CN216407811U - Valve core - Google Patents

Abstract

The utility model provides a valve core, which comprises a valve shell; the valve rod, the movable ceramic plate, the static ceramic plate and the sealing washer are sequentially arranged on the valve shell from bottom to top; wherein, the predetermined part of the valve shell is provided with two opposite arc-shaped limiting grooves; the limiting part is provided with a sleeve hole and two opposite limiting convex parts, the sleeve hole can be selectively sleeved and fixed on the rod part of the valve rod at a first angle position or a second angle position, the limiting convex parts can be accommodated and limited in the corresponding arc limiting grooves of the valve shell when the first angle position is carried out, the valve rod is allowed to rotate to the maximum opening position from the closing position along the clockwise direction, and the valve rod is allowed to rotate to the maximum opening position from the closing position along the anticlockwise direction when the second angle position is carried out. Therefore, under the condition of sharing the valve shell, the limiting piece is arranged on the valve rod at different angle positions, so that the valve core can be arranged and suitable for a cold water side or a hot water side, the production and manufacturing cost of the valve shell is favorably reduced, and the valve shell is easy and quick to assemble.

Description

Valve core

Technical Field

The utility model relates to a component for a faucet, in particular to a valve core which can be installed and suitable for a cold water side or a hot water side and is provided with a single inlet and a single outlet.

Background

The valve core is widely applied to kitchen or bathroom faucets, and a common double-handle faucet is generally internally provided with an H-shaped water through piece, the left side and the right side of the water through piece are respectively provided with a valve seat, the valve core can be respectively installed, the bottom ends of the left side and the right side of the water through piece are respectively provided with a cold water inlet and a hot water inlet, cold water and hot water can respectively enter the corresponding valve cores and then flow to the corresponding valve cores, a user can respectively control the corresponding valve cores by turning the left side handle and the right side handle to switch and control the water flow, so that the cold water and the hot water are mixed with each other at the middle section of the water through piece in proper proportion and then flow out from the central water outlet of the water through piece.

It can be easily understood that the angles of the left and right handles from the closed position to the open position are generally the same, but the rotation directions of the handles are opposite, for example, the handles of the conventional pull-type left and right handles are generally in a straight line in the closed position, when a user wants to open the two handles simultaneously, the left handle must be pulled 90 degrees counterclockwise to make the handle face the front of the user, and the right handle must be pulled 90 degrees clockwise to make the handle face the front of the user. Of course, the handle may be designed to have other angles from the closed position to the open position, not limited to the 90 degrees, and the limitation of the rotation angle may be achieved by a limiting structure of the valve element itself, or by a limiting structure between the valve element and other external faucet components, wherein the limiting structure of the valve element itself is common.

The valve core is generally provided with a valve casing, and a valve rod, a movable ceramic piece, a static ceramic piece and a sealing washer are sequentially installed from bottom to top, wherein two opposite arc-shaped grooves are formed inside the valve casing, two protruding columns are formed on the outer peripheral wall of the valve rod and can be respectively contained and limited in the arc-shaped grooves, so that the valve rod is limited to rotate within a certain angle range, for example, the valve rod rotates within a range of 90 degrees, namely, the valve rod is limited to rotate between a closed position and a maximum open position, and the Chinese patent of the utility model with the publication number of CN 209309353U, CN 212480189U clearly discloses a limiting structure. As is known, in the closed position, the water flow holes of the static ceramic plate are blocked and closed by the static ceramic plate, so that cold water or hot water entering from the sealing washer can only reach the static ceramic plate, and when a user drives the valve rod of the valve core to drive the ceramic plate to rotate to the maximum opening position through the handle, the water flow holes of the static ceramic plate can be opened, so that the cold water or hot water passing through the sealing washer can pass through the water flow holes and then flow out from a water through port formed on the wall around the valve shell, and then flow to the central water outlet of the water passing part.

As described above, since the rotation directions of the left handle and the right handle from the closed position to the open position are opposite, the rotation directions of the left handle and the right handle are opposite, so that the positions of the arc-shaped grooves for limiting the positions inside the valve housings of the left valve core and the right valve core are required to be designed individually and cannot be shared with each other.

SUMMERY OF THE UTILITY MODEL

The main objective of the present invention is to provide a valve core, which is suitable for being installed on a cold water side or a hot water side, and can share a valve housing, thereby reducing the manufacturing and material preparation costs of the valve housing, ensuring the smoothness and the firmness of the rotation limit of the valve core, and simultaneously providing a simple, rapid and correct assembly operation.

