Compressor with transmission and cylinder cover structure thereof

Abstract

The utility model relates to the technical field of compressors, in particular to a cylinder cover structure of a compressor with a transmission and the compressor which comprises the cylinder cover structure and is provided with the transmission. The cylinder cover structure comprises a cylinder cover body and a support portion, one side of the cylinder cover body is used for being connected with and sealing one end, close to a transmission, of an air cylinder of a pump body, the support portion is fixedly arranged on the other side of the cylinder cover body and used for being connected with the transmission, an inner hole penetrating in the axial direction is formed in the cylinder cover body, and a crankshaft penetrates through the inner hole. The transmission is fixed through the support part on the cylinder cover structure, and the transmission is directly fixed on the support part of the cylinder cover structure, so that the assembly coaxiality of the transmission additionally arranged in the compressor can be effectively improved, the number of parts in the compressor and the assembly cost are reduced, and the overall axial length of the compressor can be effectively reduced; the overall axial stability of the compressor is guaranteed, and the vibration noise and the lubricating state of the compressor are improved.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a cylinder head structure for a compressor with a gearbox and a compressor with a gearbox including the cylinder head structure. Background Technology

[0002] Conventional rolling rotor compressors operate synchronously with a pump driven by a motor. To fully utilize the high efficiency of the motor at high speeds and the high efficiency of the pump at low speeds, a gearbox is added between the motor and pump within the compressor to achieve asynchronous operation, thereby improving the overall efficiency of the compressor. To achieve torque transmission from the motor to the pump, the connection and fixing method of the gearbox, as a new independent component, with its internal components is crucial. For better gearbox fixation, a connecting structure needs to be installed inside the compressor to support it. Welding this connection structure to the compressor housing may make coaxial assembly of rotating components such as the crankshaft on the pump side and the power shaft on the motor side difficult, while also increasing compressor cost and the number of parts, increasing the overall axial length of the compressor, which is detrimental to the overall axial stability, vibration noise, and lubrication of the compressor. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a cylinder head structure for a compressor with a transmission, which can fix the transmission and improve the assembly coaxiality of the transmission added in the compressor and the overall axial stability of the compressor.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model provides a cylinder head structure for a compressor with a gearbox. The input end and output end of the gearbox are respectively connected to the power shaft on the motor side and the crankshaft on the pump body side of the compressor. The cylinder head structure includes a cylinder head body and a support part. One side of the cylinder head body is used to connect and seal the end of the pump body cylinder near the gearbox. The support part is fixed on the other side of the cylinder head body and is used to connect the gearbox. The cylinder head body is provided with an axially penetrating inner hole for the crankshaft to pass through.

[0006] Preferably, a journal extends from the side of the cylinder head body away from the cylinder, an inner hole passes through the journal axially, and a support portion is provided on the outer peripheral surface of the end of the journal away from the cylinder head body.

[0007] Preferably, the bracket portion is interference-fitted with the journal.

[0008] Preferably, the bracket is welded to the cylinder head body.

[0009] Preferably, the bracket and the cylinder head body are designed as a single integral component.

[0010] Preferably, the inner hole wall is provided with an oil groove.

[0011] Preferably, the bracket portion is used to connect the transmission housing of the transmission.

[0012] This utility model also provides a compressor with a transmission, including the cylinder head structure of the compressor with a transmission as described above.

[0013] Preferably, it also includes a motor, a pump body, a power shaft driven by the motor, a crankshaft passing through a cylinder in the pump body, and a transmission connecting the power shaft and the crankshaft. The cylinder head body connects to and seals the end of the cylinder near the transmission. The transmission is connected to the bracket part through the transmission housing. The crankshaft passes through the inner hole and is connected to the output end of the transmission.

[0014] Preferably, the transmission housing and the bracket are connected by bolts.

[0015] Compared with the prior art, this utility model has significant progress:

[0016] This invention adds a bracket to the cylinder head body, which fixes the transmission to the cylinder head structure. The inner hole in the cylinder head body radially limits the crankshaft passing through it and the output end of the transmission fixedly connected to the crankshaft. This allows the transmission to be directly fixed to the bracket on the cylinder head structure. On one hand, this significantly reduces the difficulty of coaxially assembling the pump-side crankshaft, motor-side power shaft, and transmission of a compressor with a transmission, effectively improving the coaxiality of the transmission assembly within the compressor. On the other hand, it eliminates the need for additional connecting components to fix the transmission, reducing the number of internal compressor parts and assembly costs. It also effectively reduces the overall axial length of the compressor, ensuring overall axial stability and improving compressor vibration, noise, and lubrication. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the connection between the cylinder head structure of the compressor with a gearbox, the gearbox, and the pump body according to an embodiment of this utility model.

