45results about How to "Play the role of axial limit" patented technology

The invention discloses a tool positioning-clamping mechanism for a milling machine, which comprises a tool (1), a tool shank (3) and a pull bar (4). The tool shank (3) is partially contained in a machine spindle (5) and fixed to the same, the tool shank (3) is provided with a center hole (3.1), the tool (1) is nested into the center hole (3.1), the pull bar (4) is contained in the center hole (3.1), one end of the pull bar (4) is connected with the tool shank (3) and axially limited, the other end of the pull bar (4) is fixedly connected with the tool (1), and accordingly the tool (1) is fixedly connected with the machine spindle (5). The connection way is higher in connection rigidity than the original Morse taper connection way, connection is more stable, and clamping is better. When the machine spindle is in high-speed rotation, the tool is more stable in rotation and less apt to fall from the spindle, and safety factor is higher.

The invention belongs to the technical field of plate turnover machines, and particularly relates to a plate turnover machine. The plate turnover machine comprises a base, a rotating support is arranged on the base, a horizontal rotating mechanism is arranged between the rotating support and the base, the rotating support comprises two symmetrically-arranged supporting rings, a rectangular supporting frame is arranged in each supporting ring, and an upper pedestal and a lower pedestal are arranged between the two supporting rings. By arranging the horizontal rotating mechanism and a turnover clamping mechanism, a plate located in a feeding channel can be clamped firstly, an upper conveying table is always in a horizontal state in the lifting process, it is ensured that angle deflection cannot occur, the clamping precision is high, the horizontal rotating mechanism is started after the plate is clamped, the rotating support is driven to turn over through the horizontal rotating mechanism, 180-degree turning over of plates is achieved, manual conveying and turning over of the plates are not needed, the automation degree and the working efficiency are high, and the labor intensity of workers is greatly reduced.

The invention discloses an electronic expansion valve, and belongs to the technical field of expansion valves. The electronic expansion valve comprises a valve seat and a sleeve, wherein the valve seat is arranged on a valve body, and the sleeve is fixed on the valve seat; a first channel and a second channel are formed in the valve body, and the valve seat is provided with a circulation channel located between the first channel and the second channel and a valve port; a valve needle and a rotor assembly used for driving the valve needle to move back and forth are arranged in the sleeve, a guide hole matched with the valve needle is formed in the valve seat, and the valve needle is opened or closed when the valve needle moves back and forth along the guide hole; and an upper valve cavity communicating with the interior of the sleeve is arranged on one side of the valve seat, a lower valve cavity communicating with the second channel is arranged on other side of the valve seat, and a balance hole for communicating the upper valve cavity with the lower valve cavity is formed between the upper valve cavity and the lower valve cavity. According to the electronic expansion valve, the balance hole for communicating the upper valve cavity with the lower valve cavity is formed; and under the action of the balance hole, the pressure in the upper valve cavity and the pressure in the lower valve cavity are consistent, and the pressure difference formed by the upper valve cavity and the first channel on the valve needle and the pressure difference formed by the first channel and the lower valve cavity on the valve needle are counteracted by each other.

The invention discloses an engine bearing bush mounting and dismounting tool, and belongs to the field of engine assembly. The engine bearing bush mounting and dismounting tool comprises a tool body. The two ends of the tool body are a dismounting end and a mounting end respectively, and the mounting end sequentially comprises a guide journal and a bearing bush matching journal in the direction away from the dismounting end. The diameter of the guide journal is larger than that of the bearing bush matching journal, the bearing bush matching journal is used for sleeving two half bushes of a bearing bush, and a step surface between the guide journal and the bearing bush matching journal is a bearing bush thrust surface. A guide ring can be hooped on the peripheries of the two half bushes and can provide radial limiting for the bearing bush in the mounting process, so that the two half bushes are prevented from radial deformation or radial displacement. In addition, the guide ring can axially move along the guide journal in the press-fitting process so as to play an axial limiting role in mounting of the bearing bush and determine the press-in amount of the bearing bush pressed into a bearing seat. The engine bearing bush mounting and dismounting tool is simple in structure and low in manufacturing cost, and the assembly precision is easy to guarantee.

The invention discloses a capacity-expandable cable pipe-penetrating protector, and belongs to the technical field of cable protectors. The capacity-expandable cable pipe-penetrating protector comprises a pipe penetrating protector body, the pipe penetrating protector body comprises a first half pipe body and a second half pipe body, which are oppositely arranged and can move relatively. Semicircular bearings are arranged in front of the first half pipe body and the second half pipe body; a plurality of first rollers penetrate through the bearings, a capacity-expandable structure is arrangedbetween the first half pipe body and the second half pipe body, the pipe-penetrating protector further comprises a limiting locking piece for locking the pipe-penetrating protector at a certain position, and the pipe-penetrating protector in the scheme is high in universality, wide in application range and high in installation efficiency.

