57results about "Mechanical devices for scotch-blocks" patented technology

The utility model discloses a safety hand-cranking mechanism for a point switch, which relates to the technical field of railway turnout switching equipment and comprises a fixing sleeve, a first bevel gear and a second bevel gear, two holes are arranged on the fixing sleeve, and the axes of the two holes are intersected; the end of the hand-cranking projecting shaft is located in one hole of the fixing sleeve, and the first bevel gear is arranged at the end of the hand-cranking projecting shaft; the other hole of the fixing sleeve is used for inserting the hand crank, and the second bevel gear is arranged at the end of the hand crank; the hand crank is inserted into the other hole of the fixing sleeve, so that the first bevel gear is meshed with the second bevel gear, and the switch machine is driven by rotating the hand crank; an identification ring is mounted in a hole, into which the hand crank is inserted, in the fixing sleeve; and an identification column is arranged on the hand crank in series with the second bevel gear. The included angle between the hand-cranking handle and the hand-cranking projecting shaft can be designed as required, so that the selection flexibility of the insertion position of the hand-cranking handle is greatly enhanced. Corresponding identification of the point switch and the hand crank is achieved, and safety is improved.

The invention discloses a safety hand-cranking mechanism for a switch machine, and relates to the technical field of railway turnout switching equipment, the safety hand-cranking mechanism comprises a fixing sleeve, a first bevel gear and a second bevel gear, the fixing sleeve is provided with two holes, and the axes of the two holes intersect; the end of the hand-cranking projecting shaft is located in one hole of the fixing sleeve, and the first bevel gear is arranged at the end of the hand-cranking projecting shaft; the other hole of the fixing sleeve is used for inserting the hand crank, and the second bevel gear is arranged at the end of the hand crank; the hand crank is inserted into the other hole of the fixing sleeve, so that the first bevel gear is meshed with the second bevel gear, and the switch machine is driven by rotating the hand crank; an identification ring is mounted in a hole, into which the hand crank is inserted, in the fixing sleeve; and an identification column is arranged on the hand crank in series with the second bevel gear. The included angle between the hand-cranking handle and the hand-cranking projecting shaft can be designed as required, so that the selection flexibility of the insertion position of the hand-cranking handle is greatly enhanced. Corresponding identification of the point switch and the hand crank is achieved, and safety is improved.

Method for monitoring a track switch with a switch drive, wherein the switch drive includes a housing, a switch setting motor arranged in the housing and a switch rod extending out of the housing for coupling to a track switch. The method includes providing a piezoelectric sensor arranged on the housing and detecting measurement signals of the piezoelectric sensor during a switching operation of the switch drive. Periodic components of the measurement signal are at least partially filtered out in order to obtain signal components representative of a non-periodic change in the strain of the housing. The method also includes evaluating a temporal progression of the signal components representative of the non-periodic change in strain in order to identify deviations from a nominal state.

The application discloses a switch machine and a moving plate set mechanism thereof, and belongs to the technical field of switch machines. The moving plate set mechanism comprises a moving plate, a quick-action sheet, a guide shaft and a compression spring. The moving plate adopts a long strip structure with a rolling plane at the upper part and climbing inclined surfaces at both ends. A fixed plate connected with a locking iron is arranged at the bottom of the moving plate, an axial through hole is formed in the center of the moving plate, two quick-action sheets, two guide shafts and a compression spring are arranged in the axial through hole, a guide hole for the compression spring to extend into is formed in the inner end of each of the two guide shafts, the two quick-action sheets are connected to the outer end of each of the two guide shafts, a limiting mechanism is further arranged at the two ends of the axial through hole, and the upper part of each of the quick-action sheets is protruded from the surface of the climbing inclined surface. The soft connection of the two quick-action sheets is realized by the assembly mode of the guide shaft and the compression spring, the parts are few, the mechanical structure is simple and easy to process, the assembly is simple, the integration degree is high, the axial movement of the quick-action sheet has the guiding self-adjusting function, the quick-action sheet is not prone to blockage, and each function of the moving plate set can be effectively realized.

