33results about How to "Avoid strain" patented technology

Frame reinforcing integrated type counter-pressure casting equipment comprises counter-pressure casting equipment, a left reinforcing frame, a right reinforcing frame and a connecting flange base, the counter-pressure casting equipment is formed by connecting a bottom plate, a middle plate, a movable plate and a top plate together through four large bars, a crucible furnace is located between the bottom plate and the middle plate, and a mold is located between the middle plate and the movable plate. The movable plate is connected to an oil cylinder on the top plate, and mold opening and closing are achieved through stretching and retracting of the oil cylinder. The left reinforcing frame and the right reinforcing frame are respectively connected with a connecting flange seat, and the connecting flange seat is fixed on a bottom plate and a top plate of the counter-pressure casting equipment. The rigidity of the device can be improved, shaking is eliminated, and the problems that a casting is pulled, a copper sleeve of a device platen is abraded aggravated, and a large bar lock nut is prone to loosening are solved. Meanwhile, complete standardized design is achieved, final assembly debugging is completed before delivery, the installation and debugging time is greatly shortened, and the delivery cost is saved.

This utility model relates to the field of pipe processing technology and discloses an inlaid roller mold for preventing damage to the surface of pipe fittings during bending. The mold includes a base, a mounting plate fixedly mounted on the top of the base, an L-shaped plate fixedly mounted on the top of the mounting plate, a cylinder fixedly mounted on the top of the base, two bending rollers symmetrically arranged on the front side of the L-shaped plate, an adjustment component on the rear side of the L-shaped plate, and a lifting component at the output end of the cylinder. This utility model avoids sliding friction between the mold and the pipe fitting by using rollers to contact the pipe fitting surface, thus preventing surface damage. Furthermore, the rollers act as guides during bending, ensuring the pipe fitting moves along a preset bending path. The rollers also distribute the concentrated pressure during bending to multiple contact points, preventing localized deformation or damage to the pipe fitting. The distance between the two bending rollers can be adjusted to accommodate different bending sizes.

A mold structure, pressure processing device, and pressure processing method are disclosed, which can reduce the impact of unstable positioning accuracy caused by the press body, eliminate the need for adjustment of the pressure processing device by a skilled person, have excellent productivity, and are easy to install and disassemble relative to the press body. The mold structure (1) includes a lower mold (3) fixed on a fixed table (2); an upper mold (4) disposed above the lower mold (3); a first elastic body (11) and a stop (10) disposed between the upper mold (4) and the lower mold (3); and a pressure adjustment device (6) connected to the movable table (5) of the upper mold (4). When the pressure processing is not pressurized, the first elastic body (11) separates the upper mold (4) and the lower mold (3). When the pressure processing is pressurized, the stop (10) specifies the bottom dead center position of the upper mold and applies pressure from the movable table (5) to the upper mold (40) through the pressure plate (7) of the pressure adjustment device (6) via the second elastic body (8), thereby clamping the material (30) to be processed between the upper mold (4) and the lower mold (3) for pressurization.

The application discloses a brake footboard device and a vehicle, which comprises a mounting bottom plate, a brake valve, a brake footboard mechanism and an angle detection module. The valve top of the brake valve extends upward from the mounting bottom plate. The brake footboard module of the brake footboard mechanism is installed on the mounting bottom plate through a first overturning installation module. The pressing member is arranged on the lower side of the brake footboard module and faces the valve top. The brake footboard module overturns downward and drives the pressing member to press the valve top under the action of the foot pedal force. The brake footboard module overturns upward and returns to the initial posture under the condition that the foot pedal force is removed. The angle detection module is used for brake control of the transmission system of the vehicle according to the downward overturning angle of the brake footboard module. The pedal stroke and the brake force curve are close to the ideal linear relationship, the power transmission path is simple, the energy loss is small in the transmission process, the brake force is prevented from being greatly attenuated, the advantages of electric control and mechanical brake are combined, the brake force is quickly improved, and the brake distance is shortened.

