Air compressor and high-torque belt pulley structure thereof

Abstract

The high-torque belt pulley structure of the air compressor comprises an outer ring, an inner ring and blades, the inner ring and the outer ring are coaxially arranged, the multiple blades are evenly distributed along the axis of the inner ring, one end of each blade is fixedly connected with the inner wall of the outer ring, the other end of each blade is fixedly connected with the outer wall of the inner ring, and the inner ring and the outer ring are coaxially arranged. The inner wall of the outer ring is fixedly connected with a plurality of guide rods, the guide rods are uniformly distributed along the axis of the outer ring, the length direction of the guide rods is arranged along the axial direction of the inner ring, the guide rods are connected with balancing weights, and the balancing weights are connected with the guide rods through positioning mechanisms, so that the purpose of conveniently adjusting dynamic balance is achieved.

Description

Technical Field

[0001] The utility model relates to an air compressor and a high-torque pulley structure thereof. Background Art

[0002] At present, a Chinese patent with authorization announcement number CN202144857U discloses an air compressor fan pulley, which includes an inner ring, an outer ring and multiple fan blades. The multiple fan blades are evenly distributed between the inner ring and the outer ring. The two ends of the fan blades are respectively fixed to the inner ring and the outer ring. The two sides of the fan blades are inclined. A shaft sleeve is provided in the inner ring and is sleeved on the rotating shaft of the air compressor. The shaft sleeve connects the two ends of the entire inner ring. A plurality of belt grooves for belt transmission are provided on the circumferential outer surface of the outer ring.

[0003] The fan blade replaces the traditional hub connection, so that the pulley can also dissipate heat for the air compressor during the transmission process, effectively extending the service life of the air compressor. When in use, the drive shaft is inserted into the sleeve, and then the connection key contacts the keyway on the sleeve to realize the rotation of the pulley. However, after the pulley is repaired by welding and grinding, it will have a certain impact on the dynamic balance of the pulley and cannot adapt to high-speed rotation. Utility Model Content

[0004] In view of this, the utility model aims to provide an air compressor and a high torque pulley structure thereof, which can adjust the dynamic balance by setting a counterweight block to adapt to the effect of high-speed rotation.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a high-torque pulley structure, comprising an outer ring, an inner ring and blades, the inner ring and the outer ring are coaxially arranged, and the plurality of blades are evenly distributed along the axis of the inner ring, one end of the blade is fixedly connected to the inner wall of the outer ring, and the other end is fixedly connected to the outer wall of the inner ring, a plurality of guide rods are fixedly connected to the inner wall of the outer ring, the plurality of guide rods are evenly distributed along the axis of the outer ring, the length direction of the guide rod is arranged along the axial direction of the inner ring, a counterweight block is connected to the guide rod, and the counterweight block is connected to the guide rod through a positioning mechanism.

[0006] To implement the above technical solution, the driving shaft drives the inner ring to rotate, the inner ring drives the outer ring to rotate through the blades, the counterweight is moved along the length direction of the guide rod, and the distance between the counterweight and the inner ring is adjusted. The greater the distance, the greater the bending moment, and the smaller the distance, the smaller the bending moment. The counterweight is then fixed to the guide rod through a positioning mechanism so that the pulley can adapt to high torque, high-speed and stable operation.

[0007] As a preferred solution of the utility model, the positioning mechanism includes a threaded groove, a threaded sleeve, and a limit assembly. A support is fixedly connected to the outer ring, and both ends of the guide rod are respectively fixedly connected to the support. The threaded groove is opened on the guide rod, and the threaded sleeve is fixed on the inner wall of the counterweight block and threadedly connected to the threaded groove. A limit assembly for limiting the rotation of the counterweight block is provided on the support.

[0008] To implement the above technical solution, the counterweight block drives the threaded sleeve to rotate, so that the counterweight block can move along the length direction of the guide rod to adjust the straight-line distance between the counterweight block and the inner ring, and then the rotation of the counterweight block is limited by the limit assembly, thereby achieving the purpose of positioning the counterweight block.

[0009] As a preferred solution of the utility model, the limiting assembly includes a slide groove, a slide plate, and a limiting groove. A plurality of the limiting grooves are opened on the outer wall of the counterweight block and are evenly distributed along the axis of the threaded sleeve. The slide groove is opened on the support and is arranged along the radial direction of the outer ring. The two ends of the slide plate are slidably connected to the slide groove, and the middle part of the slide plate is embedded in the limiting groove.

[0010] To implement the above technical solution, the two ends of the skateboard are slidably connected in the slide groove, and the middle part of the skateboard is embedded in the limit groove. There is friction between the inner wall of the slide groove and the skateboard to achieve the positioning of the skateboard. The skateboard is in contact with the inner wall of the limit groove to limit the rotation of the counterweight block, thereby achieving the purpose of positioning the counterweight block. In addition, during the high-speed rotation of the outer ring, the centrifugal force further causes the skateboard to have a tendency to move closer to the counterweight block, making the connection between the skateboard and the limit groove tighter, further making the counterweight block less likely to rotate.

