A device for pressing locking gasket in double-hole positioning assembly machinery

Abstract

The invention provides a device for pressing and locking a gasket in a double-hole positioning assembly machine, comprising a mechanism body, a cover plate, an eccentric cam, an extrusion block and a rotating shaft, wherein the cover plate is mounted on the mechanism body, and one end of the mechanism body is provided with a hexagonal hole so that the mechanism body is sleeved on the hexagonal nut of the shaft head of the fan, a center positioning step hole is formed on the mechanism body, an auxiliary positioning hole is formed below the cover plate, the eccentric cam is placed in the center positioning step hole, an extrusion cavity is formed on the mechanism body, the extrusion block is placed in the extrusion cavity and abuts against the eccentric cam, and the rotating shaft is sequentially extended into the auxiliary positioning hole, the eccentric cam and the center positioning step hole. When in use, the center lines of the two positioning holes are in line with the cross-sectional circle diameter of the motor rotating shaft, so that the eccentric cam pushes the extrusion block to perform linear motion on the center lines of the two positioning holes, thereby ensuring that the flanging direction of the shaft head locking gasket is straight, the operation precision is high, avoiding the disadvantages caused by large directional deviation due to arbitrary operation with a hammer and damage to the end face of the rotating shaft by a chisel, and improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of axial flow fan manufacturing, and in particular to a device for pressing and locking a gasket in a double-hole positioning assembly machine. Background Art

[0002] In the manufacturing process of modern axial flow fans, the impeller shaft head locking mechanism is an indispensable component. At present, most axial flow fans use wing-type impellers. The basic mechanism is that the blades of varying numbers are evenly distributed around the hub or disc. The hub, disc and blades of the impeller have various shapes. Each form of axial flow fan impeller has its own unique manufacturing process. Among the various wing-type impellers, there is a disc that is relatively unique, that is, the impeller with a V-shaped body. The space around the hub is very limited. After the impeller is pressed, the shaft head locking mechanism is difficult to lock with conventional hammers and chisels, and it is easy to damage the disc, causing great economic losses. Summary of the invention

[0003] The purpose of the present invention is to provide a device for tightening a locking gasket in a double-hole positioning assembly machine, aiming to solve the technical problem in the prior art that for an impeller with a V-shaped main body of the whole machine, the space around the hub is very limited, and after the impeller is pressed, the shaft head locking mechanism is difficult to lock with a conventional hand hammer and chisel and is easy to damage the wheel disc, which will cause great economic losses.

[0004] The technical solution of the present invention is as follows:

[0005] A device for compressing a locking gasket in a double-hole positioning assembly machine, comprising a mechanism body, a cover plate, an eccentric cam, an extrusion block and a rotating shaft, wherein the cover plate is mounted on the mechanism body, a hexagonal hole is provided below one end of the mechanism body, the hexagonal hole matches with the hexagonal nut on the shaft head of the fan impeller hub, so that the mechanism body can be sleeved on the hexagonal nut on the shaft head of the fan, a center positioning step hole is formed on the side of the mechanism body mounted with the cover plate at a position away from the hexagonal hole, and a center positioning step hole is formed below the cover plate at a position corresponding to the center positioning step hole An auxiliary positioning hole with the same axis as the central positioning step hole is formed, the eccentric cam is placed at the step of the central positioning step hole, the through hole of the eccentric cam is on the same axis as the central positioning step hole, an extrusion cavity adjacent to and connected to the central positioning step hole is formed between the hexagonal hole and the central positioning step hole of the mechanism body, the extrusion block is placed in the extrusion cavity and abuts against the side of the eccentric cam, the rotating shaft extends into the auxiliary positioning hole, the eccentric cam and the central positioning step hole in sequence, and one end of the rotating shaft extending into the eccentric cam is connected to the eccentric cam key.

[0006] Furthermore, the center lines of the central positioning step hole and the auxiliary positioning hole are colinear with the cross-sectional circle diameter of the motor shaft, so that the eccentric cam pushes the extrusion block to perform linear motion on the center line of the two positioning holes, ensuring that the direction of the flange of the shaft head locking gasket is straight.

[0007] Furthermore, the head of the rotating shaft exposed from the cover plate is hexagonal in shape, and a threaded hole is provided in the middle of the rotating shaft to be connected with the handle.

