33results about How to "Realize synchronous scaling" patented technology

The invention discloses a multifunctional lifting teaching blackboard, which comprises a base, a support column and a blackboard body; the support columns are symmetrically fixed on both sides of the base, the support columns include a first support column and a second support column, and the The support column is inserted in the first support column and can move up and down; a drive chamber is connected between the first support columns on both sides, and a transmission mechanism is provided in the drive room to drive the second support columns on both sides to move synchronously; the blackboard body The connecting block is fixed between the second connecting columns on both sides. The blackboard body is provided with a shielding sheet placement frame that can move in all directions, and the shielding sheet placement frame is made of transparent material; the bottom of the blackboard body is fixed with an ash collecting tank. The invention can realize the synchronous contraction of the supporting columns on both sides of the blackboard, and at the same time, it is provided with an ash collecting tank to protect the environment; it can also assist the memorization of English words.

The invention discloses a flexible holding tool for automobile stamping and welding production line parts and assemblies. The flexible holding tool comprises two parallel bearing beams, sliding rails are arranged between the two bearing beams, and at least two holding tool units are arranged on the sliding rails; the holding units comprise holding arm assemblies which are arranged on the sliding rails in a sliding fit mode; the holding arm assemblies comprise holding arms, connecting rods are arranged at the two ends of each holding arm, and supporting base assemblies are fixedly arranged on the connecting rods; the supporting base assemblies comprise supporting sleeves, sliding holes are formed in the supporting sleeves, a rail is arranged in each sliding hole, a telescopic cylinder is arranged on each rail in a sliding fit mode, and a telescopic driving mechanism is arranged on each supporting sleeve; a through hole is formed in each telescopic cylinder, a rotating shaft is arranged in each through hole, a positioning device is arranged at one end of each rotating shaft, and a switching motor used for driving the corresponding rotating shaft to rotate is arranged at the other end of each rotating shaft; each positioning device comprises a positioning block which synchronously rotates along with the corresponding rotating shaft, and at least two positioning piece mounting stations are annularly and uniformly distributed on each positioning block; the positioning piece mounting stations are detachably provided with positioning pieces used for being matched with a hoisted workpiece.

The invention relates to an inner support multistage electric cylinder, and belongs to the technical field of electric cylinder transmission. According to the inner support multistage electric cylinder, thrust can be directly transmitted to a gear box through lead screws in an inner support mode, and due to the fact that the force transmission link is reduced, the efficiency of a system is improved, and meanwhile the power density of the system is improved. According to the structure, by increasing the number of the sliding lead screws, a two-stage electric cylinder is changed into a three-stage or multistage electric cylinder. Synchronous stretching and retracting of a first-stage push rod and a second-stage push rod can be achieved, and the inner support multistage electric cylinder is suitable for an electric cylinder driven by a planetary roller lead screw and is also suitable for a multistage electric cylinder driven by a ball screw and a trapezoidal lead screw.

The invention provides a telescopic arm device and an automobile crane. The telescopic arm device comprises a first section arm, as well as a second section arm, a third section arm, a fourth section arm, a fifth section arm and a sixth section arm which are sequentially arranged in the first section arm in a sleeving manner, and further comprises a first telescopic cylinder, a first expansion arm wheel, a first expansion arm stay rope, a second telescopic cylinder, a second expansion arm wheel, a second expansion arm stay rope, a first contraction arm wheel and a first contraction arm guy rope, wherein a third telescopic arm wheel is mounted at the tail part of the fifth section arm; a fourth telescopic arm wheel is mounted at the root part of the sixth section arm; one end of the third telescopic arm stay rope is connected with the root part of the third section arm; the third telescopic arm wheel and the fourth telescopic arm wheel are sequentially arranged in the middle of the third telescopic arm stay rope in a surrounding manner; the other end of the third telescopic arm stay rope is connected with the tail part of the fifth section arm; a second contraction arm wheel is mounted at the tail part of the third section arm; a third contraction arm wheel is mounted at the root part of the fourth section arm; one end of a second contraction arm stay rope is connected with the root part of the fourth section arm; the second contraction arm wheel and the third contraction arm wheel are sequentially arranged in the middle of the second contraction arm stay rope in a surrounding manner; and the other end of the second contraction arm stay rope is connected with the sixth section arm. The telescopic arm device is compact in structure and easy to assemble.

The invention discloses a telescopic device of an arm frame. The arm frame comprises a first knuckle arm (1), a second knuckle arm (2) and a third knuckle arm (3); the telescopic device of the arm frame comprises multi-level telescopic hydraulic cylinders, a first guide pulley (10), a first guide element (11), a second guide pulley (18) and a second guide element (17), wherein the multi-level telescopic hydraulic cylinders is used for stretching the knuckle arms of the arm frame; the first guide element (11) is wound on the first guide pulley (10); the second guide element (17) is wound on the second guide pulley (18); in addition, the invention further discloses the arm frame and engineering machinery. According to the telescopic device of the arm frame, because the multi-level telescopic hydraulic cylinders are adopted to drive a plurality of knuckle arms simultaneously, and the guide pulleys and the guide elements enabling the telescopic speeds of the knuckle arms to be consistent are mounted on the knuckle arms, and the synchronization telescope of the knuckle arms of the arm frame can be achieved.

The invention relates to the field of refrigerator machining devices, in particular to a machining device for refrigerator sealing strips. The machining device comprises four installation molds and four connection rods. The installation molds are sequentially connected through the connection rods. Right-angle grooves are formed in the installation molds. The four connection rods are arranged in pairs in parallel and are telescopic connection rods. Each connection rod comprises two sections of connecting rods and a connection cylinder. The free ends of every two corresponding connecting rods are connected in a sleeving manner through the corresponding connection cylinder. An elastic piece is connected between the free ends of every two corresponding connecting rods. Telescopic transverse plates are connected between the connecting rods on the opposite sides. A sealing barrel communicates between the connection cylinders on the opposite sides. A connector is connected to the sealing barrel. The connection cylinders and the sealing barrel which communicate are filled with hydraulic oil. A threaded rod is connected in the connector in a threaded manner. The machining device for the refrigerator sealing strips aims at solving the problem that in an existing process, because when the refrigerator sealing strips are bonded, the regulation operation needs to be conducted two times and the regulation amounts need to be kept the same completely, operation is complex and tedious.