The application discloses a portable broad bean picking device and a picking method thereof, and relates to the technical field of agricultural machinery, comprising a rotary cutting gear transmission mechanism and a steel wire centering guide mechanism; the rotary cutting gear transmission mechanism comprises a rotary cutting gear which is hollow and provided with circumferential radial notches and a suspension supporting structure, the rotary cutting gear is connected with a rotary cutting tool and externally engaged with a driving gear; the suspension supporting structure comprises circular arc tracks arranged on upper and lower surfaces of the rotary cutting gear and a plurality of universal ball bearings thereon; the steel wire centering guide mechanism comprises a plurality of elastic steel wires which are circumferentially arranged around the rotary cutting tool rotation center and a radial opening and closing mechanism. The application realizes continuous, efficient and in-situ cutting of broad beans from stems, can adapt to plants in different growth states, and significantly reduces the missing picking rate and damage; the handheld design makes the operator keep upright operation, reduces the labor intensity, the overall structure is light and flexible, and provides an efficient and labor-saving picking solution for small and medium-sized planting.

The utility model discloses a gearbox housing snatchs the grab hand belongs to gearbox production technical field. The device includes hoisting subassembly, and hoisting subassembly output is provided with the hoisting plate, and the front clamping plate is fixedly arranged in the hoisting plate front side, and the back clamping plate that cooperates with the front clamping plate is movably connected to the hoisting plate rear end, and the hoisting plate is provided with the clamping mechanism that is used for driving the back clamping plate bottom to draw close to the front clamping plate to hold the gearbox housing for cooperation, and the vertical vibration motor that is used for generating the up and down direction vibration is fixedly arranged on the front clamping plate top. The utility model discloses when using, and the vertical vibration motor is with 200 300Hz high frequency micro amplitude vibration direct action on the shell joint surface, and only needs 5 seconds to make the up and down shell body and internal component accurate adhesion, and the efficiency is improved. The first, second cooperation piece of rubber material guarantees friction force and prevents slipping, and also avoids shell surface damage, and the vibration energy is evenly transmitted through the contact surface simultaneously, thereby improve the overall assembly efficiency.

The utility model discloses a mould for foaming a vehicle seat, which comprises a base, a fixed mould base arranged on one side of the upper end of the base, a movable mould base arranged in the middle of the upper part of the base and capable of sliding left and right relative to the fixed mould base, and a driving device for driving the movable mould base to move left and right, a lower mold is arranged on the side, facing the fixed mold base, of the movable mold base, after the seat foaming cushion is formed, the upper mold making small-area contact with the foaming cushion moves away from the lower mold and moves out of the forming mold groove, then the hydraulic cylinder is started, and the push rod, the top mold plate and the foaming cushion are pushed to move rightwards through the piston rod; under the mutual cooperation of the spring and the linear vibration motor, the top mold plate is used for carrying out high-frequency elastic vibration pushing on the foaming cushion embedded in the forming mold groove, so that on one hand, the surface deformation and strain of the foaming cushion during hard taking-out can be prevented, and on the other hand, the foaming cushion can be continuously ejected out of the mold groove more linearly and smoothly.

The utility model relates to medical equipment technical field discloses a kind of multi-angle breast tumor image linkage observation stand, including stand, the upper end of the stand is connected with telescopic column for adjusting, the side of telescopic column is fixedly installed with the mounting plate for connection, the side of the mounting plate is fixedly connected with the support for positioning.This multi-angle breast tumor image linkage observation stand is cooperatively arranged by stand, telescopic column, mounting plate, support, first adjusting plate, second adjusting plate, connecting frame and display screen, the angle adjustment of display screen in horizontal rotation can be realized by the combination of first adjusting plate and second adjusting plate, the detachable design of connecting frame is combined, to form all-around adjustment range, thereby solve the limitation of the fixed angle of traditional observation stand, doctor can observe tumor morphology, boundary and the relationship with surrounding tissue from different angles without repeatedly adjusting own posture, avoid missing key information due to insufficient viewing angle.

