Dynamic balance degree testing equipment

Abstract

The utility model relates to a dynamic balance degree test device comprising a mounting rack. A rotary driving end is arranged in the mounting frame; the rotary driving end is connected with a mounting block, and a tensioning mechanism is arranged in the mounting block; the tensioning mechanism comprises an abutting block; the abutting block makes contact with a sleeve of the fan. The tensioning mechanism further comprises a tensioning block; the tensioning block is in contact with the inner wall of the sleeve; an end cover is arranged at one end of the sleeve; the end cover is connected with the mounting block through a fastener; and the sleeve is positioned between the end cover and the mounting block. During a dynamic balance test, only the fan sleeve needs to be inserted into the outer surface of the mounting block; the fan sleeve is firmly pressed on the mounting block in the axial direction through the end cover; meanwhile, due to the existence of the tensioning mechanism, the sleeve can be tensioned from inside to outside in a mechanical abutting mode, so that the fan sleeve and the mounting block can be relatively fixed.

Description

Technical Field

[0001] The utility model relates to a testing device, in particular to a dynamic balance testing device, belonging to the technical field of fans, especially special fan testing devices for brushless motors. Background Art

[0002] The fan dedicated to the brushless motor can be driven by the rotor of the brushless motor to rotate through the rotating shaft, provide airflow inside the brushless motor, and play a role in heat dissipation. However, after the fan is produced and assembled, if the weight distribution between the blades is uneven, resulting in uneven weight between the fan blades, the blades will move radially during high-speed rotation, generating noise; at the same time, since the fan is installed in the end cover of the brushless motor, the internal space of the end cover is small. Once the blades move, they are easy to collide with the end cover, causing damage. Therefore, the dynamic balance test of the fan before leaving the factory is extremely important. In the prior art, when performing the dynamic balance test, it has always been a major problem to fix the fan circumferentially, because the fan cannot be destroyed during the test process, and it is impossible to set additional fasteners in the circumference of the fan; therefore, additional fastening holes can only be set in the circumference of the shaft hole of the fan sleeve, which increases the difficulty and cost of fan production. Therefore, further improvement is needed. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned shortcomings and provide a dynamic balance test device, which does not require additional holes to be opened on the fan, has a stable fan sleeve connection, a simple and reasonable structure, and a convenient and quick disassembly process.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A dynamic balance testing device comprises a mounting frame; a rotary driving end is arranged in the mounting frame; the rotary driving end is connected to a mounting block, and a tensioning mechanism is arranged in the mounting block; the tensioning mechanism comprises a supporting block; the supporting block contacts with a sleeve of a fan; the tensioning mechanism further comprises a tensioning block; the tensioning block contacts with an inner wall of the sleeve; an end cover is arranged at one end of the sleeve; the end cover is connected to the mounting block by a fastener; and the sleeve is located between the end cover and the mounting block.

[0006] Furthermore, a guide hole is provided in the mounting block; a guide groove connected to the guide hole is provided on the surface of the mounting block; the abutment block includes a horizontal block and a vertical block; the horizontal block is slidably connected in the guide hole; the vertical block is located on the surface of one end of the horizontal block; and the upper end of the vertical block is outside the guide groove.

[0007] Furthermore, the horizontal block has a wedge-shaped end on the other side relative to the vertical block; one side of the horizontal block is connected to the guide hole through a spring.

[0008] Furthermore, a limiting groove is provided in the guide groove; protrusions are provided on both sides of the tensioning block; the protrusions are slidably connected in the limiting groove; the tensioning block slides in the vertical direction of the guide groove; and the protrusions are connected to the limiting groove through a spring.

[0009] Furthermore, the wedge-shaped end is located below the tension block; the wedge-shaped end is slidably connected to the tension block; and the height of the wedge-shaped end gradually increases from one side of the tension block.

[0010] Furthermore, a first screw hole is formed on the end surface of the mounting block; a second screw hole is formed on the end cover; the fastener is a screw; the screw passes through the axial hole on the sleeve and connects the first screw hole and the second screw hole.

[0011] Furthermore, the tensioning mechanisms include at least three; the tensioning mechanisms are evenly distributed along the circumference of the mounting block.

[0012] The utility model has the following beneficial effects: during the dynamic balancing test, it is only necessary to insert the fan sleeve into the outer surface of the mounting block; and the fan sleeve is firmly pressed onto the mounting block along the axial direction through the end cover; at the same time, due to the presence of the tensioning mechanism, the sleeve can be tensioned from the inside to the outside by means of mechanical abutment, so that the fan sleeve and the mounting block can be relatively fixed, thereby avoiding relative movement of the fan sleeve due to unstable circumferential fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the connection between the sleeve and the mounting block.

[0014] Figure 2 It is a structural schematic diagram of the tensioning mechanism.

[0015] Figure 3 This is an enlarged schematic diagram of part A.

[0016] In the figure: 1 is a mounting frame, 2 is a rotary drive end, 3 is a mounting block, 3-1 is a guide hole, 3-2 is a guide groove, 4 is a support block, 4-1 is a horizontal block, 4-2 is a vertical block, 4-3 is a wedge-shaped end, 5 is a sleeve, 6 is a tension block, 6-1 is a protrusion, 7 is an end cover, 8 is a first screw hole, 9 is a second screw hole, and 10 is an axis hole. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model 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.

[0018] The terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art, unless the terms are defined differently. It should be understood that the terms defined in commonly used dictionaries have the same meaning as those in the prior art.

