Electromagnetic clutch for compressors

Abstract

The utility model relates to a compressor equipment technical field discloses a kind of electromagnetic clutch for compressor, including sucking disc, the lower surface of sucking disc is provided with spline board by inside rivet, the upper surface of sucking disc is connected with multiple spring leaf by multiple outside rivet, multiple spring leaf is M-shaped structure design, the middle part of sucking disc is through positioning hole, compressor is connected with spline hole of spline board by passing positioning hole, the upper surface of sucking disc annular array is embedded with multiple sound-absorbing plugs, the upper surface of sucking disc is provided with annular hole, the utility model is through M-shaped spring leaf design, while reducing material consumption, reduce cost, improve bending resistance and buffering noise reduction effect;Collaboration annular hole realizes heat dissipation weight reduction, sound-absorbing plug auxiliary noise reduction, optimization operating stability;Spline board spline hole is designed according to standard to guarantee fitting accuracy, overall structure gives consideration to low cost, high stability, low noise and long life, effectively balance the comprehensive performance and economy of compressor electromagnetic clutch.

Description

Technical Field

[0001] This utility model relates to the field of compressor equipment technology, specifically to an electromagnetic clutch for a compressor. Background Technology

[0002] During the operation of compressor equipment, the electromagnetic clutch, as the core component for power transmission and disconnection, directly affects the overall working efficiency, user experience, and market competitiveness of the compressor due to its performance stability, operating noise control, and manufacturing cost balance.

[0003] Existing electromagnetic clutches for compressors fall into two categories. One type uses a strip-shaped spring structure, which can ensure the stability of basic torque transmission. However, the deformation characteristics of the metal springs in the strip structure design are prone to vibration and resonance, resulting in significant operating noise. Furthermore, the structure limits it to only support unidirectional rotation, making it unsuitable for bidirectional power transmission requirements under various operating conditions. The other type uses a rubber composite structure, which can optimize vibration and noise reduction through the elastic deformation of the rubber and is compatible with bidirectional rotation. However, it relies on oil-resistant and high-temperature-resistant special rubber raw materials. Moreover, the rubber formulation development, vulcanization molding, and composite process with the metal skeleton are highly complex, directly increasing manufacturing costs and making it difficult to meet the market's core demand for product cost-effectiveness.

[0004] To this end, the applicant proposes an electromagnetic clutch for compressors that aims to find the optimal balance between the manufacturing cost of the clutch and its overall performance (including noise reduction, steering compatibility, and torque stability), providing a power control solution for compressor equipment that is both economical and reliable. Utility Model Content

[0005] The purpose of this utility model is to provide an electromagnetic clutch for compressors, solving the following technical problems: Existing electromagnetic clutches for compressors are of two types. One type uses a strip-shaped spring structure, which can ensure the stability of basic torque transmission, but the deformation characteristics of the metal spring in the strip structure design are prone to vibration and resonance, resulting in significant operating noise. Moreover, the structure limits it to only support unidirectional rotation, making it unsuitable for bidirectional power transmission requirements under multiple working conditions. The other type uses a rubber composite structure, which can optimize vibration and noise reduction through rubber elastic deformation and is compatible with bidirectional rotation, but it relies on oil-resistant and high-temperature resistant special rubber raw materials. Furthermore, the rubber formulation development, vulcanization molding, and composite process with the metal skeleton are highly complex, directly increasing manufacturing costs and making it difficult to meet the market's core demand for product cost-effectiveness.

[0006] The objective of this utility model can be achieved through the following technical solutions: An electromagnetic clutch for a compressor includes a suction cup, the lower surface of which is provided with a keypad via internal rivets, and the upper surface of which is connected to multiple springs via multiple external rivets, the multiple springs being designed in an M-shape. The suction cup has a through-hole in the middle, and the compressor shaft passes through the through-hole and connects to the spline hole of the keyboard.

[0007] As a further embodiment of this utility model: the suction cup has a plurality of through holes arranged in a ring array, and the inner rivets are inserted into the through holes and the corresponding holes of the keyboard to fix the suction cup to the keyboard.

[0008] As a further embodiment of this invention, the upper surface of the suction cup is fitted with a ring array of multiple mufflers.

