CN100428906C - A pressure conversion device for an electric pressure cooker - Google Patents

Abstract

A pressure conversion device for an electric pressure cooker, comprising a pot cover, an elastic sealing sleeve and a pressure transmission device; the elastic sealing sleeve is fixed and sealed on the hole wall of the pot cover, and the pressure transmission device is arranged in the elastic sealing sleeve. The pressure transmission device includes a bushing, a transmission rod and a rotating output shaft, the bushing is embedded in an elastic sealing sleeve; the transmission rod and the transmission rod movably pass through the side wall of the bushing and extend horizontally into the bushing ; The rotary output shaft is connected with a transmission rod that can drive it to rotate in the vertical direction. The invention has the advantages of safety, reliability and high control precision, and is widely used in various electric pressure cookers as a pressure conversion device of the electric pressure cooker.

Description

A pressure conversion device for an electric pressure cooker

technical field

The invention relates to an electric pressure cooker, in particular to a pressure conversion device of the electric pressure cooker.

Background technique

As a kind of electric cooking utensil, the electric pressure cooker works under high pressure. In order to ensure the safety of the electric pressure cooker, the pressure in the electric pressure cooker must be controlled so that the pressure in the electric pressure cooker does not exceed a certain dangerous value. The pressure inside the pressure cooker is converted into corresponding mechanical parameters or electrical parameters, and then the feedback control of the pressure inside the cooker is completed by the relevant mechanical device or electronic circuit, which is one of the key links to finally realize the pressure control of the pressure cooker.

The pressure conversion device of the traditional electric pressure cooker, such as the Chinese invention patent named "Fully Sealed Automatic Multifunctional Electric Cooker" with the patent number CN91100026.7, mainly adopts a "mouth"-shaped rigid structure. value, the inner pot of the electric pressure cooker expands and deforms under high pressure, and is forced to move down. This deformation can drive the deformation of the elastic part at the lower part of the inner pot. That is to say, the pressure in the pot is finally converted into Deformation parameters, and then use this parameter to drive pressure control devices, such as micro switches, temperature control and pressure control components and other pressure control devices, to force the pressure control device to act, cut off the main power supply, and complete the pressure control function. The main disadvantages of this technology are: the inner pot and the elastic parts at the bottom of the inner pot are compressed and swelled and deformed frequently, and move up and down, which easily leads to the deformation of the inner pot and the elastic parts at the bottom, and the service life is short.

In order to solve the defect that the pressure conversion device is arranged at the bottom of the inner pot, the existing technology such as the patent No. 200520056869.4, the Chinese patent named "A Kind of Automatic Electric Pressure Cooker", as shown in Figure 1, removes some common components of the electric pressure cooker, such as Inner pot, medium pot, outer shell, electric heating plate, etc., the main features of this technology are that a return spring 9, a lever seat 10, an adjusting screw, a sealed pressure valve 12, a seesaw lever mechanism 13 and a magnet 14 are arranged on the pot cover 2 . Its core pressure conversion device is exactly a sealed pressure valve 12 and a seesaw lever mechanism 13 . When the pressure of the inner pot changes, the sealed pressure valve 12 pushes the seesaw lever mechanism 13 and drives the magnet 14 to move up and down, that is, the pressure of the inner pot is finally converted into the position parameter of the magnet 14 moving up and down. When the magnet 14 approaches the sensing element 15, a control signal is given to the control circuit connected to the sensing element 15, thereby controlling the pressure in the pot.

The disadvantage of this control method is that the mechanical amplification factor of the seesaw lever mechanism is not stable enough, resulting in the displacement variation of the sealed pressure valve 12, that is, only one control signal reflects the parameter of the pressure in the pot, and it cannot be stably and accurately determined. Transfer to the magnet 14, resulting in a large control error and too few control points.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention proposes a safe, reliable and high control precision electric pressure cooker pressure conversion device.

In order to achieve the above-mentioned technical purpose, the present invention has taken following technical scheme:

A pressure conversion device for an electric pressure cooker, comprising a pot cover 2, an elastic sealing sleeve 1 and a pressure transmission device; the elastic sealing sleeve 1 is fixed and sealed on the hole wall of the hole 20 of the pot cover 2, and the pressure transmission device It is arranged in the elastic sealing sleeve 1, and is characterized in that: the pressure transmission device includes a main bush 31, a transmission rod 4, a return spring 5 and a rotating output shaft 7; the main bush 31 is embedded in the elastic sealing sleeve 1; The transmission rod 4 can move horizontally through the side wall hole of the main bush 31 and extend into the main bush 31; the rotary output shaft 7 is connected to the transmission rod 4 that can drive it to rotate in the vertical direction. Connection; the return spring 5 is set between the transmission rod 4 and the main bushing 31 or on the rotary output shaft 7 .

