A jet fan impeller positioning device

Abstract

This utility model discloses a jet fan impeller positioning device, relating to the field of impeller positioning technology. The utility model includes a fixed base, a fixed rod, a positioning rod, fastening rings, and a pushing component. The rotation of a first screw and a second screw drives two sets of fastening rings to move horizontally along their axial directions. One set of fastening rings slides on the surface of the fixed rod, pressing down on multiple sets of fixed rods until the fixed rods contact the surface of the fan shaft, fixing the device at the fan shaft. The other set of fastening rings slides on the surface of the positioning rod, pressing down on multiple sets of positioning rods until the positioning rods contact the surface of the fan impeller, connecting the device to the fan impeller. By relying on the connection between the fixed rod and the shaft, and the connection between the positioning rod and the impeller, the axis of the impeller coincides with the axis of the shaft. The device can install the impeller on a shaft already installed inside the fan housing, ensuring the impeller is stably installed on the shaft surface and its positioning is accurate.

Description

Technical Field

[0001] This utility model relates to the field of impeller positioning technology, specifically to a jet fan impeller positioning device. Background Technology

[0002] Jet fans are high-efficiency ventilation devices used in highway tunnels, subways, and other similar locations. The installation precision of their core component, the impeller, determines the fan's operating efficiency, noise level, and lifespan. The impeller must be precisely fitted into and fixed to the shaft connected to the drive motor through the center hole of its hub, ensuring a very high degree of coaxiality between the impeller and the shaft to prevent severe vibration and abnormal wear during operation.

[0003] When installing the impeller of a jet fan, a clamp on a workbench is commonly used to hold and fix the drive motor or its shaft and the impeller respectively on the workbench, allowing for fine adjustment of the impeller's position relative to the shaft. Chinese Patent No. CN221677017U discloses an axial flow fan impeller installation and positioning device, relating to the field of axial flow fans. It includes a movable base, with a counterweight fixedly connected to the upper end of the movable base. A connecting rod is fixedly connected to the upper edge of the movable base, and a short block is fixedly connected to one side of the connecting rod. A motor is installed inside the short block.

[0004] However, for the drive motor and shaft already installed inside the jet fan casing, the limited space inside the fan makes it difficult to build a positioning platform. The workbench and its matching fixing fixtures cannot be effectively set up and used inside the fan casing, which makes it difficult to ensure accurate and stable impeller installation and positioning. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a jet fan impeller positioning device, which solves the problem that impeller positioning needs to be performed on a working platform and the device is difficult to build inside the fan.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a jet fan impeller positioning device, comprising a fixed base, a fixed rod, a positioning rod, a fastening ring, and a pushing member. The fixed rod is hinged to the surface of the fixed base, and the free end of the fixed rod is rotatably connected to the positioning rod. The pushing member is disposed at the bottom of the fixed base, and the fastening ring is threadedly installed on the rotating end surface of the pushing member. There are two sets of fastening rings, and the two sets of fastening rings are slidably connected to the fixed rod and the positioning rod, respectively. The fixed rod is in contact with the surface of the fan shaft, and the positioning rod is in contact with the surface of the fan impeller.

[0007] The fixing base includes a fixing ring, a first connecting rod, and a base plate. The surface of the fixing ring has a notch. One end of the first connecting rod is hinged to one side of the notch, and the other end is slidably inserted into the other side of the notch. The base plate is fixedly installed on the bottom of the fixing ring.

[0008] The fixing rod includes a first support rod, a first support plate, a first sliding groove, a first protrusion, and an outer sleeve. The first support plate is fixedly installed on the side of the first support rod near the fastening ring. The surface of the first support plate is provided with an inclined surface, and the first sliding groove is opened on the inclined surface. The first protrusion is fixedly installed on the side of the first support rod away from the fastening ring. One end of the first support rod is hinged to the fixing seat, and the other end of the first support rod is connected to the outer sleeve.

