Protection structure of small compressor pump body

Abstract

The utility model provides a protection structure of a small-sized compressor pump body, belongs to the technical field of compressors, and solves the problems that in the prior art, dies of various specifications need to be manufactured for a clamping hook type sheath, and the production cost is increased due to the fact that parts cannot be standardized. The air cylinder cover comprises an air cylinder cover detachably installed on a cylinder body through a screw rod, a protruding part is arranged on the air cylinder cover, a clamping type protective sleeve is connected to the air cylinder cover in a clamping mode, a clamping groove which is matched with the protruding part and limits the clamping type protective sleeve to move in the axial direction of the screw rod is formed in the clamping type protective sleeve, and a limiting hole for the screw rod to penetrate through is formed in the clamping type protective sleeve. The clamping type protective sleeve is fixedly installed on the cylinder cover through matching of the clamping groove and the protruding part, then the head of the screw rod is matched with the limiting hole, the clamping groove is prevented from being separated from the protruding part, limiting in the X direction, the Y direction and the Z direction is achieved, firm installation is guaranteed, meanwhile, the size of the clamping type protective sleeve does not need to be adjusted along with the thickness change of a cylinder body, and the clamping type protective sleeve can be manufactured in a standardized mode. And the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, in particular to a protective structure for a small compressor pump body. Background Art

[0002] The compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas and is the heart of the refrigeration system. In car refrigerators, a small reciprocating piston compressor is used to deliver refrigerant to the refrigerator. Since the car refrigerator moves with the vehicle, when the vehicle bumps, the compressor pump body and the shell will collide, generating iron filings (iron filings will conduct electricity and cause the compressor to short-circuit), affecting the normal use of the compressor. Therefore, a plastic protective structure is set on the compressor pump body.

[0003] Existing protection structures such as Figure 1 and 2 As shown, the hook-type sleeve 1 is engaged with the outer sides of the cylinder head 2 and the cylinder body 4, and the hook portion on the hook-type sleeve 1 is inserted into the threaded hole on the cylinder body 4 to achieve fixed installation. This protective structure is a conventional form and is an industry standard installation form. The disadvantage of this protective structure is that for cylinder bodies 4 of different thicknesses, the width of the hook-type sleeve 1 also needs to be changed accordingly, which requires the manufacture of molds of various specifications for the hook-type sleeve 1, and the parts cannot be standardized, resulting in increased production costs. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a protective structure for the pump body of a small compressor, in which a snap-fitting sleeve is fixedly installed on the cylinder head by cooperating between a slot and a protrusion, and then the head of the screw cooperates with the limiting hole to prevent the slot from being separated from the protrusion, thereby achieving limiting in the three directions of X, Y, and Z to ensure a firm installation. At the same time, there is no need to adjust the size of the snap-fitting sleeve as the thickness of the cylinder body changes, and the snap-fitting sleeve can be manufactured in a standardized manner, thereby reducing production costs.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A protective structure for a small compressor pump body comprises a cylinder head detachably mounted on a cylinder body via a screw, the cylinder head being provided with a protrusion, a snap-on sleeve being clamped on the cylinder head, a clamping groove being provided in the snap-on sleeve for cooperating with the protrusion and limiting the axial movement of the snap-on sleeve along the screw, a limiting hole for the screw to pass through being provided on the snap-on sleeve, and a diameter of the limiting hole being adapted to a head diameter of the screw.

[0007] Preferably, the snap-fitting sheath is made of plastic.

[0008] Preferably, the snap-on sheath is made of PBT.

[0009] Preferably, the protrusions are located on both sides of the cylinder head.

[0010] Preferably, the snap-fitting sleeve comprises a panel, and limiting plates that fit the side walls of the cylinder head are connected to both sides of the panel, and limiting holes are provided on the panel.

[0011] Preferably, the upper end surfaces of the panel and the limiting plate are connected to a top plate.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] The snap-fit ​​sleeve is fixedly installed on the cylinder head by the cooperation of the slot and the protrusion, and then the head of the screw cooperates with the limiting hole to prevent the slot from being separated from the protrusion, thereby realizing the limitation in the three directions of X, Y and Z, ensuring a firm installation. At the same time, there is no need to adjust the size of the snap-fit ​​sleeve as the thickness of the cylinder body changes. The snap-fit ​​sleeve can be manufactured in a standardized manner, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the explosion state of the prior art;

[0016] Figure 2 It is a schematic diagram of the combination state of the prior art;

[0017] Figure 3 A schematic diagram of an explosion state provided by an embodiment of the utility model;

[0018] Figure 4 A schematic structural diagram of another embodiment of the protrusion provided by the utility model;

[0019] Figure 5 The present invention is a schematic structural diagram of another embodiment of the protrusion provided in the embodiment of the present utility model.

[0020] Description of the drawings: 1-hook-type sleeve; 2-cylinder head; 3-screw; 4-cylinder body; 5-clamp-type sleeve; 51-panel; 52-limiting hole; 53-limiting plate; 54-top plate; 55-slot; 6-protrusion. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0023] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Combine the following Figure 1-Figure 5 The utility model is described in detail.