[0009] As a further embodiment of this utility model, the upper surface of the suction cup is provided with an annular hole.

[0010] As a further embodiment of this utility model: except for the suction surface of the suction cup and the spline hole of the keyboard, the remaining outer surfaces of the suction cup, keyboard and spring are all coated with electrophoretic paint, and the coating color is black and the thickness is 0.02±0.005mm.

[0011] As a further embodiment of this utility model: the nominal diameter of the spline hole is 13.5mm, the number of teeth is 25, the module is 0.5, the pressure angle of the spline hole is 20°, the tooth profile is an involute short tooth outer diameter fit type, the displacement coefficient is 0.8, the inner hole size is 12.5mm, and the common normal length of the four teeth is 5.6mm.

[0012] As a further embodiment of this utility model: one end of the spring is connected to the edge of the suction cup by an external rivet, and the other end is in a free state and naturally fits against the side of the suction cup, forming an elastic structure with one end fixed and the other end movable.

[0013] As a further embodiment of this utility model: the centers of the suction cup, the keypad, and the multiple springs are located on the same vertical line.

[0014] The beneficial effects of this utility model are: (1) This utility model uses an M-shaped spring design to achieve uniform deformation by using multiple protrusions and an arc transition to disperse stress concentration. This not only greatly reduces the vibration and resonance noise of the compressor during high-frequency operation, but also breaks through the unidirectional rotation limitation of the strip spring and is compatible with bidirectional power transmission under multiple working conditions. At the same time, it is equipped with a nitrile rubber muffler to assist in noise reduction. Under the synergistic effect of the dual structure, it effectively solves the technical pain points of traditional strip springs, such as high noise, poor steering adaptability, and the reliance on special materials for rubber composite structures. This allows the clutch to maintain low noise and high stability in complex operating environments and has comprehensive performance characteristics such as low noise, low cost and high strength. (2) This utility model reduces the amount of unnecessary materials and directly reduces raw material costs by using the partial hollow structure of the M-shaped spring to ensure bending resistance. The suction cup ring hole design forms an air heat dissipation channel and avoids high temperature deformation. At the same time, it removes materials in non-stressed areas to reduce weight and reduce compressor shaft load and rotational inertia. Moreover, the whole uses conventional metal substrates combined with mature processes such as electrophoretic coating and white zinc / Dacromet coating. It does not need to rely on high-cost special rubber and complex vulcanization composite processes. On the basis of ensuring high-precision fit of spline holes and rust prevention and durability of parts, it achieves the optimal balance between manufacturing cost and product life, and meets the core demand of the market for high-performance clutches.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the overall structure of an existing bar-type reed clutch; Figure 5 This is a schematic diagram of an existing rubber-structured clutch.

[0018] In the diagram: 100, suction cup; 101, positioning hole; 102, annular hole; 200, keypad; 300, inner rivet; 400, outer rivet; 500, spring; 600, muffler. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] In the field of compressor equipment technology, traditional electromagnetic clutches for compressors, when using a strip-spring structure, offer certain advantages in torque transmission stability. However, due to the physical characteristics of the rigid deformation of the metal spring, they are prone to generating significant noise during operation due to vibration and resonance. Furthermore, their structural design limits them to unidirectional rotation, making them unsuitable for bidirectional power transmission requirements under various operating conditions. While rubber-structured electromagnetic clutches can optimize vibration and noise reduction through the elastic deformation of rubber and are compatible with bidirectional rotation scenarios, they require the use of oil-resistant and high-temperature-resistant special rubber materials. The complex rubber formulation development, vulcanization molding, and composite processes with the metal skeleton significantly increase overall production costs, making it difficult to meet customers' actual demands for product cost-effectiveness. Therefore, this utility model proposes an electromagnetic clutch for compressors that, through innovative structural design, aims to find the optimal balance between manufacturing costs and overall performance (including noise reduction, steering compatibility, and torque stability), providing a power control solution for compressor equipment that is both economical and reliable.