The invention discloses a multidirectional core-pulling automobile door panel mold, relates to the technical field of injection molding molds, and aims to solve the technical problem that in the prior art, core-pulling and demolding are difficult due to the fact that internal inverted buckles exist in drum-shaped and other special-shaped mounting holes, and the multidirectional core-pulling automobile door panel mold comprises an automobile door panel injection mold body, a static mold body and a movable mold body. And the static mold and the movable mold are closed to form an injection molding cavity. The multidirectional core-pulling automobile door panel mold disclosed by the invention has the beneficial effects that the composite core mechanism formed by alternately splicing the inclined panels and the flat panels which can stretch out and draw back in the radial direction is arranged in the mold closing cavity of the static mold and the movable mold, so that one-time high-precision forming and lossless demolding of complex special-shaped mounting holes in an automobile door panel are realized; a series of technical problems that in the prior art, due to the fact that a traditional core-pulling mechanism cannot process a complex hole structure with the middle diameter larger than the end opening diameter or with an internal step, demolding interference, product strain, flash, difficulty in guaranteeing size precision and the like are caused are solved.

The invention relates to resistance measurement, in particular to the technical field of generator detection, and discloses a generator stator winding resistance testing device which comprises a base, a three-phase motor, a megohmmeter and a rotating motor are mounted on the base, and a rocker arm output shaft of the megohmmeter is fixedly connected with an output shaft of the rotating motor. The three-phase motor is provided with a winding portion, the winding portion is provided with a switching portion, the switching portion is provided with a lead portion, the base is provided with a support, the support is provided with an adjusting portion, the support is further provided with a control portion, the support is further provided with a case, the megohmmeter is provided with a conversion portion, and the megohmmeter is provided with a control portion. A microprocessor is arranged in the case, mechanical linkage of the switching part and the conversion part and control of the microprocessor are adopted, loop switching of U-V, V-W and W-U interphase tests and U-ground, V-ground and W-ground-to-ground tests is automatically completed, manual wire dismounting and wiring are not needed, automatic switching is achieved, and the test efficiency is improved.

The utility model belongs to the field of epilepsy protection, provide a kind of epilepsy protection device, including helmet and the two positioning plates of symmetrical distribution located below helmet, the bottom both sides of the helmet are respectively provided with and two positioning plates one-to-one corresponding connection's buffer assembly, the buffer assembly includes the connecting plate being set on positioning plate upper portion, rotating shaft is rotatably arranged on the connecting plate, and the one end of rotating shaft is provided with sleeve;The utility model is through the collaborative structure of helmet, positioning plate and buffer assembly, when patient epilepsy, by the cooperation of moving plate, sleeve and spring, the effective limit of patient head can be realized, avoid the neck muscle sprain, cervical vertebra injury caused by head excessive skew when epilepsy, simultaneously only need to twist lock bolt to push L-shaped plate and move adjustment head between helmet and positioning plate The use interval is to adapt to the patient of different head shoulder proportion, further improve the comfort of patient when using.

The utility model relates to an integrated flexible end effector for capsicum frutescens harvesting. The device comprises a flexible clamping mechanism, a rotary posture adjusting mechanism, a fruit stem separating mechanism and a jet conveying mechanism, capsicum frutescens can be clamped through the flexible clamping mechanism, the posture of the capsicum frutescens can be finely adjusted through the rotary posture adjusting mechanism, fruits and fruit stems can be conveniently cut and separated by the fruit stem separating mechanism, and the capsicum frutescens can be conveyed to a collecting frame through the jet conveying mechanism. According to the scheme, only the posture of capsicum frutescens needs to be finely adjusted, large-amplitude rotation is not needed, and therefore the perfectness rate of picked fruits is increased; and the capsicum frutescens is collected in a blowing manner, so that the problem of blockage is avoided.

