Connecting structure of air cylinder seat and shell

Abstract

The utility model discloses an air cylinder seat and shell connecting structure, which comprises a shell and a pump body, the pump body comprises an air cylinder seat, the air cylinder seat comprises a cylinder head and a connecting table positioned on the rear side of the bottom of the cylinder head, supporting legs are arranged at the bottom of the air cylinder seat, and a motor stator is mounted at the bottom of each supporting leg through a stator screw. The motor stator is provided with a screw connecting hole and a rear mounting hole located at the tail of the motor stator, a tail supporting cap is arranged at the bottom end of the rear mounting hole in a clamped mode, a plurality of lower supporting pieces are arranged on the bottom face of an inner cavity of the shell, and compression springs are arranged between the lower supporting pieces and stator screws and between the lower supporting pieces and the tail supporting cap respectively. A metal limiting piece is arranged at the top of the rear mounting hole, an outer limiting piece is arranged on the shell, and the outer limiting piece comprises limiting parts located on the left side, the right side and the upper side of the metal limiting piece; the limiting device has the advantages of being simple in structure, stable in limiting and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor design, and in particular relates to a connection structure between a cylinder seat and a shell. Background Art

[0002] As the main supporting part of the piston compressor core, the cylinder seat plays a vital role in the entire compressor. The structural design of the cylinder seat directly determines the support method of the compressor. The number and layout of the cylinder seat support feet determine the internal space size and external dimensions of the compressor. The fewer the number of cylinder seat support feet, the less material is used, and the higher the design difficulty.

[0003] Common cylinder seat structural designs include two-legged support structure with one support leg at the head and one at the tail; three-legged support scheme with two support legs at the head and one at the tail or one support leg at the head and two at the tail; and four-legged support scheme with two legs at the head and two at the tail. The above structures usually use limit columns designed at the head and tail of the cylinder seat to cooperate with the shell to limit the position, so as to avoid structural damage and safety problems caused by collision and friction between the internal suction silencer cavity, support block, motor enameled wire and the shell during transportation and use.

[0004] The problem with the prior art is that the existing cylinder seat is designed with limit columns and support feet at the front and rear, which makes it difficult to reduce the length or width of the compressor. Some specific fields, such as household ice makers, car refrigerators, and mini boxes, have strict requirements on the installation space of the compressor. The cylinder seat in the existing compressor has a complex structure and is difficult to reduce the spatial size to meet the requirements; the cylinder seat has a complex structure and a large size, which increases the consumables of the cylinder seat and leads to increased costs; if the limit columns at the head or tail are cancelled, the compressor pump body will lack limit, which will cause structural damage and safety problems. Summary of the invention

[0005] The utility model aims to solve the problems existing in the prior art and provide a connection structure between a cylinder seat and a shell, which has the advantages of simple structure, stable limit and low cost.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a connection structure between a cylinder seat and a shell, comprising a shell and a pump body, the pump body comprising a cylinder seat, the cylinder seat comprising a cylinder head and a connecting platform located at the rear side of the bottom of the cylinder head, a supporting foot is arranged at the bottom of the cylinder seat, a motor stator is installed at the bottom of the supporting foot through a stator screw, a screw connecting hole and a rear mounting hole located at the tail of the motor stator are opened on the motor stator, a tail supporting cap is clamped at the bottom end of the rear mounting hole, a plurality of lower supporting members are arranged on the bottom surface of the inner cavity of the shell, compression springs are respectively arranged between the lower supporting member and the stator screw, and between the lower supporting member and the tail supporting cap; a metal limiting member is arranged at the top of the rear mounting hole, an external limiting member is arranged on the shell, and the external limiting member comprises limiting parts located on the left and right sides and the upper side of the metal limiting member.

[0007] In the above scheme, the pump body is installed in the inner cavity of the shell, the pump body is the core component of the compressor for realizing gas compression, the cylinder seat is the main support of the pump body, which is used to position the transmission mechanism and the motor, the cylinder head is used to position the piston and perform gas compression, the connecting platform is used to position the crankshaft, the supporting feet at the bottom of the cylinder seat are fitted and positioned with the motor stator, and the stator screws are connected to realize the fastening of the motor stator, the stator screws are set through the screw connection holes, and the rear mounting holes are opened at the tail of the motor stator to position the tail support cap and the metal limiter, the inner cavity of the shell is provided with a lower support to position the bottom of the compression spring, and the support of the bottom surface of the motor stator is realized through the top of the compression spring, and the top of the compression spring is horizontally limited by the bottom head and tail support cap of the stator screw to ensure the stable support of the motor stator by the compression spring, and the top of the rear mounting hole is connected with the metal limiter to cooperate with the limiting part of the outer limiting part on the shell to realize the positioning of the moving range of the tail of the motor stator.