[0019] See also Figure 1-Figure 3

[0020] A dynamic balance test device comprises a mounting frame 1; a rotary drive end 2 is arranged in the mounting frame 1; the rotary drive end 2 is connected to a mounting block 3, and a tensioning mechanism is arranged in the mounting block 3; the tensioning mechanism comprises a supporting block 4; the supporting block 4 is in contact with a sleeve 5 of a fan; the tensioning mechanism further comprises a tensioning block 6; the tensioning block 6 is in contact with an inner wall of the sleeve 5; an end cover 7 is arranged at one end of the sleeve 5; the end cover 7 is connected to the mounting block 3 by a fastener; the sleeve 5 is located between the end cover 7 and the mounting block 3.

[0021] Furthermore, a guide hole 3-1 is provided in the mounting block 3; a guide groove 3-2 connected to the guide hole 3-1 is provided on the surface of the mounting block 3; the abutment block 4 includes a horizontal block 4-1 and a vertical block 4-2; the horizontal block 4-1 is slidably connected in the guide hole 3-1; the vertical block 4-2 is located on the surface of one end of the horizontal block 4-1; and the upper end of the vertical block 4-2 is located outside the guide groove 3-2.

[0022] Furthermore, the horizontal block 4-1 has a wedge-shaped end 4-3 on the other side relative to the vertical block 4-2; one side of the horizontal block 4-1 is connected to the guide hole 3-1 through a spring.

[0023] Furthermore, a limiting groove is provided in the guide groove 3-2; protrusions 6-1 are provided on both sides of the tensioning block 6; the protrusions 6-1 are slidably connected in the limiting groove; the tensioning block 6 slides in the vertical direction of the guide groove 3-2; the protrusions 6-1 are connected to the limiting groove through a spring.

[0024] Furthermore, the wedge-shaped end 4-3 is located below the tension block 6; the wedge-shaped end 4-3 is slidably connected to the tension block 6; and the height of the wedge-shaped end 4-3 gradually increases from one side of the tension block 6.

[0025] Furthermore, a first screw hole 8 is formed on the end face of the mounting block 3; a second screw hole 9 is formed on the end cover; the fastener is a screw; the screw passes through the axial hole on the sleeve and connects the first screw hole and the second screw hole.

[0026] Furthermore, the tensioning mechanisms include at least three; the tensioning mechanisms are evenly distributed along the circumference of the mounting block.

[0027] When the sleeve 5 is inserted axially and is hooked on the outside of the mounting block 3, one end of the sleeve 5 will come into contact with the abutment block 4 and push the vertical block 4-2 in the abutment block 4 to move inward along the guide groove 3-2; during the movement of the vertical block 4-2, the horizontal block 4-1 will be pulled to move synchronously with it. When the horizontal block 4-1 is moving, the wedge-shaped end 4-3 at one end thereof gradually comes into contact with the bottom of the tensioning block 6. As the height of the wedge-shaped end 4-3 gradually increases, the tensioning block 6 will be pushed upward until the upper end of the tensioning block 6 abuts against the inner side of the sleeve. The end cover 7 is covered on the end surface of the sleeve 4, and then the screw is passed through the first screw hole, the shaft hole and the second screw hole, and tightened, so that the end cover 7 can firmly press the sleeve 5 on the mounting block 3. This pressing can make the sleeve always push the vertical block 4-2 to the farthest position, so that the wedge-shaped end 4-3 can always push up the tension block 6, so that the tension block 6 forms tension on the sleeve. This tension is formed by mechanical transmission, which is firm and reliable.

[0028] Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the utility model rather than limiting it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A dynamic balance test device, comprising a mounting frame; a rotary drive end is arranged in the mounting frame; the rotary drive end is connected to a mounting block, characterized in that: A tensioning mechanism is arranged in the mounting block; the tensioning mechanism includes a supporting block; the supporting block is in contact with the sleeve of the fan; the tensioning mechanism also includes a tensioning block; the tensioning block is in contact with the inner wall of the sleeve; an end cover is arranged at one end of the sleeve; the end cover is connected to the mounting block by a fastener; the sleeve is located between the end cover and the mounting block.

2. A dynamic balance test device according to claim 1, characterized in that: A guide hole is provided in the mounting block; a guide groove connected to the guide hole is provided on the surface of the mounting block; the abutment block includes a horizontal block and a vertical block; the horizontal block is slidably connected in the guide hole; the vertical block is located on the surface of one end of the horizontal block; and the upper end of the vertical block is outside the guide groove.

3. A dynamic balance test device according to claim 2, characterized in that: The other side of the horizontal block relative to the vertical block has a wedge-shaped end; one side of the horizontal block is connected to the guide hole through a spring.

4. A dynamic balance test device according to claim 3, characterized in that: A limiting groove is arranged in the guide groove; protrusions are arranged on both sides of the tensioning block; the protrusions are slidably connected in the limiting groove; the tensioning block slides in the vertical direction of the guide groove; the protrusions are connected in the limiting groove through a spring.

5. A dynamic balance test device according to claim 4, characterized in that: The wedge-shaped end is located below the tension block; the wedge-shaped end is slidably connected to the tension block; and the height of the wedge-shaped end gradually increases from one side of the tension block.

6. A dynamic balance test device according to claim 5, characterized in that: The end surface of the mounting block is provided with a first screw hole; the end cover is provided with a second screw hole; the fastener is a screw; the screw passes through the axial hole on the sleeve and connects the first screw hole and the second screw hole.

7. The dynamic balance test device according to claim 1, characterized in that: The tensioning mechanisms include at least three; the tensioning mechanisms are evenly distributed along the circumference of the mounting block.

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