Threaded cylinder block structure and assembly method thereof

Abstract

The invention discloses a threaded cylinder block structure and an assembling method thereof.The threaded cylinder block structure comprises a cylinder block, a cylinder body is arranged on the cylinder block, the cylinder body is provided with a circular cylinder head, a cylinder cover is arranged on the cylinder head, the cylinder cover is provided with a mounting end, and the mounting end is in threaded connection with the cylinder head; a valve set is arranged on the inner side of the installation end, one face of the valve set abuts against the inner end face of the air cylinder cover, and the other face of the valve set abuts against the end face of the air cylinder head. A traditional bolt installation mode is avoided through threaded connection of the air cylinder cover and the air cylinder seat, and parts such as bolts are omitted, so that the air cylinder head is designed to be round under the condition that the volume ratios of the air cylinder cover and the air cylinder body are not reduced, the peripheral sizes of the air cylinder head and the air cylinder cover are reduced, and the casting cost of the compressor is reduced; meanwhile, the peripheral sizes of the cylinder head and the cylinder cover are reduced, so that the weight of the compressor is reduced, the center-of-gravity shift of the compressor is reduced, and the compressor runs more stably.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a threaded cylinder seat structure and an assembly method thereof. Background Art

[0002] Reciprocating piston compressors are widely used in refrigerators, freezers and other electrical appliances. They have the advantages of high efficiency, stability, long life, strong adaptability and good economy.

[0003] The cylinder head assembly of a reciprocating piston compressor includes components such as the cylinder head and valve group, and is an important component for completing the compressor's intake and exhaust functions. Traditional compressors use four bolts to connect the four corners of the cylinder head to the cylinder seat. Whether it is an external bolt connection or an internal bolt connection, it will increase the volume occupied by the cylinder head body and make the cylinder head assembly heavier. An overweight cylinder head assembly causes the center of gravity of the compressor to shift toward the cylinder head, which is not conducive to the smooth operation of the compressor. In addition, the increase in bolts and other components also increases the manufacturing cost of the compressor. Summary of the invention

[0004] The purpose of the present invention is to provide a threaded cylinder seat structure and an assembly method thereof in view of the problems existing in the prior art. By means of threaded installation, the problem of large space occupation and large volume caused by the bolt connection between the cylinder seat and the cylinder head in the prior art is solved, thereby reducing the volume and weight of the compressor and reducing the production cost of the compressor.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a threaded cylinder seat structure, including a cylinder seat, a cylinder body is arranged on the cylinder seat, the cylinder body is provided with a circular cylinder head, the cylinder head is provided with a cylinder cover, the cylinder head is provided with a mounting end, the mounting end is threadedly connected to the cylinder head, a valve group is provided on the inner side of the mounting end, one side of the valve group abuts against the inner end surface of the cylinder head, and the other side abuts against the end surface of the cylinder head.

[0006] The threaded connection between the cylinder head and the cylinder seat avoids the traditional bolt installation method and eliminates parts such as bolts, so that the cylinder head can be designed to be circular without reducing the volume ratio of the cylinder head and the cylinder body itself, thereby reducing the outer peripheral dimensions of the cylinder head and the cylinder head and reducing the casting cost of the compressor; at the same time, the reduction in the outer peripheral dimensions of the cylinder head and the cylinder head reduces the weight of the compressor, reduces the center of gravity deviation of the compressor, and makes the compressor run more smoothly.

[0007] Furthermore, a limiting portion is provided inside the mounting end, and the valve group is located inside the limiting portion. The limiting portion prevents the valve group from being displaced when the cylinder head rotates.

[0008] Furthermore, a limiting block is arranged on the limiting portion, and the limiting block is a columnar structure with a fan-shaped cross section, and a recess adapted to the limiting block is arranged on the valve group, and the recess is engaged with the limiting block.

[0009] The limit block is configured as a columnar structure with a fan-shaped cross section, which can reduce the stress concentration of the limit block, thereby preventing the compressor from vibrating during operation and causing the valve group to damage the limit block. At the same time, the limit block is engaged with the notch to prevent the valve group from being misaligned during the rotation process.

[0010] Furthermore, a cavity is provided in the cylinder head, and an exhaust hole communicating with the cavity is provided on the cylinder head, an exhaust channel is formed through the exhaust hole, and gas is discharged from the cavity through the exhaust hole.