[0008] Furthermore, the tail support cap includes a cap body and a snap-fit ​​body arranged at one end of the cap body, and the snap-fit ​​body is snap-fitted at the bottom of the rear mounting hole.

[0009] The engaging body is engaged and fixed with the rear mounting hole, and the cap body is used to cooperate with the top of the compression spring to achieve the connection between the two.

[0010] Furthermore, the engaging body includes a plurality of elastic blocks, and the cross section of the cap body is circular.

[0011] The elastic block is used to realize the clamping and positioning between the side wall of the rear mounting hole to prevent loosening. The cross section of the cap body is circular, and the size corresponds to the inner hole of the compression spring, which is convenient for clamping with the compression spring.

[0012] Furthermore, the metal limiting component includes a limiting body, one end of which is provided with a plug-in body, and the plug-in body is plugged into the top of the rear mounting hole.

[0013] The limiting body is used to cooperate with the limiting portion, and the plug-in body is used to cooperate and fix with the rear mounting hole.

[0014] Furthermore, the limiting portion includes an end column, and the outer limiting member includes a connecting rod for connecting the end column.

[0015] The connecting rod of the outer limiting member is used to connect the end column and the shell, and the limiting body is limited by the end column.

[0016] Furthermore, a threaded mounting hole is provided at the bottom of the support foot, and a stator screw for fixing the motor stator is screwed into the threaded mounting hole. The threaded mounting hole is used to perform a customized screw connection, and the structure is simple.

[0017] Furthermore, a shaft sleeve is arranged at the bottom of the cylinder seat, and the pump body includes a crankshaft rotatably arranged in the shaft sleeve. The crankshaft is connected through the shaft sleeve, and the connection is stable.

[0018] Furthermore, the housing comprises a lower shell, the top of the lower shell is provided with an opening, and the bottom of the lower shell is provided with mechanical feet. The opening at the top of the lower shell is used for connecting the pump body, and the mechanical feet are used for connecting and fixing the bottom of the compressor.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. By eliminating the limit column and support foot at the rear of the cylinder seat, it is helpful to reduce the volume of the cylinder seat and the compressor, simplify the structure, reduce material consumption and reduce costs;

[0021] 2. By setting an external limiter on the housing to cooperate with the metal limiter on the motor stator, the limiter column structure at the tail of the cylinder seat is replaced to ensure the limit of the compressor pump body, avoiding damage to the pump body structure and safety problems caused by lack of limiter; the cylinder seat and the motor stator are connected stator screws at the support feet to ensure the stability of the connection between the two;

[0022] 3. The outer limiter limits the upper side and left and right sides of the metal limiter through the limiter, and the metal limiter and the tail support cap are connected by opening the rear mounting hole. The structure is simple and the manufacturing is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural stereogram of a connection structure between a cylinder seat and a housing according to Embodiment 1 of the utility model;

[0024] Figure 2 This is a structural cross-sectional view of a connection structure between a cylinder seat and a housing according to Embodiment 1 of the utility model;

[0025] Figure 3This is a structural stereogram of the pump body in Example 1 of the utility model;

[0026] In the figure: 1. lower shell; 2. cylinder head; 3. connecting platform; 4. supporting foot; 5. stator screw; 6. motor stator; 7. screw connecting hole; 8. rear mounting hole; 9. limiting body; 10. plug-in body; 11. compression spring; 12. lower support member; 13. end column; 14. connecting rod; 15. cap body; 16. elastic block; 17. shaft sleeve; 18. crankshaft; 19. limiting protrusion. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the utility model product is usually placed when used. They are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0028] Example 1

[0029] like Figure 1-3 As shown, a connection structure between a cylinder seat and a shell comprises a shell and a pump body, wherein the pump body comprises a cylinder seat, and the cylinder seat comprises a cylinder head 2 and a connecting platform 3 located at the rear side of the bottom of the cylinder head 2, a supporting foot 4 is arranged at the bottom of the cylinder seat, a motor stator 6 is installed at the bottom of the supporting foot 4 through a stator screw 5, a screw connecting hole 7 and a rear mounting hole 8 located at the tail of the motor stator 6 are opened on the motor stator 6, a rear support cap is clamped at the bottom end of the rear mounting hole 8, a plurality of lower support members 12 are arranged on the bottom surface of the inner cavity of the shell, compression springs 11 are respectively arranged between the lower support member 12 and the stator screw 5, and between the lower support member 12 and the tail support cap; a metal limit member is arranged at the top of the rear mounting hole 8, and an external limit member is arranged on the shell, and the external limit member comprises limit portions located on the left, right and upper sides of the metal limit member.

