to be connected with the driving gear, and a left driving arm and a right driving arm which are respectively driven by the first driven gear and the second driven gear by virtue of the screw; and the cylinder drives the driving rack to drive the driving gear to move and drive the screw to rotate, so as to drive the left driving arm and the right driving arm to drive a left grabbing arm and a right grabbing arm, and the left grabbing arm and the right grabbing arm drive a left gripper and a right gripper to clamp or loosen.

The invention discloses an agricultural greenhouse linkage tracking photovoltaic stent and a photovoltaic power generation system, which belongs to the technical field of photovoltaic power generation equipment. The stent comprises a column stent, a driving mechanism, guide rails and a component unit. The column stent is arranged above an agricultural greenhouse. The height of the column stent is slightly higher than the height of the agricultural greenhouse. The guide rails are fixed on the column stent. The component unit is arranged across two adjacent guide rails, and comprises a component frame, a sliding part and a connecting rod. The sliding part is arranged in the guide rails. One end of the connecting rod is hinged with the sliding part. The other end is hinged with the component frame. The driving mechanism is applied to the sliding part of the component unit. When the photovoltaic stent is used, the connecting rod is pushed to hold up or lay the component frame. According to the invention, the design thought of wind hiding and the theory of bionics are used; in one minute, the component unit automatically lays down, so that the windward surface is small and the wind resistance is reduced to ensure the safety of the stent, the system and the agricultural greenhouse; loss caused by the disaster is avoided; and the stent and the system have the advantages of simple structure, reasonable design and easy manufacturing.

The invention discloses a variable-rigidity robot joint structure which comprises a joint mechanism and a variable-rigidity adjusting mechanism. The joint mechanism comprises a first joint and a second joint, and the first joint and the second joint are connected through a first driving assembly; the variable-rigidity adjusting mechanism comprises a shell and a gear and rack assembly, the gear and rack assembly comprises a gear and a rack which are meshed with each other, the variable-rigidity adjusting mechanism further comprises a second driving assembly capable of driving the gear to rotate, the rack is slidably connected to the shell, and an elastic piece is further arranged on a moving path of the rack; and the two ends of the elastic piece abut against the rack and the shell correspondingly, so that the rack can compress the elastic piece when sliding along the shell. By means of the variable-rigidity robot joint structure, rigidity adjustment can be achieved, so that the using safety of a robot is improved, further damage to people and the surrounding environment is avoided, and man-machine safety is achieved.

The invention provides a drilling device used for pipe jacking construction and belongs to the technical field of municipal engineering. The technical scheme includes that the drilling device comprises a base plate, an intermittent motion mechanism is arranged on the base plate, and a drilling mechanism is arranged on the intermittent motion mechanism. The drilling device has the advantages that manual soil ploughing can be replaced, working efficiency is high, and injury to the body, caused by manually lying on front to plough can be avoided.

The invention discloses a synchronous rolling device of a thin material punching machine. A rolling shaft and an unrolling shaft are respectively positioned at both ends of a synchronous belt wheel paper feeding mechanism and can be nestled to a main circulating conveyor belt on the synchronous belt wheel paper feeding mechanism and driven to rotate by friction of the main circulating conveyor belt, wherein the unrolling shaft can be synchronously released from or nestled to the main circulating conveyor belt to act under the drive of an unrolling shaft drive mechanism so as to be converted between two working states; in the first working state, the unrolling shaft can not be driven to rotate by the friction of the main circulating conveyor belt; in the second working state, the unrolling shaft can be driven to rotate by the friction of the main circulating conveyor belt; and the rolling shaft can be freely released from or nestled to the main circulating drive belt to act. The invention provides the synchronous rolling device of the thin material punching machine, which can achieve zero meter start under the premise of not wasting the thin material.

The invention provides an improved horizontal vessel rotating device which is characterized in that the improved horizontal vessel rotating device comprises rolling wheel stands (1), rolling wheels (2), rolling paths (3), a vessel cylinder body (4), a gear (5) and a transmission device (6), wherein the rolling wheel stands (1) are arranged on the bottom surface of the improved horizontal vessel rotating device; the rolling wheels (2) arranged on the outer edge of the vessel cylinder body (4) are arranged on the rolling wheel stands (1); and the gear (5) arranged on the vessel cylinder body (4) is connected with the transmission device (6) in a meshed manner. The transmission manner of the improved horizontal vessel rotating device provided by the invention adopts a gear transmission manner which has the characteristics of constant transmission ratio, compact structure, high transmission efficiency, and the like. The large gear of the improved horizontal vessel rotating device provided by the invention is arranged on the vessel cylinder body, and a large gear connecting seat and the surfaces of the rolling paths are integrally processed by utilizing a large machine tool, so that the excircles of the two rolling paths are guaranteed to be concentric with the large gear, the operation is stable and the consumed power is low.