A high-efficiency plate heat exchanger for industrial cooling water, relating to the field of plate heat exchanger technology, includes a base and two fixed plates. Four guide plates are fixed between the two fixed plates. Hot-side plates and cold-side plates are alternately arranged between the two fixed plates. Both the hot-side and cold-side plates are connected to the guide plates and can slide along the length and width directions of the guide plates, respectively. The ends of the hot-side plates have a first hot flow channel and a second hot flow channel, and the ends of the cold-side plates have a first cold flow channel and a second cold flow channel. The upper and lower ends of both the hot-side and cold-side plates are perforated with alternately arranged hot fluid holes and cold fluid holes. The first and second hot flow channels communicate with the hot fluid holes, and the first and second cold flow channels communicate with the cold fluid holes. The depths of the first hot flow channel and the first cold flow channel are smaller than the depths of the second hot flow channel and the second cold flow channel, respectively. This invention solves the problem of cumbersome plate flow channel adjustment procedures in existing plate heat exchangers.

The utility model relates to the technical field of seat, specifically disclose translatable slide cushion, including seat base and backrest pad, still include: cushion translation subassembly and waist pad translation subassembly, cushion translation subassembly sets up at the top of seat base, backrest pad sets up at one side of cushion translation subassembly, waist pad translation subassembly sets up at one side of backrest pad, cushion translation subassembly includes cushion body, waist pad translation subassembly includes waist pad body, and the cushion body shifts position according to user demand, and the waist pad body follows the cushion body and shifts, the shift of cushion body can adjust hip stress area, avoid local pressure concentration, the dynamic support of waist pad body helps maintain the natural curvature of spine, when the cushion body shifts, the waist pad body automatically follows the shift through mechanical transmission structure, ensure that the waist support always matches the change of sitting posture, avoid the muscle strain caused by the waist suspension or excessive compression.

This utility model relates to the field of sports training equipment technology and discloses a shot put training and testing device, including a protective pad, an auxiliary mechanism, and a recovery component. The surface of the protective pad is marked with landing area scales, and the upper end of one side of the protective pad along its length is inclined. The auxiliary mechanism includes a protective component and an adjustment component. The protective component is used to protect the middle school student's waist, the adjustment component is used to adjust the height of the protective component, and the recovery component is used to retrieve the shot put after it has been thrown. This shot put training and testing device, by setting up a protective component, can conform to the contour of the middle school student's waist during back-raising posture training, providing stable and appropriate auxiliary support, effectively dispersing the enormous pressure on the waist during the back-raising process, avoiding muscle strain due to overstretching or uneven stress, and ensuring the student's physical safety during training.

The application discloses a middle cylinder assembly of a hydraulic breaking hammer, which comprises a middle cylinder body assembly, a piston and a reversing valve, and a compression chamber, a high-pressure chamber and a variable-pressure chamber are sequentially arranged in the inner hole of the middle cylinder body assembly from left to right, a reversing pressure relief groove and an oil return groove are arranged at the left side of the compression chamber, a reversing groove is arranged between the high-pressure chamber and the variable-pressure chamber or the reversing groove and a high-pressure groove are arranged at the right side of the variable-pressure chamber, the reversing groove and the reversing pressure relief groove are connected with the reversing chamber of the reversing valve through the internal oil passage of the middle cylinder body assembly, the oil return groove is connected with the low-pressure oil passage in the middle cylinder body, the left part of the piston is provided with a pressure relief ring groove for connecting the reversing pressure relief groove and the oil return groove, when the reversing groove and the high-pressure groove are arranged at the right side of the variable-pressure chamber, the high-pressure groove is connected with the high-pressure oil passage in the middle cylinder body, and the right part of the piston is provided with a reversing ring groove for connecting the reversing groove and the high-pressure groove. The middle cylinder assembly can realize the working cycle of the breaking hammer, prolong the service life of the oil seal, improve the support and lubrication of the high-pressure oil film and prevent the piston and the cylinder body from being abraded and strained.