[0008] Furthermore, the cover plate is detachably connected to the mechanism body via hexagon socket screws.

[0009] Furthermore, a conical pin is also included for connecting the cover plate and the mechanism body, and the conical pin is used for expansion and fixing the mechanism body and the cover plate.

[0010] Furthermore, the upper half of the eccentric cam is a sector-shaped disc with a center angle of , and the lower half is a sector-shaped disc with a center angle of .

[0011] Furthermore, the extrusion block is divided into a flat iron and an inclined iron, and the middle part of the inclined iron is processed into an inclined surface.

[0012] Furthermore, a knurled nut is provided at the position of the hexagonal hole on the side of the mechanism body mounted with the cover plate.

[0013] The beneficial effect of the present invention is that a hexagonal bolt hole for positioning the fan shaft head is provided on the main body of the mechanism, and the center lines of the two positioning holes are colinear with the cross-sectional circle diameter of the motor shaft, so that the eccentric cam pushes the extrusion block to perform linear motion on the center lines of the two positioning holes, thereby ensuring that the direction of the flange of the shaft head locking gasket is straight, the operation accuracy is high, and the shortcomings caused by arbitrary large direction deviation when operating with a hand hammer and damage to the end face of the shaft by a chisel are avoided, thereby improving production efficiency.

[0014] The present invention adopts a phased operation, and the extrusion block is divided into an inclined iron and a flat iron. The inclined iron is used to pry and bend the shaft head locking gasket from a horizontal state to 45 degrees. After replacing the flat iron, the cam pushes the flat iron to squeeze the shaft head locking gasket tightly against the side of the fan shaft head nut, and the circular arc motion of the rotating shaft and the eccentric cam is converted into the horizontal linear motion of the extrusion block in the extremely limited space of the fan impeller. The extrusion force is evenly output to make the shaft head locking gasket flat and evenly close to the side of the shaft head nut, thereby converting the original simple knocking action into a more precise mechanical transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic side view of the overall structure cross section of an embodiment of the present invention;

[0016] Figure 2 It is a schematic front view of the overall structural cross section of an embodiment of the present invention;

[0017] Figure 3It is a schematic front view of the main structure of the mechanism of an embodiment of the present invention;

[0018] Figure 4 It is a schematic side view of a cross-section of the main structure of the mechanism of an embodiment of the present invention;

[0019] Figure 5 It is a front view schematic diagram of the cover plate structure according to an embodiment of the present invention;

[0020] Figure 6 It is a schematic cross-sectional side view of a cover plate structure according to an embodiment of the present invention;

[0021] Figure 7 It is a front view schematic diagram of the rotating shaft structure of an embodiment of the present invention;

[0022] Figure 8 It is a front view schematic diagram of the eccentric cam structure of an embodiment of the present invention;

[0023] Fig. 9 It is a schematic front view of the flat iron structure of the extrusion block according to an embodiment of the present invention;

[0024] Fig.10 It is a front view schematic diagram of the oblique iron structure of the extrusion block according to an embodiment of the present invention;

[0025] Fig.11 It is a schematic side view of the cross section of the oblique iron structure of the extruded block according to an embodiment of the present invention.

[0026] In the accompanying drawings: handle 1, rotating shaft 2, cover plate 3, eccentric cam 5, extrusion block 6, knurled nut 7, mechanism body 8, auxiliary positioning hole 31, hexagonal hole 80, center positioning step hole 81, extrusion cavity 82. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0032] like Figures 1 to 11 The embodiment of a device for pressing a locking gasket in a double-hole positioning assembly machine is shown, which includes a mechanism body 8, a cover plate 3, an eccentric cam 5, an extrusion block 6 and a rotating shaft 2. The cover plate 3 is installed on the mechanism body 8. A hexagonal hole 80 is provided below one end of the mechanism body 8. The hexagonal hole 80 cooperates with the hexagonal nut on the shaft head of the fan impeller hub, so that the mechanism body 8 can be sleeved on the hexagonal nut on the shaft head of the fan. A center positioning step hole 81 is formed on the side of the mechanism body 8 installed with the cover plate 3 at a position away from the hexagonal hole 80. An auxiliary positioning hole 3 with the same axis as the center positioning step hole 81 is formed below the cover plate 3 at a position corresponding to the center positioning step hole 81. 1, the eccentric cam 5 is placed at the step of the center positioning step hole 81, the through hole of the eccentric cam 5 is on the same axis as the center positioning step hole 81, the mechanism body 8 is formed with an extrusion cavity 82 adjacent to and connected to the center positioning step hole 81 between the hexagonal hole 80 and the center positioning step hole 81, the extrusion block 6 is placed in the extrusion cavity 82 and abuts against the side of the eccentric cam 5, the rotating shaft 2 is sequentially extended into the auxiliary positioning hole 31, the eccentric cam 5 and the center positioning step hole 81, and one end of the rotating shaft 2 extending into the eccentric cam 5 is key-connected to the eccentric cam 5 (the connecting key is a standard A key), an M4 threaded through hole is drilled in the center of the key, and the key is locked in the keyway of the rotating shaft 2 through the M4 threaded through hole.

