CN219932701U - Vacuum chuck - Google Patents

Abstract

The utility model discloses a vacuum chuck, comprising: the chassis assembly comprises a rubber sucker and a square pull rod, wherein the square pull rod is vertically arranged at the central position of the rubber sucker and sleeved with a spring, and the vacuum degree required by installation is formed between the rubber sucker and the sucker shell by driving the square pull rod to move upwards; the pulling buckle assembly comprises a pulling buckle shell, a warning unit and a connecting rod piece for supporting the warning unit; when the vacuum degree of the warning part of the warning unit in the sucker is reduced, the warning part is in a tilting and exposing state through the acting force of the pressure spring and the relative sliding of the arc-shaped sliding part of the warning unit and the pulling buckle shell. The utility model does not need to use the existing self-locking structure, can effectively early warn after the vacuum degree in the sucker space is reduced to a certain degree, and is particularly suitable for being applied to the armrest sucker.

Description

Vacuum chuck

Technical Field

The utility model relates to the field of devices which can be adsorbed on smooth surfaces by applying a vacuum negative pressure principle, in particular to a vacuum chuck.

Background

Suction devices employing the vacuum negative pressure principle have been widely used, including tool chucks and armrest chucks for bathroom and toilet applications, and the like. At present, the prior art adopts the vacuumizing principle, the contact part of the handrail and the wall is set as a sucker, and the handrail is directly adsorbed on the wall by sucking the air in the space formed by enclosing the sucker and the adsorption surface. When the armrest is used, air between the sucker and the adsorption surface needs to be exhausted, negative pressure is generated between the armrest and the outside atmosphere, so that the sucker is adsorbed on the adsorbed surface, the sucker needs to be always kept in a vacuum negative pressure state, and in order to keep the vacuumizing effect, the armrest generally needs to be pumped by using a pumping pump, and how to arrange a pump body, a power supply and the like in a smaller installation space of the rod-shaped armrest is difficult. In addition, in the case of a vacuum chuck which does not use facilities such as an air pump and the like in which the vacuum degree is not required, the air pressure in the space is generally reduced by increasing the space in the chuck, so that the purpose of absorbing the vacuum chuck is achieved in a negative pressure state, and the vacuum chuck is generally provided with a lever prying mechanism and a self-locking mechanism.

For example, chinese patent CN204416277U discloses a hand-held glass sucker (i.e. tool sucker), which comprises two sucker bodies, two sucker handles, two connecting brackets and a telescopic connecting rod device, wherein the two sucker bodies are respectively connected with two ends of the telescopic connecting rod device through two connecting brackets, the two connecting brackets are respectively welded on the two sucker bodies, and the two sucker handles are respectively welded at the centers of the two sucker bodies. The sucker can adjust the angle of the sucker and the length of the sucker connecting rod, so that the application range of the sucker can be expanded and flexibly adjusted, and glass with larger bending degree can be adsorbed; the sucker handle with the lifting lug can realize the carrying and the installation of curved glass for manual or hoisting equipment; the driving force for deforming the sucker rubber ring can be properly reduced by adopting the twisting device based on the lever principle. Meanwhile, the method can provide a stable and safe adsorption method and has the characteristics of small initial working pressure, wide application range, high reliability and the like. But this kind of scheme needs to use spring self-locking mechanism, needs to lock the connecting rod in a fixed position after forming vacuum negative pressure, and the operation is more loaded down with trivial details and laborious.

Therefore, there is a need for a vacuum chuck that does not require a self-locking structure and that can provide an early warning after the vacuum level in the chuck space is reduced to a certain level.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The utility model aims to provide a vacuum chuck which does not need to use a self-locking structure, can perform early warning after the vacuum degree in the chuck space is reduced to a certain degree, and is particularly suitable for being applied to an armrest chuck.

To achieve the above object, the present utility model provides a vacuum chuck comprising: the chassis assembly comprises a rubber sucker and a square pull rod, wherein the square pull rod is vertically arranged at the central position of the rubber sucker and sleeved with a spring, and the vacuum degree required by installation is formed between the rubber sucker and the sucker shell by driving the square pull rod to move upwards; the pulling buckle assembly comprises a pulling buckle shell, a warning unit and a connecting rod piece for supporting the warning unit; when the vacuum degree of the warning part of the warning unit in the sucker is reduced, the warning part is in a tilting and exposing state through the acting force of the pressure spring and the relative sliding of the arc-shaped sliding part of the warning unit and the pulling buckle shell.

