234 results about "Axial projection" patented technology

The invention relates to the technical field of axial flow fans, in particular to an impeller with S-shaped blades and an axial flow fan applying the impeller. On the axial projection of the impeller, the peripheral contour of each blade is defined by a blade root edge, a blade front edge, a blade outer edge and a blade rear edge, and the blade root edge is connected with the hub; the blade front edge and the blade rear edge are both wavy curves, and the blade root edge and the blade outer edge are both arc-shaped lines with the axis O of the hub as the circle center. Each blade is provided with a pressure face and a suction face, the pressure faces and the suction faces are oppositely arranged, and on the radial projection of the impeller, the pressure faces are arranged in a wave shape in a protruding mode from one end of the blade root edge to one end of the blade rear edge towards the suction faces and then concavely arranged, so that the blades are of an S-shaped structure. The problem that a traditional blade structure cannot meet the use requirements of high efficiency and low noise can be solved.

The embodiment of the invention provides a damping structure suitable for a pin for a steering wheel and an automobile steering wheel, the damping structure is installed and fixed on a supporting piece of any one of the steering wheel or a safety air bag module and used for attenuating vibration transmission between the pin and surrounding parts, and a sleeve is fixed at a through hole in the supporting piece. The elastic piece is fixed on the supporting piece and provided with a supporting leg which always moves from the position outside the axial projection area of the through hole to the position inside the axial projection area of the through hole under the elastic bias action of the supporting leg, the tail end of the pin is provided with a clamping groove, the supporting leg is elastically embedded into the clamping groove, and the pin is provided with a step part. A damping piece is arranged between the step part and the upper end face of the sleeve and abuts against the step part and the upper end face of the sleeve in an interference mode. The elastic piece and the damping piece are arranged, the supporting leg of the elastic piece is embedded into the clamping groove in the tail end of the pin, the damping piece abuts against the position, close to the upper end face of the sleeve, of the pin in an interference mode, the pin is fixed, and the stability of the pin after installation is guaranteed.

A drive for adjusting an adjustment element of a motor vehicle, the drive including a hollow cylinder, a rod guided axially therein, two articulated parts configured to provide linear drive movements to the motor vehicle and form a drive connection to the adjustment element and the rest of the motor vehicle. The one articulated part axially fixed to a first component of the components of the drive unit and the other articulated part axially fixed to a second component of the components of the drive unit in the installed state. The drive has a drive spring assembly including a drive spring acting on the articulated parts. In the installed state, at least one of the components of the drive unit is axially fixed to a securing element by a threaded connection, and the securing element projects radially into an axial projection of a spring material of the drive spring assembly.

Metering valve having a valve body (10) containing a metering chamber (20) defined by a chamber insert (40) and a top and a bottom seal. The chamber insert (40) has a cylindrical wall (49) with an upper edge (41) cooperating with the top seal and a lower edge (43) with the bottom seal. A valve shut-off element (30) slides between rest position and dispensing positions. The valve shut-off element is urged towards its rest position by a spring (8) cooperating with the valve body (10) and the valve shut-off element. The lower edge of the chamber insert forms a flange and has a downward axial projection (48). The bottom seal has an axial opening (225) accepting an axial projection (45) and passing through the axial opening. The rest position of the valve shut-off element is defined by contact between the axial projection and a part of the valve shut-off element.

The utility model discloses a high-pressure straight-through valve which comprises a valve body and a movable valve rod arranged in the valve body, first sealing pieces are arranged between the upper portion of the movable valve rod and a lining and between the lower end of the movable valve rod and the valve body respectively, and a first balance groove and a second balance groove are annularly formed in the position, between the two first sealing pieces, of the movable valve rod. Two stress surfaces which are oppositely arranged and have the same axial projection area are formed on the upper side surface of the first balance groove and the lower side surface of the second balance groove, and the axial projection areas of the two stress surfaces are the same. After the movable valve rod is sealed, high-pressure fluid can only act on the movable valve rod through the two stress faces, it is guaranteed that the pressure borne by the movable valve rod in the two directions is the same, the self-balancing effect is achieved, it is guaranteed that the movable valve rod is not affected by the pressure of the high-pressure fluid, and adaptability to the high-pressure fluid is higher.