In order to achieve the above object, the present invention provides a valve core, comprising a valve housing having an inner chamber and a through hole communicating with the inner chamber, and a wall around the inner chamber is provided with at least one water passage port; a valve stem rotatably mounted to the valve housing and having a stem portion and a valve portion connected, the stem portion passing through the bore of the valve housing from bottom to top, the valve portion being sealed to an inner peripheral wall of the internal chamber; the movable ceramic plate can be driven by the bottom of the valve rod to rotate; the static ceramic plate is fixed on the peripheral wall of the inner cavity below the movable ceramic plate, is provided with at least one water flow channel and can be closed and blocked or opened by the movable ceramic plate; the sealing washer is arranged in the valve shell below the static ceramic plate;

the valve shell is provided with two opposite arc-shaped limiting grooves; the valve cartridge further includes:

the limiting piece is provided with a sleeving hole and two opposite limiting convex parts; the limiting member may be selectively sleeved and fixed to the rod portion of the valve rod at a first angular position or a second angular position through the sleeving hole, and at the first angular position, the limiting protrusion may be received and limited in the arc-shaped limiting groove corresponding to each of the valve housing, so as to allow the valve rod to rotate from the closed position to the maximum opening position along the clockwise direction, and at the second angular position, the limiting protrusion may be received and limited in the arc-shaped limiting groove corresponding to each of the valve housing, so as to allow the valve rod to rotate from the closed position to the maximum opening position along the counterclockwise direction.

In one embodiment, the valve housing is internally provided with an installation groove above the through hole, the installation groove is defined with an inlet, the inner circumferential wall of the installation groove is radially provided with two opposite convex ribs in a protruding manner, and the convex ribs can define the arc-shaped limiting groove; the limiting part is in a sleeve shape, the sleeve hole can be formed in the center, two opposite convex blocks are arranged on the outer circumferential wall in a radial protruding mode and used for forming the limiting convex part, the sleeve hole of the limiting part can be nested in the rod part of the valve rod from top to bottom, and the limiting convex part can be accommodated into the arc limiting grooves from top to bottom, wherein the arc limiting grooves are opposite to each other.

In one embodiment, the top edge of the convex rib of the mounting groove is spaced from the placing port by a distance to form a space; the top end of the peripheral wall of the limiting piece is provided with a lip edge which can be nested and positioned in the interval so as to be mutually abutted and sealed with the inner peripheral wall of the mounting groove.

In one embodiment, the stem portion peripheral wall of the valve stem is non-circular; the sleeve hole of the limiting part can be embedded and fixed on the peripheral wall of the rod part in a matched manner, so that the limiting part can rotate along with the valve rod.

In one embodiment, the peripheral wall of the stem portion of the valve stem and the socket hole of the limiting member are designed to be square, and the first angular position and the second angular position are different by 90 degrees.

In one embodiment, each outer wall surface of the rod part of the valve rod is provided with a longitudinal rib part in a protruding mode at a position close to the lower portion; each inner wall surface of the sleeve hole of the limiting part is also respectively concavely provided with a longitudinal clamping groove which extends upwards from the bottom edge for a certain distance and is in a closed groove shape, and the longitudinal rib part can be allowed to be embedded and plugged into each longitudinal clamping groove from bottom to top.

In one embodiment, the valve housing is further provided with an identification mark on the periphery of the insertion opening thereof as a reference point for the position-limiting element when determining the assembly position.

In one embodiment, a fastening structure capable of being fastened and positioned with each other is disposed between the outer wall surface of the rod portion of the valve rod and the inner wall surface of the sleeve hole of the limiting member.

In one embodiment, the valve rod may have inverted hook-shaped fixture blocks respectively protruding from two opposite wall surfaces of the rod portion having a substantially square cross section, and an annular groove is concavely formed in an inner peripheral wall of the sleeve hole of the limiting member for hooking and positioning the fixture blocks therein, thereby forming the snap structure together.

In one embodiment, the limiting member mounted at the first angular position and the limiting member mounted at the second angular position are designed to have different colors respectively.

In one embodiment, said valve housing peripheral wall is formed with two opposing openings above said through hole thereof for forming said arcuate retention groove; the limiting part is in a ring sheet shape, the sleeving hole can be formed in the center, two opposite lugs are arranged on the outer circumferential wall in a protruding mode in the radial direction and used for forming the limiting convex part, the limiting part can be placed into the valve shell from one of the arc-shaped limiting grooves in advance, the rod part of the valve rod can penetrate through the sleeving hole from bottom to top and can be fixed in the sleeving hole in an embedded mode, and the limiting convex part is contained and limited in the arc-shaped limiting groove.