[0009] The positioning rod includes a second support rod, a second support plate, a second sliding groove, a second protrusion, and an inner sleeve. The second support plate is fixedly installed on the side of the second support rod near the fastening ring. The surface of the second support plate is provided with an inclined surface, and a second sliding groove is opened on the inclined surface. The second protrusion is fixedly installed on the side of the second support rod away from the fastening ring. One end of the inner sleeve is connected to the fixing rod.

[0010] The fastening ring includes a ring body, a slider, a second connecting rod, and a slider ball. The slider is fixedly installed at the bottom of the ring body and is slidably installed on the surface of the pusher. A notch is opened on the surface of the ring body. One end of the second connecting rod is hinged to one side of the notch, and the other end is slidably inserted into the other side of the notch. The slider ball is fixedly installed on the inner wall of the ring body.

[0011] The pusher includes a guide plate, a first screw, a second screw, and a slot. The guide plate is fixedly installed at the bottom of the fixed base. The first screw is rotatably connected to the bottom of the fixed base, and the second screw is rotatably connected to the guide plate. Both the first screw and the second screw are hollow, and slots are provided on the inner walls of their adjacent ends.

[0012] The pusher also includes a rotating rod and a locking block. The rotating rod passes through the bottom of the fixed base and is slidably installed inside the first screw and the second screw. The locking block is fixedly installed on the surface of the rotating rod, and the locking block and the locking slot are correspondingly set.

[0013] The number of fixed rods and positioning rods is multiple sets, and the multiple sets of fixed rods and positioning rods are arranged in a circular array.

[0014] The beneficial effects of this utility model are as follows: This invention utilizes the rotation of the first and second screws to drive two sets of fastening rings to move horizontally along their axial directions. One set of fastening rings slides on the surface of the fixed rod, pressing multiple sets of fixed rods until the fixed rods contact the surface of the fan shaft, thus fixing the device at the fan shaft. The other set of fastening rings slides on the surface of the positioning rod, pressing multiple sets of positioning rods until the positioning rods contact the surface of the fan impeller, thus connecting the device to the fan impeller. By relying on the connection between the fixed rod and the shaft, and the connection between the positioning rod and the impeller, the axis of the impeller coincides with the axis of the shaft. The device can install the impeller on the shaft already installed inside the fan housing, ensuring the impeller is stably installed on the shaft surface and accurately positioned. By pulling the rotating rod to slide inside the first and second screws, the locking block is inserted into the locking groove of the first or second screw, switching the connection and fixation of the rotating rod with the first or second screw. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention installed inside the fan; Figure 2 This is a three-dimensional structural diagram of the fixed fan shaft and impeller of this utility model; Figure 3 This is a three-dimensional structural schematic diagram of the present invention; Figure 4 This is a partial structural disassembly diagram of the present invention; Figure 5 This is a schematic diagram showing the second partial structural disassembly of this utility model.

[0016] Reference numerals: 1. Fixed base; 101. Fixed ring; 102. First connecting rod; 103. Base plate; 2. Fixed rod; 201. First support rod; 202. First support plate; 203. First slide groove; 204. First protrusion; 205. Outer sleeve; 3. Positioning rod; 301. Second support rod; 302. Second support plate; 303. Second slide groove; 304. Second protrusion; 305. Inner sleeve; 4. Fastening ring; 401. Ring body; 402. Slider; 403. Second connecting rod; 404. Sliding ball; 5. Pushing component; 501. Guide plate; 502. First screw; 503. Second screw; 504. Slot; 505. Rotating rod; 506. Locking block. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0018] Figures 1-5 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 ~Attached Figure 5 The present invention will be further described below.