The present invention discloses a Stirling refrigerator, comprising: a compression mechanism and an expansion mechanism of equal mass, the compression mechanism including a compression connecting rod assembly, which performs piston motion when the compression mechanism rotates, and the expansion mechanism including an expansion connecting rod assembly, which performs piston motion when the expansion mechanism rotates; a cam shaft driven to rotate by a motor, the compression connecting rod assembly and the expansion connecting rod assembly both being sleeved on the cam shaft and maintaining an axial projection angle of 90° on the cam shaft; the cam shaft including a recessed area arranged in the direction of the angular bisector extending from the axis of the compression mechanism and the axis of the expansion mechanism. The present invention designs the compression mechanism and the expansion mechanism to be structures of equal mass so that the direction of the resultant inertial force of the compression mechanism and the expansion mechanism remains unchanged during operation, and simultaneously provides a recessed area on the cam shaft to reduce the centrifugal force during the rotation of the cam shaft, thereby balancing the above-mentioned resultant inertial force, thereby achieving a dynamically balanced working state of the Stirling refrigerator.

This utility model relates to the field of agricultural machinery power output technology, and discloses a transmission device for an agricultural work machine, including a power unit and a transmission housing. The power unit is drively connected to the transmission housing. A clutch unit, supported by a power shaft and used to connect or disconnect power transmission, is disposed within the transmission housing. A maintenance port for maintaining the clutch unit is provided on the transmission housing, located on the radial projection side of the clutch unit and / or the axial projection side opposite to the power unit. This facilitates the inspection and maintenance of the clutch unit, allowing for quick disassembly, replacement, and installation.

The invention relates to a tank for storing and / or transporting a fluid and intended for a ship having a longitudinal direction (X), the tank comprising: · a column for loading / unloading the fluid, · a first sump (30) provided in a bottom wall (23), · a supporting foot (31) fixed in an area of the bottom wall, the column comprising at least three vertical masts (11, 12, 13), two of which are arranged in a first transverse plane (P1) orthogonal to the longitudinal direction (X), the masts (11, 12, 13) delimiting, by axial projection onto the bottom wall, a first perimeter, the column bearing a first pump (20) entirely arranged outside the first perimeter and extending into the first sump (30), the supporting foot (31) being arranged in a second transverse plane (P2), parallel to the first transverse plane (P1), the first pump (20) extending in a third transverse plane (P3), parallel to the first transverse plane (P1), the first transverse plane (P1) and the third transverse plane (P3) being situated one on each side of the second transverse plane (P2).

The application provides a centrifugal wind wheel, and belongs to the technical field of fan manufacturing. The centrifugal wind wheel solves the problems of small air volume and small static pressure of the existing centrifugal wind wheel. The centrifugal wind wheel comprises a front disc, a rear disc and a plurality of blades, the blades are circumferentially and uniformly fixed between the front disc and the rear disc, an air outlet is arranged between the front disc and the rear disc, the middle part of the front disc is provided with an air inlet coaxial with the front disc, the front disc is sequentially provided with a cylindrical surface section, an arc section one and an arc section two from the air inlet to the air outlet, the arc section one and the arc section two are both protruded to the rear disc side, the outer edge of the arc section two is lower than the arc body at the highest position of the arc section two, the axial projection of the rear disc is in a circular ring shape, the cross section of the rear disc is in an arc shape protruding to the direction away from the front disc side, the outer edge of the rear disc is perpendicular to the air outlet, and the axial height of the rear disc is 8%-12% of the outer diameter of the rear disc. The application can reduce flow passage loss, increase air volume and static pressure.