In one embodiment, the stem portion peripheral wall of the valve stem is non-circular; the sleeve hole of the limiting part can be embedded and fixed on the peripheral wall of the rod part in a matched manner, so that the limiting part can rotate along with the valve rod.

In one embodiment, the peripheral wall of the stem portion of the valve stem and the socket hole of the limiting member are designed to be square, and the first angular position and the second angular position are different by 90 degrees.

In one embodiment, the retaining member is a metal stamping and four reinforcing lips are axially stamped at the socket.

In one embodiment, the stem peripheral wall of the valve stem has a plurality of first teeth arranged and distributed in a circumferential direction; the inner peripheral wall of the sleeve hole of the limiting part is distributed with a plurality of second engaging teeth along the circumferential direction, and the second engaging teeth can be mutually meshed with the first engaging teeth in a sleeve mode.

In one embodiment, the stem peripheral wall of the valve stem is formed with two first tangential planes; the inner peripheral wall of the sleeving hole of the limiting part is provided with a second tangent plane, and the first tangent plane can be selectively sleeved and jointed with one of the first tangent planes at the first angle position or sleeved and jointed with the other first tangent plane at the second angle position.

In one embodiment, the first tangential planes are separated by an angle of 90 degrees.

In one embodiment, the valve housing peripheral wall is further provided with an identification mark in the vicinity of one of the arc-shaped retainer grooves as a reference point of the retainer when determining the assembling position.

The valve core of the utility model can be arranged on the valve rod by utilizing the limiting piece at different angle positions under the condition of sharing the valve shell, so that the valve core can be arranged and suitable for the cold water side or the hot water side, and the sharing effect can be achieved by only increasing small structural members, namely the limiting piece without respectively developing different valve shells aiming at the cold water side and the hot water side, thereby reducing the development cost of a pair of valve shell molds, reducing the material preparation quantity of the valve shells and effectively reducing the production and manufacturing and material preparation cost of the valve shells on the whole.

The valve core of the utility model can effectively hide and seal the limiting structure formed by the arc-shaped limiting groove and the limiting convex part in the internal structure formed by the valve shell and the limiting part, thereby not only obtaining better appearance aesthetic feeling, but also effectively preventing external impurities, foreign matters or moisture from entering the limiting structure to influence the smoothness of the rotation of the valve rod, and ensuring the smoothness and the reliability of the rotation limiting of the valve core between the closing position and the opening position.

The valve core of the utility model can make users or assembly personnel visually know that the installation is suitable for the cold water side or the hot water side through the identification of the color by the design of the limiting pieces with different colors, thereby having the simple, quick and correct identification function and achieving the anti-cheating effect of preventing the installation error.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is an external combination view of a valve cartridge according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of the present invention taken along section line 1-1 of FIG. 1 and showing the valve cartridge in a closed position;

FIG. 3 is a cross-sectional view of the present invention taken along section line 2-2 of FIG. 1;

FIG. 4 is an exploded perspective view of a valve cartridge provided in accordance with a first embodiment of the present invention;

FIG. 5 is a side plan view of the valve cartridge provided in accordance with the first embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along section line 3-3 of FIG. 5 and showing the stop member assembled at a first angular position in accordance with the present invention;

FIG. 7 is a schematic view of the limiting member shown in FIG. 6 assembled at a second angular position according to the present invention;

FIG. 8 is a side sectional view of a valve housing provided by the present invention;

FIG. 9 is the valve cartridge of FIG. 2 of the present invention rotated to a maximum open water outlet position and illustrating the flow path of the water flow;

FIG. 10 is a cross-sectional view of a rod portion and a stop of the alternative embodiment of the present invention shown in FIG. 6;

FIG. 11 is an exploded perspective view of the valve stem and stop of FIG. 10 in accordance with the present invention;

fig. 12 is an external combination view of a valve cartridge according to a second embodiment of the present invention;

FIG. 13 is a cross-sectional view of the present invention taken along section line 4-4 of FIG. 12;

FIG. 14 is a cross-sectional view of the present invention taken along section line 5-5 of FIG. 12;

FIG. 15 is an exploded isometric view of a valve cartridge provided in accordance with a second embodiment of the present invention;

FIG. 16 is a side plan view of a valve cartridge provided in accordance with a second embodiment of the present invention;

FIG. 17 is a cross-sectional view of the present invention taken along section line 6-6 of FIG. 16;

FIG. 18 is an exploded perspective view of a stop and a portion of a valve stem according to another exemplary embodiment of the present invention;

FIG. 19 is a bottom perspective view of the limiter of FIG. 18 according to the present invention;

FIG. 20 is an exploded perspective view of a stop and stem in accordance with yet another exemplary embodiment of the second embodiment of the present invention;

FIG. 21 is a transverse cross-sectional view of the stop and valve stem of FIG. 20, taken along the stop, in an assembled state;

fig. 22 is a transverse sectional view of a limiting member and a valve stem of a further embodiment of the present invention, taken along the limiting member in an assembled state.