[0018] Figure 2 This is a cross-sectional schematic diagram of the connection between the cylinder head structure of the compressor with transmission and the transmission according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of one embodiment of the cylinder head structure of a compressor with a transmission according to this utility model.

[0020] Figure 4 This is a schematic diagram of another embodiment of the cylinder head structure of the compressor with a transmission according to this utility model.

[0021] The reference numerals in the attached figures are explained as follows:

[0022] 1. Cylinder head structure

[0023] 11 Cylinder head body

[0024] 12 Support section

[0025] 13 inner hole

[0026] 14 journals

[0027] 15 Oil tank

[0028] 2. Transmission

[0029] 21. Sun Wheel

[0030] 22 Planetary Wheels

[0031] 23 Planetary Supports

[0032] 24. Transmission housing

[0033] 3. Drive shaft

[0034] 4. Crankshaft

[0035] 5 rotors

[0036] 6 cylinders Detailed Implementation

[0037] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0038] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] like Figures 1 to 4 The image shows an embodiment of the cylinder head structure of a compressor with a transmission provided by this utility model.

[0042] The cylinder head structure 1 of this embodiment is suitable for a compressor with a transmission 2. See also... Figure 1 and Figure 2 In a compressor with a transmission 2, the input and output ends of the transmission 2 are connected to the power shaft 3 on the motor side and the crankshaft 4 on the pump body side, respectively. The power shaft 3 is driven by the rotor 5 of the motor and rotates synchronously with it. The pump body is equipped with a cylinder 6, and the crankshaft 4 passes through the cylinder 6. The input end of the transmission 2 is connected to the power shaft 3 and rotates synchronously to receive the rotational torque from the power shaft 3. The output end of the transmission 2 is connected to the crankshaft 4 and rotates synchronously to output torque to the crankshaft 4, thereby driving the crankshaft 4 to rotate. The input and output ends of the transmission 2 are connected by a speed-changing transmission mechanism, meaning that the output speed of the output end is different from the input speed of the input end. This results in a different speed between the crankshaft 4 on the pump body side and the power shaft 3 on the motor side, enabling asynchronous operation of the compressor motor and pump body.

[0043] See Figure 1 and Figure 2The cylinder head structure 1 of this embodiment includes a cylinder head body 11 and a bracket portion 12. One side of the cylinder head body 11 is used to connect to and seal the end of the pump body cylinder 6 near the transmission 2 to form a sealed pump body structure, that is, the cylinder head body 11 is used to realize the original function of the cylinder head in the compressor. The bracket portion 12 is fixed to the other side of the cylinder head body 11 and is used to connect the transmission 2 to realize the installation and fixation of the transmission 2. Preferably, the bracket portion 12 is used to connect the transmission housing 24 of the transmission 2, that is, the transmission 2 is connected to the bracket portion 12 through the transmission housing 24, so that the transmission 2 is integrally connected and fixed to the bracket portion 12 of the cylinder head structure 1. Preferably, the outer periphery of the bracket portion 12 can also be fixedly connected to the housing of the compressor to increase the stability of the transmission 2 inside the compressor and further ensure the coaxiality of the pump body side crankshaft 4, the motor side power shaft 3 and the transmission 2. Preferably, the transmission housing 24 and the bracket portion 12 are connected and fixed by bolts. The cylinder head body 11 has an axially penetrating inner hole 13 through which the crankshaft 4 passes, allowing the crankshaft 4 to pass through the cylinder head body 11 and connect to the output end of the transmission 2 mounted on the bracket 12. The crankshaft 4 and the inner hole 13 are in a rotational fit.

[0044] Therefore, in this embodiment, the cylinder head structure 1 adds a bracket portion 12 to the cylinder head body 11, which fixes the transmission 2. The inner hole 13 on the cylinder head body 11 radially limits the crankshaft 4 passing through it and the output end of the transmission 2 fixedly connected to the crankshaft 4. This allows the transmission 2 to be directly fixed to the bracket portion 12 of the cylinder head structure 1. On the one hand, this greatly reduces the difficulty of coaxially assembling the pump-side crankshaft 4 and the motor-side power shaft 3 of the compressor with the transmission 2 with the transmission 2, effectively improving the coaxiality of the assembly of the transmission 2 added inside the compressor. On the other hand, it eliminates the need to add additional connecting parts to fix the transmission 2, reducing the number of internal parts and assembly costs of the compressor. It also effectively reduces the overall axial length of the compressor, ensuring the overall axial stability of the compressor and improving the compressor's vibration noise and lubrication.