[0022] Example 1: Please refer to Figure 1 - Figure 3 As shown, an electromagnetic clutch for a compressor includes a suction cup 100. A keypad 200 is provided on the lower surface of the suction cup 100. Multiple through holes are arranged in a circular array on the suction cup 100. The keypad 200 has internal teeth at its center. An internal rivet 300 is provided in the through hole on the surface of the suction cup 100. The internal rivet 300 passes through one side of the suction cup 100 and through the corresponding hole of the keypad 200, thus fixing the two together. After the suction cup 100 and the keypad 200 are fixed by the internal rivet 300, when the keypad 200 rotates with the compressor shaft, it can directly drive the suction cup 100 to rotate synchronously through the internal rivet 300 without relative slippage.

[0023] In this embodiment, the inner rivet 300 is treated with white zinc plating, which forms a zinc layer on the surface of the inner rivet 300 to protect the internal iron substrate from rusting, thereby improving the rust resistance of the inner rivet 300 and preventing it from rusting and seizing due to moisture or contact with oil during long-term use.

[0024] For further details, please refer to Figure 2 , Figure 4 , Figure 5 As shown, the upper surface of the suction cup 100 is connected to multiple spring sheets 500 by multiple external rivets 400. The edge of the suction cup 100 is provided with rivet holes, and one end of the spring sheet 500 is also provided with matching holes. The external rivets 400 pass through these two holes, and the other end of the spring sheet 500 is not fixed, but naturally fits against the side of the suction cup 100, forming an elastic structure with one end fixed and the other end movable.

[0025] In this embodiment, compared to the prior art, Figure 4 and Figure 5 The main improvement lies in the design of the spring 500, which features an M-shaped structure. Structurally, the partially hollowed-out M-shape reduces unnecessary material usage within the same installation dimensions, saving costs and reducing the weight of the spring 500 itself. This allows for a faster elastic deformation response, meeting the requirements of rapid clutch engagement and disengagement. From a performance perspective, the raised M-shape increases the moment of inertia of the cross-section, significantly improving bending resistance. Simultaneously, the arc-shaped transition disperses stress concentration, preventing cracking after prolonged vibration and impact, and extending fatigue life. Furthermore, the multiple raised M-shapes ensure uniform deformation, preventing excessive local deformation and ensuring stable buffering in the continuous vibration environment of the compressor. This effectively reduces impact noise between the keypad 200 and the suction cup 100, balancing the comprehensive requirements of lightweight, high strength, and noise reduction. The external rivet 400 is used to connect the spring 500. Its rust resistance directly affects the stability of its fit with the spring 500, so it is treated with Dacromet coating. The zinc-chromium coating formed by this treatment is mostly silver-gray in appearance. Compared with white zinc plating, it not only has better resistance to salt spray and damp heat, but also avoids the risk of hydrogen embrittlement of the coating, preventing the rivet from becoming brittle and breaking under stress, and ensuring the long-term reliability of the connection structure.

[0026] For further details, please refer to Figure 1 As shown, a positioning hole 101 is provided through the middle of the suction cup 100. The compressor shaft needs to pass through the positioning hole 101 in the middle of the suction cup 100 and engage with the spline hole of the keypad 200. The diameter of the positioning hole 101 in the middle is slightly larger than the diameter of the compressor shaft to ensure that the shaft can pass through smoothly without friction, and at the same time to provide radial positioning for the suction cup 100 to prevent it from shifting during rotation.

[0027] For further details, please refer to Figure 1As shown, an annular hole 102 is formed on the upper surface of the suction cup 100. During operation, the suction cup 100 generates heat due to the instantaneous impact, friction, and high-speed rotation. The annular hole 102 forms an airflow channel, allowing air to circulate within the hole and quickly dissipate heat, preventing deformation of the suction cup 100 or affecting its electromagnetic performance due to excessive temperature. Simultaneously, while maintaining the overall strength of the suction cup 100, the annular hole 102 removes material from non-load-bearing areas, reducing the overall weight of the suction cup 100. This not only reduces the load on the compressor shaft but also reduces rotational inertia, improving the clutch response speed.

[0028] Multiple muffler plugs 600 are embedded in a ring array on the upper surface of the suction cup 100. The muffler plugs 600 are made of nitrile rubber, which can effectively fill the process holes on the surface of the suction cup 100, and at the same time, the damping characteristics of the rubber help to reduce operating noise.