Detailed Description

The utility model is further illustrated with reference to the following figures and examples.

As shown in fig. 1 to 7, the present invention provides a first embodiment of a valve core, the valve core 1 of this embodiment mainly includes a valve housing 10 having an internal chamber 11 and a through hole 12 communicating with the internal chamber 11, and a wall 13 surrounding the internal chamber 11 is provided with at least one water passage port 131; a valve rod 20 rotatably mounted to the valve housing 10 and having a rod portion 21 and a valve portion 22 connected to each other, the rod portion 21 passing through the through hole 12 of the valve housing 10 from bottom to top, the valve portion 22 being sealed in contact with the inner peripheral wall of the internal chamber 11; the movable ceramic piece 30 can be driven by the bottom of the valve rod 20 to rotate, in the embodiment, two caulking grooves 31 are arranged on the movable ceramic piece 30, two caulking blocks 221 are arranged at the bottom end of the valve part 22 of the valve rod 20 and are embedded and positioned in the caulking grooves 31 so as to drive the movable ceramic piece 30, and two opposite water passing concave parts 32 are concavely arranged on the outer peripheral wall of the movable ceramic piece 30; the static ceramic plate 40 is fixed on the peripheral wall 13 of the inner cavity 11 below the movable ceramic plate 30, and has at least one water flow channel 41 which can be closed and blocked or opened by the movable ceramic plate 30, the static ceramic plate 40 of the embodiment is provided with two opposite positioning bumps 42 by virtue of the outer peripheral wall in a protruding manner, and the two opposite positioning bumps are used for being axially embedded and clamped into two opposite positioning clamping grooves 132 which are oppositely arranged on the inner peripheral wall of the valve shell 10, so as to limit the rotation of the static ceramic plate 40; a sealing washer 50 for caulking the inside of the valve housing 10 installed below the static ceramic plate 40; the main improvement lies in that:

the valve housing 10, as shown in fig. 8, has two opposing arcuate limiting grooves 14. The valve cartridge 1 further includes:

a limiting member 60 having a socket hole 61 and two opposite limiting protrusions 62; the position-limiting member 60 can be selectively sleeved and fixed to the stem 21 of the valve rod 20 at a first angular position P1 or a second angular position P2 through the sleeving hole 61, and at the first angular position P1, as shown in fig. 5 and 6, the position-limiting protrusion 62 can be received and limited in each of the opposite arc-shaped limiting grooves 14 of the valve housing 10, and allow the valve rod 20 to rotate from the closed position to the maximum opening position by a predetermined angle θ 1 in the clockwise direction, and at the second angular position P2, as shown in fig. 7, the position-limiting protrusion 62 can be received and limited in each of the opposite arc-shaped limiting grooves 14 of the valve housing 10, and allow the valve rod 20 to rotate from the closed position to the maximum opening position by a predetermined angle θ 2 in the counterclockwise direction.

It should be noted that, when the valve rod 20 is at the closed position, the water passage 41 of the static ceramic plate 40 closes and blocks the passive ceramic plate 30, so that the valve core 1 is at the closed water outlet state, and when the valve rod 20 is rotated to the maximum opening position, the cold water or the hot water allowed to pass through the water passage 41 of the static ceramic plate 40 sequentially flows out through the water passage concave portion 32 of the movable ceramic valve 30 and the water passage opening 131 of the valve housing 10, as shown in fig. 9, so that the valve core 1 is at the maximum opening water outlet state.

In this embodiment, as shown in fig. 4 and 8, an installation slot 15 is formed in the valve housing 10 above the through hole 12, an inlet 151 is defined above the installation slot 15, two opposite protruding ribs 152 are radially protruded on the inner peripheral wall thereof, and an arc-shaped limiting slot 14 is defined between the protruding ribs 152; the position-limiting member 60 is in a sleeve shape, and a sleeve hole 61 can be formed in the center of the position-limiting member, and two opposite protrusions are protruded radially on the outer peripheral wall of the position-limiting member to form a position-limiting protrusion 62, the sleeve hole 61 of the position-limiting member 60 can be nested in the rod portion 21 of the valve rod 20 from top to bottom, and meanwhile, the position-limiting protrusion 62 can be received in each of the opposite arc-shaped position-limiting grooves 14 from top to bottom.

