37results about How to "Simple limit structure" patented technology

The invention relates to the field of experimental equipment and in particular provides a test tube fixation frame. The test tube fixation frame comprises vertically arranged vertical plates, whereinfixed plates used for being inserted by test tubes to fix the test tubes and supporting plates used for supporting the bottom of the test tubes are sequentially arranged from top to bottom among the vertical plates, more than two slots are formed in the vertical plates at intervals along the vertical direction, each slot is provided with a slot wall used for supporting the supporting plates and / orfixed plates which are inserted into the slots and connected among the vertical plates, and the slots are extended and arranged along the horizontal direction; and limiting structures used for limiting displacement of the supporting plates and / or fixed plates along the slot arrangement direction are arranged at the two ends of each slot. The limiting structures can guarantee that the supporting plates and / or fixed plates cannot move in the slots in an experiment process, so that fixation is realized; meanwhile, spaces between the supporting plates and the fixed plates can be changed by virtueof the supporting plates and / or fixed plates inserted into different slots, so that the test tubes in different specifications are adapted, and applicability is relatively high.

The invention relates to a ball valve. The bottom limiting ball valve comprises a valve body, an open valve ball cavity in the upper end of the valve body, a valve ball arranged on the valve ball cavity and a sealing ring for being in contact with the valve body and the valve ball to realize limiting and sealing. The valve ball and the sealing ring are arranged from the upper portion of the valveball cavity, and the center position of the valve ball is limited through a valve cover. A convex pin part is arranged at the bottom of the valve body, and the convex pin part is positioned at the non-axial position of the valve ball cavity. According to the bottom limiting ball valve, the novel inner limiting structure is provided for an upper-mounted ball valve, the structure is not limited by an outer structure of the valve body, the appearance design is more concise, and the bottom limiting ball valve is more suitable for open-mounted occasions, flexible in limiting and accurate in positioning and has the uniqueness and competitiveness of a market structure.

The invention discloses a flow-through contact stop device in a mobile connection structure. The flow-through contact stop device comprises a tooth bar, a transmission gearshaft, a ball bearing, a support ring, a contact seat, a flow-through conductor, a stop guiding sleeve and a flow-through contact, wherein the flow-through contact between the flow-through conductor and the contact seat for supporting the contact avoid the moving track of the gearshaft, the stop device of the flow-through contact is assembled in a groove for installing the flow-through contact in the contact seat for supporting the flow-through conductor and the transmission gearshaft and used for fixing an original assembly position of the flow-through conductor. In long-time operation of equipment, the flow-through contact moves for multiple times, and display of the position of the flow-through contact assembled between the flow-through conductor and the contact seat for supporting the flow-through conductor and the transmission gearshaft can be prevented. The flow-through contact stop device in the mobile connection structure ensures reliable contact between the flow-through contact and the flow-through conductor and product flow-through reliability, and is essential for long-time reliable operation of equipment.

The invention discloses an electromagnetic relay, which comprises a base, a magnetic circuit part, a contact part and a push clamp, an armature of the magnetic circuit part is arranged on the base in a swinging manner, the contact part comprises a movable spring part with a movable contact and a static spring part with a static contact, and the movable spring part and the static spring part are respectively arranged on the base; the electromagnetic relay further comprises an elastic piece, the armature is matched with the movable spring part through the elastic piece and the pushing card, when the armature moves in the attraction direction, the movable spring part is driven to act through the elastic piece and the push clamp, and in an overtravel stage of the armature, the elastic piece elastically deforms. According to the invention, the contact overtravel and the contact pressure can be realized under the assistance of the elastic deformation of the elastic piece, so that on the one hand, the static spring part can be made to be rigid and does not need to be made to be flexible for realizing the contact overtravel, and the anti-drop impact performance of the relay is improved; and on the other hand, the problem that the armature cannot be attracted in place after the current-carrying capacity of the product is improved is solved.

The invention discloses a tire locking device used on a vehicle maintenance scissor lift, and relates to the technical field of vehicle maintenance. The present invention includes a first locking assembly and a second locking assembly that are installed in cooperation with each other; the first locking assembly includes a rectangular frame with one end open, and a number of casters are symmetrically arranged on the frame plates on both sides of the bottom side of the rectangular frame , the rectangular frame is provided with a number of limiting plates; one end of the upper surface of the rectangular frame is symmetrically provided with two uprights, and a set of fixed shafts with a first roller is fixed between the two uprights; the second locking assembly includes a A horizontal bar, two pillars are arranged symmetrically at both ends on one surface of the crossbar, and a rotating shaft is installed between the two pillars, and a second roller is sheathed and rotated on the rotating shaft; the tire locking device also includes a fixed pin. The present invention solves the existing problem that the wheels tend to roll when repairing cars through the tire locking device composed of the first locking assembly, the second locking assembly and the fixed pin.