[0019] A jet fan impeller positioning device includes a fixed base 1, a fixed rod 2, a positioning rod 3, a fastening ring 4, and a pushing member 5. The fixed rod 2 is hinged to the surface of the fixed base 1, and the free end of the fixed rod 2 is rotatably connected to the positioning rod 3. The pushing member 5 is disposed at the bottom of the fixed base 1. The fastening ring 4 is threadedly installed on the rotating end surface of the pushing member 5. There are two sets of fastening rings 4, and the two sets of fastening rings 4 are slidably connected to the fixed rod 2 and the positioning rod 3, respectively. The fixed rod 2 is in contact with the surface of the fan shaft, and the positioning rod 3 is in contact with the surface of the fan impeller. Specifically, the fixed rod 2 and the positioning rod 3 are stably rotated on the surface of the fixed base 1, the fixed rod 2 is fixed to the surface of the fan shaft, the positioning rod 3 is fixed to the surface of the fan impeller, the fastening ring 4 is pressed to make the fixed rod 2 and the positioning rod 3 fit against the fan shaft and the impeller surface respectively, and the fastening ring 4 is pushed to move horizontally by the pusher 5.

[0020] The fixing base 1 includes a fixing ring 101, a first connecting rod 102 and a base plate 103. The surface of the fixing ring 101 has a notch. One end of the first connecting rod 102 is hinged to one side of the notch, and the other end is slidably inserted into the other side of the notch. The base plate 103 is fixedly installed on the bottom of the fixing ring 101. Specifically, the notch in the fixing ring 101 facilitates the fitting of the fixing ring 101 onto the surface of the fan shaft, and the first connecting rod 102 fills the notch in the fixing ring 101 to maintain the stability of the fixing ring 101.

[0021] The fixing rod 2 includes a first support rod 201, a first support plate 202, a first groove 203, a first protrusion 204, and an outer sleeve 205. The first support plate 202 is fixedly installed on the side of the first support rod 201 near the fastening ring 4. The surface of the first support plate 202 is provided with an inclined surface, and the first groove 203 is opened on the inclined surface. The first protrusion 204 is fixedly installed on the side of the first support rod 201 away from the fastening ring 4. One end of the first support rod 201 is hinged to the fixing ring 101, and the other end of the first support rod 201 is connected to the outer sleeve 205. Specifically, the rotation of the first support rod 201 causes the first protrusion 204 to contact the surface of the fan shaft. The inclined surface of the first support plate 202 causes the fastening ring 4 to slide at the first slide groove 203, which in turn causes the fixing rod 2 to move closer to or away from the fan shaft. The outer sleeve 205 supports the positioning rod 3 to rotate along that point.

[0022] The positioning rod 3 includes a second support rod 301, a second support plate 302, a second sliding groove 303, a second protrusion 304, and an inner sleeve 305. The second support plate 302 is fixedly installed on the side of the second support rod 301 near the fastening ring 4. The surface of the second support plate 302 is provided with an inclined surface, and the second sliding groove 303 is opened on the inclined surface. The second protrusion 304 is fixedly installed on the side of the second support rod 301 away from the fastening ring 4. One end of the inner sleeve 305 is connected to the outer sleeve 205. Specifically, the rotation of the second support rod 301 causes the second protrusion 304 to contact the surface of the fan impeller. The inclined surface of the second support plate 302 causes the fastening ring 4 to slide at the second slide groove 303, which in turn causes the positioning rod 3 to move closer to or away from the fan impeller. The inner sleeve 305 and the outer sleeve 205 are connected by rotation, and the positioning rod 3 is supported to rotate along one end of the fixed rod 2.

