Belt tensioning mechanism and air conditioner compressor with same

Abstract

The utility model discloses a belt tensioning mechanism and an air conditioner compressor with the same. The belt tensioning mechanism comprises a rocker arm and a sliding block installed on the rocker arm. The rocker arm is sleeved with the sliding block, a worm is arranged in the sliding block, spiral teeth are arranged on the worm, and a rack meshed with the spiral teeth is arranged on the rocker arm. The worm with the spiral teeth is matched with the rack on the rocker arm, so that the rocker arm can move in the sliding block to drive an air conditioner compressor to rotate and a belt to be tensioned; the rocker arm and the sliding block can be effectively prevented from sliding relative to each other, and instability and risks possibly occurring during locking are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of air-conditioning compressors, and in particular relates to a belt tensioning mechanism and an air-conditioning compressor having the same. Background Art

[0002] The belt tensioning mechanism of the air-conditioning compressor is an important component of the air-conditioning system. Its function is to maintain the proper tension of the belt to ensure the normal operation of the transmission system. However, the existing belt tensioning mechanism has some design problems, which are mainly reflected in the following aspects: First, the existing belt tensioning mechanism can only pull the slider in one direction, but cannot push the slider in the opposite direction. This results in the adjustment of the position of the air-conditioning compressor being only unidirectional, lacking flexibility and comprehensiveness. Secondly, the existing belt tensioning mechanism can only withstand tension but not pressure, that is, it can only lock the slider in one direction, which makes the rocker arm at risk of slipping, affecting the reliability and stability of the belt tensioning mechanism. Finally, the adjustment mechanism (including rocker arm, slider, bolt, etc.) occupies a large space and has certain difficulties in layout. This may limit the use of belt tensioning mechanisms in some space-constrained application scenarios, requiring a more compact and efficient design.

[0003] In summary, the current belt tensioning mechanism of air-conditioning compressors has some design deficiencies, including one-way adjustment, inability to withstand pressure, large space occupation, etc. Therefore, further improvement and innovation of this technology is necessary to improve the performance, stability and applicability of the belt tensioning mechanism, so as to better meet the needs of air-conditioning systems under different working conditions. Utility Model Content

[0004] The utility model aims to provide a belt tensioning mechanism and an air-conditioning compressor having the same, so as to solve the technical problem of locking instability of the existing belt tensioning mechanism.

[0005] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0006] A belt tensioning mechanism, comprising a rocker arm and a slider mounted on the rocker arm;

[0007] The sliding block is sleeved on the rocker arm, a worm is arranged in the sliding block, the worm is provided with helical teeth, and the rocker arm is provided with a rack meshing with the helical teeth.

[0008] Therefore, the slider of the utility model adopts a through-type structure and is sleeved on the rocker arm. The inner cavity of the slider is provided with a worm with helical teeth, and the helical teeth can mesh with the rack on the rocker arm. Only by rotating the worm can the slider be driven to move on the rocker arm, which can effectively prevent the rocker arm and the slider from sliding against each other, avoiding the instability and risks that may occur when locking. Secondly, the worm and the rack structure on the rocker arm have the characteristics of a large transmission ratio, which can realize high torque transmission and low-speed movement, which is conducive to fine-tuning operation. In addition, the transmission method of the worm and the rack structure on the rocker arm is sliding friction, and the tooth surface meshing area is larger, which is more stable, reliable, and quieter.

[0009] Furthermore, the slider is provided with a second mounting hole, the rocker arm includes a vertical portion and a bent portion, the vertical portion is provided with an adjustment hole extending along its length direction, the bent portion is provided with a first mounting hole, and the rack is arranged on the vertical portion.

[0010] Furthermore, a second mounting hole corresponding to the adjustment hole is opened on the slider, and the first fastener passes through the adjustment hole and the second mounting hole to fix the slider to the rocker arm.

[0011] Furthermore, a third mounting hole is provided on the slider, and the second fastener passes through the third mounting hole and abuts against the side surface of the rocker arm. The second fastener abuts against the side surface of the rocker arm to eliminate the gap between the rack and the worm, protect the toothed structure from damage under vibration and impact, and further lock the position of the rocker arm.

[0012] Furthermore, the rack is arranged on a side away from the side surface.

[0013] Furthermore, a limit block for limiting the axial movement of the worm is provided on the inner wall of the slider to prevent the worm from escaping from the slider.

[0014] Furthermore, two ends of the worm are provided with hexagonal holes.