This utility model discloses an intelligent storage box for turnout hand cranks, including an intelligent storage box body and a door hinged to one side of the intelligent storage box body. An electrical partition is fixedly connected to the inner wall of the intelligent storage box body, and a processing terminal is installed at the upper end of the electrical partition. Multiple sets of turnout hand cranks are installed on the mounting frame assembly, and each set of turnout hand cranks is equipped with an electronic tag. A communication module is used to establish a connection between the intelligent storage box and an external network, transmitting data such as the time the turnout hand cranks are taken, their storage status, and the time the electronic lock is unlocked to the station management cloud platform in real time. The station management cloud platform, as a cloud management platform, stores various information and operation records of the turnout hand cranks, providing an operation interface for relevant personnel such as the electrical section and the station dispatching department. It supports functions such as online application, authorization approval, status query, and historical record tracing, realizing remote intelligent management of the hand cranks.

The invention relates to a point switching device (1), comprising a slider (7) which is mounted so as to be moveable in the actuation direction (10) and which can be driven in the actuation direction (10) by a drive assembly (3), an actuating rod (9) which is mounted so as to be moveable in the actuation direction (10) between a first and a second actuation position and to which the slider (7) is drivingly coupled in the actuation direction (10) by means of a run-through coupling (8), and a blocking device (14, 15) for blocking the slider (7) in an end position region, wherein the run-through coupling (8) allows a shifting of the actuation rod (9) relative to the slider (7) in the event of a run-through, and a local maximum run-through force can be applied to the actuation rod (9) in the event of a run-though. The point switching device (1) has a position sensor which generates a switching signal in the event of a run-though before the maximum run-through force is reached.

Switch drive (3) for the switch (1) of a railway track, which is connected to switch blades (2) of the switch (1) for displacement into one of the end positions by means of an actuating rod (8) mounted axially displaceable perpendicular to the railway track, which can be positively locked in each of the end positions by means of a stationary blocking device (9). characterized by the fact that a locking block (12) is slidably mounted on the adjusting rod (8), but can be fixed via a drive coupling (13), that the locking block (12) is, on the one hand, for displacing the actuating rod (8) into one of its end positions via a gearbox (7.1,7.2) with an electrically operated drive motor (5) and, on the other hand, for axially fixing the actuating rod (8) in each of the end positions, can be positively connected to the stationary locking device (9), that the drive coupling (13) consists of two friction-fit locking pairs, • which locking pairs are located opposite each other on a guide track perpendicular to the axis of the adjusting rod (8), offset by 180° diametrically on both sides of the adjusting rod (8), • and each of which has a detent notch (13.5 or 13.6) provided on the circumference of the adjusting rod (8) and a detent element (13.1 or 13.2) which is movably mounted in the blocking block (12) perpendicular to the surface of the adjusting rod (8) and is pressed by spring force (pressure spring (13.12 or 13.13)) in the direction towards the surface of the adjusting rod (8) or detent notch (13.5 or 13.6) and interacts with the detent notch (13.5 or 13.6).

In a manual drive unit for a switch mechanism, including a drive-side connecting component 19 for connecting a hand crank 14, an output-side connecting component 16 for an input pinion 13 of a gear 4, and a flexible shaft 15 extending between the drive-side connecting component 19 and the output-side connecting component 16, which is rotatably connected to the drive-side connecting component 19 and has an end component 17 on the output side, at least a part of the drive-side connecting component 19, the flexible shaft 15, and the end component 17 are guided together so as to be displaceable longitudinally between a disengaged position and an engaged position, and the end component 17 is disengaged from the output-side connecting component 16 at the disengaged position and engages with the output-side connecting component 16 at the engaged position.

The invention relates to a railway switch having an actuating apparatus (AMSM) which is configured to actuate the railway switch via an actuating slider. The railway switch has a splitting mechanism with a spring element (FE) that is configured to protect the railway switch drive from damage after splitting via the actuating slider. The spring element (FE) comprises a structural unit or an assembly having a torsion spring (TF) and optionally a further torsion spring (WTF) and a bending spring (BF). The torsion spring (TF) and the bending spring (BF) are mechanically coupled to one another in a torsionally rigid manner such that a torque on account of a force being introduced into the bending spring (BF) in a manner perpendicular to the axis of rotation of the rotation spring is transmitted between the rotation spring and the bending spring (BF). The invention further comprises an actuating apparatus (AMSM) for a railway switch.