[0023] The fastening ring 4 includes a ring body 401, a slider 402, a second connecting rod 403, and a ball 404. The slider 402 is fixedly installed at the bottom of the ring body 401. The slider 402 is slidably installed on the surface of the pusher 5. The slider 402 is slidably sleeved on the surface of the guide plate 501. The slider 402 is threadedly installed on the surface of the first screw 502. A notch is opened on the surface of the ring body 401. One end of the second connecting rod 403 is hinged to one side of the notch, and the other end is slidably inserted into the other side of the notch. The ball 404 is fixedly installed on the inner wall of the ring body 401, and the ball 404 is correspondingly arranged with the fixed rod 2 and the positioning rod 3. The balls 404 of the two sets of fastening rings 4 are slidably connected to the first sliding groove 203 and the second sliding groove 303, respectively. Specifically, the notch in the ring 401 facilitates its fitting onto the surface of the fan shaft. The second connecting rod 403 fills the notch in the ring 401, maintaining its stability. The slider 402 supports the fastening ring 4, which moves horizontally with the rotating end of the pusher 5. The ball 404 is slidably connected to the first groove 203 and the second groove 303, controlling the rotation of the fixed rod 2 and the positioning rod 3. This causes the fixed rod 2 to move closer to or away from the fan shaft, and the positioning rod 3 to move closer to or away from the fan impeller.

[0024] The pusher 5 includes a guide plate 501, a first screw 502, a second screw 503, and a slot 504. The guide plate 501 is fixedly installed on the surface of the base plate 103. The first screw 502 is rotatably connected to the surface of the base plate 103, and the second screw 503 is rotatably connected to the guide plate 501. Both the first screw 502 and the second screw 503 are hollow, and a slot 504 is provided on the inner wall of the two adjacent ends. Specifically, the guide plate 501 guides the fastening ring 4 to slide stably, and the first screw 502 and the second screw 503 rotate to drive the two sets of fastening rings 4 to move horizontally.

[0025] The pusher 5 also includes a rotating rod 505 and a locking block 506. The rotating rod 505 passes through the bottom of the fixed base 1 and is slidably installed inside the first screw 502 and the second screw 503. A dial is fixedly installed at one end of the rotating rod 505. The locking block 506 is fixedly installed on the surface of the rotating rod 505, and the locking block 506 is correspondingly set with the slot 504. Specifically, by pulling the rotating rod 505 to slide inside the first screw 502 and the second screw 503, the locking block 506 is moved into the locking groove 504 of the first screw 502 or the second screw 503, and the rotating rod 505 drives the first screw 502 or the second screw 503 to rotate.

[0026] There are multiple sets of fixing rods 2 and positioning rods 3, and these multiple sets of fixing rods 2 and positioning rods 3 are arranged in a circular array. Specifically, the device is stably clamped to the surfaces of the shaft and impeller by multiple sets of fixing rods 2 and positioning rods 3 making multiple points of contact with the shaft and impeller surfaces.

[0027] In summary: When using this utility model, to ensure accurate impeller positioning during installation onto the shaft surface, the device is fitted onto the shaft surface through the notch in the fixing ring 101 and the ring body 401. Pulling the rotating rod 505 causes it to slide inside the first screw 502 and the second screw 503, moving the locking block 506 into the slot 504 of the first screw 502. Turning the dial rotates the rotating rod 505 and the locking block 506, thereby rotating the first screw 502. This controls the slider 402 on its surface to slide along the surface of the guide plate 501. The slider 402 causes the ball bearing 404 on the inner wall of the ring body 401 to slide inside the first groove 203, thus pushing the first support rod 201 to rotate along the fixing ring 101, controlling... The first protrusion 204 approaches the fan shaft until it contacts its surface, clamping the device to the shaft surface. Pushing the rotating rod 505 causes the locking block 506 to move into the slot 504 of the second screw 503. Twisting the rotating rod 505 again causes the second screw 503 to rotate, controlling the slider 402 on its surface to drive the ball 404 to slide inside the second groove 303, thereby pushing the second support rod 301 to make the inner sleeve 305 rotate along the outer sleeve 205. The second protrusion 304 is then brought close to the fan impeller until it contacts its surface, connecting and fixing the device to the impeller. The first protrusion 204 is connected to the shaft, and the second protrusion 304 is connected to the impeller, completing the alignment and positioning of their axes, ensuring the accuracy of the impeller after welding or bolting.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A jet fan impeller positioning device, characterized in that, The device includes a fixed base (1), a fixed rod (2), a positioning rod (3), a fastening ring (4), and a pusher (5). The fixed rod (2) is hinged to the surface of the fixed base (1). The free end of the fixed rod (2) is rotatably connected to the positioning rod (3). The pusher (5) is located at the bottom of the fixed base (1). The fastening ring (4) is threaded onto the rotating end surface of the pusher (5). There are two sets of fastening rings (4), and the two sets of fastening rings (4) are slidably connected to the fixed rod (2) and the positioning rod (3), respectively. The fixed rod (2) is in contact with the rotating shaft surface of the fan, and the positioning rod (3) is in contact with the impeller surface of the fan.