[0030] In the above scheme, the pump body is installed in the inner cavity of the shell, the pump body is the core component of the compressor for realizing gas compression, the cylinder seat is the main support of the pump body, and is used to position the transmission mechanism and the motor, the cylinder head 2 is used to position the piston and perform gas compression, the connecting platform 3 is used to position the crankshaft 18, the supporting foot 4 at the bottom of the cylinder seat is fitted and positioned with the motor stator 6, and the stator screw 5 is connected to realize the fastening of the motor stator 6, the stator screw 5 is set through the screw connection hole 7, and the rear mounting hole 8 is opened at the tail of the motor stator 6 to Position the tail support cap and the metal limiter, and set a lower support member 12 in the inner cavity of the shell to position the bottom of the compression spring 11. The support of the bottom surface of the motor stator 6 is achieved through the top of the compression spring 11. The top of the compression spring 11 is limited in the horizontal direction by the bottom head of the stator screw 5 and the tail support cap to ensure that the compression spring 11 stably supports the motor stator 6. The top of the rear mounting hole 8 is connected to the metal limiter to cooperate with the limiting part of the outer limiting member on the shell to achieve positioning of the moving range of the tail of the motor stator 6.

[0031] The lower support member 12 includes a truncated cone structure welded on the shell, and the outer diameter of the truncated cone structure matches the inner hole size of the compression spring 11. The movement of the metal limiter in the left, right, upper and rear directions is limited by the limiting part. The cap body 15 and the limiting body 9 both include a truncated cone and a circular plate at the bottom of the truncated cone. The support foot 4 is located on the left and right sides of the front side or the left and right sides of the rear side of the cylinder seat. The motor rotor is fixed to the bottom end of the crankshaft 18, and the motor rotor is located at the inner hole of the motor stator 6. The screw connection hole 7 and the rear mounting hole 8 are distributed in a triangular shape, and two stator screws 5 and a tail support cap are distributed along the triangle at the bottom of the motor stator 6, corresponding to three compression springs 11 to ensure the support stability. The metal limiter and the tail support cap can also be connected to the rear mounting hole 8 by threading.

[0032] Furthermore, the tail support cap includes a cap body 15 and a snap-fitting body provided at one end of the cap body 15 , and the snap-fitting body is snap-fitted at the bottom of the rear mounting hole 8 .

[0033] The cap body 15 is engaged and fixed with the rear mounting hole 8 through the engaging body, and is used to cooperate with the top of the compression spring 11 to achieve the connection between the two.

[0034] Furthermore, the engaging body includes a plurality of elastic blocks 16, and the cross section of the cap body 15 is circular.

[0035] The elastic block 16 is used to realize the engagement and positioning with the side wall of the rear mounting hole 8 to prevent loosening. The cross section of the cap body 15 is circular, and its size corresponds to the inner hole of the compression spring 11, so it is convenient to engage with the compression spring 11.

[0036] The clamping body includes two elastic blocks 16 arranged opposite to each other, and the ends of the elastic blocks 16 can protrude outward to ensure a firm clamping. The tail support cap is a plastic structure. The elastic block 16 is designed to expand and open so that it is in an interference fit state after being inserted into the hole.

[0037] Furthermore, the metal limiting component includes a limiting body 9 , one end of which is provided with a plug-in body 10 , and the plug-in body 10 is plugged into the top of the rear mounting hole 8 .

[0038] The limiting body 9 is used to cooperate with the limiting portion, and the plug-in body 10 is used to cooperate and fix with the rear mounting hole 8.