Further, in the above technical scheme, the trigger shell may be provided with a pressing portion that provides an upward moving force for the square pull rod through a lever principle of the link plate.

Furthermore, in the above technical scheme, the pulling buckle shell can be further provided with a first accommodating part, the first accommodating part is used for providing an accommodating space for the warning part of the warning unit, and when the sucker is in a normal adsorption state, the warning part can completely sink into the accommodating space and be flush with the pulling buckle shell.

Further, in the above technical solution, the side surface of the warning portion may be a reddish area.

Furthermore, in the above technical solution, the number of the connecting rod pieces may be two, and the warning units are respectively supported on two sides; the bearing part of the connecting rod piece can be arc-shaped and arranged at the corresponding position of the arc-shaped sliding part.

In the technical scheme, a rotating shaft pin hole can be formed in the connecting rod piece and connected with the spanner shell pin through a rotating shaft pin in a penetrating way, the rotating shaft pin is used as a lever fulcrum, and the connecting rod piece is used as a lever arm for providing upward movement force of the square pull rod; the connecting rod piece is also provided with a connecting pin hole which is used for penetrating the connecting pin and connecting with the upper end pin of the square pull rod.

Further, in the above technical solution, protrusions may be provided at corresponding positions of the lower part of the trigger housing and the arc-shaped sliding part of the warning unit, and the protrusions and the arc-shaped sliding part form a pair of sliding pairs; the top of the pressure spring is arranged on the lower wall surface of the warning part of the warning unit and is abutted against the warning part.

Further, in the above-mentioned technical scheme, in sucking disc installation, through pressing the pressing part of pulling the knot casing, will press the power transmission and give the connecting rod piece and lift square pull rod, form the negative pressure at sucking disc inner space, atmospheric pressure pushes down square pull rod this moment, the arc sliding part of bearing portion upwards bearing warning unit of connecting rod piece other end makes arc sliding part follow protruding clockwise slip, warning unit's warning part overcomes the elasticity of pressure spring and subsides completely in pulling the first holding portion of knot casing, the sucking disc is in normal adsorption state this moment.

Further, in the above technical scheme, when the downward pressure of square pull rod reduces is caused to the gas leakage in sucking disc inner space, the upward bearing arc sliding part's of bearing portion power reduces, and arc sliding part slides anticlockwise along protruding this moment, and the elasticity of pressure spring jack-up warning portion, and the sucking disc is in abnormal adsorption state.

Further, in the above technical scheme, an armrest mounting portion for mounting the armrest may be provided on the chuck housing.

Compared with the prior art, the utility model has the following beneficial effects:

1) According to the vacuum chuck, through the design of the pulling buckle assembly, the connecting rod piece and the arc-shaped sliding part of the warning unit, which are designed by adopting the lever principle, are combined with the sliding pair formed by the bulge of the pulling buckle shell, so that the existing self-locking structure is not required, and the operation is more convenient on the premise of ensuring the safety;

2) According to the utility model, when air leakage occurs in the sucker space, the force balance of each component in the pulling and buckling assembly is broken, the warning part of the warning unit is tilted under the action of the elastic restoring force of the pressure spring, the red color coated on the side wall of the tilted warning part can better provide a warning effect, namely, effective early warning is carried out after the vacuum degree in the sucker space is reduced to a certain degree;

3) The utility model is particularly suitable for application in armrest suction cups, and can also be applied in tool suction cups.

The foregoing description is only an overview of the present utility model, and it is to be understood that it is intended to provide a more clear understanding of the technical means of the present utility model and to enable the technical means to be carried out in accordance with the contents of the specification, while at the same time providing a more complete understanding of the above and other objects, features and advantages of the present utility model, and one or more preferred embodiments thereof are set forth below, together with the detailed description given below, along with the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the external appearance structure of the vacuum chuck of the present utility model.

Fig. 2 is an exploded view of the vacuum chuck of the present utility model.

Figure 3 is an overall cross-sectional view of the vacuum chuck of the present utility model in a non-suction state.

Fig. 4 is an overall sectional view of the vacuum chuck of the present utility model in a normal suction state.

