Jacking mechanism

Abstract

The utility model relates to a jacking mechanism, which is applied to vacuum drying equipment and comprises a jacking rod, a jacking rod, a lifting mechanism and a lifting mechanism, one end of the jacking rod is arranged in a vacuum cavity of the vacuum drying equipment in a penetrating manner, and a through hole for the jacking rod to penetrate through is formed in the vacuum cavity; the other end of the ejector rod is arranged on the ejector rod seat, and the ejector rod seat supports the ejector rod; the ejector rod is sleeved with the sealing assembly, the length of the sealing assembly can be changed along with stretching and retracting of the ejector rod, the two ends of the sealing assembly are connected with the vacuum cavity and the ejector rod base in a sealed mode respectively, and the sealing assembly is matched with the vacuum cavity and the ejector rod base to jointly seal the through hole. According to the jacking mechanism, the sealing assembly capable of changing the length along with the movement of the ejector rod is arranged outside the ejector rod, and the gap between the ejector rod and the through hole is always sealed through the sealing assembly, so that the ejector rod is in sealed connection with the vacuum cavity, and it is ensured that the sealing performance in the vacuum cavity is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum drying equipment, in particular to a lifting mechanism. Background Art

[0002] VCD (Vacuum Concentration Drying), that is, vacuum drying equipment, has a vacuum cavity that can provide a negative pressure environment. The air pressure in the vacuum cavity is reduced by evacuating the air. In recent years, vacuum drying equipment has been used in many fields to dry and solidify products.

[0003] In order to support the product in the vacuum chamber and drive the product to move up and down, in the prior art, a lifting mechanism is generally used in conjunction with the vacuum chamber, that is, a push rod is set to pass through the vacuum chamber, and a push rod driving source is set to be connected to the push rod, the push rod is used to support the product, and the push rod driving source is used to drive the product to move up and down.

[0004] During the specific implementation, in order to allow the push rod to pass through the vacuum chamber, it is necessary to open a through hole on the vacuum chamber for the push rod to pass through. In order to facilitate the movement of the push rod relative to the vacuum chamber, it is necessary to reserve a certain gap between the push rod and the vacuum chamber, that is, to set a gap fit between the push rod and the vacuum chamber. Although the gap between the push rod and the vacuum chamber can be controlled within a very small range through process control, as long as there is a gap, even if it is very small, it will affect the sealing of the vacuum chamber. Utility Model Content

[0005] To this end, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the push rod passes through the vacuum chamber and affects the sealing inside the vacuum chamber. A lifting mechanism is provided, and a sealing component is arranged outside the push rod, which can change the length as the push rod moves. The gap between the push rod and the through hole is always closed by the sealing component, so that the push rod is sealed and connected to the vacuum chamber, ensuring that the sealing inside the vacuum chamber is not affected.

[0006] In order to solve the above technical problems, the utility model provides a lifting mechanism, which is applied in vacuum drying equipment, including:

[0007] A push rod, one end of which is inserted into the vacuum cavity of the vacuum drying device, and a through hole for the push rod to pass through is opened in the vacuum cavity;

[0008] A push rod seat, on which the other end of the push rod is arranged, and the push rod seat supports the push rod;

[0009] A sealing component is sleeved outside the ejector rod. The sealing component can change its length as the ejector rod is extended or retracted. Both ends of the sealing component are respectively sealed and connected to the vacuum chamber and the ejector rod seat. The sealing component cooperates with the vacuum chamber and the ejector rod seat to seal the through hole.

[0010] In one embodiment of the present invention, the sealing assembly comprises:

[0011] A compression bellows, sleeved outside the top rod;

[0012] A sealing member is arranged at the end of the compression bellows, and the two ends of the compression bellows are respectively sealed and connected to the vacuum chamber and the ejector seat through the sealing member.

[0013] In one embodiment of the utility model, the sealing member is a sealing flange, which is integrally formed with the compression bellows, and can be connected to the vacuum chamber and the push rod seat respectively, and a sealing ring is arranged on the connecting end face of the sealing flange.

[0014] In one embodiment of the utility model, the sealing member is a KF sealing ring, both ends of the compression bellows are connected to the KF sealing ring, and the two KF sealing rings are respectively fixed to the vacuum chamber and the ejector seat through sealing pressure plates.

[0015] In one embodiment of the present invention, the KF sealing ring has two connecting parts, and a sealing body is arranged between the two connecting parts.