In this embodiment, the top edge of the protruding rib 152 of the mounting groove 15 is spaced from the inlet 151 by a distance to form a gap 153; the top end of the outer peripheral wall of the retainer 60 forms a lip 63 for nesting and positioning in the space 153, thereby abutting and sealing against the inner peripheral wall of the mounting groove 15. Accordingly, the limiting structure formed by the arc-shaped limiting groove 14 and the limiting convex portion 62 can be effectively hidden and sealed, so that not only can a better aesthetic appearance be obtained, but also more importantly, the smoothness of the rotation of the valve rod 20 can be prevented from being affected by the external impurities, foreign matters or moisture entering the limiting structure, that is, the smoothness and reliability of the rotation limitation can be effectively ensured.

In the present embodiment, the stem portion 21 of the valve stem 20 has a non-circular outer peripheral wall; the engaging hole 61 of the retainer 60 is fittingly engaged with and fixed to the outer peripheral wall of the stem 21, so that the retainer 60 can rotate with the valve stem 20. Further, the outer peripheral wall of the stem 21 of the valve stem 20 and the receiving hole 61 of the retainer 60 are designed to be fittingly received in each other and each corner can have a square shape with a lead angle, and it can be easily understood that, according to the design, the first angular position P1 and the second angular position P2 are different by 90 degrees, as can be clearly seen from comparing fig. 6 and 7. It should be noted that before assembling the limiting member 60, it may be determined whether the valve rod 20 is located at a specific position, for example, the valve rod 20 may be rotated and located at the closed position, that is, the assembly operation of the limiting member 60 is performed after the valve rod 20 is located at the closed position as a reference point for the assembly.

In the present embodiment, the valve housing 10 is further provided with an identification mark 16, such as a raised point, at a specific position on the periphery of the insertion opening 151, as shown in fig. 1 and 4, as a reference point for the position-limiting member 60 when determining the assembling position. For example, when the limiting member 60 is assembled and sleeved on the rod 21 with one of the limiting protrusions 62 aligned with the identification mark 16, the assembled position is the first angular position P1, as shown in fig. 6, conversely, when the limiting member 60 is assembled and sleeved on the rod 21 with one of the limiting protrusions 62 and the identification mark 16 staggered 90 degrees, the assembled position is the second angular position P2. As can be seen from the above, the predetermined angles θ 1 and θ 2 are both 90 degrees, but are not limited to 90 degrees.

As described above, according to the design and assembly method of the present embodiment, when the position limiting element 60 is assembled to the stem 21 of the valve stem 20 at the first angular position P1, the valve stem 20 can be allowed to rotate clockwise from the closed position to the open position, and therefore, the handle can be installed on the right handle, especially the right handle, from the water-off position toward the right direction, after rotating 90 degrees clockwise, to the maximum water-out position facing the front of the user.

Similarly, when the position-limiting element 60 is assembled to the stem 21 of the valve stem 20 at the second angular position P2, the valve stem 20 can be allowed to rotate from the closed position to the open position in the counterclockwise direction, so that the handle can be installed on the left handle, especially the left handle, from the water-closing position toward the left direction, and after rotating 90 degrees in the counterclockwise direction, the handle reaches the maximum water-outlet opening position facing the front of the user.

Generally, the left handle is usually designed as the hot water side, and the right handle is designed as the cold water side, so that the stopper 60 is assembled at the first angular position P1, and the valve cartridge 1 adapted to the right handle is installed, mainly for on-off control and adjustment of the cold water flow. Conversely, the stop 60 is assembled in the second angular position P2, and the valve cartridge 1 mounted for the left handle is used for on-off control and regulation of the hot water flow.

In fact, the valve core 1 is usually pre-assembled when being sold as a product, and the product, the packaging box or the instruction book thereof will usually clearly indicate or explain the using method and specification, so that the user or the assembling personnel can directly install the assembled valve core 1 on the cold water side or the hot water side of the faucet.

For the convenience of further identification by the user or the assembler, the limiting member 60 installed at the first angular position P1 and the limiting member 60 installed at the second angular position P2 may be designed to have different colors. For example, according to the common recognition of the general public, the stopper 60 installed at the first angular position P1 may be designed to be blue so that the user or the assembler can visually recognize that it is used at the cold water side, and the stopper 60 installed at the second angular position P2 may be designed to be red so that it is recognized that it is used at the hot water side. Therefore, the recognition function can be provided more easily, quickly and accurately, thereby achieving the anti-cheating effect of preventing installation errors.