Fig. 5 is an overall cross-sectional view of the present utility model in an abnormal adsorption state such as blow-by gas.

The main reference numerals illustrate:

100-vacuum chuck (no armrest mounted);

the device comprises a 1-pulling and buckling component, a 11-pulling and buckling shell, a 110-bulge, a 111-pressing part, a 112-first accommodating part, a 12-connecting rod piece, a 121-rotating shaft pin hole, a 122-connecting pin hole, a 123-supporting part, a 13-warning unit, a 131-warning part, a 132-arc sliding part, a 2-sucker shell, a 21-second accommodating part, a 22-handrail mounting part, a 3-chassis component, a 31-rubber sucker, a 32-square pull rod, a 4-connecting pin, a 5-rotating shaft pin, a 6-pressure spring, a 7-gasket and an 8-spring.

Detailed Description

The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or other components.

Spatially relative terms, such as "below," "beneath," "lower," "above," "upper," and the like, may be used herein for ease of description to describe one element's or feature's relationship to another element's or feature's in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the article in use or operation in addition to the orientation depicted in the figures. For example, if the article in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" may encompass both a direction of below and a direction of above. The article may have other orientations (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terms "first," "second," and the like herein are used for distinguishing between two different elements or regions and are not intended to limit a particular position or relative relationship. In other words, in some embodiments, the terms "first," "second," etc. may also be interchanged with one another.

As shown in fig. 1 to 5, the present utility model provides a vacuum chuck 100 that can be used in a bathroom or toilet armrest, and also can be used in a tool chuck. The vacuum chuck comprises a spanner assembly 1, a chuck shell 2 and a chassis assembly 3. The sucker housing 2 may be of an integrally formed structure, and may accommodate the trigger assembly 1, and may be provided with a handrail mounting portion 22 for mounting a handrail (not shown). The chassis assembly 3 comprises a rubber sucker 31 and a square pull rod 32, the square pull rod 32 is vertically arranged at the center of the rubber sucker 31 and sleeved with a spring 8, and the vacuum degree required by installation can be formed between the rubber sucker 31 and the sucker shell 2 by driving the square pull rod to move upwards. The chassis assembly 3 of the utility model forms negative pressure by enlarging the volume of the hollow space in the sucker, so that the rubber sucker 31 is firmly adsorbed on a smooth surface (such as a smooth wall surface or glass of a bathroom, a bathroom and the like), and the square pull rod 32 moves upwards to enlarge the volume of the space in the sucker, thereby forming the required vacuum degree. The pulling buckle assembly 1 comprises a pulling buckle shell 11, a warning unit 13 and a connecting rod piece 12 for supporting the warning unit 13. When the vacuum degree of the space in the sucker is reduced (namely, when the sucker leaks), the warning part 131 of the warning unit 13 forms a tilting and exposing state of the warning part 131 through the elastic acting force of the pressure spring 6 and the relative sliding of the arc-shaped sliding part 132 of the warning unit 13 and the trigger shell 11. When the user observes the warning part 131 to tilt, the user can intuitively judge that the suction force of the vacuum chuck is insufficient and the vacuum chuck has a falling risk.

As further shown in fig. 2 to 4, the trigger housing 11 is provided with a pressing portion 111 and a first accommodating portion 112. Wherein, the pressing portion 111 provides the square tension rod 32 with an upward moving force by the lever principle of the link plate 12, that is, by pressing with a small force at the pressing portion 111, when the pressing force is transmitted to the left end (refer to fig. 4) of the link plate 12, the right end of the link plate 12 can provide a large upward pulling force to the square tension rod 32, thereby driving the square tension rod 32 to move upward. The first accommodating portion 112 (refer to fig. 2) is configured to provide an accommodating space for the warning portion 131 of the warning unit 13, and when the suction cup is in the normal suction state, the warning portion 131 is completely settled into the accommodating space and is flush with the trigger housing 11 (refer to the state of fig. 4). Preferably, but not by way of limitation, the sides of the warning portion 131 may be painted with a striking red paint, i.e. a red painted area is provided on the sides. When the vacuum chuck 100 of the present utility model is not sufficiently attracted due to air leakage during use, the large red side wall of the warning portion 131 is exposed by tilting, so that an effective warning can be provided to the user.