The application discloses a fixed ring locking thread unit and a locking thread cutting device. In the fixed ring locking thread unit, the accommodating cavity and the first hole are communicated with each other, the fixed ring and the suture are placed in the accommodating cavity from the first hole, the fixed ring is accommodated and limited by the accommodating cavity, the sealing member is partially extruded into the fixed ring, the suture passing through the fixed ring is fixed between the inner wall of the fixed ring and the sealing member by the close cooperation of the sealing member and the fixed ring, the problems that the fixed ring cannot effectively clamp the suture and the suture effect is poor caused by directly extruding the fixed ring are avoided, the fixed ring is prevented from falling off from the sutured tissue position after the suture is cut, the operation failure is avoided, the fixed ring and the suture are prevented from moving together, the sutured tissue is prevented from being pulled, the suture is prevented from returning to the sutured tissue, and the tissue healing time is prolonged.

This invention belongs to the field of electronic component technology and discloses an inductor structure and its preparation method. The inductor structure includes: a base with mounting holes; a permanent core rod installed in the mounting holes of the base; a coil winding wound around the permanent core rod, with at least a portion of the free end of the coil winding folded around the surface of the base, the free end serving as an electrical connection portion for electrical connection with an external circuit; and a package tightly encapsulating the permanent core rod, coil winding, and base, with the electrical connection portion located on the outside of the package. The preparation method of the inductor structure includes the following steps: assembling a temporary core rod and base, winding the coil winding, processing the electrical connection portion, folding and fixing the coil winding, replacing the core rod, and processing into a finished product in a molding die. The above-mentioned inductor structure preparation method is simple to operate and has simplified steps, which shortens the production cycle while improving the yield rate of inductor products, resulting in low product loss and low impedance.

The application discloses a writing health prompting method, a handwriting pen and a storage medium, and relates to the technical field of input device control. The method is applied to the handwriting pen, and the handwriting pen comprises a pressure detection module, a posture sensing module, a main control module and an addressable light source. The method is executed by the main control module, and comprises the following steps: acquiring pen tip pressure data of a pen tip of the handwriting pen acting on an input surface collected by the pressure detection module; acquiring spatial posture data of a pen body of the handwriting pen relative to a reference surface collected by the posture sensing module; generating a pressure feedback parameter based on a preset pressure interval and the pen tip pressure data; generating a posture feedback parameter according to a preset holding posture and the spatial posture data; and controlling the addressable light source to perform visual feedback based on the pressure feedback parameter and / or the posture feedback parameter.

The invention discloses an ejection structure for a mobile phone support product, and relates to the technical field of mobile phone support product ejection, the ejection structure comprises a mold base and a first assembly mounted on the mold base, the cross section of the mold base is U-shaped, and the first assembly comprises an ejection transmission assembly, a mold forming assembly and a guide positioning assembly; the ejection transmission assembly comprises an ejector pin bottom plate and an ejector pin panel, the ejector pin bottom plate is in transmission connection with the ejector pin panel through a guide column, and the ejector pin panel is provided with a positioning hole used for installing the ejection execution assembly; through cooperative operation of a sliding rod, a spiral groove, a limiting body and the like in the fourth assembly, linear ejection force restored by a spring is converted into stable rotary lifting motion, the ejection speed of the inclined ejection block is further reduced through the design of a large spiral lead, the lifting stability is improved, uniform power transmission is achieved in cooperation with composite ejection motion of the inclined ejection block in the 45-degree direction, and the service life of the inclined ejection block is prolonged. And the problem of unbalanced ejection of the small bracket is thoroughly solved, and the product deformation rate is reduced to an extremely low level.

The invention discloses a stamping and riveting die for precise sheet metal part production, and relates to the technical field of stamping forming, the stamping and riveting die comprises a lower die base and an upper die base, and the lower end of the upper die base is provided with a guide sleeve matched with a guide column; a main board is arranged between the lower template and the upper template, and a patch board is placed at the upper end of the main board; a middle female die is fixedly arranged in the middle of the lower die plate, and an upper male die is arranged at the position, corresponding to the middle female die, of the upper die plate. A plurality of push rod assemblies are arranged in the lower die plate, and movable female die assemblies are arranged on the sides, facing the middle female die, of the push rod assemblies. During die assembly, the upper die base moves downwards to drive a push rod unit in the push rod assembly to move through the guide sleeve and drive a movable female die unit in the movable female die assembly to move, and the movable female die unit is matched with the middle female die to form a riveting groove. According to the mold, product strain or deformation caused by too large demolding resistance is avoided, and the smoothness of the demolding process and the product yield are improved.

