Supporting shaft connecting structure of negative pressure fan

Abstract

The utility model discloses a fulcrum shaft connecting structure of a negative pressure fan, which is characterized in that a right-angle-shaped connecting component is arranged at the connecting position of a fulcrum shaft and a frame body; the two ends of the connecting component are attached to the outer wall of the end of the supporting shaft and the inner wall of the frame body respectively and then can be sequentially connected with one end of the connecting component and the inner side of the frame body in a screwed mode through a first screw rod so that the connecting component and the frame body can be locked. And a second screw rod is sequentially screwed with the other end of the connecting component and the end part of the supporting shaft so as to lock the connecting component and the supporting shaft, so that the supporting shaft and the frame body are locked. Compared with the prior art, the locking tightness between the fulcrum shaft and the frame body is effectively improved through the connecting component, meanwhile, abnormal sound caused by looseness of the fulcrum shaft and the frame body is effectively avoided in the mode that the two ends of the connecting component are attached to the fulcrum shaft and the frame body respectively and then locked, and the overall structure is simple and convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of negative pressure fans, in particular to a support shaft connection structure of a negative pressure fan. Background Art

[0002] Negative pressure fans use air convection and negative pressure ventilation to cool down and quickly force the hot and humid air in the room to be discharged outdoors. Existing negative pressure fans mainly include a frame, a main shaft installed on the frame, fan blades pivotably installed on the main shaft, and a driving mechanism. In order to facilitate the installation of the fan blades, the main shaft cannot be directly welded or integrally formed on the frame of the negative pressure fan. Instead, a detachable connection structure is used to lock the end of the main shaft with the frame by screws to fix the main shaft. After long-term use, the connection is prone to loosening, causing the negative pressure fan to make abnormal noises when the fan blades rotate. Utility Model Content

[0003] The main purpose of the utility model is to provide a support shaft connection structure of a negative pressure fan, aiming to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model proposes a support shaft connection structure of a negative pressure fan, including a negative pressure fan body, the negative pressure fan body including a frame, a support shaft vertically arranged on the frame, and a right-angled connecting member, the two ends of the connecting member are respectively in contact with the inner wall of the frame and the outer wall of the end of the support shaft, and a first screw and a second screw are also provided, the rod portion of the first screw is sequentially screwed to one end of the connecting member and the inner side of the frame to lock the connecting member with the frame, the rod portion of the second screw is sequentially screwed to the other end of the connecting member and the end of the support shaft to lock the connecting member with the support shaft, thereby locking the support shaft with the frame.

[0005] The technical solution of the utility model sets a right-angled connecting member at the connection position of the support shaft and the frame body, and after the two ends of the connecting member are respectively fitted with the end outer wall of the support shaft and the inner wall of the frame body, the first screw rod can be sequentially screwed with one end of the connecting member and the inner side of the frame body to lock the connecting member and the frame body, and the second screw rod can be sequentially screwed with the other end of the connecting member and the end of the support shaft to lock the connecting member and the support shaft, thereby locking the support shaft and the frame body. Compared with the traditional one, the utility model effectively improves the locking tightness between the support shaft and the frame body through the connecting member, and at the same time, the two ends of the connecting member are respectively fitted with the support shaft and the frame body and then locked to effectively avoid the loosening of the support shaft and the frame body to cause abnormal noise. The overall structure is simple and easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the coordination of the frame, the support shaft and the connecting components;

[0007] Figure 2 It is a three-dimensional diagram of the support shaft and connecting components. DETAILED DESCRIPTION

[0008] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0009] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0010] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0011] The utility model provides a support shaft connection structure of a negative pressure fan.