[0015] Based on the same design concept, the utility model also provides an air-conditioning compressor, which includes a compressor body mounted on a bracket, and a belt tensioning mechanism as described above is connected between the bracket and the compressor body, the rocker arm includes a vertical portion and a bent portion, the vertical portion is provided with an adjustment hole extending along its length direction, the bent portion is provided with a first mounting hole, a first fastener passes through a slider and the adjustment hole to fix one end of the rocker arm to the bracket, and a third fastener passes through the first mounting hole to fix the other end of the rocker arm to the compressor body.

[0016] The utility model has the following advantages:

[0017] (1) The worm rack structure of the utility model has the characteristics of a large transmission ratio, which can realize large torque transmission, making operation effortless; it can realize low-speed movement, which is conducive to fine-tuning operation.

[0018] (2) The transmission mode of the worm rack structure of the utility model is sliding friction, the tooth surface meshing area is larger, it is more stable, reliable and quieter.

[0019] (3) The worm rack structure of the utility model has a self-locking function, which effectively prevents the rocker arm from sliding.

[0020] (4) The worm rack structure of the utility model has the characteristics of small size, light weight and compact structure, which is conducive to small space layout.

[0021] (5) The locking screw installed on the slider of the utility model can eliminate the gap between the rack and the worm, protect the toothed structure from damage under vibration and impact, and further lock the position of the rocker arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the air-conditioning compressor of the utility model;

[0023] Figure 2 This is a schematic diagram of the disassembly of the air-conditioning compressor of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the belt tensioning mechanism of the utility model;

[0025] Figure 4 This is a schematic diagram of the disassembly of the belt tensioning mechanism of the utility model;

[0026] Figure 5 It is a cross-sectional view of the belt tensioning mechanism of the utility model;

[0027] Figure 6 It is a cross-sectional view of the slider of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of each component of the belt tensioning mechanism of the utility model;

[0029] Figure 8 This is a schematic diagram of the worm structure of the utility model;

[0030] Fig. 9 It is a schematic diagram of the limit block structure of the utility model.

[0031] Explanation of the markings in the figure: 1. compressor body; 2. belt; 3. pulley; 4. bracket; 5. pin; 6. pin shaft; 7. rocker arm; 71. vertical portion; 72. bending portion; 8. worm; 9. slider; 10. first fastener; 11. nut; 12. bolt; 13. second fastener; 1a. first hinge point; 1b. second hinge point; 1c. third hinge point; 4a. through hole; 4b. threaded hole; 5a. pin shaft through hole; 7a. first mounting hole; 7b. rack; 7c. adjustment hole; 7d. side; 7e. head; 8a. bare rod; 8b. spiral teeth; 8c. hexagonal socket hole; 9a. limit block; 9b. slide groove; 9c. second mounting hole; 9d. third mounting hole. DETAILED DESCRIPTION

[0032] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0033] like Figures 1 to 4 As shown, an air-conditioning compressor of this embodiment includes a compressor body 1 mounted on a bracket 4, and a belt tensioning mechanism connecting the bracket 4 and the compressor body 1, the belt tensioning mechanism includes a rocker arm 7 and a slider 9 mounted on the rocker arm 7, the slider 9 is sleeved on the rocker arm 7, and a worm 8 is arranged inside the slider 9. Fig. 9 As shown, a limit block 9a is provided on the inner wall of the slide block 9 for limiting the axial movement of the worm 8. Figure 8 As shown, the worm 8 is provided with a helical tooth 8b, and two ends of the worm 8 are provided with a hexagonal hole 8c. The rocker arm 7 is provided with a rack 7b meshing with the helical tooth 8b. Specifically, as Figure 7 As shown, the rocker arm 7 includes a vertical portion 71 and a bent portion 72 , the vertical portion 71 is provided with an adjustment hole 7c extending along its length direction, the bent portion 72 is provided with a first mounting hole 7a , and the rack 7b is arranged on the vertical portion 71 .

[0034] like Figures 5 to 7 As shown, the slider 9 is provided with a second mounting hole 9c corresponding to the adjustment hole 7c, and the first fastener 10 passes through the adjustment hole 7c and the second mounting hole 9c to fix the slider 9 and the rocker arm 7 on the bracket 4. Preferably, the first fastener 10 is a bolt.

[0035] The slider 9 is provided with a third mounting hole 9d, and the second fastener 13 passes through the third mounting hole 9d and abuts against the side surface 7d of the rocker arm 7. Preferably, the second fastener 13 is a bolt. The rack 7b is arranged on a side away from the side surface 7d.