The application discloses a linkage type injection molding insert ejection mechanism, which comprises a rack, a supporting seat for supporting injection molded parts is arranged at the top of the rack, and at least two pressing assemblies for pressing the injection molded parts are arranged on both sides of the supporting seat; at least one limiting seat is detachably arranged on the supporting seat, each limiting seat corresponds to two inserts, and a rectangular hole for the inserts to pass through is formed in the limiting seat; two first and second follow-up ejection assemblies for respectively ejecting corresponding inserts are arranged below the supporting seat, a first ejection assembly matched with the first follow-up ejection assembly is arranged at one end of the supporting seat, and a second ejection assembly matched with the second follow-up ejection assembly is arranged below the supporting seat. The application also discloses an injection molded product marking device. The ejection assembly and the follow-up ejection assembly are synchronously matched, a pushing and pulling resultant force is formed, the inserts are uniformly stressed, and the inserts are smoothly pulled out.

The invention discloses an automatic turnover device and method for a marine diesel engine cylinder block. The automatic turnover device for the marine diesel engine cylinder block comprises a pit, a supporting bracket, a turnover support and two driving assemblies. The overturning support comprises two supporting frames which are vertically connected, and the overturning support has a first posture in which the outer wall of one supporting frame abuts against the supporting bracket in parallel and a second posture in which the outer wall of the other supporting frame abuts against the supporting bracket in parallel. Each driving assembly comprises at least one hydraulic cylinder, one end of each hydraulic cylinder is rotationally installed on the bottom face of the pit through a supporting base, the other end of each hydraulic cylinder penetrates through the corresponding supporting bracket and is hinged to the outer wall of the corresponding supporting frame, and the two driving assemblies are matched to drive the overturning support to overturn between the first posture and the second posture in a reciprocating mode. The driving assembly is simple in structure and convenient to control, mounting steps of a turnover device mechanism and the air cylinder body can be simplified, meanwhile, steel wire ropes are prevented from pulling the surface of the air cylinder body, and operation efficiency and product quality are improved.

The application relates to the field of die-casting molds, in particular to a three-plate two-stage runner die-casting mold and method, which comprises a static mold plate, a middle plate is movably arranged on the left side of the static mold plate, a movable mold plate is arranged on the left side of the middle plate and matched with the middle plate, a runner groove is arranged on the right side of the middle plate, and a runner sleeve matched with the runner groove is fixedly connected to the middle part of the static mold plate. The three-plate two-stage runner die-casting mold is used in cooperation with a material handle limiting mechanism and an adjusting mechanism, in the mold opening process, a small-angle deflection of a limiting ring and a positioning rod is generated through cooperation of a driving lever and a wedge-shaped plate inclined surface, the material handle is subjected to a circumferential torsion force while bearing axial stretching, the runner neck is neatly and quickly disconnected, tearing of the runner, deformation or strain of the product caused by simple axial pulling is avoided, the product breakage is smooth and the contour is complete, and therefore the appearance quality and the structural strength of the product are effectively improved.

This invention relates to an injection mold for producing six-hole injection molded products, comprising an upper ejector plate, an upper mold, and a lower mold. The upper and lower molds, stacked vertically, are mounted on the lower end face of the upper ejector plate. A mold core structure is installed between the upper and lower molds, and a mold cavity structure is provided between the mold core structures. Side hole core-pulling devices are symmetrically arranged side-by-side on the front and rear sides of the mold cavity structure. A central hole core-pulling device, inserted into the mold cavity structure, is installed between two side hole core-pulling devices. A mold foot structure is mounted on the lower end face of the lower mold. A rack-and-pinion drive structure for controlling the side hole core-pulling action is installed on the front side of the upper mold and the rear side of the lower mold. The rack-and-pinion drive structure on the upper mold is arranged in a forward direction, while the rack-and-pinion drive structure on the lower mold is arranged in a reverse direction. One end of each side hole core-pulling device is inserted into the mold cavity structure. This invention features high product precision, no pull-out damage, convenient product removal, and space saving within the mold.