The present application relates to a connecting tab (1) for connecting two slide bar parts (2, 3) of a switch lock (10), wherein the connecting tab (1) has a first opening (11) for creating a positive-locking connection of the connecting tab (1) with one of the slide bar parts (2, 3). According to the invention, a first insert (20) can be received in the first opening (11) in a rotationally fixed manner in at least two different orientations by means of a positive lock, such that a connection distance (c) between the two slide bar parts (2, 3) can be adjusted. Furthermore, this application relates to a corresponding slide bar part (2, 3) of a switch lock (10) for connecting to a second slide bar part (3, 2) of the switch lock (10) by means of a connecting tab (1), an insert (20) for insertion into a connecting tab (1), and a first insert (20) for insertion into a connecting tab (1).a slide bar part and a switch lock (10) for closing two tongue rails of a tongue switch with such a connecting tab or a slide bar part.

A switching apparatus comprising a point detector connecting rod connected at one end to a switch machine and to at least one point at the opposite end. The point detector connecting rod is attached to the point via an angled block that permits a sliding motion relative to the point.

The utility model relates to the technical field of agricultural machinery transportation, in particular to an orbital transfer device of a greenhouse transport vehicle, which comprises a base plate, an orbital transfer sliding strip is in guide sliding fit with one side of the base plate, the orbital transfer device further comprises two orbital transfer chain links with the same distance, and the two ends of the two orbital transfer chain links are fixedly connected with the orbital transfer sliding strip and the other side of the base plate respectively. The connecting line of the two track transfer chain links and the fixed point position of the base plate is parallel to the track transfer sliding strip, each track transfer chain link comprises a plurality of track links which are sequentially inserted into and pulled out of the sliding sleeve, the two track links located at the end are connected with the base plate and the track transfer sliding strip respectively, and an outer guide sleeve and an inner guide sleeve which are integrally formed are arranged on each track link. According to the rail transfer sliding strip of the greenhouse transport vehicle, rail transfer can be conveniently and rapidly carried out, meanwhile, rail transfer can be conveniently and stably carried out on the greenhouse transport vehicle, and meanwhile the rail transfer sliding strip is simple in structure and low in material consumption.

The invention relates to a method for monitoring a track switch having a switch drive (1), the switch drive (1) comprising a housing (2), a switch actuating motor arranged in the housing (2), and an actuating lever (3) leading out of the housing (2) for coupling to the track switch, the method comprising: providing a piezoelectric sensor (6) arranged on the housing (2); detecting a measurement signal of the piezoelectric sensor (6) during an adjustment operation of the turnout driver (1), periodic components of the measurement signal being at least partially filtered out in order to obtain a signal component representing a non-periodic change in the strain of the housing (2); and evaluating the temporal progression of the signal component representing the non-periodic variation of the strain in order to identify a deviation from the target state.

A fixed turnout track (1) and a vehicle-mounted track change system. The fixed turnout track (1) comprises a turnout structure and a fork guide rail (11) for guiding a vehicle to pass through a fork, the fork guide rail (11) is arranged in a turnout structure, and the front part of the fork guide rail (11) projects beyond a track surface of the turnout structure. The vehicle-mounted track change system comprises the fixed turnout track (1) and a rail vehicle (2), the rail vehicle (2) is provided with a bogie (21), and the bogie (21) is provided with a track change device. When the rail vehicle (2) passes through the fork, by means of cooperation with the fork guide rail (11), the track change device guides the rail vehicle (2) to make track change to the left or to the right. The fixed turnout track (1) does not need a turnout switch, and is simple in structure, low in cost and convenient to form a rail transit network. The rail vehicle (2) of the vehicle-mounted track change system can be autonomously guided; the vehicle-mounted track change system is safe and reliable and is beneficial to popularization of novel rail transit.

The utility model discloses a rack type manual switch device. The switch device comprises a rack unit, a gear unit and a worm unit, the rack is used for acting under the driving of the gear so as to drive the switch rail to be far away from or close to the stock rail; the worm is used for driving the worm gear to rotate through external force provided by the wrench so that the worm gear can drive the gear to rotate. The switch device directly drives the switch rail to move through the gear-rack connecting rod, and the transmission structure is simple. Locking of the switch mechanism is achieved through a worm and gear structure, and an additional locking structure does not need to be provided. The gear-rack connecting rod, the worm gear and the worm can be assembled in the box body in advance, the structure is simple and compact, the occupied space is small, and on-site replacement is convenient.

