CN217735220U

CN217735220U - Active pressure relief type linear buffer for meal furnace

Info

Publication number: CN217735220U
Application number: CN202221529948.2U
Authority: CN
Inventors: 余立明; 谭卫星
Original assignee: Risheng Kitchen Technology Guangdong Co ltd
Current assignee: Risheng Kitchen Technology Guangdong Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-11-04
Anticipated expiration: 2032-06-17

Abstract

The utility model relates to an initiative pressure release formula linear buffer. A section an initiative pressure release formula linear buffer for meal stove include: the oil cavity is divided into a rod cavity and a rodless cavity, a reset piece which is abutted to the piston assembly is arranged in the rodless cavity, the valve block is clamped between the piston assembly and the elastic block and is located in the rod cavity, the valve block is covered on an oil guide groove of the piston assembly, the other end of the elastic block is fixed with the push rod, and when the push rod is subjected to thrust exceeding a threshold value, oil liquid pushes the valve block to overcome pressure movement of the elastic block to realize pressure relief. The active pressure relief type linear buffer for the dining stove has the advantage of active pressure relief.

Description

Active pressure relief type linear buffer for meal furnace

Technical Field

The utility model relates to a buffer technical field especially relates to an initiative pressure release formula linear buffer for meal stove.

Background

The hydraulic buffer buffers and decelerates objects acting on the hydraulic buffer to stop by means of hydraulic damping, plays a certain protection role, is suitable for mechanical equipment such as hoisting transportation, elevators, metallurgy, harbor machinery, railway vehicles and the like, and is used as a safety buffer device for preventing a mechanism from being damaged due to hard collision in the working process. When the existing hydraulic buffer is used in a meal furnace, after a cover of the buffet furnace is opened to take out food, in order to ensure the temperature and the sanitation of the food, most of the existing hydraulic buffers are designed into meal furnace covers with hydraulic devices, so that a customer can slowly close the meal furnace covers without actively closing the cover after taking the food away. One of the main parts for realizing the slow closing function of the meal furnace cover is a linear buffer.

Referring to fig. 1, the conventional linear damper structure includes a housing 1a, a piston assembly 2a, a push rod 3a and a limiting plate 4a, a sealed oil chamber is disposed in the housing 1a, and the push rod 3a penetrates through the housing 1a to enter the oil chamber and is connected to the piston assembly 2a disposed in the oil chamber, so as to divide the oil chamber into a rod chamber and a rodless chamber. The piston assembly 2a comprises a piston 21a and a sealing ring 22a, wherein a large hole 211a is formed in one end, close to the rodless cavity, of the piston 21a, a small hole 212a is formed in one end, close to the rod cavity, of the piston, and the large hole 211a is communicated with the small hole 212 a. The outer side of the piston 21a is provided with an oil passing groove 213a communicated with the large hole 211a, the sealing ring 22a is movably sleeved outside the piston 21a and corresponds to the oil passing groove 213a, the sealing ring 22a is abutted to the inner wall of the shell 1a, and when the sealing ring 22a is used, the sealing ring 22a is close to or far away from the oil passing groove 213a, so that the oil passing groove 213a is sealed and communicated. The end of the piston 21a near the rod cavity is further provided with a curved and long oil guiding groove 214a communicated with the small hole 212 a. The limiting piece 4a is covered on the oil guide groove 214a and fixed with the push rod 3 a. When the push rod 3a is pushed and the sealing ring 22a is close to the oil groove 213a to be in a closed state, the linear dampers can only provide a slow release function because the oil flow must pass through the long and narrow oil guiding groove 214a. Therefore, when a guest wants to close the cover actively after taking food, the pressure inside the buffer is high due to the damping effect of the oil guide groove, and the guest can be prevented from closing the cover with high force, so that the guest can feel bad use feeling. To this end, we propose an active pressure relief linear damper for a meal furnace.

SUMMERY OF THE UTILITY MODEL

Based on this, the present invention provides an active pressure relief type linear buffer for a meal stove, which has the advantage of active pressure relief.