[0045] In this embodiment, preferably, a journal 14 extends from the side of the cylinder head body 11 away from the cylinder 6, and an inner hole 13 axially penetrates the journal 14. A bracket portion 12 is disposed on the outer peripheral surface of the end of the journal 14 away from the cylinder head body 11. The crankshaft 4 passes through the inner hole 13 through the cylinder head body 11 and the journal 14 and is connected to the output end of the transmission 2. The extended journal 14 can strengthen the support for the crankshaft 4, increase the overall axial stability of the compressor, and also allow the bearing supporting the output end of the transmission 2 inside the transmission 2 to be moved out of the transmission housing 24 and embedded in the inner hole 13 inside the journal 14, thereby further reducing the overall axial length of the compressor.

[0046] See Figure 3In a preferred embodiment, the bracket portion 12 is interference-fitted with the journal 14 on the cylinder head body 11, that is, the bracket portion 12 is sleeved on the outer peripheral surface of the journal 14 at the end away from the cylinder head body 11 and interference-fitted with the journal 14, thereby achieving a fixed connection between the bracket portion 12 and the journal 14 on the cylinder head body 11, which can ensure that the cylinder 6 and crankshaft 4 connected to one side of the cylinder head body 11 and the transmission 2 connected to the bracket portion 12 on the other side of the cylinder head body 11 form good assembly coaxiality.

[0047] See Figure 4 In another preferred embodiment, the bracket portion 12 and the cylinder head body 11 are integrally designed to form an integral cylinder head structure 1 with the bracket portion 12. The integral cylinder head structure 1 simultaneously undertakes the function of connecting the cylinder 6, the crankshaft 4 and the transmission 2, which can ensure that the cylinder 6 and the crankshaft 4 connected on both sides of the cylinder head structure 1 and the transmission 2 form good assembly coaxiality.

[0048] In other preferred embodiments, the bracket portion 12 is welded to the cylinder head body 11, which can also achieve a fixed connection between the bracket portion 12 and the journal 14 on the cylinder head body 11, ensuring that the cylinder 6 and crankshaft 4 connected to one side of the cylinder head body 11 and the transmission 2 connected to the bracket portion 12 on the other side of the cylinder head body 11 form a good assembly coaxiality.

[0049] In this embodiment, see Figure 3 and Figure 4 Preferably, the inner bore 13 of the cylinder head body 11 is provided with an oil groove 15 for filling the space between the inner bore 13 and the crankshaft 4 with lubricating oil. When the compressor is running, an oil film can be formed between the inner bore 13 and the crankshaft 4, which acts as a sliding bearing and enhances the rolling support of the crankshaft 4.

[0050] Based on the cylinder head structure 1 of this utility model, this embodiment of the utility model also provides a compressor with a transmission. The compressor with a transmission in this embodiment includes the cylinder head structure 1 described above.

[0051] Preferably, see Figure 1 and Figure 2The compressor with a gearbox in this embodiment also includes a motor, a pump body, a power shaft 3 driven by the motor, a crankshaft 4 passing through a cylinder 6 in the pump body, and a gearbox 2 connecting the power shaft 3 and the crankshaft 4. The input and output ends of the gearbox 2 are respectively connected to the power shaft 3 on the motor side and the crankshaft 4 on the pump body side of the compressor. The motor is the power source for the operation of the compressor. The power shaft 3 passes through the rotor 5 of the motor and is connected and fixed to the rotor 5, so that the rotor 5 of the motor drives the power shaft 3 to rotate synchronously. The pump body is the compression structure of the compressor. The pump body is equipped with a cylinder 6, and the crankshaft 4 passes through the cylinder 6. The eccentric part of the crankshaft 4 drives the piston to make eccentric movements inside the cylinder 6 to compress the working medium introduced into the pump body cylinder 6. The input end of the gearbox 2 is connected to the power shaft 3 and rotates synchronously to receive the rotational torque from the power shaft 3. The output end of the gearbox 2 is connected to the crankshaft 4 and rotates synchronously to output torque to the crankshaft 4 to drive the crankshaft 4 to rotate. The input and output ends of the transmission 2 are connected by a speed-changing transmission mechanism, meaning the output speed at the output end is different from the input speed at the input end. This results in different speeds for the crankshaft 4 on the pump body side and the power shaft 3 on the motor side, enabling asynchronous operation of the compressor motor and pump body. The cylinder head body 11 of the cylinder head structure 1 connects to and seals the end of the cylinder 6 near the transmission 2, forming a sealed pump body structure. The transmission 2 is connected to the bracket portion 12 of the cylinder head structure 1 via the transmission housing 24, allowing the transmission 2 to be installed and fixed inside the compressor. Preferably, the transmission housing 24 and the bracket portion 12 are connected and fixed by bolts. The crankshaft 4 passes through the inner hole 13 on the cylinder head body 11 and connects to the output end of the transmission 2; the crankshaft 4 and the inner hole 13 are in a rotational fit.