The present disclosure relates to a tongue piston of a clamp lock for a switch operating system and to a clamp lock for a switch operating system with such a tongue piston.The tongue piston comprises a tongue block body with two vertically extending and adjacent webs which are connected to one another via a connecting region and form a receiving space between them for a fastening eye of a locking clip, wherein the tongue block body has a horizontal receiving slot in the connecting region for receiving a foot of an adjusting tongue and in the webs two receiving openings which are aligned horizontally with one another along an alignment direction for receiving an eccentric bolt, and wherein the tongue block has on at least one of the two webs at its receiving opening a recess which extends radially to the alignment direction and over part of the circumference of the receiving opening for partially receiving at least one flange of a fastening nut of the eccentric bolt.

The utility model discloses a parallel type track transfer travelling crane with a self-braking structure, which comprises a track main body, railway ballasts are arranged on the surface of the bottom of the track main body, a track transfer main body is arranged on the side edge of the track main body, and a transmission track is fixedly connected with the surface of the inner ring of the track transfer main body. According to the device, a first telescopic rod is arranged in an arranged switch shell, and after a user opens the first telescopic rod, the user can use and push a transmission rail, so that the user can use and push a rail transfer main body, and therefore, the user can conveniently transfer rails, brake is carried out when the user transfers the rails, and the operation is convenient. In the braking process, a user needs to open the second telescopic rod, the arranged brake pad pressing plate can be driven to be pushed after the second telescopic rod is started, and therefore the user can brake the transmission rail, and the user can brake the transmission rail in the rail transfer traveling process.

The application discloses a safety type hand pulling mechanism of a switch machine, which comprises a pulling stick, a handle spring seat, a handle shaft sleeve, a cam clutch plate, a clutch sliding block, a cam, a hand pulling main shaft and a terminal meshing gear; the pulling stick is fixedly connected with the handle spring seat; the handle shaft sleeve is located outside the handle spring seat and the clutch sliding block; the cam clutch plate and the cam are sequentially sleeved outside the hand pulling main shaft; the cam clutch plate is fixedly connected with the hand pulling main shaft; the cam is fixedly connected with a machine shell; the other end of the hand pulling main shaft is provided with the terminal meshing gear; the outer edge of the cam clutch plate is provided with a cam clutch plate clamping groove; the cam is provided with a cam sliding groove on the side close to the cam clutch plate; and the longitudinal section of the clutch sliding block is in a stepped shape. The application is used for the hand pulling mechanism of the electric switch machine special for train switching, adopts the pulling stick handle driving, realizes the clutch control through the cam insertion groove, simultaneously installs the end face cam travel switch, realizes the mechanical structure and the circuit double safety measures, and is high in reliability.

The utility model discloses a rotary turnout device which comprises an installation box, a base is installed on the inner bottom face of the installation box, a rotating shaft is installed on the upper portion of the base through a bearing, a through hole is formed in the upper portion of the installation box, one end of the rotating shaft penetrates through the through hole, and a control panel is installed on the outer wall of the installation box. A rotating disc is installed at the upper end of the rotating shaft, a guide rail plate is installed on the upper portion of the rotating disc, a filter box is installed on the lower portion of the mounting box, a gas storage box is installed on the lower portion of the filter box, a mounting plate is installed on the inner wall of the filter box, and a speed reduction self-locking motor is installed on the lower portion of the mounting plate; the output end of the speed reduction self-locking motor is sleeved with a gear. The rotary turnout device has the advantages that the filter box is adopted, the gear structure can be prevented from being contacted and adsorbed by foreign objects through the arranged filter box, meanwhile, a collecting structure is arranged, dripped gear oil can be collected, and the use practicability of the rotary turnout device is improved.

The invention relates to a rotatable point rail frog, which belongs to the technical field of railway traffic equipment and comprises a frog point rail, a sliding bed bedplate is arranged below the frog point rail, a toe end rail is arranged at one end of the frog point rail, a heel end rail is arranged at the other end of the frog point rail, and a rotating shaft is arranged at one end, close to the heel end rail, of the frog point rail. The fork point rail is rotationally connected with the sliding bed bedplate through a rotating shaft, and a switch machine for driving the fork point rail to rotate is further arranged on the sliding bed bedplate. The frog throat structure has the effects of reducing harmful space of a traditional frog throat and improving stability and safety.