[0016] In one embodiment of the utility model, it also includes a lifting plate, on which a plurality of lift rod seats are arranged, each of which is provided with a lift rod, and the ends of the plurality of lift rods are inserted into the vacuum cavity of the vacuum drying equipment, and a sealing assembly is arranged outside each of the lift rods.

[0017] In one embodiment of the utility model, it also includes a push rod assembly connected to the lifting plate, and the lifting assembly drives the push rod plate to move up and down.

[0018] In one embodiment of the present invention, the push rod assembly comprises:

[0019] Mounting plate;

[0020] A lifting drive source is arranged on the mounting plate;

[0021] A connector is arranged at the output end of the lifting drive source, and the connector is connected to the lifting plate.

[0022] In one embodiment of the present invention, a guide assembly is further included, which is arranged between the vacuum chamber and the ejector seat, and the guide assembly limits the moving direction of the ejector.

[0023] In one embodiment of the present invention, the guide assembly comprises:

[0024] A guide rod, one end of which is fixed on the vacuum chamber;

[0025] A guide bearing is arranged on the lifting plate, the guide bearing is sleeved outside the guide rod, and the guide bearing slides on the guide rod along the extension direction of the guide rod.

[0026] The above technical solution of the utility model has the following advantages compared with the prior art:

[0027] The lifting mechanism described in the utility model adopts a sealing component that is sleeved on the outside of the ejector rod, and the two ends of the sealing component are respectively sealed and connected to the vacuum chamber and the ejector rod seat, so that a closed chamber structure is jointly formed by the sealing component, the vacuum chamber and the ejector rod seat, which can achieve the closure of the through hole; and the sealing component is arranged to change its length as the ejector rod moves. During the movement of the ejector rod, the sealing component can also always close the gap between the ejector rod and the through hole during the movement, so that the ejector rod is sealed and connected to the vacuum chamber, ensuring that the sealing inside the vacuum chamber is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0029] Figure 1 It is a partial structural schematic diagram of the jacking mechanism of the utility model;

[0030] Figure 2 It is a structural schematic diagram of an embodiment of the sealing assembly of the utility model;

[0031] Figure 3 It is a structural schematic diagram of another embodiment of the sealing assembly of the utility model;

[0032] Figure 4 It is a schematic diagram of the overall structure of the jacking mechanism of the utility model;

[0033] Explanation of the reference numerals in the specification: 1. ejector rod; 2. ejector rod seat; 3. sealing assembly; 31. compression bellows; 32. sealing flange; 33. sealing ring; 34. KF sealing ring; 35. sealing pressure plate; 4. lifting plate; 51. mounting plate; 52. lifting drive source; 53. joint; 61. guide rod; 62. guide bearing. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0035] In the existing vacuum drying equipment, in order to drive the product in the vacuum cavity to move up and down, it is necessary to set a push rod to pass through the vacuum cavity. For example, the Japanese patent with publication number: JP2006261379A, invention name: reduced pressure dryer, vacuum pump and reduced pressure drying method discloses such a vacuum drying equipment with a push rod inserted into the vacuum cavity. During the specific implementation, in order to enable the push rod to pass through the vacuum cavity, it is necessary to open a through hole for the push rod to pass through on the vacuum cavity. In order to facilitate the movement of the push rod relative to the vacuum cavity, a certain gap needs to be reserved between the push rod and the vacuum cavity, that is, a gap fit is set between the push rod and the vacuum cavity. Although the gap between the push rod and the vacuum cavity can be controlled within a very small range through process control, as long as there is a gap, even if it is very small, it will affect the sealing of the vacuum cavity.

[0036] In actual engineering, in order to solve this problem, the technical solution usually adopted is: a sealing ring in contact with the ejector pin is provided on the inner wall of the through hole, and when the ejector pin is stationary, the sealing ring can effectively close the gap to ensure the sealing inside the vacuum chamber; however, when the ejector pin moves relative to the vacuum chamber, the ejector pin will drive the sealing ring to swing and move relative to the sealing ring. In this process, the sealing contact between the sealing ring and the ejector pin will be affected, thereby affecting the sealing inside the vacuum chamber. In addition, the moving ejector pin is in frictional contact with the sealing ring, which can easily cause wear of the sealing ring after long-term use, affecting the sealing performance of the sealing ring.

