A joint structure of an air extraction hood

Abstract

This utility model provides a joint structure for a fume extractor, relating to the technical field of fume extractors. The joint structure includes a first connecting pipe, a second connecting pipe, a first connecting member, a second connecting member, and an adjusting assembly. The first connecting member has a first groove and a bearing groove; the second connecting member has a second groove and a positioning groove; the adjusting assembly includes a knob, a transmission rod, a bearing, and a fixing member; the positioning groove communicates with the second groove; the fixing member has a positioning post, the fixing member is disposed in the second groove, and the positioning post is installed in the positioning groove; the transmission rod passes through the bearing, one end of which is connected to the knob, and the other end is threadedly connected to the fixing member; the first connecting pipe is detachably connected to the first connecting member, and the second connecting pipe is detachably connected to the second connecting member. This fume extractor joint structure solves the technical problems of existing fume extractor joint mechanisms, where the knob is easily damaged during transportation and requires significant force to rotate.

Description

Technical Field

[0001] This utility model relates to the technical field of fume extraction hoods, and in particular to a joint structure for fume extraction hoods. Background Technology

[0002] A laboratory fume hood is a ventilation device used in laboratory environments. Its core function is to efficiently remove harmful gases, fumes, dust, and volatile substances generated during experiments or production processes, thereby protecting the health of operators, maintaining air quality, and ensuring experimental safety.

[0003] The existing fume extractor joint structure includes a first connecting tube, a second connecting tube, a knob, a threaded rod, and a nut. The nut is fixedly installed on the first connecting tube, the second connecting tube is connected to the first connecting tube, the knob is connected to the threaded rod, and the threaded rod passes through both the first and second connecting tubes, with one end of the threaded rod threadedly connected to the nut. In use, the connection strength between the first and second connecting tubes is adjusted by rotating the knob. However, in this type of fume extractor joint structure, the knob is exposed externally, making it susceptible to impacts during transportation. Furthermore, rotating the knob generates friction between the knob and the second connecting tube, making it difficult to adjust the connection strength between the first and second connecting tubes.

[0004] In the process of implementing this embodiment, the inventors discovered at least the following problems:

[0005] The existing fume extraction hood joint mechanism has knobs that are easily bumped during transportation, and turning the knobs requires a lot of force. Utility Model Content

[0006] The purpose of this utility model is to provide a joint structure for a vacuum hood, which solves the technical problems of existing vacuum hood joint mechanisms, such as the knob being easily bumped during transportation and the knob requiring a large force to turn.

[0007] Utility model solution:

[0008] This utility model provides a joint structure for an air extraction hood, including a first connecting pipe, a second connecting pipe, a first connecting member, a second connecting member, and an adjusting assembly; the first connecting member has a first groove and a bearing groove; the second connecting member has a second groove and a positioning groove; the adjusting assembly includes a knob, a transmission rod, a bearing, and a fixing member; the bearing groove communicates with the first groove, the knob is disposed in the first groove, the bearing is disposed in the bearing groove, one side of the bearing abuts against the first connecting member, and the other side of the bearing abuts against the knob; the positioning groove communicates with the second groove; the fixing member has a positioning post, the fixing member is disposed in the second groove, and the positioning post is installed in the positioning groove; the transmission rod passes through the bearing, one end of which is connected to the knob, and the other end of which is threadedly connected to the fixing member; the first connecting pipe is detachably connected to the first connecting member, and the second connecting pipe is detachably connected to the second connecting member.

[0009] Furthermore, the transmission rod is threadedly connected to a connecting sleeve, and the connecting sleeve has teeth on its outside; the connecting sleeve is fixedly connected to the fixing member.

[0010] Furthermore, a gasket is provided between the fixing member and the second connecting member.

[0011] Furthermore, a sealing ring is provided between the first connector and the second connector.

[0012] Furthermore, the sealing ring is provided with a first circular groove and a second circular groove, the first circular groove being connected to the first connecting member, and the second circular groove being connected to the second connecting member.