The above-mentioned pot cover 2 is provided with a hole 20 , and the above-mentioned elastic sealing sleeve 1 is sealed and fixed on the pot cover 2 through the hole 20 . The elastic sealing sleeve 1 is a relatively soft elastic rubber member resistant to high temperature and high pressure, and its shape is in the shape of a cylinder to ensure that it fits with the shape of the main bush 31 or/and auxiliary bush 32 described below. The lower part of the elastic sealing sleeve 1 is closed and extends into the inner space of the pot cover 2, and the upper part is open. The elastic sealing sleeve 1 mainly accommodates the pressure transmission device of the present invention. There are many ways for the elastic sealing sleeve 1 to be sealed and fixed on the pot cover 2, for example, a double-lip edge 1A is set at the upper opening, and the upper and lower lips of the double-lip edge 1A are embedded in the hole wall where the hole 20 is located, thereby realizing Sealing; it is also possible to assist in fixing the pressing lip edge 1A on the hole wall where the hole 20 is located by adopting methods such as a gland and a pressure ring.

The above-mentioned pot cover 2 is a common component of the electric pressure cooker, which is used to seal the inner pot of the electric pressure cooker, so that the inner pot of the electric pressure cooker has good airtightness.

The above-mentioned pressure transmission device is arranged in the elastic sealing sleeve 1, and the pressure transmission device includes a main bush 31, a transmission rod 4 and a rotary output shaft 7, and its structure is as follows:

(1). The main bushing 31 is embedded in the elastic sealing sleeve 1;

The above-mentioned main bushing 31 is a cylindrical body with an open top, which is embedded and fixed in the elastic sealing sleeve 1, so that the elastic sealing sleeve 1 is squeezed by the outer wall of the main bushing 31 against the elastic sealing sleeve 1. The double-lip edge 1A of sleeve 1 forms a reliable seal with the hole wall surface of hole 20 of pot cover 2; secondly, on the top of main bushing 31, flange edge or lip-shaped edge 3A can also be set, which can pass through the lip The edge 3A is pressed on the double-lip edge 1A of the elastic sealing sleeve 1, so that the sealing effect between the sealing sleeve 1 and the pot cover 2 can be enhanced, and the main bush 31 can be prevented from being damaged by external force during use. The effect falls completely into the bottom of the sealing sleeve 1 . In order to securely fix the main bush 31 , a pressure ring 8 may also be arranged on the top of the main bush 31 . The pressure ring 8 can be mechanically connected to the pot cover 2 or other suitable fixtures.

The side wall of the above-mentioned main bush 31 is opened to form a side wall hole of the main bush 31 , and the center line of the side wall hole is perpendicular to the center line of the cavity of the main bush 31 . The side wall holes are used to accommodate and support the auxiliary bushing 32 , the guide sleeve 6 or the transmission rod 4 described below, so as to facilitate the movement of the transmission rod 4 in the horizontal direction.

”或“

”状；也可以穿过主衬套31的侧壁孔安装在该侧壁的两边；还可以是，将辅助衬套32垂直固定设置在主衬套31的内侧壁，则主衬套31与辅助衬套32连接后，主衬套31外表就不会呈“

”或“”状，而是筒形，也是等同的结构。If the thickness of the side wall of the main bush 31 is not enough to ensure the smooth and reliable horizontal movement of the transmission rod 4 , an auxiliary bush 32 may also be provided. The auxiliary bush 32 is a component vertically fixedly connected with the side wall of the main bush 31 at the position of the side wall hole of the main bush 31 . After the main bush 31 is connected with the auxiliary bush 32 , the central through hole of the auxiliary bush 32 is connected with the sidewall hole of the main bush 31 , so that the transmission rod 4 passes through the auxiliary bush 32 and horizontally extends into the main bush 31 . The connection method of the main bush 31 and the auxiliary bush 32 can be threaded connection, welding, or integral molding during manufacture, as long as the two can be reliably connected. Secondly, the auxiliary bushing 32 can only be installed on the outer side wall of the main bushing 31. After the main bushing 31 is connected with the auxiliary bushing 32, the outside of the main bushing 31 is "

"or"

"shape; can also pass through the side wall hole of the main bush 31 and be installed on both sides of the side wall; it can also be that the auxiliary bush 32 is vertically fixed on the inner side wall of the main bush 31, then the main bush 31 and After the auxiliary bushing 32 is connected, the appearance of the main bushing 31 will not be "

"or" " shape, but a cylindrical shape, which is also an equivalent structure.