[0011] Furthermore, a plurality of partitions are arranged in the cavity, and the plurality of partitions are connected to the inner wall of the cavity, and the partitions divide the cavity into a plurality of independent and interconnected small chambers. By dividing the cavity by the partitions, the movement path of the gas in the cavity is increased, thereby slowing down the impact of the gas on the cylinder head, and achieving the effect of reducing noise.

[0012] Furthermore, the cylinder head is provided with a muffler connection port, and the muffler connection port is located at the lower side of the cavity. A muffler is connected through the muffler connection port to reduce working noise.

[0013] Furthermore, a sealing ring is provided on the inner end surface, and the sealing ring is located between the inner end surface and the valve group. The sealing ring can improve the sealing performance when the gas enters the cylinder head, and prevent the gas from leaking out.

[0014] Furthermore, a fastening assembly is provided on the cylinder head, and the fastening assembly improves the connection strength between the cylinder seat and the cylinder head.

[0015] Furthermore, the fastening assembly includes a fastening ring, and fastening blocks for bolts to penetrate are arranged at both ends of the fastening ring. The bolts can be pulled into the distance between the two ends of the fastening ring, so that the fastening ring squeezes the mounting end, further improving the stability of the connection between the cylinder seat and the cylinder head.

[0016] A method for assembling a threaded cylinder seat structure comprises the following steps: installing the valve group into the cylinder head, and engaging a notch arranged on the valve group with a limit block arranged in the cylinder head.

[0017] The cylinder cover is butted against the cylinder head.

[0018] Rotate the cylinder head until it is tightened, and determine whether the orientation of the cylinder head is the installation orientation at this time, and define the installation orientation as: the muffler connection port arranged at the lower part of the cylinder head is vertically facing downward; if the cylinder head is in the installation orientation in the tightened state, the assembly is completed; if the cylinder head is not in the installation orientation in the tightened state, rotate it in the opposite direction to the tightening direction. When the cylinder head returns to the installation orientation for the first time, install and tighten the fastening component arranged on the outside of the cylinder head to complete the assembly.

[0019] Compared with the traditional bolt installation method, the assembly method of this invention is simpler and more convenient, and does not reduce the overall production efficiency.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The traditional bolt installation method is avoided by threading the cylinder head and the cylinder seat, and bolts and other parts are eliminated, so that the cylinder head is designed to be circular without reducing the volume ratio of the cylinder head and the cylinder body itself, reducing the outer peripheral size of the cylinder head and the cylinder head, and reducing the casting cost of the compressor; at the same time, the reduction in the outer peripheral size of the cylinder head and the cylinder head reduces the weight of the compressor, reduces the center of gravity offset of the compressor, and makes the compressor run more smoothly. 2. Since the setting of the bolts is eliminated, the setting of the bolt holes is eliminated in the valve group, thereby reducing the outer peripheral size of the valve group and reducing the material cost of the valve group; at the same time, by setting a limit block on the inner wall of the cylinder head, the rotation of the valve group can be limited to prevent the valve group from being misaligned when the cylinder head is rotated and installed, so as not to affect the intake and exhaust of the compressor. 3. Since bolts and other parts are eliminated, the material cost of the compressor is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a threaded cylinder seat structure of the present invention; Figure 2 A structural schematic diagram of a cylinder head of a threaded cylinder seat structure according to the present invention; Figure 3 A front view of a cylinder head of a threaded cylinder seat structure according to the present invention; Figure 4 A structural schematic diagram of a cylinder body of a threaded cylinder seat structure of the present invention; Figure 5 An exploded view of a valve group of a threaded cylinder seat structure of the present invention; Figure 6 The present invention is a structural schematic diagram of a fastening assembly of a threaded cylinder seat structure.

[0022] In the figure: 1. cylinder seat; 101. cylinder block; 102. cylinder head; 103. cylinder hole; 2. valve group; 201. cylinder head gasket; 202. limit plate; 203. exhaust valve plate; 204. valve plate; 205. intake valve plate; 206. valve plate gasket; 3. cylinder head; 301. inner end surface; 4. limit block; 5. exhaust hole; 6. cavity; 601. partition; 7. mounting end; 701. limit part; 8. muffler connection port; 9. sealing ring; 10. fastening assembly; 1001. fastening ring; 1002. fastening block; 11. recess; 12. muffler. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Embodiment 1

[0027] Combine the following Figures 1 to 5 , through specific embodiments and application scenarios, a threaded cylinder seat structure provided by an embodiment of the present invention is described in detail.