Steer-by-wire steering device (10; 10A; 10B; 10C) comprising: a first element (80, 80B, 80C) that rotates together with an input shaft (21) when a steering wheel (11) is turned, and that includes a first projection (82, 82B, 82C) that extends from the input shaft (21) in a radial direction; a second element (90, 90A) provided on the input shaft (21), having a center of mass (G2) spaced relative to the center line (CL) of the input shaft (21) and a second projection (92) that extends into a path of movement of the first projection (82, 82B, 82C), wherein the second element (90) is rotatable together with the first element (80, 80B, 80C) when the first projection (82, 82B, 82C) is in contact with the second projection (92); and a stop (61a) which is arranged in a position suitable for adjoining only one path of movement of the second element (90) when the second element (90) is rotated by the first element (80, 80B, 80C), and which is suitable for limiting a rotation of the steering wheel (11) by means of the input shaft (21) when the second projection (92) is in contact with it, wherein the second projection (92) comprises a radial projection (92a) extending in the radial direction from the second base (91) and an axial projection (92b) extending in the direction along the axial line (CL) from the radial projection (92a), and wherein the axial projection (92b) is able to rest against the first projection (82, 82B, 82C) and against the stop (61a).

A pipeline includes a pipeline body, a sealing member, and a sleeve. The pipeline body includes a connection end; the connection end includes a first section and a second section adjacent to the first section; and the first section includes an end face perpendicular to the axis of the pipeline body. The sealing member includes a first annular part and a second annular part; the first annular part and the second annular part are disposed coaxially; the second annular part includes a first surface oriented toward the first annular part; an axial projection of the first annular part falls within the first surface; the first surface includes a first region and a second region; the first region is enclosed by the axial projection of the first annular part, and the second region surrounds the axial projection of the first annular part.

The present invention relates to the field of cooling channels for metal cutting internally cooled tools, and more particularly to a composite spiral variable-diameter cooling channel structure and a metal cutting internally cooled tool. The composite spiral variable-diameter cooling channel structure is composed of a variable-diameter acceleration section channel, a composite spiral section channel, a transition section channel, and a trumpet outlet section channel, in sequence from the cooling channel inlet to the cooling channel outlet. Coolant flows from the cooling channel inlet into the variable-diameter acceleration section channel, and L>3D is satisfied; wherein L is the total axial projection length of the cooling channel from the cooling channel inlet to the cooling channel outlet, and D is the cutting diameter of the tool, with a value range of D from 3 mm to 40 mm. The composite spiral variable-diameter cooling channel provided by the present invention achieves a 25% to 35% increase in fluid flow rate while fully retaining the fluid kinetic energy of the coolant through its uniquely structured segmented channels, thereby improving the cooling effect by approximately 30%.

The utility model discloses a kind of aromatherapy, including the container cavity for placing aromatherapy substance, the opening of container cavity is equipped with cover, the cover includes the upper cover and lower cover that can relatively rotate, the upper cover is equipped with the through-hole for the first sealing member passing, the lower cover is equipped with the key type hole for the first sealing member passing, the first sealing member includes the key type portion, connecting portion and sealing portion sequentially arranged along axial direction, the key type portion penetrates the key type hole, the axial projection of the sealing portion covers the through-hole, the upper cover is equipped with the support for being abutted with the connecting portion, when the upper cover rotates, the support is changed with the abutted position of connecting portion along with rotation and make the sealing portion control the through-hole opening and closing.The utility model has the advantages that the relative positions of first sealing member, second sealing member and third sealing member can be kept, and they are opened synchronously at different speeds.