The invention discloses a three-roller grinding machine with a cooling system for removing peculiar smell function of chemical industry, relates to the technical field of material grinding and processing equipment, in particular to a three-roller grinding machine with a cooling system for removing peculiar smell function of the chemical industry. The three-roller grinding machine with the coolingsystem for removing the peculiar smell function comprises a shell, a bottom plate and a blocking block, wherein the bottom plate is arranged in the center of the inner part of the shell, the blockingblock is located at the top end of the shell, a universal wheel is connected below the shell, a fixing block is arranged above a rotating shaft, and a motor chamber is arranged at the bottom end of the interior of the shell. According to the three-roller grinding machine with the cooling system for removing peculiar smell function of the chemical industry, the ground raw materials fall on the bottom plate under the action of gravity, then the ground raw materials pass through the inclined bottom plate, so that the raw material slides to the right end of the bottom plate, then a baffle is rotated through hinges, so that the ground raw materials can be taken out, the structure is simple, and the ground raw materials can be taken out without a complicated structure.

The invention provides a soil plough used for pipe jacking construction and belongs to the technical field of municipal engineering. The technical scheme includes that the soil plough comprises a baseplate, an intermittent motion mechanism is arranged on the base plate, and a drilling mechanism and a reaming mechanism are arranged on the intermittent motion mechanism. The soil plough has the advantages that manual soil ploughing can be replaced, working efficiency is high, and injury to the body, caused by manually lying on front to plough can be avoided.

The invention belongs to the technical field of intelligent buildings and especially relates to access control equipment for intelligent buildings. The equipment comprises a wall body, a fixed plate and an operation plate; a moving plate is mounted in the wall body; an adjusting mechanism is fixed below the moving plate; a lighting mechanism is arranged on the right side of the fixed plate; a transparent plate is mounted on the surface of the front end of the operation plate; a camera is arranged in the operation plate; an extension block is fixed to the rear portion of a shielding mechanism,and a magnetic block is attached to the surface of the back of the extension block; a sliding groove is formed in the outer portion of the magnetic block, and a magnetic plate is attached to the innersurface of the sliding groove; a bottom plate is fixed to the lower portion of the magnetic plate; and an identification block is arranged on the surface of the front end of the bottom plate. The access control equipment for intelligent buildings is convenient to use, can automatically open and close the unlocked door, avoids the situation that irrelevant personnel or lawbreakers enter the building due to the fact that the door is forgotten to be closed, is conspicuous at night, can illuminate, and can also be normally used at night.

A rotermeter linkage device with a synchronous belt comprises an oxygen flow meter (10) and a laughing gas flow meter (9); flow control knobs (2) of the meters are provided with a gear respectively; the two gears are connected by the synchronous belt (14); the flow control knobs (2) control a gap between a needle valve lift pin (3) and a gas inlet (4); and the linked flow control knobs respectively change the size of the gap between the needle valve lift pin (3) and the gas inlet (4) so as to regulate ratio of outputted gas flow. The rotermeter linkage device adopting the synchronous belt can provide oxygen and laughing gas according to preset ratio; and the output ratio of the oxygen to the laughing gas is accurate, stable and easily controlled, and the consistency of oxygen concentration in forward and reverse strokes is good.

The invention relates to an automobile axle assembly, in particular to a full-face gear drive axle assembly. According to the technical scheme, the full-face gear drive axle assembly comprises a driving gear shaft, an output shaft, a differential housing, a planetary shaft, a planetary shaft sleeve, a planetary gear, a half-axle face gear and a half-axle. The half-axle face gear is installed in two transverse through holes in the inner cavity of the differential housing, and the planetary gear is installed in two longitudinal through holes in the inner cavity of the differential housing. A shoulder is arranged on the outer wall of the differential housing, a plane boss is arranged at the inner end of a planetary shaft hole, a driven face gear is installed on the shoulder through bolts anda washer, the planetary gear is limited by the planetary shaft sleeve and the plane boss in the differential housing separately, and the driving gear shaft meshes with the driven face gear to drive the differential housing to rotate. By adopting the technical scheme, the full-face gear drive axle assembly is a novel face gear drive axle main reducer assembly which is high in strength, large in drive ratio, compact in structure, low in machining cost, high in interchangeability and easy to install and maintain.

The invention discloses a head-mounted device and an adjusting module thereof, the adjusting module comprises a driving assembly, a gear, a fixed rack and a movable rack, the gear is rotatably connected to the driving assembly, and the movable rack is used for being connected with a to-be-adjusted part. The gear is arranged between the fixed rack and the movable rack and meshed with the fixed rack and the movable rack, the gear is driven by the driving assembly, and the gear drives the movable rack to move so as to achieve movement of a part to be adjusted. According to the adjusting module, the movable pulley principle is adopted, the driving distance can be reduced, under driving of the driving assembly, the gear moves by a certain distance, and the to-be-adjusted part can move with the effect of being twice the moving distance of the gear, so that the adjusting efficiency can be improved, and the power consumption of the driving assembly can be reduced; and therefore, the working efficiency and the service life of the adjusting module can be improved.