[0028] like Figure 1-5As shown, a threaded cylinder seat structure includes a cylinder seat 1, on which a cylinder body 101 is arranged, and the cylinder body 101 is provided with a circular cylinder head 102. The outer edge of the cylinder head 102 is provided with a thread, and a circular cylinder hole 103 is provided in the cylinder body 101. The mounting end 7 of the cylinder head 3 is circular, and the inner edge of the mounting end 7 is provided with a thread, and the cylinder head 3 is threadedly connected to the cylinder head 102 through the mounting end 7.

[0029] like Figure 2 As shown, a limiting portion 701 is also provided on the inner side of the mounting end 7, and a limiting block 4 is fixedly connected to the limiting portion 701, and the limiting block 4 is provided at the top position of the limiting portion 701. A plurality of limiting blocks 4 can be provided. Preferably, the limiting block 4 is a columnar structure with a fan-shaped cross section. Figure 5 As shown, the valve group 2 is located on the inner side of the limiter 701, and a notch 11 matching the limiter 4 is provided on the valve group 2, and the notch 11 is clamped with the limiter 4. The valve group 2 includes a cylinder head gasket 201, a limiter plate 202, an exhaust valve plate 203, a valve plate 204, an intake valve plate 205, and a valve plate gasket 206, which are sequentially placed in the cylinder head 3. The cylinder head gasket 201, the valve plate 204, the intake valve plate 205, and the valve plate gasket 206 are all circular structures and are provided with a notch 11 matching the limiter 4, and are clamped with the limiter 4 through the notch 11.

[0030] Since the gas is taken in and exhausted through the inlet and exhaust ports provided on the valve group 2, it is necessary to ensure that the hole position inside the valve group 2 is correctly aligned. In the traditional bolt installation method, the valve group and the cylinder head are usually fixed to the cylinder head by bolts to solve the alignment problem. The movement of the valve group and the cylinder head is limited by bolts, so as to ensure the hole position alignment, and then the gas can smoothly enter the cylinder head. This is one of the reasons why the cylinder head is basically connected and fixed by bolts or similar connecting parts in the prior art. The present invention adopts a direct threaded connection between the cylinder head 3 and the cylinder head 102. In order to avoid the misalignment of the hole position of the valve group 2, the present invention limits the overall movement of the valve group 2 by the limiter 701, and prevents the misalignment of the hole position between the cylinder head gasket 201, the valve plate 204 and the intake valve plate 205 by the limiter block 4, so that the valve group 2 rotates with the cylinder head 3 during the assembly process of the cylinder head 3, ensuring that the gas smoothly enters the cylinder head 3. At the same time, in the traditional bolt installation method, the valve group needs to be provided with bolt holes. For the square valve group, bolt holes are set at the four corners, and for the circular valve group, additional connecting ears with bolt holes need to be set. These will lead to an increase in the circumferential size and area of ​​the valve group, which not only increases the manufacturing cost, but also makes the size of the cylinder head and cylinder cover larger. After the cylinder head 3 and the cylinder seat 1 are changed to threaded installation, the present invention cancels the setting of the bolt holes, thereby reducing the outer circumferential size of the valve group 2, reducing the material cost and the outer circumferential size of the cylinder body 101. In addition, the contact surface between the limit block 4 and the recess 11 is set in an arc shape to reduce the stress concentration phenomenon of the limit block 4, and avoid the vibration of the compressor during operation, which causes the valve group 2 to damage the limit block 4.

[0031] Furthermore, a cavity 6 is provided in the cylinder head 3, and a plurality of partitions 601 are provided in the cavity 6. The plurality of partitions 601 are connected to the inner wall of the cavity 6, and the partitions 601 divide the cavity 6 into a plurality of independent and interconnected small chambers. Figure 2 and Figure 3As shown, three partitions 601 are arranged on the inner wall of the cavity 6, wherein two partitions 601 are symmetrically distributed with another partition 601 as the midline. When the gas enters the cavity 6 from the cylinder hole 103 through the valve group 2, it will impact the cavity 6, thereby generating noise. The partition 601 divides the cavity 6 into independent and interconnected small chambers, which can extend the movement path of the gas in the cavity, consume the energy of the gas impacting the inner wall of the cavity 6, and thus reduce the noise. At the same time, in the traditional bolt installation method, the bolt will occupy the volume of the cavity, and too small a volume will affect the working performance of the compressor. However, the bolt setting is cancelled in the present invention, the volume of the cavity 6 is guaranteed, and the working performance of the compressor is improved. A sealing ring 9 is also fixedly connected to the inner end surface 301 of the cylinder head 3, and the sealing ring 9 is located between the inner end surface 301 and the valve group 2. The sealing ring 9 ensures the sealing of the gas when it enters the cavity 6 through the valve group 2. Optionally, the sealing ring 9 is a rubber sealing ring.