[0013] Beneficial effects:

[0014] This invention provides a joint structure for an air extraction hood. When it is necessary to adjust the connection strength between the first and second connecting parts, rotating the knob in the first groove causes the transmission rod to rotate. The transmission rod rotates within the fixing part, thereby making the fixing part squeeze the first and second connecting parts more tightly. The design of the first and second grooves ensures that neither the knob nor the fixing part is exposed to the outside, and the bearings make it easier for operators to turn the knob. Therefore, with this air extraction hood joint structure, the knob is not easily damaged during transportation, and the required rotational force for the knob is relatively small. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the joint structure of the air extraction hood provided in this embodiment;

[0017] Figure 2 This is a schematic diagram of the joint structure of the air extraction hood provided in this embodiment;

[0018] Figure 3 This is a schematic diagram of the joint structure of the air extraction hood provided in this embodiment;

[0019] Figure 4 This is a schematic diagram of the joint structure of the air extraction hood provided in this embodiment;

[0020] Figure 5 This is a schematic diagram of the joint structure of the air extraction hood provided in this embodiment;

[0021] Figure 6 This is a schematic diagram of the joint structure of the air extraction hood provided in this embodiment;

[0022] Figure 7 This is a schematic diagram of the joint structure of the air extraction hood provided in this embodiment.

[0023] icon:

[0024] 100 - First connecting pipe;

[0025] 200 - Second connecting pipe;

[0026] 300 - First connecting piece; 310 - First groove; 320 - Bearing groove;

[0027] 400 - Second connector; 410 - Second groove; 420 - Positioning groove; 430 - Gasket;

[0028] 500 - Adjustment component; 510 - Knob; 520 - Drive rod; 521 - Connecting sleeve; 522 - Tooth; 530 - Bearing; 540 - Fixing element; 550 - Positioning pin;

[0029] 600 - Sealing ring; 610 - First circular groove; 620 - Second circular groove. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that the components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to connections within two components.

[0035] Connectivity. Those skilled in the art will understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] This embodiment provides a vacuum hood joint structure; please refer to [reference needed]. Figure 1-7As shown, the assembly includes a first connecting pipe 100, a second connecting pipe 200, a first connecting member 300, a second connecting member 400, and an adjusting assembly 500. The first connecting member 300 has a first groove 310 and a bearing groove 320. The second connecting member 400 has a second groove 410 and a positioning groove 420. The adjusting assembly 500 includes a knob 510, a transmission rod 520, a bearing 530, and a fixing member 540. The bearing groove 320 communicates with the first groove 310, the knob 510 is disposed in the first groove 310, and the bearing 530 is disposed in the bearing groove 320. One side of it abuts against the first connecting member 300, and the other side abuts against the knob 510; the positioning groove 420 communicates with the second groove 410; the fixing member 540 is provided with a positioning post 550, the fixing member 540 is set in the second groove 410, and the positioning post 550 is installed in the positioning groove 420; the transmission rod 520 passes through the bearing 530, one end of which is connected to the knob 510, and the other end of which is threadedly connected to the fixing member 540; the first connecting pipe 100 is detachably connected to the first connecting member 300, and the second connecting pipe 200 is detachably connected to the second connecting member 400.

[0038] Specifically, the first connecting pipe 100 and the second connecting pipe 200 are made of PP (polypropylene). The first connector 300 and the second connector 400 cooperate to allow the positions of the first connecting pipe 100 and the second connecting pipe 200 to rotate relative to each other. The adjusting component 500 is used to adjust the connection strength of the first connector 300 and the second connector 400. The first groove 310 is used to install the knob 510 so that the knob 510 is not exposed to the outside. The bearing groove 320 is used to install the bearing 530, and the bearing 530 is used to reduce the friction between the knob 510 and the first connector 300 when rotating. The second groove 410 is used to install the fixing member 540. The positioning groove 420 and the positioning post 550 cooperate to prevent the fixing member 540 from rotating within the second groove 410. The fixing member 540 is threadedly connected to the transmission rod 520 so that the distance between the first connector 300 and the second connector 400 can be adjusted when the transmission rod 520 rotates. When it is necessary to adjust the connection strength of the first connector 300 and the second connector 400, the knob 510 in the first groove 310 is rotated. The knob 510 drives the transmission rod 520 to rotate, and the transmission rod 520 rotates within the fixing member 540, thereby making the fixing member 540 squeeze the first connector 300 and the second connector 400 more tightly. The arrangement of the first groove 310 and the second groove 410 ensures that neither the knob 510 nor the fixing member 540 is exposed to the outside, and the bearing 530 makes it easier for the operator to turn the knob 510.