2. The jet fan impeller positioning device according to claim 1, characterized in that, The fixed base (1) includes a fixed ring (101), a first connecting rod (102) and a base plate (103). The surface of the fixed ring (101) has a notch. One end of the first connecting rod (102) is hinged to one side of the notch, and the other end is slidably inserted into the other side of the notch. The base plate (103) is fixedly installed on the bottom of the fixed ring (101).

3. The jet fan impeller positioning device according to claim 1, characterized in that, The fixing rod (2) includes a first support rod (201), a first support plate (202), a first groove (203), a first protrusion (204), and an outer sleeve (205). The first support plate (202) is fixedly installed on the side of the first support rod (201) near the fastening ring (4). The surface of the first support plate (202) is provided with an inclined surface, and the first groove (203) is provided on the inclined surface. The first protrusion (204) is fixedly installed on the side of the first support rod (201) away from the fastening ring (4). One end of the first support rod (201) is hinged to the fixing seat (1), and the other end of the first support rod (201) is connected to the outer sleeve (205).

4. The jet fan impeller positioning device according to claim 1, characterized in that, The positioning rod (3) includes a second support rod (301), a second support plate (302), a second slide groove (303), a second protrusion (304), and an inner sleeve (305). The second support plate (302) is fixedly installed on the side of the second support rod (301) near the fastening ring (4). The surface of the second support plate (302) is provided with an inclined surface, and the second slide groove (303) is provided on the inclined surface. The second protrusion (304) is fixedly installed on the side of the second support rod (301) away from the fastening ring (4). One end of the inner sleeve (305) is connected to the fixing rod (2).

5. The jet fan impeller positioning device according to claim 1, characterized in that, The fastening ring (4) includes a ring body (401), a slider (402), a second connecting rod (403), and a ball (404). The slider (402) is fixedly installed at the bottom of the ring body (401). The slider (402) is slidably installed on the surface of the pusher (5). A notch is opened on the surface of the ring body (401). One end of the second connecting rod (403) is hinged to one side of the notch, and the other end is slidably inserted into the other side of the notch. The ball (404) is fixedly installed on the inner wall of the ring body (401).

6. The jet fan impeller positioning device according to claim 1, characterized in that, The pusher (5) includes a guide plate (501), a first screw (502), a second screw (503), and a slot (504). The guide plate (501) is fixedly installed on the bottom of the fixed base (1). The first screw (502) is rotatably connected to the bottom of the fixed base (1). The second screw (503) is rotatably connected to the guide plate (501). Both the first screw (502) and the second screw (503) are hollow, and a slot (504) is provided on the inner wall of the two adjacent ends.

7. The jet fan impeller positioning device according to claim 6, characterized in that, The pusher (5) also includes a rotating rod (505) and a locking block (506). The rotating rod (505) passes through the bottom of the fixed base (1) and is slidably installed inside the first screw (502) and the second screw (503). The locking block (506) is fixedly installed on the surface of the rotating rod (505), and the locking block (506) and the locking groove (504) are correspondingly set.

8. The jet fan impeller positioning device according to claim 1, characterized in that, The number of fixed rods (2) and positioning rods (3) is multiple sets, and the multiple sets of fixed rods (2) and positioning rods (3) are arranged in a circular array.

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