(2). The transmission rod 4 can move horizontally through the side wall hole of the main bush 31 and extend into the main bush 31; Rod 4 transmission connection.

The transmission rod 4 is a component that senses and transmits the pressure in the pot, and is in the shape of a bolt rod, with a protruding top end and a diameter larger than the rod portion. Part of the cross-section of the rod part of the transmission rod 4 is in the shape of a semicircle or a rectangle, so that the transmission rod 4 can rotate radially when it moves horizontally; 1 Induction and transmission of pressure in the pot. The transmission rod 4 passes through the side wall hole of the main bush 31 or the center hole of the auxiliary bush 32 and extends into the main bush 31 . When the pressure inside the pot rises, the elastic sealing sleeve 1 is compressed, pushing the transmission rod 4 to move into the main bushing 31, thereby pushing the output shaft 7 of the rear stage to rotate in the vertical direction. The connection mode between the top end of the transmission rod 4 and the elastic sealing sleeve 1 can also be that the top end 41A of the transmission rod 4 is arranged on the outside of the elastic sealing sleeve 1, the rod portion of the transmission rod 4 is located on the inside of the elastic sealing sleeve 1, and the transmission rod 4 The top end 41A passes through and clamps the side wall of the elastic sealing sleeve 1, and is connected with the protruding flange 41C of the transmission rod 4 through thread 41B, etc., and tightens and seals the elastic sealing sleeve 1.

In order to make the transmission rod 4 drive the pressure in the pot in the horizontal direction to be stable, and also to reduce the wear of the side wall hole of the main bush 31 or the inner hole of the auxiliary bush 32 when the transmission rod 4 moves in the horizontal direction, the main bush 31 In the side wall hole or the central hole of the auxiliary bushing 32, the guide sleeve 6 is set. The transmission rod 4 moves in the guide sleeve 6 . However, if the mechanical strength and design dimensions of the side wall hole of the main bush 31 or the auxiliary bush 32 can ensure the smooth transmission of the transmission rod 4 in the horizontal direction, the guide sleeve 6 can also be omitted.

The function of the guide sleeve 6 is to carry the transmission rod 4, so that the transmission rod 4 can move in a prescribed track without jumping, and it can provide convenience for the transmission connection between the transmission rod 4 and the rotary output shaft 7. For this reason, in order to achieve this purpose, in terms of mechanical design, there are also various structures of the guide sleeve 6 . For example, the guide sleeve 6 can be designed as a long tube, about half of the tube wall is removed in the middle section of the tube to form a half-walled tube, and the guide sleeve 6 straddles the main bush 31 . In this way, the transmission rod 4 can be carried and the movement track of the transmission rod 4 can be fixed, and the transmission rod 4 and the rotary output shaft 7 can form a transmission connection. It is also possible to divide the guide sleeve 6 into two sections, the middle part is vacant, and one section is fixed in the main bush 31 and coaxially fitted with the side wall hole of the main bush 31 or the center hole of the auxiliary bush 32 fixed, and the other section is fixed in the main bush 31 at the symmetrical position with the side wall hole of the main bush 31 or the central hole of the auxiliary bush 32 . In the case of setting the guide sleeve 6 with such a separate structure, at the side wall hole of the main bush 31, the auxiliary bush 32 and the guide sleeve 6 can be two separate components, or they can be combined into the same component. .

The central hole of the guide sleeve 6 can be a circle, or a shape suitable for the transmission rod 4 such as a rectangle.

The rotary output shaft 7 is a component that senses the horizontal displacement of the transmission rod 4 and converts the horizontal displacement into a vertical rotation. The rotational displacement output by the rotary output shaft 7 is transmitted to the next-stage rotational displacement receiving device. The lower end of the rotary output shaft 7 is rotatably fixed on the lower part of the main bush 31 , and the output shaft end is rotatably fixed by a fixed bracket 9 arranged on or above the main bush 31 . The up and down rotation supporting points of the rotary output shaft 7 can adopt a sliding bearing structure, and also can adopt a ball bearing structure. The fixing bracket 9 can be fixedly connected with the main bushing 31 or the pressure ring 8, and can also be directly fixed on the pot cover 2 or other suitable fixing parts.