As further shown in fig. 2, the trigger assembly 1 of the present utility model is integrally disposed in the second accommodating portion 21 on the suction cup housing 2 after being installed, wherein the trigger housing 11, the link plate 12 and the warning unit 13 are assembled in a linkage state. Specifically, the number of the connecting rod pieces 12 is two, the two sides support the warning units 13 respectively, one end of the connecting rod piece 12 is provided with a supporting portion 123, and the supporting portion 123 is arc-shaped and is arranged at a corresponding position of an arc-shaped sliding portion 132 of the warning unit 13. Further as shown in fig. 2, the connecting rod piece 12 is provided with a pivot pin hole 121, the pivot pin 5 is inserted into the pivot pin hole 121 to be in pin connection with the trigger shell 11, after connection, the pivot pin 5 can be used as a lever fulcrum, the connecting rod piece 12 is used as a lever arm (the lever fulcrum is a long arm to one side of the bearing part 123, the other side is a short arm), the end part of the short arm of the connecting rod piece 12 is provided with a connecting pin hole 122 for inserting the connecting pin 4 and being in pin connection with the upper end part of the square pull rod, so that a small force is applied to one end of the long arm of the connecting rod piece 12 to provide a large upward moving force for the square pull rod 32 (refer to fig. 4).

As further shown in fig. 3 to 5, a protrusion 110 is provided at a corresponding position of the arc-shaped sliding portion 132 of the warning unit 13 at the lower portion of the trigger housing 11, and during the interlocking process, the protrusion 110 and the arc-shaped sliding portion 132 form a pair of sliding pairs. The top end of the pressure spring 6 is arranged on the lower wall surface of the warning part 131 of the warning unit 13 and is abutted against the warning part 131. When the warning portion 131 is rotated downward against the elastic force of the compression spring 6, the arc-shaped sliding portion 132 slides on the protrusion 110 in the clockwise direction indicated by the broken line arrow in fig. 4 until the warning portion 131 is completely settled into the first accommodating portion 112 on the trigger housing 11; when the warning portion 131 is rotated to move upward by the elastic restoring force of the compression spring 6, the arc-shaped sliding portion 132 slides on the protrusion 110 in the counterclockwise direction indicated by the dotted arrow in fig. 5 such that the warning portion 131 is tilted from the first receiving portion 112 and exposed.

The operation principle and operation process of the pulling buckle assembly in the vacuum chuck 100 of the present utility model will be described in detail as follows:

first, prior to the suction cup installation, the trigger assembly 1 as a whole is shown in FIG. 3, with the trigger housing 11 facing upward, the square tie rod 32 at the lowermost end and the spring 8 in a relaxed state.

Next, referring to fig. 4, in the suction cup mounting process, the rubber suction cup 31 is tightly attached to the suction surface, the pressing force is transferred to the connecting rod piece 12 by pressing the pressing portion 111 of the trigger housing 11, the square pull rod 32 at the other end of the lever is lifted up by the lever principle, negative pressure is formed in the suction cup inner space (i.e., the closed space formed by enclosing the suction cup housing 2 and the rubber suction cup 31), at this time, the square pull rod 32 is pressed down by the atmospheric pressure, the supporting portion 123 (refer to fig. 2) at the other end of the connecting rod piece 12 supports the arc-shaped sliding portion 132 of the warning unit 13 upwards, so that the arc-shaped sliding portion 132 slides clockwise along the protrusion 110 (in the direction of the dotted arrow in fig. 4), when the pressing portion 111 is pressed in place, the warning portion 131 of the warning unit 13 is completely settled in the first accommodating portion 112 of the trigger housing 11 against the elastic force of the pressure spring, at this time, the three components of the trigger assembly 1 are stressed equally and are in a stable state, and the suction cup is firmly adsorbed on the suction surface, i.e., in a normal adsorption state and can be safely used.

Again, when the slight leakage phenomenon occurs in the space in the suction cup, and the downward pressure applied to the square pull rod 32 is reduced, the corresponding force of the supporting portion 123 of the link plate 12 for supporting the arc sliding portion 132 upwards is reduced, at this time, the arc sliding portion 132 slides anticlockwise along the protrusion 110 (in the direction of the dashed arrow in fig. 5), and the elastic force of the pressure spring 6 lifts up the warning portion 131, so as to warn the user that the suction cup is in an abnormal adsorption state and has a falling risk.

