30results about How to "Improve mechanical connection strength" patented technology

The invention discloses a modular power supply pin structure, which includes a perforated pin, a surface mount pin and a high temperature resistant insulating part, and is characterized in that the insulating part combines the perforated pin, surface mounted tube The pins are positioned according to the definition of the industrial standard pins of the module power supply to obtain the pin structure of the module power supply. The modular power supply pin structure of the present invention has the advantages of both fully separated perforated pins and full surface mount tube pins, and overcomes the disadvantages of both. Power supply input and output pins adopt perforated pins, which have good overcurrent capability and strong mechanical connection strength; auxiliary function pins adopt surface mount pins and occupy less printed circuit board resources; surface mount pins after plastic packaging Combined with perforated pins, the mechanical strength is enhanced. Combined with the production process of the module power supply, the module power supply pin structure 100 can be produced by the SMT process to improve production efficiency.

The invention relates to a machining method of carbon-fiber composite material plate connecting holes. The machining method comprises the following steps that 1, the basic diameter of the connecting holes and the deformation amount in the hole depth direction are calculated; 2, the connecting holes are machined according to the basic diameter of the connecting holes and the deformation amount in the hole depth direction; and 3, a structural adhesive is coated on the periphery of each connecting hole and cured at room temperature. Compared with the prior art, the connection holes obtained through the machining method greatly improves the connection strength under the premise of meeting the relevant technical requirements, reduces the stress concentration in the peripheral area of the connection holes, reduces the risk of cracking or layering failure of the carbon-fiber composite material in the area and delays the time for hole peripheral layering failure, so that the connection strength of the carbon-fiber composite material parts with the connecting holes is improved, and the service life is prolonged.

The invention, which belongs to the field of the voltage output type annular shearing type piezoelectric vibration sensor, relates to an annular shearing piezoelectric assembly structure with a built-in amplification circuit, thereby realizing reliable mechanical and electrical connection between a built-in charge amplifying circuit board and the piezoelectric assembly based on the annular shearing type piezoelectric assembly. A pedestal is designed to have a truncated-cone stepped circular ring structure; nested fixed connection between a stepped circular ring structure of a mass block and the built-in charge amplifying circuit board is realized by connection and fixation between internal and external cylindrical electrode surfaces of a piezoelectric element and the mass block; and for signal transmission, lead-free connection is realized by the electrode plane of the built-in charge amplifying circuit board. According to the invention, with the annular shearing piezoelectric assembly structure, engineering application problems of low shear structure strength, poor vibration stability, and poor lead reliability and the like are solved; the resonance frequency, reliability, structural strength of the mechanical structure are enhanced; the frequency response range of the piezoelectric assembly is extended; the anti-large-order non-destructive capability is improved; and large-order or resonance-band relative displacement of the built-in charge amplifying circuit board and the mass block as well as lead swinging at a low-order harmonic frequency point is eliminated.

The invention relates to the technical field of lip and air inlet assembly, and discloses a composite material lip and air inlet gluing mixed assembly method, the composite material lip and the composite material air inlet are aligned with the aerodynamic surface of the inner cavity It is connected as a whole by the composite material connecting piece arranged on the outer ring; the composite material lip is connected with the composite material connecting piece through normal temperature glue and countersunk rivets at the same time, and the composite material inlet is simultaneously passed through normal temperature glue and countersunk head Rivets are connected to composite connectors. The glue-rivet mixed assembly method of the present invention adopts the combination of glue joint and rivet joint to ensure the high mechanical connection strength of the butt joint assembly of the composite material lip and the composite material inlet port, and at the same time make the surface of the aerodynamic surface of the inner cavity after the connection Significantly improved quality with reduced butt joints and steps at butt sections.

The present invention provides a connector assembly, including a first connector and a second connector; the first connector includes a first body, and the first body is provided with a first terminal; the second connector It comprises a second body, the second body is provided with a second terminal, the second terminal is bent to form a holding part, and the first terminal is fixed with the holding part. The present invention also provides a terminal device including the connector assembly. In the solution of the present invention, the first terminal is held by the holding portion. Compared with the terminal contact of the conventional connector, the contact area is increased, so that the mechanical connection strength is greater and the connection is more stable, thereby making the connector more stable. The components are not easily loosened, thereby ensuring the stability of the electrical connection.