In order to convert the horizontal displacement of the transmission rod 4 into the vertical rotation displacement of the rotary output shaft 7, many methods can be adopted in terms of mechanical design.

(A) Toothed drive. A gear 71 is fixedly arranged at the bottom of the rotation output shaft 7, and a rack 4A is set on the transmission rod 4 at a position corresponding to the gear 71. When the transmission rod 4 moves in the horizontal direction, through the meshing transmission of the rack 4A and the gear 71, the gear rack 4A and the gear 71 are engaged. The horizontal displacement of the transmission rod 4 is converted into the rotational displacement of the rotary output shaft 7 in the vertical direction.

(B) Rocker arm drive. The bottom of the rotating output shaft 7 arranged in the vertical direction is coaxially arranged with a crankshaft 72 , and the transmission rod 4 moving in the horizontal direction is movably connected with a rocker arm 42 , and the rocker arm 42 is movably connected with the crankshaft 72 . When the transmission rod 4 moves in the horizontal direction, the horizontal displacement is transmitted to the crankshaft 72 through the rocker arm 42 movably connected with it, and the crankshaft 72 is driven to rotate, so that the horizontal displacement is converted into the vertical rotation of the rotary output shaft 7 .

(C) Arm drive. The bottom of the rotating output shaft 7 arranged in the vertical direction is vertically fixedly provided with a support arm 73 , and the transmission rod 4 moving in the horizontal direction is movably connected with a rocking arm 42 , and the rocking arm 42 is movably connected with the support arm 73 . In this way, the horizontal movement of the transmission rod 4 can also be converted into the vertical rotation movement of the rotary output shaft 7 .

(D) Slip drive. The lower part of the rotating output shaft 7 arranged in the vertical direction is vertically connected with a wing plate 74, and a long chute 74A can also be set radially on the wing plate 74, so that the end of the transmission rod 4 is supported on the wing plate 74. Or slide along the strip chute 74A on the wing plate 74 . When the transmission rod 4 moves horizontally, the flap 74 is pushed to drive the rotary output shaft 7 to rotate vertically.

(3). The return spring 5 is arranged between the transmission rod 4 and the main bush 31 or on the rotation output shaft 7 .

In order to make the above-mentioned transmission device have a reset function, reduce vibration during rotation, and form a balanced damping effect on the rotation mechanism, the above-mentioned return spring 5 can be arranged between the transmission rod 4 and the main bush 31, the auxiliary bush 32 or the guide sleeve 6 between. The return spring 5 is inserted into the transmission rod 4, one end withstands the head of the transmission rod 4, and the other end withstands the end of the guide sleeve 6, the side wall of the main bush 31 or the groove provided in the auxiliary bush 32. Secondly, the above-mentioned return spring 5 can also be sleeved on the output shaft of the rotary output shaft 7, and its first free end is fixed on the main bush 31, the pressure ring 8, the fixed bracket 9 or the pot cover 2, and the other free end is fixed On the output shaft of the output shaft 7. In this way, when the transmission rod 4 is pressed into the main bush 31 to complete its pressure detection process, when the pressure in the pot drops, the pre-compressed elastic force of the return spring 5 is released, pushing the transmission mechanism and the transmission rod 4 to reset, and also makes When the rotating output shaft 7 rotates forward and backward, it moves smoothly due to the damping effect of the return spring, and can be reset.

The aforementioned main bush 31 and auxiliary bush 32 are fixedly connected, but it does not mean that the main bush 31 and the auxiliary bush 32 must be connected vertically at 90 degrees in the axial direction of the main bush 31 . The angle between the main bush 31 and the auxiliary bush 32 can be slightly less than 90 degrees, which is also an equivalent application, as long as the angle is less than 90 degrees, it does not affect the ability of the transmission rod 4 to convert its linear motion into a rotary output A rotational movement of the axis 7 is sufficient. For example, in the case of toothing transmissions, a straight tooth in the case of horizontal movement would be a helical tooth of a corresponding angle in the case of non-horizontal movement.

In addition, in order to limit the rotation stroke of the rotary output shaft 7 , a limit block can be provided in the main bush 31 or on the fixing bracket 9 or other suitable fixing accessories. The limit block can limit the left and right radial rotation range of the rotary output shaft 7 .