[0033] In this embodiment, the center lines of the central positioning step hole 81 and the auxiliary positioning hole 31 are colinear with the cross-sectional circle diameter of the motor shaft, so that the eccentric cam 5 pushes the extrusion block 6 to perform linear motion on the center line of the two positioning holes, ensuring that the direction of the flange of the shaft head locking gasket is straight.

[0034] In this embodiment, the head of the rotating shaft 2 exposed from the cover plate 3 is hexagonal in shape, which is convenient for use with a socket wrench. An M10 threaded hole is provided in the middle of the rotating shaft 2 to connect with the handle 1. The handle 1 is made of 45# round steel. The holding position of the handle 1 is processed into knurling for easy hand-held operation, providing an operating component for the rotational power of the rotating shaft 2.

[0035] In this embodiment, the cover plate 3 is detachably connected to the mechanism body 8 by tightening the screws through four hexagon socket screw holes arranged at intervals.

[0036] In this embodiment, a conical pin is also included for connecting the cover plate 3 and the mechanism body 8. The conical pin is a standard part and is used to tighten and fix the mechanism body 8 and the cover plate 3 to ensure stable installation between the two.

[0037] In this embodiment, the upper half of the eccentric cam 5 is a sector-shaped disk with a central angle of 96 degrees and a radius of 23 mm, and the lower half is a sector-shaped disk with a central angle of 264 degrees and a radius of 20 mm. The semicircular heads at both ends are cut and thinned to 3 mm. When the eccentric cam 5 rotates 120 degrees counterclockwise, the eccentricity is 7 mm, and when it rotates 132 degrees, the eccentricity is 8 mm.

[0038] In this embodiment, the handle 1 is rotated counterclockwise to 120 degrees to drive the rotating shaft 2 to push the eccentric cam 5 to squeeze the extrusion block 6 to bend the shaft head locking gasket of the fan impeller to 45 degrees.

[0039] Furthermore, the handle 1 is rotated counterclockwise to 132 degrees to drive the rotating shaft 2 to push the eccentric cam 5 to squeeze the flat iron of the squeezing block 6 to gradually fit the shaft head locking gasket of the fan impeller to the side of the fan shaft head nut from 45 degrees.

[0040] In this embodiment, the extrusion block 6 is divided into a flat iron and an inclined iron, and a 33 mm portion in the middle of the inclined iron is processed into an inclined surface.

[0041] In this embodiment, a knurled nut 7 is provided at the position of the hexagonal hole 80 on the side of the mechanism body 8 installed with the cover plate 3. The knurled nut 7 is made of Q235A steel plate and is used to fix the mechanism body 8 on the shaft extension thread of the fan. For a double-impeller fan with opposite shaft extension threads at both ends, one left thread and one right thread can be made.

[0042] When in use, first assemble the hexagonal hole 80 of the mechanism body 8 with the hexagonal nut of the fan shaft head, and fasten the knurled nut 7 to the shaft head nut to form a stable whole; then install the bevel iron of the extrusion block 6 in the extrusion cavity 82 of the mechanism body 8; then align the shaft hole of the eccentric cam 5 with the shaft hole of the mechanism body 8, and note that the keyway of the eccentric cam 5 needs to face directly upward (i.e., the 12 o'clock direction); then extend the shaft 2 into the auxiliary positioning hole 31, the eccentric cam 5 and the center positioning step hole 81 in turn, and one end of the shaft 2 extending into the eccentric cam 5 is key-connected with the eccentric cam 5; then fasten the cover plate 3 to the mechanism body 8 with a hexagon socket screw; then screw the handle 1 into the threaded hole of the shaft 2; and then tighten and fix the cover plate 3 and the mechanism body 8 with a conical pin.