[0052] In this embodiment, preferably, the input end and output end of the transmission 2 are connected by a speed reduction transmission mechanism, that is, the output speed of the output end is less than the input speed of the input end, so that the crankshaft 4 on the pump body side is less than the power shaft 3 on the motor side. This can make full use of the characteristics that the motor is more efficient at high speed and the pump body is more efficient at low speed, so that the motor and the pump body can work in their respective optimal efficiency range at the same time, thereby greatly improving the overall efficiency of the compressor.

[0053] In this embodiment, the form of the transmission mechanism of the gearbox 2 is not limited. In a preferred embodiment, see [link to relevant documentation]. Figure 2The transmission mechanism of the gearbox 2 employs a planetary gear transmission mechanism, including a sun gear 21, planet gears 22, a planetary carrier 23, a gearbox housing 24, and a gear ring disposed on the inner surface of the gearbox housing 24. The entire transmission mechanism is integrated within the gearbox housing 24. One end of the sun gear 21 is the input end of the gearbox 2, connected to the power shaft 3 and rotating synchronously. The other end of the sun gear 21 meshes with one side of the planet gear 22, and the other side of the planet gear 22 meshes with the gear ring disposed on the inner surface of the gearbox housing 24. One end of the planetary carrier 23 is fixedly connected to the planet gear 22 and maintains synchronous rotation, while the other end of the planetary carrier 23 is the output end of the gearbox 2, connected to the crankshaft 4 and rotating synchronously. When the rotor 5 of the motor drives the power shaft 3 to rotate, the sun gear 21 rotates accordingly, driving the planet gears 22, the planetary carrier 23, and the crankshaft 4 to rotate. The sun gear 21 and the planet gears 22 have different tooth sizes, enabling variable speed transmission, allowing the crankshaft 4 and the power shaft 3 to operate asynchronously at different speeds.

[0054] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A cylinder head structure of a compressor with a variable speed transmission, characterized by, The input end and the output end of the transmission (2) are connected with the power shaft (3) of the motor side of the compressor and the crankshaft (4) of the pump body side respectively, the cylinder head structure (1) comprises a cylinder head body (11) and a support part (12), one side of the cylinder head body (11) is used for connecting and sealing the cylinder (6) of the pump body near one end of the transmission (2), the support part (12) is fixed to the other side of the cylinder head body (11) and is used for connecting the transmission (2), an inner hole (13) penetrating in the axial direction is arranged on the cylinder head body (11), and the inner hole (13) is used for penetrating the crankshaft (4).

2. The cylinder head structure of a belt-variator-compressor according to claim 1, characterized by, An axle journal (14) is arranged on the side of the cylinder head body (11) away from the cylinder (6), the inner hole (13) penetrates the axle journal (14) in the axial direction, and the support part (12) is arranged on the outer circumferential surface of one end of the axle journal (14) away from the cylinder head body (11).

3. The cylinder head structure of a belt-variator-compressor according to claim 2, characterized by, The support part (12) is connected with the axle journal (14) in an interference fit.

4. The cylinder head structure of a belt-variator-compressor according to claim 1 or 2, characterized by, The support part (12) is welded with the cylinder head body (11).

5. The cylinder head structure of a belt-variator-compressor according to claim 1 or 2, characterized by, The support part (12) and the cylinder head body (11) are designed as an integral whole.

6. The cylinder head structure of a belt-variator-compressor according to claim 1, characterized by, An oil groove (15) is arranged on the hole wall of the inner hole (13).

7. The cylinder head structure of a belt-variator-compressor according to claim 1, characterized by, The support part (12) is used for connecting the transmission housing (24) of the transmission (2).

8. A compressor with a belt variator, characterized by The cylinder head structure (1) of the compressor with the transmission as claimed in any one of claims 1 to 7.

9. The compressor with a belt transmission according to claim 8, characterized in that, Further comprising a motor, a pump body, a power shaft (3) rotating under the driving of the motor, a crankshaft (4) penetrating the cylinder (6) of the pump body, and a transmission (2) connecting the power shaft (3) and the crankshaft (4), the cylinder head body (11) is connected and sealed with one end of the cylinder (6) near the transmission (2), the transmission (2) is connected on the support part (12) through the transmission housing (24), and the crankshaft (4) is connected with the output end of the transmission (2) after penetrating the inner hole (13).

10. The compressor with a belt transmission according to claim 9, characterized in that, The transmission housing (24) is connected with the support part (12) through bolts.

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