The utility model provides an initiative pressure release formula linear buffer for meal stove, is including the shell of seting up the oil pocket, the opening part seal of oil pocket is provided with the oil blanket, and the push rod passes the oil blanket is fixed with the piston assembly who sets up in the oil pocket, thereby will the oil pocket is separated for there being pole chamber and no pole chamber, be provided with in the no pole chamber with the piece that resets that piston assembly contradicts still includes valve block and elastic block, the valve block clamp is established between piston assembly and the elastic block and lie in there is the pole chamber, the valve block lid is established piston assembly leads on the oil groove, the other end of elastic block with the push rod is fixed, works as when the push rod receives the thrust that surpasss the threshold value, fluid promotes the valve block is overcome the pressure of elastic block removes, realizes the pressure release.

A section initiative pressure release formula linear buffer for meal stove, can satisfy meal stove lid slowly and close two kinds of service conditions of meal stove lid with the light initiative of guest under the dead weight effect simultaneously, avoid linear buffer because of life-span and the decline of performance that internal pressure sharply increases and lead to.

Furthermore, the active pressure relief type linear buffer further comprises a first limiting piece, one side of the first limiting piece is abutted against the elastic block, and the other side of the first limiting piece is fixed with the push rod. The first limiting piece limits the elastic block so that the valve plate can compress the elastic block.

Furthermore, the active pressure relief type linear buffer further comprises a second limiting piece, and the piston assembly is fixed with the push rod through the second limiting piece. The second limiting sheet limits the piston assembly.

Furthermore, the active pressure relief type linear buffer further comprises a guide block, wherein the guide block is sleeved on the outer side of the push rod and is fixedly connected with the shell. The guide block limits and guides the moving direction of the push rod, and stability is improved.

Furthermore, the reset piece is a spring, the spring is compressed and arranged in the rodless cavity, one end of the spring is abutted against the shell, and the other end of the spring is abutted against the piston assembly. The reset piece resets the push rod through the piston assembly.

For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a partial cross-sectional view of a prior art linear damper;

fig. 2 is a front view of the linear damper of the present invention;

FIG. 3 isbase:Sub>A sectional view taken along the line A-A of the linear damper of the present invention;

fig. 4 is a perspective view of the piston of the present invention;

fig. 5 is a front view of the piston of the present invention;

FIG. 6 is a partial cross-sectional view of the linear damper of the present invention with the guest actively closing the cover;

description of reference numerals: 1. a housing; 2. oil sealing; 3. a piston assembly; 31. a piston; 311. a first piston body; 3111. a first oil passing hole; 312. a second piston body; 3121. a second oil passing hole; 3122. an oil guide groove; 3123. an oil passing groove; 313. a connecting portion; 3131. mounting holes; 3132. a boss; 32. a seal ring; 33. a first gap; 4. an elastic block; 5. a valve plate; 6. a push rod; 61. a first stage; 62. a second stage; 63. a third stage; 64. positioning the boss; 71. a first limiting sheet; 72. a second limiting sheet; 8. a reset member; 9. a guide block; 10. a second gap.

Detailed Description

Referring to fig. 2-5, fig. 2 is a front view of the linear buffer of the present invention; FIG. 3 isbase:Sub>A sectional view taken along the line A-A of the linear damper of the present invention; fig. 4 is a perspective view of the piston of the present invention; fig. 5 is a front view of the piston of the present invention.

The utility model discloses an initiative pressure release formula linear buffer for meal stove, including shell 1, oil blanket 2, piston assembly 3, elastic block 4, valve block 5, push rod 6, spacing piece, reset 8 and guide block 9. An oil cavity is formed in the housing 1, and liquid (not shown) capable of generating certain damping such as hydraulic oil is filled in the oil cavity. An opening of the oil cavity is hermetically provided with an oil seal 2. The reset piece 8 drives the piston assembly 3 to move towards the opening. The piston assembly 3, the elastic block 4 and the valve block 5 are arranged in the oil cavity, are sequentially sleeved on the push rod 6 from inside to outside and move along with the push rod 6 in the oil cavity.

The piston assembly 3 is disposed in the oil chamber and is reciprocally movable along the oil chamber, and divides the oil chamber into a rod chamber and a rodless chamber. The piston assembly 3 comprises a piston 31 and a sealing ring 32 sleeved on the piston 31.