[0011] As a preferred solution of the utility model, a plurality of weight-reducing holes are provided on the surface of the inner ring, and the plurality of weight-reducing holes are evenly distributed along the axis of the inner ring.

[0012] To implement the above technical solution, the setting of the weight-reducing holes reduces the mass of the inner ring and reduces energy consumption.

[0013] As a preferred solution of the utility model, a driving hole is opened on the inner wall of the inner ring, and the inner diameter of one end of the driving hole is larger than the inner diameter of the other end.

[0014] To implement the above technical solution, the drive shaft is inserted into the drive hole, and the drive shaft is fixedly connected to the inner ring through the action of friction, eliminating the need for a keyway, so that the dynamic balance of the pulley is better, thereby being able to adapt to high-speed, high-torque rotation.

[0015] As a preferred solution of the utility model, a plurality of static balance holes are opened on the surface of the outer ring, and the distance between adjacent static balance holes is 3.3-5 mm.

[0016] To implement the above technical solution, the static balancing hole is set to improve the mass distribution of the pulley and reduce the unbalanced force generated during rotation, thereby reducing vibration and noise, improving transmission efficiency and extending equipment life.

[0017] As a preferred solution of the present utility model, the thickness of the blade is 3-5 mm.

[0018] The above technical solution is implemented to reduce the overall mass of the pulley and at the same time, the outer ring has sufficient supporting force.

[0019] The utility model also provides an air compressor, including a drive shaft and a high-torque pulley structure, wherein the end of the drive shaft is provided with a positioning bevel, the positioning bevel is embedded in a drive hole, and a mounting groove is provided on the drive shaft, a friction block is fixedly connected in the mounting groove, and the friction block is tightly pressed against the inner wall of the drive hole.

[0020] To implement the above technical solution, the drive shaft is inserted into the drive hole so that the positioning bevel corresponds to the inner wall of the drive hole, and the friction block is pressed against the inner wall of the drive hole, which further increases the friction force and makes the connection between the drive shaft and the inner ring more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0022] Figure 2 A cross-sectional schematic diagram showing the inner ring;

[0023] Figure 3 It is a schematic diagram showing the structure of the static balance hole;

[0024] Figure 4 To show the structural diagram of the support;

[0025] Figure 5 It is a schematic diagram showing the structure of the drive shaft.

[0026] Figure numerals: 11, outer ring; 12, inner ring; 13, blade; 21, trapezoidal groove; 22, static balance hole; 23, weight reduction hole; 41, support; 42, guide rod; 43, counterweight block; 5, positioning mechanism; 51, threaded groove; 52, threaded sleeve; 6, limit assembly; 61, slide groove; 62, slide plate; 63, limit groove; 71, drive hole; 72, drive shaft; 73, positioning ramp; 74, mounting groove; 75, friction block. DETAILED DESCRIPTION

[0027] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0028] Embodiment 1: A high torque pulley structure comprises an outer ring 11, an inner ring 12 and blades 13. The inner ring 12 and the outer ring 11 are coaxially arranged, and a trapezoidal groove 21 is provided on the outer circumferential surface of the outer ring 11.

[0029] Nine blades 13 are evenly distributed along the axis of the inner ring 12. One end of the blade 13 is fixedly connected to the inner wall of the outer ring 11, and the other end is fixedly connected to the outer wall of the inner ring 12. The thickness of the blade 13 is 3mm. A plurality of static balance holes 22 are opened on the surface of the outer ring 11, and the axis of the static balance holes 22 is arranged parallel to the axis of the outer ring 11. The distance between two adjacent static balance holes 22 is 3.3mm, and the diameter of the static balance holes 22 is 3.5mm.

[0030] Three weight-reducing holes 23 are formed on the surface of the inner ring 12, and the three weight-reducing holes 23 are evenly distributed along the axis of the inner ring 12. The cross section of the weight-reducing holes 23 is fan-shaped.

[0031] A plurality of guide rods 42 are fixedly connected to the inner wall of the outer ring 11, and the plurality of guide rods 42 are evenly distributed along the axis of the outer ring 11. A support 41 is fixedly connected to the inner wall of the outer ring 11, and the two ends of the guide rod 42 are respectively fixedly connected to the two supports 41, so that the length direction of the guide rod 42 is arranged along the axial direction of the inner ring 12. The counterweight 43 is connected to the guide rod 42 through the positioning mechanism 5.

[0032] The positioning mechanism 5 includes a thread groove 51, a thread sleeve 52, and a limit assembly 6. The thread groove 51 is provided on the guide rod 42, and the thread groove 51 is arranged along the length direction of the guide rod 42. The thread sleeve 52 is fixed to the inner wall of the counterweight 43 and is threadedly connected to the thread groove 51. When the counterweight 43 rotates, the counterweight 43 can be moved along the length direction of the guide rod 42, thereby adjusting the linear distance between the counterweight 43 and the inner ring 12. A limit assembly 6 for limiting the rotation of the counterweight 43 is provided on the support 41.