[0025] Example

[0026] A protective structure for a small compressor pump body comprises a cylinder head 2 detachably mounted on a cylinder body 4 via a screw 3, a protrusion 6 being arranged on the cylinder head 2, a snap-fitting sleeve 5 being clamped on the cylinder head 2, a clamping groove 55 being arranged in the snap-fitting sleeve 5 for cooperating with the protrusion 6 and limiting the axial movement of the snap-fitting sleeve 5 along the screw 3, a limiting hole 52 for the screw 3 to pass through being opened on the snap-fitting sleeve 5, and a diameter of the limiting hole 52 being adapted to a head diameter of the screw 3.

[0027] The pump body of the small compressor includes a cylinder body 4 and a cylinder head 2 connected to the cylinder body 4. The snap-fitting sleeve 5 is fixedly installed on the cylinder head 2 through the slot 55 and the protrusion 6. The head of the screw 3 cooperates with the limiting hole 52 to prevent the slot 55 from being separated from the protrusion 6, so as to achieve the limiting in the three directions of X, Y and Z, and ensure the firm installation. At the same time, the size of the snap-fitting sleeve 5 does not need to be adjusted with the thickness of the cylinder body 4. The snap-fitting sleeve 5 can be manufactured in a standardized manner, thereby reducing the production cost. The diameter of the head of the screw 3 is not greater than the diameter of the limiting hole 52, and the best diameter of the head of the screw 3 is equal to the diameter of the limiting hole 52. The outer wall of the head of the screw 3 abuts against the inner wall of the limiting hole 52 to prevent the snap-fitting sleeve 5 from moving up and down.

[0028] like Figure 3 As shown, the protrusion 6 is a rectangular structure, and the protrusion 6 is arranged on both sides of the cylinder head 2. The snap-fitting sleeve 5 can be placed from top to bottom so that the slot 55 is inserted into the protrusion 6; Figure 4 and 5 As shown, the protrusion 6 can also be a wedge-shaped structure or a T-shaped structure. When the protrusion 6 is a wedge-shaped structure, the snap-fit ​​sleeve 5 can be pressed onto the cylinder head 2 along the axial direction of the screw 3; when the protrusion 6 is a T-shaped structure, the protrusion 6 is arranged on the end surface of the cylinder head 2 away from the cylinder body 4, and the snap-fit ​​sleeve 5 is also installed from top to bottom.

[0029] The snap-fitting sheath 5 is made of plastic. Plastic can effectively protect the pump body of the small compressor from being worn, and impurities generated by wear and tear will not conduct electricity and affect the use of the compressor.

[0030] The snap-fitting sheath 5 is made of PBT (polybutylene terephthalate), which has good wear resistance and low use cost, and is conducive to mass production and use.

[0031] The protrusions 6 are located on both sides of the cylinder head 2 , which facilitates the production of the cylinder head 2 and the snap-fit ​​sleeve 5 and increases the connection stability of the snap-fit ​​sleeve 5 .

[0032] The snap-fitting sleeve 5 includes a panel 51, and the two sides of the panel 51 are connected with a limit plate 53 that is in contact with the side wall of the cylinder head 2, and the limit hole 52 is formed on the panel 51. A slot 55 is formed on the limit plate 53, and the lower end of the slot 55 is connected to the lower end surface of the limit plate 53. After the snap-fitting sleeve 5 is installed on the cylinder head 2, the limit plate 53 can prevent the snap-fitting sleeve 5 from swinging left and right.

[0033] The upper end surfaces of the panel 51 and the limiting plate 53 are connected with a top plate 54. The top plate 54 increases the connection strength between the panel 51 and the limiting plate 53, and at the same time increases the friction area of ​​the snap-fitting sheath 5 to ensure that the pump body of the small compressor is not worn.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A protective structure for a small compressor pump body, comprising a cylinder head (2) detachably mounted on a cylinder body (4) via a screw (3), characterized in that: The cylinder head (2) is provided with a protruding portion (6), a snap-fitting sleeve (5) is snap-fitted to the cylinder head (2), a snap-fitting sleeve (5) is provided in the snap-fitting sleeve (5) and is configured to cooperate with the protruding portion (6) and to limit the snap-fitting sleeve (5) from moving axially along the screw rod (3), and a limiting hole (52) is provided on the snap-fitting sleeve (5) for the screw rod (3) to pass through, and the diameter of the limiting hole (52) is adapted to the diameter of the head of the screw rod (3).

2. A protective structure for a small compressor pump body according to claim 1, characterized in that: The snap-fitting protective sleeve (5) is made of plastic.

3. A protective structure for a small compressor pump body according to claim 2, characterized in that: The snap-fitting sheath (5) is made of PBT.

4. A protective structure for a small compressor pump body according to claim 1, characterized in that: The protruding parts (6) are located on both sides of the cylinder head (2).

5. The protective structure for a small compressor pump body according to claim 1, characterized in that: The snap-fitting sleeve (5) comprises a panel (51), both sides of which are connected with limiting plates (53) that are in contact with the side walls of the cylinder head (2), and the limiting holes (52) are formed on the panel (51).

6. A protective structure for a small compressor pump body according to claim 5, characterized in that: The upper end surfaces of the panel (51) and the limiting plate (53) are connected to a top plate (54).

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