The application discloses a range hood, comprising a fan assembly and a fan frame, the fan assembly comprising an impeller body, a motor and a volute, the volute being provided with an opening for the impeller body to enter and exit, the axial projection of the impeller body along the axial projection of the fan frame having an overlap, the side plate of the fan frame close to the opening being provided with a recess, the recess extending upward from the bottom of the fan frame; along the direction of the opening inside the volute, the motor comprising a first shaft section and a second shaft section, the diameter of the first shaft section being greater than that of the second shaft section, the length of the first shaft section being A, the length of the second shaft section being B, the distance between the side of the volute provided with the opening and the side of the fan frame provided with the recess being E, wherein A < E < A + B. When the impeller body needs to be removed, the impeller body is first moved horizontally outward to the second shaft section, then moved downward by a distance, and the impeller body is turned in the direction of the recess, so that the impeller body can be removed.

The invention relates to the field of jigs, in particular to a silicon component jig which comprises a plurality of single plates, and the single plates are sequentially and detachably connected in the circumferential direction to form a jig body of an annular plate-shaped structure. The enclosure part is in a circular ring shape, protrudes out of the surface of one side of the jig main body and surrounds the jig main body in the circumferential direction of the jig main body so as to form an enclosure on the circumferential side of the jig main body; in the using state, on the projection in the axial direction, the projection of the telecentric end of the through groove to be machined of the silicon component is located in the projection range of the inner ring of the end, away from the jig body, of the enclosure part. According to the jig provided by the invention, the impact of water jet on the bottom wall of the exhaust fan main body during processing can be reduced, and the damage to the inner side wall of the side wall part of the exhaust fan main body caused by backwash generated when the jig body is impacted by the water jet can be reduced.

A hub assembly includes a hub shaft, a hub housing, a sprocket support, a first ratchet member, a second ratchet member, and a spacer. The spacer includes at least one base member and at least one axial projection. At least one axial projection extends in an axial direction from the at least one base member. The at least one axial projection is at least partially disposed between the at least one first tooth and the at least one second tooth in the circumferential direction. The first axial tooth end is closer to the axial center plane of the hub assembly than the second axial tooth end. At least one base member of the spacer is disposed closer to the first axial tooth end than the second axial tooth end.

An electromagnetic valve with an improved flow limiting assembly comprises a valve body, a coil assembly, an opening and closing assembly and the flow limiting assembly, the flow limiting assembly comprises a flow limiting valve seat and an elastic piece with a mounting through hole, the flow limiting valve seat comprises a base part, a surrounding edge part and a limiting column, and the limiting column is hollow to form a through hole penetrating through the base part; the limiting column is sleeved with the elastic piece through the mounting through hole, a water passing hole is formed in the area, located on the outer side of the limiting column, of the base part, a plurality of flow limiting columns are arranged on the side, axially facing the elastic piece, of the base part in a protruding mode in the circumferential direction, and a plurality of bosses are arranged on the other side, axially deviating from the elastic piece, of the base part in a protruding mode in the circumferential direction. The flow limiting column is located on the radial outer side of the profile of the projection of the water passing hole, and the boss is located on the radial inner side of the profile of the projection of the water passing hole. By means of the improved electromagnetic valve, bubbles of liquid penetrating through the base part can be punctured, the situation that the bubbles intersect at the downstream of the base part and collide is reduced, and the good noise reduction effect is achieved.

The present invention relates to a pressing tool for forming a green cutting blade blank (8) by compacting powder. The pressing tool includes a stamping device (3) comprising: an axially extending front section having a front end in a cavity, the front section being operable to present an initial orientation and a target orientation; and an axially extending rear section connected to the front section and located axially rear of the front section. The pressing tool further includes: a movably arranged spacer element (10) operable to translate from a starting position to a target position; and an arm member (17) extending axially along the rear section (14) at a distance from the rear section (14). A connector unit (18) connects the arm member (17) and the rear section such that the distance from the rear section (14) to the arm member (17) is adjustable at a position axially forward of the connector unit (18). The spacer element (10) is arranged and configured to engage the arm member (17) via the arm contact point (19) and the rear section via the rear contact point (20). When the spacer element (10) is in the initial position, the distance from the arm contact point (19) to the rear contact point (20) in the axial projection on the axial plane is the rear starting distance, thereby the joint unit (18) is in the initial state and the front section (11) is in the initial orientation. When the spacer element (10) is in the target position, the distance from the arm contact point (19) to the rear contact point (20) in the axial projection on the axial plane is the rear target distance (24), thereby the joint unit (18) is in the target state biased toward the initial state and the front section (11) is in the target orientation.