The invention discloses a machining method for the grooving of a shaft workpiece. A machining device comprises a main shaft; the main shaft is provided with a hydraulic three-jaw clamping disc; the hydraulic three-jaw clamping disc is connected with three clamping jaws; the hydraulic three-jaw clamping disc is coaxially and fixedly connected with a fixing base; the fixing base is provided with mounting grooves corresponding to the three clamping jaws in a one-to-one mode; a pressing cushion block is arranged in each of the mounting grooves; and the fixing base is further fixedly connected witha directional limiting block. According to the machining method for the grooving of the shaft workpiece, the hydraulic three-jaw clamping disc and as corresponding tool clamp are used for clamping shaft workpieces to be machined, and the grooving of the three shaft workpieces can be machined every time clamping is conducted, so that the machining efficiency is greatly improved; and during machining, the hydraulic three-jaw clamping disc is driven by the main shaft to rotate, and cutters only need to conduct corresponding feeding movement, so that the machining precision is high, the machiningefficiency is greatly improved, and the consistency of product processing is good.

The invention discloses a multi-size screwdriver bit. At least two layers of screwdriver bit rods are sleeved with each other, and the screwdriver bit rods with different sizes correspond to screws with different specifications; the screwdriver bit rod located on the inner layer can slide in the axial direction; the connecting end of the screwdriver bit rod on the outermost layer is fixedly connected to a power rod; limiting holes are correspondingly formed in the side walls of all layers of screwdriver bit rods in a penetrating mode; when the limiting holes are aligned, limiting rods can be axially inserted, and the axial limiting effect on all layers of screwdriver bit rods is achieved; according to different insertion depths of the limiting rods, the screwdriver bit rods with different sizes can be moved out in the axial direction, and the screwdriver bit rods closer to the outer side can be moved out when the lengths of the limiting rods pulled out outwards are longer; and when the screwdriver bit rods with proper sizes are moved out, all layers of screwdriver bit rods synchronously rotate in the circumferential direction and are matched with screw heads for screwing operation. The multi-size screwdriver bit can be applied to screws with different specifications, and the size application range of the screwdriver bit is widened.

The invention discloses a bearing seat balance structure. The structure comprises a rotating shaft which is internally rotationally connected with a bearing seat, wherein the rotating shaft protrudes out of the bearing seat to form a balance section; a balance sleeve is connected onto the balance section; an end surface plate capable of limiting the balance sleeve in the axial direction is fixed on the end surface of the balance section through screws; an annular balance sleeve seat is arranged on the balance sleeve in the radial direction; the balance sleeve seat comprises an annular boss which extends inwardly and is located between the balance sleeve and the end surface plate; a gap of 10 mm is reserved between the balance sleeve seat and the balance sleeve; a gap of 5 mm is reserved between the annular boss and the balance sleeve. As the rotating shaft protrudes out of the bearing seat to form the balance section, load on the two sides of the bearing seat can be balanced and the problem of abrasion caused by uneven stress is solved.

A hub motor rotor dismounting tool is characterized in that a base plate is mounted on a base, and a sliding guide mechanism and a rotating mechanism are mounted on the base plate; a base is arranged in the center of the bottom plate; a sliding plate is mounted at the top of the rotor; a guide sleeve is arranged on the bottom plate; the lower part of the guide rail is arranged in the guide sleeve; the upper part of the guide rail penetrates through the sliding plate; the lead screw seat is arranged in the center of the sliding plate; the lower part of the lead screw is movably connected with the lead screw seat; the upper part of the screw penetrates through the center of the top plate; the top cover is arranged at the upper end of the lead screw; a connecting plate is arranged in the top cover, and the free end of the connecting plate is sleeved with a sleeve. The device is high in self-locking performance, the disassembly and assembly efficiency is improved, the guide rail and the lead screw are positioned in a high-precision mode, and the disassembly and assembly process is stable and safe.

The invention provides a round tube segmenting machine. A base is provided with a round tube fixing device and a segmenting device. The round tube fixing device comprises a limiting groove formed in the axial direction of a round tube. One end of the limiting groove is provided with a vertical supporting plate. The face, opposite to the limiting groove, of the supporting plate is provided with a round limiting boss. The other face of the supporting plate is provided with a hinge wheel. A pressing plate is hinged to the portion, located above the limiting boss, of the supporting plate. A stay wire is fixed to the pressing plate. The stay wire penetrates through a fixed pulley located at the upper portion of the supporting plate. The tail end of the stay wire is wound around the hinge wheel. The segmenting device comprises a horizontal rotary shaft. The rotary shaft is in key connection with cutting wheels. Cutting grooves are formed in the groove wall of the limiting groove. The effective cutting edges of the cutting wheels penetrate through the cutting grooves. The round tube can be effectively fixed through the round tube fixing device, and the round tube can be segmented through the segmenting device. The round tube is manually rotated, the round tube can be segmented under the condition that the cutting wheels are not moved, the section is smooth, and cutting accuracy is high.

The invention provides an anti-peeping device for video monitoring. The anti-peeping device comprises a mounting cover; a positioning cover fixed in the mounting cover, wherein the positioning cover comprises a circular cover body, and fixing nuts are fixedly arranged on the two sides of the circular cover body; a rotating piece, wherein the rotating piece is arranged in the circular cover body, a connecting piece is arranged on the rotating piece, a connecting arm and two locking mechanisms are fixedly connected to the top of the connecting piece, and the two locking mechanisms are arranged on the two sides of the positioning cover respectively. According to the anti-peeping device for video monitoring provided by the invention, the monitoring equipment is positioned through a positioning piece, and the two locking mechanisms are matched to lock the rotating block connected with the positioning piece, so that an effect of axially limiting the monitoring equipment can be achieved, illegal persons can be prevented from adjusting the angle of the monitoring equipment to peep, and the use of the monitoring equipment is safer.