The output shaft end of the above-mentioned rotary output shaft 7 can be fixedly connected with the rotating member 12, which is a long rotating arm, and the end of the rotating arm of the rotating member 12 can be fixedly connected with the sensing element 13. The control device of the electric pressure cooker realizes the inner pot pressure of the electric pressure cooker by sampling the rotational displacement signal of the rotating output shaft 7, or sampling the displacement signal of the rotating member 12, or sampling the signal of the inductive element 13 at the end of the rotating arm of the rotating member 12. control.

In this way, the pressure parameters in the electric pressure cooker are finally converted into the horizontal position parameters of the sensing element 13 or the end of the rotating long arm of the rotating member 12, and then other mechanical devices or electronic control circuits are assisted to control the pressure in the electric pressure cooker. Realize multi-point detection or control with high control precision.

In summary, the features of the present invention are: (1) safe and reliable. The pressure conversion device installed on the lid of the pressure cooker is used for pressure conversion and transmission, which avoids the need to rely on the deformation displacement of the inner pot and other components to transmit and detect during the working process of the traditional pressure cooker, and avoids the deformation and displacement of the inner pot and other components. The possible safety accidents also avoid the rapid aging and damage of the inner pot caused by frequent deformation of the inner pot, which greatly prolongs the life of the inner pot and the middle pot; (2) high control precision. The pressure conversion device adopted in the present invention has a small gap, reliable mechanical structure and stable transmission, and the size of the air pressure in the pot can be accurately reflected on the mechanical position change of the induction device 13 or the end of the rotating long arm of the rotating member 12, and the air pressure-mechanical conversion is completed. In the link of enlargement, through the external auxiliary mechanism of the present invention, the air pressure control in the pot can be realized stably and reliably. (3) The detection or control of multiple control points can be realized for the pressure in the electric pressure cooker.

Due to the above features, the present invention can be widely used in various pressure cookers, especially electric pressure cookers, as a pressure conversion device for electric pressure cookers.

Description of drawings

Fig. 1 is the structural representation of prior art;

Fig. 2 is the three-dimensional structural assembly schematic diagram of the present invention;

Fig. 3 is a structural schematic diagram of the elastic sealing sleeve of the present invention;

Fig. 4 is a schematic diagram of the assembled structure of the main bush, the return spring and the transmission rod of the present invention;

Fig. 5 is a schematic diagram of the toothing transmission structure of the present invention;

Fig. 6 is a structural schematic diagram of the transmission rod of the toothed transmission structure of the present invention;

Fig. 7 is a structural schematic diagram of the guide sleeve of the toothed transmission structure of the present invention;

Fig. 8 is a structural schematic diagram of the rotating output shaft of the toothed transmission structure of the present invention;

Fig. 9 is a structural schematic diagram of the pressure ring of the present invention;

Fig. 10 is a schematic structural view of the fixed bracket of the rotary output shaft of the present invention;

Fig. 11 is a schematic diagram of the rocker arm transmission structure of the present invention;

Fig. 12 is a schematic diagram of the transmission structure of the support arm of the present invention;

Fig. 13 is a schematic diagram of the sliding transmission structure of the present invention.

Fig. 14 is a schematic view of the split structure of the transmission rod of the present invention.

Detailed ways

The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 2, a pressure conversion device of an electric pressure cooker comprises a pot cover 2, an elastic sealing sleeve 1 and a pressure transmission device; The inner pot of the pressure cooker has good airtightness; the elastic sealing sleeve 1 is fixed and sealed on the hole wall of the hole 20 of the pot cover 2, the pressure transmission device is arranged in the elastic sealing sleeve 1, and the pressure transmission The device includes a main bush 31, a transmission rod 4, a return spring 5 and a rotary output shaft 7; the main bush 31 is embedded in the elastic sealing sleeve 1; the transmission rod 4 can move through the main bush 31 The side wall hole extends horizontally into the main bushing 31; the rotary output shaft 7 is connected to the transmission rod 4 that can drive it to rotate in the vertical direction.

As shown in FIG. 3 , the elastic sealing sleeve 1 is in the shape of a cylinder, which fits well with the shapes of the main bush 31 and the auxiliary bush 32 . The lower part of the elastic sealing sleeve 1 is closed and extends into the inner space of the pot cover 2, and the upper part is open. The upper opening of the elastic sealing sleeve 1 is provided with a double-lip edge 1A, and the upper and lower lips of the double-lip edge 1A are embedded in the hole wall where the hole 20 is located, so as to realize sealing.

As shown in FIG. 2 and FIG. 5 , the pressure transmission device is arranged in the elastic sealing sleeve 1 , and the pressure transmission device includes a main bush 31 , a transmission rod 4 and a rotary output shaft 7 .