[0012] In the embodiment of the utility model, Figures 1 to 2 As shown, the support shaft connection structure of the negative pressure fan includes a negative pressure fan body, which includes a frame 1, a support shaft 2 vertically arranged on the frame 1 and a right-angled connecting member 3, the two ends of the connecting member 3 are respectively in contact with the inner wall of the frame 1 and the outer wall of the end of the support shaft 2, and a first screw and a second screw are also provided. The rod portion of the first screw is sequentially screwed to one end of the connecting member 3 and the inner side of the frame 1 to lock the connecting member 3 with the frame 1, and the rod portion of the second screw is sequentially screwed to the other end of the connecting member 3 and the end of the support shaft 2 to lock the connecting member 3 with the support shaft 2, thereby locking the support shaft 2 with the frame 1.

[0013] The technical solution of the utility model sets a right-angled connecting member at the connection position of the support shaft and the frame body, and after the two ends of the connecting member are respectively fitted with the end outer wall of the support shaft and the inner wall of the frame body, the first screw rod can be sequentially screwed with one end of the connecting member and the inner side of the frame body to lock the connecting member and the frame body, and the second screw rod can be sequentially screwed with the other end of the connecting member and the end of the support shaft to lock the connecting member and the support shaft, thereby locking the support shaft and the frame body. Compared with the traditional one, the utility model effectively improves the locking tightness between the support shaft and the frame body through the connecting member, and at the same time, the two ends of the connecting member are respectively fitted with the support shaft and the frame body and then locked to effectively avoid the loosening of the support shaft and the frame body to cause abnormal noise. The overall structure is simple and easy to install and disassemble.

[0014] Specifically, the two ends of the connecting member 3 are respectively provided with a first screw hole 31 and a second screw hole 32, and the inner wall of the frame 1 and the outer wall of the end of the support shaft 2 are respectively provided with a third screw hole 11 and a fourth screw hole 21. After the two ends of the connecting member 3 are respectively attached to the inner wall of the frame 1 and the outer wall of the end of the support shaft 2, the first screw hole 31 is aligned with the third screw hole 11 for the first screw to be screwed, and the second screw hole 32 is aligned with the fourth screw hole 21 for the second screw to be screwed.

[0015] Specifically, the connecting member 3 is L-shaped, with a shorter end of the connecting member 3 being in contact with the outer wall of the support shaft 2 , and a longer end of the connecting member 3 being in contact with the inner wall of the frame 1 .

[0016] Specifically, the outer wall of the support shaft 2 is provided with a first recess 22 suitable for the shorter end of the connecting member 3, for the shorter end of the connecting member 3 to be inserted into; the inner wall of the frame body 1 is provided with a second recess 12 suitable for the longer end of the connecting member 3, for the longer end of the connecting member 3 to be inserted into.

[0017] Specifically, reinforcement strips 33 extending from one end of the connecting member 3 to the other end are formed on both sides of the connecting member 3 .

[0018] Specifically, the reinforcing strip 33 is in a sheet shape, and an angle of approximately ninety degrees is formed between the reinforcing strip 33 and the inner side wall of the connecting member 3 .

[0019] Specifically, the connecting member 3 is a metal product or a plastic product.

[0020] Specifically, a first positioning portion 34 is formed on one side of the connecting member 3 that is in contact with the outer wall of the end portion of the support shaft 2, and a first positioning groove 23 for the first positioning portion 34 to be inserted into is provided at a position of the outer wall of the end portion of the support shaft 2 corresponding to the first positioning portion 34; a second positioning portion 35 is formed on one side of the connecting member 3 that is in contact with the inner wall of the frame 1, and a second positioning groove 13 for the second positioning portion 35 to be inserted into is provided at a position of the inner wall of the frame 1 corresponding to the second positioning portion 35.

[0021] Specifically, the first positioning portion 34 and the second positioning portion 35 are circular, polygonal or striped.

[0022] Specifically, a support portion 36 is formed on the side of the connecting member 3 away from the frame body 1, and the top and bottom of the support portion 36 are open to form a top opening and a bottom opening that are smaller at the top and larger at the bottom. The top opening is connected to the bottom opening, and the first screw can be screwed to the top opening of the support portion 36 and the frame body 1 in turn to lock the connecting member 3 with the frame body 1.