In the present embodiment, a fastening structure capable of fastening and positioning each other is disposed between an outer wall surface of the rod portion 21 of the valve rod 20 and an inner wall surface of the sleeve hole 61 of the stopper 60, so as to prevent the stopper 60 from moving away from the rod portion 21 in the axial direction after being assembled. Furthermore, in the valve stem 20, the two opposite wall surfaces of the stem portion 21 having a substantially square cross section are respectively provided with a protruding hook-shaped latch 211, as shown in fig. 2 to 4, and the inner peripheral wall of the engaging hole 61 of the limiting member 60 is provided with a recessed ring-shaped latch groove 611 for the latch 211 to be hooked and positioned therein, so as to form a latching structure. Accordingly, the reliability of the assembly structure of the valve body 1 can be ensured.

As shown in fig. 10 and 11, in the present embodiment, the outer peripheral wall of the rod portion 21 of the valve stem 20 and the engaging hole 61 of the limiting element 60 can be designed to be square, which can engage with each other and have an arc corner, and a longitudinal rib 211b can be respectively protruded from a position, close to the lower portion, of each outer wall 211a except the leading corner of the rod portion 21, and a longitudinal groove 611b extending upward from the bottom edge and forming a closed groove is respectively recessed from each inner wall 611a except the arc corner in the engaging hole 61 of the limiting element 60, so that when the limiting element 60 is assembled, each longitudinal rib 211b can be inserted into each longitudinal groove 611b from the bottom up, thereby increasing the strength and tightness of the mutual assembling and combining between the rod portion 21 and the limiting element 60, further improving the reliability and stability of the rotational limiting, and particularly preventing the limiting element 60 from loosening.

As shown in fig. 12 to 17, the present invention also provides a second embodiment of a valve core, and the main difference between the valve core 1 of the present embodiment and the valve core 1 of the first embodiment is that:

the limiting member 60 of the first embodiment is directly mounted on the rod portion 21 of the valve rod 20 from top to bottom after the valve rod 20 is assembled in the valve housing 10, but the limiting member 60a of the present embodiment is previously and transversely disposed inside the valve housing 10, so that the valve rod 20 and the limiting member 60a are synchronously fixed to each other in a penetrating manner during the assembling process of the valve rod 20 and the valve housing 10. Accordingly, the valve housing 10 must be provided with a structure for the limiting element 60a to be inserted laterally, and the limiting element 60a is also structurally different from the limiting element 60 of the first embodiment.

Furthermore, the wall 13 around the valve housing 10 is formed with two opposite openings above the through hole 12 to form an arc-shaped limiting groove 14; the position-limiting element 60a is in the shape of a ring-shaped piece, and a socket hole 61 is formed at the center, and two opposite protrusions are protruded radially on the outer peripheral wall to form a position-limiting protrusion 62. Therefore, when the limiting member 60a is assembled, one of the arc-shaped limiting grooves 14 can be placed into the valve housing 10 in advance, so that the rod portion 21 of the valve rod 20 can be synchronously inserted into the sleeving hole 61 from bottom to top and nested and fixed in the sleeving process during the assembly of the valve rod and the valve housing 10, and the limiting convex portion 62 can be ensured to be accommodated and limited in each corresponding arc-shaped limiting groove 14.

As shown in fig. 17, it can be clearly seen that after the assembly of the limiting element 60a of the present embodiment is completed, the limiting protrusions 62 can be respectively received and limited in the corresponding arc-shaped limiting grooves 14 of the valve housing 10, so as to allow the valve rod 20 to rotate from the closed position to the maximum opening position in the counterclockwise direction, and therefore, the limiting element 60a shown in the drawings is assembled at the second angular position P2.

Since the limiting member 60a of the present embodiment is in the shape of a sheet, a metal material with high rigidity can be selected, and in order to ensure that the limiting member 60a can stably maintain a desired rotation limiting function for a long time and effectively reduce the production cost, the limiting member 60a can be integrally formed by a metal stamping process, as shown in fig. 18 and 19, the limiting member 60a is formed by a metal stamping, which can effectively improve the production efficiency and reduce the production cost, and the four reinforcing lips 611 are integrally stamped at the sleeve hole 61 along the axial direction, so as to improve the structural strength, especially the torsion strength, of the sleeve hole 61, and thus the rotation limiting function can be stably maintained for a long time.