According to an aspect of the present invention, a vehicle tire having a tread is provided. The tread comprises a set of continuous blocks arranged along the outer circumference of the tire; a plurality of first grooves arranged across the outer circumference of the tire, each of which is positioned between two blocks of the set of continuous blocks; and a plurality of sipes, each defining an edge component El corresponding to the ratio of the sum of the axial projection lengths SAP of the plurality of sipes to the outer circumference C of the tread. El is at least 2 and at most 20. The tread is made from a rubber composition having an E' of at least 20 MPa and at most 80 MPa at -20°C when measured according to ISO 4664.

An impeller rotor assembly (100), comprising a rotor core (10) and a permanent magnet (20), the permanent magnet (20) penetrating into a permanent magnet (101) of the rotor core (10). The impeller rotor assembly (100) further comprises a rotor insulator (30), the rotor insulator (30) being an injection molded body. The rotor insulator (30) comprises an impeller part (301) and a rotor part (302) which are arranged in the axial direction and are connected to one another. The rotor part (302) is connected to the rotor core (10) and the permanent magnet (20) by means of injection molding. The rotor part (302) comprises a first part (3021). The first part (3021) partially covers the end surfaces of the rotor core (10) and the permanent magnet (20) facing away from the impeller part (301), and defines a first positioning hole (32) and a second positioning hole (33). An axial projection of the first positioning hole (32) partially coincides with an end surface of one end of the rotor core (10) in the axial direction such that the end surface of the one end of the rotor core (10) in the axial direction is partially exposed, and an axial projection of the second positioning hole (33) partially coincides with an end surface of one end of the permanent magnet (20) in the axial direction such that the end surface of the one end of the rotor core (10) in the axial direction is partially exposed. According to the described impeller rotor assembly, structural strength and stability are improved, and machining costs and difficulty are reduced.

Tool holder (10) for rotating cutting tools with an axis of rotation (R), a body (12) with a receptacle (14) for the rotating cutting tool, wherein the receptacle (14) extends coaxially to the axis of rotation (R), and at least one coolant channel (26) which opens into an opening (28) and is designed to supply coolant to the rotating cutting tool via the opening (28), characterized in that the coolant channel (26) extends through an axial projection (20) and the tool holder (10) has an adjustment mechanism (34) which can be adjusted between a first position in which the opening (28) is spaced at a first radial distance (r1) from the axis of rotation (R), and a second position in which the opening (28) is spaced at a second, different radial distance (r2) from the axis of rotation (R).wherein the axial projection (20) is elastically deflected in the second position relative to the first position by the adjustment mechanism (34).

The invention relates to a powder inhaler comprising a body (10) accommodating a strip (20) of at least two individual reservoirs (20a, 20b, 20c, 20d), each individual reservoir having a cavity (21) containing a dose of powder and a closure layer (22) for sealing the cavity (21), the body (10) comprising a head portion (11) and a support portion (12), the head portion (11) and the support portion (12) being connected by at least one articulation (13) such that the body (10) is deformable and / or movable between an open position and a closed position, wherein the head portion (11) comprises a dispensing port (110) and a perforating element (112) connected to the dispensing port (110) and capable, during actuation, of piercing the closure layer (22) in order to open an individual reservoir (20a, 20b, 20c, 20d), and wherein the head portion (11) comprises at least one axial projection (115) associated with the perforating element (112), and wherein the strip (20) of reservoirs comprises at least one lateral edge provided with cut-outs (24a, 24b, 24c) arranged between the individual reservoirs (20a, 20b, 20c, 20d), which define flaps (25a, 25b, 25c, 25d) for each individual reservoir (20a, 20b, 20c, 20d), and wherein each axial projection (115) folds a respective flap (25a, 25b, 25c, 25d) during actuation.