As shown in Figure 4, the above-mentioned main bushing 31 is a cylindrical body with an open top, which is embedded and fixed in the elastic sealing sleeve 1, so that the double lip edge 1A of the elastic sealing sleeve 1 is in contact with the pot cover 2 The contact part of the hole wall surface of the hole 20 forms a reliable seal; secondly, on the upper part of the main bush 31, a flange or a lip 3A is set, and the lip 3A is pressed against the double lips of the elastic sealing sleeve 1 1A, in this way, the sealing effect between the sealing sleeve 1 and the pot cover 2 can be enhanced, and the main bush 31 can be prevented from completely falling into the bottom of the sealing sleeve 1 due to external force during use. As shown in FIG. 5 , in order to securely fix the main bush 31 , a pressure ring 8 is arranged on the top of the main bush 31 . The pressure ring 8 can be mechanically connected to the pot cover 2 .

As shown in Figure 4, the side wall of the main bush 31 is perforated to form the side wall hole of the main bush 31, and the center line of the side wall hole is perpendicular to the center line of the cavity of the main bush 31, but deviates from the center line of the main bush 31. Set a certain distance from the center line of the cavity of the sleeve 31. The auxiliary bushing 32 is installed on the outer side wall of the main bushing 31. After the main bushing 31 is connected with the auxiliary bushing 32, the outside of the main bushing 31 is " ” shape; after the main bush 31 is connected with the auxiliary bush 32, the central through hole of the auxiliary bush 32 is connected with the side wall hole of the main bush 31, so that the transmission rod 4 passes through the auxiliary bush 32 and extends horizontally into the main bush 31 In the central hole of the auxiliary bushing 32, a guide sleeve 6 is set, and the return spring 5 is arranged between the transmission rod 4 and the guide sleeve 6. The function of the guide sleeve 6 is to carry the transmission rod 4, so that the transmission rod 4 is within the specified track movement, without jumping, and can provide convenience for forming a transmission connection between the transmission rod 4 and the rotary output shaft 7 .

As shown in Figure 4, the transmission rod 4 is a component that senses and transmits the pressure in the pot, and is in the shape of a bolt rod, with a protruding top end and a diameter larger than the rod portion. The top end of the transmission rod 4 is close to the inner wall of the elastic sealing sleeve 1 and senses and transmits the inner pressure of the pot through the elastic sealing sleeve 1 . The transmission rod 4 passes through the center hole of the guide sleeve 6 and extends into the main bush 31 . When the pressure inside the pot rises, the elastic sealing sleeve 1 is compressed, pushing the transmission rod 4 to move into the main bushing 31, thereby pushing the output shaft 7 of the rear stage to rotate.

As shown in Figure 14, the connection method between the top end of the transmission rod 4 and the elastic sealing sleeve 1 can also be that the top end 41A of the transmission rod 4 is arranged on the outside of the elastic sealing sleeve 1, and the rod portion of the transmission rod 4 is located on the elastic sealing sleeve. 1, the top end 41A of the transmission rod 4 passes through and clamps the side wall of the elastic sealing sleeve 1, and is connected with the protruding flange 41C of the transmission rod 4 through the thread 41B, and the elastic sealing sleeve 1 is tightened and sealed.

As shown in FIGS. 5 and 8 , the rotary output shaft 7 is a component that senses the horizontal displacement of the transmission rod 4 and converts the horizontal displacement into a vertical rotational movement. The rotational displacement output by the rotary output shaft 7 is transmitted to the next-stage rotational displacement receiving device. The lower end of the rotary output shaft 7 is rotatably fixed on the lower part of the main bush 31 , and the output shaft end is rotatably fixed by a fixed bracket 9 arranged on the main bush 31 . The rotary support point of the rotary output shaft 7 adopts a sliding bearing and a ball bearing structure.

In order to convert the horizontal displacement of the transmission rod 4 into the vertical rotational displacement of the rotary output shaft 7 , in terms of mechanical design, the following implementation schemes can be adopted.

(A) Toothed drive. As shown in Figures 5, 6, 7 and 8, a gear 71 is fixed at the bottom of the rotating output shaft 7 set in the vertical direction, and a rack 4A is set on the transmission rod 4 corresponding to the gear 71, and the transmission rod 4 moves in the horizontal direction At this time, the horizontal displacement of the transmission rod 4 is converted into the vertical rotation displacement of the rotary output shaft 7 through the meshing transmission of the rack 4A and the gear 71 . The guide sleeve 6 is designed as a long tubular shape, about half of the pipe wall is removed from the middle section of the pipe to form a half-walled pipe, and the guide sleeve 6 straddles the main bush 31 . In this way, the transmission rod 4 can be carried and the movement track of the transmission rod 4 can be fixed, and the transmission rod 4 and the rotary output shaft 7 can form a transmission connection.