[0036] The working principle of the utility model is as follows:

[0037] 1. Align the first hinge point 1a and the second hinge point 1b of the air-conditioning compressor with the center line of the through hole 4a of the bracket. The pin 5 passes through the first hinge point 1a, the through hole 4a, and the second hinge point 1b in sequence. The pin 6 passes through the through hole 5a of the pin and is bent and locked.

[0038] 2. Insert the smooth rods 8a at both ends of the worm into the limit blocks 9a of the slider 9 respectively, and extend the head 7e of the rocker arm 7 into the inner cavity 9b of the slider, so that the rack 7b engages with the spiral teeth 8b of the worm; insert the wrench into the hexagonal hole 8c, rotate the worm 8, and make the rocker arm 7 gradually go deeper into the slider 9 until the tail section of the rack 7b enters the slide groove 9b.

[0039] 3. The third fastener 12 passes through the first mounting hole 7a of the rocker arm 7 and the third hinge point 1c of the air-conditioning compressor in turn, and the nut 11 is connected but not tightened to ensure that the rocker arm 7 can rotate normally around the third fastener 12.

[0040] 4. The first fastener 10 passes through the second mounting hole 9c of the slider and the adjustment hole 7c of the rocker arm in turn, and is screwed into the threaded hole 4b of the bracket but not tightened to ensure that the slider 9 is in a loose state.

[0041] 5. Install the belt 2 and rotate the worm 8 to make the slider 9 gradually approach the head 7e of the rocker arm, drive the air-conditioning compressor 1 to rotate around the pin 5, thereby driving the belt 2 to be tightened until the tension is appropriate.

[0042] 6. Tighten the first fastener 10 and the third fastener 12 respectively, and screw the two second fasteners 13 into the third mounting hole 9d of the slider and contact the side surface 7d of the rocker arm until they are tightened. Preferably, the third fastener 12 is a bolt.

[0043] In this embodiment, a worm with helical teeth cooperates with a rack on the rocker arm, so that the rocker arm can move in the slider, drive the rotation of the air-conditioning compressor and tighten the belt; it can effectively prevent the rocker arm and the slider from sliding against each other, avoiding instability and risks that may occur during locking.

[0044] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A belt tensioning mechanism, comprising a rocker arm (7) and a slider (9) mounted on the rocker arm (7); characterized in that: The slider (9) is sleeved on the rocker arm (7), a worm (8) is provided inside the slider (9), the worm (8) is provided with helical teeth (8b), and the rocker arm (7) is provided with a rack (7b) meshing with the helical teeth (8b).

2. The belt tensioning mechanism according to claim 1, characterized in that: The rocker arm (7) comprises a vertical portion (71) and a bent portion (72); the vertical portion (71) is provided with an adjustment hole (7c) extending along its length direction; the bent portion (72) is provided with a first mounting hole (7a); and the rack (7b) is arranged on the vertical portion (71).

3. The belt tensioning mechanism according to claim 2, characterized in that: The slider (9) is provided with a second mounting hole (9c) corresponding to the adjustment hole (7c), and the first fastener (10) passes through the adjustment hole (7c) and the second mounting hole (9c) to fix the slider (9) to the rocker arm (7).

4. The belt tensioning mechanism according to claim 1, characterized in that: The slider (9) is provided with a third mounting hole (9d), and the second fastener (13) passes through the third mounting hole (9d) and abuts against the side surface (7d) of the rocker arm (7).

5. The belt tensioning mechanism according to claim 4, characterized in that: The rack (7b) is arranged on a side facing away from the side surface (7d).

6. The belt tensioning mechanism according to claim 1, characterized in that: A limit block (9a) for limiting the axial movement of the worm (8) is provided on the inner wall of the sliding block (9).

7. The belt tensioning mechanism according to claim 1, characterized in that: Both ends of the worm (8) are provided with hexagonal holes (8c).

8. An air-conditioning compressor, comprising a compressor body (1) mounted on a bracket (4), characterized in that: A belt tensioning mechanism as described in any one of claims 1 to 7 is connected between the bracket (4) and the compressor body (1); the rocker arm (7) comprises a vertical portion (71) and a bent portion (72); the vertical portion (71) is provided with an adjustment hole (7c) extending along its length direction; the bent portion (72) is provided with a first mounting hole (7a); a first fastener (10) passes through a slider (9) and the adjustment hole (7c) to fix one end of the rocker arm (7) to the bracket (4); and a third fastener (12) passes through the first mounting hole (7a) to fix the other end of the rocker arm (7) to the compressor body (1).

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