[0037] Reference Figure 1As shown, in order to solve the above problems, the utility model discloses a lifting mechanism, which is used in vacuum drying equipment, including: a push rod 1, a push rod seat 2 and a sealing assembly 3, wherein: one end of the push rod 1 is inserted into the vacuum cavity of the vacuum drying equipment, and the other end of the push rod 1 is arranged on the push rod seat 2, and the push rod 1 is supported by the push rod seat 2 to extend in the direction of the vacuum cavity, and a through hole for the push rod 1 to pass through is opened on the vacuum cavity, and the push rod 1 passes through the through hole into the vacuum cavity, which can support the product in the vacuum cavity, and moving the push rod seat 2 can drive the product to move up and down through the push rod 1, and the sealing assembly 3 is sleeved on the Outside the push rod 1, the two ends of the sealing component 3 are respectively sealed and connected with the vacuum chamber and the push rod seat 2, that is, the sealing component 3, the vacuum chamber and the push rod seat 2 together form a closed chamber structure, and the closed chamber structure can block the through hole from being connected to the outside, thereby realizing the closure of the through hole, and the sealing component 3 has a telescopic function. When the push rod 1 moves, the sealing component 3 can change its length with the push rod 1 to ensure that the two ends of the sealing component 3 can always be sealed and connected with the vacuum chamber and the push rod seat 2, and the gap between the push rod 1 and the through hole can also be closed during the movement, so that the push rod 1 is sealed and connected with the vacuum chamber, ensuring that the sealing inside the vacuum chamber is not affected.

[0038] In this embodiment, the sealing assembly 3 includes: a compression bellows 31 and a sealing member, wherein: the compression bellows 31 is sleeved outside the ejector pin 1, the compression bellows 31 has a telescopic function, and can change its length with the lifting and lowering movement of the ejector pin 1, so as to ensure that it can always be sleeved outside the ejector pin 1, and the sealing member is arranged at both ends of the compression bellows 31, and the two ends of the compression bellows 31 are respectively sealed and connected to the vacuum chamber and the ejector pin seat 2 through the sealing member;

[0039] In other embodiments, the compression bellows 31 can be replaced with other telescopic parts, such as telescopic sleeves, according to the actual use environment. As long as the length can be changed with the lifting and lowering movement of the push rod 1, they will not be described in detail here.

[0040] Specifically, during actual assembly, different forms of sealing members may be used according to different sealing requirements.

[0041] Reference Figure 2 As shown, in one embodiment, the sealing member can be set as a sealing flange 32, and the sealing flange 32 and the compression bellows 31 are integrally formed, and the end of the compression bellows 31 is stamped to form a flange structure, and the sealing flange 32 can be connected to the vacuum chamber and the push rod seat 2 respectively. In order to ensure the sealing of the connection, a sealing ring 33 is provided on the connecting end face of the sealing flange 32.

[0042] Reference Figure 3 As shown, in another embodiment, the sealing member can also be set as a KF sealing ring 34, and the KF sealing ring 34 is a rubber ring for sealing a vacuum flange for small-diameter pipelines. The KF sealing ring 34 has two connecting parts, and a sealing body is arranged between the two connecting parts, wherein: one connecting part of the KF sealing ring 34 can be embedded in the compression bellows 31, and the other connecting part of the KF sealing ring 34 can be embedded in the vacuum chamber or the push rod seat 2, both ends of the compression bellows 31 are connected to the KF sealing ring 34, and the two KF sealing rings 34 are respectively fixed to the vacuum chamber and the push rod seat 2 through sealing pressure plates.

[0043] Reference Figure 4 As shown, when the lifting mechanism is actually used to drive the product in the vacuum chamber to move, it is difficult to stably support the product with only one push rod 1. Therefore, in this embodiment, a lifting plate 4 is also provided, and a plurality of push rod seats 2 are provided on the lifting plate 4, and each of the push rod seats 2 is provided with a push rod 1. The ends of the plurality of push rods 1 are all inserted into the vacuum chamber of the vacuum drying equipment, and the product is supported by the plurality of push rods 1. In actual use, the height of each push rod 1 can be set according to the shape of the product, that is, the plurality of push rods 1 can form a support surface of the same height, and can jointly support a planar product, or the plurality of push rods 1 can form support surfaces of different heights, and can jointly support a product with steps. The plurality of push rod seats 22 are provided on the same lifting plate 4, so that the synchronous movement of the plurality of push rods 1 can be realized, and in order to ensure the sealing between each push rod 1 and the vacuum chamber, a sealing assembly 3 is provided outside each push rod 1.