[0023] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A support shaft connection structure for a negative pressure fan, characterized in that: The invention comprises a negative pressure fan body, wherein the negative pressure fan body comprises a frame (1), a support shaft (2) vertically arranged on the frame (1), and a right-angled connecting member (3), wherein the two ends of the connecting member (3) are respectively in contact with the inner wall of the frame (1) and the outer wall of the end of the support shaft (2), and a first screw and a second screw are also provided, wherein the rod portion of the first screw is screwed to one end of the connecting member (3) and the inner side of the frame (1) in turn to lock the connecting member (3) with the frame (1), and the rod portion of the second screw is screwed to the other end of the connecting member (3) and the end of the support shaft (2) in turn to lock the connecting member (3) with the support shaft (2), thereby locking the support shaft (2) with the frame (1).

2. The support shaft connection structure of the negative pressure fan according to claim 1, characterized in that: The two ends of the connecting member (3) are respectively provided with a first screw hole (31) and a second screw hole (32); the inner wall of the frame (1) and the outer wall of the end of the support shaft (2) are respectively provided with a third screw hole (11) and a fourth screw hole (21); after the two ends of the connecting member (3) are respectively attached to the inner wall of the frame (1) and the outer wall of the end of the support shaft (2), the first screw hole (31) is aligned with the third screw hole (11) for the first screw rod to be screwed together, and the second screw hole (32) is aligned with the fourth screw hole (21) for the second screw rod to be screwed together.

3. The support shaft connection structure of the negative pressure fan according to claim 1, characterized in that: The connecting member (3) is L-shaped, with the shorter end of the connecting member (3) being in contact with the outer wall of the support shaft (2), and the longer end being in contact with the inner wall of the frame (1).

4. The support shaft connection structure of the negative pressure fan according to claim 3, characterized in that: The outer wall of the support shaft (2) is provided with a first recess (22) which is compatible with the shorter end of the connecting member (3) and is used for the shorter end of the connecting member (3) to be inserted therein; the inner wall of the frame body (1) is provided with a second recess (12) which is compatible with the longer end of the connecting member (3) and is used for the longer end of the connecting member (3) to be inserted therein.

5. The support shaft connection structure of the negative pressure fan according to claim 1, characterized in that: Reinforcement strips (33) extending from one end of the connecting member (3) to the other end are formed on both sides of the connecting member (3).

6. The support shaft connection structure of the negative pressure fan according to claim 5, characterized in that: The reinforcing strip (33) is in the form of a sheet, and an angle of approximately ninety degrees is formed between the reinforcing strip (33) and the inner side wall of the connecting member (3).

7. The support shaft connection structure of the negative pressure fan according to claim 1, characterized in that: The connecting member (3) is made of metal or plastic.

8. The support shaft connection structure of the negative pressure fan according to claim 1, characterized in that: A first positioning portion (34) is formed on a side of the connecting member (3) that is in contact with the outer wall of the end of the support shaft (2), and a first positioning groove (23) is provided at a position of the outer wall of the end of the support shaft (2) corresponding to the first positioning portion (34) and into which the first positioning portion (34) can extend; a second positioning portion (35) is formed on a side of the connecting member (3) that is in contact with the inner wall of the frame body (1), and a second positioning groove (13) is provided at a position of the inner wall of the frame body (1) corresponding to the second positioning portion (35) and into which the second positioning portion (35) can extend.

9. The support shaft connection structure of the negative pressure fan according to claim 8, characterized in that: The first positioning portion (34) and the second positioning portion (35) are circular, polygonal or stripe-shaped.

10. The support shaft connection structure of the negative pressure fan according to claim 1, characterized in that: A support portion (36) is formed on one side of the connecting member (3) away from the frame (1); the top and bottom of the supporting portion (36) are open to form a top opening and a bottom opening which are smaller at the top and larger at the bottom; the top opening is communicated with the bottom opening; the first screw rod can be screwed to the top opening of the supporting portion (36) and the frame (1) in sequence to lock the connecting member (3) with the frame (1).

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