(B) Rocker arm drive. As shown in FIG. 11 , a crankshaft 72 is arranged coaxially at the bottom of the rotating output shaft 7 arranged in the vertical direction, and the transmission rod 4 moving in the horizontal direction is movably connected to the rocker arm 42 through a pin 42A, and the other end of the rocker arm 42 is movably connected to the crankshaft 72 . When the transmission rod 4 moves horizontally, the horizontal displacement is transmitted to the crankshaft 72 through the rocker arm 42 movably connected with it, and the crankshaft 72 is driven to rotate, so that the horizontal displacement is converted into the vertical rotation of the rotary output shaft 7 .

(C) Arm drive. As shown in Figure 12, the lower part of the rotating output shaft 7 arranged in the vertical direction is vertically fixedly connected to the support arm 73, and the transmission rod 4 moving in the horizontal direction is movably connected to the rocker arm 42 through the pin 42A, and the other end of the rocker arm 42 passes through the support arm 73. Pin 42B is articulated. In this way, when the transmission rod 4 moves horizontally, it pushes the rotary output shaft 7 to rotate vertically.

(D) Slip drive. As shown in Figure 13, the lower part of the rotary output shaft 7 arranged in the vertical direction is vertically fixed to the wing plate 74, and at the same time, a long chute 74A can be set in the radial direction of the wing plate 74, and two pins are set at the end of the transmission rod 4. 74B, the pin 74B is stuck on both sides of the wing plate 74, and the transmission rod 4 slides along the strip chute 74A on the wing plate 74 through the pin 74B. When the transmission rod 4 moves horizontally, the flap 74 is pushed to drive the rotary output shaft 7 to rotate vertically.

Secondly, on the output shaft of the rotary output shaft 7, a return spring 5 (not shown in the figure) is set at the same time. The return spring 5 is set on the rotary output shaft 7, its first free end is fixed on the main bush 31, the pressure ring 8, the fixed bracket 9 or the pot cover 2, and the other free end is fixed on the output shaft of the rotary output shaft 7 . In this way, when the rotation output shaft 7 rotates in the positive and negative directions, it moves smoothly due to the damping effect of the return spring 5 and can be reset.

As shown in FIG. 2 , the output shaft end of the above-mentioned rotary output shaft 7 is fixedly connected to the rotating member 12 , and the end of the rotating arm of the rotating member 12 may be fixedly connected to the sensing element 13 . The control device of the electric pressure cooker realizes the inner pot pressure of the electric pressure cooker by sampling the rotational displacement signal of the rotating output shaft 7, or sampling the displacement signal of the rotating member 12, or sampling the signal of the inductive element 13 at the end of the rotating arm of the rotating member 12. control.

In this way, the pressure parameter in the electric pressure cooker is finally converted into the horizontal position parameter at the end of the long arm of the rotating member 13 or rotating member 12, and then assisting other mechanical devices or electronic control circuits, the pressure in the electric pressure cooker can be adjusted in multiple ways. Point detection or control with high control accuracy.

Claims (17)