According to the vacuum chuck, through the design of the pulling buckle assembly, the connecting rod piece and the arc-shaped sliding part of the warning unit, which are designed by adopting the lever principle, are combined with the sliding pair formed by the bulge of the pulling buckle shell, so that the existing self-locking structure is not required, and the operation is more convenient on the premise of ensuring the safety; when air leakage occurs in the sucker space, the balance of the force of each component in the pulling and buckling assembly is broken, the warning part of the warning unit is tilted under the action of the elastic restoring force of the pressure spring, the red color coated on the side wall of the tilted warning part can better provide warning effect, namely, effective early warning is carried out after the vacuum degree in the sucker space is reduced to a certain degree; the utility model is particularly suitable for application in armrest suction cups, and can also be applied in tool suction cups.

The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. Any simple modifications, equivalent variations and modifications of the above-described exemplary embodiments should fall within the scope of the present utility model.

Claims (10)

1. A vacuum chuck, comprising:

the chassis assembly comprises a rubber sucker and a square pull rod, wherein the square pull rod is vertically arranged at the central position of the rubber sucker and sleeved with a spring, and the vacuum degree required by installation is formed between the rubber sucker and the sucker shell by driving the square pull rod to move upwards;

the pulling buckle assembly comprises a pulling buckle shell, a warning unit and a connecting rod piece for supporting the warning unit; when the vacuum degree is reduced, the warning part of the warning unit is in a tilting and exposing state through acting force of the pressure spring and relative sliding of the arc-shaped sliding part of the warning unit and the pulling buckle shell.

2. The vacuum chuck as in claim 1, wherein the trigger housing is provided with a pressing portion that provides an upward moving force to the square tie rod by a lever principle of the link plate.

3. The vacuum chuck according to claim 1, wherein the trigger housing is further provided with a first accommodating portion for providing an accommodating space for the warning portion of the warning unit, and the warning portion is completely settled into the accommodating space and is flush with the trigger housing when the chuck is in a normal adsorption state.

4. A vacuum chuck according to claim 3 wherein the warning portion is flanked by red areas.

5. The vacuum chuck according to claim 1, wherein the number of the connecting rod pieces is two, and the warning units are respectively supported on two sides; the bearing part of the connecting rod piece is arc-shaped and is arranged at the corresponding position of the arc-shaped sliding part.

6. The vacuum chuck according to claim 5, wherein the connecting rod piece is provided with a rotating shaft pin hole, and is connected with the spanner shell pin through a rotating shaft pin, the rotating shaft pin is used as a lever fulcrum, and the connecting rod piece is used as a lever arm for providing the upward moving force of the square pull rod; the connecting rod piece is also provided with a connecting pin hole which is used for penetrating the connecting pin and connecting with the upper end pin of the square pull rod.

7. The vacuum chuck according to claim 6, wherein protrusions are provided at corresponding positions of the arc-shaped sliding parts of the warning unit and the lower part of the trigger housing, and the protrusions and the arc-shaped sliding parts form a pair of sliding pairs; the top end of the pressure spring is arranged on the lower wall surface of the warning part of the warning unit and is abutted to the warning part.

8. The vacuum chuck according to claim 7, wherein in the chuck mounting process, the pressing force is transmitted to the link plate and the square pull rod is lifted up by pressing the pressing part of the buckle housing, the space in the chuck forms a negative pressure, at this time, the atmospheric pressure presses down the square pull rod, the bearing part at the other end of the link plate upwardly bears the arc sliding part of the warning unit, the arc sliding part slides clockwise along the protrusion, the warning part of the warning unit completely settles in the first accommodating part of the buckle housing against the elastic force of the pressure spring, and at this time, the chuck is in a normal adsorption state.

9. The vacuum chuck according to claim 8, wherein when the downward pressure applied to the square tension rod is reduced due to air leakage in the inner space of the chuck, the force of the supporting portion for supporting the arc-shaped sliding portion upwards is reduced, the arc-shaped sliding portion slides anticlockwise along the protrusion, the warning portion is jacked up by the elastic force of the compression spring, and the chuck is in an abnormal adsorption state.

10. The vacuum chuck of claim 1, wherein the chuck housing is provided with a handrail mounting portion for mounting a handrail.