A wire crimp-on terminal (14) comprising a crimp-on terminal main body made of an electrically conductive material and a wing section (108) extending from two opposite sides of a rear-section of the crimp-on terminal main body, for use in crimping a wire onto the rear-section of the main body. The crimp-on terminal main body comprises a crimp-on terminal first layer (102) and a crimp-on terminal second layer (103). The crimp-on terminal first layer (102) and the crimp-on terminal second layer (103) are fittingly arranged. The wing section (108) is provided with a front end (108a) and a rear end (108b). The crimp-on terminal first layer (102) and the crimp-on terminal second layer (103) start to extent overlappingly forwards from at least the front end (108a) of the wing section. The crimp-on terminal solves the problem of excessive heat being generated at the front-section of the crimp-on terminal main body when electricity is applied, and enhances the strength of a mechanical connection between a wire crimp-on area and a transition area of the crimp-on terminal.

The invention relates to a three-dimensional braided composite material transmission tower and a preparation method thereof. Various fibers are mixed to form three-dimensional braided fabric, and according to the preparation method of the three-dimensional braided tower, flange connecting pieces and tower composite material structures can be integrally formed in a seamless mode. Rod pieces, on a tower head, a tower body, tower legs and other portions, of different types are transited to preparation of a hybrid fiber braised structure of outer layer carbon fiber three-dimensional fabric through core glass fiber three-dimensional fabric, and carbon fiber zero-degree yarn is adopted at the center of the core glass fiber fabric to serve as a framework. Meanwhile, the rod pieces of the three-dimensional braided composite material tower are connected through flange structures (an embedded metal flange framework) braided by tower rod end integrated hybrid fibers (mixing of carbon fibers and glass fibers), and the tower legs and a shoe plank for connection of a ground-based foundation are of a full carbon fiber three-dimensional braided structure. By means of the method, three-dimensional braided composite material transmission tower parts with composite material flange connection structures can be prepared and are suitable for assembly application of transmission towers of various types.

The invention provides a force measuring sensor, which includes a pressure head, a base, a sensitive element, a circuit board seat, a lead wire fixing circuit board, a multifunctional circuit board, a lead wire, a conductive column, a wire and a shell. The circuit board seat is made of stainless steel, and it is copper-plated or gold-plated. It is welded on the sensitive element by laser welding or electron beam welding. The lead wire is fixed. The circuit board is directly welded and fixed on the other side of the circuit board seat by solder or high-temperature solder. The fixed circuit board and the multi-function circuit board are connected and fixed through conductive posts. The invention can be used in extremely harsh working environments such as ultra-high or ultra-low temperature, severe impact, vibration, etc., and can solve the problem of high-precision force measurement in special environments requiring no organic matter and various adhesive structures. It has very practical significance for solving high-precision force measurement problems in complex industrial environments, military equipment, and aerospace and navigation environments.

The invention provides a circuit board module and electronic equipment. The circuit board module comprises two circuit boards and a circuit connection board, wherein the two circuit boards are arranged opposite to each other, the circuit connection board is arranged between the two circuit boards and is connected with the two circuit boards, a first engagement structure is arranged on a connectionsurface, connected with each circuit board, on the circuit connection board, a second engagement structure is arranged on a connection surface, connected with the circuit connection board, on the circuit board, and the first engagement structure and the second engagement structure are connected in a matching way when the circuit connection board is connected with the circuit boards. The circuit connection board and the circuit boards can be limited and fixed by connection of the first engagement structure and the second engagement structure in a matching way, the displacement quantity of relative motion between the circuit connection board and the circuit boards is limited, and the mechanical connection strength of the circuit board module is improved.

The invention provides a gap switch parallel control type high-strength metal oxide lightning arrester. The lightning arrester comprises unit sections which are sequentially connected in series in a vertical direction, wherein each unit section comprises an external insulation sleeve and a metal oxide resistance sheet, the metal oxide resistance sheet is arranged in the insulation sleeve, two ends of a bottom unit section of the lightning arrester are connected in parallel with a control unit, the control unit comprises a controller as well as a gap and a rapid switch which are mutually parallel, the rapid switch and the gap are both connected with the controller, the controller is used for detecting voltages of two ends of the lightning arrester and simultaneously triggering the gap to be conducted and the rapid switch to be switched on according to the detected voltage values, and the bottom unit section is short-circuited when the gap is conducted or the rapid switch is switched on. With the lightning arrester provided by the invention, the residual voltage of the lightning arrester can be reduced on the basis of maintaining a performance parameter of the metal oxide resistance sheet for an existing lightning arrester unchanged, and the protection level of the lightning arrester is improved.