1. A pressure conversion device of an electric pressure cooker, comprising a pot cover (2), an elastic sealing sleeve (1) and a pressure transmission device; the elastic sealing sleeve (1) is fixedly sealed in the hole (20) of the pot cover (2) ) on the hole wall, the pressure transmission device is arranged in the elastic sealing sleeve (1), characterized in that: The pressure transmission device includes a main bush (31), a transmission rod (4), a return spring (5) and a rotary output shaft (7); The main bushing (31) is embedded in the elastic sealing sleeve (1); The transmission rod (4) can move horizontally through the side wall hole of the main bush (31) and extend into the main bush (31); The said rotary output shaft (7) is transmission connected with the transmission rod (4) which can drive it to rotate in the vertical direction; The return spring (5) is arranged between the transmission rod (4) and the main bush (31) or on the rotation output shaft (7). 2. A pressure conversion device for an electric pressure cooker according to claim 1, characterized in that: a rack (4A) is arranged on the transmission rod (4), and the rack (4A) is connected to the rotating output shaft (7) The gear (71) gear (71) that the lower part is provided with is geared and connected. 3. A pressure conversion device for an electric pressure cooker according to claim 1, characterized in that: a crankshaft (72) is arranged at the bottom of the rotary output shaft (7), and the transmission rod (4) is movably connected to the rocker arm (42 ), the rocking arm (42) is movably connected with the crankshaft (72). 4. A pressure conversion device for an electric pressure cooker according to claim 1, characterized in that: a support arm (73) is vertically arranged on the lower part of the rotating output shaft (7), and the transmission rod (4) is movably connected to the rocker Arm (42), rocking arm (42) is movably connected with support arm (73). 5. The pressure conversion device of a kind of electric pressure cooker according to claim 1, characterized in that: the lower part of the rotary output shaft (7) is provided with a wing plate (74) vertically; the wing plate (74) is arranged radially The chute (74A), the transmission rod (4) is movably connected with the wing plate (74) through the chute (74A). 6. A pressure conversion device for an electric pressure cooker according to claim 1, 2, 3, 4 or 5, characterized in that: the outer side wall and inner side wall at the position of the side wall hole of the main bushing (31) Both sides of the wall or side wall are vertically fixed to the auxiliary bushing (32); the transmission rod (4) can move horizontally through the central hole of the auxiliary bushing (32) and extend into the main bushing (31). 7. A pressure conversion device for an electric pressure cooker according to claim 6, characterized in that: the side wall hole of the main bush (31) or the auxiliary bush (32) is provided with a guide sleeve (6) , the transmission rod (4) can move horizontally through the center hole of the guide sleeve (6) and extend into the main bush (31). 8. A pressure conversion device for an electric pressure cooker according to claim 7, characterized in that: the guide sleeve (6) is a long strip-shaped half-wall pipe; the guide sleeve (6) straddles the main bushing (31), the drive rod (4) can movably slide in the central hole of the guide sleeve (6). 9. A pressure conversion device for an electric pressure cooker according to claim 7, characterized in that: the guide sleeve (6) is divided into two sections, one section is fixed to the side wall hole or the auxiliary bushing (31) of the main bushing (31). In the bush (32), the other section is fixed in the main bush (31) at a position symmetrical to the side wall hole of the main bush (31), and the transmission rod (4) is movable in the center hole of the guide bush (6). slide inside. 10. A pressure switching device for an electric pressure cooker according to claim 7, characterized in that: the return spring (5) is set between the transmission rod (4) and the auxiliary bushing (32) or between the Between the transmission rod (4) and the guide sleeve (6). 11. A pressure conversion device for an electric pressure cooker according to claim 1, 2, 3, 4 or 5, characterized in that: the lower end of the rotary output shaft (7) is rotatably fixed on the main bushing ( 31), the output shaft end is rotatably fixed by a fixed bracket (9) arranged on or above the main bushing (31). 12. A pressure conversion device for an electric pressure cooker according to claim 11, characterized in that: the upper and lower rotation support points of the rotation output shaft (7) are connected by sliding bearings or ball bearings. 13. A pressure conversion device for an electric pressure cooker according to claim 1, 2, 3, 4 or 5, characterized in that: the top end (41A) of the transmission rod (4) is arranged on the elastic sealing sleeve (1 ), the rod part of the transmission rod (4) is located inside the elastic sealing sleeve (1), and the top part (41A) of the transmission rod (4) passes through and clamps the side wall of the elastic sealing sleeve (1), and is connected with the transmission rod (4) ) The protruding flange (41C) of the rod part is fixedly connected by the thread (41B). 14. A pressure conversion device for an electric pressure cooker according to claim 1, 2, 3, 4 or 5, characterized in that: the upper opening of the elastic sealing sleeve (1) is provided with a double-lip edge (1A) , and the lip of the double lip edge (1A) is embedded on the hole wall where the hole (20) of the pot cover (2) is located. 15. A pressure conversion device for an electric pressure cooker according to claim 14, characterized in that: the upper part of the main bush (31) is provided with a lip (3A), and the lip (3A) is pressed against the elastic On the double lip edge (1A) of the sealing sleeve (1). 16. A pressure conversion device for an electric pressure cooker according to claim 15, characterized in that: a pressure ring (8) is arranged on the top of the main bushing (31), and the pressure ring (8) is fixed on the pot cover ( 2) on. 17. A pressure conversion device for an electric pressure cooker according to claim 1, 2, 3, 4 or 5, characterized in that a rotating member ( 12), the end of the rotating arm of the rotating member (12) is provided with an induction element (13).

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