[0033] The limiting assembly 6 includes a slide groove 61, a slide plate 62, and a limiting groove 63. A plurality of limiting grooves 63 are formed on the outer wall of the counterweight 43 and are evenly distributed along the axis of the threaded sleeve 52. The limiting grooves 63 can also play an anti-slip role, making the counterweight 43 more convenient to rotate.

[0034] The slide groove 61 is opened on the support 41 and arranged along the radial direction of the outer ring 11 . Both ends of the slide plate 62 are slidably connected in the slide groove 61 , and the middle part of the slide plate 62 is embedded in the limiting groove 63 .

[0035] A coaxially arranged driving hole 71 is provided on the inner wall of the inner ring 12 . The inner diameter of one end of the driving hole 71 is larger than the inner diameter of the other end, so that the cross section of the driving hole 71 is an isosceles trapezoid.

[0036] Embodiment 2: An air compressor comprises a drive shaft 72 and a high torque pulley structure in Embodiment 1. A positioning bevel 73 is provided at the end of the drive shaft 72, and the positioning bevel 73 is embedded in the drive hole 71, and the positioning bevel 73 is in contact with the inner wall of the drive hole 71. A mounting groove 74 is provided on the drive shaft 72, and two mounting grooves 74 are evenly distributed along the axis of the drive shaft 72. A friction block 75 made of rubber is fixedly connected in the mounting groove 74, and the friction block 75 is pressed against the inner wall of the drive hole 71 to make the connection between the drive shaft 72 and the inner wall of the drive hole 71 tighter.

[0037] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A high torque pulley structure, comprising an outer ring (11), an inner ring (12) and blades (13), wherein the inner ring (12) and the outer ring (11) are coaxially arranged, a plurality of blades (13) are evenly distributed along the axis of the inner ring (12), one end of the blade (13) is fixedly connected to the inner wall of the outer ring (11), and the other end is fixedly connected to the outer wall of the inner ring (12), wherein: A plurality of guide rods (42) are fixedly connected to the inner wall of the outer ring (11); the plurality of guide rods (42) are evenly distributed along the axis of the outer ring (11); the length direction of the guide rods (42) is arranged along the axial direction of the inner ring (12); a counterweight block (43) is connected to the guide rod (42); and the counterweight block (43) is connected to the guide rod (42) via a positioning mechanism (5).

2. A high torque pulley structure according to claim 1, characterized in that: The positioning mechanism (5) comprises a threaded groove (51), a threaded sleeve (52), and a limit assembly (6); the outer ring (11) is fixedly connected to a support (41); both ends of the guide rod (42) are respectively fixedly connected to the support (41); the threaded groove (51) is provided on the guide rod (42); the threaded sleeve (52) is fixed to the inner wall of the counterweight (43) and is threadedly connected to the threaded groove (51); and the support (41) is provided with a limit assembly (6) for limiting the rotation of the counterweight (43).

3. A high torque pulley structure according to claim 2, characterized in that: The limiting assembly (6) includes a slide groove (61), a slide plate (62), and a limiting groove (63). A plurality of the limiting grooves (63) are provided on the outer wall of the counterweight block (43) and are evenly distributed along the axis of the threaded sleeve (52). The slide groove (61) is provided on the support (41) and is arranged along the radial direction of the outer ring (11). Both ends of the slide plate (62) are slidably connected to the slide groove (61), and the middle part of the slide plate (62) is embedded in the limiting groove (63).

4. A high torque pulley structure according to claim 1, characterized in that: A plurality of weight-reducing holes (23) are provided on the surface of the inner ring (12), and the plurality of weight-reducing holes (23) are evenly distributed along the axis of the inner ring (12).

5. A high torque pulley structure according to claim 4, characterized in that: A driving hole (71) is provided on the inner wall of the inner ring (12), and the inner diameter of one end of the driving hole (71) is larger than the inner diameter of the other end.

6. A high torque pulley structure according to claim 5, characterized in that: A plurality of static balance holes (22) are provided on the surface of the outer ring (11), and the distance between adjacent static balance holes (22) is within a range of 3.3-5 mm.

7. A high torque pulley structure according to claim 6, characterized in that: The thickness of the blade (13) is 3-5 mm.

8. An air compressor, characterized in that: It comprises a driving shaft (72) and a high torque pulley structure as claimed in claim 7, wherein a positioning bevel (73) is provided at the end of the driving shaft (72), and the positioning bevel (73) is embedded in the driving hole (71), and a mounting groove (74) is provided on the driving shaft (72), and a friction block (75) is fixedly connected in the mounting groove (74), and the friction block (75) is tightly pressed against the inner wall of the driving hole (71).

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