[0044] Reference Figure 4 As shown, in this embodiment, a push rod assembly connected to the jacking plate 4 is also provided, and the jacking assembly can automatically drive the jacking plate to move up and down according to demand; specifically, the push rod assembly includes: a mounting plate 51, a jacking drive source 52 and a joint 53, the jacking drive source 52 is a cylinder drive source, the cylinder seat of the jacking drive source 52 is fixed on the mounting plate 51, and the output end of the jacking drive source 52 and the jacking plate 4 are connected through the joint 53 to realize the transmission of power;

[0045] In other embodiments, other forms of lifting components may also be used, such as a linear motor module, a lead screw lifting module, etc., as long as they can drive the lifting plate 4 to move up and down.

[0046] Reference Figure 4As shown, in the present embodiment, in order to ensure the stability of the lifting plate 4 during lifting and lowering, a guide assembly is further provided, wherein the guide assembly is provided between the vacuum chamber and the ejector rod seat 22, and the guide assembly can prevent the lifting plate 4 from tilting during lifting and lowering, thereby limiting the moving direction of the ejector rod 1; specifically, the guide assembly comprises: a guide rod 61 and a guide bearing 62, wherein one end of the guide rod 61 is fixed to the vacuum chamber, and the other end is fixed to the mounting plate 51, and the guide bearing 62 is provided on the lifting plate 4, and the guide bearing 62 is sleeved outside the guide rod 61, so that the guide bearing 62 slides on the guide rod 61 along the extension direction of the guide rod 61, and the only sliding direction of the lifting plate 4 is determined by the limiting cooperation of the guide rod 61 and the guide bearing 62, thereby preventing the lifting plate 4 from tilting, thereby improving the lifting stability of the ejector rod 1.

[0047] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A lifting mechanism, characterized in that: Applications in vacuum drying equipment include: A push rod, one end of which is inserted into the vacuum cavity of the vacuum drying device, and a through hole for the push rod to pass through is opened in the vacuum cavity; A push rod seat, on which the other end of the push rod is arranged, and the push rod seat supports the push rod; A sealing component is sleeved outside the ejector rod. The sealing component can change its length as the ejector rod is extended or retracted. Both ends of the sealing component are respectively sealed and connected to the vacuum chamber and the ejector rod seat. The sealing component cooperates with the vacuum chamber and the ejector rod seat to seal the through hole.

2. The lifting mechanism according to claim 1, characterized in that: The sealing assembly comprises: A compression bellows, sleeved outside the top rod; A sealing member is arranged at the end of the compression bellows, and the two ends of the compression bellows are respectively sealed and connected to the vacuum chamber and the ejector seat through the sealing member.

3. The lifting mechanism according to claim 2, characterized in that: The sealing member is a sealing flange, which is integrally formed with the compression bellows. The sealing flange can be connected to the vacuum chamber and the ejector seat respectively, and a sealing ring is arranged on the connecting end surface of the sealing flange.

4. The lifting mechanism according to claim 2, characterized in that: The sealing member is a KF sealing ring, both ends of the compression bellows are connected to the KF sealing ring, and the two KF sealing rings are respectively fixed on the vacuum chamber and the ejector seat through a sealing pressure plate.

5. The lifting mechanism according to claim 4, characterized in that: The KF sealing ring has two connecting parts, and a sealing body is arranged between the two connecting parts.

6. The lifting mechanism according to claim 1, characterized in that: It also includes a lifting plate, on which a plurality of lift rod seats are arranged, each of which is provided with a lift rod, and ends of the plurality of lift rods are inserted into the vacuum cavity of the vacuum drying equipment, and a sealing assembly is arranged outside each of the lift rods.

7. The lifting mechanism according to claim 6, characterized in that: It also includes a push rod assembly connected to the lifting plate, and the push rod assembly drives the push rod plate to move up and down.

8. The lifting mechanism according to claim 7, characterized in that: The ejector assembly comprises: Mounting plate; A lifting drive source is arranged on the mounting plate; A connector is arranged at the output end of the lifting drive source, and the connector is connected to the lifting plate.

9. The lifting mechanism according to claim 6, characterized in that: It also includes a guide assembly, which is arranged between the vacuum chamber and the ejector seat, and the guide assembly limits the moving direction of the ejector.

10. The lifting mechanism according to claim 9, characterized in that: The guide assembly comprises: A guide rod, one end of which is fixed on the vacuum chamber; A guide bearing is arranged on the lifting plate, the guide bearing is sleeved outside the guide rod, and the guide bearing slides on the guide rod along the extension direction of the guide rod.

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