The piston 31 includes a first piston body 311, a second piston body 312, and a connecting portion 313 connecting centers of the first piston body 311 and the second piston body 312. The connecting portion 313 is opened with a mounting hole 3131 penetrating the piston 31. The first piston body 311 is provided with a plurality of first oil passing holes 3111 (i.e., large holes) uniformly penetrating through the first piston body 311 in the circumferential direction on the outer side of the connection portion 313. The second piston body 312 is provided with a second oil passing hole 3121 (i.e., a small hole) penetrating through the second piston body 312, and the second oil passing hole 3121 has a smaller diameter than the first oil passing hole 3111 and is communicated with the first oil passing hole 3111. The inner end surface of the second piston body 312 is connected to the connecting portion 313, the outer end surface is provided with a curved oil guide groove 3122, and the side surface of the outer ring connecting the inner end surface and the outer end surface is provided with a plurality of oil passing grooves 3123 recessed toward the center. The oil guide groove 3122 has a groove width equal to the aperture of the second oil passing hole 3121, one end of which is communicated with the second oil passing hole 3121, and the other end of which is communicated with one of the oil guide grooves 3122.

The seal ring 32 is disposed outside the connecting portion 313 and can move between the first piston body 311 and the second piston body 312. The sealing ring 32 is in interference fit with the housing 1, and a first gap 33 is reserved between the sealing ring and the connecting portion 313. When the piston 31 moves to the right, the packing 32 abuts against the first piston body 311, and when the piston 31 moves to the left, the packing 32 abuts against the second piston body 312, thereby sealing the oil gallery 3123 so that the oil cannot flow through the oil gallery 3123. Therefore, the connecting portion 313 may be provided with a boss 3132 to limit the position of the sealing ring 32, so as to ensure that all the oil passing grooves 3123 can be sealed at the same time.

The valve plate 5 is clamped between the elastic block 4 and the second piston body 31, one end of the elastic block 4 is fixedly connected with the valve plate 5, and the other end of the elastic block is abutted against the valve plate 5. The valve plate 5 can push the elastic block 4 to compress, so that a second gap 10 is formed between the valve plate 5 and the piston 31. The elastic block 4 can be made of spring, sponge and other materials.

One end of the push rod 6 protrudes out of the shell 1 and is connected with an external structure, and the other end of the push rod penetrates through the oil seal 2 to enter the oil cavity and is fixedly connected with the piston assembly 3. The push rod 6 is in a step shape, the first section 61, the second section 62 and the third section 63 are respectively arranged from outside to inside, the diameter of the push rod decreases gradually, and a positioning boss 64 is further arranged at one end in the oil cavity. The valve plate 5 and the elastic block 4 are sleeved on the second section 62 and abut against the first section 61, and the piston 31 is sleeved on the third section 63 and abuts against the second section 62.

Spacing piece can be made by multiple types of materials such as plastics, stainless steel, including first spacing piece 71 and the spacing piece 72 of second, first spacing piece 71 cover is established outside second section 62, elastic block 4 passes through first spacing piece 71 with first section 61 is contradicted. The second position-limiting piece 72 is sleeved outside the third section 63, and the piston 31 is abutted against the positioning boss 64 through the second position-limiting piece 72.

The reset member 8 may be a spring or the like, and is disposed in the oil chamber, and one end of the reset member abuts against the housing 1, and the other end abuts against the piston 31, so that the piston assembly 3 can move along the oil chamber.

Preferably, the outer side of the oil seal 2 is further provided with a guide block 9, and the guide block 9 is sleeved on the outer side of the push rod 6 and is fixedly connected with the housing 1 to limit the freedom of movement of the push rod 6.

The working process of the active pressure relief type linear buffer for the meal furnace is explained below.

When a guest opens the cover of the meal furnace, the push rod is in a state of no external force for applying pressure, and the reset piece pushes the piston to be close to the opening of the outer shell, so that the push rod is driven to move. In the process, the sealing ring moves relative to the piston and is abutted against the first piston body, the oil guide groove is in a conducting state, and the valve plate is abutted against the piston under the action of the elastic block and moves along with the push rod. At this in-process, piston right side space is compressed, and the hydraulic oil pressure increase of this region is in proper order through leading first clearance, the first oilhole fast flow direction piston left side between oil groove, sealing washer and the connecting portion to reach the effect that resets fast.