The utility model discloses an automatic steering device for a fixed route railway turnout. The automatic steering device comprises a spring box, a switch rail connecting rod, a sliding rod, a spring and a hollow sleeve. The spring box is fixed beside the turnout; the switch rail connecting rod is connected with the switch rail and provided with an extending connecting part extending out of the turnout and connected with the sliding rod. One end of the sliding rod is connected with the extending connecting part, and the other end of the sliding rod is provided with a hollow sleeve; a stop block is fixedly arranged on the outer wall of the sliding rod located in the spring box and used for applying pressure to the spring. The spring sleeves the sliding rod and is located in the spring box, one end of the spring abuts against the stop block, and the spring is used for providing reset force for the switch rail after the vehicle passes through the spring; a protruding part located in the spring box is arranged in the middle of the hollow sleeve and located between the spring and the spring box, one end of the hollow sleeve stretches into the spring, and the other end of the hollow sleeve stretches out of the outer wall of the spring box. The device provided by the utility model can realize automatic instant steering of the turnout switch rail under the unmanned operation condition, meets the dumping operation of the car dumper, and is simple in structure, convenient to install and low in maintenance cost.

A device for adjusting a railway switch, in particular a device for manual two-stage control of a switchgear when manually adjusting a railway switch during emergency adjustment and when returning back to the central point adjustment, which includes an electromotive switch (2) with a switchgear (1), where the switchgear (1) includes a first shaft (5) and the electromotive switch (2) includes an electric motor (4) with a second shaft (8), where a latch (6) is mounted on the first shaft (5) of the switchgear (1), on which a gear-less mechanism (7) is mounted, where the latch (6) in the switched on state of the switchgear (1) covers the second shaft (8) of the electric motor (4) and prevents access to it, and where the latch (6) in the switched off state is tilted so that it ensures free access to the second shaft (8) of the electric motor (4) for inserting the hand crank (9).

The utility model discloses a horizontal linkage mechanism of a point switch contact group. The upper crank arm and the compensation crank arm are hinged to a main shaft and can swing synchronously, a main crank arm is hinged between one side of the upper end of the top of the Y-shaped arm and the upper portion of the upper crank arm, and a clearance compensation tension spring is hinged between the other side of the upper end of the top of the Y-shaped arm and the upper portion of the compensation crank arm. A Y-shaped arm tension spring nut is arranged on one side of the lower portion of the Y-shaped arm, and a main tension spring is connected to the Y-shaped arm tension spring nut. The utility model has the advantages that the purpose of eliminating the clearance of each transmission part is realized, the clearance can be effectively compensated through the compensation tension spring, the contact reliability of the contact is greatly improved, and the action accuracy of the contact group is ensured. Under the condition that the original linkage mode position and action mode are not changed, the reliability is higher, and the interchange problem of the oil-immersed contact assembly and the arrangement type contact assembly can be quickly completed; and the replacement and maintenance efficiency is greatly improved.

The invention relates to the technical field of sub-rail stalling, in particular to a rail transit passenger flow real-time prediction and passenger guidance system. According to the technical scheme, the device comprises a gear box, a rotating shaft and first meshing teeth, the rotating shaft extending to the outer side is rotationally installed in the gear box, the first meshing teeth are fixedly installed on the outer side of the rotating shaft, and first power teeth corresponding to the first meshing teeth are fixedly installed at the output end of a first motor; and a second power gear is fixedly mounted at the output end of the second motor. Through mutual cooperation of the first power teeth, the first meshing teeth and the second power teeth, the first meshing teeth and the rotating shaft can be driven by the first power teeth to rotate, and when the first power teeth are abraded due to long-time rotation, the second power teeth can move to be meshed with the second meshing teeth; and the second power teeth can drive the second meshing teeth and the rotating shaft to rotate synchronously, and the phenomenon that the rotating shaft does not rotate can be avoided.

The invention provides a railway turnout switching driving assembly, and belongs to the technical field of railway turnout switching, the railway turnout switching driving assembly comprises a first switch rail, a second switch rail, a driving block, a driving block driving mechanism, a first limiting block, a second limiting block and a limiting block lifting mechanism; the position of a driving block is adjusted through a driving block driving mechanism, the driving block drives a first connecting rod and a second connecting rod to move, then a first switch rail and a second switch rail can be driven to switch positions, and when the driving block moves, a first connecting square rod and a second connecting square rod can be connected with a first rotating column and a second rotating column at intervals; when the transmission rod rotates, the transmission rod drives the first rotating column and the second rotating column to rotate at intervals, so that the first limiting block and the second limiting block are driven to move upwards at intervals, the first switch rail or the second switch rail tightly attached to the fixed rail is limited and fixed, and the fixing effect is good.