[0032] In addition, it should be noted that, since the sealing ring 9 has a certain elasticity, it can be ensured that when the cylinder head 3 is tightened, the two side surfaces of the valve group 2 can respectively abut against the sealing ring 9 and the end surface of the cylinder head 102 .

[0033] like Figure 2 As shown, an exhaust hole 5 is also provided on the cylinder head 3, and the exhaust hole 5 is connected to the cavity 6. The exhaust hole 5 is provided on one side of the cylinder head 3, and the gas in the cavity 6 is discharged from the cavity 6 through the exhaust hole 5. By providing the exhaust hole 5 on the cylinder head 3, the exhaust hole 5 is directly connected to the external pipeline to form an exhaust channel.

[0034] In addition, a detachable fastening assembly 10 is also provided on the outer side of the mounting end 7 of the cylinder head 3. The fastening assembly 10 includes a fastening ring 1001 with two ends that can be butted together, and fastening blocks 1002 are connected to the two ends of the fastening ring 1001. A circular hole is left in the middle of the fastening block 1002 for the bolt to pass through, and a thread is provided on the inner wall of the circular hole. The fastening ring 1001 is installed at the mounting end 7. By tightening the bolts threadedly connected on the fastening blocks 1002 at both ends, the two ends of the fastening ring 1001 are pulled in so that the fastening ring 1001 squeezes the mounting end 7, further improving the stability of the connection between the cylinder body 101 and the cylinder head 3.

[0035] like Figure 1 and Figure 3 As shown, a muffler connection port 8 is provided on the lower side of the cylinder head 3, and a muffler 12 is connected to the muffler connection port 8. The gas enters the cylinder hole 103 through the muffler 12, and the muffler 12 can reduce the working noise.

[0036] The threaded cylinder seat structure provided in this embodiment avoids the traditional bolt installation method by threading the cylinder head 3 and the cylinder seat 1, eliminates the bolts and thus reduces the manufacturing cost of the compressor; at the same time, this direct threaded connection method greatly reduces the peripheral size and volume of the cylinder seat 1 and the cylinder head 3 without reducing the volume ratio of the cylinder head 3 and the cylinder body 101 itself, and also reduces the weight of the cylinder head 102, the cylinder head 3 and the compressor. On the one hand, it reduces the center of gravity offset of the entire cylinder seat 1, making the compressor run more smoothly, and on the other hand, it is also conducive to the miniaturization of the compressor.

[0037] Embodiment 2 This embodiment provides an assembly method for a threaded cylinder seat structure, the assembly method comprising the following steps: The valve group 2 is installed in the cylinder head 3 , and the notch 11 provided on the valve group 2 is engaged with the limit block 4 provided in the cylinder head 3 .

[0038] The cylinder cover 3 is butted against the cylinder head 102 .

[0039] Rotate the cylinder head 3 until it is tightened, and determine whether the orientation of the cylinder head 3 is the installation orientation at this time. The installation orientation is defined as: the muffler connection port 8 provided at the lower part of the cylinder head 3 is vertically downward. If the cylinder head 3 is in the installation orientation in the tightened state, the assembly is completed; if the cylinder head 3 is not in the installation orientation in the tightened state, rotate it in the opposite direction of the tightening direction. When the cylinder head 3 returns to the installation orientation for the first time, install and tighten the fastening assembly 10 provided on the outer side of the cylinder head 3 to complete the assembly.

[0040] Specifically, first, before docking the cylinder head 3 with the cylinder head 102, install the valve group 2 into the cylinder head 3 to ensure that the recess 11 left on the valve group 2 is engaged with the position of the limit block 4, and install the valve group 2 into the cylinder head 3 in the order of cylinder head gasket 201, limit plate 202, exhaust valve plate 203, valve plate 204, intake valve plate 205 and valve plate gasket 206.

[0041] Then, after the valve group 2 is installed in the cylinder head 3 , the muffler 12 is installed to the muffler connecting port 8 , and the cylinder head 3 is butt-jointed with the cylinder head 102 .

[0042] In this embodiment, the cylinder head 3 is rotated clockwise to a tightened state. The cylinder head 3 is rotated clockwise until it is tightened, and it is determined whether the cylinder head 3 is assembled at this time.