When the guest finishes taking the food but does not close the cover actively, the gravity of the meal furnace cover is applied to the push rod, so that the push rod is pushed to move reversely, and the piston is driven to move. In the process, the sealing ring moves relative to the piston and is abutted against the second piston body, so that the oil guide groove is in a closed state, and the valve plate is still abutted against the piston under the action of the elastic block and moves along with the push rod. In the process, the space on the left side of the piston is compressed, and the pressure of hydraulic oil in the area is increased and flows to the right side of the piston through the first oil passing hole, the first clearance between the sealing ring and the connecting part, the second oil passing hole and the oil guide groove in sequence. Because the passageway of leading the oil groove is narrow and longer, the velocity of flow of hydraulic oil receives very big restriction, and the flow is slow for the hydraulic oil that the left side space was gathered produces great resistance to the removal of piston and push rod, plays the cushioning effect, meal stove lid is with slow speed self-closing.

Referring to fig. 6, fig. 6 is a partial sectional view of the linear damper of the present invention when the guest actively closes the cover. When a guest finishes taking food and actively closes the cover, the push rod is pushed by the gravity far greater than that of the meal furnace cover, the pressure of hydraulic oil in the space on the left side of the piston is increased sharply, and when the pressure is increased to a certain degree, the valve plate can overcome the pressure of the elastic block to move, and a second gap is formed between the valve plate and the piston. At this moment, the left hydraulic oil of piston passes through first oilhole, the first clearance between sealing washer and the connecting portion in proper order, the second clearance between oilhole, valve block and the piston is crossed to the second to the piston right side is crossed to the fast flow direction of speed, thereby realizes the function of initiative pressure release, realizes the effect that the guest closed the meal stove lid fast, protects the inside part of linear buffer simultaneously, prolongs linear buffer's life.

It will be understood that in the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application. The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, i.e. a feature defined as "first", "second" may explicitly or implicitly include one or more of such features. Further, unless otherwise specified, "a plurality" means two or more.

It should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "hollow" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, such as the application of the above-mentioned linear buffer to toilet covers, trash can covers, etc., and the present invention is also intended to encompass these modifications and variations.

Claims

1. The utility model provides a section is used for initiative pressure release formula linear buffer of meal stove, is including the shell of seting up the oil pocket, the opening part seal of oil pocket is provided with the oil blanket, and the push rod passes the oil blanket is in with the setting piston assembly in the oil pocket is fixed, thereby will the oil pocket is separated for there being pole chamber and no pole chamber, be provided with in the no pole chamber with the piece that resets that piston assembly contradicts, its characterized in that:

still include valve block and elastic block, the valve block clamp is established between piston assembly and the elastic block and be located there is the pole chamber, the valve block lid is established piston assembly leads on the oil groove, the other end of elastic block with the push rod is fixed, works as when the push rod receives the thrust that surpasss the threshold value, fluid promotes the valve block overcomes the pressure of elastic block removes, realizes the pressure release.

2. An active pressure relief linear damper for a meal furnace according to claim 1, wherein: the active pressure relief type linear buffer further comprises a first limiting piece, one side of the first limiting piece is abutted against the elastic block, and the other side of the first limiting piece is fixed with the push rod.

3. An active pressure relief linear damper for a meal furnace according to claim 1 or 2, characterized in that: the active pressure relief type linear buffer further comprises a second limiting piece, and the piston assembly is fixed with the push rod through the second limiting piece.

4. An active pressure relief linear damper for a meal furnace according to claim 3, wherein: the active pressure relief type linear buffer further comprises a guide block, and the guide block is sleeved on the outer side of the push rod and fixedly connected with the shell.

5. An active pressure relief linear damper for a meal furnace according to claim 1, wherein: the reset piece is a spring, the spring is arranged in the rodless cavity in a compression mode, one end of the spring is abutted to the shell, and the other end of the spring is abutted to the piston assembly.