This invention provides a carton folding mechanism, including a support frame, a guide plate suspended below the support frame, and an inclined portion at the rear end of the guide plate. A first cylinder, arranged at an angle, is mounted at the rear end of the support frame, with its output end connected to a pressure head facing the inclined portion of the guide plate. Side pressure assemblies are provided on both sides of the support frame, each comprising a second cylinder, a connecting rod, and a side pressure plate. The second cylinder is inclinedly mounted beside the support frame, its output end pivotally connected to the upper end of the connecting rod, and the lower end of the connecting rod connected to the side pressure plate. Two downwardly extending vertical plates are provided on both sides of the support frame, with the two ends of the side pressure plate rotatably positioned between the two vertical plates. This invention, through the coordination of the guide plate, pressure head, and side pressure assemblies, achieves continuous automated folding of the front, back, left, and right flaps of the carton, significantly improving folding efficiency compared to manual folding and meeting the needs of large-scale production.

This utility model belongs to the field of sports equipment technology, and specifically relates to a counterweight arm for anti-theft adjustable resistance fitness equipment. A transverse lever arm tube is rotatably connected to the main frame, extending in the front-to-back direction. A sliding device is slidably connected to the transverse lever arm tube in the front-to-back direction, and a counterweight is mounted on the sliding device. The front end of a linkage drive mechanism is connected to the sliding device. A positioning adjustment system is connected to the transverse lever arm tube, and the rear end of the linkage drive mechanism is connected to the positioning adjustment system. By using the linkage drive mechanism to drive the sliding device to slide along the transverse lever arm tube in the front-to-back direction, the counterweight on the sliding device can be moved to different positions on the transverse lever arm tube, providing users with training resistance of varying intensities. Compared to existing technologies that adjust the number of counterweights, this allows for continuous or precise resistance adjustment, which is beneficial for meeting the personalized training needs of different users.

The application discloses a kind of intelligent garlic sprout harvesters, it is related to agricultural harvesting machinery technical field, including frame and walking drive mechanism, operation execution mechanism and intelligent sensing and control system installed on frame;The walking drive mechanism includes walking wheel installed on the bottom of frame and driven by motor, realizes self-propelled field operation of whole machine;The operation execution mechanism includes sprout clamping device, needle belt and sprout pulling device sequentially arranged from front to back along the operation direction of frame;The application constructs an intelligent garlic sprout harvesting scheme by machine vision, multi-sensor fusion technology and bionic mechanical structure design, which integrates separating grass, clamping, skinning, pulling and collecting, realizes whole-process automation control from garlic sprout identification, posture righting, skinning loosening, flexible pulling to conveying and collecting, meets the efficient, low-loss, precision harvesting demand in garlic planting scene.

The present invention provides a synthetic quartz glass tube for ultraviolet rays, the OH group concentration of the synthetic quartz glass tube being 5-500 wt. Ppm, and in the OH group concentration distribution in the thickness direction of the tube wall of the synthetic quartz glass tube, the position at which the OH group concentration is maximum is present in the range between the outer surface of the synthetic quartz glass tube and the position at a depth of 2 / 3 from the outer surface. When the OH group concentration in the inner surface portion of the synthetic quartz glass tube is A [wt. Ppm], the maximum OH group concentration is B [wt. Ppm], and the OH group concentration in the outer surface portion of the synthetic quartz glass tube is C [wt. Ppm], the OH group concentrations A, B, and C satisfy the following formulae (1) and (2). As a result, it is possible to provide: a synthetic quartz glass tube for ultraviolet light in which the occurrence of strain when irradiated with ultraviolet light is suppressed; and a method for producing the synthetic quartz glass tube. B > = C > A... Formula (1) B-A > = 20 [wt. Ppm]... Formula (2)