The invention belongs to the technical field of coating equipment, and particularly relates to a silicon carbide furnace tube preparation method and a furnace tube mounting structure. The furnace tube mounting structure comprises a furnace body, a furnace tube and a flange assembly. A furnace body cavity penetrating in the axial direction of the furnace body is formed in the furnace body, and a furnace body opening is formed in one axial end of the furnace body; the furnace tube penetrates into the furnace body cavity along the axial direction, and a furnace tube cavity is formed in the furnace tube; the flange assembly is connected to the furnace body opening and internally provided with a passageway communicating with the furnace tube cavity, and a limiting structure is arranged in the passageway. Wherein the furnace tube is a silicon carbide furnace tube, the furnace tube opening is located in the passage, the axial projection of the limiting structure at the furnace tube opening is at least partially overlapped with the tube wall of the furnace tube opening, the limiting structure is located on the axial outer side of the furnace tube opening, and an axial gap is formed between the limiting structure and the furnace tube opening. In the invention, the axial gap is the axial thermal expansion allowance reserved for the furnace tube, so that the furnace tube is prevented from forming relatively large thrust at the flange assembly after being heated and expanded, and the risk of sealing failure is reduced.

The invention relates to a suspension bump stop for a motor vehicle, comprising an upper cup (2) and a lower cup (3) forming a relative rotation interface between them, said lower cup having a lower bearing wall (4) against which a suspension spring (1) is intended to bear, said bearing wall having an annular bearing surface (4a) extending along a radial dimension, the bearing wall (4) having a wall (6) which extends axially in projection from the radial bearing surface (4a) over a height H, said radial bearing surface having at least one set of three bosses (7a) distributed angularly and which extend in axial projection over a height h which is less than the height H. Figure 1

The invention discloses an assembling and clamping integrated mechanical gripper, and relates to the technical field of mechanical arms. The mechanical gripper comprises a base, a basic shaft and a clamping mechanism; one end of the basic shaft is fixedly connected to the base; the clamping mechanism comprises at least two sets of clamping assemblies, each set of clamping assembly comprises grippers and a clamping driving assembly used for driving the grippers to swing, the number of the grippers of each set of clamping assembly is at least two, and the grippers are circumferentially distributed around the basic shaft; the lengths of the grippers in different groups are different, one ends of the grippers in partial groups are directly or indirectly hinged to the base, and one ends of the grippers in partial groups are directly or indirectly hinged to the basic shaft; in the axial projection of the basic shaft, the grippers in different groups are not overlapped. A plurality of sets of grippers are integrated on the mechanical gripper, synchronous grabbing and assembling of multiple workpieces can be achieved, and the mechanical gripper has the advantages of being low in cost, small in occupied space, high in working efficiency and the like.

The application provides a switching valve for waterway control of an electric toilet bowl, comprising a valve body, a valve cover, a valve core, a sealing element and a valve rod. In the axial projection view of the valve body, the second water outlet and the third water outlet are located on the same side of the center line X, and the intersection angle between the second water outlet axis and the third water outlet axis is an acute angle Q1, and the first water outlet is located on the other side of the center line X. In the axial projection view of the valve core, the first through hole, the second through hole axis and the third through hole are located on the same side of the center line X, and the intersection angle between the second through hole axis and the third through hole axis is also an acute angle Q1. Through the arrangement of the valve body water outlet and the through hole of the valve core, the switching valve only needs one power source to realize the functions of the first, second and third waterways being separately connected and the functions of the second and third waterways being simultaneously connected. The application also provides an electric toilet bowl applying the switching valve.