The outer wall surface of the stem portion 21 of the valve stem 20 in the above embodiments is designed to be substantially square, and the opposite engaging holes 61 of the position-limiting members 60, 60a may also be designed to be square holes that can be engaged with each other, but not limited thereto, and the outer peripheral wall of the stem portion 21 and the engaging holes 61 of the position-limiting members 60, 60a may also be designed to form a plurality of teeth-like structures that can be engaged with each other, as shown in fig. 20, 21, as can be clearly seen from the drawings, a plurality of first engaging teeth 212 are distributed on the outer peripheral wall of the stem portion 21 along the circumferential direction, and a plurality of second engaging teeth 613 are distributed on the inner peripheral wall of the engaging holes 61 of the position-limiting member 60a along the circumferential direction, and can be engaged with the first engaging teeth 212.

In addition, as shown in fig. 22, two first tangential planes 213 may be formed at suitable positions on the outer peripheral wall of the stem portion 21 of the valve stem 20, for example, two first tangential planes 213 are formed at two positions separated by 90 degrees, and a second tangential plane 614 is formed on the inner peripheral wall of the sleeve hole 61 of the stopper 60a, so that when the valve stem 20 is assembled in the valve housing 10, the inner peripheral wall of the sleeve hole 61 of the stopper 60a may be selectively nested and attached to one of the first tangential planes 213 at the first angular position P1, or nested and attached to the other first tangential plane 213 at the second angular position P2.

Of course, the identification mark 16 of the first embodiment may be provided in different positions, for example, in the vicinity of one of the arc-shaped limiting grooves 14 of the outer peripheral wall of the valve housing 10, so as to serve as a reference point for the limiting element 60a when determining the assembling position.

It should be noted that the through hole 12 of the valve housing 10 of the first embodiment may be designed in a shaft hole shape so as to be pivotally positioned with respect to each other directly at the connection between the stem portion 21 and the valve portion 22 of the valve stem 20. The through hole 12 of the valve housing 10 of the second embodiment is significantly larger than the diameter of the stem 21 of the valve rod 20, so that the valve rod 20 is mainly pivotally positioned with the through hole 12 of the valve housing 10 by a bushing 210 inserted and positioned on the stem 21, as shown in fig. 12 to 14, but the above structure is the prior art, and is not the structural technology that the present invention intends to protect, and is specifically described herein.

While the utility model has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various alternatives and modifications can be made therein in light of the above teachings; accordingly, all such alternatives and modifications as may be devised based on the disclosure herein are intended to be included within the spirit and scope of the present claims.

Claims (18)

1. A valve core comprises a valve shell, a valve body and a valve core, wherein the valve shell is provided with an inner cavity and a through hole communicated with the inner cavity, and the wall around the inner cavity is provided with at least one water through hole; a valve stem rotatably mounted to the valve housing and having a stem portion and a valve portion connected, the stem portion passing through the bore of the valve housing from bottom to top, the valve portion being sealed to an inner peripheral wall of the internal chamber; the movable ceramic plate can be driven by the bottom of the valve rod to rotate; the static ceramic plate is fixed on the peripheral wall of the inner cavity below the movable ceramic plate, is provided with at least one water flow channel and can be closed and blocked or opened by the movable ceramic plate; the sealing washer is arranged in the valve shell below the static ceramic plate; it is characterized in that the preparation method is characterized in that,

the valve shell is provided with two opposite arc-shaped limiting grooves; the valve cartridge further includes:

the limiting piece is provided with a sleeving hole and two opposite limiting convex parts; the limiting member may be selectively sleeved and fixed to the rod portion of the valve rod at a first angular position or a second angular position through the sleeving hole, and at the first angular position, the limiting protrusion may be received and limited in the arc-shaped limiting groove corresponding to each of the valve housing, so as to allow the valve rod to rotate from the closed position to the maximum opening position along the clockwise direction, and at the second angular position, the limiting protrusion may be received and limited in the arc-shaped limiting groove corresponding to each of the valve housing, so as to allow the valve rod to rotate from the closed position to the maximum opening position along the counterclockwise direction.

2. The valve cartridge according to claim 1, wherein an installation groove is formed in the valve housing above the through hole, the installation groove defines an inlet, and an inner circumferential wall of the installation groove is radially protruded with two opposite protruding ribs for defining the arc-shaped limiting groove between the protruding ribs; the limiting part is in a sleeve shape, the sleeve hole can be formed in the center, two opposite convex blocks are arranged on the outer circumferential wall in a radial protruding mode and used for forming the limiting convex part, the sleeve hole of the limiting part can be nested in the rod part of the valve rod from top to bottom, and the limiting convex part can be accommodated into the arc limiting grooves from top to bottom, wherein the arc limiting grooves are opposite to each other.