[0039] The plug-in body 10 and the top of the rear mounting hole 8 can be interference fit or screwed. Because the cylinder seat has no tail, it is impossible to design a limit column at the tail for limiting like the traditional cylinder seat. This scheme designs a metal limiter, the upper section of which is circular, and the bottom is designed as a guide cone as the plug-in body 10 and pressed into the rear mounting hole 8 by cold pressing. The interference fit is used in size to ensure that it will not fall off.

[0040] Furthermore, the limiting portion includes an end column 13 , and the outer limiting member includes a connecting rod 14 for connecting the end column 13 .

[0041] The connecting rod 14 of the outer limiting member is used to connect the end column 13 and the housing, and the limiting body 9 is limited by the end column 13 .

[0042] The cross section of the end column 13 can be rectangular or circular, and the connecting rod 14 is welded to the shell. A three-column limit bracket is welded at the corresponding position of the lower shell 1, and the metal limiter is limited in it to limit its position, so as to ensure the complete limit of the tail of the design scheme and ensure that the compressor is in a safe state during transportation.

[0043] Furthermore, a threaded mounting hole is provided at the bottom of the support foot 4, and a stator screw 5 for fixing the motor stator 6 is screwed into the threaded mounting hole. The threaded mounting hole is used to perform customized screw connection, and the structure is simple.

[0044] Further, a shaft sleeve 17 is provided at the bottom of the cylinder seat, and the pump body includes a crankshaft 18 rotatably arranged in the shaft sleeve 17. The crankshaft 18 is connected through the shaft sleeve 17, and the connection is stable.

[0045] Furthermore, the housing comprises a lower shell 1, the top of the lower shell 1 is provided with an opening, and the bottom of the lower shell 1 is provided with a foot. The opening at the top of the lower shell 1 is used for pump body connection, and the foot is used for connecting and fixing the bottom of the compressor.

[0046] In the embodiment, the upper opening of the lower shell 1 is used for welding the upper cover.

[0047] The housing comprises a lower shell 1, the top of the lower shell 1 is provided with an opening and an upper cover, and the top of the cylinder head 2 is provided with a limiting protrusion 19 for matching with the upper cover. The bottom of the lower shell 1 is provided with a foot.

[0048] 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 connection structure between a cylinder seat and a housing, characterized in that: It includes a shell and a pump body, the pump body includes a cylinder seat, the cylinder seat includes a cylinder head and a connecting platform located at the rear side of the bottom of the cylinder head, the bottom of the cylinder seat is provided with a supporting foot, the bottom of the supporting foot is installed with a motor stator through a stator screw, the motor stator is provided with a screw connecting hole and a rear mounting hole located at the tail of the motor stator, the bottom end of the rear mounting hole is clamped with a tail support cap, a plurality of lower support members are provided on the bottom surface of the inner cavity of the shell, compression springs are respectively provided between the lower support member and the stator screw, and between the lower support member and the tail support cap; a metal limit member is provided on the top of the rear mounting hole, an external limit member is provided on the shell, and the external limit member includes limiting parts located on the left and right sides and the upper side of the metal limit member.

2. The connection structure between the cylinder seat and the housing according to claim 1, characterized in that: The tail support cap comprises a cap body and a clamping body arranged at one end of the cap body, and the clamping body is clamped and arranged at the bottom of the rear mounting hole.

3. The connection structure between the cylinder seat and the housing according to claim 2, characterized in that: The engaging body comprises a plurality of elastic blocks, and the cross section of the cap body is circular.

4. The connection structure between the cylinder seat and the housing according to claim 1, characterized in that: The metal limiting component comprises a limiting body, one end of which is provided with a plug-in body, and the plug-in body is plugged into the top of the rear mounting hole.

5. The connection structure between the cylinder seat and the housing according to claim 1, characterized in that: The limiting portion includes an end column, and the outer limiting member includes a connecting rod for connecting the end column.

6. The connection structure between the cylinder seat and the housing according to claim 1, characterized in that: A threaded mounting hole is provided at the bottom of the supporting foot, and a stator screw for fixing the motor stator is threaded into the threaded mounting hole.

7. The connection structure between the cylinder seat and the housing according to claim 1, characterized in that: A shaft sleeve is disposed at the bottom of the cylinder seat, and the pump body includes a crankshaft rotatably disposed in the shaft sleeve.

8. The connection structure between the cylinder seat and the housing according to claim 1, characterized in that: The housing comprises a lower shell, the top of the lower shell is provided with an opening and an upper cover, and the top of the cylinder head is provided with a limiting protrusion for cooperating with the upper cover.

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