The invention relates to an incomplete-teeth worm and gear reducer with limit, which comprises a substrate (1), the substrate (1) consists of a shaft housing (1.1) and a seat ring (1.2) connected together with the shaft housing (1.1), a worm (2) is arranged in the shaft housing (1.1), the seat ring (1.2) is internally provided with an output shaft (5) in a penetrating manner, the output shaft (5) is provided with a revolving worm gear (3) which is meshed with the worm (2), the revolving worm gear (3) is an incomplete-teeth worm gear, and a check block (6) is fixedly arranged on the seat ring (1.2) of the substrate (1) and positioned at non-tooth positions of the incomplete-teeth worm gear. The incomplete-teeth worm and gear reducer is simple in limiting structure, and low in design and manufacturing cost, and can effectively realize the intersection angle of a solar tracking system.

The invention discloses a structure for selecting a rotation angle by a shifting fork for a worm gear-worm reducer. The structure comprises a base, a complete-tooth worm gear, an incomplete-tooth worm gear, a worm and the shifting fork, wherein the complete-tooth worm gear and the incomplete-tooth worm gear are respectively connected to a shaft I and a shaft II; the shaft I and the shaft II are both mounted on the base via bearings; the tail end of the worm is connected to the shifting fork; the initial end of the worm is arranged between the complete-tooth worm gear and the incomplete-tooth worm gear; the complete-tooth worm gear and the incomplete-tooth worm gear are symmetrically distributed at two sides of the worm; and the shifting fork is arranged on a sliding groove and moves upwards and downwards under the action of a driving mechanism. According to the invention, the complete-tooth worm gear and the incomplete-tooth worm gear are both arranged on the worm gear-worm reducer, and the adopted shifting fork moves upwards and downwards to enable the worm to choose to be meshed with any one of the complete-tooth worm gear and the incomplete-tooth worm gear, so that the change of the rotation angle of the worm gear-worm reducer is realized, and the universality is good; and a difference between the complete-tooth worm gear and the incomplete-tooth worm gear is that whether a stopping sheet exists, so that the cost input is low.

The present invention relates to unilateral synchronizers. It includes a gear hub and a slider installed in the slider slot of the gear hub. The gear hub has a left end face, a right end face and an inner arc surface. The slider slot is clamped with a limit block, and the limit block is made of plastic. forming, which closes one end of the slider slot. On the premise of ensuring the reliable position limit of the synchronizer slide block, the invention has the advantages of simple block position limit structure and low cost.

The invention provides a juicer with a reliable structure. The juicer comprises a machine base, a juice collection container connected to the machine base, an extrusion screw rod longitudinally disposed in the juice collection container, and an upper cover which covers an upper port of the juice collection container, wherein an opening and a feeding channel communicating with the opening are formed in the upper cover; a rotary feeding device is disposed on the upper end of the extrusion screw rod; the rotary feeding device and the extrusion screw rod form an integral manner; the extrusion screw rod drives the rotary feeding device to move; the rotary feeding device comprises a feeding hole and a discharge hole; the feeding hole and the opening are disposed correspondingly; a circumferential limiting structure is disposed on the upper cover; a positioning structure is disposed circumferentially on the rotary feeding device; and the circumferential limiting structure is coordinated withthe positioning structure to conduct circumferential limiting of the extrusion screw rod. Through coordination of the limiting structure and the positioning structure, assembly accuracy of the rotaryfeeding device, the extrusion screw rod and the juice collection container can be further increased; and reliability of transmission can be ensured.