3. The valve cartridge according to claim 2, wherein the top edge of the rib of the mounting groove is spaced apart from the inlet port by a distance; the top end of the peripheral wall of the limiting piece is provided with a lip edge which can be nested and positioned in the interval so as to be mutually abutted and sealed with the inner peripheral wall of the mounting groove.

4. The valve cartridge of claim 2, wherein the stem portion peripheral wall of the valve stem is non-circular; the sleeve hole of the limiting part can be embedded and fixed on the peripheral wall of the rod part in a matched manner, so that the limiting part can rotate along with the valve rod.

5. The valve cartridge according to claim 4, wherein the stem portion peripheral wall of the valve stem and the receiving hole of the retainer are designed to be square, and the first angular position and the second angular position are different by 90 degrees.

6. The valve core according to claim 5, wherein each outer wall surface of the rod part of the valve rod is provided with a longitudinal rib part in a protruding mode at a position close to the lower part of the outer wall surface; each inner wall surface of the sleeve hole of the limiting part is also respectively concavely provided with a longitudinal clamping groove which extends upwards from the bottom edge for a certain distance and is in a closed groove shape, and the longitudinal rib part can be allowed to be embedded and plugged into each longitudinal clamping groove from bottom to top.

7. The valve cartridge according to claim 2, wherein the valve housing is further provided with an identification mark on a periphery of the insertion port thereof as a reference point of the stopper at the time of determining the assembly position.

8. The valve cartridge according to claim 4, wherein a fastening structure capable of being fastened and positioned with each other is disposed between the outer wall surface of the rod portion of the valve rod and the inner wall surface of the sleeve hole of the limiting member.

9. The valve cartridge according to claim 8, wherein the valve stem has a cross section of a substantially square shape, and two opposite wall surfaces of the stem portion are respectively provided with a protruding hook-shaped locking block, and an inner peripheral wall of the receiving hole of the position-limiting member is provided with a recessed ring-shaped locking groove for locking and positioning the locking block therein, so as to form the locking structure.

10. The valve cartridge according to claim 1, wherein the limiting member mounted at the first angular position and the limiting member mounted at the second angular position are designed to be different colors, respectively.

11. The valve cartridge of claim 1, wherein said valve housing peripheral wall is formed with two opposed openings above said through hole thereof for forming said arcuate retainer groove; the limiting part is in a ring sheet shape, the sleeving hole can be formed in the center, two opposite lugs are arranged on the outer circumferential wall in a protruding mode in the radial direction and used for forming the limiting convex part, the limiting part can be placed into the valve shell from one of the arc-shaped limiting grooves in advance, the rod part of the valve rod can penetrate through the sleeving hole from bottom to top and can be fixed in the sleeving hole in an embedded mode, and the limiting convex part is contained and limited in the arc-shaped limiting groove.

12. The valve cartridge of claim 11, wherein the stem portion peripheral wall of the valve stem is non-circular; the sleeve hole of the limiting part can be embedded and fixed on the peripheral wall of the rod part in a matched manner, so that the limiting part can rotate along with the valve rod.

13. The valve cartridge according to claim 12, wherein the stem portion peripheral wall of the valve stem and the receiving hole of the retainer are designed to be square, and the first angular position and the second angular position are different by 90 degrees.

14. The valve cartridge of claim 13, wherein the retainer is a metal stamping and four reinforcing lips are axially stamped into the socket.

15. The valve cartridge of claim 12, wherein the stem portion peripheral wall of the stem has a plurality of first teeth distributed circumferentially in an array; the inner peripheral wall of the sleeve hole of the limiting part is distributed with a plurality of second engaging teeth along the circumferential direction, and the second engaging teeth can be mutually meshed with the first engaging teeth in a sleeve mode.

16. The valve cartridge according to claim 12, wherein the stem portion peripheral wall of the stem is formed with two first tangential planes; the inner peripheral wall of the sleeving hole of the limiting part is provided with a second tangent plane, and the first tangent plane can be selectively sleeved and jointed with one of the first tangent planes at the first angle position or sleeved and jointed with the other first tangent plane at the second angle position.

17. The valve cartridge of claim 16, wherein the first tangential planes are separated by an angle of 90 degrees.

18. The valve cartridge of claim 11, wherein the valve housing peripheral wall is further provided with an identification mark in the vicinity of one of the arc-shaped retainer grooves as a reference point of the retainer when determining the assembly position.

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