[0039] In this embodiment, the transmission rod 520 is threadedly connected to a connecting sleeve 521, and the connecting sleeve 521 has teeth 522 on its outside; the connecting sleeve 521 is fixedly connected to the fixing member 540.

[0040] Specifically, the external teeth 522 of the connecting sleeve 521 make the connection between the connecting sleeve 521 and the fixing member 540 tighter and prevent relative rotation between the two.

[0041] In this embodiment, a gasket 430 is provided between the fixing member 540 and the second connecting member 400.

[0042] Specifically, the setting of the gasket 430 reduces the rigid connection area between the fastener 540 and the second connector 400, thereby reducing wear on both sides.

[0043] In this embodiment, a sealing ring 600 is provided between the first connector 300 and the second connector 400.

[0044] Specifically, the sealing ring 600 is used to enhance the airtightness of the connection between the first connector 300 and the second connector 400.

[0045] In this embodiment, the sealing ring 600 is provided with a first circular groove 610 and a second circular groove 620. The first circular groove 610 is connected to the first connector 300, and the second circular groove 620 is connected to the second connector 400.

[0046] Specifically, the first circular groove 610 and the second circular groove 620 facilitate the installation and positioning of the sealing ring 600, while also increasing the contact area between the sealing ring 600 and the first connector 300 and the second connector 400 respectively, thereby enhancing the airtightness of the connection between the first connector 300 and the second connector 400.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A joint structure of an extraction hood, characterized by comprising: It includes a first connecting pipe (100), a second connecting pipe (200), a first connector (300), a second connector (400), and an adjustment assembly (500); The first connector (300) is provided with a first groove (310) and a bearing groove (320); The second connector (400) is provided with a second groove (410) and a positioning groove (420); The adjustment assembly (500) includes a knob (510), a transmission rod (520), a bearing (530), and a fixing member (540); The bearing groove (320) communicates with the first groove (310), the knob (510) is disposed in the first groove (310), and the bearing (530) is disposed in the bearing groove (320), with one side abutting against the first connector (300) and the other side abutting against the knob (510); The positioning groove (420) is connected to the second groove (410); The fixing member (540) is provided with a positioning post (550), the fixing member (540) is disposed in the second groove (410), and the positioning post (550) is installed in the positioning groove (420); The transmission rod (520) passes through the bearing (530), one end of which is connected to the knob (510), and the other end of which is threadedly connected to the fixing member (540). The first connecting pipe (100) is detachably connected to the first connecting member (300), and the second connecting pipe (200) is detachably connected to the second connecting member (400).

2. A joint structure for a suction hood according to claim 1, characterised in that The transmission rod (520) is threadedly connected to a connecting sleeve (521), and the connecting sleeve (521) has teeth (522) on the outside; The connecting sleeve (521) is fixedly connected to the fixing member (540).

3. A joint structure for a suction hood according to claim 2, characterised in that A gasket (430) is provided between the fastener (540) and the second connector (400).

4. A joint structure for a suction hood according to claim 3, wherein A sealing ring (600) is provided between the first connector (300) and the second connector (400).

5. The air extraction hood joint structure according to claim 4, characterized in that, The sealing ring (600) is provided with a first circular groove (610) and a second circular groove (620). The first circular groove (610) is connected to the first connector (300), and the second circular groove (620) is connected to the second connector (400).

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