[0029] Furthermore, the centers of the suction cup 100, the keypad 200, and the multiple reeds 500 are on the same vertical line.

[0030] Example 2: Based on Example 1, please refer to... Figure 1 - Figure 3 As shown, except for the suction surface and the spline hole where the keypad 200 mates with the compressor shaft, all other outer surfaces of this utility model are coated with electrophoretic paint. The coating color is black, and the thickness is controlled at 0.02±0.005mm. The paint film formed by this process has strong adhesion and uniform coverage. It can effectively isolate corrosive media such as moisture and oil, extend the service life of the suction cup 100, and unify the product appearance, meeting the design requirements of the whole machine.

[0031] For further details, please refer to Figure 1 As shown, the spline hole specifications conform to the JISD2001 standard. The specific parameters are: nominal diameter 13.5mm, number of teeth 25, module 0.5, corresponding to the specification marking 13.5x25x0.5; pressure angle 20°, tooth profile is involute short tooth outer diameter fit type, displacement coefficient 0.8, inner hole size 12.5mm, and four-tooth common normal length 5.6mm.

[0032] Example 3: Based on Examples 1 and 2, the working principle of this utility model is as follows: When an electromagnetic clutch for a compressor is in use, the compressor shaft passes through the positioning hole 101 of the suction cup 100 and engages with the spline hole of the keypad 200, driving the keypad 200 to rotate. Then, the suction cup 100 is driven to rotate synchronously through the inner rivet 300, realizing the power transmission without slippage. The M-shaped spring 500 on the suction cup 100 (with the outer rivet 400 treated with Dacromet to prevent brittle fracture) buffers the impact and weakens the resonance noise with an elastic structure, and is used in conjunction with the nitrile rubber muffler plug 600 to assist in noise reduction. The annular hole 102 dissipates heat and reduces weight, and the non-critical surfaces of the clutch are electrophoretically coated with paint to isolate corrosion, thereby achieving the synergistic effect of stable power transmission, low noise, and long service life.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An electromagnetic clutch for a compressor, characterized in that, Includes a suction cup (100), the lower surface of which is provided with a keypad (200) by an inner rivet (300), and the upper surface of which is connected to a plurality of springs (500) by a plurality of outer rivets (400), the plurality of springs (500) being designed in an M-shape; The suction cup (100) has a through-hole (101) in the middle, and the compressor shaft passes through the through-hole (101) and connects to the spline hole of the keyboard (200).

2. The electromagnetic clutch for a compressor according to claim 1, characterized in that, The suction cup (100) has multiple through holes arranged in a ring array. The inner rivet (300) passes through the through holes and the corresponding holes of the keyboard (200) to fix the suction cup (100) and the keyboard (200).

3. The electromagnetic clutch for a compressor according to claim 1, characterized in that, The upper surface of the suction cup (100) is fitted with a ring array of multiple mufflers (600).

4. An electromagnetic clutch for a compressor according to claim 1, characterized in that, The upper surface of the suction cup (100) is provided with an annular hole (102).

5. An electromagnetic clutch for a compressor according to claim 1, characterized in that, Except for the suction surface of the suction cup (100) and the spline hole of the keyboard (200), the remaining outer surfaces of the suction cup (100), keyboard (200) and spring (500) are all coated with electrophoretic paint, and the coating color is black and the thickness is 0.02±0.005mm.

6. An electromagnetic clutch for a compressor according to claim 1, characterized in that, The nominal diameter of the spline hole is 13.5 mm, the number of teeth is 25, the module is 0.5, the pressure angle of the spline hole is 20°, the tooth profile is an involute short tooth outer diameter fit type, the displacement coefficient is 0.8, the inner hole size is 12.5 mm, and the common normal length of the four teeth is 5.6 mm.

7. An electromagnetic clutch for a compressor according to claim 1, characterized in that, One end of the spring (500) is connected to the edge of the suction cup (100) by an external rivet (400), and the other end is in a free state and naturally fits the side of the suction cup (100), forming an elastic structure with one end fixed and the other end movable.

8. An electromagnetic clutch for a compressor according to claim 1, characterized in that, The centers of the suction cup (100), the keypad (200), and the multiple reeds (500) are on the same vertical line.

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