Switch setting device (1) comprising a carriage (7) displaceable in the setting direction and driven by a drive unit in the setting direction, a connecting rod (9) displaceable in the setting direction between a first and a second setting position, with which the carriage is coupled in the setting direction by means of a drive coupling (8), and a locking device (14, 15) for locking the carriage in an end position area, wherein the drive coupling allows a displacement of the connecting rod relative to the carriage in the event of a collision and has a force-displacement characteristic for the dependence of a collision distance on the collision force acting on the connecting rod, wherein the force-displacement characteristic has a local maximum at a maximum transmissible collision force.The switch setting device has a position sensor which generates a switching signal depending on the approach path when a switching point (SP) is reached, and the force-displacement characteristic is flattened in the area (43) of the switching point (SP) when the target force is below the maximum approach force.

A drive unit having an actuating part 6 interacting with a moving part 7 mounted to be movable in an adjusting direction in order to move the moving part 7 in the adjusting direction, an adjusting rod 9 mounted to be movable in the adjusting direction between a first adjusting position and a second adjusting position, the moving part 7 being coupled for driving in the adjusting direction, preferably by a mounting clutch 8, also provided, two tester sliders 12, 13 extending parallel to the adjusting rod 9 and mounted to be movable in the adjusting direction between a first adjusting position and a second adjusting position, and locking sliders 14, 15 displaceable transversely with respect to the adjusting direction, in a point machine, each locking slider 14, 15 is moved by the action of a force to a first locking position at one of the adjusting positions, engages in recesses 16a, 16b of the moving part 7 in the first locking position, the moving part 7 having two movement transmission elements, preferably rocker arms 20a, 20b, arranged on the moving part 7, which are operable by the actuating part 6 and can convert at least part of the movement of the actuating part 6 into the movement of actuating members 19a, 19b displaceable in a first recess 16a and a second recess 16b in the moving part 7, the actuating members 19a, 19b being arranged in the locking position between the locking sliders 14, 15 and the adjusting rod 9 and engaging in recesses 18a, 18b in the adjusting rod 7 in the first locking position of the locking sliders 14, 15.

The utility model relates to the field of rail accessories, in particular to a protection device of a turnout switch, which is characterized by comprising a covering steel plate and a fixing steel plate, a horizontal steel plate is arranged in the middle of the covering steel plate, vertical steel plates are arranged at the left end and the right end of the covering steel plate, and the horizontal steel plate and the two vertical steel plates jointly define a protection inner cavity. The horizontal steel plate can be hinged to the fixed steel plate in an upward overturning and opening mode, a receding notch is formed in the middle of the bottom edge of the fixed steel plate, and at least one elastic downward pressing piece is arranged at the hinged position of the horizontal steel plate and the fixed steel plate. The elastic pressing piece can elastically press the horizontal steel plate downwards so that the rear ends of the horizontal steel plate and the two vertical steel plates can be tightly pressed at the front end of the fixed steel plate. According to the utility model, the interference of external interference factors such as stones, freezing rain, accumulated snow or hail on the movement of the draw bar shaft below the stock rail can be greatly reduced, the rail replacement can be kept at high speed and accuracy for a long time, the inspection and maintenance are convenient, and the potential safety hazard can be reduced.

The invention relates to a rotary pressing and locking structure and method for a railway machine cover, the rotary pressing and locking structure comprises a lock nose (6) matched with the machine cover and a lower lock catch (7) arranged on a bottom shell, and the rotary pressing and locking structure is characterized by further comprising a door holder (1), a mounting column (2), a locking nut (3), a mounting nut (4) and a rivet (5); the door holder (1) is provided with a Z-shaped section, one end of the door holder (1) is provided with a first hinge hole, and the other end of the door holder (1) is provided with an oblong hole and assembled with the cover lock nose (6); the mounting column (2) is of a stepped cylinder structure, a second hinge hole is formed in the small end of the mounting column, and the large end of the mounting column is contained in the cavity; under the condition that the rotating space is limited, the rotating and pressing actions of the machine cover lock catch are optimized, the contact area of machine cover locking is increased, a single thread screwing and pressing mode is changed into a buckling and pressing locking mode or a buckling and pressing screwing and locking mode, the sealing reliability is enhanced, and various requirements of on-site customers for the machine cover locking mode are met.