This disclosure provides a clamping pliers, including a jaw assembly, a lever assembly, a housing, a clamping drive mechanism, and a reset mechanism. The lever assembly is connected to the housing, the jaw assembly is connected to the distal end of the lever assembly, the clamping drive mechanism is configured to drive the clamp into the jaw assembly, and the reset mechanism includes an operating member and a clamping reset drive member. In response to the operating member driving the clamping reset drive member to move along a first direction, the clamping pliers switch from a first state to a second state, such that the axial projections of the second drive portion of the clamping reset drive member and the first drive portion of the clamping drive mechanism at least partially overlap, driving the clamping drive mechanism to move axially towards the proximal side to achieve the reset of the clamping drive mechanism. This disclosure allows for manual reset of the clamping drive mechanism with a single operation of the operating member, resulting in a simple structure and convenient use.

The utility model discloses a valve body main hole structure of an anti-jumping ring and an electromagnetic valve, and belongs to the technical field of electromagnetic valves. The inner wall of the valve body main hole is provided with an air hole surface and a sealing surface which are arranged at an interval, and the air hole surface is in transition connection with the sealing surface through an inclined surface; the slopes located on the two sides of the air hole face comprise the dangerous slope and the safe slope, the height of the sealing face connected with the dangerous slope is the same as the height of the sealing face connected with the safe slope, the safe slope is configured to be matched with the forward movement path of the valve rod, and the movement is driven by air pressure. The dangerous slope is configured to be matched with the reverse moving path of the valve rod, and the moving path is driven by elastic force; and the axial projection length of the dangerous inclined plane is greater than that of the safe inclined plane. A high-risk dangerous inclined plane is lengthened, a gentle slope is optimized, the back pressure side negative pressure effect and the axial pull-out force are reduced, meanwhile, the radial pressing effect is enhanced, and the phenomenon that the sealing ring jumps due to the high pressure difference is fundamentally restrained.

The invention relates to an adjusting arrangement (1) for adjusting an adjusting element (4) of a motor vehicle (5), which comprises a drive unit (8) having a drive train with several interconnected train components (7, 10, 11, 19, 20, 22), wherein the drive unit (8) comprises as train components (7, 10, 11, 19, 20, 22) a hollow cylinder (10) and a rod (11) axially guided therein, wherein the adjusting arrangement (1) comprises a drive spring arrangement (16) with at least one drive spring (17) and a spring retaining element (18), wherein there is an axially fixed connection between the spring retaining element (18) and one of the train components (10, 11) associated with the spring retaining element (18), wherein the spring retaining element (18) projects radially into an axial projection (P) of the material of the drive spring arrangement (16) and is configured to exert an axial force to accommodate the drive spring assembly (16).It is proposed that the spring locking element (18) is formed by a pin element (24) extending along a geometric pin element axis (23), which is arranged to absorb the axial force of the drive spring assembly (16) at least in the case of firing when assembled, and to axially secure at least one further of the string components (7, 19, 20, 22) at least in the direction of action of the spring force to the string component (10, 11) associated with the spring locking element (18).

This utility model discloses an inverted drainage pump with improved self-priming performance, comprising a pump cover component, a pump casing component, and a rotor-impeller assembly. The impeller cover of the impeller body component has an impeller suction port at its center, with blades extending into the axial projection position of the impeller suction port, and the blades forming an inclined portion at the axial projection position of the impeller suction port. The rotor chamber of the pump casing component is equipped with an exhaust channel connecting to the outside. When water enters through the inlet of the pump cover component, the air in the rotor chamber of the pump casing component is driven by pressure and discharged to the outside along the exhaust channel. This utility model mainly solves the problem of how to improve the self-priming performance of an inverted drainage pump. When the liquid medium is sucked into the impeller chamber, the air retained in the rotor chamber is driven by pressure and discharged to the outside along the exhaust channel, resulting in a higher negative pressure in the impeller chamber and rotor chamber, thereby improving the self-priming performance of the inverted drainage pump.