The invention discloses a full-circle inverted buckle demolding sliding block structure, and aims to provide the full-circle inverted buckle demolding sliding block structure which improves the qualified rate of products, is high in reliability degree and comprises a sliding block, a supporting seat and a mold body, and the supporting seat is connected to the inner side of the sliding block and matched with the inner wall of a full-circle inverted buckle. An assembling space is formed between the inner wall of the sliding block and the outer wall of the supporting seat, the mold body comprises a plurality of mold bodies connected in the assembling space in a surrounding mode, the multiple mold bodies are connected in a surrounding mode to form a mold cavity used for injection molding of a full-circle inverted buckle, and the multiple mold bodies are elastically connected relative to the supporting seat. The plurality of mold bodies always have the trend of radial movement; during injection molding, the mold bodies are arranged in the assembling space, and the mold bodies are connected in a surrounding manner to form the mold cavity for injection molding of the full-circle inverted buckle; and when demolding is carried out after injection molding is completed, the mold bodies move in the radial direction relative to the outer wall of the full-circle inverted buckle so that the mold cavity can release the outer wall of the full-circle inverted buckle to complete demolding of the full-circle inverted buckle. The invention relates to the technical field of molds.

The invention discloses a double-turning indenter for display panel testing and a display panel testing fixture, which include a first turning component, a second turning component and a TP-FPC positioning component are arranged on the first turning component, the The flipping hinge on the first flipping assembly and the flipping hinge on the second flipping assembly are arranged perpendicular to each other, the second flipping assembly is provided with a TP-FPC conduction pressure head, and the TP-FPC positioning assembly is set A TP-FPC positioning groove is arranged on the top, and the position of the TP-FPC conduction pressure head corresponds to the position of the TP-FPC positioning groove. The present invention can effectively avoid the interference between the main FPC and the conduction pressure head when the display panel is installed, and it is convenient and quick to conduct on the display panel with the main FPC and TP-FPC bound at the same time and the projection of the main FPC and TP-FPC overlapping. TP‑FPC, to achieve rapid detection of TP‑FPC parts.

The invention provides a caliper tool, which includes two parallel four-bar linkages arranged along the left and right directions and assembled together. point line coincides, the line of two lower hinge points coincides, the symmetrical central plane of the two parallel four-bar linkages is perpendicular to the line of the upper hinge point, and the lower link of each parallel four-bar linkage is respectively provided with a The cylindrical surface of the radial dimension to be measured is pressed against the measuring rod. The two measuring rods are coaxially arranged and are respectively perpendicular to the symmetrical center plane. At least one measuring rod is correspondingly equipped with a dial indicator. The caliper tooling also includes a The synchronous adjustment mechanism is used to drive the two parallel four-bar linkage mechanisms to adjust to and from each other synchronously to ensure that the two measuring rods are always coaxially arranged. The use of two parallel four-bar linkages makes the caliper fixture simple in structure and reliable in action, which can effectively ensure the measurement accuracy of the caliper.

The invention relates to an unmanned aerial vehicle and its working method, comprising a fuselage of the aircraft, a plurality of support arms fixedly connected to the fuselage, and a propeller fixed on the upper end of the outer side of the support arm; The battery, the controller for controlling the operation of the aircraft; the foldable landing gear hinged with the support arm is arranged below the outer end of the support arm, and the landing gear includes a hollow main cylinder with a hole at one end, and a telescopic sleeve slidingly connected with the main cylinder. Rod, the inner wall of the main cylinder is radially symmetrically provided with two electrodes, the electrodes are electrically connected to the controller, the telescopic rod is made of conductive metal, when the telescopic rod shrinks into the main cylinder, the two electrodes pass through the telescopic rod Connection and conduction; the unmanned aerial vehicle controls the electrode on / off by moving the telescopic rod up / down during take-off and landing, and the controller controls the propeller to rotate or stop through the electrical signal introduced by the electrode. The response is sensitive and safe, and it can effectively avoid After the UAV landed, the propeller continued to rotate.

The invention discloses a double-turnover pressure head for display panel detection and a display panel detection jig. The double-turnover pressure head comprises a first overturning assembly, whereinthe first overturning assembly is provided with a second overturning assembly and a TP-FPC positioning assembly, an overturning hinge shaft on the first overturning assembly is perpendicular to an overturning hinge shaft on the second overturning assembly, the second overturning assembly is provided with a TP-FPC conduction pressure head, the TP-FPC positioning assembly is provided with a TP-FPCpositioning groove, and the TP-FPC conduction pressure head corresponds to the TP-FPC positioning groove in position. According to the invention, the interference between the main FPC and the conduction pressure head during the loading of a display panel can be effectively avoided; the TP-FPC on the display panel bound with the main FPC and the TP-FPC at the same time can be conveniently and rapidly conducted, wherein the projections of the main FPC and the TP-FPC are overlapped; and the rapid detection of the TP-FPC part can be realized.