[0043] When the fan shaft head locking gasket needs to be pried and bent, first install the oblique iron of the extrusion block 6 into the extrusion cavity 82 of the mechanism body 8, use the knurled nut 7 to install the tooling as a whole on the motor shaft, and turn the handle counterclockwise by 1 to 120 degrees to pry the shaft head locking gasket from a horizontal state to 45 degrees; the second step is to loosen the knurled nut 7, remove the tooling and replace it with the flat iron of the extrusion block 6; the third step is to install the entire tooling on the motor shaft with the knurled nut 7, and turn the handle counterclockwise by 1 to 132 degrees to extrude the shaft head locking gasket from 45 degrees to a vertical state and fit it against the side of the shaft head nut. At this point, the fan shaft nut and shaft locking gasket have completed the flanging operation, avoiding a series of problems such as the impeller being hit by a hammer, the shaft locking gasket being broken, and the high difficulty of operation for workers. It also solves the technical problem that for the V-shaped impeller of the whole machine body, the space around the hub is very limited, and the shaft locking mechanism is difficult to lock with a conventional hammer and chisel after the impeller is pressed, and it is easy to damage the wheel disc, which will cause great economic losses.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A device for tightening a locking gasket in a double-hole positioning assembly machine, characterized in that: The invention comprises a mechanism body (8), a cover plate (3), an eccentric cam (5), an extrusion block (6) and a rotating shaft (2), wherein the cover plate (3) is mounted on the mechanism body (8), a hexagonal hole (80) is provided below one end of the mechanism body (8), the hexagonal hole (80) cooperates with a shaft head hexagonal nut on a fan impeller hub, so that the mechanism body (8) can be sleeved on the shaft head hexagonal nut of the fan, a center positioning step hole (81) is formed on a side of the mechanism body (8) mounted on the cover plate (3) at a position away from the hexagonal hole (80), and a central positioning step hole (81) is formed on the bottom of the cover plate (3) at a position corresponding to the central positioning step hole (81) and having the same axis as the central positioning step hole (81). The auxiliary positioning hole (31), the eccentric cam (5) is placed at the step of the central positioning step hole (81), the through hole of the eccentric cam (5) and the central positioning step hole (81) are coaxial, the mechanism body (8) forms an extrusion cavity (82) between the hexagonal hole (80) and the central positioning step hole (81) and is adjacent to and communicates with the central positioning step hole (81), the extrusion block (6) is placed in the extrusion cavity (82) and abuts against the side of the eccentric cam (5), the rotating shaft (2) extends into the auxiliary positioning hole (31), the eccentric cam (5) and the central positioning step hole (81) in sequence, and one end of the rotating shaft (2) extending into the eccentric cam (5) is key-connected to the eccentric cam (5); The head of the rotating shaft (2) exposed from the cover plate (3) is hexagonal in shape, and a threaded hole is provided in the middle of the rotating shaft (2) for connection with the handle (1); The cover plate (3) is detachably connected to the mechanism body (8) via hexagon socket screws; The extrusion block (6) causes the locking gasket to be flanging to achieve locking.

2. A device for compressing a locking gasket in a double-hole positioning assembly machine according to claim 1, characterized in that: Also included for connecting the cover plate (3) and the mechanism body (8) is a conical pin, which is used to tighten and fix the mechanism body (8) and the cover plate (3).

3. A device for tightening a locking gasket in a double-hole positioning assembly machine according to claim 1, characterized in that: The upper half of the eccentric cam (5) is a sector-shaped disc with a central angle of 96 degrees, and the lower half is a sector-shaped disc with a central angle of 264 degrees.

4. A device for compressing a locking gasket in a double-hole positioning assembly machine according to claim 1, characterized in that: The extrusion block (6) is divided into a flat iron and an inclined iron, and the middle part of the inclined iron is processed into an inclined surface.

5. The device for pressing a locking gasket in a double-hole positioning assembly machine according to claim 1, characterized in that: A knurled nut (7) is provided at the position of the hexagonal hole (80) on the side of the mechanism body (8) mounted on the cover plate (3).

Images