[0043] The position of the cylinder head 3 in the tightened state is judged to determine whether the assembly is completed. The judgment method is as follows: If it is in the installation position, the assembly is completed. If it is not in the installation position, rotate the cylinder head 3 counterclockwise, wherein, if the counterclockwise rotation angle is less than or equal to 180°, rotate until the cylinder head 3 returns to the installation position for the first time, sleeve the fastening assembly 10 on the installation end 7, tighten the bolts on the fastening block 1002, so that the fastening ring 1001 squeezes the installation end 7, and the fastening ring 1001 further improves the connection strength between the cylinder seat 1 and the cylinder head 3, and the assembly is completed; if the counterclockwise rotation angle is greater than 180°, the sealing ring 9 with a larger thickness can be replaced, and the assembly is restarted.

[0044] It should be noted that the sealing ring 9 abutting against one side of the valve group 2 has a certain elasticity. When the counterclockwise rotation angle is less than 180°, the two side surfaces of the valve group 2 can still maintain abutment with the sealing ring 9 and the end surface of the cylinder head 102 respectively, thereby ensuring the sealing performance.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A threaded cylinder seat structure, comprising a cylinder seat (1), wherein a cylinder body (101) is arranged on the cylinder seat (1), and the cylinder body (101) is provided with a circular cylinder head (102), characterized in that: A cylinder head (102) is provided with a cylinder cover (3), the cylinder head (3) is provided with a mounting end (7), the mounting end (7) is threadedly connected to the cylinder head (102), a valve group (2) is provided on the inner side of the mounting end (7), one side of the valve group (2) abuts against an inner end surface (301) of the cylinder head (3), and the other side abuts against an end surface of the cylinder head (102).

2. A threaded cylinder seat structure according to claim 1, characterized in that: A limiting portion (701) is provided on the inner side of the mounting end (7), and the valve group (2) is located on the inner side of the limiting portion (701).

3. A threaded cylinder seat structure according to claim 2, characterized in that: A limiting block (4) is provided on the limiting portion (701), the limiting block (4) being a columnar structure with a fan-shaped cross section, and a recess (11) adapted to the limiting block (4) is provided on the valve group (2), the recess being snap-fitted to the limiting block (4).

4. A threaded cylinder seat structure according to claim 1, characterized in that: A cavity (6) is provided in the cylinder head (3), and an exhaust hole (5) communicating with the cavity (6) is provided on the cylinder head (3).

5. A threaded cylinder seat structure according to claim 4, characterized in that: A plurality of partitions (601) are arranged in the cavity (6); the plurality of partitions (601) are connected to the inner wall of the cavity (6); the partitions (601) divide the cavity (6) into a plurality of independent and interconnected small chambers.

6. A threaded cylinder seat structure according to claim 4, characterized in that: The cylinder head (3) is provided with a muffler connection port (8), and the muffler connection port (8) is located at the lower side of the cavity (6).

7. The threaded cylinder seat structure according to claim 1, characterized in that: A sealing ring (9) is provided on the inner end surface (301), and the sealing ring (9) is located between the inner end surface (301) and the valve group (2).

8. The threaded cylinder seat structure according to claim 1, characterized in that: A fastening assembly (10) is provided on the outer side of the mounting end (7).

9. A threaded cylinder seat structure according to claim 7, characterized in that: The fastening assembly (10) comprises a fastening ring (1001), and fastening blocks (1002) for bolts to penetrate are arranged at both ends of the fastening ring (1001).

10. The method for assembling a threaded cylinder seat structure according to any one of claims 1 to 9, characterized in that: The assembly method is as follows: The valve group (2) is installed in the cylinder head (3), and the notch (11) provided on the valve group (2) is engaged with the limit block (4) provided in the cylinder head (3); Butt-jointing the cylinder cover (3) with the cylinder head (102); The cylinder head (3) is rotated until it is tightened, and it is determined whether the orientation of the cylinder head (3) is the installation orientation at this time, and the installation orientation is defined as: the muffler connection port (8) provided at the lower part of the cylinder head (3) is vertically downward; if the cylinder head (3) is in the installation orientation in the tightened state, the assembly is completed; if the cylinder head (3) is not in the installation orientation in the tightened state, it is rotated in the opposite direction to the tightening direction. When the cylinder head (3) returns to the installation orientation for the first time, the fastening component (10) provided on the outer side of the cylinder head (3) is installed and tightened to complete the assembly.

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